Thanks bipinajith for helping..
There are slight differences between perl and tcl's regex function in this case. Nevertheless, thanks to your sharing, I think I've figured out the meaning of this tcl's regex function code:
Here's what I figured out:
The first bracket (\S+), means to search for characters or numbers or symbols except whitespaces (spacebar or tab). This means that at this phase, the searched pattern is abc/def/gh.
The next phase \/[^\/]+$ is to search for the last / plus one or more characters or numbers or symbols except the / symbol till the end of the string. Only the matched pattern inside the ( ) will be copied to GetString which means in this case abc/def
This is what I found out, please comment if I'm wrong.
Hi,
Can anyone please let me know the meaning of this line,i am not able to understand the egrep part(egrep '^{1,2}).This will search for this combination in beginning but what does the values in {}signifies here.
/bin/echo $WhenToRun | egrep '^{1,2}:$' >/dev/null (1 Reply)
Hi all Unix Gurus!
Since hours (even days :-)) I'm trying to find the correct pattern to search for IP addesses in text files.
The pattern to find a IP address itself is not too difficult:
'((||1{2}|2|2{2})\.){3,}(||1{2}|2|2{2})'
BUT, of course the above pattern is also matching lines like... (9 Replies)
Good Day,
Im new to scripting especially awk and sed. I just would like to ask help from you guys about a sed command that prints the line immediately after a regexp, but not the line containing the regexp.
sed -n '/regexp/{n;p;}' filename
What if my regexp is 3 word or a sentence. Im... (3 Replies)
Basically it should identify what ever is in between /*< >*/ (tags) and replace dbname ending with (.) with the words in between the tags
i.e.
DELETE FROM /*<workDB>*/epd_test./*<multi>*//*<version>*/epd_tbl1 ALL; into
DELETE FROM... (4 Replies)
If I don't explain my issue well enough, I apologize ahead of time, extreme newbie here to scripting.
I'm currently learning scripting from books and have moved on to the text Wicked Cool Shell Scripts by Dave Taylor, but there are still basic concepts that I'm having trouble understanding.
... (10 Replies)
i am beginner in shell scripting.
not able to understand what below line will do.
PS1=${HOST:=Žuname -nŽ}"$ " ; export PS1 HOST
below is the script
#!/bin/hash
PS1=${HOST:=Žuname -nŽ}"$ " ; export PS1 HOST ;
echo $PS1
and i getting the below output
Žuname -nŽ$ (25 Replies)
Hello,
I'm reviewing a tcl script, and for this line:
regexp {(\S+)\/+$} $string match $catch
if,$string == ab123c/de456f/try99/zxy
is there any possibility that $catch == ab123c/de456f/try99 ?
or it must only be $catch == ab123c/de456f/try99/zxy ?
Please advise. Thanks (1 Reply)
Hi
i was going through the script debugging technique. below example was given in the book.
1 #!/bin/sh
2
3 Failed() {
4 if ; then
5 echo "Failed. Exiting." ; exit 1 ;
6 fi
7 echo "Done."
8 }
9
10 echo "Deleting old backups,... (11 Replies)
I have this code
#!/bin/bash
LZ () {
RETVAL="\n$(date +%Y-%m-%d_%H-%M-%S) --- "
return RETVAL
}
echo -e $LZ"Test"
sleep 3
echo -e $LZ"Test"
which I want to use to make logentrys on my NAS. I expect of this code that there would be output like
2017-03-07_11-00-00 --- Test (4 Replies)