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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

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