1 /* $NetBSD: execl.c,v 1.8 2002/05/26 14:03:19 wiz Exp $ */ 2 3 /*- 4 * Copyright (c) 1991, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 #if defined(LIBC_SCCS) && !defined(lint) 38 #if 0 39 static char sccsid[] = "@(#)exec.c 8.1 (Berkeley) 6/4/93"; 40 #else 41 __RCSID("$NetBSD: execl.c,v 1.8 2002/05/26 14:03:19 wiz Exp $"); 42 #endif 43 #endif /* LIBC_SCCS and not lint */ 44 45 #include "namespace.h" 46 #include <stdarg.h> 47 #include <stdlib.h> 48 #include <unistd.h> 49 #include "reentrant.h" 50 51 #ifdef __weak_alias 52 __weak_alias(execl,_execl) 53 #endif 54 55 56 extern char **environ; 57 #ifdef _REENT 58 extern rwlock_t __environ_lock; 59 #endif 60 61 int 62 execl(const char *name, const char *arg, ...) 63 { 64 int r; 65 #if defined(__i386__) || defined(__m68k__) || defined(__ns32k__) 66 rwlock_rdlock(&__environ_lock); 67 r = execve(name, (char **) &arg, environ); 68 rwlock_unlock(&__environ_lock); 69 return (r); 70 #else 71 va_list ap; 72 char **argv; 73 int i; 74 75 va_start(ap, arg); 76 for (i = 2; va_arg(ap, char *) != NULL; i++) 77 ; 78 va_end(ap); 79 80 argv = alloca (i * sizeof (char *)); 81 82 va_start(ap, arg); 83 argv[0] = (char *) arg; 84 for (i = 1; (argv[i] = (char *) va_arg(ap, char *)) != NULL; i++) 85 ; 86 va_end(ap); 87 88 rwlock_rdlock(&__environ_lock); 89 r = execve(name, argv, environ); 90 rwlock_unlock(&__environ_lock); 91 return (r); 92 #endif 93 } 94