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/*
* Check decoding of waitid 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 <string.h>
#include <unistd.h>
#include <sys/wait.h>
#include <sys/resource.h>
#include <sys/syscall.h>
static const char *
sprint_rusage(const struct rusage *const ru)
{
static char buf[1024];
snprintf(buf, sizeof(buf),
"{ru_utime={%llu, %llu}"
", ru_stime={%llu, %llu}"
#ifdef VERBOSE_RUSAGE
", ru_maxrss=%llu"
", ru_ixrss=%llu"
", ru_idrss=%llu"
", ru_isrss=%llu"
", ru_minflt=%llu"
", ru_majflt=%llu"
", ru_nswap=%llu"
", ru_inblock=%llu"
", ru_oublock=%llu"
", ru_msgsnd=%llu"
", ru_msgrcv=%llu"
", ru_nsignals=%llu"
", ru_nvcsw=%llu"
", ru_nivcsw=%llu}"
#else
", ...}"
#endif
, widen_to_ull(ru->ru_utime.tv_sec)
, widen_to_ull(ru->ru_utime.tv_usec)
, widen_to_ull(ru->ru_stime.tv_sec)
, widen_to_ull(ru->ru_stime.tv_usec)
#ifdef VERBOSE_RUSAGE
, widen_to_ull(ru->ru_maxrss)
, widen_to_ull(ru->ru_ixrss)
, widen_to_ull(ru->ru_idrss)
, widen_to_ull(ru->ru_isrss)
, widen_to_ull(ru->ru_minflt)
, widen_to_ull(ru->ru_majflt)
, widen_to_ull(ru->ru_nswap)
, widen_to_ull(ru->ru_inblock)
, widen_to_ull(ru->ru_oublock)
, widen_to_ull(ru->ru_msgsnd)
, widen_to_ull(ru->ru_msgrcv)
, widen_to_ull(ru->ru_nsignals)
, widen_to_ull(ru->ru_nvcsw)
, widen_to_ull(ru->ru_nivcsw)
#endif
);
return buf;
}
#define CASE(x) case x: return #x
static const char *
si_code_2_name(const int code)
{
switch (code) {
#ifdef CLD_EXITED
CASE(CLD_EXITED);
#endif
#ifdef CLD_KILLED
CASE(CLD_KILLED);
#endif
#ifdef CLD_DUMPED
CASE(CLD_DUMPED);
#endif
#ifdef CLD_TRAPPED
CASE(CLD_TRAPPED);
#endif
#ifdef CLD_STOPPED
CASE(CLD_STOPPED);
#endif
#ifdef CLD_CONTINUED
CASE(CLD_CONTINUED);
#endif
default: perror_msg_and_fail("unknown si_code %d", code);
}
}
static const char *
sprint_siginfo(const siginfo_t *const si, const char *const status_text)
{
static char buf[1024];
snprintf(buf, sizeof(buf),
"{si_signo=SIGCHLD"
", si_code=%s"
", si_pid=%u"
", si_uid=%u"
", si_status=%s"
", si_utime=%llu"
", si_stime=%llu}",
si_code_2_name(si->si_code),
si->si_pid,
si->si_uid,
status_text,
widen_to_ull(si->si_utime),
widen_to_ull(si->si_stime));
return buf;
}
static unsigned long
poison(unsigned int v)
{
return (unsigned long) 0xfacefeed00000000 | v;
}
static long
do_waitid(const unsigned int idtype,
const unsigned int id,
const siginfo_t const *infop,
const unsigned int options,
const struct rusage *const rusage)
{
sigset_t mask = {};
sigaddset(&mask, SIGCHLD);
assert(sigprocmask(SIG_BLOCK, &mask, NULL) == 0);
long rc = syscall(__NR_waitid, poison(idtype), poison(id),
infop, poison(options), rusage);
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);
if (do_waitid(P_PID, pid, 0, WNOHANG|WEXITED, 0))
perror_msg_and_fail("waitid #1");
tprintf("waitid(P_PID, %d, NULL, WNOHANG|WEXITED, NULL) = 0\n", pid);
siginfo_t *const sinfo = tail_alloc(sizeof(*sinfo));
memset(sinfo, 0, sizeof(*sinfo));
struct rusage *const rusage = tail_alloc(sizeof(*rusage));
if (do_waitid(P_PID, pid, sinfo, WNOHANG|WEXITED|WSTOPPED, rusage))
perror_msg_and_fail("waitid #2");
tprintf("waitid(P_PID, %d, {}, WNOHANG|WEXITED|WSTOPPED, %s) = 0\n",
pid, sprint_rusage(rusage));
assert(write(1, "", 1) == 1);
(void) close(1);
if (do_waitid(P_PID, pid, sinfo, WEXITED, rusage))
perror_msg_and_fail("waitid #3");
tprintf("waitid(P_PID, %d, %s, WEXITED, %s) = 0\n",
pid, sprint_siginfo(sinfo, "42"), sprint_rusage(rusage));
pid = fork();
if (pid < 0)
perror_msg_and_fail("fork");
if (!pid) {
(void) raise(SIGUSR1);
return 1;
}
if (do_waitid(P_PID, pid, sinfo, WEXITED, rusage))
perror_msg_and_fail("waitid #4");
tprintf("waitid(P_PID, %d, %s, WEXITED, %s) = 0\n",
pid, sprint_siginfo(sinfo, "SIGUSR1"), sprint_rusage(rusage));
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);
if (do_waitid(P_PID, pid, sinfo, WSTOPPED, rusage))
perror_msg_and_fail("waitid #5");
tprintf("waitid(P_PID, %d, %s, WSTOPPED, %s) = 0\n",
pid, sprint_siginfo(sinfo, "SIGSTOP"), sprint_rusage(rusage));
if (kill(pid, SIGCONT))
perror_msg_and_fail("kill(SIGCONT)");
#if defined WCONTINUED
if (do_waitid(P_PID, pid, sinfo, WCONTINUED, rusage))
perror_msg_and_fail("waitid #6");
tprintf("waitid(P_PID, %d, %s, WCONTINUED, %s) = 0\n",
pid, sprint_siginfo(sinfo, "SIGCONT"), sprint_rusage(rusage));
#endif /* WCONTINUED */
assert(write(1, "", 1) == 1);
(void) close(1);
if (do_waitid(P_PID, pid, sinfo, WEXITED, rusage))
perror_msg_and_fail("waitid #7");
tprintf("waitid(P_PID, %d, %s, WEXITED, %s) = 0\n",
pid, sprint_siginfo(sinfo, "0"), sprint_rusage(rusage));
long rc = do_waitid(P_ALL, -1, sinfo, WEXITED|WSTOPPED, rusage);
tprintf("waitid(P_ALL, -1, %p, WEXITED|WSTOPPED, %p)"
" = %ld %s (%m)\n", sinfo, rusage, rc, errno2name());
tprintf("%s\n", "+++ exited with 0 +++");
return 0;
}
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