- add new applet resize.

text    data     bss     dec     hex filename
    185       0       0     185      b9 console-tools/resize.o
    255       0       0     255      ff console-tools/resize.o.print

console-tools/Config.in

@@ -58,6 +58,23 @@ config CONFIG_RESET
 	  This program is used to reset the terminal screen, if it
 	  gets messed up.
 
+config CONFIG_APP_RESIZE
+	bool "resize"
+	default n
+	help
+	  This program is used to (re)set the width and height of your current
+	  terminal.
+
+config CONFIG_FEATURE_RESIZE_PRINT
+	bool "print environment variables"
+	default n
+	depends on CONFIG_APP_RESIZE
+	help
+	  Prints the newly set size (number of columns and rows) of
+	  the terminal.
+	  E.g.:
+	  COLUMNS=80;LINES=44;export COLUMNS LINES;
+
 config CONFIG_SETCONSOLE
 	bool "setconsole"
 	default n

console-tools/Makefile.in

@@ -20,6 +20,7 @@ CONSOLETOOLS-$(CONFIG_LOADFONT)	+= loadfont.o
 CONSOLETOOLS-$(CONFIG_LOADKMAP)	+= loadkmap.o
 CONSOLETOOLS-$(CONFIG_OPENVT)	+= openvt.o
 CONSOLETOOLS-$(CONFIG_RESET)	+= reset.o
+CONSOLETOOLS-$(CONFIG_APP_RESIZE)	+= resize.o
 CONSOLETOOLS-$(CONFIG_SETKEYCODES)	+= setkeycodes.o
 CONSOLETOOLS-$(CONFIG_SETLOGCONS)	+= setlogcons.o
 

console-tools/resize.c

@@ -0,0 +1,38 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * resize - set terminal width and height.
+ *
+ * Copyright 2006 Bernhard Fischer
+ *
+ * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ */
+/* no options, no getopt */
+#include "busybox.h"
+
+int resize_main(int argc, char **argv)
+{
+	struct termios old, new;
+	struct winsize w = {0,0,0,0};
+	int ret;
+
+	tcgetattr(STDOUT_FILENO, &old); /* fiddle echo */
+	new = old;
+	new.c_cflag |= (CLOCAL | CREAD);
+	new.c_lflag &= ~(ICANON | ECHO | ECHOE | ISIG);
+	tcsetattr(STDOUT_FILENO, TCSANOW, &new);
+	/* save_cursor_pos 7
+	 * scroll_whole_screen [r
+	 * put_cursor_waaaay_off [$x;$yH
+	 * get_cursor_pos [6n
+	 * restore_cursor_pos 8
+	 */
+	printf("\0337\033[r\033[999;999H\033[6n");
+	scanf("\033[%hu;%huR", &w.ws_row, &w.ws_col);
+	ret = ioctl(STDOUT_FILENO, TIOCSWINSZ, &w);
+	printf("\0338");
+	tcsetattr(STDOUT_FILENO, TCSANOW, &old);
+	if (ENABLE_FEATURE_RESIZE_PRINT)
+		printf("COLUMNS=%d;LINES=%d;export COLUMNS LINES;",
+			w.ws_col, w.ws_row);
+	return ret;
+}

include/applets.h

@@ -226,6 +226,7 @@ USE_REALPATH(APPLET(realpath, _BB_DIR_USR_BIN, _BB_SUID_NEVER))
 USE_HALT(APPLET_ODDNAME(reboot, halt, _BB_DIR_SBIN, _BB_SUID_NEVER, reboot))
 USE_RENICE(APPLET(renice, _BB_DIR_USR_BIN, _BB_SUID_NEVER))
 USE_RESET(APPLET(reset, _BB_DIR_USR_BIN, _BB_SUID_NEVER))
+USE_APP_RESIZE(APPLET(resize, _BB_DIR_USR_BIN, _BB_SUID_NEVER))
 USE_RM(APPLET(rm, _BB_DIR_BIN, _BB_SUID_NEVER))
 USE_RMDIR(APPLET(rmdir, _BB_DIR_BIN, _BB_SUID_NEVER))
 USE_RMMOD(APPLET(rmmod, _BB_DIR_SBIN, _BB_SUID_NEVER))

include/usage.h

@@ -2455,6 +2455,11 @@ USE_FEATURE_MDEV_CONFIG( \
 #define reset_full_usage \
 	"Resets the screen."
 
+#define resize_trivial_usage \
+	""
+#define resize_full_usage \
+	"Resizes the screen."
+
 #define rm_trivial_usage \
 	"[OPTION]... FILE..."
 #define rm_full_usage \