* 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, 15 insertions, 0 deletions

diff --git a/winsup/cygwin/external.cc b/winsup/cygwin/external.cc
index e626cf5ef..f187d9779 100644
--- a/winsup/cygwin/external.cc
+++ b/winsup/cygwin/external.cc
@@ -63,6 +63,14 @@ fillout_pinfo (DWORD pid)
   return &ep;
 }
 
+static DWORD
+get_cygdrive_prefixes (char *user, char *system)
+{
+  shared_info *info = cygwin_getshared();
+  int res = info->mount.get_cygdrive_prefixes(user, system);
+  return (res == ERROR_SUCCESS) ? 1 : 0;
+}
+
 extern "C" DWORD
 cygwin_internal (cygwin_getinfo_types t, ...)
 {
@@ -107,6 +115,13 @@ cygwin_internal (cygwin_getinfo_types t, ...)
 	perfile_table = va_arg (arg, struct __cygwin_perfile *);
 	return 0;
 
+      case CW_GET_CYGDRIVE_PREFIXES:
+	{
+	  char *user = va_arg (arg, char *);
+	  char *system = va_arg (arg, char *);
+	  return get_cygdrive_prefixes (user, system);
+	}
+
       default:
 	return (DWORD) -1;
     }