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Simple shellscript help please - reading parameters and checking whether the first is a directory

Posted on 2004-08-22
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Last Modified: 2010-04-21
Ok, my objective is as follows:

Write a fully commented bourne shell script program that outputs how many parameters were given on the command line, if there is more than one parameter given the program should report to the user if the first parameter exists as a directory or not.

this is the shellscript so far:

#!/bin/sh

read input
echo "The number of parameters you entered was $#"

if [ -d $1 ]
then
echo "The first parameter you entered is a directory"
else
echo "The first parameter you entered is not a directory"
fi

Problem: when i run the shellscript program if always gives me "0" as the number of entered parameters, and always says "the first parameter you entered is a directory" even when the directory doesn't exist, so clearly this isn't working,

any help on this matter appreciated, thanks alot, seremaz
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Question by:seremaz
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Expert Comment

by:avizit
ID: 11864212
>>>> read input

since you are reading from command line arguments you dont need that line

comment out that line and your script should work fine
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Author Comment

by:seremaz
ID: 11864221
er, if i omit 'read input' then the program runs without any input from the user, so how can it find out how many parameters there are, and whether the first parameter is a directory, if you dont give the program any parameters? i used read input as thats the only way i could find of actually entering parameters for the program to read
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Accepted Solution

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avizit earned 250 total points
ID: 11864237
oh that way you have to give the input on the command line

as in  if your script is named test.sh  you can run it as

./test.sh  <your input>  <enter key>
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Author Comment

by:seremaz
ID: 11864253
ahhhhh! thankyou, in that case it works just as i want it to, perfect
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