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38 lines
680 B
C
38 lines
680 B
C
/* Program to produce output at regular intervals. */
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#include <stdio.h>
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#include <time.h>
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#include <sys/time.h>
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struct tm *localtime ();
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main (argc, argv)
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int argc;
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char **argv;
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{
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int period = 60;
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time_t when;
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struct tm *tp;
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if (argc > 1)
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period = atoi (argv[1]);
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while (1)
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{
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/* Make sure wakeup stops when Emacs goes away. */
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if (getppid () == 1)
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exit (0);
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printf ("Wake up!\n");
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fflush (stdout);
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/* If using a period of 60, produce the output when the minute
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changes. */
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if (period == 60)
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{
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time (&when);
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tp = localtime (&when);
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sleep (60 - tp->tm_sec);
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}
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else
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sleep (period);
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}
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}
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