/*
- * Copyright (C) 2006 Kay Sievers <kay@vrfy.org>
+ * Copyright (C) 2006-2008 Kay Sievers <kay@vrfy.org>
+ * Copyright (C) 2009 Canonical Ltd.
+ * Copyright (C) 2009 Scott James Remnant <scott@netsplit.com>
*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation version 2 of the License.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
*
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdlib.h>
#include <fcntl.h>
#include <syslog.h>
#include <getopt.h>
+#include <signal.h>
#include <sys/stat.h>
#include <sys/types.h>
#include "udev.h"
-#include "udevd.h"
#define DEFAULT_TIMEOUT 180
#define LOOP_PER_SECOND 20
-static void print_queue(const char *dir)
-{
- LIST_HEAD(files);
- struct name_entry *item;
-
- if (add_matching_files(&files, dir, NULL) < 0)
- return;
-
- printf("\n\nAfter the udevadm settle timeout, the events queue contains:\n\n");
-
- list_for_each_entry(item, &files, node) {
- char target[NAME_SIZE];
- size_t len;
- const char *filename = strrchr(item->name, '/');
+static volatile sig_atomic_t is_timeout;
- if (filename == NULL)
- continue;
- filename++;
- if (*filename == '\0')
- continue;
-
- len = readlink(item->name, target, sizeof(target));
- if (len < 0)
- continue;
- target[len] = '\0';
-
- printf("%s: %s\n", filename, target);
+static void sig_handler(int signum)
+{
+ switch (signum) {
+ case SIGALRM:
+ is_timeout = 1;
+ case SIGUSR1:
+ ;
}
-
- printf("\n\n");
}
-int udevadm_settle(int argc, char *argv[])
+int udevadm_settle(struct udev *udev, int argc, char *argv[])
{
- char queuename[PATH_SIZE];
- char filename[PATH_SIZE];
- unsigned long long seq_kernel;
- unsigned long long seq_udev;
- char seqnum[32];
- int fd;
- ssize_t len;
- int timeout = DEFAULT_TIMEOUT;
- int loop;
static const struct option options[] = {
- { "timeout", 1, NULL, 't' },
- { "help", 0, NULL, 'h' },
+ { "seq-start", required_argument, NULL, 's' },
+ { "seq-end", required_argument, NULL, 'e' },
+ { "timeout", required_argument, NULL, 't' },
+ { "quiet", no_argument, NULL, 'q' },
+ { "help", no_argument, NULL, 'h' },
{}
};
- int option;
- int rc = 1;
- int seconds;
-
- logging_init("udevsettle");
- udev_config_init();
- dbg("version %s\n", VERSION);
- sysfs_init();
+ unsigned long long start = 0;
+ unsigned long long end = 0;
+ int quiet = 0;
+ int timeout = 0;
+ struct sigaction act;
+ struct udev_queue *udev_queue = NULL;
+ int rc = 0;
+
+ dbg(udev, "version %s\n", VERSION);
+
+ /* set signal handlers */
+ memset(&act, 0x00, sizeof(act));
+ act.sa_handler = sig_handler;
+ sigemptyset (&act.sa_mask);
+ act.sa_flags = 0;
+ sigaction(SIGALRM, &act, NULL);
+ sigaction(SIGUSR1, &act, NULL);
while (1) {
- option = getopt_long(argc, argv, "t:h", options, NULL);
+ int option;
+ int seconds;
+
+ option = getopt_long(argc, argv, "s:e:t:qh", options, NULL);
if (option == -1)
break;
switch (option) {
+ case 's':
+ start = strtoull(optarg, NULL, 0);
+ break;
+ case 'e':
+ end = strtoull(optarg, NULL, 0);
+ break;
case 't':
seconds = atoi(optarg);
- if (seconds > 0)
+ if (seconds >= 0)
timeout = seconds;
else
fprintf(stderr, "invalid timeout value\n");
- dbg("timeout=%i\n", timeout);
+ dbg(udev, "timeout=%i\n", timeout);
+ break;
+ case 'q':
+ quiet = 1;
break;
case 'h':
- printf("Usage: udevadm settle [--help] [--timeout=<seconds>]\n\n");
+ printf("Usage: udevadm settle OPTIONS\n"
+ " --timeout=<seconds> maximum time to wait for events\n"
+ " --seq-start=<seqnum> first seqnum to wait for\n"
+ " --seq-end=<seqnum> last seqnum to wait for\n"
+ " --quiet do not print list after timeout\n"
+ " --help\n\n");
goto exit;
}
}
- strlcpy(queuename, udev_root, sizeof(queuename));
- strlcat(queuename, "/.udev/queue", sizeof(queuename));
+ if (timeout > 0)
+ alarm(timeout);
+ else
+ alarm(DEFAULT_TIMEOUT);
- loop = timeout * LOOP_PER_SECOND;
