reuse fhandler_virtual implementation to implement read and lseek.
The output from read(2) is modelled after the output when reading
from an mq file on Linux.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
The POSIX entry points are just wrappers now, calling into
fhandler_mqueue. While at it, eliminate mqi_flags, replace with
standard fhandler nonblocking flag.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
The mq_open call is just a framework now. This patch moves the
entire functionality into fhandler_mqueue. To support standard
OS calls (as on Linux), make fhandler_mqueue a derived class from
fhandler_disk_file and keep the base handle the handle to the
default stream, to allow implementing O_PATH functionlaity as well
as reading from the file and NOT reading binary message queue data.
Implement a standard fhandler_mqueue::open method, allowing, for
instance, to touch a file under /dev/mqueue and if it doesn't exist,
to create a message queue file.
FIXME: This introduces a BAD HACK into path_conv::check, which needs
reviewing.
Keep the posix path intact in the fhandler, and change get_proc_fd_name
accordingly to return only the basename plus leading slash for
/proc/<PID>/fd.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
POSIX message queues will be moved into NTFS streams.
Extend get_nt_native_path to provide a filename suffix which is not
subject to special character transposition, to allow specifying
a colon.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
This encapsulated creation, duplication, and closing of all
Windows objects connected to the message queue in the fhandler.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
The function evaluating correctness of ipc object names was a
bit half-hearted. Fix the tests to follow more closely the
desriptions in the Linux man pages.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
build_fh_dev can take the POSIX object name as parameter anyway,
so use that and drop from mqinfo call.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
Drop creating a unique ID, the queue name itself is already
unique. This allows to move ipc object generation into the
fhandler in the next step.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
So far, the mqd_t type returned a pointer to an allocated
area under the hood. The mutex and event objects attached
to the message queue were implemented as inheritable types.
As unfortunate side effect the HANDLEs to these objects
were inherited by exec'd child processes, even though all
other message queue properties are not inherted, per POSIX.
Fix this by converting an mqd_t to a descriptor, and create a
matching fhandler_mqueue object to handle various aspects of
the message queues inside the fhandler. Especially, create the
IPC objects as non-inheritable and duplicate the HANDLEs as
part of the fixup_after_fork mechanism.
Drop using mmap and create the memory map with NT functions.
This allows to control duplication of handle and mapping in the
forked child process, without the requirement to regenerate the
map in the same spot. It also allows to dup() the descriptor,
as on Linux, albeit this isn't implemented yet.
This patch is the first cut. There's a bit more to do, like
moving more functionality from the POSIX functions into the
fhandler and making sure the mqd_t type can't be used in other
descriptor-related functions willy-nilly.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
The previous patch is accidentally missing the declaration of
IsWow64Process2. Add it belatedly.
Fixes: 1865a41cb383 ("Cygwin: suppress FAST_CWD warnings on ARM64")
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
The old check was insufficient: new insider preview builds of Windows
allow running x86_64 process on ARM64. The IsWow64Process2 function
seems to be the intended way to figure this situation out.
This avoids MAX_PATH-related problems in native tools in case the
virtual drive points to a deep directory
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
Rather than fetching the system Windows directory at dll init time
only on 32 bit, fetch it on all platforms. Store as WCHAR and
UNICODE_STRING. Use where appropriate to simplify code.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
commit 456c3a46386f was only going half-way. It handled symlinks and
junction points as inner path components and made realpath return the
correct path, but it ignored drive letter substitution, i. e., virtual
drives created with, e. g.
subst X: C:\foo\bar
It was also too simple. Just returning an error code from
symlink_info::check puts an unnecessary onus on the symlink evaluation
loop in path_conv::check.
Rework the code to use GetFinalPathNameByHandle, and only do this after
checking the current file for being a symlink failed.
If the final path returned by GetFinalPathNameByHandle is not the same
as the incoming path, replace the incoming path with the POSIXified
final path. This also short-circuits path evaluation, because
path_conv::check doesn't have to recurse over the inner path components
multiple times if all symlinks are of a native type, while still getting
the final path as end result.
