/*
* resize - set terminal width and height.
*
- * Copyright 2006 Bernhard Fischer
+ * Copyright 2006 Bernhard Reutner-Fischer
*
- * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
-/* no options, no getopt */
+//config:config RESIZE
+//config: bool "resize (756 bytes)"
+//config: default y
+//config: help
+//config: This program is used to (re)set the width and height of your current
+//config: terminal.
+//config:
+//config:config FEATURE_RESIZE_PRINT
+//config: bool "Print environment variables"
+//config: default y
+//config: depends on RESIZE
+//config: help
+//config: Prints the newly set size (number of columns and rows) of
+//config: the terminal.
+//config: E.g.:
+//config: COLUMNS=80;LINES=44;export COLUMNS LINES;
+
+//applet:IF_RESIZE(APPLET_NOEXEC(resize, resize, BB_DIR_USR_BIN, BB_SUID_DROP, resize))
+/* bb_common_bufsiz1 usage here is safe wrt NOEXEC: not expecting it to be zeroed. */
+
+//kbuild:lib-$(CONFIG_RESIZE) += resize.o
+
+//usage:#define resize_trivial_usage
+//usage: ""
+//usage:#define resize_full_usage "\n\n"
+//usage: "Resize the screen"
+
#include "libbb.h"
+#include "common_bufsiz.h"
#define ESC "\033"
-#define old_termios (*(struct termios*)&bb_common_bufsiz1)
+#define old_termios_p ((struct termios*)bb_common_bufsiz1)
+#define INIT_G() do { setup_common_bufsiz(); } while (0)
static void
-onintr(int sig ATTRIBUTE_UNUSED)
+onintr(int sig UNUSED_PARAM)
{
- tcsetattr(STDERR_FILENO, TCSANOW, &old_termios);
- exit(1);
+ tcsetattr(STDERR_FILENO, TCSANOW, old_termios_p);
+ _exit(EXIT_FAILURE);
}
int resize_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int resize_main(int argc, char **argv)
+int resize_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
{
struct termios new;
- struct winsize w = { 0,0,0,0 };
+ struct winsize w = { 0, 0, 0, 0 };
int ret;
+ INIT_G();
+
/* We use _stderr_ in order to make resize usable
* in shell backticks (those redirect stdout away from tty).
* NB: other versions of resize open "/dev/tty"
* and operate on it - should we do the same?
*/
- tcgetattr(STDERR_FILENO, &old_termios); /* fiddle echo */
- new = old_termios;
+ tcgetattr(STDERR_FILENO, old_termios_p); /* fiddle echo */
+//TODO: die if the above fails?
+ memcpy(&new, old_termios_p, sizeof(new));
new.c_cflag |= (CLOCAL | CREAD);
new.c_lflag &= ~(ICANON | ECHO | ECHOE | ISIG);
bb_signals(0
*/
fprintf(stderr, ESC"7" ESC"[r" ESC"[999;999H" ESC"[6n");
alarm(3); /* Just in case terminal won't answer */
+//BUG: death by signal won't restore termios
scanf(ESC"[%hu;%huR", &w.ws_row, &w.ws_col);
fprintf(stderr, ESC"8");
* (gotten via TIOCGWINSZ) and recomputing *pixel values */
ret = ioctl(STDERR_FILENO, TIOCSWINSZ, &w);
- tcsetattr(STDERR_FILENO, TCSANOW, &old_termios);
+ tcsetattr(STDERR_FILENO, TCSANOW, old_termios_p);
if (ENABLE_FEATURE_RESIZE_PRINT)
printf("COLUMNS=%d;LINES=%d;export COLUMNS LINES;\n",