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/*
settings.c
Deals with configuration file (CONF_FILE)
Copyright (C) 2001, Jem E. Berkes
*/
#include "defs.h"
#include <malloc.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
int mem_error()
/* Error when buffer space can not be allocated */
{
fprintf(stderr, "Fatal error: unable to allocate required memory!\n");
fprintf(stderr, "This most likely indicates that the input stream (e-mail)\n");
fprintf(stderr, "has exceedingly long lines\n");
return -1;
}
int tokenize_list(char* thelist, int verbose)
/*
Goes through the list, (optionally displaying each entry) and returns
count of actual entries in the list. Destroys the list.
*/
{
char *token;
int count=0;
token = strtok(thelist, CONF_TOKS);
while (token != NULL)
{
count++;
if (verbose == 1)
printf("[%s] ", token);
token = strtok(NULL, CONF_TOKS);
}
return count;
}
/*
Reads good list and bad list from configuration file
Returns 0 if OK or -1 if failed
*/
int read_lists( char** good_list, char** bad_list,
char** gl_scratch, char** bl_scratch)
{
int line_len, line_num=0, good_len=DEF_BUFSIZE, bad_len=DEF_BUFSIZE;
FILE* cf;
char buffer[DEF_BUFSIZE];
char *temp_bigger;
*good_list = (char*)malloc(DEF_BUFSIZE);
if (*good_list == NULL)
return mem_error();
*bad_list = (char*)malloc(DEF_BUFSIZE);
if (*bad_list == NULL)
{
free(*good_list);
return mem_error();
}
if ( (access(CONF_FILE, R_OK) == -1) ||
((cf=fopen(CONF_FILE, "r")) == NULL) )
{
fprintf(stderr, "Error: unable to open configuration file %s\n", CONF_FILE);
free(*good_list);
free(*bad_list);
return -1;
}
**good_list = 0;
**bad_list = 0;
/*
All lines in cf must begin with "#" (comment), "good:", or "bad:"
*/
while (fgets(buffer, DEF_BUFSIZE, cf) != NULL)
{
++line_num;
line_len = strlen(buffer);
if (line_len == DEF_BUFSIZE-1)
{
fclose(cf);
free(*good_list);
free(*bad_list);
fprintf(stderr, "Error: oversized line in %s line %d\n", CONF_FILE, line_num);
return -1;
}
if (*buffer=='\n' || *buffer=='#')
continue;
else if (strncmp(buffer, "good:", 5) == 0)
{
while ( (strlen(*good_list)+line_len) >= (unsigned int)good_len)
{
if (good_len >= BUF_LIMIT)
temp_bigger = NULL;
else
{
good_len *= 2;
temp_bigger = (char*)malloc(good_len);
}
if (temp_bigger == NULL)
{
free(*good_list);
free(*bad_list);
fclose(cf);
return mem_error();
}
strcpy(temp_bigger, *good_list);
free(*good_list);
*good_list = temp_bigger;
}
strcat(*good_list, buffer+5);
}
else if (strncmp(buffer, "bad:", 4) == 0)
{
while ( (strlen(*bad_list)+line_len) >= (unsigned int)bad_len)
{
if (bad_len >= BUF_LIMIT)
temp_bigger = NULL;
else
{
bad_len *= 2;
temp_bigger = (char*)malloc(bad_len);
}
if (temp_bigger == NULL)
{
free(*good_list);
free(*bad_list);
fclose(cf);
return mem_error();
}
strcpy(temp_bigger, *bad_list);
free(*bad_list);
*bad_list = temp_bigger;
}
strcat(*bad_list, buffer+4);
}
else
{
fclose(cf);
free(*good_list);
free(*bad_list);
fprintf(stderr, "Error: syntax error in %s line %d\n", CONF_FILE, line_num);
return -1;
}
}
fclose(cf);
*gl_scratch = (char*)malloc(good_len);
if (*gl_scratch == NULL)
{
free(*good_list);
free(*bad_list);
return mem_error();
}
*bl_scratch = (char*)malloc(bad_len);
if (bl_scratch == NULL)
{
free(*good_list);
free(*bad_list);
free(*gl_scratch);
return mem_error();
}
strcpy(*gl_scratch, *good_list);
strcpy(*bl_scratch, *bad_list);
if ( (tokenize_list(*gl_scratch, 0)==0) ||
(tokenize_list(*bl_scratch, 0)==0) )
{
free(*good_list);
free(*bad_list);
free(*gl_scratch);
free(*bl_scratch);
fprintf(stderr, "Error: either goodlist or badlist is empty\n");
return -1;
}
return 0;
}
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