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#!/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
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