77 lines
2.3 KiB
C
77 lines
2.3 KiB
C
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/*
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* Copyright (c) 2011, Jonathan Nieder
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
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* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FREEBSD
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* PROJECT OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <config.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <unistd.h>
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#include <errno.h>
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#include "exitcodes.h"
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#include "spawn.h"
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extern char **environ;
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int run_command (const char *cmd, const char *argv[], const char *envp[],
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int *status)
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{
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pid_t pid, wpid;
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if (!envp)
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envp = (const char **)environ;
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pid = fork ();
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if (pid == 0) {
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execve (cmd, (char * const *) argv, (char * const *) envp);
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if (errno == ENOENT)
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exit (E_CMD_NOTFOUND);
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perror(cmd);
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exit (E_CMD_NOEXEC);
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} else if ((pid_t)-1 == pid) {
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int saved_errno = errno;
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perror ("fork");
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errno = saved_errno;
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return -1;
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}
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do {
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wpid = waitpid (pid, status, 0);
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} while ((pid_t)-1 == wpid && errno == EINTR);
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if ((pid_t)-1 == wpid) {
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int saved_errno = errno;
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perror ("waitpid");
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return -1;
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} else if (wpid != pid) {
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(void) fprintf (stderr, "waitpid returned %ld != %ld\n",
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(long int) wpid, (long int) pid);
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errno = ECHILD;
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return -1;
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}
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return 0;
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}
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