* cygheap.cc (cygheap_user::set_name): Set homedrive and homepath to NULL on

user name change.
(cygheap_user::set_logsrv): Allocate enough space for leading \\ so that we can
put this in the environment, if needed.
* cygheap.h (homebodies): New enum.
(cygheap_user::homedrive): New field.
(cygheap_user::homepath): Ditto.
(cygheap_user::env_logsrv): New method.
(cygheap_user::env_homepath): New method.
(cygheap_user::env_homedrive): New method.
(cygheap_user::env_userprofile): New method.
(cygheap_user::ontherange): New method.
* environ.cc (envsize): Eliminate debugging argument.
(environ_init): Assume that envc counts number of elments not total size.
(spenv): New class.
(spenvs): New array, renamed from forced_winenv_vars, using spenv.
(spenv::retrieve): New method.
(build_env): Rename from 'winenv' -- one stop shopping for building new
environment blocks for both windows and "unix".
* environ.h (build_env: Declare.
(winenv): Delete declaration.
(envsize): Ditto.
* spawn.cc (spawn_guts): Use build_env to build windows and cygwin environment
blocks.
* uinfo.cc (internal_getlogin): Eliminate environment manipulation.  Default to
info from GetUserName if it exists.  Move HOMEPATH and HOMEDRIVE stuff
elsewhere.  Move HOME setting elsewhere.  Only set HOME environment variable in
processes that are not parented by a cygwin process.
(cygheap_user::ontherange): Define new method.
(cygheap_user::env_logsrv): Ditto.
(cygheap_user::env_homepath): Ditto.
(cygheap_user::env_homedrive): Ditto.
(cygheap_user::env_userprofile): Ditto.

winsup/cygwin/cygheap.h

@@ -85,6 +85,14 @@ public:
   const char *native_path () const { return m->native_path; }
 };
 
+enum homebodies
+{
+  CH_HOMEDRIVE,
+  CH_HOMEPATH,
+  CH_HOME
+};
+
+struct passwd;
 class cygheap_user
 {
   /* Extendend user information.
@@ -93,6 +101,8 @@ class cygheap_user
   char  *pname;         /* user's name */
   char  *plogsrv;       /* Logon server, may be FQDN */
   char  *pdomain;       /* Logon domain of the user */
+  char  *homedrive;	/* User's home drive */
+  char  *homepath;	/* User's home path */
   PSID   psid;          /* buffer for user's SID */
   PSID   orig_psid;     /* Remains intact even after impersonation */
 public:
@@ -116,6 +126,11 @@ public:
   void set_logsrv (const char *new_logsrv);
   const char *logsrv () const { return plogsrv; }
 
+  const char *env_logsrv ();
+  const char *env_homepath ();
+  const char *env_homedrive ();
+  const char *env_userprofile ();
+
   void set_domain (const char *new_domain);
   const char *domain () const { return pdomain; }
 
@@ -130,6 +145,7 @@ public:
     set_domain (user.domain ());
     set_sid (user.sid ());
   }
+  const char *ontherange (homebodies what, struct passwd * = NULL);
 };
 
 /* cwd cache stuff.  */