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37 lines
671 B
C
37 lines
671 B
C
#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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/* This flag controls termination of the main loop. */
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volatile sig_atomic_t keep_going = 1;
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/* The signal handler just clears the flag and re-enables itself. */
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void
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catch_alarm (int sig)
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{
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keep_going = 0;
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signal (sig, catch_alarm);
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}
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void
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do_stuff (void)
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{
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puts ("Doing stuff while waiting for alarm....");
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}
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int
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main (void)
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{
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/* Establish a handler for SIGALRM signals. */
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signal (SIGALRM, catch_alarm);
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/* Set an alarm to go off in a little while. */
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alarm (2);
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/* Check the flag once in a while to see when to quit. */
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while (keep_going)
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do_stuff ();
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return EXIT_SUCCESS;
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}
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