1*2fe8fb19SBen Gras.\" $NetBSD: grantpt.3,v 1.4 2008/04/30 13:10:51 martin Exp $ 2*2fe8fb19SBen Gras.\" 3*2fe8fb19SBen Gras.\" Copyright (c) 2004 The NetBSD Foundation, Inc. 4*2fe8fb19SBen Gras.\" All rights reserved. 5*2fe8fb19SBen Gras.\" 6*2fe8fb19SBen Gras.\" This code is derived from software contributed to The NetBSD Foundation 7*2fe8fb19SBen Gras.\" by Christos Zoulas. 8*2fe8fb19SBen Gras.\" 9*2fe8fb19SBen Gras.\" Redistribution and use in source and binary forms, with or without 10*2fe8fb19SBen Gras.\" modification, are permitted provided that the following conditions 11*2fe8fb19SBen Gras.\" are met: 12*2fe8fb19SBen Gras.\" 1. Redistributions of source code must retain the above copyright 13*2fe8fb19SBen Gras.\" notice, this list of conditions and the following disclaimer. 14*2fe8fb19SBen Gras.\" 2. Redistributions in binary form must reproduce the above copyright 15*2fe8fb19SBen Gras.\" notice, this list of conditions and the following disclaimer in the 16*2fe8fb19SBen Gras.\" documentation and/or other materials provided with the distribution. 17*2fe8fb19SBen Gras.\" 18*2fe8fb19SBen Gras.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 19*2fe8fb19SBen Gras.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 20*2fe8fb19SBen Gras.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 21*2fe8fb19SBen Gras.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 22*2fe8fb19SBen Gras.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23*2fe8fb19SBen Gras.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24*2fe8fb19SBen Gras.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25*2fe8fb19SBen Gras.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26*2fe8fb19SBen Gras.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27*2fe8fb19SBen Gras.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28*2fe8fb19SBen Gras.\" POSSIBILITY OF SUCH DAMAGE. 29*2fe8fb19SBen Gras.\" 30*2fe8fb19SBen Gras.Dd May 25, 2004 31*2fe8fb19SBen Gras.Dt GRANTPT 3 32*2fe8fb19SBen Gras.Os 33*2fe8fb19SBen Gras.Sh NAME 34*2fe8fb19SBen Gras.Nm grantpt 35*2fe8fb19SBen Gras.Nd grant access to a slave pseudo-terminal device 36*2fe8fb19SBen Gras.Sh LIBRARY 37*2fe8fb19SBen Gras.Lb libc 38*2fe8fb19SBen Gras.Sh SYNOPSIS 39*2fe8fb19SBen Gras.In stdlib.h 40*2fe8fb19SBen Gras.Ft int 41*2fe8fb19SBen Gras.Fn grantpt "int fildes" 42*2fe8fb19SBen Gras.Sh DESCRIPTION 43*2fe8fb19SBen GrasThe 44*2fe8fb19SBen Gras.Fn grantpt 45*2fe8fb19SBen Grasfunction changes the mode and ownership of the slave pseudo-terminal device 46*2fe8fb19SBen Grasthat corresponds to the master pseudo-terminal device associated with 47*2fe8fb19SBen Gras.Fa fildes 48*2fe8fb19SBen Grasto be owned by the real user id of the calling process, group id of 49*2fe8fb19SBen Gras.Dv tty . 50*2fe8fb19SBen GrasThe permissions are set to readable and writable by owner, and writable by 51*2fe8fb19SBen Grasgroup. 52*2fe8fb19SBen GrasIf the slave pseudo-terminal device was being accessed by other file 53*2fe8fb19SBen Grasdescriptors at the time, all such access will be revoked. 54*2fe8fb19SBen Gras.Sh RETURN VALUES 55*2fe8fb19SBen GrasIf successful, 56*2fe8fb19SBen Gras.Fn grantpt 57*2fe8fb19SBen Grasreturns 0; otherwise a value of \-1 is returned and 58*2fe8fb19SBen Gras.Va errno 59*2fe8fb19SBen Grasis set to indicate the error. 60*2fe8fb19SBen Gras.Sh ERRORS 61*2fe8fb19SBen GrasThe 62*2fe8fb19SBen Gras.Fn grantpt 63*2fe8fb19SBen Grasfunction will fail if: 64*2fe8fb19SBen Gras.Bl -tag -width Er 65*2fe8fb19SBen Gras.It Bq Er EACCESS 66*2fe8fb19SBen Grasthe corresponding pseudo-terminal device could not be accessed. 67*2fe8fb19SBen Gras.It Bq Er EBADF 68*2fe8fb19SBen Gras.Fa fildes 69*2fe8fb19SBen Grasis not a valid descriptor. 70*2fe8fb19SBen Gras.It Bq Er EINVAL 71*2fe8fb19SBen Gras.Fa fildes 72*2fe8fb19SBen Grasis not associated with a master pseudo-terminal device. 73*2fe8fb19SBen Gras.El 74*2fe8fb19SBen Gras.Sh NOTES 75*2fe8fb19SBen GrasSetting the group to 76*2fe8fb19SBen Gras.Dv tty 77*2fe8fb19SBen Grasand revoking accesses by other file descriptors are 78*2fe8fb19SBen Gras.Nx 79*2fe8fb19SBen Grasextensions. 80*2fe8fb19SBen GrasCalling 81*2fe8fb19SBen Gras.Fn grantpt 82*2fe8fb19SBen Grasis equivalent to: 83*2fe8fb19SBen Gras.Bd -literal 84*2fe8fb19SBen Gras ioctl(fildes, TIOCGRANTPT, 0); 85*2fe8fb19SBen Gras.Ed 86*2fe8fb19SBen Gras.Sh SEE ALSO 87*2fe8fb19SBen Gras.Xr ioctl 2 , 88*2fe8fb19SBen Gras.Xr posix_openpt 3 , 89*2fe8fb19SBen Gras.Xr ptsname 3 , 90*2fe8fb19SBen Gras.Xr unlockpt 3 91*2fe8fb19SBen Gras.Sh STANDARDS 92*2fe8fb19SBen GrasThe 93*2fe8fb19SBen Gras.Fn grantpt 94*2fe8fb19SBen Grasfunction conforms to 95*2fe8fb19SBen Gras.St -p1003.1-2001 . 96*2fe8fb19SBen GrasIts first release was in 97*2fe8fb19SBen Gras.St -xpg4.2 . 98