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feature.
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In fakechroot, which pseudo tries to match the functionality of,
the default behavior when creating a symlink with an absolute target
is to prepend the chroot path, so that underlying syscalls will
get the right file.
It is necessary to be able to disable this behavior to create target
filesystems in some cases. To that end, support a new environment
variable, PSEUDO_NOSYMLINKEXP, which disables that behavior.
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The PSEUDO_DEBUG_FILE feature is enhanced, and is now also used by the
pseudo server.
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Address a couple of compiler warnings, add a couple of signals to the
list of caught signals, etcetera.
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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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Stop vacuuming the logs database under normal usage -- it's expensive
and slow, and not useful.
Make link(2) "correctly" (following Linux, rather than POSIX) link
to a symlink rather than to the file the symlink links to.
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If multiple clients are active at once, the following could occur:
* Client #1 unlinks file A
* Client #2 creates file B, which reuses A's inode
* Client #2 sends request to server
* Client #1 sends request to server
* Processing client #2's request creates a mismatch warning for
file A/B.
* Processing client #1's request creates a mismatch warning too.
Note that this can happen even if Client #2 sends its request later,
as there's no intrinsic guarantee of the order in which requests
are processed; any SINGLE client is presumably executing operations
in order, but multiple clients aren't.
Fixing this in rmdir, unlink, and rename.
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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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* Add lckpwdf/ulckpwdf to guts/README
* Remove arguments from function pointer arguments.
While in theory the compar function pointer has always taken
"const struct dirent **", some systems (many) have declared
it instead as taking "const void *". For now, just omit
the types; a pointer to function taking unknown arguments
is a compatible type, and we never call the functions, we
just pass them to something else.
* Handle readlinkat() on systems without *at functions
* Fix pseudo_etc_file (spotted by "fortify")
When O_CREAT can be a flag, 0600 mode is needed. While we're
at it, remove a bogus dummy open.
* Fix mkdtemp()
Was returning the address of the internal buffer rather than the
user-provided buffer. Also fixed a typo in an error message.
* Don't call fgetgrent_r() with a null FILE *.
* A couple of other typo-type fixes.
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Not that it changes anything, but by convention we like to
use NULL, not 0, to express a null pointer.
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Add chroot() and a large number of things needed to make it work.
The list of intercepted calls is large but not exhaustive.
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* Improve makewrappers handling of function pointer arguments.
* Regenerate wrappers when makewrappers is touched.
* Move path resolution from pseudo_client_op into wrapper
functions.
* Eliminate dependency on PATH_MAX.
* Related cleanup, such as tracking CWD better, and using
the tracked value for getcwd().
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Add the -h (help) option to pseudo, and document -h for both
pseudo and pseudolog.
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spotting these.) Check for failed calls to pseudo_prefix_path in
a couple of places, handle failed open of pid file, and make
pseudo_prefix_path robust in the case of a zero-length PSEUDO_PREFIX.
Also, don't try to overwrite the contents of an environment
variable anymore. (The amazing part? None of these have ever
caused a failure.)
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Peter Seebach
Peter Seebach