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gbootroot/BootRoot/Yard.pm
freesource 6c6b41a760 # This is the revised link specification which is more 
# intuitive and allows user-defined links.
	  # The file can be fictional.  $abs_file_file means there is
	  # something on the right side.  Generally, we want to use
	  # the file on the right as the real file.
Simply put, this is a much better approach to handling -> in the template,
and it works nicely.  It produces warning when the file on the right can't
be discerned, but this is o.k..
2001-11-18 04:05:37 +00:00

2618 lines
74 KiB
Perl
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############################################################################
##
## Yard.pm combining
## MAKE_ROOT_FS, CHECK_ROOT_FS, and YARD_UTILS.PL by Tom Fawcett
## Copyright (C) 1996,1997,1998 Tom Fawcett (fawcett@croftj.net)
## Copyright (C) 2000,2001 Modifications by Jonathan Rosenbaum
## <freesource@users.sourceforge.net>
##
## This program is free software; you may redistribute it and/or modify
## it under the terms of the GNU General Public License as published by
## the Free Software Foundation; either version 2 of the License, or
## (at your option) any later version.
##
## This program is distributed in the hope that it will be useful,
## but WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
## GNU General Public License for more details.
##
## You should have received a copy of the GNU General Public License
## along with this program; if not, write to the Free Software
## Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
##
#####
##
## This is a heavily modified version of several scripts from the Yard
## Suite (v2.0) by Tom Fawcett. The modifications allow gBootRoot to use
## Yard as a Method.
##
##############################################################################
package BootRoot::Yard;
use vars qw(@ISA @EXPORT %EXPORT_TAGS);
use Exporter;
@ISA = qw(Exporter);
@EXPORT = qw(start_logging_output info kernel_version_check verbosity
read_contents_file extra_links library_dependencies hard_links
space_check create_filesystem find_file_in_path sys device_table
text_insert error logadj *LOGFILE which_tests create_fstab
make_link_absolute make_link_relative cleanup_link); # these last two added
# as a test
use strict;
use File::Basename;
use File::Path;
use FileHandle;
use Cwd; # I am not even sure if this is being used here now
use English; # I think this can be ditched for portability
use File::Find; # used by check_root_fs
use BootRoot::Error;
my (%Included, %replaced_by, %links_to, %is_module, %hardlinked,
%strippable, %lib_needed_by, @Libs, %user_defined_link);
my $cf_line = 0;
my $BLKGETSIZE_ioctl = 4704;
my $BLKFLSBUF_ioctl = 4705;
my $EXT2_BLOCK_SIZE = 1024;
my $INODE_SIZE = 1024;
my $objcopy = "objcopy";
my($Warnings) = 0;
my $verbosity;
my ($text_insert,$red,$blue);
my $logadj;
my ($device, $mount_point);
my $contents_file_tmp; # Checks for template name change
my @pathlist;
# This solves an annoying problem with the new Perl-5.6 built in glob,
# allowing earlier versions of Perl to run.
# But the new glob is a good thing for this program since it doesn't have to
# depend on outside programs, making Tom's test_glob() history.
BEGIN {
if ($] =~ /006/) {
require File::Glob;
}
}
STDOUT->autoflush(1);
$SIG{__WARN__} =
sub { warn @_ unless $_[0] =~ /Subroutine [\w:]+ redefined/io };
sub warning {
info(0, "Warning: ", @_);
$Warnings++;
}
sub verbosity { $verbosity = $_[0]; }
sub text_insert { $text_insert = $_[0]; $red = $_[1]; $blue = $_[2]; }
sub logadj { $logadj = $_[0]; }
## REQUIRES $kernel opt. $kernel_version
sub kernel_version_check {
my($kernel,$kernel_version) = @_;
if (defined($kernel_version)) {
# Check to see if it agrees
my($version_guess) = kernel_version($kernel);
if ($version_guess ne $kernel_version) {
## Is this really necessary, it can be assumed a person knows
## what they are doing.
info(0,
"You declared kernel $kernel to be version $kernel_version\n",
"even though a probe says $version_guess.",
" I'll assume you're right.\n")
}
$ENV{'RELEASE'} = $kernel_version;
} elsif (defined($ENV{'RELEASE'} = kernel_version($kernel))) {
info(0, "\nVersion probe of $kernel returns: $ENV{'RELEASE'}\n");
} else {
warning "Can't determine kernel version of $kernel\n";
my($release) = `uname -r`;
if ($release) {
chomp($release);
info(0, "Will use version of current running kernel ($release)\n",
"Make sure this is OK\n");
$ENV{'RELEASE'} = $release;
} else {
my $error = error(
"And can't determine running kernel's version either!\n");
return "ERROR" if $error && $error eq "ERROR";
}
}
return $ENV{'RELEASE'} if $ENV{'RELEASE'};
} # end sub kernel_version_check
## This checks lib/modules/$version for rd.o, ext2.o, floppy.o
## Perhaps just extra stuff, this could be made real fancy, too.
#@@warn_about_module_dependencies($ENV{'RELEASE'});
############################
##### READ IN CONTENTS FILE
############################
## Uses info, error, cf_warn, make_link_absolute, make_link_relative,
## cf_die, must_be_abs, replaced_by, yard_glob
## REQUIRES $contents_file
sub read_contents_file {
my ($contents_file, $mnt) = @_;
my $error;
# It's a good idea to clear the text buffer in the verbosity box
$text_insert->backward_delete($text_insert->get_length());
# Need to know whether genext2fs is being used
my $fs_type = (split(/\s/,$main::makefs))[0];
# If the template changes it is time to clear all the values.
# Delete devices table.
if ( ($contents_file_tmp && $contents_file_tmp ne $contents_file) or
$fs_type eq "genext2fs" ) {
undef %Included;
undef %replaced_by;
undef %links_to;
undef %is_module;
undef %hardlinked;
undef %strippable;
undef %lib_needed_by;
undef @Libs;
}
$contents_file_tmp = $contents_file;
# Open DEVICE_TABLE
if ( $fs_type eq "genext2fs" ) {
unlink("$mnt/device_table.txt") if -e "$mnt/device_table.txt";
system "rm -rf $mnt/loopback";
#<path> <type> <mode> <uid> <gid> <major> <minor> <start><inc><count>
# /dev is always needs to be made automatically
open(DEVICE_TABLE, ">$mnt/device_table.txt") or
($error = error("$mnt/device_table.txt: $!"));
return "ERROR"if $error && $error eq "ERROR";
print DEVICE_TABLE
"# <path>\t<type>\t<mode>\t<uid>\t<gid>\t<major>\t<minor>" .
"\t<start>\t<inc>\t<count>\n";
print DEVICE_TABLE "/dev\t\td\t0755\t-\t-\t-\t-\t-\t-\t-\n";
}
info(0, "\n\nPASS 1: Reading $contents_file");
info(0, "\n");
open(CONTENTS, "<$contents_file") or
($error = error("$contents_file: $!"));
return "ERROR"if $error && $error eq "ERROR";
my($line);
LINE: while (defined($line = <CONTENTS>)) {
my(@files);
$cf_line++;
chomp $line;
$line =~ s/[\#%].*$//; # Kill comments
next if $line =~ /^\s*$/; # Ignore blank/empty line
$line =~ s/^\s+//; # Delete leading/trailing whitespace
$line =~ s/\s+$//;
# If genext2fs is being used we want to grab the values for
# devices and process them individually, globbing if necessary,
# and appending the changes to the device table. --freesource
if ( $fs_type eq "genext2fs" ) {
# If a device is found on the same line with a non-device(s)
# the non-device(s) is sent on its merry way.
if ( $line =~ m,
(?<![\w\d\+-]) # can have \s before
/dev(?![\w\d\+-]+?) # match /dev
,x ) {
if ( $line !~ m,<=|->, ) { # avoid repeats
my ($expr, $tmp_line);
for $expr (split(' ', $line)) {
if ( $expr && $expr =~ m,^/dev$|^/dev/, ) {
# Do something here
my(@globbed) = yard_glob($expr);
if ($#globbed == -1) {
cf_warn($contents_file, $expr,
"Warning: No files matched $expr");
} elsif (!($#globbed == 0 and
$globbed[0] eq $expr)) {
info(1, "Expanding $expr to @globbed\n");
}
# make device table
device_table($mnt,@globbed);
}
else {
if ( $tmp_line ) {
$tmp_line = $tmp_line . " $expr";
}
else {
$tmp_line = $expr;
}
}
}
if ( $tmp_line ) {
$line = $tmp_line;
}
else {
next LINE;
}
}
}
}
if ($line =~ /->/) { ##### EXPLICIT LINK
if ($line =~ /[\*\?\[]/) {
cf_warn($line, "Can't use wildcards in link specification!");
next LINE;
}
## I decided to switch this from ($file,$link) to ($link,$file)
## to make this more intuitive for users so something like
## ls -l /bin/sh which ='s /bin/sh -> /bin/bash is literal
## .. before it was backwards. --freesource
my($link, $file) = $line =~ /^(\S+)\s*->\s*(\S+)\s*$/;
if (!defined($link)) {
cf_warn($line, "Can't parse this link");
next LINE;
}
##### The '->' supersedes file structure on the disk, so don't
##### call include_file until pass two after all explicit links
##### have been seen.
## find_file_in_path($file) changed to find_file_in_path($link)
## the downside to this is that you can't create a fictional
## link on the left-hand side, but that can be fixed, the upside
## is that full dists can be created.
my $abs_link = find_file_in_path($link);
my $abs_file = find_file_in_path($file);
