getpt - open the pseudoterminal master (PTM)
#define _GNU_SOURCE /* See feature_test_macros(7) */ #include <stdlib.h>
getpt() opens a pseudoterminal master and returns its file descriptor. It is equivalent toon Linux systems, though the pseudoterminal master is located elsewhere on some systems that use GNU Libc.
open(/dev/ptmx, O_RDWR | O_NOCTTY);
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 in glibc since version 2.1.
getpt() is glibc-specific; use posix_openpt(3) instead.
grantpt(3), posix_openpt(3), ptsname(3), unlockpt(3), ptmx(4), pty(7)
This page is part of release 3.44 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/.