Dump FreeBSD sysctl descriptions as markdown

freebsd_dump_sysctl.sh

#!/bin/sh

# Function for printing
p()
{
  KEY=$1
  TYPE=$2
  DESCR=$3

  # last character is '.'
  if [ $(echo "$KEY" | egrep -c '\.$') -ge 1 ]; then
    return
  fi

  # No description
  if [ -z "$DESCR" ]; then
    return
  fi

  # key has something.1.something
  if [ $(echo "$KEY" | egrep -c '\.[0-9]+\.') -ge 1 ]; then
    return
  fi

  echo "## $TYPE \`$item\`"
  echo "$DESCR"
  echo ""

}

echo "# Settable via \`/etc/sysctl.conf\`:"
echo ""

VARIABLES=$(sysctl -aNW)

for item in $VARIABLES
do
  p "$item" "$(sysctl -tn $item)" "$(sysctl -dn $item)"
done

echo "# Settable via \`/boot/loader.conf\`:"
echo ""

VARIABLES=$(sysctl -aNT)

for item in $VARIABLES
do
  p "$item" "$(sysctl -tn $item)" "$(sysctl -dn $item)"
done

See https://gist.github.com/raspi/a93d149b3916f4c12bbb9a52fe575f93