#### Have to be careful here. Record the rel link for use
#### in setting up the root fs, but use the abs_link in @files
#### so next loop gets any actual files.
## Basically, what is happening here is if the $link on the left
## is absolute, include_file will discover any symlink
## from extra_links completely ignoring what is specified by $file.
## If $link doesn't exist either absolutely or
## relatively, it is assumed that $file needs to exist, then
## a symlink is built from $link -> $file (ln -sf) .. where
## $link can either exist (will be found) or can be fictional.
## --freesource
my $abs_link_link = make_link_absolute($abs_link, $link);
my($rel_link) = make_link_relative($abs_link, $link);
# This allows user defined ln -sf when the $file actually exists
# and its absolute path is found. This will complain if
# $abs_file isn't real, and this was what was intended.
my $abs_file_file = make_link_absolute($abs_file, $file);
my $rel_file = make_link_relative($abs_file, $file);
# Only do this if $file doesn't exist
$Included{$abs_link} = 1 if $abs_link; # && !$abs_file;
# This is the revised link specification which is more
# intuitive and allows user-defined links.
# The file can be fictional. $abs_file_file means there is
# something on the right side. Generally, we want to use
# the file on the right as the real file. --freesource
if ( $abs_file_file ) {
if ( ! $rel_link ) {
if ( $abs_link ) {
$links_to{$abs_link} = $abs_file_file;
info(1, "$line links $abs_link to $abs_file_file\n");
}
# The left is fictional will create relative to /
# or doesn't exist in PATH
else {
if ( !$rel_file ) {
$links_to{$link} = $abs_file_file;
$user_defined_link{$link} = 1;
info(1, "$line links $link to $abs_file_file\n");
}
else {
$links_to{$link} = $rel_file;
$user_defined_link{$link} = 1;
info(1, "$line links $link to $rel_file\n");
$abs_file_file = $rel_file;
}
}
}
else {
$links_to{$abs_link_link} = $file if $abs_link_link;
info(1, "$line links $abs_link_link to $file\n")
if $abs_link_link;
}
}
@files = ($abs_file_file);
} elsif ($line =~ /<=/) { ##### REPLACEMENT SPEC
$error = cf_die($contents_file, $line,
"Can't use wildcard in replacement specification") if
$line =~ /[\*\?\[]/;
return "ERROR" if $error && $error eq "ERROR";
my($file, $replacement) = $line =~ /^(\S+)\s*<=\s*(\S+)\s*$/;
#$replacement = "$main::global_yard/$replacement";
if (!defined($replacement)) {
cf_warn($contents_file, $line,
"Can't parse this replacement spec");
next LINE;
} else {
must_be_abs($file);
(-d $file) and cf_warn($contents_file, $line,
"left-hand side can't be directory");
my($abs_replacement) = find_file_in_path($replacement,$main::global_yard);
if (!(defined($abs_replacement) and -e $abs_replacement)) {
cf_warn($contents_file, $line, "Can't find $replacement");
} elsif ($replacement =~ m|^/dev/(?!null)|) {
# Allow /dev/null but no other devices
cf_warn($contents_file, $line,
"Can't replace a file with a device");
} else {
$replaced_by{$file} = $abs_replacement;
$Included{$file} = 1;
}
next LINE;
} # End of replacement spec
} elsif ($line =~ /(<-|=>)/) {
cf_warn($contents_file, $line, "Not a valid arrow.");
next LINE;
} else {
@files = ();
my($expr);
for $expr (split(' ', $line)) {
my(@globbed) = yard_glob($expr);
if ($#globbed == -1) {
cf_warn($contents_file, $expr,
"Warning: No files matched $expr");
} elsif (!($#globbed == 0 and $globbed[0] eq $expr)) {
info(1, "Expanding $expr to @globbed\n");
}
push(@files, @globbed);
}
}
my($file);
FILE: foreach $file (@files) {
if ($file =~ m|^/|) { ##### Absolute filename
# This complains for non-existent $files for some reason.
# like /dev/pilot, but can't replicate
if (-l $file and readlink($file) =~ m|^/proc/|) {
info(1, "Recording proc link $file -> ", readlink($file),
"\n");
$Included{$file} = 1;
$links_to{$file} = readlink($file);
} elsif (-e $file) {
$Included{$file} = 1;
} elsif ($file =~ m|^$::oldroot/(.*)$|o and -e "/$1") {
### Don't complain about links to files that will be mounted
### under $oldroot, the hard disk root mount point.
next FILE;
} else {
cf_warn($contents_file, $line,
"Absolute filename $file doesn't exist");
}
} else { ##### Relative filename
my($abs_file) = find_file_in_path($file);
if ($abs_file) {
info(1, "Found $file at $abs_file\n");
$Included{$abs_file} = 1;
} else {
cf_warn($contents_file, $line,
"Didn't find $file anywhere in path");
}
}
} # End of FILE loop
} # End of LINE loop
if ( $fs_type eq "genext2fs" ) {
close(DEVICE_TABLE);
}
info(0, "\nDone with $contents_file\n\n");
close(CONTENTS) or ($error = error("close on $contents_file: $!"));
return "ERROR"if $error && $error eq "ERROR";
} # end read_contents_file
# Uses include_file
sub extra_links {
my ($contents_file) = @_;
info(0, "PASS 2: Picking up extra files from links...\n");
for (keys %Included) {
# watch for "" - freesource
include_file($contents_file, $_) if $_ ne "";
}
%Included = (%Included, %user_defined_link); # --freesource
info(0, "Done.\n\n");
}
sub library_dependencies {
my ($contents_file) = @_;
my $error;
info(0, "PASS 4: Checking library dependencies...\n");
info(1, "(Ignore any 'statically linked' messages.)\n");
# Normal file X: X in %Included.
# X -> Y: X in %links_to, Y in %Included
# X <= Y: X in %Included and %replaced_by
my($file);
foreach $file (keys %Included) {
##### Use replacement file if specified
$file = $replaced_by{$file} if defined($replaced_by{$file});
##### Skip links (target will be checked)
next if defined($links_to{$file}); # Symbolic (declared)
next if -l $file; # Symbolic (on disk)
my($file_line) = `file $file`;
##### See whether it's strippable and make a note.
##### This will prevent us from wasting time later running objcopy
##### on binaries that are already stripped.
if ($file_line =~ m/not stripped/) {
$strippable{$file} = 1;
}
##### See whether it's a module and mark the info for later
##### so that we strip it correctly.
if ($file_line =~ m/relocatable/) {
info(1, "Marking $file as a module\n");
$is_module{$file} = 1;
} elsif ($file_line =~ m/shared object/) {
##### Any library (shared object) seen here was explicitly
##### included by the user.
push(@{$lib_needed_by{$file}}, "INCLUDED BY USER");
}
if (-f $file and -B _ and -x _ and $file_line =~ /executable/) {
##### EXECUTABLE LOADABLE BINARY
##### Run ldd to get library dependencies.
my $line;
foreach $line (`ldd $file`) {
my($lib) = $line =~ / => (\S+)/;
next unless $lib;
my($abs_lib) = $lib;
if ($lib =~ /not found/) {
warning "File $file needs library $lib," .
" which does not exist!";
} else {
##### Right-hand side of the ldd output may be
##### a symbolic link.
##### Resolve the lib absolutely.
##### include_file follows links and adds each file;
##### the while loop makes sure we get the last.
$abs_lib = $lib;
include_file($contents_file, $lib);
while (1) {
if (defined($links_to{$abs_lib})) {
$abs_lib = make_link_absolute($abs_lib,
$links_to{$abs_lib});
}
if (defined($replaced_by{$abs_lib})) {
$abs_lib = $replaced_by{$abs_lib};
}
last unless -l $abs_lib;
my($link) = readlink($abs_lib) or
($error = error("readlink($abs_lib): $!"));
return "ERROR"if $error && $error eq "ERROR";
$abs_lib = make_link_absolute($abs_lib, $link);
}
}
if (!defined($lib_needed_by{$abs_lib})) {
info(0, "\t$abs_lib\n");
}
push(@{$lib_needed_by{$abs_lib}}, $file);
}
}
}
####################################
##### Check libraries and loader(s)
####################################
(@Libs) = keys %lib_needed_by;
my($seen_ELF_lib, $seen_AOUT_lib);
my(%full_name);
if (@Libs) {
info(1, "\nYou need these libraries:\n");
my($lib);
foreach $lib (@Libs) {
my($size) = bytes_to_K(-s $lib);
my($line) = " " x 15;
my($file_output) = `file $lib`;
if ($file_output =~ m/symbolic link/) {
$error = error(
"Yiiiiii, library file $lib is a symbolic link!\n",
"This shouldn't happen!\n",
"Please report this error(to the Yard author\n");
return "ERROR"if $error && $error eq "ERROR";
}
my($lib_type) = $file_output =~ /:\s*(ELF|Linux)/m;
##### All libraries are strippable
$strippable{$lib} = 1;
info(1, "$lib (type $lib_type, $size K) needed by:\n");
my($binary);
for $binary (sort map(basename($_), @{$lib_needed_by{$lib}})) {
if (length($line) + length($binary) > 78) {
info(1, $line, "\n");
$line = " " x 15;
}
$line .= $binary . " ";
}
info(1, $line, "\n") if $line;
if (!($seen_ELF_lib and $seen_AOUT_lib)) {
##### Check library to make sure we have the right loader.
##### (A better way is to do "ldconfig -p" and parse the output)
##### Strings from /usr/lib/magic of file 3.19
if (!defined($lib_type)) {
$error = error(
"Didn't understand `file` output for $lib:\n",
`file $lib`, "\n");
return "ERROR"if $error && $error eq "ERROR";
} elsif ($lib_type eq 'ELF') {
$seen_ELF_lib = 1;
} elsif ($lib_type eq 'Linux') { # ie, a.out
$seen_AOUT_lib = 1;
