* cygheap.cc (cwcsdup): New function.

(cwcsdup1): New function.
	* cygheap.h (cygheap_user::get_windows_id): New method returning PWCHAR.
	(cwcsdup): Declare.
	(cwcsdup1): Declare.
	* registry.cc (get_registry_hive_path): Use WCHAR instead of char
	throughout.
	(load_registry_hive): Ditto.
	* registry.h (get_registry_hive_path): Change declaration accordingly.
	(load_registry_hive): Ditto.
	* sec_helper.cc (cygpsid::string): New method returning PWCHAR.
	* security.h (cygpsid::string): Declare.
	* syscalls.cc (seteuid32): Convert local name var to WCHAR.
	* uinfo.cc (cygheap_user::env_userprofile): Convert local name buffers
	to WCHAR.  Call sys_wcstombs_alloc to generate puserprof buffer.

	* winsup.h: Fix comment.
	(NT_MAX_PATH): New definition for maximum internal path length.
	Use throughout where appropriate.
	* include/limits.h (PATH_MAX): Set to 4096 as on Linux.

winsup/cygwin/include/limits.h

@@ -321,10 +321,11 @@ details. */
 #undef NAME_MAX
 #define NAME_MAX 255
 
-/* Maximum length of a path including trailing NUL.
-   (32767 - max. native NT path prefix) */
+/* Maximum length of a path given to API functions including trailing NUL.
+   Deliberately set to the same default value as on Linux.  Internal paths
+   may be longer. */
 #undef PATH_MAX
-#define PATH_MAX 32760
+#define PATH_MAX 4096
 
 /* # of bytes in a pipe buf. This is the max # of bytes which can be
    written to a pipe in one atomic operation. */

winsup/cygwin/include/sys/cygwin.h

@@ -266,7 +266,7 @@ struct external_pinfo
   __gid32_t gid32;
 
   /* Only available if version >= EXTERNAL_PINFO_VERSION_32_LP */
-  char progname_long[PATH_MAX];
+  char progname_long[NT_MAX_PATH];
 };
 #endif /*__CYGWIN__*/
 #endif /*WINVER*/