From 27cf4b1923629cbf71609311d004914c2508c03a Mon Sep 17 00:00:00 2001
From: dzwdz
Date: Sat, 18 Sep 2021 12:15:58 +0200
Subject: `init`: implement a working tar driver

---
 src/init/main.c | 75 ++++++++++++++++++++-------------------------------------
 1 file changed, 26 insertions(+), 49 deletions(-)

(limited to 'src/init/main.c')

diff --git a/src/init/main.c b/src/init/main.c
index aef6410..c81f789 100644
--- a/src/init/main.c
+++ b/src/init/main.c
@@ -12,8 +12,8 @@ extern char _initrd;
 
 int tty_fd;
 
+void read_file(const char *path, size_t len);
 void fs_test(void);
-void fs_server(handle_t back);
 
 __attribute__((section(".text.startup")))
 int main(void) {
@@ -25,66 +25,43 @@ int main(void) {
 		_syscall_exit(argify("couldn't open tty"));
 
 	fs_test();
-	tar_driver(&_initrd);
 
 	_syscall_exit(argify("my job here is done."));
 }
 
-void fs_test(void) {
-	handle_t front, back, file;
-	front = _syscall_fs_create(&back);
+void read_file(const char *path, size_t len) {
+	int fd = _syscall_open(path, len);
+	static char buf[64];
+	int buf_len = 64;
 
-	if (_syscall_fork()) {
-		// child: is the fs server
-		fs_server(back);
+	_syscall_write(tty_fd, path, len);
+	log(": ");
+	if (fd < 0) {
+		log("couldn't open.\n");
 		return;
 	}
 
-	// parent: accesses the fs
-	_syscall_mount(front, argify("/mnt"));
-	log("requesting file. ");
-	file = _syscall_open(argify("/mnt/tty"));
-	log("open returned. ");
-	_syscall_write(file, argify("hello"));
+	buf_len = _syscall_read(fd, buf, buf_len);
+	_syscall_write(tty_fd, buf, buf_len);
 
-	// try reading
-	char buf[8];
-	int len = 8;
-	for (int i = 0; i < 8; i++)
-		buf[i] = '.';
-	len = _syscall_read(file, buf, len);
-	_syscall_write(tty_fd, buf, len + 1); // read 1 byte past, should be a dot
+	_syscall_close(fd);
 }
 
-void fs_server(handle_t back) {
-	static char buf[64];
-	int len, id;
-	for (;;) {
-		len = 64;
-		switch (_syscall_fs_wait(back, buf, &len, &id)) {
-			case VFSOP_OPEN:
-				_syscall_write(tty_fd, buf, len);
-				log(" was opened. ");
-				_syscall_fs_respond(NULL, 32); // doesn't check the path yet
-				break;
-
-			case VFSOP_READ:
-				// all reads output "world"
-				_syscall_fs_respond("world", 5);
-				break;
-
-			case VFSOP_WRITE:
-				// uppercase the buffer
-				for (int i = 0; i < len; i++) buf[i] &= ~id; // id == 32
-				// and passthrough to tty
-				_syscall_write(tty_fd, buf, len);
-				_syscall_fs_respond(NULL, len); // return the amt of bytes written
-				break;
+void fs_test(void) {
+	handle_t front, back, file;
+	front = _syscall_fs_create(&back);
 
-			default:
-				log("fuck");
-				break;
-		}
+	if (_syscall_fork()) {
+		// child: is the fs server
+		tar_driver(back, &_initrd);
+		return;
 	}
 
+	// parent: accesses the fs
+	log("\n");
+	_syscall_mount(front, argify("/init"));
+	read_file(argify("/init/fake.txt"));
+	read_file(argify("/init/1.txt"));
+	read_file(argify("/init/2.txt"));
+	read_file(argify("/init/dir/3.txt"));
 }
-- 
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