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          --- old/usr/src/man/man1/compress.1.man.txt
          +++ new/usr/src/man/man1/compress.1.man.txt
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  18   18  
  19   19         zcat [file]...
  20   20  
  21   21  
  22   22  DESCRIPTION
  23   23     compress
  24   24         The compress utility attempts to reduce the size of the named files by
  25   25         using adaptive Lempel-Ziv coding. Except when the output is to the
  26   26         standard output, each file is replaced by one with the extension .Z,
  27   27         while keeping the same ownership modes, change times and modification
  28      -       times, ACLs, and extended attributes. The compress utility also attempt
  29      -       to set the owner and group of file.z to the owner and group of file,
  30      -       but does not fail if this cannot be done. If appending the .Z to the
  31      -       file pathname would make the pathname exceed 1023 bytes, the command
  32      -       fails. If no files are specified, the standard input is compressed to
  33      -       the standard output.
       28 +       times, ACLs, and extended attributes. The compress utility also
       29 +       attempts to set the owner and group of file.Z to the owner and group of
       30 +       file, but does not fail if this cannot be done. If appending the .Z to
       31 +       the file pathname would make the pathname exceed 1023 bytes, the
       32 +       command fails. If no files are specified, the standard input is
       33 +       compressed to the standard output.
  34   34  
  35   35  
  36   36         The amount of compression obtained depends on the size of the input,
  37   37         the number of bits per code, and the distribution of common substrings.
  38   38         Typically, text such as source code or English is reduced by 50-60%.
  39   39         Compression is generally much better than that achieved by Huffman
  40   40         coding (as used in pack(1)) and it takes less time to compute. The bits
  41   41         parameter specified during compression is encoded within the compressed
  42   42         file, along with a magic number to ensure that neither decompression of
  43   43         random data nor recompression of compressed data is subsequently
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  49   49         specified, the standard input is uncompressed to the standard output.
  50   50  
  51   51  
  52   52         This utility supports the uncompressing of any files produced by
  53   53         compress. For files produced by compress on other systems, uncompress
  54   54         supports 9- to 16-bit compression (see -b).
  55   55  
  56   56     zcat
  57   57         The zcat utility writes to standard output the uncompressed form of
  58   58         files that have been compressed using compress. It is the equivalent of
  59      -       uncompress-c. Input files are not affected.
       59 +       uncompress -c. Input files are not affected.
  60   60  
  61   61  OPTIONS
  62   62         The following options are supported:
  63   63  
  64   64         -b bits
  65   65                    Sets the upper limit (in bits) for common substring codes.
  66   66                    bits must be between 9 and 16 (16 is the default). Lowering
  67   67                    the number of bits result in larger, less compressed files.
  68   68  
  69   69
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 113  113         file
 114  114                 A path name of a file to be compressed by compress,
 115  115                 uncompressed by uncompress, or whose uncompressed form is
 116  116                 written to standard out by zcat. If file is -, or if no file is
 117  117                 specified, the standard input is used.
 118  118  
 119  119  
 120  120  USAGE
 121  121         See largefile(5) for the description of the behavior of compress,
 122  122         uncompress, and zcat when encountering files greater than or equal to 2
 123      -       Gbyte ( 2^31 bytes).
      123 +       Gbyte (2^31 bytes).
 124  124  
 125  125  ENVIRONMENT VARIABLES
 126  126         See environ(5) for descriptions of the following environment variables
 127  127         that affect the execution of compress, uncompress, and zcat: LANG,
 128  128         LC_ALL, LC_COLLATE, LC_CTYPE, LC_MESSAGES, and NLSPATH.
 129  129  
 130  130  
 131  131         Affirmative responses are processed using the extended regular
 132  132         expression defined for the yesexpr keyword in the LC_MESSAGES category
 133  133         of the user's locale. The locale specified in the LC_COLLATE category
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 172  172         |Interface Stability | Committed         |
 173  173         +--------------------+-------------------+
 174  174         |Standard            | See standards(5). |
 175  175         +--------------------+-------------------+
 176  176  
 177  177  SEE ALSO
 178  178         ln(1), pack(1), fgetattr(3C), fsetattr(3C), attributes(5), environ(5),
 179  179         largefile(5), locale(5), standards(5)
 180  180  
 181  181  DIAGNOSTICS
 182      -       Usage: compress [-fv/] [-b bits] [file... ]
 183      -       compress c [-fv] [-b bits] [file... ]
      182 +       Usage: compress [-fv/] [-b maxbits] [file... ]
      183 +       compress c [-fv] [-b maxbits] [file]
 184  184  
 185  185             Invalid options were specified on the command line.
 186  186  
 187  187  
 188  188         Usage: uncompress [-fv] [-c | -/] [file]...
 189  189  
 190  190             Invalid options were specified on the command line.
 191  191  
 192  192  
 193  193         Missing maxbits
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 206  206             than the compress code on this machine. Recompress the file with
 207  207             smaller bits.
 208  208  
 209  209  
 210  210         file: already has .Z suffix -- no change
 211  211  
 212  212             The file is assumed to be already compressed. Rename the file and
 213  213             try again.
 214  214  
 215  215  
 216      -       file: already exists; do you wish to overwrite (y or n)?
      216 +       file already exists; do you wish to overwrite (yes or no)?
 217  217  
 218  218             Respond y if you want the output file to be replaced; n if not.
 219  219  
 220  220  
 221  221         uncompress: corrupt input
 222  222  
 223  223             A SIGSEGV violation was detected, which usually means that the
 224  224             input file is corrupted.
 225  225  
 226  226
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 261  261  NOTES
 262  262         Although compressed files are compatible between machines with large
 263  263         memory, -b 12 should be used for file transfer to architectures with a
 264  264         small process data space (64KB or less).
 265  265  
 266  266  
 267  267         compress should be more flexible about the existence of the .Z suffix.
 268  268  
 269  269  
 270  270  
 271      -                                March 13, 2008                     COMPRESS(1)
      271 +                               February 5, 2020                    COMPRESS(1)
    
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