/usr/sbin/fai-chboot is in fai-server 4.3.1+deb8u1.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
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#*********************************************************************
#
# fai-chboot -- manage configuration for network boot
#
# This script is part of FAI (Fully Automatic Installation)
# Copyright (C) 2003-2014 Thomas Lange, lange@informatik.uni-koeln.de
# Universitaet zu Koeln
#
#*********************************************************************
# This program is free software; you can 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.
#
# A copy of the GNU General Public License is available as
# '/usr/share/common-licences/GPL' in the Debian GNU/Linux distribution
# or on the World Wide Web at http://www.gnu.org/copyleft/gpl.html. You
# can also obtain it by writing to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
#*********************************************************************
# variable needed: $nfsroot
use strict;
use Socket;
use Net::hostent;
use Getopt::Std;
use File::Copy;
our ($opt_D,$opt_p,$opt_h,$opt_t,$opt_s,$opt_C,$opt_P,$opt_E,$opt_c,$opt_l,$opt_d,$opt_i,$opt_S,$opt_L,$opt_B,$opt_I,$opt_n,$opt_v,$opt_e,$opt_F,$opt_f,$opt_k,$opt_g,$opt_o,$opt_u,$opt_U);
our ($error,$pxedir,$nfsroot,$tftproot,$verbose,$append,$action,$kernelsuffix);
our ($mac,$ipadr,$cfdir,$flags,$debug,$match,$bootprot);
our (%hname,%hexname,%type,@allfiles,@templates,@enabled,@other,@patterns,@disabled);
our ($initrd,$kernelname,$rootfs);
$Getopt::Std::STANDARD_HELP_VERSION=1;
$0=~ s#.+/##; # remove path from program name
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
sub ip2hex {
my $ipadr = shift;
my $hex = sprintf("%02X%02X%02X%02X", split(/\./,$ipadr));
return ($ipadr,$hex);
}
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
sub host2hex {
my $host = shift;
my $h;
if ($host =~ /^\d+\.\d+\.\d+\.\d+$/) {
# hostname is already an IP address
return ip2hex($host);
}
return ('no IP','default') if ($host =~ /^default/);
# MAC address with separator "-" or ":"
if ($host =~ /^([0-9a-fA-F]{2}([:-]|$)){6}$/i) { # pattern matching
$host = lc $host; # lowercase for pxe-file
my @nums = split /[:-]/, $host;
$mac = join ('-', "01",@nums); # build pxe-filename
return ('no IP',$mac);
}
if ($host =~ /^[0-9a-fA-F]{12}$/i) { # pattern matching MAC address w/o separator
$host = lc $host;
my @nums = split /(.{2})/, $host;
$mac = join ('-', "01",@nums[1,3,5,7,9,11]); # build pxe-filename
return ('no IP',$mac);
}
$h = gethost($host);
die "$0: unknown host: $host\n" unless $h;
if ( @{$h->addr_list} > 1 ) {
my $i;
for my $addr ( @{$h->addr_list} ) {
$ipadr = inet_ntoa($addr);
printf "$host \taddr #%d is [%s]\n", $i++, $ipadr if $debug;
}
} else {
$ipadr = inet_ntoa($h->addr);
printf "$host \taddress is [%s]\n", $ipadr if $debug;
}
ip2hex($ipadr);
}
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
sub readpxedir {
# read all files in pxedir and add them to different arrays
opendir(DIR, $pxedir) || die "Can't opendir $pxedir: $!";
foreach (readdir(DIR)) {
next if /^\./;
next if /~$/;
next if /\.bak$/;
if (/^(default|[0-9A-F]+)$/) { push @enabled, $_ ; next}
if (/\.tmpl$/) { push @templates, $_ ; next}
if (/\.disable$/) {
my $filename=(split (/\./,$_))[0];
if (-f "$pxedir/$filename") {
