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Private functions were previously declared
- in header files in the root directory
- in public headers guarded with IN_LIBXML
- in libxml.h
- redundantly in source files that used them.
Consolidate all private header files in include/private.
From what I can tell, some really early Cygwin versions from around
1998-2000 used to erroneously define _WIN32. This was eventually fixed,
but these days, the `defined(_WIN32) && !defined(__CYGWIN__)` idiom is
unnecessary.
Now, we only check for __CYGWIN__ in xmlexports.h when deciding whether
to use __declspec.
Found by running the fuzz/uri.c fuzzer under asan (internal Android bug
171610679).
Always free `ret` when exiting on failure. I've moved the definition of
NULLCHK down past where ret is always initialized to make it clear that
this is safe.
This patch also fixes the indentation of two of the NULLCHK call sites
to make it more obvious that NULLCHK isn't `if`-like.
Raised by Matthias Pigulla <mp@webfactory.de>
In a nutshell we had that bug on URI composition after some fixes in
the area of localhost empty shortcuts :
./testURI --base file:///some/where file
Without patch: file:/some/file
With patch: file:///some/file
If the relative URI started with './', the 'pos' index was increased
which also affected indexing into the base path. Aside from producing
wrong results, this could also lead to a heap overread of the base
path buffer. The data read from beyond the buffer was only compared
to some char values, so this is mostly harmless.
Inside libxml2, xmlBuildRelativeURI is only called from xinclude.c.
Found with libFuzzer and ASan.
For https://bugzilla.gnome.org/show_bug.cgi?id=765566
in xmlParse3986Port(), uri->port can overflow when parsing a the port number.
The type of uri->port is int, so the consequent behavior is undefined and
may differ between compilers and architectures
As written by Martin Kletzander <mkletzan@redhat.com>:
Since commit 8eb55d782a, when you parse
and save an URI that has no server (or similar) part, two slashes
after the 'schema:' get lost. It means 'uri:///noserver' is turned
into 'uri:/noserver'.
basically
foo:///only/path
means a host of "" while
foo:/only/path
means no host at all
So the best fix IMHO is to fix the URI parser to record the first
case and an empty host string and the second case as a NULL host string
I would not revert the initial patch, we should not 'invent' those
slash, but we should instead when parsing keep the information that
it's a host based path and that foo:/// means the presence of a host
but an empty one.
Once applied the resulting patch below, all cases seems to be saved
properly:
thinkpad:~/XML -> ./testURI uri:/noserver
uri:/noserver
thinkpad:~/XML -> ./testURI uri:///noserver
uri:///noserver
thinkpad:~/XML -> ./testURI uri://server/foo
uri://server/foo
thinkpad:~/XML -> ./testURI uri:/noserver/foo
uri:/noserver/foo
thinkpad:~/XML -> ./testURI uri:///
uri:///
thinkpad:~/XML -> ./testURI uri://
uri://
thinkpad:~/XML -> ./testURI uri:/
uri:/
thinkpad:~/XML ->
If you revert the initial patch that last case fails
The problem is that I don't want to change the xmlURI structure to
minimize ABI breakage, so I could not extend the field. The natural
solution is to denote that uri:/// has an empty host by making
the uri server field an empty string which works very well but breaks
applications (like libvirt ;-) who blindly look at uri->server
not being NULL to try to reach it !
Simplest was to stick the port to -1 in that case, instead of 0
application don't bother looking at the port of there is no server
string, this makes the patch more complex than a 1 liner, but
is better for ABI.
For https://bugzilla.gnome.org/show_bug.cgi?id=731063
xmlSaveUri() of libxml2 (snapshot 2014-05-31 and earlier) returns
bogus values when called with URIs that have rootless paths
(e.g. "urx🅱️b" becomes "urx://b%3Ab" where "urx:b%3Ab" would be
correct)
so we've got this patch to libxml2 2.7.6 in the LibreOffice code base,
inherited from OOo. it fixes a definite problem, which is that Windows
has a rather low maximum path length restriction, and there is a special
trick on NT whereby path names can be prefixed with "\\?\", in which
case the maximum length is 32k, which ought to be sufficient even for
bloated office suites :)
I'll attach the patch to the xmlCanonicPath function. note that i
didn't write this and am by no means an expert on either Microsoftean
platforms or libxml so maybe it's not the best way to do it.
* uri.c: cleanup the code doing the allocations, set up a structured
error handler to report memory errors, and set up an abitrary
limit on URI saving size
* error.c include/libxml/xmlerror.h: add a new FROM_URI indication
for structured error reporting, also adding strings for schematron
and buffer which were missing
clang recently grew a warning on `for (...);`. This patch
fixes all two instances of this pattern in libxml. The changes
don't modify the code semantic.
* uri.c: Ralf Junker pointed out that URI with no path
like http://www.domain.com when parsed ended up with an
empty path value instead of NULL, this fixes the problem
* HTMLparser.c c14n.c debugXML.c entities.c nanohttp.c parser.c
testC14N.c uri.c xmlcatalog.c xmllint.c xmlregexp.c xpath.c:
fix unused variables, or unneeded increments as well as a couple
of space issues
* runtest.c: check for NULL before calling unlink()
* uri.c: allow [ and ] in fragment identifiers, 3986 disallow them
but it's widely used for XPointer, and would break DocBook
processing among others
Daniel
svn path=/trunk/; revision=3765
* uri.c include/libxml/uri.h: rewrite the URI parser to update to
rfc3986 (from 2396)
* test/errors/webdav.xml result/errors/webdav.xml*: removed the
error test, 'DAV:' is a correct URI under 3986
* Makefile.am: small cleanup in make check
Daniel
svn path=/trunk/; revision=3763
* uri.c: applied patch from Ashwin fixing a number of realloc problems
* HTMLparser.c: improve handling for misplaced html/head/body
Daniel
svn path=/trunk/; revision=3740
* uri.c include/libxml/uri.h: add a new function xmlPathToUri()
to provide a clean conversion when setting up a base
* SAX2.c tree.c: use said function when setting up doc->URL
or using the xmlSetBase function. Should fix#346261
Daniel
* test/relaxng/docbook_0.xml: get rid of the dependancy on a locally
installed DTD
* uri.c include/libxml/uri.h xmlIO.c nanoftp.c nanohttp.c: try to
cleanup the Path/URI conversion mess, needed fixing in various
layers and a new API to the uri module which also fixes#306861
* runtest.c: integrated a regression test specific to check the
URI conversions done before calling the I/O handlers.
Daniel
* doc/apibuild.py doc/elfgcchack.xsl: revamped the elfgcchack.h
format to cope with gcc4 change of aliasing allowed scopes, had
to add extra informations to doc/libxml2-api.xml to separate
the header from the c module source.
* *.c: updated all c library files to add a #define bottom_xxx
and reimport elfgcchack.h thereafter, and a bit of cleanups.
* doc//* testapi.c: regenerated when rebuilding the API
Daniel
