87 lines
2.5 KiB
Groff
87 lines
2.5 KiB
Groff
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.\" Access Control Lists manual pages
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.\"
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.\" (C) 2002 Andreas Gruenbacher, <andreas.gruenbacher@gmail.com>
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.\"
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.\" This is free documentation; you can redistribute it and/or
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.\" modify it under the terms of the GNU General Public License as
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.\" published by the Free Software Foundation; either version 2 of
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.\" the License, or (at your option) any later version.
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.\"
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.\" The GNU General Public License's references to "object code"
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.\" and "executables" are to be interpreted as the output of any
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.\" document formatting or typesetting system, including
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.\" intermediate and printed output.
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.\"
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.\" This manual is distributed in the hope that it will be useful,
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.\" but WITHOUT ANY WARRANTY; without even the implied warranty of
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.\" MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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.\" GNU General Public License for more details.
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.\"
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.\" You should have received a copy of the GNU General Public
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.\" License along with this manual. If not, see
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.\" <http://www.gnu.org/licenses/>.
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.\"
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.Dd March 23, 2002
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.Dt ACL_VALID 3
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.Os "Linux ACL"
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.Sh NAME
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.Nm acl_valid
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.Nd validate an ACL
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.Sh LIBRARY
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Linux Access Control Lists library (libacl, \-lacl).
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.Sh SYNOPSIS
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.In sys/types.h
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.In sys/acl.h
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.Ft int
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.Fn acl_valid "acl_t acl"
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.Sh DESCRIPTION
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The
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.Fn acl_valid
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function checks the ACL referred to by the argument
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.Va acl
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for validity.
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.Pp
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The three required entries ACL_USER_OBJ, ACL_GROUP_OBJ, and ACL_OTHER
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must exist exactly once in the ACL. If the ACL contains any ACL_USER or
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ACL_GROUP entries, then an ACL_MASK entry is also required. The ACL
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may contain at most one ACL_MASK entry.
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.Pp
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The user identifiers must be unique among all entries of type ACL_USER.
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The group identifiers must be unique among all entries of type ACL_GROUP.
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.Sh RETURN VALUE
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.Rv -std acl_valid
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.Sh ERRORS
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If any of the following conditions occur, the
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.Fn acl_valid
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function returns
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.Li -1
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and sets
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.Va errno
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to the corresponding value:
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.Bl -tag -width Er
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.It Bq Er EINVAL
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The argument
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.Va acl
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is not a valid pointer to an ACL.
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.Pp
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The argument
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.Va acl
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does not point to a valid ACL.
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.Pp
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One or more of the required ACL entries is not present in
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.Va acl .
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.Pp
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The ACL contains entries that are not unique.
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.El
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.Sh STANDARDS
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IEEE Std 1003.1e draft 17 (\(lqPOSIX.1e\(rq, abandoned)
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.Sh SEE ALSO
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.Xr acl_check 3 ,
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.Xr acl_set_file 3 ,
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.Xr acl 5
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.Sh AUTHOR
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Derived from the FreeBSD manual pages written by
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.An "Robert N M Watson" Aq rwatson@FreeBSD.org ,
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and adapted for Linux by
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.An "Andreas Gruenbacher" Aq andreas.gruenbacher@gmail.com .
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