1 /* $Cambridge: exim/src/src/lookups/nisplus.c,v 1.5 2009/11/16 19:50:38 nm4 Exp $ */
3 /*************************************************
4 * Exim - an Internet mail transport agent *
5 *************************************************/
7 /* Copyright (c) University of Cambridge 1995 - 2009 */
8 /* See the file NOTICE for conditions of use and distribution. */
11 #include "lf_functions.h"
13 #include <rpcsvc/nis.h>
16 /*************************************************
18 *************************************************/
20 /* See local README for interface description. */
23 nisplus_open(uschar *filename, uschar **errmsg)
25 return (void *)(1); /* Just return something non-null */
30 /*************************************************
32 *************************************************/
34 /* See local README for interface description. The format of queries for a
37 [field=value,...],table-name
39 [field=value,...],table-name:result-field-name
41 in other words, a normal NIS+ "indexed name", with an optional result field
42 name tagged on the end after a colon. If there is no result-field name, the
43 yield is the concatenation of all the fields, preceded by their names and an
47 nisplus_find(void *handle, uschar *filename, uschar *query, int length,
48 uschar **result, uschar **errmsg, BOOL *do_cache)
53 int error_error = FAIL;
54 uschar *field_name = NULL;
55 nis_result *nrt = NULL;
56 nis_result *nre = NULL;
57 nis_object *tno, *eno;
60 uschar *p = query + length;
63 do_cache = do_cache; /* Placate picky compilers */
65 /* Search backwards for a colon to see if a result field name
68 while (p > query && p[-1] != ':') p--;
75 else p = query + length;
77 /* Now search backwards to find the comma that starts the
80 while (p > query && p[-1] != ',') p--;
83 *errmsg = US"NIS+ query malformed";
88 /* Look up the data for the table, in order to get the field names,
89 check that we got back a table, and set up pointers so the field
90 names can be scanned. */
92 nrt = nis_lookup(CS p, EXPAND_NAME | NO_CACHE);
93 if (nrt->status != NIS_SUCCESS)
95 *errmsg = string_sprintf("NIS+ error accessing %s table: %s", p,
96 nis_sperrno(nrt->status));
97 if (nrt->status != NIS_NOTFOUND && nrt->status != NIS_NOSUCHTABLE)
101 tno = nrt->objects.objects_val;
102 if (tno->zo_data.zo_type != TABLE_OBJ)
104 *errmsg = string_sprintf("NIS+ error: %s is not a table", p);
107 ta = &(tno->zo_data.objdata_u.ta_data);
109 /* Now look up the entry in the table, check that we got precisely one
110 object and that it is a table entry. */
112 nre = nis_list(CS query, EXPAND_NAME, NULL, NULL);
113 if (nre->status != NIS_SUCCESS)
115 *errmsg = string_sprintf("NIS+ error accessing entry %s: %s",
116 query, nis_sperrno(nre->status));
119 if (nre->objects.objects_len > 1)
121 *errmsg = string_sprintf("NIS+ returned more than one object for %s",
125 else if (nre->objects.objects_len < 1)
127 *errmsg = string_sprintf("NIS+ returned no data for %s", query);
130 eno = nre->objects.objects_val;
131 if (eno->zo_data.zo_type != ENTRY_OBJ)
133 *errmsg = string_sprintf("NIS+ error: %s is not an entry", query);
137 /* Scan the columns in the entry and in the table. If a result field
138 was given, look for that field; otherwise concatenate all the fields
141 eo = &(eno->zo_data.objdata_u.en_data);
142 for (i = 0; i < eo->en_cols.en_cols_len; i++)
144 table_col *tc = ta->ta_cols.ta_cols_val + i;
145 entry_col *ec = eo->en_cols.en_cols_val + i;
146 int len = ec->ec_value.ec_value_len;
147 uschar *value = US ec->ec_value.ec_value_val;
149 /* The value may be NULL for a zero-length field. Turn this into an
150 empty string for consistency. Remove trailing whitespace and zero
153 if (value == NULL) value = US""; else
154 while (len > 0 && (value[len-1] == 0 || isspace(value[len-1])))
157 /* Concatenate all fields if no specific one selected */
159 if (field_name == NULL)
161 yield = string_cat(yield, &ssize, &offset,US tc->tc_name,
162 Ustrlen(tc->tc_name));
163 yield = string_cat(yield, &ssize, &offset, US"=", 1);
165 /* Quote the value if it contains spaces or is empty */
167 if (value[0] == 0 || Ustrchr(value, ' ') != NULL)
170 yield = string_cat(yield, &ssize, &offset, US"\"", 1);
171 for (j = 0; j < len; j++)
173 if (value[j] == '\"' || value[j] == '\\')
174 yield = string_cat(yield, &ssize, &offset, US"\\", 1);
175 yield = string_cat(yield, &ssize, &offset, value+j, 1);
177 yield = string_cat(yield, &ssize, &offset, US"\"", 1);
179 else yield = string_cat(yield, &ssize, &offset, value, len);
181 yield = string_cat(yield, &ssize, &offset, US" ", 1);
184 /* When the specified field is found, grab its data and finish */
186 else if (Ustrcmp(field_name, tc->tc_name) == 0)
188 yield = string_copyn(value, len);
193 /* Error if a field name was specified and we didn't find it; if no
194 field name, ensure the concatenated data is zero-terminated. */
196 if (field_name != NULL)
197 *errmsg = string_sprintf("NIS+ field %s not found for %s", field_name,
202 store_reset(yield + offset + 1);
205 /* Restore the colon in the query, and free result store before
209 if (field_name != NULL) field_name[-1] = ':';
210 if (nrt != NULL) nis_freeresult(nrt);
211 if (nre != NULL) nis_freeresult(nre);
219 return error_error; /* FAIL or DEFER */
224 /*************************************************
225 * Quote entry point *
226 *************************************************/
228 /* The only quoting that is necessary for NIS+ is to double any doublequote
229 characters. No options are recognized.
232 s the string to be quoted
233 opt additional option text or NULL if none
235 Returns: the processed string or NULL for a bad option
239 nisplus_quote(uschar *s, uschar *opt)
245 if (opt != NULL) return NULL; /* No options recognized */
247 while (*t != 0) if (*t++ == '\"') count++;
248 if (count == 0) return s;
250 t = quoted = store_get(Ustrlen(s) + count + 1);
255 if (*s++ == '\"') *t++ = '\"';
263 /*************************************************
264 * Version reporting entry point *
265 *************************************************/
267 /* See local README for interface description. */
269 #include "../version.h"
272 nisplus_version_report(FILE *f)
275 fprintf(f, "Library version: NIS+: Exim version %s\n", EXIM_VERSION_STR);
280 static lookup_info _lookup_info = {
281 US"nisplus", /* lookup name */
282 lookup_querystyle, /* query-style lookup */
283 nisplus_open, /* open function */
284 NULL, /* check function */
285 nisplus_find, /* find function */
286 NULL, /* no close function */
287 NULL, /* no tidy function */
288 nisplus_quote, /* quoting function */
289 nisplus_version_report /* version reporting */
293 #define nisplus_lookup_module_info _lookup_module_info
296 static lookup_info *_lookup_list[] = { &_lookup_info };
297 lookup_module_info nisplus_lookup_module_info = { LOOKUP_MODULE_INFO_MAGIC, _lookup_list, 1 };
299 /* End of lookups/nisplus.c */