getpt(3) - Linux man page

Name

getpt - open the pseudoterminal master (PTM)

#define _GNU_SOURCE             /* See feature_test_macros(7) */#include
<stdlib.h>
int getpt(void);

getpt() 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.

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.

pts(4)