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 /* 31 * execle(file, arg1, arg2, ..., 0, envp) 32 */ 33 34 #pragma weak _execle = execle 35 36 #include "lint.h" 37 #include <sys/types.h> 38 #include <alloca.h> 39 #include <malloc.h> 40 #include <stdarg.h> 41 #include <unistd.h> 42 43 /*VARARGS1*/ 44 int 45 execle(const char *file, const char *arg0, ...) 46 { 47 char **argp; 48 va_list args; 49 char **argvec; 50 register char **environmentp; 51 int err; 52 int nargs = 0; 53 char *nextarg; 54 55 /* 56 * count the number of arguments in the variable argument list 57 * and allocate an argument vector for them on the stack, 58 * adding space at the end for a terminating null pointer 59 */ 60 61 va_start(args, arg0); 62 while (va_arg(args, char *) != (char *)0) { 63 nargs++; 64 } 65 66 /* 67 * save the environment pointer, which is at the end of the 68 * variable argument list 69 */ 70 71 environmentp = va_arg(args, char **); 72 va_end(args); 73 74 /* 75 * load the arguments in the variable argument list 76 * into the argument vector, and add the terminating null pointer 77 */ 78 79 va_start(args, arg0); 80 /* workaround for bugid 1242839 */ 81 argvec = (char **)alloca((size_t)((nargs + 2) * sizeof (char *))); 82 argp = argvec; 83 *argp++ = (char *)arg0; 84 while ((nextarg = va_arg(args, char *)) != (char *)0) { 85 *argp++ = nextarg; 86 } 87 va_end(args); 88 *argp = (char *)0; 89 90 /* 91 * call execve() 92 */ 93 94 err = execve(file, argvec, environmentp); 95 return (err); 96 } 97