view scripts/bloatcheck @ 1087:b73a61542297 draft

I've finally gotten 'cpio' into a shape where it could be useable. This version can archive and extract directories, sockets, FIFOs, devices, symlinks, and regular files. Supported options are -iot, -H FMT (which is a dummy right now). It only writes newc, and could read newc or newcrc. This does NOT implement -d, which essentially is equivalent to mkdir -p $(dirname $FILE) for every file that needs it. Hard links are not supported, though it would be easy to add them given a hash table or something like that. I also have not implemented the "<n> blocks" output on stderr. If desired, I can add it pretty simply. There is one assumption this makes: that the mode of a file, as mode_t, is bitwise equivalent to the mode as defined for the cpio format. This is true of Linux, but is not mandated by POSIX. If it is compiled for a system where that is false, the archives will not be portable.
author Isaac Dunham <ibid.ag@gmail.com>
date Mon, 14 Oct 2013 11:15:22 -0500
parents f3169b2492f1
children ca297cc8a204
line wrap: on
line source

#!/bin/bash

if [ $# -ne 2 ]
then
  echo "usage: bloatcheck old new"
  exit 1
fi

addline()
{
  NEXT="$(printf "%s% $((50-${#LASTNAME}))d% 10d %10d" "$LASTNAME" "$OLD" "$NEW" "$DELTA")"
  [ -z "$STUFF" ] &&
    STUFF="$NEXT" ||
    STUFF="$(printf "%s\n%s" "$STUFF" "$NEXT")"
}

diff <(nm --size-sort "$1" | sort -k3,3) \
     <(nm --size-sort "$2" | sort -k3,3) | grep '^[<>]' | sort -k4,4 | \
(
LASTNAME=
DELTA=0
TOTAL=0
OLD=0
NEW=0
STUFF=

printf "name% 46s% 10s% 11s\n" old new delta
echo "-----------------------------------------------------------------------"
while read a b c d
do
  THISNAME=$(echo " $d" | sed 's/[.][0-9]*$//')

  if [ "$LASTNAME" != "$THISNAME" ]
  then
    TOTAL=$(($TOTAL+$DELTA))
    [ $DELTA -ne 0 ] && addline
    LASTNAME="$THISNAME"
    DELTA=0
    OLD=0
    NEW=0
  fi

  SIZE=$(printf "%d" "0x$b")
  if [ "$a" == "<" ]
  then
    OLD=$(($OLD+$SIZE))
    SIZE=$((-1*$SIZE))
  else
    NEW=$(($NEW+$SIZE))
  fi
  DELTA=$(($DELTA+$SIZE))
done

TOTAL=$(($TOTAL+$DELTA))
[ $DELTA -ne 0 ] && addline

echo "$STUFF" | sort -k4,4nr
echo "-----------------------------------------------------------------------"
printf "% 71d total\n" "$TOTAL"
)