FILE
	/usr/common/sys/stringd.c

NAME
	is_whitespace - return whether a string is entirely whitespace

PROTOTYPE
	int is_whitespace(string str)

CALLED BY
	Anybody

DESCRIPTION
	Returns true if the string consists only of whitespace such as
	space, newline or tab.

RETURN VALUE
	1 for true, 0 for false.

ERRORS
	Normally none.

SEE ALSO
	char_is_whitespace