* cygheap.cc (cfree_and_set): New function.

(cygheap_user::set_name): Use cfree_and_set to reset members.
* cygheap.h (cygheap_user): Delete static members.
(cygheap_user::puserprof): New member.
(cfree_and_set): Declare.
* dcrt0.cc (almost_null): Define.
* winsup.h (almost_null): Declare.
* syscalls.cc (cfree_and_set): Remove unused variable.
* uinfo.cc (cygheap_user::homepath_env_buf): Eliminate.
(cygheap_user::homedrive_env_buf): Ditto.
(cygheap_user::userprofile_env_buf): Ditto.
(cygheap_user::ontherange): YA change to try to preserve existing HOMEPATH and
HOMEDRIVE.  Return almost_null values when variables should not actually exist.
(cygheap_user::env_logsrv): Ditto.
(cygheap_user::env_domain): Ditto.
(cygheap_user::env_userprofile): Ditto.

winsup/cygwin/ChangeLog

@@ -1,3 +1,23 @@
+2002-06-27  Christopher Faylor  <cgf@redhat.com>
+
+	* cygheap.cc (cfree_and_set): New function.
+	(cygheap_user::set_name): Use cfree_and_set to reset members.
+	* cygheap.h (cygheap_user): Delete static members.
+	(cygheap_user::puserprof): New member.
+	(cfree_and_set): Declare.
+	* dcrt0.cc (almost_null): Define.
+	* winsup.h (almost_null): Declare.
+	* syscalls.cc (cfree_and_set): Remove unused variable.
+	* uinfo.cc (cygheap_user::homepath_env_buf): Eliminate.
+	(cygheap_user::homedrive_env_buf): Ditto.
+	(cygheap_user::userprofile_env_buf): Ditto.
+	(cygheap_user::ontherange): YA change to try to preserve existing
+	HOMEPATH and HOMEDRIVE.  Return almost_null values when variables
+	should not actually exist.
+	(cygheap_user::env_logsrv): Ditto.
+	(cygheap_user::env_domain): Ditto.
+	(cygheap_user::env_userprofile): Ditto.
+
 2002-06-27  Corinna Vinschen  <corinna@vinschen.de>
 
 	* dcrt0.cc (dll_crt0_1): Let __progname point to the applications

winsup/cygwin/cygheap.cc

@@ -327,6 +327,14 @@ cfree (void *s)
   MALLOC_CHECK;
 }
 
+extern "C" void __stdcall
+cfree_and_set (char *&s, char *what)
+{
+  if (s && s != almost_null)
+    cfree (s);
+  s = what;
+}
+
 extern "C" void *__stdcall
 ccalloc (cygheap_types x, DWORD n, DWORD size)
 {
@@ -453,15 +461,11 @@ cygheap_user::set_name (const char *new_name)
   if (!allocated)
     return;		/* Initializing.  Don't bother with other stuff. */
 
-  homedrive = NULL;
+  cfree_and_set (homedrive);
-  homepath = NULL;
+  cfree_and_set (homepath);
-  if (plogsrv)
+  cfree_and_set (plogsrv);
-    cfree (plogsrv);
+  cfree_and_set (pdomain);
-  if (pdomain)
+  cfree_and_set (winname);
-    cfree (pdomain);
-  if (winname)
-    cfree (winname);
-  plogsrv = pdomain = winname = NULL;
 }
 
 BOOL

winsup/cygwin/cygheap.h

@@ -104,15 +104,9 @@ class cygheap_user
   char  *homedrive;	/* User's home drive */
   char  *homepath;	/* User's home path */
   char  *winname;	/* User's name as far as Windows knows it */
+  char  *puserprof;	/* User profile */
   PSID   psid;          /* buffer for user's SID */
   PSID   orig_psid;     /* Remains intact even after impersonation */
-  static char homedrive_env_buf[3]; /* Where the HOMEDRIVE environment variable
-				       info may live. */
-  static char homepath_env_buf[MAX_PATH + 1]; /* Where the HOMEPATH environment
-						 variable info may live. */
-  static char userprofile_env_buf[MAX_PATH + 1]; /* Where the USERPROFILE
-						    environment variable info
-						    may live. */
 public:
   __uid32_t orig_uid;      /* Remains intact even after impersonation */
   __gid32_t orig_gid;      /* Ditto */
@@ -124,9 +118,17 @@ public:
   HANDLE token;
   BOOL   impersonated;
 
