X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=udev%2Fudevadm-settle.c;h=1423cec6dc72c44108fb328f8d3878ae81797b20;hp=f1052aa14896f11d698736c7b0fd2b2f06dce2bf;hb=2d74bc75792bdd993e6298cf253541624001517c;hpb=f503f6b22fa54d1a65156a51d8b3311190c73ae5

diff --git a/udev/udevadm-settle.c b/udev/udevadm-settle.c
index f1052aa14..1423cec6d 100644
--- a/udev/udevadm-settle.c
+++ b/udev/udevadm-settle.c
@@ -1,5 +1,5 @@
 /*
- * 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>
  *
@@ -28,6 +28,7 @@
 #include <syslog.h>
 #include <getopt.h>
 #include <signal.h>
+#include <time.h>
 #include <sys/stat.h>
 #include <sys/types.h>
 
@@ -54,6 +55,7 @@ int udevadm_settle(struct udev *udev, int argc, char *argv[])
 		{ "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' },
 		{}
@@ -61,10 +63,12 @@ int udevadm_settle(struct udev *udev, int argc, char *argv[])
 	unsigned long long start = 0;
 	unsigned long long end = 0;
 	int quiet = 0;
-	int timeout = 0;
+	const char *exists = NULL;
+	int timeout = DEFAULT_TIMEOUT;
 	struct sigaction act;
+	sigset_t mask;
 	struct udev_queue *udev_queue = NULL;
-	int rc = 0;
+	int rc = 1;
 
 	dbg(udev, "version %s\n", VERSION);
 
@@ -75,12 +79,16 @@ int udevadm_settle(struct udev *udev, int argc, char *argv[])
 	act.sa_flags = 0;
 	sigaction(SIGALRM, &act, NULL);
 	sigaction(SIGUSR1, &act, NULL);
+	sigemptyset(&mask);
+	sigaddset(&mask, SIGUSR1);
+	sigaddset(&mask, SIGALRM);
+	sigprocmask(SIG_UNBLOCK, &mask, 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;
 
@@ -102,25 +110,29 @@ int udevadm_settle(struct udev *udev, int argc, char *argv[])
 		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(0);
 		}
 	}
 
 	if (timeout > 0)
 		alarm(timeout);
 	else
-		alarm(DEFAULT_TIMEOUT);
+		is_timeout = 1;
 
 	udev_queue = udev_queue_new(udev);
 	if (udev_queue == NULL)
-		goto exit;
+		exit(2);
 
 	if (start > 0) {
 		unsigned long long kernel_seq;
@@ -133,14 +145,12 @@ int udevadm_settle(struct udev *udev, int argc, char *argv[])
 
 		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;
 		}
@@ -148,7 +158,6 @@ int udevadm_settle(struct udev *udev, int argc, char *argv[])
 	} 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;
 		}
 	}
@@ -159,7 +168,7 @@ int udevadm_settle(struct udev *udev, int argc, char *argv[])
 
 		uctrl = udev_ctrl_new_from_socket(udev, UDEV_CTRL_SOCK_PATH);
 		if (uctrl != NULL) {
-			sigset_t mask, oldmask;
+			sigset_t oldmask;
 
 			sigemptyset(&mask);
 			sigaddset(&mask, SIGUSR1);
@@ -172,25 +181,40 @@ int udevadm_settle(struct udev *udev, int argc, char *argv[])
 		}
 	}
 
-	while (!is_timeout) {
+	for (;;) {
+		struct stat statbuf;
+		const struct timespec duration = { 0 , 1000 * 1000 * 1000 / LOOP_PER_SECOND };
+
+		if (exists != NULL && stat(exists, &statbuf) == 0) {
+			rc = 0;
+			break;
+		}
+
 		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)
+			if (udev_queue_get_seqnum_sequence_is_finished(udev_queue, start, end) == 1) {
+				rc = 0;
 				break;
+			}
 		} else {
 			/* exit if queue is empty */
-			if (udev_queue_get_queue_is_empty(udev_queue))
+			if (udev_queue_get_queue_is_empty(udev_queue)) {
+				rc = 0;
 				break;
+			}
 		}
 
-		usleep(1000 * 1000 / LOOP_PER_SECOND);
+		if (is_timeout)
+			break;
+
+		nanosleep(&duration, NULL);
 	}
 
 	/* if we reached the timeout, print the list of remaining events */
 	if (is_timeout) {
 		struct udev_list_entry *list_entry;
 
-		if (!quiet) {
+		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))
@@ -198,9 +222,8 @@ int udevadm_settle(struct udev *udev, int argc, char *argv[])
 				       udev_list_entry_get_name(list_entry),
 				       udev_list_entry_get_value(list_entry));
 		}
-		rc = 1;
 	}
-exit:
+
 	udev_queue_unref(udev_queue);
 	return rc;
 }