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2002-02-28 Robert Collins <rbtcollins@hotmail.com>

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* Merged cygwin_daemon into head minus the new shm and ipc exports.

2002-02-28  Robert Collins  <rbtcollins@hotmail.com>

	* fhandler_tty.cc (fhandler_tty_slave::open): More debugging.
	(fhandler_tty_slave::read): Fix printf type for the handle.
	* tty.cc (tty::common_init): Add a FIXME for security.

2002-01-29  Robert Collins  <rbtcollins@hotmail.com>

	* Makefile.in (OBJS): Remove duplicate localtime.o.

2002-01-17  Robert Collins  <rbtcollins@hotmail.com>

	* cygserver.cc (check_and_dup_handle): Consolidate the two variants for
	simplicity.
	Add Some basic debug output.
	(client_request_attach_tty::serve): Use the new debug_printf for clarity.
	Mark the duplicated handles as inheritable - fixup_after_fork() doesn't reopen
	tty's.

2002-01-16  Robert Collins  <rbtcollins@hotmail.com>

	* cygserver.cc (transport): Correct scope.
	(client_request_attach_tty::serve): Add more debug information.
	Fix erroneous use of transport instead of conn.
	* cygserver_transport_pipes.cc (transport_layer_pipes::close): More debug.
	(transport_layer_pipes::read): Ditto.
	(transport_layer_pipes::write): Ditto.
	(transport_layer_pipes::impersonate_client): Ditto.

Mon Oct  8  7:41:00 2001  Robert Collins <rbtcollins@hotmail.com>

	* cygserver.cc (server_request::process): Rename client_request_shm_get to
	client_request_shm.
	* cygserver_process.cc (process_cache::add): Rename to add_task.
	Use process_cleanup instead of process_request.
	(process_cache::remove_process): New method.
	(process::process): Initialize new members.
	(process::~process): New member.
	(process::cleanup): New method.
	(process::add_cleanup_routine): New method.
	(process_request::process): Rename to process_cleanup.
	Call the process object's cleanup method and then delete it.
	(process_process_param::request_loop): Remove the signalling process.
	* cygserver_shm.cc: Globally rename client_request_shm_get to client_request_shm.
	(client_request_shm_get::serve): Handle attach request counting.
	* cygserver_shm.h: Globally rename client_request_shm_get to client_request_shm.
	(class shm_cleanup): New class.
	* shm.cc: Globally rename client_request_shm_get to client_request_shm.
	(client_request_shm::client_request_shm): New constructor for attach requests.
	(shmat): Use it.
	* include/cygwin/cygserver_process.h (class process_request): Rename to
	process_cleanup.
	(class cleanup_routine): New class.
	(class process): New members and methods to allow calling back when the process
	terminates.

Thu Oct  4 14:12:00 2001  Robert Collins <rbtcollins@hotmail.com>
	* cygserver.cc (request_loop): Make static.
	(main): Use new cache constructor syntax.
	Start cache worker threads.
	Cleanup the cache at shutdown.
	* cygserver_process.cc: Run indent.
	(process_cache::process_cache): Add a trigger to use when adding a process.
	(process_cache::process): Move process_entry to process.
	Insert at the end of the list.
	Trigger the request loop when new process's inserted.
	(process_cache::process_requests): Do it.
	(process_cache::add): New method.
	(process_cache::handle_snapshot): New method.
	(process::process): Merge in the process_entry fields.
	(process::handle): Make a stub function.
	(process::exit_code): New method.
	(process_request::process): New method.
	(process_process_param::request_loop): New method.
	* cygserver_shm.cc: New header dependency - threaded_queue.h.
	* threaded_queue.cc (threaded_queue::cleanup): Clearer messages.
	(queue_process_param::stop): Short spinlock on interruptible threads.
	* threaded_queue.h (class threaded_queue): New constructor.
	* include/cygwin/cygserver_process.h (process_request): New class.
	(process_entry): Remove.
	(process): Merge in process_entry.
	(process_cache): Inherit from threaded_queue.

Tue Oct  2 23:24:00 2001  Robert Collins <rbtcollins@hotmail.com>

	* cygserver.cc (class server_process_param): Use new constructor syntax.
	* cygserver_process.cc (process_cache::~process_cache): New function.
	* threaded_queue.cc: Define condition debug_printf.
	Run indent.
	(threaded_queue::cleanup): Move queue_process_param guts to a method.
	(threaded_queue::process_requests): Ditto.
	(queue_process_param::queue_process_param): New method.
	(queue_process_param::~queue_process_param): Ditto.
	(queue_process_param::start): Ditto.
	(queue_process_param::stop): Ditto.
	* threaded_queue.h (class queue_process_param): Add support for
	interruptible request loops.
	* cygwin/include/cygwin/cygserver_process.h (class process_cache): Add
	destructor.

Tue Oct  2 23:24:00 2001  Robert Collins <rbtcollins@hotmail.com>

	* cygserver_client.cc: New flag allow_daemon to disable the daemon completely.
	(cygserver_request): Check it.
	(cygserver_init): Ditto.
	* environ.cc (parse_thing): Add (no)daemon option.

Tue Oct  2 23:00:00 2001  Robert Collins <rbtcollins@hotmail.com>

	* shm.cc: Update to handle include changes from HEAD.

Tue Oct  2 16:06:00 2001  Robert Collins <rbtcollins@hotmail.com>

	* Makefile.in: Remove cygserver_shm.o from cygwin1.dll.
	Rename cygserver_shm_outside.o to cygserver_shm.o.
	* cygserver.cc (server_request::process): Use the new client_request
	constructor.
	* cygserver_client.cc: Remove the #ifdef's stubs for the server method
	within cygwin.
	(client_request_attach_tty::client_request_attach_tty): Use the new
	client_request constructor.
	(client_request_shutdown::client_request_shutdown): Ditto.
	(client_request::client_request): Ditto.
	* cygserver_shm.cc (client_request_shm_get::serve): Remove the
	#ifdef'd stub for in-cygwin builds.
	(client_request_shm_get::client_request_shm_get): Use the new
	client_request constructor, and remove the in-cygwin variants.
	* cygserver_shm.h (class client_request_shm_get): #ifndef test the
	serve method - it's only used in cygserver.
	* shm.cc (client_request_shm_get::client_request_shm_get): New function.
	* include/cygwin/cygserver.h (request_header): New constructor.
	(class client_request): Use it.
	New constructor accepting the header size.
	#ifndef test the server method - it's only used within cygserver.
	(client_request_get_version): #ifdef test the server method.
	(client_request_shutdown): Ditto.
	(client_request_attach_tty): Ditto.

Tue Oct  2  9:57:00 2001  Robert Collins <rbtcollins@hotmail.com>

	* Makefile.in: add threaded_queue.o to cygserver.exe.
	* cygserver.cc: Include threaded_queue.h
	(class server_request): Inherit from queue_request.
	(class server_process_param): Inherit from queue_process_param.
	(class server_request_queue): Inherit from threaded_queue.
	(request_loop): Adjust for new types.
	(server_request_queue::process_requests): Remove guts to
	threaded_queue::process_requests.
	(server_request::server_request): Adjust for new types.
	(worker_function): Delete.
	(server_request_queue::create_workers): Delete.
	(server_request_queue::cleanup): Delete.
	(server_request_queue::add): Move guts to threaded_queue::add.
	* threaded_queue.cc: New file.
	* threaded_queue.h: New file.

Mon Oct  1 12:38:00 2001  Robert Collins <rbtcollins@hotmail.com>

	* cygserver.cc (client_request::serve): New function.
	* cygserver_process.cc: Inlude <pthread.h> for pthread_once.
	(process_cache::process_cache): Initialise a crtiical section for write access.
	(process_cache::process): Use the critical section. Also add missing entries to
	the cache.
	(do_process_init): New function to initalise class process static variables.
	(process::process): Ensure that the process access critical section is
	initialised.
	(process::handle): Close the handle of old process's when they have terminated
	and we are returning the handle for a process with the same pid.
	* cygserver_shm.cc: Run indent.
	Include cygserver_process.h to allow process cache functionality.
	(client_request_shm_get::serve): New parameter for process cache support.
	Use the process cache, not OpenProcess to get a handle to the originating process.
	Fix a handle leak with token_handle.
	* cygserver_shm.h (class client_request_shm_get): Update ::serve for process
	cache support.
	* cygserver_transport_pipes.cc: Redefine debug_printf to be conditional on DEBUG.
	* include/cygwin/cygserver.h: Do not implement client_request::serve in the
	header.
	* include/cygwin/cygserver_process.h (class process_cache): Add a write access
	critical section to prevent races when requests from a  multithreaded
	application arrive.

Sun Sep 30 23:41:00 2001  Robert Collins <rbtcollins@hotmail.com>

	* Makefile.in: Add cygserver_process.o to cygserver.exe.
	* cygserver.cc: Include signal.h and cygwin_version.h.
	Define debug_printf as a macro.
	Define DEBUG to a value.
	(client_request_attach_tty::serve): Add beginning of process cache support.
	Change from #ifdef DEBUG to work with new DEBUG style.
	(client_request_get_version::serve): Add beginning of process cache support.
	(class server_request): New prototype for support of process cache.
	(class queue_process_param): New class to allow request loop threading.
	(class server_request_queue): Add beginning of process cache support.
	Allow request loop threading.
	(request_loop): Thread function for request loops.
	(server_request_queue::process_requests): Initiator for threaded request loops.
	(client_request_shutdown::serve): Add beginning of process cache support.
	(server_request::server_request): Ditto.
	(server_request::process): Use debug_printf. Add beginning of process cache
	support.
	(server_request_queue::cleanup): Kill off any request loop threads.
	(server_request_queue::add): Add beginning of process cache support.
	(handle_signal): Trigger a shutdown.
	(main): Print out some useful info at startup - version, date time.
	Add process cache support.
	Spawn a separate thread for the transport request loop, thus allowing concurrent
	support for multiple transports.
	* cygserver_client.cc (client_request_get_version::serve): Add process cache
	support.
	(client_request_attach_tty::serve): Add process cache support.
	(client_request_shutdown::serve): Add process cache support.
	* cygsserver_process.cc: New file with the process cache support.
	* cygserver_shm.cc: Redefine debug_printf to allow conditional output.
	* cygwin.din: Export shmdt().
	* shm.cc: Run indent.
	Update FIXME's.
	(shmdt): New function.
	* include/cygwin/cygserver.h (class client_request): Add process cache support.
	(class client_request_get_version): Ditto.
	(class client_request_shutdown): Ditto.
	(class client_request_attach_tty): Ditto.
	* include/cygwin/cygserver_process.h: New header for process cache support.

