Question

I know that the function:

system("myfile.sh")

exec a bash script.
Ok but now I want to redirect the output to my program to ensure the reading.
For example the script date.sh give me the date of my system, and i want to see it on my program with std::cout << OUTPUTDATE;
Is it possible?
How?

Answer 1

Use popen instead of system.

The function popen will give you a FILE * you can read from.

FILE *script = popen("myfile.sh", "r");
while (fgets(line, LENGTH, script)) {
    /* ... */
}
pclose(script);