#!/usr/bin/env python
-# Filename: grml2usb
-# Purpose: install grml system to usb device
-# Authors: grml-team (grml.org), (c) Michael Prokop <mika@grml.org>
-# Bug-Reports: see http://grml.org/bugs/
-# License: This file is licensed under the GPL v2 or any later version.
-################################################################################
-
-# TODO:
-# * strongly improve error handling :)
-# * implement mount handling
-# * write error messages to stderr
-# * log wrapper (log important messages to syslog, depending on loglevel -> logging module)
-# * trap handling (umount devices when interrupting?)
-# * provide progress bar?
-# * graphical version?
-# * integrate https://www.mirbsd.org/cvs.cgi/src/sys/arch/i386/stand/mbr/mbr.S?rev=HEAD;content-type=text%2Fplain ?
-# -> gcc -D_ASM_SOURCE -D__BOOT_VER=\"GRML\" -DBOOTMANAGER -c mbr.S; ld
-# -nostdlib -Ttext 0 -N -Bstatic --oformat binary mbr.o -o mbrmgr
-
-prog_version = "0.0.1"
-
-import os, re, subprocess, sys
+# -*- coding: utf-8 -*-
+"""
+grml2usb
+~~~~~~~~
+
+This script installs a grml system to a USB device
+
+:copyright: (c) 2009 by Michael Prokop <mika@grml.org>
+:license: GPL v2 or any later version
+:bugreports: http://grml.org/bugs/
+
+TODO
+----
+
+* improve error handling :)
+* implement mount handling
+* log wrapper (-> logging module)
+* implement logic for storing information about copied files
+ -> register every single file?
+* trap handling (like unmount devices when interrupting?)
+* get rid of all TODOs in code :)
+* graphical version
+"""
+
+import os, re, subprocess, sys, tempfile
from optparse import OptionParser
from os.path import exists, join, abspath
from os import pathsep
+# TODO string.split() is deprecated - replace?
+# -> http://docs.python.org/library/string.html#deprecated-string-functions
from string import split
-# cmdline parsing {{{
+PROG_VERSION = "0.0.1"
+
+# cmdline parsing
+# TODO
+# * --copy-only?
+# * --bootloader-only?
usage = "Usage: %prog [options] <ISO[s]> <partition>\n\
\n\
%prog installs a grml ISO to an USB device to be able to boot from it.\n\
Make sure you have at least a grml ISO or a running grml system,\n\
syslinux (just run 'aptitude install syslinux' on Debian-based systems)\n\
and root access."
-parser = OptionParser(usage=usage)
-parser.add_option("--bootoptions", dest="bootoptions", action="store", type="string",
+parser = OptionParser(usage=usage)
+parser.add_option("--bootoptions", dest="bootoptions",
+ action="store", type="string",
help="use specified bootoptions as defaut")
parser.add_option("--dry-run", dest="dryrun", action="store_true",
help="do not actually execute any commands")
help="enable verbose mode")
parser.add_option("-v", "--version", dest="version", action="store_true",
help="display version and exit")
-# }}}
+(options, args) = parser.parse_args()
-# wrapper functions {{{
-# TODO: implement argument handling
-def execute(command):
+
+def execute(f, *args):
"""Wrapper for executing a command. Either really executes
the command (default) or when using --dry-run commandline option
just displays what would be executed."""
+ # demo: execute(subprocess.Popen, (["ls", "-la"]))
if options.dryrun:
- print "would execute %s now" % command
+ print "would execute %s(%s) now" % (f, args)
else:
- # TODO: actual execution ;)
- print "executing %s" % command
+ return f(*args)
+
+
+def is_exe(fpath):
+ """Check whether a given file can be executed
+
+ @fpath: full path to file
+ @return:"""
+ return os.path.exists(fpath) and os.access(fpath, os.X_OK)
+
def which(program):
- def is_exe(fpath):
- return os.path.exists(fpath) and os.access(fpath, os.X_OK)
+ """Check whether a given program is available in PATH
+ @program: name of executable"""
fpath, fname = os.path.split(program)
if fpath:
if is_exe(program):
return None
+
def search_file(filename, search_path='/bin' + pathsep + '/usr/bin'):
- """Given a search path, find file"""
- file_found = 0
- paths = split(search_path, pathsep)
- for path in paths:
- for current_dir, directories, files in os.walk(path):
- if exists(join(current_dir, filename)):
- file_found = 1
- break
- if file_found:
- return abspath(join(current_dir, filename))
- else:
- return None
-# }}}
+ """Given a search path, find file"""
+ file_found = 0
+ paths = split(search_path, pathsep)
+ for path in paths:
+ for current_dir, directories, files in os.walk(path):
+ if exists(join(current_dir, filename)):
+ file_found = 1
+ break
+ if file_found:
+ return abspath(join(current_dir, filename))
+ else:
+ return None
def check_uid_root():
def install_syslinux(device):
+ # TODO
"""Install syslinux on specified device."""