Sun Sep 30  8:52:00 2001  Robert Collins <rbtcollins@hotmail.com>

	* include/cygwin/cygserver_transport.h: Add copyright header.
	* include/cygwin/cygserver_transport_pipes.h: Ditto.
	* include/cygwin/cygserver_transport_sockets.h: Ditto.

Sat Sep 29 20:40:00 2001  Robert Collins <rbtcollins@hotmail.com>

	* Makefile.in: Add cygserver_transport_sockets.o to DLL_OFILES.
	Add cygserver_transport_sockets_outside.o to cygserver.exe.
	* cygserver.cc: Include new include files.
	* cygserver_client.cc: Ditto.
	* cygserver_shm.h: No need to include <sys/socket.h> now.
	* cygerver_transport.cc: Include new include files.
	(transport_layer_base::transport_layer_base): Strip back to a stub.
	(transport_layer_base::listen): Ditto.
	(transport_layer_base::accept): Ditto.
	(transport_layer_base::close): Ditto.
	(transport_layer_base::read): Ditto.
	(transport_layer_base::write): Ditto.
	(transport_layer_base::connect): Ditto.
	* cygserver_transport_pipes.cc: Include new header
	"cygwin/cygserver_transport_pipes.h".
	* cygserver_transport_sockets.cc: New file.
	* dcrt0.cc: No need to include <sys/socket.h> now.
	* fhandler_tty.cc: Ditto.
	* tty.cc: Ditto.
	* include/cygwin/cygserver_transport.h: Strip the base class to a stub.
	Remove the cygserver_transport_pipes class.
	* include/cygwin/cygserver_transport_pipes.h: New file.
	* include/cygwin/cygserver_transport_sockets.h: New file.

Tue Sep 25 16:22:00 2001  Robert Collins <rbtcollins@hotmail.com>

	* autoload.cc: Add dynamic load statement for 'ImpersonateNamedPipeClient'.
	* Makefile.in: Add new object files, and build instructions for cygserver.exe.
	* cygwin.din: Export ftok, shmat, shmctl and shmget.
	* dcrt0.cc: Additional includes for cygserver support.
	(dll_crt0_1): Initialise the cygserver client.
	* fhandler.h (fhandler_tty): New method cygserver_attach_tty.
	* fhandler_tty.cc: Additional includes for cygserver support.
	(fhandler_tty_slave::open): Attempt to use the cygserver when obtaining
	handles from the parent process. On failure or 9x use the current method.
	(fhandler_tty_slave::cygserver_attach_tty): New function.
	* fork.cc (fork_child): Fixup shm memory mapped areas.
	* pinfo.h: Declare fixup_shms_after_fork().
	* security.h: Declare alloc_sd().
	* tty.cc: Additonal includes to support cygserver.
	(tty::common_init): Don't allow others to open us if the cygserver is running.
	* winsup.h: Declare cygserver_running.
	* cygserver.cc: New file.
	* cygserver_client.cc: New file.
	* cygserver_shm.cc: New file.
	* cygserver_shm.h: New file.
	* cygserver_transport.cc: New file.
	* cygserver_transport_pipes.cc: New file.
	* ipc.cc: New file.
	* shm.cc: New file.
	* include/cygwin/cygserver.h: New file.
	* include/cygwin/cygserver_transport.h: New file.
	* include/sys/ipc.h: New file.
	* include/sys/shm.h: New file.

2002-02-28  Robert Collins  <rbtcollins@hotmail.com>

	* thread.cc (semaphore::TryWait): Set errno as required by posix 1003.1.
	(__sem_wait): Ditto.
	(__sem_trywait): Ditto.
This commit is contained in:
Robert Collins
2002-02-28 14:30:38 +00:00
parent 062401c9b4
commit f449bfef40
41 changed files with 6453 additions and 59 deletions
Download Patch File Download Diff File Expand all files Collapse all files

207
winsup/cygserver/client.cc Normal file
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@@ -0,0 +1,207 @@
/* cygserver_client.cc
Copyright 2001 Red Hat Inc.
Written by Egor Duda <deo@logos-m.ru>
This file is part of Cygwin.
This software is a copyrighted work licensed under the terms of the
Cygwin license. Please consult the file "CYGWIN_LICENSE" for
details. */
#ifdef __OUTSIDE_CYGWIN__
#undef __INSIDE_CYGWIN__
#else
#include "winsup.h"
#endif
#ifndef __INSIDE_CYGWIN__
#define debug_printf printf
#define api_fatal printf
#include <stdio.h>
#include <windows.h>
#endif
#include <sys/socket.h>
#include <errno.h>
#include <unistd.h>
//#include "security.h"
#include "cygwin/cygserver_transport.h"
#include "cygwin/cygserver_transport_pipes.h"
#include "cygwin/cygserver_transport_sockets.h"
#include "cygwin/cygserver.h"
/* 0 = untested, 1 = running, 2 = dead */
int cygserver_running=CYGSERVER_UNKNOWN;
/* on by default during development. For release, we probably want off by default */
int allow_daemon = TRUE;
client_request_get_version::client_request_get_version () : client_request (CYGSERVER_REQUEST_GET_VERSION, sizeof (version))
{
buffer = (char *)&version;
}
client_request_attach_tty::client_request_attach_tty () : client_request (CYGSERVER_REQUEST_ATTACH_TTY, sizeof (req))
{
buffer = (char *)&req;
req.pid = 0;
req.master_pid = 0;
req.from_master = NULL;
req.to_master = NULL;
}
client_request_attach_tty::client_request_attach_tty (DWORD npid, DWORD nmaster_pid, HANDLE nfrom_master, HANDLE nto_master) : client_request (CYGSERVER_REQUEST_ATTACH_TTY, sizeof (req))
{
buffer = (char *)&req;
req.pid = npid;
req.master_pid = nmaster_pid;
req.from_master = nfrom_master;
req.to_master = nto_master;
}
client_request_shutdown::client_request_shutdown () : client_request (CYGSERVER_REQUEST_SHUTDOWN, 0)
{
buffer = NULL;
}
client_request::client_request (cygserver_request_code id, ssize_t buffer_size) : header (id, buffer_size)
{
}
client_request::~client_request ()
{
}
client_request::operator class request_header ()
{
return header;
}
void
client_request::send (transport_layer_base *conn)
{
if (!conn)
return;
debug_printf("this=%p, conn=%p\n",this, conn);
ssize_t bytes_written, bytes_read;
debug_printf("header.cb = %ld\n",header.cb);
if ((bytes_written = conn->write ((char *)&header, sizeof (header)))
!= sizeof(header) || (header.cb &&
(bytes_written = conn->write (buffer, header.cb)) != header.cb))
{
header.error_code = -1;
debug_printf ("bytes written != request size\n");
return;
}
debug_printf("Sent request, size (%ld)\n",bytes_written);
if ((bytes_read = conn->read ((char *)&header, sizeof (header)))
!= sizeof (header) || (header.cb &&
(bytes_read = conn->read (buffer, header.cb) ) != header.cb))
{
header.error_code = -1;
debug_printf("failed reading response \n");
return;
}
debug_printf ("completed ok\n");
}
/* Oh, BTW: Fix the procedural basis and make this more intuitive. */
int
cygserver_request (client_request * req)
{
class transport_layer_base *transport;
if (!req || allow_daemon != TRUE)
return -1;
/* dont' retry every request if the server's not there */
if (cygserver_running==CYGSERVER_DEAD && req->header.req_id != CYGSERVER_REQUEST_GET_VERSION)
return -1;
transport = create_server_transport ();
/* FIXME: have at most one connection per thread. use TLS to store the details */
/* logic is:
* if not tlskey->conn, new conn,
* then; transport=conn;
*/
if (!transport->connect ())
{
delete transport;
return -1;
}
debug_printf ("connected to server %p\n", transport);
req->send(transport);
transport->close ();
delete transport;
return 0;
}
#if 0
BOOL
check_cygserver_available ()
{
BOOL ret_val = FALSE;
HANDLE pipe = CreateFile (pipe_name,
GENERIC_READ | GENERIC_WRITE,
FILE_SHARE_READ | FILE_SHARE_WRITE,
&sec_all_nih,
OPEN_EXISTING,
0,
NULL);
if (pipe != INVALID_HANDLE_VALUE || GetLastError () != ERROR_PIPE_BUSY)
ret_val = TRUE;
if (pipe && pipe != INVALID_HANDLE_VALUE)
CloseHandle (pipe);
return (ret_val);
}
#endif
void
cygserver_init ()
{
int rc;
if (allow_daemon != TRUE)
{
cygserver_running = CYGSERVER_DEAD;
return;
}
if (cygserver_running==CYGSERVER_OK)
return;
client_request_get_version *req =
new client_request_get_version ();
rc = cygserver_request (req);
delete req;
if (rc < 0)
cygserver_running = CYGSERVER_DEAD;
else if (rc > 0)
api_fatal ( "error connecting to cygwin server. error: %d", rc );
else if (req->version.major != CYGWIN_SERVER_VERSION_MAJOR ||
req->version.api != CYGWIN_SERVER_VERSION_API ||
req->version.minor > CYGWIN_SERVER_VERSION_MINOR)
api_fatal ( "incompatible version of cygwin server.\n\
client version %d.%d.%d.%d, server version%ld.%ld.%ld.%ld",
CYGWIN_SERVER_VERSION_MAJOR,
CYGWIN_SERVER_VERSION_API,
CYGWIN_SERVER_VERSION_MINOR,
CYGWIN_SERVER_VERSION_PATCH,
req->version.major,
req->version.api,
req->version.minor,
req->version.patch );
else
cygserver_running = CYGSERVER_OK;
}

