summaryrefslogtreecommitdiff
path: root/src/process.c
blob: 1afb701dd2845bea43ac23fb114e2468bdce82b1 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
2503
2504
2505
2506
2507
2508
2509
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519
2520
2521
2522
2523
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538
2539
2540
2541
2542
2543
2544
2545
2546
2547
2548
2549
2550
2551
2552
2553
2554
2555
2556
2557
2558
2559
2560
2561
2562
2563
2564
2565
2566
2567
2568
2569
2570
2571
2572
2573
2574
2575
2576
2577
2578
2579
2580
2581
2582
2583
2584
2585
2586
2587
2588
2589
2590
2591
2592
2593
2594
2595
2596
2597
2598
2599
2600
2601
2602
2603
2604
2605
2606
2607
2608
2609
2610
2611
2612
2613
2614
2615
2616
2617
2618
2619
2620
2621
2622
2623
2624
2625
2626
2627
2628
2629
2630
2631
2632
2633
2634
2635
2636
2637
2638
2639
2640
2641
2642
2643
2644
2645
2646
2647
2648
2649
2650
2651
2652
2653
2654
2655
2656
2657
2658
2659
2660
2661
2662
2663
2664
2665
2666
2667
2668
2669
2670
2671
2672
2673
2674
2675
2676
2677
2678
2679
2680
2681
2682
2683
2684
2685
2686
2687
2688
2689
2690
2691
2692
2693
2694
2695
2696
2697
2698
2699
2700
2701
2702
2703
2704
2705
2706
2707
2708
2709
2710
2711
2712
2713
2714
2715
2716
2717
2718
2719
2720
2721
2722
2723
2724
2725
2726
2727
2728
2729
2730
2731
2732
2733
2734
2735
2736
2737
2738
2739
2740
2741
2742
2743
2744
2745
2746
2747
2748
2749
2750
2751
2752
2753
2754
2755
2756
2757
2758
2759
2760
2761
2762
2763
2764
2765
2766
2767
2768
2769
2770
2771
2772
2773
2774
2775
2776
2777
2778
2779
2780
2781
2782
2783
2784
2785
2786
2787
2788
2789
2790
2791
2792
2793
2794
2795
2796
2797
2798
2799
2800
2801
2802
2803
2804
2805
2806
2807
2808
2809
2810
2811
2812
2813
2814
2815
2816
2817
2818
2819
2820
2821
2822
2823
2824
2825
2826
2827
2828
2829
2830
2831
2832
2833
2834
2835
2836
2837
2838
2839
2840
2841
2842
2843
2844
2845
2846
2847
2848
2849
2850
2851
2852
2853
2854
2855
2856
2857
2858
2859
2860
2861
2862
2863
2864
2865
2866
2867
2868
2869
2870
2871
2872
2873
2874
2875
2876
2877
2878
2879
2880
2881
2882
2883
2884
2885
2886
2887
2888
2889
2890
2891
2892
2893
2894
2895
2896
2897
2898
2899
2900
2901
2902
2903
2904
2905
2906
2907
2908
2909
2910
2911
2912
2913
2914
2915
2916
2917
2918
2919
2920
2921
2922
2923
2924
2925
2926
2927
2928
2929
2930
2931
2932
2933
2934
2935
2936
2937
2938
2939
2940
2941
2942
2943
2944
2945
2946
2947
2948
2949
2950
2951
2952
2953
2954
2955
2956
2957
2958
2959
2960
2961
2962
2963
2964
2965
2966
2967
2968
2969
2970
2971
2972
2973
2974
2975
2976
2977
2978
2979
2980
2981
2982
2983
2984
2985
2986
2987
2988
2989
2990
2991
2992
2993
2994
2995
2996
2997
2998
2999
3000
3001
3002
3003
3004
3005
3006
3007
3008
3009
3010
3011
3012
3013
3014
3015
3016
3017
3018
3019
3020
3021
3022
3023
3024
3025
3026
3027
3028
3029
3030
3031
3032
3033
3034
3035
3036
3037
3038
3039
3040
3041
3042
3043
3044
3045
3046
3047
3048
3049
3050
3051
3052
3053
3054
3055
3056
3057
3058
3059
3060
3061
3062
3063
3064
3065
3066
3067
3068
3069
3070
3071
3072
3073
3074
3075
3076
3077
3078
3079
3080
3081
3082
3083
3084
3085
3086
3087
3088
3089
3090
3091
3092
3093
3094
3095
3096
3097
3098
3099
3100
3101
3102
3103
3104
3105
3106
3107
3108
3109
3110
3111
3112
3113
3114
3115
3116
3117
3118
3119
3120
3121
3122
3123
3124
3125
3126
3127
3128
3129
3130
3131
3132
3133
3134
3135
3136
3137
3138
3139
3140
3141
3142
3143
3144
3145
3146
3147
3148
3149
3150
3151
3152
3153
3154
3155
3156
3157
3158
3159
3160
3161
3162
3163
3164
3165
3166
3167
3168
3169
3170
3171
3172
3173
3174
3175
3176
3177
3178
3179
3180
3181
3182
3183
3184
3185
3186
3187
3188
3189
3190
3191
3192
3193
3194
3195
3196
3197
3198
3199
3200
3201
3202
3203
3204
3205
3206
3207
3208
3209
3210
3211
3212
3213
3214
3215
3216
3217
3218
3219
3220
3221
3222
3223
3224
3225
3226
3227
3228
3229
3230
3231
3232
3233
3234
3235
3236
3237
3238
3239
3240
3241
3242
3243
3244
3245
3246
3247
3248
3249
3250
3251
3252
3253
3254
3255
3256
3257
3258
3259
3260
3261
3262
3263
3264
3265
3266
3267
3268
3269
3270
3271
3272
3273
3274
3275
3276
3277
3278
3279
3280
3281
3282
3283
3284
3285
3286
3287
3288
3289
3290
3291
3292
3293
3294
3295
3296
3297
3298
3299
3300
3301
3302
3303
3304
3305
3306
3307
3308
3309
3310
3311
3312
3313
3314
3315
3316
3317
3318
3319
3320
3321
3322
3323
3324
3325
3326
3327
3328
3329
3330
3331
3332
3333
3334
3335
3336
3337
3338
3339
3340
3341
3342
3343
3344
3345
3346
3347
3348
3349
3350
3351
3352
3353
3354
3355
3356
3357
3358
3359
3360
3361
3362
3363
3364
3365
3366
3367
3368
3369
3370
3371
3372
3373
3374
3375
3376
3377
3378
3379
3380
3381
3382
3383
3384
3385
3386
3387
3388
3389
3390
3391
3392
3393
3394
3395
3396
3397
3398
3399
3400
3401
3402
3403
3404
3405
3406
3407
3408
3409
3410
3411
3412
3413
3414
3415
3416
3417
3418
3419
3420
3421
3422
3423
3424
3425
3426
3427
3428
3429
3430
3431
3432
3433
3434
3435
3436
3437
3438
3439
3440
3441
3442
3443
3444
3445
3446
3447
3448
3449
3450
3451
3452
3453
3454
3455
3456
3457
3458
3459
3460
3461
3462
3463
3464
3465
3466
3467
3468
3469
3470
3471
3472
3473
3474
3475
3476
3477
3478
3479
3480
3481
3482
3483
3484
3485
3486
3487
3488
3489
3490
3491
3492
3493
3494
3495
3496
3497
3498
3499
3500
3501
3502
3503
3504
3505
3506
3507
3508
3509
3510
3511
3512
3513
3514
3515
3516
3517
3518
3519
3520
3521
3522
3523
3524
3525
3526
3527
3528
3529
3530
3531
3532
3533
3534
3535
3536
3537
3538
3539
3540
3541
3542
3543
3544
3545
3546
3547
3548
3549
3550
3551
3552
3553
3554
3555
3556
3557
3558
3559
3560
3561
3562
3563
3564
3565
3566
3567
3568
3569
3570
3571
3572
3573
3574
3575
3576
3577
3578
3579
3580
3581
3582
3583
3584
3585
3586
3587
3588
3589
3590
3591
3592
3593
3594
3595
3596
3597
3598
3599
3600
3601
3602
3603
3604
3605
3606
3607
3608
3609
3610
3611
3612
3613
3614
3615
3616
3617
3618
3619
3620
3621
3622
3623
3624
3625
3626
3627
3628
3629
3630
3631
3632
3633
3634
3635
3636
3637
3638
3639
3640
3641
3642
3643
3644
3645
3646
3647
3648
3649
3650
3651
3652
3653
3654
3655
3656
3657
3658
3659
3660
3661
3662
3663
3664
3665
3666
3667
3668
3669
3670
3671
3672
3673
3674
3675
3676
3677
3678
3679
3680
3681
3682
3683
3684
3685
3686
3687
3688
3689
3690
3691
3692
3693
3694
3695
3696
3697
3698
3699
3700
3701
3702
3703
3704
3705
3706
3707
3708
3709
3710
3711
3712
3713
3714
3715
3716
3717
3718
3719
3720
3721
3722
3723
3724
3725
3726
3727
3728
3729
3730
3731
3732
3733
3734
3735
3736
3737
3738
3739
3740
3741
3742
3743
3744
3745
3746
3747
3748
3749
3750
3751
3752
3753
3754
3755
3756
3757
3758
3759
3760
3761
3762
3763
3764
3765
3766
3767
3768
3769
3770
3771
3772
3773
3774
3775
3776
3777
3778
3779
3780
3781
3782
3783
3784
3785
3786
3787
3788
3789
3790
3791
3792
3793
3794
3795
3796
3797
3798
3799
3800
3801
3802
3803
3804
3805
3806
3807
3808
3809
3810
3811
3812
3813
3814
3815
3816
3817
3818
3819
3820
3821
3822
3823
3824
3825
3826
3827
3828
3829
3830
3831
3832
3833
3834
3835
3836
3837
3838
3839
3840
3841
3842
3843
3844
3845
3846
3847
3848
3849
3850
3851
3852
3853
3854
3855
3856
3857
3858
3859
3860
3861
3862
3863
3864
3865
3866
3867
3868
3869
3870
3871
3872
3873
3874
3875
3876
3877
3878
3879
3880
3881
3882
3883
3884
3885
3886
3887
3888
3889
3890
3891
3892
3893
3894
3895
/* Asynchronous subprocess control for GNU Emacs.
   Copyright (C) 1985, 86, 87, 88, 93, 94, 95 Free Software Foundation, Inc.

This file is part of GNU Emacs.

GNU Emacs is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.

GNU Emacs is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with GNU Emacs; see the file COPYING.  If not, write to
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */


#include <signal.h>

#include <config.h>

/* This file is split into two parts by the following preprocessor
   conditional.  The 'then' clause contains all of the support for
   asynchronous subprocesses.  The 'else' clause contains stub
   versions of some of the asynchronous subprocess routines that are
   often called elsewhere in Emacs, so we don't have to #ifdef the
   sections that call them.  */


#ifdef subprocesses

#include <stdio.h>
#include <errno.h>
#include <setjmp.h>
#include <sys/types.h>		/* some typedefs are used in sys/file.h */
#include <sys/file.h>
#include <sys/stat.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif

#ifdef WINDOWSNT
#include <stdlib.h>
#include <fcntl.h>
#endif /* not WINDOWSNT */

#ifdef HAVE_SOCKETS	/* TCP connection support, if kernel can do it */
#include <sys/socket.h>
#include <netdb.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#ifdef NEED_NET_ERRNO_H
#include <net/errno.h>
#endif /* NEED_NET_ERRNO_H */
#endif /* HAVE_SOCKETS */

/* TERM is a poor-man's SLIP, used on Linux.  */
#ifdef TERM
#include <client.h>
#endif

/* On some systems, e.g. DGUX, inet_addr returns a 'struct in_addr'. */
#ifdef HAVE_BROKEN_INET_ADDR
#define IN_ADDR struct in_addr
#define NUMERIC_ADDR_ERROR (numeric_addr.s_addr == -1)
#else
#define IN_ADDR unsigned long
#define NUMERIC_ADDR_ERROR (numeric_addr == -1)
#endif

#if defined(BSD) || defined(STRIDE)
#include <sys/ioctl.h>
#if !defined (O_NDELAY) && defined (HAVE_PTYS) && !defined(USG5)
#include <fcntl.h>
#endif /* HAVE_PTYS and no O_NDELAY */
#endif /* BSD or STRIDE */

#ifdef BROKEN_O_NONBLOCK
#undef O_NONBLOCK
#endif /* BROKEN_O_NONBLOCK */

#ifdef NEED_BSDTTY
#include <bsdtty.h>
#endif

#ifdef IRIS
#include <sys/sysmacros.h>	/* for "minor" */
#endif /* not IRIS */

#include "systime.h"
#include "systty.h"

#include "lisp.h"
#include "window.h"
#include "buffer.h"
#include "process.h"
#include "termhooks.h"
#include "termopts.h"
#include "commands.h"
#include "frame.h"

Lisp_Object Qprocessp;
Lisp_Object Qrun, Qstop, Qsignal, Qopen, Qclosed;
Lisp_Object Qlast_nonmenu_event;
/* Qexit is declared and initialized in eval.c.  */

/* a process object is a network connection when its childp field is neither
   Qt nor Qnil but is instead a string (name of foreign host we
   are connected to + name of port we are connected to) */

#ifdef HAVE_SOCKETS
static Lisp_Object stream_process;

#define NETCONN_P(p) (GC_STRINGP (XPROCESS (p)->childp))
#else
#define NETCONN_P(p) 0
#endif /* HAVE_SOCKETS */

/* Define first descriptor number available for subprocesses.  */
#ifdef VMS
#define FIRST_PROC_DESC 1
#else /* Not VMS */
#define FIRST_PROC_DESC 3
#endif

/* Define SIGCHLD as an alias for SIGCLD.  There are many conditionals
   testing SIGCHLD.  */

#if !defined (SIGCHLD) && defined (SIGCLD)
#define SIGCHLD SIGCLD
#endif /* SIGCLD */

#include "syssignal.h"

#include "syswait.h"

extern int errno;
extern char *strerror ();
#ifdef VMS
extern char *sys_errlist[];
#endif

#ifndef HAVE_H_ERRNO
extern int h_errno;
#endif

#ifndef SYS_SIGLIST_DECLARED
#ifndef VMS
#ifndef BSD4_1
#ifndef WINDOWSNT
#ifndef LINUX
extern char *sys_siglist[];
#endif /* not LINUX */
#else /* BSD4_1 */
char *sys_siglist[] =
  {
    "bum signal!!",
    "hangup",
    "interrupt",
    "quit",
    "illegal instruction",
    "trace trap",
    "iot instruction",
    "emt instruction",
    "floating point exception",
    "kill",
    "bus error",
    "segmentation violation",
    "bad argument to system call",
    "write on a pipe with no one to read it",
    "alarm clock",
    "software termination signal from kill",
    "status signal",
    "sendable stop signal not from tty",
    "stop signal from tty",
    "continue a stopped process",
    "child status has changed",
    "background read attempted from control tty",
    "background write attempted from control tty",
    "input record available at control tty",
    "exceeded CPU time limit",
    "exceeded file size limit"
    };
#endif /* not WINDOWSNT */
#endif
#endif /* VMS */
#endif /* ! SYS_SIGLIST_DECLARED */

/* t means use pty, nil means use a pipe,
   maybe other values to come.  */
static Lisp_Object Vprocess_connection_type;

#ifdef SKTPAIR
#ifndef HAVE_SOCKETS
#include <sys/socket.h>
#endif
#endif /* SKTPAIR */

/* These next two vars are non-static since sysdep.c uses them in the
   emulation of `select'.  */
/* Number of events of change of status of a process.  */
int process_tick;
/* Number of events for which the user or sentinel has been notified.  */
int update_tick;

#include "sysselect.h"

/* If we support a window system, turn on the code to poll periodically
   to detect C-g.  It isn't actually used when doing interrupt input.  */
#ifdef HAVE_WINDOW_SYSTEM
#define POLL_FOR_INPUT
#endif

/* Mask of bits indicating the descriptors that we wait for input on.  */

static SELECT_TYPE input_wait_mask;

/* Mask that excludes keyboard input descriptor (s).  */

static SELECT_TYPE non_keyboard_wait_mask;

/* The largest descriptor currently in use for a process object.  */
static int max_process_desc;

/* The largest descriptor currently in use for keyboard input.  */
static int max_keyboard_desc;

/* Nonzero means delete a process right away if it exits.  */
static int delete_exited_processes;

/* Indexed by descriptor, gives the process (if any) for that descriptor */
Lisp_Object chan_process[MAXDESC];

