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Diffstat (limited to 'i/pc104/initrd/conf/busybox/console-tools/resize.c')
-rw-r--r--i/pc104/initrd/conf/busybox/console-tools/resize.c70
1 files changed, 70 insertions, 0 deletions
diff --git a/i/pc104/initrd/conf/busybox/console-tools/resize.c b/i/pc104/initrd/conf/busybox/console-tools/resize.c
new file mode 100644
index 0000000..64f318c
--- /dev/null
+++ b/i/pc104/initrd/conf/busybox/console-tools/resize.c
@@ -0,0 +1,70 @@
+/* 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"
+
+#define ESC "\033"
+
+struct termios old;
+
+static void
+onintr(int sig ATTRIBUTE_UNUSED)
+{
+ tcsetattr(STDERR_FILENO, TCSANOW, &old);
+ exit(1);
+}
+
+
+int resize_main(int argc, char **argv);
+int resize_main(int argc, char **argv)
+{
+ struct termios new;
+ struct winsize w = { 0,0,0,0 };
+ int ret;
+
+ /* 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); /* fiddle echo */
+ new = old;
+ new.c_cflag |= (CLOCAL | CREAD);
+ new.c_lflag &= ~(ICANON | ECHO | ECHOE | ISIG);
+ signal(SIGINT, onintr);
+ signal(SIGQUIT, onintr);
+ signal(SIGTERM, onintr);
+ signal(SIGALRM, onintr);
+ tcsetattr(STDERR_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
+ */
+ fprintf(stderr, ESC"7" ESC"[r" ESC"[999;999H" ESC"[6n");
+ alarm(3); /* Just in case terminal won't answer */
+ scanf(ESC"[%hu;%huR", &w.ws_row, &w.ws_col);
+ fprintf(stderr, ESC"8");
+
+ /* BTW, other versions of resize recalculate w.ws_xpixel, ws.ws_ypixel
+ * by calculating character cell HxW from old values
+ * (gotten via TIOCGWINSZ) and recomputing *pixel values */
+ ret = ioctl(STDERR_FILENO, TIOCSWINSZ, &w);
+
+ tcsetattr(STDERR_FILENO, TCSANOW, &old);
+
+ if (ENABLE_FEATURE_RESIZE_PRINT)
+ printf("COLUMNS=%d;LINES=%d;export COLUMNS LINES;\n",
+ w.ws_col, w.ws_row);
+
+ return ret;
+}