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annotate libpwon/forkoff.c @ 820:03457a66d860

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buzplayer: add basic support for PWT
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 30 May 2021 03:39:58 +0000
parents 7d1df6d831e4
children ab54957dbe35
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1 #include <sys/types.h>
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2 #include <signal.h>
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3 #include <stdio.h>
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4 #include <stdlib.h>
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5 #include <unistd.h>
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6
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7 extern char bootctrl_pwon_cmd[];
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8 extern int bootctrl_duart28c_mode;
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9
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10 static char shell_pathname[] = "/bin/sh";
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11
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12 void
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13 fork_exec_pwon_cmd()
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14 {
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15 int i;
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16
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17 i = vfork();
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18 if (i < 0) {
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19 perror("vfork");
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20 exit(1);
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21 }
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22 if (i)
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23 return;
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24 execl(shell_pathname, "sh", "-c", bootctrl_pwon_cmd, (char *) 0);
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25 perror(shell_pathname);
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26 _exit(1);
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27 }
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28
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29 pwon_if_needed()
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30 {
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31 if (bootctrl_duart28c_mode) {
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32 signal(SIGCHLD, SIG_IGN);
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33 fork_duart28c_pulse();
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34 return(1);
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35 }
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36 if (bootctrl_pwon_cmd[0]) {
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37 signal(SIGCHLD, SIG_IGN);
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38 fork_exec_pwon_cmd();
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39 return(1);
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40 }
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41 return(0);
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42 }