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NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | ATTRIBUTES | VERSIONS | STANDARDS | HISTORY | SEE ALSO | COLOPHON |
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getpt(3) Library Functions Manual getpt(3)
getpt - open a new pseudoterminal master
Standard C library (libc, -lc)
#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).
For an explanation of the terms used in this section, see
attributes(7).
┌──────────────────────────────────────┬───────────────┬─────────┐
│ Interface │ Attribute │ Value │
├──────────────────────────────────────┼───────────────┼─────────┤
│ getpt() │ Thread safety │ MT-Safe │
└──────────────────────────────────────┴───────────────┴─────────┘
Use posix_openpt(3) instead.
GNU.
glibc 2.1.
grantpt(3), posix_openpt(3), ptsname(3), unlockpt(3), ptmx(4),
pty(7)
This page is part of the man-pages (Linux kernel and C library
user-space interface documentation) project. Information about
the project can be found at
⟨https://www.kernel.org/doc/man-pages/⟩. If you have a bug report
for this manual page, see
⟨https://git.kernel.org/pub/scm/docs/man-pages/man-pages.git/tree/CONTRIBUTING⟩.
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⟨https://mirrors.edge.kernel.org/pub/linux/docs/man-pages/⟩ on
2025-02-02. If you discover any rendering problems in this HTML
version of the page, or you believe there is a better or more up-
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man-pages@man7.org
Linux man-pages 6.10 2024-07-23 getpt(3)
Pages that refer to this page: posix_openpt(3), pts(4)
Copyright and license for this manual page
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HTML rendering created 2025-02-02 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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