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/*
* configfile.c
*
* Methods for accessing the PPTPD config file and searching for
* PPTPD keywords.
*
* $Id: configfile.c,v 1.1.1.1 1999/12/17 16:30:14 patl Exp $
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdio.h>
#include <string.h>
#include "defaults.h"
#include "configfile.h"
/* Local function prototypes */
static FILE *open_config_file(char *filename);
static void close_config_file(FILE * file);
/*
* read_config_file
*
* This method opens up the file specified by 'filename' and searches
* through the file for 'keyword'. If 'keyword' is found any string
* following it is stored in 'value'.
*
* args: filename (IN) - config filename
* keyword (IN) - word to search for in config file
* value (OUT) - value of keyword
*
* retn: -1 on error, 0 if keyword not found, 1 on value success
*/
int read_config_file(char *filename, char *keyword, char *value)
{
FILE *in;
int len;
char buffer[MAX_CONFIG_STRING_SIZE], w[MAX_CONFIG_STRING_SIZE],
v[MAX_CONFIG_STRING_SIZE];
in = open_config_file(filename);
if (in == NULL) {
/* Couldn't find config file, or permission denied */
return -1;
}
while ((fgets(buffer, MAX_CONFIG_STRING_SIZE - 1, in)) != NULL) {
/* ignore long lines */
if (buffer[(len = strlen(buffer)) - 1] != '\n') {
fprintf(stderr, "Long config file line ignored.\n");
do
fgets(buffer, MAX_CONFIG_STRING_SIZE - 1, in);
while (buffer[strlen(buffer) - 1] != '\n');
continue;
}
buffer[len - 1] = '\0';
/* short-circuit comments */
if (buffer[0] == '#')
continue;
/* check if it's what we want */
if (sscanf(buffer, "%s %s", w, v) > 0 && !strcmp(w, keyword)) {
/* found it :-) */
strcpy(value, v);
close_config_file(in);
/* tell them we got it */
return 1;
}
}
close_config_file(in);
/* didn't find it - better luck next time */
return 0;
}
/*
* open_config_file
*
* Opens up the PPTPD config file for reading.
*
* args: filename - the config filename (eg. '/etc/pptpd.conf')
*
* retn: NULL on error, file descriptor on success
*
*/
static FILE *open_config_file(char *filename)
{
FILE *in;
static int first = 1;
if ((in = fopen(filename, "r")) == NULL) {
/* Couldn't open config file */
if (first) {
perror(filename);
first = 0;
}
return NULL;
}
return in;
}
/*
* close_config_file
*
* Closes the PPTPD config file descriptor
*
*/
static void close_config_file(FILE * in)
{
fclose(in);
}
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