void blkid__scan_dir(char *dirname, dev_t devno, struct dir_list **list,
char **devname)
{
DIR *dir;
struct dirent *dp;
struct stat st;
if ((dir = opendir(dirname)) == NULL)
return;
while ((dp = readdir(dir)) != NULL) {
#ifdef _DIRENT_HAVE_D_TYPE
if (dp->d_type != DT_UNKNOWN && dp->d_type != DT_BLK &&
dp->d_type != DT_LNK && dp->d_type != DT_DIR)
continue;
#endif
if (dp->d_name[0] == '.' &&
((dp->d_name[1] == 0) ||
((dp->d_name[1] == '.') && (dp->d_name[2] == 0))))
continue;
if (fstat_at(dirfd(dir), dirname, dp->d_name, &st, 0))
continue;
if (S_ISBLK(st.st_mode) && st.st_rdev == devno) {
*devname = blkid_strconcat(dirname, "/", dp->d_name);
DBG(DEBUG_DEVNO,
printf("found 0x%llx at %s\n", (long long)devno,
*devname));
break;
}
if (!list || !S_ISDIR(st.st_mode))
continue;
/* add subdirectory (but not symlink) to the list */
#ifdef _DIRENT_HAVE_D_TYPE
if (dp->d_type == DT_LNK)
continue;
if (dp->d_type == DT_UNKNOWN)
#endif
{
if (fstat_at(dirfd(dir), dirname, dp->d_name, &st, 1) ||
!S_ISDIR(st.st_mode))
continue; /* symlink or lstat() failed */
}
if (*dp->d_name == '.' || (
#ifdef _DIRENT_HAVE_D_TYPE
dp->d_type == DT_DIR &&
#endif
strcmp(dp->d_name, "shm") == 0))
/* ignore /dev/.{udev,mount,mdadm} and /dev/shm */
continue;
add_to_dirlist(dirname, dp->d_name, list);
}
closedir(dir);
return;
}
/*
* This function adds an entry to the directory list
*/
static void add_to_dirlist(const char *dir, const char *subdir,
struct dir_list **list)
{
struct dir_list *dp;
dp = malloc(sizeof(struct dir_list));
if (!dp)
return;
dp->name = subdir ? blkid_strconcat(dir, "/", subdir) :
blkid_strdup(dir);
if (!dp->name) {
free(dp);
return;
}
dp->next = *list;
*list = dp;
}
