05-14-2008
Regular Expression question
Folks;
I have 3 questions & any help with them would be really appreciated:
If i have a list of directories, for example:
/fs/pas/2007/4/6/2634210/admdat/examin
/fs/pas/2007/4/6/2634210/admdat2/stat
/fs/pas/2007/4/6/2634210/admdat3/data
/fs/pas/2007/4/6/2634210/im_2/0b.dcm
Now; my questions are:
1. How to use RE to extract the last file such as "examin and stat,..."?
2. How to use RE to extract the parent directory for the last file. such as "amdat, amdat2, im_2,..."?
3. How to use RE to extract the date in the middle "2007/4/6"?
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LEARN ABOUT CENTOS
tracker-extract
tracker-extract(1) User Commands tracker-extract(1)
NAME
tracker-extract - Extract metadata from a file.
SYNOPSYS
tracker-extract [OPTION...] FILE...
DESCRIPTION
tracker-extract reads the file and mimetype provided in stdin and extract the metadata from this file; then it displays the metadata on the
standard output.
NOTE: If a FILE is not provided then tracker-extract will run for 30 seconds waiting for DBus calls before quitting.
OPTIONS
-?, --help
Show summary of options.
-v, --verbosity=N
Set verbosity to N. This overrides the config value. Values include 0=errors, 1=minimal, 2=detailed and 3=debug.
-f, --file=FILE
The FILE to extract metadata from. The FILE argument can be either a local path or a URI. It also does not have to be an absolute
path.
-m, --mime=MIME
The MIME type to use for the file. If one is not provided, it will be guessed automatically.
-d, --disable-shutdown
Disable shutting down after 30 seconds of inactivity.
-i, --force-internal-extractors
Use this option to force internal extractors over 3rd parties like libstreamanalyzer.
-m, --force-module=MODULE
Force a particular module to be used. This is here as a convenience for developers wanting to test their MODULE file. Only the MOD-
ULE name has to be specified, not the full path. Typically, a MODULE is installed to /usr/lib/tracker-0.7/extract-modules/. This
option can be used with or without the .so part of the name too, for example, you can use --force-module=foo
Modules are shared objects which are dynamically loaded at run time. These files must have the .so suffix to be loaded and must con-
tain the correct symbols to be authenticated by tracker-extract. For more information see the libtracker-extract reference documen-
tation.
-V, --version
Show binary version.
EXAMPLES
Using command line to extract metadata from a file:
$ tracker-extract -v 3 -f /path/to/some/file.mp3
Using a specific module to extract metadata from a file:
$ tracker-extract -v 3 -f /path/to/some/file.mp3 -m mymodule
ENVIRONMENT
TRACKER_EXTRACTORS_DIR
This is the directory which tracker uses to load the shared libraries from (used for extracting metadata for specific file types).
These are needed on each invocation of tracker-store. If unset it will default to the correct place. This is used mainly for testing
purposes. The default location is /usr/lib/tracker-0.10/extract-modules/.
TRACKER_EXTRACTOR_RULES_DIR
This is the directory which tracker uses to load the rules files from. The rules files describe extractor modules and their sup-
ported MIME types. The default location is /usr/share/tracker/extract-rules/.
TRACKER_USE_CONFIG_FILES
Don't use GSettings, instead use a config file similar to how settings were saved in 0.10.x. That is, a file which is much like an
.ini file. These are saved to $HOME/.config/tracker/
SEE ALSO
tracker-store(1), tracker-sparql(1), tracker-stats(1), tracker-info(1).
/usr/lib/tracker-0.10/extract-modules/
/usr/share/tracker/extract-rules/
GNU
July 2007 tracker-extract(1)