[apple/system_cmds.git] / wait4path / wait4path.c

/*
 * Copyright (c) 2015 Apple Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 *
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this
 * file.
 *
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
 * limitations under the License.
 *
 * @APPLE_LICENSE_HEADER_END@
 */

#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/event.h>
#include <sys/stat.h>
#include <sys/types.h>

int
main(int argc, char *argv[])
{
	int kq = kqueue();
	struct kevent kev;
	struct stat sb;

	if (argc != 2) {
		fprintf(stderr, "usage: %s <object on mount point>\n", argv[0]);
		exit(EXIT_FAILURE);
	}

	EV_SET(&kev, 0, EVFILT_FS, EV_ADD, 0, 0, 0);

	if (kevent(kq, &kev, 1, NULL, 0, NULL) == -1) {
		fprintf(stderr, "adding EVFILT_FS to kqueue failed: %s\n",
				strerror(errno));
		exit(EXIT_FAILURE);
	}

	if (stat(argv[1], &sb) == 0) {
		exit(EXIT_SUCCESS);
	}

	for (;;) {
		kevent(kq, NULL, 0, &kev, 1, NULL);
		if (stat(argv[1], &sb) == 0) {
			break;
		}
	}

	exit(EXIT_SUCCESS);
}
Commit	Line	Data
cf37c299 A	1	/*
	2	* Copyright (c) 2015 Apple Inc. All rights reserved.
	3	*
	4	* @APPLE_LICENSE_HEADER_START@
	5	*
	6	* This file contains Original Code and/or Modifications of Original Code
	7	* as defined in and that are subject to the Apple Public Source License
	8	* Version 2.0 (the 'License'). You may not use this file except in
	9	* compliance with the License. Please obtain a copy of the License at
	10	* http://www.opensource.apple.com/apsl/ and read it before using this
	11	* file.
	12	*
	13	* The Original Code and all software distributed under the License are
	14	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	15	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	16	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
	17	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	18	* Please see the License for the specific language governing rights and
	19	* limitations under the License.
	20	*
	21	* @APPLE_LICENSE_HEADER_END@
	22	*/
	23
	24	#include <errno.h>
	25	#include <stdio.h>
	26	#include <stdlib.h>
	27	#include <string.h>
	28	#include <sys/event.h>
	29	#include <sys/stat.h>
	30	#include <sys/types.h>
	31
	32	int
	33	main(int argc, char *argv[])
	34	{
	35	int kq = kqueue();
	36	struct kevent kev;
	37	struct stat sb;
	38
	39	if (argc != 2) {
	40	fprintf(stderr, "usage: %s <object on mount point>\n", argv[0]);
	41	exit(EXIT_FAILURE);
	42	}
	43
	44	EV_SET(&kev, 0, EVFILT_FS, EV_ADD, 0, 0, 0);
	45
	46	if (kevent(kq, &kev, 1, NULL, 0, NULL) == -1) {
	47	fprintf(stderr, "adding EVFILT_FS to kqueue failed: %s\n",
	48	strerror(errno));
	49	exit(EXIT_FAILURE);
	50	}
	51
	52	if (stat(argv[1], &sb) == 0) {
	53	exit(EXIT_SUCCESS);
	54	}
	55
	56	for (;;) {
	57	kevent(kq, NULL, 0, &kev, 1, NULL);
	58	if (stat(argv[1], &sb) == 0) {
	59	break;
	60	}
	61	}
	62
	63	exit(EXIT_SUCCESS);
	64	}