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awk searching between two files

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# 1  
Old 03-12-2008
MySQL awk searching between two files
hi there,
im writing some script in awk; in few words i have a list from router (mac address- ip address) and the second list with only the mac addresses.
the thing is that i want search list from router for the first mac address; if found - print the ip address, if not print error; then search the router list for the second mac address, if found print ip.. etc.
summarize: i have two files, router and macs like this (respectivly)
43:43:43:43:43 10.0.0.3
43:43:43:43:45 10.0.0.4
43:43:43:43:44 10.0.0.5
43:43:43:43:46 10.0.0.6
and
43:43:43:43:43
43:43:43:43:46

and as result im looking for:
43:43:43:43:43 10.0.0.3
43:43:43:43:46 10.0.0.6

im doing it in this way:
cat router | awk '{
getline tmp < macs
if ($1 = tmp) print
}'

i know, it is wrong, that is why im posting Smilie

any ideas?

cheers.
# 2  
Old 03-12-2008
Given your example output and you explanation:

Code:
$ cat file1
43:43:43:43:43 10.0.0.3
43:43:43:43:45 10.0.0.4
43:43:43:43:44 10.0.0.5
43:43:43:43:46 10.0.0.6
$ cat file2
43:43:43:43:43
43:43:43:43:46

it's not clear if you want this:

Code:
$ nawk 'NR==FNR{x[$1];next}$1 in x' file2 file1
43:43:43:43:43 10.0.0.3
43:43:43:43:46 10.0.0.6

this:

Code:
$ nawk 'NR==FNR{x[$1];next}$1 in x||$0="not found"' file2 file1
43:43:43:43:43 10.0.0.3
not found
not found
43:43:43:43:46 10.0.0.6

this:

Code:
$ nawk 'NR==FNR{x[$1];next}($1 in x&&$0=$2)||$0="not found"' file2 file1
10.0.0.3
not found
not found
10.0.0.6

this:

Code:
$ nawk 'NR==FNR{x[$1];next}($1 in x&&$0=$2)||$0=$1" not found"' file2 file1
10.0.0.3
43:43:43:43:45 not found
43:43:43:43:44 not found
10.0.0.6

or this:

Code:
$ nawk 'NR==FNR{x[$1];next}$1 in x||$0=$1" not found"' file2 file1
43:43:43:43:43 10.0.0.3
43:43:43:43:45 not found
43:43:43:43:44 not found
43:43:43:43:46 10.0.0.6

Use nawk or /usr/xpg4/bin/awk on Solaris.

Or just this, of course Smilie

Code:
$ fgrep -f file2 file1
43:43:43:43:43 10.0.0.3
43:43:43:43:46 10.0.0.6

Last edited by radoulov; 03-12-2008 at 02:07 PM..
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