LibC: Implement tc{get,set}winsize

These were added in POSIX issue 8 :^)

userspace/libraries/LibC/include/sys/ioctl.h

@@ -42,15 +42,8 @@ __BEGIN_DECLS
 #define FIONREAD	40 /* get number of input bytes available */
 #define FIONBIO		41
 
-struct winsize
-{
-	unsigned short ws_row;
-	unsigned short ws_col;
-	unsigned short ws_xpixel; /* unused by kernel */
-	unsigned short ws_ypixel; /* unused by kernel */
-};
-#define TIOCGWINSZ 50
-#define TIOCSWINSZ 51
+#define TIOCGWINSZ	50
+#define TIOCSWINSZ	51
 #define TCGETS      52
 #define TCSETS      53
 #define TCSETSW     54

userspace/libraries/LibC/include/termios.h

@@ -1,7 +1,7 @@
 #ifndef _TERMIOS_H
 #define _TERMIOS_H 1
 
-// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/termios.h.html
+// https://pubs.opengroup.org/onlinepubs/9799919799/basedefs/termios.h.html
 
 #include <sys/cdefs.h>
 
@@ -39,6 +39,14 @@ struct termios
 	speed_t     c_ispeed;
 };
 
+struct winsize
+{
+	unsigned short ws_row;
+	unsigned short ws_col;
+	unsigned short ws_xpixel; /* unused by kernel */
+	unsigned short ws_ypixel; /* unused by kernel */
+};
+
 #define BRKINT	0x001
 #define ICRNL	0x002
 #define IGNBRK	0x004
@@ -143,8 +151,10 @@ int		tcflow(int fildes, int action);
 int		tcflush(int fildes, int queue_selector);
 int		tcgetattr(int fildes, struct termios* termios_p);
 pid_t	tcgetsid(int fildes);
+int		tcgetwinsize(int fildes, struct winsize* winsize_p);
 int		tcsendbreak(int fildes, int duration);
 int		tcsetattr(int fildes, int optional_actions, const struct termios* termios_p);
+int		tcsetwinsize(int fildes, const struct winsize* winsize_p);
 
 __END_DECLS
 

userspace/libraries/LibC/termios.cpp

@@ -117,3 +117,13 @@ int tcsendbreak(int fd, int duration)
 	dwarnln("FIXME: tcsendbreak({}, {})", fd, duration);
 	return -1;
 }
+
+int tcgetwinsize(int fildes, struct winsize* winsize_p)
+{
+	return ioctl(fildes, TIOCGWINSZ, winsize_p);
+}
+
+int tcsetwinsize(int fildes, const struct winsize* winsize_p)
+{
+	return ioctl(fildes, TIOCSWINSZ, winsize_p);
+}

userspace/programs/Terminal/Terminal.cpp

@@ -9,8 +9,8 @@
 #include <fcntl.h>
 #include <signal.h>
 #include <stdlib.h>
-#include <sys/ioctl.h>
 #include <sys/select.h>
+#include <termios.h>
 #include <time.h>
 #include <unistd.h>
 
@@ -141,14 +141,14 @@ void Terminal::run()
 	m_cells_cols = cols();
 
 	{
-		winsize winsize {
+		const winsize winsize {
 			.ws_row = static_cast<unsigned short>(rows()),
 			.ws_col = static_cast<unsigned short>(cols()),
 			.ws_xpixel = static_cast<unsigned short>(m_window->width()),
 			.ws_ypixel = static_cast<unsigned short>(m_window->height()),
 		};
-		if (ioctl(m_shell_info.pts_master, TIOCSWINSZ, &winsize) == -1)
-			perror("ioctl");
+		if (tcsetwinsize(m_shell_info.pts_master, &winsize) == -1)
+			perror("tcsetwinsize");
 	}
 
 	{
@@ -212,11 +212,8 @@ void Terminal::run()
 			.ws_xpixel = static_cast<unsigned short>(m_window->width()),
 			.ws_ypixel = static_cast<unsigned short>(m_window->height()),
 		};
-		if (ioctl(m_shell_info.pts_master, TIOCSWINSZ, &winsize) == -1)
-		{
-			perror("ioctl");
-			return;
-		}
+		if (tcsetwinsize(m_shell_info.pts_master, &winsize) == -1)
+			perror("tcsetwinsize");
 	});
 
 	m_window->set_key_event_callback([&](LibGUI::EventPacket::KeyEvent::event_t event) {

userspace/programs/ls/main.cpp

@@ -8,8 +8,8 @@
 #include <grp.h>
 #include <pwd.h>
 #include <stdio.h>
-#include <sys/ioctl.h>
 #include <sys/stat.h>
+#include <termios.h>
 
 struct config_t
 {
@@ -406,7 +406,7 @@ int main(int argc, const char* argv[])
 	else for (; i < argc; i++)
 		MUST(files.emplace_back(BAN::StringView(argv[i])));
 
-	g_stdout_terminal = isatty(STDOUT_FILENO) && ioctl(STDOUT_FILENO, TIOCGWINSZ, &g_terminal_size) == 0;
+	g_stdout_terminal = isatty(STDOUT_FILENO) && tcgetwinsize(STDOUT_FILENO, &g_terminal_size) == 0;
 
 	int ret = 0;
 	for (size_t i = 0; i < files.size(); i++)