Function pg_file_unlink

contrib/adminpack/adminpack.c:401–429

------------------------------------ * pg_file_unlink - old version * * The superuser() check here must be kept as the library might be upgraded * without the extension being upgraded, meaning that in pre-1.1 installations * these functions could be called by any user. */

 * these functions could be called by any user.
 */
Datum
pg_file_unlink(PG_FUNCTION_ARGS)
{
	char	   *filename;

	requireSuperuser();

	filename = convert_and_check_filename(PG_GETARG_TEXT_PP(0));

	if (access(filename, W_OK) < 0)
	{
		if (errno == ENOENT)
			PG_RETURN_BOOL(false);
		else
			ereport(ERROR,
					(errcode_for_file_access(),
					 errmsg("file \"%s\" is not accessible: %m", filename)));
	}

	if (unlink(filename) < 0)
	{
		ereport(WARNING,
				(errcode_for_file_access(),
				 errmsg("could not unlink file \"%s\": %m", filename)));

		PG_RETURN_BOOL(false);
	}
	PG_RETURN_BOOL(true);
}


/* ------------------------------------