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1 /* Program to produce output at regular intervals. */
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2
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3 #include <../src/config.h>
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4
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5 #if __STDC__ || defined(STDC_HEADERS)
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6 #include <stdlib.h>
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7 #include <unistd.h>
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8 #endif
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9
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10 #include <stdio.h>
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11 #include <sys/types.h>
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12
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13 #ifdef TIME_WITH_SYS_TIME
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14 #include <sys/time.h>
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15 #include <time.h>
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16 #else
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17 #ifdef HAVE_SYS_TIME_H
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18 #include <sys/time.h>
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19 #else
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20 #include <time.h>
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21 #endif
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22 #endif
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23
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24 struct tm *localtime ();
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25
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26 void
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27 main (argc, argv)
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28 int argc;
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29 char **argv;
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30 {
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31 int period = 60;
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32 time_t when;
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33 struct tm *tp;
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34
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35 if (argc > 1)
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36 period = atoi (argv[1]);
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37
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38 while (1)
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39 {
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40 /* Make sure wakeup stops when Emacs goes away. */
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41 if (getppid () == 1)
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42 exit (0);
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43 printf ("Wake up!\n");
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44 fflush (stdout);
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45 /* If using a period of 60, produce the output when the minute
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46 changes. */
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47 if (period == 60)
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48 {
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49 time (&when);
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50 tp = localtime (&when);
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51 sleep (60 - tp->tm_sec);
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52 }
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53 else
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54 sleep (period);
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55 }
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56 }
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