mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-10 07:10:06 +00:00
514 lines
13 KiB
C
514 lines
13 KiB
C
/* Tests for waitid.
|
|
Copyright (C) 2004 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
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include <errno.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
#include <sys/wait.h>
|
|
#include <signal.h>
|
|
|
|
#define TIMEOUT 15
|
|
|
|
static void
|
|
test_child (void)
|
|
{
|
|
/* Wait a second to be sure the parent set his variables before we
|
|
produce a SIGCHLD. */
|
|
sleep (1);
|
|
|
|
/* First thing, we stop ourselves. */
|
|
raise (SIGSTOP);
|
|
|
|
/* Hey, we got continued! */
|
|
while (1)
|
|
pause ();
|
|
}
|
|
|
|
#ifndef WEXITED
|
|
# define WEXITED 0
|
|
# define WCONTINUED 0
|
|
# define WSTOPPED WUNTRACED
|
|
#endif
|
|
|
|
static sig_atomic_t expecting_sigchld, spurious_sigchld;
|
|
#ifdef SA_SIGINFO
|
|
static siginfo_t sigchld_info;
|
|
|
|
static void
|
|
sigchld (int signo, siginfo_t *info, void *ctx)
|
|
{
|
|
if (signo != SIGCHLD)
|
|
{
|
|
printf ("SIGCHLD handler got signal %d instead!\n", signo);
|
|
_exit (EXIT_FAILURE);
|
|
}
|
|
|
|
if (! expecting_sigchld)
|
|
{
|
|
spurious_sigchld = 1;
|
|
printf ("spurious SIGCHLD: signo %d code %d status %d pid %d\n",
|
|
info->si_signo, info->si_code, info->si_status, info->si_pid);
|
|
}
|
|
else
|
|
{
|
|
sigchld_info = *info;
|
|
expecting_sigchld = 0;
|
|
}
|
|
}
|
|
|
|
static void
|
|
check_sigchld (const char *phase, int *ok, int code, int status, pid_t pid)
|
|
{
|
|
if (expecting_sigchld)
|
|
{
|
|
printf ("missing SIGCHLD on %s\n", phase);
|
|
*ok = EXIT_FAILURE;
|
|
expecting_sigchld = 0;
|
|
return;
|
|
}
|
|
|
|
if (sigchld_info.si_signo != SIGCHLD)
|
|
{
|
|
printf ("SIGCHLD for %s signal %d\n", phase, sigchld_info.si_signo);
|
|
*ok = EXIT_FAILURE;
|
|
}
|
|
if (sigchld_info.si_code != code)
|
|
{
|
|
printf ("SIGCHLD for %s code %d\n", phase, sigchld_info.si_code);
|
|
*ok = EXIT_FAILURE;
|
|
}
|
|
if (sigchld_info.si_status != status)
|
|
{
|
|
printf ("SIGCHLD for %s status %d\n", phase, sigchld_info.si_status);
|
|
*ok = EXIT_FAILURE;
|
|
}
|
|
if (sigchld_info.si_pid != pid)
|
|
{
|
|
printf ("SIGCHLD for %s pid %d\n", phase, sigchld_info.si_pid);
|
|
*ok = EXIT_FAILURE;
|
|
}
|
|
}
|
|
# define CHECK_SIGCHLD(phase, code_check, status_check) \
|
|
check_sigchld ((phase), &status, (code_check), (status_check), pid)
|
|
#else
|
|
# define CHECK_SIGCHLD(phase, code, status) ((void) 0)
|
|
#endif
|
|
|
|
static int
|
|
do_test (int argc, char *argv[])
|
|
{
|
|
#ifdef SA_SIGINFO
|
|
struct sigaction sa;
|
|
sa.sa_flags = SA_SIGINFO|SA_RESTART;
|
|
sa.sa_sigaction = &sigchld;
|
