FreeCalypso > hg > freecalypso-tools

annotate libpwon/forkoff.c @ 582:deda54106c0e

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doc/Target-boot-control: first draft
author Mychaela Falconia <falcon@freecalypso.org>
date Mon, 03 Feb 2020 01:25:31 +0000
parents cef70d53fc5e
children 7d1df6d831e4
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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
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9 static char shell_pathname[] = "/bin/sh";
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10
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11 void
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12 fork_exec_pwon_cmd()
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13 {
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14 int i;
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15
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16 i = vfork();
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17 if (i < 0) {
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18 perror("vfork");
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19 exit(1);
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20 }
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21 if (i)
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22 return;
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23 execl(shell_pathname, "sh", "-c", bootctrl_pwon_cmd, (char *) 0);
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24 perror(shell_pathname);
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25 _exit(1);
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26 }
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27
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28 pwon_if_needed()
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29 {
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30 if (!bootctrl_pwon_cmd[0])
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31 return(0);
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32 signal(SIGCHLD, SIG_IGN);
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33 fork_exec_pwon_cmd();
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34 return(1);
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35 }