99 lines
4.0 KiB
Groff
99 lines
4.0 KiB
Groff
.\"$Id: grpck.8,v 1.13 2004/08/09 17:39:42 kloczek Exp $
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.\" Copyright 1992 - 1993, Julianne Frances Haugh
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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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.\" 3. Neither the name of Julianne F. Haugh nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY JULIE HAUGH AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL JULIE HAUGH OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, 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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.TH GRPCK 8
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.SH NAME
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grpck \- verify integrity of group files
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.SH SYNOPSIS
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\fBgrpck\fR [\fB-r\fR] [\fIgroup\fR \fIshadow\fR]
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.SH DESCRIPTION
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\fBgrpck\fR verifies the integrity of the system authentication information.
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All entries in the \fI/etc/group\fR and \fI/etc/gshadow\fR are checked to
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see that the entry has the proper format and valid data in each field. The
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user is prompted to delete entries that are improperly formatted or which
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have other incorrectable errors.
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.PP
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Checks are made to verify that each entry has:
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.sp
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.in +.5i
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- the correct number of fields
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.br
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- a unique group name
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.br
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- a valid list of members and administrators
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.in -.5i
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.sp
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.PP
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The checks for correct number of fields and unique group name are fatal. If
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the entry has the wrong number of fields, the user will be prompted to
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delete the entire line. If the user does not answer affirmatively, all
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further checks are bypassed. An entry with a duplicated group name is
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prompted for deletion, but the remaining checks will still be made. All
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other errors are warnings and the user is encouraged to run the
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\fBgroupmod\fR command to correct the error.
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.PP
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The commands which operate on the \fI/etc/group\fR file are not able to
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alter corrupted or duplicated entries. \fBgrpck\fR should be used in those
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circumstances to remove the offending entry.
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.SH OPTIONS
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By default, \fBgrpck\fR operates on the files \fI/etc/group\fR and
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\fI/etc/gshadow\fR. The user may select alternate files with the \fIgroup\fR
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and \fIshadow\fR parameters. Additionally, the user may execute the command
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in read-only mode by specifying the \fB-r\fR flag. This causes all questions
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regarding changes to be answered \fBno\fR without user intervention.
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\fBgrpck\fR can also sort entries in \fI/etc/group\fR and \fI/etc/gshadow\fR
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by GID. To run it in sort mode pass it \fB-s\fR flag. No checks are
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performed then, it just sorts.
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.SH FILES
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\fI/etc/group\fR \ - group account information
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.br
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\fI/etc/gshadow\fR \ - encrypted passwords and group administrator information
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.br
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\fI/etc/passwd\fR \ - user information
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.SH SEE ALSO
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.BR group (5),
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.BR passwd (5),
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.BR shadow (5),
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.BR groupmod (8)
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.SH EXIT VALUES
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.TP 2
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The \fBgrpck\fR command exits with the following values:
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.br
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\fB0\fR \- success
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.br
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\fB1\fR \- syntax Error
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.br
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\fB2\fR \- one or more bad group entries
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.br
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\fB3\fR \- can't open group files
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.br
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\fB4\fR \- can't lock group files
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.br
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\fB5\fR \- can't update group files
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.SH AUTHOR
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Julianne Frances Haugh (jockgrrl@ix.netcom.com)
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