ctermid - Man Page

Standard C library (libc, -lc)

#include <stdio.h>

char *ctermid(char *s);

ctermid():

    _POSIX_C_SOURCE

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.

The pointer to the pathname.

For an explanation of the terms used in this section, see attributes(7).

POSIX.1-2008.

POSIX.1-2001, Svr4.

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.

ttyname(3)

procenv(1), ttyname(3).