|
if (sigemptyset (&sa.sa_mask) < 0 || sigaction (SIGCHLD, &sa, NULL) < 0)
|
|
{
|
|
printf ("setting SIGCHLD handler: %m\n");
|
|
return EXIT_FAILURE;
|
|
}
|
|
#endif
|
|
|
|
expecting_sigchld = 1;
|
|
|
|
pid_t pid = fork ();
|
|
if (pid < 0)
|
|
{
|
|
printf ("fork: %m\n");
|
|
return EXIT_FAILURE;
|
|
}
|
|
else if (pid == 0)
|
|
{
|
|
test_child ();
|
|
_exit (127);
|
|
}
|
|
|
|
int status = EXIT_SUCCESS;
|
|
#define RETURN(ok) \
|
|
do { if (status == EXIT_SUCCESS) status = (ok); goto out; } while (0)
|
|
|
|
/* Give the child a chance to stop. */
|
|
sleep (3);
|
|
|
|
CHECK_SIGCHLD ("stopped", CLD_STOPPED, SIGSTOP);
|
|
|
|
/* Now try a wait that should not succeed. */
|
|
siginfo_t info;
|
|
info.si_signo = 0; /* A successful call sets it to SIGCHLD. */
|
|
int fail = waitid (P_PID, pid, &info, WEXITED|WCONTINUED|WNOHANG);
|
|
switch (fail)
|
|
{
|
|
default:
|
|
printf ("waitid returned bogus value %d\n", fail);
|
|
RETURN (EXIT_FAILURE);
|
|
case -1:
|
|
printf ("waitid WNOHANG on stopped: %m\n");
|
|
RETURN (errno == ENOTSUP ? EXIT_SUCCESS : EXIT_FAILURE);
|
|
case 0:
|
|
if (info.si_signo == 0)
|
|
break;
|
|
if (info.si_signo == SIGCHLD)
|
|
printf ("waitid WNOHANG on stopped status %d\n", info.si_status);
|
|
else
|
|
printf ("waitid WNOHANG on stopped signal %d\n", info.si_signo);
|
|
RETURN (EXIT_FAILURE);
|
|
}
|
|
|
|
/* Next the wait that should succeed right away. */
|
|
info.si_signo = 0; /* A successful call sets it to SIGCHLD. */
|
|
info.si_pid = -1;
|
|
info.si_status = -1;
|
|
fail = waitid (P_PID, pid, &info, WSTOPPED|WNOHANG);
|
|
switch (fail)
|
|
{
|
|
default:
|
|
printf ("waitid WSTOPPED|WNOHANG returned bogus value %d\n", fail);
|
|
RETURN (EXIT_FAILURE);
|
|
case -1:
|
|
printf ("waitid WSTOPPED|WNOHANG on stopped: %m\n");
|
|
RETURN (errno == ENOTSUP ? EXIT_SUCCESS : EXIT_FAILURE);
|
|
case 0:
|
|
if (info.si_signo != SIGCHLD)
|
|
{
|
|
printf ("waitid WSTOPPED|WNOHANG on stopped signal %d\n",
|
|
info.si_signo);
|
|
RETURN (EXIT_FAILURE);
|
|
}
|
|
if (info.si_code != CLD_STOPPED)
|
|
{
|
|
printf ("waitid WSTOPPED|WNOHANG on stopped code %d\n",
|
|
info.si_code);
|
|
RETURN (EXIT_FAILURE);
|
|
}
|
|
if (info.si_status != SIGSTOP)
|
|
{
|
|
printf ("waitid WSTOPPED|WNOHANG on stopped status %d\n",
|
|
info.si_status);
|
|
RETURN (EXIT_FAILURE);
|
|
}
|
|
if (info.si_pid != pid)
|
|
{
|
|
printf ("waitid WSTOPPED|WNOHANG on stopped pid %d != %d\n",
|
|
info.si_pid, pid);
|
|
RETURN (EXIT_FAILURE);
|
|
}
|
|
}
|
|
|
|
expecting_sigchld = WCONTINUED != 0;
|
|
|
|
if (kill (pid, SIGCONT) != 0)
|
|
{
|
|
printf ("kill (%d, SIGCONT): %m\n", pid);
|
|
RETURN (EXIT_FAILURE);
|
|
}
|
|
|
|
