CTERMID - reference manual online

Get controlling terminal name.

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 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 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 4.04 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
GNU 2015-08-08 CTERMID(3)
This manual Reference Other manuals
ctermid(3) referred by procenv(1) | ttyname(3)
refer to attributes(7) | feature_test_macros(7) | ttyname(3)