| Commit message (Collapse) | Author | Age | Files | Lines |
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This patch adds the following three functions:
bits_to_bytes(bits) - the number of bytes needed to hold 'bits'
bytes_to_int32(bytes) - the number of 4-byte units to hold 'bytes'
pad_to_int32(bytes) - the closest multiple of 4 equal to or larger than
'bytes'.
All three operations are common in protocol processing and currently the
server has ((foo + 7)/8 + 3)/4 operations all over the place. A common set
of functions reduce the error rate of these (albeit simple) calculations and
improve readability of the code.
The functions do not check for overflow.
v2: backport to nx-libs 3.6.x as a prereq for
the CVE-2015-0255 fix (Mike DePaulo)
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
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v2: backport to nx-libs 3.6.x as a prereq for
the CVE-2015-0255 fix (Mike DePaulo)
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This feature copies the way how X.Org version string and number
are propagated at build time.
First use case: if people start nxagent, it reports its version number
on stderr. This is about being human-friendly.
Second use case: None, so far. But it will now be easy to use
the NXAGENT_VERSION_STRING in later feature add-ons.
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GetHosts() iterates over all the hosts it has in memory, and copies
them to a buffer. The buffer length is calculated by iterating over
all the hosts and adding up all of their combined length. There is a
potential integer overflow, if there are lots and lots of hosts (with
a combined length of > ~4 gig). This should be possible by repeatedly
calling ProcChangeHosts() on 64bit machines with enough memory.
This patch caps the list at 1mb, because multi-megabyte hostname
lists for X access control are insane.
v2: backport to nx-libs 3.6.x (Mike DePaulo)
v3: human-readable version of "1 MB" (Mihai Moldovan)
Reported-by: Ilja Van Sprundel <ivansprundel@ioactive.com>
Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
Conflicts:
os/access.c
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This reverts commit d4c76981f7fddb364166464c571ed8d3de3086cd.
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v2: Handle more multiplies in indirect_reqsize.c (Julien Cristau)
v3: RHEL5 backport
v4: backport to nx-libs 3.6.x (Mike DePaulo)
Reviewed-by: Julien Cristau <jcristau@debian.org>
Reviewed-by: Michal Srb <msrb@suse.com>
Reviewed-by: Andy Ritger <aritger@nvidia.com>
Signed-off-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Signed-off-by: Fedora X Ninjas <x@fedoraproject.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>
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This is a half-measure until we start passing request length into the
varsize function, but it's better than the nothing we had before.
v2: Verify that there's at least a large render header's worth of
dataBytes (Julien Cristau)
v3: backport to RHEL5
v4: backport to nx-libs 3.6.x (Mike DePaulo)
Reviewed-by: Michal Srb <msrb@suse.com>
Reviewed-by: Andy Ritger <aritger@nvidia.com>
Signed-off-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Signed-off-by: Fedora X Ninjas <x@fedoraproject.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>
fixup swap
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v2:
Fix single versus vendor-private length checking for ARB_imaging subset
extensions. (Julien Cristau)
v3:
Fix single versus vendor-private length checking for ARB_imaging subset
extensions. (Julien Cristau)
v4: backport to nx-libs 3.6.x (Mike DePaulo)
Reviewed-by: Michal Srb <msrb@suse.com>
Reviewed-by: Andy Ritger <aritger@nvidia.com>
Signed-off-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Julien Cristau <jcristau@debian.org>
Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Signed-off-by: Fedora X Ninjas <x@fedoraproject.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>
fix safe_Add
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[CVE-2014-8098 4/8]
v2: backport to nx-libs 3.6.x (Mike DePaulo)
Reviewed-by: Keith Packard <keithp@keithp.com>
