logic here gets a little complex, but the net effect is that the
SECURE_SYMLINKS flag will prevent us from ever following a symlink.
Without it, we'll only follow symlinks to dirs. bsdtar specifies
SECURE_SYMLINKS by default, suppresses it for -P.
I've also beefed up the write_disk_secure test to verify this
behavior.
PR: bin/126849
unspecified size are "unlimited" (required by Zip reader, which
sometimes does not know the uncompressed size of an entry until it
gets to the end). Also, hardlinks with unspecified (or zero) size do
not overwrite the data on disk nor do they set metadata. This is
compatible with GNU tar and NetBSD pax behavior.
This generalizes the existing set/unset tracking for hardlink/symlink
fields and extends it to cover non-string fields. Eventually, this
will be further extended to cover most fields.
In particular, this is needed to correctly detect when time fields
are missing (for example, reading ustar archives doesn't set atime or
ctime) for proper time restore and is helpful when trying to determine
whether to overwrite data when restoring hardlinks.
This commit updates the tests but not the docs.
Since various 'find' incantations can emit container directories
in various orders, we cannot refuse to update a dir because it's
apparently the same age.
MFC after: 3 days
understand which code paths aren't possible.
This commit eliminates 117 false positive bug reports of the form
"allocate memory; error out if pointer is NULL; use pointer".
schedule a chmod() fixup for directories. In particular, this fixes
sgid handling on systems where the sgid bit is inherited from the
parent directory (which means that the actual mode of the dir
does not match the mode used in the mkdir() system call.
It may be possible to tighten this condition a bit. In
working through this, I also found a few other places where
it looks like we can avoid a redundant syscall or two. I've
commented those here but not yet tried to address them.
file into a separate file (instead of embedding it in the C code)
and use later timestamps (timestamps too close to the Epoch fail
predictably on systems that lack timegm(), whose mktime() doesn't
support dates before the Epoch and which are running in timezones
with negative offsets from GMT). The goal here is to test the ISO
extraction, not the local platform's time support.
operation) and not ARCHIVE_WARN, since we don't actually open the file.
Both bsdtar and bsdcpio will try to copy file contents after an ARCHIVE_WARN,
which will fail loudly.
