272 lines
7.2 KiB
Groff
272 lines
7.2 KiB
Groff
.\" $NetBSD: pkg_delete.1,v 1.31 2003/09/08 08:57:56 wiz Exp $
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.\"
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.\" FreeBSD install - a package for the installation and maintenance
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.\" of non-core utilities.
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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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.\" Jordan K. Hubbard
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.\"
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.\"
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.\" from FreeBSD: @(#)pkg_delete.1
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.\"
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.Dd September 2, 2003
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.Dt PKG_DELETE 1
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.Os
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.Sh NAME
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.Nm pkg_delete
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.Nd a utility for deleting previously installed software package distributions
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.Sh SYNOPSIS
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.Nm
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.Op Fl DdFfnORrVv
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.Bk -words
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.Op Fl K Ar pkg_dbdir
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.Ek
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.Bk -words
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.Op Fl p Ar prefix
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.Ek
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.Ar pkg-name ...
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.Sh DESCRIPTION
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The
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.Nm
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command is used to delete packages that have been previously installed
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with the
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.Xr pkg_add 1
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command.
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.Sh WARNING
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.Bf -emphasis
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Since the
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.Nm
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command may execute scripts or programs provided by a package file,
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your system may be susceptible to ``Trojan horses'' or other subtle
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attacks from miscreants who create dangerous package files.
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.Pp
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You are advised to verify the competence and identity of those who
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provide installable package files.
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For extra protection, examine all the package control files in the
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package record directory
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.Pa ( /var/db/pkg/\*[Lt]pkg-name\*[Gt]/ ) .
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Pay particular
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attention to any +INSTALL, +DEINSTALL, +REQUIRE or +MTREE_DIRS files,
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and inspect the +CONTENTS file for
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.Cm @cwd ,
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.Cm @mode
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(check for setuid),
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.Cm @dirrm ,
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.Cm @exec ,
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and
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.Cm @unexec
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directives, and/or use the
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.Xr pkg_info 1
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command to examine the installed package control files.
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.Ef
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.Sh OPTIONS
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The following command line options are supported:
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.Bl -tag -width indent
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.It Ar pkg-name ...
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The named packages are deinstalled, wildcards can be used, see
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.Xr pkg_info 1 .
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If no version is given, the one currently installed
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will be removed.
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If the
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.Fl F
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flag is given, one or more (absolute) filenames may be specified and
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the Package Database will be consulted for the package to which the
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given file belongs.
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These packages are then deinstalled.
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.It Fl D
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If a deinstallation script exists for a given package, do not execute it.
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.It Fl d
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Remove empty directories created by file cleanup.
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By default, only files/directories explicitly listed in a package's
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contents (either as normal files/directories or with the
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.Cm @dirrm
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directive) will be removed at deinstallation time.
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This option tells
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.Nm
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to also remove any directories that were emptied as a result of removing
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the package.
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.It Fl F
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Any pkg-name given will be interpreted as pathname which is
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subsequently transformed in a (real) package name via the Package
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Database.
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That way, packages can be deleted by giving a filename
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instead of the package-name.
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.It Fl f
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Force removal of the package, even if a dependency is recorded or the
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deinstall or require script fails.
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.It Fl K Ar pkg_dbdir
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Set
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.Ar pkg_dbdir
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as the package database directory.
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If this option isn't specified, then the package database directory is
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taken from the value of the environment variable
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.Ev PKG_DBDIR
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if it's set, otherwise it defaults to
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.Pa /var/db/pkg .
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.It Fl n
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Don't actually deinstall a package, just report the steps that
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would be taken if it were.
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.It Fl O
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Only delete the package's entries from the package database, do not
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touch the package or its files itself.
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.It Fl p Ar prefix
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Set
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.Ar prefix
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as the directory in which to delete files from any installed packages
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which do not explicitly set theirs.
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For most packages, the prefix will
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be set automatically to the installed location by
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.Xr pkg_add 1 .
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.It Fl R
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Like the
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.Fl r
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option, this does a recursive delete.
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The
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.Fl R
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option deletes the given package and any packages required by
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it, unless some other package still needs them.
