Question

Hi I’ve a question about feeding inputs to this simple bash script I wrote. All it does is add a set of flags to my compile operation to save me having to write them in myself every time. I can run it by using echo myprogram.c -o myprogram -llibrary | ./Compile.
But I can’t find a way to run it in the way I expected to be able to, ./Compile < myprogram.c -o myprogram -llibrary
I’ve tried a few combinations of quotes and brackets to no avail, can anyone tell me how to feed the same input as produced by echo using the redirect input command.

#!/bin/bash
# File name Compile
#Shortcut to compile with all the required flags, name defaulting to
#first input ending in .c
echo "Enter inputs: "
read inputs
gcc -Wall -W -pedantic -std=c89 -g -O $inputs
exit 0

Answer 1

Just change your shell to:

#!/bin/bash
gcc -Wall -W -pedantic -std=c89 -g -O "$@"

Then you can only write(no redirection needed):

./Compile myprogram.c -o myprogram -llibrary

BTW, don’t explicitly write exit 0 at end of this shell. It is redundant when gcc succeeds, and is wrong when gcc fails(exit code 1 will be overwritten).