feat(tty): clear read buf in default sig. handlers

include/kernel/tty.hpp

@@ -18,6 +18,8 @@ public:
     void print(const char* str);
     size_t read(char* buf, size_t buf_size, size_t n);
 
+    void clear_read_buf(void);
+
     constexpr void set_pgrp(pid_t pgid)
     {
         fg_pgroup = pgid;

include/types/buffer.hpp

@@ -144,6 +144,12 @@ public:
     {
         return end - start + 1 - count;
     }
+
+    constexpr void clear(void)
+    {
+        count = 0;
+        head = base;
+    }
 };
 
 } // namespace types

src/kernel/process.cpp

@@ -452,8 +452,11 @@ void check_signal()
     switch (current_process->signals.pop()) {
     case kernel::SIGINT:
     case kernel::SIGQUIT:
-    case kernel::SIGPIPE:
     case kernel::SIGSTOP:
+        procs->get_ctrl_tty(current_process->pid)->clear_read_buf();
+        kill_current(-1);
+        break;
+    case kernel::SIGPIPE:
         kill_current(-1);
         break;
     case 0:

src/kernel/tty.cpp

@@ -142,3 +142,8 @@ void serial_tty::recvchar(char c)
         break;
     }
 }
+
+void tty::clear_read_buf(void)
+{
+    this->buf.clear();
+}