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fix(disk_util): Install syslinux with extlinux

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Attempting to work around an apparent race in mtools, the command
'extlinux' these days is just the install tool for mounted partitions
while 'syslinux' is for unmounted devices.
This commit is contained in:
Michael Marineau 2014-06-18 14:20:29 -07:00
parent 108fdebac2
commit 919ba5a3b9
1 changed files with 8 additions and 3 deletions
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11
build_library/disk_util
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@ -412,16 +412,21 @@ def FormatFat(part, device):
stdout_null=True) stdout_null=True)
if 'syslinux' in part.get('features', []): if 'syslinux' in part.get('features', []):
# The syslinux directory must exist before installing ldlinux.sys to it. # Install using extlinux so we can operate on the mounted filesystem and
# avoid possible issues with mtools. Also hpa told me to. :)
# cgpt uses 255 heads and 63 sectors when generating the hybrid MBR which
# doesn't actually have to match what we use here but doesn't hurt either.
vfat_mount = tempfile.mkdtemp() vfat_mount = tempfile.mkdtemp()
syslinux_dir = os.path.join(vfat_mount, 'syslinux')
Sudo(['mount', '-t', 'vfat', device, vfat_mount]) Sudo(['mount', '-t', 'vfat', device, vfat_mount])
try: try:
Sudo(['mkdir', os.path.join(vfat_mount, 'syslinux')]) Sudo(['mkdir', syslinux_dir])
Sudo(['extlinux', '--heads=255', '--sectors=63',
'--install', syslinux_dir])
finally: finally:
Sudo(['umount', vfat_mount]) Sudo(['umount', vfat_mount])
os.rmdir(vfat_mount) os.rmdir(vfat_mount)
Sudo(['syslinux', '-d', '/syslinux', device])
print "Installed SYSLINUX to %s" % part['label'] print "Installed SYSLINUX to %s" % part['label']