libatalk/cnid/cnid_resolve.c

   1 /*
   2  * $Id: cnid_resolve.c,v 1.8 2001-10-21 08:33:33 jmarcus Exp $
   3  */
   4
   5 #ifdef HAVE_CONFIG_H
   6 #include "config.h"
   7 #endif /* HAVE_CONFIG_H */
   8
   9 #ifdef CNID_DB
  10 #include <stdio.h>
  11 #include <string.h>
  12 #include <sys/param.h>
  13 #include <sys/stat.h>
  14 #include <syslog.h>
  15 #include <errno.h>
  16
  17 #include <db.h>
  18 #include <netatalk/endian.h>
  19 #include <atalk/adouble.h>
  20 #include <atalk/cnid.h>
  21
  22 #include "cnid_private.h"
  23
  24 /* Return the did/name pair corresponding to a CNID. */
  25 char *cnid_resolve(void *CNID, cnid_t *id) {
  26         CNID_private *db;
  27         DBT key, data;
  28         int rc;
  29
  30         if (!(db = CNID) || !id || !(*id)) {
  31                 return NULL;
  32         }
  33
  34         memset(&key, 0, sizeof(key));
  35         memset(&data, 0, sizeof(data));
  36
  37         key.data = id;
  38         key.size = sizeof(cnid_t);
  39         while ((rc = db->db_cnid->get(db->db_cnid, NULL, &key, &data, 0))) {
  40                 if (rc == DB_LOCK_DEADLOCK) {
  41                         continue;
  42                 }
  43
  44                 if (rc != DB_NOTFOUND) {
  45                         syslog(LOG_ERR, "cnid_resolve: Unable to get did/name: %s",
  46                                db_strerror(rc));
  47                 }
  48
  49                 *id = 0;
  50                 return NULL;
  51         }
  52
  53         memcpy(id, (char *)data.data + CNID_DEVINO_LEN, sizeof(cnid_t));
  54 #ifdef DEBUG
  55         syslog(LOG_INFO, "cnid_resolve: Returning id = %u, did/name = %s",
  56                ntohl(*id), (char *)data.data + CNID_HEADER_LEN);
  57 #endif
  58         return (char *)data.data + CNID_HEADER_LEN;
  59 }
  60 #endif /* CNID_DB */