Commit graph

216 commits

Author SHA1 Message Date
Paulo Flabiano Smorigo
cb2f15c544 normal/main: Search for specific config files for netboot
This patch implements a search for a specific configuration when the config
file is on a remoteserver. It uses the following order:
   1) DHCP client UUID option.
   2) MAC address (in lower case hexadecimal with dash separators);
   3) IP (in upper case hexadecimal) or IPv6;
   4) The original grub.cfg file.

This procedure is similar to what is used by pxelinux and yaboot:
http://www.syslinux.org/wiki/index.php/PXELINUX#config

It is enabled by default but can be disabled by setting the environment
variable "feature_net_search_cfg" to "n" in an embedded configuration.

Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=873406

Signed-off-by: Paulo Flabiano Smorigo <pfsmorigo@br.ibm.com>
Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
2020-02-18 15:12:06 +01:00
Javier Martinez Canillas
aa096037ae normal: Move common datetime functions out of the normal module
The common datetime helper functions are currently included in the normal
module, but this makes any other module that calls these functions to have
a dependency with the normal module only for this reason.

Since the normal module does a lot of stuff, it calls functions from other
modules. But since other modules may depend on it for calling the datetime
helpers, this could lead to circular dependencies between modules.

As an example, when platform == xen the grub_get_datetime() function from
the datetime module calls to the grub_unixtime2datetime() helper function
from the normal module. Which leads to the following module dependency:

    datetime -> normal

and send_dhcp_packet() from the net module calls the grub_get_datetime()
function, which leads to the following module dependency:

    net -> datetime -> normal

but that means that the normal module is not allowed to depend on net or
any other module that depends on it due the transitive dependency caused
by datetime. A recent patch attempted to add support to fetch the config
file over the network, which leads to the following circular dependency:

    normal -> net -> datetime -> normal

So having the datetime helpers in the normal module makes it quite fragile
and easy to add circular dependencies like these, that break the build due
the genmoddep.awk script catching the issues.

Fix this by taking the datetime helper functions out of the normal module
and instead add them to the datetime module itself. Besides fixing these
issues, it makes more sense to have these helper functions there anyways.

Reported-by: Daniel Kiper <daniel.kiper@oracle.com>
Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
2020-02-18 15:12:06 +01:00
Vladimir Serbinenko
ad4bfeec5c Change fs functions to add fs_ prefix
This avoid conflict with gnulib

Signed-off-by: Vladimir Serbinenko <phcoder@google.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
2019-04-09 10:03:29 +10:00
Paul Menzel
d3a3543a56 normal/menu: Do not treat error values as key presses
Some terminals, like `grub-core/term/at_keyboard.c`, return `-1` in case
they are not ready yet.

      if (! KEYBOARD_ISREADY (grub_inb (KEYBOARD_REG_STATUS)))
        return -1;

Currently, that is treated as a key press, and the menu time-out is
cancelled/cleared. This is unwanted, as the boot is stopped and the user
manually has to select a menu entry. Therefore, adapt the condition to
require the key value also to be greater than 0.

`GRUB_TERM_NO_KEY` is defined as 0, so the condition could be collapsed
to greater or equal than (≥) 0, but the compiler will probably do that
for us anyway, so keep the cases separate for clarity.

This is tested with coreboot, the GRUB default payload, and the
configuration file `grub.cfg` below.

For GRUB:

    $ ./autogen.sh
    $ ./configure --with-platform=coreboot
    $ make -j`nproc`
    $ make default_payload.elf

For coreboot:

    $ more grub.cfg
    serial --unit 0 --speed 115200
    set timeout=5

    menuentry 'halt' {
        halt
    }
    $ build/cbfstool build/coreboot.rom add-payload \
        -f /dev/shm/grub/default_payload.elf -n fallback/payload -c lzma
    $ build/cbfstool build/coreboot.rom add -f grub.cfg -n etc/grub.cfg -t raw
    $ qemu-system-x86_64 --version
    QEMU emulator version 3.1.0 (Debian 1:3.1+dfsg-2+b1)
    Copyright (c) 2003-2018 Fabrice Bellard and the QEMU Project developers
    $ qemu-system-x86_64 -M pc -bios build/coreboot.rom -serial stdio -nic none

Currently, the time-out is cancelled/cleared. With the commit, it is not.
With a small GRUB payload, this the problem is also reproducible on the
ASRock E350M1.

Link: http://lists.gnu.org/archive/html/grub-devel/2019-01/msg00037.html

Signed-off-by: Paul Menzel <pmenzel@molgen.mpg.de>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
2019-02-25 14:02:06 +01:00
Vladimir Serbinenko
ca0a4f689a verifiers: File type for fine-grained signature-verification controlling
Let's provide file type info to the I/O layer. This way verifiers
framework and its users will be able to differentiate files and verify
only required ones.

This is preparatory patch.

