NAME

grantpt − grant access to the slave pseudo-terminal device

SYNOPSIS

int grantpt(int fildes);

DESCRIPTION

The function grantpt() changes the mode and ownership of the slave pseudo-terminal device associated with its master pseudo-terminal counter part.  fildes is the file descriptor returned from a successful open of the master pseudo-terminal device.  A setuid() root program (see setuid(2)) is invoked to change the permissions.  The user ID of the slave is set to the effective owner of the calling process and the group ID is set to a reserved group.  The permission mode of the slave pseudo-terminal is set to readable, writeable by the owner and writeable by the group. 

RETURN VALUES

Upon successful completion, the function grantpt() returns 0; otherwise it returns -1.  Failure could occur if fildes is not an open file descriptor, if fildes is not associated with a master pseudo-terminal device, or if the corresponding slave device could not be accessed. 

SEE ALSO

open(2), setuid(2), ptsname(3C), unlockpt(3C)

SunOS 5.1 STREAMS Programmer’s Guide

SunOS 5.1/x86  —  Last change: 13 Jul 1990