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NAME

       getpt - open the pseudo-terminal master (PTM)

SYNOPSIS

       #define _GNU_SOURCE
       #include <stdlib.h>

       int getpt(void);

DESCRIPTION

       getpt() opens a pseudo-terminal master and returns its file descriptor.
       It is equivalent to

           open(/dev/ptmx, O_RDWR | O_NOCTTY);

       on  Linux  systems,  though  the  pseudo-terminal  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.

CONFORMING TO

       getpt() is specific to GNU Libc.

SEE ALSO

       grantpt(3), ptsname(3), posix_openpt(3), unlockpt(3), ptmx(4), pty(7)

COLOPHON

       This page is part of release 2.77 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/.