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         p = x_fgets(buffer, sizeof(buffer)-1, lw_map_file);
  71         if (p == NULL) {
  72                 return false;
  73         }
  74
  75         /* Strip newlines and carriage returns */
  76
  77         len = strlen_m(buffer);
  78         if (len == 0) {
  79                 return false;
  80         }
  81         len -= 1;
  82
  83         while ((buffer[len] == '\n') || (buffer[len] == '\r')) {
  84                 buffer[len--] = '\0';
  85         }
  86
  87
  88         if ((p = strchr_m(buffer, '=')) == NULL ) {
  89                 DEBUG(0,("idmap_hash: Bad line in name_map (%s)\n", buffer));
  90                 return false;
  91         }
  92
  93         *p = '\0';
  94         p++;
  95
  96         strlcpy(key, buffer, sizeof(fstring));
  97         strlcpy(value, p, sizeof(fstring));
  98
  99         /* Eat whitespace */
 100
 101         if (!trim_char(key, ' ', ' '))
 102                 return false;
 103
 104         if (!trim_char(value, ' ', ' '))
 105                 return false;
 106
 107         return true;
 108 }
 109
 110 /*********************************************************************
 111  ********************************************************************/
 112
 113 static bool mapfile_close(void)
 114 {
 115         int ret = 0;
 116         if (lw_map_file) {
 117                 ret = x_fclose(lw_map_file);
 118                 lw_map_file = NULL;
 119         }
 120
 121         return (ret == 0);
 122 }
 123
 124
 125 /*********************************************************************
 126  ********************************************************************/
 127
 128 NTSTATUS mapfile_lookup_key(TALLOC_CTX *ctx, const char *value, char **key)
 129 {
 130         fstring r_key, r_value;
 131         NTSTATUS ret = NT_STATUS_NOT_FOUND;
 132
 133         if (!mapfile_open())
 134                 return NT_STATUS_OBJECT_PATH_NOT_FOUND;
 135
 136         while (mapfile_read_line(r_key, r_value))
 137         {
 138                 if (strequal(r_value, value)) {
 139                         ret = NT_STATUS_OK;
 140
 141                         /* We're done once finishing this block */
 142                         *key = talloc_strdup(ctx, r_key);
 143                         if (!*key) {
 144                                 ret = NT_STATUS_NO_MEMORY;
 145                         }
 146                         break;
 147                 }
 148         }
 149
 150         mapfile_close();
 151
 152         return ret;
 153 }
 154
 155 /*********************************************************************
 156  ********************************************************************/
 157
 158 NTSTATUS mapfile_lookup_value(TALLOC_CTX *ctx, const char *key, char **value)
 159 {
 160         fstring r_key, r_value;
 161         NTSTATUS ret = NT_STATUS_NOT_FOUND;
 162
 163         if (!mapfile_open())
 164                 return NT_STATUS_OBJECT_PATH_NOT_FOUND;
 165
 166         while (mapfile_read_line(r_key, r_value))
 167         {
 168                 if (strequal(r_key, key)) {
 169                         ret = NT_STATUS_OK;
 170
 171                         /* We're done once finishing this block */
 172                         *value = talloc_strdup(ctx, r_value);
 173                         if (!*key) {
 174                                 ret = NT_STATUS_NO_MEMORY;
 175                         }
 176                         break;
 177                 }
 178         }
 179
 180         mapfile_close();
 181
 182         return ret;
 183 }