[Bug 2036886] Re: please add api to repack initramfs

[Dimitri John Ledkov]

** Description changed:

  please add api to repack initramfs
  
- from the results of unpackinitramfs, including all early & main dirs
+ from the results of unpackinitramfs, including all early & main dirs.
+ 
+ Userstory: i want to tweak my initrd in-place by replacing broken
+ libc.so.6 with a patched one, I want to use unmkinitramfs, modify files
+ in main, repack it and boot it.
+ 
+ CLI:
+ 
+ $ unmkinitramfs /boot/initrd.img unpacked-initrd
+ $ ls unpacked-initrd/
+ early  early2  main
+ $ (edit things in unpacked-initrd/main/)
+ $ remkinitramfs unpacked-initrd patched-initrd.img
+ 
+ Where patched-initrd.img is now similar to /boot/initrd.img, apart from
+ the changed things.
+ 
+ I expect remkinitramfs like functionality that will take the output of
+ unmkinitramfs (e.g. unpacked-initrd/) directory as input, do
+ uncompressed cpio archives out of all the subdirs, make compressed cpio
+ archive out of main, and produce a patched-initrd.img that is ready for
+ booting.
+ 
+ It is very close to what mkinitramfs does, but skip calling all the
+ hooks to create things a fresh, and just do the final assembly step of
+ cpio and compression.

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to initramfs-tools in Ubuntu.
https://bugs.launchpad.net/bugs/2036886

Title:
  please add api to repack initramfs

Status in initramfs-tools package in Ubuntu:
  New

Bug description:
  please add api to repack initramfs

  from the results of unpackinitramfs, including all early & main dirs.

  Userstory: i want to tweak my initrd in-place by replacing broken
  libc.so.6 with a patched one, I want to use unmkinitramfs, modify
  files in main, repack it and boot it.

  CLI:

  $ unmkinitramfs /boot/initrd.img unpacked-initrd
  $ ls unpacked-initrd/
  early  early2  main
  $ (edit things in unpacked-initrd/main/)
  $ remkinitramfs unpacked-initrd patched-initrd.img

  Where patched-initrd.img is now similar to /boot/initrd.img, apart
  from the changed things.

  I expect remkinitramfs like functionality that will take the output of
  unmkinitramfs (e.g. unpacked-initrd/) directory as input, do
  uncompressed cpio archives out of all the subdirs, make compressed
  cpio archive out of main, and produce a patched-initrd.img that is
  ready for booting.

  It is very close to what mkinitramfs does, but skip calling all the
  hooks to create things a fresh, and just do the final assembly step of
  cpio and compression.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/initramfs-tools/+bug/2036886/+subscriptions