* Makefile.in (DLL_OFILES): Add tls_pbuf.o.

* autoload.cc (CreateDesktopW): Replace CreateDesktopA.
	(CreateWindowStationW): Replace CreateWindowStationA.
	(GetUserObjectInformationW): Replace GetUserObjectInformationA.
	* cygheap.h (cwdstuff::get): Assume default buffer size NT_MAX_PATH.
	* cygtls.cc (_cygtls::remove): Free temporary TLS path buffers.
	* cygtls.h (TP_NUM_C_BUFS): Define.
	(TP_NUM_W_BUFS): Define.
	(class tls_pathbuf): New class to store pointers to thread local
	temporary path buffers.
	(_local_storage::pathbufs): New member.
	* environ.cc (win_env::add_cache): Use temporary TLS path buffer instead
	of stack based buffer.
	(posify): Get temporary outenv buffer from calling function.
	(environ_init): Create temporary TLS path buffer for posify.
	(build_env): Create Windows environment block as WCHAR buffer.
	* environ.h (build_env): Change declaration accordingly.
	* external.cc (sync_winenv): Accommodate build_env change.
	* fhandler_console.cc (fhandler_console::need_invisible): Use
	GetUserObjectInformationW and CreateWindowStationW.
	* fhandler_process.cc (format_process_maps): Use temporary TLS path
	buffer instead of stack based buffer.
	* fork.cc (frok::parent): Convert to use CreateProcessW.
	* path.cc: Throughout use temporary TLS path buffers instead of stack
	based buffer.  Replace checks for CYG_MAX_PATH by checks for
	NT_MAX_PATH.
	(getfileattr): New function to replace GetFileAttributesA.
	(normalize_win32_path): Remove Win32 and NT long path prefixes.
	(getwd): Assume PATH_MAX + 1 buffer per SUSv3.
	* path.h (class path_conv): Set path buffer to size NT_MAX_PATH.
	(iswdrive): Define.
	* pinfo.cc (commune_process): Use temporary TLS path buffer instead of
	stack based buffer.
	* registry.cc (get_registry_hive_path): Ditto.
	(load_registry_hive): Ditto.
	* spawn.cc (spawn_guts): Convert to use CreateProcessW and
	CreateProcessAsUserW.
	(av::fixup): Open/close file using NtOpenFile/NtClose.
	* syscalls.cc (mknod_worker): Allow PATH_MAX file name.
	(mknod32): Ditto.
	(getusershell): Ditto.
	* tls_pbuf.cc: New file implementing tls_pathbuf and tmp_pathbuf
	methods.
	* tls_pbuf.h: New header for files using tmp_pathbuf.
	* tlsoffsets.h: Regenerate.
	* winsup.h (NT_MAX_PATH): Define as 32767 to avoid USHORT overflow.

winsup/cygwin/tlsoffsets.h

@@ -1,6 +1,6 @@
 //;# autogenerated:  Do not edit.
 
-//; $tls::sizeof__cygtls = 4196;
+//; $tls::sizeof__cygtls = 4284;
 //; $tls::func = -12700;
 //; $tls::pfunc = 0;
 //; $tls::el = -12696;
@@ -39,30 +39,30 @@
 //; $tls::p__dontuse = 420;
 //; $tls::locals = -11216;
 //; $tls::plocals = 1484;
-//; $tls::_ctinfo = -9600;
-//; $tls::p_ctinfo = 3100;
-//; $tls::andreas = -9596;
-//; $tls::pandreas = 3104;
-//; $tls::wq = -9588;
-//; $tls::pwq = 3112;
-//; $tls::prev = -9560;
-//; $tls::pprev = 3140;
-//; $tls::next = -9556;
-//; $tls::pnext = 3144;
-//; $tls::sig = -9552;
-//; $tls::psig = 3148;
-//; $tls::incyg = -9548;
-//; $tls::pincyg = 3152;
-//; $tls::spinning = -9544;
-//; $tls::pspinning = 3156;
-//; $tls::stacklock = -9540;
-//; $tls::pstacklock = 3160;
-//; $tls::stackptr = -9536;
-//; $tls::pstackptr = 3164;
-//; $tls::stack = -9532;
-//; $tls::pstack = 3168;
-//; $tls::initialized = -8508;
-//; $tls::pinitialized = 4192;
+//; $tls::_ctinfo = -9512;
+//; $tls::p_ctinfo = 3188;
+//; $tls::andreas = -9508;
+//; $tls::pandreas = 3192;
+//; $tls::wq = -9500;
+//; $tls::pwq = 3200;
+//; $tls::prev = -9472;
+//; $tls::pprev = 3228;
+//; $tls::next = -9468;
+//; $tls::pnext = 3232;
+//; $tls::sig = -9464;
+//; $tls::psig = 3236;
+//; $tls::incyg = -9460;
+//; $tls::pincyg = 3240;
+//; $tls::spinning = -9456;
+//; $tls::pspinning = 3244;
+//; $tls::stacklock = -9452;
+//; $tls::pstacklock = 3248;
+//; $tls::stackptr = -9448;
+//; $tls::pstackptr = 3252;
+//; $tls::stack = -9444;
+//; $tls::pstack = 3256;
+//; $tls::initialized = -8420;
+//; $tls::pinitialized = 4280;
 //; __DATA__
 
 #define tls_func (-12700)
@@ -103,27 +103,27 @@
 #define tls_p__dontuse (420)
 #define tls_locals (-11216)
 #define tls_plocals (1484)
-#define tls__ctinfo (-9600)
-#define tls_p_ctinfo (3100)
-#define tls_andreas (-9596)
-#define tls_pandreas (3104)
-#define tls_wq (-9588)
-#define tls_pwq (3112)
-#define tls_prev (-9560)
-#define tls_pprev (3140)
-#define tls_next (-9556)
-#define tls_pnext (3144)
-#define tls_sig (-9552)
-#define tls_psig (3148)
-#define tls_incyg (-9548)
-#define tls_pincyg (3152)
-#define tls_spinning (-9544)
-#define tls_pspinning (3156)
-#define tls_stacklock (-9540)
-#define tls_pstacklock (3160)
-#define tls_stackptr (-9536)
-#define tls_pstackptr (3164)
-#define tls_stack (-9532)
-#define tls_pstack (3168)
-#define tls_initialized (-8508)
-#define tls_pinitialized (4192)
+#define tls__ctinfo (-9512)
+#define tls_p_ctinfo (3188)
+#define tls_andreas (-9508)
+#define tls_pandreas (3192)
+#define tls_wq (-9500)
+#define tls_pwq (3200)
+#define tls_prev (-9472)
+#define tls_pprev (3228)
+#define tls_next (-9468)
+#define tls_pnext (3232)
+#define tls_sig (-9464)
+#define tls_psig (3236)
+#define tls_incyg (-9460)
+#define tls_pincyg (3240)
+#define tls_spinning (-9456)
+#define tls_pspinning (3244)
+#define tls_stacklock (-9452)
+#define tls_pstacklock (3248)
+#define tls_stackptr (-9448)
+#define tls_pstackptr (3252)
+#define tls_stack (-9444)
+#define tls_pstack (3256)
+#define tls_initialized (-8420)
+#define tls_pinitialized (4280)