/* Alist of elements (NAME . PROCESS) */
Lisp_Object Vprocess_alist;

/* Buffered-ahead input char from process, indexed by channel.
   -1 means empty (no char is buffered).
   Used on sys V where the only way to tell if there is any
   output from the process is to read at least one char.
   Always -1 on systems that support FIONREAD.  */

/* Don't make static; need to access externally.  */
int proc_buffered_char[MAXDESC];

static Lisp_Object get_process ();

/* Maximum number of bytes to send to a pty without an eof.  */
static int pty_max_bytes;

#ifdef HAVE_PTYS
/* The file name of the pty opened by allocate_pty.  */

static char pty_name[24];
#endif

/* Compute the Lisp form of the process status, p->status, from
   the numeric status that was returned by `wait'.  */

Lisp_Object status_convert ();

update_status (p)
     struct Lisp_Process *p;
{
  union { int i; WAITTYPE wt; } u;
  u.i = XFASTINT (p->raw_status_low) + (XFASTINT (p->raw_status_high) << 16);
  p->status = status_convert (u.wt);
  p->raw_status_low = Qnil;
  p->raw_status_high = Qnil;
}

/*  Convert a process status word in Unix format to 
    the list that we use internally.  */

Lisp_Object
status_convert (w)
     WAITTYPE w;
{
  if (WIFSTOPPED (w))
    return Fcons (Qstop, Fcons (make_number (WSTOPSIG (w)), Qnil));
  else if (WIFEXITED (w))
    return Fcons (Qexit, Fcons (make_number (WRETCODE (w)),
				WCOREDUMP (w) ? Qt : Qnil));
  else if (WIFSIGNALED (w))
    return Fcons (Qsignal, Fcons (make_number (WTERMSIG (w)),
				  WCOREDUMP (w) ? Qt : Qnil));
  else
    return Qrun;
}

/* Given a status-list, extract the three pieces of information
   and store them individually through the three pointers.  */

void
decode_status (l, symbol, code, coredump)
     Lisp_Object l;
     Lisp_Object *symbol;
     int *code;
     int *coredump;
{
  Lisp_Object tem;

  if (SYMBOLP (l))
    {
      *symbol = l;
      *code = 0;
      *coredump = 0;
    }
  else
    {
      *symbol = XCONS (l)->car;
      tem = XCONS (l)->cdr;
      *code = XFASTINT (XCONS (tem)->car);
      tem = XCONS (tem)->cdr;
      *coredump = !NILP (tem);
    }
}

/* Return a string describing a process status list.  */

Lisp_Object 
status_message (status)
     Lisp_Object status;
{
  Lisp_Object symbol;
  int code, coredump;
  Lisp_Object string, string2;

  decode_status (status, &symbol, &code, &coredump);

  if (EQ (symbol, Qsignal) || EQ (symbol, Qstop))
    {
      char *signame = 0;
      if (code < NSIG)
	{
#ifndef VMS
	  /* Cast to suppress warning if the table has const char *.  */
	  signame = (char *) sys_siglist[code];
#else
	  signame = sys_errlist[code];
#endif
	}
      if (signame == 0)
	signame = "unknown";
      string = build_string (signame);
      string2 = build_string (coredump ? " (core dumped)\n" : "\n");
      XSTRING (string)->data[0] = DOWNCASE (XSTRING (string)->data[0]);
      return concat2 (string, string2);
    }
  else if (EQ (symbol, Qexit))
    {
      if (code == 0)
	return build_string ("finished\n");
      string = Fnumber_to_string (make_number (code));
      string2 = build_string (coredump ? " (core dumped)\n" : "\n");
      return concat2 (build_string ("exited abnormally with code "),
		      concat2 (string, string2));
    }
  else
    return Fcopy_sequence (Fsymbol_name (symbol));
}

#ifdef HAVE_PTYS

/* Open an available pty, returning a file descriptor.
   Return -1 on failure.
   The file name of the terminal corresponding to the pty
   is left in the variable pty_name.  */

int
allocate_pty ()
{
  struct stat stb;
  register c, i;
  int fd;

  /* Some systems name their pseudoterminals so that there are gaps in
     the usual sequence - for example, on HP9000/S700 systems, there
     are no pseudoterminals with names ending in 'f'.  So we wait for
     three failures in a row before deciding that we've reached the
     end of the ptys.  */
  int failed_count = 0;

#ifdef PTY_ITERATION
  PTY_ITERATION
#else
  for (c = FIRST_PTY_LETTER; c <= 'z'; c++)
    for (i = 0; i < 16; i++)
#endif
      {
#ifdef PTY_NAME_SPRINTF
	PTY_NAME_SPRINTF
#else
	sprintf (pty_name, "/dev/pty%c%x", c, i);
#endif /* no PTY_NAME_SPRINTF */

#ifdef PTY_OPEN
	PTY_OPEN;
#else /* no PTY_OPEN */
#ifdef IRIS
	/* Unusual IRIS code */
 	*ptyv = open ("/dev/ptc", O_RDWR | O_NDELAY, 0);
 	if (fd < 0)
 	  return -1;
	if (fstat (fd, &stb) < 0)
	  return -1;
#else /* not IRIS */
	if (stat (pty_name, &stb) < 0)
	  {
	    failed_count++;
	    if (failed_count >= 3)
	      return -1;
	  }
	else
	  failed_count = 0;
#ifdef O_NONBLOCK
	fd = open (pty_name, O_RDWR | O_NONBLOCK, 0);
#else
	fd = open (pty_name, O_RDWR | O_NDELAY, 0);
#endif
#endif /* not IRIS */
#endif /* no PTY_OPEN */

	if (fd >= 0)
	  {
	    /* check to make certain that both sides are available
	       this avoids a nasty yet stupid bug in rlogins */
#ifdef PTY_TTY_NAME_SPRINTF
	    PTY_TTY_NAME_SPRINTF
#else
            sprintf (pty_name, "/dev/tty%c%x", c, i);
#endif /* no PTY_TTY_NAME_SPRINTF */
#ifndef UNIPLUS
	    if (access (pty_name, 6) != 0)
	      {
		close (fd);
#if !defined(IRIS) && !defined(__sgi)
		continue;
#else
		return -1;
#endif /* IRIS */
	      }
#endif /* not UNIPLUS */
	    setup_pty (fd);
	    return fd;
	  }
      }
  return -1;
}
#endif /* HAVE_PTYS */

Lisp_Object
make_process (name)
     Lisp_Object name;
{
  struct Lisp_Vector *vec;
  register Lisp_Object val, tem, name1;
  register struct Lisp_Process *p;
  char suffix[10];
  register int i;

  vec = allocate_vectorlike ((EMACS_INT) VECSIZE (struct Lisp_Process));
  for (i = 0; i < VECSIZE (struct Lisp_Process); i++)
    vec->contents[i] = Qnil;
  vec->size = VECSIZE (struct Lisp_Process);
  p = (struct Lisp_Process *)vec;

  XSETINT (p->infd, -1);
  XSETINT (p->outfd, -1);
  XSETFASTINT (p->pid, 0);
  XSETFASTINT (p->tick, 0);
  XSETFASTINT (p->update_tick, 0);
  p->raw_status_low = Qnil;
  p->raw_status_high = Qnil;
  p->status = Qrun;
  p->mark = Fmake_marker ();

  /* If name is already in use, modify it until it is unused.  */

  name1 = name;
  for (i = 1; ; i++)
    {
      tem = Fget_process (name1);
      if (NILP (tem)) break;
      sprintf (suffix, "<%d>", i);
      name1 = concat2 (name, build_string (suffix));
    }
  name = name1;
  p->name = name;
  XSETPROCESS (val, p);
  Vprocess_alist = Fcons (Fcons (name, val), Vprocess_alist);
  return val;
}

remove_process (proc)
     register Lisp_Object proc;
{
  register Lisp_Object pair;

  pair = Frassq (proc, Vprocess_alist);
  Vprocess_alist = Fdelq (pair, Vprocess_alist);
  Fset_marker (XPROCESS (proc)->mark, Qnil, Qnil);

  deactivate_process (proc);
}

DEFUN ("processp", Fprocessp, Sprocessp, 1, 1, 0,
  "Return t if OBJECT is a process.")
  (obj)
     Lisp_Object obj;
{
  return PROCESSP (obj) ? Qt : Qnil;
}

DEFUN ("get-process", Fget_process, Sget_process, 1, 1, 0,
  "Return the process named NAME, or nil if there is none.")
  (name)
     register Lisp_Object name;
{
  if (PROCESSP (name))
    return name;
  CHECK_STRING (name, 0);
  return Fcdr (Fassoc (name, Vprocess_alist));
}

DEFUN ("get-buffer-process", Fget_buffer_process, Sget_buffer_process, 1, 1, 0,
  "Return the (or, a) process associated with BUFFER.\n\
BUFFER may be a buffer or the name of one.")
  (name)
     register Lisp_Object name;
{
  register Lisp_Object buf, tail, proc;

  if (NILP (name)) return Qnil;
  buf = Fget_buffer (name);
  if (NILP (buf)) return Qnil;

  for (tail = Vprocess_alist; !NILP (tail); tail = Fcdr (tail))
    {
      proc = Fcdr (Fcar (tail));
      if (PROCESSP (proc) && EQ (XPROCESS (proc)->buffer, buf))
	return proc;
    }
  return Qnil;
}

/* This is how commands for the user decode process arguments.  It
   accepts a process, a process name, a buffer, a buffer name, or nil.
   Buffers denote the first process in the buffer, and nil denotes the
   current buffer.  */

static Lisp_Object
get_process (name)
     register Lisp_Object name;
{
  register Lisp_Object proc, obj;
  if (STRINGP (name))
    {
      obj = Fget_process (name);
      if (NILP (obj))
	obj = Fget_buffer (name);
      if (NILP (obj))
	error ("Process %s does not exist", XSTRING (name)->data);
    }
  else if (NILP (name))
    obj = Fcurrent_buffer ();
  else
    obj = name;

  /* Now obj should be either a buffer object or a process object.
   */
  if (BUFFERP (obj))
    {
      proc = Fget_buffer_process (obj);
      if (NILP (proc))
	error ("Buffer %s has no process", XSTRING (XBUFFER (obj)->name)->data);
    }
  else
    {
      CHECK_PROCESS (obj, 0);
      proc = obj;
    }
  return proc;
}

DEFUN ("delete-process", Fdelete_process, Sdelete_process, 1, 1, 0,
  "Delete PROCESS: kill it and forget about it immediately.\n\
PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
nil, indicating the current buffer's process.")
  (proc)
     register Lisp_Object proc;
{
  proc = get_process (proc);
  XPROCESS (proc)->raw_status_low = Qnil;
  XPROCESS (proc)->raw_status_high = Qnil;
  if (NETCONN_P (proc))
    {
      XPROCESS (proc)->status = Fcons (Qexit, Fcons (make_number (0), Qnil));
      XSETINT (XPROCESS (proc)->tick, ++process_tick);
    }
  else if (XINT (XPROCESS (proc)->infd) >= 0)
    {
      Fkill_process (proc, Qnil);
      /* Do this now, since remove_process will make sigchld_handler do nothing.  */
      XPROCESS (proc)->status 
	= Fcons (Qsignal, Fcons (make_number (SIGKILL), Qnil));
      XSETINT (XPROCESS (proc)->tick, ++process_tick);
      status_notify ();
    }
  remove_process (proc);
  return Qnil;
}

DEFUN ("process-status", Fprocess_status, Sprocess_status, 1, 1, 0,
  "Return the status of PROCESS: a symbol, one of these:\n\
run  -- for a process that is running.\n\
stop -- for a process stopped but continuable.\n\
exit -- for a process that has exited.\n\
signal -- for a process that has got a fatal signal.\n\
open -- for a network stream connection that is open.\n\
closed -- for a network stream connection that is closed.\n\
nil -- if arg is a process name and no such process exists.\n\
PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
nil, indicating the current buffer's process.")
  (proc)
     register Lisp_Object proc;
{
  register struct Lisp_Process *p;
  register Lisp_Object status;

  if (STRINGP (proc))
    proc = Fget_process (proc);
  else
    proc = get_process (proc);

  if (NILP (proc))
    return proc;

  p = XPROCESS (proc);
  if (!NILP (p->raw_status_low))
    update_status (p);
  status = p->status;
  if (CONSP (status))
    status = XCONS (status)->car;
  if (NETCONN_P (proc))
    {
      if (EQ (status, Qrun))
	status = Qopen;
      else if (EQ (status, Qexit))
	status = Qclosed;
    }
  return status;
}

DEFUN ("process-exit-status", Fprocess_exit_status, Sprocess_exit_status,
       1, 1, 0,
  "Return the exit status of PROCESS or the signal number that killed it.\n\
If PROCESS has not yet exited or died, return 0.")
  (proc)
     register Lisp_Object proc;
{
  CHECK_PROCESS (proc, 0);
  if (!NILP (XPROCESS (proc)->raw_status_low))
    update_status (XPROCESS (proc));
  if (CONSP (XPROCESS (proc)->status))
    return XCONS (XCONS (XPROCESS (proc)->status)->cdr)->car;
  return make_number (0);
}

DEFUN ("process-id", Fprocess_id, Sprocess_id, 1, 1, 0,
  "Return the process id of PROCESS.\n\
This is the pid of the Unix process which PROCESS uses or talks to.\n\
For a network connection, this value is nil.")
  (proc)
     register Lisp_Object proc;
{
  CHECK_PROCESS (proc, 0);
  return XPROCESS (proc)->pid;
}

DEFUN ("process-name", Fprocess_name, Sprocess_name, 1, 1, 0,
  "Return the name of PROCESS, as a string.\n\
This is the name of the program invoked in PROCESS,\n\
possibly modified to make it unique among process names.")
  (proc)
     register Lisp_Object proc;
{
  CHECK_PROCESS (proc, 0);
  return XPROCESS (proc)->name;
}

DEFUN ("process-command", Fprocess_command, Sprocess_command, 1, 1, 0,
  "Return the command that was executed to start PROCESS.\n\
This is a list of strings, the first string being the program executed\n\
and the rest of the strings being the arguments given to it.\n\
For a non-child channel, this is nil.")
  (proc)
     register Lisp_Object proc;
{
  CHECK_PROCESS (proc, 0);
  return XPROCESS (proc)->command;
}

DEFUN ("process-tty-name", Fprocess_tty_name, Sprocess_tty_name, 1, 1, 0,
  "Return the name of the terminal PROCESS uses, or nil if none.\n\
This is the terminal that the process itself reads and writes on,\n\
not the name of the pty that Emacs uses to talk with that terminal.")
  (proc)
     register Lisp_Object proc;
{
  CHECK_PROCESS (proc, 0);
  return XPROCESS (proc)->tty_name;
}

DEFUN ("set-process-buffer", Fset_process_buffer, Sset_process_buffer,
  2, 2, 0,
  "Set buffer associated with PROCESS to BUFFER (a buffer, or nil).")
  (proc, buffer)
     register Lisp_Object proc, buffer;
{
  CHECK_PROCESS (proc, 0);
  if (!NILP (buffer))
    CHECK_BUFFER (buffer, 1);
  XPROCESS (proc)->buffer = buffer;
  return buffer;
}

DEFUN ("process-buffer", Fprocess_buffer, Sprocess_buffer,
  1, 1, 0,
  "Return the buffer PROCESS is associated with.\n\
Output from PROCESS is inserted in this buffer\n\
unless PROCESS has a filter.")
  (proc)
     register Lisp_Object proc;
{
  CHECK_PROCESS (proc, 0);
  return XPROCESS (proc)->buffer;
}

DEFUN ("process-mark", Fprocess_mark, Sprocess_mark,
  1, 1, 0,
  "Return the marker for the end of the last output from PROCESS.")
  (proc)
     register Lisp_Object proc;
{
  CHECK_PROCESS (proc, 0);
  return XPROCESS (proc)->mark;
}

DEFUN ("set-process-filter", Fset_process_filter, Sset_process_filter,
  2, 2, 0,
  "Give PROCESS the filter function FILTER; nil means no filter.\n\
t means stop accepting output from the process.\n\
When a process has a filter, each time it does output\n\
the entire string of output is passed to the filter.\n\
The filter gets two arguments: the process and the string of output.\n\
If the process has a filter, its buffer is not used for output.")
  (proc, filter)
     register Lisp_Object proc, filter;
{
  CHECK_PROCESS (proc, 0);
  if (EQ (filter, Qt))
    {
      FD_CLR (XINT (XPROCESS (proc)->infd), &input_wait_mask);
      FD_CLR (XINT (XPROCESS (proc)->infd), &non_keyboard_wait_mask);
    }
  else if (EQ (XPROCESS (proc)->filter, Qt))
    {
      FD_SET (XINT (XPROCESS (proc)->infd), &input_wait_mask);
      FD_SET (XINT (XPROCESS (proc)->infd), &non_keyboard_wait_mask);
    }
  XPROCESS (proc)->filter = filter;
  return filter;
}