- while (loop--) {
- /* wait for events in queue to finish */
- while (loop--) {
- struct stat statbuf;
+ udev_queue = udev_queue_new(udev);
+ if (udev_queue == NULL)
+ goto exit;
- if (stat(queuename, &statbuf) < 0) {
- info("queue is empty\n");
- break;
- }
- usleep(1000 * 1000 / LOOP_PER_SECOND);
+ if (start > 0) {
+ unsigned long long kernel_seq;
+
+ kernel_seq = udev_queue_get_kernel_seqnum(udev_queue);
+
+ /* unless specified, the last event is the current kernel seqnum */
+ if (end == 0)
+ end = udev_queue_get_kernel_seqnum(udev_queue);
+
+ if (start > end) {
+ err(udev, "seq-start larger than seq-end, ignoring\n");
+ fprintf(stderr, "seq-start larger than seq-end, ignoring\n");
+ start = 0;
+ end = 0;
}
- if (loop <= 0) {
- info("timeout waiting for queue\n");
- print_queue(queuename);
- goto exit;
+
+ if (start > kernel_seq || end > kernel_seq) {
+ err(udev, "seq-start or seq-end larger than current kernel value, ignoring\n");
+ fprintf(stderr, "seq-start or seq-end larger than current kernel value, ignoring\n");
+ start = 0;
+ end = 0;
+ }
+ info(udev, "start=%llu end=%llu current=%llu\n", start, end, kernel_seq);
+ } else {
+ if (end > 0) {
+ err(udev, "seq-end needs seq-start parameter, ignoring\n");
+ fprintf(stderr, "seq-end needs seq-start parameter, ignoring\n");
+ end = 0;
}
+ }
- /* read current udev seqnum */
- strlcpy(filename, udev_root, sizeof(filename));
- strlcat(filename, "/.udev/uevent_seqnum", sizeof(filename));
- fd = open(filename, O_RDONLY);
- if (fd < 0)
- goto exit;
- len = read(fd, seqnum, sizeof(seqnum)-1);
- close(fd);
- if (len <= 0)
- goto exit;
- seqnum[len] = '\0';
- seq_udev = strtoull(seqnum, NULL, 10);
- info("udev seqnum = %llu\n", seq_udev);
-
- /* read current kernel seqnum */
- strlcpy(filename, sysfs_path, sizeof(filename));
- strlcat(filename, "/kernel/uevent_seqnum", sizeof(filename));
- fd = open(filename, O_RDONLY);
- if (fd < 0)
- goto exit;
- len = read(fd, seqnum, sizeof(seqnum)-1);
- close(fd);
- if (len <= 0)
- goto exit;
- seqnum[len] = '\0';
- seq_kernel = strtoull(seqnum, NULL, 10);
- info("kernel seqnum = %llu\n", seq_kernel);
-
- /* make sure all kernel events have arrived in the queue */
- if (seq_udev >= seq_kernel) {
- info("queue is empty and no pending events left\n");
- rc = 0;
- goto exit;
+ /* guarantee that the udev daemon isn't pre-processing */
+ if (getuid() == 0) {
+ struct udev_ctrl *uctrl;
+
+ uctrl = udev_ctrl_new_from_socket(udev, UDEV_CTRL_SOCK_PATH);
+ if (uctrl != NULL) {
+ sigset_t mask, oldmask;
+
+ sigemptyset(&mask);
+ sigaddset(&mask, SIGUSR1);
+ sigaddset(&mask, SIGALRM);
+ sigprocmask(SIG_BLOCK, &mask, &oldmask);
+ if (udev_ctrl_send_settle(uctrl) > 0)
+ sigsuspend(&oldmask);
+ sigprocmask(SIG_SETMASK, &oldmask, NULL);
+ udev_ctrl_unref(uctrl);
}
+ }
+
+ while (!is_timeout) {
+ if (start > 0) {
+ /* if asked for, wait for a specific sequence of events */
+ if (udev_queue_get_seqnum_sequence_is_finished(udev_queue, start, end) == 1)
+ break;
+ } else {
+ /* exit if queue is empty */
+ if (udev_queue_get_queue_is_empty(udev_queue))
+ break;
+ }
+
usleep(1000 * 1000 / LOOP_PER_SECOND);
- info("queue is empty, but events still pending\n");
}
+ /* if we reached the timeout, print the list of remaining events */
+ if (is_timeout) {
+ struct udev_list_entry *list_entry;
+
+ if (!quiet) {
+ info(udev, "timeout waiting for udev queue\n");
+ printf("\nudevadm settle - timeout of %i seconds reached, the event queue contains:\n", timeout);
+ udev_list_entry_foreach(list_entry, udev_queue_get_queued_list_entry(udev_queue))
+ printf(" %s (%s)\n",
+ udev_list_entry_get_name(list_entry),
+ udev_list_entry_get_value(list_entry));
+ }
+ rc = 1;
+ }
exit:
- sysfs_cleanup();
- logging_close();
+ udev_queue_unref(udev_queue);
return rc;
}
~ianmdlvl / elogind.git / blobdiff