+  /* CGF 2002-06-27.  I removed the initializaton from this constructor
+     since this class is always allocated statically.  That means that everything
+     is zero anyway so there is no need to initialize it to zero.  Since the
+     token initialization is always handled during process startup as well,
+     I've removed the constructor entirely.  Please reinstate this f this
+     situation ever changes.
   cygheap_user () : pname (NULL), plogsrv (NULL), pdomain (NULL),
-		    homedrive (NULL), homepath (NULL),
+		    homedrive (NULL), homepath (NULL), psid (NULL),
-		    psid (NULL), token (INVALID_HANDLE_VALUE) {}
+		    token (INVALID_HANDLE_VALUE) {}
+  */
+
   ~cygheap_user ();
 
   void set_name (const char *new_name);
@@ -289,5 +291,6 @@ void *__stdcall crealloc (void *, DWORD) __attribute__ ((regparm(2)));
 void *__stdcall ccalloc (cygheap_types, DWORD, DWORD) __attribute__ ((regparm(3)));
 char *__stdcall cstrdup (const char *) __attribute__ ((regparm(1)));
 char *__stdcall cstrdup1 (const char *) __attribute__ ((regparm(1)));
+void __stdcall cfree_and_set (char *&, char * = NULL) __attribute__ ((regparm(2)));
 void __stdcall cygheap_init ();
 }

winsup/cygwin/dcrt0.cc

@@ -75,6 +75,8 @@ MTinterface _mtinterf;
 bool NO_COPY _cygwin_testing;
 unsigned NO_COPY _cygwin_testing_magic;
 
+char NO_COPY almost_null[1];
+
 extern "C"
 {
   void *export_malloc (unsigned int);

winsup/cygwin/environ.cc

@@ -759,7 +759,7 @@ struct spenv
     __attribute__ ((regparm (3)));
 };
 
-char env_dontadd[] = "";
+#define env_dontadd almost_null
 
 /* Keep this list in upper case and sorted */
 static NO_COPY spenv spenvs[] =

winsup/cygwin/syscalls.cc

@@ -1969,7 +1969,6 @@ seteuid32 (__uid32_t uid)
   BOOL sav_impersonated, sav_token_is_internal_token;
   BOOL process_ok, explicitly_created_token = FALSE;
   struct passwd * pw_new;
-  cygheap_user user;
   PSID origpsid, psid2 = NO_SID;
 
   debug_printf ("uid: %d myself->gid: %d", uid, myself->gid);

winsup/cygwin/uinfo.cc

@@ -187,31 +187,26 @@ cuserid (char *src)
   return src;
 }
 
-char cygheap_user::homepath_env_buf[MAX_PATH + 1];
-char cygheap_user::homedrive_env_buf[3];
-char cygheap_user::userprofile_env_buf[MAX_PATH + 1];
-
 const char *
 cygheap_user::ontherange (homebodies what, struct passwd *pw)
 {
   LPUSER_INFO_3 ui = NULL;
   WCHAR wuser[UNLEN + 1];
   NET_API_STATUS ret;
+  char homepath_env_buf[MAX_PATH + 1];
+  char homedrive_env_buf[3];
+  char *newhomedrive = NULL;
+  char *newhomepath = NULL;
+
 
   if (what == CH_HOME)
     {
       char *p;
       if ((p = getenv ("HOMEDRIVE")))
-	{
+	newhomedrive = p;
-	  memcpy (homedrive_env_buf, p, 2);
-	  homedrive = homedrive_env_buf;
-	}
 
       if ((p = getenv ("HOMEPATH")))
-	{
+	newhomepath = p;
-	  strcpy (homepath_env_buf, p);
-	  homepath = homepath_env_buf;
-	}
 
       if ((p = getenv ("HOME")))
 	debug_printf ("HOME is already in the environment %s", p);
@@ -224,21 +219,20 @@ cygheap_user::ontherange (homebodies what, struct passwd *pw)
 	      setenv ("HOME", pw->pw_dir, 1);
 	      debug_printf ("Set HOME (from /etc/passwd) to %s", pw->pw_dir);
 	    }
-	  else if (homedrive && homepath)
+	  else if (newhomedrive && newhomepath)
 	    {
 	      char home[MAX_PATH];
 	      char buf[MAX_PATH + 1];
-	      strcpy (buf, homedrive);
+	      strcpy (buf, newhomedrive);
-	      strcat (buf, homepath);
+	      strcat (buf, newhomepath);
 	      cygwin_conv_to_full_posix_path (buf, home);
 	      setenv ("HOME", home, 1);
 	      debug_printf ("Set HOME (from HOMEDRIVE/HOMEPATH) to %s", home);
 	    }
 	}
-      return NULL;
     }
 
