Even for the main executable and cygwin1.dll store the file name as full
NT path. Create the child process using the main executable's file name
converted from the full NT path stored before.
* dll_init.cc (dll_list::alloc): Search for DLL_SELF type entry
with module name like for DLL_LINK, use full NT path to search
for DLL_LOAD type only. For DLL_SELF type do not indicate
having a destructor to be called.
(dll_list::find): Ignore DLL_SELF type entries.
(dll_list::init): Ditto. Call track_self method.
(dll_list::track_self): New.
(dll_list::load_after_fork): Call track_self method.
* dll_init.h (enum dll_type): Add DLL_SELF, for the main
executable and cygwin1.dll.
(struct dll_list): Declare private method track_self. Declare
member variable main_executable.
* fork.cc (frok::parent): Use ntname from dlls.main_executable
to create child process, converted to short path using
dll_list::buffered_shortname.
Store loaded dll's file name as full NT path.
* dll_init.h (struct dll): Rename member variable name to ntname.
(struct dll_list): Declare private static member variable
nt_max_path_buffer. Declare public static methods form_ntname,
form_shortname. Define public static methods nt_max_path_buf,
buffered_shortname.
(dll_list::operator []): Use PCWCHAR rather than const PWCHAR.
(dll_list::find_by_modname): Ditto.
* dll_init.cc (in_load_after_fork): Define earlier in file.
(struct dll_list): Rename member variable name to ntname.
Define nt_max_path_buffer variable.
Implement static methods form_ntname, form_shortname.
(dll_list::operator []): Use PCWCHAR rather than const PWCHAR.
(dll_list::find_by_modname): Ditto.
(reserve_at): Ditto.
(release_at): Ditto.
(dll_list::alloc): Use nt_max_path_buf method instead of local
buffer. Store module file name as full NT path, convert using
the form_ntname static method.
(dll_list::load_after_fork): Call load_after_fork_impl only when
reload_on_fork is set.
* fork.cc (frok::child): Call dlls.load_after_fork even without
need to dynamically load dlls.
(frok::parent): Move syscall_printf into the retry loop.
Trying to delete in-use executables and DLLs using
FILE_DISPOSITION_POSIX_SEMANTICS returns STATUS_CANNOT_DELETE.
Fall back to the former method if that error occurs to allow
unlinking these files.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
The symlink target of /proc/PID/fd files pointing to pipes and
sockets are just artificial filenames referencing the object using
some internal number. The pipe open code expects a path specifying
process pid and the internal number so it access the right process
and pipe.
- Set the posix path of the pipe to the simple pipe name only,
as it shows up in /proc/PID/fd. A /proc/self prefix is just
as wrong as a /dev/fd prefix.
- Revert thinko in fhandler_pipe::open expecting the name as
/proc/self/fd/... In fact this should never happen.
- Fix up the path before re-opening the pipe instead.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
The reopen code neglected to pass along the requested open
mode correctly. This may end up reopening the file with
incorrect access mask, or duplicating the wrong pipe handle.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
Move TerminateProcess call into cleanup code to make sure child
doesn't linger in some border cases.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
When fork finally fails although both CreateProcess and creating the
"cygpid.N" shared memory section succeeded, we have to release that
shared memory section as well - before releasing the process handle.
Otherways we leave an orphan "cygpid.N" shared memory section, and any
subsequent cygwin process receiving the same PID fails to initialize.
* fork.cc (frok::parent): Call child.allow_remove in cleanup code.
- If the execve'ed process is a non-Cygwin process, we have to
create the matching winpid symlink and remove the old one
ourselves.
- If we spawn a child, the winpid symlink has to be maintained
by the child process, otherwise it disappears if the parent
process exits.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
The arguments are not used anyway, so drop them. When called,
procinfo->dwProcessId is already set right, so we don't have
to access myself_initial.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
This may end up killing the wrong process. Only allow Cygwin PID.
Slightly clean up code: Remove outdated W95 considerations. Fix
a bug in commandline argument processing.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
Since commit b5e1003722, native
Windows processes not started by Cygwin processes don't have a
Cygwin PID anymore. This breaks ps -W and kill -f <WINPID>.
Introduce MAX_PID (65536 for now).
Cygwin processes as well as native Windows processes started
from a Cygwin process get a PID < MAX_PID. All other native
Windows processes get a faked Cygwin PID >= MAX_PID.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
Using the Windows PID as Cygwin PID has a few drawbacks:
- the PIDs on Windows get reused quickly. Some POSIX applications choke
on that, so we need extra code to avoid too quick PID reuse.
- The code to avoid PID reuse keeps parent process handles and
(depending on a build option) child processes open unnecessarily.
