2 * Copyright (C) 2006-2008 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 #include <sys/types.h>
36 #define DEFAULT_TIMEOUT 180
37 #define LOOP_PER_SECOND 20
39 static int volatile is_timeout;
41 static void asmlinkage sig_handler(int signum)
51 int udevadm_settle(struct udev *udev, int argc, char *argv[])
53 static const struct option options[] = {
54 { "seq-start", required_argument, NULL, 's' },
55 { "seq-end", required_argument, NULL, 'e' },
56 { "timeout", required_argument, NULL, 't' },
57 { "quiet", no_argument, NULL, 'q' },
58 { "help", no_argument, NULL, 'h' },
61 unsigned long long start = 0;
62 unsigned long long end = 0;
66 struct udev_queue *udev_queue = NULL;
69 dbg(udev, "version %s\n", VERSION);
71 /* set signal handlers */
72 memset(&act, 0x00, sizeof(act));
73 act.sa_handler = (void (*)(int)) sig_handler;
74 sigemptyset (&act.sa_mask);
76 sigaction(SIGALRM, &act, NULL);
77 sigaction(SIGUSR1, &act, NULL);
83 option = getopt_long(argc, argv, "s:e:t:qh", options, NULL);
89 start = strtoull(optarg, NULL, 0);
92 end = strtoull(optarg, NULL, 0);
95 seconds = atoi(optarg);
99 fprintf(stderr, "invalid timeout value\n");
100 dbg(udev, "timeout=%i\n", timeout);
106 printf("Usage: udevadm settle OPTIONS\n"
107 " --timeout=<seconds> maximum time to wait for events\n"
108 " --seq-start=<seqnum> first seqnum to wait for\n"
109 " --seq-end=<seqnum> last seqnum to wait for\n"
110 " --quiet do not print list after timeout\n"
119 alarm(DEFAULT_TIMEOUT);
121 udev_queue = udev_queue_new(udev);
122 if (udev_queue == NULL)
126 unsigned long long kernel_seq;
128 kernel_seq = udev_queue_get_kernel_seqnum(udev_queue);
130 /* unless specified, the last event is the current kernel seqnum */
132 end = udev_queue_get_kernel_seqnum(udev_queue);
135 err(udev, "seq-start larger than seq-end, ignoring\n");
136 fprintf(stderr, "seq-start larger than seq-end, ignoring\n");
141 if (start > kernel_seq || end > kernel_seq) {
142 err(udev, "seq-start or seq-end larger than current kernel value, ignoring\n");
143 fprintf(stderr, "seq-start or seq-end larger than current kernel value, ignoring\n");
147 info(udev, "start=%llu end=%llu current=%llu\n", start, end, kernel_seq);
150 err(udev, "seq-end needs seq-start parameter, ignoring\n");
151 fprintf(stderr, "seq-end needs seq-start parameter, ignoring\n");
156 /* guarantee that the udev daemon isn't pre-processing */
158 struct udev_ctrl *uctrl;
160 uctrl = udev_ctrl_new_from_socket(udev, UDEV_CTRL_SOCK_PATH);
162 sigset_t mask, oldmask;
165 sigaddset(&mask, SIGUSR1);
166 sigaddset(&mask, SIGALRM);
167 sigprocmask(SIG_BLOCK, &mask, &oldmask);
168 if (udev_ctrl_send_settle(uctrl) > 0)
169 sigsuspend(&oldmask);
170 udev_ctrl_unref(uctrl);
174 while (!is_timeout) {
175 /* exit if queue is empty */
176 if (udev_queue_get_queue_is_empty(udev_queue))
179 /* if asked for, wait for a specific sequence of events */
181 unsigned long long seq;
185 for (seq = start; seq <= end; seq++) {
186 finished = udev_queue_get_seqnum_is_finished(udev_queue, seq);
193 usleep(1000 * 1000 / LOOP_PER_SECOND);
196 /* if we reached the timeout, print the list of remaining events */
198 struct udev_list_entry *list_entry;
201 info(udev, "timeout waiting for udev queue\n");
202 printf("\nudevadm settle - timeout of %i seconds reached, the event queue contains:\n", timeout);
203 udev_list_entry_foreach(list_entry, udev_queue_get_queued_list_entry(udev_queue))
205 udev_list_entry_get_name(list_entry),
206 udev_list_entry_get_value(list_entry));
211 udev_queue_unref(udev_queue);