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 specified 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.