u-tools/apps/busybox/archival/bbunzip_test.sh

   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
   7 gzip="gzip"
   8 gunzip="../busybox gunzip"
   9 # Or the other way around:
  10 #gzip="../busybox gzip"
  11 #gunzip="gunzip"
  12
  13 c=0
  14 i=$PID
  15 while true; do
  16     c=$((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)"
  61 done