* cygheap.h (cygheap_user::sid): Return reference to cygpsid rather

than PSID.
	(cygheap_user::saved_sid): Ditto.
	(cygheap_pwdgrp::cache_t): New type.
	(cygheap_pwdgrp::caching): Convert to cache_t.
	(cygheap_pwdgrp::nss_db_caching): Change accordingly.
	(cygheap_pwdgrp::nss_db_full_caching): New inline method.
	* grp.cc (internal_getgroups): Reinvent.  Take cyg_ldap pointer as
	third parameter and use throughout.
	(getgroups32): Call internal_getgroups.
	* pwdgrp.h (internal_getgroups): Declare.
	* uinfo.cc (internal_getlogin): Partial rewrite to accommodate having
	no connection to the DC.  Give primary group from user token more
	weight.  Generate group entries for all groups in the user token if
	caching is set to NSS_FULL_CACHING.
	(cygheap_pwdgrp::init): Initialize caching to NSS_FULL_CACHING.
	(cygheap_pwdgrp::nss_init_line): Handle "db_cache: full".
	(pwdgrp::add_account_from_windows): Fix group handling in non-caching
	mode.
	(pwdgrp::fetch_account_from_windows): Default primary group for the
	current user to primary group from user token.  Check for primary
	domain first after LookupAccountSid failed.

winsup/cygwin/ChangeLog

@@ -1,3 +1,28 @@
+2014-02-28  Corinna Vinschen  <corinna@vinschen.de>
+
+	* cygheap.h (cygheap_user::sid): Return reference to cygpsid rather
+	than PSID.
+	(cygheap_user::saved_sid): Ditto.
+	(cygheap_pwdgrp::cache_t): New type.
+	(cygheap_pwdgrp::caching): Convert to cache_t.
+	(cygheap_pwdgrp::nss_db_caching): Change accordingly.
+	(cygheap_pwdgrp::nss_db_full_caching): New inline method.
+	* grp.cc (internal_getgroups): Reinvent.  Take cyg_ldap pointer as
+	third parameter and use throughout.
+	(getgroups32): Call internal_getgroups.
+	* pwdgrp.h (internal_getgroups): Declare.
+	* uinfo.cc (internal_getlogin): Partial rewrite to accommodate having
+	no connection to the DC.  Give primary group from user token more
+	weight.  Generate group entries for all groups in the user token if
+	caching is set to NSS_FULL_CACHING.
+	(cygheap_pwdgrp::init): Initialize caching to NSS_FULL_CACHING.
+	(cygheap_pwdgrp::nss_init_line): Handle "db_cache: full".
+	(pwdgrp::add_account_from_windows): Fix group handling in non-caching
+	mode.
+	(pwdgrp::fetch_account_from_windows): Default primary group for the
+	current user to primary group from user token.  Check for primary
+	domain first after LookupAccountSid failed.
+
 2014-02-27  Corinna Vinschen  <corinna@vinschen.de>
 
 	* autoload.cc (CheckTokenMembership): Import.

winsup/cygwin/cygheap.h

@@ -156,8 +156,8 @@ public:
   }
   void set_sid (PSID new_sid) { effec_cygsid = new_sid;}
   void set_saved_sid () { saved_cygsid = effec_cygsid; }
-  PSID sid () { return effec_cygsid; }
+  cygpsid &sid () { return effec_cygsid; }
-  PSID saved_sid () { return saved_cygsid; }
+  cygpsid &saved_sid () { return saved_cygsid; }
   const char *ontherange (homebodies what, struct passwd * = NULL);
 #define NO_IMPERSONATION NULL
   bool issetuid () const { return curr_imp_token != NO_IMPERSONATION; }
@@ -400,12 +400,17 @@ class cygheap_pwdgrp
     NSS_PRIMARY,
     NSS_ALWAYS
   };
+  enum cache_t {
+    NSS_NO_CACHING = 0,
+    NSS_CACHING,
+    NSS_FULL_CACHING
+  };
   bool    nss_inited;
   int     pwd_src;
   int     grp_src;
   pfx_t   prefix;
   WCHAR   separator[2];
-  bool   caching;
+  cache_t caching;
   int	  enums;
   PWCHAR  enum_tdoms;
 
@@ -433,7 +438,9 @@ public:
   inline bool nss_prefix_primary () const { return prefix == NSS_PRIMARY; }
   inline bool nss_prefix_always () const { return prefix == NSS_ALWAYS; }
   inline PCWSTR nss_separator () const { return separator; }
-  inline bool nss_db_caching () const { return caching; }
+  inline bool nss_db_caching () const { return caching != NSS_NO_CACHING; }
+  inline bool nss_db_full_caching () const
+				      { return caching == NSS_FULL_CACHING; }
   inline int nss_db_enums () const { return enums; }
   inline PCWSTR nss_db_enum_tdoms () const { return enum_tdoms; }
 };

winsup/cygwin/grp.cc

@@ -459,21 +459,20 @@ endgrent_filtered (void *gr)
   ((gr_ent *) gr)->endgrent ();
 }
 
