1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 /* Copyright (c) 1988 AT&T */ 30 /* All Rights Reserved */ 31 32 33 /* 34 * execl(name, arg0, arg1, ..., argn, 0) 35 * environment automatically passed. 36 */ 37 38 #pragma weak execl = _execl 39 40 #include "synonyms.h" 41 #include <alloca.h> 42 #include <malloc.h> 43 #include <stdarg.h> 44 #include <sys/types.h> 45 #include <unistd.h> 46 47 /*VARARGS1*/ 48 int 49 execl(const char *name, const char *arg0, ...) 50 { 51 char **argp; 52 va_list args; 53 char **argvec; 54 extern char **environ; 55 int err; 56 int nargs = 0; 57 char *nextarg; 58 59 /* 60 * count the number of arguments in the variable argument list 61 * and allocate an argument vector for them on the stack, 62 * adding an extra element for a terminating null pointer 63 */ 64 65 va_start(args, arg0); 66 while (va_arg(args, char *) != (char *)0) { 67 nargs++; 68 } 69 va_end(args); 70 71 /* 72 * load the arguments in the variable argument list 73 * into the argument vector and add the terminating null pointer 74 */ 75 76 va_start(args, arg0); 77 78 /* workaround for bugid 1242839 */ 79 argvec = (char **)alloca((size_t)((nargs + 2) * sizeof (char *))); 80 argp = argvec; 81 *argp++ = (char *)arg0; 82 while ((nextarg = va_arg(args, char *)) != (char *)0) { 83 *argp++ = nextarg; 84 } 85 va_end(args); 86 *argp = (char *)0; 87 88 /* 89 * call execve() 90 */ 91 92 err = execve(name, argvec, environ); 93 return (err); 94 } 95