hpux man page for grantpt

grantpt(3C)															       grantpt(3C)

NAME
       grantpt - grant access to the STREAMS slave pty

SYNOPSIS
DESCRIPTION
       The  passed  parameter,	fildes,  is  a	file  descriptor that is returned from a successful open of a STREAMS master pty (pseudo-terminal)
       device. The function modifies the ownership and mode of the slave pty device special file associated with its master pty counterpart.

       A root program is spawned to change ownership and mode of the pty slave device file in the following way: The group ID is set to a reserved
       group named "tty".  The slave user ID is set to the effective owner of the calling process.  The permissions of the slave device are set so
       that the owner is allowed read and write access and the group is allowed write access.

RETURN VALUE
       Upon successful completion, the function returns a value of 0 (zero).  Otherwise, it returns a value of -1.

       Failure may result under the following conditions:

	      o  The file descriptor specified by the fildes parameter is not an open file descriptor.

	      o  The file descriptor specified by the fildes parameter is not associated with a STREAMS master pty device.

	      o  The corresponding slave pty device cannot be accessed.

WARNINGS
       The function may also fail if the application has installed a signal handler to catch the SIGCHLD (death of a child) signal.

EXAMPLES
       The following example shows how is typically used.

		 ...

AUTHOR
       was developed by HP and OSF.

SEE ALSO
       open(2), unlockpt(3C), ptsname(3C), ptm(7), pts(7), ptem(7), ldterm(7).

																       grantpt(3C)