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#!/usr/bin/perl
#
# Copyright (c) 2003 Stefan Walter <sw@gegenunendlich.de>
#
# All rights reserved.
#
# 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.
#
# THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
#
# $FreeBSD$
# Interactive script for deinstalling "leaf" packages;
# requires the portupgrade tools
#
# Syntax: pkg_cutleaves [-l] [-x] [-R]
# Options:
# -l: List leaf packages only, don't ask if they should be deinstalled
# -x: Honor exclude list in $excludefile
# -R: Run 'pkg_deinstall -R' instead of plain 'pkg_deinstall'
use strict;
my $dbdir = "/var/db/pkg";
my $excludefile = "/usr/local/etc/pkg_leaves.exclude";
my $pkgdeinstall = "/usr/local/sbin/pkg_deinstall";
my ($opt_listonly, $opt_excludelist, $opt_recursive);
my $exclpattern;
# Read the exclude list if the file exists
sub get_excl_pattern {
my $excl_file = $_[0];
my $excl_pattern;
# Does the exclude file exist?
if (($excl_file) && (-f $excl_file) && (-T $excl_file)) {
# Read the patterns to be excluded
my @excludes;
open(EXCLFILE, $excl_file)
or die "Couldn't open $excl_file!";
while(my $exclude = <EXCLFILE>) {
chomp($exclude);
# Ignore comments and empty lines, add others as regular expressions
unless (($exclude =~ m/(^ *#)|(^ *$)/)) {
$exclude = "^" . $exclude . ".*";
@excludes = (@excludes, $exclude);
}
}
close(EXCLFILE);
$excl_pattern = join("|", @excludes);
} else {
# Dummy exclusion pattern -> doesn't exclude anything
$excl_pattern = " ";
}
return $excl_pattern;
}
# Get a list of all leaves
sub get_leaves {
my $db_dir = $_[0];
my $excl_pattern = $_[1];
my @pkgdirs;
opendir(DBDIR, $db_dir)
or die "Can't open package db directory $db_dir!";
while(defined(my $file = readdir(DBDIR))) {
my $path = $db_dir . '/' . $file;
my $reqlist = $path . '/+REQUIRED_BY';
# Exclude non-directories, "." and ".."
if (($file ne ".") && ($file ne "..") && (-d $path) && (!-s $reqlist)) {
# Exclude packages matching exclude pattern, if requested
unless ($file =~ m/$excl_pattern/) {
@pkgdirs = (@pkgdirs, $file);
}
}
}
closedir(DBDIR);
return @pkgdirs;
}
# Examine command line arguments
while(@ARGV) {
my $arg = shift(@ARGV);
if ($arg eq "-x") {
$opt_excludelist = 1;
}
elsif ($arg eq "-l") {
$opt_listonly = 1;
}
elsif ($arg eq "-R") {
$opt_recursive = 1;
}
}
# Exclusion requested?
if ($opt_excludelist) {
# Get exclusion pattern
$exclpattern = get_excl_pattern($excludefile);
} else {
# Spaces don't appear in package names -> this doesn't exclude anything
$exclpattern = " ";
}
if ($opt_listonly) {
# Just print out the list of leaves, one per line
my @leaveslist = get_leaves($dbdir, $exclpattern);
foreach my $leaf (sort @leaveslist) {
print "$leaf\n";
}
} else {
my %leavestokeep;
my %leavestocut;
my @cutleaves;
# Loop while the user wants to
my $again = "y";
ROUND: while($again eq "y") {
# Get list of packages and put them into an array
my @leaves = get_leaves($dbdir, $exclpattern);
LEAVESLOOP: foreach my $leaf (sort @leaves) {
if (!$leavestokeep{$leaf}) {
print "$leaf - [keep]/(d)elete/(f)lush marked pkgs/(a)bort? ";
my $answer = substr(lc(<STDIN>), 0, 1);
if ($answer eq "d") {
print "** Marking $leaf for removal.\n\n";
$leavestocut{$leaf} = 1;
}
elsif ($answer eq "f") {
print "\n";
last LEAVESLOOP;
}
elsif ($answer eq "a") {
print "\n";
last ROUND;
}
else {
print "** Keeping $leaf.\n\n";
$leavestokeep{$leaf} = 1;
}
}
} # LEAVESLOOP
# loop through packages marked for removal and pkg_deinstall them
foreach my $leaf (sort keys %leavestocut) {
print "Deleting $leaf.\n";
my @deinstall_args;
if ($opt_recursive) {
@deinstall_args = ($pkgdeinstall, '-R', $leaf);
} else {
@deinstall_args = ($pkgdeinstall, $leaf);
}
if ((my $status = system(@deinstall_args) >> 8) != 0) {
print "\nError: pkg_deinstall returned $status - exiting, fix this first.\n\n";
last ROUND;
}
@cutleaves = (@cutleaves, $leaf);
delete $leavestocut{$leaf};
}
print "Once more ((y)es/[no])? ";
$again = substr(lc(<STDIN>), 0, 1);
print "\n";
} # ROUND
# print list of removed packages
print "** Deinstalled packages:\n";
foreach my $cutleaf (@cutleaves) {
print "$cutleaf\n";
}
}
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