getpt - open a new pseudoterminal master
Standard C library (
libc,
-lc)
#define _GNU_SOURCE /* See feature_test_macros(7) */
#include <stdlib.h>
int getpt(void);
getpt() opens a new pseudoterminal device and returns a file descriptor
that refers to that device. It is equivalent to opening the pseudoterminal
multiplexor device
open("/dev/ptmx", O_RDWR);
on Linux systems, though the pseudoterminal multiplexor device is located
elsewhere on some systems that use the GNU C library.
getpt() returns an open file descriptor upon successful completion.
Otherwise, it returns -1 and sets
errno to indicate the error.
getpt() can fail with various errors described in
open(2).
getpt() is provided since glibc 2.1.
For an explanation of the terms used in this section, see
attributes(7).
Interface |
Attribute |
Value |
getpt () |
Thread safety |
MT-Safe |
getpt() is glibc-specific; use
posix_openpt(3) instead.
grantpt(3),
posix_openpt(3),
ptsname(3),
unlockpt(3),
ptmx(4),
pty(7)