-extern "C" int
+int
-getgroups32 (int gidsetsize, gid_t *grouplist)
+internal_getgroups (int gidsetsize, gid_t *grouplist, cyg_ldap *pldap)
 {
   NTSTATUS status;
   HANDLE tok;
   ULONG size;
   int cnt = 0;
   struct group *grp;
-  cyg_ldap cldap;
 
   if (cygheap->user.groups.issetgroups ())
     {
       for (int pg = 0; pg < cygheap->user.groups.sgsids.count (); ++pg)
 	if ((grp = internal_getgrsid (cygheap->user.groups.sgsids.sids[pg],
-				      &cldap)))
+				      pldap)))
 	  {
 	    if (cnt < gidsetsize)
 	      grouplist[cnt] = grp->gr_gid;
@@ -500,7 +499,7 @@ getgroups32 (int gidsetsize, gid_t *grouplist)
 	  for (DWORD pg = 0; pg < groups->GroupCount; ++pg)
 	    {
 	      cygpsid sid = groups->Groups[pg].Sid;
-	      if ((grp = internal_getgrsid (sid, &cldap)))
+	      if ((grp = internal_getgrsid (sid, pldap)))
 		{
 		  if ((groups->Groups[pg].Attributes
 		      & (SE_GROUP_ENABLED | SE_GROUP_INTEGRITY_ENABLED))
@@ -525,6 +524,14 @@ error:
   return -1;
 }
 
+extern "C" int
+getgroups32 (int gidsetsize, gid_t *grouplist)
+{
+  cyg_ldap cldap;
+
+  return internal_getgroups (gidsetsize, grouplist, &cldap);
+}
+
 #ifdef __x86_64__
 EXPORT_ALIAS (getgroups32, getgroups)
 #else

winsup/cygwin/pwdgrp.h

@@ -27,6 +27,8 @@ extern struct group *internal_getgrsid_from_db (cygpsid &sid);
 extern struct group *internal_getgrgid (gid_t, cyg_ldap * = NULL);
 extern struct group *internal_getgrnam (const char *, cyg_ldap * = NULL);
 
+extern int internal_getgroups (int, gid_t *, cyg_ldap *);
+
 /* These functions are called from mkpasswd/mkgroup via cygwin_internal. */
 void *setpwent_filtered (int enums, PCWSTR enum_tdoms);
 void *getpwent_filtered (void *gr);

winsup/cygwin/uinfo.cc

@@ -116,30 +116,38 @@ cygheap_user::init ()
 void
 internal_getlogin (cygheap_user &user)
 {
-  struct passwd *pw = NULL;
+  struct passwd *pwd;
-  struct group *gr, *gr2;
+  struct group *pgrp, *grp, *grp2;
   cyg_ldap cldap;
 
-  cygpsid psid = user.sid ();
+  /* Fetch (and potentially generate) passwd and group entries for the user
-  pw = internal_getpwsid (psid, &cldap);
+     and the primary group in the token. */
-
+  pwd = internal_getpwsid (user.sid (), &cldap);
-  if (!pw && !(pw = internal_getpwnam (user.name (), &cldap)))
+  pgrp = internal_getgrsid (user.groups.pgsid, &cldap);
-    debug_printf ("user not found in /etc/passwd");
+  if (cygheap->pg.nss_db_full_caching ())
+    internal_getgroups (0, NULL, &cldap);
+  if (!pwd)
+    debug_printf ("user not found in passwd DB");
   else
     {
       cygsid gsid;
 
-      myself->uid = pw->pw_uid;
+      user.set_name (pwd->pw_name);
-      myself->gid = pw->pw_gid;
+      myself->uid = pwd->pw_uid;
-      user.set_name (pw->pw_name);
+      myself->gid = pwd->pw_gid;
-      if (gsid.getfromgr (gr = internal_getgrgid (pw->pw_gid, &cldap)))
+      /* Is the primary group in the passwd DB is different from the primary
+	 group in the user token, we have to find the SID of that group and
+	 try to override the token primary group. */
+      if (!pgrp || myself->gid != pgrp->gr_gid)
+	{
+	  if (gsid.getfromgr (grp = internal_getgrgid (pwd->pw_gid, &cldap)))
 	    {
 	      /* We might have a group file with a group entry for the current
-	     user's primary group, but the current user has no entry in passwd.
+		 user's primary group, but the current user has no entry in
-	     If so, pw_gid is taken from windows and might disagree with the
+		 passwd.  If so, pw_gid is taken from windows and might
-	     gr_gid from the group file.  Overwrite it brutally. */
+		 disagree with gr_gid from the group file.  Overwrite it. */
-	  if ((gr2 = internal_getgrsid (gsid, &cldap)) && gr2 != gr)
+	      if ((grp2 = internal_getgrsid (gsid, &cldap)) && grp2 != grp)
-	    myself->gid = pw->pw_gid = gr2->gr_gid;
+		myself->gid = pwd->pw_gid = grp2->gr_gid;
 	      /* Set primary group to the group in /etc/passwd. */
 	      if (gsid != user.groups.pgsid)
 		{
@@ -147,17 +155,24 @@ internal_getlogin (cygheap_user &user)
 							   TokenPrimaryGroup,
 							   &gsid, sizeof gsid);
 		  if (!NT_SUCCESS (status))
-		debug_printf ("NtSetInformationToken (TokenPrimaryGroup), %y",
+		    {
-			      status);
+		      debug_printf ("NtSetInformationToken (TokenPrimaryGroup),"
+				    " %y", status);
+		      /* Revert the primary group setting and override the
+			 setting in the passwd entry. */
+		      if (pgrp)
+			myself->gid = pwd->pw_gid = pgrp->gr_gid;
+		    }
 		  else
 		    user.groups.pgsid = gsid;
 		  clear_procimptoken ();
 		}
 	    }
 	  else
-	debug_printf ("gsid not found in augmented /etc/group");
+	    debug_printf ("group not found in group DB");
 	}
-  cygheap->user.ontherange (CH_HOME, pw);
+    }
+  cygheap->user.ontherange (CH_HOME, pwd);
 }
 