}
}
##### See if some other version of this library file is
##### being loaded, eg libc.so.3.1.2 and libc.so.5.2.18.
##### Not an error, but worth warning the user about.
my($lib_stem) = basename($lib) =~ /^(.*?\.so)/;
if (defined($full_name{$lib_stem})) {
warning "You need both $lib and $full_name{$lib_stem}\n",
"Check log file for details.\n";
} else {
##### eg, $full_name{"libc.so"} = "/lib/libc.so.5.2.18"
$full_name{$lib_stem} = $lib;
}
}
}
info(1, "\n");
if ($seen_ELF_lib) {
# There's no official way to get the loader file, AFAIK.
# This expression should get the latest version, and Yard will grab any
# hard-linked file.
my($ld_file) = (yard_glob("/lib/ld-linux.so.?"))[-1]; # Get last one
if (defined($ld_file)) {
info(1, "Adding loader $ld_file for ELF libraries\n");
include_file($contents_file, $ld_file);
} else {
info(0, "Can't find ELF loader /lib/ld-linux.so.?");
}
}
if ($seen_AOUT_lib) {
# Was: yard_glob("/lib/ld.so*")
# Same as above, but ld.so seems to have no version number appended.
my($ld_file);
foreach $ld_file (yard_glob("/lib/ld.so")) {
info(1, "Adding loader $ld_file for a.out libraries\n");
include_file($contents_file, $ld_file);
}
}
info(0, "Done\n\n");
} # end sub library_dependencies
sub hard_links {
info(0, "PASS 3: Recording hard links...\n");
##### Finally, scan all files for hard links.
my($file);
foreach $file (keys %Included) {
next if $links_to{$file} or $replaced_by{$file};
##### $file is guaranteed to be absolute and not symbolically linked.
##### Record hard links on plain files
if (-f $file) {
my($dev, $inode, $mode, $nlink) = stat(_);
if ($nlink > 1) {
info(1,"$file is hardlinked\n");
$hardlinked{$file} = "$dev/$inode";
}
}
}
info(0, "Done.\n\n");
} # end sub hard_links
##########################
# freesource added stripped file size check.
sub space_check {
info(0, "Checking space needed.\n");
# For libs [obj_count 1 = "all" 0 = "debug"]
my ($fs_size, $strip_lib, $strip_bin,
$strip_module, $obj_count, $tmp) = @_;
my($total_bytes) = 0;
my(%counted);
# %Included synopsis
# /path/file (1|symlink)
# %replaced_by /path/file /path/file .. <=
# %links_to /path/file-symnlink actual-file
# %hardlinked /path/file dev/inode -> stat()
my ($file);
foreach $file (keys %Included) {
my $not_stripped = `file $file`;
my $filename = basename($file);
my($replacement, $devino);
if ($replacement = $replaced_by{$file}) {
## strip count for replace
## Check for libraries %lib_needed_by, modules %is_module,
## and everything else if strippable, and strip is chosen
## and for lib two states are possible
##### Use the replacement file instead of this one. In the
##### future, improve this so that replacement is resolved WRT
##### %links_to
if ($strip_lib) {
my $not_stripped = `file $file`;
if ($not_stripped =~ m,not stripped,) {
if ($obj_count == 0) {
if ($lib_needed_by{$replacement}) {
my $tmp_strip = "$tmp/" . basename($replacement);
sys("objcopy --strip-debug $replacement $tmp_strip");
info(1,
"Counting bytes of replacement $replacement",
" (STRIPPED DEBUG)\n");
$total_bytes += bytes_allocated($tmp_strip);
unlink($tmp_strip);
next;
}
}
elsif ($obj_count == 1) {
if ($lib_needed_by{$replacement}) {
my $tmp_strip = "$tmp/" . basename($replacement);
sys("objcopy --strip-debug $replacement $tmp_strip");
info(1,
"Counting bytes of replacement $replacement",
" (STRIPPED ALL)\n");
$total_bytes += bytes_allocated($tmp_strip);
unlink($tmp_strip);
next;
}
}
}
}
if ($strip_module) {
my $not_stripped = `file $replacement`;
if ($not_stripped =~ m,not stripped,) {
if ($is_module{$replacement}) {
my $tmp_strip = "$tmp/" . basename($replacement);
sys("objcopy --strip-debug $replacement $tmp_strip");
info(1,
"Counting bytes of replacement $replacement",
" (STRIPPED DEBUG)\n");
$total_bytes += bytes_allocated($tmp_strip);
unlink($tmp_strip);
next;
}
}
}
if ($strip_bin) {
my $not_stripped = `file $replacement`;
if ($not_stripped =~ m,not stripped,) {
my $tmp_strip = "$tmp/" . basename($replacement);
sys("objcopy --strip-all $replacement $tmp_strip");
info(1, "Counting bytes of replacement $replacement",
" (STRIPPED ALL)\n");
$total_bytes += bytes_allocated($tmp_strip);
unlink($tmp_strip);
next;
}
}
info(1, "Counting bytes of replacement $replacement\n");
$total_bytes += bytes_allocated($replacement);
} elsif (-l $file or $links_to{$file}) { ## no strip
##### Implicit or explicit symbolic link. Only count link size.
##### I don't think -l test is needed.
my($size) = (-l $file) ? length(readlink($file))
: length($links_to{$file});
info(1, "$file (link) size $size\n");
$total_bytes += $size;
} elsif ($devino = $hardlinked{$file}) {
##### This file is hard-linked to another. We don't necessarily
##### know that the others are going to be in the file set.
##### Count the first and mark the dev/inode so we don't count
##### it again. .. pretty cool
if (!$counted{$devino}) { ## 1 strip for hardlinked file
if ($strip_bin) {
my $not_stripped = `file $file`;
if ($not_stripped =~ m,not stripped,) {
my $tmp_strip = "$tmp/" . basename($file);
sys("objcopy --strip-all $file $tmp_strip");
info(1, "Counting ", -s $tmp_strip,
" bytes of hard-linked file $tmp_strip",
" (STRIPPED ALL)\n");
$total_bytes += bytes_allocated($tmp_strip);
unlink($tmp_strip);
next;
}
}
info(1, "Counting ", -s _,
" bytes of hard-linked file $file\n");
$total_bytes += bytes_allocated($file);
$counted{$devino} = 1;
} else {
info(1, "Not counting bytes of hard-linked file $file\n");
}
} elsif (-d $file) { ## no strip
$total_bytes += $INODE_SIZE;
info(1, "Directory $file = ", $INODE_SIZE, " bytes\n");
} elsif ($file =~ m|^/proc/|) { ## no strip
##### /proc files screw us up (eg, /proc/kcore), and there's no
##### Perl file test that will detect them otherwise.
next;
} elsif (-f $file) { ##
## At this point hardlinked, dirs, replaced_by and /proc have
## been filtered out. If strip is chosen
## check for libraries (%lib_needed_by), modules (%is_module),
## and everything else if strippable. For lib two states are
## posible
##### Count space for plain files
if ($strip_lib) {
my $not_stripped = `file $file`;
if ($not_stripped =~ m,not stripped,) {
if ($obj_count == 0) {
if ($lib_needed_by{$file}) {
my $tmp_strip = "$tmp/" . basename($file);
sys("objcopy --strip-debug $file $tmp_strip");
info(1, "$file size ",
-s $tmp_strip, " (LIB STRIPPED DEBUG)\n");
$total_bytes += bytes_allocated($tmp_strip);
unlink($tmp_strip);
next;
}
}
elsif ($obj_count == 1) {
if ($lib_needed_by{$file}) {
my $tmp_strip = "$tmp/" . basename($file);
sys("objcopy --strip-debug $file $tmp_strip");
info(1, "$file size ",
-s $tmp_strip, " (LIB STRIPPED ALL)\n");
$total_bytes += bytes_allocated($tmp_strip);
unlink($tmp_strip);
next;
}
}
}
}
if ($strip_module) {
my $not_stripped = `file $file`;
if ($not_stripped =~ m,not stripped,) {
if ($is_module{$file}) {
my $tmp_strip = "$tmp/" . basename($file);
sys("objcopy --strip-debug $file $tmp_strip");
info(1, "$file size ",
-s $tmp_strip, " (MODULE STRIPPED)\n");
$total_bytes += bytes_allocated($tmp_strip);
unlink($tmp_strip);
next;
}
}
}
if ($strip_bin) {
my $not_stripped = `file $file`;
if ($not_stripped =~ m,not stripped,) {
my $tmp_strip = "$tmp/" . basename($file);
sys("objcopy --strip-all $file $tmp_strip");
info(1, "$file size ",
-s $tmp_strip, " (BIN STRIPPED)\n");
$total_bytes += bytes_allocated($tmp_strip);
unlink($tmp_strip);
next;
}
}
info(1, "$file size ", -s $file, "\n");
$total_bytes += bytes_allocated($file);
}
}
# Libraries are already included in the count
info(0, "Total space needed is ", bytes_to_K($total_bytes), " Kbytes\n");
## One interesting thought: This isn't looking at the penalty for
## ext2 filesystem info .. and other filesystems may be allowed in the
## future. 8192 inodes == 1.63% penalty or at iso9660
if (bytes_to_K($total_bytes) > $fs_size) {
info(0, "This is more than the $fs_size Kbytes allowed.\n");
return;
}
info(0, "\n");
} # end sub space_check
########################
##### Create filesystem
########################
sub create_filesystem {
my ($filename, $fs_size, $mnt, $strip_lib,
$strip_bin, $strip_module, $obj_count) = @_;
$device = "$mnt/$filename";
$mount_point = "$mnt/loopback";
my $file;
my $error;
my $fs_type = (split(/\s/,$main::makefs))[0];
info(0, "Creating root filesystem with $fs_type.\n");
info(0, "Description: $fs_size K root file system\n");
info(0, "Where: $device\n");
# Maybe other fs will be represented in the future, but genext2fs is all
# that exists now for non-root users. --freesource
if ( $fs_type ne "genext2fs" ) {
sync();
sys("dd if=/dev/zero of=$device bs=1k count=$fs_size");
sync();
