TIOCGWINSZ, TIOCSWINSZ - get and set window size

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.

Standard C library (libc, -lc)

TIOCGWINSZ, TIOCSWINSZ - get and set window size

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

ioctl(2), ioctl_tty(2const) Linux man-pages 6.9.1 2024-06-13 TIOCSWINSZ(2const)

#include<asm/termbits.h> /* Definition of TIOC*WINSZ constants */ #include<sys/ioctl.h>intioctl(intfd,TIOCGWINSZ,structwinsize*argp);intioctl(intfd,TIOCSWINSZ,conststructwinsize*argp);#include<asm/termios.h>structwinsize{unsignedshortws_row;unsignedshortws_col;unsignedshortws_xpixel; /* unused */ unsignedshortws_ypixel; /* unused */ };