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kexec-bootloader
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183
kexec-bootloader
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#!/usr/bin/perl
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#
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# This program is free software; you can redistribute it and/or {{{
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# modify it under the terms of the GNU General Public License
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# as published by the Free Software Foundation; either version 2
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# of the License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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# 02110-1301, USA. }}}
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#
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use Bootloader::Tools;
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use strict;
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use Getopt::Long;
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use constant FALSE => 0;
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use constant TRUE => 1;
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my $GRUBDIR = "/boot/grub";
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my $GRUBDEFAULT = "$GRUBDIR/default";
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my $debug = FALSE;
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#
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# Prints the given stuff (variable number of arguments) if debugging has
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# been enabled. Does nothing otherwise.
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sub print_debug(@) # {{{
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{
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if ($debug) {
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print STDERR @_;
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print STDERR "\n";
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}
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} # }}}
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#
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# Returns the value stored with "grubonce". If no value has been stored
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# or the /boot/grub/default file is not readable, then -1 is returned.
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sub get_grubonce() # {{{
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{
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# no /boot/grub/default file
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if (! -f $GRUBDEFAULT) {
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print_debug("get_grubonce(): No $GRUBDEFAULT.");
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return -1;
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}
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# read /boot/grub/default
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open(FH, $GRUBDEFAULT) or return -1;
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my $value;
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my $ret = sysread(FH, $value, 10);
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close FH;
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# only if we have read 4 bytes it's valid
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if ($ret != 10) {
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print_debug("get_grubonce(): Read returned $ret instead of 4.");
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return -1;
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}
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$value =~ s/\n//g;
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my $once = int($value);
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# 0x4000 is the "magic once flag"
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if ($once & 0x4000) {
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return $once & ~0x4000;
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} else {
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print_debug("get_grubonce(): No magic 0x40000.");
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return -1;
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}
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} # }}}
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#
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# Parses command line options and sets global variables.
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sub parse_options() # {{{
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{
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GetOptions(
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"D|debug" => \$debug
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);
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} # }}}
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parse_options();
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Bootloader::Tools::InitLibrary();
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my $loader = Bootloader::Tools::GetBootloader();
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my $default = -1;
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if ($loader =~ m/GRUB/i) {
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$default = get_grubonce();
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print_debug("GRUB Default: $default");
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}
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my $section = undef;
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# do we have a default?
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if ($default > 0) {
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my @sections = Bootloader::Tools::GetSectionList();
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print_debug("Number of sections: " . $#sections);
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if ($#sections < 0 || $#sections < $default) {
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print STDERR "WARNING: grubonce default number ($default) is invalid.\n";
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print STDERR " Falling back to the default GRUB section.\n";
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} else {
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my $sect_name = $sections[$default];
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$section = Bootloader::Tools::GetSection($sect_name);
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}
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}
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# use the default section if we didn't get any default otherwise
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if (!$section) {
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$section = Bootloader::Tools::GetDefaultSection();
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}
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if ($debug) {
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print "Type : " . $section->{"type"}."\n";
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print "Name : " . $section->{"name"}."\n";
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print "Image : " . $section->{"image"}."\n";
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print "Initrd : " . $section->{"initrd"}."\n";
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print "VGA : " . $section->{"vgamode"}."\n";
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print "Append : " . $section->{"append"}."\n";
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print "Root : " . $section->{"root"}."\n";
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}
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if ($section->{"type"} ne "image") {
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print STDERR "Default boot section is no image.";
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exit(1);
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}
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# check if the image exists
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if (! -f $section->{"image"}) {
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print STDERR "Image '" . $section->{"image"} . "' does not exist.\n";
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exit(1);
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}
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# check if the initrd exists
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if ($section->{"initrd"} && ! -f $section->{"initrd"}) {
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print STDERR "Initrd '" . $section->{"initrd"} . "' does not exist.\n";
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exit(1);
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}
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# Do we have kexec?
