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428
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1 /* Program to produce output at regular intervals. */
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2
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438
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3 #include <config.h>
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428
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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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442
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7 #ifdef HAVE_UNISTD_H
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428
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8 #include <unistd.h>
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9 #endif
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442
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10 #endif
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428
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11
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12 #include <stdio.h>
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13 #include <sys/types.h>
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14
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442
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15 #ifdef WIN32_NATIVE
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428
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16 #define WIN32_LEAN_AND_MEAN
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17 #include <windows.h>
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18 #undef sleep
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19 #define sleep(t) Sleep ((t) * 1000)
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20 #define getppid() (0)
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21 #undef HAVE_SYS_TIME_H
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442
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22 #endif /* WIN32_NATIVE */
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428
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23
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24 #ifdef TIME_WITH_SYS_TIME
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25 #include <sys/time.h>
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26 #include <time.h>
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27 #else
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28 #ifdef HAVE_SYS_TIME_H
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29 #include <sys/time.h>
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30 #else
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31 #include <time.h>
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32 #endif
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33 #endif
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34
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35 int
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36 main (int argc, char *argv[])
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37 {
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38 int period = 60;
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39
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40 if (argc > 1)
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41 period = atoi (argv[1]);
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42
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43 while (1)
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44 {
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45 /* Make sure wakeup stops when Emacs goes away. */
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46 if (getppid () == 1)
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47 return 0;
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48 printf ("Wake up!\n");
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49 /* If fflush fails, then our stdout pipe is broken. */
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50 if (fflush (stdout) != 0)
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51 return 0;
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52 /* If using a period of 60, produce the output when the minute
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53 changes. */
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54 if (period == 60)
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55 {
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56 time_t when;
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57 struct tm *tp;
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58 time (&when);
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59 tp = localtime (&when);
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60 sleep (60 - tp->tm_sec);
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61 }
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62 else
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63 sleep (period);
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64 }
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65 }
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