--- /dev/null
+/*
+ * libudev - interface to udev device information
+ *
+ * Copyright (C) 2008 Kay Sievers <kay.sievers@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, 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 <stdio.h>
+#include <stdlib.h>
+#include <stddef.h>
+#include <unistd.h>
+#include <errno.h>
+#include <string.h>
+#include <dirent.h>
+#include <fcntl.h>
+#include <sys/stat.h>
+
+#include "libudev.h"
+#include "libudev-private.h"
+
+struct udev_queue {
+ struct udev *udev;
+ int refcount;
+ unsigned long long int last_seen_udev_seqnum;
+ struct list_node queue_list;
+ struct list_node failed_list;
+};
+
+struct udev_queue *udev_queue_new(struct udev *udev)
+{
+ struct udev_queue *udev_queue;
+
+ if (udev == NULL)
+ return NULL;
+
+ udev_queue = malloc(sizeof(struct udev_queue));
+ if (udev_queue == NULL)
+ return NULL;
+ memset(udev_queue, 0x00, sizeof(struct udev_queue));
+ udev_queue->refcount = 1;
+ udev_queue->udev = udev;
+ list_init(&udev_queue->queue_list);
+ list_init(&udev_queue->failed_list);
+ return udev_queue;
+}
+
+struct udev_queue *udev_queue_ref(struct udev_queue *udev_queue)
+{
+ if (udev_queue == NULL)
+ return NULL;
+ udev_queue->refcount++;
+ return udev_queue;
+}
+
+void udev_queue_unref(struct udev_queue *udev_queue)
+{
+ if (udev_queue == NULL)
+ return;
+ udev_queue->refcount--;
+ if (udev_queue->refcount > 0)
+ return;
+ list_cleanup(udev_queue->udev, &udev_queue->queue_list);
+ list_cleanup(udev_queue->udev, &udev_queue->failed_list);
+ free(udev_queue);
+}
+
+struct udev *udev_queue_get_udev(struct udev_queue *udev_queue)
+{
+ if (udev_queue == NULL)
+ return NULL;
+ return udev_queue->udev;
+}
+
+unsigned long long int udev_queue_get_kernel_seqnum(struct udev_queue *udev_queue)
+{
+ char filename[UTIL_PATH_SIZE];
+ unsigned long long int seqnum;
+ int fd;
+ char buf[32];
+ ssize_t len;
+
+ if (udev_queue == NULL)
+ return -EINVAL;
+ util_strlcpy(filename, udev_get_sys_path(udev_queue->udev), sizeof(filename));
+ util_strlcat(filename, "/kernel/uevent_seqnum", sizeof(filename));
+ fd = open(filename, O_RDONLY);
+ if (fd < 0)
+ return 0;
+ len = read(fd, buf, sizeof(buf));
+ close(fd);
+ if (len <= 2)
+ return 0;
+ buf[len-1] = '\0';
+ seqnum = strtoull(buf, NULL, 10);
+ info(udev_queue->udev, "seqnum=%llu\n", seqnum);
+ return seqnum;
+}
+
+unsigned long long int udev_queue_get_udev_seqnum(struct udev_queue *udev_queue)
+{
+ char filename[UTIL_PATH_SIZE];
+ unsigned long long int seqnum;
+ int fd;
+ char buf[32];
+ ssize_t len;
+
+ if (udev_queue == NULL)
+ return -EINVAL;
+ util_strlcpy(filename, udev_get_dev_path(udev_queue->udev), sizeof(filename));
+ util_strlcat(filename, "/.udev/uevent_seqnum", sizeof(filename));
+ fd = open(filename, O_RDONLY);
+ if (fd < 0)
+ return 0;
+ len = read(fd, buf, sizeof(buf));
+ close(fd);
+ if (len <= 2)
+ return 0;
+ buf[len-1] = '\0';
+ seqnum = strtoull(buf, NULL, 10);
+ info(udev_queue->udev, "seqnum=%llu\n", seqnum);
+ udev_queue->last_seen_udev_seqnum = seqnum;
+ return seqnum;
+}
+
+int udev_queue_get_queue_is_empty(struct udev_queue *udev_queue)
+{
+ char queuename[UTIL_PATH_SIZE];
+ struct stat statbuf;
+ unsigned long long int seqnum_kernel;
+
+ if (udev_queue == NULL)
+ return -EINVAL;
+ util_strlcpy(queuename, udev_get_dev_path(udev_queue->udev), sizeof(queuename));
