From 32b60cc0db90e517399ca9fa73a8ac1140db810d Mon Sep 17 00:00:00 2001
From: Denys Vlasenko <vda.linux@googlemail.com>
Date: Sun, 6 Aug 2017 12:17:46 +0200
Subject: kbd_mode: try harder to find console device if -C TTY is not given
Was (under X):
$ ./busybox_old kbd_mode
kbd_mode: ioctl 0x4b44 failed: Inappropriate ioctl for device
Now:
$ ./busybox kbd_mode
The keyboard is in off mode
function old new delta
kbd_mode_main 166 174 +8
packed_usage 31782 31764 -18
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/1 up/down: 8/-18) Total: -10 bytes
text data bss dec hex filename
915757 485 6880 923122 e15f2 busybox_old
915747 485 6880 923112 e15e8 busybox_unstripped
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
---
console-tools/kbd_mode.c | 22 ++++++++++++++--------
libbb/get_console.c | 1 -
2 files changed, 14 insertions(+), 9 deletions(-)
diff --git a/console-tools/kbd_mode.c b/console-tools/kbd_mode.c
index da31af28d..b0b594614 100644
--- a/console-tools/kbd_mode.c
+++ b/console-tools/kbd_mode.c
@@ -22,7 +22,7 @@
//usage:#define kbd_mode_trivial_usage
//usage: "[-a|k|s|u] [-C TTY]"
//usage:#define kbd_mode_full_usage "\n\n"
-//usage: "Report or set the keyboard mode\n"
+//usage: "Report or set VT console keyboard mode\n"
//usage: "\n -a Default (ASCII)"
//usage: "\n -k Medium-raw (keycode)"
//usage: "\n -s Raw (scancode)"
@@ -43,15 +43,20 @@ int kbd_mode_main(int argc UNUSED_PARAM, char **argv)
};
int fd;
unsigned opt;
-//TODO? kbd-2.0.3 without -C tries in sequence:
-//fd#0, /dev/tty, /dev/tty0.
-//Also, it checks KDGKBTYPE before doing KDGKBMODE
-//maybe we can use get_console_fd_or_die()?
- const char *tty_name = CURRENT_TTY;
+ const char *tty_name;
opt = getopt32(argv, "sakuC:", &tty_name);
- fd = xopen_nonblocking(tty_name);
- opt &= 0xf; /* clear -C bit, see (*) */
+ if (opt & 0x10) {
+ opt &= 0xf; /* clear -C bit, see (*) */
+ fd = xopen_nonblocking(tty_name);
+ } else {
+ /* kbd-2.0.3 tries in sequence:
+ * fd#0, /dev/tty, /dev/tty0.
+ * get_console_fd_or_die: /dev/console, /dev/tty0, /dev/tty.
+ * kbd-2.0.3 checks KDGKBTYPE, get_console_fd_or_die checks too.
+ */
+ fd = get_console_fd_or_die();
+ }
if (!opt) { /* print current setting */
const char *mode = "unknown";
@@ -79,6 +84,7 @@ int kbd_mode_main(int argc UNUSED_PARAM, char **argv)
* #define K_OFF 0x04
* (looks like "-ak" together would cause the same effect as -u)
*/
+ opt &= 0xf; /* clear -C bit */
opt = opt & UNICODE ? 3 : opt >> 1;
/* double cast prevents warnings about widening conversion */
xioctl(fd, KDSKBMODE, (void*)(ptrdiff_t)opt);
diff --git a/libbb/get_console.c b/libbb/get_console.c
index 9b6407bd0..96b339ca7 100644
--- a/libbb/get_console.c
+++ b/libbb/get_console.c
@@ -64,7 +64,6 @@ int FAST_FUNC get_console_fd_or_die(void)
}
bb_error_msg_and_die("can't open console");
- /*return fd; - total failure */
}
/* From <linux/vt.h> */
--
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