548
winsup/cygserver/cygserver.cc Normal file
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@@ -0,0 +1,548 @@
/* cygserver.cc
Copyright 2001 Red Hat Inc.
Written by Egor Duda <deo@logos-m.ru>
This file is part of Cygwin.
This software is a copyrighted work licensed under the terms of the
Cygwin license. Please consult the file "CYGWIN_LICENSE" for
details. */
#include <errno.h>
#include <stdio.h>
#include <unistd.h>
#include <windows.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netdb.h>
#include <signal.h>
#include "wincap.h"
#include "cygwin_version.h"
#include "getopt.h"
#include "cygwin/cygserver_transport.h"
#include "cygwin/cygserver_transport_pipes.h"
#include "cygwin/cygserver_transport_sockets.h"
#include "threaded_queue.h"
#include "cygwin/cygserver_process.h"
#include "cygwin/cygserver.h"
#include "cygserver_shm.h"
/* for quieter operation, set to 0 */
#define DEBUG 0
#define debug_printf if (DEBUG) printf
GENERIC_MAPPING access_mapping;
static class transport_layer_base *transport;
DWORD request_count = 0;
BOOL
setup_privileges ()
{
BOOL rc, ret_val;
HANDLE hToken = NULL;
TOKEN_PRIVILEGES sPrivileges;
rc = OpenProcessToken ( GetCurrentProcess() , TOKEN_ALL_ACCESS , &hToken ) ;
if ( !rc )
{
printf ( "error opening process token (%lu)\n", GetLastError () );
ret_val = FALSE;
goto out;
}
rc = LookupPrivilegeValue ( NULL, SE_DEBUG_NAME, &sPrivileges.Privileges[0].Luid );
if ( !rc )
{
printf ( "error getting prigilege luid (%lu)\n", GetLastError () );
ret_val = FALSE;
goto out;
}
sPrivileges.PrivilegeCount = 1 ;
sPrivileges.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED ;
rc = AdjustTokenPrivileges ( hToken, FALSE, &sPrivileges, 0, NULL, NULL ) ;
if ( !rc )
{
printf ( "error adjusting prigilege level. (%lu)\n", GetLastError () );
ret_val = FALSE;
goto out;
}
access_mapping.GenericRead = FILE_READ_DATA;
access_mapping.GenericWrite = FILE_WRITE_DATA;
access_mapping.GenericExecute = 0;
access_mapping.GenericAll = FILE_READ_DATA | FILE_WRITE_DATA;
ret_val = TRUE;
out:
CloseHandle ( hToken );
return ret_val;
}
int
check_and_dup_handle (HANDLE from_process, HANDLE to_process,
HANDLE from_process_token,
DWORD access,
HANDLE from_handle,
HANDLE* to_handle_ptr, BOOL bInheritHandle = FALSE)
{
HANDLE local_handle = NULL;
int ret_val = EACCES;
char sd_buf [1024];
PSECURITY_DESCRIPTOR sd = (PSECURITY_DESCRIPTOR) &sd_buf;
DWORD bytes_needed;
PRIVILEGE_SET ps;
DWORD ps_len = sizeof (ps);
BOOL status;
if (from_process != GetCurrentProcess ())
{
if (!DuplicateHandle (from_process, from_handle,
GetCurrentProcess (), &local_handle,
0, bInheritHandle,
DUPLICATE_SAME_ACCESS))
{
printf ( "error getting handle(%u) to server (%lu)\n", (unsigned int)from_handle, GetLastError ());
goto out;
}
} else
local_handle = from_handle;
if (!GetKernelObjectSecurity (local_handle,
OWNER_SECURITY_INFORMATION | GROUP_SECURITY_INFORMATION | DACL_SECURITY_INFORMATION,
sd, sizeof (sd_buf), &bytes_needed))
{
printf ( "error getting handle SD (%lu)\n", GetLastError ());
goto out;
}
MapGenericMask (&access, &access_mapping);
if (!AccessCheck (sd, from_process_token, access, &access_mapping,
&ps, &ps_len, &access, &status))
{
printf ( "error checking access rights (%lu)\n", GetLastError ());
goto out;
}
if (!status)
{
printf ( "access to object denied\n");
goto out;
}
if (!DuplicateHandle (from_process, from_handle,
to_process, to_handle_ptr,
access, bInheritHandle, 0))
{
printf ( "error getting handle to client (%lu)\n", GetLastError ());
goto out;
}
debug_printf ("Duplicated %p to %p\n", from_handle, *to_handle_ptr);
ret_val = 0;
out:
if (local_handle && from_process != GetCurrentProcess ())
CloseHandle (local_handle);
return (ret_val);
}
void
client_request::serve (transport_layer_base *conn, class process_cache *cache)
{
printf ("*****************************************\n"
"A call to the base client_request class has occured\n"
"This indicates a mismatch in a virtual function definition somewhere\n");
exit (1);
}
void
client_request_attach_tty::serve(transport_layer_base *conn, class process_cache *cache)
{
HANDLE from_process_handle = NULL;
HANDLE to_process_handle = NULL;
HANDLE token_handle = NULL;
DWORD rc;
if (header.cb != sizeof (req))
{
header.error_code = EINVAL;
return;
}
debug_printf ("pid %ld:(%p,%p) -> pid %ld\n", req.master_pid,
req.from_master, req.to_master,
req.pid);
debug_printf ("opening process %ld\n", req.master_pid);
from_process_handle = OpenProcess (PROCESS_DUP_HANDLE, FALSE, req.master_pid);
debug_printf ("opening process %ld\n", req.pid);
to_process_handle = OpenProcess (PROCESS_DUP_HANDLE, FALSE, req.pid);
if (!from_process_handle || !to_process_handle)
{
printf ("error opening process (%lu)\n", GetLastError ());
header.error_code = EACCES;
goto out;
}
debug_printf ("Impersonating client\n");
conn->impersonate_client ();
debug_printf ("about to open thread token\n");
rc = OpenThreadToken (GetCurrentThread (),
TOKEN_QUERY,
TRUE,
&token_handle);
debug_printf ("opened thread token, rc=%lu\n", rc);
conn->revert_to_self ();
if (!rc)
{
printf ("error opening thread token (%lu)\n", GetLastError ());
header.error_code = EACCES;
goto out;
}
if (check_and_dup_handle (from_process_handle, to_process_handle,
token_handle,
GENERIC_READ,
req.from_master,
&req.from_master, TRUE) != 0)
{
printf ("error duplicating from_master handle (%lu)\n", GetLastError ());
header.error_code = EACCES;
goto out;
}
if (req.to_master)
{
if (check_and_dup_handle (from_process_handle, to_process_handle,
token_handle,
GENERIC_WRITE,
req.to_master,
&req.to_master, TRUE) != 0)
{
printf ("error duplicating to_master handle (%lu)\n", GetLastError ());
header.error_code = EACCES;
goto out;
}
}
#if DEBUG
printf ("%ld -> %ld(%p,%p)\n", req.master_pid, req.pid,
req.from_master, req.to_master);
#endif
header.error_code = 0;
out:
if (from_process_handle)
CloseHandle (from_process_handle);
if (to_process_handle)
CloseHandle (to_process_handle);
if (token_handle)
CloseHandle (token_handle);
}
void
client_request_get_version::serve(transport_layer_base *conn, class process_cache *cache)
{
if (header.cb != sizeof (version))
{
header.error_code = EINVAL;
return;
}
header.error_code = 0;
version.major = CYGWIN_SERVER_VERSION_MAJOR;
version.api = CYGWIN_SERVER_VERSION_API;
version.minor = CYGWIN_SERVER_VERSION_MINOR;
version.patch = CYGWIN_SERVER_VERSION_PATCH;
}
class server_request : public queue_request
{
public:
server_request (transport_layer_base *newconn, class process_cache *newcache);
virtual void process ();
private:
char request_buffer [MAX_REQUEST_SIZE];
transport_layer_base *conn;
class process_cache *cache;
};
class server_process_param : public queue_process_param
{
public:
transport_layer_base *transport;
server_process_param () : queue_process_param (false) {};
};
class server_request_queue : public threaded_queue
{
public:
class process_cache *cache;
void process_requests (transport_layer_base *transport);
virtual void add (transport_layer_base *conn);
};
class server_request_queue request_queue;
static DWORD WINAPI
request_loop (LPVOID LpParam)
{
class server_process_param *params = (server_process_param *) LpParam;
class server_request_queue *queue = (server_request_queue *) params->queue;
class transport_layer_base * transport = params->transport;
while (queue->active)
{
transport_layer_base * new_conn = transport->accept ();
/* FIXME: this is a little ugly. What we really want is to wait on two objects:
* one for the pipe/socket, and one for being told to shutdown. Otherwise
* this will stay a problem (we won't actually shutdown until the request
* _AFTER_ the shutdown request. And sending ourselves a request is ugly
*/
if (new_conn && queue->active)
queue->add (new_conn);
}
return 0;
}
/* TODO: check we are not being asked to service a already serviced transport */
void
server_request_queue::process_requests (transport_layer_base *transport)
{
class server_process_param *params = new server_process_param;
params->transport = transport;
threaded_queue::process_requests (params, request_loop);
}
void
client_request_shutdown::serve (transport_layer_base *conn, class process_cache *cache)
{
/* FIXME: link upwards, and then this becomes a trivial method call to
* only shutdown _this queue_
*/
/* tell the main thread to shutdown */
request_queue.active=false;
}
server_request::server_request (transport_layer_base *newconn, class process_cache *newcache)
{
conn = newconn;
cache = newcache;
}
void
server_request::process ()
{
ssize_t bytes_read, bytes_written;
struct request_header* req_ptr = (struct request_header*) &request_buffer;
client_request *req = NULL;
debug_printf ("about to read\n");
bytes_read = conn->read (request_buffer, sizeof (struct request_header));
if (bytes_read != sizeof (struct request_header))
{
printf ("error reading from connection (%lu)\n", GetLastError ());
goto out;
}
debug_printf ("got header (%ld)\n", bytes_read);
switch (req_ptr->req_id)
{
case CYGSERVER_REQUEST_GET_VERSION:
req = new client_request_get_version (); break;
case CYGSERVER_REQUEST_ATTACH_TTY:
req = new client_request_attach_tty (); break;
case CYGSERVER_REQUEST_SHUTDOWN:
req = new client_request_shutdown (); break;
case CYGSERVER_REQUEST_SHM_GET:
req = new client_request_shm (); break;
default:
req = new client_request (CYGSERVER_REQUEST_INVALID, 0);
req->header.error_code = ENOSYS;
debug_printf ("Bad client request - returning ENOSYS\n");
}
if (req->header.cb != req_ptr->cb)
{
debug_printf ("Mismatch in request buffer sizes\n");
goto out;
}
if (req->header.cb)
{
bytes_read = conn->read (req->buffer, req->header.cb);
if (bytes_read != req->header.cb)
{
debug_printf ("error reading from connection (%lu)\n", GetLastError ());
goto out;
}
debug_printf ("got body (%ld)\n",bytes_read);
}
/* this is not allowed to fail. We must return ENOSYS at a minimum to the client */
req->serve (conn, cache);
if ((bytes_written = conn->write ((char *)&req->header, sizeof (req->header)))
!= sizeof(req->header) || (req->header.cb &&
(bytes_written = conn->write (req->buffer, req->header.cb)) != req->header.cb))
{
req->header.error_code = -1;
printf ("error writing to connection (%lu)\n", GetLastError ());
goto out;
}
debug_printf("Sent reply, size (%ld)\n",bytes_written);
printf (".");
out:
conn->close ();
delete conn;
if (req)
delete (req);
}
void
server_request_queue::add (transport_layer_base *conn)
{
/* safe to not "Try" because workers don't hog this, they wait on the event
*/
/* every derived ::add must enter the section! */
EnterCriticalSection (&queuelock);
if (!running)
{
conn->close ();
delete conn;
LeaveCriticalSection (&queuelock);
return;
}
queue_request * listrequest = new server_request (conn, cache);
threaded_queue::add (listrequest);
LeaveCriticalSection (&queuelock);
}
void
handle_signal (int signal)
{
/* any signal makes us die :} */
/* FIXME: link upwards, and then this becomes a trivial method call to
* only shutdown _this queue_
*/
/* tell the main thread to shutdown */
request_queue.active=false;
}
struct option longopts[] = {
{"shutdown", no_argument, NULL, 's'},
{0, no_argument, NULL, 0}
};
char opts[] = "s";
int
main (int argc, char **argv)
{
int shutdown=0;
char i;
while ((i = getopt_long (argc, argv, opts, longopts, NULL)) != EOF)
switch (i)
{
case 's':
shutdown = 1;
break;
default:
break;
/*NOTREACHED*/
}
wincap.init();
if (wincap.has_security ())
setup_privileges ();
transport = create_server_transport ();
if (shutdown)
{
if (!transport->connect())
{
printf ("couldn't establish connection with server\n");
exit (1);
}
client_request_shutdown *request =
new client_request_shutdown ();
request->send (transport);
transport->close();
delete transport;
delete request;
exit(0);
}
char version[200];
/* Cygwin dll release */
snprintf (version, 200, "%d.%d.%d(%d.%d/%d/%d)-(%d.%d.%d.%d) %s",
cygwin_version.dll_major / 1000,
cygwin_version.dll_major % 1000,
cygwin_version.dll_minor,
cygwin_version.api_major,
cygwin_version.api_minor,
cygwin_version.shared_data,
CYGWIN_SERVER_VERSION_MAJOR,
CYGWIN_SERVER_VERSION_API,
CYGWIN_SERVER_VERSION_MINOR,
CYGWIN_SERVER_VERSION_PATCH,
cygwin_version.mount_registry,
cygwin_version.dll_build_date);
setbuf (stdout, NULL);
printf ("daemon version %s starting up", version);
if (signal (SIGQUIT, handle_signal) == SIG_ERR)
{
printf ("\ncould not install signal handler (%d)- aborting startup\n", errno);
exit (1);
}
printf (".");
transport->listen ();
printf (".");
class process_cache cache (2);
request_queue.initial_workers = 10;
request_queue.cache = &cache;
request_queue.create_workers ();
printf (".");
request_queue.process_requests (transport);
printf (".");
cache.create_workers ();
printf (".");
cache.process_requests ();
printf (".complete\n");
/* TODO: wait on multiple objects - the thread handle for each request loop +
* all the process handles. This should be done by querying the request_queue and
* the process cache for all their handles, and then waiting for (say) 30 seconds.
* after that we recreate the list of handles to wait on, and wait again.
* the point of all this abstraction is that we can trivially server both sockets
* and pipes simply by making a new transport, and then calling
* request_queue.process_requests (transport2);
*/
/* WaitForMultipleObjects abort && request_queue && process_queue && signal
-- if signal event then retrigger it
*/
while (1 && request_queue.active)
{
sleep (1);
}
printf ("\nShutdown request recieved - new requests will be denied\n");
request_queue.cleanup ();
printf ("All pending requests processed\n");
transport->close ();
printf ("No longer accepting requests - cygwin will operate in daemonless mode\n");
cache.cleanup ();
printf ("All outstanding process-cache activities completed\n");
printf ("daemon shutdown\n");
}

