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/*++
/* NAME
/* cfg_parser 3
/* SUMMARY
/* configuration parser utilities
/* SYNOPSIS
/* #include "cfg_parser.h"
/*
/* CFG_PARSER *cfg_parser_alloc(pname)
/* const char *pname;
/*
/* CFG_PARSER *cfg_parser_free(parser)
/* CFG_PARSER *parser;
/*
/* char *cfg_get_str(parser, name, defval, min, max)
/* const CFG_PARSER *parser;
/* const char *name;
/* const char *defval;
/* int min;
/* int max;
/*
/* int cfg_get_int(parser, name, defval, min, max)
/* const CFG_PARSER *parser;
/* const char *name;
/* int defval;
/* int min;
/* int max;
/*
/* int cfg_get_bool(parser, name, defval)
/* const CFG_PARSER *parser;
/* const char *name;
/* int defval;
/*
/* DICT_OWNER cfg_get_owner(parser)
/* const CFG_PARSER *parser;
/* DESCRIPTION
/* This module implements utilities for parsing parameters defined
/* either as "\fIname\fR = \fBvalue\fR" in a file pointed to by
/* \fIpname\fR (the old MySQL style), or as "\fIpname\fR_\fIname\fR =
/* \fBvalue\fR" in main.cf (the old LDAP style). It unifies the
/* two styles and provides support for range checking.
/*
/* \fIcfg_parser_alloc\fR initializes the parser. The result
/* is NULL if a configuration file could not be opened.
/*
/* \fIcfg_parser_free\fR releases the parser.
/*
/* \fIcfg_get_str\fR looks up a string.
/*
/* \fIcfg_get_int\fR looks up an integer.
/*
/* \fIcfg_get_bool\fR looks up a boolean value.
/*
/* \fIdefval\fR is returned when no value was found. \fImin\fR is
/* zero or specifies a lower limit on the integer value or string
/* length; \fImax\fR is zero or specifies an upper limit on the
/* integer value or string length.
/*
/* Conveniently, \fIcfg_get_str\fR returns \fBNULL\fR if
/* \fIdefval\fR is \fBNULL\fR and no value was found. The returned
/* string has to be freed by the caller if not \fBNULL\fR.
/*
/* cfg_get_owner() looks up the configuration file owner.
/* DIAGNOSTICS
/* Fatal errors: bad string length, malformed numerical value, malformed
/* boolean value.
/* SEE ALSO
/* mail_conf_str(3) string-valued global configuration parameter support
/* mail_conf_int(3) integer-valued configuration parameter support
/* mail_conf_bool(3) boolean-valued configuration parameter support
/* LICENSE
/* .ad
/* .fi
/* The Secure Mailer license must be distributed with this software.
/* AUTHOR(S)
/* Wietse Venema
/* IBM T.J. Watson Research
/* P.O. Box 704
/* Yorktown Heights, NY 10598, USA
/*
/* Liviu Daia
/* Institute of Mathematics of the Romanian Academy
/* P.O. BOX 1-764
/* RO-014700 Bucharest, ROMANIA
/*--*/
/* System library. */
#include "sys_defs.h"
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#ifdef STRCASECMP_IN_STRINGS_H
#include <strings.h>
#endif
/* Utility library. */
#include "msg.h"
#include "mymalloc.h"
#include "vstring.h"
#include "dict.h"
/* Global library. */
#include "mail_conf.h"
/* Application-specific. */
#include "cfg_parser.h"
/* get string from file */
static char *get_dict_str(const struct CFG_PARSER *parser,
const char *name, const char *defval,
int min, int max)
{
const char *strval;
int len;
if ((strval = dict_lookup(parser->name, name)) == 0)
strval = defval;
len = strlen(strval);
if (min && len < min)
msg_fatal("%s: bad string length %d < %d: %s = %s",
parser->name, len, min, name, strval);
if (max && len > max)
msg_fatal("%s: bad string length %d > %d: %s = %s",
parser->name, len, max, name, strval);
return (mystrdup(strval));
}
/* get string from main.cf */
static char *get_main_str(const struct CFG_PARSER *parser,
const char *name, const char *defval,
int min, int max)
{
static VSTRING *buf = 0;
if (buf == 0)
buf = vstring_alloc(15);
vstring_sprintf(buf, "%s_%s", parser->name, name);
return (get_mail_conf_str(vstring_str(buf), defval, min, max));
}
/* get integer from file */
static int get_dict_int(const struct CFG_PARSER *parser,
const char *name, int defval, int min, int max)
{
const char *strval;
char *end;
int intval;
long longval;
if ((strval = dict_lookup(parser->name, name)) != 0) {
