Added a kind-of-working openpty()

include/sys/fs/pty.h

@@ -0,0 +1,24 @@
+#pragma once
+#include "sys/fs/node.h"
+#include "sys/ring.h"
+#include "sys/chr.h"
+
+struct pty {
+    int number;
+    vnode_t *master;
+    vnode_t *slave;
+    // TODO: winsize/termios
+
+    struct chrdev dev_master;
+    struct chrdev dev_slave;
+
+    // Slave reads
+    // Master writes
+    struct ring ring_input;
+    // Slave writes
+    // Master reads
+    struct ring ring_output;
+    int owner_pid;
+};
+
+struct pty *pty_create(void);

include/sys/syscall.h

@@ -18,4 +18,6 @@
 #define SYSCALL_NR_EXIT         60
 #define SYSCALL_NR_KILL         62
 #define SYSCALL_NR_GETTIMEOFDAY 96
+
+#define SYSCALL_NRX_OPENPTY     118
 #define SYSCALL_NRX_SIGRET      119