4 * Copyright (C) 2006 Kay Sievers <kay@vrfy.org>
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation version 2 of the License.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 675 Mass Ave, Cambridge, MA 02139, USA.
31 #include <sys/types.h>
36 #define DEFAULT_TIMEOUT 180
37 #define LOOP_PER_SECOND 20
41 void log_message(int priority, const char *format, ...)
45 if (priority > udev_log_priority)
48 va_start(args, format);
49 vsyslog(priority, format, args);
54 int main(int argc, char *argv[], char *envp[])
56 char queuename[PATH_SIZE];
57 char filename[PATH_SIZE];
58 unsigned long long seq_kernel;
59 unsigned long long seq_udev;
63 int timeout = DEFAULT_TIMEOUT;
68 logging_init("udevsettle");
70 dbg("version %s", UDEV_VERSION);
73 for (i = 1 ; i < argc; i++) {
76 if (strncmp(arg, "--timeout=", 10) == 0) {
84 fprintf(stderr, "invalid timeout value\n");
85 dbg("timeout=%i", timeout);
86 } else if (strcmp(arg, "--help") == 0 || strcmp(arg, "-h") == 0) {
87 printf("Usage: udevsettle [--help] [--timeout=<seconds>]\n");
90 fprintf(stderr, "unrecognized option '%s'\n", arg);
91 err("unrecognized option '%s'\n", arg);
95 strlcpy(queuename, udev_root, sizeof(queuename));
96 strlcat(queuename, "/" EVENT_QUEUE_DIR, sizeof(queuename));
98 loop = timeout * LOOP_PER_SECOND;
100 /* wait for events in queue to finish */
104 if (stat(queuename, &statbuf) < 0) {
105 info("queue is empty");
108 usleep(1000 * 1000 / LOOP_PER_SECOND);
111 info("timeout waiting for queue");
115 /* read current kernel seqnum */
116 strlcpy(filename, sysfs_path, sizeof(filename));
117 strlcat(filename, "/kernel/uevent_seqnum", sizeof(filename));
118 fd = open(filename, O_RDONLY);
121 len = read(fd, seqnum, sizeof(seqnum)-1);
126 seq_kernel = strtoull(seqnum, NULL, 10);
127 info("kernel seqnum = %llu", seq_kernel);
129 /* read current udev seqnum */
130 strlcpy(filename, udev_root, sizeof(filename));
131 strlcat(filename, "/" EVENT_SEQNUM, sizeof(filename));
132 fd = open(filename, O_RDONLY);
135 len = read(fd, seqnum, sizeof(seqnum)-1);
140 seq_udev = strtoull(seqnum, NULL, 10);
141 info("udev seqnum = %llu", seq_udev);
143 /* make sure all kernel events have arrived in the queue */
144 if (seq_udev >= seq_kernel) {
145 info("queue is empty and no pending events left");
149 usleep(1000 * 1000 / LOOP_PER_SECOND);
150 info("queue is empty, but events still pending");