2 * Copyright (C) 2006-2009 Kay Sievers <kay@vrfy.org>
3 * Copyright (C) 2009 Canonical Ltd.
4 * Copyright (C) 2009 Scott James Remnant <scott@netsplit.com>
6 * This program is free software: you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation, either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program. If not, see <http://www.gnu.org/licenses/>.
33 #include <sys/types.h>
36 #include "udev-util.h"
39 static void help(void) {
40 printf("%s settle OPTIONS\n\n"
41 "Wait for pending udev events.\n\n"
42 " -h --help Show this help\n"
43 " --version Show package version\n"
44 " -t --timeout=SECONDS Maximum time to wait for events\n"
45 " -E --exit-if-exists=FILE Stop waiting if file exists\n"
46 , program_invocation_short_name);
49 static int adm_settle(struct udev *udev, int argc, char *argv[]) {
50 static const struct option options[] = {
51 { "timeout", required_argument, NULL, 't' },
52 { "exit-if-exists", required_argument, NULL, 'E' },
53 { "help", no_argument, NULL, 'h' },
54 { "seq-start", required_argument, NULL, 's' }, /* removed */
55 { "seq-end", required_argument, NULL, 'e' }, /* removed */
56 { "quiet", no_argument, NULL, 'q' }, /* removed */
59 const char *exists = NULL;
60 unsigned int timeout = 120;
61 struct pollfd pfd[1] = { {.fd = -1}, };
63 struct udev_queue *queue;
64 int rc = EXIT_FAILURE;
66 while ((c = getopt_long(argc, argv, "t:E:hs:e:q", options, NULL)) >= 0) {
72 r = safe_atou(optarg, &timeout);
74 fprintf(stderr, "Invalid timeout value '%s': %s\n",
75 optarg, strerror(-r));
92 log_info("Option -%c no longer supported.", c);
99 assert_not_reached("Unknown argument");
104 fprintf(stderr, "Extraneous argument: '%s'\n", argv[optind]);
108 /* guarantee that the udev daemon isn't pre-processing */
110 struct udev_ctrl *uctrl;
112 uctrl = udev_ctrl_new(udev);
114 if (udev_ctrl_send_ping(uctrl, timeout) < 0) {
115 log_debug("no connection to daemon");
116 udev_ctrl_unref(uctrl);
119 udev_ctrl_unref(uctrl);
123 queue = udev_queue_new(udev);
125 log_error("unable to get udev queue");
129 pfd[0].events = POLLIN;
130 pfd[0].fd = udev_queue_get_fd(queue);
132 log_debug("queue is empty, nothing to watch");
138 if (exists && access(exists, F_OK) >= 0) {
143 /* exit if queue is empty */
144 if (udev_queue_get_queue_is_empty(queue)) {
149 /* wake up when queue is empty */
150 if (poll(pfd, 1, MSEC_PER_SEC) > 0 && pfd[0].revents & POLLIN)
151 udev_queue_flush(queue);
155 udev_queue_unref(queue);
159 const struct udevadm_cmd udevadm_settle = {
162 .help = "Wait for pending udev events",