DEFUN ("process-filter", Fprocess_filter, Sprocess_filter,
  1, 1, 0,
  "Returns the filter function of PROCESS; nil if none.\n\
See `set-process-filter' for more info on filter functions.")
  (proc)
     register Lisp_Object proc;
{
  CHECK_PROCESS (proc, 0);
  return XPROCESS (proc)->filter;
}

DEFUN ("set-process-sentinel", Fset_process_sentinel, Sset_process_sentinel,
  2, 2, 0,
  "Give PROCESS the sentinel SENTINEL; nil for none.\n\
The sentinel is called as a function when the process changes state.\n\
It gets two arguments: the process, and a string describing the change.")
  (proc, sentinel)
     register Lisp_Object proc, sentinel;
{
  CHECK_PROCESS (proc, 0);
  XPROCESS (proc)->sentinel = sentinel;
  return sentinel;
}

DEFUN ("process-sentinel", Fprocess_sentinel, Sprocess_sentinel,
  1, 1, 0,
  "Return the sentinel of PROCESS; nil if none.\n\
See `set-process-sentinel' for more info on sentinels.")
  (proc)
     register Lisp_Object proc;
{
  CHECK_PROCESS (proc, 0);
  return XPROCESS (proc)->sentinel;
}

DEFUN ("set-process-window-size", Fset_process_window_size,
  Sset_process_window_size, 3, 3, 0,
  "Tell PROCESS that it has logical window size HEIGHT and WIDTH.")
  (proc, height, width)
     register Lisp_Object proc, height, width;
{
  CHECK_PROCESS (proc, 0);
  CHECK_NATNUM (height, 0);
  CHECK_NATNUM (width, 0);
  if (set_window_size (XINT (XPROCESS (proc)->infd),
		       XINT (height), XINT(width)) <= 0)
    return Qnil;
  else
    return Qt;
}

DEFUN ("process-kill-without-query", Fprocess_kill_without_query,
  Sprocess_kill_without_query, 1, 2, 0,
  "Say no query needed if PROCESS is running when Emacs is exited.\n\
Optional second argument if non-nil says to require a query.\n\
Value is t if a query was formerly required.")
  (proc, value)
     register Lisp_Object proc, value;
{
  Lisp_Object tem;

  CHECK_PROCESS (proc, 0);
  tem = XPROCESS (proc)->kill_without_query;
  XPROCESS (proc)->kill_without_query = Fnull (value);

  return Fnull (tem);
}

#if 0 /* Turned off because we don't currently record this info
	 in the process.  Perhaps add it.  */
DEFUN ("process-connection", Fprocess_connection, Sprocess_connection, 1, 1, 0,
 "Return the connection type of `PROCESS'.\n\
The value is `nil' for a pipe,\n\
`t' or `pty' for a pty, or `stream' for a socket connection.")
  (process)
     Lisp_Object process;
{
  return XPROCESS (process)->type;
}
#endif

Lisp_Object
list_processes_1 ()
{
  register Lisp_Object tail, tem;
  Lisp_Object proc, minspace, tem1;
  register struct buffer *old = current_buffer;
  register struct Lisp_Process *p;
  register int state;
  char tembuf[80];

  XSETFASTINT (minspace, 1);

  set_buffer_internal (XBUFFER (Vstandard_output));
  Fbuffer_disable_undo (Vstandard_output);

  current_buffer->truncate_lines = Qt;

  write_string ("\
Proc         Status   Buffer         Tty         Command\n\
----         ------   ------         ---         -------\n", -1);

  for (tail = Vprocess_alist; !NILP (tail); tail = Fcdr (tail))
    {
      Lisp_Object symbol;

      proc = Fcdr (Fcar (tail));
      p = XPROCESS (proc);
      if (NILP (p->childp))
	continue;

      Finsert (1, &p->name);
      Findent_to (make_number (13), minspace);

      if (!NILP (p->raw_status_low))
	update_status (p);
      symbol = p->status;
      if (CONSP (p->status))
	symbol = XCONS (p->status)->car;

      
      if (EQ (symbol, Qsignal))
	{
	  Lisp_Object tem;
	  tem = Fcar (Fcdr (p->status));
#ifdef VMS
	  if (XINT (tem) < NSIG)
	    write_string (sys_errlist [XINT (tem)], -1);
	  else
#endif
	    Fprinc (symbol, Qnil);
	}
      else if (NETCONN_P (proc))
	{
	  if (EQ (symbol, Qrun))
	    write_string ("open", -1);
	  else if (EQ (symbol, Qexit))
	    write_string ("closed", -1);
	  else
	    Fprinc (symbol, Qnil);
	}
      else
	Fprinc (symbol, Qnil);

      if (EQ (symbol, Qexit))
	{
	  Lisp_Object tem;
	  tem = Fcar (Fcdr (p->status));
	  if (XFASTINT (tem))
	    {
	      sprintf (tembuf, " %d", (int) XFASTINT (tem));
	      write_string (tembuf, -1);
	    }
	}

      if (EQ (symbol, Qsignal) || EQ (symbol, Qexit))
	remove_process (proc);

      Findent_to (make_number (22), minspace);
      if (NILP (p->buffer))
	insert_string ("(none)");
      else if (NILP (XBUFFER (p->buffer)->name))
	insert_string ("(Killed)");
      else
	Finsert (1, &XBUFFER (p->buffer)->name);

      Findent_to (make_number (37), minspace);

      if (STRINGP (p->tty_name))
	Finsert (1, &p->tty_name);
      else
	insert_string ("(none)");

      Findent_to (make_number (49), minspace);

      if (NETCONN_P (proc))
        {
	  sprintf (tembuf, "(network stream connection to %s)\n",
		   XSTRING (p->childp)->data);
	  insert_string (tembuf);
        }
      else 
	{
	  tem = p->command;
	  while (1)
	    {
	      tem1 = Fcar (tem);
	      Finsert (1, &tem1);
	      tem = Fcdr (tem);
	      if (NILP (tem))
		break;
	      insert_string (" ");
	    }
	  insert_string ("\n");
       }
    }
  return Qnil;
}

DEFUN ("list-processes", Flist_processes, Slist_processes, 0, 0, "",
  "Display a list of all processes.\n\
\(Any processes listed as Exited or Signaled are actually eliminated\n\
after the listing is made.)")
  ()
{
  internal_with_output_to_temp_buffer ("*Process List*",
				       list_processes_1, Qnil);
  return Qnil;
}

DEFUN ("process-list", Fprocess_list, Sprocess_list, 0, 0, 0,
  "Return a list of all processes.")
  ()
{
  return Fmapcar (Qcdr, Vprocess_alist);
}

/* Starting asynchronous inferior processes.  */

static Lisp_Object start_process_unwind ();

DEFUN ("start-process", Fstart_process, Sstart_process, 3, MANY, 0,
  "Start a program in a subprocess.  Return the process object for it.\n\
Args are NAME BUFFER PROGRAM &rest PROGRAM-ARGS\n\
NAME is name for process.  It is modified if necessary to make it unique.\n\
BUFFER is the buffer or (buffer-name) to associate with the process.\n\
 Process output goes at end of that buffer, unless you specify\n\
 an output stream or filter function to handle the output.\n\
 BUFFER may be also nil, meaning that this process is not associated\n\
 with any buffer\n\
Third arg is program file name.  It is searched for as in the shell.\n\
Remaining arguments are strings to give program as arguments.")
  (nargs, args)
     int nargs;
     register Lisp_Object *args;
{
  Lisp_Object buffer, name, program, proc, current_dir, tem;
#ifdef VMS
  register unsigned char *new_argv;
  int len;
#else
  register unsigned char **new_argv;
#endif
  register int i;
  int count = specpdl_ptr - specpdl;

  buffer = args[1];
  if (!NILP (buffer))
    buffer = Fget_buffer_create (buffer);

  /* Make sure that the child will be able to chdir to the current
     buffer's current directory, or its unhandled equivalent.  We
     can't just have the child check for an error when it does the
     chdir, since it's in a vfork.

     We have to GCPRO around this because Fexpand_file_name and
     Funhandled_file_name_directory might call a file name handling
     function.  The argument list is protected by the caller, so all
     we really have to worry about is buffer.  */
  {
    struct gcpro gcpro1, gcpro2;

    current_dir = current_buffer->directory;

    GCPRO2 (buffer, current_dir);

    current_dir 
      = expand_and_dir_to_file (Funhandled_file_name_directory (current_dir),
				Qnil);
    if (NILP (Ffile_accessible_directory_p (current_dir)))
      report_file_error ("Setting current directory",
			 Fcons (current_buffer->directory, Qnil));

    UNGCPRO;
  }

  name = args[0];
  CHECK_STRING (name, 0);

  program = args[2];

  CHECK_STRING (program, 2);

#ifdef VMS
  /* Make a one member argv with all args concatenated
     together separated by a blank.  */
  len = XSTRING (program)->size + 2;
  for (i = 3; i < nargs; i++)
    {
      tem = args[i];
      CHECK_STRING (tem, i);
      len += XSTRING (tem)->size + 1;	/* count the blank */
    }
  new_argv = (unsigned char *) alloca (len);
  strcpy (new_argv, XSTRING (program)->data);
  for (i = 3; i < nargs; i++)
    {
      tem = args[i];
      CHECK_STRING (tem, i);
      strcat (new_argv, " ");
      strcat (new_argv, XSTRING (tem)->data);
    }
  /* Need to add code here to check for program existence on VMS */
  
#else /* not VMS */
  new_argv = (unsigned char **) alloca ((nargs - 1) * sizeof (char *));

  /* If program file name is not absolute, search our path for it */
  if (!IS_DIRECTORY_SEP (XSTRING (program)->data[0])
      && !(XSTRING (program)->size > 1
	   && IS_DEVICE_SEP (XSTRING (program)->data[1])))
    {
      struct gcpro gcpro1, gcpro2, gcpro3, gcpro4;

      tem = Qnil;
      GCPRO4 (name, program, buffer, current_dir);
      openp (Vexec_path, program, EXEC_SUFFIXES, &tem, 1);
      UNGCPRO;
      if (NILP (tem))
	report_file_error ("Searching for program", Fcons (program, Qnil));
      tem = Fexpand_file_name (tem, Qnil);
      new_argv[0] = XSTRING (tem)->data;
    }
  else
    {
      if (!NILP (Ffile_directory_p (program)))
	error ("Specified program for new process is a directory");

      new_argv[0] = XSTRING (program)->data;
    }

  for (i = 3; i < nargs; i++)
    {
      tem = args[i];
      CHECK_STRING (tem, i);
      new_argv[i - 2] = XSTRING (tem)->data;
    }
  new_argv[i - 2] = 0;
#endif /* not VMS */

  proc = make_process (name);
  /* If an error occurs and we can't start the process, we want to
     remove it from the process list.  This means that each error
     check in create_process doesn't need to call remove_process
     itself; it's all taken care of here.  */
  record_unwind_protect (start_process_unwind, proc);

  XPROCESS (proc)->childp = Qt;
  XPROCESS (proc)->command_channel_p = Qnil;
  XPROCESS (proc)->buffer = buffer;
  XPROCESS (proc)->sentinel = Qnil;
  XPROCESS (proc)->filter = Qnil;
  XPROCESS (proc)->command = Flist (nargs - 2, args + 2);

  /* Make the process marker point into the process buffer (if any).  */
  if (!NILP (buffer))
    Fset_marker (XPROCESS (proc)->mark,
		 make_number (BUF_ZV (XBUFFER (buffer))), buffer);

  create_process (proc, new_argv, current_dir);

  return unbind_to (count, proc);
}

/* This function is the unwind_protect form for Fstart_process.  If
   PROC doesn't have its pid set, then we know someone has signalled
   an error and the process wasn't started successfully, so we should
   remove it from the process list.  */
static Lisp_Object
start_process_unwind (proc)
     Lisp_Object proc;
{
  if (!PROCESSP (proc))
    abort ();

  /* Was PROC started successfully?  */
  if (XINT (XPROCESS (proc)->pid) <= 0)
    remove_process (proc);

  return Qnil;
}


SIGTYPE
create_process_1 (signo)
     int signo;
{
#ifdef USG
  /* USG systems forget handlers when they are used;
     must reestablish each time */
  signal (signo, create_process_1);
#endif /* USG */
}

#if 0  /* This doesn't work; see the note before sigchld_handler.  */
#ifdef USG
#ifdef SIGCHLD
/* Mimic blocking of signals on system V, which doesn't really have it.  */

/* Nonzero means we got a SIGCHLD when it was supposed to be blocked.  */
int sigchld_deferred;

SIGTYPE
create_process_sigchld ()
{
  signal (SIGCHLD, create_process_sigchld);

  sigchld_deferred = 1;
}
#endif
#endif
#endif

#ifndef VMS /* VMS version of this function is in vmsproc.c.  */
create_process (process, new_argv, current_dir)
     Lisp_Object process;
     char **new_argv;
     Lisp_Object current_dir;
{
  int pid, inchannel, outchannel;
  int sv[2];
#ifdef POSIX_SIGNALS
  sigset_t procmask;
  sigset_t blocked;
  struct sigaction sigint_action;
  struct sigaction sigquit_action;
#ifdef AIX
  struct sigaction sighup_action;
#endif
#else /* !POSIX_SIGNALS */
#ifdef SIGCHLD
  SIGTYPE (*sigchld)();
#endif
#endif /* !POSIX_SIGNALS */
  /* Use volatile to protect variables from being clobbered by longjmp.  */
  volatile int forkin, forkout;
  volatile int pty_flag = 0;
  extern char **environ;

  inchannel = outchannel = -1;

#ifdef HAVE_PTYS
  if (!NILP (Vprocess_connection_type))
    outchannel = inchannel = allocate_pty ();

  if (inchannel >= 0)
    {
#ifndef USG 
      /* On USG systems it does not work to open the pty's tty here
	       and then close and reopen it in the child.  */
#ifdef O_NOCTTY
      /* Don't let this terminal become our controlling terminal
	 (in case we don't have one).  */
      forkout = forkin = open (pty_name, O_RDWR | O_NOCTTY, 0);
#else
      forkout = forkin = open (pty_name, O_RDWR, 0);
#endif
      if (forkin < 0)
	report_file_error ("Opening pty", Qnil);
#else
      forkin = forkout = -1;
#endif /* not USG */
      pty_flag = 1;
    }
  else
#endif /* HAVE_PTYS */
#ifdef SKTPAIR
    {
      if (socketpair (AF_UNIX, SOCK_STREAM, 0, sv) < 0)
	report_file_error ("Opening socketpair", Qnil);
      outchannel = inchannel = sv[0];
      forkout = forkin = sv[1];
    }
#else /* not SKTPAIR */
    {
#ifdef WINDOWSNT
      pipe_with_inherited_out (sv);
      inchannel = sv[0];
      forkout = sv[1];

      pipe_with_inherited_in (sv);
      forkin = sv[0];
      outchannel = sv[1];
#else /* not WINDOWSNT */
      pipe (sv);
      inchannel = sv[0];
      forkout = sv[1];
      pipe (sv);
      outchannel = sv[1];
      forkin = sv[0];
#endif /* not WINDOWSNT */
    }
#endif /* not SKTPAIR */

#if 0
  /* Replaced by close_process_descs */
  set_exclusive_use (inchannel);
  set_exclusive_use (outchannel);
#endif

/* Stride people say it's a mystery why this is needed
   as well as the O_NDELAY, but that it fails without this.  */
#if defined (STRIDE) || (defined (pfa) && defined (HAVE_PTYS))
  {
    int one = 1;
    ioctl (inchannel, FIONBIO, &one);
  }
#endif

#ifdef O_NONBLOCK
  fcntl (inchannel, F_SETFL, O_NONBLOCK);
#else
#ifdef O_NDELAY
  fcntl (inchannel, F_SETFL, O_NDELAY);
#endif
#endif

  /* Record this as an active process, with its channels.
     As a result, child_setup will close Emacs's side of the pipes.  */
  chan_process[inchannel] = process;
  XSETINT (XPROCESS (process)->infd, inchannel);
  XSETINT (XPROCESS (process)->outfd, outchannel);
  /* Record the tty descriptor used in the subprocess.  */
  if (forkin < 0)
    XPROCESS (process)->subtty = Qnil;
  else
    XSETFASTINT (XPROCESS (process)->subtty, forkin);
  XPROCESS (process)->pty_flag = (pty_flag ? Qt : Qnil);
  XPROCESS (process)->status = Qrun;