errno = 0;
intval = longval = strtol(strval, &end, 10);
if (*strval == 0 || *end != 0 || errno == ERANGE || longval != intval)
msg_fatal("%s: bad numerical configuration: %s = %s",
parser->name, name, strval);
} else
intval = defval;
if (min && intval < min)
msg_fatal("%s: invalid %s parameter value %d < %d",
parser->name, name, intval, min);
if (max && intval > max)
msg_fatal("%s: invalid %s parameter value %d > %d",
parser->name, name, intval, max);
return (intval);
}
/* get integer from main.cf */
static int get_main_int(const struct CFG_PARSER *parser,
const char *name, int defval, int min, int max)
{
static VSTRING *buf = 0;
if (buf == 0)
buf = vstring_alloc(15);
vstring_sprintf(buf, "%s_%s", parser->name, name);
return (get_mail_conf_int(vstring_str(buf), defval, min, max));
}
/* get boolean option from file */
static int get_dict_bool(const struct CFG_PARSER *parser,
const char *name, int defval)
{
const char *strval;
int intval;
if ((strval = dict_lookup(parser->name, name)) != 0) {
if (strcasecmp(strval, CONFIG_BOOL_YES) == 0) {
intval = 1;
} else if (strcasecmp(strval, CONFIG_BOOL_NO) == 0) {
intval = 0;
} else {
msg_fatal("%s: bad boolean configuration: %s = %s",
parser->name, name, strval);
}
} else
intval = defval;
return (intval);
}
/* get boolean option from main.cf */
static int get_main_bool(const struct CFG_PARSER *parser,
const char *name, int defval)
{
static VSTRING *buf = 0;
if (buf == 0)
buf = vstring_alloc(15);
vstring_sprintf(buf, "%s_%s", parser->name, name);
return (get_mail_conf_bool(vstring_str(buf), defval));
}
/* initialize parser */
CFG_PARSER *cfg_parser_alloc(const char *pname)
{
const char *myname = "cfg_parser_alloc";
CFG_PARSER *parser;
DICT *dict;
if (pname == 0 || *pname == 0)
msg_fatal("%s: null parser name", myname);
parser = (CFG_PARSER *) mymalloc(sizeof(*parser));
parser->name = mystrdup(pname);
if (*parser->name == '/' || *parser->name == '.') {
if (dict_load_file_xt(parser->name, parser->name) == 0) {
myfree(parser->name);
myfree((void *) parser);
return (0);
}
parser->get_str = get_dict_str;
parser->get_int = get_dict_int;
parser->get_bool = get_dict_bool;
dict = dict_handle(parser->name);
} else {
parser->get_str = get_main_str;
parser->get_int = get_main_int;
parser->get_bool = get_main_bool;
dict = dict_handle(CONFIG_DICT); /* XXX Use proper API */
}
if (dict == 0)
msg_panic("%s: dict_handle failed", myname);
parser->owner = dict->owner;
return (parser);
}
/* get string */
char *cfg_get_str(const CFG_PARSER *parser, const char *name,
const char *defval, int min, int max)
{
const char *myname = "cfg_get_str";
char *strval;
strval = parser->get_str(parser, name, (defval ? defval : ""), min, max);
if (defval == 0 && *strval == 0) {
/* the caller wants NULL instead of "" */
myfree(strval);
strval = 0;
}
if (msg_verbose)
msg_info("%s: %s: %s = %s", myname, parser->name, name,
(strval ? strval : "<NULL>"));
return (strval);
}
/* get integer */
int cfg_get_int(const CFG_PARSER *parser, const char *name, int defval,
int min, int max)
{
const char *myname = "cfg_get_int";
int intval;
intval = parser->get_int(parser, name, defval, min, max);
if (msg_verbose)
msg_info("%s: %s: %s = %d", myname, parser->name, name, intval);
return (intval);
}
/* get boolean option */
int cfg_get_bool(const CFG_PARSER *parser, const char *name, int defval)
{
const char *myname = "cfg_get_bool";
int intval;
intval = parser->get_bool(parser, name, defval);
if (msg_verbose)
msg_info("%s: %s: %s = %s", myname, parser->name, name,
(intval ? "on" : "off"));
return (intval);
}
/* release parser */
CFG_PARSER *cfg_parser_free(CFG_PARSER *parser)
{
const char *myname = "cfg_parser_free";
if (parser->name == 0 || *parser->name == 0)
msg_panic("%s: null parser name", myname);
if (*parser->name == '/' || *parser->name == '.') {
if (dict_handle(parser->name))
dict_unregister(parser->name);
}
myfree(parser->name);
myfree((void *) parser);
return (0);
}
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