/* Wait for the child to have continued. */
|
|
sleep (2);
|
|
|
|
#if WCONTINUED != 0
|
|
if (expecting_sigchld)
|
|
{
|
|
printf ("no SIGCHLD seen for SIGCONT (optional)\n");
|
|
expecting_sigchld = 0;
|
|
}
|
|
else
|
|
CHECK_SIGCHLD ("continued", CLD_CONTINUED, SIGCONT);
|
|
|
|
info.si_signo = 0; /* A successful call sets it to SIGCHLD. */
|
|
info.si_pid = -1;
|
|
info.si_status = -1;
|
|
fail = waitid (P_PID, pid, &info, WCONTINUED|WNOWAIT);
|
|
switch (fail)
|
|
{
|
|
default:
|
|
printf ("waitid WCONTINUED|WNOWAIT returned bogus value %d\n", fail);
|
|
RETURN (EXIT_FAILURE);
|
|
case -1:
|
|
printf ("waitid WCONTINUED|WNOWAIT on continued: %m\n");
|
|
RETURN (errno == ENOTSUP ? EXIT_SUCCESS : EXIT_FAILURE);
|
|
case 0:
|
|
if (info.si_signo != SIGCHLD)
|
|
{
|
|
printf ("waitid WCONTINUED|WNOWAIT on continued signal %d\n",
|
|
info.si_signo);
|
|
RETURN (EXIT_FAILURE);
|
|
}
|
|
if (info.si_code != CLD_CONTINUED)
|
|
{
|
|
printf ("waitid WCONTINUED|WNOWAIT on continued code %d\n",
|
|
info.si_code);
|
|
RETURN (EXIT_FAILURE);
|
|
}
|
|
if (info.si_status != SIGCONT)
|
|
{
|
|
printf ("waitid WCONTINUED|WNOWAIT on continued status %d\n",
|
|
info.si_status);
|
|
RETURN (EXIT_FAILURE);
|
|
}
|
|
if (info.si_pid != pid)
|
|
{
|
|
printf ("waitid WCONTINUED|WNOWAIT on continued pid %d != %d\n",
|
|
info.si_pid, pid);
|
|
RETURN (EXIT_FAILURE);
|
|
}
|
|
}
|
|
|
|
/* That should leave the CLD_CONTINUED state waiting to be seen again. */
|
|
info.si_signo = 0; /* A successful call sets it to SIGCHLD. */
|
|
info.si_pid = -1;
|
|
info.si_status = -1;
|
|
fail = waitid (P_PID, pid, &info, WCONTINUED);
|
|
switch (fail)
|
|
{
|
|
default:
|
|
printf ("waitid WCONTINUED returned bogus value %d\n", fail);
|
|
RETURN (EXIT_FAILURE);
|
|
case -1:
|
|
printf ("waitid WCONTINUED on continued: %m\n");
|
|
RETURN (errno == ENOTSUP ? EXIT_SUCCESS : EXIT_FAILURE);
|
|
case 0:
|
|
if (info.si_signo != SIGCHLD)
|
|
{
|
|
printf ("waitid WCONTINUED on continued signal %d\n", info.si_signo);
|
|
RETURN (EXIT_FAILURE);
|
|
}
|
|
if (info.si_code != CLD_CONTINUED)
|
|
{
|
|
printf ("waitid WCONTINUED on continued code %d\n", info.si_code);
|
|
RETURN (EXIT_FAILURE);
|
|
}
|
|
if (info.si_status != SIGCONT)
|
|
{
|
|
printf ("waitid WCONTINUED on continued status %d\n",
|
|
info.si_status);
|
|
RETURN (EXIT_FAILURE);
|
|
}
|
|
if (info.si_pid != pid)
|
|
{
|
|
printf ("waitid WCONTINUED on continued pid %d != %d\n",
|
|
info.si_pid, pid);
|
|
RETURN (EXIT_FAILURE);
|
|
}
|
|
}
|
|
|
|
/* Now try a wait that should not succeed. */
|
|
info.si_signo = 0; /* A successful call sets it to SIGCHLD. */
|
|
fail = waitid (P_PID, pid, &info, WCONTINUED|WNOHANG);
|
|
switch (fail)
