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