예제 #1
0
파일: packed-backend.c 프로젝트: guban/git
static void packed_transaction_cleanup(struct packed_ref_store *refs,
				       struct ref_transaction *transaction)
{
	struct packed_transaction_backend_data *data = transaction->backend_data;

	if (data) {
		string_list_clear(&data->updates, 0);

		if (is_tempfile_active(refs->tempfile))
			delete_tempfile(&refs->tempfile);

		if (data->own_lock && is_lock_file_locked(&refs->lock)) {
			packed_refs_unlock(&refs->base);
			data->own_lock = 0;
		}

		free(data);
		transaction->backend_data = NULL;
	}

	transaction->state = REF_TRANSACTION_CLOSED;
}
예제 #2
0
파일: gc.c 프로젝트: MichaelBlume/git
/* return NULL on success, else hostname running the gc */
static const char *lock_repo_for_gc(int force, pid_t* ret_pid)
{
	struct lock_file lock = LOCK_INIT;
	char my_host[HOST_NAME_MAX + 1];
	struct strbuf sb = STRBUF_INIT;
	struct stat st;
	uintmax_t pid;
	FILE *fp;
	int fd;
	char *pidfile_path;

	if (is_tempfile_active(pidfile))
		/* already locked */
		return NULL;

	if (xgethostname(my_host, sizeof(my_host)))
		xsnprintf(my_host, sizeof(my_host), "unknown");

	pidfile_path = git_pathdup("gc.pid");
	fd = hold_lock_file_for_update(&lock, pidfile_path,
				       LOCK_DIE_ON_ERROR);
	if (!force) {
		static char locking_host[HOST_NAME_MAX + 1];
		static char *scan_fmt;
		int should_exit;

		if (!scan_fmt)
			scan_fmt = xstrfmt("%s %%%ds", "%"SCNuMAX, HOST_NAME_MAX);
		fp = fopen(pidfile_path, "r");
		memset(locking_host, 0, sizeof(locking_host));
		should_exit =
			fp != NULL &&
			!fstat(fileno(fp), &st) &&
			/*
			 * 12 hour limit is very generous as gc should
			 * never take that long. On the other hand we
			 * don't really need a strict limit here,
			 * running gc --auto one day late is not a big
			 * problem. --force can be used in manual gc
			 * after the user verifies that no gc is
			 * running.
			 */
			time(NULL) - st.st_mtime <= 12 * 3600 &&
			fscanf(fp, scan_fmt, &pid, locking_host) == 2 &&
			/* be gentle to concurrent "gc" on remote hosts */
			(strcmp(locking_host, my_host) || !kill(pid, 0) || errno == EPERM);
		if (fp != NULL)
			fclose(fp);
		if (should_exit) {
			if (fd >= 0)
				rollback_lock_file(&lock);
			*ret_pid = pid;
			free(pidfile_path);
			return locking_host;
		}
	}

	strbuf_addf(&sb, "%"PRIuMAX" %s",
		    (uintmax_t) getpid(), my_host);
	write_in_full(fd, sb.buf, sb.len);
	strbuf_release(&sb);
	commit_lock_file(&lock);
	pidfile = register_tempfile(pidfile_path);
	free(pidfile_path);
	return NULL;
}