shrinkfile man page on 4.4BSD

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SHRINKFILE(1)							 SHRINKFILE(1)

NAME
       shrinkfile - shrink a file on a line boundary

SYNOPSIS
       shrinkfile [ -s size ] [ -v ] file...

DESCRIPTION
       The  shrinkfile	program	 shrinks files to a given size, preserving the
       data at the end of the file.  Truncation is performed  on  line	bound‐
       aries,  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.

       By  default, files are truncated to zero bytes.	The ``-s'' flag may be
       used to change the maximum size.	 Because the program truncates only on
       line  boundaries,  the final size may be may be smaller then the speci‐
       fied maximum.  The 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.

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

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

								 SHRINKFILE(1)
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