* path.h (pathconv_arg): Add PC_POSIX.

(path_conv): Add normalized_path field.
* path.cc (path_conv::~path_conv): New destructor.
(path_conv::check): Set normalized_path, where appropriate.
* dtable.cc (build_fhandler_from_name): Use normalized path from path_conv.
* syscalls.cc (chroot): Ditto.
* cygheap.h: Remove path_prefix_p declaration.  Christopher Faylor
<cgf@redhat.com> (minor fixups)
* Makefile.in: Add fhandler_proc.o, fhandler_registry.o, fhandler_process.o and
fhandler_virtual.o.
* dtable.cc (dtable::build_fhandler): Add entries for FH_PROC, FH_REGISTRY and
FH_PROCESS.  Set unix_name to the normalized posix path.
* fhandler.h: Add constants for FH_PROC, FH_REGISTRY and FH_PROCESS.  Add class
declarations for fhandler_virtual, fhandler_proc, fhandler_registry and
fhandler_virtual.  Update fhandler_union accordingly.
* fhandler_proc.cc: New file.  Add implementation for fhandler_proc.
* fhandler_virtual.cc: New file.  Add implementation for fhandler_virtual.
* fhandler_process.cc: New file.  Add implementation for fhandler_process.
* fhandler_registry.cc: New file.  Add implementation for fhandler_registry.
* path.cc: Add isproc and isvirtual_dev macros.
* path.cc (path_conv::check): Add check for virtual devices.
* path.cc (mount_info::conv_to_win32_path): Convert paths in /proc to empty
Win32 paths.
* path.cc (chdir): Replace check for FH_CYGDRIVE with more generic
isvirtual_dev macro.  Force setting of posix path for virtual fhandlers.
* path.h: Add externally visible path_prefix_p and normalized_posix_path
prototypes.

11 files changed, 240 insertions, 64 deletions

diff --git a/winsup/cygwin/ChangeLog b/winsup/cygwin/ChangeLog
index 7c80413a5..d5fea8fab 100644
--- a/winsup/cygwin/ChangeLog
+++ b/winsup/cygwin/ChangeLog
@@ -1,3 +1,45 @@
+2002-05-02  Christopher Faylor  <cgf@redhat.com>
+
+	* path.h (pathconv_arg): Add PC_POSIX.
+	(path_conv): Add normalized_path field.
+	* path.cc (path_conv::~path_conv): New destructor.
+	(path_conv::check): Set normalized_path, where appropriate.
+	* dtable.cc (build_fhandler_from_name): Use normalized path from
+	path_conv.
+	* syscalls.cc (chroot): Ditto.
+
+	* cygheap.h: Remove path_prefix_p declaration.
+
+2002-02-26  Christopher January <chris@atomice.net>
+	    Christopher Faylor <cgf@redhat.com> (minor fixups)
+
+	* Makefile.in: Add fhandler_proc.o, fhandler_registry.o,
+	fhandler_process.o and fhandler_virtual.o.
+	* dtable.cc (dtable::build_fhandler): Add entries for FH_PROC,
+	FH_REGISTRY and FH_PROCESS.  Set unix_name to the normalized posix
+	path.
+	* fhandler.h: Add constants for FH_PROC, FH_REGISTRY and FH_PROCESS.
+	Add class declarations for fhandler_virtual, fhandler_proc,
+	fhandler_registry and fhandler_virtual.  Update fhandler_union
+	accordingly.
+	* fhandler_proc.cc: New file.  Add implementation for fhandler_proc.
+	* fhandler_virtual.cc: New file.  Add implementation for
+	fhandler_virtual.
+	* fhandler_process.cc: New file.  Add implementation for
+	fhandler_process.
+	* fhandler_registry.cc: New file.  Add implementation for
+	fhandler_registry.
+	* path.cc: Add isproc and isvirtual_dev macros.
+	* path.cc (path_conv::check): Add check for virtual devices.
+	* path.cc (mount_info::conv_to_win32_path): Convert paths in /proc to
+	empty Win32 paths.
+	* path.cc (chdir): Replace check for FH_CYGDRIVE with more generic
+	isvirtual_dev macro.  Force setting of posix path for virtual
+	fhandlers.
+	* path.h: Add externally visible path_prefix_p and
+	normalized_posix_path prototypes.
+
+
 Wed May  1 16:06:02 2002  Jason Tishler <jason@tishler.net>
 
