GETPT(3) Linux Programmer's Manual GETPT(3)NAMEgetpt - open the pseudoterminal master (PTM)
#define _GNU_SOURCE /* See feature_test_macros(7) */
DESCRIPTIONgetpt() opens a pseudoterminal master and returns its file descriptor.
It is equivalent to
open(/dev/ptmx, O_RDWR | O_NOCTTY);
on Linux systems, though the pseudoterminal master is located elsewhere
on some systems that use GNU Libc.
RETURN VALUEgetpt() returns an open file descriptor upon successful completion.
Otherwise, it returns -1 and sets errno to indicate the error.
ERRORSgetpt() can fail with various errors described in open(2).
VERSIONSgetpt() is provided in glibc since version 2.1.
Multithreading (see pthreads(7))
The getpt() function is thread-safe.
CONFORMING TOgetpt() is glibc-specific; use posix_openpt(3) instead.
SEE ALSOgrantpt(3), posix_openpt(3), ptsname(3), unlockpt(3), ptmx(4), pty(7)COLOPHON
This page is part of release 3.65 of the Linux man-pages project. A
description of the project, and information about reporting bugs, can
be found at http://www.kernel.org/doc/man-pages/.
GNU 2014-04-01 GETPT(3)