init creates console, opens 0/1/2, runs sh

sh accepts 0-argument commands (like userfs)
reads from console

1 files changed, 32 insertions, 0 deletions

diff --git a/init.c b/init.c
new file mode 100644
index 0000000..dcd0fda
--- /dev/null
+++ b/init.c
@@ -0,0 +1,32 @@
+#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);
+
+  write(1, "init...\n", 8);
+
+  while(1){
+    write(1, "running sh...\n", 14);
+    pid = fork();
+    if(pid == 0){
+      exec("sh", sh_args);
+      exit();
+    }
+    if(pid > 0)
+      wait();
+  }
+}