NetBSD/lib/libc/gen/execl.c

94 lines
3.0 KiB
C

/* $NetBSD: execl.c,v 1.8 2002/05/26 14:03:19 wiz Exp $ */
/*-
* Copyright (c) 1991, 1993
* The Regents of the University of California. 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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 <sys/cdefs.h>
#if defined(LIBC_SCCS) && !defined(lint)
#if 0
static char sccsid[] = "@(#)exec.c 8.1 (Berkeley) 6/4/93";
#else
__RCSID("$NetBSD: execl.c,v 1.8 2002/05/26 14:03:19 wiz Exp $");
#endif
#endif /* LIBC_SCCS and not lint */
#include "namespace.h"
#include <stdarg.h>
#include <stdlib.h>
#include <unistd.h>
#include "reentrant.h"
#ifdef __weak_alias
__weak_alias(execl,_execl)
#endif
extern char **environ;
#ifdef _REENT
extern rwlock_t __environ_lock;
#endif
int
execl(const char *name, const char *arg, ...)
{
int r;
#if defined(__i386__) || defined(__m68k__) || defined(__ns32k__)
rwlock_rdlock(&__environ_lock);
r = execve(name, (char **) &arg, environ);
rwlock_unlock(&__environ_lock);
return (r);
#else
va_list ap;
char **argv;
int i;
va_start(ap, arg);
for (i = 2; va_arg(ap, char *) != NULL; i++)
;
va_end(ap);
argv = alloca (i * sizeof (char *));
va_start(ap, arg);
argv[0] = (char *) arg;
for (i = 1; (argv[i] = (char *) va_arg(ap, char *)) != NULL; i++)
;
va_end(ap);
rwlock_rdlock(&__environ_lock);
r = execve(name, argv, environ);
rwlock_unlock(&__environ_lock);
return (r);
#endif
}