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gbootroot
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Cleaned up some more.

master
freesource 24 years ago
parent
d6af87d3fb
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f9c2273010
1 changed files with 86 additions and 176 deletions
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  1. 262
      Yard.pm

262
Yard.pm
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@ -31,8 +31,8 @@ package Yard;
use vars qw(@ISA @EXPORT %EXPORT_TAGS);
use Exporter;
@ISA = qw(Exporter);
@EXPORT = qw(kernel_version_check read_contents_file extra_links
library_dependencies hard_links space_check
@EXPORT = qw(start_logging_output kernel_version_check read_contents_file
extra_links library_dependencies hard_links space_check
create_filesytem);
use strict;
@ -51,45 +51,15 @@ my $BLKFLSBUF_ioctl = 4705;
my $EXT2_BLOCK_SIZE = 1024;
my $INODE_SIZE = 1024;
my $objcopy = "objcopy";
my($Warnings) = 0;
STDOUT->autoflush(1);
#@@ start_logging_output();
#@@ info(0, "root_fs\n");
#@@ info(1, "(running under Perl $PERL_VERSION)\n");
my($Warnings) = 0;
sub warning {
info(0, "Warning: ", @_);
$Warnings++;
}
##############################################################################
##### Check some basic things before starting.
##### There's probably a more graceful way to maintain and check
##### a set of user options (via a Perl module), but I'm too lazy
##### to track it down.
##############################################################################
# Too restrictive for gBootRoot
#if ($REAL_USER_ID != 0) {
# error("This script must be run as root\n");
#}
# Not necessary, gBootRoot handles this stuff.
#if (!defined($::device) and !defined($::mount_point)) {
# error("Nothing defined in CFG package. You probably just copied\n",
# "an old Config.pl file.\n";
#}
# Check mount point
#if (-d $::mount_point and -w _) {
# info(1, "Using $::mount_point as mount point for $::device\n");
#} else {
# error("Mount point $::mount_point must be a directory and\n",
# "must be write-enabled.\n";
#}
# This is a good thing to be used for all device checking in
# gBootRoot, but it may be restrictive since sometimes it is a
# good thing to mount a whole device .. cdroms for instance.
@ -99,70 +69,34 @@ sub warning {
# Make sure $::device isn't already mounted and $::mount_point is free
#@@ load_mount_info();
## This is put here for reference, and is from Config.pl
## loopback is the standard for building a filesytem in gBootRoot.
## No choice here.
# $device: string (device name)
#
# The device for building the filesystem. This can be /dev/ram0 or a
# spare partition. You can turn off swapping temporarily and use the
# swap partition on your hard disk. You can use a loopback device if
# your kernel supports them -- see the section "Using a Loopback
# Device" in the Yard documentation for instructions.
# It should not be a symbolic link.
#
#$device = "/dev/ram0";
#if (defined($::mounted{$::device})) {
# if ($::mounted{$::device} eq $::mount_point) {
# #info(1, "Device $::device is already mounted on $::mount_point\n");
# info(1, "Unmounting it automatically.\n");
# sys("umount $::mount_point");
# } else {
# error("$::device is already mounted elsewhere (on $::mounted{$::device})\n",
# "Unmount it first.\n");
# }
#} elsif (defined($::mounted{$::mount_point})) {
# error("Some other device is already mounted on $::mount_point\n");
#}
# Have to test this every time so we can work around.
## This will get replaced with a readdir loop, no sense relying on people's
## shells. Anotherwards, yard_glob get changed.
#@@ test_glob();
