[SOLVED] NSH Shell Scripting Question

pr0tocoldan · 06-24-2011, 12:55 PM

I'm writing a script and I have doubts on how to assign values to an already established variable. The value for the vatriable would be coming from a file with three columns. I'm using the awk command for this. Am I doing it correctly? which of the following two ways is the better one or if both are wrong which one should I use?

#!/bin/nsh

inputfile=$1
rolename=$2
roleauthprofile=$3
userid=$4

Option 1:
or properties in 'cat $inputFile'
do
awk '{grep $1=$rolename}'| awk '{grep $2=$roleauthprofile}'|awk '{grep $3=$userid}'

Option 2:
awk '{export $1=$rolename}'| awk '{export $2=$roleauthprofile}'|awk '{export $3=$userid}'
echo $rolename
echo $roleauthprofile
echo $userid

I appreciate your help.

Regards,

pr0tocoldan

pr0tocoldan · 06-24-2011, 09:47 PM

for properties in 'cat $inputfile'
do
rolename = cat $inputfile : awk {print $1}
roleauthprofile= cat $inputfile : awk {print $2}
userid = cat $inputfile : awk {print $3}

unSpawn · 06-24-2011, 09:51 PM

I don't know Nsh but if it's similar to Bash / Bourne Shell (just change the first line to test) then here's a wee example assigning variables. Asserting the input file has space separated values you test if the file exist (else just exit cleanly), cat it and use readline to set values and echo them. Assigned values exist inside the "while" loop and you can do anything with it there.

Code:

#!/bin/sh
test -f "$1" && cat "$1" | while read NAME PROFILE USERID; do
 echo "$NAME $PROFILE $USERID"
done
exit 0

Code:

function shellhelp() { echo "Bash scripting guides:
http://www.tldp.org/HOWTO/Bash-Prog-Intro-HOWTO.html 
http://www.tldp.org/LDP/Bash-Beginners-Guide/html/index.html 
http://www.gnu.org/software/bash/manual/html_node/index.html
http://www.grymoire.com/Unix/Sh.html
http://www.tldp.org/LDP/abs/html/; }