blob: 9b53dfba7abf7a210cf07f7f91a7762caff2b620 [file] [log] [blame]
lh9ed821d2023-04-07 01:36:19 -07001# Extract UUID from ${ROOTFS}, which must have been built
2# by the time that this function gets called. Only works
3# on ext file systems and depends on tune2fs.
4def get_rootfs_uuid(d):
5 import subprocess
6 rootfs = d.getVar('ROOTFS')
7 output = subprocess.check_output(['tune2fs', '-l', rootfs])
8 for line in output.split('\n'):
9 if line.startswith('Filesystem UUID:'):
10 uuid = line.split()[-1]
11 bb.note('UUID of %s: %s' % (rootfs, uuid))
12 return uuid
13 bb.fatal('Could not determine filesystem UUID of %s' % rootfs)
14
15# Replace the special <<uuid-of-rootfs>> inside a string (like the
16# root= APPEND string in a syslinux.cfg or systemd-boot entry) with the
17# actual UUID of the rootfs. Does nothing if the special string
18# is not used.
19def replace_rootfs_uuid(d, string):
20 UUID_PLACEHOLDER = '<<uuid-of-rootfs>>'
21 if UUID_PLACEHOLDER in string:
22 uuid = get_rootfs_uuid(d)
23 string = string.replace(UUID_PLACEHOLDER, uuid)
24 return string