DragonFly On-Line Manual Pages

SHRINKFILE(1)          DragonFly General Commands Manual         SHRINKFILE(1)

NAME
       shrinkfile - shrink a file on a line boundary

SYNOPSIS
       shrinkfile [ -n ] [ -m maxsize ] [ -s size ] [ -v ] file...

DESCRIPTION
       The shrinkfile program shrinks files to a given size if the size is
       larger than maxsize, preserving the data at the end of the file.
       Truncation is performed on line boundaries, where a line is a series of
       bytes ending with a newline, ``\n''.  There is no line length
       restriction and files may contain any binary data.

       Temporary files are created in the <pathtmp in inn.conf> directory.
       The ``TMPDIR'' environment variable may be used to specify a different
       directory.

       A newline will be added to any non-empty file that does not end with a
       newline.  The maximum file size will not be exceeded by this addition.

OPTIONS
       -s     By default, size is assumed to be zero and files are truncated
              to zero bytes.  By default, maxsize is the same as size.  If
              maxsize is less than size, maxsize is reset to size.  The ``-s''
              flag may be used to change the truncation size.  Because the
              program truncates only on line boundaries, the final size may be
              smaller then the specified truncation size.  The size and
              maxsize parameter may end with a ``k'', ``m'', or ``g'',
              indicating kilobyte (1024), megabyte (1048576) or gigabyte
              (1073741824) lengths.  Uppercase letters are also allowed.  The
              maximum file size is 2147483647 bytes.

       -v     If the ``-v'' flag is used, then shrinkfile will print a status
              line if a file was shrunk.

       -n     If the ``-n'' flag is used, then shrinkfile will exit 0 if any
              file is larger than maxsize and exit 1 otherwise.  No files will
              be altered.

EXAMPLES
       Example usage:

              shrinkfile -s 4m curds
              shrinkfile -s 1g -v whey
              shrinkfile -s 500k -m 4m -v curds whey
              if shrinkfile -n -s 100m whey; then echo whey is way too big; fi

HISTORY
       Written by Landon Curt Noll <chongo@toad.com> and Rich $alz
       <rsalz@uunet.uu.net> for InterNetNews.

SEE ALSO
       inn.conf(5)

                                                                 SHRINKFILE(1)