1 /* Copyright (c) 2010-2018 Dovecot authors, see the included COPYING file */
2
3 #include "lib.h"
4 #include "fs-sis-common.h"
5
6 #include <sys/stat.h>
7
fs_sis_path_parse(struct fs_file * file,const char * path,const char ** dir_r,const char ** hash_r)8 int fs_sis_path_parse(struct fs_file *file, const char *path,
9 const char **dir_r, const char **hash_r)
10 {
11 const char *fname, *p;
12
13 fname = strrchr(path, '/');
14 if (fname == NULL) {
15 *dir_r = ".";
16 fname = path;
17 } else {
18 *dir_r = t_strdup_until(path, fname);
19 fname++;
20 }
21
22 /* assume filename begins with "<hash>-" */
23 p = strchr(fname, '-');
24 if (p == NULL) {
25 fs_set_error(file->event, EINVAL, "open(%s) failed: "
26 "Filenames must begin with '<hash>-'", path);
27 return -1;
28 }
29 *hash_r = t_strdup_until(fname, p);
30 return 0;
31 }
32
fs_sis_try_unlink_hash_file(struct fs_file * sis_file,struct fs_file * super_file)33 void fs_sis_try_unlink_hash_file(struct fs_file *sis_file,
34 struct fs_file *super_file)
35 {
36 struct fs_file *hash_file;
37 struct stat st1, st2;
38 const char *dir, *hash, *hash_path;
39
40 if (fs_sis_path_parse(sis_file, super_file->path, &dir, &hash) == 0 &&
41 fs_stat(super_file, &st1) == 0 && st1.st_nlink == 2) {
42 /* this may be the last link. if hashes/ file is the same,
43 delete it. */
44 hash_path = t_strdup_printf("%s/"HASH_DIR_NAME"/%s", dir, hash);
45 hash_file = fs_file_init_with_event(super_file->fs,
46 super_file->event, hash_path,
47 FS_OPEN_MODE_READONLY);
48 if (fs_stat(hash_file, &st2) == 0 &&
49 st1.st_ino == st2.st_ino &&
50 CMP_DEV_T(st1.st_dev, st2.st_dev)) {
51 if (fs_delete(hash_file) < 0) {
52 e_error(hash_file->event, "%s",
53 fs_file_last_error(hash_file));
54 }
55 }
56 fs_file_deinit(&hash_file);
57 }
58 }
59
60