xv6-65oo2/init.c

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#include "user.h"
#include "types.h"
#include "fs.h"
#include "fcntl.h"
char *sh_args[] = { "sh", 0 };
int
main(void)
{
int pid;
if(open("console", 0) < 0){
mknod("console", T_DEV, 1, 1);
open("console", 0);
}
open("console", 1);
open("console", 1);
puts("init...\n");
while(1){
puts("running sh...\n");
pid = fork();
if(pid == 0){
exec("sh", sh_args);
exit();
}
if(pid > 0)
wait();
}
}