Reviewed-by: Julien Cristau <jcristau@debian.org>
Reviewed-by: Michal Srb <msrb@suse.com>
Reviewed-by: Andy Ritger <aritger@nvidia.com>
Signed-off-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Signed-off-by: Fedora X Ninjas <x@fedoraproject.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>
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[CVE-2014-8093 5/6]
v2:
Fix constants in __glXMap2fReqSize (Michal Srb)
Validate w/h/d for proxy targets too (Keith Packard)
v3:
Fix Map[12]Size to correctly reject order == 0 (Julien Cristau)
v4: backport to nx-libs 3.6.x (Mike DePaulo)
Reviewed-by: Keith Packard <keithp@keithp.com>
Reviewed-by: Michal Srb <msrb@suse.com>
Reviewed-by: Andy Ritger <aritger@nvidia.com>
Signed-off-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Signed-off-by: Fedora X Ninjas <x@fedoraproject.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>
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v2:
Remove can't-happen comparison for cmdlen < 0 (Michal Srb)
v3: backport to RHEL5 hit old paths
v4: backport to nx-libs 3.6.x (Mike DePaulo)
Reviewed-by: Adam Jackson <ajax@redhat.com>
Reviewed-by: Michal Srb <msrb@suse.com>
Reviewed-by: Andy Ritger <aritger@nvidia.com>
Signed-off-by: Julien Cristau <jcristau@debian.org>
Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Signed-off-by: Fedora X Ninjas <x@fedoraproject.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>
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These are paranoid about integer overflow, and will return -1 if their
operation would overflow a (signed) integer or if either argument is
negative.
Note that RenderLarge requests are sized with a uint32_t so in principle
this could be sketchy there, but dix limits bigreqs to 128M so you
shouldn't ever notice, and honestly if you're sending more than 2G of
rendering commands you're already doing something very wrong.
v2: Use INT_MAX for consistency with the rest of the server (jcristau)
v3: Reject negative arguments (anholt)
v4: RHEL5: add limits.h, use inline
v5: backport to nx-libs 3.6.x (Mike DePaulo)
Reviewed-by: Keith Packard <keithp@keithp.com>
Reviewed-by: Julien Cristau <jcristau@debian.org>
Reviewed-by: Michal Srb <msrb@suse.com>
Reviewed-by: Andy Ritger <aritger@nvidia.com>
Signed-off-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Signed-off-by: Fedora X Ninjas <x@fedoraproject.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>
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(v2) [CVE-2014-8093 3/6]
If the computed reply size is negative, something went wrong, treat it
as an error.
v2: Be more careful about size_t being unsigned (Matthieu Herrb)
v3: SIZE_MAX not SIZE_T_MAX (Alan Coopersmith)
v4: backport to nx-libs 3.6.x (Mike DePaulo)
Reviewed-by: Julien Cristau <jcristau@debian.org>
Reviewed-by: Michal Srb <msrb@suse.com>
Reviewed-by: Andy Ritger <aritger@nvidia.com>
Signed-off-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Signed-off-by: Fedora X Ninjas <x@fedoraproject.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>
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Before this we'd just clamp the image size to 0, which was just
hideously stupid; if the parameters were such that they'd overflow an
integer, you'd allocate a small buffer, then pass huge values into (say)
ReadPixels, and now you're scribbling over arbitrary server memory.
v2: backport to nx-libs 3.6.x (Mike DePaulo)
Reviewed-by: Keith Packard <keithp@keithp.com>
Reviewed-by: Julien Cristau <jcristau@debian.org>
Reviewed-by: Michal Srb <msrb@suse.com>
Reviewed-by: Andy Ritger <aritger@nvidia.com>
Signed-off-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Signed-off-by: Fedora X Ninjas <x@fedoraproject.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>
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If the size computation routine returns -1 we should just reject the
request outright. Clamping it to zero could give an attacker the
opportunity to also mangle cmdlen in such a way that the subsequent
length check passes, and the request would get executed, thus passing
data we wanted to reject to the renderer.
