43 lines
935 B
Diff
43 lines
935 B
Diff
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--- zgrep.in
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+++ zgrep.in
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@@ -102,13 +102,36 @@
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fi
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if test $# -eq 0; then
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- gzip -cdfq | $grep $opt "$pat"
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- exit $?
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+ if type -p dd > /dev/null 2>&1 &&
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+ type -p mimencode > /dev/null 2>&1 &&
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+ type -p file > /dev/null 2>&1
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+ then
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+ uncompress=gzip
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+ x=`dd bs=20 count=1 2> /dev/null | mimencode -b`
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+ case `echo -n $x | mimencode -u -b | file -b -` in
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+ bzip2*)
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+ uncompress=bzip2
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+ ;;
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+ esac
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+ (echo -n $x | mimencode -u -b; cat -) | $uncompress -cdfq | $grep $opt "$pat"
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+ exit $?
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+ else
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+ gzip -cdfq | $grep $opt "$pat"
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+ exit $?
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+ fi
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fi
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res=0
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for i do
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- gzip -cdfq -- "$i" |
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+ case $i in
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+ *.bz2)
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+ uncompress=bzip2
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+ ;;
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+ *)
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+ uncompress=gzip
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+ ;;
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+ esac
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+ $uncompress -cdfq "$i" |
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if test $files_with_matches -eq 1; then
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$grep $opt "$pat" > /dev/null && printf '%s\n' "$i"
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elif test $files_without_matches -eq 1; then
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