/*
* This function finds the pathname to a block device with a given
* device number. It returns a pointer to allocated memory to the
* pathname on success, and NULL on failure.
*/
char *blkid_devno_to_devname(dev_t devno)
{
struct dir_list *list = NULL, *new_list = NULL;
char *devname = NULL;
const char **dir;
/*
* Add the starting directories to search in reverse order of
* importance, since we are using a stack...
*/
for (dir = devdirs; *dir; dir++)
add_to_dirlist(*dir, &list);
while (list) {
struct dir_list *current = list;
list = list->next;
DBG(DEBUG_DEVNO, printf("directory %s\n", current->name));
blkid__scan_dir(current->name, devno, &new_list, &devname);
free(current->name);
free(current);
if (devname)
break;
/*
* If we're done checking at this level, descend to
* the next level of subdirectories. (breadth-first)
*/
if (list == NULL) {
list = new_list;
new_list = NULL;
}
}
free_dirlist(&list);
free_dirlist(&new_list);
if (!devname) {
DBG(DEBUG_DEVNO,
printf("blkid: couldn't find devno 0x%04lx\n",
(unsigned long) devno));
} else {
DBG(DEBUG_DEVNO,
printf("found devno 0x%04llx as %s\n", (long long)devno, devname));
}
return devname;
}
static char *scandev_devno_to_devpath(dev_t devno)
{
struct dir_list *list = NULL, *new_list = NULL;
char *devname = NULL;
const char **dir;
/*
* Add the starting directories to search in reverse order of
* importance, since we are using a stack...
*/
for (dir = devdirs; *dir; dir++)
add_to_dirlist(*dir, NULL, &list);
while (list) {
struct dir_list *current = list;
list = list->next;
DBG(DEVNO, ul_debug("directory %s", current->name));
blkid__scan_dir(current->name, devno, &new_list, &devname);
free(current->name);
free(current);
if (devname)
break;
/*
* If we're done checking at this level, descend to
* the next level of subdirectories. (breadth-first)
*/
if (list == NULL) {
list = new_list;
new_list = NULL;
}
}
free_dirlist(&list);
free_dirlist(&new_list);
return devname;
}