osf1 man page for grantpt

grantpt(3)						     Library Functions Manual							grantpt(3)

NAME
       grantpt - Permits access to the slave pseudoterminal device

LIBRARY
       Standard C Library (libc.so, libc.a)

SYNOPSIS
       #include <stdlib.h>

       int grantpt(	 int fildes);

STANDARDS
       Interfaces documented on this reference page conform to industry standards as follows:

       grantpt():  XPG4-UNIX

       Refer to the standards(5) reference page for more information about industry standards and associated tags.

PARAMETERS
       Specifies a file descriptor that is returned from a successful open of a master pseudoterminal device.

DESCRIPTION
       The  grantpt()  function modifies the ownership and mode of the slave pseudoterminal device associated with its master pseudoterminal coun-
       terpart.

       The modifications of mode and ownership are performed as follows: The group ID is set to a reserved group.  The slave user ID is set to the
       real  UID  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 VALUES
       Upon successful completion, the grantpt() function returns a value of 0 (zero). Otherwise, it returns a value of -1 and sets errno to indi-
       cate the error.

ERRORS
       The grantpt() function sets errno to the specified values for the following conditions:

       The corresponding slave device cannot be accessed.  The file descriptor specified by the fildes parameter is not a valid open file descrip-
       tor.  The file descriptor specified by the fildes parameter is not associated with a master device.

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

       Applications calling grantpt() may get a SIGCHLD signal from processes that they did not explicitly create.

RELATED INFORMATION
       Functions: open(2), ptsname(3), setuid(2), unlockpt(3)

       Standards: standards(5) delim off

																	grantpt(3)