##### Determine release of $::kernel for modules.
##### Set RELEASE environment variable for use in contents.
## Still need an option for this, may become part of beginners section.
## uses kernel_version .. will probably just run these in relation to
## gBootRoots checks.
## 'use Yard; $kernel = "/root/HDB/vmlinuz-2.2.14-ncr"; $kernel_version = "1.2"; kernel_version_check();
## requires $kernel && $kernel_version
## REQUIRES $kernel opt. $kernel_version
sub kernel_version_check {
if (defined($::kernel_version)) {
my($kernel,$kernel_version) = @_;
if (defined($kernel_version)) {
# Check to see if it agrees
my($version_guess) = kernel_version($::kernel);
if ($version_guess ne $::kernel_version) {
my($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",
"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;
$ENV{'RELEASE'} = $kernel_version;
} elsif (defined($ENV{'RELEASE'} = kernel_version($::kernel))) {
info(0, "Version probe of $::kernel returns: $ENV{'RELEASE'}\n");
} elsif (defined($ENV{'RELEASE'} = kernel_version($kernel))) {
info(0, "Version probe of $kernel returns: $ENV{'RELEASE'}\n");
} else {
warning "Can't determine kernel version of $::kernel\n";
warning "Can't determine kernel version of $kernel\n";
my($release) = `uname -r`;
if ($release) {
chomp($release);
@ -174,39 +108,25 @@ sub kernel_version_check {
}
}
} # end sub kernel_version
} # 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'});
## gBootRoot does this as a separate process
#if ($::disk_set !~ /^(single|double|base\+extra)$/) {
# error("Config variable disk_set is set to \"$::disk_set\"\n",
# "which is not a valid value.\n");
#}
############################
##### READ IN CONTENTS FILE
############################
## uses info, resolve_file, error, cf_warn, make_link_absolute,
## make_link_relative, cf_die, must_be_abs, replaced_by, yard_glob,
## include_file
## requires $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) = @_;
my($contents_file) = resolve_file($::contents_file);
info(0, "\n\nPASS 1: Reading $::contents_file");
#info 0, " ($contents_file)" if $contents_file ne $::contents_file;
info(0, "\n\nPASS 1: Reading $contents_file");
info(0, "\n");
#my(%Included);
#my(%replaced_by);
#my(%links_to);
#my(%is_module);
open(CONTENTS, "<$contents_file") or error("$contents_file: $!");
my($line);
@ -246,25 +166,29 @@ sub read_contents_file {
@files = ($abs_link);
} elsif ($line =~ /<=/) { ##### REPLACEMENT SPEC
cf_die($line, "Can't use wildcard in replacement specification") if
$line =~ /[\*\?\[]/;
cf_die($contents_file, $line,
"Can't use wildcard in replacement specification") if
$line =~ /[\*\?\[]/;
my($file, $replacement) = $line =~ /^(\S+)\s*<=\s*(\S+)\s*$/;
if (!defined($replacement)) {
cf_warn($line, "Can't parse this replacement spec");
cf_warn($contents_file, $line,
"Can't parse this replacement spec");
next LINE;
} else {
must_be_abs($file);
(-d $file) and cf_warn($line, "left-hand side can't be directory");
(-d $file) and cf_warn($contents_file, $line,
"left-hand side can't be directory");
my($abs_replacement) = find_file_in_path($replacement);
if (!(defined($abs_replacement) and -e $abs_replacement)) {
cf_warn($line, "Can't find $replacement");
cf_warn($contents_file, $line, "Can't find $replacement");
} elsif ($replacement =~ m|^/dev/(?!null)|) {
# Allow /dev/null but no other devices
cf_warn($line, "Can't replace a file with a device");
cf_warn($contents_file, $line,
"Can't replace a file with a device");
} else {
$replaced_by{$file} = $abs_replacement;
@ -275,7 +199,7 @@ sub read_contents_file {
} # End of replacement spec
} elsif ($line =~ /(<-|=>)/) {
cf_warn($line, "Not a valid arrow.");
cf_warn($contents_file, $line, "Not a valid arrow.");
next LINE;
} else {
@ -285,7 +209,8 @@ sub read_contents_file {
for $expr (split(' ', $line)) {
my(@globbed) = yard_glob($expr);