- After an execve, the process has a split personality: Its Windows PID
is a new PID, while its Cygwin PID is the PID of the execve caller
process. This requires to keep two procinfo shared sections open, the
second just to redirect process info requests to the first, correct
one.
This patch changes the way Cygwin PIDs are generated:
- Cygwin PIDs are generated independently of the Windows PID, in a way
expected by POSIX processes. The PIDs are created incrementally in
the range between 2 and 65535, round-robin.
- On startup of the first Cygwin process, choose a semi-random start PID
for the first process in the lower PID range to make the PIDs slightly
unpredictable. This may not be necessary but it seems kind of inviting
to know that the first Cygwin process always starts with PID 2.
- Every process not only creates the shared procinfo section, but also a
symlink in the NT namespace, symlinking the Windows PID to the Cygwin
PID. This drops the need for the extra procinfo section after execve.
- Don't keep other process handles around unnecessarily.
- Simplify the code creating/opening the shared procinfo section and
make a clear distinction between interfaces getting a Cygwin PID and
interfaces getting a Windows PID.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
If a process is just exiting, requesting memory info may fail
with STATUS_PROCESS_IS_TERMINATING. Right now the code just bails
out if fetching mem info fails. However, the rest of the info is
still valuable for procps, so just carry on.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
After creating a pthread, the stack gets moved to the desired memory
location. While the 32 bit thread wrapper copies the exception handler
information to the new stack (so we have at least *some* exception
handler present), the x86_64 code didn't perform any exception handler
magic. Fix that.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
VirtualQueryEx, called by fixup_mmaps_after_fork, requires
PROCESS_QUERY_INFORMATION permissions per MSDN. However, testing
shows that PROCESS_QUERY_LIMITED_INFORMATION is sufficient when
running the same code on Windows 8.1 or Windows 10. Fix the code
to give the forked child always PROCESS_QUERY_INFORMATION perms
on Windows Vista/7 and respective server releases.
Revert now unneeded patch to check_token_membership as well.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
POSIX requires that raise(3) is equivalent to
pthread_kill(pthread_self(), sig);
in multi-threaded applications. Our raise just called kill(sig).
Fix that.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
Keeping an inheritable handle open results in that handle being
spilled over into grandchild processes, which is not desired.
Duplicate original parent handle into a non-inheritable one with
minimal SYNCHRONIZE permissions and close the original handle.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
- Exec'ed/spawned processes don't need PROCESS_DUP_HANDLE. Remove that
permission from the parent handle.
- PROCESS_QUERY_LIMITED_INFORMATION doesn't work for Windows 7 if the
process is started as a service. Add PROCESS_QUERY_INFORMATION for
pre-Windows 8 in that case.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
The version info only depends on the object files. This results
in the version info not being rebuild immediately if a source
file is changed. Rather, the version info is only rebuilt on the
next make run.
Fix that by making the version info build rule dependent on the
source files.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
- This simple and official method replaces cyglsa and "create token"
methods. No network share access, same as before.
- lsaauth and create_token are disabled now. If problems crop up,
they can be easily reactivated. If no problems crop up, they
can be removed in a while, together with the lsaauth subdir.
- Bump Cygwin version to 3.0.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
The previous patch failed with password-less auth because in
that case the return code from get_server_groups wasn't tested.
Fix that. Also make sure that get_server_groups does not
check if the account is disabled or locked out when just fetching
the group list for initgroups or getgrouplist.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
So far seteuid could change uid to any existing account, given
sufficient permissions of the caller. This is kind of bad since
it disallows admins to refuse login to disabled or locked out
accounts.
Add check for the account's UF_ACCOUNTDISABLE or UF_LOCKOUT flags
and don't let the user in, if one of the flags is set.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
Use info from same source (GetNetworkParams).
Also move getdomainname near gethostname in source.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
If gethostname() fails we call GetComputerNameEx with
ComputerNameDnsFullyQualified. This is wrong, gethostname should return
the hostname only, not the FQDN. Fix this by calling GetComputerNameEx
with ComputerNameDnsHostname.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
When reusing a cygthread, the stub method fails to set the thread name
to the new name. The name is only set when actually creating the
thread. Fix that by moving the SetThreadName call right in front of the
thread function call.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
Combine with a bit of cleanup:
- Drop overrun_event_running in favor of overrun_count being -1.
- Fix include guard in posix_timer.h.
- Drop ununsed function timespec_to_us.
- Don't use Interlocked functions without need.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
Allocating on the cygheap would copy information of the tracker into
the child process. A forked child knows the timer id and could simply
still access the (free'd but still valid) timer_tracker on the heap,
which is dangerous and very certainly doesn't reflect POSIX semantics.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
Michael Haubenwallner
Corinna Vinschen
Jozef Lawrynowicz