 	* include/cygwin/types.h: Include <sys/sysmacros.h>.
@@ -14,7 +56,7 @@ Wed Apr 17 11:27:04 2002  Jason Tishler <jason@tishler.net>
 
 2002-04-12  Egor Duda  <deo@logos-m.ru>
 
-	* fhandler.h (class fhandler_socket): New member to store socket type.  
+	* fhandler.h (class fhandler_socket): New member to store socket type.
 	(fhandler_socket::get_socket_type): Access it.
 	(fhandler_socket::set_socket_type): Ditto.
 	* net.cc (cygwin_socket): Store socket type.
@@ -55,7 +97,7 @@ Wed Apr 17 11:27:04 2002  Jason Tishler <jason@tishler.net>
 
 2002-03-19  Boris Schaeling  <boriss@web.de>
 
-        * poll.cc (poll): Add support for invalid descriptors.
+	* poll.cc (poll): Add support for invalid descriptors.
 
 2002-03-15  Robert Collins  <rbtcollins@hotmail.com>
 
@@ -76,7 +118,7 @@ Wed Apr 17 11:27:04 2002  Jason Tishler <jason@tishler.net>
 
 2002-03-15  Corinna Vinschen  <corinna@vinschen.de>
 
-	* glob.c (stat32_to_STAT): New function.   
+	* glob.c (stat32_to_STAT): New function.
 	(g_lstat): Call user space functions always with 32 bit struct stat
 	as a workaround.
 	(g_stat): Ditto.
@@ -144,10 +186,10 @@ Wed Apr 17 11:27:04 2002  Jason Tishler <jason@tishler.net>
 
 2002-03-05  Robert Collins  <rbtcollins@hotmail.com>
 
-	* cygserver_transport_pipes.cc (transport_layer_pipes::transport_layer_pipes): 
+	* cygserver_transport_pipes.cc (transport_layer_pipes::transport_layer_pipes):
 	Always init - until static members work correctly.
 	* shm.cc (shmget): Initialize the security descriptor - thanks Corinna!
-	* include/sys/ipc.h: Make the ipc control constants partitioned off from the sem 
+	* include/sys/ipc.h: Make the ipc control constants partitioned off from the sem
 	control constants.
 
 2002-03-04  Christian Lestrade  <christian.lestrade@free.fr>
@@ -211,7 +253,7 @@ Wed Apr 17 11:27:04 2002  Jason Tishler <jason@tishler.net>
 
 2002-01-17  Robert Collins  <rbtcollins@hotmail.com>
 
-	* cygserver.cc (check_and_dup_handle): Consolidate the two variants for 
+	* 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.
@@ -249,7 +291,7 @@ Mon Oct  8  7:41:00 2001  Robert Collins <rbtcollins@hotmail.com>
 	* 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 
+	* 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
@@ -294,7 +336,7 @@ Tue Oct  2 23:24:00 2001  Robert Collins <rbtcollins@hotmail.com>
 	(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 
+	* threaded_queue.h (class queue_process_param): Add support for
 	interruptible request loops.
 	* cygwin/include/cygwin/cygserver_process.h (class process_cache): Add
 	destructor.
@@ -312,7 +354,7 @@ Tue Oct  2 23:00:00 2001  Robert Collins <rbtcollins@hotmail.com>
 