if (-f $device) {
##### If device is a plain file, it means we're using some
##### loopback device. Use -F switch in mke2fs so it
##### won't complain.
## Options here can be changed.
## Originally, this was -b 1024 switched with the inode approach.
if (sys("$main::makefs $device $fs_size") !~
/^0$/ ) {
$error = error("Cannot $fs_type filesystem.\n");
return "ERROR" if $error && $error eq "ERROR";
}
} else {
if (sys("$main::makefs $device $fs_size") !~
/^0$/ ) {
$error = error("Cannot $fs_type filesystem.\n");
return "ERROR" if $error && $error eq "ERROR";
}
}
}
if (!-d $mount_point) {
return "ERROR" if errmk(sys("mkdir $mount_point")) == 2;
}
if ( $fs_type ne "genext2fs" ) {
return "ERROR" if errm(mount_device($device,$mount_point)) == 2;
##### lost+found on a ramdisk is pointless
sys("rm -rf $mount_point/lost+found");
sync();
}
##### Setting up the file structure is tricky. Given a tangled set
##### of symbolic links and directories, we have to create the
##### directories, symlinks and files in the right order so that no
##### dependencies are missed.
##### First, create directories for symlink targets that are supposed
##### to be directories. Symlink targets can't be superseded so
##### sorting them by path length should give us a linear ordering.
info(0, "Creating directories for symlink targets\n");
for $file (sort { path_length($a) <=> path_length($b) }
keys %links_to) {
my($link_target) = $links_to{$file};
my($abs_file) = make_link_absolute($file, $link_target);
if (-d $abs_file) {
my($floppy_file) = $mount_point . $abs_file;
my($newdir);
foreach $newdir (mkpath($floppy_file)) {
info(1, "\tCreating $newdir as a link target for $file\n");
}
}
}
##### Next, set up actual symlinks, plus any directories that weren't
##### created in the first pass. Sorting by path length ensures that
##### parent symlinks get set up before child traversals.
info(0, "Creating symlinks and remaining directories.\n");
for $file (sort { path_length($a) <=> path_length($b) }
keys %Included) {
my($target);
if (defined($target = $links_to{$file})) {
# When no directory is specified for a fictional link,
# assume it is in the same directory as the file --freesource
if ( $file !~ m,^/, ) {
if ( find_file_in_path($target) ) {
$file = dirname(find_file_in_path($target)) . "/$file";
}
else {
$file = dirname($target) . "/$file";
}
}
my($floppy_file) = $mount_point . $file;
mkpath(dirname($floppy_file));
info(1, "\tLink\t$floppy_file -> $target\n");
symlink($target, $floppy_file) or
($error = error("symlink($target, $floppy_file): $!\n"));
return "ERROR"if $error && $error eq "ERROR";
delete $Included{$file}; # Get rid of it so next pass doesn't copit
} elsif (-d $file) {
my($floppy_file) = $mount_point . $file;
my($newdir);
foreach $newdir (mkpath($floppy_file)) {
info(1, "\tCreate\t$newdir\n");
}
delete $Included{$file}; # Get rid of it so next pass doesn't copy it
}
}
##### Tricky stuff is over with, now copy the remaining files.
info(0, "\nCopying files to $device\n");
my(%copied);
while (($file) = each %Included) {
my($floppy_file) = $mount_point . $file;
my($replacement);
if (defined($replacement = $replaced_by{$file})) {
$file = $replacement;
}
if ($file =~ m|^/proc/|) {
##### Ignore /proc files
next;
} elsif (-f $file) {
##### A normal file.
## File::Path likes to die when the device runs out of space,
## something which will have to be worked on. -- freesource
mkpath(dirname($floppy_file));
##### Maybe a hard link.
my($devino, $firstfile);
if (defined($devino = $hardlinked{$file})) {
##### It's a hard link - see if the linked file is already
##### on the root filesystem.
if (defined($firstfile = $copied{$devino})) {
##### YES - just hard link it to existing file.
info(1, "Hard linking $floppy_file to $firstfile\n");
sys("ln $firstfile $floppy_file");
next; # Skip copy
} else {
##### NO - copy it.
$copied{$devino} = $floppy_file;
}
}
info(1, "$file -> $floppy_file\n");
copy_strip_file($file, $floppy_file, $obj_count, $strip_lib,
$strip_bin, $strip_module);
} elsif (-d $file) {
##### A directory.
info(1, "Creating directory $floppy_file\n");
mkpath($floppy_file);
} elsif ($file eq '/dev/null' and
$floppy_file ne "$mount_point/dev/null") { # I hate this
info(1, "Creating empty file $floppy_file\n");
mkpath(dirname($floppy_file));
sys("touch $floppy_file");
} else {
##### Some special file.
info(1, "Copying special $file to $floppy_file\n");
mkpath(dirname($floppy_file));
# The 'R' flag here allows cp command to handle devices and FIFOs.
sys("cp -dpR $file $floppy_file");
}
}
info(0, "\nFinished creating root filesystem.\n");
if (@Libs) {
info(0, "Re-generating /etc/ld.so.cache on root fs.\n");
info(1, "Ignore warnings about missing directories\n");
sys("ldconfig -v -r $mount_point");
}
if ( $fs_type ne "genext2fs" ) {
## Probably will want to umount here
return "ERROR" if errum(sys("umount $mount_point")) == 2;
}
# This is fun.
else {
# The -D option is unique to the newest unreleased version of
# genextfs modified by BusyBox maintainer Erick Andersen
# August 20, 2001.
my $device_table = "$mnt/device_table.txt";
if (
sys("/usr/lib/bootroot/$main::makefs -b $fs_size -d $mount_point -D $device_table $device") !~
/^0$/ ) {
$error = error("Cannot $fs_type filesystem.\n");
return "ERROR" if $error && $error eq "ERROR";
}
}
info(0, "\nDone making the root filesystem. $Warnings warnings.\n",
"$device is now umounted from $mount_point\n\n");
#info(0, "All done!\n");
#info(0, "You can run more tests with the UML kernel\n",
# "or construct a distribution by using this root\n",
# "filesystem with a boot method.");
} # end sub create_filesystem
#######################################
##### Utility subs for make_root_fs.pl
#######################################
##### Add file to the file set. File has to be an absolute filename.
##### If file is a symlink, add it and chase the link(s) until a file is
##### reached.
sub include_file {
my($contents_file, $file) = @_;
my $error;
must_be_abs($file);
if (onto_proc_filesystem($file)) {
info(1, "File $file points into proc filesystem -- not pursued.\n");
return;
}
$Included{$file} = 1;
##### If we have links A -> B -> C -> D -> E
##### on disk and A -> D is set explicitly, then we pick up
##### files A and D in pass 1, and E on pass 2.
while (!defined($links_to{$file}) and !defined($replaced_by{$file})
and -l $file) {
##### SYMBOLIC LINK on disk, not overridden by explicit link or
##### replacement. Relativize the link for use later, but also
##### check and resolve the target so it gets onto the rescue disk.
my($link) = readlink($file) or ($error = error("readlink($file): $!"));
return "ERROR"if $error && $error eq "ERROR";
my($rel_link) = make_link_relative($file, $link);
$links_to{$file} = $rel_link;
my($abs_target) = make_link_absolute($file, $link);
if (onto_proc_filesystem($abs_target)) {
info(1, "$file points to $abs_target, on proc filesystem\n");
last;
}
if (!$Included{$abs_target}) {
info(1, "File $file is a symbolic link to $link\n");
#info(1, "\t(which resolves to $abs_target),\n"
# if $link ne $abs_target);
info(1, "\twhich was not included in $contents_file.\n");
if (-e $abs_target) {
info(1, "\t ==> Adding it to file set.\n\n");
$Included{$abs_target} = $file;
} else {
info(0, "\t ==> $abs_target does not exist. Fix this!\n");
}
}
$file = $abs_target; # For next iteration of while loop
}
}
##### More informative versions of warn and die, for the contents file
sub cf_die {
my($contents_file, $line, @msgs) = @_;
info(0, "$contents_file($cf_line): $line\n");
foreach (@msgs) { info(0, "\t$_\n"); }
my $output = join("\n",@msgs);
error_window("gBootRoot: ERROR: ", $output);
return "ERROR";
}
sub cf_warn {
my($contents_file, $line, @msgs) = @_;
info(0, "$contents_file($cf_line): $line\n");
$Warnings++;