warn "Skipping $_ as disabled host because also enabled.\n" if $verbose;
} else {
push @disabled, $_;
}
next;
}
push @other, $_;
}
}
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
sub lsdir {
# -ld list only disabled hosts
# -le list only enabled hosts
# -lt list only templates
# -lo list only "other", i.e that does not match templates or hosts
# -lg list by goups (enabled, disabled, templates, others)
# -l[detog] <pattern> list matching pattern
my ($h,$n,$host,$iaddr,$hex,$type);
@patterns = @_; # a global variable
readpxedir();
# create list which entries we want to list
@allfiles = (@enabled,@disabled,@templates,@other);
$opt_d and @allfiles = @disabled;
$opt_e and @allfiles = @enabled;
$opt_t and @allfiles = @templates;
$opt_o and @allfiles = @other;
$opt_g and @allfiles = (@enabled,@disabled,@templates,@other);
# map all entries (in HEX) to hostname or IP
foreach $hex (@allfiles) {
undef $host;
undef $type;
if ($hex =~ /^default(.disable)?$/) {
$host = $hex;
$type = '[DEFAULT]';
}
if ($hex =~ /\.tmpl$/) {
$host = "$hex";
$type = '[Template]';
}
if ($hex =~ /^01-[0-9A-F-]{17}$/i) {
$host = "$hex";
$type = '[MAC address]';
}
if (($hex =~ /^[0-9A-F]+/) && ($hex !~ /^01-/) ) {
my $hexstrip = (split /\./,$hex)[0]; # remove .disable if necessary
$n = $hexstrip;
# hex to ip/subnet address
while ( length $n ) {
$host = sprintf( "%s%d" ,$host?"$host.":$host,
(hex substr $n,0,1,"" ) * 16 + (hex substr $n,0,1,""));
}
if ( $host and ( length($hexstrip) < 8) ) {
$host = "Subnet: $host/". length($hexstrip)*4
} else {
# ip to hostname
$iaddr = inet_aton($host);
if ($h = gethostbyaddr($iaddr, AF_INET)) {
$host = $h->name;
$host =~ s/^([^.]+).*/$1/; # strip domain from FQDN so we have short hostnames
}
}
}
if ( !$host ) {
$host = $hex;
$type = '[Other]';
}
$hexname{$host} = $hex;
$hname{$hex}= $host;
$type{$hex} = $type if $type;
}
if ($opt_g) { # print in group, sorted inside each group
prtsorted(@enabled);
prtsorted(@disabled);
prtsorted(@templates);
prtsorted(@other);
exit 0;
}
prtsorted(keys %hname);
exit 0;
}
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
sub prtsorted {
my @list = @_;
@list = sort map {$hname{$_}} @list;
foreach (@list) {
printpxe ($_,$hexname{$_}, $type{$_});
}
}
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
sub printpxe {
my ($host,$hex, $type) = @_;
my ($kernelname,$append);
$match = (@patterns) ? 0: 1; # set match to 1 if no pattern is given
foreach (@patterns) {
$match = 1 if $host =~ /$_/;
}
return unless $match; # do not print entries if no pattern matches
# read pxe config file for a host
undef $kernelname;
open (CFG,"$pxedir/$hex") || die "$! $@\n";
while (<CFG>) {
next if /^#/;
/\bkernel\s+(\S+)/ and $kernelname = $1;
/\b(localboot.+)/ and $kernelname = $1;
/\bappend\s+(.+)/ and $append = $1;
}
close (CFG);
if ($opt_l && ! $opt_L) {
$append =~ /FAI_ACTION=(\S+)/;
$append = $1;
# printf "%-16.16s $append $kernelname %-8s\n",$host,$hex;
printf "%-26.26s %-22.22s $append $kernelname\n",$type?$type:$host,$hex;
} else {
printf "%s %s $kernelname $append\n",$type?$type:$host,$hex;
}
undef $append;
undef $kernelname;
}
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
sub usage {
&HELP_MESSAGE;
exit 0;
}
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
sub HELP_MESSAGE {
print << "EOM";
Please read the manual pages fai-chboot(8).
