If newfile already exists and is in use, trying to overwrite it with
NtSetInformationFile(FileRenameInformation) fails exactly as if we
don't have the permissions to delete it. Unfortunately the return code
is the same STATUS_ACCESS_DENIED, so we have no way to distinguish
these cases. What we do here so far is to start a transaction to delete
newfile. If this open fails with a transactional error we stop the
transaction and retry opening the file without transaction.
But, here's the problem: If newfile is in use, NtOpenFile(oldfile)
naturally does NOT fail with a transactional error. Rather, the
subsequent call to unlink_nt(newfile) does, because there's another
handle open to newfile outside a transaction. However, the code does
not check if unlink_nt fails with a transactional error and so fails
to retry without transaction.
This patch recifies the problem and checks unlink_nt's status as well.
Refactor code to get rid of goto into another code block.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
A *very* recent Windows build adds more code to the preamble of
RtlGetCurrentDirectory_U() so that the previous heuristic failed to find
the call to the locking routine.
This only affects the 64-bit version of ntdll, where the 0xe8 byte is
now found at offset 40, not the 32-bit version. However, let's just
double the area we search for said byte for good measure.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Returns the process's environment concatenated into a single block of
null-terminated strings, along with the length of the environment block.
Adds an associated PICOM_ENVIRON commune_process handler.
win32env_to_cygwenv handles converting wchar to char and some other
minor taks. Optionally it handles converting any paths in variables to
posix paths.
This will be useful for implementing /proc/<pid>/environ
commit 67fd2101 introduced a bad bug. Changing sys_privs to a static
area and just returning a pointer is nice... *if* the calling code doesn't
call free() on it. Make sure callers check pointer for sys_privs and
refrain from calling free, if so.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
Include ntsecapi.h where required and just redefine RtlGenRandom
correctly in the ntsecapi.h wrapper.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
In preparation of exporting getentropy/getrandom to userspace, rearrange
code a bit:
- Define RtlGenRandom in ntdll.h.
- Drop calls to getentropy in favor of RtlGenRandom (fhandler_socket,
fhandler_dev_random).
- Add try/except blocks in fhandler_dev_random to return EFAULT rather
than crashing if buffer pointer is invalid.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
NtOpenFile/NtCreateFile on non-existent paths on network drives has a
bug. Assuming a path Z:\dir\file. Further assuming that Z:\dir does
not exist.
The first NtOpenFile("Z:\dir\file") correctly returns
STATUS_OBJECT_PATH_NOT_FOUND. Subsequent calls incorrectly
return STATUS_OBJECT_NAME_NOT_FOUND.
This appears to be some kind of caching behaviour. Waiting a while
before repeating the call correctly returns STATUS_OBJECT_PATH_NOT_FOUND
again.
This patch works around the observed misbehaviour.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
So far, when converting from POSIX to Windows notation, cygwin_conv_path
fails to check for .exe suffix, so /path/foo did not return /path/foo.exe
even if this file exists.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
The original code only skipped the "./", but missed to test if more
trailing slashes are present. This in turn leads to invalid conversion.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
Don't allow signal 0 in signal(2), sigaction(2), siginterrupt(3).
Don't allow any signal in sigqueue(3) but explicitely handle
signal 0 as in kill(2).
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
Provide <memory.h> for all standard Newlib targets and remove
Cygwin-specific header. Most POSIX like systems provide this historic
header.
Signed-off-by: Sebastian Huber <sebastian.huber@embedded-brains.de>
This makes it possible provide operating system specific types for
<pthread.h>. It is in line with the FreeBSD header file structure and
allows a future cleanup of <pthread.h> to not expose unrelated things
via <sys/types.h> and <unistd.h>. Glibc uses the similar
<bits/pthreadtypes.h> for this purpose.
Signed-off-by: Sebastian Huber <sebastian.huber@embedded-brains.de>
Update the getconf utility to support the new flag as well as
_PC_POSIX_PERMISSIONS and _PC_POSIX_SECURITY. These were previously
unsupported, probably as an oversight.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
Additionally to eccefd97, we need to ensure the exception handler is
installed for the _ljfault used to implement _try/_except to get called.
Also use the correct macro for x86 conditional compilation.
Addresses https://cygwin.com/ml/cygwin/2016-09/msg00143.html
Signed-off-by: Jon Turney <jon.turney@dronecode.org.uk>
Long-standing problem in one of the corner cases of rename(2):
If we rename a directory a check is performed to see if newpath is
identical to oldpath or a subdir of oldpath. This check is
(accidentally? no hints anywhere in ChangeLogs or code) performed
case-insensitive for as long as we use Unicode paths and NT functions.
