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/* Copyright (C) 2002-2023 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 <fcntl.h>
#include <getopt.h>
#include <signal.h>
#include <stdlib.h>
#include <semaphore.h>
#include <sys/mman.h>
#include <support/check.h>
#include <support/support.h>
#include <support/temp_file.h>
#include <support/xstdio.h>
#include <support/xunistd.h>
#include <support/xthread.h>
static const char *command;
static const char *pidfile;
static const char *semfile;
static char *pidfilename;
static char *semfilename;
static sem_t *sem;
static void *
tf (void *arg)
{
char *cmd = xasprintf ("%s --direct --sem %s --pidfile %s",
command, semfilename, pidfilename);
if (system (cmd))
FAIL_EXIT1("system call unexpectedly returned");
/* This call should never return. */
return NULL;
}
static void
sl (void)
{
FILE *f = xfopen (pidfile, "w");
fprintf (f, "%lld\n", (long long) getpid ());
fflush (f);
if (sem_post (sem) != 0)
FAIL_EXIT1 ("sem_post: %m");
struct flock fl =
{
.l_type = F_WRLCK,
.l_start = 0,
.l_whence = SEEK_SET,
.l_len = 1
};
if (fcntl (fileno (f), F_SETLK, &fl) != 0)
FAIL_EXIT1 ("fcntl (F_SETFL): %m");
sigset_t ss;
sigfillset (&ss);
sigsuspend (&ss);
exit (0);
}
static void
do_prepare (int argc, char *argv[])
{
int semfd;
if (semfile == NULL)
semfd = create_temp_file ("tst-cancel7.", &semfilename);
else
semfd = open (semfile, O_RDWR);
TEST_VERIFY_EXIT (semfd != -1);
sem = xmmap (NULL, sizeof (sem_t), PROT_READ | PROT_WRITE, MAP_SHARED,
semfd);
TEST_VERIFY_EXIT (sem != SEM_FAILED);
if (semfile == NULL)
{
xftruncate (semfd, sizeof (sem_t));
TEST_VERIFY_EXIT (sem_init (sem, 1, 0) != -1);
}
if (command == NULL)
command = argv[0];
if (pidfile)
sl ();
int fd = create_temp_file ("tst-cancel7-pid-", &pidfilename);
if (fd == -1)
FAIL_EXIT1 ("create_temp_file failed: %m");
xwrite (fd, " ", 1);
xclose (fd);
}
static int
do_test (void)
{
pthread_t th = xpthread_create (NULL, tf, NULL);
/* Wait to cancel until after the pid is written. */
if (sem_wait (sem) != 0)
FAIL_EXIT1 ("sem_wait: %m");
xpthread_cancel (th);
void *r = xpthread_join (th);
FILE *f = xfopen (pidfilename, "r+");
long long ll;
if (fscanf (f, "%lld\n", &ll) != 1)
FAIL_EXIT1 ("fscanf: %m");
struct flock fl =
{
.l_type = F_WRLCK,
.l_start = 0,
.l_whence = SEEK_SET,
.l_len = 1
};
if (fcntl (fileno (f), F_GETLK, &fl) != 0)
FAIL_EXIT1 ("fcntl: %m");
if (fl.l_type != F_UNLCK)
{
printf ("child %lld still running\n", (long long) fl.l_pid);
if (fl.l_pid == ll)
kill (fl.l_pid, SIGKILL);
return 1;
}
xfclose (f);
return r != PTHREAD_CANCELED;
}
static void
do_cleanup (void)
{
FILE *f = fopen (pidfilename, "r+");
long long ll;
if (f != NULL && fscanf (f, "%lld\n", &ll) == 1)
{
struct flock fl =
{
.l_type = F_WRLCK,
.l_start = 0,
.l_whence = SEEK_SET,
.l_len = 1
};
if (fcntl (fileno (f), F_GETLK, &fl) == 0 && fl.l_type != F_UNLCK
&& fl.l_pid == ll)
kill (fl.l_pid, SIGKILL);
fclose (f);
}
}
#define OPT_COMMAND 10000
#define OPT_PIDFILE 10001
#define OPT_SEMFILE 10002
#define CMDLINE_OPTIONS \
{ "command", required_argument, NULL, OPT_COMMAND }, \
{ "pidfile", required_argument, NULL, OPT_PIDFILE }, \
{ "sem", required_argument, NULL, OPT_SEMFILE },
static void
cmdline_process (int c)
{
switch (c)
{
case OPT_COMMAND:
command = optarg;
break;
case OPT_PIDFILE:
pidfile = optarg;
break;
case OPT_SEMFILE:
semfile = optarg;
break;
}
}
#define CMDLINE_PROCESS cmdline_process
#define CLEANUP_HANDLER do_cleanup
#define PREPARE do_prepare
#include <support/test-driver.c>
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