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 /var/spool/news/in.coming/tmp 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 assume 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.

                                                                                                   SHRINKFILE(1)