389
winsup/cygserver/process.cc Normal file
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/* cygserver_process.cc
Copyright 2001 Red Hat Inc.
Written by Robert Collins <rbtcollins@hotmail.com>
This file is part of Cygwin.
This software is a copyrighted work licensed under the terms of the
Cygwin license. Please consult the file "CYGWIN_LICENSE" for
details. */
#include <errno.h>
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <windows.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netdb.h>
#include "wincap.h"
#include <pthread.h>
#include <threaded_queue.h>
#include <cygwin/cygserver_process.h>
#define debug_printf if (DEBUG) printf
#define DEBUG 1
/* the cache structures and classes are designed for one cache per server process.
* To make multiple process caches, a redesign will be needed
*/
/* process cache */
process_cache::process_cache (unsigned int num_initial_workers):
head (NULL)
{
/* there can only be one */
InitializeCriticalSection (&cache_write_access);
if ((cache_add_trigger = CreateEvent (NULL, FALSE, FALSE, NULL)) == NULL)
{
printf ("Failed to create cache add trigger (%lu), terminating\n",
GetLastError ());
exit (1);
}
initial_workers = num_initial_workers;
}
process_cache::~process_cache ()
{
}
class process *
process_cache::process (long pid)
{
class process *entry = head;
/* TODO: make this more granular, so a search doesn't involve the write lock */
EnterCriticalSection (&cache_write_access);
if (!entry)
{
entry = new class process (pid);
entry->next =
(class process *) InterlockedExchangePointer (&head, entry);
PulseEvent (cache_add_trigger);
}
else
{
while (entry->winpid != pid && entry->next)
entry = entry->next;
if (entry->winpid != pid)
{
class process *new_entry = new class process (pid);
new_entry->next =
(class process *) InterlockedExchangePointer (&entry->next,
new_entry);
entry = new_entry;
PulseEvent (cache_add_trigger);
}
}
LeaveCriticalSection (&cache_write_access);
return entry;
}
static DWORD WINAPI
request_loop (LPVOID LpParam)
{
class process_process_param *params = (process_process_param *) LpParam;
return params->request_loop ();
}
void
process_cache::process_requests ()
{
class process_process_param *params = new process_process_param;
threaded_queue::process_requests (params, request_loop);
}
void
process_cache::add_task (class process * theprocess)
{
/* safe to not "Try" because workers don't hog this, they wait on the event
*/
/* every derived ::add must enter the section! */
EnterCriticalSection (&queuelock);
queue_request *listrequest = new process_cleanup (theprocess);
threaded_queue::add (listrequest);
LeaveCriticalSection (&queuelock);
}
/* NOT fully MT SAFE: must be called by only one thread in a program */
void
process_cache::remove_process (class process *theprocess)
{
class process *entry = head;
/* unlink */
EnterCriticalSection (&cache_write_access);
if (entry == theprocess)
{
entry = (class process *) InterlockedExchangePointer (&head, theprocess->next);
if (entry != theprocess)
{
printf ("Bug encountered, process cache corrupted\n");
exit (1);
}
}
else
{
while (entry->next && entry->next != theprocess)
entry = entry->next;
class process *temp = (class process *) InterlockedExchangePointer (&entry->next, theprocess->next);
if (temp != theprocess)
{
printf ("Bug encountered, process cache corrupted\n");
exit (1);
}
}
LeaveCriticalSection (&cache_write_access);
/* Process any cleanup tasks */
add_task (theprocess);
}
/* copy <= max_copy HANDLEs to dest[], starting at an offset into _our list_ of
* begin_at. (Ie begin_at = 5, the first copied handle is still written to dest[0]
* NOTE: Thread safe, but not thread guaranteed - a newly added process may be missed.
* Who cares - It'll get caught the next time.
*/
int
process_cache::handle_snapshot (HANDLE * hdest, class process ** edest,
ssize_t max_copy, int begin_at)
{
/* TODO:? grab a delete-lock, to prevent deletes during this process ? */
class process *entry = head;
int count = begin_at;
/* skip begin_at entries */
while (entry && count)
{
if (entry->exit_code () == STILL_ACTIVE)
count--;
entry = entry->next;
}
/* hit the end of the list within begin_at entries */
if (count)
return 0;
HANDLE *hto = hdest;
class process **eto = edest;
while (entry && count < max_copy)
{
/* hack */
if (entry->exit_code () == STILL_ACTIVE)
{
*hto = entry->handle ();
*eto = entry;
count++;
hto++;
eto++;
}
entry = entry->next;
}
return count;
}
/* process's */
/* global process crit section */
static CRITICAL_SECTION process_access;
static pthread_once_t process_init;
void
do_process_init (void)
{
InitializeCriticalSection (&process_access);
/* we don't have a cache shutdown capability today */
}
process::process (long pid):
winpid (pid), next (NULL), cleaning_up (0), head (NULL), _exit_status (STILL_ACTIVE)
{
pthread_once (&process_init, do_process_init);
EnterCriticalSection (&process_access);
thehandle = OpenProcess (PROCESS_ALL_ACCESS, FALSE, pid);
if (!thehandle)
{
printf ("unable to obtain handle for new cache process %ld\n", pid);
thehandle = INVALID_HANDLE_VALUE;
}
debug_printf ("Got handle %p for new cache process %ld\n", thehandle, pid);
InitializeCriticalSection (&access);
LeaveCriticalSection (&process_access);
}
process::~process ()
{
DeleteCriticalSection (&access);
}
HANDLE
process::handle ()
{
// DWORD exitstate = exit_code ();
// if (exitstate == STILL_ACTIVE)
return thehandle;
/* FIXME: call the cleanup list ? */
// CloseHandle (thehandle);
// debug_printf ("Process id %ld has terminated, attempting to open a new handle\n",
// winpid);
// thehandle = OpenProcess (PROCESS_ALL_ACCESS, FALSE, winpid);
// debug_printf ("Got handle %p when refreshing cache process %ld\n", thehandle, winpid);
// /* FIXME: what if OpenProcess fails ? */
// if (thehandle)
// {
// _exit_status = STILL_ACTIVE;
// exit_code ();
// }
// else
// thehandle = INVALID_HANDLE_VALUE;
// return thehandle;
}
DWORD process::exit_code ()
{
if (_exit_status != STILL_ACTIVE)
return _exit_status;
bool
err = GetExitCodeProcess (thehandle, &_exit_status);
if (!err)
{
debug_printf ("Failed to retrieve exit code (%ld)\n", GetLastError ());
thehandle = INVALID_HANDLE_VALUE;
return _exit_status;
}
else if (_exit_status == STILL_ACTIVE)
return _exit_status;
/* add new cleanup task etc etc ? */
return _exit_status;
}
/* this is single threaded. It's called after the process is removed from the cache,
* but inserts may be attemped by worker threads that have a pointer to it */
void
process::cleanup ()
{
/* Serialize this */
EnterCriticalSection (&access);
InterlockedIncrement (&(long)cleaning_up);
class cleanup_routine *entry = head;
while (entry)
{
class cleanup_routine *temp;
entry->cleanup (winpid);
temp = entry->next;
delete entry;
entry = temp;
}
LeaveCriticalSection (&access);
}
bool
process::add_cleanup_routine (class cleanup_routine *new_cleanup)
{
if (cleaning_up)
return false;
EnterCriticalSection (&access);
/* check that we didn't block with ::cleanup ()
* This rigmarole is to get around win9x's glaring missing TryEnterCriticalSection call
* which would be a whole lot easier
*/
if (cleaning_up)
{
LeaveCriticalSection (&access);
return false;
}
new_cleanup->next = head;
head = new_cleanup;
LeaveCriticalSection (&access);
return true;
}
/* process_cleanup */
void
process_cleanup::process ()
{
theprocess->cleanup ();
delete theprocess;
}
/* process_process_param */
DWORD
process_process_param::request_loop ()
{
process_cache *cache = (process_cache *) queue;
/* always malloc one, so there is no special case in the loop */
ssize_t HandlesSize = 2;
HANDLE *Handles = (HANDLE *) malloc (sizeof (HANDLE) * HandlesSize);
process **Entries = (process **) malloc (sizeof (LPVOID) * HandlesSize);
/* TODO: put [1] at the end as it will also get done if a process dies? */
Handles[0] = interrupt;
Handles[1] = cache->cache_add_trigger;
while (cache->active && !shutdown)
{
int copied;
copied = -1;
int offset;
offset = 1;
int count;
count = 2;
while ((copied == HandlesSize - 2 - offset) || copied < 0)
{
/* we need more storage to cope with all the HANDLES */
if (copied == HandlesSize - 2 - offset)
{
HANDLE *temp = (HANDLE *) realloc (Handles,
sizeof (HANDLE) *
HandlesSize + 10);
if (!temp)
{
printf
("cannot allocate more storage for the handle array!\n");
exit (1);
}
Handles = temp;
process **ptemp = (process **) realloc (Entries,
sizeof (LPVOID) *
HandlesSize + 10);
if (!ptemp)
{
printf
("cannot allocate more storage for the handle array!\n");
exit (1);
}
Entries = ptemp;
HandlesSize += 10;
}
offset += copied;
copied =
cache->handle_snapshot (&Handles[2], &Entries[2],
HandlesSize - 2 - offset, offset);
count += copied;
}
debug_printf ("waiting on %u objects\n", count);
DWORD rc = WaitForMultipleObjects (count, Handles, FALSE, INFINITE);
if (rc == WAIT_FAILED)
{
printf ("Could not wait on the process handles (%ld)!\n",
GetLastError ());
exit (1);
}
int objindex = rc - WAIT_OBJECT_0;
if (objindex > 1 && objindex < count)
{
debug_printf ("Process %ld has left the building\n",
Entries[objindex]->winpid);
/* fire off the termination routines */
cache->remove_process (Entries[objindex]);
}
else if (objindex >= 0 && objindex < 2)
{
/* 0 is shutdown - do nothing */
/* 1 is a cache add event - just rebuild the object list */
}
else
{
printf
("unexpected return code from WaitForMultiple objects in process_process_param::request_loop\n");
}
}
running = false;
return 0;
}

