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/* config file parser functions
*
* (C) 2000-2005 by Harald Welte <laforge@gnumonks.org>
*
* $Id$
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <ulogd/ulogd.h>
#include <ulogd/common.h>
#include <ulogd/conffile.h>
/* points to config entry with error */
struct config_entry *config_errce = NULL;
/* Filename of the config file */
static char *fname = NULL;
/* get_word() - Function to parse a line into words.
* Arguments: line line to parse
* delim possible word delimiters
* buf pointer to buffer where word is returned
* Return value: pointer to first char after word
* This function can deal with "" quotes
*/
static char *get_word(char *line, char *not, char *buf)
{
char *p, *start = NULL, *stop = NULL;
int inquote = 0;
for (p = line; *p; p++) {
if (*p == '"') {
start = p + 1;
inquote = 1;
break;
}
if (!strchr(not, *p)) {
start = p;
break;
}
}
if (!start)
return NULL;
/* determine pointer to one char after word */
for (p = start; *p; p++) {
if (inquote) {
if (*p == '"') {
stop = p;
break;
}
} else {
if (strchr(not, *p)) {
stop = p;
break;
}
}
}
if (!stop)
return NULL;
strncpy(buf, start, (size_t) (stop-start));
*(buf + (stop-start)) = '\0';
/* skip quote character */
if (inquote)
/* yes, we can return stop + 1. If " was the last
* character in string, it now points to NULL-term */
return (stop + 1);
return stop;
}
/***********************************************************************
* PUBLIC INTERFACE
***********************************************************************/
/* register config file with us */
int config_register_file(const char *file)
{
/* FIXME: stat of file */
if (fname)
return 1;
pr_debug("%s: registered config file '%s'\n", __func__, file);
fname = (char *) malloc(strlen(file)+1);
if (!fname)
return -ERROOM;
strcpy(fname, file);
return 0;
}
/* parse config file */
int config_parse_file(const char *section, struct config_keyset *kset)
{
FILE *cfile;
char *args;
int err = 0;
int found = 0;
unsigned int i;
char linebuf[LINE_LEN+1];
char *line = linebuf;
pr_debug("%s: section='%s' file='%s'\n", __func__, section, fname);
cfile = fopen(fname, "r");
if (!cfile)
return -ERROPEN;
/* Search for correct section */
while (fgets(line, LINE_LEN, cfile)) {
char wordbuf[LINE_LEN];
char *wordend;
if (*line == '#')
continue;
if (!(wordend = get_word(line, " \t\n[]", (char *) wordbuf)))
continue;
pr_debug("word: \"%s\"\n", wordbuf);
if (!strcmp(wordbuf, section)) {
found = 1;
break;
}
}
if (!found) {
fclose(cfile);
return -ERRSECTION;
}
/* Parse this section until next section */
while (fgets(line, LINE_LEN, cfile))
{
unsigned int i;
char wordbuf[LINE_LEN];
char *wordend;
pr_debug("line read: %s\n", line);
if (*line == '#')
continue;
if (!(wordend = get_word(line, " =\t\n", (char *) &wordbuf)))
continue;
if (wordbuf[0] == '[' ) {
pr_debug("Next section '%s' encountered\n", wordbuf);
break;
}
pr_debug("parse_file: entering main loop\n");
for (i = 0; i < kset->num_ces; i++) {
struct config_entry *ce = &kset->ces[i];
pr_debug("parse main loop, key: %s\n", ce->key);
if (strcmp(ce->key, (char *) &wordbuf)) {
continue;
}
wordend = get_word(wordend, " =\t\n", (char *) &wordbuf);
args = (char *)&wordbuf;
if (ce->hit && !(ce->options & CONFIG_OPT_MULTI))
{
pr_debug("->ce-hit and option not multi!\n");
config_errce = ce;
err = -ERRMULT;
goto cpf_error;
}
ce->hit++;
switch (ce->type) {
case CONFIG_TYPE_STRING:
if (strlen(args) <
CONFIG_VAL_STRING_LEN ) {
strcpy(ce->u.string, args);
/* FIXME: what if not ? */
}
break;
case CONFIG_TYPE_INT:
ce->u.value = strtoul(args, NULL, 0);
break;
case CONFIG_TYPE_CALLBACK:
(ce->u.parser)(args);
break;
}
break;
}
pr_debug("parse_file: exiting main loop\n");
}
for (i = 0; i < kset->num_ces; i++) {
struct config_entry *ce = &kset->ces[i];
pr_debug("ce post loop, ce=%s\n", ce->key);
if ((ce->options & CONFIG_OPT_MANDATORY) && (ce->hit == 0)) {
pr_debug("Mandatory config directive \"%s\" not found\n",
ce->key);
config_errce = ce;
err = -ERRMAND;
goto cpf_error;
}
}
cpf_error:
fclose(cfile);
return err;
}
void config_stop()
{
free(fname);
}
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