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#!/usr/bin/perl -w
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#############################################################################
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##
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## YARD_CHROOT_TEST
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## Code from CHECK_ROOT_FS by Tom Fawcett
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## Copyright (C) 1996,1997,1998 Tom Fawcett (fawcett@croftj.net)
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## Copyright (C) 2000 Modifications by the gBootRoot Team
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##
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## This program is free software; you may redistribute it and/or modify
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## it under the terms of the GNU General Public License as published by
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## the Free Software Foundation; either version 2 of the License, or
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## (at your option) any later version.
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##
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## This program is distributed in the hope that it will be useful,
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## but WITHOUT ANY WARRANTY; without even the implied warranty of
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## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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## GNU General Public License for more details.
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##
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## You should have received a copy of the GNU General Public License
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## along with this program; if not, write to the Free Software
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## Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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##
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#####
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##
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## The purpose of this program is to run chrooted processes separately from
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## gBootRoot so that gBootRoot can continue to operate on "/", not on the
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### chroot "/".
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##
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##############################################################################
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use strict;
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use BootRoot::Yard;
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use File::Path;
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use File::Find;
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my $login_binary;
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my $mount_point = $ARGV[0];
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my %checked;
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my $checked_for_getty_files;
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which_test();
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sub which_test {
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my $test_fstab = $ARGV[1];
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my $test_inittab = $ARGV[2];
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my $test_scripts = $ARGV[3];
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if ( $test_fstab == 1 ) {
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print "\nTEST: fstab";
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fork_chroot_and(\&check_fstab);
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}
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if ( $test_inittab == 1 ) {
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print "\nTEST: inittab";
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fork_chroot_and(\&check_inittab);
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}
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if ( $test_scripts == 1 ) {
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print "\nTEST: scripts";
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fork_chroot_and(\&check_scripts);
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}
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} # end sub which_test
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# This takes a procedure call, forks off a subprocess, chroots to
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# $mount_point and runs the procedure.
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sub fork_chroot_and {
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my($call) = @_;
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my($Godot) = fork;
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unless (defined $Godot) {
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die "Can't fork: $!";
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}
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if (!$Godot) {
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# Child process
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chdir($mount_point);
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chroot($mount_point); ##### chroot to the root filesystem
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&$call;
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exit;
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} else {
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# Parent here
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waitpid($Godot, 0);
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}
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}
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sub check_fstab {
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my($FSTAB) = "/etc/fstab";
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my($proc_seen);
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open(FSTAB, "<$FSTAB") or error_test ("$FSTAB: $!");
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if (-z $FSTAB) {
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error_test ("fstab is an empty file");
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}
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print "\nChecking $FSTAB\n";
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while (<FSTAB>) {
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chomp;
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next if /^\#/ or /^\s*$/;
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my($dev, $mp, $type, $opts) = split;
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next if $mp eq 'none' or $type eq 'swap';
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next if $dev eq 'none';
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if (!-e $mp) {
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print "$FSTAB($.): $_\n\tCreating $mp on root filesystem\n";
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mkpath($mp);
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}
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if ($dev !~ /:/ and !-e $dev) {
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warning("$FSTAB($.): $_\n\tDevice $dev does not exist "
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. "on root filesystem\n");
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}
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##### If you use the file created by create_fstab, these tests
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##### are superfluous.
