1/*++ 2/* NAME 3/* postconf_dbms 3 4/* SUMMARY 5/* legacy support for database-defined main.cf parameter names 6/* SYNOPSIS 7/* #include <postconf.h> 8/* 9/* void pcf_register_dbms_parameters(param_value, flag_parameter, 10/* local_scope) 11/* const char *param_value; 12/* const char *(flag_parameter) (const char *, int, PCF_MASTER_ENT *); 13/* PCF_MASTER_ENT *local_scope; 14/* DESCRIPTION 15/* This module implements legacy support for database configuration 16/* where main.cf parameter names are generated by prepending 17/* the database name to a database-defined suffix. 18/* 19/* Arguments: 20/* .IP param_value 21/* A parameter value to be searched for "type:table" strings. 22/* When a database type is found that supports legacy-style 23/* configuration, the table name is combined with each of the 24/* database-defined suffixes to generate candidate parameter 25/* names for that database type. 26/* .IP flag_parameter 27/* A function that takes as arguments a candidate parameter 28/* name, parameter flags, and a PCF_MASTER_ENT pointer. The 29/* function will flag the parameter as "used" if it has a 30/* "name=value" entry in the local or global namespace. 31/* .IP local_scope 32/* The local namespace. 33/* DIAGNOSTICS 34/* No explicit diagnostics. 35/* LICENSE 36/* .ad 37/* .fi 38/* The Secure Mailer license must be distributed with this software. 39/* AUTHOR(S) 40/* Wietse Venema 41/* IBM T.J. Watson Research 42/* P.O. Box 704 43/* Yorktown Heights, NY 10598, USA 44/*--*/ 45 46/* System library. */ 47 48#include <sys_defs.h> 49#include <string.h> 50 51/* Utility library. */ 52 53#include <stringops.h> 54#include <split_at.h> 55#include <mac_expand.h> 56#include <dict.h> 57 58/* Global library. */ 59 60#include <mail_conf.h> 61#include <dict_proxy.h> 62#include <dict_ldap.h> 63#include <dict_mysql.h> 64#include <dict_pgsql.h> 65#include <dict_sqlite.h> 66#include <dict_memcache.h> 67 68/* Application-specific. */ 69 70#include <postconf.h> 71 72 /* 73 * SLMs. 74 */ 75#define STR(x) vstring_str(x) 76 77#ifdef LEGACY_DBMS_SUPPORT 78 79 /* 80 * The legacy database interface automagically instantiates a list of 81 * parameters by prepending the table name to database-specific suffixes. 82 */ 83 84/* See ldap_table(5). */ 85 86static const char *pcf_ldap_suffixes[] = { 87 "bind", "bind_dn", "bind_pw", "cache", "cache_expiry", "cache_size", 88 "chase_referrals", "debuglevel", "dereference", "domain", 89 "expansion_limit", "leaf_result_attribute", "query_filter", 90 "recursion_limit", "result_attribute", "result_format", "scope", 91 "search_base", "server_host", "server_port", "size_limit", 92 "special_result_attribute", "terminal_result_attribute", 93 "timeout", "version", 0, 94}; 95 96/* See mysql_table(5). */ 97 98static const char *pcf_mysql_suffixes[] = { 99 "additional_conditions", "dbname", "domain", "expansion_limit", 100 "hosts", "password", "query", "result_format", "select_field", 101 "table", "user", "where_field", 0, 102}; 103 104/* See pgsql_table(5). */ 105 106static const char *pcf_pgsql_suffixes[] = { 107 "additional_conditions", "dbname", "domain", "expansion_limit", 108 "hosts", "password", "query", "result_format", "select_field", 109 "select_function", "table", "user", "where_field", 0, 110}; 111 112/* See sqlite_table(5). */ 113 114static const char *pcf_sqlite_suffixes[] = { 115 "additional_conditions", "dbpath", "domain", "expansion_limit", 116 "query", "result_format", "select_field", "table", "where_field", 117 0, 118}; 119 120/* See memcache_table(5). */ 121 122static const char *pcf_memcache_suffixes[] = { 123 "backup", "data_size_limit", "domain", "flags", "key_format", 124 "line_size_limit", "max_try", "memcache", "retry_pause", 125 "timeout", "ttl", 0, 126}; 127 128 /* 129 * Bundle up the database types and their suffix lists. 130 */ 131typedef struct { 132 const char *db_type; 133 const char **db_suffixes; 134} PCF_DBMS_INFO; 135 136static const PCF_DBMS_INFO pcf_dbms_info[] = { 137 DICT_TYPE_LDAP, pcf_ldap_suffixes, 138 DICT_TYPE_MYSQL, pcf_mysql_suffixes, 139 DICT_TYPE_PGSQL, pcf_pgsql_suffixes, 140 DICT_TYPE_SQLITE, pcf_sqlite_suffixes, 141 DICT_TYPE_MEMCACHE, pcf_memcache_suffixes, 142 0, 143}; 144 145/* pcf_register_dbms_parameters - look for database_type:prefix_name */ 146 147void pcf_register_dbms_parameters(const char *param_value, 148 const char *(flag_parameter) (const char *, int, PCF_MASTER_ENT *), 149 PCF_MASTER_ENT *local_scope) 150{ 151 const PCF_DBMS_INFO *dp; 152 char *bufp; 153 char *db_type; 154 char *prefix; 155 static VSTRING *buffer = 0; 156 static VSTRING *candidate = 0; 157 const char **cpp; 158 159 /* 160 * XXX This does not examine both sides of conditional macro expansion, 161 * and may expand the "wrong" conditional macros. This is the best we can 162 * do for legacy database configuration support. 163 */ 164 if (buffer == 0) 165 buffer = vstring_alloc(100); 166 bufp = pcf_expand_parameter_value(buffer, PCF_SHOW_EVAL, param_value, 167 local_scope); 168 169 /* 170 * Naive parsing. We don't really know if the parameter specifies free 171 * text or a list of databases. 172 */ 173 while ((db_type = mystrtok(&bufp, " ,\t\r\n")) != 0) { 174 175 /* 176 * Skip over "proxy:" maptypes, to emulate the proxymap(8) server's 177 * behavior when opening a local database configuration file. 178 */ 179 while ((prefix = split_at(db_type, ':')) != 0 180 && strcmp(db_type, DICT_TYPE_PROXY) == 0) 181 db_type = prefix; 182 183 /* 184 * Look for database:prefix where the prefix is not a pathname and 185 * the database is a known type. Synthesize candidate parameter names 186 * from the user-defined prefix and from the database-defined suffix 187 * list, and see if those parameters have a "name=value" entry in the 188 * local or global namespace. 189 */ 190 if (prefix != 0 && *prefix != '/' && *prefix != '.') { 191 for (dp = pcf_dbms_info; dp->db_type != 0; dp++) { 192 if (strcmp(db_type, dp->db_type) == 0) { 193 for (cpp = dp->db_suffixes; *cpp; cpp++) { 194 vstring_sprintf(candidate ? candidate : 195 (candidate = vstring_alloc(30)), 196 "%s_%s", prefix, *cpp); 197 flag_parameter(STR(candidate), 198 PCF_PARAM_FLAG_DBMS | PCF_PARAM_FLAG_USER, 199 local_scope); 200 } 201 break; 202 } 203 } 204 } 205 } 206} 207 208#endif 209