From bf8704b63d6df9ddfd5b0aa468dfa5404ea40f6f Mon Sep 17 00:00:00 2001
From: Alan Cox <alan@linux.intel.com>
Date: Sat, 26 Dec 2015 23:34:35 +0000
Subject: [PATCH] tty: first cut at SIGWINCH and friends

Actually looks small enough that this would make sense for level 1.
---
 Kernel/include/tty.h | 17 +++++++++++++++++
 Kernel/tty.c         | 13 +++++++++++--
 2 files changed, 28 insertions(+), 2 deletions(-)

diff --git a/Kernel/include/tty.h b/Kernel/include/tty.h
index 7233fadf..8e506d9b 100644
--- a/Kernel/include/tty.h
+++ b/Kernel/include/tty.h
@@ -145,11 +145,24 @@ struct termios {
 #define KBSETTRANS	0x23
 #define VTATTRS		0x24
 
+/* Fuzix systems to level 2 have 256 byte tty buffers as per standards, level 1
+   boxes may not */
+#if defined(CONFIG_LEVEL_2)
+#define TTYSIZ 256
+#endif
+
 /* Character Input Queue size */
 #if !defined TTYSIZ
 #define TTYSIZ 132
 #endif
 
+struct winsize {
+    unsigned short ws_row;
+    unsigned short ws_col;
+    unsigned short ws_xpixel;
+    unsigned short ws_ypixel;
+};
+
 /* Group the tty into a single object. That lets 8bit processors keep all
    the data indexed off a single register */
 struct tty {
@@ -163,6 +176,10 @@ struct tty {
 #define TTYF_DEAD	4
     uint16_t pgrp;
     struct termios termios;
+    /* TODO: For now lets work on the basis winsz is level 2 */
+#ifdef CONFIG_LEVEL_2
+    struct winsize winsize;
+#endif
 };
 
 #define CTRL(x)		((x)&0x1F)
diff --git a/Kernel/tty.c b/Kernel/tty.c
index 258dc437..f0ce55dc 100644
--- a/Kernel/tty.c
+++ b/Kernel/tty.c
@@ -231,7 +231,7 @@ int tty_ioctl(uint8_t minor, uarg_t request, char *data)
         }
 	switch (request) {
 	case TCGETS:
-		return uput(&ttydata[minor].termios, data, sizeof(struct termios));
+		return uput(&t->termios, data, sizeof(struct termios));
 		break;
 	case TCSETSF:
 		clrq(&ttyinq[minor]);
@@ -240,7 +240,7 @@ int tty_ioctl(uint8_t minor, uarg_t request, char *data)
 		/* We don't have an output queue really so for now drop
 		   through */
 	case TCSETS:
-		if (uget(data, &ttydata[minor].termios, sizeof(struct termios)) == -1)
+		if (uget(data, &t->termios, sizeof(struct termios)) == -1)
 		        return -1;
                 tty_setup(minor);
 		break;
@@ -258,6 +258,15 @@ int tty_ioctl(uint8_t minor, uarg_t request, char *data)
 	case TIOCOSTART:
 		t->flag &= ~TTYF_STOP;
 		break;
+#ifdef CONFIG_LEVEL_2
+        case TIOCGWINSZ:
+                return uput(&t->winsize, data, sizeof(struct winsize));
+        case TIOCSWINSZ:
+                if (uget(&t->winsize, data, sizeof(struct winsize)))
+                        return -1;
+                sgrpsig(t->pgrp, SIGWINCH);
+                return 0;
+#endif
 	default:
 		udata.u_error = ENOTTY;
 		return (-1);
-- 
2.34.1