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if ($dev =~ m|^/dev/hd| and $opts !~ /noauto/) {
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warning("\t($.): You probably should include \"noauto\" option\n",
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"\tin the fstab entry of a hard disk. When the rescue floppy\n",
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"\tboots, the \"mount -a\" will try to mount $dev\n");
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} elsif ($dev eq $::floppy and $type ne 'ext2' and $type ne 'auto') {
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warning("\t($.): You've declared your floppy drive $::floppy",
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" to hold\n",
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"\ta $type filesystem, which is not ext2. The rescue floppy\n",
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"\tis ext2, which may confuse 'mount -a' during boot.\n");
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} elsif ($type eq 'proc') {
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$proc_seen = 1;
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}
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}
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close(FSTAB);
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warning("\tNo /proc filesystem defined.\n") unless $proc_seen;
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print "Done with $FSTAB\n";
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}
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sub check_inittab {
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my($INITTAB) = "/etc/inittab";
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print "\nChecking $INITTAB\n";
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if (!open(INITTAB, "<$INITTAB")) {
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warning("$INITTAB: $!\n");
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return
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}
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if (-z $INITTAB) {
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error_test ("fstab is an empty file");
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}
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my($default_rl, $saw_line_for_default_rl);
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while (<INITTAB>) {
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chomp;
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my($line) = $_; # Copy for errors
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s/\#.*$//; # Delete comments
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next if /^\s*$/; # Skip empty lines
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my($code, $runlevels, $action, $command) = split(':');
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if ($action eq 'initdefault') { ##### The initdefault runlevel
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$default_rl = $runlevels;
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next;
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}
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if ($runlevels =~ /$default_rl/) {
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$saw_line_for_default_rl = 1;
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}
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if ($command) {
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my($exec, @args) = split(' ', $command);
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if (!-f $exec) {
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warning("$INITTAB($.): $line\n",
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"\t$exec: non-existent or non-executable\n");
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} elsif (!-x $exec) {
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print "$INITTAB($.): $line\n";
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print "\tMaking $exec executable\n";
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chmod(0777, $exec) or error_test("chmod failed: $!");
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} else {
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##### executable but not binary ==> script
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scan_command_file($exec, @args) if !-B $exec;
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}
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if ($exec =~ m|getty|) { # matches *getty* call
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check_getty_type_call($exec, @args);
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}
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}
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}
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close(INITTAB) or error_test("close(INITTAB): $!");
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if (!$saw_line_for_default_rl) {
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warning("\tDefault runlevel is $default_rl, but no entry for it.\n");
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}
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print "Done with $INITTAB\n";
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}
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sub check_scripts {
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print "\nChecking script interpreters\n";
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local($::prog);
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sub check_interpreter {
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if (-x $File::Find::name and -f _ and -T _) {
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open(SCRIPT, $File::Find::name) or error_test("$File::Find::name: $!");
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my($prog, $firstline);
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chomp($firstline = <SCRIPT>);
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if (($prog) = $firstline =~ /^\#!\s*(\S+)/) {
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if (!-e $prog) {
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warning("Warning: \$File::Find::name needs $prog which is missing\n");
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} elsif (!-x $prog) {
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warning("Warning: \$File::Find::name needs $prog, " .
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"which is not executable.\n");
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}
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}
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close(SCRIPT);
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}
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} # End of sub check_interpreter
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find(\&check_interpreter, "/");
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}
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##### This could be made much more complete, but for typical rc type
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##### files it seems to catch the common problems.
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sub scan_command_file {
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my($cmdfile, @args) = @_;
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my(%warned, $line);
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return if $checked{$cmdfile};
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print "\nScanning $cmdfile\n";
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open(CMDFILE, "<$cmdfile") or error "$cmdfile: $!";
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while ($line = <CMDFILE>) {
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chomp($line);
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next if $line =~ /^\#/ or /^\s*$/;
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next if $line =~ /^\w+=/;
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while ($line =~ m!(/(usr|var|bin|sbin|etc|dev)/\S+)(\s|$)!g) {
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my($abs_file) = $1;
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# next if $abs_file =~ m/[*?]/; # Skip meta chars - we don't trust glob
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next if $warned{$abs_file}; # Only warn once per file
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if (!-e $abs_file) {
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warning ("$cmdfile($.): $line\n\t$1: missing on root filesystem\n");
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$warned{$abs_file} = 1;
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}
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}
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}
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close(CMDFILE) or error "close($cmdfile): $!";
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$checked{$cmdfile} = 1;
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print "Done scanning $cmdfile\n";
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} # end sub scan_command_file
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sub check_getty_type_call {
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my($prog, @args) = @_;
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if ($prog eq 'getty') {
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my($tty, $speed, $type) = @args;
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if (!-e "$mount_point/dev/$tty") {
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warning ("\tLine $.: $prog for $tty, but /dev/$tty doesn't exist.\n");
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}
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##if (!defined($Termcap{$type})) {
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## warning ("\tLine $.: Type $type not defined in termcap\n");
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##}
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}
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## If getty or getty_ps, look for /etc/gettydefs, /etc/issue
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## Check that term type matches one in termcap db.
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if ($prog =~ /^getty/) {
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if (!$checked_for_getty_files) {
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warning ("\tLine $.: $prog expects /etc/gettydefs, which is missing.\n")
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unless -e "$mount_point/etc/gettydefs";
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warning ("\tLine $.: $prog expects /etc/issue, which is missing.\n")
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unless -e "$mount_point/etc/issue";
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$checked_for_getty_files = 1;
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}
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}
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} # end sub check_getty_type_call
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sub warning {
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print "\n", @_;
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}
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sub error_test {
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print STDERR "\nError: ", @_, "\n";
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exit(-1);
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}
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