.\" $OpenBSD: pkg_delete.1,v 1.2 1996/10/08 01:21:02 michaels Exp $ .\" .\" 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 .\" .Dd November 25, 1994 .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 vDdnf .Op Fl p Ar prefix .Ar pkg-name ... .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 ``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// ). Pay particular attention to any +INSTALL, +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 v Turns on verbose output. .Em "Optional." .It Fl D If a deinstallation script exists for a given package, do not execute it. .Em "Optional." .It Fl n Don't actually deinstall a package, just report the steps that would be taken if it were. .Em "Optional." .It Fl p Ar prefix Sets .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 . .Em "Optional." .It Fl d 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. .Em "Optional." .It Fl f Force removal of the package, even if a dependency is recorded or the deinstall or require script fails. .Em "Optional." .El .Pp .Sh TECHNICAL DETAILS .Nm does pretty much what it says. It examines installed package records in .Pa /var/db/pkg/ , deletes the package contents, and finally removes the package records. .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 -filled -offset indent -compact .Cm require .Ar .Ar DEINSTALL .Ed (where .Ar pkg-name is the name of the package in question and .I 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 -filled -offset indent -compact .Cm deinstall .Ar .Ar DEINSTALL .Ed Passing the keyword .Ar DEINSTALL lets you potentially write only one program/script that handles all aspects of installation and deletion. .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 SEE ALSO .Xr pkg_add 1 , .Xr pkg_create 1 , .Xr pkg_info 1 , .Xr mktemp 3 , .Xr mtree 8 . .Sh AUTHORS .Bl -tag -width indent -compact .It "Jordan Hubbard" most of the work .It "John Kohl" refined it for NetBSD .El .Sh BUGS Sure to be some.