 Tue Oct  2 16:06:00 2001  Robert Collins <rbtcollins@hotmail.com>
 
-	* Makefile.in: Remove cygserver_shm.o from cygwin1.dll. 
+	* 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.
@@ -322,7 +364,7 @@ Tue Oct  2 16:06:00 2001  Robert Collins <rbtcollins@hotmail.com>
 	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 
+	* 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.
@@ -330,7 +372,7 @@ Tue Oct  2 16:06:00 2001  Robert Collins <rbtcollins@hotmail.com>
 	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. 
+	(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.
@@ -345,7 +387,7 @@ Tue Oct  2  9:57:00 2001  Robert Collins <rbtcollins@hotmail.com>
 	(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 
+	(server_request_queue::process_requests): Remove guts to
 	threaded_queue::process_requests.
 	(server_request::server_request): Adjust for new types.
 	(worker_function): Delete.
@@ -360,10 +402,10 @@ 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 
+	(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 
+	(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.
@@ -372,13 +414,13 @@ Mon Oct  1 12:38:00 2001  Robert Collins <rbtcollins@hotmail.com>
 	(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 
+	* 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 
+	* 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 
+	* 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>
@@ -398,7 +440,7 @@ Sun Sep 30 23:41:00 2001  Robert Collins <rbtcollins@hotmail.com>
 	(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 
+	(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.
@@ -407,7 +449,7 @@ Sun Sep 30 23:41:00 2001  Robert Collins <rbtcollins@hotmail.com>
 	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 
+	* 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.
@@ -444,7 +486,7 @@ Sat Sep 29 20:40:00 2001  Robert Collins <rbtcollins@hotmail.com>
 	(transport_layer_base::read): Ditto.
 	(transport_layer_base::write): Ditto.
 	(transport_layer_base::connect): Ditto.
-	* cygserver_transport_pipes.cc: Include new header 
+	* 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.
@@ -846,7 +888,7 @@ Tue Sep 25 16:22:00 2001  Robert Collins <rbtcollins@hotmail.com>
 2002-01-21  DJ Delorie  <dj@redhat.com>
 
 	* Makefile.in (libpthread.a): Pass the assembler also.
- 	(libm.a): Ditto.
+	(libm.a): Ditto.
 	(libc.a): Ditto.
 	* speclib: Specify the assembler to dlltool.
 
@@ -911,9 +953,9 @@ Tue Sep 25 16:22:00 2001  Robert Collins <rbtcollins@hotmail.com>
 
 2002-01-19  Mark Bradshaw  <bradshaw@staff.crosswalk.com>
 
-        * cygwin.din: Add recvmsg and sendmsg.
-        * net.cc: Add cygwin_recvmsg and cygwin_sendmsg.
-        * /usr/include/sys/socket.h: Add recvmsg and sendmsg.
+	* cygwin.din: Add recvmsg and sendmsg.
+	* net.cc: Add cygwin_recvmsg and cygwin_sendmsg.
+	* /usr/include/sys/socket.h: Add recvmsg and sendmsg.
 
 2002-01-19  Corinna Vinschen  <corinna@vinschen.de>
 
@@ -965,7 +1007,7 @@ Tue Sep 25 16:22:00 2001  Robert Collins <rbtcollins@hotmail.com>
 	file parameter.
 
 2002-01-09  Christopher Faylor  <cgf@redhat.com>
-            Robert Collins  <rbtcollins@hotmail.com>
+	    Robert Collins  <rbtcollins@hotmail.com>
 
 	* exceptions.cc (early_stuff_init): Rename from misnamed
 	set_console_handler.
@@ -1042,7 +1084,7 @@ Tue Sep 25 16:22:00 2001  Robert Collins <rbtcollins@hotmail.com>
 
 2002-01-01  Christopher Faylor  <cgf@redhat.com>
 
-        * speclib: Remove temp files automatically.
+	* speclib: Remove temp files automatically.
 
