171 lines
3.7 KiB
C
171 lines
3.7 KiB
C
/* $NetBSD: fexec.c,v 1.12 2009/08/02 17:56:45 joerg Exp $ */
|
|
|
|
/*-
|
|
* Copyright (c) 2003 The NetBSD Foundation, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to The NetBSD Foundation
|
|
* by Matthias Scheler.
|
|
*
|
|
* 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.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
|
|
*/
|
|
|
|
|
|
#if HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
#ifndef __minix
|
|
#include <nbcompat.h>
|
|
#endif
|
|
#if HAVE_SYS_CDEFS_H
|
|
#include <sys/cdefs.h>
|
|
#endif
|
|
#if HAVE_SYS_WAIT_H
|
|
#include <sys/wait.h>
|
|
#endif
|
|
|
|
#if HAVE_ERR_H
|
|
#include <err.h>
|
|
#endif
|
|
#if HAVE_ERRNO_H
|
|
#include <errno.h>
|
|
#endif
|
|
#if HAVE_STDARG_H
|
|
#include <stdarg.h>
|
|
#endif
|
|
#if HAVE_STDLIB_H
|
|
#include <stdlib.h>
|
|
#endif
|
|
#if HAVE_UNISTD_H
|
|
#include <unistd.h>
|
|
#endif
|
|
|
|
#include "lib.h"
|
|
|
|
#ifndef __minix
|
|
__RCSID("$NetBSD: fexec.c,v 1.12 2009/08/02 17:56:45 joerg Exp $");
|
|
#endif
|
|
|
|
static int vfcexec(const char *, int, const char *, va_list);
|
|
|
|
/*
|
|
* fork, then change current working directory to path and
|
|
* execute the command and arguments in the argv array.
|
|
* wait for the command to finish, then return the exit status.
|
|
*/
|
|
int
|
|
pfcexec(const char *path, const char *file, const char **argv)
|
|
{
|
|
pid_t child;
|
|
int status;
|
|
|
|
child = vfork();
|
|
switch (child) {
|
|
case 0:
|
|
if ((path != NULL) && (chdir(path) < 0))
|
|
_exit(127);
|
|
|
|
(void)execvp(file, __UNCONST(argv));
|
|
_exit(127);
|
|
/* NOTREACHED */
|
|
case -1:
|
|
return -1;
|
|
}
|
|
|
|
while (waitpid(child, &status, 0) < 0) {
|
|
if (errno != EINTR)
|
|
return -1;
|
|
}
|
|
|
|
if (!WIFEXITED(status))
|
|
return -1;
|
|
|
|
return WEXITSTATUS(status);
|
|
}
|
|
|
|
static int
|
|
vfcexec(const char *path, int skipempty, const char *arg, va_list ap)
|
|
{
|
|
const char **argv;
|
|
size_t argv_size, argc;
|
|
int retval;
|
|
|
|
argv_size = 16;
|
|
argv = xcalloc(argv_size, sizeof(*argv));
|
|
|
|
argv[0] = arg;
|
|
argc = 1;
|
|
|
|
do {
|
|
if (argc == argv_size) {
|
|
argv_size *= 2;
|
|
argv = xrealloc(argv, argv_size * sizeof(*argv));
|
|
}
|
|
arg = va_arg(ap, const char *);
|
|
if (skipempty && arg && strlen(arg) == 0)
|
|
continue;
|
|
argv[argc++] = arg;
|
|
} while (arg != NULL);
|
|
|
|
retval = pfcexec(path, argv[0], argv);
|
|
free(argv);
|
|
return retval;
|
|
}
|
|
|
|
int
|
|
fexec(const char *arg, ...)
|
|
{
|
|
va_list ap;
|
|
int result;
|
|
|
|
va_start(ap, arg);
|
|
result = vfcexec(NULL, 0, arg, ap);
|
|
va_end(ap);
|
|
|
|
return result;
|
|
}
|
|
|
|
int
|
|
fexec_skipempty(const char *arg, ...)
|
|
{
|
|
va_list ap;
|
|
int result;
|
|
|
|
va_start(ap, arg);
|
|
result = vfcexec(NULL, 1, arg, ap);
|
|
va_end(ap);
|
|
|
|
return result;
|
|
}
|
|
|
|
int
|
|
fcexec(const char *path, const char *arg, ...)
|
|
{
|
|
va_list ap;
|
|
int result;
|
|
|
|
va_start(ap, arg);
|
|
result = vfcexec(path, 0, arg, ap);
|
|
va_end(ap);
|
|
|
|
return result;
|
|
}
|