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Annotation of researchv10no/cmd/gre/gre.prop, revision 1.1

1.1     ! root        1:        Al Aho and I are designing a replacement for grep, egrep and fgrep.
        !             2: The question is what flags should it support and what kind of patterns
        !             3: should it handle? (Assume the existence of flags to make it compatible
        !             4: with grep, egrep and fgrep.)
        !             5:        The proposed flags are the V9 flags:
        !             6: -f file        pattern is (`cat file`)
        !             7: -v     print nonmatching
        !             8: -i     ignore aphabetic case
        !             9: -n     print line number
        !            10: -x     the pattern used is ^pattern$
        !            11: -c     print count only
        !            12: -l     print filenames only
        !            13: -b     print byte offset of line begin
        !            14: -h     do not print filenames in front of matching lines
        !            15: -H     always print filenames in front of matching lines
        !            16: -w     pattern is <whitespace>pattern<whitespace>
        !            17: -s     no output; just status
        !            18: -e expr        use expr as the pattern
        !            19: 
        !            20: The patterns are as for egrep, supplemented by back-referencing
        !            21: as in \{pattern\}\1.
        !            22: 
        !            23: please send your comments about flags or patterns to research!andrew

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