From c8b55b3fd4924abcdf919458b0d8adb0ec00b0f2 Mon Sep 17 00:00:00 2001
From: dzwdz
Date: Tue, 26 Jul 2022 23:23:50 +0200
Subject: user: break out the shell and tests into separate binaries

---
 src/user/app/init/init.c | 66 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 66 insertions(+)
 create mode 100644 src/user/app/init/init.c

(limited to 'src/user/app/init/init.c')

diff --git a/src/user/app/init/init.c b/src/user/app/init/init.c
new file mode 100644
index 0000000..0e90d1f
--- /dev/null
+++ b/src/user/app/init/init.c
@@ -0,0 +1,66 @@
+#include "driver/driver.h"
+#include <camellia/flags.h>
+#include <camellia/syscalls.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <user/lib/fs/misc.h>
+
+int main(void) {
+	freopen("/kdev/com1", "a+", stdout);
+	printf("in init (stage 2), main at 0x%x\n", &main);
+
+	MOUNT("/tmp/", tmpfs_drv());
+	MOUNT("/keyboard", ps2_drv());
+	MOUNT("/vga_tty", ansiterm_drv());
+	MOUNT("/bin/", fs_passthru("/init/bin"));
+
+	if (fork()) {
+		/* (used to) expose a bug in the kernel
+		 * the program will flow like this:
+		 * 1. we launch the forked init
+		 * 2. the forked init launches both shells
+		 * 3. one of the shells quit
+		 * 4. the forked init picks it up and quits
+		 *
+		 * then, in process_kill, the other shell will be deathbedded
+		 *
+		 * before i implement(ed) reparenting, it was a lingering running child
+		 * of a dead process, which is invalid state
+		 */
+		_syscall_await();
+		exit(1);
+	}
+
+	if (!fork()) {
+		if (!freopen("/kdev/com1", "a+", stdout)) {
+			printf("couldn't open /kdev/com1\n"); // TODO borked
+			exit(1);
+		}
+		if (!freopen("/kdev/com1", "r", stdin)) {
+			printf("couldn't open /kdev/com1\n");
+			exit(1);
+		}
+		termcook();
+		execv("/bin/shell", NULL);
+		exit(1);
+	}
+
+	if (!fork()) {
+		if (!freopen("/vga_tty", "a+", stdout)) {
+			printf("couldn't open /vga_tty\n"); // TODO borked
+			exit(1);
+		}
+		if (!freopen("/keyboard", "r", stdin)) {
+			printf("couldn't open /keyboard\n");
+			exit(1);
+		}
+		termcook();
+		execv("/bin/shell", NULL);
+		exit(1);
+	}
+
+	_syscall_await();
+	printf("init: quitting\n");
+	return 0;
+}
-- 
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