Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted!
1. The problem statement, all variables and given/known data:
STEP 1: Create a Bash shell script (myscript) inside the a2 directory. The script should allow the user to pass a 3 digit number to this script when it runs. Make sure that the parameter/argument entered by the user consists of exactly 3 numbers. If it’s not 3 numbers, then give an appropriate error message and exit with appropriate exit status. If the parameter entered was a 3 digit number, then display it.
This script should create a subdirectory called ‘numbers’ inside the a2 directory. If that directory already exists, it should delete the existing one and create a new one.
The script should check the numbers and determine whether they are unique. For example, if the numbers passed to this script are 123, the script should create file1, file2 and file3 (inside the ‘numbers’ directory). If last 3 digits are 121, then create file1 and file2. Your script should now list the files you have created.
2. Relevant commands, code, scripts, algorithms:
STEP 2: The script should now check for the existence of the ‘products’ file in a2 directory. If it does not find that file, it should give an error message and exit. If the file does exist, it should display the contents of the file. Then it should cut the 2nd field (product name) from each line of the file (hint: use the cut command and use comma as the delimiter to pick the 2nd field). Capture the product names that are being cut into a separate file ‘names’. Then display the contents of this file ‘names’. Now the script should use the appropriate command to count the number of lines in the ‘names’ file and display a message indicating how many products there are in the products file. For example, if you had 6 products in your products file, this message should say “I have 6 products in my product file” by using the number it obtained from counting the lines.
3. The attempts at a solution (include all code and scripts):
4. Complete Name of School (University), City (State), Country, Name of Professor, and Course Number (Link to Course):
Seneca, Toronto, Canada, Lloyd, ULI101
Note: Without school/professor/course information, you will be banned if you post here! You must complete the entire template (not just parts of it).
Last edited by DukeNuke2; 08-11-2012 at 12:46 PM..
I think you're a bit confused on the idea of positional parameters. They're the ones you get when you run the script, like ./myscript.sh 999
$1 would be 999 in that situation.
Your script looks mostly okay actually. You've got the correct syntax for if, which is a bit tricky. Though =~ only works in BASH or really new KSH. case ought to work everywhere.
As for how to check for the existence of files, that's another if, like if [[ -d "foldername" ]] See Test Operators for details on this and more flags.
I am trying to code an if statement that accepts two parameters and see if those parameters are in another file called teledir.txt. If it already exists in the file, it is to say "Entry Exists". If not, I add it to the file and say "Entry Added". This is the code I have so far:
if ; then
... (1 Reply)
I'm new with 'sed' and for sure something still I don't understand yet with it. If you see my output on ">Output..." portion, the new directory still on "source_dir" instead of "dest_dir". You may disregard for the "tar" part, this is just a test script, just for me to understand 'sed' using the... (3 Replies)
Hi,
I have a script which will be executed using the below command,
bin/nutch crawl urls -dir /data/test/
bin/nutch - Script file
crawl, urls, /data/test/ - Parameters
-dir - Option
The above script should executed from a shell script named test.sh. I have the below code to execute... (2 Replies)
In a Bash script I used getopts command to let a user does something regards to the selected options. The question is: How do you find out what is the name of the file that user inserted in the command line like the following:
The good part is this file is always the last argument in the... (2 Replies)
Hi all,
I have one small requirment...
I have prepared one script. we have to pass two possitional parameters to the script. What I want to do is if the parameters are not passed then i dont want the script to start the process...
For ex:
$ ./a.sh parm1 parm2
#Here, it can start... (7 Replies)
Hi,
Can any one provide the Unix command to reset the positional parameters?
Please see the below example where i have to pass 2 parameters to Shell1.sh.
Step1) . ./Shell1.sh 2 3
successfully executed, Then i executed(next step only) the same shell script again,this time no... (4 Replies)
I need to get file names from commandline arguments, it may be any no of arguements, Using for loop i got but how do i display it, bcoz $i will give the number i is assigned $$i is not working either $($i), i need the names of the files got in the arguement (2 Replies)
Hello,
I am using the Bourne shell.
I am trying to understand the concept of positional parameters.
I do understand that positional parameters:
1. Are initialized by shell
2. Have a max of 9 parameters ($1 to $9)
3. Have no limit on the number of arguments
4. Can be rearranged... (15 Replies)
HPUX11.0/Korn Shell
I have an old script that takes in a series of arguments when its called. The script is really more of a common set of functions that gets called by other scripts as needed. I have been asked to make this into a menu driven script to rollout to app support for their use during... (2 Replies)