 2002-01-01  Corinna Vinschen  <corinna@vinschen.de>
 	* fhandler.h (fhandler_socket::sun_path): New private member.
diff --git a/winsup/cygwin/Makefile.in b/winsup/cygwin/Makefile.in
index b8b2fae00..14d9fbe71 100644
--- a/winsup/cygwin/Makefile.in
+++ b/winsup/cygwin/Makefile.in
@@ -123,16 +123,17 @@ DLL_OFILES:=assert.o autoload.o cygheap.o cygserver_client.o cygserver_transport
 	delqueue.o dir.o dlfcn.o dll_init.o dtable.o environ.o errno.o exceptions.o \
 	exec.o external.o fcntl.o fhandler.o fhandler_clipboard.o fhandler_console.o \
 	fhandler_disk_file.o fhandler_dsp.o fhandler_floppy.o fhandler_mem.o \
-	fhandler_random.o fhandler_raw.o fhandler_serial.o fhandler_socket.o \
-	fhandler_tape.o fhandler_termios.o fhandler_tty.o fhandler_windows.o \
-	fhandler_zero.o fnmatch.o fork.o glob.o grp.o heap.o init.o ioctl.o ipc.o \
-	localtime.o malloc.o miscfuncs.o mmap.o net.o ntea.o passwd.o path.o \
-	pinfo.o pipe.o poll.o pthread.o regcomp.o regerror.o regexec.o \
-	regfree.o registry.o resource.o scandir.o sched.o sec_acl.o \
-	sec_helper.o security.o select.o shared.o shm.o shortcut.o signal.o \
-	sigproc.o smallprint.o spawn.o strace.o strsep.o sync.o syscalls.o \
-	sysconf.o syslog.o termios.o thread.o times.o tty.o uinfo.o uname.o \
-	v8_regexp.o v8_regerror.o v8_regsub.o wait.o wincap.o window.o \
+	fhandler_proc.o fhandler_process.o fhandler_random.o fhandler_raw.o \
+	fhandler_registry.o fhandler_serial.o fhandler_socket.o \
+	fhandler_tape.o fhandler_termios.o fhandler_tty.o fhandler_virtual.o \
+	fhandler_windows.o fhandler_zero.o fnmatch.o fork.o glob.o grp.o \
+	heap.o init.o ioctl.o ipc.o localtime.o malloc.o miscfuncs.o mmap.o \
+	net.o ntea.o passwd.o path.o pinfo.o pipe.o poll.o pthread.o regcomp.o \
+	regerror.o regexec.o regfree.o registry.o resource.o scandir.o sched.o \
+	sec_acl.o sec_helper.o security.o select.o shared.o shm.o shortcut.o \
+	signal.o sigproc.o smallprint.o spawn.o strace.o strsep.o sync.o \
+	syscalls.o sysconf.o syslog.o termios.o thread.o times.o tty.o uinfo.o \
+	uname.o v8_regexp.o v8_regerror.o v8_regsub.o wait.o wincap.o window.o \
 	$(EXTRA_DLL_OFILES) $(EXTRA_OFILES) $(MALLOC_OFILES) $(MT_SAFE_OBJECTS)
 
 GMON_OFILES:=gmon.o mcount.o profil.o
diff --git a/winsup/cygwin/cygheap.h b/winsup/cygwin/cygheap.h
index ec7624bea..154fd24bf 100644
--- a/winsup/cygwin/cygheap.h
+++ b/winsup/cygwin/cygheap.h
@@ -48,7 +48,6 @@ struct cygheap_root_mount_info
 
 /* CGF: FIXME This doesn't belong here */
 
-int path_prefix_p (const char *path1, const char *path2, int len1) __attribute__ ((regparm (3)));
 class cygheap_root
 {
   /* Root directory information.
diff --git a/winsup/cygwin/dtable.cc b/winsup/cygwin/dtable.cc
index f70e41599..93d5602fd 100644
--- a/winsup/cygwin/dtable.cc
+++ b/winsup/cygwin/dtable.cc
@@ -280,14 +280,14 @@ fhandler_base *
 dtable::build_fhandler_from_name (int fd, const char *name, HANDLE handle,
 				  path_conv& pc, unsigned opt, suffix_info *si)
 {
-  pc.check (name, opt | PC_NULLEMPTY | PC_FULL, si);
+  pc.check (name, opt | PC_NULLEMPTY | PC_FULL | PC_POSIX, si);
   if (pc.error)
     {
       set_errno (pc.error);
       return NULL;
     }
 
-  return build_fhandler (fd, pc.get_devn (), name, pc, pc.get_unitn ());
+  return build_fhandler (fd, pc.get_devn (), pc.normalized_path, pc, pc.get_unitn ());
 }
 
