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/*************************************************
* Exim - an Internet mail transport agent *
*************************************************/
/* Copyright (c) The Exim Maintainers 2020 - 2022 */
/* Copyright (c) University of Cambridge 1995 - 2018 */
/* See the file NOTICE for conditions of use and distribution. */
#include "../exim.h"
#include "lf_functions.h"
#include <sqlite3.h>
/*************************************************
* Open entry point *
*************************************************/
/* See local README for interface description. */
static void *
sqlite_open(const uschar * filename, uschar ** errmsg)
{
sqlite3 *db = NULL;
int ret;
if (!filename || !*filename)
{
DEBUG(D_lookup) debug_printf_indent("Using sqlite_dbfile: %s\n", sqlite_dbfile);
filename = sqlite_dbfile;
}
if (!filename || *filename != '/')
*errmsg = US"absolute file name expected for \"sqlite\" lookup";
else if ((ret = sqlite3_open(CCS filename, &db)) != 0)
{
*errmsg = (void *)sqlite3_errmsg(db);
sqlite3_close(db);
db = NULL;
DEBUG(D_lookup) debug_printf_indent("Error opening database: %s\n", *errmsg);
}
if (db)
sqlite3_busy_timeout(db, 1000 * sqlite_lock_timeout);
return db;
}
/*************************************************
* Find entry point *
*************************************************/
/* See local README for interface description. */
static int
sqlite_callback(void *arg, int argc, char **argv, char **azColName)
{
gstring * res = *(gstring **)arg;
/* For second and subsequent results, insert \n */
if (res)
res = string_catn(res, US"\n", 1);
if (argc > 1)
{
/* For multiple fields, include the field name too */
for (int i = 0; i < argc; i++)
{
uschar * value = US(argv[i] ? argv[i] : "<NULL>");
res = lf_quote(US azColName[i], value, Ustrlen(value), res);
}
}
else
res = string_cat(res, argv[0] ? US argv[0] : US "<NULL>");
/* always return a non-null gstring, even for a zero-length string result */
*(gstring **)arg = res ? res : string_get(1);
return 0;
}
static int
sqlite_find(void * handle, const uschar * filename, const uschar * query,
int length, uschar ** result, uschar ** errmsg, uint * do_cache,
const uschar * opts)
{
int ret;
gstring * res = NULL;
ret = sqlite3_exec(handle, CS query, sqlite_callback, &res, CSS errmsg);
if (ret != SQLITE_OK)
{
debug_printf_indent("sqlite3_exec failed: %s\n", *errmsg);
return FAIL;
}
if (!res) *do_cache = 0; /* on fail, wipe cache */
*result = string_from_gstring(res);
return OK;
}
/*************************************************
* Close entry point *
*************************************************/
/* See local README for interface description. */
static void sqlite_close(void *handle)
{
sqlite3_close(handle);
}
/*************************************************
* Quote entry point *
*************************************************/
/* From what I have found so far, the only character that needs to be quoted
for sqlite is the single quote, and it is quoted by doubling.
Arguments:
s the string to be quoted
opt additional option text or NULL if none
idx lookup type index
Returns: the processed string or NULL for a bad option
*/
static uschar *
sqlite_quote(uschar * s, uschar * opt, unsigned idx)
{
int c, count = 0;
uschar * t = s, * quoted;
if (opt) return NULL; /* No options recognized */
while ((c = *t++)) if (c == '\'') count++;
count += t - s;
t = quoted = store_get_quoted(count + 1, s, idx);
while ((c = *s++))
{
if (c == '\'') *t++ = '\'';
*t++ = c;
}
*t = 0;
return quoted;
}
/*************************************************
* Version reporting entry point *
*************************************************/
/* See local README for interface description. */
#include "../version.h"
gstring *
sqlite_version_report(gstring * g)
{
g = string_fmt_append(g,
"Library version: SQLite: Compile: %s\n"
" Runtime: %s\n",
SQLITE_VERSION, sqlite3_libversion());
#ifdef DYNLOOKUP
g = string_fmt_append(g,
" Exim version %s\n", EXIM_VERSION_STR);
#endif
return g;
}
static lookup_info _lookup_info = {
.name = US"sqlite", /* lookup name */
.type = lookup_absfilequery, /* query-style lookup, starts with file name */
.open = sqlite_open, /* open function */
.check = NULL, /* no check function */
.find = sqlite_find, /* find function */
.close = sqlite_close, /* close function */
.tidy = NULL, /* no tidy function */
.quote = sqlite_quote, /* quoting function */
.version_report = sqlite_version_report /* version reporting */
};
#ifdef DYNLOOKUP
#define sqlite_lookup_module_info _lookup_module_info
#endif
static lookup_info *_lookup_list[] = { &_lookup_info };
lookup_module_info sqlite_lookup_module_info = { LOOKUP_MODULE_INFO_MAGIC, _lookup_list, 1 };
/* End of lookups/sqlite.c */
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