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NetBSD 6.1.5 - man page for pkg_delete (netbsd section 1)

PKG_DELETE(1)			   BSD General Commands Manual			    PKG_DELETE(1)

NAME
     pkg_delete -- a utility for deleting previously installed software package distributions

SYNOPSIS
     pkg_delete [-ADFfkNnORrVv] [-K pkg_dbdir] [-P destdir] [-p prefix] pkg-name ...

DESCRIPTION
     The pkg_delete command is used to delete packages that have been previously installed with
     the pkg_add(1) command.  The given packages are sorted, so that the dependencies needed by a
     package are deleted after the package.  Before any action is executed, pkg_delete checks for
     packages that are marked as preserved or have depending packages left.  If the -k flag is
     given, preserved packages are skipped and not removed.  Unless the -f flag is given,
     pkg_delete stops on the first error.

WARNING
     Since the pkg_delete 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.

     You are advised to verify the competence and identity of those who provide installable pack-
     age files.  For extra protection, examine all the package control files in the package
     record directory <PKG_DBDIR>/<pkg-name>/).  Pay particular attention to any +INSTALL or
     +DEINSTALL files, and inspect the +CONTENTS file for @cwd, @mode (check for setuid), @dirrm,
     @exec, and @unexec directives, and/or use the pkg_info(1) command to examine the installed
     package control files.

OPTIONS
     The following command line options are supported:

     pkg-name ...
	     The named packages are deinstalled, wildcards can be used, see pkg_info(1).  If no
	     version is given, the one currently installed will be removed.  If the -F flag is
	     given, one or more (absolute) filenames may be specified and the package database
	     will be consulted for the package to which the given file belongs.  These packages
	     are then deinstalled.

     -A      Recursively remove all automatically installed packages that were needed by the
	     given packages and are no longer required.  Does not remove manually installed pack-
	     ages; see also the -R flag.

     -D      If a deinstallation script exists for a given package, do not execute it.

     -F      Any pkg-name given will be interpreted as pathname which is subsequently transformed
	     in a (real) package name via the package database.  That way, packages can be
	     deleted by giving a filename instead of the package-name.

     -f      Force removal of the package, even if a dependency is recorded or the deinstall
	     script fails.  This might break the package database; see pkg_admin(1) on how to
	     repair it.

     -ff     Force removal of the package, even if the package is marked as a preserved package.
	     Note that this is a dangerous operation.  See also the -k option.

     -K pkg_dbdir
	     Override the value of the PKG_DBDIR configuration option with the value pkg_dbdir.

     -k      Silently skip all packages that are marked as preserved.

     -N      Remove the package's registration and its entries from the package database, but
	     leave the files installed.  Don't run any deinstall scripts or @unexec lines either.

     -n      Don't actually deinstall a package, just report the steps that would be taken.

     -O      Only delete the package's entries from the package database; do not touch the pack-
	     age or its files itself.

     -P destdir
	     Prefix all file and directory names with destdir.	For packages without install
	     scripts this has the same behavior as using chroot(8).

     -p prefix
	     Set 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 auto-
	     matically to the installed location by pkg_add(1).

     -R      Recursively remove all packages that were needed by the given packages and are no
	     longer required.  This option overrides the -A flag.

     -r      Recursively remove all packages that require one of the packages given.

     -V      Print version number and exit.

     -v      Turn on verbose output.

TECHNICAL DETAILS
     pkg_delete does pretty much what it says.	It examines installed package records in
     <PKG_DBDIR>/<pkg-name>, deletes the package contents, and finally removes the package
     records.

     If a package is required by other installed packages, pkg_delete will list those dependent
     packages and refuse to delete the package (unless the -f option is given).

     If a package has been marked as a preserved package, it will not be able to be deleted
     (unless more than one occurrence of the -f option is given).

     If a filename is given instead of a package name, the package of which the given file
     belongs to can be deleted if the -F flag is given.  The filename needs to be absolute, see
     the output produced by the pkg_info(1) -aF command.

     If a deinstall script exists for the package, it is executed before and after any files are
     removed.  It is this script's responsibility to clean up any additional messy details around
     the package's installation, since all pkg_delete knows how to do is delete the files created
     in the original distribution.  The deinstall script is called as:
	   deinstall <pkg-name> VIEW-DEINSTALL
     before removing the package from a view, and as:
	   deinstall <pkg-name> DEINSTALL
     before deleting all files and as:
	   deinstall <pkg-name> POST-DEINSTALL
     after deleting them.  Passing the keywords VIEW-DEINSTALL, DEINSTALL, and POST-DEINSTALL
     lets you potentially write only one program/script that handles all aspects of installation
     and deletion.

     All scripts are called with the environment variable PKG_PREFIX set to the installation pre-
     fix (see the -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 -p option when running pkg_delete or pkg_add(1).  The
     scripts are also called with the PKG_METADATA_DIR environment variable set to the location
     of the +* meta-data files, and with the PKG_REFCOUNT_DBDIR environment variable set to the
     location of the package reference counts database directory.  If the -P flag was given to
     pkg_delete, PKG_DESTDIR will be set to destdir.

ENVIRONMENT
     See pkg_install.conf(5) for options, that can also be specified using the environment.

SEE ALSO
     pkg_add(1), pkg_admin(1), pkg_create(1), pkg_info(1), pkg_install.conf(5) pkgsrc(7)

AUTHORS
     Jordan Hubbard
	     most of the work
     John Kohl
	     refined it for NetBSD
     Hubert Feyrer
	     NetBSD wildcard dependency processing, pkgdb, recursive "down" delete, etc.
     Joerg Sonnenberger
	     Rewrote most of the code to compute correct order of deinstallation and to improve
	     error handling.

BSD					 January 20, 2010				      BSD


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