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