* autoload.cc (GetModuleFileNameExA): Add.

(GetModuleInformation): Add.
	(QueryWorkingSet): Add.
	* fhandler.h (fhandler_virtual::get_filebuf): New method.
	* fhandler_proc.cc (PROC_SELF): Define.
	(proc_fhandlers): Change type of self to FH_PROC.
	(fhandler_proc::exists): Return -3 if self.
	(fhandler_proc::fstat): Handle self as symlink.
	(fhandler_proc::fill_filebuf): Handle self.
	* fhandler_process.cc: Include psapi.h.
	(PROCESS_EXENAME): Remove.
	(PROCESS_MAPS): Define.
	(PROCESS_ROOT): Define.
	(PROCESS_EXE): Define.
	(PROCESS_CWD): Define.
	(process_listing): Remove "exename", add "maps, "root", "exe" and
	"cwd" elements.
	(fhandler_process::exists): Return -2 for symlinks.
	(fhandler_process::fstat): Handle symlinks.
	(fill_filebuf): Evaluate pid if pid is 0.  Use exename handling for
	exe.  Handle maps, root and cwd.
	(format_process_maps): New function evaluating "maps".
	* path.cc (symlink_info::set): New method to fill symlink_info
	with data matching virtual symlinks.
	(path_conv::check): Handle virtual symlinks.
	* pinfo.cc (_pinfo::commune_recv): Add PICOM_CWD and PICOM_ROOT
	handling.
	(_pinfo::commune_send): Ditto.
	(_pinfo::root): New function.
	(_pinfo::cwd): New function.
	* pinfo.h (enum picom): Add PICOM_CWD and PICOM_ROOT.
	(_pinfo::root): Declare.
	(_pinfo::cwd): Declare.

winsup/cygwin/pinfo.h

@@ -23,7 +23,9 @@ struct commune_result
 enum picom
 {
   PICOM_CMDLINE = 1,
-  PICOM_FIFO = 2
+  PICOM_FIFO = 2,
+  PICOM_CWD = 3,
+  PICOM_ROOT = 4
 };
 
 #define EXITCODE_SET 0x80000000
@@ -106,6 +108,8 @@ public:
   void commune_recv ();
   commune_result commune_send (DWORD, ...);
   bool alive ();
+  char *root (size_t &);
+  char *cwd (size_t &);
   char *cmdline (size_t &);
   void set_ctty (class tty_min *, int, class fhandler_tty_slave *);
   bool dup_proc_pipe (HANDLE) __attribute__ ((regparm(2)));