  /* Delay interrupts until we have a chance to store
     the new fork's pid in its process structure */
#ifdef POSIX_SIGNALS
  sigemptyset (&blocked);
#ifdef SIGCHLD
  sigaddset (&blocked, SIGCHLD);
#endif
#ifdef HAVE_VFORK
  /* On many hosts (e.g. Solaris 2.4), if a vforked child calls `signal',
     this sets the parent's signal handlers as well as the child's.
     So delay all interrupts whose handlers the child might munge,
     and record the current handlers so they can be restored later.  */
  sigaddset (&blocked, SIGINT );  sigaction (SIGINT , 0, &sigint_action );
  sigaddset (&blocked, SIGQUIT);  sigaction (SIGQUIT, 0, &sigquit_action);
#ifdef AIX
  sigaddset (&blocked, SIGHUP );  sigaction (SIGHUP , 0, &sighup_action );
#endif
#endif /* HAVE_VFORK */
  sigprocmask (SIG_BLOCK, &blocked, &procmask);
#else /* !POSIX_SIGNALS */
#ifdef SIGCHLD
#ifdef BSD4_1
  sighold (SIGCHLD);
#else /* not BSD4_1 */
#if defined (BSD) || defined (UNIPLUS) || defined (HPUX)
  sigsetmask (sigmask (SIGCHLD));
#else /* ordinary USG */
#if 0
  sigchld_deferred = 0;
  sigchld = signal (SIGCHLD, create_process_sigchld);
#endif
#endif /* ordinary USG */
#endif /* not BSD4_1 */
#endif /* SIGCHLD */
#endif /* !POSIX_SIGNALS */

  FD_SET (inchannel, &input_wait_mask);
  FD_SET (inchannel, &non_keyboard_wait_mask);
  if (inchannel > max_process_desc)
    max_process_desc = inchannel;

  /* Until we store the proper pid, enable sigchld_handler
     to recognize an unknown pid as standing for this process.
     It is very important not to let this `marker' value stay
     in the table after this function has returned; if it does
     it might cause call-process to hang and subsequent asynchronous
     processes to get their return values scrambled.  */
  XSETINT (XPROCESS (process)->pid, -1);

  {
    /* child_setup must clobber environ on systems with true vfork.
       Protect it from permanent change.  */
    char **save_environ = environ;

#ifndef WINDOWSNT
    pid = vfork ();
    if (pid == 0)
#endif /* not WINDOWSNT */
      {
	int xforkin = forkin;
	int xforkout = forkout;

#if 0 /* This was probably a mistake--it duplicates code later on,
	 but fails to handle all the cases.  */
	/* Make sure SIGCHLD is not blocked in the child.  */
	sigsetmask (SIGEMPTYMASK);
#endif

	/* Make the pty be the controlling terminal of the process.  */
#ifdef HAVE_PTYS
	/* First, disconnect its current controlling terminal.  */
#ifdef HAVE_SETSID
	/* We tried doing setsid only if pty_flag, but it caused
	   process_set_signal to fail on SGI when using a pipe.  */
	setsid ();
	/* Make the pty's terminal the controlling terminal.  */
	if (pty_flag)
	  {
#ifdef TIOCSCTTY
	    /* We ignore the return value
	       because faith@cs.unc.edu says that is necessary on Linux.  */
	    ioctl (xforkin, TIOCSCTTY, 0);
#endif
	  }
#else /* not HAVE_SETSID */
#ifdef USG
	/* It's very important to call setpgrp here and no time
	   afterwards.  Otherwise, we lose our controlling tty which
	   is set when we open the pty. */
	setpgrp ();
#endif /* USG */
#endif /* not HAVE_SETSID */
#if defined (HAVE_TERMIOS) && defined (LDISC1)
	if (pty_flag && xforkin >= 0)
	  {
	    struct termios t;
	    tcgetattr (xforkin, &t);
	    t.c_lflag = LDISC1;
	    if (tcsetattr (xforkin, TCSANOW, &t) < 0)
	      write (1, "create_process/tcsetattr LDISC1 failed\n", 39);
	  }
#else
#if defined (NTTYDISC) && defined (TIOCSETD)
	if (pty_flag && xforkin >= 0)
	  {
	    /* Use new line discipline.  */
	    int ldisc = NTTYDISC;
	    ioctl (xforkin, TIOCSETD, &ldisc);
	  }
#endif
#endif
#ifdef TIOCNOTTY 
	/* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you
	   can do TIOCSPGRP only to the process's controlling tty.  */
	if (pty_flag)
	  {
	    /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here? 
	       I can't test it since I don't have 4.3.  */
	    int j = open ("/dev/tty", O_RDWR, 0);
	    ioctl (j, TIOCNOTTY, 0);
	    close (j);
#ifndef USG
	    /* In order to get a controlling terminal on some versions
	       of BSD, it is necessary to put the process in pgrp 0
	       before it opens the terminal.  */
#ifdef OSF1
	    setpgid (0, 0);
#else
	    setpgrp (0, 0);
#endif
#endif
	  }
#endif /* TIOCNOTTY */

#if !defined (RTU) && !defined (UNIPLUS)
/*** There is a suggestion that this ought to be a
     conditional on TIOCSPGRP.  */
	/* Now close the pty (if we had it open) and reopen it.
	   This makes the pty the controlling terminal of the subprocess.  */
	if (pty_flag)
	  {
#ifdef SET_CHILD_PTY_PGRP
	    int pgrp = getpid ();
#endif

	    /* I wonder if close (open (pty_name, ...)) would work?  */
	    if (xforkin >= 0)
	      close (xforkin);
	    xforkout = xforkin = open (pty_name, O_RDWR, 0);

	    if (xforkin < 0)
	      {
		write (1, "Couldn't open the pty terminal ", 31);
		write (1, pty_name, strlen (pty_name));
		write (1, "\n", 1);
		_exit (1);
	      }

#ifdef SET_CHILD_PTY_PGRP
	    ioctl (xforkin, TIOCSPGRP, &pgrp);
	    ioctl (xforkout, TIOCSPGRP, &pgrp);
#endif
	  }
#endif /* not UNIPLUS and not RTU */
#ifdef SETUP_SLAVE_PTY
	if (pty_flag)
	  {
	    SETUP_SLAVE_PTY;
	  }
#endif /* SETUP_SLAVE_PTY */
#ifdef AIX
	/* On AIX, we've disabled SIGHUP above once we start a child on a pty.
	   Now reenable it in the child, so it will die when we want it to.  */
	if (pty_flag)
	  signal (SIGHUP, SIG_DFL);
#endif
#endif /* HAVE_PTYS */

	signal (SIGINT, SIG_DFL);
	signal (SIGQUIT, SIG_DFL);

	/* Stop blocking signals in the child.  */
#ifdef POSIX_SIGNALS
	sigprocmask (SIG_SETMASK, &procmask, 0);
#else /* !POSIX_SIGNALS */
#ifdef SIGCHLD
#ifdef BSD4_1
	sigrelse (SIGCHLD);
#else /* not BSD4_1 */
#if defined (BSD) || defined (UNIPLUS) || defined (HPUX)
	sigsetmask (SIGEMPTYMASK);
#else /* ordinary USG */
#if 0
	signal (SIGCHLD, sigchld);
#endif
#endif /* ordinary USG */
#endif /* not BSD4_1 */
#endif /* SIGCHLD */
#endif /* !POSIX_SIGNALS */

	if (pty_flag)
	  child_setup_tty (xforkout);
#ifdef WINDOWSNT
	pid = child_setup (xforkin, xforkout, xforkout,
			   new_argv, 1, current_dir);
#else  /* not WINDOWSNT */	
	child_setup (xforkin, xforkout, xforkout,
		     new_argv, 1, current_dir);
#endif /* not WINDOWSNT */
      }
    environ = save_environ;
  }

  if (pid < 0)
    {
      if (forkin >= 0)
	close (forkin);
      if (forkin != forkout && forkout >= 0)
	close (forkout);
      report_file_error ("Doing vfork", Qnil);
    }
  
  XSETFASTINT (XPROCESS (process)->pid, pid);

#ifdef WINDOWSNT
  register_child (pid, inchannel);
#endif /* WINDOWSNT */

  /* If the subfork execv fails, and it exits,
     this close hangs.  I don't know why.
     So have an interrupt jar it loose.  */
  stop_polling ();
  signal (SIGALRM, create_process_1);
  alarm (1);
  XPROCESS (process)->subtty = Qnil;
  if (forkin >= 0)
    close (forkin);
  alarm (0);
  start_polling ();
  if (forkin != forkout && forkout >= 0)
    close (forkout);

#ifdef HAVE_PTYS
  if (pty_flag)
    XPROCESS (process)->tty_name = build_string (pty_name);
  else
#endif
    XPROCESS (process)->tty_name = Qnil;

#ifdef POSIX_SIGNALS
#ifdef HAVE_VFORK
  /* Restore the parent's signal handlers.  */
  sigaction (SIGINT, &sigint_action, 0);
  sigaction (SIGQUIT, &sigquit_action, 0);
#ifdef AIX
  sigaction (SIGHUP, &sighup_action, 0);
#endif
#endif /* HAVE_VFORK */
  /* Stop blocking signals in the parent.  */
  sigprocmask (SIG_SETMASK, &procmask, 0);
#else /* !POSIX_SIGNALS */
#ifdef SIGCHLD
#ifdef BSD4_1
  sigrelse (SIGCHLD);
#else /* not BSD4_1 */
#if defined (BSD) || defined (UNIPLUS) || defined (HPUX)
  sigsetmask (SIGEMPTYMASK);
#else /* ordinary USG */
#if 0
  signal (SIGCHLD, sigchld);
  /* Now really handle any of these signals
     that came in during this function.  */
  if (sigchld_deferred)
    kill (getpid (), SIGCHLD);
#endif
#endif /* ordinary USG */
#endif /* not BSD4_1 */
#endif /* SIGCHLD */
#endif /* !POSIX_SIGNALS */
}
#endif /* not VMS */

#ifdef HAVE_SOCKETS

/* open a TCP network connection to a given HOST/SERVICE.  Treated
   exactly like a normal process when reading and writing.  Only
   differences are in status display and process deletion.  A network
   connection has no PID; you cannot signal it.  All you can do is
   deactivate and close it via delete-process */

DEFUN ("open-network-stream", Fopen_network_stream, Sopen_network_stream, 
       4, 4, 0, 
  "Open a TCP connection for a service to a host.\n\
Returns a subprocess-object to represent the connection.\n\
Input and output work as for subprocesses; `delete-process' closes it.\n\
Args are NAME BUFFER HOST SERVICE.\n\
NAME is name for process.  It is modified if necessary to make it unique.\n\
BUFFER is the buffer (or buffer-name) to associate with the process.\n\
 Process output goes at end of that buffer, unless you specify\n\
 an output stream or filter function to handle the output.\n\
 BUFFER may be also nil, meaning that this process is not associated\n\
 with any buffer\n\
Third arg is name of the host to connect to, or its IP address.\n\
Fourth arg SERVICE is name of the service desired, or an integer\n\
 specifying a port number to connect to.")
   (name, buffer, host, service)
      Lisp_Object name, buffer, host, service;
{
  Lisp_Object proc;
  register int i;
  struct sockaddr_in address;
  struct servent *svc_info;
  struct hostent *host_info_ptr, host_info;
  char *(addr_list[2]);
  IN_ADDR numeric_addr;
  int s, outch, inch;
  char errstring[80];
  int port;
  struct hostent host_info_fixed;
  struct gcpro gcpro1, gcpro2, gcpro3, gcpro4;
  int retry = 0;
  int count = specpdl_ptr - specpdl;

  GCPRO4 (name, buffer, host, service);
  CHECK_STRING (name, 0);
  CHECK_STRING (host, 0);
  if (INTEGERP (service))
    port = htons ((unsigned short) XINT (service));
  else
    {
      CHECK_STRING (service, 0);
      svc_info = getservbyname (XSTRING (service)->data, "tcp");
      if (svc_info == 0)
	error ("Unknown service \"%s\"", XSTRING (service)->data);
      port = svc_info->s_port;
    }

  /* Slow down polling to every ten seconds.
     Some kernels have a bug which causes retrying connect to fail
     after a connect.  Polling can interfere with gethostbyname too.  */
#ifdef POLL_FOR_INPUT
  bind_polling_period (10);
#endif

#ifndef TERM
  while (1)
    {
#ifdef TRY_AGAIN
      h_errno = 0;
#endif
      host_info_ptr = gethostbyname (XSTRING (host)->data);
#ifdef TRY_AGAIN
      if (! (host_info_ptr == 0 && h_errno == TRY_AGAIN))
#endif
	break;
      Fsleep_for (make_number (1), Qnil);
    }
  if (host_info_ptr == 0)
    /* Attempt to interpret host as numeric inet address */
    {
      numeric_addr = inet_addr ((char *) XSTRING (host)->data);
      if (NUMERIC_ADDR_ERROR)
	error ("Unknown host \"%s\"", XSTRING (host)->data);

      host_info_ptr = &host_info;
      host_info.h_name = 0;
      host_info.h_aliases = 0;
      host_info.h_addrtype = AF_INET;
#ifdef h_addr
      /* Older machines have only one address slot called h_addr.
	 Newer machines have h_addr_list, but #define h_addr to
	 be its first element.  */
      host_info.h_addr_list = &(addr_list[0]);
#endif
      host_info.h_addr = (char*)(&numeric_addr);
      addr_list[1] = 0;
      host_info.h_length = strlen (addr_list[0]);
    }

  bzero (&address, sizeof address);
  bcopy (host_info_ptr->h_addr, (char *) &address.sin_addr,
	 host_info_ptr->h_length);
  address.sin_family = host_info_ptr->h_addrtype;
  address.sin_port = port;

  s = socket (host_info_ptr->h_addrtype, SOCK_STREAM, 0);
  if (s < 0) 
    report_file_error ("error creating socket", Fcons (name, Qnil));

  /* Kernel bugs (on Ultrix at least) cause lossage (not just EINTR)
     when connect is interrupted.  So let's not let it get interrupted.
     Note we do not turn off polling, because polling is only used
     when not interrupt_input, and thus not normally used on the systems
     which have this bug.  On systems which use polling, there's no way
     to quit if polling is turned off.  */
  if (interrupt_input)
    unrequest_sigio ();

 loop:
  if (connect (s, (struct sockaddr *) &address, sizeof address) == -1
      && errno != EISCONN)
    {
      int xerrno = errno;

      if (errno == EINTR)
	goto loop;
      if (errno == EADDRINUSE && retry < 20)
	{
	  /* A delay here is needed on some FreeBSD systems,
	     and it is harmless, since this retrying takes time anyway
	     and should be infrequent.  */
	  Fsleep_for (make_number (1), Qnil);
	  retry++;
	  goto loop;
	}

      close (s);

      if (interrupt_input)
	request_sigio ();

      errno = xerrno;
      report_file_error ("connection failed",
			 Fcons (host, Fcons (name, Qnil)));
    }

#ifdef POLL_FOR_INPUT
  unbind_to (count, Qnil);
#endif

  if (interrupt_input)
    request_sigio ();

#else /* TERM */
  s = connect_server (0);
  if (s < 0)
    report_file_error ("error creating socket", Fcons (name, Qnil));
  send_command (s, C_PORT, 0, "%s:%d", XSTRING (host)->data, ntohs (port));
  send_command (s, C_DUMB, 1, 0);
#endif /* TERM */

  inch = s;
  outch = dup (s);
  if (outch < 0) 
    report_file_error ("error duplicating socket", Fcons (name, Qnil));

  if (!NILP (buffer))
    buffer = Fget_buffer_create (buffer);
  proc = make_process (name);

  chan_process[inch] = proc;

#ifdef O_NONBLOCK
  fcntl (inch, F_SETFL, O_NONBLOCK);
#else
#ifdef O_NDELAY
  fcntl (inch, F_SETFL, O_NDELAY);
#endif
#endif

  XPROCESS (proc)->childp = host;
  XPROCESS (proc)->command_channel_p = Qnil;
  XPROCESS (proc)->buffer = buffer;
  XPROCESS (proc)->sentinel = Qnil;
  XPROCESS (proc)->filter = Qnil;
  XPROCESS (proc)->command = Qnil;
  XPROCESS (proc)->pid = Qnil;
  XSETINT (XPROCESS (proc)->infd, s);
  XSETINT (XPROCESS (proc)->outfd, outch);
  XPROCESS (proc)->status = Qrun;
  FD_SET (inch, &input_wait_mask);
  FD_SET (inch, &non_keyboard_wait_mask);
  if (inch > max_process_desc)
    max_process_desc = inch;

