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Old 07-24-2014, 02:39 AM   #1
packirisamy
LQ Newbie
 
Registered: Jul 2014
Posts: 3

Rep: Reputation: Disabled
Unhappy same shell for getting input from user,command line and files.


My program is

read a
read b
read c
echo $a
echo $b
echo $c

when i run it as ./shell.sh
it gets input from user and prints it.

when i run it as ./shell.sh < file.txt
it takes input from file.txt and assigns it to variables a,b and c.

when i run as ./shell.sh 1 2 3
i want the arguments to be stored in a,b and c
without any change of code...
CAN SOMEONE HELP ME SOON???
 
Old 07-24-2014, 03:54 AM   #2
jonnybinthemix
Member
 
Registered: May 2014
Location: Bristol, United Kingdom
Distribution: RHEL 5 & 6
Posts: 169

Rep: Reputation: Disabled
There's probably a more elegant way of doing it, but this sort of thing should work:

Code:
a=$1
b=$2
c=$3

if [ $# -eq 0 ]; then

read a
read b
read c 

echo $a
echo $b
echo $c

else

echo $a
echo $b
echo $c

fi
 
1 members found this post helpful.
Old 07-24-2014, 06:40 AM   #3
packirisamy
LQ Newbie
 
Registered: Jul 2014
Posts: 3

Original Poster
Rep: Reputation: Disabled
jonnybinthemix sir... thank you so much for your quick response...
 
  


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