1 /* $NetBSD: posix_spawnp.c,v 1.2 2012/02/22 17:51:01 martin Exp $ */
2
3 /*-
4 * Copyright (c) 2011 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Martin Husemann <martin@NetBSD.org>.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 #include <sys/cdefs.h>
33 #if defined(LIBC_SCCS) && !defined(lint)
34 __RCSID("$NetBSD: posix_spawnp.c,v 1.2 2012/02/22 17:51:01 martin Exp $");
35 #endif /* LIBC_SCCS and not lint */
36
37 #include <stdio.h>
38 #include <string.h>
39 #include <stdlib.h>
40 #include <errno.h>
41 #include <unistd.h>
42 #include <spawn.h>
43
44
posix_spawnp(pid_t * __restrict pid,const char * __restrict file,const posix_spawn_file_actions_t * fa,const posix_spawnattr_t * __restrict sa,char * const * __restrict cav,char * const * __restrict env)45 int posix_spawnp(pid_t * __restrict pid, const char * __restrict file,
46 const posix_spawn_file_actions_t *fa,
47 const posix_spawnattr_t * __restrict sa,
48 char * const *__restrict cav, char * const *__restrict env)
49 {
50 char fpath[FILENAME_MAX], *last, *p;
51 char *path;
52
53 /*
54 * If there is a / in the filename, or no PATH environment variable
55 * set, fall straight through to posix_spawn().
56 */
57 if (strchr(file, '/') != NULL || (path = getenv("PATH")) == NULL)
58 return posix_spawn(pid, file, fa, sa, cav, env);
59
60 path = strdup(path);
61 if (path == NULL)
62 return ENOMEM;
63
64 /*
65 * Find an executable image with the given name in the PATH
66 */
67 for (p = strtok_r(path, ":", &last); p;
68 p = strtok_r(NULL, ":", &last)) {
69 snprintf(fpath, sizeof fpath, "%s/%s", p, file);
70 fpath[FILENAME_MAX-1] = 0;
71 if (access(fpath, X_OK) == 0)
72 break;
73 }
74 free(path);
75
76 /*
77 * Use posix_spawn() with the found binary
78 */
79 return posix_spawn(pid, fpath, fa, sa, cav, env);
80 }
81
82