1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
5 /* Copyright (c) University of Cambridge 1995 - 2015 */
6 /* See the file NOTICE for conditions of use and distribution. */
9 #include "lf_functions.h"
11 #include <rpcsvc/nis.h>
14 /*************************************************
16 *************************************************/
18 /* See local README for interface description. */
21 nisplus_open(uschar *filename, uschar **errmsg)
23 return (void *)(1); /* Just return something non-null */
28 /*************************************************
30 *************************************************/
32 /* See local README for interface description. The format of queries for a
35 [field=value,...],table-name
37 [field=value,...],table-name:result-field-name
39 in other words, a normal NIS+ "indexed name", with an optional result field
40 name tagged on the end after a colon. If there is no result-field name, the
41 yield is the concatenation of all the fields, preceded by their names and an
45 nisplus_find(void *handle, uschar *filename, uschar *query, int length,
46 uschar **result, uschar **errmsg, uint *do_cache)
51 int error_error = FAIL;
52 uschar *field_name = NULL;
53 nis_result *nrt = NULL;
54 nis_result *nre = NULL;
55 nis_object *tno, *eno;
58 uschar *p = query + length;
61 do_cache = do_cache; /* Placate picky compilers */
63 /* Search backwards for a colon to see if a result field name
66 while (p > query && p[-1] != ':') p--;
73 else p = query + length;
75 /* Now search backwards to find the comma that starts the
78 while (p > query && p[-1] != ',') p--;
81 *errmsg = US"NIS+ query malformed";
86 /* Look up the data for the table, in order to get the field names,
87 check that we got back a table, and set up pointers so the field
88 names can be scanned. */
90 nrt = nis_lookup(CS p, EXPAND_NAME | NO_CACHE);
91 if (nrt->status != NIS_SUCCESS)
93 *errmsg = string_sprintf("NIS+ error accessing %s table: %s", p,
94 nis_sperrno(nrt->status));
95 if (nrt->status != NIS_NOTFOUND && nrt->status != NIS_NOSUCHTABLE)
99 tno = nrt->objects.objects_val;
100 if (tno->zo_data.zo_type != TABLE_OBJ)
102 *errmsg = string_sprintf("NIS+ error: %s is not a table", p);
105 ta = &(tno->zo_data.objdata_u.ta_data);
107 /* Now look up the entry in the table, check that we got precisely one
108 object and that it is a table entry. */
110 nre = nis_list(CS query, EXPAND_NAME, NULL, NULL);
111 if (nre->status != NIS_SUCCESS)
113 *errmsg = string_sprintf("NIS+ error accessing entry %s: %s",
114 query, nis_sperrno(nre->status));
117 if (nre->objects.objects_len > 1)
119 *errmsg = string_sprintf("NIS+ returned more than one object for %s",
123 else if (nre->objects.objects_len < 1)
125 *errmsg = string_sprintf("NIS+ returned no data for %s", query);
128 eno = nre->objects.objects_val;
129 if (eno->zo_data.zo_type != ENTRY_OBJ)
131 *errmsg = string_sprintf("NIS+ error: %s is not an entry", query);
135 /* Scan the columns in the entry and in the table. If a result field
136 was given, look for that field; otherwise concatenate all the fields
139 eo = &(eno->zo_data.objdata_u.en_data);
140 for (i = 0; i < eo->en_cols.en_cols_len; i++)
142 table_col *tc = ta->ta_cols.ta_cols_val + i;
143 entry_col *ec = eo->en_cols.en_cols_val + i;
144 int len = ec->ec_value.ec_value_len;
145 uschar *value = US ec->ec_value.ec_value_val;
147 /* The value may be NULL for a zero-length field. Turn this into an
148 empty string for consistency. Remove trailing whitespace and zero
151 if (value == NULL) value = US""; else
152 while (len > 0 && (value[len-1] == 0 || isspace(value[len-1])))
155 /* Concatenate all fields if no specific one selected */
157 if (field_name == NULL)
159 yield = string_cat(yield, &ssize, &offset,US tc->tc_name,
160 Ustrlen(tc->tc_name));
161 yield = string_cat(yield, &ssize, &offset, US"=", 1);
163 /* Quote the value if it contains spaces or is empty */
165 if (value[0] == 0 || Ustrchr(value, ' ') != NULL)
168 yield = string_cat(yield, &ssize, &offset, US"\"", 1);
169 for (j = 0; j < len; j++)
171 if (value[j] == '\"' || value[j] == '\\')
172 yield = string_cat(yield, &ssize, &offset, US"\\", 1);
173 yield = string_cat(yield, &ssize, &offset, value+j, 1);
175 yield = string_cat(yield, &ssize, &offset, US"\"", 1);
177 else yield = string_cat(yield, &ssize, &offset, value, len);
179 yield = string_cat(yield, &ssize, &offset, US" ", 1);
182 /* When the specified field is found, grab its data and finish */
184 else if (Ustrcmp(field_name, tc->tc_name) == 0)
186 yield = string_copyn(value, len);
191 /* Error if a field name was specified and we didn't find it; if no
192 field name, ensure the concatenated data is zero-terminated. */
194 if (field_name != NULL)
195 *errmsg = string_sprintf("NIS+ field %s not found for %s", field_name,
200 store_reset(yield + offset + 1);
203 /* Restore the colon in the query, and free result store before
207 if (field_name != NULL) field_name[-1] = ':';
208 if (nrt != NULL) nis_freeresult(nrt);
209 if (nre != NULL) nis_freeresult(nre);
217 return error_error; /* FAIL or DEFER */
222 /*************************************************
223 * Quote entry point *
224 *************************************************/
226 /* The only quoting that is necessary for NIS+ is to double any doublequote
227 characters. No options are recognized.
230 s the string to be quoted
231 opt additional option text or NULL if none
233 Returns: the processed string or NULL for a bad option
237 nisplus_quote(uschar *s, uschar *opt)
243 if (opt != NULL) return NULL; /* No options recognized */
245 while (*t != 0) if (*t++ == '\"') count++;
246 if (count == 0) return s;
248 t = quoted = store_get(Ustrlen(s) + count + 1);
253 if (*s++ == '\"') *t++ = '\"';
261 /*************************************************
262 * Version reporting entry point *
263 *************************************************/
265 /* See local README for interface description. */
267 #include "../version.h"
270 nisplus_version_report(FILE *f)
273 fprintf(f, "Library version: NIS+: Exim version %s\n", EXIM_VERSION_STR);
278 static lookup_info _lookup_info = {
279 US"nisplus", /* lookup name */
280 lookup_querystyle, /* query-style lookup */
281 nisplus_open, /* open function */
282 NULL, /* check function */
283 nisplus_find, /* find function */
284 NULL, /* no close function */
285 NULL, /* no tidy function */
286 nisplus_quote, /* quoting function */
287 nisplus_version_report /* version reporting */
291 #define nisplus_lookup_module_info _lookup_module_info
294 static lookup_info *_lookup_list[] = { &_lookup_info };
295 lookup_module_info nisplus_lookup_module_info = { LOOKUP_MODULE_INFO_MAGIC, _lookup_list, 1 };
297 /* End of lookups/nisplus.c */