1 /* $NetBSD: execlp.c,v 1.13 2014/09/26 19:28:03 christos Exp $ */
2
3 /*-
4 * Copyright (c) 1991, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32 #include <sys/cdefs.h>
33 #if defined(LIBC_SCCS) && !defined(lint)
34 #if 0
35 static char sccsid[] = "@(#)exec.c 8.1 (Berkeley) 6/4/93";
36 #else
37 __RCSID("$NetBSD: execlp.c,v 1.13 2014/09/26 19:28:03 christos Exp $");
38 #endif
39 #endif /* LIBC_SCCS and not lint */
40
41 #include "namespace.h"
42 #include <stdarg.h>
43 #include <stdlib.h>
44 #include <unistd.h>
45 #include <errno.h>
46
47 #ifdef __weak_alias
__weak_alias(execlp,_execlp)48 __weak_alias(execlp,_execlp)
49 __weak_alias(execlpe,_execlpe)
50 #endif
51
52 int
53 execlp(const char *name, const char *arg, ...)
54 {
55 va_list ap;
56 char **argv;
57 size_t i;
58
59 va_start(ap, arg);
60 for (i = 2; va_arg(ap, char *) != NULL; i++)
61 continue;
62 va_end(ap);
63
64 argv = alloca(i * sizeof (char *));
65
66 va_start(ap, arg);
67 argv[0] = __UNCONST(arg);
68 for (i = 1; (argv[i] = va_arg(ap, char *)) != NULL; i++)
69 continue;
70 va_end(ap);
71
72 return execvp(name, argv);
73 }
74
75 int
execlpe(const char * name,const char * arg,...)76 execlpe(const char *name, const char *arg, ...)
77 {
78 va_list ap;
79 char **argv, **envp;
80 size_t i;
81
82 va_start(ap, arg);
83 for (i = 2; va_arg(ap, char *) != NULL; i++)
84 continue;
85 va_end(ap);
86
87 argv = alloca(i * sizeof (char *));
88
89 va_start(ap, arg);
90 argv[0] = __UNCONST(arg);
91 for (i = 1; (argv[i] = va_arg(ap, char *)) != NULL; i++)
92 continue;
93 envp = va_arg(ap, char **);
94 va_end(ap);
95
96 return execvpe(name, argv, envp);
97 }
98