NAME

       grantpt - grant access to the slave pseudo-terminal device

SYNOPSIS

       #include <stdlib.h>

       int grantpt(int fildes);

DESCRIPTION

       The  grantpt()  function  shall change the mode and ownership of the slave pseudo-terminal
       device associated with its master pseudo-terminal counterpart. The fildes  argument  is  a
       file  descriptor  that refers to a master pseudo-terminal device. The user ID of the slave
       shall be set to the real UID of the calling process and the group ID shall be  set  to  an
       unspecified  group  ID.   The permission mode of the slave pseudo-terminal shall be set to
       readable and writable by the owner, and writable by the group.

       The behavior of the grantpt() function is unspecified if the application has  installed  a
       signal handler to catch SIGCHLD signals.

RETURN VALUE

       Upon  successful  completion,  grantpt() shall return 0; otherwise, it shall return -1 and
       set errno to indicate the error.

ERRORS

       The grantpt() function may fail if:

       EBADF  The fildes argument is not a valid open file descriptor.

       EINVAL The fildes argument is not associated with a master pseudo-terminal device.

       EACCES The corresponding slave pseudo-terminal device could not be accessed.

       The following sections are informative.

EXAMPLES

       None.

APPLICATION USAGE

       None.

RATIONALE

       None.

FUTURE DIRECTIONS

       None.

SEE ALSO

       open() , ptsname() , unlockpt() , the Base  Definitions  volume  of  IEEE Std 1003.1-2001,
       <stdlib.h>

COPYRIGHT

       Portions  of  this  text  are  reprinted  and  reproduced in electronic form from IEEE Std
       1003.1, 2003 Edition, Standard for Information Technology  --  Portable  Operating  System
       Interface  (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 by
       the Institute of Electrical and Electronics Engineers, Inc and  The  Open  Group.  In  the
       event  of  any  discrepancy  between this version and the original IEEE and The Open Group
       Standard, the original IEEE and The Open Group  Standard  is  the  referee  document.  The
       original Standard can be obtained online at http://www.opengroup.org/unix/online.html .