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[BASH/SH] Regex/Rematching Problems

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Top Forums Shell Programming and Scripting [BASH/SH] Regex/Rematching Problems
# 1  
Old 04-07-2011
Network [BASH/SH] Regex/Rematching Problems [RESOLVED]
Hi anyone,
since Sunday I try to create a schellscript that reads the last 10 lines of text out of a log and parses the guid's of the entrys in there.
The log looks like this:
Code:
ClienUserinfo: ... \cl_guid\XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX\...

i tried to parse it like this:
Code:
for line in $(tail -n 10 $log );
    do
        #is it a line we want to catch??
        if [[ $newline =~ [C][l][i][e][n][t][U][s][e][r][i][n][f][o][:] ]]; then
            #get the guid
            if [[ $newline =~ [c][l][_][g][u][i][d][\\](................................) ]]
            then
                  guid="${BASH_REMATCH[1]}"
                echo found guid
                echo $guid
            else 
                echo error, no guid
            fi
    done

This works only if the given guid in the logifle starts with a Letter, if the first Character is a number, it gets some wrong crap out.

I am looking forward to find help,
S0lll0s

PS: pls dont mess my code up so i dont understand it anymore, thxSmilie
Last edited by s0lll0s; 04-08-2011 at 03:38 PM..
# 2  
Old 04-07-2011
Could you please provide and example of output of
Code:
tail -10 yourlogfile

and let us know what result you need
# 3  
Old 04-07-2011
Code:
$ tail -10 file  | ruby -e 'while s=gets;puts s.gsub(/.*cl_guid\\(.*?)\\.*/,"\\1") if /ClienUserinfo/;end'
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

# 4  
Old 04-07-2011
How is $newline getting set in your script?

---------- Post updated at 11:03 AM ---------- Previous update was at 10:50 AM ----------

This seem to work OK for me:

Note:
Uses read -r to avoid \ processing
No need for all the [ and ] in match
No "t" in ClienUserinfo

Code:
tail -n 10 $log | while read -r
do
    #is it a line we want to catch??
    if [[ "$REPLY" =~ ClienUserinfo: ]]; then
        #get the guid
        if [[ "$REPLY" =~ cl_guid\\(................................) ]]
        then
            guid="${BASH_REMATCH[1]}"
            echo found guid
            echo $guid
        else
            echo error, no guid
        fi
    fi
done

# 5  
Old 04-08-2011
thx all for the replys, will test it in next time!

---------- Post updated at 03:58 PM ---------- Previous update was at 06:57 AM ----------

@ctsgnb:
$newline loooks like this (if i want to use it):
Code:
2:35 ClientUserinfo: 0 \ip\localhost\name\test\racered\2\raceblue\2\rate\8000\ut_timenudge\0\cg_rgb\255 0 0\funred\gasmask,h_head\funblue\gasmask,h_head\cg_predictitems\0\cg_physics\1\gear\GZAARWA\cl_anonymous\0\sex\male\handicap\100\color2\5\color1\4\team_headmodel\*james\team_model\james\headmodel\sarge\model\sarge\snaps\20\teamtask\0\cl_guid\F6F1365D96239BB0C6BB7CE6A74C064B\weapmodes\00000110220000020002

any other lines dont contain ClientUserinfo

@ Chubler_XL
just misspelling, its "ClientUserinfo"
Somehow it doesnt work, it just reads a few lines, and a few it doesnt. also it doesnt read the whole line, it stops after a few lines.
Code:
tail -n 10 $log | while REPLY=read -r
do
    #is it a line we want to catch??
    if [[ "$REPLY" =~ ClienUserinfo: ]]; then
....

but it didnt work.

@Kurumi i dont get how i should read the variable now. I tried adding "print $s" at the end but it returned the whole last 10 lines.
Last edited by s0lll0s; 04-08-2011 at 11:18 AM..
# 6  
Old 04-08-2011
Ooops

Code:
tail -10 yourlogfile | sed '/ClientUserinfo/!d;s/.*cl_guid\\//;s/\\.*//'

Code:
# cat tst
0
1
2
3
2:35 ClientUserinfo: 0 \ip\localhost\name\test\racered\2\raceblue\2\rate\8000\ut_timenudge\0\cg_rgb\255 0 0\funred\gasmask,h_head\funblue\gasmask,h_head\cg_predictitems\0\cg_physics\1\gear\GZAARWA\cl_anonymous\0\sex\male\handicap\100\color2\5\color1\4\team_headmodel\*james\team_model\james\headmodel\sarge\model\sarge\snaps\20\teamtask\0\cl_guid\F6F1365D96239BB0C6BB7CE6A74C064B\weapmodes\00000110220000020002
5
6
7
8
9
10
# tail tst | sed '/ClientUserinfo/!d;s/.*cl_guid\\//;s/\\.*//'
F6F1365D96239BB0C6BB7CE6A74C064B
#

Last edited by ctsgnb; 04-08-2011 at 11:41 AM..
# 7  
Old 04-08-2011
I didn't write this, it was in RegExr as a saved expression. I suck at regex's but maybe it'll help you.
Code:
\{[0-9a-fA-F]{8}\-[0-9a-fA-F]{4}\-[0-9a-fA-F]{4}\-[0-9a-fA-F]{4}\-[0-9a-fA-F]{12}\}

The nice thing about the tool is that it will test your regex for you and has a bunch of saved regex's which is why I like it Smilie

You can find it at, exploded link since I don't have 5 posts yet and can't post links.

gskinner dot com forwardslash RegExr
Last edited by Scott; 04-08-2011 at 03:14 PM..
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