src/libfileis/libfileis.h

/* libfileis functions return true if the condition is true and false if the
 * condition is false. Returned values are 0 or 1 only. */

/* True if file exists and is a block special file. */
	int f_blockspecial(char *path);

/* True if file exists and is a character special file. */
	int f_charspecial(char *path);

/* True if file exists and is a directory. */
	int f_directory(char *path);

/* True if file exists and is executable. */
	int f_executable(char *path);

/* True if file exists (regardless of type). */
	int f_exists(char *path);

/* True if file exists and is a named pipe (FIFO). */
	int f_fifospecial(char *path);

/* True if file exists and its set group ID flag is set. */
	int f_gid(char *path);

/* True if file exists and is readable. */
	int f_readable(char *path);

/* True if file exists and is a regular file. */
	int f_regular(char *path);

/* True if file exists and is a socket. */
	int f_socket(char *path);

/* True if file exists and its sticky bit is set. */
	int f_sticky(char *path);

/* True if file exists and is a symbolic link. */
	int f_symlink(char *path);

/* True if file exists and its set user ID flag is set. */
	int f_uid(char *path);

/* True if file exists and is writeable. */
	int f_writeable(char *path);