552
winsup/cygserver/shm.cc Normal file
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/* cygserver_shm.cc: Single unix specification IPC interface for Cygwin
Copyright 2001 Red Hat, Inc.
Originally written by Robert Collins <robert.collins@hotmail.com>
This file is part of Cygwin.
This software is a copyrighted work licensed under the terms of the
Cygwin license. Please consult the file "CYGWIN_LICENSE" for
details. */
#ifdef __OUTSIDE_CYGWIN__
#undef __INSIDE_CYGWIN__
#else
#include "winsup.h"
#endif
#ifndef __INSIDE_CYGWIN__
#define DEBUG 0
#define system_printf printf
#define debug_printf if (DEBUG) printf
#define api_fatal printf
#include <stdio.h>
#include <windows.h>
#endif
#include <sys/stat.h>
#include <errno.h>
#include "cygerrno.h"
#include <unistd.h>
#include "security.h"
//#include "fhandler.h"
//#include "dtable.h"
//#include "cygheap.h"
#include <stdio.h>
//#include "thread.h"
#ifndef __INSIDE_CYGWIN__
#define __INSIDE_CYGWIN__
#include <sys/shm.h>
#undef __INSIDE_CYGWIN__
#else
#include <sys/shm.h>
#endif
//#include "perprocess.h"
#include <threaded_queue.h>
#include <cygwin/cygserver_process.h>
#include "cygserver_shm.h"
// FIXME IS THIS CORRECT
/* Implementation notes: We use two shared memory regions per key:
* One for the control structure, and one for the shared memory.
* While this has a higher overhead tham a single shared area,
* It allows more flexability. As the entire code is transparent to the user
* We can merge these in the future should it be needed.
* Also, IPC_PRIVATE keys create unique mappings each time. The shm_ids just
* keep monotonically incrementing - system wide.
*/
size_t
getsystemallocgranularity ()
{
SYSTEM_INFO sysinfo;
static size_t buffer_offset = 0;
if (buffer_offset)
return buffer_offset;
GetSystemInfo (&sysinfo);
buffer_offset = sysinfo.dwAllocationGranularity;
return buffer_offset;
}
client_request_shm::client_request_shm ():client_request (CYGSERVER_REQUEST_SHM_GET, sizeof (parameters))
{
buffer = (char *) &parameters;
}
/* FIXME: If building on a 64-bit compiler, the address->int typecast will fail.
* Solution: manually calculate the next id value
*/
#if 0
extern "C" void *
shmat (int shmid, const void *shmaddr, int parameters.in.shmflg)
{
class shmid_ds *shm = (class shmid_ds *) shmid; //FIXME: verifyable object test
if (shmaddr)
{
//FIXME: requested base address ?!
set_errno (EINVAL);
return (void *) -1;
}
void *rv = MapViewOfFile (shm->attachmap,
(parameters.in.shmflg & SHM_RDONLY) ?
FILE_MAP_READ : FILE_MAP_WRITE, 0,
0, 0);
if (!rv)
{
//FIXME: translate GetLastError()
set_errno (EACCES);
return (void *) -1;
}
/* FIXME: this needs to be globally protected to prevent a mismatch betwen
* attach count and attachees list
*/
InterlockedIncrement (&shm->shm_nattch);
_shmattach *attachnode = new _shmattach;
attachnode->data = rv;
attachnode->next =
(_shmattach *) InterlockedExchangePointer ((LONG *) & shm->attachhead,
(long int) attachnode);
return rv;
}
#endif
/* FIXME: evaluate getuid() and getgid() against the requested mode. Then
* choose PAGE_READWRITE | PAGE_READONLY and FILE_MAP_WRITE | FILE_MAP_READ
* appropriately
*/
/* Test result from openbsd: shm ids are persistent cross process if a handle is left
* open. This could lead to resource starvation: we're not copying that behaviour
* unless we have to. (It will involve acygwin1.dll gloal shared list :[ ).
*/
/* FIXME: shmid should be a verifyable object
*/
/* FIXME: on NT we should check everything against the SD. On 95 we just emulate.
*/
extern GENERIC_MAPPING access_mapping;
extern int
check_and_dup_handle (HANDLE from_process, HANDLE to_process,
HANDLE from_process_token,
DWORD access,
HANDLE from_handle,
HANDLE * to_handle_ptr, BOOL bInheritHandle);
//FIXME: where should this live
static shmnode *shm_head = NULL;
/* must be long for InterlockedIncrement */
static long new_id = 0;
static long new_private_key = 0;
void
client_request_shm::serve (transport_layer_base * conn,
process_cache * cache)
{
// DWORD sd_size = 4096;
// char sd_buf[4096];
PSECURITY_DESCRIPTOR psd = (PSECURITY_DESCRIPTOR) parameters.in.sd_buf;
// /* create a sd for our open requests based on shmflag & 0x01ff */
// psd = alloc_sd (getuid (), getgid (), cygheap->user.logsrv (),
// parameters.in.shmflg & 0x01ff, psd, &sd_size);
HANDLE from_process_handle = NULL;
HANDLE token_handle = NULL;
DWORD rc;
from_process_handle = cache->process (parameters.in.pid)->handle ();
/* possible TODO: reduce the access on the handle before we use it */
/* Note that unless we do this, we don't need to call CloseHandle - it's kept open
* by the process cache until the process terminates.
* We may need a refcount on the cache however...
*/
if (!from_process_handle)
{
debug_printf ("error opening process (%lu)\n", GetLastError ());
header.error_code = EACCES;
return;
}
conn->impersonate_client ();
rc = OpenThreadToken (GetCurrentThread (),
TOKEN_QUERY, TRUE, &token_handle);
conn->revert_to_self ();
if (!rc)
{
debug_printf ("error opening thread token (%lu)\n", GetLastError ());
header.error_code = EACCES;
CloseHandle (from_process_handle);
return;
}
/* we trust the clients request - we will be doing it as them, and
* the worst they can do is open their own permissions
*/
SECURITY_ATTRIBUTES sa;
sa.nLength = sizeof (sa);
sa.lpSecurityDescriptor = psd;
sa.bInheritHandle = TRUE; /* the memory structures inherit ok */
char *shmname = NULL, *shmaname = NULL;
char stringbuf[29], stringbuf1[29];
/* TODO: make this code block a function! */
if (parameters.in.type == SHM_REATTACH)
{
/* just find and fill out the existing shm_id */
shmnode *tempnode = shm_head;
while (tempnode)
{
if (tempnode->shm_id == parameters.in.shm_id)
{
parameters.out.shm_id = tempnode->shm_id;
parameters.out.key = tempnode->key;
if (check_and_dup_handle
(GetCurrentProcess (), from_process_handle, token_handle,
DUPLICATE_SAME_ACCESS, tempnode->filemap,
&parameters.out.filemap, TRUE) != 0)
{
debug_printf ("error duplicating filemap handle (%lu)\n",
GetLastError ());
header.error_code = EACCES;
}
if (check_and_dup_handle
(GetCurrentProcess (), from_process_handle, token_handle,
DUPLICATE_SAME_ACCESS, tempnode->attachmap,
&parameters.out.attachmap, TRUE) != 0)
{
debug_printf ("error duplicating attachmap handle (%lu)\n",
GetLastError ());
header.error_code = EACCES;
}
CloseHandle (token_handle);
return;
}
tempnode = tempnode->next;
}
header.error_code = EINVAL;
CloseHandle (token_handle);
return;
}
/* someone attached */
/* someone can send shm_id's they don't have and currently we will increment those
* attach counts. If someone wants to fix that, please go ahead.
* The problem is that shm_get has nothing to do with the ability to attach. Attach
* requires a permission check, which we get the OS to do in MapViewOfFile.
*/
if (parameters.in.type == SHM_ATTACH)
{
shmnode *tempnode = shm_head;
while (tempnode)
{
if (tempnode->shm_id == parameters.in.shm_id)
{
InterlockedIncrement (&tempnode->shmds->shm_nattch);
header.error_code = 0;
CloseHandle (token_handle);
return;
}
tempnode = tempnode->next;
}
header.error_code = EINVAL;
CloseHandle (token_handle);
return;
}
/* it's a original request from the users */
/* FIXME: enter the checking for existing keys mutex. This mutex _must_ be system wide
* to prevent races on shmget.
*/
if (parameters.in.key == IPC_PRIVATE)
{
/* create the mapping name (CYGWINSHMKPRIVATE_0x01234567 */
/* The K refers to Key, the actual mapped area has D */
long private_key = (int) InterlockedIncrement (&new_private_key);
snprintf (stringbuf, 29, "CYGWINSHMKPRIVATE_0x%0x", private_key);
shmname = stringbuf;
snprintf (stringbuf1, 29, "CYGWINSHMDPRIVATE_0x%0x", private_key);
shmaname = stringbuf1;
}
else
{
/* create the mapping name (CYGWINSHMK0x0123456789abcdef */
/* The K refers to Key, the actual mapped area has D */
snprintf (stringbuf, 29, "CYGWINSHMK0x%0qx", parameters.in.key);
shmname = stringbuf;
snprintf (stringbuf1, 29, "CYGWINSHMD0x%0qx", parameters.in.key);
shmaname = stringbuf1;
debug_printf ("system id strings are \n%s\n%s\n", shmname, shmaname);
debug_printf ("key input value is 0x%0qx\n", parameters.in.key);
}
/* attempt to open the key */
/* get an existing key */
/* On unix the same shmid identifier is returned on multiple calls to shm_get
* with the same key and size. Different modes is a ?.
*/
/* walk the list of known keys and return the id if found. remember, we are
* authoritative...
*/
shmnode *tempnode = shm_head;
while (tempnode)
{
if (tempnode->key == parameters.in.key
&& parameters.in.key != IPC_PRIVATE)
{
// FIXME: free the mutex
if (parameters.in.size
&& tempnode->shmds->shm_segsz < parameters.in.size)
{
header.error_code = EINVAL;
CloseHandle (token_handle);
return;
}
/* FIXME: can the same process call this twice without error ? test
* on unix
*/
if ((parameters.in.shmflg & IPC_CREAT)
&& (parameters.in.shmflg & IPC_EXCL))
{
header.error_code = EEXIST;
debug_printf
("attempt to exclusively create already created shm_area with key 0x%0qx\n",
parameters.in.key);
// FIXME: free the mutex
CloseHandle (token_handle);
return;
}
// FIXME: do we need to other tests of the requested mode with the
// tempnode->shm_id mode ? testcase on unix needed.
// FIXME how do we do the security test? or
// do we wait for shmat to bother with that?
/* One possibly solution: impersonate the client, and then test we can
* reopen the area. In fact we'll probably have to do that to get
* handles back to them, alternatively just tell them the id, and then
* let them attempt the open.
*/
parameters.out.shm_id = tempnode->shm_id;
if (check_and_dup_handle (GetCurrentProcess (), from_process_handle,
token_handle,
DUPLICATE_SAME_ACCESS,
tempnode->filemap,
&parameters.out.filemap, TRUE) != 0)
{
printf ("error duplicating filemap handle (%lu)\n",
GetLastError ());
header.error_code = EACCES;
/*mutex*/
CloseHandle (token_handle);
return;
}
if (check_and_dup_handle (GetCurrentProcess (), from_process_handle,
token_handle,
DUPLICATE_SAME_ACCESS,
tempnode->attachmap,
&parameters.out.attachmap, TRUE) != 0)
{
printf ("error duplicating attachmap handle (%lu)\n",
GetLastError ());
header.error_code = EACCES;
/*mutex*/
CloseHandle (token_handle);
return;
}
CloseHandle (token_handle);
return;
}
tempnode = tempnode->next;
}
/* couldn't find a currently open shm area. */
/* create one */
/* do this as the client */
conn->impersonate_client ();
/* This may need sh_none... it's only a control structure */
HANDLE filemap = CreateFileMapping (INVALID_HANDLE_VALUE, // system pagefile.
&sa,
PAGE_READWRITE, // protection
0x00000000,
getsystemallocgranularity (),
shmname // object name
);
int lasterr = GetLastError ();
conn->revert_to_self ();
if (filemap == NULL)
{
/* We failed to open the filemapping ? */
system_printf ("failed to open file mapping: %lu\n", GetLastError ());
// free the mutex
// we can assume that it exists, and that it was an access problem.
header.error_code = EACCES;
CloseHandle (token_handle);
return;
}
/* successfully opened the control region mapping */
/* did we create it ? */
int oldmapping = lasterr == ERROR_ALREADY_EXISTS;
if (oldmapping)
{
/* should never happen - we are the global daemon! */
#if 0
if ((parameters.in.shmflg & IPC_CREAT)
&& (parameters.in.shmflg & IPC_EXCL))
#endif
{
/* FIXME free mutex */
CloseHandle (filemap);
header.error_code = EEXIST;
CloseHandle (token_handle);
return;
}
}
/* we created a new mapping */
if (parameters.in.key != IPC_PRIVATE &&
(parameters.in.shmflg & IPC_CREAT) == 0)
{
CloseHandle (filemap);
/* FIXME free mutex */
header.error_code = ENOENT;
CloseHandle (token_handle);
return;
}
conn->impersonate_client ();
void *mapptr = MapViewOfFile (filemap, FILE_MAP_WRITE, 0, 0, 0);
conn->revert_to_self ();
if (!mapptr)
{
CloseHandle (filemap);
//FIXME: close filemap and free the mutex
/* we couldn't access the mapped area with the requested permissions */
header.error_code = EACCES;
CloseHandle (token_handle);
return;
}
conn->impersonate_client ();
/* Now get the user data */
HANDLE attachmap = CreateFileMapping (INVALID_HANDLE_VALUE, // system pagefile
&sa,
PAGE_READWRITE, // protection (FIXME)
0x00000000,
parameters.in.size +
parameters.in.size %
getsystemallocgranularity (),
shmaname // object name
);
conn->revert_to_self ();
if (attachmap == NULL)
{
system_printf ("failed to get shm attachmap\n");
header.error_code = ENOMEM;
UnmapViewOfFile (mapptr);
CloseHandle (filemap);
/* FIXME exit the mutex */
CloseHandle (token_handle);
return;
}
shmid_ds *shmtemp = new shmid_ds;
if (!shmtemp)
{
system_printf ("failed to malloc shm node\n");
header.error_code = ENOMEM;
UnmapViewOfFile (mapptr);
CloseHandle (filemap);
CloseHandle (attachmap);
/* FIXME exit mutex */
CloseHandle (token_handle);
return;
}
/* fill out the node data */
shmtemp->shm_perm.cuid = getuid ();
shmtemp->shm_perm.uid = shmtemp->shm_perm.cuid;
shmtemp->shm_perm.cgid = getgid ();
shmtemp->shm_perm.gid = shmtemp->shm_perm.cgid;
shmtemp->shm_perm.mode = parameters.in.shmflg & 0x01ff;
shmtemp->shm_lpid = 0;
shmtemp->shm_nattch = 0;
shmtemp->shm_atime = 0;
shmtemp->shm_dtime = 0;
shmtemp->shm_ctime = time (NULL);
shmtemp->shm_segsz = parameters.in.size;
*(shmid_ds *) mapptr = *shmtemp;
shmtemp->mapptr = mapptr;
/* no need for InterlockedExchange here, we're serialised by the global mutex */
tempnode = new shmnode;
tempnode->shmds = shmtemp;
tempnode->shm_id = (int) InterlockedIncrement (&new_id);
tempnode->key = parameters.in.key;
tempnode->filemap = filemap;
tempnode->attachmap = attachmap;
tempnode->next = shm_head;
shm_head = tempnode;
/* we now have the area in the daemon list, opened.
FIXME: leave the system wide shm mutex */
parameters.out.shm_id = tempnode->shm_id;
if (check_and_dup_handle (GetCurrentProcess (), from_process_handle,
token_handle,
DUPLICATE_SAME_ACCESS,
tempnode->filemap, &parameters.out.filemap,
TRUE) != 0)
{
printf ("error duplicating filemap handle (%lu)\n", GetLastError ());
header.error_code = EACCES;
CloseHandle (token_handle);
/* mutex et al */
return;
}
if (check_and_dup_handle (GetCurrentProcess (), from_process_handle,
token_handle,
DUPLICATE_SAME_ACCESS,
tempnode->attachmap, &parameters.out.attachmap,
TRUE) != 0)
{
printf ("error duplicating attachmap handle (%lu)\n", GetLastError ());
header.error_code = EACCES;
CloseHandle (from_process_handle);
CloseHandle (token_handle);
/* more cleanup... yay! */
return;
}
CloseHandle (token_handle);
return;
}

