1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
5 /* Copyright (c) University of Cambridge 1995 - 2018 */
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
, const uschar
*query
, int length
,
46 uschar
**result
, uschar
**errmsg
, uint
*do_cache
)
48 int error_error
= FAIL
;
49 const uschar
* field_name
= NULL
;
50 nis_result
*nrt
= NULL
;
51 nis_result
*nre
= NULL
;
52 nis_object
*tno
, *eno
;
55 const uschar
* p
= query
+ length
;
56 gstring
* yield
= NULL
;
58 do_cache
= do_cache
; /* Placate picky compilers */
60 /* Search backwards for a colon to see if a result field name
63 while (p
> query
&& p
[-1] != ':') p
--;
65 if (p
> query
) /* get the query without the result-field */
67 uint len
= p
-1 - query
;
69 query
= string_copyn(query
, len
);
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 (int 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
) value
= US
"";
153 while (len
> 0 && (value
[len
-1] == 0 || isspace(value
[len
-1])))
156 /* Concatenate all fields if no specific one selected */
160 yield
= string_cat (yield
, US tc
->tc_name
);
161 yield
= string_catn(yield
, US
"=", 1);
163 /* Quote the value if it contains spaces or is empty */
165 if (value
[0] == 0 || Ustrchr(value
, ' ') != NULL
)
167 yield
= string_catn(yield
, US
"\"", 1);
168 for (int j
= 0; j
< len
; j
++)
170 if (value
[j
] == '\"' || value
[j
] == '\\')
171 yield
= string_catn(yield
, US
"\\", 1);
172 yield
= string_catn(yield
, value
+j
, 1);
174 yield
= string_catn(yield
, US
"\"", 1);
177 yield
= string_catn(yield
, value
, len
);
179 yield
= string_catn(yield
, 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_catn(yield
, 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. */
195 *errmsg
= string_sprintf("NIS+ field %s not found for %s", field_name
,
198 gstring_release_unused(yield
);
200 /* Free result store before finishing. */
203 if (nrt
) nis_freeresult(nrt
);
204 if (nre
) nis_freeresult(nre
);
208 *result
= string_from_gstring(yield
);
212 return error_error
; /* FAIL or DEFER */
217 /*************************************************
218 * Quote entry point *
219 *************************************************/
221 /* The only quoting that is necessary for NIS+ is to double any doublequote
222 characters. No options are recognized.
225 s the string to be quoted
226 opt additional option text or NULL if none
228 Returns: the processed string or NULL for a bad option
232 nisplus_quote(uschar
*s
, uschar
*opt
)
238 if (opt
!= NULL
) return NULL
; /* No options recognized */
240 while (*t
!= 0) if (*t
++ == '\"') count
++;
241 if (count
== 0) return s
;
243 t
= quoted
= store_get(Ustrlen(s
) + count
+ 1, is_tainted(s
));
248 if (*s
++ == '\"') *t
++ = '\"';
256 /*************************************************
257 * Version reporting entry point *
258 *************************************************/
260 /* See local README for interface description. */
262 #include "../version.h"
265 nisplus_version_report(FILE *f
)
268 fprintf(f
, "Library version: NIS+: Exim version %s\n", EXIM_VERSION_STR
);
273 static lookup_info _lookup_info
= {
274 US
"nisplus", /* lookup name */
275 lookup_querystyle
, /* query-style lookup */
276 nisplus_open
, /* open function */
277 NULL
, /* check function */
278 nisplus_find
, /* find function */
279 NULL
, /* no close function */
280 NULL
, /* no tidy function */
281 nisplus_quote
, /* quoting function */
282 nisplus_version_report
/* version reporting */
286 #define nisplus_lookup_module_info _lookup_module_info
289 static lookup_info
*_lookup_list
[] = { &_lookup_info
};
290 lookup_module_info nisplus_lookup_module_info
= { LOOKUP_MODULE_INFO_MAGIC
, _lookup_list
, 1 };
292 /* End of lookups/nisplus.c */