if ($#globbed == -1) {
cf_warn($line, "Warning: No files matched $expr");
cf_warn($contents_file, $line,
"Warning: No files matched $expr");
} elsif (!($#globbed == 0 and $globbed[0] eq $expr)) {
info(1, "Expanding $expr to @globbed\n");
}
@ -299,7 +224,8 @@ sub read_contents_file {
if ($file =~ m|^/|) { ##### Absolute filename
if (-l $file and readlink($file) =~ m|^/proc/|) {
info(1, "Recording proc link $file -> ", readlink($file), "\n");
info(1, "Recording proc link $file -> ", readlink($file),
"\n");
$Included{$file} = 1;
$links_to{$file} = readlink($file);
@ -313,7 +239,8 @@ sub read_contents_file {
next FILE;
} else {
cf_warn($line, "Absolute filename $file doesn't exist");
cf_warn($contents_file, $line,
"Absolute filename $file doesn't exist");
}
} else { ##### Relative filename
@ -322,42 +249,39 @@ sub read_contents_file {
info(1, "Found $file at $abs_file\n");
$Included{$abs_file} = 1;
} else {
cf_warn($line, "Didn't find $file anywhere in path");
cf_warn($contents_file, $line,
"Didn't find $file anywhere in path");
}
}
} # End of FILE loop
} # End of LINE loop
info(0, "\nDone with $contents_file\n\n");
##if ($::disk_set eq "base+extra") {
## include_file(find_file_in_path("tar"))
##}
close(CONTENTS) or error("close on $contents_file: $!");
## may or may not include this in read_contents_file
} # end read_contents_file
#####################################
# Uses include_file
sub extra_links {
my ($contents_file) = @_;
info(0, "\n\nPASS 2: Picking up extra files from links...\n");
for (keys %Included) {
include_file($_);
# watch for "" - GBteam
include_file($contents_file, $_) if $_ ne "";
}
info(0, "Done.\n\n");
}
#####################################
sub library_dependencies {
my ($contents_file) = @_;
info(0, "PASS 3: Checking library dependencies...\n");
info(1, "(Ignore any 'statically linked' messages.)\n");
@ -389,8 +313,8 @@ sub library_dependencies {
$is_module{$file} = 1;
} elsif ($file_line =~ m/shared object/) {
##### Any library (shared object) seen here was explicitly included
##### by the user.
##### Any library (shared object) seen here was explicitly
##### included by the user.
push(@{$lib_needed_by{$file}}, "INCLUDED BY USER");
}
@ -406,15 +330,18 @@ sub library_dependencies {
my($abs_lib) = $lib;
if ($lib =~ /not found/) {
warning "File $file needs library $lib, which does not exist!";
warning "File $file needs library $lib," .
" which does not exist!";
} else {
##### Right-hand side of the ldd output may be a symbolic link.
##### 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 = $lib;
include_file($lib);
include_file($contents_file, $lib);
while (1) {
if (defined($links_to{$abs_lib})) {
$abs_lib = make_link_absolute($abs_lib,
@ -476,7 +403,7 @@ sub library_dependencies {
}
$line .= $binary . " ";
}
##info(1, $line, "\n" if $line);
info(1, $line, "\n") if $line;
if (!($seen_ELF_lib and $seen_AOUT_lib)) {
@ -519,7 +446,7 @@ sub library_dependencies {
my($ld_file) = (yard_glob("/lib/ld-linux.so.?"))[-1]; # Get last one
if (defined($ld_file)) {
info(1, "Adding loader $ld_file for ELF libraries\n");
include_file($ld_file);
include_file($contents_file, $ld_file);
} else {
info(0, "Can't find ELF loader /lib/ld-linux.so.?");
}
@ -530,7 +457,7 @@ sub library_dependencies {
my($ld_file);
foreach $ld_file (yard_glob("/lib/ld.so")) {
info(1, "Adding loader $ld_file for a.out libraries\n");
include_file($ld_file);
include_file($contents_file, $ld_file);
}
}
@ -565,9 +492,12 @@ sub hard_links {
##########################
# REQUIRES $fs_size $strip_objfile (0|1)
# GBteam adds stripped file size check using stripper()
sub space_check {
info(0, "Checking space needed.\n");
my ($fs_size, $strip_objfiles) = @_;
my($total_bytes) = 0;
my(%counted);
@ -592,10 +522,12 @@ sub space_check {
} 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.
