add tcgetwinsize and tcsetwinsize functions, move struct winsize

these have been adopted for future issue of POSIX as the outcome of
Austin Group issue 1151, and are simply functions performing the roles
of the historical ioctls. since struct winsize is being standardized
along with them, its definition is moved to the appropriate header.

there is some chance this will break source files that expect struct
winsize to be defined by sys/ioctl.h without including termios.h. if
this happens, further changes will be needed to have sys/ioctl.h
expose it too.

1 files changed, 8 insertions, 0 deletions

diff --git a/src/termios/tcgetwinsize.c b/src/termios/tcgetwinsize.c
new file mode 100644
index 0000000..9b3a65a
--- /dev/null
+++ b/src/termios/tcgetwinsize.c
@@ -0,0 +1,8 @@
+#include <termios.h>
+#include <sys/ioctl.h>
+#include "syscall.h"
+
+int tcgetwinsize(int fd, struct winsize *wsz)
+{
+	return syscall(SYS_ioctl, fd, TIOCGWINSZ, wsz);
+}