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17 hoursutil/nvmutil: use renameat for atomic writeLeah Rowe
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>
17 hoursutil/nvmutil: never do cross-filesystem movesLeah Rowe
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>
19 hoursutil/nvmutil: use new fs_open functions for gbeLeah Rowe
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>
19 hoursmkhtemp: show progname on errorLeah Rowe
i have my own getprogname implementation, because not every libc is good enough to include one. Signed-off-by: Leah Rowe <leah@libreboot.org>
26 hourslibreboot-utils: general code cleanupLeah Rowe
Signed-off-by: Leah Rowe <leah@libreboot.org>
29 hoursmkhtemp: unified non-error close handlingLeah Rowe
Signed-off-by: Leah Rowe <leah@libreboot.org>
33 hoursutil/mkhtemp: show path on error accessing itLeah Rowe
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>
34 hoursutil/mkhtemp: new utility (hardened mktemp)Leah Rowe
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>