source3/winbindd/idmap_hash/mapfile.c

   1 /*
   2  *  mapfile.c
   3  *
   4  *  Copyright (C) Gerald Carter  <jerry@samba.org>
   5  *
   6  *  This program is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation; either version 3 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, see <http://www.gnu.org/licenses/>.
  18  *
  19  */
  20
  21 #include "includes.h"
  22 #include "winbindd/winbindd.h"
  23 #include "idmap_hash.h"
  24 #include <stdio.h>
  25
  26 XFILE *lw_map_file = NULL;
  27
  28 /*********************************************************************
  29  ********************************************************************/
  30
  31 static bool mapfile_open(void)
  32 {
  33         const char *mapfile_name = NULL;
  34
  35         /* If we have an open handle, just reset it */
  36
  37         if (lw_map_file) {
  38                 return (x_tseek(lw_map_file, 0, SEEK_SET) == 0);
  39         }
  40
  41         mapfile_name = lp_parm_const_string(-1, "idmap_hash", "name_map", NULL);
  42         if (!mapfile_name) {
  43                 return false;
  44         }
  45
  46         lw_map_file = x_fopen(mapfile_name, O_RDONLY, 0);
  47         if (!lw_map_file) {
  48                 DEBUG(0,("can't open idmap_hash:name_map (%s). Error %s\n",
  49                          mapfile_name, strerror(errno) ));
  50                 return false;
  51         }
  52
  53         return true;
  54 }
  55
  56 /*********************************************************************
  57  ********************************************************************/
  58
  59 static bool mapfile_read_line(fstring key, fstring value)
  60 {
  61         char buffer[1024];
  62         char *p;
  63         int len;
  64
  65         if (!lw_map_file)
  66                 return false;
  67
  68         if ((p = x_fgets(buffer, sizeof(buffer)-1, lw_map_file)) == NULL) {
  69                 return false;
  70         }
  71
  72         /* Strip newlines and carriage returns */
  73
  74         len = strlen_m(buffer) - 1;
  75         while ((buffer[len] == '\n') || (buffer[len] == '\r')) {
  76                 buffer[len--] = '\0';
  77         }
  78
  79
  80         if ((p = strchr_m(buffer, '=')) == NULL ) {
  81                 DEBUG(0,("idmap_hash: Bad line in name_map (%s)\n", buffer));
  82                 return false;
  83         }
  84
  85         *p = '\0';
  86         p++;
  87
  88         fstrcpy(key, buffer);
  89         fstrcpy(value, p);
  90
  91         /* Eat whitespace */
  92
  93         if (!trim_char(key, ' ', ' '))
  94                 return false;
  95
  96         if (!trim_char(value, ' ', ' '))
  97                 return false;
  98
  99         return true;
 100 }
 101
 102 /*********************************************************************
 103  ********************************************************************/
 104
 105 static bool mapfile_close(void)
 106 {
 107         int ret = 0;
 108         if (lw_map_file) {
 109                 ret = x_fclose(lw_map_file);
 110                 lw_map_file = NULL;
 111         }
 112
 113         return (ret == 0);
 114 }
 115
 116
 117 /*********************************************************************
 118  ********************************************************************/
 119
 120 NTSTATUS mapfile_lookup_key(TALLOC_CTX *ctx, const char *value, char **key)
 121 {
 122         fstring r_key, r_value;
 123         NTSTATUS ret = NT_STATUS_NOT_FOUND;
 124
 125         if (!mapfile_open())
 126                 return NT_STATUS_OBJECT_PATH_NOT_FOUND;
 127
 128         while (mapfile_read_line(r_key, r_value))
 129         {
 130                 if (strequal(r_value, value)) {
 131                         ret = NT_STATUS_OK;
 132
 133                         /* We're done once finishing this block */
 134                         *key = talloc_strdup(ctx, r_key);
 135                         if (!*key) {
 136                                 ret = NT_STATUS_NO_MEMORY;
 137                         }
 138                         break;
 139                 }
 140         }
 141
 142         mapfile_close();
 143
 144         return ret;
 145 }
 146
 147 /*********************************************************************
 148  ********************************************************************/
 149
 150 NTSTATUS mapfile_lookup_value(TALLOC_CTX *ctx, const char *key, char **value)
 151 {
 152         fstring r_key, r_value;
 153         NTSTATUS ret = NT_STATUS_NOT_FOUND;
 154
 155         if (!mapfile_open())
 156                 return NT_STATUS_OBJECT_PATH_NOT_FOUND;
 157
 158         while (mapfile_read_line(r_key, r_value))
 159         {
 160                 if (strequal(r_key, key)) {
 161                         ret = NT_STATUS_OK;
 162
 163                         /* We're done once finishing this block */
 164                         *value = talloc_strdup(ctx, r_value);
 165                         if (!*key) {
 166                                 ret = NT_STATUS_NO_MEMORY;
 167                         }
 168                         break;
 169                 }
 170         }
 171
 172         mapfile_close();
 173
 174         return ret;
 175 }