shrinkfile



SHRINKFILE(1)                                                    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.  Trun-
       cation  is  performed  on  line boundaries, where a line is a series of
       bytes ending with a newline, ‘‘\n’’.  There is no line length  restric-
       tion 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  max-
              size 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)

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