-  if (homedrive == NULL || !homedrive[0])
+  if (homepath == NULL && newhomepath == NULL)
     {
       if (!pw)
 	pw = getpwnam (name ());
@@ -246,6 +240,7 @@ cygheap_user::ontherange (homebodies what, struct passwd *pw)
 	cygwin_conv_to_full_win32_path (pw->pw_dir, homepath_env_buf);
       else
 	{
+	  homepath_env_buf[0] = homepath_env_buf[1] = '\0';
 	  if (env_logsrv ())
 	    {
 	      WCHAR wlogsrv[INTERNET_MAX_HOST_NAME_LENGTH + 3];
@@ -275,18 +270,26 @@ cygheap_user::ontherange (homebodies what, struct passwd *pw)
 
       if (homepath_env_buf[1] != ':')
 	{
-	  homedrive_env_buf[0] = homedrive_env_buf[1] = '\0';
+	  newhomedrive = almost_null;
-	  homepath = homepath_env_buf;
+	  newhomepath = homepath_env_buf;
 	}
       else
 	{
 	  homedrive_env_buf[0] = homepath_env_buf[0];
 	  homedrive_env_buf[1] = homepath_env_buf[1];
-	  homepath = homepath_env_buf + 2;
+	  homedrive_env_buf[2] = '\0';
+	  newhomedrive = homedrive_env_buf;
+	  newhomepath = homepath_env_buf + 2;
 	}
-      homedrive = homedrive_env_buf;
     }
 
+  if (newhomedrive)
+    cfree_and_set (homedrive, (newhomedrive == almost_null)
+		   	      ? almost_null : cstrdup (newhomedrive));
+
+  if (newhomepath)
+    cfree_and_set (homepath, cstrdup (newhomepath));
+
   switch (what)
     {
     case CH_HOMEDRIVE:
@@ -308,9 +311,10 @@ cygheap_user::env_logsrv ()
     return NULL;
 
   char logsrv[INTERNET_MAX_HOST_NAME_LENGTH + 3];
-  if (!get_logon_server (env_domain (), logsrv, NULL))
+  cfree_and_set (plogsrv, almost_null);
-    return NULL;
+  if (get_logon_server (env_domain (), logsrv, NULL))
-  return plogsrv = cstrdup (logsrv);
+    plogsrv = cstrdup (logsrv);
+  return plogsrv;
 }
 
 const char *
@@ -325,27 +329,30 @@ cygheap_user::env_domain ()
   DWORD dlen = sizeof (userdomain);
   SID_NAME_USE use;
 
+  cfree_and_set (winname, almost_null);
+  cfree_and_set (pdomain, almost_null);
   if (!LookupAccountSid (NULL, sid (), username, &ulen,
 			 userdomain, &dlen, &use))
-    {
     __seterrno ();
-      return NULL;
+  else
-    }
+    {
-  if (winname)
-    cfree (winname);
       winname = cstrdup (username);
-  return pdomain = cstrdup (userdomain);
+      pdomain = cstrdup (userdomain);
+    }
+  return pdomain;
 }
 
 const char *
 cygheap_user::env_userprofile ()
 {
+  char userprofile_env_buf[MAX_PATH + 1];
+  cfree_and_set (puserprof, almost_null);
   /* FIXME: Should this just be setting a puserprofile like everything else? */
   if (!strcasematch (env_name (), "SYSTEM")
       && get_registry_hive_path (sid (), userprofile_env_buf))
-    return userprofile_env_buf;
+    puserprof = cstrdup (userprofile_env_buf);
 
-  return NULL;
+  return puserprof;
 }
 
 const char *

winsup/cygwin/winsup.h

@@ -288,6 +288,8 @@ extern bool cygwin_testing;
 extern unsigned _cygwin_testing_magic;
 extern HMODULE cygwin_hmodule;
 
+extern char almost_null[];
+
 #define winsock2_active (wsadata.wVersion >= 512)
 #define winsock_active (wsadata.wVersion < 512)
 extern struct WSAData wsadata;