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
)
49 int error_error
= FAIL
;
50 uschar
*field_name
= NULL
;
51 nis_result
*nrt
= NULL
;
52 nis_result
*nre
= NULL
;
53 nis_object
*tno
, *eno
;
56 uschar
*p
= query
+ length
;
58 gstring
* yield
= NULL
;
60 do_cache
= do_cache
; /* Placate picky compilers */
62 /* Search backwards for a colon to see if a result field name
65 while (p
> query
&& p
[-1] != ':') p
--;
72 else p
= query
+ length
;
74 /* Now search backwards to find the comma that starts the
77 while (p
> query
&& p
[-1] != ',') p
--;
80 *errmsg
= US
"NIS+ query malformed";
85 /* Look up the data for the table, in order to get the field names,
86 check that we got back a table, and set up pointers so the field
87 names can be scanned. */
89 nrt
= nis_lookup(CS p
, EXPAND_NAME
| NO_CACHE
);
90 if (nrt
->status
!= NIS_SUCCESS
)
92 *errmsg
= string_sprintf("NIS+ error accessing %s table: %s", p
,
93 nis_sperrno(nrt
->status
));
94 if (nrt
->status
!= NIS_NOTFOUND
&& nrt
->status
!= NIS_NOSUCHTABLE
)
98 tno
= nrt
->objects
.objects_val
;
99 if (tno
->zo_data
.zo_type
!= TABLE_OBJ
)
101 *errmsg
= string_sprintf("NIS+ error: %s is not a table", p
);
104 ta
= &(tno
->zo_data
.objdata_u
.ta_data
);
106 /* Now look up the entry in the table, check that we got precisely one
107 object and that it is a table entry. */
109 nre
= nis_list(CS query
, EXPAND_NAME
, NULL
, NULL
);
110 if (nre
->status
!= NIS_SUCCESS
)
112 *errmsg
= string_sprintf("NIS+ error accessing entry %s: %s",
113 query
, nis_sperrno(nre
->status
));
116 if (nre
->objects
.objects_len
> 1)
118 *errmsg
= string_sprintf("NIS+ returned more than one object for %s",
122 else if (nre
->objects
.objects_len
< 1)
124 *errmsg
= string_sprintf("NIS+ returned no data for %s", query
);
127 eno
= nre
->objects
.objects_val
;
128 if (eno
->zo_data
.zo_type
!= ENTRY_OBJ
)
130 *errmsg
= string_sprintf("NIS+ error: %s is not an entry", query
);
134 /* Scan the columns in the entry and in the table. If a result field
135 was given, look for that field; otherwise concatenate all the fields
138 eo
= &(eno
->zo_data
.objdata_u
.en_data
);
139 for (i
= 0; i
< eo
->en_cols
.en_cols_len
; i
++)
141 table_col
*tc
= ta
->ta_cols
.ta_cols_val
+ i
;
142 entry_col
*ec
= eo
->en_cols
.en_cols_val
+ i
;
143 int len
= ec
->ec_value
.ec_value_len
;
144 uschar
*value
= US ec
->ec_value
.ec_value_val
;
146 /* The value may be NULL for a zero-length field. Turn this into an
147 empty string for consistency. Remove trailing whitespace and zero
150 if (value
== NULL
) value
= US
""; else
151 while (len
> 0 && (value
[len
-1] == 0 || isspace(value
[len
-1])))
154 /* Concatenate all fields if no specific one selected */
156 if (field_name
== NULL
)
158 yield
= string_cat (yield
, tc
->tc_name
);
159 yield
= string_catn(yield
, US
"=", 1);
161 /* Quote the value if it contains spaces or is empty */
163 if (value
[0] == 0 || Ustrchr(value
, ' ') != NULL
)
166 yield
= string_catn(yield
, US
"\"", 1);
167 for (j
= 0; j
< len
; j
++)
169 if (value
[j
] == '\"' || value
[j
] == '\\')
170 yield
= string_catn(yield
, US
"\\", 1);
171 yield
= string_catn(yield
, value
+j
, 1);
173 yield
= string_catn(yield
, US
"\"", 1);
176 eyield
= string_catn(yield
, value
, len
);
178 yield
= string_catn(yield
, US
" ", 1);
181 /* When the specified field is found, grab its data and finish */
183 else if (Ustrcmp(field_name
, tc
->tc_name
) == 0)
185 yield
= string_catn(yield
, value
, len
);
190 /* Error if a field name was specified and we didn't find it; if no
191 field name, ensure the concatenated data is zero-terminated. */
194 *errmsg
= string_sprintf("NIS+ field %s not found for %s", field_name
,
197 store_reset(yield
->s
+ yield
->ptr
+ 1);
199 /* Restore the colon in the query, and free result store before
203 if (field_name
) field_name
[-1] = ':';
204 if (nrt
) nis_freeresult(nrt
);
205 if (nre
) nis_freeresult(nre
);
209 *result
= string_from_gstring(yield
);
213 return error_error
; /* FAIL or DEFER */
218 /*************************************************
219 * Quote entry point *
220 *************************************************/
222 /* The only quoting that is necessary for NIS+ is to double any doublequote
223 characters. No options are recognized.
226 s the string to be quoted
227 opt additional option text or NULL if none
229 Returns: the processed string or NULL for a bad option
233 nisplus_quote(uschar
*s
, uschar
*opt
)
239 if (opt
!= NULL
) return NULL
; /* No options recognized */
241 while (*t
!= 0) if (*t
++ == '\"') count
++;
242 if (count
== 0) return s
;
244 t
= quoted
= store_get(Ustrlen(s
) + count
+ 1);
249 if (*s
++ == '\"') *t
++ = '\"';
257 /*************************************************
258 * Version reporting entry point *
259 *************************************************/
261 /* See local README for interface description. */
263 #include "../version.h"
266 nisplus_version_report(FILE *f
)
269 fprintf(f
, "Library version: NIS+: Exim version %s\n", EXIM_VERSION_STR
);
274 static lookup_info _lookup_info
= {
275 US
"nisplus", /* lookup name */
276 lookup_querystyle
, /* query-style lookup */
277 nisplus_open
, /* open function */
278 NULL
, /* check function */
279 nisplus_find
, /* find function */
280 NULL
, /* no close function */
281 NULL
, /* no tidy function */
282 nisplus_quote
, /* quoting function */
283 nisplus_version_report
/* version reporting */
287 #define nisplus_lookup_module_info _lookup_module_info
290 static lookup_info
*_lookup_list
[] = { &_lookup_info
};
291 lookup_module_info nisplus_lookup_module_info
= { LOOKUP_MODULE_INFO_MAGIC
, _lookup_list
, 1 };
293 /* End of lookups/nisplus.c */