NAME

       TIOCGWINSZ, TIOCSWINSZ - get and set window size

LIBRARY

       Standard C library (libc, -lc)

SYNOPSIS

       #include <asm/termbits.h>  /* Definition of TIOC*WINSZ constants */
       #include <sys/ioctl.h>

       int ioctl(int fd, TIOCGWINSZ, struct winsize *argp);
       int ioctl(int fd, TIOCSWINSZ, const struct winsize *argp);

       #include <asm/termios.h>

       struct winsize {
           unsigned short ws_row;
           unsigned short ws_col;
           unsigned short ws_xpixel;  /* unused */
           unsigned short ws_ypixel;  /* unused */
       };

DESCRIPTION

       Window  sizes  are  kept  in the kernel, but not used by the kernel (except in the case of
       virtual consoles, where the kernel will update the  window  size  when  the  size  of  the
       virtual console changes, for example, by loading a new font).

       TIOCGWINSZ
              Get window size.

       TIOCSWINSZ
              Set window size.

       When the window size changes, a SIGWINCH signal is sent to the foreground process group.

RETURN VALUE

       On  success,  0  is  returned.  On error, -1 is returned, and errno is set to indicate the
       error.

SEE ALSO

       ioctl(2), ioctl_tty(2const)