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
execle(const char * file,const char * arg0,...)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