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
|
#include <errno.h>
#include <signal.h>
#include <stdio.h>
#include <unistd.h>
#include <sys/select.h>
#include <sys/wait.h>
#include <stdlib.h>
static volatile int handler_called;
static void
handler (int sig)
{
handler_called = 1;
}
static int
do_test (void)
{
struct sigaction sa;
sa.sa_handler = handler;
sa.sa_flags = 0;
sigemptyset (&sa.sa_mask);
if (sigaction (SIGUSR1, &sa, NULL) != 0)
{
puts ("sigaction failed");
return 1;
}
sa.sa_handler = SIG_IGN;
sa.sa_flags = SA_NOCLDWAIT;
if (sigaction (SIGCHLD, &sa, NULL) != 0)
{
puts ("2nd sigaction failed");
return 1;
}
if (sigblock (sigmask (SIGUSR1)) != 0)
{
puts ("sigblock failed");
return 1;
}
int fds[2][2];
if (pipe (fds[0]) != 0 || pipe (fds[1]) != 0)
{
puts ("pipe failed");
return 1;
}
fd_set rfds;
FD_ZERO (&rfds);
sigset_t ss;
sigprocmask (SIG_SETMASK, NULL, &ss);
sigdelset (&ss, SIGUSR1);
struct timespec to = { .tv_sec = 0, .tv_nsec = 500000000 };
pid_t parent = getpid ();
pid_t p = fork ();
if (p == 0)
{
close (fds[0][1]);
close (fds[1][0]);
FD_SET (fds[0][0], &rfds);
int e;
do
{
if (getppid () != parent)
exit (2);
errno = 0;
e = pselect (fds[0][0] + 1, &rfds, NULL, NULL, &to, &ss);
}
while (e == 0);
if (e != -1)
{
puts ("child: pselect did not fail");
return 0;
}
if (errno != EINTR)
{
puts ("child: pselect did not set errno to EINTR");
return 0;
}
TEMP_FAILURE_RETRY (write (fds[1][1], "foo", 3));
exit (0);
}
close (fds[0][0]);
close (fds[1][1]);
FD_SET (fds[1][0], &rfds);
kill (p, SIGUSR1);
int e = pselect (fds[1][0] + 1, &rfds, NULL, NULL, NULL, &ss);
if (e == -1)
{
puts ("parent: pselect failed");
return 1;
}
if (e != 1)
{
puts ("parent: pselect did not report readable fd");
return 1;
}
if (!FD_ISSET (fds[1][0], &rfds))
{
puts ("parent: pselect reports wrong fd");
return 1;
}
return 0;
}
#define TEST_FUNCTION do_test ()
#include "../test-skeleton.c"
|
