Question

CSCE 3600: Systems Programming

Recitation Assignment 4 – Bash script

Due: 06:00 PM on Monday October 12 2020

DESCRIPTION: You need to write a bash script to compile and execute a C program. Please feel free to ask for assistance from your TA or fellow classmates, but make sure that you turn in your own work. Please note that you are writing bash scripts, not C programs, for this exercise.

1. Write a bash script that accepts a C file name as a command-line argument. If the user does not enter a command-line argument when invoking this shell script, you will simply output: "No file provided to run!"
2. If the file compiles successfully, the script should run the executable file, otherwise the script should output “Compilation error/s, please, check output for issues”.
3. Before compilation, your script should check if an executable file already created and if it is and date/time stamp of it is greater than date/time stamp of the input C file, the script should not recompile the C file and just run the executable.
4. You should test your script on your Recitation 1 assignment C program.

SAMPLE OUTPUT:

$ ./rec04.sh HelloWorld.c

… Output of a compiler

Hello World!

$ ./rec04.sh HelloWorld.c

Hello World!

$ ./rec04.sh

No file provided to run!

REQUIREMENTS:

• Your bash scripts will be graded based largely on whether they work correctly on the CSE machines
• Although this assignment is to be submitted individually (i.e., each student will submit his/her own source code). Please remember that you are ultimately responsible for learning and comprehending this material as the recitation assignments are given in preparation for the minor assignments, which must be completed individually.

SUBMISSION: • You will electronically submit your “FirstName_LastName_05.sh” program file to the Recitation 4 Assignment in Canvas by the due date and time.

Answer 1

#!/bin/bash

if [ $# -ne 1 ]
then
   echo "No file provided to run!"
elif [ ! -f $1 ]
then
   echo "There is no $1 file found , check name"
else
   gcc $1
   ./a.out
fi

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