1973         *equals = '\0';
1974         v = mdb_nv_lookup(&pt->p_env, val);
1975 
1976         if (v != NULL) {
1977                 char *old = mdb_nv_get_cookie(v);
1978                 mdb_free(old, strlen(old) + 1);
1979                 name = mdb_nv_get_name(v);
1980         } else {
1981                 /*
1982                  * The environment is created using MDB_NV_EXTNAME, so we must
1983                  * provide external storage for the variable names.
1984                  */
1985                 name = strdup(val);
1986         }
1987 
1988         *equals = '=';
1989 
1990         (void) mdb_nv_insert(&pt->p_env, name, NULL, (uintptr_t)val,
1991             MDB_NV_EXTNAME);
1992 
1993         if (equals)
1994                 *equals = '=';
1995 }
1996 
1997 /*
1998  * Clears the internal environment.
1999  */
2000 static void
2001 pt_env_clear(pt_data_t *pt)
2002 {
2003         mdb_var_t *v;
2004         char *val, *name;
2005 
2006         mdb_nv_rewind(&pt->p_env);
2007         while ((v = mdb_nv_advance(&pt->p_env)) != NULL) {
2008 
2009                 name = (char *)mdb_nv_get_name(v);
2010                 val = mdb_nv_get_cookie(v);
2011 
2012                 mdb_nv_remove(&pt->p_env, v);
2013 

1973         *equals = '\0';
1974         v = mdb_nv_lookup(&pt->p_env, val);
1975 
1976         if (v != NULL) {
1977                 char *old = mdb_nv_get_cookie(v);
1978                 mdb_free(old, strlen(old) + 1);
1979                 name = mdb_nv_get_name(v);
1980         } else {
1981                 /*
1982                  * The environment is created using MDB_NV_EXTNAME, so we must
1983                  * provide external storage for the variable names.
1984                  */
1985                 name = strdup(val);
1986         }
1987 
1988         *equals = '=';
1989 
1990         (void) mdb_nv_insert(&pt->p_env, name, NULL, (uintptr_t)val,
1991             MDB_NV_EXTNAME);
1992 

1993         *equals = '=';
1994 }
1995 
1996 /*
1997  * Clears the internal environment.
1998  */
1999 static void
2000 pt_env_clear(pt_data_t *pt)
2001 {
2002         mdb_var_t *v;
2003         char *val, *name;
2004 
2005         mdb_nv_rewind(&pt->p_env);
2006         while ((v = mdb_nv_advance(&pt->p_env)) != NULL) {
2007 
2008                 name = (char *)mdb_nv_get_name(v);
2009                 val = mdb_nv_get_cookie(v);
2010 
2011                 mdb_nv_remove(&pt->p_env, v);
2012