EOM
}
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
sub mkpxecfg {
my ($host,$kernel,$rootfs,$initrd) = @_;
my ($ipadr,$hex) = host2hex($host);
warn "$host has $ipadr in hex $hex\n" if $verbose;
if (-f "$pxedir/$hex.disable") {
unlink "$pxedir/$hex.disable";
print "removed old $pxedir/$hex.disable\n";
}
warn "Writing file $pxedir/$hex for $host\n" if $verbose;
return if $opt_n;
if ($opt_p && -e "$pxedir/$hex") {
warn "WARNING: $pxedir/$hex already exists.\nSkipping file creation. ";
return;
}
open (FILE,"> $pxedir/$hex") or warn "$0 $@ $!";
print FILE << "EOM";
# generated by fai-chboot for host $host with IP $ipadr
default fai-generated
label fai-generated
$kernel
EOM
$append="append $initrd $bootprot $rootfs $opt_k $flags $action\n";
print FILE "$append" unless ($append =~ /append\s+$/);
print FILE "IPAPPEND 6\n" if $opt_P;
close FILE;
}
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
sub disable {
# rename network config file
my ($host) = shift;
my ($ipadr,$hex) = host2hex($host);
if (! -e "$pxedir/$hex") {
print "$host ($hex) is not enabled\n";
return;
}
print "disable pxe config for $host in hex $hex\n" if $verbose;
return if $opt_n;
rename "$pxedir/$hex","$pxedir/$hex.disable" or $error .= "\nRename for $hex failed. $! $@";
}
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
sub enable {
# rename network config file
my ($host) = shift;
my ($ipadr,$hex) = host2hex($host);
-e "$pxedir/$hex" and print "$host ($hex) is already enabled\n" and return;
if (! -e "$pxedir/$hex.disable") {
print "$host ($hex) is not disabled\n";
return;
}
print "reenable pxe config for $host in hex $hex\n" if $verbose;
return if $opt_n;
rename "$pxedir/$hex.disable","$pxedir/$hex" or $error .= "\nRename for $hex failed. $! $@";
}
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
sub docopy {
my ($srcfile, $pxedir, $desthex, $desthost, $ipadr) = @_;
open (SOURCE, "$srcfile");
open (DEST, ">$pxedir/$desthex") || die "Can't opendir $pxedir: $!";
print DEST "# template generated by fai-chboot for host $desthost with IP $ipadr from source $srcfile\n";
while (<SOURCE>) {
print DEST $_;
}
close SOURCE;
close DEST;
}
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
sub tcopy {
my ($srchost,$desthost) = @_;
my ($ipadr,$srcfile,$srchex,$desthex);
if (gethost($srchost)) {
($ipadr,$srchex) = host2hex($srchost);
if (-e "$pxedir/$srchex") {
$srcfile = "$pxedir/$srchex";
} elsif (-e "$pxedir/$srchex.disable") {
$srcfile = "$pxedir/$srchex.disable";
} elsif (-e "$pxedir/$srchost" ) {
$srcfile = "$pxedir/$srchost";
} elsif (-e "$pxedir/$srchost.tmpl" ) {
$srcfile = "$pxedir/$srchost.tmpl";
} else {
warn "Source file for $srchost ($srchex) not available\n";
return;
}
} elsif ( -e "$pxedir/$srchost") {
$srcfile = "$pxedir/$srchost";
} elsif ( -e "$pxedir/$srchost.tmpl") {
$srcfile = "$pxedir/$srchost.tmpl";
} else {
warn "Source file for $srchost not available\n";
return;
}
if ($desthost =~ /\.tmpl$/) {
if (-e "$pxedir/$desthost") {
warn "Template $desthost already exist. Copying aborted.\n";
return;
}
print "copy pxe config from $srchost to template $desthost\n" if $verbose;
docopy($srcfile,$pxedir,$desthost,$desthost,$ipadr);
} else {
($ipadr,$desthex) = host2hex($desthost);
if (-f "$pxedir/$desthex.disable") {
unlink "$pxedir/$desthex.disable";
