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
<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 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.
SEE ALSO¶
inn.conf(5)