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 "system/filesys.h"
  23 #include "winbindd/winbindd.h"
  24 #include "idmap.h"
  25 #include "idmap_hash.h"
  26 #include <stdio.h>
  27
  28 XFILE *lw_map_file = NULL;
  29
  30 /*********************************************************************
  31  ********************************************************************/
  32
  33 static bool mapfile_open(void)
  34 {
  35         const char *mapfile_name = NULL;
  36
  37         /* If we have an open handle, just reset it */
  38
  39         if (lw_map_file) {
  40                 return (x_tseek(lw_map_file, 0, SEEK_SET) == 0);
  41         }
  42
  43         mapfile_name = lp_parm_const_string(-1, "idmap_hash", "name_map", NULL);
  44         if (!mapfile_name) {
  45                 return false;
  46         }
  47
  48         lw_map_file = x_fopen(mapfile_name, O_RDONLY, 0);
  49         if (!lw_map_file) {
  50                 DEBUG(0,("can't open idmap_hash:name_map (%s). Error %s\n",
  51                          mapfile_name, strerror(errno) ));
  52                 return false;
  53         }
  54
  55         return true;
  56 }
  57
  58 /*********************************************************************
  59  ********************************************************************/
  60
  61 static bool mapfile_read_line(fstring key, fstring value)
  62 {
  63         char buffer[1024];
  64         char *p;
  65         int len;
  66
  67         if (!lw_map_file)
  68                 return false;
  69
  70         if ((p = x_fgets(buffer, sizeof(buffer)-1, lw_map_file)) == NULL) {
  71                 return false;
  72         }
  73
  74         /* Strip newlines and carriage returns */
  75
  76         len = strlen_m(buffer) - 1;
  77         while ((buffer[len] == '\n') || (buffer[len] == '\r')) {
  78                 buffer[len--] = '\0';
  79         }
  80
  81
  82         if ((p = strchr_m(buffer, '=')) == NULL ) {
  83                 DEBUG(0,("idmap_hash: Bad line in name_map (%s)\n", buffer));
  84                 return false;
  85         }
  86
  87         *p = '\0';
  88         p++;
  89
  90         strlcpy(key, buffer, sizeof(fstring));
  91         strlcpy(value, p, sizeof(fstring));
  92
  93         /* Eat whitespace */
  94
  95         if (!trim_char(key, ' ', ' '))
  96                 return false;
  97
  98         if (!trim_char(value, ' ', ' '))
  99                 return false;
 100
 101         return true;
 102 }
 103
 104 /*********************************************************************
 105  ********************************************************************/
 106
 107 static bool mapfile_close(void)
 108 {
 109         int ret = 0;
 110         if (lw_map_file) {
 111                 ret = x_fclose(lw_map_file);
 112                 lw_map_file = NULL;
 113         }
 114
 115         return (ret == 0);
 116 }
 117
 118
 119 /*********************************************************************
 120  ********************************************************************/
 121
 122 NTSTATUS mapfile_lookup_key(TALLOC_CTX *ctx, const char *value, char **key)
 123 {
 124         fstring r_key, r_value;
 125         NTSTATUS ret = NT_STATUS_NOT_FOUND;
 126
 127         if (!mapfile_open())
 128                 return NT_STATUS_OBJECT_PATH_NOT_FOUND;
 129
 130         while (mapfile_read_line(r_key, r_value))
 131         {
 132                 if (strequal(r_value, value)) {
 133                         ret = NT_STATUS_OK;
 134
 135                         /* We're done once finishing this block */
 136                         *key = talloc_strdup(ctx, r_key);
 137                         if (!*key) {
 138                                 ret = NT_STATUS_NO_MEMORY;
 139                         }
 140                         break;
 141                 }
 142         }
 143
 144         mapfile_close();
 145
 146         return ret;
 147 }
 148
 149 /*********************************************************************
 150  ********************************************************************/
 151
 152 NTSTATUS mapfile_lookup_value(TALLOC_CTX *ctx, const char *key, char **value)
 153 {
 154         fstring r_key, r_value;
 155         NTSTATUS ret = NT_STATUS_NOT_FOUND;
 156
 157         if (!mapfile_open())
 158                 return NT_STATUS_OBJECT_PATH_NOT_FOUND;
 159
 160         while (mapfile_read_line(r_key, r_value))
 161         {
 162                 if (strequal(r_key, key)) {
 163                         ret = NT_STATUS_OK;
 164
 165                         /* We're done once finishing this block */
 166                         *value = talloc_strdup(ctx, r_value);
 167                         if (!*key) {
 168                                 ret = NT_STATUS_NO_MEMORY;
 169                         }
 170                         break;
 171                 }
 172         }
 173
 174         mapfile_close();
 175
 176         return ret;
 177 }