/*
- * Copyright (C) 2006-2008 Kay Sievers <kay@vrfy.org>
+ * Copyright (C) 2006-2009 Kay Sievers <kay@vrfy.org>
* Copyright (C) 2009 Canonical Ltd.
* Copyright (C) 2009 Scott James Remnant <scott@netsplit.com>
*
#include <syslog.h>
#include <getopt.h>
#include <signal.h>
+#include <time.h>
+#include <sys/inotify.h>
+#include <sys/poll.h>
#include <sys/stat.h>
#include <sys/types.h>
#include "udev.h"
-#define DEFAULT_TIMEOUT 180
-#define LOOP_PER_SECOND 20
-
-static volatile sig_atomic_t is_timeout;
-
-static void sig_handler(int signum)
-{
- switch (signum) {
- case SIGALRM:
- is_timeout = 1;
- case SIGUSR1:
- ;
- }
-}
-
-int udevadm_settle(struct udev *udev, int argc, char *argv[])
+static int adm_settle(struct udev *udev, int argc, char *argv[])
{
static const struct option options[] = {
{ "seq-start", required_argument, NULL, 's' },
{ "seq-end", required_argument, NULL, 'e' },
{ "timeout", required_argument, NULL, 't' },
+ { "exit-if-exists", required_argument, NULL, 'E' },
{ "quiet", no_argument, NULL, 'q' },
{ "help", no_argument, NULL, 'h' },
{}
};
+ unsigned long long start_usec = now_usec();
unsigned long long start = 0;
unsigned long long end = 0;
int quiet = 0;
- int timeout = 0;
- struct sigaction act;
+ const char *exists = NULL;
+ unsigned int timeout = 120;
+ struct pollfd pfd[1];
struct udev_queue *udev_queue = NULL;
- int rc = 0;
+ int rc = EXIT_FAILURE;
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) {
+ for (;;) {
int option;
int seconds;
- option = getopt_long(argc, argv, "s:e:t:qh", options, NULL);
+ option = getopt_long(argc, argv, "s:e:t:E:qh", options, NULL);
if (option == -1)
break;
case 'q':
quiet = 1;
break;
+ case 'E':
+ exists = optarg;
+ break;
case 'h':
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"
+ " --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"
+ " --exit-if-exists=<file> stop waiting if file exists\n"
+ " --quiet do not print list after timeout\n"
" --help\n\n");
- goto exit;
+ exit(EXIT_SUCCESS);
+ default:
+ exit(EXIT_FAILURE);
}
}
- if (timeout > 0)
- alarm(timeout);
- else
- alarm(DEFAULT_TIMEOUT);
-
udev_queue = udev_queue_new(udev);
if (udev_queue == NULL)
- goto exit;
+ exit(2);
if (start > 0) {
unsigned long long kernel_seq;
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 (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;
}
} 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;
}
}
if (getuid() == 0) {
struct udev_ctrl *uctrl;
- uctrl = udev_ctrl_new_from_socket(udev, UDEV_CTRL_SOCK_PATH);
+ uctrl = udev_ctrl_new(udev);
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);
+ if (udev_ctrl_send_ping(uctrl, timeout) < 0) {
+ info(udev, "no connection to daemon\n");
+ udev_ctrl_unref(uctrl);
+ rc = EXIT_SUCCESS;
+ goto out;
+ }
udev_ctrl_unref(uctrl);
}
}
- while (!is_timeout) {
- /* exit if queue is empty */
- if (udev_queue_get_queue_is_empty(udev_queue))
+ pfd[0].events = POLLIN;
+ pfd[0].fd = inotify_init1(IN_CLOEXEC);
+ if (pfd[0].fd < 0) {
+ err(udev, "inotify_init failed: %m\n");
+ } else {
+ if (inotify_add_watch(pfd[0].fd, udev_get_run_path(udev), IN_MOVED_TO) < 0) {
+ err(udev, "watching '%s' failed\n", udev_get_run_path(udev));
+ close(pfd[0].fd);
+ pfd[0].fd = -1;
+ }
+ }
+
+ for (;;) {
+ struct stat statbuf;
+
+ if (exists != NULL && stat(exists, &statbuf) == 0) {
+ rc = EXIT_SUCCESS;
break;
+ }
- /* if asked for, wait for a specific sequence of events */
if (start > 0) {
- unsigned long long seq;
- int finished;
-
- finished = 0;
- for (seq = start; seq <= end; seq++) {
- finished = udev_queue_get_seqnum_is_finished(udev_queue, seq);
- if (!finished)
- break;
+ /* if asked for, wait for a specific sequence of events */
+ if (udev_queue_get_seqnum_sequence_is_finished(udev_queue, start, end) == 1) {
+ rc = EXIT_SUCCESS;
+ break;
}
- if (finished)
+ } else {
+ /* exit if queue is empty */
+ if (udev_queue_get_queue_is_empty(udev_queue)) {
+ rc = EXIT_SUCCESS;
break;
+ }
}
- usleep(1000 * 1000 / LOOP_PER_SECOND);
- }
- /* 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));
+ if (pfd[0].fd >= 0) {
+ int delay;
+
+ if (exists != NULL || start > 0)
+ delay = 100;
+ else
+ delay = 1000;
+ /* wake up after delay, or immediately after the queue is rebuilt */
+ if (poll(pfd, 1, delay) > 0 && pfd[0].revents & POLLIN) {
+ char buf[sizeof(struct inotify_event) + PATH_MAX];
+
+ read(pfd[0].fd, buf, sizeof(buf));
+ }
+ } else {
+ sleep(1);
+ }
+
+ if (timeout > 0) {
+ unsigned long long age_usec;
+
+ age_usec = now_usec() - start_usec;
+ if (age_usec / (1000 * 1000) >= timeout) {
+ struct udev_list_entry *list_entry;
+
+ if (!quiet && udev_queue_get_queued_list_entry(udev_queue) != NULL) {
+ 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));
+ }
+
+ break;
+ }
}
- rc = 1;
}
-exit:
+out:
+ if (pfd[0].fd >= 0)
+ close(pfd[0].fd);
udev_queue_unref(udev_queue);
return rc;
}
+
+const struct udevadm_cmd udevadm_settle = {
+ .name = "settle",
+ .cmd = adm_settle,
+ .help = "wait for the event queue to finish",
+};
~ianmdlvl / elogind.git / blobdiff