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 (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* Copyright (c) 1988 AT&T */ 28 /* All Rights Reserved */ 29 30 #pragma ident "%Z%%M% %I% %E% SMI" 31 32 /* 33 * execl(name, arg0, arg1, ..., argn, 0) 34 * environment automatically passed. 35 */ 36 37 #pragma weak _execl = execl 38 39 #include "lint.h" 40 #include <alloca.h> 41 #include <malloc.h> 42 #include <stdarg.h> 43 #include <sys/types.h> 44 #include <unistd.h> 45 46 /*VARARGS1*/ 47 int 48 execl(const char *name, const char *arg0, ...) 49 { 50 char **argp; 51 va_list args; 52 char **argvec; 53 extern char **_environ; 54 int err; 55 int nargs = 0; 56 char *nextarg; 57 58 /* 59 * count the number of arguments in the variable argument list 60 * and allocate an argument vector for them on the stack, 61 * adding an extra element for a terminating null pointer 62 */ 63 64 va_start(args, arg0); 65 while (va_arg(args, char *) != (char *)0) { 66 nargs++; 67 } 68 va_end(args); 69 70 /* 71 * load the arguments in the variable argument list 72 * into the argument vector and add the terminating null pointer 73 */ 74 75 va_start(args, arg0); 76 77 /* workaround for bugid 1242839 */ 78 argvec = (char **)alloca((size_t)((nargs + 2) * sizeof (char *))); 79 argp = argvec; 80 *argp++ = (char *)arg0; 81 while ((nextarg = va_arg(args, char *)) != (char *)0) { 82 *argp++ = nextarg; 83 } 84 va_end(args); 85 *argp = (char *)0; 86 87 /* 88 * call execve() 89 */ 90 91 err = execve(name, argvec, _environ); 92 return (err); 93 } 94