Read FIle line by line and perform Script 2

[aoroca]

How I can read a file line by line and compare results with some parameters then performe automatically a script.

I wish read the last line in File1 which is populated periodically.

FILE1

line1
line2
...
...
...
LineN Now read this line
...
...
LineN+X Then i wish read this line and the script
running

The script must read the file and know in what line stay at last time, and so on

 

[fredericofonseca]

assuming that "list" is the file you are "reading"

while read listline;

do

echo "$listline"

done < list

where the &quot;echo ....&quot; will be whatever commands you require



Regards

Frederico Fonseca
SysSoft Integrated Ltd

http://www.syssoft-int.com

 

[SamBones]

If you're trying to &quot;follow&quot; a file that's still being written to, look into using &quot;[tt]tail -f[/tt]&quot;. Something like...

#!/bin/ksh

tail -f File1.lis | while read LINE
do
    # Do something with $LINE

    print "$(date): ${LINE}"
done

That way, as things are written to the file, they will be picked up and processed by your script.

Hope this helps.

 

[aoroca]

Thanks a lot, MiScript work properly, its funny !!
I appreciate your timely information.
Bye and Good Luck

 

[aoroca]

Hey SamBones, I need your help again.

I need read line by line a File, and when match some info with grep then does something, why: i.e.



#!/bin/ksh

tail -f File1.lis | while read LINE
error=`grep &quot;something on LINE&quot; LINE`

if [ -n $error] then
#print LINE which match error condition
print &quot;$(date): ${LINE}&quot;
fi
done



But when I run script I have some problems due error match &quot;something on LINE&quot; with all fields in line, How I can resolve this trouble.

 

[SamBones]

I don't think I understand your problem. If you mean you only want to process lines that have &quot;[tt]something on LINE[/tt]&quot; in it, then this should work...

#!/bin/ksh

MATCH="something on LINE"

tail -f File1.lis | grep "${MATCH}" | while read LINE
do
    # Do something with $LINE

    print "$(date): ${LINE}"
done

This filters for the match pattern before it gets to the while loop.

Plus you forgot the &quot;do&quot; in your example.

Hope this helps.

 

[aoroca]

I modified myscript but when it perform read LINE command, dont work, it stay in standby state, look

--------------------------------------
#!/bin/ksh
AA=`date +'%Y'`
MM=`date +'%m'`
DD=`date +'%d'`
ruta=/oracle/rdbms/log
fecha=$AA$MM$DD

MATCH=&quot;Current&quot;

tail -f $ruta/alert_atel.log | grep &quot;${MATCH}&quot; | while read LINE
do
echo &quot;5715851388 $AA$MM$DD ${LINE}&quot; > error_actv.txt;
./$ruta/send_sms error_actv.txt;
print &quot;$(date): ${LINE}&quot;
done
-------------------------------

the output is:

$ sh -x prueba.sh
+ date +%Y
AA=2003
+ date +%m
MM=12
+ date +%d
DD=11
ruta=/oracle/rdbms/log
fecha=20031211
MATCH=Current
+ tail -f /oracle/rdbms/log/alert_atel.log
+ grep Current
+ read LINE


and alert_atel.log is working and populating with info with MATCH=current and dont execute the next part of my script in while loop.

Thanks alot for your time

 

[aoroca]

This is the file to check:

tail alert_atel.log
ORA-00600: internal error code, arguments: [2845], [0], [60], [0], [], [], [], []
Thu Dec 11 19:31:26 2003
Errors in file /oracle/rdbms/log/atel_ora_521.trc:
ORA-00600: internal error code, arguments: [2845], [0], [60], [0], [], [], [], []
Thu Dec 11 19:32:12 2003
Thread 1 advanced to log sequence 54310
Current log# 3 seq# 54310 mem# 0: /oracle/dbs/log3atel.dbf
Thu Dec 11 19:33:57 2003
Thread 1 advanced to log sequence 54311
Current log# 1 seq# 54311 mem# 0: /oracle/dbs/log1atel.dbf
$ date
Thu Dec 11 19:34:07 GMT 2003
$ tail alert_atel.log
Current log# 2 seq# 54312 mem# 0: /oracle/dbs/log2atel.dbf
Thu Dec 11 19:37:40 2003
Thread 1 advanced to log sequence 54313
Current log# 3 seq# 54313 mem# 0: /oracle/dbs/log3atel.dbf
Thu Dec 11 19:38:00 2003
Errors in file /oracle/rdbms/log/atel_ora_521.trc:
ORA-00600: internal error code, arguments: [2845], [0], [60], [0], [], [], [], []
Thu Dec 11 19:39:20 2003
Thread 1 advanced to log sequence 54314
Current log# 1 seq# 54314 mem# 0: /oracle/dbs/log1atel.dbf

and my script dont work properly, if you see MATCH=current is ok in some lines... what happend?

 

[PHV]

And something like this ?

tail -f $ruta/alert_atel.log | while read LINE
do
  case "$LINE" in *$MATCH*)
    echo "5715851388 $AA$MM$DD  ${LINE}">error_actv.txt
    ./$ruta/send_sms error_actv.txt
    print "$(date): ${LINE}"
  esac
done

Hope This Help
PH.

 

[aoroca]

PHV tahnks a lot, Your info was timely.

 

[aoroca]

I have FILE1
#MOBILE $MESSAGE

I need check if this file exist and if it exists I need perform something with each line starting with #MOBILE, because later FILE1 will be removed and created with other different datas. And script must be checking if FILE1 exist.

How I can setup last script for this tasks?

Thanks a lot

 

[tshot]

if ur are in 'sh' try

fl=FIL1
if [ -r "$fl" ]
then
    grep \#MOBILE "$fl"

    if [ $? -eq 0 ]
    then
        echo MOBILE found
    fi
fi

and in ksh

[[ -r "$fl" &&  "`grep -q \#MOBILE $fl`" -eq 0 ]] && echo MOBILE found

pls note that sh can also have comapt script as in ksh




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