print("debug: syslinux %s [TODO]") % device
+ # syslinux -d boot/isolinux /dev/usb-sdb1
+
def generate_grub_config(grml_flavour):
"""Generate grub configuration for use via menu,lst"""
- # TODO:
+ # TODO
# * what about system using grub2 without having grub available?
# * support grub2
def generate_isolinux_splash(grml_flavour):
"""Generate bootsplash for isolinux/syslinux"""
- # TODO:
+ # TODO
# * adjust last bootsplash line
grml_name = grml_flavour
def generate_syslinux_config(grml_flavour):
"""Generate configuration for use in syslinux.cfg"""
- # TODO:
+ # TODO
# * unify isolinux and syslinux setup ("INCLUDE /boot/...")
grml_name = grml_flavour
def install_bootloader(partition):
"""Install bootloader on device."""
- # Install bootloader on the device (/dev/sda), not on the partition itself (/dev/sda1)
+ # Install bootloader on the device (/dev/sda),
+ # not on the partition itself (/dev/sda1)
if partition[-1:].isdigit():
device = re.match(r'(.*?)\d*$', partition).group(1)
else:
install_syslinux(device)
-def install_mbr(target):
- """Install a default master boot record on given target"""
- print("TODO")
+def is_writeable(device):
+ """Check if the device is writeable for the current user"""
+
+ if not device:
+ return False
+ #raise Exception, "no device for checking write permissions"
+
+ if not os.path.exists(device):
+ return False
+
+ return os.access(device, os.W_OK) and os.access(device, os.R_OK)
+
+def install_mbr(device):
+ """Install a default master boot record on given device
+
+ @device: device where MBR should be installed to"""
+
+ if not is_writeable(device):
+ raise IOError, "device not writeable for user"
+
+ lilo = './lilo/lilo.static' # FIXME
+
+ if not is_exe(lilo):
+ raise Exception, "lilo executable not available."
+
+ # to support -A for extended partitions:
+ print("debug: ./lilo/lilo.static -S /dev/null -M %s ext") % device
+ proc = subprocess.Popen(["./lilo/lilo.static", "-S", "/dev/null", "-M", device, "ext"])
+ proc.wait()
+ if proc.returncode != 0:
+ raise Exception, "error executing lilo"
+
+ # activate partition:
+ print("debug: ./lilo/lilo.static -S /dev/null -A %s 1") % device
+ proc = subprocess.Popen(["./lilo/lilo.static", "-S", "/dev/null", "-A", device, "1"])
+ proc.wait()
+ if proc.returncode != 0:
+ raise Exception, "error executing lilo"
+
+ # lilo's mbr is broken, use the one from syslinux instead:
+ print("debug: cat /usr/lib/syslinux/mbr.bin > %s") % device
+ try:
+ # TODO use Popen instead?
+ retcode = subprocess.call("cat /usr/lib/syslinux/mbr.bin > "+ device, shell=True)
+ if retcode < 0:
+ print >> sys.stderr, "Error copying MBR to device", -retcode
+ except OSError, error:
+ print >> sys.stderr, "Execution failed:", error
- # Command logic (all executed *without* mounted device):
- # lilo -S /dev/null -M /dev/usb-sdb ext
- # lilo -S /dev/null -A /dev/usb-sdb 1
- # cat /usr/lib/syslinux/mbr.bin > /dev/usb-sdb
- # syslinux -d boot/isolinux /dev/usb-sdb1
def loopback_mount(iso, target):
- """Loopback mount specified ISO on given target"""
+ """Loopback mount specified ISO on given target
+
+ @iso: name of ISO that should be mounted
+ @target: directory where the ISO should be mounted to"""
print("mount -o loop %s %s") % (iso, target)
def check_for_vat(partition):
- """Check whether specified partition is VFAT/FAT16 filesystem"""
+ """Check whether specified partition is a valid VFAT/FAT16 filesystem
+
+ @partition: device name of partition"""
try:
udev_info = subprocess.Popen(["/lib/udev/vol_id", "-t",
if filesystem != "vfat":
return(1)
- # TODO: check for ID_FS_VERSION=FAT16 as well?
