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 >= 1 || _XOPEN_SOURCE || _POSIX_SOURCE
DESCRIPTION ctermid() returns a string which is the pathname for the current con- trolling terminal for this process. If s is NULL, a static buffer is used, otherwise s points to a buffer used to hold the terminal path- name. The symbolic constant L_ctermid is the maximum number of charac- ters in the returned pathname.
RETURN VALUE The pointer to the pathname.
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 This page is part of release 3.22 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.
GNU 2007-07-26 CTERMID(3)