Mike Lockwood | 126d215 | 2012-10-24 12:28:57 -0700 | [diff] [blame] | 1 | /* |
| 2 | * |
| 3 | * Copyright (C) 2008, The Android Open Source Project |
| 4 | * |
| 5 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 6 | * you may not use this file except in compliance with the License. |
| 7 | * You may obtain a copy of the License at |
| 8 | * |
| 9 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 10 | * |
| 11 | * Unless required by applicable law or agreed to in writing, software |
| 12 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 13 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 14 | * See the License for the specific language governing permissions and |
| 15 | * limitations under the License. |
| 16 | */ |
| 17 | |
| 18 | #include <dirent.h> |
| 19 | #include <fcntl.h> |
| 20 | #include <sys/stat.h> |
Elliott Hughes | 14df356 | 2015-02-19 16:58:44 -0800 | [diff] [blame] | 21 | #include <unistd.h> |
Mike Lockwood | 126d215 | 2012-10-24 12:28:57 -0700 | [diff] [blame] | 22 | |
| 23 | #include <diskusage/dirsize.h> |
| 24 | |
| 25 | int64_t stat_size(struct stat *s) |
| 26 | { |
Jeff Sharkey | 2f720f7 | 2016-04-10 20:51:40 -0600 | [diff] [blame] | 27 | return s->st_blocks * 512; |
Mike Lockwood | 126d215 | 2012-10-24 12:28:57 -0700 | [diff] [blame] | 28 | } |
| 29 | |
| 30 | int64_t calculate_dir_size(int dfd) |
| 31 | { |
| 32 | int64_t size = 0; |
| 33 | struct stat s; |
| 34 | DIR *d; |
| 35 | struct dirent *de; |
| 36 | |
| 37 | d = fdopendir(dfd); |
| 38 | if (d == NULL) { |
| 39 | close(dfd); |
| 40 | return 0; |
| 41 | } |
| 42 | |
| 43 | while ((de = readdir(d))) { |
| 44 | const char *name = de->d_name; |
Mike Lockwood | 126d215 | 2012-10-24 12:28:57 -0700 | [diff] [blame] | 45 | if (de->d_type == DT_DIR) { |
| 46 | int subfd; |
| 47 | |
| 48 | /* always skip "." and ".." */ |
| 49 | if (name[0] == '.') { |
| 50 | if (name[1] == 0) |
| 51 | continue; |
| 52 | if ((name[1] == '.') && (name[2] == 0)) |
| 53 | continue; |
| 54 | } |
| 55 | |
Jeff Sharkey | 2f720f7 | 2016-04-10 20:51:40 -0600 | [diff] [blame] | 56 | if (fstatat(dfd, name, &s, AT_SYMLINK_NOFOLLOW) == 0) { |
| 57 | size += stat_size(&s); |
| 58 | } |
Mike Lockwood | 126d215 | 2012-10-24 12:28:57 -0700 | [diff] [blame] | 59 | subfd = openat(dfd, name, O_RDONLY | O_DIRECTORY); |
| 60 | if (subfd >= 0) { |
| 61 | size += calculate_dir_size(subfd); |
| 62 | } |
Jeff Sharkey | 2f720f7 | 2016-04-10 20:51:40 -0600 | [diff] [blame] | 63 | } else { |
| 64 | if (fstatat(dfd, name, &s, AT_SYMLINK_NOFOLLOW) == 0) { |
| 65 | size += stat_size(&s); |
| 66 | } |
Mike Lockwood | 126d215 | 2012-10-24 12:28:57 -0700 | [diff] [blame] | 67 | } |
| 68 | } |
| 69 | closedir(d); |
| 70 | return size; |
| 71 | } |