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/>.
32 static void help(void) {
33 printf("%s settle OPTIONS\n\n"
34 "Wait for pending udev events.\n\n"
35 " -h --help Show this help\n"
36 " --version Show package version\n"
37 " -t --timeout=SECONDS Maximum time to wait for events\n"
38 " -E --exit-if-exists=FILE Stop waiting if file exists\n"
39 , program_invocation_short_name);
42 static int adm_settle(struct udev *udev, int argc, char *argv[]) {
43 static const struct option options[] = {
44 { "timeout", required_argument, NULL, 't' },
45 { "exit-if-exists", required_argument, NULL, 'E' },
46 { "help", no_argument, NULL, 'h' },
47 { "seq-start", required_argument, NULL, 's' }, /* removed */
48 { "seq-end", required_argument, NULL, 'e' }, /* removed */
49 { "quiet", no_argument, NULL, 'q' }, /* removed */
52 const char *exists = NULL;
53 unsigned int timeout = 120;
54 struct pollfd pfd[1] = { {.fd = -1}, };
56 struct udev_queue *queue;
57 int rc = EXIT_FAILURE;
59 while ((c = getopt_long(argc, argv, "t:E:hs:e:q", options, NULL)) >= 0) {
65 r = safe_atou(optarg, &timeout);
67 fprintf(stderr, "Invalid timeout value '%s': %s\n",
68 optarg, strerror(-r));
85 log_info("Option -%c no longer supported.", c);
92 assert_not_reached("Unknown argument");
97 fprintf(stderr, "Extraneous argument: '%s'\n", argv[optind]);
101 /* guarantee that the udev daemon isn't pre-processing */
103 struct udev_ctrl *uctrl;
105 uctrl = udev_ctrl_new(udev);
107 if (udev_ctrl_send_ping(uctrl, timeout) < 0) {
108 log_debug("no connection to daemon");
109 udev_ctrl_unref(uctrl);
112 udev_ctrl_unref(uctrl);
116 queue = udev_queue_new(udev);
118 log_error("unable to get udev queue");
122 pfd[0].events = POLLIN;
123 pfd[0].fd = udev_queue_get_fd(queue);
125 log_debug("queue is empty, nothing to watch");
131 if (exists && access(exists, F_OK) >= 0) {
136 /* exit if queue is empty */
137 if (udev_queue_get_queue_is_empty(queue)) {
142 /* wake up when queue is empty */
143 if (poll(pfd, 1, MSEC_PER_SEC) > 0 && pfd[0].revents & POLLIN)
144 udev_queue_flush(queue);
148 udev_queue_unref(queue);
152 const struct udevadm_cmd udevadm_settle = {
155 .help = "Wait for pending udev events",