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glibc/misc/tst-pselect.c
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#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; | |
if (sigaction (SIGCHLD, &sa, NULL) != 0) | |
{ | |
puts ("2nd sigaction failed"); | |
return 1; | |
} | |
sigset_t ss_usr1; | |
sigemptyset (&ss_usr1); | |
sigaddset (&ss_usr1, SIGUSR1); | |
if (sigprocmask (SIG_BLOCK, &ss_usr1, NULL) != 0) | |
{ | |
puts ("sigprocmask 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" |