blob: 981818c77ca84324b812b2e7341a9c0bd7d6c844 [file] [log] [blame]
/*
* Check decoding of wait4 syscall.
*
* Copyright (c) 2015-2016 Dmitry V. Levin <ldv@altlinux.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "tests.h"
#include <assert.h>
#include <signal.h>
#include <stdio.h>
#include <unistd.h>
#include <sys/wait.h>
#include <sys/resource.h>
static const char *
sprint_rusage(const struct rusage *const ru)
{
static char buf[1024];
snprintf(buf, sizeof(buf),
"{ru_utime={%lu, %lu}"
", ru_stime={%lu, %lu}"
#ifdef VERBOSE_RUSAGE
", ru_maxrss=%lu"
", ru_ixrss=%lu"
", ru_idrss=%lu"
", ru_isrss=%lu"
", ru_minflt=%lu"
", ru_majflt=%lu"
", ru_nswap=%lu"
", ru_inblock=%lu"
", ru_oublock=%lu"
", ru_msgsnd=%lu"
", ru_msgrcv=%lu"
", ru_nsignals=%lu"
", ru_nvcsw=%lu"
", ru_nivcsw=%lu}"
#else
", ...}"
#endif
, (long) ru->ru_utime.tv_sec
, (long) ru->ru_utime.tv_usec
, (long) ru->ru_stime.tv_sec
, (long) ru->ru_stime.tv_usec
#ifdef VERBOSE_RUSAGE
, (long) ru->ru_maxrss
, (long) ru->ru_ixrss
, (long) ru->ru_idrss
, (long) ru->ru_isrss
, (long) ru->ru_minflt
, (long) ru->ru_majflt
, (long) ru->ru_nswap
, (long) ru->ru_inblock
, (long) ru->ru_oublock
, (long) ru->ru_msgsnd
, (long) ru->ru_msgrcv
, (long) ru->ru_nsignals
, (long) ru->ru_nvcsw
, (long) ru->ru_nivcsw
#endif
);
return buf;
}
static pid_t
do_wait4(pid_t pid, int *wstatus, int options, struct rusage *ru)
{
sigset_t mask = {};
sigaddset(&mask, SIGCHLD);
assert(sigprocmask(SIG_BLOCK, &mask, NULL) == 0);
pid_t rc = wait4(pid, wstatus, options, ru);
assert(sigprocmask(SIG_UNBLOCK, &mask, NULL) == 0);
return rc;
}
int
main(void)
{
tprintf("%s", "");
int fds[2];
if (pipe(fds))
perror_msg_and_fail("pipe");
pid_t pid;
pid = fork();
if (pid < 0)
perror_msg_and_fail("fork");
if (!pid) {
char c;
(void) close(1);
assert(read(0, &c, sizeof(c)) == 1);
return 42;
}
(void) close(0);
int *const s = tail_alloc(sizeof(*s));
if (wait4(pid, s, WNOHANG|__WALL, NULL))
perror_msg_and_fail("wait4 #1");
tprintf("wait4(%d, %p, WNOHANG|__WALL, NULL) = 0\n", pid, s);
struct rusage *const rusage = tail_alloc(sizeof(*rusage));
if (wait4(pid, s, WNOHANG|__WALL, rusage))
perror_msg_and_fail("wait4 #2");
tprintf("wait4(%d, %p, WNOHANG|__WALL, %p) = 0\n", pid, s, rusage);
assert(write(1, "", 1) == 1);
(void) close(1);
assert(do_wait4(pid, s, 0, rusage) == pid);
assert(WIFEXITED(*s) && WEXITSTATUS(*s) == 42);
tprintf("wait4(%d, [{WIFEXITED(s) && WEXITSTATUS(s) == 42}], 0, %s)"
" = %d\n", pid, sprint_rusage(rusage), pid);
pid = fork();
if (pid < 0)
perror_msg_and_fail("fork");
if (!pid) {
(void) raise(SIGUSR1);
return 1;
}
assert(do_wait4(pid, s, __WALL, rusage) == pid);
assert(WIFSIGNALED(*s) && WTERMSIG(*s) == SIGUSR1);
tprintf("wait4(%d, [{WIFSIGNALED(s) && WTERMSIG(s) == SIGUSR1}]"
", __WALL, %s) = %d\n", pid, sprint_rusage(rusage), pid);
if (pipe(fds))
perror_msg_and_fail("pipe");
pid = fork();
if (pid < 0)
perror_msg_and_fail("fork");
if (!pid) {
(void) close(1);
raise(SIGSTOP);
char c;
assert(read(0, &c, sizeof(c)) == 1);
return 0;
}
(void) close(0);
assert(do_wait4(pid, s, WSTOPPED, rusage) == pid);
assert(WIFSTOPPED(*s) && WSTOPSIG(*s) == SIGSTOP);
tprintf("wait4(%d, [{WIFSTOPPED(s) && WSTOPSIG(s) == SIGSTOP}]"
", WSTOPPED, %s) = %d\n", pid, sprint_rusage(rusage), pid);
if (kill(pid, SIGCONT))
perror_msg_and_fail("kill(SIGCONT)");
#if defined WCONTINUED && defined WIFCONTINUED
assert(do_wait4(pid, s, WCONTINUED, rusage) == pid);
assert(WIFCONTINUED(*s));
tprintf("wait4(%d, [{WIFCONTINUED(s)}], WCONTINUED"
", %s) = %d\n", pid, sprint_rusage(rusage), pid);
#endif /* WCONTINUED && WIFCONTINUED */
assert(write(1, "", 1) == 1);
(void) close(1);
assert(do_wait4(pid, s, 0, rusage) == pid);
assert(WIFEXITED(*s) && WEXITSTATUS(*s) == 0);
tprintf("wait4(%d, [{WIFEXITED(s) && WEXITSTATUS(s) == 0}], 0"
", %s) = %d\n", pid, sprint_rusage(rusage), pid);
assert(wait4(-1, s, WNOHANG|WSTOPPED|__WALL, rusage) == -1);
tprintf("wait4(-1, %p, WNOHANG|WSTOPPED|__WALL, %p) = -1 %s (%m)\n",
s, rusage, errno2name());
tprintf("%s\n", "+++ exited with 0 +++");
return 0;
}