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if (system("which kexec &>/dev/null") != 0) {
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print STDERR "kexec not available. Install kexec-tools.\n";
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exit(1);
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}
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# build the command list
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my $cmd = "kexec";
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# append image
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$cmd .= " -l '" . $section->{"image"} . "'";
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# append initrd if available
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if ($section->{"initrd"}) {
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$cmd .= " --initrd='" . $section->{"initrd"} . "'";
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}
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# build append line
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my $append = "";
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if ($section->{"root"}) {
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$append .= "root=" . $section->{"root"};
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}
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if ($section->{"vga"}) {
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$append .= " vga=" . $section->{"vga"};
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}
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if ($section->{"append"}) {
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$append .= " " . $section->{"append"};
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}
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# and tell that kexec
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$cmd .= " --append='" . $append . "'";
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print_debug("Kexec call: " . $cmd);
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if (system($cmd) != 0) {
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print STDERR "kexec($cmd) failed.";
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exit(1);
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}
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exit(0);
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# :vim set ts=4 sw=4 et fdm=markers: :collapseFolds=1:
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81
kexec-bootloader.8.txt
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81
kexec-bootloader.8.txt
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//{{{ Copyright (c) 2008, SUSE LINUX Products GmbH
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//
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are met:
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//
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// Redistributions of source code must retain the above copyright notice, this
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// list of conditions and the following disclaimer.
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//
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// Redistributions in binary form must reproduce the above copyright notice,
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// this list of conditions and the following disclaimer in the documentation
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// and/or other materials provided with the distribution.
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//
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// Neither the name of the Novell nor the names of its contributors may be used
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// to endorse or promote products derived from this software without specific
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// prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// INTERRUPTION) HOWEVER CAUSED AND ONANY THEORY OF LIABILITY, WHETHER IN
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// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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// POSSIBILITY OF SUCH DAMAGE.
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//}}}
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kexec-bootloader(8)
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===================
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:man source: SUSE
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:man manual: User Manuals
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Bernhard Walle <bwalle@suse.de>
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Name
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----
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kexec-bootloader - Load kexec kernel from bootloader configuration
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Synopsis
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--------
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kexec-bootloader [-D]
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Description
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-----------
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kexec-bootloader takes the default section of bootloader configuration and
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loads that kernel, initrd with _kexec -l_ and the respective command line.
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Options
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-------
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*-h* | *--help*::
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Shows a short usage message.
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*-D* | *--debug*::
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Prints debugging output.
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*-o* _options_ | *--options* _options_::
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Specify additional _options_ passed to *kexec*(8).
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Return Value
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------------
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The program returns *0* on success and *1* on failure.
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Bugs
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----
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Please report bugs and enhancement requests at https://bugzilla.novell.com[].
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Copying
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-------
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Copyright (c) 2008 Bernhard Walle <bwalle@suse.de>. Free use of this software is
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granted under the terms of the GNU General Public License (GPL), version 2 or
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later.
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See also
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--------
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*kexec*(8)
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// vim: set sw=4 ts=4 et tw=80 fdm=marker: :collapseFolds=1:
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@ -1,3 +1,15 @@
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-------------------------------------------------------------------
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Sat Aug 16 11:04:55 CEST 2008 - bwalle@suse.de
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- mark /etc/init.d/kexec as %config
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- remove (empty) %preun
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-------------------------------------------------------------------
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Fri Aug 15 09:35:48 CEST 2008 - bwalle@suse.de
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- add /etc/init.d/kexec to be able to reboot with kexec(8)
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(FATE#302238)
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-------------------------------------------------------------------
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Sat Jul 19 16:54:57 CEST 2008 - bwalle@suse.de
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@ -2,9 +2,16 @@
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# spec file for package kexec-tools (Version 2.0.0)
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#
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# Copyright (c) 2008 SUSE LINUX Products GmbH, Nuernberg, Germany.
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# This file and all modifications and additions to the pristine
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# package are under the same license as the package itself.
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#
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# All modifications and additions to the file contributed by third parties
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# remain the property of their copyright owners, unless otherwise agreed
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# upon. The license for this file, and modifications and additions to the
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# file, is the same license as for the pristine package itself (unless the
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# license for the pristine package is not an Open Source License, in which
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# case the license is the MIT License). An "Open Source License" is a
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# license that conforms to the Open Source Definition (Version 1.9)
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# published by the Open Source Initiative.
