1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
5 /* Copyright (c) The Exim Maintainers 2022 */
6 /* Copyright (c) University of Cambridge 1995 - 2015 */
7 /* See the file NOTICE for conditions of use and distribution. */
10 /* The "type" field in each item is a set of bit flags:
12 lookup_querystyle => this is a query-style lookup,
13 else single-key (+ file) style
14 lookup_absfile => an absolute file name is required,
15 (for single-key style only)
18 typedef struct lookup_info {
19 uschar *name; /* e.g. "lsearch" */
20 int type; /* query/singlekey/abs-file */
21 void *(*open)( /* open function */
22 const uschar *, /* file name for those that have one */
23 uschar **); /* for error message */
24 BOOL (*check)( /* file checking function */
26 const uschar *, /* file name */
27 int, /* modemask for file checking */
28 uid_t *, /* owners for file checking */
29 gid_t *, /* owngroups for file checking */
30 uschar **); /* for error messages */
31 int (*find)( /* find function */
33 const uschar *, /* file name or NULL */
34 const uschar *, /* key or query */
35 int, /* length of key or query */
36 uschar **, /* for returning answer */
37 uschar **, /* for error message */
38 uint *, /* cache TTL, seconds */
39 const uschar *); /* options */
40 void (*close)( /* close function */
42 void (*tidy)(void); /* tidy function */
43 uschar *(*quote)( /* quoting function */
44 uschar *, /* string to quote */
45 uschar *, /* additional data from quote name */
46 unsigned); /* lookup type index */
47 gstring * (*version_report)( /* diagnostic function */
48 gstring *); /* string to appand to */
51 /* This magic number is used by the following lookup_module_info structure
52 for checking API compatibility. It used to be equivalent to the string"LMM3" */
53 #define LOOKUP_MODULE_INFO_MAGIC 0x4c4d4935
54 /* Version 2 adds: version_report */
55 /* Version 3 change: non/cache becomes TTL in seconds */
56 /* Version 4 add: index on quoting function */
57 /* Version 5 change: version report now adds to a gstring */
59 typedef struct lookup_module_info {
61 lookup_info **lookups;
65 /* End of lookupapi.h */