foreach (@msgs) { info(0, "\t$_\n"); }
}
## Modified for user chosen defaults
# Copy a file, possibly stripping it. Stripping is done if the file
# is strippable and stripping is desired by the user, and if the
# objcopy program exists.
sub copy_strip_file {
my($from, $to, $strip_objfiles,
$strip_lib, $strip_bin, $strip_module) = @_;
my $error;
# Need to know whether genext2fs is being used
my $fs_type = (split(/\s/,$main::makefs))[0];
if ($strippable{$from}) {
# Copy it stripped
if ($strip_lib) {
if (defined($lib_needed_by{$from})) {
# It's a library
if ($strip_objfiles == 1) {
info(1, "Copy/stripping library $from to $to\n");
sys("$objcopy --strip-all -p $from $to");
}
elsif ($strip_objfiles == 0) {
info(1, "Copy/stripping library $from to $to\n");
sys("$objcopy --strip-debug -p $from $to");
}
}
}
if ($strip_module) {
if (defined($is_module{$from})) {
info(1, "Copy/stripping module $from to $to\n");
sys("$objcopy --strip-debug -p $from $to");
}
}
if ($strip_bin) {
if (!defined($is_module{$from}) &&
!defined($lib_needed_by{$from})) {
# It's a binary executable
info(1, "Copy/stripping binary executable $from to $to\n");
sys("$objcopy --strip-all -p $from $to");
}
}
else { # fallback just in case
# Normal copy, no strip
if ( $from !~ m,/Replacements/, ) {
info(1, "Copying $from to $to\n");
sys("cp -a $from $to");
}
else {
if ( !-l $from ) {
info(1, "Copying $from to $to\n");
sys("cp -a $from $to");
}
else {
$from = readlink($from);
info(1, "Copying $from to $to\n");
sys("cp -a $from $to");
}
}
}
# Copy file perms and owner
## If non-root users are using genext2fs then it is safe to
## chmod, but not to chown. --freesource
my($mode, $uid, $gid);
(undef, undef, $mode, undef, $uid, $gid) = stat $from;
my $from_base = basename($from);
if ( $> == 0 || $fs_type eq "genext2fs" ) {
if ( $> == 0 ) {
chown($uid, $gid, $to) or ($error =
error("chown: $! \($from_base\)\n"));
return "ERROR"if $error && $error eq "ERROR";
}
chmod($mode, $to) or ($error =
error("chmod: $! \($from_base\)\n"));
return "ERROR"if $error && $error eq "ERROR";
}
## else {
## sys("$main::sudo chown $uid $gid $to");
## sys("$main::sudo chmod $mode $to");
## }
}
else {
# Normal copy, no strip
if ( $from !~ m,/Replacements/, ) {
info(1, "Copying $from to $to\n");
sys("cp -a $from $to");
}
else {
if ( !-l $from ) {
info(1, "Copying $from to $to\n");
sys("cp -a $from $to");
}
else {
$from = readlink($from);
info(1, "Copying $from to $to\n");
sys("cp -a $from $to");
}
}
}
}
##### End of make_root_fs
########################################################
##
## YARD_UTILS.PL -- Utilities for the Yard scripts.
##
########################################################
# Get device number of /proc filesystem
## not a sub
my($proc_dev) = (stat("/proc"))[0];
sub info {
my($level, @msgs) = @_;
if ($level != 3) {
print LOGFILE @msgs;
}
$level = 0 if $level == 3;
my $output = join("",@msgs);
if ($verbosity >= $level) {
if ($text_insert) {
$text_insert->freeze();
if ($level == 0) {
$text_insert->insert( undef, $blue, undef, $output );
}
elsif ($level == 1) {
$text_insert->insert( undef, $red, undef, $output );
}
$text_insert->thaw();
$logadj->set_value($logadj->upper - $logadj->page_size);
while (Gtk->events_pending) { Gtk->main_iteration; }
}
}
}
## This will produce red.
sub error {
print LOGFILE "Error: ", @_;
info(0, "Error: ", @_);
error_window("gBootRoot: ERROR: ", @_);
return "ERROR";
}
sub start_logging_output {
my ($yard_temp,$verb_level) = @_;
my $logfile;
$verbosity = $verb_level;
if (defined($yard_temp) and $yard_temp) {
$logfile = $yard_temp;
}
# ERRORCHECK
## If logfile doesn't open in /tmp there is some type of fatal problem.
open(LOGFILE, ">>$logfile") or error("open($logfile): $!\n");
# &::verbosity_box() if !visible $verbosity_window;
info(1, "Logging output to $logfile\n")
}
##### Same as system() but obeys $verbosity setting for both STDOUT
##### and STDERR.
sub sys {
my $error;
# when using sys on yard_chrooted_tests
my $dont = pop @_;
if ($dont ne "TESTING") {
push @_, $dont;
}
open(SYS, "@_ 2>&1 |") or ($error = error("open on sys(@_) failed: $!"));
return "ERROR"if $error && $error eq "ERROR";
while (<SYS>) {
if ($dont ne "TESTING") {
print LOGFILE unless $_ =~ m,\/.*file\n$,;
}
if ($verbosity > 0) {
if ($dont ne "TESTING") {
info(1,$_) unless $_ =~ m,\/.*file\n$,;
}
else {
info(3,$_) unless $_ =~ m,\/.*file\n$,;
}
}
}
close(SYS) or return $?;
0; # like system()
}
# This is history, simply because the mount point is unique to
# the session, and umount is always used between stages, and
# there are checks in place for it's failure.
# Just need to add error_window.
my (%mounted, %fs_type);
sub load_mount_info {
undef %mounted;
undef %fs_type;
open(MTAB, "</etc/mtab") or die "Can't read /etc/mtab: $!\n";
while (<MTAB>) {
my($dev, $mp, $type) = split;
next if $dev eq 'none';
$mounted{$dev} = $mp;
$mounted{$mp} = $dev;
$fs_type{$dev} = $type;
}
close(MTAB);
}
sub mount_device_if_necessary {
load_mount_info();
# obviously these should be lexical to the whole package.
my ($device,$mount_point);
if (defined($mounted{$device})) {
if ($mounted{$device} eq $mount_point) {
info(0, "Device $device already mounted on $mount_point\n");
} else {
info(0, "$device is mounted \(on ", $mounted{$device}, "\)\n");
info(0, "Can't mount it under $mount_point.\n");
}
} elsif ($mounted{$mount_point} eq $device) {
info(0, "Another device \(", $mounted{$mount_point},
"\) is already mounted on $mount_point\n");
}
}
sub must_be_abs {
my($file) = @_;
# Matches / or ./ or ../
$file =~ m|^\.{0,2}/|
or info(0, "file $file must be absolute but isn't.\n");
}
sub sync {
# Parts of unix are still a black art
system("sync") and error("Couldn't sync!");
system("sync") and error("Couldn't sync!");
}
## Need to put error() checking here
## This is used for ./Replacements config_dest == /etc/yard
# find_file_in_path(file, path)
# Finds filename in path. Path defaults to @pathlist if not provided.
# If file is relative, file is resolved relative to config_dest and lib_dest.
sub find_file_in_path {
my($file, @path) = @_;
if (!@path) {
##### Initialize @pathlist if necessary
if (!@pathlist) {
@pathlist = split(':', $ENV{'PATH'});
if (defined(@::additional_dirs)) {
unshift(@pathlist, @::additional_dirs);
### Changed this to work as documented
$ENV{"PATH"} = join(":", @::additional_dirs) .
":$ENV{'PATH'}";
}
info(1, "Using search path:\n", join(" ", @pathlist), "\n");
}
@path = @pathlist;
}
if ($file) {
##### Relative filename, search for it
my($dir);
## foreach $dir (@path, $config_dest, $lib_dest
foreach $dir (@path) {
my($abs_file) = "$dir/$file";
return $abs_file if -e $abs_file;
}
# if ( !-e "$path[$#path]/$file") {
# info(1,"gBootRoot Error: Couldn't find $file\n");
# }
undef;
}
} # end find_file_in_path
# Note that this does not verify existence of the returned file.
sub make_link_absolute {
my($file, $target) = @_;
if ($target =~ m|^/|) {
$target; # Target is absolute, just return it
} else {
cleanup_link(dirname($file) . "/$target");
}
}
sub cleanup_link {
my($link) = @_;
# Collapse all occurrences of /./
1 while $link =~ s|/\./|/|g;
# Cancel occurrences of /somedir/../
# Make sure somedir isn't ".."
1 while $link =~ s|/(?!\.\.)[^/]+/\.\./|/|gx;
$link;
}
# Given an absolute file name and a symlink, make the symlink relative
# if it's not already.
sub make_link_relative {
my($abs_file, $link) = @_;
my($newlink);