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# Please submit bugfixes or comments via http://bugs.opensuse.org/
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#
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@ -17,15 +24,19 @@ BuildRequires: gcc-64bit glibc-devel-64bit
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%endif
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License: GPL v2 or later
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Group: System/Kernel
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Requires: %insserv_prereq %fillup_prereq
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Requires: perl-Bootloader
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PreReq: %insserv_prereq %fillup_prereq
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AutoReqProv: on
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Summary: Tools for fast kernel loading
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Version: 2.0.0
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Release: 1
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Release: 14
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Source: %{name}-%{version}.tar.bz2
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Source1: kexec-bootloader
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Source2: kexec-bootloader.8.txt
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Source3: kexec.init
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Url: http://ftp.kernel.org/pub/linux/kernel/people/horms/kexec-tools/
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BuildRoot: %{_tmppath}/%{name}-%{version}-build
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BuildRequires: zlib-devel
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BuildRequires: asciidoc zlib-devel
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%description
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Kexec is a user space utility for loading another kernel and asking the
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@ -62,25 +73,51 @@ CFLAGS=$RPM_OPT_FLAGS BUILD_CFLAGS=$RPM_OPT_FLAGS \
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--sbindir=/sbin \
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--libdir=/%_lib || true
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make
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# manpage
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cp %{S:1} .
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cp %{S:2} .
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cp %{S:3} .
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a2x -d manpage -f manpage kexec-bootloader.8.txt
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%install
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make DESTDIR=$RPM_BUILD_ROOT install
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mkdir -p $RPM_BUILD_ROOT%{_mandir}/man8
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install -c -m 0644 kexec/kexec.8 $RPM_BUILD_ROOT%{_mandir}/man8
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install -c -m 0644 kexec-bootloader.8 $RPM_BUILD_ROOT%{_mandir}/man8
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mkdir -p $RPM_BUILD_ROOT%{_sbindir}
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install -m 0755 kexec-bootloader $RPM_BUILD_ROOT%{_sbindir}
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mkdir -p ${RPM_BUILD_ROOT}/etc/init.d
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install -m 0755 kexec.init ${RPM_BUILD_ROOT}/etc/init.d/kexec
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%clean
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[ "$RPM_BUILD_ROOT" != "/" ] && rm -rf $RPM_BUILD_ROOT
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%post
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%{fillup_and_insserv -n kexec kexec}
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# %preun
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# no stop on removal because the "rckexec stop" actually loads kernel
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%postun
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%insserv_cleanup
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%files
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%defattr(-, root, root)
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%doc AUTHORS COPYING News TODO doc
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%doc %{_mandir}/man*/*
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/sbin/*
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%{_sbindir}/kexec-bootloader
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%config /etc/init.d/kexec
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%ifarch %ix86 x86_64
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/%_lib/kexec-tools*
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%endif
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%changelog
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* Sat Aug 16 2008 bwalle@suse.de
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- mark /etc/init.d/kexec as %%config
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- remove (empty) %%preun
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* Fri Aug 15 2008 bwalle@suse.de
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- add /etc/init.d/kexec to be able to reboot with kexec(8)
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(FATE#302238)
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* Sat Jul 19 2008 bwalle@suse.de
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- update to kexec-tools 2.0.0 (final)
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o Allow BUILD_CFLAGS and TARGET_CFLAGS to be specified at
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56
kexec.init
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56
kexec.init
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#!/bin/bash
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#
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# Copyright (c) 2008 SUSE LINUX Products GmbH
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# Author: Bernhard Walle <bwalle@suse.de>
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#
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### BEGIN INIT INFO
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# Provides: kexec
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# Required-Start: $remote_fs
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# Should-Start:
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# Should-Stop:
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# Required-Stop: $remote_fs
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# Default-Start: $null
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# Default-Stop: 1 2 3 5
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# Short-Description: Enables reboot through kexec
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# Description: Enables reboot through kexec
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### END INIT INFO
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. /etc/rc.status
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KEXEC_BOOTLOADER=/usr/sbin/kexec-bootloader
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case "$1" in
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start)
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;;
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stop)
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if ! [ -f /sys/kernel/kexec_loaded ] ; then
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echo -n "Cannot check if kexec kernel has been loaded."
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rc_failed
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else
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read -t 2 kexec_loaded < /sys/kernel/kexec_loaded
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if [ "$kexec_loaded" -ne 0 ] ; then
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echo -n "kexec kernel already loaded."
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rc_status -s
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else
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echo -n "Loading kexec kernel for reboot ..."
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$KEXEC_BOOTLOADER
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rc_status -v
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fi
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fi
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;;
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status)
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echo "not implemented"
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rc_status -s
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;;
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restart|reload)
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$0 stop
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$0 start
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;;
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*)
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echo $"Usage: $0 {start|stop|status|restart|reload|try-reload}"
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exit 1
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esac
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rc_exit
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# vim: set ts=4 sw=4 et: :mode=shellscript:
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