* Exim - an Internet mail transport agent *
*************************************************/
-/* Copyright (c) University of Cambridge 1995 - 2009 */
+/* Copyright (c) University of Cambridge 1995 - 2018 */
+/* Copyright (c) The Exim Maintainers 2020 - 2021 */
/* See the file NOTICE for conditions of use and distribution. */
#include "../exim.h"
/* See local README for interface description */
static void *
-dbmdb_open(uschar *filename, uschar **errmsg)
+dbmdb_open(const uschar * filename, uschar ** errmsg)
{
-EXIM_DB *yield;
-EXIM_DBOPEN(filename, O_RDONLY, 0, &yield);
-if (yield == NULL)
- {
- int save_errno = errno;
- *errmsg = string_open_failed(errno, "%s as a %s file", filename, EXIM_DBTYPE);
- errno = save_errno;
- }
+uschar * dirname = string_copy(filename);
+uschar * s;
+EXIM_DB *yield = NULL;
+
+if ((s = Ustrrchr(dirname, '/'))) *s = '\0';
+EXIM_DBOPEN(filename, dirname, O_RDONLY, 0, &yield);
+if (!yield)
+ *errmsg = string_open_failed("%s as a %s file", filename, EXIM_DBTYPE);
return yield;
}
*/
static BOOL
-dbmdb_check(void *handle, uschar *filename, int modemask, uid_t *owners,
+dbmdb_check(void *handle, const uschar *filename, int modemask, uid_t *owners,
gid_t *owngroups, uschar **errmsg)
{
int rc;
-handle = handle; /* Keep picky compilers happy */
#if defined(USE_DB) || defined(USE_TDB) || defined(USE_GDBM)
rc = lf_check_file(-1, filename, S_IFREG, modemask, owners, owngroups,
the keylength in order to include the terminating zero. */
static int
-dbmdb_find(void *handle, uschar *filename, uschar *keystring, int length,
- uschar **result, uschar **errmsg, BOOL *do_cache)
+dbmdb_find(void * handle, const uschar * filename, const uschar * keystring,
+ int length, uschar ** result, uschar ** errmsg, uint * do_cache,
+ const uschar * opts)
{
EXIM_DB *d = (EXIM_DB *)handle;
EXIM_DATUM key, data;
-filename = filename; /* Keep picky compilers happy */
-errmsg = errmsg;
-do_cache = do_cache;
-
EXIM_DATUM_INIT(key); /* Some DBM libraries require datums to */
EXIM_DATUM_INIT(data); /* be cleared before use. */
EXIM_DATUM_DATA(key) = CS keystring;
/* See local README for interface description */
-int
-static dbmnz_find(void *handle, uschar *filename, uschar *keystring, int length,
- uschar **result, uschar **errmsg, BOOL *do_cache)
+static int
+dbmnz_find(void * handle, const uschar * filename, const uschar * keystring,
+ int length, uschar ** result, uschar ** errmsg, uint * do_cache,
+ const uschar * opts)
{
return dbmdb_find(handle, filename, keystring, length-1, result, errmsg,
- do_cache);
+ do_cache, opts);
+}
+
+
+
+/*************************************************
+* Find entry point - zero-joined list key *
+*************************************************/
+
+/*
+ * The parameter passed as a key is a list in normal Exim list syntax.
+ * The elements of that list are joined together on NUL, with no trailing
+ * NUL, to form the key.
