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/*
* Copyright (c) 2011 , Jonathan Nieder
* 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 copyright holders or contributors may not be used to
* endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* ``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 COPYRIGHT
* HOLDERS OR CONTRIBUTORS 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 <config.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include "exitcodes.h"
#include "prototypes.h"
int run_command (const char *cmd, const char *argv[],
/*@null@*/const char *envp[], /*@out@*/int *status)
{
pid_t pid, wpid;
if (NULL == envp) {
envp = (const char **)environ;
}
(void) fflush (stdout);
(void) fflush (stderr);
pid = fork ();
if (0 == pid) {
(void) execve (cmd, (char * const *) argv,
(char * const *) envp);
if (ENOENT == errno) {
exit (E_CMD_NOTFOUND);
}
fprintf (stderr, "%s: cannot execute %s: %s\n",
Prog, cmd, strerror (errno));
exit (E_CMD_NOEXEC);
} else if ((pid_t)-1 == pid) {
fprintf (stderr, "%s: cannot execute %s: %s\n",
Prog, cmd, strerror (errno));
return -1;
}
do {
wpid = waitpid (pid, status, 0);
} while ( ((pid_t)-1 == wpid && errno == EINTR)
|| (wpid != pid));
if ((pid_t)-1 == wpid) {
fprintf (stderr, "%s: waitpid (status: %d): %s\n",
Prog, *status, strerror (errno));
return -1;
}
return 0;
}
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