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
|
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=us-ascii" />
<title>The Apache TPF Port</title>
<style type="text/css">
/*<![CDATA[*/ <!--
.indented { margin-left: 25pt; }
.output { padding-left: 20px; padding-right: 20px; background-color: #dadada; }
.nobr { white-space: nowrap; }
--> /*]]>*/
</style>
</head>
<body>
<center>
<h2><a id="top" name="top"></a> Overview of the Apache TPF Port</h2>
<hr />
[
<a href="#configuration_files">Configuration Files</a>
| <a href="#whats_available">What's Available</a>
| <a href="#cgi">CGI Scripts</a>
| <a href="#options">Options</a>
| <a href="#syslog">Syslog</a>
| <a href="#porting_notes">Porting Notes</a> ]
<hr />
</center>
<p>Apache includes changes allowing it to run on IBM's EBCDIC-based
<a href="http://www.ibm.com/software/ts/tpf/index.html">TPF</a> (Transaction
Processing Facility) operating system. This builds on the
<a href="http://httpd.apache.org/docs/ebcdic.html">EBCDIC changes</a>
previously made to Apache.</p>
<p>Refer to either the <a href="install-tpf.html">TPF4.1 installation</a> or
<a href="install-ztpf.html">z/TPF1.1 installation</a> documents for
step-by-step build instructions.</p>
<p>If you would like to be notified when new versions of Apache are released
consider joining the
<a href="http://httpd.apache.org/lists.html">announcements list</a>.</p><br />
<center>
<h2><a id="configuration_files" name="configuration_files"></a>Apache Configuration Files</h2>
</center>
<h3>Directives</h3>
<p>The distributed configuration files (httpd.conf-dist and mime.types, both
located in the conf subdirectory) work on TPF with the following caveats:</p>
<ul>
<li>Apache on TPF does not support listening on multiple ports.</li>
<li>Performance considerations may dictate lowering the default values for
TimeOut (5 minutes) and KeepAliveTimeout (15 seconds) in order to reduce the
number of active ECBs on your system.</li>
<li>The default value of MaxRequestsPerChild is zero (infinity). A non-zero
value is recommended on TPF to control resource utilization (such as heap
storage) by the long running Apache child ECBs.</li>
<li>Depending on your typical response size, the SendBufferSize directive
can be useful for setting SO_SNDBUF higher than the 32KB default buffer size
for Native Stack.</li>
</ul>
<h3>Restart</h3>
<p>Unlike on Unix systems, newly created Apache child processes on TPF re-read
the various configuration files (such as httpd.conf and mime.types). <br />
Therefore when you change the configuration file(s) you should manually restart
the server to keep the Apache parent process and all child processes in sync.
There are several ways to restart Apache on TPF:</p>
<ul style="list-style: none;">
<li><b>zinet stop/start</b>
<p><tt>zinet stop s-<i>apache</i></tt> followed by a <br />
<tt>zinet start s-<i>apache</i></tt></p>
<p>The Apache parent tells its children to immediately exit, even if they're
processing a request. Once the children exit, the parent exits.</p></li>
<li><b>"stop now" sigterm signal</b>
<p><tt>zfile kill -s sigterm <i>apache_parent_pid</i></tt> or <br />
<tt>zfile kill -s sigterm `cat /usr/local/apache/logs/httpd.pid`</tt></p>
<p>The Apache parent tells its children to immediately exit, even if they're
