prop

gistfile1.txt

#!/bin/bash
if test -z $1
then
  echo "Usage: prop <mode> <file> <prop> [value]"
  echo "mode = get / set"
  echo "file = your .prop file"
  echo "prop = something like ro.build.blah"
  echo "value = only if using set, define value there."
  exit 1
fi

if test $1 = "get"
then
  if test -z $(cat $2 | grep $3=)
  then
    echo "ERROR: this prop is not defined. Use prop set"
    exit 1
  fi

  echo $(cat $2 | grep $3=)
  exit 0
fi

if test $1 = "set"
then
#  set
  if test -n $(cat $2 | grep $3=)
  then
    sed "s/$(cat $2 | grep $3=)/$3=$4/" <$2 >$2_tmp && mv $2_tmp $2
    exit 0
  fi;

  echo $3=$4 >> $2
  exit 0
fi