91
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/* cygserver_shm.h
Copyright 2001 Red Hat Inc.
Written by Robert Collins <rbtcollins@hotmail.com>
This file is part of Cygwin.
This software is a copyrighted work licensed under the terms of the
Cygwin license. Please consult the file "CYGWIN_LICENSE" for
details. */
#include <sys/types.h>
#include "cygwin/cygserver_transport.h"
#include "cygwin/cygserver.h"
#define SHM_CREATE 0
#define SHM_REATTACH 1
#define SHM_ATTACH 2
#define SHM_DETACH 3
class client_request_shm : public client_request
{
public:
#ifndef __INSIDE_CYGWIN__
virtual void serve (transport_layer_base *conn, process_cache *cache);
#endif
client_request_shm (key_t, size_t, int, char psdbuf[4096], pid_t);
client_request_shm ();
client_request_shm (int, int, pid_t);
client_request_shm (int, int);
union {
struct {int type; pid_t pid; int shm_id; key_t key; size_t size; int shmflg; char sd_buf[4096];} in;
struct {int shm_id; HANDLE filemap; HANDLE attachmap; key_t key;} out;
} parameters;
};
#ifndef __INSIDE_CYGWIN__
class shm_cleanup : cleanup_routine
{
public:
virtual void cleanup (long winpid);
};
#endif
#if 0
class _shmattach {
public:
void *data;
class _shmattach *next;
};
class shmid_ds {
public:
struct ipc_perm shm_perm;
size_t shm_segsz;
pid_t shm_lpid;
pid_t shm_cpid;
shmatt_t shm_nattch;
time_t shm_atime;
time_t shm_dtime;
time_t shm_ctime;
HANDLE filemap;
HANDLE attachmap;
void *mapptr;
class _shmattach *attachhead;
};
class shmnode {
public:
class shmid_ds * shmid;
class shmnode *next;
key_t key;
};
//....
struct shmid_ds {
struct ipc_perm shm_perm;
size_t shm_segsz;
pid_t shm_lpid;
pid_t shm_cpid;
shmatt_t shm_nattch;
time_t shm_atime;
time_t shm_dtime;
time_t shm_ctime;
};
void *shmat(int, const void *, int);
int shmctl(int, int, struct shmid_ds *);
int shmdt(const void *);
int shmget(key_t, size_t, int);
#endif