Virtual drives are now handled like symlinks. This is a necessary change
from before to make sure virtual drives are handled identically across
different access methods. An example is realpath(1) from coreutils. It
doesn't call readlink(2), but iterates over all path components using
lstat/readlink calls. Both methods should result in the same real path.
Fixes: 456c3a46386f ("path_conv: Try to handle native symlinks more sanely")
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
Converting to automake dropped the former, handwritten tags/ctags
target. This leads to a couple of problems:
- For no good reason the tags file gets written to the builddir
instead of to the srcdir where it's needed.
- `make tags' requires etags to exist, rather than checking if it
exists and skipping it.
- Adding the extra ctags arguments to AM_CTAGSFLAGS still results
in a shortened tags file.
(Temporary?) solution: Revert the old tags/ctags rules and silence
the automake warnings.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
page/swap space name >= 40 or size/used >= 8 leaves no space between fields;
ensure a space after name and add extra tabs after size and used fields;
output appears like Linux 5.8 after changes to mm/swapfile(swap_show);
proc-swaps-space-before.log:
==> /proc/swaps <==
Filename Type Size Used Priority
/mnt/c/pagefile.sys file 11567748292920 0
/mnt/d/pagefile.sys file 12582912205960 0
proc-swaps-space-after.log:
==> /proc/swaps <==
Filename Type Size Used Priority
/mnt/c/pagefile.sys file 11567748 241024 0
/mnt/d/pagefile.sys file 12582912 182928 0
_mq_send as well as _mq_receive call ipc_mutex_unlock twice in case
of success, after having introduced __try/__except blocks.
Fixes: 3f3bd10104550 ("* Throughout, use __try/__except/__endtry blocks, rather than myfault handler.")
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
POSIX requires that message priorities range from 0 (low) to
sysconf(_SC_MQ_PRIO_MAX) - 1 (high). Cygwin's mq_send erroneously
allowed a message priority of sysconf(_SC_MQ_PRIO_MAX). Fix it.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
Specify toollibdir and toolincludedir in terms of tooldir, so the
install location is correct if tooldir is the default
($(exec_prefix)/$(target_alias)), or explicitly specified on the 'make'
command line.
Linux 5.12 Frozen Wasteland added features and changes:
add AMD 0x8000000a EDX:20 v_spec_ctrl virtual speculation control support
add Intel 0x00000007 ECX:24 bus_lock_detect bus lock detect debug exception
v2:
* Include tzmap.h in BUILT_SOURCES
* Make per-file flags appear after user-supplied CXXFLAGS, so they can
override optimization level.
* Correct .o files used to define symbols exported by libm.a
* Drop gcrt0.o mistakenly included in libgmon.a
* Add missing line continuations in GMON_FILES value
v3:
* use per-file flags for .c compilation
* override C{XX,}FLAGS, as they are set on the command line by top-level make
v4:
* Drop -Wno-error=write-strings from path_testsuite CXXFLAGS
v5:
* Update for changes in master
- Add -fno-threadsafe-statics to CXX flags
- Add hypotl.cc
- Remove fenv.cc (in favour of newlib), add fenv.c stub
- Add proc.5 manpage rules
Following POSIX and Linux, allow a connected DGRAM socket's connection
to be reset (so that the socket becomes unconnected). This is done by
calling connect and specifing an address whose family is AF_UNSPEC.
When connect is called on a DGRAM socket, the call to Winsock's
connect can immediately return successfully rather than failing with
WSAEWOULDBLOCK. Set the connect state to "connected" in this case.
Previously the connect state remained "connect_pending" after the
successful connection.
- In commit bb93c6d7, the race issue was not completely fixed. In
the pseudo console inheritance, if the destination process to
which the ownership of pseudo console switches, is found but exits
before switching, the inheritance fails. Currently, this extremely
rarely happens. This patch fixes the issue.
Commit 456c3a46386f added a workaround when handling paths with native
symlinks as inner path components. This patch introduced a problem for
paths handled by the WOW64 File System Redirector (FSR).
Fix this problem by not performing the new code from commit 456c3a46386f
for paths under the Windows directory. Only do this in WOW64.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
