topic Re: bash shell error checking in Operating System - Linux

bash shell error checking

Daniel K — Sun, 08 Jun 2003 00:21:33 GMT

hey there everyone
ive been working on this code (on unix) which reads a text file(which has student user names and marks etc), then i output real names, and total marks, averages etc
my problem is error checking tho
my arguments are
report.sh -e marks.txt
(which prints output, and count of grades and averages)
report.sh -s marks.txt
(which just prints the output)

i need error messages for the following cases
*where the data file does not exist
*an incorrect command switch is used
*a command switch is not provided
*a data file is not provided

can someone help me here, i will send u my source code,
the textfile is like this:

*i had some smaller problems, my averages and counts of grades seem to count cumulatively, how to i get it to print just the final counts, or the last average?
*i also needed to sort the output from largest to smallest total marks (without using a temp file) how can this be done?
hope im not too much bother, can someone please look at this and help within the 24 hours, im under a strict deadline and im startin to panic, thanks everyone
hope ya's can help

Re: bash shell error checking

Daniel K — Sun, 08 Jun 2003 00:23:38 GMT

oh and here is the marks.txt file

it is based on usernames and student numbers on my unix system

but they all work, so its irrelevant to what i need

Re: bash shell error checking

Jordan Bean — Sun, 08 Jun 2003 04:29:35 GMT

Okay, give me a few days to squeeze this in and I'll even optimize it for you.

Re: bash shell error checking

Daniel K — Sun, 08 Jun 2003 04:35:08 GMT

A few days?
:(

id hate to be a bother, but i need this done in less then 24 hours

could u just work out how to do the sorting and error checking

and if u have time the other things?

please that would be great

thanks

Re: bash shell error checking

Daniel K — Sun, 08 Jun 2003 04:36:20 GMT

Re: bash shell error checking

Daniel K — Sun, 08 Jun 2003 04:38:19 GMT

A few days?
:(

id hate to be a bother, but i need this done in less then 24 hours
badly......
could u just work out how to do the sorting and error checking

and if u have time the other things?

please that would be great

thanks

Re: bash shell error checking

Daniel K — Sun, 08 Jun 2003 04:52:56 GMT

sorry my comp screwed up, i didnt realised it sent my msg 3 times....

but yeh, i have exactly 18 hours to finish this thing (damn deadlines)

r u able to do any of it by then?

i hope u can

i wont be able to thank u enough if u do
get back to me ASAP

Re: bash shell error checking

Jordan Bean — Mon, 09 Jun 2003 00:54:37 GMT

I'll try to get this to you before I go to sleep tonight. I'm currently hung-up on some bash array processing. I'd send you what I've whipped up so far, but I've lost connectivity to my work environments.

Re: bash shell error checking

Jordan Bean — Mon, 09 Jun 2003 05:16:52 GMT

This is what I have so far.

Unfortunately, the grade counters are not incrementing and I haven't even touched the averaging and sorting logic.

Re: bash shell error checking

Jordan Bean — Mon, 09 Jun 2003 23:02:48 GMT

I'm really sorry about the delay.

Revision 2 is attached. 50% rewritten.

Grade counts and overall average included. Still not sure how to sort the grades yet.

For whatever reason the grades array would not propogate to the get_grade function. So instead of trying to get this function to increment each grade element, I decided to have the parent FOR loop increment the elements using the return code of the function as the index.

I'm sure you'll have a lot of questions about what is what and how it works. So do ask.