  UNGCPRO;
  return proc;
}
#endif	/* HAVE_SOCKETS */

deactivate_process (proc)
     Lisp_Object proc;
{
  register int inchannel, outchannel;
  register struct Lisp_Process *p = XPROCESS (proc);

  inchannel = XINT (p->infd);
  outchannel = XINT (p->outfd);

  if (inchannel >= 0)
    {
      /* Beware SIGCHLD hereabouts. */
      flush_pending_output (inchannel);
#ifdef VMS
      {
	VMS_PROC_STUFF *get_vms_process_pointer (), *vs;
	sys$dassgn (outchannel);
	vs = get_vms_process_pointer (p->pid);
	if (vs)
	  give_back_vms_process_stuff (vs);
      }
#else
      close (inchannel);
      if (outchannel >= 0 && outchannel != inchannel)
 	close (outchannel);
#endif

      XSETINT (p->infd, -1);
      XSETINT (p->outfd, -1);
      chan_process[inchannel] = Qnil;
      FD_CLR (inchannel, &input_wait_mask);
      FD_CLR (inchannel, &non_keyboard_wait_mask);
      if (inchannel == max_process_desc)
	{
	  int i;
	  /* We just closed the highest-numbered process input descriptor,
	     so recompute the highest-numbered one now.  */
	  max_process_desc = 0;
	  for (i = 0; i < MAXDESC; i++)
	    if (!NILP (chan_process[i]))
	      max_process_desc = i;
	}
    }
}

/* Close all descriptors currently in use for communication
   with subprocess.  This is used in a newly-forked subprocess
   to get rid of irrelevant descriptors.  */

close_process_descs ()
{
#ifndef WINDOWSNT
  int i;
  for (i = 0; i < MAXDESC; i++)
    {
      Lisp_Object process;
      process = chan_process[i];
      if (!NILP (process))
	{
	  int in = XINT (XPROCESS (process)->infd);
	  int out = XINT (XPROCESS (process)->outfd);
	  if (in >= 0)
	    close (in);
	  if (out >= 0 && in != out)
	    close (out);
	}
    }
#endif
}

DEFUN ("accept-process-output", Faccept_process_output, Saccept_process_output,
  0, 3, 0,
  "Allow any pending output from subprocesses to be read by Emacs.\n\
It is read into the process' buffers or given to their filter functions.\n\
Non-nil arg PROCESS means do not return until some output has been received\n\
from PROCESS.\n\
Non-nil second arg TIMEOUT and third arg TIMEOUT-MSECS are number of\n\
seconds and microseconds to wait; return after that much time whether\n\
or not there is input.\n\
Return non-nil iff we received any output before the timeout expired.")
  (proc, timeout, timeout_msecs)
     register Lisp_Object proc, timeout, timeout_msecs;
{
  int seconds;
  int useconds;

  if (! NILP (timeout_msecs))
    {
      CHECK_NUMBER (timeout_msecs, 2);
      useconds = XINT (timeout_msecs);
      if (!INTEGERP (timeout))
	XSETINT (timeout, 0);

      {
	int carry = useconds / 1000000;

	XSETINT (timeout, XINT (timeout) + carry);
	useconds -= carry * 1000000;

	/* I think this clause is necessary because C doesn't
	   guarantee a particular rounding direction for negative
	   integers.  */
	if (useconds < 0)
	  {
	    XSETINT (timeout, XINT (timeout) - 1);
	    useconds += 1000000;
	  }
      }
    }
  else
    useconds = 0;

  if (! NILP (timeout))
    {
      CHECK_NUMBER (timeout, 1);
      seconds = XINT (timeout);
      if (seconds <= 0)
	seconds = -1;
    }
  else
    {
      if (NILP (proc))
	seconds = -1;
      else
	seconds = 0;
    }

  if (NILP (proc))
    XSETFASTINT (proc, 0);

  return
    (wait_reading_process_input (seconds, useconds, proc, 0)
     ? Qt : Qnil);
}

/* This variable is different from waiting_for_input in keyboard.c.
   It is used to communicate to a lisp process-filter/sentinel (via the
   function Fwaiting_for_user_input_p below) whether emacs was waiting
   for user-input when that process-filter was called.
   waiting_for_input cannot be used as that is by definition 0 when
   lisp code is being evalled.
   This is also used in record_asynch_buffer_change.
   For that purpose, this must be 0
   when not inside wait_reading_process_input.  */
static int waiting_for_user_input_p;

/* Read and dispose of subprocess output while waiting for timeout to
   elapse and/or keyboard input to be available.

   TIME_LIMIT is:
     timeout in seconds, or
     zero for no limit, or
     -1 means gobble data immediately available but don't wait for any.

   MICROSECS is:
     an additional duration to wait, measured in microseconds.
     If this is nonzero and time_limit is 0, then the timeout
     consists of MICROSECS only.

   READ_KBD is a lisp value:
     0 to ignore keyboard input, or
     1 to return when input is available, or
     -1 meaning caller will actually read the input, so don't throw to
       the quit handler, or
     a cons cell, meaning wait until its car is non-nil
       (and gobble terminal input into the buffer if any arrives), or
     a process object, meaning wait until something arrives from that
       process.  The return value is true iff we read some input from
       that process.

   DO_DISPLAY != 0 means redisplay should be done to show subprocess
   output that arrives.

   If READ_KBD is a pointer to a struct Lisp_Process, then the
     function returns true iff we received input from that process
     before the timeout elapsed.
   Otherwise, return true iff we received input from any process.  */

wait_reading_process_input (time_limit, microsecs, read_kbd, do_display)
     int time_limit, microsecs;
     Lisp_Object read_kbd;
     int do_display;
{
  register int channel, nfds, m;
  static SELECT_TYPE Available;
  int xerrno;
  Lisp_Object proc;
  EMACS_TIME timeout, end_time, garbage;
  SELECT_TYPE Atemp;
  int wait_channel = -1;
  struct Lisp_Process *wait_proc = 0;
  int got_some_input = 0;
  Lisp_Object *wait_for_cell = 0;

  FD_ZERO (&Available);

  /* If read_kbd is a process to watch, set wait_proc and wait_channel
     accordingly.  */
  if (PROCESSP (read_kbd))
    {
      wait_proc = XPROCESS (read_kbd);
      wait_channel = XINT (wait_proc->infd);
      XSETFASTINT (read_kbd, 0);
    }

  /* If waiting for non-nil in a cell, record where.  */
  if (CONSP (read_kbd))
    {
      wait_for_cell = &XCONS (read_kbd)->car;
      XSETFASTINT (read_kbd, 0);
    }

  waiting_for_user_input_p = XINT (read_kbd);

  /* Since we may need to wait several times,
     compute the absolute time to return at.  */
  if (time_limit || microsecs)
    {
      EMACS_GET_TIME (end_time);
      EMACS_SET_SECS_USECS (timeout, time_limit, microsecs);
      EMACS_ADD_TIME (end_time, end_time, timeout);
    }

  while (1)
    {
      /* If calling from keyboard input, do not quit
	 since we want to return C-g as an input character.
	 Otherwise, do pending quit if requested.  */
      if (XINT (read_kbd) >= 0)
	QUIT;

      /* Exit now if the cell we're waiting for became non-nil.  */
      if (wait_for_cell && ! NILP (*wait_for_cell))
	break;

      /* Compute time from now till when time limit is up */
      /* Exit if already run out */
      if (time_limit == -1)
	{
	  /* -1 specified for timeout means
	     gobble output available now
	     but don't wait at all. */

	  EMACS_SET_SECS_USECS (timeout, 0, 0);
	}
      else if (time_limit || microsecs)
	{
	  EMACS_GET_TIME (timeout);
	  EMACS_SUB_TIME (timeout, end_time, timeout);
	  if (EMACS_TIME_NEG_P (timeout))
	    break;
	}
      else
	{
	  EMACS_SET_SECS_USECS (timeout, 100000, 0);
	}

      /* Cause C-g and alarm signals to take immediate action,
	 and cause input available signals to zero out timeout.

	 It is important that we do this before checking for process
	 activity.  If we get a SIGCHLD after the explicit checks for
	 process activity, timeout is the only way we will know.  */
      if (XINT (read_kbd) < 0)
	set_waiting_for_input (&timeout);

      /* If status of something has changed, and no input is
	 available, notify the user of the change right away.  After
	 this explicit check, we'll let the SIGCHLD handler zap
	 timeout to get our attention.  */
      if (update_tick != process_tick && do_display)
	{
	  Atemp = input_wait_mask;
	  EMACS_SET_SECS_USECS (timeout, 0, 0);
	  if ((select (MAXDESC, &Atemp, (SELECT_TYPE *)0, (SELECT_TYPE *)0,
		       &timeout)
	       <= 0))
	    {
	      /* It's okay for us to do this and then continue with
		 the loop, since timeout has already been zeroed out.  */
	      clear_waiting_for_input ();
	      status_notify ();
	    }
	}

      /* Don't wait for output from a non-running process.  */
      if (wait_proc != 0 && !NILP (wait_proc->raw_status_low))
	update_status (wait_proc);
      if (wait_proc != 0
	  && ! EQ (wait_proc->status, Qrun))
	{
	  clear_waiting_for_input ();
	  break;
	}

      /* Wait till there is something to do */

      if (! XINT (read_kbd) && wait_for_cell == 0)
	Available = non_keyboard_wait_mask;
      else
	Available = input_wait_mask;

      /* If frame size has changed or the window is newly mapped,
	 redisplay now, before we start to wait.  There is a race
	 condition here; if a SIGIO arrives between now and the select
	 and indicates that a frame is trashed, the select may block
	 displaying a trashed screen.  */
      if (frame_garbaged && do_display)
	{
	  clear_waiting_for_input ();
	  redisplay_preserve_echo_area ();
	  if (XINT (read_kbd) < 0)
	    set_waiting_for_input (&timeout);
	}

      if (XINT (read_kbd) && detect_input_pending ())
	{
	  nfds = 0;
	  FD_ZERO (&Available);
	}
      else
	nfds = select (MAXDESC, &Available, (SELECT_TYPE *)0, (SELECT_TYPE *)0,
		       &timeout);

      xerrno = errno;

      /* Make C-g and alarm signals set flags again */
      clear_waiting_for_input ();

      /*  If we woke up due to SIGWINCH, actually change size now.  */
      do_pending_window_change ();

      if (time_limit && nfds == 0) /* timeout elapsed */
	break;
      if (nfds < 0)
	{
	  if (xerrno == EINTR)
	    FD_ZERO (&Available);
#ifdef ultrix
	  /* Ultrix select seems to return ENOMEM when it is
	     interrupted.  Treat it just like EINTR.  Bleah.  Note
	     that we want to test for the "ultrix" CPP symbol, not
	     "__ultrix__"; the latter is only defined under GCC, but
	     not by DEC's bundled CC.  -JimB  */
	  else if (xerrno == ENOMEM)
	    FD_ZERO (&Available);
#endif
#ifdef ALLIANT
	  /* This happens for no known reason on ALLIANT.
	     I am guessing that this is the right response. -- RMS.  */
	  else if (xerrno == EFAULT)
	    FD_ZERO (&Available);
#endif
	  else if (xerrno == EBADF)
	    {
#ifdef AIX
	      /* AIX doesn't handle PTY closure the same way BSD does.  On AIX,
		 the child's closure of the pts gives the parent a SIGHUP, and
		 the ptc file descriptor is automatically closed,
		 yielding EBADF here or at select() call above.
		 So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF
		 in m/ibmrt-aix.h), and here we just ignore the select error.
		 Cleanup occurs c/o status_notify after SIGCLD. */
	      FD_ZERO (&Available); /* Cannot depend on values returned */
#else
	      abort ();
#endif
	    }
	  else
	    error("select error: %s", strerror (xerrno));
	}
#if defined(sun) && !defined(USG5_4)
      else if (nfds > 0 && keyboard_bit_set (&Available)
	       && interrupt_input)
	/* System sometimes fails to deliver SIGIO.

	   David J. Mackenzie says that Emacs doesn't compile under
	   Solaris if this code is enabled, thus the USG5_4 in the CPP
	   conditional.  "I haven't noticed any ill effects so far.
	   If you find a Solaris expert somewhere, they might know
	   better." */
	kill (getpid (), SIGIO);
#endif

      /* Check for keyboard input */
      /* If there is any, return immediately
	 to give it higher priority than subprocesses */

      /* We used to do this if wait_for_cell,
	 but that caused infinite recursion in selection request events.  */
      if ((XINT (read_kbd) || wait_for_cell)
	  && detect_input_pending ())
	{
	  swallow_events ();
	  if (detect_input_pending ())
	    break;
	}

      /* Exit now if the cell we're waiting for became non-nil.  */
      if (wait_for_cell && ! NILP (*wait_for_cell))
	break;

#ifdef SIGIO
      /* If we think we have keyboard input waiting, but didn't get SIGIO
	 go read it.  This can happen with X on BSD after logging out.
	 In that case, there really is no input and no SIGIO,
	 but select says there is input.  */

      if (XINT (read_kbd) && interrupt_input
	  && (keyboard_bit_set (&Available)))
	kill (0, SIGIO);
#endif

      if (! wait_proc)
	got_some_input |= nfds > 0;

      /* If checking input just got us a size-change event from X,
	 obey it now if we should.  */
      if (XINT (read_kbd) || wait_for_cell)
	do_pending_window_change ();

      /* Check for data from a process.  */
      /* Really FIRST_PROC_DESC should be 0 on Unix,
	 but this is safer in the short run.  */
      for (channel = 0; channel <= max_process_desc; channel++)
	{
	  if (FD_ISSET (channel, &Available)
	      && FD_ISSET (channel, &non_keyboard_wait_mask))
	    {
	      int nread;

	      /* If waiting for this channel, arrange to return as
		 soon as no more input to be processed.  No more
		 waiting.  */
	      if (wait_channel == channel)
		{
		  wait_channel = -1;
		  time_limit = -1;
		  got_some_input = 1;
		}
	      proc = chan_process[channel];
	      if (NILP (proc))
		continue;

	      /* Read data from the process, starting with our
		 buffered-ahead character if we have one.  */

	      nread = read_process_output (proc, channel);
	      if (nread > 0)
		{
		  /* Since read_process_output can run a filter,
		     which can call accept-process-output,
		     don't try to read from any other processes
		     before doing the select again.  */
		  FD_ZERO (&Available);

		  if (do_display)
		    redisplay_preserve_echo_area ();
		}
#ifdef EWOULDBLOCK
	      else if (nread == -1 && errno == EWOULDBLOCK)
		;
#else
#ifdef O_NONBLOCK
	      else if (nread == -1 && errno == EAGAIN)
		;
#else
#ifdef O_NDELAY
	      else if (nread == -1 && errno == EAGAIN)
		;
	      /* Note that we cannot distinguish between no input
		 available now and a closed pipe.
		 With luck, a closed pipe will be accompanied by
		 subprocess termination and SIGCHLD.  */
	      else if (nread == 0 && !NETCONN_P (proc))
		;
#endif				/* O_NDELAY */
#endif				/* O_NONBLOCK */
#endif				/* EWOULDBLOCK */
#ifdef HAVE_PTYS
	      /* On some OSs with ptys, when the process on one end of
		 a pty exits, the other end gets an error reading with
		 errno = EIO instead of getting an EOF (0 bytes read).
		 Therefore, if we get an error reading and errno =
		 EIO, just continue, because the child process has
		 exited and should clean itself up soon (e.g. when we
		 get a SIGCHLD). */
	      else if (nread == -1 && errno == EIO)
		;
#endif				/* HAVE_PTYS */
	      /* If we can detect process termination, don't consider the process
		 gone just because its pipe is closed.  */
#ifdef SIGCHLD
	      else if (nread == 0 && !NETCONN_P (proc))
		;
#endif
	      else
		{
		  /* Preserve status of processes already terminated.  */
		  XSETINT (XPROCESS (proc)->tick, ++process_tick);
		  deactivate_process (proc);
		  if (!NILP (XPROCESS (proc)->raw_status_low))
		    update_status (XPROCESS (proc));
		  if (EQ (XPROCESS (proc)->status, Qrun))
		    XPROCESS (proc)->status
		      = Fcons (Qexit, Fcons (make_number (256), Qnil));
		}
	    }
	}			/* end for each file descriptor */
    }				/* end while exit conditions not met */

  waiting_for_user_input_p = 0;

  /* If calling from keyboard input, do not quit
     since we want to return C-g as an input character.
     Otherwise, do pending quit if requested.  */
  if (XINT (read_kbd) >= 0)
    {
      /* Prevent input_pending from remaining set if we quit.  */
      clear_input_pending ();
      QUIT;
    }

  return got_some_input;
}

/* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS.  */

static Lisp_Object
read_process_output_call (fun_and_args)
     Lisp_Object fun_and_args;
{
  return apply1 (XCONS (fun_and_args)->car, XCONS (fun_and_args)->cdr);
}

static Lisp_Object
read_process_output_error_handler (error)
     Lisp_Object error;
{
  cmd_error_internal (error, "error in process filter: ");
  Vinhibit_quit = Qt;
  update_echo_area ();
  Fsleep_for (make_number (2), Qnil);
}

/* Read pending output from the process channel,
   starting with our buffered-ahead character if we have one.
   Yield number of characters read.

