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/*
* Copyright (c) 2013 Oracle and/or its affiliates. All Rights Reserved.
* Copyright (c) 2020 Petr Vorel <pvorel@suse.cz>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it would be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* Author: Alexey Kodanev <alexey.kodanev@oracle.com>
*/
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <fcntl.h>
#include <unistd.h>
#include <signal.h>
#include "test.h"
#include "tst_cmd.h"
#define OPEN_MODE (S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH)
#define OPEN_FLAGS (O_WRONLY | O_APPEND | O_CREAT)
int tst_cmd_fds_(void (cleanup_fn)(void),
const char *const argv[],
int stdout_fd,
int stderr_fd,
enum tst_cmd_flags flags)
{
int rc;
if (argv == NULL || argv[0] == NULL) {
tst_brkm(TBROK, cleanup_fn,
"argument list is empty at %s:%d", __FILE__, __LINE__);
return -1;
}
/*
* The tst_sig() install poisoned signal handlers for all signals the
* test is not expected to get.
*
* So we temporarily disable the handler for sigchild we get after our
* child exits so that we don't have to disable it in each test that
* uses this interface.
*/
void *old_handler = signal(SIGCHLD, SIG_DFL);
char path[PATH_MAX];
if (tst_get_path(argv[0], path, sizeof(path))) {
if (flags & TST_CMD_TCONF_ON_MISSING)
tst_brkm(TCONF, cleanup_fn, "Couldn't find '%s' in $PATH at %s:%d", argv[0],
__FILE__, __LINE__);
else
return 255;
}
pid_t pid = vfork();
if (pid == -1) {
tst_brkm(TBROK | TERRNO, cleanup_fn, "vfork failed at %s:%d",
__FILE__, __LINE__);
return -1;
}
if (!pid) {
/* redirecting stdout and stderr if needed */
if (stdout_fd != -1) {
close(STDOUT_FILENO);
dup2(stdout_fd, STDOUT_FILENO);
}
if (stderr_fd != -1) {
close(STDERR_FILENO);
dup2(stderr_fd, STDERR_FILENO);
}
execvp(argv[0], (char *const *)argv);
_exit(254);
}
int ret = -1;
if (waitpid(pid, &ret, 0) != pid) {
tst_brkm(TBROK | TERRNO, cleanup_fn, "waitpid failed at %s:%d",
__FILE__, __LINE__);
return -1;
}
signal(SIGCHLD, old_handler);
if (!WIFEXITED(ret)) {
tst_brkm(TBROK, cleanup_fn, "failed to exec cmd '%s' at %s:%d",
argv[0], __FILE__, __LINE__);
return -1;
}
rc = WEXITSTATUS(ret);
if (!(flags & TST_CMD_PASS_RETVAL) && rc) {
tst_brkm(TBROK, cleanup_fn,
"'%s' exited with a non-zero code %d at %s:%d",
argv[0], rc, __FILE__, __LINE__);
return -1;
}
return rc;
}
int tst_cmd_(void (cleanup_fn)(void),
const char *const argv[],
const char *stdout_path,
const char *stderr_path,
enum tst_cmd_flags flags)
{
int stdout_fd = -1;
int stderr_fd = -1;
int rc;
if (stdout_path != NULL) {
stdout_fd = open(stdout_path,
OPEN_FLAGS, OPEN_MODE);
if (stdout_fd == -1)
tst_resm(TWARN | TERRNO,
"open() on %s failed at %s:%d",
stdout_path, __FILE__, __LINE__);
}
if (stderr_path != NULL) {
stderr_fd = open(stderr_path,
OPEN_FLAGS, OPEN_MODE);
if (stderr_fd == -1)
tst_resm(TWARN | TERRNO,
"open() on %s failed at %s:%d",
stderr_path, __FILE__, __LINE__);
}
rc = tst_cmd_fds(cleanup_fn, argv, stdout_fd, stderr_fd, flags);
if ((stdout_fd != -1) && (close(stdout_fd) == -1))
tst_resm(TWARN | TERRNO,
"close() on %s failed at %s:%d",
stdout_path, __FILE__, __LINE__);
if ((stderr_fd != -1) && (close(stderr_fd) == -1))
tst_resm(TWARN | TERRNO,
"close() on %s failed at %s:%d",
stderr_path, __FILE__, __LINE__);
return rc;
}
int tst_system(const char *command)
{
int ret = 0;
/*
*Temporarily disable SIGCHLD of user defined handler, so the
*system(3) function will not cause unexpected SIGCHLD signal
*callback function for test cases.
*/
void *old_handler = signal(SIGCHLD, SIG_DFL);
ret = system(command);
signal(SIGCHLD, old_handler);
return ret;
}
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