CTERMID
Section: Linux Programmer's Manual (3)
Updated: 2019-03-06
Page Index
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
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
For an explanation of the terms used in this section, see
attributes(7).
| Interface | Attribute | Value
|
|
ctermid()
| Thread safety | MT-Safe
|
CONFORMING TO
POSIX.1-2001, POSIX.1-2008, Svr4.
BUGS
The returned pathname 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
This page is part of release 5.10 of the Linux
man-pages
project.
A description of the project,
information about reporting bugs,
and the latest version of this page,
can be found at
https://www.kernel.org/doc/man-pages/.