Manpage of CTERMID
CTERMIDSection: Linux Programmer's Manual (3)
NAMEctermid - get controlling terminal name
#include <stdio.h>char *ctermid(char *s);
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
DESCRIPTIONctermid() returns a string which is the pathname for the current controlling terminal for this process. If sis NULL, a static buffer is used, otherwise spoints to a buffer used to hold the terminal pathname. The symbolic constant L_ctermidis the maximum number of characters in the returned pathname.
RETURN VALUEThe pointer to the pathname.
ATTRIBUTESFor an explanation of the terms used in this section, see attributes(7).
CONFORMING TOPOSIX.1-2001, POSIX.1-2008, Svr4.
BUGSThe path returned may not uniquely identify the controlling terminal; it may, for example, be /dev/tty.
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