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; }