From c94f031be52031bdfaef5c4757459138d78aac0c Mon Sep 17 00:00:00 2001
From: Jonas 'Sortie' Termansen <sortie@maxsi.org>
Date: Fri, 28 Jun 2024 10:46:06 +0200
Subject: [PATCH] Add tcsetwinsize(2).

---
 libc/Makefile               |  1 +
 libc/include/termios.h      |  8 ++++++--
 libc/termios/tcsetwinsize.c | 27 +++++++++++++++++++++++++++
 3 files changed, 34 insertions(+), 2 deletions(-)
 create mode 100644 libc/termios/tcsetwinsize.c

diff --git a/libc/Makefile b/libc/Makefile
index 0f03296c..6194e004 100644
--- a/libc/Makefile
+++ b/libc/Makefile
@@ -661,6 +661,7 @@ termios/tcgetwinsize.o \
 termios/tcsendbreak.o \
 termios/tcsetattr.o \
 termios/tcsetblob.o \
+termios/tcsetwinsize.o \
 time/clock_getres.o \
 time/clock_gettime.o \
 time/clock_gettimeres.o \
diff --git a/libc/include/termios.h b/libc/include/termios.h
index a801d53f..49328b27 100644
--- a/libc/include/termios.h
+++ b/libc/include/termios.h
@@ -27,7 +27,7 @@
 #include <sys/__/types.h>
 
 #include <sortix/termios.h>
-#if __USE_SORTIX
+#if __USE_SORTIX || 202405L <= __USE_POSIX
 #include <sortix/winsize.h>
 #endif
 
@@ -67,13 +67,17 @@ pid_t tcgetsid(int);
 int tcsendbreak(int, int);
 int tcsetattr(int, int, const struct termios*);
 
+#if __USE_SORTIX || 202405L <= __USE_POSIX
+int tcgetwinsize(int, struct winsize*);
+int tcsetwinsize(int, const struct winsize*);
+#endif
+
 /* Functions that are Sortix extensions. */
 #if __USE_SORTIX
 int mkpty(int*, int*, int);
 ssize_t tcgetblob(int, const char*, void*, size_t);
 ssize_t tcsetblob(int, const char*, const void*, size_t);
 int tcgetwincurpos(int, struct wincurpos*);
-int tcgetwinsize(int, struct winsize*);
 #endif
 
 #ifdef __cplusplus
diff --git a/libc/termios/tcsetwinsize.c b/libc/termios/tcsetwinsize.c
new file mode 100644
index 00000000..58f450b4
--- /dev/null
+++ b/libc/termios/tcsetwinsize.c
@@ -0,0 +1,27 @@
+/*
+ * Copyright (c) 2024 Jonas 'Sortie' Termansen.
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ * termios/tcsetwinsize.c
+ * Set the terminal resolution.
+ */
+
+#include <sys/ioctl.h>
+
+#include <termios.h>
+
+int tcsetwinsize(int fd, const struct winsize* ws)
+{
+	return ioctl(fd, TIOCSWINSZ, ws);
+}