udevadm: rename source files

1 files changed, 178 insertions, 0 deletions

diff --git a/udev/udevadm-settle.c b/udev/udevadm-settle.c
new file mode 100644
index 0000000000..11277f5a43
--- /dev/null
+++ b/udev/udevadm-settle.c
@@ -0,0 +1,178 @@
+/*
+ * Copyright (C) 2006 Kay Sievers <kay@vrfy.org>
+ *
+ *	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.
+ *
+ */
+
+#include <stdlib.h>
+#include <stddef.h>
+#include <string.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <errno.h>
+#include <dirent.h>
+#include <fcntl.h>
+#include <syslog.h>
+#include <getopt.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, '/');
+
+		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);
+	}
+
+	printf("\n\n");
+}
+
+int udevsettle(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' },
+		{}
+	};
+	int option;
+	int rc = 1;
+	int seconds;
+
+	logging_init("udevsettle");
+	udev_config_init();
+	dbg("version %s\n", VERSION);
+	sysfs_init();
+
+	while (1) {
+		option = getopt_long(argc, argv, "t:h", options, NULL);
+		if (option == -1)
+			break;
+
+		switch (option) {
+		case 't':
+			seconds = atoi(optarg);
+			if (seconds > 0)
+				timeout = seconds;
+			else
+				fprintf(stderr, "invalid timeout value\n");
+			dbg("timeout=%i\n", timeout);
+			break;
+		case 'h':
+			printf("Usage: udevadm settle [--help] [--timeout=<seconds>]\n\n");
+			goto exit;
+		}
+	}
+
+	strlcpy(queuename, udev_root, sizeof(queuename));
+	strlcat(queuename, "/.udev/queue", sizeof(queuename));
+
+	loop = timeout * LOOP_PER_SECOND;
+	while (loop--) {
+		/* wait for events in queue to finish */
+		while (loop--) {
+			struct stat statbuf;
+
+			if (stat(queuename, &statbuf) < 0) {
+				info("queue is empty\n");
+				break;
+			}
+			usleep(1000 * 1000 / LOOP_PER_SECOND);
+		}
+		if (loop <= 0) {
+			info("timeout waiting for queue\n");
+			print_queue(queuename);
+			goto exit;
+		}
+
+		/* 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;
+		}
+		usleep(1000 * 1000 / LOOP_PER_SECOND);
+		info("queue is empty, but events still pending\n");
+	}
+
+exit:
+	sysfs_cleanup();
+	logging_close();
+	return rc;
+}