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72 lines
1.8 KiB
72 lines
1.8 KiB
/*
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*
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* Copyright (C) 2008, The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <dirent.h>
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#include <fcntl.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include <diskusage/dirsize.h>
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int64_t stat_size(struct stat *s)
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{
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return s->st_blocks * 512;
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}
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int64_t calculate_dir_size(int dfd)
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{
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int64_t size = 0;
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struct stat s;
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DIR *d;
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struct dirent *de;
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d = fdopendir(dfd);
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if (d == NULL) {
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close(dfd);
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return 0;
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}
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while ((de = readdir(d))) {
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const char *name = de->d_name;
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if (de->d_type == DT_DIR) {
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int subfd;
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/* always skip "." and ".." */
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if (name[0] == '.') {
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if (name[1] == 0)
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continue;
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if ((name[1] == '.') && (name[2] == 0))
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continue;
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}
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if (fstatat(dfd, name, &s, AT_SYMLINK_NOFOLLOW) == 0) {
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size += stat_size(&s);
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}
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subfd = openat(dfd, name, O_RDONLY | O_DIRECTORY);
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if (subfd >= 0) {
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size += calculate_dir_size(subfd);
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}
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} else {
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if (fstatat(dfd, name, &s, AT_SYMLINK_NOFOLLOW) == 0) {
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size += stat_size(&s);
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}
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}
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}
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closedir(d);
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return size;
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}
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