topic Awk: split into fields, and then split again in Operating System - HP-UX

Awk: split into fields, and then split again

Robert A. Pierce — Fri, 04 Jun 2004 14:37:42 GMT

Good day!

I have text files formatted like this:

===================================================
Logging begins at: [2004.05.31 00:24:20]
r [2004.05.31 00:24:34] (348) reason1: more text: foofoo STRING2: [9.8.7.5]
r [2004.05.31 00:24:47] (325) reason1: more text: var bar car STRING: txt.info.dot [4.3.2.1]
r [2004.05.31 00:25:20] (476) other reason text: variable lenght ZZZZZ: stuff.i.want.now [5.6.7.8]
r [2004.05.31 00:25:20] (391) reason1: some other text: foo BAR: stuff.wanted.txt [1.2.3.4] various text of various length
[and so on]

I can pull out the portion in the second square brackets with AWK like this:

> BEGIN { FS="[][]" }
> {print $4}

(NB: FS="[[]]" does not work!)

Now, what I'd like to do is split the $3 portion, colon-delimited, and get the last field. In the text above, that would be:

(blank)
txt.info.dot
stuff.i.want.now
stuff.wanted.txt

Then I'd like to print $4, (new_$3) like this

[1.2.3.4] (stuff.wanted.txt)

I've looked in the slender loris book, comp.lang.awk, and here, but either I am not searching properly or I'm to ignorant to understand what I'm reading.

Awk preferred; perl answers are nice, but no "one-liners," please. :-)

Thanks,

Rob

Re: Awk: split into fields, and then split again

Geoff Wild — Fri, 04 Jun 2004 14:44:16 GMT

Can't you just set the delimeter?

awk -F:

Rgds...Geoff

Re: Awk: split into fields, and then split again

curt larson_1 — Fri, 04 Jun 2004 14:46:20 GMT

split your line into an array

split($0,a,":");

then split array element

split(a[4],b,"[");

print b[1];

Re: Awk: split into fields, and then split again

Robert A. Pierce — Fri, 04 Jun 2004 14:48:53 GMT

So, would you do something like

BEGIN { FS="[][]" }

{
print $4
temp=$3
FS=:
print "("$NF")\n"
}

I wasn't able to get that to work.

what am I missing?

Re: Awk: split into fields, and then split again

curt larson_1 — Fri, 04 Jun 2004 14:50:43 GMT

of course it does seem to be easier if you use colon as your field seperator

awk -F: '{
split($4,a,"[");
printf("[%s,%s\n",a[2],a[1]);
}'

Re: Awk: split into fields, and then split again

curt larson_1 — Fri, 04 Jun 2004 14:52:48 GMT

robert,

BEGIN { FS="[][]" }

{
print $4
temp=$3
FS=:
print "("$NF")\n"
}

I wasn't able to get that to work.

what am I missing?

no semicolon at the end of statement
print $4;
temp=$3;
etc

Re: Awk: split into fields, and then split again

curt larson_1 — Fri, 04 Jun 2004 14:55:55 GMT

robert,

not sure what your trying to do with this:
print "("$NF")\n"

print number of fields:
print NF;

print the last field:
print $NF;

usually i think what you want is to do this
printf("%s\n",$NF);

Re: Awk: split into fields, and then split again

Robert A. Pierce — Fri, 04 Jun 2004 14:56:28 GMT

Curt,

BEGIN { FS="[][]" }

{
print $4

sizeOfArray =split($3,name,":");
print name[sizeOfArray];

}

Works mostly!

On some records it's returning too much; let me see why . . . .

Re: Awk: split into fields, and then split again

Robert A. Pierce — Fri, 04 Jun 2004 15:00:03 GMT

I'm not using the colon at first, because there is a variable number of colons involved.

The constants are: the SECOND square-bracketed field, and the LAST colon-delimited field prior to that 2nd [] field.

Re: Awk: split into fields, and then split again

Robert A. Pierce — Fri, 04 Jun 2004 15:12:03 GMT

This works:

BEGIN { FS="[][]" }

match($1,"^r") >0 {

sizeOfArray =split($3,name,":");
print $4" ("name[sizeOfArray]")";

}

The split() is what did it.

Thanks to all who replied!

Rob