 #define cnew(name) new ((void *) ccalloc (HEAP_FHANDLER, 1, sizeof (name))) name
@@ -363,6 +363,15 @@ dtable::build_fhandler (int fd, DWORD dev, const char *unix_name,
       case FH_OSS_DSP:
 	fh = cnew (fhandler_dev_dsp) ();
 	break;
+      case FH_PROC:
+        fh = cnew (fhandler_proc) ();
+        break;
+      case FH_REGISTRY:
+        fh = cnew (fhandler_registry) ();
+        break;
+      case FH_PROCESS:
+        fh = cnew (fhandler_process) ();
+        break;
       default:
 	system_printf ("internal error -- unknown device - %p", dev);
 	fh = NULL;
diff --git a/winsup/cygwin/fhandler.cc b/winsup/cygwin/fhandler.cc
index abddc6000..dd7aeb2e7 100644
--- a/winsup/cygwin/fhandler.cc
+++ b/winsup/cygwin/fhandler.cc
@@ -148,7 +148,8 @@ fhandler_base::get_readahead_into_buffer (char *buf, size_t buflen)
 /* Record the file name.
    Filenames are used mostly for debugging messages, and it's hoped that
    in cases where the name is really required, the filename wouldn't ever
-   be too long (e.g. devices or some such).  */
+   be too long (e.g. devices or some such).
+   The unix_path_name is also used by virtual fhandlers.  */
 void
 fhandler_base::set_name (const char *unix_path, const char *win32_path, int unit)
 {
diff --git a/winsup/cygwin/fhandler.h b/winsup/cygwin/fhandler.h
index cc54024be..aa0b6ccee 100644
--- a/winsup/cygwin/fhandler.h
+++ b/winsup/cygwin/fhandler.h
@@ -70,8 +70,11 @@ enum
   FH_CLIPBOARD = 0x00000017,	/* is a clipboard device */
   FH_OSS_DSP = 0x00000018,	/* is a dsp audio device */
   FH_CYGDRIVE= 0x00000019,	/* /cygdrive/x */
+  FH_PROC    = 0x0000001a,      /* /proc */
+  FH_REGISTRY =0x0000001b,      /* /proc/registry */
+  FH_PROCESS = 0x0000001c,      /* /proc/<n> */
 
-  FH_NDEV    = 0x0000001a,	/* Maximum number of devices */
+  FH_NDEV    = 0x0000001d,      /* Maximum number of devices */
   FH_DEVMASK = 0x00000fff,	/* devices live here */
   FH_BAD     = 0xffffffff
 };
@@ -100,6 +103,8 @@ enum
 extern const char *windows_device_names[];
 extern struct __cygwin_perfile *perfile_table;
 #define __fmode (*(user_data->fmode_ptr))
+extern const char proc[];
+extern const int proc_len;
 
 class select_record;
 class path_conv;
@@ -280,7 +285,7 @@ class fhandler_base
   /* fixup fd possibly non-inherited handles after fork */
   void fork_fixup (HANDLE parent, HANDLE &h, const char *name);
 
-  virtual int open (path_conv * real_path, int flags, mode_t mode = 0);
+  virtual int open (path_conv *real_path, int flags, mode_t mode = 0);
   virtual int close ();
   virtual int __stdcall fstat (struct __stat64 *buf, path_conv *) __attribute__ ((regparm (3)));
   virtual int ioctl (unsigned int cmd, void *);
@@ -512,16 +517,16 @@ class fhandler_dev_tape: public fhandler_dev_raw
  public:
   fhandler_dev_tape (int unit);
 
-  int open (path_conv *, int flags, mode_t mode = 0);
-  int close (void);
+  virtual int open (path_conv *, int flags, mode_t mode = 0);
+  virtual int close (void);
 
-  __off64_t lseek (__off64_t offset, int whence);
+  virtual __off64_t lseek (__off64_t offset, int whence);
 
-  int __stdcall fstat (struct __stat64 *buf, path_conv *) __attribute__ ((regparm (3)));
+  virtual int __stdcall fstat (struct __stat64 *buf, path_conv *) __attribute__ ((regparm (3)));
 
-  int dup (fhandler_base *child);
+  virtual int dup (fhandler_base *child);
 
-  int ioctl (unsigned int cmd, void *buf);
+  virtual int ioctl (unsigned int cmd, void *buf);
 
  private:
   int tape_write_marks (int marktype, DWORD len);
@@ -1034,6 +1039,71 @@ class fhandler_dev_dsp : public fhandler_base
   void fixup_after_exec (HANDLE);
 };
 
