GETPT(3) - man page online | library functions

Open the pseudoterminal master (PTM).

GETPT(3)                            Linux Programmer's Manual                            GETPT(3)

NAME getpt - open the pseudoterminal master (PTM)
SYNOPSIS #define _GNU_SOURCE /* See feature_test_macros(7) */ #include <stdlib.h> int getpt(void);
DESCRIPTION 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.
RETURN VALUE getpt() returns an open file descriptor upon successful completion. Otherwise, it returns -1 and sets errno to indicate the error.
ERRORS getpt() can fail with various errors described in open(2).
VERSIONS getpt() is provided in glibc since version 2.1.
ATTRIBUTES For an explanation of the terms used in this section, see attributes(7). ┌──────────┬───────────────┬─────────┐ │Interface │ Attribute │ Value │ ├──────────┼───────────────┼─────────┤ │getpt() │ Thread safety │ MT-Safe │ └──────────┴───────────────┴─────────┘
CONFORMING TO getpt() is glibc-specific; use posix_openpt(3) instead.
SEE ALSO grantpt(3), posix_openpt(3), ptsname(3), unlockpt(3), ptmx(4), pty(7)
COLOPHON This page is part of release 4.04 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
GNU 2015-03-02 GETPT(3)
This manual Reference Other manuals
getpt(3) referred by posix_openpt(3) | pts(4)
refer to attributes(7) | feature_test_macros(7) | grantpt(3) | open(2) | posix_openpt(3) | pts(4) | ptsname(3) | pty(7) | unlockpt(3)