From 81cf0f729e3b7ad777e144843da29a787854b666 Mon Sep 17 00:00:00 2001
From: "K. Lange" <klange@toaruos.org>
Date: Fri, 17 Feb 2023 09:00:22 +0900
Subject: [PATCH] tty: support IUCLC since we support OLCUC

---
 apps/stty.c      | 2 ++
 kernel/vfs/tty.c | 4 ++++
 2 files changed, 6 insertions(+)

diff --git a/apps/stty.c b/apps/stty.c
index 051faa02..ee53ae46 100644
--- a/apps/stty.c
+++ b/apps/stty.c
@@ -170,6 +170,7 @@ static int show_settings(int all) {
 	print_iflag("ixany",  IXANY,  0);
 	print_iflag("ixoff",  IXOFF,  0);
 	print_iflag("ixon",   IXON,   0);
+	print_iflag("iuclc",  IUCLC,  0);
 	print_iflag("parmrk", PARMRK, 0);
 	if (printed) { fprintf(stdout, "\n"); printed = 0; }
 
@@ -323,6 +324,7 @@ int main(int argc, char * argv[]) {
 		set_iflag("ixon",   IXON);
 		set_iflag("ixany",  IXANY);
 		set_iflag("ixoff",  IXOFF);
+		set_iflag("iuclc",  IUCLC);
 
 		set_oflag("olcuc",  OLCUC);
 		set_oflag("opost",  OPOST);
diff --git a/kernel/vfs/tty.c b/kernel/vfs/tty.c
index 77f03b8e..4fc03572 100644
--- a/kernel/vfs/tty.c
+++ b/kernel/vfs/tty.c
@@ -178,6 +178,10 @@ void tty_input_process(pty_t * pty, uint8_t c) {
 		c = '\n';
 	}
 
+	if ((pty->tios.c_iflag & IUCLC) && (c >= 'A' && c <= 'Z')) {
+		c = c - 'A' + 'a';
+	}
+
 	if (pty->tios.c_lflag & ICANON) {
 
 		if (c == pty->tios.c_cc[VLNEXT] && (pty->tios.c_lflag & IEXTEN)) {