mirror of
https://github.com/flatcar/scripts.git
synced 2025-08-07 21:16:57 +02:00
e79e88eb0e
Added the flags required for mounted images to the postinst call. Scripts no longer need to fixup postinst hence that code is removed. Review URL: http://codereview.chromium.org/3027012
113 lines
3.6 KiB
Python
Executable File
113 lines
3.6 KiB
Python
Executable File
#!/usr/bin/env python
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# Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
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# Use of this source code is governed by a BSD-style license that can be
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# found in the LICENSE file.
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"""Makes changes to mounted Chromium OS image to allow it to run with VMs
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This script changes two files within the Chromium OS image to let the image
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work with VMs, particularly QEMU
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Currently this script does the following,
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1.) Modify the post install script to remove EFI fixup section; the VM's we
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support don't have EFI support anyway and this section of the script needs
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access to the actual device drives
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2.) For QEMU/KVM, we change the xorg.conf to remove mouse support and instead
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change it to complete tablet support. This is done to provide better mouse
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response in the VM since tablets work of absolute coordinates while the mouse
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works of relative. In a screen that doesn't support a mouse grab (e.g., VNC),
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relative coordinates can cause the mouse to be flaky
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"""
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from optparse import OptionParser
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import os
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import stat
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import sys
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USAGE = "usage: %prog --mounted_dir=directory --enable_tablet=[true]"
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INPUT_SECTION_MARKER = r'Section "InputDevice"'
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SECTION_END_MARKER = r'EndSection'
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MOUSE_SECTION_IDENTIFIERS = []
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MOUSE_SECTION_IDENTIFIERS += ['Identifier "Mouse']
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MOUSE_SECTION_IDENTIFIERS += ['Identifier "USBMouse']
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REPLACE_USB_MOUSE_PAIR = ('InputDevice "USBMouse" "AlwaysCore"', '')
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XORG_CONF_FILENAME = os.path.join('etc', 'X11', 'xorg.conf')
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TABLET_DEVICE_CONFIG = """
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Section "InputDevice"
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Identifier "Mouse1"
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Driver "evdev"
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Option "Device" "/dev/input/event2"
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Option "CorePointer" "true"
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EndSection
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"""
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# Modify the xorg.conf file to remove all mouse sections and replace it
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# with ours containing the tablet - note: when running under QEMU, you
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# *need* to specify the -usbdevice tablet option to get the mouse to work
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def FixXorgConf(mount_point):
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xorg_conf_filename = os.path.join(mount_point, XORG_CONF_FILENAME)
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f = open(xorg_conf_filename, 'r')
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xorg_conf = f.read()
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f.close()
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more_sections = 1
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last_found = 0
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while (more_sections):
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# Find the input section.
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m1 = xorg_conf.find(INPUT_SECTION_MARKER, last_found)
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if m1 > -1:
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m2 = xorg_conf.find(SECTION_END_MARKER, m1)
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m2 += len(SECTION_END_MARKER)
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# Make sure the next iteration doesn't rinse/repeat.
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last_found = m2
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# Check if this is a mouse section.
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for ident in MOUSE_SECTION_IDENTIFIERS:
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if xorg_conf.find(ident, m1, m2) != -1:
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xorg_conf = xorg_conf[0:m1] + xorg_conf[m2:]
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last_found -= (m2-m1)
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break
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else:
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more_sections = 0
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xorg_conf = xorg_conf[0:last_found] + TABLET_DEVICE_CONFIG + \
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xorg_conf[last_found:]
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# Replace UsbMouse with Tablet.
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xorg_conf = xorg_conf.replace(REPLACE_USB_MOUSE_PAIR[0],
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REPLACE_USB_MOUSE_PAIR[1])
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# Write the file back out.
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f = open(xorg_conf_filename, 'w')
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f.write(xorg_conf)
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f.close()
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def main():
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parser = OptionParser(USAGE)
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parser.add_option('--mounted_dir', dest='mounted_dir',
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help='directory where the Chromium OS image is mounted')
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parser.add_option('--enable_tablet', dest='enable_tablet',
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default="true",
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help='fixup image for qemu')
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(options, args) = parser.parse_args()
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if not options.mounted_dir:
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parser.error("Please specify the mount point for the Chromium OS image");
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if options.enable_tablet not in ('true', 'false'):
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parser.error("Please specify either true or false for --enable_tablet")
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if (options.enable_tablet == 'true'):
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FixXorgConf(options.mounted_dir)
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if __name__ == '__main__':
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main()
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