82 lines
2.8 KiB
C
82 lines
2.8 KiB
C
/* $NetBSD: posix_spawnp.c,v 1.2 2012/02/22 17:51:01 martin Exp $ */
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/*-
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* Copyright (c) 2011 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Martin Husemann <martin@NetBSD.org>.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#if defined(LIBC_SCCS) && !defined(lint)
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__RCSID("$NetBSD: posix_spawnp.c,v 1.2 2012/02/22 17:51:01 martin Exp $");
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#endif /* LIBC_SCCS and not lint */
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <unistd.h>
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#include <spawn.h>
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int posix_spawnp(pid_t * __restrict pid, const char * __restrict file,
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const posix_spawn_file_actions_t *fa,
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const posix_spawnattr_t * __restrict sa,
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char * const *__restrict cav, char * const *__restrict env)
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{
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char fpath[FILENAME_MAX], *last, *p;
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char *path;
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/*
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* If there is a / in the filename, or no PATH environment variable
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* set, fall straight through to posix_spawn().
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*/
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if (strchr(file, '/') != NULL || (path = getenv("PATH")) == NULL)
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return posix_spawn(pid, file, fa, sa, cav, env);
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path = strdup(path);
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if (path == NULL)
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return ENOMEM;
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/*
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* Find an executable image with the given name in the PATH
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*/
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for (p = strtok_r(path, ":", &last); p;
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p = strtok_r(NULL, ":", &last)) {
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snprintf(fpath, sizeof fpath, "%s/%s", p, file);
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fpath[FILENAME_MAX-1] = 0;
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if (access(fpath, X_OK) == 0)
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break;
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}
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free(path);
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/*
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* Use posix_spawn() with the found binary
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*/
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return posix_spawn(pid, fpath, fa, sa, cav, env);
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}
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