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When deleting files, we *do* know the inode and attribute, most of the
time, so we pass those in whenever possible. The full purge of unmatched
xattrs should not happen when the correct dev/ino are believed to be known.
Signed-off-by: Seebs <seebs@seebs.net>
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extended attributes are a property of inodes, not paths. There can be
multiple file database entries for a single inode, so switch to using
inodes rather than paths.
Still to-do: Delete them when deleting the last file with a given device
and inode.
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Trying to track down problems which sometimes result in files showing
up as nameless files, producing clashes later. Looks like there were two
issues; one is we were creating links for files that we'd already
found by inode. The other is that rename was sending bogus LINK messages
in some cases. Also simplified the find_file_dev path to extract the
path as part of the initial operation, since there wasn't any case where
that wasn't being done immediately afterwards.
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Initial, incomplete, support for extended attributes. Extended
attributes are implemented fairly naively, using a second table
in the file database using the primary file table's id as a
foreign key. The ON DELETE CASCADE behavior requires sqlite 3.6.19
or later with foreign key and trigger support compiled in.
To reduce round-trips, the client does not check for existing
attributes, but rather, sends three distinct set messages;
OP_SET_XATTR, OP_CREATE_XATTR, OP_REPLACE_XATTR. A SET message
always succeeds, a CREATE fails if the attribute already
exists, and a REPLACE fails if the attribute does not already
exist.
The /* flags */ feature of makewrappers is used to correct
path names appropriately, so all functions are already working
with complete paths, and can always use functions that work
on links; if they were supposed to dereference, the path
fixup code got that.
The xattr support is enabled, for now, conditional on
whether getfattr --help succeeds.
Not yet implemented: Translation for system.posix_acl_access,
which is used by "cp -a" (or "cp --preserve-all") on some
systems to try to copy modes.
Signed-off-by: Peter Seebach <peter.seebach@windriver.com>
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It turns out that file databases don't get very large, and that
sqlite3 can be quite fast with an in-memory database. It also turns
out that dumping the database to disk on exit (or during idle times)
is pretty cheap compared to constant updates.
So: We add "--enable-memory-db", which defaults to on if you have
sqlite 3.7 or later, and off for 3.6 (because 3.6 has horrible
performance with in-memory db on some hosts we tried).
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are generated from text files and templates, making it now (we hope)
impossible for the list of strings to get out of sync with the
enum.
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one device to another, for instance.
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bug in the speculative-unlink operation.
The intent is to mark and then confirm or cancel the delete. This
removes the quirk where we tried to stash old database entries,
which didn't handle directories anyway; "rmdir non-empty-directory"
is a bit too common a case to dismiss as unthinkable.
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Add local variable cache via get_value and set_value. The local cache
is setup at constructor time (or soon after).
Rewrite the pseudo_setupenv and pseudo_dropenv routines, add a new
pseudo_setupenvp and pseudo_dropenvp as well to handle the execve
cases.
We can now successfully use /usr/bin/env -i env and get pseudo values
back!
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pdb_history was overloaded as a delete function. Separated this
out into a query-builder and a pair of functions to use it, which
makes it cleaner.
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When you rename across devices, inode can change. Until now,
pseudo had no tools for handling a change in inode, but this
is clearly a legitimate case.
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It is possible for the database to get out of sync with the
filesystem. Detecting this after the fact can be hard. Provide a
hook for requesting a check.
Also merge in some LD_LIBRARY_PATH fixes.
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Send program name (program_invocation_name from glibc) along with the
tag.
Along the way, restructure the fds/pids/tags arrays to be an array
of client structures in pseudo_server, and add the message type
to the set of things logged -- logging that a message was a ping is
more useful than appending the text "ping" to it. Add support
for type and program to pseudolog.
Add deletion to pseudolog.
Handle usage message formatting when there's an odd number of known
specifiers for pseudolog.
Conflicts:
ChangeLog.txt
pseudo_server.c
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This patch adds support for checking whether a file was opened for
reading, writing, or both, as well as tracking append flags. It is
not very well tested. This is preparation for improved host
contamination checking.
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seebs
Peter Seebach
seebs
Mark Hatle
Peter Seebach