nixCraft

fahur · #1 (**permalink**) 10-04-2006, 04:52 PM

Hi!

I want to write a script which reads and writes some data from files.

Here it goes:

Code:

#!/bin/sh

echo `gsh list_atm_vc -eq { 2 11 2 1 } > list_atm_vc.txt`

mFile="list_atm_vc.txt"

echo `wc -l list_atm_vc.txt > temp`

read num rest < "temp"

PORT=""
VPI=""
VCI=""

i="1"

while [ 1 ]
do
       if [ "$i" = "0" ]; then
               read PORT VPI VCI || break
               echo `gsh get_atm_vc -eq { 2 11 2 1 } -port $PORT -vpi $VPI -vci $VCI`
       fi
       i=`expr $i + 1`
done < $mFile

rm $mFile
rm $tFile

What it does (or what I want it to do

:

Following command:

Code:

echo `gsh list_atm_vc -eq { 2 11 2 1 } > list_atm_vc.txt`

produces output like this (file: list_atm_vc.txt):

Code:

Port VPI VCI
0    0   101
0    0   100

then for each line, except the first and last (empty) I invoke a command:

Code:

echo `gsh get_atm_vc -eq { 2 11 2 1 } -port $PORT -vpi $VPI -vci $VCI`

where $PORT, $VPI and $VCI variables are being read from list_atm_vc.txt file.

To overlook first and last line form above mentioned line I check number of lines with command:

Code:

echo `wc -l list_atm_vc.txt > temp`

and write it to the file called 'temp'.

My problem is that I can't figure out, how to get this number of lines (get errors or no data in variable

) and use it in IF clause.

The output of above command is:

Code:

       4 list_atm_vc.txt

sa I have to read the first part of this output.

To sum up...

I'd like to:
1. Invoke a command which gives an output
2. Check number of lines of above output
3. Invoke another command with parameters read from lines, EXCEPT first and last line.

Thanks for any idea...

--
fahur

sweta · #2 (**permalink**) 10-04-2006, 11:57 PM

So you want to read data from list_atm_vc.txt file

BTW which Embedded Linux version/distro you are using?

fahur · #3 (**permalink**) 10-05-2006, 08:48 PM

Quote:

Originally Posted by sweta

So you want to read data from list_atm_vc.txt file

Yes... and use in IF clause...

Quote:

Originally Posted by sweta

BTW which Embedded Linux version/distro you are using?

Whis is what I got when logging in:

Code:

 Sun Microsystems Inc.   SunOS 5.8       Generic Patch   October 2001

Thanks...

--
fahur

nixcraft · #4 (**permalink**) 10-06-2006, 02:04 AM

Quote:

Originally Posted by fahur

Invoke another command with parameters read from lines, EXCEPT first and last line.fahur

Following command will remove first and last line and put data to a file called /tmp/port.out.txt

Code:

grep -vE "^$|Port" file.txt >/tmp/port.out.txt

View data

Code:

cat /tmp/port.out.txt

Output:

Code:

0    0   101
0    0   100

Use following shell login to read each line data into a variable called F1, F2, F3.

Code:

n=1
INFILE="data.txt"
OUT="/tmp/port.out.txt"
grep -vE "^$|Port" $INFILE >$OUT
while read line
do
  F1=$(echo $line | awk '{ print $1}')
  F2=$(echo $line | awk '{ print $2}')
  F3=$(echo $line | awk '{ print $3}')
  # use $F1, $F2, $F3 with IF command
  echo "Data for line # $n is $F1 $F2 $F3"
  n=$(expr $n  + 1)
done < $OUT

Note I am using BASH shell if you are using different shell you may need to change commands. But logic remains the same.

fahur · #5 (**permalink**) 10-09-2006, 03:59 PM

BiG thanks!

I've made some changes for my system and it worked perfectly

Thanks again...

--
Rgds
fahur

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