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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shell(1F) FMLI Commands shell(1F)
NAME
shell - run a command using shell
SYNOPSIS
shell command [command] ...
DESCRIPTION
The shell function concatenate its arguments, separating each by a space, and passes this string to the shell ($SHELL if set, otherwise
/usr/bin/sh).
EXAMPLES
Example 1: A sample output of shell command.
Since the Form and Menu Language does not directly support background processing, the shell function can be used instead.
`shell "build prog > /dev/null &"`
If you want the user to continue to be able to interact with the application while the background job is running, the output of an exe-
cutable run by shell in the background must be redirected: to a file if you want to save the output, or to /dev/null if you don't want to
save it (or if there is no output), otherwise your application may appear to be hung until the background job finishes processing.
shell can also be used to execute a command that has the same name as an FMLI built-in function.
NOTES
The arguments to shell will be concatenate using spaces, which may or may not do what is expected. The variables set in local environments
will not be expanded by the shell because "local" means "local to the current process."
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWcsu |
+-----------------------------+-----------------------------+
SEE ALSO
sh(1), attributes(5)
SunOS 5.10 5 Jul 1990 shell(1F)