trusty (3) getpt.3.gz

Provided by: manpages-dev_3.54-1ubuntu1_all bug

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.


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 3.54 of the Linux man-pages project.  A description of the project, and
       information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.