ctermid(3)                 Library Functions Manual                 ctermid(3)

NAME
       ctermid - get controlling terminal name

LIBRARY
       Standard C library (libc, -lc)

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 |
       +--------------------------------------------+---------------+---------+
STANDARDS
       POSIX.1-2008.

HISTORY
       POSIX.1-2001, 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)

Linux man-pages 6.7               2023-10-31                        ctermid(3)