if ($abs_file) {
if ($link =~ m|^/(.*)$|) {
# It's absolute -- we have to relativize it
# The abs_file guaranteed not to have any funny
# stuff like "/./" or "/foo/../../bar" already in it.
## This is an experimental solution to an annoying tendency
## for this to happen ../../../../ for files/dirs .. basically
## this occurs when called from include_file() called from
## extra_links() .. the reason for relativing links like this
## doesn't make sense.
if (!-f $link && !-d $link) {
$newlink = ("../" x path_length($abs_file)) . $1;
}
} else {
# Already relative
$newlink = $link;
}
if ($newlink) {
cleanup_link($newlink)
}
else {
return $link;
}
}
}
# I don't know if this information is worth caching.
my(%path_length);
sub path_length {
my($path) = @_;
if ($path) {
return $path_length{$path} if defined($path_length{$path});
my($length) = -1;
while ($path =~ m|/|g) { $length++ } # count slashes
$path_length{$path} = $length;
$length
}
}
sub bytes_to_K {
my($bytes) = @_;
int($bytes / 1024) + ($bytes % 1024 ? 1 : 0);
}
# Device capacity in K
sub get_device_size_K {
my($device) = @_;
my($DEV_BSIZE) = 512; # Blocksize, from sys/param.h
my($result) = pack("L", 0);
open(FD, $device) or die "open($device): $!";
my($return) = ioctl(FD, $BLKGETSIZE_ioctl, $result);
close(FD);
if ($return) {
my($bytes) = unpack("L", $result) * $DEV_BSIZE;
bytes_to_K( $bytes );
} else {
warn "Can't get size of $device";
undef;
}
}
##### Thanks to Rick Lyons for this: "If you do a BLKFLSBUF on a device, you
##### get a sync (via fsync()) as well as an invalidation of all of the
##### buffers. That is, anything stored in the buffer cache for that device
##### is tossed out and any accesses to the device needs to go to the
##### hardware. BLKFLSBUF is slightly different for /dev/ram in that no
##### dirty buffers are written (since there's no corresponding hardware),
##### and the buffer invalidation causes all of the memory allocated to the
##### ramdisk to be unlocked and made available for reuse."
sub flush_device_buffer_cache {
my($device) = @_;
my($junk) = "stuff";
open(FD, $device) && ioctl(FD, $BLKFLSBUF_ioctl, $junk);
close(FD);
}
##### This is a kludge but is probably the best way to check for
##### module support.
sub warn_about_module_dependencies {
my($version) = @_;
if (defined($version)) {
my($ramdisk_module) = "/lib/modules/$version/block/rd.o";
my($ext2fs_module) = "/lib/modules/$version/fs/ext2.o";
my($floppy_module) = "/lib/modules/$version/block/floppy.o";
if (-e $ramdisk_module) {
info(0, "***** Warning: Chosen kernel ($version) may have\n",
" modular ramdisk support. ($ramdisk_module exists)\n",
" The kernel used for the ",
" rescue disk must have BUILT-IN ramdisk support.\n");
}
if (-e $ext2fs_module) {
info(0, "***** Warning: Chosen kernel ($version) may have\n",
" modular ext2 fs support. ($ext2fs_module exists)\n",
" The kernel used for the ",
" rescue disk must have BUILT-IN ext2 fs support.\n");
}
if (-e $floppy_module) {
info(0, "***** Warning: Chosen kernel ($version) may have\n",
" modular floppy support. ($floppy_module exists)\n",
" The kernel used for the ",
" rescue disk must have BUILT-IN floppy support.\n");
}
}
}
##### This is a hack but there's no system command to return a
##### (non-running) kernel version. Returns undef if it can't
##### determine the version.
# sub kernel_version {
# my($image) = @_;
# my($str) = "phlogiston";
# my($version_start) = 1164;
# my($version_length) = 10;
# open(DATA, $image) or return(undef);
# seek(DATA, $version_start, 0);
# read(DATA, $str, $version_length);
# close(DATA);
# ###### Do careful matching in case we got some random string.
# my($version) = $str =~ /^(\d+\.\d+\.\d+)\s/;
# $version
# }
# kernel_version supplied by Andreas Degert <ad@papyrus.hamburg.com>.
# This procedure is tested with kernels v2.0.33 and v2.1.103 on i386
# Returns undef if it can't determine the version (or bails out with error)
sub kernel_version {
my($image) = @_;
my $error;
# check if we have a normal file (-f dereferences symbolic links)
if (!-f $image) {
$error = error("Kernel image ($image) is not a plain file.\n");
return "ERROR"if $error && $error eq "ERROR";
} else {
my($str) = "";
my($version_start) = "";
open(DATA, $image) or ($error = error("can't open $image.\n"));
return "ERROR"if $error && $error eq "ERROR";
# check signature of kernel image
seek(DATA, 514, 0);
read(DATA, $str, 4);
$error = error(
"Kernel image file ($image) does not have Linux kernel signature\n")
unless $str =~ "HdrS";
return "ERROR"if $error && $error eq "ERROR";
# setup header version should be 0x201
read(DATA, $str, 2);
$str = unpack("S",$str);
#info (0, "Kernel setup header version is 0x");
# 2.4.0 kernels now use Start Text 0x202 - freesource
unless ($str == 0x201
|| $str == 0x0202) {
print sprintf("%04x",$str);
print "(expected 0x201 or 0x202).\n";
}
# get ofset of version string (indirect) and read version string
seek(DATA, 526, 0);
read(DATA, $version_start, 2) or ($error = error(
"can't read from $image.\n"));
return "ERROR"if $error && $error eq "ERROR";
$version_start = unpack("S",$version_start) + 512;
seek(DATA, $version_start, 0);
read(DATA, $str, 30) or
($error = error("can't read from offset $version_start of $image.\n"));
return "ERROR"if $error && $error eq "ERROR";
close(DATA);
# Extract the version number.
# Usually this is something like 2.2.15, but because of kernel packages
# it can also be something like 2.2.15-27mdk. Don't make any assumptions
# except that beginning must be dotted triple and it's space delimited.
my($version) = $str =~ /^(\d+\.\d+\.\d+\S*)\s/;
return $version
}
}
## HISTORY
##### Eventually move this into configure since it doesn't have to be
##### done with every make_root_fs. But yard_glob would have to be
##### configured, and yard_utils.pl isn't configured. Will use for
##### other things, though.
my($glob_broken);
sub test_glob {
my($globbed) = join(' ', glob("/*"));
my($echoed) = join(' ', `echo /*`);
chop($echoed);
if ($globbed ne $echoed) {
info 0, "\n***** The glob() function seems to be broken here ",
"(Perl version $PERL_VERSION)\n",
"I'll use a slower version that works.\n";
$glob_broken = 1;
} else {
$glob_broken = 0;
}
}
##### Check glob() -- In some Perl versions it's reported not to work.
sub yard_glob {
my($expr) = @_;
## first part HISTORY
if ($glob_broken) {
my($line) = `echo $expr`;
chop($line);
my(@files) = split(' ', $line);
} else {
glob($expr);
}
} # end yard_glob
# build device table for genext2fs
sub device_table {
my ( @devices ) = @_;
my $error;
#<path> <type> <mode> <uid> <gid> <major> <minor> <start><inc><count>
# start and inc are the tricky parts with the glob so they are being
# ignored
foreach my $device (@devices) {
my ( $mode, $uid, $gid ) = (stat($device))[2,4,5];
if ( $mode ) {
$mode = sprintf( "%04o", $mode );
$mode =~ /^(\d*)(\d{4})$/;
my $type = $1;
$mode = $2;
my $maj_min = `file $device`;
# print only if it is one of these types
if ( !-l $device ) {
if ( $type == 2 ) {
$type = "c";
}
elsif ( $type == 6 ) {
$type = "b";
}
elsif ( $type == 1 ) {
$type = "p";
}
}
my ($major, $minor);
if ( $maj_min =~ /special/ ) {
$maj_min =~ m,\((\d+)/(\d+)\),;
$major = $1;
$minor = $2;
}
elsif ( $maj_min =~ /fifo/ ) {
$major = "-";
$minor = "-";
}
if ( $type eq "c" || $type eq "b" || $type eq "p" ) {
print DEVICE_TABLE
"$device\t$type\t$mode\t$uid\t$gid\t$major\t$minor" .
"\t-\t-\t-\n";
}
}
}
} # end sub device_table
sub mount_device {
my ($device,$mount_point) = @_;
my($options);
if (-f $device) {
$options = "-o loop ";
} else {
$options = "";
}
if ( $> == 0 ) {
errmk(sys("mount $options -t ext2 $device $mount_point"));
}
else {
errmk(sys("mount $mount_point"));
}
}
##### Called by make_root_fs to do basic checks on choice of $::device.
sub check_device {
my $fs_size; # @_
if (!-e $::device) {
error("Device $::device does not exist\n");
} elsif (-l $::device) {
error("$::device is a symbolic link\n",
"Please provide a real device to avoid confusion.\n");
} elsif (-f $::device) {
info(0, "Device $::device is a normal file.\n",
"Assuming loopback device is being used.\n");
} elsif (-c $::device) {
error("\$::device ($::device) is a character special file\n",
"It must be a block device\n");
} elsif (-b $::device) {
if ($::device =~ m|^/dev/[hs]d[abcd]$|) {
# error("You've specified an entire hard disk ($::device) as the device\n",
# "on which to build the root filesystem.\n";
# "Please specify a single partition.\n";
}
##### If we can check device size, make sure it isn't less than
##### what's declared.
my($max) = get_device_size_K($::device);
if (defined($max)) {
if ($max < $fs_size) {
info 0, "You've declared file system size (fs_size) to be ",
"$fs_size K\n",
"but Linux says $::device may only hold $max K\n";
if ($::device =~ m|^/dev/ram|) {
info 0, "(Increase ramdisk size";
(info 0, " in lilo.conf") if -e "/etc/lilo.conf";
info(0, ")\n");
}
exit;
}
} else {
info 0, "Warning: Yard can't determine the real size of ",
"$::device.\n",
"Assuming it's $fs_size as declared.\n",
"I hope you're not lying.\n";
}
} else {
error("I have no idea what your \$device ($::device) is!\n",
"It should either be a block special file (eg, /dev/ram or\n",
"/dev/hda2) or a plain file for use with a loopback device.\n");
}
}
# Copy a file, substituting values for variables in the file.
# First try using a configuration variable (in CFG package),
# then issue a warning.
sub copy_file_with_substitution {
my($from, $to) = @_;
open(FROM, "<$from") or error("Can't open $from: $!\n");
open(TO, ">$to") or error "$to: $!";
local($WARNING) = 0; # Turn off warnings from eval
while (<FROM>) {
## s/\$(\w+)/(eval("\$::$1")/eg;
print TO;
# took this out from space above
# or info(0, "Warning: $1 (in $from) has no known value\n")
}
close(FROM);
close(TO);
}
sub bytes_allocated {
my($file) = @_;
my($size) = -s $file;
if ($size % $EXT2_BLOCK_SIZE == 0) {
$size
} else {
(int($size / $EXT2_BLOCK_SIZE) + 1) * $EXT2_BLOCK_SIZE
}
}
sub onto_proc_filesystem {
my($file) = @_;
my($sdev) = (stat($file))[0];
my($ldev) = (lstat($file))[0];
if ($sdev && $sdev == $proc_dev) {
return $proc_dev;
}
elsif ($ldev && $ldev == $proc_dev) {
return $proc_dev;
}
}
#################
##
## CHECK_ROOT_FS
##
#################
### GLOBAL VARIABLES
my(%Termcap); # Defs from /etc/termcap
my($checked_for_getty_files); # Scalar -- have we checked getty files yet?
