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not rename(). use renameat()
this re-uses the logic added for mkhtemp.
this will later enable more stringent
integrity checks, though we already verify
the integrity of a file after writing it
back, and renameat is always tied to the
descriptor, so it's fine.
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 a local TMPDIR instead, where gbe.bin is.
this avoids the EXDEV errno, so we don't have
to handle it, and it's just better performant
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 unifies nvmutil's file handling with the
handling used by mkhtemp. a special function
has been written for this. this allows greater
flexibility since we can more easily check the
integrity of a file at inode/dev level; this
complements nvmutil's existing content-based
verification.
(this also fixes nvmutil, so that gbe files can
be changed again. mkhtemp broke it while i was
writing it, but now everything works again)
Signed-off-by: Leah Rowe <leah@libreboot.org>
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i have my own getprogname implementation,
because not every libc is good enough to
include one.
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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i was reorganising the state machine (singleton)
used for data, and part of what i wanted lead
to mkhtemp being written.
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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a bit naughty the way i do it, but it works. without
this, the message gets clobbered by EINVAL due to
a bad call to vprintf in the err function.
in this way, we ensure that there is a path, and
thus the errno does not get clobbered. i also
removed the EPERM setting in the env_tmpdir
function, which also clobbered errno.
with this fix, if TMPDIR is set but invalid,
it should now show the error reliably.
Signed-off-by: Leah Rowe <leah@libreboot.org>
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it may seem counterintuitive that a shorter suffix is
better, but i think we should ideally look just like
what is made my any other tool, and other mktemp
tools generate:
tmp.XXXXXXXXXX
this is the default, but of course it could be changed.
Signed-off-by: Leah Rowe <leah@libreboot.org>
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part of the same code library as nvmutil.
as part of this, i renamed util/nvmutil
to util/libreboot-utils/ because it is
now a multi-utility codebase.
this is more efficient, since i also wish
to use mkhtemp (function) in nvmutil.
Signed-off-by: Leah Rowe <leah@libreboot.org>
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