v3: backport to nx-libs 3.6.x (Mike DePaulo)
v2: backport to RHEL5 - fix swap paths
Reviewed-by: Keith Packard <keithp@keithp.com>
Reviewed-by: Julien Cristau <jcristau@debian.org>
Reviewed-by: Michal Srb <msrb@suse.com>
Reviewed-by: Andy Ritger <aritger@nvidia.com>
Signed-off-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Signed-off-by: Fedora X Ninjas <x@fedoraproject.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>
fixup swaps
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v2: backport to nx-libs 3.6.x (Mike DePaulo)
Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
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Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
v2: backport to nx-libs 3.6.x (Mike DePaulo)
Conflicts:
xfixes/select.c
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v2: backport to nx-libs 3.6.x (Mike DePaulo)
Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
Conflicts:
render/render.c
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Otherwise we may be reading outside of the client request.
v2: backport to nx-libs 3.6.x (Mike DePaulo)
Signed-off-by: Julien Cristau <jcristau@debian.org>
Reviewed-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Conflicts:
render/render.c
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v2: backport to nx-libs 3.6.x (Mike DePaulo)
Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
Conflicts:
Xext/xvdisp.c
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v2: backport to nx-libs 3.6.x (Mike DePaulo)
Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
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Multiple functions in the Xinput extension handling of requests from
clients failed to check that the length of the request sent by the
client was large enough to perform all the required operations and
thus could read or write to memory outside the bounds of the request
buffer.
This commit includes the creation of a new REQUEST_AT_LEAST_EXTRA_SIZE
macro in include/dix.h for the common case of needing to ensure a
request is large enough to include both the request itself and a
minimum amount of extra data following the request header.
v2: backport to nx-libs 3.6.x (Mike DePaulo)
Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
Conflicts:
Xi/chgdctl.c
Xi/chgfctl.c
Xi/xiallowev.c
Xi/xichangecursor.c
Xi/xichangehierarchy.c
Xi/xigetclientpointer.c
Xi/xigrabdev.c
Xi/xipassivegrab.c
Xi/xiproperty.c
Xi/xiquerydevice.c
Xi/xiquerypointer.c
Xi/xiselectev.c
Xi/xisetclientpointer.c
Xi/xisetdevfocus.c
Xi/xiwarppointer.c
[RHEL5: Xi/xi* files are XI2 ]
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ProcDbeSwapBuffers() has a 32bit (n) length value that it uses to read
from a buffer. The length is never validated, which can lead to out of
bound reads, and possibly returning the data read from out of bounds to
the misbehaving client via an X Error packet.
SProcDbeSwapBuffers() swaps data (for correct endianness) before
handing it off to the real proc. While doing the swapping, the
length field is not validated, which can cause memory corruption.
v2: reorder checks to avoid compilers optimizing out checks for overflow
that happen after we'd already have done the overflowing multiplications.
v3: backport to nx-libs 3.6.x (Mike DePaulo)
Reported-by: Ilja Van Sprundel <ivansprundel@ioactive.com>
Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
Conflicts:
dbe/dbe.c
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Force use of 64-bit integers when evaluating data provided by clients
in 32-bit fields which can overflow when added or multiplied during
checks.
Reported-by: Ilja Van Sprundel <ivansprundel@ioactive.com>
Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
RHEL5: add #include <stdint.h> for uint64_t
v3: backport to nx-libs 3.6.x (Mike DePaulo)
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RegionSizeof contains several integer overflows if a large length
value is passed in. Once we fix it to return 0 on overflow, we
also have to fix the callers to handle this error condition
v2: Fixed limit calculation in RegionSizeof as pointed out by jcristau.
v3: backport to nx-libs 3.6.x (Mike DePaulo)
Reported-by: Ilja Van Sprundel <ivansprundel@ioactive.com>
Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Julien Cristau <jcristau@debian.org>
Conflicts:
dix/region.c
include/regionstr.h
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GetHosts() iterates over all the hosts it has in memory, and copies
them to a buffer. The buffer length is calculated by iterating over
all the hosts and adding up all of their combined length. There is a
potential integer overflow, if there are lots and lots of hosts (with
a combined length of > ~4 gig). This should be possible by repeatedly
calling ProcChangeHosts() on 64bit machines with enough memory.
