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 * execle(file, arg1, arg2, ..., 0, envp) 34 */ 35 36 #pragma weak _execle = execle 37 38 #include "lint.h" 39 #include <sys/types.h> 40 #include <alloca.h> 41 #include <malloc.h> 42 #include <stdarg.h> 43 #include <unistd.h> 44 45 /*VARARGS1*/ 46 int 47 execle(const char *file, const char *arg0, ...) 48 { 49 char **argp; 50 va_list args; 51 char **argvec; 52 register char **environmentp; 53 int err; 54 int nargs = 0; 55 char *nextarg; 56 57 /* 58 * count the number of arguments in the variable argument list 59 * and allocate an argument vector for them on the stack, 60 * adding space at the end for a terminating null pointer 61 */ 62 63 va_start(args, arg0); 64 while (va_arg(args, char *) != (char *)0) { 65 nargs++; 66 } 67 68 /* 69 * save the environment pointer, which is at the end of the 70 * variable argument list 71 */ 72 73 environmentp = va_arg(args, char **); 74 va_end(args); 75 76 /* 77 * load the arguments in the variable argument list 78 * into the argument vector, and add the terminating null pointer 79 */ 80 81 va_start(args, arg0); 82 /* workaround for bugid 1242839 */ 83 argvec = (char **)alloca((size_t)((nargs + 2) * sizeof (char *))); 84 argp = argvec; 85 *argp++ = (char *)arg0; 86 while ((nextarg = va_arg(args, char *)) != (char *)0) { 87 *argp++ = nextarg; 88 } 89 va_end(args); 90 *argp = (char *)0; 91 92 /* 93 * call execve() 94 */ 95 96 err = execve(file, argvec, environmentp); 97 return (err); 98 } 99