Shell Programming and Scripting

I need some herlp with the following requirements for a script:

Write a single script file that accomplishes the following tasks:
1. If invoked without any parameters it must echo a Usage message.
2. For every parameter in the script call, determine:
a. If the parameter is a file calculate the number of lines in that file and store the result in a file called ‘file.result'.
b. If the parameter is a directory, calculate the number of files in that directory (hint: use ‘ls -1') and store the result in ‘directory.result'.
c. Both of these files must contain all of the results for all parameters, i.e., you cannot just keep the last file or directory information.
d. If the parameter is neither a file nor a directory, print an error message indicating the parameter is not readable/searchable.
e. If all parameters were successfully processed the script must exit with a status of 0.
f. Any problems with any parameters - the script should exit with a status of 99.
g. The files ‘file.result' and ‘directory.result' should be written in the shell script user's home directory (not the current directory).
h. Under no circumstances should the files ‘file.result' and ‘directory.result' be completely overwritten. All shell executions must add to those files, never overwrite them.
i. If a directory or file is used as a parameter and it is not accessible an error message must print and the parameter skipped as a result.
j. The report files (file.result and directory.result) should contain the executing user's id as part of the result.
k. Any temporary files you create should be stored in the /tmp directory and deleted upon shell exit.
3. In terms of the shell script itself, you must document (by a series of comments) what the shell script does and who wrote it (the author - you). Therefore, your name must be in the shell script itself.
4. no syntax errors or warnings should appear when executed.
5. The amount of partial credit will be based on how much the shell script accomplishes according to the above rules.
6. Not turning in anything results in a grade of “0”.
7. The shell script must be written in either ‘bash' or ‘ksh' only. No other scripting languages will be accepted for this assignment.
8. You may use any auxiliary utilities you deem necessary inside the shell script to accomplish the action according to the above rules. Everything must be self-contained in the single shell script.
9. Use the ‘echo' command to print messages out of the shell script rather than the sometimes builtin ‘print' command.
10. The shell is not designed to be interactive; do not ask the user for any information.
11. Make sure the permissions on your shell are private to the owner and no other permissions are set.
1. in the reports, along with the user name, put the date and time of the request for that user.
NOTE: This is for school - but I need help with this - I am at a loss.. VERY NEW to linux and want to see how this is done.....

thanks

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