|
|
{
|
|
default:
|
|
printf ("waitid returned bogus value %d\n", fail);
|
|
RETURN (EXIT_FAILURE);
|
|
case -1:
|
|
printf ("waitid WCONTINUED|WNOHANG on waited continued: %m\n");
|
|
RETURN (errno == ENOTSUP ? EXIT_SUCCESS : EXIT_FAILURE);
|
|
case 0:
|
|
if (info.si_signo == 0)
|
|
break;
|
|
if (info.si_signo == SIGCHLD)
|
|
printf ("waitid WCONTINUED|WNOHANG on waited continued status %d\n",
|
|
info.si_status);
|
|
else
|
|
printf ("waitid WCONTINUED|WNOHANG on waited continued signal %d\n",
|
|
info.si_signo);
|
|
RETURN (EXIT_FAILURE);
|
|
}
|
|
|
|
/* Now stop him again and test waitpid with WCONTINUED. */
|
|
expecting_sigchld = 1;
|
|
if (kill (pid, SIGSTOP) != 0)
|
|
{
|
|
printf ("kill (%d, SIGSTOP): %m\n", pid);
|
|
RETURN (EXIT_FAILURE);
|
|
}
|
|
pid_t wpid = waitpid (pid, &fail, WUNTRACED);
|
|
if (wpid < 0)
|
|
{
|
|
printf ("waitpid WUNTRACED on stopped: %m\n");
|
|
RETURN (EXIT_FAILURE);
|
|
}
|
|
else if (wpid != pid)
|
|
{
|
|
printf ("waitpid WUNTRACED on stopped returned %d != %d (status %x)\n",
|
|
wpid, pid, fail);
|
|
RETURN (EXIT_FAILURE);
|
|
}
|
|
else if (!WIFSTOPPED (fail) || WIFSIGNALED (fail) || WIFEXITED (fail)
|
|
|| WIFCONTINUED (fail) || WSTOPSIG (fail) != SIGSTOP)
|
|
{
|
|
printf ("waitpid WUNTRACED on stopped: status %x\n", fail);
|
|
RETURN (EXIT_FAILURE);
|
|
}
|
|
CHECK_SIGCHLD ("stopped", CLD_STOPPED, SIGSTOP);
|
|
|
|
expecting_sigchld = 1;
|
|
if (kill (pid, SIGCONT) != 0)
|
|
{
|
|
printf ("kill (%d, SIGCONT): %m\n", pid);
|
|
RETURN (EXIT_FAILURE);
|
|
}
|
|
|
|
/* Wait for the child to have continued. */
|
|
sleep (2);
|
|
|
|
if (expecting_sigchld)
|
|
{
|
|
printf ("no SIGCHLD seen for SIGCONT (optional)\n");
|
|
expecting_sigchld = 0;
|
|
}
|
|
else
|
|
CHECK_SIGCHLD ("continued", CLD_CONTINUED, SIGCONT);
|
|
|
|
wpid = waitpid (pid, &fail, WCONTINUED);
|
|
if (wpid < 0)
|
|
{
|
|
if (errno == EINVAL)
|
|
printf ("waitpid does not support WCONTINUED\n");
|
|
else
|
|
{
|
|
printf ("waitpid WCONTINUED on continued: %m\n");
|
|
RETURN (EXIT_FAILURE);
|
|
}
|
|
}
|
|
else if (wpid != pid)
|
|
{
|
|
printf ("\
|
|
waitpid WCONTINUED on continued returned %d != %d (status %x)\n",
|
|
wpid, pid, fail);
|
|
RETURN (EXIT_FAILURE);
|
|
}
|
|
else if (WIFSTOPPED (fail) || WIFSIGNALED (fail) || WIFEXITED (fail)
|
|
|| !WIFCONTINUED (fail))
|
|
{
|
|
printf ("waitpid WCONTINUED on continued: status %x\n", fail);
|
|
RETURN (EXIT_FAILURE);
|
|
}
|
|
#endif
|
|
|
|
expecting_sigchld = 1;
|
|
|
|
/* Die, child, die! */
|
|
if (kill (pid, SIGKILL) != 0)
|
|
{
|
|
printf ("kill (%d, SIGKILL): %m\n", pid);
|
|
RETURN (EXIT_FAILURE);
|
|
}
|
|
|
|
#ifdef WNOWAIT
|
|
