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Annotation of researchv10dc/man/adm/man1/pack.1, revision 1.1

1.1     ! root        1: .TH PACK 1
        !             2: .CT 1 files
        !             3: .SH NAME
        !             4: pack, unpack, pcat, compress, uncompress, zcat \(mi compress and expand files
        !             5: .SH SYNOPSIS
        !             6: .B pack
        !             7: [
        !             8: .B -
        !             9: ]
        !            10: .I file ...
        !            11: .PP
        !            12: .B unpack
        !            13: .I file ...
        !            14: .PP
        !            15: .B pcat
        !            16: [
        !            17: .I file ...
        !            18: ]
        !            19: .PP
        !            20: .B compress
        !            21: [
        !            22: .I option ...
        !            23: ]
        !            24: [
        !            25: .I file ...
        !            26: ]
        !            27: .PP
        !            28: .B uncompress
        !            29: [
        !            30: .I option ...
        !            31: ]
        !            32: [
        !            33: .I file ...
        !            34: ]
        !            35: .PP
        !            36: .B zcat
        !            37: [
        !            38: .B -V
        !            39: ]
        !            40: [
        !            41: .I file ...
        !            42: ]
        !            43: .SH DESCRIPTION
        !            44: .I Pack
        !            45: attempts to compress the
        !            46: .I files
        !            47: and places the results in
        !            48: corresponding files named
        !            49: .IB file .z
        !            50: with the same access modes, dates, and owner as the originals.
        !            51: Successfully packed files are removed.
        !            52: .PP
        !            53: .I Unpack
        !            54: reverses the process.
        !            55: .PP
        !            56: .I Pcat
        !            57: unpacks files to the standard output.
        !            58: .PP
        !            59: The
        !            60: .B .z
        !            61: suffix may be omitted from the name of the
        !            62: input file for
        !            63: .I unpack
        !            64: or
        !            65: .I pcat.
        !            66: .PP
        !            67: .I Pack
        !            68: encodes individual characters in a Huffman code.
        !            69: Option
        !            70: .B -
        !            71: causes statistics of the encoding to be printed.
        !            72: The option toggles on and off at each appearance among the
        !            73: list of
        !            74: .I files.
        !            75: .PP
        !            76: .I Compress, uncompress,
        !            77: and
        !            78: .I zcat
        !            79: work like
        !            80: .I pack, unpack,
        !            81: and
        !            82: .I pcat,
        !            83: putting each compressed
        !            84: .I file
        !            85: into
        !            86: .IB file .Z .
        !            87: The options are
        !            88: .TP
        !            89: .B -f
        !            90: (force)
        !            91: Compress even when it doesn't save space.
        !            92: .TP
        !            93: .B -c
        !            94: Write to the standard output; change no files.
        !            95: .I Zcat
        !            96: is identical to
        !            97: .I uncompress
        !            98: .B -c.
        !            99: .TP
        !           100: .BI -b bits
        !           101: .I Compress
        !           102: uses a modified Lempel-Ziv encoding.
        !           103: Common substrings in the file are replaced by
        !           104: variable-length codes up to size
        !           105: .I bits
        !           106: (default 16).
        !           107: Smaller limits devour less address space.
        !           108: .TP
        !           109: .B -v
        !           110: Print percent reduction for each file.
        !           111: .TP
        !           112: .B -V
        !           113: Print program version number.
        !           114: .PP
        !           115: .I Compress-uncompress
        !           116: pack better and are faster overall;
        !           117: .I pack-unpack
        !           118: work on smaller machines and are much more widely available.
        !           119: .SH "SEE ALSO"
        !           120: T. A. Welch,
        !           121: `A Technique for High Performance Data Compression,'
        !           122: .I "IEEE Computer,"
        !           123: 17 (1984) 8-19.
        !           124: .SH DIAGNOSTICS
        !           125: The exit code of
        !           126: .I pack, unpack,
        !           127: or
        !           128: .I pcat
        !           129: is the number of files it failed to process.
        !           130: .PP
        !           131: The exit code of
        !           132: .I compress, uncompress,
        !           133: or
        !           134: .I zcat
        !           135: is 0 normally, 1 for error, 2 for ineffective compression
        !           136: (i.e. expansion).

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