/*
 * ***** BEGIN LICENSE BLOCK *****
 * Version: MIT
 *
 * Portions created by VMware are Copyright (c) 2007-2012 VMware, Inc.
 * All Rights Reserved.
 *
 * Portions created by Tony Garnock-Jones are Copyright (c) 2009-2010
 * VMware, Inc. and Tony Garnock-Jones. All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person
 * obtaining a copy of this software and associated documentation
 * files (the "Software"), to deal in the Software without
 * restriction, including without limitation the rights to use, copy,
 * modify, merge, publish, distribute, sublicense, and/or sell copies
 * of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 * ***** END LICENSE BLOCK *****
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <unistd.h>
#include <errno.h>
#include <spawn.h>
#include <sys/wait.h>

#include "common.h"
#include "process.h"

extern char **environ;

void pipeline(const char *const *argv, struct pipeline *pl)
{
	posix_spawn_file_actions_t file_acts;

	int pipefds[2];
	if (pipe(pipefds))
		die_errno(errno, "pipe");

	die_errno(posix_spawn_file_actions_init(&file_acts),
		  "posix_spawn_file_actions_init");
	die_errno(posix_spawn_file_actions_adddup2(&file_acts, pipefds[0], 0),
		  "posix_spawn_file_actions_adddup2");
	die_errno(posix_spawn_file_actions_addclose(&file_acts, pipefds[0]),
		  "posix_spawn_file_actions_addclose");
	die_errno(posix_spawn_file_actions_addclose(&file_acts, pipefds[1]),
		  "posix_spawn_file_actions_addclose");

	die_errno(posix_spawnp(&pl->pid, argv[0], &file_acts, NULL,
			       (char * const *)argv, environ),
		  "posix_spawnp: %s", argv[0]);

	die_errno(posix_spawn_file_actions_destroy(&file_acts),
		  "posix_spawn_file_actions_destroy");

	if (close(pipefds[0]))
		die_errno(errno, "close");

	pl->infd = pipefds[1];
}

int finish_pipeline(struct pipeline *pl)
{
	int status;

	if (close(pl->infd))
		die_errno(errno, "close");
	if (waitpid(pl->pid, &status, 0) < 0)
		die_errno(errno, "waitpid");
	return WIFEXITED(status) && WEXITSTATUS(status) == 0;
}