my(%checked); # Hash table of files we've already checked
my $login_binary;
sub warning_test {
info(0, "\n", @_);
}
sub which_tests {
my ($chosen_tests) = @_;
my ($action, $label);
# Need to know whether genext2fs is being used
my $fs_type = (split(/\s/,$main::makefs))[0];
# This is a little crude. Technically we should read /etc/conf.getty
# to make sure we're not supposed to be using a different login binary.
## Originally, this was "$mount_point/usr/bin/login" but this is assuming
## to much. It is better just to find the local version since this varies
## from distribution to distribution, and more than likely this is the
## "login" used in the mounted version, too.
## Once PATH is complete, there will be a separate check just to look at
## the non-local $mount_point PATH.
$login_binary = "$mount_point" . find_file_in_path("login");
# This goes first so we define %Termcap for use in children
## This now checks for ncurse setups, too.
return "ERROR" if errm(mount_device($device,$mount_point)) == 2;
check_termcap();
return "ERROR" if errum(sys("umount $mount_point")) == 2;
##### Here are the tests.
my $t_fstab = $chosen_tests->{30}{test_fstab};
my $t_inittab = $chosen_tests->{31}{test_inittab};
my $t_scripts = $chosen_tests->{32}{test_scripts};
if ( $fs_type ne "genext2fs" ) {
return "ERROR" if errm(mount_device($device,$mount_point)) == 2;
sys("/usr/lib/bootroot/yard_chrooted_tests $mount_point $t_fstab $t_inittab $t_scripts", "TESTING");
return "ERROR" if errum(sys("umount $mount_point")) == 2;
return "ERROR" if errm(mount_device($device,$mount_point)) == 2;
}
# Now the question is whether or not these next tests depend on
# chroot, since they must have before.
if ( $chosen_tests->{33}{test_links} == 1 ) {
info(0,"\nTEST: links\n");
check_links();
}
if ( $chosen_tests->{34}{test_passwd} == 1 ) {
info(0,"\nTEST: passwd\n");
check_passwd();
}
if ( $chosen_tests->{35}{test_pam} == 1 ) {
info(0,"\nTEST: pam\n");
check_pam();
}
if ( $chosen_tests->{36}{test_nss} == 1 ) {
info(0,"\nTEST: nss\n");
check_nss();
}
if ( $fs_type ne "genext2fs" ) {
return "ERROR" if errum(sys("umount $mount_point")) == 2;
}
} # end sub which_tests
##### This could be made much more complete, but for typical rc type
##### files it seems to catch the common problems.
sub scan_command_file {
my($cmdfile, @args) = @_;
my(%warned, $line);
return if $checked{$cmdfile};
info(0, "\nScanning $cmdfile\n");
open(CMDFILE, "<$cmdfile") or error("$cmdfile: $!");
while ($line = <CMDFILE>) {
chomp($line);
next if $line =~ /^\#/ or /^\s*$/;
next if $line =~ /^\w+=/;
while ($line =~ m!(/(usr|var|bin|sbin|etc|dev)/\S+)(\s|$)!g) {
my($abs_file) = $1;
# next if $abs_file =~ m/[*?]/; # Skip meta chars - we don't trust glob
next if $warned{$abs_file}; # Only warn once per file
if (!-e $abs_file) {
warning_test("$cmdfile($.): $line\n\t$1: missing on root filesystem\n");
$warned{$abs_file} = 1;
}
}
}
close(CMDFILE) or error("close($cmdfile): $!");
$checked{$cmdfile} = 1;
info(0, "Done scanning $cmdfile\n");
}
##### Check_passwd is NOT run under chroot.
sub check_passwd {
my $error;
my($passwd_file) = "$mount_point/etc/passwd";
open(PASSWD, "<$passwd_file") or
($error = error("Can't read passwd file: $!\n"));
return if $error && $error eq "ERROR";
info(0, "\nChecking passwd file $passwd_file\n");
while (<PASSWD>) {
chomp;
next if /^\s*$/; # Skip blank/empty lines
my($line) = $_;
my($login_name, $passwd, $UID, $GID, $user_name, $home, $shell) =
split(':');
next if $passwd eq "*"; # Skip warnings if user can't login
-d ($mount_point . $home) or
warning_test "$passwd_file($.): $line\n",
"\tHome directory of $login_name ($mount_point$home) is missing\n";
-e ($mount_point . $shell) or
warning_test "$passwd_file($.): $line\n",
"\tShell of $login_name ($mount_point$shell) doesn't exist\n";
check_init_files($login_name, $home, $shell);
}
close(PASSWD);
info(0, "Done checking $passwd_file\n");
}
##### Simple PAM configuration checks.
##### Tests whether PAM is needed, and whether the configuration libraries exist.
##### Check_pam is NOT run under chroot.
sub check_pam {
my($pam_configured) = 0; # Have we seen some pam config file yet?
info(0, "Checking for PAM\n");
my($pamd_dir) = "$mount_point/etc/pam.d";
my($pam_conf) = "$mount_point/etc/pam.conf";
if (-e $pam_conf) {
info(0, "Checking $pam_conf\n");
$pam_configured = 1;
open(PAM, $pam_conf) or error("Can't open pam.conf: $!\n");
while (<PAM>) {
chomp;
next if /^\#/ or /^\s*$/; # Skip comments and empty lines
my($file) = (split)[3]; # Get fourth field
if (!-e "$mount_point/$file") {
warning_test "$pam_conf($.): $_\n",
"\tLibrary $file does not exist on root fs\n";
}
# That's all we check for now
}
close(PAM) or error("Closing PAM: $!");
info(0, "Done with $pam_conf\n");
}
if (-e $pamd_dir) {
info(0, "Checking files in $pamd_dir\n");
opendir(PAMD, $pamd_dir) or error("Can't open $pamd_dir: $!");
my($file);
while (defined($file = readdir(PAMD))) {
my($file2) = "$pamd_dir/$file";
next unless -f $file2; # Skip directories, etc.
open(PF, $file2) or error("$file2: $!");
while (<PF>) {
chomp;
next if /^\#/ or /^\s*$/; # Skip comments and empty lines
my($file) = (split)[3]; # Get fourth field
$pam_configured = 1;
if (!-e "$mount_point/$file") {
warning_test "$file2($.): $_\n",
"\tLibrary $file does not exist on root fs\n";
}
}
close(PF);
}
closedir(PAMD);
}
# Finally, see whether PAM configuration is needed
if (!$pam_configured and -e $login_binary) {
my($dependencies) = scalar(`ldd $login_binary`);
if (defined($dependencies) and $dependencies =~ /libpam/) {
warning_test "Warning: login ($login_binary) needs PAM, but you haven't\n",
"\tconfigured it (in /etc/pam.conf or /etc/pam.d/)\n",
"\tYou probably won't be able to login.\n";
}
}
info(0, "Done with PAM\n");
}
##### Basic checks for nsswitch.conf.
##### check_nss is NOT run under chroot.
##### From the nsswitch.conf(5) manpage:
##### For glibc, you must have a file called /lib/libnss_SERVICE.so.X for
##### every SERVICE you are using. On a standard installation, you could
##### use `files', `db', `nis' and `nisplus'. For hosts, you could specify
##### `dns' as extra service, for passwd, group and shadow `compat'. These
##### services will not be used by libc5 with NYS. The version number X
##### is 1 for glibc 2.0 and 2 for glibc 2.1.
sub check_nss {
my($nss_conf) = "$mount_point/etc/nsswitch.conf";
info(0, "Checking for NSS\n");
my($libc) = yard_glob("$mount_point/lib/libc-2*");
my($libc_version) = $libc =~ m|/lib/libc-2.(\d)|;
if (!defined($libc_version)) {
warning_test "Can't determine your libc version\n";
} else {
info(0, "You're using $libc\n");
}
my($X) = $libc_version + 1;
if (-e $nss_conf) {
open(NSS, "<$nss_conf") or die "open($nss_conf): $!";
my($line);
while (defined($line = <NSS>)) {
chomp $line;
next if $line =~ /^\#/;
next if $line =~ /^\s*$/;
my($db, $entries) = $line =~ m/^(\w+):\s*(.+)$/;
# Remove bracketed expressions (action specifiers)
$entries =~ s/\[[^\]]*\]//g;
my(@entries) = split(' ', $entries);
my($entry);
for $entry (@entries) {
next if $entry =~ /^\[/; # ignore action specifiers
my($lib) = "$mount_point/lib/libnss_${entry}.so.${X}";
if (!-e $lib) {
warning_test "$nss_conf($.):\n$line\n",
"\tRoot filesystem needs $lib to support $entry\n";
}
}
}
close(NSS) or error("Closing NSS: $!");
} else {
# No nsswitch.conf is present, figure out if maybe there should be one.
if (-e $login_binary) {
my($dependencies) = scalar(`ldd $login_binary`);
my($libc_version) = ($dependencies =~ /libc\.so\.(\d+)/m);
if ($libc_version > 5) {
# Needs libc 6 or greater
warning_test "Warning: $login_binary on rescue disk needs libc.so.$libc_version,\n"
. "\tbut there is no NSS configuration file ($nss_conf)\n"
. "\ton root filesystem.\n";
}
}
}
info(0, "Done with NSS\n");
}
sub check_links {
info(0, "\nChecking links relative to $mount_point\n");
sub wanted {
if (-l $File::Find::name) {
local($::raw_link) = readlink($File::Find::name);
local($::target) = make_link_absolute($File::Find::name, $::raw_link);