 void
@@ -569,7 +584,7 @@ cygheap_pwdgrp::init ()
   grp_src = (NSS_FILES | NSS_DB);
   prefix = NSS_AUTO;
   separator[0] = L'+';
-  caching = true;
+  caching = NSS_FULL_CACHING;
   enums = (ENUM_CACHE | ENUM_BUILTIN);
   enum_tdoms = NULL;
 }
@@ -659,10 +674,12 @@ cygheap_pwdgrp::nss_init_line (const char *line)
 	{
 	  c += 6;
 	  c += strspn (c, " \t");
-	  if (!strncmp (c, "yes", 3) && strchr (" \t", c[3]))
+	  if (!strncmp (c, "full", 3) && strchr (" \t", c[3]))
-	    caching = true;
+	    caching = NSS_FULL_CACHING;
+	  else if (!strncmp (c, "yes", 3) && strchr (" \t", c[3]))
+	    caching = NSS_CACHING;
 	  else if (!strncmp (c, "no", 2) && strchr (" \t", c[2]))
-	    caching = false;
+	    caching = NSS_NO_CACHING;
 	  else
 	    debug_printf ("Invalid nsswitch.conf content: %s", line);
 	}
@@ -986,6 +1003,8 @@ pwdgrp::add_account_from_windows (cygpsid &sid, bool group, cyg_ldap *pldap)
     return NULL;
   if (cygheap->pg.nss_db_caching ())
     return add_account_post_fetch (line, true);
+  if (group)
+    return (prep_tls_grbuf ())->add_account_post_fetch (line, false);
   return (prep_tls_pwbuf ())->add_account_post_fetch (line, false);
 }
 
@@ -1000,6 +1019,8 @@ pwdgrp::add_account_from_windows (const char *name, bool group, cyg_ldap *pldap)
     return NULL;
   if (cygheap->pg.nss_db_caching ())
     return add_account_post_fetch (line, true);
+  if (group)
+    return (prep_tls_grbuf ())->add_account_post_fetch (line, false);
   return (prep_tls_pwbuf ())->add_account_post_fetch (line, false);
 }
 
@@ -1014,6 +1035,8 @@ pwdgrp::add_account_from_windows (uint32_t id, bool group, cyg_ldap *pldap)
     return NULL;
   if (cygheap->pg.nss_db_caching ())
     return add_account_post_fetch (line, true);
+  if (group)
+    return (prep_tls_grbuf ())->add_account_post_fetch (line, false);
   return (prep_tls_pwbuf ())->add_account_post_fetch (line, false);
 }
 
@@ -1481,7 +1504,16 @@ pwdgrp::fetch_account_from_windows (fetch_user_arg_t &arg, bool group,
 	      if (acc_type != SidTypeUser)
 		break;
 
-	      gid = posix_offset + DOMAIN_GROUP_RID_USERS; /* Default. */
+	      /* Default primary group.  If the sid is the current user, fetch
+		 the default group from the current user token, otherwise make
+		 the educated guess that the user is in group "Domain Users"
+		 or "None". */
+	      if (sid == cygheap->user.sid ())
+		gid = posix_offset
+		      + sid_sub_auth_rid (cygheap->user.groups.pgsid);
+	      else
+		gid = posix_offset + DOMAIN_GROUP_RID_USERS;
+
 	      /* Use LDAP to fetch domain account infos. */
 	      if (!cldap->open (NULL))
 		break;
@@ -1724,6 +1756,12 @@ pwdgrp::fetch_account_from_windows (fetch_user_arg_t &arg, bool group,
 	  PDS_DOMAIN_TRUSTSW td = NULL;
 
 	  sid_sub_auth_count (sid) = sid_sub_auth_count (sid) - 1;
+	  if (RtlEqualSid (sid, cygheap->dom.primary_sid ()))
+	    {
+	      domain = cygheap->dom.primary_flat_name ();
+	      posix_offset = 0x100000;
+	    }
+	  else
 	    for (ULONG idx = 0; (td = cygheap->dom.trusted_domain (idx)); ++idx)
 	      if (td->DomainSid && RtlEqualSid (sid, td->DomainSid))
 		{