diff options
Diffstat (limited to '')
-rw-r--r-- | src/lib-fs/fs-sis-common.c | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/src/lib-fs/fs-sis-common.c b/src/lib-fs/fs-sis-common.c new file mode 100644 index 0000000..654c44e --- /dev/null +++ b/src/lib-fs/fs-sis-common.c @@ -0,0 +1,59 @@ +/* Copyright (c) 2010-2018 Dovecot authors, see the included COPYING file */ + +#include "lib.h" +#include "fs-sis-common.h" + +#include <sys/stat.h> + +int fs_sis_path_parse(struct fs_file *file, const char *path, + const char **dir_r, const char **hash_r) +{ + const char *fname, *p; + + fname = strrchr(path, '/'); + if (fname == NULL) { + *dir_r = "."; + fname = path; + } else { + *dir_r = t_strdup_until(path, fname); + fname++; + } + + /* assume filename begins with "<hash>-" */ + p = strchr(fname, '-'); + if (p == NULL) { + fs_set_error(file->event, EINVAL, "open(%s) failed: " + "Filenames must begin with '<hash>-'", path); + return -1; + } + *hash_r = t_strdup_until(fname, p); + return 0; +} + +void fs_sis_try_unlink_hash_file(struct fs_file *sis_file, + struct fs_file *super_file) +{ + struct fs_file *hash_file; + struct stat st1, st2; + const char *dir, *hash, *hash_path; + + if (fs_sis_path_parse(sis_file, super_file->path, &dir, &hash) == 0 && + fs_stat(super_file, &st1) == 0 && st1.st_nlink == 2) { + /* this may be the last link. if hashes/ file is the same, + delete it. */ + hash_path = t_strdup_printf("%s/"HASH_DIR_NAME"/%s", dir, hash); + hash_file = fs_file_init_with_event(super_file->fs, + super_file->event, hash_path, + FS_OPEN_MODE_READONLY); + if (fs_stat(hash_file, &st2) == 0 && + st1.st_ino == st2.st_ino && + CMP_DEV_T(st1.st_dev, st2.st_dev)) { + if (fs_delete(hash_file) < 0) { + e_error(hash_file->event, "%s", + fs_file_last_error(hash_file)); + } + } + fs_file_deinit(&hash_file); + } +} + |