Signed-off-by: Vladimir Serbinenko <phcoder@gmail.com>
Signed-off-by: Daniel Kiper <daniel.kiper@oracle.com>
Reviewed-by: Ross Philipson <ross.philipson@oracle.com>
2018-11-09 13:25:31 +01:00
Pete Batard
bdd89d239c core: use GRUB_TERM_ definitions when handling term characters
* Also use hex value for GRUB_TERM_ESC as '\e' is not in the C standard and is not understood by some compilers
2017-08-07 19:28:22 +02:00
AppChecker
a0fe0c26aa crypto: Fix use after free.
Reported by: AppChecker
Transformed to patch by: Satish Govindarajan
2017-07-09 21:57:35 +02:00
Vladimir Serbinenko
0fd9fa565b charset: Trim away RLM and LRM.
They are not visible but would otherwise end up as [LRM] or [RLM] squares
with some fonts.
2017-01-31 19:29:31 +01:00
Thomas Huth
625934ec0f menu_entry: Disable cursor during update_screen()
When running grub in a VGA console of a KVM pseries guest on PowerPC,
you can see the cursor sweeping over the whole line when entering a
character in editor mode. This is visible because grub always refreshes
the whole line when entering a character in editor mode, and drawing
characters is quite a slow operation with the firmware used for the
powerpc pseries guests (SLOF).
To avoid this ugliness, the cursor should be disabled when refreshing
the screen contents during update_screen().

Signed-off-by: Thomas Huth <thuth@redhat.com>
2016-02-22 09:59:27 +03:00
Andrei Borzenkov
26533fe6bc normal: fix memory leak
Found by: Coverity scan.
CID: 96641, 96670, 96667
2016-01-12 22:40:03 +03:00
Andrei Borzenkov
93ecc3f1f8 menu: fix line count calculation for long lines
It gave one extra screen line if length was exactly equal to screen
width.

Reported by Michael Chang.
Also-By: Michael Chang <mchang@suse.com>
2015-12-30 06:20:51 +03:00
Andrei Borzenkov
7136b545c1 Erase backspaced character in grub_username_get
It probably does not work across linefeed, but hopefully user names are not
that long (and nobody is using terminal that small).
2015-12-16 19:20:10 +03:00
Hector Marco-Gisbert
451d80e52d Fix security issue when reading username and password
This patch fixes two integer underflows at:
  * grub-core/lib/crypto.c
  * grub-core/normal/auth.c

CVE-2015-8370

Signed-off-by: Hector Marco-Gisbert <hecmargi@upv.es>
Signed-off-by: Ismael Ripoll-Ripoll <iripoll@disca.upv.es>
Also-By: Andrey Borzenkov <arvidjaar@gmail.com>
2015-12-16 07:57:18 +03:00
Andrei Borzenkov
152695d0fa normal: fix memory leak
Found by: Coverity scan.
CID: 96677
2015-06-20 23:38:19 +03:00
Andrei Borzenkov
2a3ebf9428 normal: fix memory leak
Found by: Coverity scan.
CID: 96685
2015-06-20 23:38:18 +03:00
Michael Zimmermann
ed07b7e128 Add missing initializers to silence suprious warnings. 2015-03-27 14:44:41 +01:00
Vladimir Serbinenko
9ee5ae1fae Document intentional fallthroughs.
Found by: Coverity scan.
2015-01-27 17:17:58 +01:00
Vladimir Serbinenko
6603c22f31 normal/misc: Close device on all pathes.
Found by: Coverity scan.
2015-01-26 09:49:32 +01:00
Vladimir Serbinenko
73b1e83839 normal/main: Fix error handling.
Found by: Coverity scan.
2015-01-26 09:48:46 +01:00
Vladimir Serbinenko
44b38e4988 grub_menu_init_page: Avoid returning 0 geometry to avoid divisions by 0. 2015-01-21 17:42:15 +01:00
Vladimir Serbinenko
59d4036594 Replace explicit sizeof divisions by ARRAY_SIZE. 2015-01-21 17:37:31 +01:00
Vladimir Serbinenko
41c6f91fce * grub-core/normal/main.c: Don't drop to rescue console in
case of password-protected prompt and no menu entries.
2014-09-21 18:51:09 +02:00
Vladimir Serbinenko
5e42618e00 Fix wrong commit 2014-09-21 18:18:03 +02:00
Michael Chang
0aece00c54 * grub-core/osdep/unix/config.c: Remove extraneous comma. 2014-09-21 17:49:13 +02:00
Vladimir Serbinenko
41155a5722 * grub-core/normal/main.c (read_config_file): Buffer config file.
Reduces boot time.
2014-01-18 19:54:09 +01:00
Vladimir Serbinenko
5dbde526a8 Inline printf templates when possible to enable format checking. 2013-12-21 13:40:18 +01:00
Vladimir Serbinenko
8f5add13ff Implement syslinux parser. 2013-12-18 05:28:05 +01:00
Vladimir Serbinenko
dafff9ce44 * grub-core/normal/charset.c: Fix premature line wrap and crash.
Crash happened only in some cases like a string starting at the
	half of the screen of same length.
2013-12-11 17:06:00 +01:00
Andrey Borzenkov
9f2f979bcf always define config_directory and config_file as full pathname
If configfile is relative pathname, extend it with current ($root) so its
interpretation does not change if $root is changed later.