processing a request. Once the children exit, the parent exits. For the
DAEMON model, InetD (ZINET) will create a new Apache parent to replace the
one that exited.</p></li>
<li><b>"restart now" sighup signal</b>
<p><tt>zfile kill -s sighup <i>apache_parent_pid</i></tt> or <br />
<tt>zfile kill -s sighup `cat /usr/local/apache/logs/httpd.pid`</tt></p>
<p>The Apache parent tells its children to immediately exit, even if they're
processing a request. Then the existing parent re-reads the configuration
file(s) and creates new children to replace the exiting ones.</p></li>
<li><b>"graceful restart" sigusr1 signal</b>
<p><tt>zfile kill -s sigusr1 <i>apache_parent_pid</i></tt> or <br />
<tt>zfile kill -s sigusr1 `cat /usr/local/apache/logs/httpd.pid`</tt></p>
<p>The Apache parent asks its children to exit when they're finished with
any requests they're currently handling. Then the existing parent re-reads
the configuration file(s) and creates new children to replace the exiting
ones.</p>
<p>"Graceful restart" can be used to pick up new configuration files without
disrupting traffic.</p></li>
</ul>
<p>Apache documentation details
<a href="http://httpd.apache.org/docs/1.3/stopping.html">Stopping and Restarting Apache</a>.</p>
<p>Please see the Spring 2006 TPFUG
<a href="http://www.ibm.com/software/htp/tpf/tpfug/tughd.htm">Apache presentation</a>
(in the Open Source section) for TPF diagrams and additional information on
start, stop, and restart.</p><br />
<center>
<h2><a id="whats_available" name="whats_available"></a> What's Available in this Version</h2>
</center>
<p>Unless otherwise noted either TPF4.1 PUT09 or z/TPF1.1 is required for
the server to function on TPF.</p>
<p>The Apache organization provides
<a href="http://httpd.apache.org/docs/">online documentation</a> describing
the various modules and components of the server.</p>
<h3>Components/modules tested on TPF:</h3>
<ul>
<li>alloc.c</li>
<li>ap_base64.c</li>
<li>ap_checkpass.c</li>
<li>ap_cpystrn.c</li>
<li>ap_ebcdic.c</li>
<li>ap_fnmatch.c</li>
<li>ap_md5c.c</li>
<li>ap_sha1.c</li>
<li>ap_signal.c</li>
<li>ap_slack.c</li>
<li>ap_snprintf.c</li>
<li>buff.c</li>
<li>buildmark.c</li>
<li>http_config.c</li>
<li>http_core.c</li>
<li>http_log.c</li>
<li>http_main.c</li>
<li>http_protocol.c</li>
<li>http_request.c</li>
<li>http_vhost.c</li>
<li>logresolve.c <em>(requires TPF4.1 PUT 10 or z/TPF1.1)</em></li>
<li>mod_access.c <em>(Use of mod_access directives "<tt>allow from</tt>" & "<tt>deny from</tt>"
with host <u>names</u> (versus ip addresses) requires TPF4.1 PUT 10 or z/TPF1.1)</em></li>
<li>mod_actions.c</li>
<li>mod_alias.c</li>
<li>mod_asis.c</li>
<li>mod_auth.c</li>
<li>mod_auth_anon.c</li>
<li>mod_autoindex.c</li>
<li>mod_cern_meta.c</li>
<li>mod_cgi.c <em>(requires TPF4.1 PUT 10 or z/TPF1.1)</em></li>
<li>mod_digest.c</li>
<li>mod_dir.c</li>
<li>mod_env.c</li>
<li>mod_example.c</li>
<li>mod_expires.c</li>
<li>mod_headers.c</li>
<li>mod_imap.c</li>
<li>mod_include.c <em>(CGI execution requires TPF4.1 PUT 10 or z/TPF1.1)</em></li>
<li>mod_info.c</li>
<li>mod_log_agent.c</li>
<li>mod_log_config.c</li>
<li>mod_log_forensic.c</li>
<li>mod_log_referer.c</li>
<li>mod_mime.c</li>
<li>mod_mime_magic.c</li>
<li>mod_negotiation.c</li>
