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/* Copyright (C) 2006-2019 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"
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