Linux kernel development shell scripts

Published 2016-07-26

A part of getting active in kernel development is finding a good workflow. These are the scripts I've used to avoid errors and increase productivity.

Alt text

While upstreaming kernel patches scripts/checkpatch.pl and scripts/get_maintainer.pl often come in handy. But to me the interface they provide is slightly bulky and rely on using patch files instead of git commits, which to me is a bit inconvenient.

These scripts are all meant to be included in .bashrc or .zshrc

scripts/checkpatch.pl helper

#!/bin/bash
function checkpatch {
  if [ -z ${1+x} ]; then
    exec git diff | scripts/checkpatch.pl --no-signoff -q -
  elif [[ $1 == *"cache"* ]]; then
    exec git diff --cached | scripts/checkpatch.pl --no-signoff -q -
  else
    NUM_COMMITS=$1
    exec git diff HEAD~$NUM_COMMITS..HEAD | scripts/checkpatch.pl --no-signoff -q -
  fi
}

The checkpatch script simply wraps the patch creation process and allows you to right away specify which

Example

~/work/linux $ checkpatch 15
WARNING: ENOSYS means 'invalid syscall nr' and nothing else
#349: FILE: drivers/tty/serial/sh-sci.c:3026:
+   if (IS_ERR(sciport->gpios) && PTR_ERR(sciport->gpios) != -ENOSYS)

total: 0 errors, 1 warnings, 385 lines checked

In this example the 15 last commits are checked against scripts/checkpatch.pl for correctness.

scripts/get_maintainer.pl helper

#!/bin/bash
function get_maintainer {
  NUM_COMMITS=$1

  MAINTAINERS=$(git format-patch HEAD~$NUM_COMMITS..HEAD --stdout | scripts/get_maintainer.pl)

  # Remove extraneous stats
  MAINTAINERS=$(echo "$MAINTAINERS" | sed 's/(.*//g')

  # Remove names from email addresses
  MAINTAINERS=$(echo "$MAINTAINERS" | sed 's/.*<//g')

  # Remove left over character
  MAINTAINERS=$(echo "$MAINTAINERS" | sed 's/>//g')

  echo "$MAINTAINERS" | while read email; do
    echo -n "--to=${email}  ";
  done
}

Example

~/work/linux $ get_maintainer 1
--to=gregkh@linuxfoundation.org  --to=jslaby@suse.com  --to=linux-serial@vger.kernel.org  --to=linux-kernel@vger.kernel.org

~/work/linux $ git send-email -1 $(get_maintainer 1)