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#! /bin/sh
# Copyright (C) 2011 Mikolaj Izdebski
set -e -C
IFS=' '' ''
'
test -r "$1"
# Try limiting virtual memory usage to 1 GiB. This can save users of systems
# with memory overcommit enabled and no ulimit set.
ulimit -v $(expr 1024 \* 1024) || :
# Unset variables that may affect behavior of lbzip2.
# (Some shells don't like unsetting variables that are not set.)
LBZIP2= unset LBZIP2
BZIP2= unset BZIP2
BZIP= unset BZIP
# Create temp files in current working directory.
bn=$(echo "$1" | sed 's@^\(.*/\)*\([^/.][^/.]*\)\.[^/]*$@\2@')
r1=tmp.$bn.1.$$
r2=tmp.$bn.2.$$
# Run decompressors, temporarly disabling error checking.
set +e
./timeout ./minbzcat <"$1" >$r1 2>/dev/null; rc1=$?
./timeout ../src/lbzip2 -dcqn4 <"$1" >$r2 2>/dev/null; rc2=$?
set -e
# Make sure none of decompressors crashed (exit code >= 128)
test $rc1 -lt 128 -a $rc2 -lt 128
# bad - bad bz2 file according to lbzip2
# xbad - bad bz2 file according to minbzcat (expected bad)
test $rc1 = 0 && xbad= || xbad=1
test $rc2 = 0 && bad= || bad=1
# pdksh needs whitespace between the two left parentheses.
# dash builtin test needs this redundand quoting before $bad and $xbad,
# see: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=598238
( (test $xbad && test $bad) || (test ! ''$xbad && test ! ''$bad &&
cmp $r1 $r2 2>/dev/null)) && rc= || rc=1
rm -f $r1 $r2
exit $rc
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