Tinyramfs

Currently tinyramfs is incomplete, don't expect that everything is working

Features

• No local's, no bashisms, only POSIX shell
• Easy configuration
• mdev, mdevd, eudev
• LUKS, LVM
• LUKS detached header and key embedded into initramfs

Dependencies

• POSIX utilities ( find, mkdir, ... )
• POSIX shell
• switch_root
• readlink
• install
• setsid
• mount
• blkid
• cpio
• strip
  • Optional
• gzip
  • Required by default
• mdev OR mdevd OR eudev
  • systemd-udevd not tested
• lvm2
  • Required for LVM support
• cryptsetup
  • Required for LUKS support
• kmod OR busybox modutils with this patch (already included in KISS Linux)
  • Not required for monolithic kernel

Notes

• busybox modutils doesn't handle soft dependencies (modules.softdep). You must manually include them using modules config option
• busybox and toybox blkid doesn't support PARTUUID. You must use util-linux blkid
• zsh (in POSIX mode) shows some errors in init stage. Just ignore these errors, it's harmless
• cp in toybox incorrectly handles -P flag. You need to apply patch from this issue or replace cp with another implementation

Installation

git clone https://github.com/illiliti/tinyramfs
cd tinyramfs
make install
vi /etc/tinyramfs/config # edit config for your needs
tinyramfs -o /boot/initramfs
# update your bootloader
# reboot...

Usage

usage: tinyramfs [option]
       -o, --output <file>  set initramfs output path
       -c, --config <file>  set config file path
       -m, --moddir <dir>   set modules directory
       -k, --kernel <ver>   set kernel version
       -F, --files  <dir>   set files directory
       -d, --debug          enable debug mode
       -f, --force          overwrite initramfs image

Configuration

Statically via config

See config

Dynamically via kernel parameters

TODO finalize and document kernel command-line parameters

Thanks

E5ten
dylanaraps

License

Licensed under GPLv3