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direntries - fast manage entries in a directory
direntries -r [directory]
direntries -m [ -d depth ] [directory[/./subdirectory]]
direntries -s [ -p ] [ -e filename-extension ] [ -P filename-prefix ] [directory]
direntries -D [ -e filename-extension ] [ -P filename-prefix ] [ -t min-age-in-days
The primary purpose of this tool is native and fast working
with directories containing many files. Some filesystems like ext2, ext3
and more have dramatically performance breakdowns on directories with hundreds
of thousands files in it. Common tools like "ls" or shell wildcards with
sorting make listings, deletions and more too slow too manage. This tool
steps natively through the directory entries list, does not sort and makes
use of leaf optimization if possible.
In the first mode ( normal mode ) direntries just counts all entries within
In the second mode ( recursive mode ) it does the same with recursively
stepping into subdirectories. In recursive mode direntries makes use of
leaf optimization to speed up counting.
The third mode is called maximum mode and it is used to search recursively
for the directory with the most entries. With the parameter depth a limit
of the recursion level can be set (0 means no limit). If you specify one
dot in the path of the directory/subdirectory it will be interpreted as
a wildcard like "*" in the shell but even faster, i.e. /home/./html is the
same as /home/*/html in the shell.
In show mode you get a small statistic about some frequently on webservers
found extensions like i.e. .gif or .jpg. You can also specify a extension or
a prefix for the filenames. The specified extension has priority over a
specified prefix. The p-option enables the printing of all matching filenames.
The delete mode is very useable if you have have directories with hundreds
of thousands files (i.e. .gif) within a directory. In the delete mode direntries
removes entries in a dir faster than any combination of standard shell
commands. You can also specify a extension or a prefix for the filenames.
An optional min-age-in-days argument can be used for deletion of files older
than min-age-in-days days. The specified extension has priority over a specified
prefix. After deleting the amount of deleted files is printed.
If no directory is given then the working directory "." is used.
/tmp # fast replaces "find /tmp 2>/dev/null|wc -l"
direntries -m -d 2 /home/www/./html/typo3temp
direntries -s -e .html ~webXXXX/html
direntries -D -e .gif ~webXXXX/html/typo3temp/pics
Common command sequence:
- $ direntries -m -d 2 /home/www/./html/typo3temp
$ direntries -s /home/www/webXXX/html/typo3temp/pics
$ direntries -D -e .gif /home/www/webXXX/html/typo3temp/pics
The maximum internal absolute pathname length is 16384 chars.
In normal mode also the directory entries "." and ".." will be counted.
Errors like "permission denied" are silently ignored.
Due to "leaf optimization" in recursive mode it can produce wrong results
on non-unix-like filesystems.
Frank Bergmann, http://www.tuxad.com
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