CTERMID(3) BSD Library Functions Manual CTERMID(3)NAMEctermid — generate terminal pathname
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <stdio.h>
char *
ctermid(char *buf);
DESCRIPTION
The ctermid() function generates a string, that, when used as a pathname,
refers to the current controlling terminal of the calling process.
If buf is the NULL pointer, a pointer to a static area is returned. Oth‐
erwise, the pathname is copied into the memory referenced by buf. The
argument buf is assumed to point to an array at least L_ctermid bytes
long (as defined in the include file <stdio.h>).
The current implementation simply returns ‘/dev/tty’.
RETURN VALUES
Upon successful completion, a non-NULL pointer is returned. Otherwise, a
NULL pointer is returned and the global variable errno is set to indicate
the error.
ERRORS
The current implementation detects no error conditions.
SEE ALSOttyname(3)STANDARDS
The ctermid() function conforms to ISO/IEC 9945-1:1990 (“POSIX.1”).
BUGS
By default the ctermid() function writes all information to an internal
static object. Subsequent calls to ctermid() will modify the same
object.
BSD June 4, 1993 BSD