LXR busybox/archival/bbunzip

   1#!/bin/sh
   2# Test that concatenated gz files are unpacking correctly.
   3# It also tests that unpacking in general is working right.
   4# Since zip code has many corner cases, run it for a few hours
   5# to get a decent coverage (200000 tests or more).
   6
   7gzip="gzip"
   8gunzip="../busybox gunzip"
   9# Or the other way around:
  10#gzip="../busybox gzip"
  11#gunzip="gunzip"
  12
  13c=0
  14i=$PID
  15while true; do
  16    c=$((c+1))
  17
  18    # RANDOM is not very random on some shells. Spice it up.
  19    # 100003 is prime
  20    len1=$(( (((RANDOM*RANDOM)^i) & 0x7ffffff) % 100003 ))
  21    i=$((i * 1664525 + 1013904223))
  22    len2=$(( (((RANDOM*RANDOM)^i) & 0x7ffffff) % 100003 ))
  23
  24    # Just using urandom will make gzip use method 0 (store) -
  25    # not good for test coverage!
  26    cat /dev/urandom | while true; do read junk; echo "junk $c $i $junk"; done \
  27    | dd bs=$len1 count=1 >z1 2>/dev/null
  28    cat /dev/urandom | while true; do read junk; echo "junk $c $i $junk"; done \
  29    | dd bs=$len2 count=1 >z2 2>/dev/null
  30
  31    $gzip <z1 >zz.gz
  32    $gzip <z2 >>zz.gz
  33    $gunzip -c zz.gz >z9 || {
  34        echo "Exitcode $?"
  35        exit
  36    }
  37    sum=`cat z1 z2 | md5sum`
  38    sum9=`md5sum <z9`
  39    test "$sum" == "$sum9" || {
  40        echo "md5sums don't match"
  41        exit
  42    }
  43    echo "Test $c ok: len1=$len1 len2=$len2 sum=$sum"
  44
  45    sum=`cat z1 z2 z1 z2 | md5sum`
  46    rm z1.gz z2.gz 2>/dev/null
  47    $gzip z1
  48    $gzip z2
  49    cat z1.gz z2.gz z1.gz z2.gz >zz.gz
  50    $gunzip -c zz.gz >z9 || {
  51        echo "Exitcode $? (2)"
  52        exit
  53    }
  54    sum9=`md5sum <z9`
  55    test "$sum" == "$sum9" || {
  56        echo "md5sums don't match (1)"
  57        exit
  58    }
  59
  60    echo "Test $c ok: len1=$len1 len2=$len2 sum=$sum (2)"
  61done
  62