src/src/lookups/nis.c

   1 /*************************************************
   2 *     Exim - an Internet mail transport agent    *
   3 *************************************************/
   4
   5 /* Copyright (c) University of Cambridge 1995 - 2015 */
   6 /* Copyright (c) The Exim Maintainers 2020 */
   7 /* See the file NOTICE for conditions of use and distribution. */
   8
   9 #include "../exim.h"
  10 #include "lf_functions.h"
  11
  12 #include <rpcsvc/ypclnt.h>
  13
  14
  15 /*************************************************
  16 *              Open entry point                  *
  17 *************************************************/
  18
  19 /* See local README for interface description. This serves for both
  20 the "nis" and "nis0" lookup types. */
  21
  22 static void *
  23 nis_open(const uschar * filename, uschar ** errmsg)
  24 {
  25 char *nis_domain;
  26 if (yp_get_default_domain(&nis_domain) != 0)
  27   {
  28   *errmsg = US"failed to get default NIS domain";
  29   return NULL;
  30   }
  31 return nis_domain;
  32 }
  33
  34
  35
  36 /*************************************************
  37 *           Find entry point for nis             *
  38 *************************************************/
  39
  40 /* See local README for interface description. A separate function is used
  41 for nis0 because they are so short it isn't worth trying to use any common
  42 code. */
  43
  44 static int
  45 nis_find(void * handle, const uschar * filename, const uschar * keystring,
  46   int length, uschar ** result, uschar ** errmsg, uint * do_cache,
  47   const uschar * opts)
  48 {
  49 int rc;
  50 uschar *nis_data;
  51 int nis_data_length;
  52 do_cache = do_cache;   /* Placate picky compilers */
  53 if ((rc = yp_match(CCS handle, CCS filename, CCS keystring, length,
  54     CSS &nis_data, &nis_data_length)) == 0)
  55   {
  56   *result = string_copy(nis_data);
  57   (*result)[nis_data_length] = 0;    /* remove final '\n' */
  58   return OK;
  59   }
  60 return (rc == YPERR_KEY || rc == YPERR_MAP)? FAIL : DEFER;
  61 }
  62
  63
  64
  65 /*************************************************
  66 *           Find entry point for nis0            *
  67 *************************************************/
  68
  69 /* See local README for interface description. */
  70
  71 static int
  72 nis0_find(void * handle, const uschar * filename, const uschar * keystring,
  73   int length, uschar ** result, uschar ** errmsg, uint * do_cache,
  74   const uschar * opts)
  75 {
  76 int rc;
  77 uschar *nis_data;
  78 int nis_data_length;
  79 do_cache = do_cache;   /* Placate picky compilers */
  80 if ((rc = yp_match(CCS handle, CCS filename, CCS keystring, length + 1,
  81     CSS &nis_data, &nis_data_length)) == 0)
  82   {
  83   *result = string_copy(nis_data);
  84   (*result)[nis_data_length] = 0;    /* remove final '\n' */
  85   return OK;
  86   }
  87 return (rc == YPERR_KEY || rc == YPERR_MAP)? FAIL : DEFER;
  88 }
  89
  90
  91
  92 /*************************************************
  93 *         Version reporting entry point          *
  94 *************************************************/
  95
  96 /* See local README for interface description. */
  97
  98 #include "../version.h"
  99
 100 void
 101 nis_version_report(FILE *f)
 102 {
 103 #ifdef DYNLOOKUP
 104 fprintf(f, "Library version: NIS: Exim version %s\n", EXIM_VERSION_STR);
 105 #endif
 106 }
 107
 108
 109 static lookup_info nis_lookup_info = {
 110   .name = US"nis",                      /* lookup name */
 111   .type = 0,                            /* not abs file, not query style*/
 112   .open = nis_open,                     /* open function */
 113   .check = NULL,                        /* check function */
 114   .find = nis_find,                     /* find function */
 115   .close = NULL,                        /* no close function */
 116   .tidy = NULL,                         /* no tidy function */
 117   .quote = NULL,                        /* no quoting function */
 118   .version_report = nis_version_report             /* version reporting */
 119 };
 120
 121 static lookup_info nis0_lookup_info = {
 122   .name = US"nis0",                     /* lookup name */
 123   .type = 0,                            /* not absfile, not query style */
 124   .open = nis_open,                     /* sic */         /* open function */
 125   .check = NULL,                        /* check function */
 126   .find = nis0_find,                    /* find function */
 127   .close = NULL,                        /* no close function */
 128   .tidy = NULL,                         /* no tidy function */
 129   .quote = NULL,                        /* no quoting function */
 130   .version_report = NULL                           /* no version reporting (redundant) */
 131 };
 132
 133 #ifdef DYNLOOKUP
 134 #define nis_lookup_module_info _lookup_module_info
 135 #endif
 136
 137 static lookup_info *_lookup_list[] = { &nis_lookup_info, &nis0_lookup_info };
 138 lookup_module_info nis_lookup_module_info = { LOOKUP_MODULE_INFO_MAGIC, _lookup_list, 2 };
 139
 140 /* End of lookups/nis.c */