   This function reads at most 1024 characters.
   If you want to read all available subprocess output,
   you must call it repeatedly until it returns zero.  */

read_process_output (proc, channel)
     Lisp_Object proc;
     register int channel;
{
  register int nchars;
#ifdef VMS
  char *chars;
#else
  char chars[1024];
#endif
  register Lisp_Object outstream;
  register struct buffer *old = current_buffer;
  register struct Lisp_Process *p = XPROCESS (proc);
  register int opoint;

#ifdef VMS
  VMS_PROC_STUFF *vs, *get_vms_process_pointer();

  vs = get_vms_process_pointer (p->pid);
  if (vs)
    {
      if (!vs->iosb[0])
	return(0);		/* Really weird if it does this */
      if (!(vs->iosb[0] & 1))
	return -1;		/* I/O error */
    }
  else
    error ("Could not get VMS process pointer");
  chars = vs->inputBuffer;
  nchars = clean_vms_buffer (chars, vs->iosb[1]);
  if (nchars <= 0)
    {
      start_vms_process_read (vs); /* Crank up the next read on the process */
      return 1;			/* Nothing worth printing, say we got 1 */
    }
#else /* not VMS */

  if (proc_buffered_char[channel] < 0)
#ifdef WINDOWSNT
    nchars = read_child_output (channel, chars, sizeof (chars));
#else
    nchars = read (channel, chars, sizeof chars);
#endif
  else
    {
      chars[0] = proc_buffered_char[channel];
      proc_buffered_char[channel] = -1;
#ifdef WINDOWSNT
      nchars = read_child_output (channel, chars + 1, sizeof (chars) - 1);
#else
      nchars = read (channel, chars + 1, sizeof chars - 1);
#endif
      if (nchars < 0)
	nchars = 1;
      else
	nchars = nchars + 1;
    }
#endif /* not VMS */

  if (nchars <= 0) return nchars;

  outstream = p->filter;
  if (!NILP (outstream))
    {
      /* We inhibit quit here instead of just catching it so that 
	 hitting ^G when a filter happens to be running won't screw
	 it up.  */
      int count = specpdl_ptr - specpdl;
      Lisp_Object odeactivate;
      Lisp_Object obuffer, okeymap;

      /* No need to gcpro these, because all we do with them later
	 is test them for EQness, and none of them should be a string.  */
      odeactivate = Vdeactivate_mark;
      XSETBUFFER (obuffer, current_buffer);
      okeymap = current_buffer->keymap;

      specbind (Qinhibit_quit, Qt);
      specbind (Qlast_nonmenu_event, Qt);

      running_asynch_code = 1;
      internal_condition_case_1 (read_process_output_call,
				 Fcons (outstream,
					Fcons (proc,
					       Fcons (make_string (chars,
								   nchars),
						      Qnil))),
				 !NILP (Vdebug_on_error) ? Qnil : Qerror,
				 read_process_output_error_handler);
      running_asynch_code = 0;
      restore_match_data ();

      /* Handling the process output should not deactivate the mark.  */
      Vdeactivate_mark = odeactivate;

#if 0 /* Call record_asynch_buffer_change unconditionally,
	 because we might have changed minor modes or other things
	 that affect key bindings.  */
      if (! EQ (Fcurrent_buffer (), obuffer)
	  || ! EQ (current_buffer->keymap, okeymap))
#endif
	/* But do it only if the caller is actually going to read events.
	   Otherwise there's no need to make him wake up, and it could
	   cause trouble (for example it would make Fsit_for return).  */
	if (waiting_for_user_input_p == -1)
	  record_asynch_buffer_change ();

#ifdef VMS
      start_vms_process_read (vs);
#endif
      unbind_to (count, Qnil);
      return nchars;
    }

  /* If no filter, write into buffer if it isn't dead.  */
  if (!NILP (p->buffer) && !NILP (XBUFFER (p->buffer)->name))
    {
      Lisp_Object old_read_only;
      Lisp_Object old_begv, old_zv;
      Lisp_Object odeactivate;

      odeactivate = Vdeactivate_mark;

      Fset_buffer (p->buffer);
      opoint = point;
      old_read_only = current_buffer->read_only;
      XSETFASTINT (old_begv, BEGV);
      XSETFASTINT (old_zv, ZV);

      current_buffer->read_only = Qnil;

      /* Insert new output into buffer
	 at the current end-of-output marker,
	 thus preserving logical ordering of input and output.  */
      if (XMARKER (p->mark)->buffer)
	SET_PT (clip_to_bounds (BEGV, marker_position (p->mark), ZV));
      else
	SET_PT (ZV);

      /* If the output marker is outside of the visible region, save
	 the restriction and widen.  */
      if (! (BEGV <= point && point <= ZV))
	Fwiden ();

      /* Make sure opoint floats ahead of any new text, just as point
	 would.  */
      if (point <= opoint)
	opoint += nchars;

      /* Insert after old_begv, but before old_zv.  */
      if (point < XFASTINT (old_begv))
	XSETFASTINT (old_begv, XFASTINT (old_begv) + nchars);
      if (point <= XFASTINT (old_zv))
	XSETFASTINT (old_zv, XFASTINT (old_zv) + nchars);

      /* Insert before markers in case we are inserting where
	 the buffer's mark is, and the user's next command is Meta-y.  */
      insert_before_markers (chars, nchars);
      Fset_marker (p->mark, make_number (point), p->buffer);

      update_mode_lines++;

      /* If the restriction isn't what it should be, set it.  */
      if (XFASTINT (old_begv) != BEGV || XFASTINT (old_zv) != ZV)
	Fnarrow_to_region (old_begv, old_zv);

      /* Handling the process output should not deactivate the mark.  */
      Vdeactivate_mark = odeactivate;

      current_buffer->read_only = old_read_only;
      SET_PT (opoint);
      set_buffer_internal (old);
    }
#ifdef VMS
  start_vms_process_read (vs);
#endif
  return nchars;
}

DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p, Swaiting_for_user_input_p,
       0, 0, 0,
  "Returns non-nil if emacs is waiting for input from the user.\n\
This is intended for use by asynchronous process output filters and sentinels.")
       ()
{
  return (waiting_for_user_input_p ? Qt : Qnil);
}

/* Sending data to subprocess */

jmp_buf send_process_frame;

SIGTYPE
send_process_trap ()
{
#ifdef BSD4_1
  sigrelse (SIGPIPE);
  sigrelse (SIGALRM);
#endif /* BSD4_1 */
  longjmp (send_process_frame, 1);
}

/* Send some data to process PROC.
   BUF is the beginning of the data; LEN is the number of characters.
   OBJECT is the Lisp object that the data comes from.  */

send_process (proc, buf, len, object)
     volatile Lisp_Object proc;
     char *buf;
     int len;
     Lisp_Object object;
{
  /* Use volatile to protect variables from being clobbered by longjmp.  */
  int rv;
  volatile unsigned char *procname = XSTRING (XPROCESS (proc)->name)->data;

#ifdef VMS
  struct Lisp_Process *p = XPROCESS (proc);
  VMS_PROC_STUFF *vs, *get_vms_process_pointer();
#endif /* VMS */

  if (! NILP (XPROCESS (proc)->raw_status_low))
    update_status (XPROCESS (proc));
  if (! EQ (XPROCESS (proc)->status, Qrun))
    error ("Process %s not running", procname);

#ifdef VMS
  vs = get_vms_process_pointer (p->pid);
  if (vs == 0)
    error ("Could not find this process: %x", p->pid);
  else if (write_to_vms_process (vs, buf, len))
    ;
#else

  if (pty_max_bytes == 0)
    {
#if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON)
      pty_max_bytes = fpathconf (XFASTINT (XPROCESS (proc)->outfd),
				 _PC_MAX_CANON);
      if (pty_max_bytes < 0)
	pty_max_bytes = 250;
#else
      pty_max_bytes = 250;
#endif
      /* Deduct one, to leave space for the eof.  */
      pty_max_bytes--;
    }

  if (!setjmp (send_process_frame))
    while (len > 0)
      {
	int this = len;
	SIGTYPE (*old_sigpipe)();
	int flush_pty = 0;

	/* Decide how much data we can send in one batch.
	   Long lines need to be split into multiple batches.  */
	if (!NILP (XPROCESS (proc)->pty_flag))
	  {
	    /* Starting this at zero is always correct when not the first iteration
	       because the previous iteration ended by sending C-d.
	       It may not be correct for the first iteration
	       if a partial line was sent in a separate send_process call.
	       If that proves worth handling, we need to save linepos
	       in the process object.  */
	    int linepos = 0;
	    char *ptr = buf;
	    char *end = buf + len;

	    /* Scan through this text for a line that is too long.  */
	    while (ptr != end && linepos < pty_max_bytes)
	      {
		if (*ptr == '\n')
		  linepos = 0;
		else
		  linepos++;
		ptr++;
	      }
	    /* If we found one, break the line there
	       and put in a C-d to force the buffer through.  */
	    this = ptr - buf;
	  }

	/* Send this batch, using one or more write calls.  */
	while (this > 0)
	  {
	    old_sigpipe = (SIGTYPE (*) ()) signal (SIGPIPE, send_process_trap);
	    rv = write (XINT (XPROCESS (proc)->outfd), buf, this);
	    signal (SIGPIPE, old_sigpipe);

	    if (rv < 0)
	      {
		if (0
#ifdef EWOULDBLOCK
		    || errno == EWOULDBLOCK
#endif
#ifdef EAGAIN
		    || errno == EAGAIN
#endif
		    )
		  /* Buffer is full.  Wait, accepting input; 
		     that may allow the program
		     to finish doing output and read more.  */
		  {
		    Lisp_Object zero;
		    int offset;

		    /* Running filters might relocate buffers or strings.
		       Arrange to relocate BUF.  */
		    if (BUFFERP (object))
		      offset = BUF_PTR_CHAR_POS (XBUFFER (object),
						 (unsigned char *) buf);
		    else if (STRINGP (object))
		      offset = buf - (char *) XSTRING (object)->data;

		    XSETFASTINT (zero, 0);
		    wait_reading_process_input (1, 0, zero, 0);

		    if (BUFFERP (object))
		      buf = (char *) BUF_CHAR_ADDRESS (XBUFFER (object), offset);
		    else if (STRINGP (object))
		      buf = offset + (char *) XSTRING (object)->data;

		    rv = 0;
		  }
		else
		  /* This is a real error.  */
		  report_file_error ("writing to process", Fcons (proc, Qnil));
	      }
	    buf += rv;
	    len -= rv;
	    this -= rv;
	  }

	/* If we sent just part of the string, put in an EOF
	   to force it through, before we send the rest.  */
	if (len > 0)
	  Fprocess_send_eof (proc);
      }
#endif
  else
    {
      XPROCESS (proc)->raw_status_low = Qnil;
      XPROCESS (proc)->raw_status_high = Qnil;
      XPROCESS (proc)->status = Fcons (Qexit, Fcons (make_number (256), Qnil));
      XSETINT (XPROCESS (proc)->tick, ++process_tick);
      deactivate_process (proc);
#ifdef VMS
      error ("Error writing to process %s; closed it", procname);
#else
      error ("SIGPIPE raised on process %s; closed it", procname);
#endif
    }
}

DEFUN ("process-send-region", Fprocess_send_region, Sprocess_send_region,
  3, 3, 0,
  "Send current contents of region as input to PROCESS.\n\
PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
nil, indicating the current buffer's process.\n\
Called from program, takes three arguments, PROCESS, START and END.\n\
If the region is more than 500 characters long,\n\
it is sent in several bunches.  This may happen even for shorter regions.\n\
Output from processes can arrive in between bunches.")
  (process, start, end)
     Lisp_Object process, start, end;
{
  Lisp_Object proc;
  int start1;

  proc = get_process (process);
  validate_region (&start, &end);

  if (XINT (start) < GPT && XINT (end) > GPT)
    move_gap (start);

  start1 = XINT (start);
  send_process (proc, &FETCH_CHAR (start1), XINT (end) - XINT (start),
		Fcurrent_buffer ());

  return Qnil;
}

DEFUN ("process-send-string", Fprocess_send_string, Sprocess_send_string,
  2, 2, 0,
  "Send PROCESS the contents of STRING as input.\n\
PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
nil, indicating the current buffer's process.\n\
If STRING is more than 500 characters long,\n\
it is sent in several bunches.  This may happen even for shorter strings.\n\
Output from processes can arrive in between bunches.")
  (process, string)
     Lisp_Object process, string;
{
  Lisp_Object proc;
  CHECK_STRING (string, 1);
  proc = get_process (process);
  send_process (proc, XSTRING (string)->data, XSTRING (string)->size, string);
  return Qnil;
}

/* send a signal number SIGNO to PROCESS.
   CURRENT_GROUP means send to the process group that currently owns
   the terminal being used to communicate with PROCESS.
   This is used for various commands in shell mode.
   If NOMSG is zero, insert signal-announcements into process's buffers
   right away.

   If we can, we try to signal PROCESS by sending control characters
   down the pty.  This allows us to signal inferiors who have changed
   their uid, for which killpg would return an EPERM error.  */

static void
process_send_signal (process, signo, current_group, nomsg)
     Lisp_Object process;
     int signo;
     Lisp_Object current_group;
     int nomsg;
{
  Lisp_Object proc;
  register struct Lisp_Process *p;
  int gid;
  int no_pgrp = 0;

  proc = get_process (process);
  p = XPROCESS (proc);

  if (!EQ (p->childp, Qt))
    error ("Process %s is not a subprocess",
	   XSTRING (p->name)->data);
  if (XINT (p->infd) < 0)
    error ("Process %s is not active",
	   XSTRING (p->name)->data);

  if (NILP (p->pty_flag))
    current_group = Qnil;

  /* If we are using pgrps, get a pgrp number and make it negative.  */
  if (!NILP (current_group))
    {
#ifdef SIGNALS_VIA_CHARACTERS
      /* If possible, send signals to the entire pgrp
	 by sending an input character to it.  */

      /* TERMIOS is the latest and bestest, and seems most likely to
         work.  If the system has it, use it.  */
#ifdef HAVE_TERMIOS
      struct termios t;

      switch (signo)
	{
	case SIGINT:
	  tcgetattr (XINT (p->infd), &t);
	  send_process (proc, &t.c_cc[VINTR], 1, Qnil);
	  return;

	case SIGQUIT:
	  tcgetattr (XINT (p->infd), &t);
  	  send_process (proc, &t.c_cc[VQUIT], 1, Qnil);
  	  return;

  	case SIGTSTP:
	  tcgetattr (XINT (p->infd), &t);
#if defined (VSWTCH) && !defined (PREFER_VSUSP)
  	  send_process (proc, &t.c_cc[VSWTCH], 1, Qnil);
#else
	  send_process (proc, &t.c_cc[VSUSP], 1, Qnil);
#endif
  	  return;
	}

#else /* ! HAVE_TERMIOS */

      /* On Berkeley descendants, the following IOCTL's retrieve the
	 current control characters.  */
#if defined (TIOCGLTC) && defined (TIOCGETC)

      struct tchars c;
      struct ltchars lc;

      switch (signo)
	{
	case SIGINT:
	  ioctl (XINT (p->infd), TIOCGETC, &c);
	  send_process (proc, &c.t_intrc, 1, Qnil);
	  return;
	case SIGQUIT:
	  ioctl (XINT (p->infd), TIOCGETC, &c);
	  send_process (proc, &c.t_quitc, 1, Qnil);
	  return;
#ifdef SIGTSTP
	case SIGTSTP:
	  ioctl (XINT (p->infd), TIOCGLTC, &lc);
	  send_process (proc, &lc.t_suspc, 1, Qnil);
	  return;
#endif /* ! defined (SIGTSTP) */
	}

