X-Git-Url: http://git.grml.org/?a=blobdiff_plain;f=grml2usb.py;h=b4c971fc9e099240b9ba380296e1ea2cee3be494;hb=64bbc51ac9ee052ee3c310226d84ab735f5f7fe5;hp=2efedc3303f1c494f1a8ed1038a95626560310c5;hpb=0fc003be380db399edfd456fb324cf9a56835fa4;p=grml2usb.git

diff --git a/grml2usb.py b/grml2usb.py
index 2efedc3..b4c971f 100755
--- a/grml2usb.py
+++ b/grml2usb.py
@@ -1,18 +1,34 @@
 #!/usr/bin/env python
 # Filename:      grml2usb
-# Purpose:       install grml-system to usb-device
+# 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:
+# * write error messages to stderr
+# * log wrapper (log important messages to syslog, depending on loglevel)
+# * trap handling (umount devices when interrupting?)
+# * 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, sys
+import os, re, subprocess, sys
 from optparse import OptionParser
+from os.path import exists, join, abspath
+from os import pathsep
+from string import split
 
 # cmdline parsing {{{
-usage = "usage: %prog [options] arg1 arg2"
+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",
@@ -33,6 +49,8 @@ parser.add_option("--mbr", dest="mbr", action="store_true",
                   help="install master boot record (MBR) on the device")
 parser.add_option("--squashfs", dest="squashfs", action="store", type="string",
                   help="install specified squashfs file instead of the default")
+parser.add_option("--uninstall", dest="uninstall", action="store_true",
+                  help="remove grml ISO files")
 parser.add_option("--verbose", dest="verbose", action="store_true",
                   help="enable verbose mode")
 parser.add_option("-v", "--version", dest="version", action="store_true",
@@ -41,7 +59,8 @@ parser.add_option("-v", "--version", dest="version", action="store_true",
 (options, args) = parser.parse_args()
 # }}}
 
-# FIXME: implement argument handling
+# wrapper functions {{{
+# TODO: implement argument handling
 def execute(command):
     """Wrapper for executing a command. Either really executes
     the command (default) or when using --dry-run commandline option
@@ -51,25 +70,135 @@ def execute(command):
     else:
         print "executing %s" % command
 
+def which(program):
+    def is_exe(fpath):
+        return os.path.exists(fpath) and os.access(fpath, os.X_OK)
+
+    fpath, fname = os.path.split(program)
+    if fpath:
+        if is_exe(program):
+            return program
+    else:
+        for path in os.environ["PATH"].split(os.pathsep):
+            exe_file = os.path.join(path, program)
+            if is_exe(exe_file):
+                return exe_file
+
+    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
+# }}}
+
+
+def check_uid_root():
+    """Check for root permissions"""
+    if not os.geteuid()==0:
+        sys.exit("Error: please run this script with uid 0 (root).")
+
+
 def install_syslinux(device):
     """Install syslinux on specified device."""
-    print("syslinux %s") % device
+    print("debug: syslinux %s") % device
+
 
 def install_grub(device):
     """Install grub on specified device."""
     print("grub-install %s") % device
 
-def install_bootloader(device):
-    """Install bootloader on specified device."""
+
+def install_bootloader(partition):
+    """Install bootloader on device."""
+    # 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:
+        device = partition
+
     if options.grub:
         install_grub(device)
     else:
         install_syslinux(device)
 
-def check_uid_root():
-    """Check for root permissions"""
-    if not os.geteuid()==0:
-        sys.exit("Error: please run this script with uid 0 (root).")
+
+def install_mbr(target):
+    """Install a default master boot record on given target"""
+    print("TODO")
+
+
+def loopback_mount(iso, target):
+    """Loopback mount specified ISO on given target"""
+    print("mount -o loop %s %s") % (iso, target)
+
+
+def check_for_vat(partition):
+    """Check whether specified partition is VFAT/FAT16 filesystem"""
+    try:
+        udev_info = subprocess.Popen(["/lib/udev/vol_id", "-t",
+            partition],stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+        filesystem = udev_info.communicate()[0].rstrip()
+
+        if udev_info.returncode == 2:
+            print("failed to read device %s - wrong UID / permissions?") % partition
+            return 1
+
+        if filesystem != "vfat":
+            return(1)
+
+        # TODO: check for ID_FS_VERSION=FAT16?
+
+    except OSError:
+        print("Sorry, /lib/udev/vol_id not available.")
+        return 1
+
+def copy_grml_files(grml_flavour, iso_mount, target):
+    """Copy files from ISO on given target"""
+
+    # TODO: provide alternative search_file() if file information is stored in
+    # a config.ini file?
+    squashfs = search_file(grml_flavour + '.squashfs', iso_mount)
+    print("debug: copy squashfs to %s") % target + '/live/' + grml_flavour + '.squashfs'
+
+    filesystem_module = search_file('filesystem.module', iso_mount)
+    print("debug: copy filesystem.module to %s") % target + '/live/' + grml_flavour + '.module'
+
+    kernel = search_file('linux26', iso_mount)
+    print("debug: copy kernel to %s") % target + '/boot/release/' + grml_flavour + '/linux26'
+
+    initrd = search_file('initrd.gz', iso_mount)
+    print("debug: copy initrd to %s") % target + '/boot/release/' + grml_flavour + '/initrd.gz'
+
+    logo = search_file('logo.16', iso_mount)
+    print("debug: copy logo.16 to %s") % target + '/boot/isolinux/' + '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, target + '/boot/isolinux/' + file)
+
+
+def uninstall_files(device):
+    print("TODO")
+
+
+def identify_grml_flavour(mountpath):
+    version_file = search_file('grml-version', mountpath)
+    file = open(version_file, 'r')
+    grml_info = file.readline()
+    file.close
+    grml_flavour = re.match(r'[\w-]*', grml_info).group()
+    return grml_flavour
+
 
 def main():
     if options.version:
@@ -84,15 +213,41 @@ def main():
     device = args[len(args) - 1]
     isos = args[0:len(args) - 1]
 
-    # FIXME: check for valid blockdevice
-    if device is not None:
-        install_bootloader(device)
+    if not which("syslinux"):
+        print("Sorry, syslinux not available. Exiting.")
+        print("Please install syslinux or consider using the --grub option.")
+        sys.exit(1)
+
+    # TODO check for valid blockdevice, vfat and mount functions
+    # if device is not None:
+        # check_for_vat(device)
+        # mount_target(partition)
 
+    target = '/mnt/target'
+
+    # TODO it doesn't need to be a ISO, could be /live/image as well
     for iso in isos:
-        print("iso = %s") % iso
+        print("debug: iso = %s") % iso
+        # loopback_mount(iso)
+        # 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)
+
+    if options.mbr:
+        print("debug: would install MBR now")
+
+    install_bootloader(device)
 
 if __name__ == "__main__":
     main()
 
 ## END OF FILE #################################################################
-# vim:foldmethod=marker expandtab ai ft=python
+# vim:foldmethod=marker expandtab ai ft=python tw=120