#!/bin/sh # Test that concatenated gz files are unpacking correctly. # It also tests that unpacking in general is working right. # Since zip code has many corner cases, run it for a few hours # to get a decent coverage (200000 tests or more). gzip="gzip" gunzip="../busybox gunzip" # Or the other way around: #gzip="../busybox gzip" #gunzip="gunzip" c=0 i=$PID while true; do c=$((c+1)) # RANDOM is not very random on some shells. Spice it up. # 100003 is prime len1=$(( (((RANDOM*RANDOM)^i) & 0x7ffffff) % 100003 )) i=$((i * 1664525 + 1013904223)) len2=$(( (((RANDOM*RANDOM)^i) & 0x7ffffff) % 100003 )) # Just using urandom will make gzip use method 0 (store) - # not good for test coverage! cat /dev/urandom | while true; do read junk; echo "junk $c $i $junk"; done \ | dd bs=$len1 count=1 >z1 2>/dev/null cat /dev/urandom | while true; do read junk; echo "junk $c $i $junk"; done \ | dd bs=$len2 count=1 >z2 2>/dev/null $gzip <z1 >zz.gz $gzip <z2 >>zz.gz $gunzip -c zz.gz >z9 || { echo "Exitcode $?" exit } sum=`cat z1 z2 | md5sum` sum9=`md5sum <z9` test "$sum" == "$sum9" || { echo "md5sums don't match" exit } echo "Test $c ok: len1=$len1 len2=$len2 sum=$sum" sum=`cat z1 z2 z1 z2 | md5sum` rm z1.gz z2.gz 2>/dev/null $gzip z1 $gzip z2 cat z1.gz z2.gz z1.gz z2.gz >zz.gz $gunzip -c zz.gz >z9 || { echo "Exitcode $? (2)" exit } sum9=`md5sum <z9` test "$sum" == "$sum9" || { echo "md5sums don't match (1)" exit } echo "Test $c ok: len1=$len1 len2=$len2 sum=$sum (2)" done