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What we were doing here amounts to simplifying the code for the new hush
parser, and the workarounds are required when using the old one. As we
have returned to having the old parser be default for now, we must undo
this so that the test passes again.
This reverts commit 6c2f753f4ad3dcee60190949d1286736a6d51d17.
Signed-off-by: Tom Rini <trini@konsulko.com>
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The dollar test was merged with bugous console behavior, and
instead of fixing it, this behavior was just workarounded.
It seems like without the fix the ut_assert_skipline(); didn't clear
console and running ut_assert_skipline(); many times would give always
OK. With
lib: membuff: fix readline not returning line in case of overflow
the line is cleared correctly and next assert fails because now there
is nothing to clean which is correct if we look the this a bit above
the failing assert:
if (gd->flags & GD_FLG_HUSH_MODERN_PARSER) {
/*
* For some strange reasons, the console is not empty after
* running above command.
* So, we reset it to not have side effects for other tests.
*/
console_record_reset_enable();
} else if (gd->flags & GD_FLG_HUSH_OLD_PARSER) {
ut_assert_console_end();
}
Which further confirms that tests workaround the old problem and now
that problem is fixed we can remove the whole if blocks and simply
place ut_assert_console_end() right after ut_assert_skipline() without
any conditional and will pass green.
So this part of code goes from:
ut_assert_skipline();
ut_assert_skipline();
if (gd->flags & GD_FLG_HUSH_MODERN_PARSER) {
/* See above comments. */
console_record_reset_enable();
} else if (gd->flags & GD_FLG_HUSH_OLD_PARSER) {
ut_assert_console_end();
}
to become:
ut_assert_skipline();
ut_assert_console_end();
Same thing should be done with the if block mentioned above that calls
console_record_reset_enable().
Signed-off-by: Ion Agorria <ion@agorria.com>
Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
Tested-by: Mattijs Korpershoek <mkorpershoek@baylibre.com>
Reviewed-by: Mattijs Korpershoek <mkorpershoek@baylibre.com>
Link: https://lore.kernel.org/r/20240105072212.6615-8-clamor95@gmail.com
[mkorpershoek: reworded commit title]
Signed-off-by: Mattijs Korpershoek <mkorpershoek@baylibre.com>
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Francis Laniel <francis.laniel@amarulasolutions.com> says:
During 2021 summer, Sean Anderson wrote a contribution to add a new shell, based
on LIL, to U-Boot [1, 2].
While one of the goals of this contribution was to address the fact actual
U-Boot shell, which is based on Busybox hush, is old there was a discussion
about adding a new shell versus updating the actual one [3, 4].
So, in this series, with Harald Seiler, we updated the actual U-Boot shell to
reflect what is currently in Busybox source code.
Basically, this contribution is about taking a snapshot of Busybox shell/hush.c
file (as it exists in commit 37460f5da) and adapt it to suit U-Boot needs.
This contribution was written to be as backward-compatible as possible to avoid
breaking the existing.
So, the modern hush flavor offers the same as the actual, that is to say:
1. Variable expansion.
2. Instruction lists (;, && and ||).
3. If, then and else.
4. Loops (for, while and until).
No new features offered by Busybox hush were implemented (e.g. functions).
It is possible to change the parser at runtime using the "cli" command:
=> cli print
old
=> cli set modern
=> cli print
modern
=> cli set old
The default parser is the old one.
Note that to use both parser, you would need to set both
CONFIG_HUSH_MODERN_PARSER and CONFIG_HUSH_OLD_PARSER.
In terms of testing, new unit tests were added to ut to ensure the new behavior
is the same as the old one and it does not add regression.
Nonetheless, if old behavior was buggy and fixed upstream, the fix is then added
to U-Boot [5].
In sandbox, all of these tests pass smoothly:
=> printenv board
board=sandbox
=> ut hush
Running 20 hush tests
...
Failures: 0
=> cli set modern
=> ut hush
Running 20 hush tests
...
Failures: 0
Thanks to the effort of Harald Seiler, I was successful booting a board:
=> printenv fdtfile
fdtfile=amlogic/meson-gxl-s905x-libretech-cc.dtb
=> cli get
old
=> boot
...
root@lepotato:~#
root@lepotato:~# reboot
...
=> cli set modern
=> cli get
modern
=> printenv fdtfile
fdtfile=amlogic/meson-gxl-s905x-libretech-cc.dtb
=> boot
...
root@lepotato:~#
This contribution indeed adds a lot of code and there were concern about its
size [6, 7].
With regard to the amount of code added, the cli_hush_upstream.c is 13030 lines
long but it seems a smaller subset is really used:
gcc -D__U_BOOT__ -E common/cli_hush_upstream.c | wc -l
2870
Despite this, it is better to still have the whole upstream code for the sake of
easing maintenance.
With regard to memory size, I conducted some experiments for version 8 of this
series and for a subset of arm64 boards and found the worst case to be 4K [8].
Tom Rini conducted more research on this and also found the increase to be
acceptable [9].
If you want to review it - your review will really be appreciated - here are
some information regarding the commits:
* commits marked as "test:" deal with unit tests.
* commit "cli: Add Busybox upstream hush.c file." copies Busybox shell/hush.c
into U-Boot tree, this explain why this commit contains around 12000 additions.
* commit "cli: Port Busybox 2021 hush to U-Boot." modifies previously added file
to permit us to use this as new shell.
The really good idea of #include'ing Busybox code into a wrapper file to define
some particular functions while minimizing modifications to upstream code comes
from Harald Seiler.
* commit "cmd: Add new parser command" adds a new command which permits
selecting parser at runtime.
I am not really satisfied with the fact it calls cli_init() and cli_loop() each
time the parser is set, so your reviews would be welcomed.
* Other commits focus on enabling features we need (e.g. if).
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Modifies return code got from while loop as modern hush always returns 0 from
while loop.
Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
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Modifies the expected result for modern hush.
Indeed, there were bugs in actual U-Boot hush which were fixed in upstream
Busybox.
As modern hush is based on upstream Busybox, these bugs no longer exist.
Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
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Modifies the expected result for modern hush.
Indeed, there were bugs in actual U-Boot hush which were fixed in upstream
Busybox.
As modern hush is based on upstream Busybox, these bugs no longer exist.
Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
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The added tests verifies correct behavior of for, while and until loops.
Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
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Verifies behavior of commands separated by ';', '&&' and '||'.
Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
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Verifies shell variables are replaced by their values.
Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
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As asked in commit 9c6bf1715f6a ("test/py: hush_if_test: Add tests to cover
octal/hex values"), this commit translates test_hush_if_test.py to a C test.
Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
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Introduce a new subcommand to ut: ut hush.
For the moment, this command does nothing, future commits will add tests which
will be run on command call.
Note that CONFIG_HUSH_PARSER must be defined to compile this new subcommand.
Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
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