+ */
+
+static int
+dbmjz_find(void * handle, const uschar * filename, const uschar * keystring,
+ int length, uschar ** result, uschar ** errmsg, uint * do_cache,
+ const uschar * opts)
+{
+uschar *key_item, *key_buffer, *key_p;
+const uschar *key_elems = keystring;
+int buflen, bufleft, key_item_len, sep = 0;
+
+/* To a first approximation, the size of the lookup key needs to be about,
+or less than, the length of the delimited list passed in + 1. */
+
+buflen = length + 3;
+key_buffer = store_get(buflen, is_tainted(keystring));
+
+key_buffer[0] = '\0';
+
+key_p = key_buffer;
+bufleft = buflen;
+
+/* In all cases of an empty list item, we can set 1 and advance by 1 and then
+pick up the trailing NUL from the previous list item, EXCEPT when at the
+beginning of the output string, in which case we need to supply that NUL
+ourselves. */
+while ((key_item = string_nextinlist(&key_elems, &sep, key_p, bufleft)) != NULL)
+ {
+ key_item_len = Ustrlen(key_item) + 1;
+ if (key_item_len == 1)
+ {
+ key_p[0] = '\0';
+ if (key_p == key_buffer)
+ {
+ key_p[1] = '\0';
+ key_item_len += 1;
+ }
+ }
+
+ bufleft -= key_item_len;
+ if (bufleft <= 0)
+ {
+ /* The string_nextinlist() will stop at buffer size, but we should always
+ have at least 1 character extra, so some assumption has failed. */
+ *errmsg = string_copy(US"Ran out of buffer space for joining elements");
+ return DEFER;
+ }
+ key_p += key_item_len;
+ }
+
+if (key_p == key_buffer)
+ {
+ *errmsg = string_copy(US"empty list key");
+ return FAIL;
+ }
+
+/* We do not pass in the final NULL; if needed, the list should include an
+empty element to put one in. Boundary: key length 1, is a NULL */
+key_item_len = key_p - key_buffer - 1;
+
+DEBUG(D_lookup) debug_printf_indent("NUL-joined key length: %d\n", key_item_len);
+
+/* beware that dbmdb_find() adds 1 to length to get back terminating NUL, so
+because we've calculated the real length, we need to subtract one more here */
+
+return dbmdb_find(handle, filename, key_buffer, key_item_len - 1,
+ result, errmsg, do_cache, opts);
}
lookup_info dbm_lookup_info = {
- US"dbm", /* lookup name */
- lookup_absfile, /* uses absolute file name */
- dbmdb_open, /* open function */
- dbmdb_check, /* check function */
- dbmdb_find, /* find function */
- dbmdb_close, /* close function */
- NULL, /* no tidy function */
- NULL, /* no quoting function */
- dbm_version_report /* version reporting */
+ .name = US"dbm", /* lookup name */
+ .type = lookup_absfile, /* uses absolute file name */
+ .open = dbmdb_open, /* open function */
+ .check = dbmdb_check, /* check function */
+ .find = dbmdb_find, /* find function */
+ .close = dbmdb_close, /* close function */
+ .tidy = NULL, /* no tidy function */
+ .quote = NULL, /* no quoting function */
+ .version_report = dbm_version_report /* version reporting */
};
lookup_info dbmz_lookup_info = {
- US"dbmnz", /* lookup name */
- lookup_absfile, /* uses absolute file name */
- dbmdb_open, /* sic */ /* open function */
- dbmdb_check, /* sic */ /* check function */
- dbmnz_find, /* find function */
- dbmdb_close, /* sic */ /* close function */
- NULL, /* no tidy function */
- NULL, /* no quoting function */
- NULL /* no version reporting (redundant) */
+ .name = US"dbmnz", /* lookup name */
+ .type = lookup_absfile, /* uses absolute file name */
+ .open = dbmdb_open, /* sic */ /* open function */
+ .check = dbmdb_check, /* sic */ /* check function */
+ .find = dbmnz_find, /* find function */
+ .close = dbmdb_close, /* sic */ /* close function */
+ .tidy = NULL, /* no tidy function */
+ .quote = NULL, /* no quoting function */
+ .version_report = NULL /* no version reporting (redundant) */
+};
+
+lookup_info dbmjz_lookup_info = {
+ .name = US"dbmjz", /* lookup name */
+ .type = lookup_absfile, /* uses absolute file name */
+ .open = dbmdb_open, /* sic */ /* open function */
+ .check = dbmdb_check, /* sic */ /* check function */
+ .find = dbmjz_find, /* find function */
+ .close = dbmdb_close, /* sic */ /* close function */
+ .tidy = NULL, /* no tidy function */
+ .quote = NULL, /* no quoting function */
+ .version_report = NULL /* no version reporting (redundant) */
};
#ifdef DYNLOOKUP
#define dbmdb_lookup_module_info _lookup_module_info
#endif
-static lookup_info *_lookup_list[] = { &dbm_lookup_info, &dbmz_lookup_info };
-lookup_module_info dbmdb_lookup_module_info = { LOOKUP_MODULE_INFO_MAGIC, _lookup_list, 2 };
+static lookup_info *_lookup_list[] = { &dbm_lookup_info, &dbmz_lookup_info, &dbmjz_lookup_info };
+lookup_module_info dbmdb_lookup_module_info = { LOOKUP_MODULE_INFO_MAGIC, _lookup_list, 3 };
/* End of lookups/dbmdb.c */
git://git.exim.org / exim.git / blobdiff