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TIOCSWINSZ(2const) — Linux manual page

TIOCSWINSZ(2const)TIOCSWINSZ(2const)

NAME        top

       TIOCGWINSZ, TIOCSWINSZ - get and set window size

LIBRARY        top

       Standard C library (libc,-lc)

SYNOPSIS        top

#include <asm/termbits.h>/* Definition ofTIOC*WINSZconstants */#include <sys/ioctl.h>int ioctl(intfd, TIOCGWINSZ, struct winsize *argp);int ioctl(intfd, 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        top

       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, aSIGWINCHsignal is sent to the       foreground process group.

RETURN VALUE        top

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

SEE ALSO        top

ioctl(2),ioctl_tty(2const)

COLOPHON        top

       This page is part of theman-pages (Linux kernel and C library       user-space interface documentation) project.  Information about       the project can be found at        ⟨https://www.kernel.org/doc/man-pages/⟩.  If you have a bug report       for this manual page, see       ⟨https://git.kernel.org/pub/scm/docs/man-pages/man-pages.git/tree/CONTRIBUTING⟩.       This page was obtained from the tarball man-pages-6.15.tar.gz       fetched from       ⟨https://mirrors.edge.kernel.org/pub/linux/docs/man-pages/⟩ on       2025-08-11.  If you discover any rendering problems in this HTML       version of the page, or you believe there is a better or more up-       to-date source for the page, or you have corrections or       improvements to the information in this COLOPHON (which isnot       part of the original manual page), send a mail to       man-pages@man7.orgLinux man-pages 6.15            2025-05-17TIOCSWINSZ(2const)

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