# I added this next test for /dev/stdout link hair.
# This really should be more complicated to handle link chains,
# but as a hack this works for three.
if (onto_proc_filesystem($File::Find::name)) {
} elsif (-l $::target) {
chase_link($::target, 16);
} elsif (!-e $::target) {
warning_test "Warning: Unresolved link: $File::Find::name -> $::raw_link\n";
}
}
};
finddepth(\&wanted, $mount_point);
}
sub chase_link {
my($file, $link_depth) = @_;
if ($link_depth == 0) {
warning_test "Warning: Probable link circularity involving $file\n";
} elsif (-l $file) {
chase_link(make_link_absolute($file, readlink($file)),
$link_depth-1);
}
}
sub check_scripts {
info(0, "\nChecking script interpreters\n");
local($::prog);
sub check_interpreter {
if (-x $File::Find::name and -f _ and -T _) {
open(SCRIPT, $File::Find::name) or error "$File::Find::name: $!";
my($prog, $firstline);
chomp($firstline = <SCRIPT>);
if (($prog) = $firstline =~ /^\#!\s*(\S+)/) {
if (!-e $prog) {
warning_test "Warning: $File::Find::name needs $prog, which is missing\n";
} elsif (!-x $prog) {
warning_test "Warning: $File::Find::name needs $prog, " .
"which is not executable.\n";
}
}
close(SCRIPT);
}
}; # End of sub check_interpreter
find(\&check_interpreter, "/");
}
sub check_getty_type_call {
my($prog, @args) = @_;
if ($prog eq 'getty') {
my($tty, $speed, $type) = @args;
if (!-e "$mount_point/dev/$tty") {
warning_test "\tLine $.: $prog for $tty, but /dev/$tty doesn't exist.\n";
}
if (!defined($Termcap{$type})) {
warning_test "\tLine $.: Type $type not defined in termcap\n";
}
}
## If getty or getty_ps, look for /etc/gettydefs, /etc/issue
## Check that term type matches one in termcap db.
if ($prog =~ /^getty/) {
if (!$checked_for_getty_files) {
warning_test "\tLine $.: $prog expects /etc/gettydefs, which is missing.\n"
unless -e "$mount_point/etc/gettydefs";
warning_test "\tLine $.: $prog expects /etc/issue, which is missing.\n"
unless -e "$mount_point/etc/issue";
$checked_for_getty_files = 1;
}
}
}
###
### NB. This is *not* run under chroot
###
sub check_init_files {
my($user, $home, $shell) = @_;
info(0, "Checking init files of $user (homedir= $home)\n");
my($shellname) = basename($shell);
my @init_files;
##### Try to infer the list of init files to be run for the shell
##### of this user. Order is somewhat important here because of
##### the search path.
if ($shellname =~ /^(bash|sh)$/) {
@init_files = ("/etc/profile", "/etc/bashrc",
"$home/.profile", "$home/.bash_login", "$home/.bashrc",
"$home/.shrc");
} elsif ($shellname eq "ash") {
@init_files = ("/etc/profile", "$home/.profile");
} elsif ($shellname =~ /^(tcsh|csh)$/) {
@init_files = ("/etc/csh.cshrc", "/etc/.cshrc", "/etc/csh.login",
"$home/.cshrc", "$home/.tcshrc", "$home/.login");
}
##### The path to be searched. This may be error prone.
my(@path) = ();
my($init_file);
foreach $init_file (@init_files) {
$init_file = $mount_point . $init_file;
next if $checked{$init_file} or !-r $init_file;
info(0, "Checking $init_file\n");
open(INITF, "<$init_file") or die "$init_file: $!";
while (<INITF>) {
chomp;
next if /^\#/ or /^\s*$/; # Skip comments, whitespace
my($var, $val);
if (($var, $val) = /^\s*(\w+)\s*=\s*(.*)\s*$/) { # Variable assignment
##### Look for PATH assignment
if ($var eq "PATH") {
$val =~ s/^[\"\'](.*)[\"\']$/$1/; # Strip quotes
@path = split(':', $val);
info(1, "Using PATH: ", join(':', @path), "\n");
} else {
next; # Skip other assignments
}
}
my($cmd, $hd_abs);
##### Check for commands that aren't present
($cmd) = /^(\w+)\b/; # Pick up cmd name
if ($cmd and ($hd_abs = find_file_in_path($cmd, @path))) {
# If it's here, see if it's on the rescue disk
if (!(-e "$mount_point/$hd_abs" and -x _)) {
warning_test "$init_file($.): $_\n\t\t$cmd looks like a command but\n",
"\t\tdoes not exist on the root filesystem.\n";
}
}
# Check for commands in backticks that aren't present
($cmd) = /\`(\w+)\b/;
if ($cmd and ($hd_abs=find_file_in_path($cmd))) {
# If it's here, see if it's on the rescue disk
# Note that this could mislead if the user moved it to a different
# dir on the root fs.
if (!-e "$mount_point/$hd_abs") {
warning_test "${init_file}($.): $_\n\t$cmd: missing from root fs.\n";
} elsif (!-x _) {
warning_test "$init_file($.): $_\n\t$cmd: not executable on root fs.\n";
}
}
}
close(INITF);
info(0, "Done with $init_file\n");
$checked{$init_file} = 1;
} # end of foreach
}
sub check_termcap {
my $error;
# Let's first discover whether termcap or terminfo exists
# we can decide how to interpret the termcap info.
# terminfo first
# We assume a terminfo file is not being used .. hum
if (-d "$mount_point/etc/terminfo") {
# There should at least be a linux entry, and infocmp needs to exist.x
my $infocmp = "infocmp -A $mount_point/etc/terminfo -C linux|";
open(TERMCAP, "$infocmp") or
( $error = error("No file $mount_point/etc/terminfo/l/linux"));
return if $error && $error eq "ERROR";
while (<TERMCAP>) {
chomp;
next unless $_;
next if /^\#/; # Skip comments
next if /^\s+/; # Skip non-head lines
##### Get complete logical line
my($def) = $_;
while (/\\$/) { # Trailing backslash => continued
chomp($def); # Discard backslash
chomp($_ = <TERMCAP>); # Get a line, w/o newline char
$def .= $_;
}
##### Extract terminal names from line
my($names) = $def =~ /^([^:]+):/;
my(@terms) = split(/\|/, $names);
@Termcap{@terms} = (1) x ($#terms + 1);
}
}
# termcap next
elsif (-e "$mount_point/etc/termcap") {
open(TERMCAP, "<$mount_point/etc/termcap") or
( $error = error("No file $mount_point/etc/termcap"));
return if $error && $error eq "ERROR";
while (<TERMCAP>) {
chomp;
next unless $_;
next if /^\#/; # Skip comments
next if /^\s+/; # Skip non-head lines
##### Get complete logical line
my($def) = $_;
while (/\\$/) { # Trailing backslash => continued
chomp($def); # Discard backslash
chomp($_ = <TERMCAP>); # Get a line, w/o newline char
$def .= $_;
}
##### Extract terminal names from line
my($names) = $def =~ /^([^:]+):/;
my(@terms) = split(/\|/, $names);
@Termcap{@terms} = (1) x ($#terms + 1);
}
close(TERMCAP);
}
else {
$error = error("No termcap file or terminfo directory.");
return if $error && $error eq "ERROR";
}
} # end sub check_termcap
##### END OF CHECK_ROOT_FS
##### REPLACEMENTS
sub create_fstab {
my($NEWFSTAB) = @_;
open(NEWFSTAB, ">$NEWFSTAB") or die "$NEWFSTAB: $!";
print NEWFSTAB <<BLARD;
# DEVICE MOUNTPOINT TYPE OPTIONS DUMP FSCKORDER
#----------------------------------------------------------------
## Choose an appropriate root mount.
# /dev/ram0 / ext2 defaults
#/dev/ubd/0 / ext2 defaults 1 1
# If you have this, uncomment it.
#devpts /dev/pts devpts mode=0622 0 0
/proc /proc proc defaults
# Entries adapted from existing fstab:
BLARD
my($line);
open(FSTAB, "/etc/fstab") or die "/etc/fstab: $!\n";
while ($line = <FSTAB>) {
chomp $line;
next if $line =~ /^\#/ or $line =~ /^\s*$/;
my($device, $mpt, $type, $options, @rest) = split(' ', $line);
if ($device =~ m!^/(proc|dev/ram)! or $type eq "proc") {
## Don't allow /proc or /dev/ram? definitions
next;
} elsif ($type eq 'swap') {
## Pass swap through unchanged
} else {
## By default:
## - Add a 'noauto' option if it doesn't already have one
## - Put mountpoint under oldroot
$options .= ',noauto' unless $options =~ /\bnoauto\b/;
if ($mpt eq '/') {
#$mpt = "/"; # limitation of mount cmd
$mpt = $main::oldroot; # limitation of mount cmd
} else {
#$mpt = $mpt;
$mpt = $main::oldroot . $mpt;
}
}
print NEWFSTAB join("\t", ($device, $mpt, $type, $options,
@rest)), "\n";
}
close(FSTAB);
close(NEWFSTAB);
info(0,"Created $NEWFSTAB\n");
} # end create_fstab
##### END REPLACEMENTS
1;
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