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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 [-c] [-F] [-l] [-R] [-x]
# Options:
# -c: Show comments, too; only works with '-l' (ignored otherwise)
# -F: Fix package db after each deinstallation run (via 'pkgdb -F')
# -l: List leaf packages only, don't ask if they should be deinstalled
# -R: Run 'pkg_deinstall -R' instead of plain 'pkg_deinstall'
# -x: Honor exclude list in $excludefile
use strict;
my $dbdir = "/var/db/pkg";
my $excludefile = "/usr/local/etc/pkg_leaves.exclude";
my $pkgdeinstall = "/usr/local/sbin/pkg_deinstall";
my @pkgdb_args = ("/usr/local/sbin/pkgdb", "-F");
my ($opt_comments, $opt_listonly, $opt_excludelist, $opt_recursive, $opt_pkgdb);
my $exclpattern;
#
# Read the exclude list if the file exists
# Parameter: path of the exclude file
#
sub get_excl_pattern {
my $excl_file = shift;
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 . ".*";
push @excludes, $exclude;
}
}
close(EXCLFILE);
# Provide a dummy exclusion pattern if @excludes is empty
$excl_pattern = scalar(@excludes) ? join("|", @excludes) : " ";
} else {
# Dummy exclusion pattern -> doesn't exclude anything
$excl_pattern = " ";
}
return $excl_pattern;
}
#
# Get a hash (name => comment) of all leaves
# Parameters: - path to package database
# - pattern of packages to exclude
#
sub get_leaves {
my $db_dir = shift;
my $excl_pattern = shift;
my %leaves;
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';
my $commentfile = $path . '/+COMMENT';
# Exclude non-directories, "." and ".."
if (($file ne ".") && ($file ne "..") && (-d $path) && (!-s $reqlist)) {
# Exclude packages matching exclude pattern, if requested
unless ($file =~ m/$excl_pattern/) {
# Read package's short description/comment
my $comment;
if ((-s $commentfile) && (open(COMMENT, $commentfile))) {
$comment = <COMMENT>;
chomp($comment);
close(COMMENT);
} else {
$comment = "No short description";
}
$leaves{$file} = $comment;
}
}
}
closedir(DBDIR);
return %leaves;
}
# Examine command line arguments
while(@ARGV) {
my $arg = shift(@ARGV);
if ($arg eq "-c") {
$opt_comments = 1;
}
elsif ($arg eq "-F") {
$opt_pkgdb = 1;
}
elsif ($arg eq "-l") {
$opt_listonly = 1;
}
elsif ($arg eq "-R") {
$opt_recursive = 1;
}
elsif ($arg eq "-x") {
$opt_excludelist = 1;
} else {
warn "Unrecognized command line argument $arg ignored.\n";
}
}
# Exclusion requested?
if ($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 %leaves = get_leaves($dbdir, $exclpattern);
foreach my $leaf (sort keys %leaves) {
if ($opt_comments) {
print "$leaf - $leaves{$leaf}\n";
} else {
print "$leaf\n";
}
}
} else {
my %leavestokeep;
my %leavestocut;
my @cutleaves;
my ($nleaves, $i);
# Loop while the user wants to
my $again = "y";
ROUND: while($again eq "y") {
# Get list of leaf packages and put them into a hash
my %leaves = get_leaves($dbdir, $exclpattern);
# Ignore all leaves the user already told us to keep
foreach my $leaf (keys %leavestokeep) {
if ($leaves{$leaf}) {
delete $leaves{$leaf};
}
}
# Any leaves left?
$nleaves = keys %leaves;
if ($nleaves == 0) {
# If not, don't go on, there's nothing left to do.
print "Didn't find any new leaves, exiting.\n";
last ROUND;
}
# Always start with an empty list of leaves to cut
%leavestocut = ();
# Initialize counter for progress status
$i = 1;
LEAVESLOOP: foreach my $leaf (sort keys %leaves) {
print "Package $i of $nleaves:\n";
print "$leaf - $leaves{$leaf}\n";
print "$leaf - [keep]/(d)elete/(f)lush marked pkgs/(a)bort? ";
# Get first character of input, without leading whitespace
my ($answer) = (lc(<STDIN>) =~ m/(\S)/);
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;
}
$i++;
} # LEAVESLOOP
# Initialize 'progress meter'
my $ncuts = keys %leavestocut;
my $noff = 0;
# loop through packages marked for removal and pkg_deinstall them
foreach my $leaf (sort keys %leavestocut) {
$noff++;
print "Deleting $leaf (package $noff of $ncuts).\n";
my @deinstall_args;
if ($opt_recursive) {
@deinstall_args = ($pkgdeinstall, '-R', $leaf);
} else {
@deinstall_args = ($pkgdeinstall, $leaf);
}
if ((my $status = system(@deinstall_args) >> 8) != 0) {
print STDERR "\n\n$0: pkg_deinstall returned $status - exiting, fix this first.\n\n";
last ROUND;
}
push @cutleaves, $leaf;
}
# Run 'pkgdb -F' if requested
if ($opt_pkgdb) {
print "Running 'pkgdb -F'.\n";
if ((my $status = system(@pkgdb_args) >> 8) != 0) {
print STDERR "\n\n$0: pkgdb returned $status - exiting, fix this first.\n\n";
last ROUND;
}
}
print "Go on with new leaf packages ((y)es/[no])? ";
# Get first character of input, without leading whitespace
($again) = (lc(<STDIN>) =~ m/(\S)/);
print "\n";
} # ROUND
# print list of removed packages, sorted lexically, and their number
print "** Deinstalled packages:\n";
foreach my $cutleaf (sort @cutleaves) {
print "$cutleaf\n";
}
my $noff = @cutleaves;
print "** Number of deinstalled packages: $noff\n";
}
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