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-.\"
-.\" FreeBSD install - a package for the installation and maintainance
-.\" of non-core utilities.
-.\"
-.\" Redistribution and use in source and binary forms, with or without
-.\" modification, are permitted provided that the following conditions
-.\" are met:
-.\" 1. Redistributions of source code must retain the above copyright
-.\"    notice, this list of conditions and the following disclaimer.
-.\" 2. Redistributions in binary form must reproduce the above copyright
-.\"    notice, this list of conditions and the following disclaimer in the
-.\"    documentation and/or other materials provided with the distribution.
-.\"
-.\" Jordan K. Hubbard
-.\"
-.\"
-.\"     @(#)pkg_delete.1
-.\" $FreeBSD$
-.\"
-.Dd May 30, 2008
-.Dt PKG_DELETE 1
-.Os
-.Sh NAME
-.Nm pkg_delete
-.Nd a utility for deleting previously installed software package distributions
-.Sh SYNOPSIS
-.Nm
-.Op Fl dDfGinrvxX
-.Op Fl p Ar prefix
-.Ar pkg-name ...
-.Nm
-.Fl a
-.Op Ar flags
-.Sh DESCRIPTION
-The
-.Nm
-command is used to delete packages that have been previously installed
-with the
-.Xr pkg_add 1
-command.
-.Sh WARNING
-.Bf -emphasis
-Since the
-.Nm
-command may execute scripts or programs provided by a package file,
-your system may be susceptible to
-.Dq Em trojan horses
-or other subtle
-attacks from miscreants who create dangerous package files.
-.Pp
-You are advised to verify the competence and identity of those who
-provide installable package files.
-For extra protection, examine all
-the package control files in the package record directory
-.Pa ( /var/db/pkg/<pkg-name>/ ) .
-Pay particular attention to any +INSTALL, +POST-INSTALL, +DEINSTALL,
-+POST-DEINSTALL, +REQUIRE or +MTREE_DIRS files, and inspect the +CONTENTS
-file for
-.Cm @cwd ,
-.Cm @mode
-(check for setuid),
-.Cm @dirrm ,
-.Cm @exec ,
-and
-.Cm @unexec
-directives, and/or use the
-.Xr pkg_info 1
-command to examine the installed package control files.
-.Ef
-.Sh OPTIONS
-The following command line options are supported:
-.Bl -tag -width indent
-.It Ar pkg-name ...
-The named packages are deinstalled.
-.It Fl a , -all
-Unconditionally delete all currently installed packages.
-.It Fl i , -interactive
-Request confirmation before attempting to delete each package,
-regardless whether or not the standard input device is a
-terminal.
-.It Fl v , -verbose
-Turn on verbose output.
-.It Fl D , -no-script , -no-scripts
-If a deinstallation script exists for a given package, do not execute it.
-.It Fl n , -dry-run
-Do not actually deinstall a package, just report the steps that
-would be taken if it were.
-.It Fl p , -prefix Ar prefix
-Set
-.Ar prefix
-as the directory in which to delete files from any installed packages
-which do not explicitly set theirs.
-For most packages, the prefix will
-be set automatically to the installed location by
-.Xr pkg_add 1 .
-.It Fl d , -clean-dirs
-Remove empty directories created by file cleanup.
-By default, only
-files/directories explicitly listed in a package's contents (either as
-normal files/directories or with the
-.Cm @dirrm
-directive) will be removed at deinstallation time.
-This option tells
-.Nm
-to also remove any directories that were emptied as a result of removing
-the package.
-.It Fl f , -force
-Force removal of the package, even if a dependency is recorded or the
-deinstall or require script fails.
-.It Fl G , -no-glob
-Do not try to expand shell glob patterns in the
-.Ar pkg-name
-when selecting packages to be deleted (by default
-.Nm
-automatically expands shell glob patterns in the
-.Ar pkg-name ) .
-.It Fl x , -regex
-Treat the
-.Ar pkg-name
-as a regular expression and delete all packages whose names match
-that regular expression.
-Multiple regular expressions could be
-provided, in that case
-.Nm
-deletes all packages that match at least one
-regular expression from the list.
-.It Fl X , -extended
-Like
-.Fl x ,
-but treats the
-.Ar pkg-name
-as an extended regular expression.
-.It Fl r , -recursive
-Recursive removal.
-In addition to specified packages, delete all
-packages that depend on those packages as well.
