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