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 source tree.
9 /* no options, no getopt */
11 //usage:#define resize_trivial_usage
13 //usage:#define resize_full_usage "\n\n"
14 //usage: "Resize the screen"
17 #include "common_bufsiz.h"
21 #define old_termios_p ((struct termios*)bb_common_bufsiz1)
22 #define INIT_G() do { setup_common_bufsiz(); } while (0)
25 onintr(int sig UNUSED_PARAM)
27 tcsetattr(STDERR_FILENO, TCSANOW, old_termios_p);
31 int resize_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
32 int resize_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
35 struct winsize w = { 0, 0, 0, 0 };
40 /* We use _stderr_ in order to make resize usable
41 * in shell backticks (those redirect stdout away from tty).
42 * NB: other versions of resize open "/dev/tty"
43 * and operate on it - should we do the same?
46 tcgetattr(STDERR_FILENO, old_termios_p); /* fiddle echo */
47 memcpy(&new, old_termios_p, sizeof(new));
48 new.c_cflag |= (CLOCAL | CREAD);
49 new.c_lflag &= ~(ICANON | ECHO | ECHOE | ISIG);
56 tcsetattr(STDERR_FILENO, TCSANOW, &new);
59 * scroll_whole_screen [r
60 * put_cursor_waaaay_off [$x;$yH
62 * restore_cursor_pos 8
64 fprintf(stderr, ESC"7" ESC"[r" ESC"[999;999H" ESC"[6n");
65 alarm(3); /* Just in case terminal won't answer */
66 //BUG: death by signal won't restore termios
67 scanf(ESC"[%hu;%huR", &w.ws_row, &w.ws_col);
68 fprintf(stderr, ESC"8");
70 /* BTW, other versions of resize recalculate w.ws_xpixel, ws.ws_ypixel
71 * by calculating character cell HxW from old values
72 * (gotten via TIOCGWINSZ) and recomputing *pixel values */
73 ret = ioctl(STDERR_FILENO, TIOCSWINSZ, &w);
75 tcsetattr(STDERR_FILENO, TCSANOW, old_termios_p);
77 if (ENABLE_FEATURE_RESIZE_PRINT)
78 printf("COLUMNS=%d;LINES=%d;export COLUMNS LINES;\n",