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Reading arguments for a shell script from file

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# 1  
Old 01-11-2012
Reading arguments for a shell script from file
I have a shell script that takes 2 arguments. I will have to execute this script multiple times with different values for the arguments.

for example,
Code:
./shscript env1 value1
./shscript env1 value2
./shscript env2 value3
./shscript env3 value4
./shscript env1 value5
./shscript env3 value6
./shscript env2 value7
.
.
./shscript env2 valuen

I want to put the above in a master shell and i want to put the arguments in another file.

I would like my shell to read the arguments from the file IN ORDER and then execute the ./shscript. It is important that the arguments are read in order.

Can someone please tell me how this is done? thanks in advance
# 2  
Old 01-11-2012
Option 1:
Code:
$ cat parameters.txt
env1 value1
env1 value2
env2 value3
env3 value4
env1 value5
env3 value6
env2 value7

Code:
while read x y
do
    ./shscript $x $y
done < parameters.txt

Option 2:
Code:
$ cat master.sh
./shscript env1 value1
./shscript env1 value2
./shscript env2 value3
./shscript env3 value4
./shscript env1 value5
./shscript env3 value6
./shscript env2 value7
$
$ ./master.sh

This User Gave Thanks to balajesuri For This Post:
goddevil
# 3  
Old 01-11-2012
Code:
#!/bin/bash

for x  in `cat parameter.config`
do
  sh script.sh $x 
done

thanks,
venkat
Last edited by Franklin52; 01-11-2012 at 07:23 AM.. Reason: Please use code tags for code and data samples, thank you
This User Gave Thanks to venkatareddy For This Post:
goddevil
# 4  
Old 01-11-2012
Quote:
Originally Posted by balajesuri
Option 1:
Code:
$ cat parameters.txt
env1 value1
env1 value2
env2 value3
env3 value4
env1 value5
env3 value6
env2 value7

Code:
while read x y
do
    ./shscript $x $y
done < parameters.txt

Thanks lads.. That worked a charm.
I have another question. The same master all the environment variables in a file and then read the file from my shell. How do i go about calling the different variables from the one file. Thanks in advance guys

The following is the sample of the environment variables.
Code:
Host = servername
Port = 13122
site = sitename
Javahome = /bin/java
platform= pb
filelist=x.guiclient.download
boot=bot.jar

Last edited by goddevil; 01-11-2012 at 11:30 AM..
# 5  
Old 01-11-2012
Code:
Host="servername"
Port="13122"
site="sitename"
Javahome="/bin/java"
platform="pb"
filelist="x.guiclient.download"
boot="bot.jar"

If you hold your parameter file in correct unix Shell format (no spaces either side of the equals sign and variables in quotes) you can set all the variables with.

Code:
. ./parameter_file_name

That is dot-space-dot-slash-filename.
This User Gave Thanks to methyl For This Post:
goddevil
# 6  
Old 01-11-2012
Quote:
Originally Posted by methyl
Code:
Host="servername"
Port="13122"
site="sitename"
Javahome="/bin/java"
platform="pb"
filelist="x.guiclient.download"
boot="bot.jar"

If you hold your parameter file in correct unix Shell format (no spaces either side of the equals sign and variables in quotes) you can set all the variables with.

Code:
. ./parameter_file_name

That is dot-space-dot-slash-filename.
Cheers Methyl.

I understand that i will be able to set the variables by using . ./parameter_file_name

But i will also need some of the variables further down in the script. For example:

Code:
#!/bin/sh
Host=servername
Port=13122
site=sitename
Javahome=/bin/java
policy=jv.policy
platform=pb
filelist=x.guiclient.download
boot=bot.jar
.
.
.
java -cp $boot -Djava.security.policy=$policy-codebase=http://$Host:$Port/$Filelist   /Sitename:$Site /Platform_name:$platform

I am not great with awk / sed so any help would be greatly appreciated.

I have other requirements to read from a file as well(i am trying to get rid of all hardcoded data) and this will help me out greatly with respect to others as well. Thanks
# 7  
Old 01-11-2012
I don't understand the problem. Variables you set in the external file the way methyl suggests can indeed be used in your program.
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