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/*
* Copyright 2013 Google Inc.
*
* 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 will 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 to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*/
/*
* Author: ncardwell@google.com (Neal Cardwell)
*
* A module to execute a system(3) shell command and check the result.
*/
#include "system.h"
#include <errno.h>
#include <signal.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/wait.h>
int safe_system(const char *command, char **error)
{
int status = system(command);
if (status == -1) {
asprintf(error, "%s", strerror(errno));
return STATUS_ERR;
}
if (WIFSIGNALED(status) &&
(WTERMSIG(status) == SIGINT || WTERMSIG(status) == SIGQUIT)) {
asprintf(error, "got signal %d (%s)",
WTERMSIG(status), strsignal(WTERMSIG(status)));
return STATUS_ERR;
}
if (WEXITSTATUS(status) != 0) {
asprintf(error, "non-zero status %d", WEXITSTATUS(status));
return STATUS_ERR;
}
return STATUS_OK;
}
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