sys/src/cmd/vt/event.c

   1 #include <u.h>
   2 #include <libc.h>
   3 #include <draw.h>
   4 #include <event.h>
   5 #include "cons.h"
   6
   7 #define BUFSIZ  4000
   8
   9 extern int      outfd;
  10
  11 int     hostpid;
  12
  13 void
  14 edie(void)
  15 {
  16         static int dead = 0;
  17
  18         if(dead++ > 0) return;
  19         close(outfd);
  20         postnote(PNGROUP, getpid(), "exit");
  21 }
  22
  23 static int
  24 start_host(void)
  25 {
  26         int     fd;
  27
  28         cs = consctl();
  29
  30         switch((hostpid = rfork(RFPROC|RFNAMEG|RFFDG|RFNOTEG))) {
  31         case 0:
  32                 fd = open("/dev/cons", OREAD);
  33                 dup(fd,0);
  34                 if(fd != 0)
  35                         close(fd);
  36                 fd = open("/dev/cons", OWRITE);
  37                 dup(fd,1);
  38                 dup(fd,2);
  39                 if(fd != 1 && fd !=2)
  40                         close(fd);
  41                 execl("/bin/rc","rcX",nil);
  42                 fprint(2,"failed to start up rc\n");
  43                 _exits("rc");
  44         case -1:
  45                 fprint(2,"rc startup: fork error\n");
  46                 _exits("rc_fork");
  47         }
  48
  49         return open("/mnt/cons/data", ORDWR);
  50 }
  51
  52 void
  53 ebegin(int Ehost)
  54 {
  55
  56         atexit(edie);
  57
  58         einit(Emouse|Ekeyboard);
  59
  60         outfd = start_host();
  61         if( estart(Ehost, outfd, BUFSIZ) != Ehost) {
  62                 exits("event init error");
  63         }
  64 }
  65
  66 void
  67 send_interrupt(void)
  68 {
  69         postnote(PNGROUP, hostpid,"interrupt");
  70 }