+class fhandler_virtual : public fhandler_base
+{
+ protected:
+  char *filebuf;
+  int bufalloc, filesize;
+  __off32_t position;
+ public:
+
+  fhandler_virtual (DWORD devtype);
+  virtual ~fhandler_virtual();
+
+  virtual int exists(const char *path);
+  DIR *opendir (path_conv& pc);
+  __off64_t telldir (DIR *);
+  void seekdir (DIR *, __off32_t);
+  void rewinddir (DIR *);
+  int closedir (DIR *);
+  int write (const void *ptr, size_t len);
+  int __stdcall read (void *ptr, size_t len) __attribute__ ((regparm (3)));
+  __off64_t lseek (__off32_t, int);
+  int dup (fhandler_base * child);
+  int open (path_conv *, int flags, mode_t mode = 0);
+  int close (void);
+  int __stdcall fstat (struct stat *buf, path_conv *pc) __attribute__ ((regparm (3)));
+};
+
+class fhandler_proc: public fhandler_virtual
+{
+ public:
+  fhandler_proc ();
+  fhandler_proc (DWORD devtype);
+  int exists(const char *path);
+  struct dirent *readdir (DIR *);
+  static DWORD get_proc_fhandler(const char *path);
+
+  int open (path_conv *real_path, int flags, mode_t mode = 0);
+  int __stdcall fstat (struct __stat64 *buf, path_conv *) __attribute__ ((regparm (3)));
+};
+
+class fhandler_registry: public fhandler_proc
+{
+ public:
+  fhandler_registry ();
+  int exists(const char *path);
+  struct dirent *readdir (DIR *);
+  __off64_t telldir (DIR *);
+  void seekdir (DIR *, __off32_t);
+  void rewinddir (DIR *);
+  int closedir (DIR *);
+
+  int open (path_conv *real_path, int flags, mode_t mode = 0);
+  int __stdcall fstat (struct __stat64 *buf, path_conv *) __attribute__ ((regparm (3)));
+  HKEY open_key(const char *name, REGSAM access = KEY_READ, bool isValue = false);
+};
+
+class fhandler_process: public fhandler_proc
+{
+ public:
+  fhandler_process ();
+  int exists(const char *path);
+  struct dirent *readdir (DIR *);
+  int open (path_conv *real_path, int flags, mode_t mode = 0);
+  int __stdcall fstat (struct __stat64 *buf, path_conv *) __attribute__ ((regparm (3)));
+};
+
 typedef union
 {
   char base[sizeof(fhandler_base)];
@@ -1049,7 +1119,10 @@ typedef union
   char dev_zero[sizeof(fhandler_dev_zero)];
   char disk_file[sizeof(fhandler_disk_file)];
   char pipe[sizeof(fhandler_pipe)];
+  char proc[sizeof(fhandler_proc)];
+  char process[sizeof(fhandler_process)];
   char pty_master[sizeof(fhandler_pty_master)];
+  char registry[sizeof(fhandler_registry)];
   char serial[sizeof(fhandler_serial)];
   char socket[sizeof(fhandler_socket)];
   char termios[sizeof(fhandler_termios)];
diff --git a/winsup/cygwin/path.cc b/winsup/cygwin/path.cc
index e95f6caf1..0b5ef06e9 100644
--- a/winsup/cygwin/path.cc
+++ b/winsup/cygwin/path.cc
@@ -118,6 +118,12 @@ int pcheck_case = PCHECK_RELAXED; /* Determines the case check behaviour. */
    (isdirsep(path[mount_table->cygdrive_len + 1]) || \
     !path[mount_table->cygdrive_len + 1]))
 
+#define isproc(path) \
+  (path_prefix_p (proc, (path), proc_len))
+
+#define isvirtual_dev(devn) \
+  (devn == FH_CYGDRIVE || devn == FH_PROC || devn == FH_REGISTRY || devn == FH_PROCESS)
+
 /* Return non-zero if PATH1 is a prefix of PATH2.
    Both are assumed to be of the same path style and / vs \ usage.
    Neither may be "".
@@ -173,7 +179,7 @@ pathmatch (const char *path1, const char *path2)
 
 #define isslash(c) ((c) == '/')
 
-int
+static int
 normalize_posix_path (const char *src, char *dst)
 {
   const char *src_start = src;
@@ -362,6 +368,12 @@ path_conv::update_fs_info (const char* win32_path)
     }
 }
 
+path_conv::~path_conv ()
+{
+  if (normalized_path)
+    cfree (normalized_path);
+}
+
 /* Convert an arbitrary path SRC to a pure Win32 path, suitable for
    passing to Win32 API routines.
 
