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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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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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this version is more tested. i'll merge _decode back
once it's better tested. it contains a lot of invasive
changes, whereas recv is much closer to the original GNU
code that i inherited, that i also know works quite well.
Signed-off-by: Leah Rowe <leah@libreboot.org>
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i should probably test musl as well, on linux
libreboot-utils is stable on the glibc systems i tested
with linux. it is quite buggy on bsd systems.
it's irresponsible to let users compile this until i've
properly tested the code. putting this error in for now.
i made lbmk use the old nvmutil version for now, and retro
fitted several improvements to i/o there from lbutils,
changes that i know are stable on bsd.
Signed-off-by: Leah Rowe <leah@libreboot.org>
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adapted from the changes made in lbutils
i'm just patching this crappy code. lbutils doesn't
work properly on openbsd yet, and i just want nvmutil
to work properly there, so i'm using the old code for
now, on openbsd.
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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guaranteed not to break on openbsd (tm)
Signed-off-by: Leah Rowe <leah@libreboot.org>
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don't fix it for now. this version was buggy.
i'm only using nvmutil for now, until i properly
fix all the memory issues in lbutils on openbsd.
Signed-off-by: Leah Rowe <leah@libreboot.org>
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same fix i did for lbutils
the nvmutil version is the same one used before
lbutils was introduced. just before.
Signed-off-by: Leah Rowe <leah@libreboot.org>
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i'm trying to make nvmutil work on openbsd. the new code
in lbutils is a bit buggy, likely somewhere in mkhtemp.
i'm still debugging it.
Signed-off-by: Leah Rowe <leah@libreboot.org>
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yay
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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Signed-off-by: Leah Rowe <leah@libreboot.org>
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Signed-off-by: Leah Rowe <leah@libreboot.org>
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check if above or equal to zero, except where
counterindicated. this is the usual way on unix,
where a command returns -1 on error, or above/equal
to zero on success.
Signed-off-by: Leah Rowe <leah@libreboot.org>
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missing EINTR handling fixed
Signed-off-by: Leah Rowe <leah@libreboot.org>
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in the linux fast path, we are universally overriding
errno with EEXIST, which pollutes errno in case of
debugging under fault condition. this is inconsistent
with posix and also leah.
Signed-off-by: Leah Rowe <leah@libreboot.org>
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make failure more obvious. no behavioural change.
Signed-off-by: Leah Rowe <leah@libreboot.org>
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but DONT LOOP IT. see comment.
Signed-off-by: Leah Rowe <leah@libreboot.org>
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Signed-off-by: Leah Rowe <leah@libreboot.org>
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not indicated. the way we use it is basically like
stat, to check that a file exists / is a file.
just err the fuck out
nuance: SETLK is non-blocking (no wait).
we should loop on SETLKW, but we don't use that.
in this codebase, we use SETLK for locking a
tmpfile, but because of race conditions and
wanting to make another file quickly, we just
try again with a newly generated name, with a
certain number of retries, so we justt use SETLK
Signed-off-by: Leah Rowe <leah@libreboot.org>
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not necessary.
Signed-off-by: Leah Rowe <leah@libreboot.org>
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clang -Weverything told me to
Signed-off-by: Leah Rowe <leah@libreboot.org>
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state is undefined after EINTR. just abort universally.
Signed-off-by: Leah Rowe <leah@libreboot.org>
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as dictated by clang -Weverything
Signed-off-by: Leah Rowe <leah@libreboot.org>
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clang -Weverything:
lib/file.c:165:49: warning: implicit conversion changes signedness: 'ssize_t' (aka 'long') to 'size_t' (aka 'unsigned long') [-Wsign-conversion]
165 | if (if_err(rval >= 0 && (size_t)rval > (nrw - rc), EOVERFLOW))
Signed-off-by: Leah Rowe <leah@libreboot.org>
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detected via clang -Weverything
Signed-off-by: Leah Rowe <leah@libreboot.org>
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not needed here (detected with clang -Weverything)
Signed-off-by: Leah Rowe <leah@libreboot.org>
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call it rw_exact, so that it's closer to
the name rw. it matches naming more closely;
the alternative was to call rw rw_file
but read/write can handle more than just files!
Signed-off-by: Leah Rowe <leah@libreboot.org>
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even with a timer, it's possible that on a buggy system,
we may keep writing even though the outcome is zero. if
a system comes back with zero bytes written, that is a
fatal bug and we should stop.
Signed-off-by: Leah Rowe <leah@libreboot.org>
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the actual warn flags are still there.
leaving Werror in production is ill advised.
i can (and will) still fix build errors as
i see them.
as a result of this, i now also see more info
when i type:
make strict
(this uses clang with -Weverything)
Signed-off-by: Leah Rowe <leah@libreboot.org>
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Signed-off-by: Leah Rowe <leah@libreboot.org>
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rw is enough. i unified everything there.
next commit will remove rw_type and instead
run positional i/o depending on whether the
offset is zero. i'm simplifying the API a lot.
Signed-off-by: Leah Rowe <leah@libreboot.org>
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add options for building with urandom+openat and
arc4+openat. useful for emulating a bsd / old linux
environment in modern linux distros, for portability
testing.
these options are not recommended for everyday use.
just use make without any special options, and the
code has build-time OS detection for features like
randomisation/openat2.
Signed-off-by: Leah Rowe <leah@libreboot.org>
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-DUSE_ARC4=1
use that
Signed-off-by: Leah Rowe <leah@libreboot.org>
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these can be set explicitly in the compiler flags,
e.g.
make CC="cc -DUSE_OPENAT=1 -DUSE_URANDOM=1"
these options, if set to 1, will cause you to use
the code as if it were running on non-linux systems
such as openbsd. of course, some differences will
still exist, but this is useful for portability
testing when compiling on linux.
Signed-off-by: Leah Rowe <leah@libreboot.org>
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and remove manual prototypes; fchmod, realpath
and so on rely on the _XOPEN_SOURCE macro.
the POSIX macro wasn't needed: _XOPEN_SOURCE
is sufficient.
Signed-off-by: Leah Rowe <leah@libreboot.org>
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use the POSIX one
declare prototypes where necessary.
Signed-off-by: Leah Rowe <leah@libreboot.org>
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Signed-off-by: Leah Rowe <leah@libreboot.org>
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otherwise, i will end up with a mess like the
one i recently fixed.
we always want to use correct C. the current
spec is set to c99, with -pedantic turned on.
flags now:
-Os -Wall -Wextra -std=c99 -pedantic -Werror
if you do: make hell, you get (uses clang):
-Os -Wall -Wextra -std=c99 -pedantic -Werror -Weverything
i initially loosened up the Makefile rules, so
that the code would be more "portable", but
every compiler worth caring about has these
flags, and turning them on is advisable,
especially pedantic and -std, because you want
to have some guarantee that the compiler is
generating correct code; if the standard is
left ambiguous, you could be introducing subtle
bugs when people compile it, because who knows
what spec the compiler is using?
Signed-off-by: Leah Rowe <leah@libreboot.org>
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i wasn't using strict mode enough in make:
make strict
now it compiles cleanly. mostly removing
unused variables, fixing implicit conversions,
etc.
Signed-off-by: Leah Rowe <leah@libreboot.org>
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but i can't write a generic function for this,
because fcntl is a variadic function, so wrapping
cannot be done cleanly.
Signed-off-by: Leah Rowe <leah@libreboot.org>
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