Suggested by Vladimir Serbienko.
2013-12-10 09:55:27 +04:00
Andrey Borzenkov
bb05e313eb use light-gray as default color in normal.mod for consistency
Defalut font color on PC console seems to be light-gray; this is
what user also gets in rescue prompt and what is defined as
GRUB_TERM_DEFAULT_NORMAL_COLOR. But normal.mod defaults to white.
This makes unpleasant visual effect as colors are changed after kernel
is booted.

Use the same color eveywhere for consistency and default to light-gray
as this is also what at least Linux kernel is using by default.
2013-12-07 20:00:48 +04:00
Vladimir Serbinenko
6f07c4e407 Pass font config to config.h and not by TARGET_CFLAGS as adding
arguments doesn't work if TARGET_CFLAGS is specified on command
	line.
2013-12-04 10:25:53 +01:00
Colin Watson
f315b508ae Reduce nesting level. 2013-12-03 16:11:00 +00:00
Colin Watson
8f236c1419 Revamp hidden timeout handling
Add a new timeout_style environment variable and a corresponding
GRUB_TIMEOUT_STYLE configuration key for grub-mkconfig.  This
controls hidden-timeout handling more simply than the previous
arrangements, and pressing any hotkeys associated with menu entries
during the hidden timeout will now boot the corresponding menu entry
immediately.

GRUB_HIDDEN_TIMEOUT=<non-empty> + GRUB_TIMEOUT=<non-zero> now
generates a warning, and if it shows the menu it will do so as if
the second timeout were not present.  Other combinations are
translated into reasonable equivalents.
2013-11-28 02:29:15 +00:00
Colin Watson
b7f9aedfac * grub-core/normal/progress.c: Remove unused file. 2013-11-21 15:37:57 +00:00
Vladimir Serbinenko
35d4761ce2 * grub-core/normal/cmdline.c (grub_cmdline_get): Plug memory leak. 2013-11-18 02:43:29 +01:00
Vladimir Serbinenko
b2e9294fb9 * grub-core/normal/datetime.c (grub_get_weekday): Use if rather than
division.
2013-11-13 09:26:13 +01:00
Josh Triplett
46d8a2033b * grub-core/normal/term.c (grub_set_more): Use bool logic rather than
increment/decrement.
2013-11-13 02:27:11 +01:00
Vladimir Serbinenko
800f63d38f * grub-core/normal/datetime.c (grub_get_weekday): Use unsigned types. 2013-11-08 19:14:03 +01:00
Vladimir Serbinenko
a67c755ef1 * grub-core/normal/cmdline.c (grub_cmdline_get):
Remove nested functions.
2013-11-07 02:42:38 +01:00
Vladimir Serbinenko
c03995d297 * grub-core/normal/charset.c (bidi_line_wrap): Eliminate nested
functions.
	(grub_bidi_line_logical_to_visual): Likewise.
2013-11-07 02:31:31 +01:00
Vladimir Serbinenko
e54b8f536b * include/grub/misc.h (grub_strcat): Removed. All users changed to
more appropriate functions.
2013-11-01 16:27:37 +01:00
Vladimir Serbinenko
10bafa1c38 * grub-core/normal/datetime.c (grub_unixtime2datetime): Fix mishandling
of first three years after start of validity of unixtime.
2013-10-26 02:47:40 +02:00
Vladimir Serbinenko
b1c6d03760 * grub-core/normal/menu_entry.c (get_logical_num_lines): Use unsigned
division as the one making more sense.
	(update_screen): Likewise.
	(complete): Likewise.
2013-10-26 01:01:06 +02:00
Vladimir Serbinenko
5f4028d4a5 * grub-core/normal/menu_entry.c (complete): Make sure that width is >0. 2013-10-26 00:07:59 +02:00
Vladimir Serbinenko
a28567364a Make char and string width grub_size_t rather than grub_ssize_t. 2013-10-25 23:58:24 +02:00
Vladimir Serbinenko
0a7e52b2ed * grub-core/normal/cmdline.c (grub_history_get): Make argument into
unsigned.
	(grub_history_replace): Likewise.
2013-10-25 22:58:19 +02:00
Vladimir 'phcoder' Serbinenko
c7037f1d0f * grub-core/normal/completion.c: Remove variable length arrays.
* grub-core/normal/menu_entry.c: Likewise.

	Reduces normal.mod by 496 bytes.
2013-10-20 13:55:35 +02:00
Vladimir 'phcoder' Serbinenko
e89c2d48a9 Lift 255x255 erminal sie restriction to 65535x65535. Also change from
bitmasks to small structures of size chosen to fit in registers.
2013-10-19 23:59:32 +02:00
Vladimir 'phcoder' Serbinenko
c06c75201c Split grub-setup.c into frontend (grub-setup.c) and backend (setup.c)
files.
2013-10-15 16:16:04 +02:00
Vladimir 'phcoder' Serbinenko
a2371e19b3 * grub-core/normal/charset.c (bidi_line_wrap): Fix spurios warning. 2013-07-11 13:34:20 +02:00