1 /* vi: set sw=4 ts=4: */
3 * resize - set terminal width and height.
5 * Copyright 2006 Bernhard Reutner-Fischer
7 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
9 /* no options, no getopt */
14 #define old_termios_p ((struct termios*)&bb_common_bufsiz1)
17 onintr(int sig UNUSED_PARAM)
19 tcsetattr(STDERR_FILENO, TCSANOW, old_termios_p);
23 int resize_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
24 int resize_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
27 struct winsize w = { 0, 0, 0, 0 };
30 /* We use _stderr_ in order to make resize usable
31 * in shell backticks (those redirect stdout away from tty).
32 * NB: other versions of resize open "/dev/tty"
33 * and operate on it - should we do the same?
36 tcgetattr(STDERR_FILENO, old_termios_p); /* fiddle echo */
37 memcpy(&new, old_termios_p, sizeof(new));
38 new.c_cflag |= (CLOCAL | CREAD);
39 new.c_lflag &= ~(ICANON | ECHO | ECHOE | ISIG);
46 tcsetattr(STDERR_FILENO, TCSANOW, &new);
49 * scroll_whole_screen [r
50 * put_cursor_waaaay_off [$x;$yH
52 * restore_cursor_pos 8
54 fprintf(stderr, ESC"7" ESC"[r" ESC"[999;999H" ESC"[6n");
55 alarm(3); /* Just in case terminal won't answer */
56 scanf(ESC"[%hu;%huR", &w.ws_row, &w.ws_col);
57 fprintf(stderr, ESC"8");
59 /* BTW, other versions of resize recalculate w.ws_xpixel, ws.ws_ypixel
60 * by calculating character cell HxW from old values
61 * (gotten via TIOCGWINSZ) and recomputing *pixel values */
62 ret = ioctl(STDERR_FILENO, TIOCSWINSZ, &w);
64 tcsetattr(STDERR_FILENO, TCSANOW, old_termios_p);
66 if (ENABLE_FEATURE_RESIZE_PRINT)
67 printf("COLUMNS=%d;LINES=%d;export COLUMNS LINES;\n",