GSP
Quick Navigator

Search Site

Unix VPS
A - Starter
B - Basic
C - Preferred
D - Commercial
MPS - Dedicated
Previous VPSs
* Sign Up! *

Support
Contact Us
Online Help
Handbooks
Domain Status
Man Pages

FAQ
Virtual Servers
Pricing
Billing
Technical

Network
Facilities
Connectivity
Topology Map

Miscellaneous
Server Agreement
Year 2038
Credits
 

USA Flag

 

 

Man Pages


Manual Reference Pages  -  ISCNTRL (3)

NAME

iscntrl - control character test

CONTENTS

Library
Synopsis
Description
Return Values
Compatibility
See Also
Standards

LIBRARY


.Lb libc

SYNOPSIS


.In ctype.h int iscntrl int c int iscntrl_l int c locale_t loc

DESCRIPTION

The iscntrl function tests for any control character. The value of the argument must be representable as an
.Vt unsigned char or the value of EOF.

In the ASCII character set, this includes the following characters (with their numeric values shown in octal):
000 NUL      001 SOH      002 STX      003 ETX      004 EOT
005 ENQ      006 ACK      007 BEL      010 BS      011 HT
012 NL      013 VT      014 NP      015 CR      016 SO
017 SI      020 DLE      021 DC1      022 DC2      023 DC3
024 DC4      025 NAK      026 SYN      027 ETB      030 CAN
031 EM      032 SUB      033 ESC      034 FS      035 GS
036 RS      037 US      177 DEL           
 

The iscntrl_l function takes an explicit locale argument, whereas the iscntrl function uses the current global or per-thread locale.

RETURN VALUES

The iscntrl function returns zero if the character tests false and returns non-zero if the character tests true.

COMPATIBILITY

The BSD 4.4 extension of accepting arguments outside of the range of the
.Vt unsigned char type in locales with large character sets is considered obsolete and may not be supported in future releases. The iswcntrl function should be used instead.

SEE ALSO

ctype(3), iswcntrl(3), xlocale(3), ascii(7)

STANDARDS

The iscntrl function conforms to -isoC. The iscntrl_l function conforms to -p1003.1-2008.
Search for    or go to Top of page |  Section 3 |  Main Index


Powered by GSP Visit the GSP FreeBSD Man Page Interface.
Output converted with manServer 1.07.