load default value , shell script

moata_u · 03-10-2011, 01:32 AM

i wrote an script that configure files..am thinking to add option that load an default values in file , procedure :
1.user enter file name
2.check if file is exist
3.check if file readable.
3.read file line by line, and assign each line in variable , so i can used 4 seting up the configuration.

any idea would be fine !

EricTRA · 03-10-2011, 01:40 AM

Hello,

Any idea about what? On how to proceed? You say you wrote a script so how about posting what you have and commenting what you're missing or where you're in doubt? The more information you provide, the better we can help you.

Kind regards,

Eric

grail · 03-10-2011, 01:44 AM

Sounds like some echoes, reads and at least one loop. If this answer is a little too vague it might have something to do with how much or little information you have provided.

moata_u · 03-10-2011, 01:44 AM

###What is the way for assigning each line for variable.

Quote:

process (){
#(2)# then process each variable.
}

FILE=''
read -p "Please enter name of default file : " FILE

if [ ! -f $FILE ]; then

echo "$FILE : does not exists "
exit 1
elif [ ! -r $FILE ]; then

echo "$FILE : can not read "
fi

exec 0<"$FILE"

while read -r line
do
##(2)#how can i assign each line for an variable
done

corp769 · 03-10-2011, 01:57 AM

Quote:

Originally Posted by moata_u

process (){
#(2)# then process each variable.
}

FILE=''
read -p "Please enter name of default file : " FILE

if [ ! -f $FILE ]; then

echo "$FILE : does not exists "
exit 1
elif [ ! -r $FILE ]; then

echo "$FILE : can not read "
fi

exec 0<"$FILE"

while read -r line
do
##(2)#how can i assign each line for an variable
done

???

EricTRA · 03-10-2011, 01:58 AM

Hello,

Would you mind putting your code in CODE tags for readability please? And what other variables do you want/need/have? You're not making any sense to me. The only variable I can see is for the filename '$FILE'.

Kind regards,

Eric

moata_u · 03-10-2011, 02:04 AM

my question is how to assign each line to an variable thus , variable i can use it in my code...
ex :

file.txt contain :
192.168.0.20
billz
billing
..etc

* than read file and each line assign to an variable ex:
${variable[0]} = 192.168.0.20
${variable[1]} = billz
${variable[2]} = billing
.

EricTRA · 03-10-2011, 02:20 AM

Hi,

If you want to loop through a file you can use structures like this:

Code:

cat file.txt | while read line;
do
your commands
done

or another one:

Code:

for i in $(cat file.txt)
do
your commands
done

The 'your commands' part is where the work will be done. Since this 'smells' like some type of homework, let me point you to some good documentation on the subject you need.
Bash Arrays
More directly related to your questions

Kind regards,

Eric

grail · 03-10-2011, 09:05 AM

I don't see a reason why your example would not work? Each line of the file will be stored in the parameter 'line' which then can be acted on. Or did I miss something?