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 #include <unistd.h> 22 23 #include <diskusage/dirsize.h> 24 25 int64_t stat_size(struct stat *s) 26 { 27 return s->st_blocks * 512; 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; 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 56 if (fstatat(dfd, name, &s, AT_SYMLINK_NOFOLLOW) == 0) { 57 size += stat_size(&s); 58 } 59 subfd = openat(dfd, name, O_RDONLY | O_DIRECTORY); 60 if (subfd >= 0) { 61 size += calculate_dir_size(subfd); 62 } 63 } else { 64 if (fstatat(dfd, name, &s, AT_SYMLINK_NOFOLLOW) == 0) { 65 size += stat_size(&s); 66 } 67 } 68 } 69 closedir(d); 70 return size; 71 } 72