+ # TODO
+ # * check for ID_FS_VERSION=FAT16 as well?
except OSError:
print("Sorry, /lib/udev/vol_id not available.")
def mkdir(directory):
"""Simple wrapper around os.makedirs to get shell mkdir -p behaviour"""
+
if not os.path.isdir(directory):
try:
os.makedirs(directory)
except OSError:
+ # just silently pass as it's just fine it the directory exists
pass
def copy_grml_files(grml_flavour, iso_mount, target):
"""Copy files from ISO on given target"""
- # TODO:
+ # TODO
# * provide alternative search_file() if file information is stored in a config.ini file?
# * catch "install: .. No space left on device" & CO
# * abstract copy logic to make the code shorter?
print("debug: copy logo.16 to %s") % isolinux_target + 'logo.16'
subprocess.Popen(["install", "--mode=664", logo, isolinux_target + 'logo.16'])
- for file in 'f2', 'f3', 'f4', 'f5', 'f6', 'f7', 'f8', 'f9', 'f10':
- bootsplash = search_file(file, iso_mount)
- print("debug: copy %s to %s") % (bootsplash, isolinux_target + file)
- subprocess.Popen(["install", "--mode=664", bootsplash, isolinux_target + file])
+ for ffile in 'f2', 'f3', 'f4', 'f5', 'f6', 'f7', 'f8', 'f9', 'f10':
+ bootsplash = search_file(ffile, iso_mount)
+ print("debug: copy %s to %s") % (bootsplash, isolinux_target + ffile)
+ subprocess.Popen(["install", "--mode=664", bootsplash, isolinux_target + ffile])
grub_target = target + '/boot/grub/'
mkdir(grub_target)
def uninstall_files(device):
"""Get rid of all grml files on specified device"""
- print("TODO")
+ # TODO
+ print("TODO: %s") % device
def identify_grml_flavour(mountpath):
- """Get name of grml flavour"""
+ """Get name of grml flavour
+
+ @mountpath: path where the grml ISO is mounted to
+ @return: name of grml-flavour"""
version_file = search_file('grml-version', mountpath)
- file = open(version_file, 'r')
- grml_info = file.readline()
- file.close
+
+ tmpfile = open(version_file, 'r')
+ grml_info = tmpfile.readline()
+ #tmpfile.close # pylint: Statement seems to have no effect
+
grml_flavour = re.match(r'[\w-]*', grml_info).group()
return grml_flavour
def main():
- (options, args) = parser.parse_args()
+ """Main function [make pylint happy :)]"""
if options.version:
- print("%s %s")% (os.path.basename(sys.argv[0]), prog_version)
+ print("%s %s")% (os.path.basename(sys.argv[0]), PROG_VERSION)
sys.exit(0)
if len(args) < 2:
isos = args[0:len(args) - 1]
if not which("syslinux"):
- print("Sorry, syslinux not available. Exiting.")
- print("Please install syslinux or consider using the --grub option.")
+ print >> sys.stderr, 'Sorry, syslinux not available. Exiting.'
+ print >> sys.stderr, 'Please install syslinux or consider using the --grub option.'
sys.exit(1)
- # TODO check for valid blockdevice, vfat and mount functions
+ # TODO
+ # * check for valid blockdevice, vfat and mount functions
# if device is not None:
# check_for_vat(device)
# mount_target(partition)
- # FIXME
- target = '/mnt/usb-sdb1'
+ # TODO
+ # target = '/mnt/usb-sdb1'
+ target = tempfile.mkdtemp()
+ print("debug: target = %s") % target
- # TODO it doesn't need to be a ISO, could be /live/image as well
+ # TODO
+ # * it doesn't need to be a ISO, could be /live/image as well
for iso in isos:
print("debug: iso = %s") % iso
# loopback_mount(iso)
+ iso_mount = '/mnt/test' # FIXME
+ loopback_mount(iso, target) # FIXME s/target/iso_mount/
# copy_grml_files(iso, target)
# loopback_unmount(iso)
- iso_mount = '/mnt/test' # FIXME
grml_flavour = identify_grml_flavour(iso_mount)
print("debug: grml_flavour = %s") % grml_flavour
grml_flavour_short = grml_flavour.replace('-','')
print("debug: grml_flavour_short = %s") % grml_flavour_short
- copy_grml_files(grml_flavour, iso_mount, target)
-
+ # TODO - re-enable :)
+ # copy_grml_files(grml_flavour, iso_mount, target)
if options.mbr:
- print("debug: would install MBR now")
+ # make sure we install MBR on /dev/sdX and not /dev/sdX#
+ if device[-1:].isdigit():
+ device = re.match(r'(.*?)\d*$', device).group(1)
+
+ try:
+ install_mbr(device)
+ except IOError, error:
+ print >> sys.stderr, "Execution failed:", error
+ sys.exit(1)
+ except Exception, error:
+ print >> sys.stderr, "Execution failed:", error
+ sys.exit(1)
install_bootloader(device)
+ if os.path.isdir(target):
+ os.rmdir(target)
+
if __name__ == "__main__":
main()
## END OF FILE #################################################################
-# vim:foldmethod=marker expandtab ai ft=python tw=120
+# vim:foldmethod=marker expandtab ai ft=python tw=120 fileencoding=utf-8
projects / grml2usb.git / blobdiff