#else /* ! defined (TIOCGLTC) && defined (TIOCGETC) */

      /* On SYSV descendants, the TCGETA ioctl retrieves the current control
	 characters.  */
#ifdef TCGETA
      struct termio t;
      switch (signo)
	{
	case SIGINT:
	  ioctl (XINT (p->infd), TCGETA, &t);
	  send_process (proc, &t.c_cc[VINTR], 1, Qnil);
	  return;
	case SIGQUIT:
	  ioctl (XINT (p->infd), TCGETA, &t);
	  send_process (proc, &t.c_cc[VQUIT], 1, Qnil);
	  return;
#ifdef SIGTSTP
	case SIGTSTP:
	  ioctl (XINT (p->infd), TCGETA, &t);
	  send_process (proc, &t.c_cc[VSWTCH], 1, Qnil);
	  return;
#endif /* ! defined (SIGTSTP) */
	}
#else /* ! defined (TCGETA) */
      Your configuration files are messed up.
      /* If your system configuration files define SIGNALS_VIA_CHARACTERS,
	 you'd better be using one of the alternatives above!  */
#endif /* ! defined (TCGETA) */
#endif /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
#endif /* ! defined HAVE_TERMIOS */
#endif /* ! defined (SIGNALS_VIA_CHARACTERS) */

#ifdef TIOCGPGRP 
      /* Get the pgrp using the tty itself, if we have that.
	 Otherwise, use the pty to get the pgrp.
	 On pfa systems, saka@pfu.fujitsu.co.JP writes:
	 "TIOCGPGRP symbol defined in sys/ioctl.h at E50.
	 But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
	 His patch indicates that if TIOCGPGRP returns an error, then
	 we should just assume that p->pid is also the process group id.  */
      {
	int err;

	if (!NILP (p->subtty))
	  err = ioctl (XFASTINT (p->subtty), TIOCGPGRP, &gid);
	else
	  err = ioctl (XINT (p->infd), TIOCGPGRP, &gid);

#ifdef pfa
	if (err == -1)
	  gid = - XFASTINT (p->pid);
#endif /* ! defined (pfa) */
      }
      if (gid == -1)
	no_pgrp = 1;
      else
	gid = - gid;
#else  /* ! defined (TIOCGPGRP ) */
      /* Can't select pgrps on this system, so we know that
	 the child itself heads the pgrp.  */
      gid = - XFASTINT (p->pid);
#endif /* ! defined (TIOCGPGRP ) */
    }
  else
    gid = - XFASTINT (p->pid);

  switch (signo)
    {
#ifdef SIGCONT
    case SIGCONT:
      p->raw_status_low = Qnil;
      p->raw_status_high = Qnil;
      p->status = Qrun;
      XSETINT (p->tick, ++process_tick);
      if (!nomsg)
	status_notify ();
      break;
#endif /* ! defined (SIGCONT) */
    case SIGINT:
#ifdef VMS
      send_process (proc, "\003", 1, Qnil);	/* ^C */
      goto whoosh;
#endif
    case SIGQUIT:
#ifdef VMS
      send_process (proc, "\031", 1, Qnil);	/* ^Y */
      goto whoosh;
#endif
    case SIGKILL:
#ifdef VMS
      sys$forcex (&(XFASTINT (p->pid)), 0, 1);
      whoosh:
#endif
      flush_pending_output (XINT (p->infd));
      break;
    }

  /* If we don't have process groups, send the signal to the immediate
     subprocess.  That isn't really right, but it's better than any
     obvious alternative.  */
  if (no_pgrp)
    {
      kill (XFASTINT (p->pid), signo);
      return;
    }

  /* gid may be a pid, or minus a pgrp's number */
#ifdef TIOCSIGSEND
  if (!NILP (current_group))
    ioctl (XINT (p->infd), TIOCSIGSEND, signo);
  else
    {
      gid = - XFASTINT (p->pid);
      kill (gid, signo);
    }
#else /* ! defined (TIOCSIGSEND) */
  EMACS_KILLPG (-gid, signo);
#endif /* ! defined (TIOCSIGSEND) */
}

DEFUN ("interrupt-process", Finterrupt_process, Sinterrupt_process, 0, 2, 0,
  "Interrupt process PROCESS.  May be process or name of one.\n\
PROCESS may be a process, a buffer, or the name of a process or buffer.\n\
nil or no arg means current buffer's process.\n\
Second arg CURRENT-GROUP non-nil means send signal to\n\
the current process-group of the process's controlling terminal\n\
rather than to the process's own process group.\n\
If the process is a shell, this means interrupt current subjob\n\
rather than the shell.")
  (process, current_group)
     Lisp_Object process, current_group;
{
  process_send_signal (process, SIGINT, current_group, 0);
  return process;
}

DEFUN ("kill-process", Fkill_process, Skill_process, 0, 2, 0,
  "Kill process PROCESS.  May be process or name of one.\n\
See function `interrupt-process' for more details on usage.")
  (process, current_group)
     Lisp_Object process, current_group;
{
  process_send_signal (process, SIGKILL, current_group, 0);
  return process;
}

DEFUN ("quit-process", Fquit_process, Squit_process, 0, 2, 0,
  "Send QUIT signal to process PROCESS.  May be process or name of one.\n\
See function `interrupt-process' for more details on usage.")
  (process, current_group)
     Lisp_Object process, current_group;
{
  process_send_signal (process, SIGQUIT, current_group, 0);
  return process;
}

DEFUN ("stop-process", Fstop_process, Sstop_process, 0, 2, 0,
  "Stop process PROCESS.  May be process or name of one.\n\
See function `interrupt-process' for more details on usage.")
  (process, current_group)
     Lisp_Object process, current_group;
{
#ifndef SIGTSTP
  error ("no SIGTSTP support");
#else
  process_send_signal (process, SIGTSTP, current_group, 0);
#endif
  return process;
}

DEFUN ("continue-process", Fcontinue_process, Scontinue_process, 0, 2, 0,
  "Continue process PROCESS.  May be process or name of one.\n\
See function `interrupt-process' for more details on usage.")
  (process, current_group)
     Lisp_Object process, current_group;
{
#ifdef SIGCONT
    process_send_signal (process, SIGCONT, current_group, 0);
#else
    error ("no SIGCONT support");
#endif
  return process;
}

DEFUN ("signal-process", Fsignal_process, Ssignal_process,
  2, 2, "nProcess number: \nnSignal code: ",
  "Send the process with process id PID the signal with code SIGCODE.\n\
PID must be an integer.  The process need not be a child of this Emacs.\n\
SIGCODE may be an integer, or a symbol whose name is a signal name.")
  (pid, sigcode)
     Lisp_Object pid, sigcode;
{
  CHECK_NUMBER (pid, 0);

#define handle_signal(NAME, VALUE)		\
  else if (!strcmp (name, NAME))		\
    XSETINT (sigcode, VALUE)

  if (INTEGERP (sigcode))
    ;
  else
    {
      unsigned char *name;

      CHECK_SYMBOL (sigcode, 1);
      name = XSYMBOL (sigcode)->name->data;

      if (0)
	;
#ifdef SIGHUP
      handle_signal ("SIGHUP", SIGHUP);
#endif
#ifdef SIGINT
      handle_signal ("SIGINT", SIGINT);
#endif
#ifdef SIGQUIT
      handle_signal ("SIGQUIT", SIGQUIT);
#endif
#ifdef SIGILL
      handle_signal ("SIGILL", SIGILL);
#endif
#ifdef SIGABRT
      handle_signal ("SIGABRT", SIGABRT);
#endif
#ifdef SIGEMT
      handle_signal ("SIGEMT", SIGEMT);
#endif
#ifdef SIGKILL
      handle_signal ("SIGKILL", SIGKILL);
#endif
#ifdef SIGFPE
      handle_signal ("SIGFPE", SIGFPE);
#endif
#ifdef SIGBUS
      handle_signal ("SIGBUS", SIGBUS);
#endif
#ifdef SIGSEGV
      handle_signal ("SIGSEGV", SIGSEGV);
#endif
#ifdef SIGSYS
      handle_signal ("SIGSYS", SIGSYS);
#endif
#ifdef SIGPIPE
      handle_signal ("SIGPIPE", SIGPIPE);
#endif
#ifdef SIGALRM
      handle_signal ("SIGALRM", SIGALRM);
#endif
#ifdef SIGTERM
      handle_signal ("SIGTERM", SIGTERM);
#endif
#ifdef SIGURG
      handle_signal ("SIGURG", SIGURG);
#endif
#ifdef SIGSTOP
      handle_signal ("SIGSTOP", SIGSTOP);
#endif
#ifdef SIGTSTP
      handle_signal ("SIGTSTP", SIGTSTP);
#endif
#ifdef SIGCONT
      handle_signal ("SIGCONT", SIGCONT);
#endif
#ifdef SIGCHLD
      handle_signal ("SIGCHLD", SIGCHLD);
#endif
#ifdef SIGTTIN
      handle_signal ("SIGTTIN", SIGTTIN);
#endif
#ifdef SIGTTOU
      handle_signal ("SIGTTOU", SIGTTOU);
#endif
#ifdef SIGIO
      handle_signal ("SIGIO", SIGIO);
#endif
#ifdef SIGXCPU
      handle_signal ("SIGXCPU", SIGXCPU);
#endif
#ifdef SIGXFSZ
      handle_signal ("SIGXFSZ", SIGXFSZ);
#endif
#ifdef SIGVTALRM
      handle_signal ("SIGVTALRM", SIGVTALRM);
#endif
#ifdef SIGPROF
      handle_signal ("SIGPROF", SIGPROF);
#endif
#ifdef SIGWINCH
      handle_signal ("SIGWINCH", SIGWINCH);
#endif
#ifdef SIGINFO
      handle_signal ("SIGINFO", SIGINFO);
#endif
#ifdef SIGUSR1
      handle_signal ("SIGUSR1", SIGUSR1);
#endif
#ifdef SIGUSR2
      handle_signal ("SIGUSR2", SIGUSR2);
#endif
      else
	error ("Undefined signal name %s", name);
    }

#undef handle_signal

#ifdef WINDOWSNT
  /* Only works for kill-type signals */
  return make_number (win32_kill_process (XINT (pid), XINT (sigcode)));
#else
  return make_number (kill (XINT (pid), XINT (sigcode)));
#endif
}

DEFUN ("process-send-eof", Fprocess_send_eof, Sprocess_send_eof, 0, 1, 0,
  "Make PROCESS see end-of-file in its input.\n\
Eof comes after any text already sent to it.\n\
PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
nil, indicating the current buffer's process.\n\
If PROCESS is a network connection, or is a process communicating\n\
through a pipe (as opposed to a pty), then you cannot send any more\n\
text to PROCESS after you call this function.")
  (process)
     Lisp_Object process;
{
  Lisp_Object proc;

  proc = get_process (process);

  /* Make sure the process is really alive.  */
  if (! NILP (XPROCESS (proc)->raw_status_low))
    update_status (XPROCESS (proc));
  if (! EQ (XPROCESS (proc)->status, Qrun))
    error ("Process %s not running", XSTRING (XPROCESS (proc)->name)->data);

#ifdef VMS
  send_process (proc, "\032", 1, Qnil); 	/* ^z */
#else
  if (!NILP (XPROCESS (proc)->pty_flag))
    send_process (proc, "\004", 1, Qnil);
  else
    {
      close (XINT (XPROCESS (proc)->outfd));
      XSETINT (XPROCESS (proc)->outfd, open (NULL_DEVICE, O_WRONLY));
    }
#endif /* VMS */
  return process;
}

/* Kill all processes associated with `buffer'.
 If `buffer' is nil, kill all processes  */

kill_buffer_processes (buffer)
     Lisp_Object buffer;
{
  Lisp_Object tail, proc;

  for (tail = Vprocess_alist; GC_CONSP (tail); tail = XCONS (tail)->cdr)
    {
      proc = XCONS (XCONS (tail)->car)->cdr;
      if (GC_PROCESSP (proc)
	  && (NILP (buffer) || EQ (XPROCESS (proc)->buffer, buffer)))
	{
	  if (NETCONN_P (proc))
	    Fdelete_process (proc);
	  else if (XINT (XPROCESS (proc)->infd) >= 0)
	    process_send_signal (proc, SIGHUP, Qnil, 1);
	}
    }
}

/* On receipt of a signal that a child status has changed,
 loop asking about children with changed statuses until
 the system says there are no more.
   All we do is change the status;
 we do not run sentinels or print notifications.
 That is saved for the next time keyboard input is done,
 in order to avoid timing errors.  */

/** WARNING: this can be called during garbage collection.
 Therefore, it must not be fooled by the presence of mark bits in
 Lisp objects.  */

/** USG WARNING:  Although it is not obvious from the documentation
 in signal(2), on a USG system the SIGCLD handler MUST NOT call
 signal() before executing at least one wait(), otherwise the handler
 will be called again, resulting in an infinite loop.  The relevant
 portion of the documentation reads "SIGCLD signals will be queued
 and the signal-catching function will be continually reentered until
 the queue is empty".  Invoking signal() causes the kernel to reexamine
 the SIGCLD queue.   Fred Fish, UniSoft Systems Inc. */

SIGTYPE
sigchld_handler (signo)
     int signo;
{
  int old_errno = errno;
  Lisp_Object proc;
  register struct Lisp_Process *p;
  extern EMACS_TIME *input_available_clear_time;

#ifdef BSD4_1
  extern int sigheld;
  sigheld |= sigbit (SIGCHLD);
#endif

  while (1)
    {
      register int pid;
      WAITTYPE w;
      Lisp_Object tail;

#ifdef WNOHANG
#ifndef WUNTRACED
#define WUNTRACED 0
#endif /* no WUNTRACED */
      /* Keep trying to get a status until we get a definitive result.  */
      do 
	{
	  errno = 0;
	  pid = wait3 (&w, WNOHANG | WUNTRACED, 0);
	}
      while (pid <= 0 && errno == EINTR);

      if (pid <= 0)
	{
	  /* A real failure.  We have done all our job, so return.  */

	  /* USG systems forget handlers when they are used;
	     must reestablish each time */
#ifdef USG
	  signal (signo, sigchld_handler);   /* WARNING - must come after wait3() */
#endif
#ifdef  BSD4_1
	  sigheld &= ~sigbit (SIGCHLD);
	  sigrelse (SIGCHLD);
#endif
	  errno = old_errno;
	  return;
	}
#else
      pid = wait (&w);
#endif /* no WNOHANG */

      /* Find the process that signaled us, and record its status.  */

      p = 0;
      for (tail = Vprocess_alist; XSYMBOL (tail) != XSYMBOL (Qnil); tail = XCONS (tail)->cdr)
	{
	  proc = XCONS (XCONS (tail)->car)->cdr;
	  p = XPROCESS (proc);
	  if (EQ (p->childp, Qt) && XFASTINT (p->pid) == pid)
	    break;
	  p = 0;
	}

      /* Look for an asynchronous process whose pid hasn't been filled
	 in yet.  */
      if (p == 0)
	for (tail = Vprocess_alist; XSYMBOL (tail) != XSYMBOL (Qnil); tail = XCONS (tail)->cdr)
	  {
	    proc = XCONS (XCONS (tail)->car)->cdr;
	    p = XPROCESS (proc);
	    if (INTEGERP (p->pid) && XINT (p->pid) == -1)
	      break;
	    p = 0;
	  }
      
      /* Change the status of the process that was found.  */
      if (p != 0)
	{
	  union { int i; WAITTYPE wt; } u;
	  int clear_desc_flag = 0;
	  
	  XSETINT (p->tick, ++process_tick);
	  u.wt = w;
	  XSETINT (p->raw_status_low, u.i & 0xffff);
	  XSETINT (p->raw_status_high, u.i >> 16);
	  
	  /* If process has terminated, stop waiting for its output.  */
	  if ((WIFSIGNALED (w) || WIFEXITED (w))
	      && XINT (p->infd) >= 0)
	    clear_desc_flag = 1;

	  /* We use clear_desc_flag to avoid a compiler bug in Microsoft C.  */
	  if (clear_desc_flag)
	    {
	      FD_CLR (XINT (p->infd), &input_wait_mask);
	      FD_CLR (XINT (p->infd), &non_keyboard_wait_mask);
	    }

	  /* Tell wait_reading_process_input that it needs to wake up and
	     look around.  */
	  if (input_available_clear_time)
	    EMACS_SET_SECS_USECS (*input_available_clear_time, 0, 0);
	}

	/* There was no asynchronous process found for that id.  Check
	   if we have a synchronous process.  */
      else
	{
	  synch_process_alive = 0;

