src/lookups/nis.c

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