1 /* $NetBSD: execl.c,v 1.17 2011/06/30 19:46:07 joerg 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. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 #if defined(LIBC_SCCS) && !defined(lint) 34 #if 0 35 static char sccsid[] = "@(#)exec.c 8.1 (Berkeley) 6/4/93"; 36 #else 37 __RCSID("$NetBSD: execl.c,v 1.17 2011/06/30 19:46:07 joerg Exp $"); 38 #endif 39 #endif /* LIBC_SCCS and not lint */ 40 41 #include "namespace.h" 42 #include <errno.h> 43 #include <stdarg.h> 44 #include <stdlib.h> 45 #include <unistd.h> 46 #include "reentrant.h" 47 48 #ifdef __weak_alias 49 __weak_alias(execl,_execl) 50 #endif 51 52 53 extern char **environ; 54 55 int 56 execl(const char *name, const char *arg, ...) 57 { 58 int r; 59 va_list ap; 60 char **argv; 61 int i; 62 63 va_start(ap, arg); 64 for (i = 2; va_arg(ap, char *) != NULL; i++) 65 continue; 66 va_end(ap); 67 68 if ((argv = alloca(i * sizeof (char *))) == NULL) { 69 errno = ENOMEM; 70 return -1; 71 } 72 73 va_start(ap, arg); 74 argv[0] = __UNCONST(arg); 75 for (i = 1; (argv[i] = va_arg(ap, char *)) != NULL; i++) 76 continue; 77 va_end(ap); 78 79 r = execve(name, argv, environ); 80 return r; 81 } 82