mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-24 14:00:30 +00:00
148 lines
2.9 KiB
C
148 lines
2.9 KiB
C
/* Copyright (C) 2006-2020 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library 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
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#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"
|