+ util_strlcat(queuename, "/.udev/queue", sizeof(queuename));
+ if (stat(queuename, &statbuf) == 0) {
+ info(udev_queue->udev, "queue is not empty\n");
+ return 0;
+ }
+ seqnum_kernel = udev_queue_get_kernel_seqnum(udev_queue);
+ if (seqnum_kernel <= udev_queue->last_seen_udev_seqnum) {
+ info(udev_queue->udev, "queue is empty\n");
+ return 1;
+ }
+ udev_queue_get_udev_seqnum(udev_queue);
+ if (seqnum_kernel <= udev_queue->last_seen_udev_seqnum) {
+ info(udev_queue->udev, "queue is empty\n");
+ return 1;
+ }
+ info(udev_queue->udev, "queue is empty, but kernel events still pending [%llu]<->[%llu]\n",
+ seqnum_kernel, udev_queue->last_seen_udev_seqnum);
+ return 0;
+}
+
+int udev_queue_get_seqnum_is_finished(struct udev_queue *udev_queue, unsigned long long int seqnum)
+{
+ char filename[UTIL_PATH_SIZE];
+ struct stat statbuf;
+
+ if (udev_queue == NULL)
+ return -EINVAL;
+ /* if we have not seen this seqnum, check if it is/was already queued */
+ if (seqnum < udev_queue->last_seen_udev_seqnum) {
+ udev_queue_get_udev_seqnum(udev_queue);
+ if (seqnum < udev_queue->last_seen_udev_seqnum)
+ return 0;
+ }
+ snprintf(filename, sizeof(filename), "%s/.udev/queue/%llu",
+ udev_get_dev_path(udev_queue->udev), seqnum);
+ if (stat(filename, &statbuf) == 0)
+ return 0;
+ info(udev_queue->udev, "seqnum: %llu finished\n", seqnum);
+ return 1;
+}
+
+struct udev_list_entry *udev_queue_get_queued_list_entry(struct udev_queue *udev_queue)
+{
+ char path[UTIL_PATH_SIZE];
+ DIR *dir;
+ struct dirent *dent;
+
+ if (udev_queue == NULL)
+ return NULL;
+ list_cleanup(udev_queue->udev, &udev_queue->queue_list);
+ util_strlcpy(path, udev_get_dev_path(udev_queue->udev), sizeof(path));
+ util_strlcat(path, "/.udev/queue", sizeof(path));
+ dir = opendir(path);
+ if (dir == NULL)
+ return NULL;
+ for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
+ char filename[UTIL_PATH_SIZE];
+ char syspath[UTIL_PATH_SIZE];
+ size_t syslen;
+ ssize_t len;
+
+ if (dent->d_name[0] == '.')
+ continue;
+ util_strlcpy(filename, path, sizeof(filename));
+ util_strlcat(filename, "/", sizeof(filename));
+ util_strlcat(filename, dent->d_name, sizeof(filename));
+
+ syslen = util_strlcpy(syspath, udev_get_sys_path(udev_queue->udev), sizeof(syspath));
+ len = readlink(filename, &syspath[syslen], sizeof(syspath)-syslen);
+ if (len < 0 || len >= (ssize_t)(sizeof(syspath)-syslen))
+ continue;
+ syspath[syslen + len] = '\0';
+ info(udev_queue->udev, "found '%s' [%s]\n", syspath, dent->d_name);
+ list_entry_add(udev_queue->udev, &udev_queue->queue_list, syspath, dent->d_name, 0, 0);
+ }
+ closedir(dir);
+ return list_get_entry(&udev_queue->queue_list);
+}
+
+struct udev_list_entry *udev_queue_get_failed_list_entry(struct udev_queue *udev_queue)
+{
+ char path[UTIL_PATH_SIZE];
+ DIR *dir;
+ struct dirent *dent;
+
+ if (udev_queue == NULL)
+ return NULL;
+ list_cleanup(udev_queue->udev, &udev_queue->failed_list);
+ util_strlcpy(path, udev_get_dev_path(udev_queue->udev), sizeof(path));
+ util_strlcat(path, "/.udev/failed", sizeof(path));
+ dir = opendir(path);
+ if (dir == NULL)
+ return NULL;
+ for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
+ char filename[UTIL_PATH_SIZE];
+ char syspath[UTIL_PATH_SIZE];
+ struct stat statbuf;
+ size_t syslen;
+ ssize_t len;
+
+ if (dent->d_name[0] == '.')