This patch caps the list at 1mb, because multi-megabyte hostname
lists for X access control are insane.
v2: backport to nx-libs 3.6.x (Mike DePaulo)
Reported-by: Ilja Van Sprundel <ivansprundel@ioactive.com>
Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
Conflicts:
os/access.c
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ProcPutImage() calculates a length field from a width, left pad and depth
specified by the client (if the specified format is XYPixmap).
The calculations for the total amount of memory the server needs for the
pixmap can overflow a 32-bit number, causing out-of-bounds memory writes
on 32-bit systems (since the length is stored in a long int variable).
v2: backport to nx-libs 3.6.x (Mike DePaulo)
Reported-by: Ilja Van Sprundel <ivansprundel@ioactive.com>
Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
Conflicts:
dix/dispatch.c
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authdes_ezdecode() calls malloc() using a length provided by the
connection handshake sent by a newly connected client in order
to authenticate to the server, so should be treated as untrusted.
It didn't check if malloc() failed before writing to the newly
allocated buffer, so could lead to a server crash if the server
fails to allocate memory (up to UINT16_MAX bytes, since the len
field is a CARD16 in the X protocol).
Reported-by: Ilja Van Sprundel <ivansprundel@ioactive.com>
Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
Conflicts:
os/rpcauth.c
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xorg/Xserver http://lists.x.org/archives/xorg-announce/2013-October/002332.html
Save a pointer to the passed in closure structure before copying it
and overwriting the *c pointer to point to our copy instead of the
original. If we hit an error, once we free(c), reset c to point to
the original structure before jumping to the cleanup code that
references *c.
Since one of the errors being checked for is whether the server was
able to malloc(c->nChars * itemSize), the client can potentially pass
a number of characters chosen to cause the malloc to fail and the
error path to be taken, resulting in the read from freed memory.
Since the memory is accessed almost immediately afterwards, and the
X server is mostly single threaded, the odds of the free memory having
invalid contents are low with most malloc implementations when not using
memory debugging features, but some allocators will definitely overwrite
the memory there, leading to a likely crash.
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commit 6ba44b91e37622ef8c146d8f2ac92d708a18ed34
use O_NOFOLLOW to open the existing lock file, so symbolic links
aren't followed, thus avoid revealing if it point to an existing
file.
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nx*/VERSION and hw/nxagent/VERSION.
This commit removes the debian/VERSION file at makes it now unnecessary to
copy/symlink the VERSION file at build time. These build scripts got adapted:
debian/roll-tarballs.sh
debian/rules
nx-libs.spec
Furthermore, all NX component now use the main VERSION file as reference.
typechange: nxcomp/VERSION
typechange: nxcompext/VERSION
typechange: nxcompshad/VERSION
typechange: nxproxy/VERSION
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(999_nxagent_unbrand-nxagent-brand-x2goagent.full.patch).
When launched with NX Agent flavour, the startup screen gets unbranded by
this patch (the !M logo does not get shown).
When launched with X2Go Agent flavour, the startup screen gets branded
with the X2GO logo.
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(990_fix-DEBUG-and-TEST-builds.full.patch).
(1) In nx-X11/programs/Xserver/dix:
Fix several compile errors when specifying -DDEBUG globally. Previous GCC
versions were more liberal and the code thus compiled.
Also initialize/reset a count variable correctly.
(2) In nx-X11/programs/Xserver/hw/nxagent/Render.c:
Check for pSrc->pDrawable to exist instead of having nxagent segfault when
it does not.
This enables the possibility of compiling all nxagent modules in TEST mode.
