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ISCNTRL(3)               BSD Library Functions Manual               ISCNTRL(3)

NAME
     iscntrl -- control character test

LIBRARY
     Standard C Library (libc, -lc)

SYNOPSIS
     #include <ctype.h>

     int
     iscntrl(int c);

DESCRIPTION
     The iscntrl() function tests for any control character.

RETURN VALUES
     The iscntrl() function returns zero if the character tests false and
     returns non-zero if the character tests true.

SEE ALSO
     ctype(3), isalnum(3), isalpha(3), isascii(3), isblank(3), isdigit(3),
     isgraph(3), islower(3), isprint(3), ispunct(3), isspace(3), isupper(3),
     isxdigit(3), stdio(3), toascii(3), tolower(3), toupper(3), ascii(7)

STANDARDS
     The iscntrl() function conforms to ANSI X3.159-1989 ("ANSI C89").

CAVEATS
     The argument to iscntrl() must be EOF or representable as an unsigned
     char; otherwise, the behavior is undefined.  See the CAVEATS section of
     ctype(3) for more details.

BSD                             April 17, 2008                             BSD
NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUES | SEE ALSO | STANDARDS | CAVEATS