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Prompt for 2 variables if nothing is entered end script

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Top Forums Shell Programming and Scripting Prompt for 2 variables if nothing is entered end script
# 1  
Old 03-24-2010
Error Prompt for 2 variables if nothing is entered end script
What I'm trying to do is write a bash file that prompts for the user's name and what the want to name the output file. If nothing is entered in either prompt the script must end and not create the output file. This is what I have so far:

Code:
#!/bin/sh
echo "What is your name?"
read NAME
if [ -s "$NAME" ]
    then
        break
    else
       echo "No name given"
       exit
fi
echo "What would you like to name your file?"
read FILE
if [ -s "$FILE" ]
    then
        break
    else
        echo "No script name"
        exit
fi
echo "#########################################################################$
#######
#This is CSI 135 Project 1 Question 2
# Output file: $FILE
# Created by: $NAME
# Data and time: `date`
###############################################################################$
#######
Hello, world\!\!
I am the script $FILE"
> $FILE

# 2  
Old 03-24-2010
Hello, try -n instead of -s
# 3  
Old 03-24-2010
Error Thank you
That worked the only problem I'm having now is when the person inputs the filename they want ... I need that file to actually be created so that I can redirect the output to that file .... if I still have the same code as above changing the -s to -n what else is needed?
# 4  
Old 03-25-2010
Code:
echo "What is your name?"
read NAME
[ "$NAME"  = "" ] && echo "No name given" >&2 && exit 1
 
echo "What would you like to name your file?"
read FILE
[  "$FILE" = "" ] && echo "No script name" >&2 && exit 2

cat <<EOF >$FILE
#########################################################################$
#######
#This is CSI 135 Project 1 Question 2
# Output file: $FILE
# Created by: $NAME
# Data and time: $(date)
###############################################################################$
#######
Hello, world !
I am the script $FILE
EOF

If you like to set FILE is stdout after read then
Code:
exec >$FILE
# and stdout is now some file

# 5  
Old 03-25-2010

Code:
#!/bin/sh

printf "%s " "What is your name?"
read NAME
if [ -z "$NAME" ]
then
   echo "No name given"
   exit 1
fi

printf "%s " "What would you like to name your file?"
read FILE
if [ -z "$FILE" ]
then
    echo "No script name"
    exit 1
fi

echo "#########################################################################
# This is CSI 135 Project 1 Question 2
# Output file: $FILE
# Created by: $NAME
# Data and time: `date`
#########################################################################
echo "Hello, world!!
I am the script $FILE" > "$FILE"

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