Name
ctermid - get controlling terminal nameLibrary
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 |
T} | 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)