-.El
-.Sh TECHNICAL DETAILS
-The
-.Nm
-utility
-does pretty much what it says.
-It examines installed package records in
-.Pa /var/db/pkg/<pkg-name> ,
-deletes the package contents, and finally removes the package records.
-If the environment variable
-.Ev PKG_DBDIR
-is set, this overrides the
-.Pa /var/db/pkg/
-path shown above.
-.Pp
-If a package is required by other installed packages,
-.Nm
-will list those dependent packages and refuse to delete the package
-(unless the
-.Fl f
-option is given).
-.Pp
-If the package contains a
-.Ar require
-file (see
-.Xr pkg_create 1 ) ,
-then this is executed first as
-.Bd -ragged -offset indent -compact
-.Cm require
-.Ar <pkg-name>
-.Ar DEINSTALL
-.Ed
-(where
-.Ar pkg-name
-is the name of the package in question and
-.Ar DEINSTALL
-is a keyword denoting that this is a deinstallation)
-to see whether or not deinstallation should continue.
-A non-zero exit
-status means no, unless the
-.Fl f
-option is specified.
-.Pp
-If a
-.Cm deinstall
-script exists for the package, it is executed before any files are removed.
-It is this script's responsibility to clean up any additional messy details
-around the package's installation, since all
-.Nm
-knows how to do is delete the files created in the original distribution.
-The
-.Nm deinstall
-script is called as:
-.Bd -ragged -offset indent -compact
-.Cm script
-.Ar <pkg-name>
-.Ar DEINSTALL
-.Ed
-where
-.Ar pkg-name
-is the name of the package in question and
-.Ar DEINSTALL
-is a keyword denoting this as the pre-deinstallation phase.
-.Pp
-.Sy Note :
-The
-.Ar DEINSTALL
-keyword will not appear if separate scripts for deinstall and post-deinstall
-are given during package creation time (using the
-.Fl k
-and
-.Fl K
-flags to
-.Xr pkg_create 1 ) .
-.Pp
-If a
-.Cm post-deinstall
-script exists for the package, it is executed
-.Cm after
-all files are removed.
-It is this script's responsibility to clean up any
-additional messy details around the package's installation, and leave the
-system (hopefully) in the same state that it was prior to the installation
-of the package.
-.Pp
-The
-.Nm post-deinstall
-script is called as:
-.Bd -ragged -offset indent -compact
-.Cm script
-.Ar <pkg-name>
-.Ar POST-DEINSTALL
-.Ed
-where
-.Ar pkg-name
-is the name of the package in question and
-.Ar POST-DEINSTALL
-is a keyword denoting this as the post-deinstallation phase.
-.Pp
-.Sy Note :
-The
-.Ar POST-DEINSTALL
-keyword will not appear if separate scripts for deinstall and post-deinstall
-are given during package creation time (using the
-.Fl k
-and
-.Fl K
-flags to
-.Xr pkg_create 1 ) .
-.Pp
-Reasoning behind passing keywords such as
-.Ar DEINSTALL
-and
-.Ar POST-DEINSTALL
-is that it lets you potentially write only one program/script that handles
-all aspects of installation and deletion.
-.Pp
-But experience has proved that this is a lot more difficult to maintain and
-is not as advantageous as having separate scripts that handle each aspect of
-installation and deinstallation.
-.Pp
-All scripts are called with the environment variable
-.Ev PKG_PREFIX
-set to the installation prefix (see the
-.Fl p
-option above).
-This allows a package author to write a script
-that reliably performs some action on the directory where the package
-is installed, even if the user might have changed it by specifying the
-.Fl p
-option when running
-.Nm
-or
-.Cm pkg_add .
-.Sh ENVIRONMENT
-The environment variable
-.Ev PKG_DBDIR
-specifies an alternative location for the installed package database.
-.Sh FILES
-.Bl -tag -width /var/db/pkg -compact
-.It Pa /var/db/pkg
-Default location of the installed package database.
-.El
-.Sh SEE ALSO
-.Xr pkg_add 1 ,
-.Xr pkg_create 1 ,
-.Xr pkg_info 1 ,
-.Xr pkg_version 1 ,
-.Xr mktemp 3 ,
-.Xr mtree 8
-.Sh AUTHORS
-.An Jordan Hubbard
-.Sh CONTRIBUTORS
-.An John Kohl Aq jtk@rational.com ,
-.An Oliver Eikemeier Aq eik@FreeBSD.org
-.Sh BUGS
-Sure to be some.