/*
* 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
#include <fcntl.h>
#include <syslog.h>
#include <getopt.h>
+#include <signal.h>
#include <sys/stat.h>
#include <sys/types.h>
#define DEFAULT_TIMEOUT 180
#define LOOP_PER_SECOND 20
+static int volatile is_timeout;
+
+static void asmlinkage sig_handler(int signum)
+{
+ switch (signum) {
+ case SIGALRM:
+ is_timeout = 1;
+ case SIGUSR1:
+ ;
+ }
+}
+
int udevadm_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' },
{ "quiet", no_argument, NULL, 'q' },
{ "help", no_argument, NULL, 'h' },
{}
};
- int timeout = DEFAULT_TIMEOUT;
+ 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 loop;
int rc = 0;
dbg(udev, "version %s\n", VERSION);
+ /* set signal handlers */
+ memset(&act, 0x00, sizeof(act));
+ act.sa_handler = (void (*)(int)) sig_handler;
+ sigemptyset (&act.sa_mask);
+ act.sa_flags = 0;
+ sigaction(SIGALRM, &act, NULL);
+ sigaction(SIGUSR1, &act, NULL);
+
while (1) {
int option;
int seconds;
- option = getopt_long(argc, argv, "t:qh", options, NULL);
+ 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)
quiet = 1;
break;
case 'h':
- printf("Usage: udevadm settle [--help] [--timeout=<seconds>] [--quiet]\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;
}
}
+ if (timeout > 0)
+ alarm(timeout);
+ else
+ alarm(DEFAULT_TIMEOUT);
+
udev_queue = udev_queue_new(udev);
if (udev_queue == NULL)
goto exit;
- loop = timeout * LOOP_PER_SECOND;
- while (loop--) {
+
+ 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 (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;
+ }
+ }
+
+ /* 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);
+ udev_ctrl_unref(uctrl);
+ }
+ }
+
+ while (!is_timeout) {
+ /* exit if queue is empty */
if (udev_queue_get_queue_is_empty(udev_queue))
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 (finished)
+ break;
+ }
usleep(1000 * 1000 / LOOP_PER_SECOND);
}
/* if we reached the timeout, print the list of remaining events */
- if (loop <= 0) {
+ if (is_timeout) {
struct udev_list_entry *list_entry;
if (!quiet) {
~ianmdlvl / elogind.git / blobdiff