249
winsup/cygserver/threaded_queue.cc Normal file
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/* threaded_queue.cc
Copyright 2001 Red Hat Inc.
Written by Robert Collins <rbtcollins@hotmail.com>
This file is part of Cygwin.
This software is a copyrighted work licensed under the terms of the
Cygwin license. Please consult the file "CYGWIN_LICENSE" for
details. */
#include <errno.h>
#include <stdio.h>
#include <unistd.h>
#include <windows.h>
#include <sys/types.h>
#include "wincap.h"
#include "threaded_queue.h"
#define DEBUG 1
#define debug_printf if (DEBUG) printf
/* threaded_queue */
DWORD WINAPI
worker_function (LPVOID LpParam)
{
class threaded_queue *queue = (class threaded_queue *) LpParam;
class queue_request *request;
/* FIXME use a threadsafe pop instead for speed? */
while (queue->active)
{
EnterCriticalSection (&queue->queuelock);
while (!queue->request && queue->active)
{
LeaveCriticalSection (&queue->queuelock);
DWORD rc = WaitForSingleObject (queue->event, INFINITE);
if (rc == WAIT_FAILED)
{
printf ("Wait for event failed\n");
queue->running--;
ExitThread (0);
}
EnterCriticalSection (&queue->queuelock);
}
if (!queue->active)
{
queue->running--;
LeaveCriticalSection (&queue->queuelock);
ExitThread (0);
}
/* not needed, but it is efficient */
request =
(class queue_request *) InterlockedExchangePointer (&queue->request,
queue->request->
next);
LeaveCriticalSection (&queue->queuelock);
request->process ();
delete request;
}
queue->running--;
ExitThread (0);
}
void
threaded_queue::create_workers ()
{
InitializeCriticalSection (&queuelock);
if ((event = CreateEvent (NULL, FALSE, FALSE, NULL)) == NULL)
{
printf ("Failed to create event queue (%lu), terminating\n",
GetLastError ());
exit (1);
}
active = true;
/* FIXME: Use a stack pair and create threads on the fly whenever
* we have to to service a request.
*/
for (unsigned int i = 0; i < initial_workers; i++)
{
HANDLE hThread;
DWORD tid;
hThread = CreateThread (NULL, 0, worker_function, this, 0, &tid);
if (hThread == NULL)
{
printf ("Failed to create thread (%lu), terminating\n",
GetLastError ());
exit (1);
}
CloseHandle (hThread);
running++;
}
}
void
threaded_queue::cleanup ()
{
/* harvest the threads */
active = false;
/* kill the request processing loops */
queue_process_param *reqloop;
/* make sure we don't race with a incoming request creation */
EnterCriticalSection (&queuelock);
reqloop =
(queue_process_param *) InterlockedExchangePointer (&process_head, NULL);
while (reqloop)
{
queue_process_param *t = reqloop;
reqloop = reqloop->next;
delete t;
}
LeaveCriticalSection (&queuelock);
if (!running)
return;
printf ("Waiting for current queue threads to terminate\n");
for (int n = running; n; n--)
PulseEvent (event);
while (running)
sleep (1);
DeleteCriticalSection (&queuelock);
CloseHandle (event);
}
/* FIXME: return success or failure */
void
threaded_queue::add (queue_request * therequest)
{
/* safe to not "Try" because workers don't hog this, they wait on the event
*/
EnterCriticalSection (&queuelock);
if (!running)
{
printf ("No worker threads to handle request!\n");
}
if (!request)
request = therequest;
else
{
/* add to the queue end. */
queue_request *listrequest = request;
while (listrequest->next)
listrequest = listrequest->next;
listrequest->next = therequest;
}
PulseEvent (event);
LeaveCriticalSection (&queuelock);
}
/* FIXME: return success or failure rather than quitting */
void
threaded_queue::process_requests (queue_process_param * params,
threaded_queue_thread_function *
request_loop)
{
if (params->start (request_loop, this) == false)
exit (1);
params->next =
(queue_process_param *) InterlockedExchangePointer (&process_head,
params);
}
/* queue_process_param */
/* How does a constructor return an error? */
queue_process_param::queue_process_param (bool ninterruptible):running (false), shutdown (false),
interruptible
(ninterruptible)
{
if (!interruptible)
return;
debug_printf ("creating an interruptible processing thread\n");
if ((interrupt = CreateEvent (NULL, FALSE, FALSE, NULL)) == NULL)
{
printf ("Failed to create interrupt event (%lu), terminating\n",
GetLastError ());
exit (1);
}
}
queue_process_param::~queue_process_param ()
{
if (running)
stop ();
if (!interruptible)
return;
CloseHandle (interrupt);
}
bool
queue_process_param::start (threaded_queue_thread_function * request_loop,
threaded_queue * thequeue)
{
queue = thequeue;
hThread = CreateThread (NULL, 0, request_loop, this, 0, &tid);
if (hThread)
{
running = true;
return true;
}
printf ("Failed to create thread (%lu), terminating\n", GetLastError ());
return false;
}
void
queue_process_param::stop ()
{
if (interruptible)
{
InterlockedExchange (&shutdown, true);
PulseEvent (interrupt);
/* Wait up to 50 ms for the thread to exit. If it doesn't _and_ we get
* scheduled again, we print an error and exit. We _should_ loop or
* try resignalling. We don't want to hand here though...
*/
int n = 5;
while (n-- && WaitForSingleObject (hThread, 1000) == WAIT_TIMEOUT);
if (!n)
{
printf ("Process thread didn't shutdown cleanly after 200ms!\n");
exit (1);
}
else
running = false;
}
else
{
printf ("killing request loop thread %ld\n", tid);
int rc;
if (!(rc = TerminateThread (hThread, 0)))
{
printf ("error shutting down request loop worker thread\n");
}
running = false;
}
CloseHandle (hThread);
}
/* queue_request */
queue_request::queue_request ():next (NULL)
{
}
void
queue_request::process (void)
{
printf ("\n**********************************************\n"
"Oh no! we've hit the base queue_request process() function, and this indicates a coding\n"
"fault !!!\n" "***********************************************\n");
}

92
winsup/cygserver/transport.cc Normal file
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/* cygserver_transport.cc
Copyright 2001 Red Hat Inc.
Written by Robert Collins <rbtcollins@hotmail.com>
This file is part of Cygwin.
This software is a copyrighted work licensed under the terms of the
Cygwin license. Please consult the file "CYGWIN_LICENSE" for
details. */
#include <errno.h>
#include <stdio.h>
#include <unistd.h>
#include <windows.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netdb.h>
#include "wincap.h"
#include "cygwin/cygserver_transport.h"
#include "cygwin/cygserver_transport_pipes.h"
#include "cygwin/cygserver_transport_sockets.h"
/* to allow this to link into cygwin and the .dll, a little magic is needed. */
#ifndef __OUTSIDE_CYGWIN__
#include "winsup.h"
#else
#define debug_printf printf
#endif
/* The factory */
class transport_layer_base *create_server_transport()
{
transport_layer_base *temp;
/* currently there is only the base class! */
if (wincap.is_winnt ())
temp = new transport_layer_pipes ();
else
temp = new transport_layer_base ();
return temp;
}
transport_layer_base::transport_layer_base ()
{
/* should we throw an error of some sort ? */
}
void
transport_layer_base::listen ()
{
}
class transport_layer_base *
transport_layer_base::accept ()
{
return NULL;
}
void
transport_layer_base::close()
{
}
ssize_t
transport_layer_base::read (char *buf, size_t len)
{
return 0;
}
ssize_t
transport_layer_base::write (char *buf, size_t len)
{
return 0;
}
bool
transport_layer_base::connect ()
{
return false;
}
void
transport_layer_base::impersonate_client ()
{
}
void
transport_layer_base::revert_to_self ()
{
}

