Kenny Root | 33b2264 | 2010-11-30 13:49:32 -0800 | [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> |
| 21 | |
| 22 | #include <diskusage/dirsize.h> |
| 23 | |
| 24 | int64_t stat_size(struct stat *s) |
| 25 | { |
| 26 | int64_t blksize = s->st_blksize; |
| 27 | int64_t size = s->st_size; |
| 28 | |
| 29 | if (blksize) { |
| 30 | /* round up to filesystem block size */ |
| 31 | size = (size + blksize - 1) & (~(blksize - 1)); |
| 32 | } |
| 33 | |
| 34 | return size; |
| 35 | } |
| 36 | |
| 37 | int64_t calculate_dir_size(int dfd) |
| 38 | { |
| 39 | int64_t size = 0; |
| 40 | struct stat s; |
| 41 | DIR *d; |
| 42 | struct dirent *de; |
| 43 | |
| 44 | d = fdopendir(dfd); |
| 45 | if (d == NULL) { |
| 46 | close(dfd); |
| 47 | return 0; |
| 48 | } |
| 49 | |
| 50 | while ((de = readdir(d))) { |
| 51 | const char *name = de->d_name; |
| 52 | if (de->d_type == DT_DIR) { |
| 53 | int subfd; |
| 54 | |
| 55 | /* always skip "." and ".." */ |
| 56 | if (name[0] == '.') { |
| 57 | if (name[1] == 0) |
| 58 | continue; |
| 59 | if ((name[1] == '.') && (name[2] == 0)) |
| 60 | continue; |
| 61 | } |
| 62 | |
| 63 | subfd = openat(dfd, name, O_RDONLY | O_DIRECTORY); |
| 64 | if (subfd >= 0) { |
| 65 | size += calculate_dir_size(subfd); |
| 66 | } |
| 67 | } else { |
| 68 | if (fstatat(dfd, name, &s, AT_SYMLINK_NOFOLLOW) == 0) { |
| 69 | size += stat_size(&s); |
| 70 | } |
| 71 | } |
| 72 | } |
| 73 | closedir(d); |
| 74 | return size; |
| 75 | } |