print "removed old $pxedir/$desthex.disable\n";
}
print "copy pxe config from $srchost to $desthost ($desthex)\n" if $verbose;
docopy($srcfile,$pxedir,$desthex,$desthost,$ipadr);
}
}
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
getopts('gBc:C:D:eEdhnvlLiIpf:Fk:Ss:tu:U:oP') || usage;
$opt_h and usage;
$opt_n and $opt_v = 1;
$opt_v and $verbose = 1;
$cfdir = $opt_C || $ENV{'FAI_ETC_DIR'} || '/etc/fai';
-d $cfdir || die "ERROR: $cfdir does not exists.";
$opt_L and $opt_l = 1;
$opt_l or ( @ARGV ) or usage;
($opt_B and $opt_F) && die "ERROR: use only one option out of -B and -F\n";
($opt_S and $opt_I) && die "ERROR: use only one option out of -I and -S\n";
#TODO: also -e, -r and -c can't be used together
if ($opt_U && $opt_U !~ m#/$#) {
die "URL $opt_U must end with a slash\n";
}
# read the nfsroot variable; a little bit ugly, but it works
$nfsroot = `. $cfdir/nfsroot.conf 2>/dev/null; echo \$NFSROOT`;
chomp $nfsroot;
$nfsroot = '/srv/fai/nfsroot' unless $nfsroot;
$tftproot = `. $cfdir/nfsroot.conf 2>/dev/null; echo \$TFTPROOT`;
chomp $tftproot;
$tftproot = '/srv/tftp/fai' unless $tftproot;
$pxedir = $opt_D || "$tftproot/pxelinux.cfg";
(-d $pxedir) || die "PXE directory $pxedir does not exist.";
$opt_l and lsdir(@ARGV);
if ($opt_d) {
die "Missing host name(s). Can't disable network booting.\n" unless @ARGV;
foreach (@ARGV) {
disable($_);
}
$error and die "$0: $error\n";
exit 0;
}
if ($opt_c) {
die "Missing destination host name(s). Can't copy.\n" unless @ARGV;
# copy a template config to multiple hosts
foreach (@ARGV) {
tcopy($opt_c,$_);
}
$error and die "$0: $error\n";
exit 0;
}
if ($opt_e) {
die "Missing host name(s). Can't reenable network booting.\n" unless @ARGV;
foreach (@ARGV) {
enable($_);
}
$error and die "$0: $error\n";
exit 0;
}
if ($opt_S) {
$opt_i = 1;
$action="FAI_ACTION=sysinfo";
}
if ($opt_I) {
$opt_i = 1;
$action="FAI_ACTION=install";
}
if ($opt_i || $opt_s) {
$kernelsuffix = (glob "$tftproot/vmlinuz*$opt_s")[-1];
$kernelsuffix=~ s/.+vmlinuz-//;
die "No kernel found matching $tftproot/vmlinuz*$opt_s\n" unless $kernelsuffix;
}
if ($opt_i) {
my $bopt;
# check if we use live-boot or dracut inside the nfsroot
if ( -d "$nfsroot/live/filesystem.dir/boot" ) {
$bopt="boot=live";
} else {
$bopt="aufs";
}
# create config so host will boot the install kernel
$kernelname = "kernel ${opt_U}vmlinuz-$kernelsuffix";
$initrd = "initrd=${opt_U}initrd.img-$kernelsuffix";
$rootfs = "root=$nfsroot $bopt";
$bootprot = "ip=dhcp ";
} elsif ($opt_o) {
$kernelname = 'localboot 0';
$rootfs = '';
$bootprot = '';
$flags = '';
} else {
$kernelname = shift;
$kernelname = "kernel $kernelname";
# $rootfs = shift or die "No rootfs specified.\n";
}
$opt_F and $opt_f="verbose,sshd,createvt";
$opt_B and $opt_f="verbose,sshd,reboot";
$opt_E and $opt_f="$opt_f,initial";
$opt_f and $flags="FAI_FLAGS=$opt_f";
$opt_u and $flags.=" FAI_CONFIG_SRC=$opt_u"; # set -u as FAI_CONFIG_SRC
die "No host specified.\n" unless @ARGV;
warn "Booting $kernelname\n" if $verbose;
warn " append $initrd $bootprot $opt_k\n" if ( $verbose and ("$initrd $bootprot $opt_k" !~ /^\s+$/));
warn " $flags\n\n" if ($verbose and $flags);
$opt_k && print "Kernel parameters: $opt_k\n";
foreach (@ARGV) { mkpxecfg($_,$kernelname,$rootfs,$initrd); }
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