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NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | VERSIONS | ATTRIBUTES | CONFORMING TO | SEE ALSO | COLOPHON |
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GETPT(3) Linux Programmer's Manual GETPT(3)
getpt - open a new pseudoterminal master
#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 in glibc since version 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)
This page is part of release 5.11 of the Linux man-pages project.
A description of the project, information about reporting bugs,
and the latest version of this page, can be found at
https://www.kernel.org/doc/man-pages/.
GNU 2021-03-22 GETPT(3)
Pages that refer to this page: posix_openpt(3), pts(4)
Copyright and license for this manual page
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