Table of Contents
shrinkfile - shrink a file on a line boundary
shrinkfile [
-n ] [ -m maxsize ] [ -s size ] [ -v ] file...
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.
- -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 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.
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
Written by Landon Curt Noll <chongo@toad.com> and Rich $alz <rsalz@uunet.uu.net>
for InterNetNews.
inn.conf(5)
Table of Contents