info.si_signo = 0; /* A successful call sets it to SIGCHLD. */
|
|
info.si_pid = -1;
|
|
info.si_status = -1;
|
|
fail = waitid (P_PID, pid, &info, WEXITED|WNOWAIT);
|
|
switch (fail)
|
|
{
|
|
default:
|
|
printf ("waitid WNOWAIT returned bogus value %d\n", fail);
|
|
RETURN (EXIT_FAILURE);
|
|
case -1:
|
|
printf ("waitid WNOWAIT on killed: %m\n");
|
|
RETURN (errno == ENOTSUP ? EXIT_SUCCESS : EXIT_FAILURE);
|
|
case 0:
|
|
if (info.si_signo != SIGCHLD)
|
|
{
|
|
printf ("waitid WNOWAIT on killed signal %d\n", info.si_signo);
|
|
RETURN (EXIT_FAILURE);
|
|
}
|
|
if (info.si_code != CLD_KILLED)
|
|
{
|
|
printf ("waitid WNOWAIT on killed code %d\n", info.si_code);
|
|
RETURN (EXIT_FAILURE);
|
|
}
|
|
if (info.si_status != SIGKILL)
|
|
{
|
|
printf ("waitid WNOWAIT on killed status %d\n", info.si_status);
|
|
RETURN (EXIT_FAILURE);
|
|
}
|
|
if (info.si_pid != pid)
|
|
{
|
|
printf ("waitid WNOWAIT on killed pid %d != %d\n", info.si_pid, pid);
|
|
RETURN (EXIT_FAILURE);
|
|
}
|
|
}
|
|
#else
|
|
/* Allow enough time to be sure the child died; we didn't synchronize. */
|
|
sleep (2);
|
|
#endif
|
|
|
|
CHECK_SIGCHLD ("killed", CLD_KILLED, SIGKILL);
|
|
|
|
info.si_signo = 0; /* A successful call sets it to SIGCHLD. */
|
|
info.si_pid = -1;
|
|
info.si_status = -1;
|
|
fail = waitid (P_PID, pid, &info, WEXITED|WNOHANG);
|
|
switch (fail)
|
|
{
|
|
default:
|
|
printf ("waitid WNOHANG returned bogus value %d\n", fail);
|
|
RETURN (EXIT_FAILURE);
|
|
case -1:
|
|
printf ("waitid WNOHANG on killed: %m\n");
|
|
RETURN (EXIT_FAILURE);
|
|
case 0:
|
|
if (info.si_signo != SIGCHLD)
|
|
{
|
|
printf ("waitid WNOHANG on killed signal %d\n", info.si_signo);
|
|
RETURN (EXIT_FAILURE);
|
|
}
|
|
if (info.si_code != CLD_KILLED)
|
|
{
|
|
printf ("waitid WNOHANG on killed code %d\n", info.si_code);
|
|
RETURN (EXIT_FAILURE);
|
|
}
|
|
if (info.si_status != SIGKILL)
|
|
{
|
|
printf ("waitid WNOHANG on killed status %d\n", info.si_status);
|
|
RETURN (EXIT_FAILURE);
|
|
}
|
|
if (info.si_pid != pid)
|
|
{
|
|
printf ("waitid WNOHANG on killed pid %d != %d\n", info.si_pid, pid);
|
|
RETURN (EXIT_FAILURE);
|
|
}
|
|
}
|
|
|
|
fail = waitid (P_PID, pid, &info, WEXITED);
|
|
if (fail == -1)
|
|
{
|
|
if (errno != ECHILD)
|
|
{
|
|
printf ("waitid WEXITED on killed: %m\n");
|
|
RETURN (EXIT_FAILURE);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
printf ("waitid WEXITED returned bogus value %d\n", fail);
|
|
RETURN (EXIT_FAILURE);
|
|
}
|
|
|
|
#undef RETURN
|
|
out:
|
|
if (spurious_sigchld)
|
|
status = EXIT_FAILURE;
|
|
signal (SIGCHLD, SIG_IGN);
|
|
kill (pid, SIGKILL); /* Make sure it's dead if we bailed early. */
|
|
return status;
|
|
}
|
|
|
|
#include "../test-skeleton.c"
|