@@ -413,6 +425,7 @@ path_conv::check (const char *src, unsigned opt,
   sym_opt = 0;
   drive_type = 0;
   is_remote_drive = 0;
+  normalized_path = NULL;
 
   if (!(opt & PC_NULLEMPTY))
     error = 0;
@@ -494,6 +507,28 @@ path_conv::check (const char *src, unsigned opt,
 		}
 	      goto out;
 	    }
+          else if (isvirtual_dev (devn))
+            {
+              fhandler_virtual *fh =
+                (fhandler_virtual *) cygheap->fdtab.build_fhandler (-1, devn, path_copy, NULL, unit);
+              int file_type = fh->exists (path_copy);
+              switch (file_type)
+                {
+                  case 0:
+                    error = ENOENT;
+		    break;
+                  case 1:
+                  case 2:
+                    fileattr = FILE_ATTRIBUTE_DIRECTORY;
+		    break;
+                  case -1:
+                    fileattr = 0;
+                }
+              delete fh;
+	      if (!error)
+		strcpy (path, path_copy);
+	      goto out;
+            }
 	  /* devn should not be a device.  If it is, then stop parsing now. */
 	  else if (devn != FH_BAD)
 	    {
@@ -683,6 +718,8 @@ path_conv::check (const char *src, unsigned opt,
     add_ext_from_sym (sym);
 
 out:
+  if (opt & PC_POSIX)
+    normalized_path = cstrdup (path_copy);
   /* Deal with Windows stupidity which considers filename\. to be valid
      even when "filename" is not a directory. */
   if (!need_directory || error)
@@ -1409,6 +1446,14 @@ mount_info::conv_to_win32_path (const char *src_path, char *dst,
       else if (mount_table->cygdrive_len > 1)
 	return ENOENT;
     }
+  if (isproc (pathbuf))
+    {
+      devn = fhandler_proc::get_proc_fhandler (pathbuf);
+      dst[0] = '\0';
+      if (devn == FH_BAD)
+        return ENOENT;
+      goto out;
+    }
 
   int chrooted_path_len;
   chrooted_path_len = 0;
@@ -1476,7 +1521,7 @@ mount_info::conv_to_win32_path (const char *src_path, char *dst,
       *flags = mi->flags;
     }
 
-  if (devn != FH_CYGDRIVE)
+  if (!isvirtual_dev (devn))
     win32_device_name (src_path, dst, devn, unit);
 
  out:
@@ -3237,7 +3282,8 @@ chdir (const char *in_dir)
       path.get_win32 ()[3] = '\0';
     }
   int res;
-  if (path.get_devn () != FH_CYGDRIVE)
+  int devn = path.get_devn();
+  if (!isvirtual_dev (devn))
     res = SetCurrentDirectory (native_dir) ? 0 : -1;
   else
     {
@@ -3257,8 +3303,8 @@ chdir (const char *in_dir)
      we'll see if Cygwin mailing list users whine about the current behavior. */
   if (res == -1)
     __seterrno ();
-  else if (!path.has_symlinks () && strpbrk (dir, ":\\") == NULL
-	   && pcheck_case == PCHECK_RELAXED)
+  else if ((!path.has_symlinks () && strpbrk (dir, ":\\") == NULL
+            && pcheck_case == PCHECK_RELAXED) || isvirtual_dev (devn))
     cygheap->cwd.set (native_dir, dir);
   else
     cygheap->cwd.set (native_dir, NULL);
diff --git a/winsup/cygwin/path.h b/winsup/cygwin/path.h
index ea3a6545a..1daaa11d8 100644
--- a/winsup/cygwin/path.h
+++ b/winsup/cygwin/path.h
@@ -23,7 +23,8 @@ enum pathconv_arg
   PC_SYM_CONTENTS	= 0x0008,
   PC_FULL		= 0x0010,
   PC_NULLEMPTY		= 0x0020,
-  PC_CHECK_EA		= 0x0040
+  PC_CHECK_EA		= 0x0040,
+  PC_POSIX		= 0x0080
 };
 
 enum case_checking
@@ -75,6 +76,7 @@ class path_conv
   int unit;
   DWORD fileattr;
   BOOL case_clash;
+  char *normalized_path;
 
   int isdisk () const { return path_flags & PATH_ISDISK;}
   int isremote () const {return is_remote_drive;}
@@ -126,9 +128,11 @@ class path_conv
 
   path_conv (): path_flags (0), known_suffix (NULL), error (0), devn (0), unit (0), fileattr (INVALID_FILE_ATTRIBUTES) {path[0] = '\0';}
 