<li><a href="http://hpwww.ec-lyon.fr/~vincent/apache/mod_put.html">mod_put.c</a> <em>(third party module)</em></li>
<li>mod_setenvif.c</li>
<li>mod_speling.c</li>
<li>mod_status.c</li>
<li>mod_tpf_shm_static.c <em>(third party module, requires
TPF4.1 PUT 10 or z/TPF1.1)</em></li>
<li>mod_unique_id.c <em>(requires TPF4.1 PUT 10 or z/TPF1.1)</em></li>
<li>mod_userdir.c</li>
<li>mod_usertrack.c</li>
<li>os.c</li>
<li>os-inline.c</li>
<li>regular expression parser <em>(used only on TPF4.1)</em></li>
<li>rfc1413.c</li>
<li>rotatelogs.c <em>(requires TPF4.1 PUT 10 or z/TPF1.1; on TPF4.1,
if PJ27214 is implemented be sure to apply PJ28367)</em></li>
<li>syslog <em>(requires TPF4.1 PUT13 or z/TPF1.1; see
<a href="#syslog">usage</a> instructions)</em></li>
<li>util.c</li>
<li>util_date.c</li>
<li>util_md5.c</li>
<li>util_script.c</li>
<li>util_uri.c</li>
</ul>
<h3>Components/modules not yet supported on TPF:</h3>
<ul>
<li>htdigest.c</li>
<li>htpasswd.c</li>
<li>lib/expat-lite</li>
<li>lib/sdbm</li>
<li>mod_auth_digest.c</li>
<li>mod_proxy.c</li>
<li>mod_rewrite.c</li>
<li>mod_vhost_alias.c</li>
<li>proxy_cache.c</li>
<li>proxy_connect.c</li>
<li>proxy_ftp.c</li>
<li>proxy_http.c</li>
<li>proxy_util.c</li>
</ul>
<h3>Components/modules that don't apply or that probably won't ever be
available on TPF:</h3>
<ul>
<li>ab.c</li>
<li>ap_getpass.c</li>
<li>mod_auth_db.c</li>
<li>mod_auth_dbm.c</li>
<li>mod_auth_db.module</li>
<li>mod_mmap_static.c</li>
<li>mod_so.c</li>
<li>suexec.c</li>
</ul><br />
<center>
<h2><a id="cgi" name="cgi"></a>How to Use CGI Scripts</h2>
</center>
<p>The following is a very simple example of a CGI script ("Hello World") and
the necessary steps to run it.<br />
Refer to the
<a href="http://httpd.apache.org/docs/mod/mod_cgi.html">mod_cgi module</a>
for additional information.</p>
<h3>Add necessary directives to httpd.conf:</h3>
<p>Example:</p>
<p class="indented"><tt>ScriptLog logs/script_log<br />
ScriptAlias /cgi-bin/ /usr/local/apache/cgi-bin/</tt></p>
<p>A request for <tt>http://</tt><i>myserver</i><tt>/cgi-bin/filename.cgi</tt>
would cause the server to run the script
<span class="nobr"><tt>/usr/local/apache/cgi-bin/filename.cgi</tt></span></p>
<h3>Create the CGI script:</h3>
<p>For this example <tt>QZZ1</tt> is the name of the TPF program that will be
executed by the CGI script.<br />
The directory path must match what is in the httpd.conf file for
<tt>ScriptAlias</tt> directive.</p>
<p class="indented"><b><tt>zfile echo "#!QZZ1" > /usr/local/apache/cgi-bin/filename.cgi<br />
zfile cat /usr/local/apache/cgi-bin/filename.cgi </tt></b>
(expected output: <tt>#!QZZ1</tt>)</p>
<h3>Mark the script as executable:</h3>
<p class="indented">
<b><tt>zfile chmod 755 /usr/local/apache/cgi-bin/filename.cgi</tt></b></p>
<h3>Create, load, and activate the CGI program (QZZ1) on TPF:</h3>
<table class="indented" summary="CGI example"><tr><td class="output"><pre>
/* QZZ1-- simple "Hello world" program to demonstrate basic CGI output */
#include <stdio.h>
#include <stdlib.h>
int main() {
/* Print the CGI response header, required for all HTML output. */
/* Note the extra \n, to send the blank line. */
/* Print the HTML response page to STDOUT. */
printf("Content-type: text/html\n\n");
printf("<html>\n");
