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Current File : /proc/self/root/usr/share/insserv/check-archive-initd-scripts
#!/usr/bin/perl
#
# Check the consistency of all init.d scripts in the archive.  Run
# this on bellini.debian.org.

use warnings;
use strict;
use File::Basename;

my $warn = 1;

my $basedir = "/org/lintian.debian.org/laboratory/binary";

my @scripts = @ARGV;
@scripts = <$basedir/*/init.d/*> unless (@scripts);

my %scriptinfo;
my %provides;

my @virts = qw($local_fs $remote_fs $syslog $time $named
               $portmap $network $all
               $mail-transport-agent $x-font-server
               $null $x-display-manager
               );
my @harddepheaders = qw(required-start required-stop);
my @softdepheaders = qw(should-start
                    should-stop x-start-before x-stop-after);
my $lsbheaders = "Provides|Required-Start|Required-Stop|Default-Start|Default-Stop";
my $optheaders = "x-start-before|x-stop-after|should-start|should-stop";

for my $virt (@virts) {
    $provides{$virt} = ['insserv/etc/insserv.conf'];
}

# Ignore obsolete scripts, as these are unlikely to cause problems.
for my $old (qw(glibc evms raid2 ldm sdm)) {
    $provides{$old} = ['obsolete'];
}

# First pass to load the database
for my $initdscript (@scripts) {
    next if $initdscript =~ m%/rc|/rcS|/README%;
    my %lsbinfo = parse_lsb_header($initdscript);
    $scriptinfo{$initdscript} = \%lsbinfo;
    next unless ($lsbinfo{'found'});

    my %checked;
    for my $provide (split(/[ ,\t]+/, $lsbinfo{provides})) {
        if (exists $provides{$provide}) {
            push(@{$provides{$provide}}, $initdscript)
        } else {
            $provides{$provide} = [$initdscript];
        }
        $checked{$provide} = 1;
    }
}

for my $provide (sort keys %provides) {
    if (1 < scalar @{$provides{$provide}}) {
        my %script;
        map { $script{basename($_)} = 1; } @{$provides{$provide}};
        if (1 < scalar keys %script) {
            error(sprintf("scripts %s provide duplicate '%s'",
                          join(",", short_name(@{$provides{$provide}})),
                          $provide));
        }
    }
}

# Second pass, to see which dependencies are missing
for my $initdscript (@scripts) {
    next unless ($scriptinfo{$initdscript}->{'found'});
    my $short = short_name($initdscript);
    my %checked;
    my @hardmissing = ();
    for my $header (@harddepheaders) {
        my $list = $scriptinfo{$initdscript}->{$header};
        next unless defined $list;
        for my $facility (split(/[ ,\t]+/, $list)) {
            next if exists $checked{$facility};
            $checked{$facility} = 1;
            push(@hardmissing, $facility)
                unless exists $provides{$facility};
        }
    }
    error("script $short depend on non-existing provides: "
          . join(" ", @hardmissing)) if (@hardmissing);
    my @softmissing = ();
    for my $header (@softdepheaders) {
        my $list = $scriptinfo{$initdscript}->{$header};
        next unless defined $list;
        for my $facility (split(/[ ,\t]+/, $list)) {
            next if exists $checked{$facility};
            $checked{$facility} = 1;
            push(@softmissing, $facility)
                unless exists $provides{$facility};
        }
    }
    warning("script $short relate to non-existing provides: "
            . join(" ", @softmissing)) if (@softmissing);

    if (exists $checked{'$syslog'}
        && $scriptinfo{$initdscript}->{'default-start'} =~ m/s/i) {
        error("script $short depend on \$syslog and start from rcS.d/");
    }
    if (!exists $checked{'$remote_fs'}
        && !exists $checked{'$syslog'}
        && $scriptinfo{$initdscript}->{'need_remote_fs'}
        && $scriptinfo{$initdscript}->{'default-start'} =~ m/s/i) {
        warning("script $short possibly missing dependency on \$remote_fs");
    } elsif (!exists $checked{'$local_fs'}
             && !exists $checked{'$remote_fs'}
             && !exists $checked{'$syslog'}
             && $scriptinfo{$initdscript}->{'need_local_fs'}
             && $scriptinfo{$initdscript}->{'default-start'} =~ m/s/i) {
        warning("script $short possibly missing dependency on \$local_fs");
    }

    if (!exists $checked{'$syslog'}
        && $scriptinfo{$initdscript}->{'need_syslog'}) {
        warning("script $short possibly missing dependency on \$syslog");
    }

    my %provided;
    for my $provide (split(/[ ,\t]+/,
                           $scriptinfo{$initdscript}->{provides})) {
        $provided{$provide} = 1;
        if ($provide =~ m/\$/) {
            error("script $short provide virtual facility $provide");
        }
    }

    my $basename = basename($initdscript, ".sh");
    info("script $short does not provide its own name")
        unless exists $provided{$basename};

