* dcrt0.cc (dummy_autoload): Add load statement for RegDeleteValueA.

* external.cc (get_cygdrive_prefixes): New function.
(cygwin_internal): Add CW_GET_CYGDRIVE_PREFIXES case.
* path.cc (mount_info::read_cygdrive_info_from_registry): Read system cygdrive
prefix if user one is undefined.
(mount_info::write_cygdrive_info_to_registry): Write cygdrive prefix to the
appropriate registry hive.  Overwrite in-memory copy of cygdrive, if
appropriate.
(mount_info::remove_cygdrive_info_from_registry): New method.
(mount_info::get_cygdrive_prefixes): New method.
(cygwin_umount): Remove cygdrive prefix, if appropriate.
* registry.cc (reg_key::killvalue): New method.
* shared.h (class reg_key): Add killvalue, remove_cygdrive_info_to_registry,
and get_cygdrive_prefixes declarations.
* include/sys/cygwin.h (cygwin_getinfo_types): Add CW_GET_CYGDRIVE_PREFIXES.

1 files changed, 3 insertions, 0 deletions

diff --git a/winsup/cygwin/shared.h b/winsup/cygwin/shared.h
index d6e465544..fa14492cb 100644
--- a/winsup/cygwin/shared.h
+++ b/winsup/cygwin/shared.h
@@ -247,6 +247,7 @@ public:
   int error () {return key == (HKEY) INVALID_HANDLE_VALUE;}
 
   int kill (const char *child);
+  int killvalue (const char *name);
 
   HKEY get_key ();
   int get_int (const char *,int def);
@@ -336,6 +337,8 @@ public:
   struct mntent *getmntent (int x);
 
   int write_cygdrive_info_to_registry (const char *cygdrive_prefix, unsigned flags);
+  int remove_cygdrive_info_from_registry (const char *cygdrive_prefix, unsigned flags);
+  int get_cygdrive_prefixes (char *user, char *system);
 
   void import_v1_mounts ();