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1 /* push.c - push a fork into the background */
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2 #ifndef lint
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3 static char ident[] = "@(#)$Id$";
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4 #endif /* lint */
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5
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6 #include "../h/mh.h"
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7 #include <stdio.h>
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8 #include <signal.h>
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9
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10
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11 void push () {
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12 register int i;
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13
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14 for (i = 0; i < 5; i++) {
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15 switch (fork ()) {
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16 case NOTOK:
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17 sleep (5);
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18 continue;
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19
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20 case OK:
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21 (void) signal (SIGHUP, SIG_IGN);
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22 (void) signal (SIGINT, SIG_IGN);
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23 (void) signal (SIGQUIT, SIG_IGN);
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24 (void) signal (SIGTERM, SIG_IGN);
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25 #ifdef SIGTSTP
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26 (void) signal (SIGTSTP, SIG_IGN);
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27 (void) signal (SIGTTIN, SIG_IGN);
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28 (void) signal (SIGTTOU, SIG_IGN);
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29 #endif /* SIGTSTP */
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30 (void) freopen ("/dev/null", "r", stdin);
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31 (void) freopen ("/dev/null", "w", stdout);
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32 break;
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33
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34 default:
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35 done (0);
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36 }
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37 break;
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38 }
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39 if (i >= 5)
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40 advise (NULLCP, "unable to fork, so can't push...");
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41 }
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