94 lines
3.0 KiB
C
94 lines
3.0 KiB
C
/* $NetBSD: execl.c,v 1.9 2003/01/18 11:23:53 thorpej Exp $ */
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/*-
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* Copyright (c) 1991, 1993
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* The Regents of the University of California. All rights reserved.
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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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* 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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#if defined(LIBC_SCCS) && !defined(lint)
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#if 0
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static char sccsid[] = "@(#)exec.c 8.1 (Berkeley) 6/4/93";
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#else
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__RCSID("$NetBSD: execl.c,v 1.9 2003/01/18 11:23:53 thorpej Exp $");
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#endif
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#endif /* LIBC_SCCS and not lint */
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#include "namespace.h"
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#include <stdarg.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include "reentrant.h"
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#ifdef __weak_alias
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__weak_alias(execl,_execl)
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#endif
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extern char **environ;
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#ifdef _REENTRANT
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extern rwlock_t __environ_lock;
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#endif
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int
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execl(const char *name, const char *arg, ...)
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{
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int r;
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#if defined(__i386__) || defined(__m68k__) || defined(__ns32k__)
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rwlock_rdlock(&__environ_lock);
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r = execve(name, (char **) &arg, environ);
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rwlock_unlock(&__environ_lock);
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return (r);
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#else
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va_list ap;
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char **argv;
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int i;
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va_start(ap, arg);
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for (i = 2; va_arg(ap, char *) != NULL; i++)
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;
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va_end(ap);
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argv = alloca (i * sizeof (char *));
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va_start(ap, arg);
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argv[0] = (char *) arg;
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for (i = 1; (argv[i] = (char *) va_arg(ap, char *)) != NULL; i++)
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;
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va_end(ap);
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rwlock_rdlock(&__environ_lock);
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r = execve(name, argv, environ);
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rwlock_unlock(&__environ_lock);
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return (r);
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#endif
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}
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