##### 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.
if (!$counted{$devino}) {
info(1, "Counting ", -s _, " bytes of hard-linked file $file\n");
info(1, "Counting ", -s _,
" bytes of hard-linked file $file\n");
$total_bytes += bytes_allocated($file);
$counted{$devino} = 1;
} else {
@ -622,9 +554,9 @@ sub space_check {
info(0, "Total space needed is ", bytes_to_K($total_bytes), " Kbytes\n");
if (bytes_to_K($total_bytes) > $::fs_size) {
info(0, "This is more than $::fs_size Kbytes allowed.\n");
if ($::strip_objfiles) {
if (bytes_to_K($total_bytes) > $fs_size) {
info(0, "This is more than $fs_size Kbytes allowed.\n");
if ($strip_objfiles) {
info(0, "But since object files will be stripped, more space\n",
"may become available. Continuing...\n");
} else {
@ -645,6 +577,7 @@ sub space_check {
# This could be broken up into a lot of functions
## copy_strip_file will be modified.
sub create_filesystem {
my $file;
@ -795,15 +728,15 @@ sub create_filesystem {
} # end sub create_filesystem
#############################################################################
#######################################
##### Utility subs for make_root_fs.pl
#############################################################################
#######################################
##### Add file to the file set. File has to be an absolute filename.
##### If file is a symlink, add it and chase the link(s) until a file is
##### reached.
sub include_file {
my($file) = @_;
my($contents_file, $file) = @_;
must_be_abs($file);
if (onto_proc_filesystem($file)) {
@ -837,7 +770,7 @@ sub include_file {
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");
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} = $file;
@ -849,19 +782,17 @@ sub include_file {
}
}
##### More informative versions of warn and die, for the contents file
sub cf_die {
my($line, @msgs) = @_;
info(0, "$::contents_file($cf_line): $line\n");
my($contents_file, $line, @msgs) = @_;
info(0, "$contents_file($cf_line): $line\n");
foreach (@msgs) { info(0, "\t$_\n"); }
exit;
}
sub cf_warn {
my($line, @msgs) = @_;
info(0, "$::contents_file($cf_line): $line\n");
my($contents_file, $line, @msgs) = @_;
info(0, "$contents_file($cf_line): $line\n");
$Warnings++;
foreach (@msgs) { info(0, "\t$_\n"); }
}
@ -905,19 +836,12 @@ sub copy_strip_file {
##### End of make_root_fs
##############################################################
##############################################################
##############################################################
###############################################################
###############################################################
########################################################
##
## YARD_UTILS.PL -- Utilities for the Yard scripts.
##
########################################################
# Get device number of /proc filesystem
my($proc_dev) = (stat("/proc"))[0];
@ -935,11 +859,12 @@ sub error {
}
sub start_logging_output {
#my($logfile) = basename($PROGRAM_NAME, ('.pl','.perl')) . ".log";
my ($yard_temp) = @_;
my $logfile;
if (defined($::yard_temp) and $::yard_temp) {
$logfile = $::yard_temp;
if (defined($yard_temp) and $yard_temp) {
$logfile = $yard_temp;
}
# ERRORCHECK
open(LOGFILE, ">$logfile") or die "open($logfile): $!\n";
@ -958,8 +883,6 @@ sub sys {
0; # like system()
}
sub load_mount_info {
undef %::mounted;
undef %::fs_type;
@ -1005,18 +928,6 @@ sub must_be_abs {
}
# resolve_file: Resolve a file name.
# NB. This now resolves relative names WRT config_dest rather than cwd.
sub resolve_file {
my($file) = @_;
if ($file =~ m|^/|) {
$file; # File is absolute, just return it
} else {
"$::config_dest/$file";
}
}
sub sync {
# Parts of unix are still a black art
system("sync") and die "Couldn't sync!";
@ -1029,6 +940,7 @@ sub sync {
# If file is relative, file is resolved relative to config_dest and lib_dest.
my(@pathlist);
sub find_file_in_path {
my($file, @path) = @_;
if (!@path) {
@ -1047,20 +959,18 @@ sub find_file_in_path {
}
if ($file =~ m|/|) {
##### file contains a slash; don't search for it.
resolve_file($file);
} else {
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;
}
undef;
}
}
# Note that this does not verify existence of the returned file.

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