printf("<head><title>CGI Output</title></head>\n");
printf("<body>\n");
printf("<h1>Hello world.</h1>\n");
printf("</body>\n");
printf("</html>\n");
exit(0);
}
</pre></td></tr></table>
<h3>Request the CGI script from a browser:</h3>
<p class="indented"><tt>http://</tt><i>myserver</i><tt>/cgi-bin/filename.cgi</tt></p>
<center>
<br />
<h2><a id="options" name="options">How to Use Apache's "Dash" Options</a></h2>
</center>
<h3>Overview of Apache's "dash" options:</h3>
<p>Apache can be invoked with various options, such as "-f". Some of these
options display information about the server or perform syntax checks but they
don't actually start the server. These "information only" options are useful
with TPF's ZFILE command line feature: -h, -l, -L, -S, -t, -T, -v, and -V.</p>
<p>Another option, -X, is used when actually running the server. It is passed
to Apache through the ZINET XPARM field since ZINET is the only way to start
the server on TPF.</p>
<p>A third group of options apply to both the informational displays (ZFILE)
and running the server (ZINET XPARM): -d, -D and -f.</p>
<p>The rest of Apache's options are either not applicable or are not supported
on TPF.</p>
<p>On TPF4.1 using dash options requires PJ27277 which shipped on PUT13.</p>
<h3>Table of supported Apache options</h3>
<table border="1" cellpadding="5" summary="Supported Apache options">
<tr>
<td>
<b>Option </b></td>
<td><b>ZFILE</b></td>
<td><b>ZINET</b></td>
<td><b>Description</b></td>
</tr>
<tr>
<td valign="top"><b>-d</b> <i>path</i></td>
<td valign="top">ZFILE</td>
<td valign="top">ZINET</td>
<td valign="top">Set the initial value for the
ServerRoot directive.</td>
</tr>
<tr>
<td valign="top"><b>-D</b> <i>define</i></td>
<td valign="top">ZFILE</td>
<td valign="top">ZINET</td>
<td valign="top">Set a configuration parameter which can be used with
<IfDefine>...</IfDefine> sections in the configuration file to
conditionally skip or process commands.</td>
</tr>
<tr>
<td valign="top"><b>-f</b> <i>filename</i></td>
<td valign="top">ZFILE</td>
<td valign="top">ZINET</td>
<td valign="top">Use an alternate configuration file instead of the default
conf/httpd.conf file.</td>
</tr>
<tr>
<td valign="top"><b>-h</b></td>
<td valign="top">ZFILE</td>
<td valign="top"> </td>
<td valign="top">List a short summary of available command line options then
exit. Note that this outputs all options, not just those supported on TPF.</td>
</tr>
<tr>
<td valign="top"><b>-l</b></td>
<td valign="top">ZFILE</td>
<td valign="top"> </td>
<td valign="top">List modules compiled into the server then exit.</td>
</tr>
<tr>
<td valign="top"><b>-L</b></td>
<td valign="top">ZFILE</td>
<td valign="top"> </td>
<td valign="top">List available configuration directives then exit. Note
that this outputs all configuration directives, not just those supported on
TPF.</td>
</tr>
<tr>
<td valign="top"><b>-S</b></td>
<td valign="top">ZFILE</td>
<td valign="top"> </td>
<td valign="top">Show the settings as parsed from the configuration file
then exit. Currently Apache only shows the virtual host settings.</td>
</tr>
<tr>
<td valign="top"><b>-t</b></td>
<td valign="top">ZFILE</td>
<td valign="top"> </td>
<td valign="top">Run syntax tests for configuration files with document root
