1 /* $NetBSD: posix_spawnp.c,v 1.3 2018/01/04 20:57:29 kamil 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 1.3 2018/01/04 20:57:29 kamil Exp $"); 35 #endif /* LIBC_SCCS and not lint */ 36 37 #include "namespace.h" 38 39 #include <stdio.h> 40 #include <string.h> 41 #include <stdlib.h> 42 #include <errno.h> 43 #include <unistd.h> 44 #include <spawn.h> 45 46 47 int posix_spawnp(pid_t * __restrict pid, const char * __restrict file, 48 const posix_spawn_file_actions_t *fa, 49 const posix_spawnattr_t * __restrict sa, 50 char * const *__restrict cav, char * const *__restrict env) 51 { 52 char fpath[FILENAME_MAX], *last, *p; 53 char *path; 54 55 /* 56 * If there is a / in the filename, or no PATH environment variable 57 * set, fall straight through to posix_spawn(). 58 */ 59 if (strchr(file, '/') != NULL || (path = getenv("PATH")) == NULL) 60 return posix_spawn(pid, file, fa, sa, cav, env); 61 62 path = strdup(path); 63 if (path == NULL) 64 return ENOMEM; 65 66 /* 67 * Find an executable image with the given name in the PATH 68 */ 69 for (p = strtok_r(path, ":", &last); p; 70 p = strtok_r(NULL, ":", &last)) { 71 snprintf(fpath, sizeof fpath, "%s/%s", p, file); 72 fpath[FILENAME_MAX-1] = 0; 73 if (access(fpath, X_OK) == 0) 74 break; 75 } 76 free(path); 77 78 /* 79 * Use posix_spawn() with the found binary 80 */ 81 return posix_spawn(pid, fpath, fa, sa, cav, env); 82 } 83