Cygwin: Revert attempting to unload user profile after use

Revert "Cywin: user profile: unload impersonation user profile on exit"
Revert "Cygwin: seteuid: allow inheriting impersonation user profile handle"
Revert "Cygwin: user profile: add debug output to unload_user_profile"
Revert "Cygwin: user profile: Make an effort to unload unused user profiles"

This reverts commit bcb33dc4f0.
This reverts commit dd3730ed9c.
This reverts commit 8eee25241e.
This reverts commit 71b8777a71.

This patchset actually results in the following problem:

- After a couple of ssh logon/logoff attempts, an interactive session
  of the same user loging in, is broken.

Apparently UnloadUserProfile manages to unload the user's profile
even while a parallel interactive session still uses the user's
profile.

Signed-off-by: Corinna Vinschen <corinna@vinschen.de>

winsup/cygwin/autoload.cc

@@ -699,7 +699,6 @@ LoadDLLfuncEx (CreateEnvironmentBlock, 12, userenv, 1)
 LoadDLLfuncEx2 (CreateProfile, 16, userenv, 1, 1)
 LoadDLLfunc (DestroyEnvironmentBlock, 4, userenv)
 LoadDLLfunc (LoadUserProfileW, 8, userenv)
-LoadDLLfunc (UnloadUserProfile, 8, userenv)
 
 LoadDLLfuncEx3 (waveInAddBuffer, 12, winmm, 1, 0, 1)
 LoadDLLfuncEx3 (waveInClose, 4, winmm, 1, 0, 1)

winsup/cygwin/cygheap.h

@@ -106,9 +106,6 @@ public:
   HANDLE curr_primary_token;	 /* Just a copy of external or internal token */
   HANDLE curr_imp_token;	 /* impersonation token derived from primary
 				    token */
-  HANDLE imp_profile_token;	 /* Handle to the token used to load the
-				    user profile in "imp_profile" */
-  HANDLE imp_profile;		 /* Handle to the user profile */
   bool ext_token_is_restricted;  /* external_token is restricted token */
   bool curr_token_is_restricted; /* curr_primary_token is restricted token */
   bool setuid_to_restricted;     /* switch to restricted token by setuid () */
@@ -193,11 +190,6 @@ public:
   {
     return effec_cygsid.string (buf);
   }
-  void exit ()
-  {
-    if (imp_profile_token && imp_profile)
-      unload_user_profile (imp_profile_token, imp_profile);
-  }
 
   const char __reg3 *test_uid (char *&, const char *, size_t);
 };

winsup/cygwin/pinfo.cc

@@ -224,7 +224,6 @@ pinfo::exit (DWORD n)
     exitcode = ((exitcode & 0xff) << 8) | ((exitcode >> 8) & 0xff);
   sigproc_printf ("Calling dlls.cleanup_forkables n %y, exitcode %y", n, exitcode);
   dlls.cleanup_forkables ();
-  cygheap->user.exit ();
   sigproc_printf ("Calling ExitProcess n %y, exitcode %y", n, exitcode);
   if (!TerminateProcess (GetCurrentProcess (), exitcode))
     system_printf ("TerminateProcess failed, %E");

winsup/cygwin/sec_auth.cc

@@ -316,15 +316,6 @@ load_user_profile (HANDLE token, struct passwd *pw, cygpsid &usersid)
   return pi.hProfile;
 }
 
-bool
-unload_user_profile (HANDLE token, HANDLE profile)
-{
-  bool ret = UnloadUserProfile (token, profile);
-  if (!ret)
-    debug_printf ("UnloadUserProfile, %E");
-  return ret;
-}
-
 HANDLE
 lsa_open_policy (PWCHAR server, ACCESS_MASK access)
 {

winsup/cygwin/security.h

@@ -502,7 +502,6 @@ PWCHAR get_user_profile_directory (PCWSTR sidstr, PWCHAR path, SIZE_T path_len);
 
 /* Load user profile if it's not already loaded. */
 HANDLE load_user_profile (HANDLE token, struct passwd *pw, cygpsid &sid);
-bool unload_user_profile (HANDLE token, HANDLE profile);
 
 HANDLE lsa_open_policy (PWCHAR server, ACCESS_MASK access);
 void lsa_close_policy (HANDLE lsa);

winsup/cygwin/syscalls.cc

@@ -3603,21 +3603,8 @@ seteuid32 (uid_t uid)
     {
       NTSTATUS status;
 
-      if (!request_restricted_uid_switch
+      if (!request_restricted_uid_switch)
-	  && new_token != cygheap->user.imp_profile_token)
+	load_user_profile (new_token, pw_new, usersid);
-	{
-	  if (cygheap->user.imp_profile_token && cygheap->user.imp_profile)
-	    unload_user_profile (cygheap->user.imp_profile_token,
-				 cygheap->user.imp_profile);
-	  cygheap->user.imp_profile = load_user_profile (new_token, pw_new,
-							 usersid);
-	  if (cygheap->user.imp_profile)
-	    {
-	      cygheap->user.imp_profile_token = new_token;
-	      SetHandleInformation (cygheap->user.imp_profile,
-				    HANDLE_FLAG_INHERIT, HANDLE_FLAG_INHERIT);
-	    }
-	}
 
       /* Try setting owner to same value as user. */
       status = NtSetInformationToken (new_token, TokenOwner,

winsup/cygwin/uinfo.cc

@@ -239,8 +239,6 @@ uinfo_init ()
   cygheap->user.internal_token = NO_IMPERSONATION;
   cygheap->user.curr_primary_token = NO_IMPERSONATION;
   cygheap->user.curr_imp_token = NO_IMPERSONATION;
-  cygheap->user.imp_profile_token = NO_IMPERSONATION;
-  cygheap->user.imp_profile = NULL;
   cygheap->user.ext_token_is_restricted = false;
   cygheap->user.curr_token_is_restricted = false;
   cygheap->user.setuid_to_restricted = false;