checks then exit.</td>
</tr>
<tr>
<td valign="top"><b>-T</b></td>
<td valign="top">ZFILE</td>
<td valign="top"> </td>
<td valign="top">Run syntax tests for configuration
files <i>without</i> document root checks then
exit.</td>
</tr>
<tr>
<td valign="top"><b>-v</b></td>
<td valign="top">ZFILE</td>
<td valign="top"> </td>
<td valign="top">Show the version number then exit.</td>
</tr>
<tr>
<td valign="top"><b>-V</b></td>
<td valign="top">ZFILE</td>
<td valign="top"> </td>
<td valign="top">Show the version number and various compile settings then
exit.</td>
</tr>
<tr>
<td valign="top"><b>-X</b></td>
<td valign="top"> </td>
<td valign="top">ZINET</td>
<td valign="top">Run in single-process mode for internal debugging purposes
only. The parent process does not tpf_fork any children.</td>
</tr>
</table>
<p>See
<a href="http://httpd.apache.org/docs/programs/httpd.html">http://httpd.apache.org/docs/programs/httpd.html</a>
for more information about these command line options.</p>
<h3>Setup for ZFILE examples:</h3>
<p>Ensure Apache (CHTA) is loaded.</p>
<p>Create the httpd script:</p>
<p class="indented"><b><tt>zfile echo "#!CHTA" > /bin/httpd<br />
zfile cat /bin/httpd </tt></b>
(expected output: <tt>#!CHTA</tt>)</p>
<p class="indented">(See "ZFILE-Activate a TPF Segment or Script" in the
<a href="http://www.ibm.com/tpf/pubs/tpfpubs.htm">IBM TPF Information Center</a>
for additional information.)</p>
<p>Mark the script as executable:</p>
<p class="indented"><b><tt>zfile chmod 755 /bin/httpd</tt></b></p>
<h3>ZFILE example 1:</h3>
<p class="indented"><b><tt>zfile httpd -v</tt></b></p>
<table class="indented" summary="ZFILE example 1"><tr><td class="output"><pre>
FILE0001I 11.43.09 START OF DISPLAY FROM httpd -v
Server version: Apache/1.3.20 (TPF)
Server built: May 23 2001 09:39:22
END OF DISPLAY
</pre></td></tr></table>
<h3>ZFILE example 2:</h3>
<p class="indented"><b><tt>zfile httpd -t -f /usr/local/apache/conf/alt.conf</tt></b></p>
<table class="indented" summary="ZFILE example 2">
<tr>
<td class="output"><pre>
FILE0002I 11.47.26 START OF ERROR DISPLAY FROM httpd -t ...
Syntax OK
END OF DISPLAY
</pre></td>
</tr>
</table>
<h3>ZINET XPARM example:</h3>
<p>This example uses an alternate configuration file called
/usr/local/apache/conf/alt.conf.</p>
<p>Create and transfer your alternate configuration file to your TPF test system.</p>
<p>Add and start Apache using <tt>ZINET</tt> commands:</p>
<p class="indented"><b><tt>zinet add s-<i>apache</i> pgm-<i>chta</i>
model-daemon user-root xparm--f conf/alt.conf<br />
zinet start s-<i>apache</i></tt></b></p>
<p>(See "ZINET ADD-Add an Internet Server Application Entry" and "ZINET
ALTER-Change an Internet Server Application Entry" in the
<a href="http://www.ibm.com/tpf/pubs/tpfpubs.htm">IBM TPF Information Center</a>
for more information about using the XPARM field.)</p><br />
<center>
<h2><a id="syslog" name="syslog"></a>Syslog Daemon</h2>
</center>
<h3>Syslog overview:</h3>
<p>The syslog daemon is a server process that provides a message logging
facility for application and system processes. It can be used to write
messages to log files or to tapes. See "Operating the Syslog Daemon" in the
<a href="http://www.ibm.com/tpf/pubs/tpfpubs.htm">IBM TPF Information Center</a>.
