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 /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 trun-
              cation size.  The size and  maxsize  parameter  may
              end with a ``k'', ``m'', or ``g'', indicating kilo-
              byte  (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  lt;chongo@toad.com  and  Rich
       $alz lt;rsalz@uunet.uu.net for InterNetNews.