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
   Multithreading (see pthreads(7))
       The getpt() function is thread-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 3.74 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
       http://www.kernel.org/doc/man-pages/.

GNU                               2014-04-01                          GETPT(3)

Czas wygenerowania: 0.00050 sek.

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Some optimisations by Eli Argon
Caching idea and code contribution by James Richardson

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