refactor: restructure the user space stuff.

[lunaix-os.git] / lunaix-os / usr / init / init.c

diff --git a/lunaix-os/usr/init/init.c b/lunaix-os/usr/init/init.c
new file mode 100644 (file)
index 0000000..7e1785a
--- /dev/null
+++ b/lunaix-os/usr/init/init.c
@@ -0,0 +1,39 @@
+#include <errno.h>
+#include <fcntl.h>
+#include <lunaix/lunaix.h>
+#include <stdio.h>
+#include <unistd.h>
+
+int
+main(int argc, const char** argv)
+{
+    int err = 0;
+
+    if ((err = open("/dev/tty", 0)) < 0) {
+        syslog(2, "fail to open tty (%d)\n", errno);
+        return 0;
+    }
+
+    if ((err = dup(err)) < 0) {
+        syslog(2, "fail to setup tty i/o (%d)\n", errno);
+        return 0;
+    }
+
+    printf("(%p) user space!\n", (void*)main);
+
+    if ((err = symlink("/usr", "/mnt/lunaix-os/usr"))) {
+        syslog(2, "symlink /usr:/mnt/lunaix-os/usr (%d)\n", errno);
+        return 0;
+    }
+
+    pid_t pid;
+    if (!(pid = fork())) {
+        err = execve("/usr/sh", NULL, NULL);
+        printf("fail to execute (%d)\n", errno);
+        _exit(err);
+    }
+
+    waitpid(pid, NULL, 0);
+
+    return 0;
+}
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