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CTERMID

Linux Programmer's Manual (3)
2013-07-04
 

NAME

ctermid - get controlling terminal name  

SYNOPSIS

#include <stdio.h>

char *ctermid(char *s);

Feature Test Macro Requirements for glibc (see feature_test_macros(7)):

ctermid(): _POSIX_C_SOURCE >= 1 || _XOPEN_SOURCE || _POSIX_SOURCE  

DESCRIPTION

ctermid() returns a string which is the pathname for the current controlling terminal for this process. If s is NULL, a static buffer is used, otherwise s points to a buffer used to hold the terminal pathname. The symbolic constant L_ctermid is the maximum number of characters in the returned pathname.  

RETURN VALUE

The pointer to the pathname.  

ATTRIBUTES

 

Multithreading (see pthreads(7))

The ctermid() function is thread-safe with exceptions. It is not thread-safe if called with a NULL parameter.  

CONFORMING TO

Svr4, POSIX.1-2001.  

BUGS

The path returned may not uniquely identify the controlling terminal; it may, for example, be /dev/tty.

It is not assured that the program can open the terminal.  

SEE ALSO

ttyname(3)  

COLOPHON

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Index

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
ATTRIBUTES
Multithreading (see pthreads(7))
CONFORMING TO
BUGS
SEE ALSO
COLOPHON

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Time: 21:42:59 GMT, July 12, 2014