x11r4 man page for ctermid

CTERMID(3)						     Linux Programmer's Manual							CTERMID(3)

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  charac-
       ters 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 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
       This  page is part of release 4.15 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/.

GNU
								    2016-03-15								CTERMID(3)