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Old 04-23-2010, 06:43 PM   #1
indur
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Registered: Apr 2010
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bash scripting for dummy's :)


guess what i'm new to scripting

I have this assignment for shool and i'm stuck for hours now and clueless.
So if anyone could help me out, put me on the right track.

What i want to do is make a list for the current directory, then checking if it already exists if so ask the user if he wan'ts to overwrite, if no go back, if yes, overwrite the file.
At last if the file doesn't exist i want to create it and fill it up with the list from the directory.
This is how i failed

if [ -e dirdump.dmp ]; then
echo " The file already exists , overwrite? y/n "
read input
if [$input == "n"]; then
break
elif ["$input" = "y"]; then
ls >> dirdump.dmp
fi
else
ls >> dirdump.dmp
echo -n "U dump is aangemaakt en vind u terug in : "
pwd
fi

I get the following error: script.sh: 15 [y: not found

This is when i choose to type y.

Anyone?
 
Old 04-23-2010, 07:00 PM   #2
smbell100
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You need spaces in the brackets, so

[$input == "n"] needs to be [ $input == "n" ].

You would probably be better off with a case or select statement.
 
Old 04-23-2010, 08:15 PM   #3
MTK358
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See the "LinuxCommand" tutorial in my signature. It has a great section on BASH scripting.
 
Old 04-24-2010, 03:46 AM   #4
grail
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I believe the previous posts will help solve your problem, but just to be a little picky,
when scripting, try and be consistent as it helps the next person reading your script to follow what is going on:
Code:
if [$input == "n"]; then #use of double equals (=) sign

elif ["$input" = "y"]; then #use of inverted commas (") around $input and single equals (=) sign
 
Old 04-24-2010, 09:04 AM   #5
indur
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Registered: Apr 2010
Posts: 8

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thanks for the quick response

I have solved it by using the advise that was given here.

The assigment is going well now!

Last edited by indur; 04-24-2010 at 09:05 AM.
 
Old 04-24-2010, 09:29 AM   #6
lugoteehalt
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Registered: Sep 2003
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Distribution: Debian
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Just a bit mystified. Doesn't ls >> dirdump *append* rather than overwrite?

Incidentally, does the script imply you haven't got the noclobber option set?
Code:
lugo@fido:~/Documents/Science$ set|grep clobber
SHELLOPTS=braceexpand:emacs:hashall:histexpand:interactive-comments:monitor:noclobber
 
Old 04-24-2010, 09:33 AM   #7
cola
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Registered: Sep 2007
Location: Dhaka,Bangladesh
Distribution: Debian
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Quote:
Originally Posted by indur View Post
thanks for the quick response

I have solved it by using the advise that was given here.

The assigment is going well now!
You can mark the thread as "[SOLVED]".
 
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