1.\" -*- nroff -*- 2.\" 3.\" Copyright (c) 1996 Doug Rabson 4.\" 5.\" All rights reserved. 6.\" 7.\" This program is free software. 8.\" 9.\" Redistribution and use in source and binary forms, with or without 10.\" modification, are permitted provided that the following conditions 11.\" are met: 12.\" 1. Redistributions of source code must retain the above copyright 13.\" notice, this list of conditions and the following disclaimer. 14.\" 2. Redistributions in binary form must reproduce the above copyright 15.\" notice, this list of conditions and the following disclaimer in the 16.\" documentation and/or other materials provided with the distribution. 17.\" 18.\" THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY EXPRESS OR 19.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21.\" IN NO EVENT SHALL THE DEVELOPERS BE LIABLE FOR ANY DIRECT, INDIRECT, 22.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28.\" 29.Dd December 31, 2020 30.Dt VOP_PATHCONF 9 31.Os 32.Sh NAME 33.Nm VOP_PATHCONF 34.Nd return POSIX pathconf information 35.Sh SYNOPSIS 36.In sys/param.h 37.In sys/vnode.h 38.In sys/unistd.h 39.Ft int 40.Fn VOP_PATHCONF "struct vnode *vp" "int name" "long *retval" 41.Sh DESCRIPTION 42The arguments are: 43.Bl -tag -width retval 44.It Fa vp 45The vnode to get information about. 46.It Fa name 47The type of information to return. 48.It Fa retval 49The place to return the information. 50.El 51.Pp 52The value of 53.Fa name 54specifies what should be returned: 55.Bl -tag -width _PC_CHOWN_RESTRICTED 56.It Dv _PC_LINK_MAX 57The maximum number of links to a file. 58.It Dv _PC_NAME_MAX 59The maximum number of bytes in a file name. 60.It Dv _PC_PATH_MAX 61The maximum number of bytes in a pathname. 62.It Dv _PC_PIPE_BUF 63The maximum number of bytes which will be written atomically to a pipe. 64.It Dv _PC_CHOWN_RESTRICTED 65Return 1 if appropriate privileges are required for the 66.Xr chown 2 67system call, otherwise 0. 68.It Dv _PC_NO_TRUNC 69Return 1 if file names longer than 70.Dv KERN_NAME_MAX 71are truncated. 72.El 73.Sh LOCKS 74The vnode will be locked on entry and should remain locked on return. 75.Sh RETURN VALUES 76If 77.Fa name 78is recognized, 79.Fa *retval 80is set to the specified value and zero is returned, otherwise 81.Er EINVAL 82is returned. 83.Sh SEE ALSO 84.Xr pathconf 2 , 85.Xr vnode 9 86.Sh AUTHORS 87This manual page was written by 88.An Doug Rabson . 89