This leads to the problems described in
https://cygwin.com/ml/cygwin/2016-09/msg00264.html
Change this to be conditional case-sensitive as all other checks but
let's take this with a grain of salt. There may be corner-cases in
this corner-case which require to chek parts of the path always
case-insensitive. Off the top of my head I can't construct such a
case but that's no proof they don't exist :}
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
Commit d16a5630 dropped usage of cygheap's locale functions
in favor of local on-the-fly usage of UTF-8 instead of ASCII.
This allowed to use the current local rather than a fixed
system-wide locale set at startup time. d16a5630 just missed
to add the ASCII->UTF-8 conversion in the console as well.
Fixes https://cygwin.com/ml/cygwin/2016-10/msg00000.html
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
On 09/02/2016 11:03 AM, Corinna Vinschen wrote:
> On Sep 2 10:46, Michael Haubenwallner wrote:
>> On 09/01/2016 03:32 PM, Corinna Vinschen wrote:
>>> You could just use the global variable program_invocation_name. If in
>>> doubt, use the Windows path global_progname and convert it to full POSIX
>>> via cygwin_conv_path.
>>
>> Patch updated, using global_progname now.
>
> Looks good and you're right to do it this way since I just noticed
> that program_invocation_name may return a relative pathname.
Yep.
> Btw., in other calls which require the full POSIX path we use
> mount_table->conv_to_posix_path instead of cygwin_conv_path (see
> e. g. fillout_pinfo()). It's a bit faster. Maybe something for a
> followup patch.
No problem - attached.
This renders the original patch 4/4 valid again.
> Note for some later improvement: I really wonder why we don't store
> the absolute POSIX path of the current executable globally yet...
Same here.
Thanks!
/haubi/
>From f7255edd33cb4abe34f27188aab8dccdfa5dd2a0 Mon Sep 17 00:00:00 2001
From: Michael Haubenwallner <michael.haubenwallner@ssi-schaefer.com>
Date: Wed, 31 Aug 2016 18:05:11 +0200
Subject: [PATCH 3/4] dlopen: on x/lib search x/bin if exe is in x/bin
citing https://cygwin.com/ml/cygwin-developers/2016-08/msg00020.html
> Consider the file /usr/bin/cygz.dll:
> - dlopen (libz.so) success
> - dlopen (/usr/bin/libz.so) success
> - dlopen (/usr/lib/libz.so) fails
* dlfcn.c (dlopen): For dlopen("x/lib/N"), when the application
executable is in "x/bin/", search for "x/bin/N" before "x/lib/N".
Rather than searching all search dirs per one basename,
search for all basenames within per one search dir.
pathfinder.h (check_path_access): Interchange dir- and basename-loops.
Instead of find_exec, without changing behaviour use new pathfinder
class with new allocator_interface around tmp_pathbuf and new vstrlist
class.
* pathfinder.h (pathfinder): New file.
* vstrlist.h (allocator_interface, allocated_type, vstrlist): New file.
* dlfcn.cc (dlopen): Avoid redundant GetModuleHandleExW with RTLD_NOLOAD
and RTLD_NODELETE. Switch to new pathfinder class, using
(tmp_pathbuf_allocator): New class.
(get_full_path_of_dll): Drop.
On Windows 8.1 and later, the NetUserChangePassword call apparently
doesn't accept the usual "\\server" string anymore, but requires to
use the "domain" instead, otherwise it emits en error code 1265,
ERROR_DOWNGRADE_DETECTED. Since this is accepted by pre-8.1 as well,
use the domain indiscriminately when calling NetUserChangePassword
from passwd(1).
While at it, do some minor cleanup in passwd.c.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
Keep __ctype_ptr__ available on Cygwin only, for backward compatibility
with existing apps referencing it via the ctype macros.
Otherwise initialize __global_locale.ctype_ptr and __C_locale.ctype_ptr
and use them throughout.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
Wrap SetThreadName()'s call to RaiseException() in __try/__except/__endtry,
so that if the attached debugger doesn't know about MS_VC_EXCEPTION (e.g.
current gdb and probably strace as well) and continues exception processing,
we ignore it, rather than dying due an unhandled exception.
Also remove an unnecessary cast in the RaiseException() invocation.
Signed-off-by: Jon Turney <jon.turney@dronecode.org.uk>
Corinna Vinschen
Johannes Schindelin
Erik M. Bray
Sebastian Huber
Ken Brown
Jon Turney
Michael Haubenwallner
Yaakov Selkowitz