#!/usr/bin/perl
#
# $Id: prtcheckmissing,v 1.1 2003/10/27 15:26:50 opel Exp $
#      prtcheckmissing,v 1.2 2022/05/31 18:41:19 jmq Exp $

use strict;
use warnings;

my @mask = parse_pkgadd_conf();

open (my $dbh, "/var/lib/pkg/db") or die "Could not read package database!\n";
local $/ = ""; # read files paragraph-wise; see ``perldoc perlvar''

while(<$dbh>) {
		my ($name, $version, @files) = split /\n/;

		# apply the pkgadd rules to eliminate false positives
		my @missing = grep { (! -e "/$_") && wanted($_, @mask) } @files;

		# final report for this package
		next if not @missing;
		print map "/$_ $name\n", @missing;
}
close($dbh);

sub parse_pkgadd_conf {
  my @unwanted;
  local $/ = "\n";
  open my $pah, "< /etc/pkgadd.conf"
    or die "Couldn't open pkgadd install rules!\n";

  while(<$pah>) {
    next if /^\s*#/ or /^$/;
    my ($event, $pattern, $choice) = split;
    push (@unwanted, qr/$pattern/s) if ($event eq "INSTALL" and $choice eq "NO");
  }
  close ($pah);

  return @unwanted;
}

sub wanted {
  my $testfile = shift;
  my $retval = 1;
  while (my $regexp=shift) {
    $retval = 0 if $testfile =~ $regexp;
    last if $retval==0;
  }
  return $retval;
}