205
winsup/cygserver/transport_pipes.cc Normal file
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/* cygserver_transport_pipes.cc
Copyright 2001 Red Hat Inc.
Written by Robert Collins <rbtcollins@hotmail.com>
This file is part of Cygwin.
This software is a copyrighted work licensed under the terms of the
Cygwin license. Please consult the file "CYGWIN_LICENSE" for
details. */
#include <errno.h>
#include <stdio.h>
#include <unistd.h>
#include <windows.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netdb.h>
#include "wincap.h"
#include "cygwin/cygserver_transport.h"
#include "cygwin/cygserver_transport_pipes.h"
/* to allow this to link into cygwin and the .dll, a little magic is needed. */
#ifndef __OUTSIDE_CYGWIN__
#include "winsup.h"
#else
#define DEBUG 0
#define debug_printf if (DEBUG) printf
#endif
transport_layer_pipes::transport_layer_pipes (HANDLE new_pipe)
{
pipe = new_pipe;
if (inited != true)
init_security();
};
transport_layer_pipes::transport_layer_pipes ()
{
pipe = NULL;
strcpy(pipe_name, "\\\\.\\pipe\\cygwin_lpc");
if (inited != true)
init_security();
}
void
transport_layer_pipes::init_security()
{
/* FIXME: pthread_once or equivalent needed */
InitializeSecurityDescriptor (&sd, SECURITY_DESCRIPTOR_REVISION);
SetSecurityDescriptorDacl (&sd, TRUE, 0, FALSE);
sec_none_nih.nLength = sec_all_nih.nLength = sizeof (SECURITY_ATTRIBUTES);
sec_none_nih.bInheritHandle = sec_all_nih.bInheritHandle = FALSE;
sec_none_nih.lpSecurityDescriptor = NULL;
sec_all_nih.lpSecurityDescriptor = &sd;
inited = true;
}
void
transport_layer_pipes::listen ()
{
/* no-op */
}
class transport_layer_pipes *
transport_layer_pipes::accept ()
{
if (pipe)
{
debug_printf ("Already have a pipe in this %p\n",this);
return NULL;
}
pipe = CreateNamedPipe (pipe_name,
PIPE_ACCESS_DUPLEX,
PIPE_TYPE_BYTE | PIPE_WAIT,
PIPE_UNLIMITED_INSTANCES,
0, 0, 1000,
&sec_all_nih );
if (pipe == INVALID_HANDLE_VALUE)
{
debug_printf ("error creating pipe (%lu)\n.", GetLastError ());
return NULL;
}
if ( !ConnectNamedPipe ( pipe, NULL ) &&
GetLastError () != ERROR_PIPE_CONNECTED)
{
printf ("error connecting to pipe (%lu)\n.", GetLastError ());
CloseHandle (pipe);
pipe = NULL;
return NULL;
}
transport_layer_pipes *new_conn = new transport_layer_pipes (pipe);
pipe = NULL;
return new_conn;
}
void
transport_layer_pipes::close()
{
debug_printf ("closing pipe %p\n", pipe);
if (pipe && pipe != INVALID_HANDLE_VALUE)
{
FlushFileBuffers (pipe);
DisconnectNamedPipe (pipe);
CloseHandle (pipe);
}
}
ssize_t
transport_layer_pipes::read (char *buf, size_t len)
{
debug_printf ("reading from pipe %p\n", pipe);
if (!pipe || pipe == INVALID_HANDLE_VALUE)
return -1;
DWORD bytes_read;
DWORD rc = ReadFile (pipe, buf, len, &bytes_read, NULL);
if (!rc)
{
debug_printf ("error reading from pipe (%lu)\n", GetLastError ());
return -1;
}
return bytes_read;
}
ssize_t
transport_layer_pipes::write (char *buf, size_t len)
{
debug_printf ("writing to pipe %p\n", pipe);
DWORD bytes_written, rc;
if (!pipe || pipe == INVALID_HANDLE_VALUE)
return -1;
rc = WriteFile (pipe, buf, len, &bytes_written, NULL);
if (!rc)
{
debug_printf ("error writing to pipe (%lu)\n", GetLastError ());
return -1;
}
return bytes_written;
}
bool
transport_layer_pipes::connect ()
{
if (pipe && pipe != INVALID_HANDLE_VALUE)
{
debug_printf ("Already have a pipe in this %p\n",this);
return false;
}
while (1)
{
pipe = CreateFile (pipe_name,
GENERIC_READ | GENERIC_WRITE,
FILE_SHARE_READ | FILE_SHARE_WRITE,
&sec_all_nih,
OPEN_EXISTING,
0, NULL);
if (pipe != INVALID_HANDLE_VALUE)
/* got the pipe */
return true;
if (GetLastError () != ERROR_PIPE_BUSY)
{
debug_printf ("Error opening the pipe (%lu)\n", GetLastError ());
pipe = NULL;
return false;
}
if (!WaitNamedPipe (pipe_name, 20000))
debug_printf ( "error connecting to server pipe after 20 seconds (%lu)\n", GetLastError () );
/* We loop here, because the pipe exists but is busy. If it doesn't exist
* the != ERROR_PIPE_BUSY will catch it.
*/
}
}
void
transport_layer_pipes::impersonate_client ()
{
debug_printf ("impersonating pipe %p\n", pipe);
if (pipe && pipe != INVALID_HANDLE_VALUE)
{
BOOL rv = ImpersonateNamedPipeClient (pipe);
if (!rv)
debug_printf ("Failed to Impersonate the client, (%lu)\n", GetLastError ());
}
debug_printf("I am who you are\n");
}
void
transport_layer_pipes::revert_to_self ()
{
RevertToSelf ();
debug_printf("I am who I yam\n");
}

131
winsup/cygserver/transport_sockets.cc Normal file
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@@ -0,0 +1,131 @@
/* cygserver_transport_sockets.cc
Copyright 2001 Red Hat Inc.
Written by Robert Collins <rbtcollins@hotmail.com>
This file is part of Cygwin.
This software is a copyrighted work licensed under the terms of the
Cygwin license. Please consult the file "CYGWIN_LICENSE" for
details. */
#include <errno.h>
#include <stdio.h>
#include <unistd.h>
#include <windows.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netdb.h>
#include "wincap.h"
#include "cygwin/cygserver_transport.h"
#include "cygwin/cygserver_transport_sockets.h"
/* to allow this to link into cygwin and the .dll, a little magic is needed. */
#ifndef __OUTSIDE_CYGWIN__
#include "winsup.h"
extern "C" int
cygwin_socket (int af, int type, int protocol);
extern "C" int
cygwin_connect (int fd,
const struct sockaddr *name,
int namelen);
extern "C" int
cygwin_accept (int fd, struct sockaddr *peer, int *len);
extern "C" int
cygwin_listen (int fd, int backlog);
extern "C" int
cygwin_bind (int fd, const struct sockaddr *my_addr, int addrlen);
#else
#define cygwin_accept(A,B,C) ::accept(A,B,C)
#define cygwin_socket(A,B,C) ::socket(A,B,C)
#define cygwin_listen(A,B) ::listen(A,B)
#define cygwin_bind(A,B,C) ::bind(A,B,C)
#define cygwin_connect(A,B,C) ::connect(A,B,C)
#define debug_printf printf
#endif
transport_layer_sockets::transport_layer_sockets (int newfd): fd(newfd)
{
/* This may not be needed in this constructor - it's only used
* when creating a connection via bind or connect
*/
sockdetails.sa_family = AF_UNIX;
strcpy (sockdetails.sa_data, "/tmp/cygdaemo");
sdlen = strlen(sockdetails.sa_data) + sizeof(sockdetails.sa_family);
};
transport_layer_sockets::transport_layer_sockets (): fd (-1)
{
sockdetails.sa_family = AF_UNIX;
strcpy (sockdetails.sa_data, "/tmp/cygdaemo");
sdlen = strlen(sockdetails.sa_data) + sizeof(sockdetails.sa_family);
}
void
transport_layer_sockets::listen ()
{
/* we want a thread pool based approach. */
if ((fd = cygwin_socket (AF_UNIX, SOCK_STREAM,0)) < 0)
printf ("Socket not created error %d\n", errno);
if (cygwin_bind(fd, &sockdetails, sdlen))
printf ("Bind doesn't like you. Tsk Tsk. Bind said %d\n", errno);
if (cygwin_listen(fd, 5) < 0)
printf ("And the OS just isn't listening, all it says is %d\n", errno);
}
class transport_layer_sockets *
transport_layer_sockets::accept ()
{
/* FIXME: check we have listened */
int new_fd;
if ((new_fd = cygwin_accept(fd, &sockdetails, &sdlen)) < 0)
{
printf ("Nup, could' accept. %d\n",errno);
return NULL;
}
transport_layer_sockets *new_conn = new transport_layer_sockets (new_fd);
return new_conn;
}
void
transport_layer_sockets::close()
{
/* FIXME - are we open? */
::close (fd);
}
ssize_t
transport_layer_sockets::read (char *buf, size_t len)
{
/* FIXME: are we open? */
return ::read (fd, buf, len);
}
ssize_t
transport_layer_sockets::write (char *buf, size_t len)
{
/* FIXME: are we open? */
return ::write (fd, buf, len);
}
bool
transport_layer_sockets::connect ()
{
/* are we already connected? */
if (fd != -1)
return false;
fd = cygwin_socket (AF_UNIX, SOCK_STREAM, 0);
if (cygwin_connect (fd, &sockdetails, sdlen) < 0)
{
debug_printf("client connect failure %d\n", errno);
::close (fd);
return false;
}
return true;
}