backwards.py

#!/bin/python

# Documentation:
# Takes a byte-stream on input and
# produces the hex values that would
# produce those bytes if ran through the
# sendstring program.
#
# example usage:
#    cat smoke.bytes | python byte2str.python
#    cat smoke.bytes | python byte2str.python > smoke.txt
#
# This program is usefull if you have lost your original
# text file, if you generate the bytes in an external
# program, or if you just pipe stdin to a file like
# a real programmer.

import sys

def conv(input):
    for c in input:
        h = hex(ord(c))[2:]
        if (len(h) < 2):
            h = "0" + h
        yield h

arr = [x for x in conv(sys.stdin.read())]
print " ".join(arr[:-1])

stackify.py

#!/bin/python

# Documentation:
# Takes a "stack" as produced by the gdb command
# and makes a more readable one.
# 'x/10xg $sp' prints the last 10 8-byte integers
# on the stack, but it looks fairly ugly as you can
# see.

# (gdb) x/10xg $sp
# 0x7fffffffb630: 0x1abzzzzzzzzzz848      0x230zzzzzzzzzzzzd
# 0x7fffffffb640: 0xaaaazzzzzzzzzz60      0xaaaaaaaaaaaaaaaa
# 0x7fffffffb650: 0xaaaaaaaaaaaaaaaa      0xaaaaaaaaaaaaaaaa
# 0x7fffffffb660: 0xaaaaaaaaaaaaaaaa      0x0zzzzzzzzzzzzz30
# 0x7fffffffb670: 0x000000zzzzzzz050      0x00zzzzzzzzzzzeef

# after being run through stackify.py, it would be
# transformed into the following

# $ python stackify.py
# 0x0000zzzzzzzzzzef  <- this stack looks like the stack
# 0x00zzzzzzzzzzzz50     diagrams that we've been looking
# 0x00007fffffffb630     at in class, unlike the above one
# 0xaaaaaaaaaaaaaaaa     produced by gdb.
# 0xaaaaaaaaaaaaaaaa
# 0xaaaaaaaaaaaaaaaa
# 0xaaaaaaaaaaaaaaaa
# 0xaaaaaaaazzzzzzz0
# 0x2zzzzzzzzzzzzzed
# 0x1zzzzzzzzzzzzz48

# You can enter the gdb stack into stackify by pasting
# the gdb stack into the stdin from stackify (remember to
# hit [enter] and then [ctrl][d] to signal file end), or
# you can save the stack into a file and then pipe
# cat saved_stack.txt | python stackify.py

import sys

def stackify(input):
    lines = input.split("\n")
    individ = []
    for section in lines:
        broken = section.split(" ")
        individ += broken[1:]
    return individ[::-1]


want = filter(lambda x: len(x)> 0, stackify(sys.stdin.read()))

print "\n".join(want)