+ continue;
+ util_strlcpy(filename, path, sizeof(filename));
+ util_strlcat(filename, "/", sizeof(filename));
+ util_strlcat(filename, dent->d_name, sizeof(filename));
+
+ syslen = util_strlcpy(syspath, udev_get_sys_path(udev_queue->udev), sizeof(syspath));
+ len = readlink(filename, &syspath[syslen], sizeof(syspath)-syslen);
+ if (len < 0 || len >= (ssize_t)(sizeof(syspath)-syslen))
+ continue;
+ syspath[syslen + len] = '\0';
+ info(udev_queue->udev, "found '%s' [%s]\n", syspath, dent->d_name);
+ util_strlcpy(filename, syspath, sizeof(filename));
+ util_strlcat(filename, "/uevent", sizeof(filename));
+ if (stat(filename, &statbuf) != 0)
+ continue;
+ list_entry_add(udev_queue->udev, &udev_queue->failed_list, syspath, NULL, 0, 0);
+ }
+ closedir(dir);
+ return list_get_entry(&udev_queue->failed_list);
+}
+
+int queue_export_udev_seqnum(struct udev_queue *udev_queue, unsigned long long int seqnum)
+{
+ return 0;
+}
+
+extern int queue_export_device_queued(struct udev_queue *udev_queue, struct udev_device *udev_device)
+{
+ return 0;
+}
+
+extern int queue_export_device_finished(struct udev_queue *udev_queue, struct udev_device *udev_device)
+{
+ return 0;
+}
+
+extern int queue_export_device_failed(struct udev_queue *udev_queue, struct udev_device *udev_device)
+{
+ return 0;
+}
#include <stdio.h>
#include <stdarg.h>
+#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
device = udev_device_new_from_syspath(udev_enumerate_get_udev(enumerate),
udev_list_entry_get_name(list_entry));
if (device != NULL) {
- printf("device: '%s' (%s) '%s'\n",
+ printf("device: '%s' (%s)\n",
udev_device_get_syspath(device),
- udev_device_get_subsystem(device),
- udev_device_get_sysname(device));
+ udev_device_get_subsystem(device));
udev_device_unref(device);
count++;
}
return 0;
}
+static int test_queue(struct udev *udev)
+{
+ struct udev_queue *udev_queue;
+ unsigned long long int seqnum;
+ struct udev_list_entry *list_entry;
+
+ udev_queue = udev_queue_new(udev);
+ if (udev_queue == NULL)
+ return -1;
+ seqnum = udev_queue_get_kernel_seqnum(udev_queue);
+ printf("seqnum kernel: %llu\n", seqnum);
+ seqnum = udev_queue_get_udev_seqnum(udev_queue);
+ printf("seqnum udev : %llu\n", seqnum);
+
+ if (udev_queue_get_queue_is_empty(udev_queue))
+ printf("queue is empty\n");
+ printf("get queue list\n");
+ udev_list_entry_foreach(list_entry, udev_queue_get_queued_list_entry(udev_queue))
+ printf("queued: '%s' [%s]\n", udev_list_entry_get_name(list_entry), udev_list_entry_get_value(list_entry));
+ printf("\n");
+ printf("get queue list again\n");
+ udev_list_entry_foreach(list_entry, udev_queue_get_queued_list_entry(udev_queue))
+ printf("queued: '%s' [%s]\n", udev_list_entry_get_name(list_entry), udev_list_entry_get_value(list_entry));
+ printf("\n");
+ printf("get failed list\n");
+ udev_list_entry_foreach(list_entry, udev_queue_get_failed_list_entry(udev_queue))
+ printf("failed: '%s'\n", udev_list_entry_get_name(list_entry));
+ printf("\n");
+
+ list_entry = udev_queue_get_queued_list_entry(udev_queue);
+ if (list_entry != NULL) {
+ printf("event [%llu] is queued\n", seqnum);
+ seqnum = strtoull(udev_list_entry_get_value(list_entry), NULL, 10);
+ if (udev_queue_get_seqnum_is_finished(udev_queue, seqnum))
+ printf("event [%llu] is not finished\n", seqnum);
+ else
+ printf("event [%llu] is finished\n", seqnum);
+ }
+ printf("\n");
+ udev_queue_unref(udev_queue);
+ return 0;
+}
+
int main(int argc, char *argv[], char *envp[])
{
struct udev *udev = NULL;
test_enumerate_print_list(udev_enumerate);
udev_enumerate_unref(udev_enumerate);
+ test_queue(udev);
+
test_monitor(udev, socket);
out:
udev_unref(udev);
~ianmdlvl / elogind.git / commitdiff