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 .

IEEE/The Open Group                                   2003                                            GRANTPT(P)