    # Detect common problems with runlevel settings.
    my @startrl = sort split(/\s+/, lc($scriptinfo{$initdscript}->{'default-start'}));
    my @stoprl = sort split(/\s+/, lc($scriptinfo{$initdscript}->{'default-stop'}));

    unless ( @startrl || @stoprl) {
        error("script $short do not start or stop in any runlevels");
    }
    # Scripts starting in rcS.d/ normally do not stop or only stop
    # during hald and shutdown.
    elsif ((array_equal(['s'], \@startrl) && array_equal([], \@stoprl))
        || ( array_equal(['s'], \@startrl)
             && array_equal(['0','6'], \@stoprl))) {
        # OK
    } else {
        # Most scripts either start in rcS.d, or in runlevels 2-5
        if (!array_equal(['2', '3', '4', '5'], \@startrl) &&
            !array_equal(['s'], \@startrl) &&
            (!array_equal([], \@startrl) && @stoprl)) {
            # Some obvious errors (runlevels 2-5 are equivalent in Debian)
            if (array_equal(['3', '5'], \@startrl)
                || array_equal(['3', '4', '5'], \@startrl)) {
                error("script $short have inconsistent start runlevels: ",
                      join(" ", @startrl));
            } else {
                warning("script $short does not start in the usual runlevels: ",
                        join(" ", @startrl));
            }
        }

        # And most scripts stop in runlevel (1) runlevels (0, 1, 6),
        # only starts or only stops in (0) or (6).
        if (!array_equal(['0', '1', '6'], \@stoprl) &&
            !array_equal(['1'], \@stoprl) &&
            !array_equal(['0', '6'], \@stoprl) &&
            !(array_equal(['0'], \@stoprl) && !@startrl) &&
            !(array_equal(['6'], \@stoprl) && !@startrl) &&
            !(array_equal([], \@stoprl) && @startrl)) {
            warning("script $short does not stop in the usual runlevels: ",
                    join(" ", @stoprl));
        }
    }
}

exit 0;

sub parse_lsb_header {
    my $initdscript = shift;
    my $short = short_name($initdscript);
    my %lsbinfo;
    unless (open(INIT, "<", $initdscript)) {
        error("script $short is unreadable");
        return ();
    }
    my $inheader = 0;
    while (<INIT>) {
#        print;
        chomp;
        if (m/^\#\#\# BEGIN INIT INFO\s*$/) {
            $lsbinfo{'found'} = 1;
            $inheader = 1;
        }
        $inheader = 0 if (m/\#\#\# END INIT INFO$/);
        if ($inheader
            && m/^\# ($lsbheaders|$optheaders):\s*(\S?.*)$/i) {
#            print "$1\n";
            $lsbinfo{lc($1)} = $2;
        }
        s/\#.*$//; # Remove comments
        $lsbinfo{'need_remote_fs'} = 1 if m%/usr/s?bin/%;
        $lsbinfo{'need_local_fs'} = 1 if m%/var/%;

        # Detect the use of tools resting in /usr/
        $lsbinfo{'need_remote_fs'} = 1 if m%awk%;
        $lsbinfo{'need_remote_fs'} = 1 if m%which%;
    }
    close(INIT);

    # When running on bellini.debian.org, check if $syslog is needed
    my $objdumpinfo = dirname($initdscript) . "/../objdump-info";
    if ( -f $objdumpinfo) {
        print "Checking for syslog symbol\n";
        if (open(OBJDUMP, "<", $objdumpinfo)) {
            while (<OBJDUMP>) {
                $lsbinfo{'need_syslog'} = 1 if /GLIBC.* syslog/;
            }
            close OBJDUMP;
        }
    }

    # Check that all the required headers are present
    if (!$lsbinfo{'found'}) {
        error("script $short is missing LSB header");
    } else {
        for my $key (split(/\|/, lc($lsbheaders))) {
            if (!exists $lsbinfo{$key}) {
                error("script $short missing LSB keyword '$key'");
            }
        }
    }
    return %lsbinfo
}

sub short_name {
    my @scripts;
    for my $script ( @_ ) {
        my $copy = $script;
        $copy =~ s%$basedir/%%g;
        push @scripts, $copy;
    }
    if (wantarray) {
        return @scripts;
    } else {
        return $scripts[0];
    }
}

sub array_equal {
    my ($a1, $a2) = @_;
    return 0 if (scalar @{$a1} != scalar @{$a2});

    my $i = 0;
    while ($i < scalar @{$a1}) {
        return 0 if $a1->[$i] ne $a2->[$i];
        $i++;
    }
    return 1;
}

sub info {
    print "info: @_\n";
}

sub warning {
    print "warning: @_\n" if $warn;
}

sub error {
    print "error: @_\n";
}

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