I know basic scripting only. Honestly, I am looking at each line right now to understand what it means. Please, if it's possible, can you remark on regex used here.
Also, I checked this script. There are some points I observed during testing:
a. When I execute the script with parameter of 'log tcp://1.2.3.4:80', it throws syntax error.
b. There's no check on IP octet / values; i.e. if we give an i/p of 1.2.3.4.5.6.7.8.9.0, then it will be printed as is.
c. When there are more than 2 ports, the second line puts p2, p3 n so on together, instead of on separate lines.
d. There are 100s of entries in a log file, so instead of feeding an IPort one by one, I want to automate it.
e. How can I add more conditional checks in the script. For example, if I see a record -> log tcp://1.2.3.4:3389 -> then I'd want to put it as -> RDP from home system 1.2.3.4 port 3389.
f. is there a way without regex :-P
Update:
I read the regex and just wanted to add what I understood from the script components above. Running the script for 2 ports -> log tcp://1.2.3.4:100-110:
Code:
S=${1:6} <-- initializing S as an array / what is 1:6?
IP="Logged this from host ${S%:*}" <-- implies take any value before :
P=${S##*:} <-- implies take any value after :
if [ "$P" = "*" ] <-- check if value of P is eq to *
then # case B
echo "$IP"
elif I=$(expr index $P '-') <-- locates the char '-' in P and returns index value (?) to I (why?) / how is I = 3 here?
then # case D
echo "$IP range ${P:0:$((I-1))} ${P:$I}" <-- $(P:0:2) is 100 (how?) / $(P:3) is port 110
elif I=$(expr index $P ',') <-- checks if there is a (,) in P
then # case C
echo -e "$IP port ${P:0:$((I-1))}\n$IP port ${P:$I}" <-- same check as above
else # case A
echo "$IP port $P"
fi
Best Regards.
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LEARN ABOUT DEBIAN
watchgnupg
WATCHGNUPG(1) GNU Privacy Guard WATCHGNUPG(1)NAME
watchgnupg - Read and print logs from a socket
SYNOPSIS
watchgnupg [--force] [--verbose] socketname
DESCRIPTION
Most of the main utilities are able to write their log files to a Unix Domain socket if configured that way. watchgnupg is a simple lis-
tener for such a socket. It ameliorates the output with a time stamp and makes sure that long lines are not interspersed with log output
from other utilities. This tool is not available for Windows.
watchgnupg is commonly invoked as
watchgnupg --force ~/.gnupg/S.log
OPTIONS
watchgnupg understands these options:
--force
Delete an already existing socket file.
--tcp n
Instead of reading from a local socket, listen for connects on TCP port n.
--verbose
Enable extra informational output.
--version
Print version of the program and exit.
--help Display a brief help page and exit.
EXAMPLES
$ watchgnupg --force /home/foo/.gnupg/S.log
This waits for connections on the local socket '/home/foo/.gnupg/S.log' and shows all log entries. To make this work the option log-file
needs to be used with all modules which logs are to be shown. The value for that option must be given with a special prefix (e.g. in the
conf file):
log-file socket:///home/foo/.gnupg/S.log
For debugging purposes it is also possible to do remote logging. Take care if you use this feature because the information is send in the
clear over the network. Use this syntax in the conf files:
log-file tcp://192.168.1.1:4711
You may use any port and not just 4711 as shown above; only IP addresses are supported (v4 and v6) and no host names. You need to start
watchgnupg with the tcp option. Note that under Windows the registry entry HKCUSoftwareGNUGnuPG:DefaultLogFile can be used to change
the default log output from stderr to whatever is given by that entry. However the only useful entry is a TCP name for remote debugging.
SEE ALSO gpg(1), gpgsm(1), gpg-agent(1), scdaemon(1)
The full documentation for this tool is maintained as a Texinfo manual. If GnuPG and the info program are properly installed at your site,
the command
info gnupg
should give you access to the complete manual including a menu structure and an index.
GnuPG 2.0.19 2014-06-26 WATCHGNUPG(1)
03-29-2010
ort one by one, I want to automate it.