Line data    Source code

       1             : /*
       2             :     Authors:
       3             :         Simo Sorce <ssorce@redhat.com>
       4             : 
       5             :     Copyright (C) 2009 Red Hat
       6             : 
       7             :     This program is free software; you can redistribute it and/or modify
       8             :     it under the terms of the GNU General Public License as published by
       9             :     the Free Software Foundation; either version 3 of the License, or
      10             :     (at your option) any later version.
      11             : 
      12             :     This program is distributed in the hope that it will be useful,
      13             :     but WITHOUT ANY WARRANTY; without even the implied warranty of
      14             :     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      15             :     GNU General Public License for more details.
      16             : 
      17             :     You should have received a copy of the GNU General Public License
      18             :     along with this program.  If not, see <http://www.gnu.org/licenses/>.
      19             : */
      20             : 
      21             : #include <talloc.h>
      22             : 
      23             : #include "util/util.h"
      24             : 
      25             : /*
      26             :  * sssd_mem_attach
      27             :  * This function will take a non-talloc pointer and "attach" it to a talloc
      28             :  * memory context. It will accept a destructor for the original pointer
      29             :  * so that when the parent memory context is freed, the non-talloc
      30             :  * pointer will also be freed properly.
      31             :  */
      32             : 
      33           0 : int password_destructor(void *memctx)
      34             : {
      35           0 :     char *password = (char *)memctx;
      36             :     int i;
      37             : 
      38             :     /* zero out password */
      39           0 :     for (i = 0; password[i]; i++) password[i] = '\0';
      40             : 
      41           0 :     return 0;
      42             : }
      43             : 
      44           0 : static int mem_holder_destructor(void *ptr)
      45             : {
      46             :     struct mem_holder *h;
      47             : 
      48           0 :     h = talloc_get_type(ptr, struct mem_holder);
      49           0 :     return h->fn(h->mem);
      50             : }
      51             : 
      52           0 : void *sss_mem_attach(TALLOC_CTX *mem_ctx,
      53             :                      void *ptr,
      54             :                      void_destructor_fn_t *fn)
      55             : {
      56             :     struct mem_holder *h;
      57             : 
      58           0 :     if (!ptr || !fn) return NULL;
      59             : 
      60           0 :     h = talloc(mem_ctx, struct mem_holder);
      61           0 :     if (!h) return NULL;
      62             : 
      63           0 :     h->mem = ptr;
      64           0 :     h->fn = fn;
      65           0 :     talloc_set_destructor((TALLOC_CTX *)h, mem_holder_destructor);
      66             : 
      67           0 :     return h;
      68             : }