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handle it exclusively in writeGbeFile()
this reduces nvmutil.c sloccount to 261, versus 265
Signed-off-by: Leah Rowe <leah@libreboot.org>
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at this stage in the code, the file name will be NULL
value, so it would be improper to use it in a string.
Signed-off-by: Leah Rowe <leah@libreboot.org>
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the previous code size optimisations removed mention
of the file name, on file-related err() calls.
almost every error the user runs across will be file
related, so put the path on err() called from err_if()
Signed-off-by: Leah Rowe <leah@libreboot.org>
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use SIZE_4KB << 1 when needing 8KB size
Signed-off-by: Leah Rowe <leah@libreboot.org>
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use err_if instead
Signed-off-by: Leah Rowe <leah@libreboot.org>
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it is only used once. use err_if instead.
Signed-off-by: Leah Rowe <leah@libreboot.org>
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there is no need to have these as defines, when err_if
exists; get rid of xunveil and xpledge. use the bare
pledge and unveil functions directly, with err_if().
268 sloccount now on nvmutil.c, versus 289 sloccount
before this change, with no loss of functionality.
Signed-off-by: Leah Rowe <leah@libreboot.org>
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it doesn't really make sense to have nvmutil.h
since this is only a very small program and not
intended for use as a library
Signed-off-by: Leah Rowe <leah@libreboot.org>
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Signed-off-by: Leah Rowe <leah@libreboot.org>
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This cuts down on build time, and it will allow libreboot
to remove large chunks of code.
these ifd/gbe configs are just binary-encoded config files,
in a format well-understood. they can easily be opened up
and displayed, using ich9show or ifdtool, and manipulated
by these tools; bincfg can generate them from scratch, and
nvmutil can change mac addresses, for example.
so, do this and remove from lbmk the following:
* ich9utils (which contains ich9gen) - not needed anymore
* code in lbmk for handling ich9gen and insertions; the
coreboot build system is now used, for this same purpose,
so remove such code from lbmk
this results in a massive code size reduction (thousands of
lines) in lbmk; smaller when only looking at the build
system, but much larger when you consider that ich9utils
is also removed (about 3k sloc)
Signed-off-by: Leah Rowe <leah@libreboot.org>
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Signed-off-by: Leah Rowe <leah@libreboot.org>
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Signed-off-by: Leah Rowe <leah@libreboot.org>
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the loop in main() already checks EOF, and errno is
properly handled at the end of main()
we only need to call ferror(), to check error state
this fixes a bogus error message when pressing ctrl+D
to terminate the program, *which is the intended way
to terminate this program* (that, or EOF is reached
in any other another way)
do not treat intended behaviour as an error condition!
Signed-off-by: Leah Rowe <leah@libreboot.org>
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i've build-tested this code with clang and that also
works. in practise, a user is going to have clang or gcc
Signed-off-by: Leah Rowe <leah@libreboot.org>
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Signed-off-by: Leah Rowe <leah@libreboot.org>
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Signed-off-by: Leah Rowe <leah@libreboot.org>
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Signed-off-by: Leah Rowe <leah@libreboot.org>
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make it more obvious that this *is* a ring buffer being
handled, and make it more obvious when checking a pulse
in the next frame
Signed-off-by: Leah Rowe <leah@libreboot.org>
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Signed-off-by: Leah Rowe <leah@libreboot.org>
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i forked spkmodem-recv from coreboot, who forked it from
gnu grub. gnu grub's version has the full header, with
copyright declared as belonging to the fsf
coreboot made changes after forking it, and later replaced
the license declaration with an equivalent SPDX header, but
they also removed the FSF's copyright declaration, which by
itself does not void the declaration
anyway, i just feel better re-adding the full declaration.
make it so!
Signed-off-by: Leah Rowe <leah@libreboot.org>
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Signed-off-by: Leah Rowe <leah@libreboot.org>
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The last bit wasn't being handled, *and* ascii_bit
wasn't being reduced at all.