+  ~path_conv ();
   inline char *get_win32 () { return path; }
-  operator char *() {return path; }
-  operator DWORD &() {return fileattr; }
+  operator char *() {return path;}
+  operator const char *() {return path;}
+  operator DWORD &() {return fileattr;}
   operator int &() {return (int) fileattr; }
   BOOL is_device () {return devn != FH_BAD && devn != FH_DISK;}
   DWORD get_devn () {return devn == FH_BAD ? (DWORD) FH_DISK : devn;}
@@ -178,3 +182,5 @@ has_exec_chars (const char *buf, int len)
 
 int pathmatch (const char *path1, const char *path2) __attribute__ ((regparm (2)));
 int pathnmatch (const char *path1, const char *path2, int len) __attribute__ ((regparm (2)));
+
+int path_prefix_p (const char *path1, const char *path2, int len1) __attribute__ ((regparm (3)));
diff --git a/winsup/cygwin/pinfo.h b/winsup/cygwin/pinfo.h
index dc16966b9..cad2c4a5b 100644
--- a/winsup/cygwin/pinfo.h
+++ b/winsup/cygwin/pinfo.h
@@ -39,7 +39,7 @@ public:
      we only use this handle from the parent. */
   HANDLE hProcess;
 
-#define PINFO_REDIR_SIZE ((DWORD) &(((_pinfo *)NULL)->hProcess) + sizeof (DWORD))
+#define PINFO_REDIR_SIZE ((char *) &myself.procinfo->hProcess - (char *) myself.procinfo)
 
   /* Handle associated with initial Windows pid which started it all. */
   HANDLE pid_handle;
diff --git a/winsup/cygwin/syscalls.cc b/winsup/cygwin/syscalls.cc
index 1613d7b8d..b549f9530 100644
--- a/winsup/cygwin/syscalls.cc
+++ b/winsup/cygwin/syscalls.cc
@@ -39,8 +39,6 @@ details. */
 #include "shared_info.h"
 #include "cygheap.h"
 
-extern int normalize_posix_path (const char *, char *);
-
 SYSTEM_INFO system_info;
 
 /* Close all files and process any queued deletions.
@@ -2207,7 +2205,7 @@ extern "C" int
 chroot (const char *newroot)
 {
   sigframe thisframe (mainthread);
-  path_conv path (newroot, PC_SYM_FOLLOW | PC_FULL);
+  path_conv path (newroot, PC_SYM_FOLLOW | PC_FULL | PC_POSIX);
 
   int ret;
   if (path.error)
@@ -2224,9 +2222,7 @@ chroot (const char *newroot)
     }
   else
     {
-      char buf[MAX_PATH];
-      normalize_posix_path (newroot, buf);
-      cygheap->root.set (buf, path);
+      cygheap->root.set (path.normalized_path, path);
       ret = 0;
     }
 
diff --git a/winsup/cygwin/winsup.h b/winsup/cygwin/winsup.h
index ea9251aaf..1c039a7f1 100644
--- a/winsup/cygwin/winsup.h
+++ b/winsup/cygwin/winsup.h
@@ -269,6 +269,9 @@ extern SYSTEM_INFO system_info;
 #define STD_RBITS (S_IRUSR | S_IRGRP | S_IROTH)
 #define STD_WBITS (S_IWUSR)
 #define STD_XBITS (S_IXUSR | S_IXGRP | S_IXOTH)
+#define NO_W ~(S_IWUSR | S_IWGRP | S_IWOTH)
+#define NO_R ~(S_IRUSR | S_IRGRP | S_IROTH)
+#define NO_X ~(S_IXUSR | S_IXGRP | S_IXOTH)
 
 /* The title on program start. */
 extern char *old_title;