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Reading a file passed as an argurement and assessing the files syntax

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# 1  
Old 05-04-2017
Reading a file passed as an argurement and assessing the files syntax
I am trying to write a shell script which takes an input file as an arguement in the terminal e.g. bash shellscriptname.sh input.txt. I would like for the file to be read line by line each time checking if the .txt file contains certain words or letters(validating the syntax). If the line being read follows the syntax then it should be sent to another file called correct.txt if the syntax is incorrect of the line then it should be sent to incorrect.txt. I have been struggling to get the shell script to read the file and then assess the syntax. Please could someone help
# 2  
Old 05-04-2017
Without seeing your script it will be difficult...
What kind of syntax is it trying to check? your own rules?
# 3  
Old 05-04-2017
Quote:
Originally Posted by vbe
Without seeing your script it will be difficult...
What kind of syntax is it trying to check? your own rules?
They are rules I have been given as requirements for example, line 1 in the txt file is add $s0 $s1 $s2. The shell script is then supposed to view the line of text and run a check to see if there is an add or sub in the line of text, if there is does it have 3 arguments after it.

---------- Post updated at 10:25 AM ---------- Previous update was at 10:19 AM ----------

Quote:
Originally Posted by vbe
Without seeing your script it will be difficult...
What kind of syntax is it trying to check? your own rules?
Is it possible for you to email me, so I can send you some more information? gurdza_pol@hotmail.com
# 4  
Old 05-04-2017
Hello!

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# 5  
Old 05-04-2017
Sorry I am new to the site and was not aware of the rules
# 6  
Old 05-04-2017
Please become accustomed to provide decent context info of your problem.
It is always helpful to support a request with system info like OS and shell, related environment (variables, options), preferred tools, and adequate (representative) sample input and desired output data and the logics connecting the two, to avoid ambiguities and keep people from guessing.

Open questions: input file format, how do you convey the rules, ans preferred tools?

And, is that homework or classwork?
# 7  
Old 05-04-2017
Quote:
Originally Posted by RudiC
Please become accustomed to provide decent context info of your problem.
It is always helpful to support a request with system info like OS and shell, related environment (variables, options), preferred tools, and adequate (representative) sample input and desired output data and the logics connecting the two, to avoid ambiguities and keep people from guessing.

Open questions: input file format, how do you convey the rules, ans preferred tools?

And, is that homework or classwork?
I am writing the shell on notepad called valsplit.sh, when running the script in the ubuntu terminal I am required to supply 3 arguments a .txt file to read information from and 2 more .txt files to send information to. The file to be read is called input.txt it contains lines of text similar to an example I provided above. They are to be read and validated one line at a time. First we are to check if at the start of the line there is the word "add", "sub", "addi", "lw" or "sw". If that passes the test next is to check if the "add" or "sub" has 3 arguments after it containing either a t or an s, they must also have a $ before it. If the command addi is used one of the arguements must be within a certain number range. If they pass the checks they should be sent to the correct.txt file which is the second argument when running the script in the terminal. If they do not pass the checks the line must be to the third argument in the terminal which is the incorrect.txt file and a message should be output to the terminal stating the error.

This is a practice task for revision I am having trouble with setting up the shell script in notepad, creating a while loop to read each line of the input.txt file and the if statements to check the syntax also I am having trouble using the terminal.
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