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This can be used to delete a package and all the packages it needs.
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.It Fl r
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.Nm
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first builds a list of all packages that require (directly and indirectly)
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the one being deleted.
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It then deletes these packages using
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.Nm
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with the given options before deleting the user specified package.
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.It Fl V
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Print version number and exit.
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.It Fl v
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Turn on verbose output.
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.El
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.Sh TECHNICAL DETAILS
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.Nm
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does pretty much what it says.
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It examines installed package records in
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.Pa /var/db/pkg/\*[Lt]pkg-name\*[Gt] ,
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deletes the package contents, and finally removes the package records
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(if an alternate package database directory is specified, then it
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overrides the
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.Pa /var/db/pkg
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path shown above).
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.Pp
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If a package is required by other installed packages,
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.Nm
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will list those dependent packages and refuse to delete the package
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(unless the
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.Fl f
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option is given).
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.Pp
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If a package has been marked as a
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.Cm preserved
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package, it will not be able to be deleted
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(unless more than one occurrence of the
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.Fl f
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option is given).
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.Pp
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If a filename is given instead of a package name, the package of which
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the given file belongs to can be deleted if the
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.Fl F
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Flag is given.
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The filename needs to be absolute, see the output produced by the pkg_info
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.Fl aF
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command.
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.Pp
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If the package contains a
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.Ar require
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file (see
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.Xr pkg_create 1 ) ,
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then this is executed first as
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.Bd -filled -offset indent -compact
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.Cm require
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.Ar \*[Lt]pkg-name\*[Gt]
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.Ar DEINSTALL
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.Ed
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(where
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.Ar pkg-name
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is the name of the package in question and
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.Ar DEINSTALL
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is a keyword denoting that this is a deinstallation)
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to see whether or not deinstallation should continue.
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A non-zero exit status means no, unless the
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.Fl f
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option is specified.
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.Pp
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If a
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.Cm deinstall
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script exists for the package, it is executed before and after
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any files are removed.
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It is this script's responsibility to clean up any additional messy details
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around the package's installation, since all
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.Nm
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knows how to do is delete the files created in the original distribution.
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The
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.Ic deinstall
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script is called as:
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.Bd -filled -offset indent -compact
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.Cm deinstall
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.Ar \*[Lt]pkg-name\*[Gt]
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.Ar VIEW-DEINSTALL
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.Ed
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before removing the package from a view, and as:
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.Bd -filled -offset indent -compact
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.Cm deinstall
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.Ar \*[Lt]pkg-name\*[Gt]
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.Ar DEINSTALL
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.Ed
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before deleting all files and as:
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.Bd -filled -offset indent -compact
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.Cm deinstall
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.Ar \*[Lt]pkg-name\*[Gt]
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.Ar POST-DEINSTALL
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.Ed
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after deleting them.
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Passing the keywords
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.Ar VIEW-DEINSTALL ,
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.Ar DEINSTALL
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and
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.Ar POST-DEINSTALL
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lets you potentially write only one program/script that handles all
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aspects of installation and deletion.
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.Pp
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All scripts are called with the environment variable
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.Ev PKG_PREFIX
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set to the installation prefix (see the
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.Fl p
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option above).
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This allows a package author to write a script
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that reliably performs some action on the directory where the package
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is installed, even if the user might have changed it by specifying the
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.Fl p
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option when running
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.Nm
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or
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.Xr pkg_add 1 .
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.Sh SEE ALSO
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.Xr pkg_add 1 ,
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.Xr pkg_admin 1 ,
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.Xr pkg_create 1 ,
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.Xr pkg_info 1 ,
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.Xr mktemp 3 ,
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.Xr packages 7 ,
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.Xr mtree 8
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.Sh AUTHORS
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.Bl -tag -width indent -compact
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.It "Jordan Hubbard"
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most of the work
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.It "John Kohl"
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refined it for
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.Nx
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.It "Hubert Feyrer"
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.Nx
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wildcard dependency processing, pkgdb, recursive "down"
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delete, etc.
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.El
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