	  /* Report the status of the synchronous process.  */
	  if (WIFEXITED (w))
	    synch_process_retcode = WRETCODE (w);
	  else if (WIFSIGNALED (w))
	    {
	      int code = WTERMSIG (w);
	      char *signame = 0;

	      if (code < NSIG)
		{
#ifndef VMS
		  /* Suppress warning if the table has const char *.  */
		  signame = (char *) sys_siglist[code];
#else
		  signame = sys_errlist[code];
#endif
		}
	      if (signame == 0)
		signame = "unknown";

	      synch_process_death = signame;
	    }

	  /* Tell wait_reading_process_input that it needs to wake up and
	     look around.  */
	  if (input_available_clear_time)
	    EMACS_SET_SECS_USECS (*input_available_clear_time, 0, 0);
	}

      /* On some systems, we must return right away.
	 If any more processes want to signal us, we will
	 get another signal.
	 Otherwise (on systems that have WNOHANG), loop around
	 to use up all the processes that have something to tell us.  */
#if defined (USG) && ! (defined (HPUX) && defined (WNOHANG)) || defined (WINDOWSNT)
#ifdef USG
      signal (signo, sigchld_handler);
#endif
      errno = old_errno;
      return;
#endif /* USG, but not HPUX with WNOHANG */
    }
}


static Lisp_Object
exec_sentinel_unwind (data)
     Lisp_Object data;
{
  XPROCESS (XCONS (data)->car)->sentinel = XCONS (data)->cdr;
  return Qnil;
}

static Lisp_Object
exec_sentinel_error_handler (error)
     Lisp_Object error;
{
  cmd_error_internal (error, "error in process sentinel: ");
  Vinhibit_quit = Qt;
  update_echo_area ();
  Fsleep_for (make_number (2), Qnil);
}

static void
exec_sentinel (proc, reason)
     Lisp_Object proc, reason;
{
  Lisp_Object sentinel, obuffer, odeactivate, okeymap;
  register struct Lisp_Process *p = XPROCESS (proc);
  int count = specpdl_ptr - specpdl;

  /* No need to gcpro these, because all we do with them later
     is test them for EQness, and none of them should be a string.  */
  odeactivate = Vdeactivate_mark;
  XSETBUFFER (obuffer, current_buffer);
  okeymap = current_buffer->keymap;

  sentinel = p->sentinel;
  if (NILP (sentinel))
    return;

  /* Zilch the sentinel while it's running, to avoid recursive invocations;
     assure that it gets restored no matter how the sentinel exits.  */
  p->sentinel = Qnil;
  record_unwind_protect (exec_sentinel_unwind, Fcons (proc, sentinel));
  /* Inhibit quit so that random quits don't screw up a running filter.  */
  specbind (Qinhibit_quit, Qt);
  specbind (Qlast_nonmenu_event, Qt);

  running_asynch_code = 1;
  internal_condition_case_1 (read_process_output_call,
			     Fcons (sentinel,
				    Fcons (proc, Fcons (reason, Qnil))),
			     !NILP (Vdebug_on_error) ? Qnil : Qerror,
			     exec_sentinel_error_handler);
  running_asynch_code = 0;
  restore_match_data ();

  Vdeactivate_mark = odeactivate;
#if 0
  if (! EQ (Fcurrent_buffer (), obuffer)
      || ! EQ (current_buffer->keymap, okeymap))
#endif
    /* But do it only if the caller is actually going to read events.
       Otherwise there's no need to make him wake up, and it could
       cause trouble (for example it would make Fsit_for return).  */
    if (waiting_for_user_input_p == -1)
      record_asynch_buffer_change ();

  unbind_to (count, Qnil);
}

/* Report all recent events of a change in process status
   (either run the sentinel or output a message).
   This is done while Emacs is waiting for keyboard input.  */

status_notify ()
{
  register Lisp_Object proc, buffer;
  Lisp_Object tail, msg;
  struct gcpro gcpro1, gcpro2;

  tail = Qnil;
  msg = Qnil;
  /* We need to gcpro tail; if read_process_output calls a filter
     which deletes a process and removes the cons to which tail points
     from Vprocess_alist, and then causes a GC, tail is an unprotected
     reference.  */
  GCPRO2 (tail, msg);

  /* Set this now, so that if new processes are created by sentinels
     that we run, we get called again to handle their status changes.  */
  update_tick = process_tick;

  for (tail = Vprocess_alist; !NILP (tail); tail = Fcdr (tail))
    {
      Lisp_Object symbol;
      register struct Lisp_Process *p;

      proc = Fcdr (Fcar (tail));
      p = XPROCESS (proc);

      if (XINT (p->tick) != XINT (p->update_tick))
	{
	  XSETINT (p->update_tick, XINT (p->tick));

	  /* If process is still active, read any output that remains.  */
	  if (XINT (p->infd) >= 0)
	    while (! EQ (p->filter, Qt)
		   && read_process_output (proc, XINT (p->infd)) > 0);

	  buffer = p->buffer;

	  /* Get the text to use for the message.  */
	  if (!NILP (p->raw_status_low))
	    update_status (p);
	  msg = status_message (p->status);

	  /* If process is terminated, deactivate it or delete it.  */
	  symbol = p->status;
	  if (CONSP (p->status))
	    symbol = XCONS (p->status)->car;

	  if (EQ (symbol, Qsignal) || EQ (symbol, Qexit)
	      || EQ (symbol, Qclosed))
	    {
	      if (delete_exited_processes)
		remove_process (proc);
	      else
		deactivate_process (proc);
	    }

	  /* Now output the message suitably.  */
	  if (!NILP (p->sentinel))
	    exec_sentinel (proc, msg);
	  /* Don't bother with a message in the buffer
	     when a process becomes runnable.  */
	  else if (!EQ (symbol, Qrun) && !NILP (buffer))
	    {
	      Lisp_Object ro, tem;
	      struct buffer *old = current_buffer;
	      int opoint;

	      ro = XBUFFER (buffer)->read_only;

	      /* Avoid error if buffer is deleted
		 (probably that's why the process is dead, too) */
	      if (NILP (XBUFFER (buffer)->name))
		continue;
	      Fset_buffer (buffer);
	      opoint = point;
	      /* Insert new output into buffer
		 at the current end-of-output marker,
		 thus preserving logical ordering of input and output.  */
	      if (XMARKER (p->mark)->buffer)
		SET_PT (marker_position (p->mark));
	      else
		SET_PT (ZV);
	      if (point <= opoint)
		opoint += XSTRING (msg)->size + XSTRING (p->name)->size + 10;

	      tem = current_buffer->read_only;
	      current_buffer->read_only = Qnil;
	      insert_string ("\nProcess ");
	      Finsert (1, &p->name);
	      insert_string (" ");
	      Finsert (1, &msg);
	      current_buffer->read_only = tem;
	      Fset_marker (p->mark, make_number (point), p->buffer);

	      SET_PT (opoint);
	      set_buffer_internal (old);
	    }
	}
    } /* end for */

  update_mode_lines++;  /* in case buffers use %s in mode-line-format */
  redisplay_preserve_echo_area ();

  UNGCPRO;
}

/* The first time this is called, assume keyboard input comes from DESC
   instead of from where we used to expect it.
   Subsequent calls mean assume input keyboard can come from DESC
   in addition to other places.  */

static int add_keyboard_wait_descriptor_called_flag;

void
add_keyboard_wait_descriptor (desc)
     int desc;
{
  if (! add_keyboard_wait_descriptor_called_flag)
    FD_CLR (0, &input_wait_mask);
  add_keyboard_wait_descriptor_called_flag = 1;
  FD_SET (desc, &input_wait_mask);
  if (desc > max_keyboard_desc)
    max_keyboard_desc = desc;
}

/* From now on, do not expect DESC to give keyboard input.  */

void
delete_keyboard_wait_descriptor (desc)
     int desc;
{
  int fd;
  int lim = max_keyboard_desc;

  FD_CLR (desc, &input_wait_mask);

  if (desc == max_keyboard_desc)
    for (fd = 0; fd < lim; fd++)
      if (FD_ISSET (fd, &input_wait_mask)
	  && !FD_ISSET (fd, &non_keyboard_wait_mask))
	max_keyboard_desc = fd;
}

/* Return nonzero if *MASK has a bit set
   that corresponds to one of the keyboard input descriptors.  */

int
keyboard_bit_set (mask)
     SELECT_TYPE *mask;
{
  int fd;

  for (fd = 0; fd <= max_keyboard_desc; fd++)
    if (FD_ISSET (fd, mask) && FD_ISSET (fd, &input_wait_mask)
	&& !FD_ISSET (fd, &non_keyboard_wait_mask))
      return 1;

  return 0;
}

init_process ()
{
  register int i;

#ifdef SIGCHLD
#ifndef CANNOT_DUMP
  if (! noninteractive || initialized)
#endif
    signal (SIGCHLD, sigchld_handler);
#endif

  FD_ZERO (&input_wait_mask);
  FD_ZERO (&non_keyboard_wait_mask);
  max_process_desc = 0;

  FD_SET (0, &input_wait_mask);

  Vprocess_alist = Qnil;
  for (i = 0; i < MAXDESC; i++)
    {
      chan_process[i] = Qnil;
      proc_buffered_char[i] = -1;
    }
}

syms_of_process ()
{
#ifdef HAVE_SOCKETS
  stream_process = intern ("stream");
#endif
  Qprocessp = intern ("processp");
  staticpro (&Qprocessp);
  Qrun = intern ("run");
  staticpro (&Qrun);
  Qstop = intern ("stop");
  staticpro (&Qstop);
  Qsignal = intern ("signal");
  staticpro (&Qsignal);

  /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it
     here again.

     Qexit = intern ("exit");
     staticpro (&Qexit); */

  Qopen = intern ("open");
  staticpro (&Qopen);
  Qclosed = intern ("closed");
  staticpro (&Qclosed);

  Qlast_nonmenu_event = intern ("last-nonmenu-event");
  staticpro (&Qlast_nonmenu_event);

  staticpro (&Vprocess_alist);

  DEFVAR_BOOL ("delete-exited-processes", &delete_exited_processes,
    "*Non-nil means delete processes immediately when they exit.\n\
nil means don't delete them until `list-processes' is run.");

  delete_exited_processes = 1;

  DEFVAR_LISP ("process-connection-type", &Vprocess_connection_type,
    "Control type of device used to communicate with subprocesses.\n\
Values are nil to use a pipe, or t or `pty' to use a pty.\n\
The value has no effect if the system has no ptys or if all ptys are busy:\n\
then a pipe is used in any case.\n\
The value takes effect when `start-process' is called.");
  Vprocess_connection_type = Qt;

  defsubr (&Sprocessp);
  defsubr (&Sget_process);
  defsubr (&Sget_buffer_process);
  defsubr (&Sdelete_process);
  defsubr (&Sprocess_status);
  defsubr (&Sprocess_exit_status);
  defsubr (&Sprocess_id);
  defsubr (&Sprocess_name);
  defsubr (&Sprocess_tty_name);
  defsubr (&Sprocess_command);
  defsubr (&Sset_process_buffer);
  defsubr (&Sprocess_buffer);
  defsubr (&Sprocess_mark);
  defsubr (&Sset_process_filter);
  defsubr (&Sprocess_filter);
  defsubr (&Sset_process_sentinel);
  defsubr (&Sset_process_window_size);
  defsubr (&Sprocess_sentinel);
  defsubr (&Sprocess_kill_without_query);
  defsubr (&Slist_processes);
  defsubr (&Sprocess_list);
  defsubr (&Sstart_process);
#ifdef HAVE_SOCKETS
  defsubr (&Sopen_network_stream);
#endif /* HAVE_SOCKETS */
  defsubr (&Saccept_process_output);
  defsubr (&Sprocess_send_region);
  defsubr (&Sprocess_send_string);
  defsubr (&Sinterrupt_process);
  defsubr (&Skill_process);
  defsubr (&Squit_process);
  defsubr (&Sstop_process);
  defsubr (&Scontinue_process);
  defsubr (&Sprocess_send_eof);
  defsubr (&Ssignal_process);
  defsubr (&Swaiting_for_user_input_p);
/*  defsubr (&Sprocess_connection); */
}


#else /* not subprocesses */

#include <sys/types.h>
#include <errno.h>

#include "lisp.h"
#include "systime.h"
#include "termopts.h"
#include "sysselect.h"

extern int frame_garbaged;


/* As described above, except assuming that there are no subprocesses:

   Wait for timeout to elapse and/or keyboard input to be available.

   time_limit is:
     timeout in seconds, or
     zero for no limit, or
     -1 means gobble data immediately available but don't wait for any.

   read_kbd is a Lisp_Object:
     0 to ignore keyboard input, or
     1 to return when input is available, or
     -1 means caller will actually read the input, so don't throw to
       the quit handler.
     We know that read_kbd will never be a Lisp_Process, since
     `subprocesses' isn't defined.

   do_display != 0 means redisplay should be done to show subprocess
   output that arrives.

   Return true iff we received input from any process.  */

int
wait_reading_process_input (time_limit, microsecs, read_kbd, do_display)
     int time_limit, microsecs;
     Lisp_Object read_kbd;
     int do_display;
{
  EMACS_TIME end_time, timeout, *timeout_p;
  int waitchannels;

  /* What does time_limit really mean?  */
  if (time_limit || microsecs)
    {
      /* It's not infinite.  */
      timeout_p = &timeout;

      if (time_limit == -1)
	/* In fact, it's zero.  */
	EMACS_SET_SECS_USECS (timeout, 0, 0);
      else
	EMACS_SET_SECS_USECS (timeout, time_limit, microsecs);

      /* How far in the future is that?  */
      EMACS_GET_TIME (end_time);
      EMACS_ADD_TIME (end_time, end_time, timeout);
    }
  else
    /* It's infinite.  */
    timeout_p = 0;

  /* Turn off periodic alarms (in case they are in use)
     because the select emulator uses alarms.  */
  stop_polling ();

  for (;;)
    {
      int nfds;

      waitchannels = XINT (read_kbd) ? 1 : 0;

      /* If calling from keyboard input, do not quit
	 since we want to return C-g as an input character.
	 Otherwise, do pending quit if requested.  */
      if (XINT (read_kbd) >= 0)
	QUIT;

      if (timeout_p)
	{
	  EMACS_GET_TIME (*timeout_p);
	  EMACS_SUB_TIME (*timeout_p, end_time, *timeout_p);
	  if (EMACS_TIME_NEG_P (*timeout_p))
	    break;
	}

      /* Cause C-g and alarm signals to take immediate action,
	 and cause input available signals to zero out timeout.  */
      if (XINT (read_kbd) < 0)
	set_waiting_for_input (&timeout);

      /* If a frame has been newly mapped and needs updating,
	 reprocess its display stuff.  */
      if (frame_garbaged && do_display)
	redisplay_preserve_echo_area ();

      if (XINT (read_kbd) && detect_input_pending ())
	nfds = 0;
      else
	nfds = select (1, &waitchannels, (SELECT_TYPE *)0, (SELECT_TYPE *)0,
		       timeout_p);

      /* Make C-g and alarm signals set flags again */
      clear_waiting_for_input ();

      /*  If we woke up due to SIGWINCH, actually change size now.  */
      do_pending_window_change ();

      if (nfds == -1)
	{
	  /* If the system call was interrupted, then go around the
	     loop again.  */
	  if (errno == EINTR)
	    waitchannels = 0;
	}
#ifdef sun
      else if (nfds > 0 && (waitchannels & 1)  && interrupt_input)
	/* System sometimes fails to deliver SIGIO.  */
	kill (getpid (), SIGIO);
#endif
#ifdef SIGIO
      if (XINT (read_kbd) && interrupt_input && (waitchannels & 1))
	kill (0, SIGIO);
#endif

      /* If we have timed out (nfds == 0) or found some input (nfds > 0),
	 we should exit.  */
      if (nfds >= 0)
	break;
    }

  start_polling ();

  return 0;
}


DEFUN ("get-buffer-process", Fget_buffer_process, Sget_buffer_process, 1, 1, 0,
  /* Don't confuse make-docfile by having two doc strings for this function.
     make-docfile does not pay attention to #if, for good reason!  */
  0)
  (name)
     register Lisp_Object name;
{
  return Qnil;
}

/* Kill all processes associated with `buffer'.
   If `buffer' is nil, kill all processes.
   Since we have no subprocesses, this does nothing.  */

kill_buffer_processes (buffer)
     Lisp_Object buffer;
{
}

init_process ()
{
}

syms_of_process ()
{
  defsubr (&Sget_buffer_process);
}


#endif /* not subprocesses */