struct udev_queue_export {
struct udev *udev;
- int failed_count; /* number of failed events exported */
int queued_count; /* number of unfinished events exported in queue file */
FILE *queue_file;
unsigned long long int seqnum_max; /* earliest sequence number in queue file */
{
char filename[UTIL_PATH_SIZE];
+ if (udev_queue_export == NULL)
+ return;
util_strscpyl(filename, sizeof(filename), udev_get_run_path(udev_queue_export->udev), "/queue.tmp", NULL);
unlink(filename);
-
util_strscpyl(filename, sizeof(filename), udev_get_run_path(udev_queue_export->udev), "/queue.bin", NULL);
unlink(filename);
}
devpaths->devpaths_size = range + 1;
/* read all records and populate the table */
- while(1) {
+ for (;;) {
if (udev_queue_read_seqnum(udev_queue_export->queue_file, &seqnum) < 0)
break;
n = seqnum - udev_queue_export->seqnum_max;
len = (devpath_len < USHRT_MAX) ? devpath_len : USHRT_MAX;
if (fwrite(&len, sizeof(unsigned short), 1, udev_queue_export->queue_file) != 1)
goto write_error;
- if (fwrite(devpath, 1, len, udev_queue_export->queue_file) != len)
- goto write_error;
+ if (len > 0) {
+ if (fwrite(devpath, 1, len, udev_queue_export->queue_file) != len)
+ goto write_error;
+ }
/* *must* flush output; caller may fork */
if (fflush(udev_queue_export->queue_file) != 0)
enum device_state {
DEVICE_QUEUED,
DEVICE_FINISHED,
- DEVICE_FAILED,
};
static inline size_t queue_record_size(size_t devpath_len)
int bytes;
int err;
+ /* FINISHED records have a zero length devpath */
if (state == DEVICE_QUEUED) {
devpath = udev_device_get_devpath(udev_device);
devpath_len = strlen(devpath);
return -1;
}
- /* when the queue file grows too large, garbage-collect and rebuild it */
- bytes = ftell(udev_queue_export->queue_file) + queue_record_size(devpath_len);
-
/* if we're removing the last event from the queue, that's the best time to rebuild it */
- if (state != DEVICE_QUEUED && udev_queue_export->queued_count == 1 && bytes > 2048) {
- /* because we don't need to read the old queue file */
+ if (state != DEVICE_QUEUED && udev_queue_export->queued_count == 1) {
+ /* we don't need to read the old queue file */
fclose(udev_queue_export->queue_file);
udev_queue_export->queue_file = NULL;
rebuild_queue_file(udev_queue_export);
}
/* try to rebuild the queue files before they grow larger than one page. */
+ bytes = ftell(udev_queue_export->queue_file) + queue_record_size(devpath_len);
if ((udev_queue_export->waste_bytes > bytes / 2) && bytes > 4096)
rebuild_queue_file(udev_queue_export);
return err;
}
-static void update_failed(struct udev_queue_export *udev_queue_export,
- struct udev_device *udev_device, enum device_state state)
-{
- struct udev *udev = udev_device_get_udev(udev_device);
- char filename[UTIL_PATH_SIZE];
-
- if (state != DEVICE_FAILED && udev_queue_export->failed_count == 0)
- return;
-
- /* location of failed file */
- util_strscpyl(filename, sizeof(filename), udev_get_run_path(udev), "/failed/",
- udev_device_get_subsystem(udev_device), ":", udev_device_get_sysname(udev_device), NULL);
-
- switch (state) {
- case DEVICE_FAILED:
- /* record event in the failed directory */
- udev_queue_export->failed_count++;
- util_create_path(udev, filename);
- symlink(udev_device_get_devpath(udev_device), filename);
- break;
-
- case DEVICE_QUEUED:
- /* delete failed file */
- if (unlink(filename) == 0) {
- util_delete_path(udev, filename);
- udev_queue_export->failed_count--;
- }
- break;
-
- case DEVICE_FINISHED:
- break;
- }
-
- return;
-}
-
static int update(struct udev_queue_export *udev_queue_export,
struct udev_device *udev_device, enum device_state state)
{
- update_failed(udev_queue_export, udev_device, state);
-
if (update_queue(udev_queue_export, udev_device, state) != 0)
return -1;
{
return update(udev_queue_export, udev_device, DEVICE_FINISHED);
}
-
-int udev_queue_export_device_failed(struct udev_queue_export *udev_queue_export, struct udev_device *udev_device)
-{
- return update(udev_queue_export, udev_device, DEVICE_FAILED);
-}