- CONFIGURATION FILE
- COMPRESSED FILES
- SEE ALSO
- COPYRIGHT AND LICENSE
dategrep - print lines matching a date range
dategrep --start "12:00" --end "12:15" --format "%b %d %H:%M:%S" syslog dategrep --end "12:15" --format "%b %d %H:%M:%S" syslog dategrep --last-minutes 5 --format "%b %d %H:%M:%S" syslog dategrep --last-minutes 5 --format rsyslog syslog cat syslog | dategrep --end "12:15"
dategrep searches the named input files for lines matching a date range and prints them to stdout.
If dategrep works on a seekable file, it can do a binary search to find the first and last line to print pretty efficiently. dategrep can also read from stdin and compressed files, but it has to parse every single line until the end of the range for those.
- --start|--from DATESPEC
Print all lines from DATESPEC inclusively. Defaults to Jan 1, 1970 00:00:00 GMT. See VALID-DATE-FORMATS for a list of possible formats for DATESPEC.
- --end|--to DATESPEC
Print all lines until DATESPEC exclusively. Default to the current time. See VALID-DATE-FORMATS for a list of possible formats for DATESPEC.
- --last-minutes MINUTES
Print all lines from MINUTES minutes ago until the beginning of the current minute. So if we have 19:25:43 and MINUTES is five, dategrep will print all lines from 19:20:00 to 19:24:59.
- --format FORMAT
Defines a strftime-based FORMAT that is used to parse the input lines for a date. The first date found on a line is used. The list of possible escape sequences can be found under PRINTF DIRECTIVES.
This is a required parameter. Alternatively you can supply the format via the environment variable DATEGREP_DEFAULT_FORMAT.
Additionally, dategrep supports named formats:
rsyslog "%b %d %H:%M:%S"
apache "%d/%b/%Y:%T %z"
Print all lines between the start and end line even if they are not timestamped.
- --blocksize SIZE
SIZE of the intervals used in the binary search. Defaults to the native blocksize of the file's filesystem or 8129.
Print lines sorted by timestamp even if the timestamps in the input files are overlapping.
Sort files in the order of the first line with a timestamp. For example: If you have a common logrotate configuration, you probably have files like syslog, syslog.1, syslog.2 etc. For dategrep to work we need those files in reverse order: syslog.2, syslog.1, syslog. This options handles that for you.
- --configfile FILE
Reads configuration from FILE instead of ~/.dategreprc.
Shows a short help message
Shows the complete man page in your pager.
On startup dategrep reads a configuration file from $HOME/.dategreprc or the file specified by --configfile.
The file consists of sections and variables. A section begins with the name of the section in square brackets and continues until the next section begins. Section names are not case sensitive. Empty lines and lines with comments are skipped. Comments are started with a hash character. dategrep recognizes only one sections: Under formats you can list additional named formats.
[formats] time = %H:%M:%S
Default for the --format parameter. The syntax is described there.
dategrep has only minimal support for compressed files. If any file in ARGV has an extension like .z,.gz,.bz2,.bz, dategrep will call zcat or bzcat respectively and read from it like from stdin.
It is possible to install this script via perl normal install routines.
perl Build.PL ./Build ./Build install
Or you can use one of the two prebuild versions, which already include all or same of dategreps dependencies. Which to choose mainly depends on how hard it is for you to install Date::Manip. The small version is just 22.3KB big and includes all libraries except Date::Manip. The big one packs everything in a nice, neat package for you, but will cost you almost 10MB of disk space.
So, to install the big version you could just type:
wget https://mdom.github.io/dategrep/dategrep-standalone-big.pl cp dategrep-standalone-big.pl ~/bin/dategrep chmod +x ~/bin/dategrep
And for the small one (with the apt-get for Debian):
wget https://mdom.github.io/dategrep/dategrep-standalone-small.pl cp dategrep-standalone-small.pl ~/bin/dategrep chmod +x ~/bin/dategrep apt-get install libdate-manip-perl
dategrep expects the files to be sorted. If the timestamps are not ascending, dategrep might be exiting before the last line in its date range is printed.
Compressed files are just piped into dategrep via bzcat or zcat.
COPYRIGHT AND LICENSE
Copyright 2014 Mario Domgoergen
This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>.