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/* config file parser functions
*
* (C) 2000 by Harald Welte <laforge@gnumonks.org>
*
* $Id: conffile.c,v 1.7 2000/11/16 17:20:52 laforge Exp $
*
* This code is distributed under the terms of GNU GPL */
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include "conffile.h"
#ifdef DEBUG_CONF
#define DEBUGC(format, args...) fprintf(stderr, format, ## args)
#else
#define DEBUGC(format, args...)
#endif
/* linked list of all registered configuration directives */
static config_entry_t *config = NULL;
/* points to config entry with error */
config_entry_t *config_errce = NULL;
/* Filename of the config file */
static char *fname = NULL;
/* the the next word in string */
static char *get_word(const char *string)
{
int len;
char *word, *space;
space = strrchr(string, ' ');
if (!space) {
space = strrchr(string, '\t');
if (!space)
return NULL;
}
len = space - string;
if (!len)
return NULL;
word = (char *) malloc(len+1);
if (!word)
return NULL;
strncpy(word, string, len);
// if (*(word + len) == '\n')
*(word + len) = '\0';
return word;
}
/* do we have a config directive for this name */
static int config_iskey(char *name)
{
config_entry_t *ce;
for (ce = config; ce; ce = ce->next) {
if (!strcmp(name, ce->key))
return 0;
}
return 1;
}
/***********************************************************************
* PUBLIC INTERFACE
***********************************************************************/
/* register linked list of config directives with us */
int config_register_key(config_entry_t *ce)
{
config_entry_t *myentry;
if (!ce)
return 1;
/* prepend our list to the global config list */
for (myentry = ce; myentry->next; myentry = myentry->next) {
}
myentry->next = config;
config = ce;
return 0;
}
/* register config file with us */
int config_register_file(const char *file)
{
/* FIXME: stat of file */
if (fname)
return 1;
fname = (char *) malloc(strlen(file)+1);
if (!fname)
return -ERROOM;
strcpy(fname, file);
return 0;
}
/* parse config file */
int config_parse_file(int final)
{
FILE *cfile;
char *line, *word, *args;
config_entry_t *ce;
int err = 0;
line = (char *) malloc(LINE_LEN+1);
if (!line)
return -ERROOM;
cfile = fopen(fname, "r");
if (!cfile) {
free(line);
return -ERROPEN;
}
while (fgets(line, LINE_LEN, cfile))
{
DEBUGC("line read: %s\n", line);
if (*line == '#')
continue;
word = get_word(line);
if (!word)
continue;
#if 0
/* if we do the final parse and word is not a config key */
if (final && config_iskey(word)) {
DEBUGC("final and key '%s' not found\n", word);
err = -ERRUNKN;
goto cpf_error;
}
#endif
args = line + strlen(word) + 1;
*(args + strlen(args) - 1 ) = '\0';
DEBUGC("parse_file: entering main loop\n");
for (ce = config; ce; ce = ce->next) {
DEBUGC("parse main loop, key: %s\n", ce->key);
if (strcmp(ce->key, word)) {
continue;
}
if (ce->hit && !(ce->options & CONFIG_OPT_MULTI))
{
DEBUGC("->ce-hit and option not multi!\n");
config_errce = ce;
err = -ERRMULT;
goto cpf_error;
}
if (final)
ce->hit++;
switch (ce->type) {
case CONFIG_TYPE_STRING:
if (strlen(args) <
CONFIG_VAL_STRING_LEN ) {
strcpy(ce->u.string, args);
}
break;
case CONFIG_TYPE_INT:
ce->u.value = atoi(args);
break;
case CONFIG_TYPE_CALLBACK:
(ce->u.parser)(args);
break;
}
break;
}
DEBUGC("parse_file: exiting main loop\n");
}
for (ce = config; ce; ce = ce->next) {
DEBUGC("ce post loop, ce=%s\n", ce->key);
if ((ce->options & CONFIG_OPT_MANDATORY) && (ce->hit == 0) && final) {
DEBUGC("mandatory config directive %s not found\n",
ce->key);
config_errce = ce;
err = -ERRMAND;
goto cpf_error;
}
}
cpf_error:
free(line);
fclose(cfile);
return err;
}
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