23ff3dbeb8
years by the priv_check(9) interface and just very few places are left. Note that compatibility stub with older FreeBSD version (all above the 8 limit though) are left in order to reduce diffs against old versions. It is responsibility of the maintainers for any module, if they think it is the case, to axe out such cases. This patch breaks KPI so __FreeBSD_version will be bumped into a later commit. This patch needs to be credited 50-50 with rwatson@ as he found time to explain me how the priv_check() works in detail and to review patches. Tested by: Giovanni Trematerra <giovanni dot trematerra at gmail dot com> Reviewed by: rwatson
73 lines
2.3 KiB
Groff
73 lines
2.3 KiB
Groff
.\"
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.\" Copyright (c) 2004 Alfred Perlstein
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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.\" BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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.\" LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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.\" AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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.\" OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd April 2, 2004
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.Dt VFS_SUSER 9
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.Os
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.Sh NAME
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.Nm vfs_suser
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.Nd check if credentials have superuser privileges for a mount point
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.Sh SYNOPSIS
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.In sys/param.h
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.In sys/systm.h
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.In sys/mount.h
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.Ft int
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.Fn vfs_suser "struct mount *mp" "struct thread *td"
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.Sh DESCRIPTION
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The
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.Fn vfs_suser
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function checks if the credentials given include superuser powers
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for the given mount point.
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It will check to see if the thread
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passed in has the same credentials as the user that mounted the
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file system.
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If so, it returns 0, otherwise it returns what
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.Xr priv_check 9
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would have returned.
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.Sh RETURN VALUES
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The
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.Fn vfs_suser
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function returns 0 if the user has superuser powers and
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.Er EPERM
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otherwise.
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This is the
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.Em reverse logic
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of some other implementations of
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.Fn suser
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in which a TRUE response indicates superuser powers.
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.Sh SEE ALSO
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.Xr chroot 2 ,
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.Xr jail 2
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.Sh HISTORY
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The
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.Fn vfs_suser
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function was introduced in
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.Fx 5.2 .
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.Sh AUTHORS
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This manual page was written by
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.An Alfred Perlstein .
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