trunk/vmware-workstation/unbundle.sh

#!/bin/bash

ORIGFILE="$1"

is_relative() {
    local path="$1"
    shift

    [ "${path:0:1}" != "/" ]
    return
}

set_offsets() {
	# This won't work with non-GNU stat.
	FILE_SIZE=`stat -L --format "%s" "$1"`
	local offset=$(($FILE_SIZE - 4))
	
	MAGIC_OFFSET=$offset
	offset=$(($offset - 4))
	
	CHECKSUM_OFFSET=$offset
	offset=$(($offset - 4))
	
	VERSION_OFFSET=$offset
	offset=$(($offset - 4))
	
	PREPAYLOAD_OFFSET=$offset
	offset=$(($offset - 4))
	
	PREPAYLOAD_SIZE_OFFSET=$offset
	offset=$(($offset - 4))
	
	LAUNCHER_SIZE_OFFSET=$offset
	offset=$(($offset - 4))
	
	PAYLOAD_OFFSET=$offset
	offset=$(($offset - 4))
	
	PAYLOAD_SIZE_OFFSET=$offset
	offset=$(($offset - 4))
}

set_lengths() {
   local file="$1"
   if [ ! -s "$file" ]; then
      echo "$file does not exist"
      exit 1
   fi

   # XXX: put extraction in its own function
   MAGIC_NUMBER=`od -An -t u4 -N 4 -j $MAGIC_OFFSET "$file" | tr -d ' '`

   if [ "$MAGIC_NUMBER" != "907380241" ]; then
      echo "magic number does not match"
      exit 1
   fi

   LAUNCHER_SIZE=`od -An -t u4 -N 4 -j $LAUNCHER_SIZE_OFFSET "$file" | tr -d ' '`
   PAYLOAD_SIZE=`od -An -t u4 -N 4 -j $PAYLOAD_SIZE_OFFSET "$file" | tr -d ' '`
   PREPAYLOAD_SIZE=`od -An -t u4 -N 4 -j $PREPAYLOAD_SIZE_OFFSET "$file" | tr -d ' '`

   SKIP_BYTES=$(($PREPAYLOAD_SIZE + $LAUNCHER_SIZE))

   return 0
}

if is_relative "${ORIGFILE}"; then
	ORIGFILE="`pwd`/${ORIGFILE}"
fi


set_offsets ${ORIGFILE}
set_lengths ${ORIGFILE}

echo "Unbundling" ${ORIGFILE}

PREPAYLOAD="prepayload"
PAYLOAD="payload"

# Unpack the pre-payload file
mkdir ${PREPAYLOAD}
cd ${PREPAYLOAD}
dd if="${ORIGFILE}" ibs=$LAUNCHER_SIZE obs=1024 skip=1 | tar -xzf - 2> /dev/null
cd ..

# Unpack the main file
mkdir ${PAYLOAD}
cd ${PAYLOAD}
dd if="${ORIGFILE}" ibs=$SKIP_BYTES obs=1024 skip=1 | tar -xzf - 2> /dev/null
cd ..

1	niro	852	#!/bin/bash
2
3			ORIGFILE="$1"
4
5			is_relative() {
6			local path="$1"
7			shift
8
9			[ "${path:0:1}" != "/" ]
10			return
11			}
12
13			set_offsets() {
14			# This won't work with non-GNU stat.
15			FILE_SIZE=`stat -L --format "%s" "$1"`
16			local offset=$(($FILE_SIZE - 4))
17
18			MAGIC_OFFSET=$offset
19			offset=$(($offset - 4))
20
21			CHECKSUM_OFFSET=$offset
22			offset=$(($offset - 4))
23
24			VERSION_OFFSET=$offset
25			offset=$(($offset - 4))
26
27			PREPAYLOAD_OFFSET=$offset
28			offset=$(($offset - 4))
29
30			PREPAYLOAD_SIZE_OFFSET=$offset
31			offset=$(($offset - 4))
32
33			LAUNCHER_SIZE_OFFSET=$offset
34			offset=$(($offset - 4))
35
36			PAYLOAD_OFFSET=$offset
37			offset=$(($offset - 4))
38
39			PAYLOAD_SIZE_OFFSET=$offset
40			offset=$(($offset - 4))
41			}
42
43			set_lengths() {
44			local file="$1"
45			if [ ! -s "$file" ]; then
46			echo "$file does not exist"
47			exit 1
48			fi
49
50			# XXX: put extraction in its own function
51			MAGIC_NUMBER=`od -An -t u4 -N 4 -j $MAGIC_OFFSET "$file" \| tr -d ' '`
52
53			if [ "$MAGIC_NUMBER" != "907380241" ]; then
54			echo "magic number does not match"
55			exit 1
56			fi
57
58			LAUNCHER_SIZE=`od -An -t u4 -N 4 -j $LAUNCHER_SIZE_OFFSET "$file" \| tr -d ' '`
59			PAYLOAD_SIZE=`od -An -t u4 -N 4 -j $PAYLOAD_SIZE_OFFSET "$file" \| tr -d ' '`
60			PREPAYLOAD_SIZE=`od -An -t u4 -N 4 -j $PREPAYLOAD_SIZE_OFFSET "$file" \| tr -d ' '`
61
62			SKIP_BYTES=$(($PREPAYLOAD_SIZE + $LAUNCHER_SIZE))
63
64			return 0
65			}
66
67			if is_relative "${ORIGFILE}"; then
68			ORIGFILE="`pwd`/${ORIGFILE}"
69			fi
70
71
72			set_offsets ${ORIGFILE}
73			set_lengths ${ORIGFILE}
74
75			echo "Unbundling" ${ORIGFILE}
76
77			PREPAYLOAD="prepayload"
78			PAYLOAD="payload"
79
80			# Unpack the pre-payload file
81			mkdir ${PREPAYLOAD}
82			cd ${PREPAYLOAD}
83			dd if="${ORIGFILE}" ibs=$LAUNCHER_SIZE obs=1024 skip=1 \| tar -xzf - 2> /dev/null
84			cd ..
85
86			# Unpack the main file
87			mkdir ${PAYLOAD}
88			cd ${PAYLOAD}
89			dd if="${ORIGFILE}" ibs=$SKIP_BYTES obs=1024 skip=1 \| tar -xzf - 2> /dev/null
90			cd ..
91