CODEWITHSUNDEEP
cbeep
rkg125
rkg125

Reputation: 71

How to write a C program that makes a bell sound many time in succession?

I have a C program , running on a Linux system, that can take up to a hour to complete. I need to monitor it's behavior at various times, from other processes, for example perf. The program prints out various diagnostics so if I watch it I'll know exactly when to run my observability tools.

But I don't want to spend time watching the program waiting for it to get to the proper places where I need to take action, since I have other things to do. So it seemed like a solution to my problem was to have the program make sounds when it gets to places where I need to take action. Having it ring the bell would do the job. However I could very easily miss a single ring of the bell, so I would like to make the bell ring 30 or 40 times in succession.

The problem is that if I write the following loop:

for ( i=0; i<40; i++)
   {
      printf("\a");
   }

the bell only rings once. Even if I manually inline the printf()s, and insert statements between each one, the bell still only rings once.

Maybe the optimizer optimizes away the additional beeps; I didn't check the generated assembly to see if this is the case. But this is doubtful, because if I change the printf()s to

printf("----------------------- \a \n");

I get as many lines of dashes, as I ask for, but still only one bell beep.

So, is there a way to get 40 beeps in succession?

Upvotes: 1

Views: 112

Answers (0)

Related Questions