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/* 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);
}
}
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