В Tue, 06 Aug 2013 10:35:30 +0200
Pawel Wojtalczyk <address@hidden> пишет:
Hello,
I run GRUB2 as 64-bit EFI application and I use gfxterm and serial as
output.
I would like to edit commands before boot by type 'e' command. Then I
would like to boot by press ctrl-x, but unfortunately the boot does not
appears.
Does F10 work?
The reason is that in AMI and Phoenix BIOSes when ctrl key is pressed
then EFI_SIMPLE_TEXT_INPUT_PROTOCOL protocol returns VT100 style
encoding of pressed unicode character (
http://www.vt100.net/docs/vt100-ug/table3-5.html).
I tried to use EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL to get the pressed key
modifier (ctrl, alt, etc), but in case when serial console redirection
enabled in Phoenix BIOS, none characters are received via serial with
EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL(with AMI BIOS characters are received
in VT100 encoding style).
So maybe we can do another way. Maybe we can explicitly set key modifier
(as in grub_terminfo_getkey() with
http://wiki.phoenix.com/wiki/index.php/Unicode_Control_Characters
restrictions) as following:
--- grub.orig/grub-core/term/efi/console.c 2013-07-31
07:50:52.000000000 +0200
+++ grub/grub-core/term/efi/console.c 2013-08-06 10:28:26.117499386 +0200
@@ -125,7 +125,12 @@
return GRUB_TERM_NO_KEY;
if (key.scan_code == 0)
- return key.unicode_char;
+#if defined (__i386__) || defined (__x86_64__)
+ if (key.unicode_char < 0x20 && key.unicode_char != 0 &&
key.unicode_char != '\t' && key.unicode_char != '\b' && key.unicode_char
!= '\n' && key.unicode_char != '\r')
+ return GRUB_TERM_CTRL | (key.unicode_char - 1 + 'a');
+ else
+#endif /* defined (__i386__) || defined (__x86_64__) */
+ return key.unicode_char;
else if (key.scan_code < ARRAY_SIZE (efi_codes))
return efi_codes[key.scan_code];
In some remote systems EFI serial redirection must be enabled and thus
we cannot use serial (as termianl_input) module in GRUB2 and in such
case it would be good to allow add support for ctrl-x/ctrl-c under GRUB2
via serial console redirection enabled in EFI and attached USB keyboard.
Regrads
Pawel Wojtalczyk
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