Signed-off-by: Leah Rowe <leah@libreboot.org>
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there's no point passing it as argument to a
function. it's used across more than one function,
so make it global
Signed-off-by: Leah Rowe <leah@libreboot.org>
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Signed-off-by: Leah Rowe <leah@libreboot.org>
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Signed-off-by: Leah Rowe <leah@libreboot.org>
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Signed-off-by: Leah Rowe <leah@libreboot.org>
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it's currently a build-time option
make it a runtime option instead, so that every
user can optionally make use of it, on all builds
Signed-off-by: Leah Rowe <leah@libreboot.org>
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thus, there's no need to handle flushing of stdout
whatsoever, and the code can be greatly simplified
ascii bits are still reset, when no input on stdin
is given
Signed-off-by: Leah Rowe <leah@libreboot.org>
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when spkmodem-recv doesn't receive anything (via stdout)
after a few frames, it's assumed that the console is dead
and the buffered output is flushed
this logic is assumed superfluous when -u is set
Signed-off-by: Leah Rowe <leah@libreboot.org>
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Signed-off-by: Leah Rowe <leah@libreboot.org>
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the logic for *setting* a character, and the logic
for outputting it, ought to be separate. do that.
Signed-off-by: Leah Rowe <leah@libreboot.org>
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Signed-off-by: Leah Rowe <leah@libreboot.org>
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Signed-off-by: Leah Rowe <leah@libreboot.org>
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my style was: 2 tabs. bsd-style, for extending a line, is
4 spaces. this style has grown on me, so let's do it here
Signed-off-by: Leah Rowe <leah@libreboot.org>
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Signed-off-by: Leah Rowe <leah@libreboot.org>
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my style of C programming is this: always return errno
upon exit from the program, or from a thread.
handle errno in the calling/forking function.
returning errno at the end of main has this intention:
if an unhandled error occured, the program exits with
non-zero status.
a correctly written program should *never* return non-zero
at the end of main, and if it does, this indicates a bug
in the code (per my code style / philosophy).
so, warn the user with a message if this occurs. the
intention is that this message should never be printed.
do not use assert() for this. i don't believe in that.
such a test should always be present, for everyone.
Signed-off-by: Leah Rowe <leah@libreboot.org>
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Signed-off-by: Leah Rowe <leah@libreboot.org>
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This version of spkmodem uses err() to indicate an error,
and the value of errno is used as exit status at all times,
even when it is zero.
When calling err(), it is intended that errno always be
non-zero, so modify the code accordingly.
Signed-off-by: Leah Rowe <leah@libreboot.org>
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also be more thorough about errno value when calling
pledge. rename variable in a for loop for clarity.
Signed-off-by: Leah Rowe <leah@libreboot.org>
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when calling fread(), errno may be set to EOVEFLOW if
the range being read will cause an integer overflow
if end-of-file is reached, errno may not be set. when
calling this function, you must check errno or check
feof() - ferror() should also be checked, so this check
is added immediately afterwards in the code
ferror() does not set errno, so ERR() is used to set
errno to ECANCELED as program exit status
further separate reading of frames into a new function
Signed-off-by: Leah Rowe <leah@libreboot.org>
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Signed-off-by: Leah Rowe <leah@libreboot.org>
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The mentality behind pledge and unveil is that you should
think ahead, so that large parts of code can run under
extremely tight restrictions.
The pledge calls have been adjusted accordingly, also.
Disallow all unveil calls after the gbe file and the
file /dev/urandom have been unveiled.
Signed-off-by: Leah Rowe <leah@libreboot.org>
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also remove wpath if using the dump command
Signed-off-by: Leah Rowe <leah@libreboot.org>
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in practise, no other condition would be met and the
program still worked. this is a pre-emptive fix.
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Signed-off-by: Leah Rowe <leah@libreboot.org>
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Also hardened the pledges.
Signed-off-by: Leah Rowe <leah@libreboot.org>
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Signed-off-by: Leah Rowe <leah@libreboot.org>
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This replaces a check in the function for O_RDONLY, and
fixes the bug where the "dump" command triggers such error.
Signed-off-by: Leah Rowe <leah@libreboot.org>
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Signed-off-by: Leah Rowe <leah@libreboot.org>
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*Open* files at the start, then unveil. The same overall
behaviour is observed. In the case that invalid arguments
are given, simply opening a file does not cause much
performance impact (if any).
Restrict operations as early as possible in code.
Bonus:
writeGbeFile also hardened; if flags is O_RDONLY, it aborts.
Signed-off-by: Leah Rowe <leah@libreboot.org>
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