static int maildir_keywords_commit(struct maildir_keywords *mk)
{
const struct mailbox_permissions *perm;
struct dotlock *dotlock;
const char *lock_path;
mode_t old_mask;
int i, fd;
mk->synced = FALSE;
if (!mk->changed || mk->mbox == NULL)
return 0;
lock_path = t_strconcat(mk->path, ".lock", NULL);
i_unlink_if_exists(lock_path);
perm = mailbox_get_permissions(&mk->mbox->box);
for (i = 0;; i++) {
/* we could just create the temp file directly, but doing it
this ways avoids potential problems with overwriting
contents in malicious symlinks */
old_mask = umask(0777 & ~perm->file_create_mode);
fd = file_dotlock_open(&mk->dotlock_settings, mk->path,
DOTLOCK_CREATE_FLAG_NONBLOCK, &dotlock);
umask(old_mask);
if (fd != -1)
break;
if (errno != ENOENT || i == MAILDIR_DELETE_RETRY_COUNT) {
mail_storage_set_critical(mk->storage,
"file_dotlock_open(%s) failed: %m", mk->path);
return -1;
}
/* the control dir doesn't exist. create it unless the whole
mailbox was just deleted. */
if (!maildir_set_deleted(&mk->mbox->box))
return -1;
}
if (maildir_keywords_write_fd(mk, lock_path, fd) < 0) {
file_dotlock_delete(&dotlock);
return -1;
}
if (file_dotlock_replace(&dotlock, 0) < 0) {
mail_storage_set_critical(mk->storage,
"file_dotlock_replace(%s) failed: %m", mk->path);
return -1;
}
mk->changed = FALSE;
return 0;
}
int mail_transaction_log_file_create(struct mail_transaction_log_file *file,
bool reset)
{
struct mail_index *index = file->log->index;
struct dotlock_settings new_dotlock_set;
struct dotlock *dotlock;
mode_t old_mask;
int fd, ret;
i_assert(!MAIL_INDEX_IS_IN_MEMORY(index));
if (file->log->index->readonly) {
mail_index_set_error(index,
"Can't create log file %s: Index is read-only",
file->filepath);
return -1;
}
mail_transaction_log_get_dotlock_set(file->log, &new_dotlock_set);
new_dotlock_set.lock_suffix = LOG_NEW_DOTLOCK_SUFFIX;
/* With dotlocking we might already have path.lock created, so this
filename has to be different. */
old_mask = umask(index->mode ^ 0666);
fd = file_dotlock_open(&new_dotlock_set, file->filepath, 0, &dotlock);
umask(old_mask);
if (fd == -1) {
log_file_set_syscall_error(file, "file_dotlock_open()");
return -1;
}
mail_index_fchown(index, fd, file_dotlock_get_lock_path(dotlock));
/* either fd gets used or the dotlock gets deleted and returned fd
is for the existing file */
ret = mail_transaction_log_file_create2(file, fd, reset, &dotlock);
if (ret < 0) {
if (dotlock != NULL)
file_dotlock_delete(&dotlock);
return -1;
}
return ret;
}