And see the Apache ErrorLog
<a href="http://httpd.apache.org/docs/mod/core.html">directive documentation</a>
for details on how to use syslog with Apache.</p>
<p>On TPF4.1 syslog capabilities were added with PJ27214 which shipped with
PUT13. You must follow the
<a href="install-tpf.html#syslog">TPF4.1 syslog-specific installation instructions</a>
in order to have the option of using syslog with Apache on a TPF4.1 system.
No additional installation steps are needed for z/TPF1.1 systems.</p>
<h3>Tips on using syslog with your Apache error log:</h3>
<p>This section provides some tips on using syslog with Apache.
It is not meant to replace the syslog documentation in the TPF TCP/IP publication.</p>
<ul>
<li>The syslog daemon will not create files. If you are logging to a file
(as specified in the <tt>syslog.conf</tt> configuration file) that file must
already exist and have permissions that allow the syslog daemon to write to
it.</li>
<li>You must restart the syslog daemon for it to recognize changes to its
<tt>syslog.conf</tt> configuration file.</li>
<li>The syslog daemon must be active prior to starting Apache.</li>
<li>To indicate you want to use syslog with your Apache error log add the
following directive to your <tt>httpd.conf</tt> file:
"<tt>ErrorLog syslog:</tt><i>facility</i>" where <i>facility</i> is
"local0" through "local7".</li>
<li>Apache will default the facility to "local7" if you omit the facility
name from the ErrorLog directive (that is "<tt>ErrorLog syslog</tt>").</li>
<li>The syslog facility name must be one that is recognized by both Apache
and the syslog.h header file. The facility names "local0" through "local7"
are explicitly set aside for your use.</li>
<li>Although "local0" through "local7" are recommended user
facility names, here is the complete list of names recognized by both
Apache and TPF's syslog.h: auth, cron, daemon, kern, local0, local1,
local2, local3, local4, local5, local6, local7, lpr, mail, news,
syslog, user, and uucp.</li>
<li>You won't see the normal Apache startup/shutdown messages when you
use syslog with your Apache error log.</li>
<li>Syslog does not support TCP/IP Offload devices (ZCLAW;
<em>used only on TPF4.1</em>)</li>
</ul><br />
<center>
<h2><a id="porting_notes" name="porting_notes"></a>Porting Notes</h2>
</center>
<h3>Changes made due to differences between UNIX and TPF's process models:</h3>
<ul>
<li><p><b>Signals</b>: On TPF a signal sent to a process remains
unhandled until the process explicitly requests that signals be
handled using the <tt>tpf_process_signals()</tt> function.<br />
Additionally, the default action for an alarm on TPF4.1 without
PJ30263 applied is to take an OPR-7777 dump and exit.<br />
On UNIX, z/TPF, and TPF4.1 with PJ30263 applied the default is the
equivalent of <tt>exit()</tt> with no dump taken.</p></li>
<li><p><b>Find that function...</b> Some simple functions &
definitions needed to be added on TPF. They are in src/os/tpf/os.h.</p></li>
<li><p><b>EBCDIC changes:</b> TPF-specific conversion tables between
US-ASCII and EBCDIC (character set IBM-1047 to be exact) were created.</p></li>
<li><p><b>Miscellaneous, minor changes:</b> Various minor changes
(such as casting) were made due to differences in how some functions
are implemented on TPF.</p></li>
</ul>
<br />
<hr />
<center>
[ <a href="#top">top</a>
| <a href="#configuration_files">Configuration Files</a>
| <a href="#whats_available">What's Available</a>
| <a href="#cgi">CGI Scripts</a>
| <a href="#options">Options</a>
| <a href="#syslog">Syslog</a>
| <a href="#porting_notes">Porting Notes</a> ]
</center>
<hr />
</body>
</html>
|
