Man Unlockpt en anglais
UNLOCKPT(3)                Linux Programmer's Manual               UNLOCKPT(3)



 

NAME


       unlockpt - unlock a pseudo-terminal master/slave pair

 

SYNOPSIS


       #define _XOPEN_SOURCE
       #include 

       int unlockpt(int fd);

 

DESCRIPTION






       The  unlockpt() function unlocks the slave pseudo-terminal device (pty)
       corresponding to the master pty referred to by fd.

       unlockpt() should be called before opening the slave side of a pty.

 

RETURN VALUE


       When successful, unlockpt() returns 0.  Otherwise, it  returns  -1  and
       sets errno appropriately.

 

ERRORS


       EBADF  The fd argument is not a file descriptor open for writing.

       EINVAL The fd argument is not associated with a master pty.

 

VERSIONS


       unlockpt() is provided in glibc since version 2.1.

 

CONFORMING TO


       POSIX.1-2001.

 

SEE ALSO


       grantpt(3),      posix_openpt(3),      ptsname(3),     pts(4),     fea-
       ture_test_macros(7), pty(7)

 

COLOPHON


       This page is part of release 3.05 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/.



                                  2008-06-14                       UNLOCKPT(3)