* shared.cc (user_shared_initialize): Fetch potentially changed Cygwin

	username from /etc/passwd before loading mount table.
	(shared_info::init_installation_root): New function fetching Cygwin's
	installation root dir and storing as native NT path in global shared
	memory.
	(shared_info::initialize): Call init_installation_root exactly once at
	first startup.
	* shared_info.h (SHARED_INFO_CB): Accommodate change to shared_info.
	(CURR_SHARED_MAGIC): Ditto.
	(class shared_info): Add installation_root member.
	(shared_info::init_installation_root): Declare.

	* grp.cc (pwdgrp::read_group): Call pwdgrp::load with native WCHAR path.
	* passwd.cc (pwdgrp::read_passwd): Ditto.  Avoid recursion.
	(etc::init): Take POBJECT_ATTRIBUTES instead of path_conv.
	* path.h (etc::init): Change prototype accordingly.
	* pwdgrp.h (class pwdgrp): Store path as UNICODE_STRING/PWCHAR instead
	of as path_conv.
	(pwdgrp::load): Accommodate prototype.
	* uinfo.cc (pwdgrp::load): Change argument type from char to wchar_t.
	Create native NT path here instead of calling path_conv.

	* mount.cc (find_root_from_cygwin_dll): Drop in favor of global
	initializaion in shared_info.
	(mount_info::init): Fetch native NT root dir from cygwin_shared.
	(mount_info::from_fstab): Expect native NT path and use native NT
	functions to access file.  Convert username part in user fstab path
	according to special char transformation rules.
	* path.cc (tfx_chars): Convert slash to backslash.
	(transform_chars): Implement for path given as PWCHAR.
	(transform_chars): PUNICODE_STRING version calls PWCHAR version.
	Remove useless commented code.

1 files changed, 5 insertions, 2 deletions

diff --git a/winsup/cygwin/shared_info.h b/winsup/cygwin/shared_info.h
index 3b0036286..684a84a66 100644
--- a/winsup/cygwin/shared_info.h
+++ b/winsup/cygwin/shared_info.h
@@ -11,6 +11,7 @@ details. */
 #include "tty.h"
 #include "security.h"
 #include "mtinfo.h"
+#include "limits.h"
 
 /* Mount table entry */
 
@@ -117,9 +118,9 @@ public:
 				  cygwin_version.api_minor)
 #define SHARED_VERSION_MAGIC CYGWIN_VERSION_MAGIC (SHARED_MAGIC, SHARED_VERSION)
 
-#define SHARED_INFO_CB 31136
+#define SHARED_INFO_CB 39328
 
-#define CURR_SHARED_MAGIC 0x18da899eU
+#define CURR_SHARED_MAGIC 0x22f9ff0bU
 
 /* NOTE: Do not make gratuitous changes to the names or organization of the
    below class.  The layout is checksummed to determine compatibility between
@@ -135,10 +136,12 @@ class shared_info
   DWORD sys_mount_table_counter;
   tty_list tty;
   LONG last_used_bindresvport;
+  WCHAR installation_root[PATH_MAX];
   DWORD obcaseinsensitive;
   mtinfo mt;
 
   void initialize ();
+  void init_installation_root ();
   void init_obcaseinsensitive ();
   unsigned heap_chunk_size ();
   unsigned heap_slop_size ();