CTERMID(3) Linux Programmer's Manual CTERMID(3)NAMEctermid - 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
DESCRIPTIONctermid() 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.
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 ALSOttyname(3)COLOPHON
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GNU 2016-03-15 CTERMID(3)