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(606_nx-X11_build-on-aarch64.full.patch).
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(603_nx-X11_compilation_warnings.full.patch).
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relinquishing privileges (602_nx-X11_initgroups.full.patch).
The Fedora review of NX (redistributed) caught the following rpmlint issue:
This executable is calling setuid and setgid without setgroups or initgroups.
There is a high probability this mean it didn't relinquish all groups, and this
would be a potential security issue to be fixed. Seek POS36-C on the web for
details about the problem.
Ref POS36-C:
https://www.securecoding.cert.org/confluence/display/seccode/POS36-C.+Observe+correct+revocation+order+while+relinquishing+privileges
This patch adds initgroups() calls to the code to initialize the supplemental group list.
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(600_nx-X11+nxcompext+nxcompshad_unique-libnames.full.patch).
We really want to make use of rpm's automatic dependency finding.
Binaries are scanned for DT_NEEDED entries, the latter of which are
then used for populating the "Requires"-type deps. The "nxagent"
binary for example would require libX11.so.6. That incurs problems:
1. A package manager told to install nxagent could select xorg-x11
rather than nx-libs, even though nxagent depends on the NX version.
2. A package manager told to install $some_program could select nx-libs
rather than xorg-x11 (since both provide libX11.so.6), but, since
the NX library is in an obscure directory, running $some_program
would fail as libX11.so.6 is not found.
To solve this, give the NX libraries unique names different from the
Xorg ones.
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(321_nxagent_x2go-specific-keystroke-config.full.patch).
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(320_nxagent_configurable-keystrokes.full.patch).
Replaces the hardcoded nxagent keybindings by a configurable
table of keybindings. The default configuration is the same as the
original one, to maintain compatibility. A user/administrator can either
specify a command line parameter, environment variable or place a file
in ~/.nx/config/keystrokes.cfg or /etc/nxagent/keystrokes.cfg to reconfigure
these keybindings.
The configuration file format is XML, a dependency on libxml2 is added
to allow parsing the configuration.
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(302_nx-X11_xkbbasedir-detection.full.patch).
In recent (as of 2014/06) X.org release, the keymap.dir file
has become obsolete. Let's test for the xkb/rules/base file
instead.
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Many distributions have a policy to reduce code duplications.
One means to avoid such duplications is to use shared libraries
instead of using libs that are ofter shipped for convenience.
Fedora:
http://fedoraproject.org/wiki/Packaging:Guidelines#Shared_Libraries
Debian (Section 10.7.4 of Debian policy):
http://www.debian.org/doc/debian-policy/ch-files.html
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Depending on the binary name of the agent either NXAgent
or X2GoAgent is set as WM_Class.
This is needed for some window managers (like the one shipped with
Maemo)
The original WM_CLASS patch has been taken from the FreeNX patch
series, author unknown.
The nxagent/x2goagent has been done by the X2Go Project, author
see below.
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210_nxagent_save_session_state.full.patch
210_nxcomp_save_session_state.full+lite.patch
This patch adds a "state" option to NX (agent) which
allows one to specify a file where nxagent will write
its session state into.
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(207_nxagent_fix-xfixes-selection.full.patch).
When nxagent has the XFIXES extension enabled copy and
paste from outside applications to applications within the session
that rely on XFixesSelectSelectionInput (e.g. qt applications like
konsole) did never receive any notifications because the nxagent did
not register itself at the real X server to receive them. Fixes X2Go Bug
#585 (http://bugs.x2go.org/585).
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(206_nxagent_clipboard-as-nxoption.full.patch).
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(205_nxagent_refresh-adsl.full.patch).
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(204_nxagent_repaint-solidpict.full.patch).
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(203_nxagent_disable-rootless-exit.full.patch).
This change enables to launch an nxagent in rootless mode
that waits forever for Xclients to appear.
This feature got added when X2Go introduced Published Applications
support.
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