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/* Copyright (C) 2003 Mads Martin Joergensen <mmj at mmj.dk>
*
* $Id: subscriberfuncs.c,v 1.16 2006/04/10 20:40:39 mmj Exp $
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/mman.h>
#include <unistd.h>
#include <dirent.h>
#include <fcntl.h>
#include "mlmmj.h"
#include "subscriberfuncs.h"
#include "mygetline.h"
#include "log_error.h"
#include "wrappers.h"
#include "strgen.h"
#include "memory.h"
off_t find_subscriber(int fd, const char *address)
{
char *start, *cur, *next;
struct stat st;
size_t len;
if(fstat(fd, &st) < 0) {
log_error(LOG_ARGS, "Could not stat fd");
return (off_t)-1;
}
/* No need to check in 0-size file */
if(st.st_size == 0)
return (off_t)-1;
if(!S_ISREG(st.st_mode)) {
log_error(LOG_ARGS, "Non regular file in subscribers.d/");
return (off_t)-1;
}
if((start = mmap(0, st.st_size, PROT_READ, MAP_SHARED, fd, 0)) ==
MAP_FAILED) {
log_error(LOG_ARGS, "Could not mmap fd");
return (off_t)-1;
}
for(next = cur = start; next < start + st.st_size; next++) {
if(*next == '\n') {
len = next - cur;
if((strlen(address) == len) &&
(strncasecmp(address, cur, len) == 0)) {
munmap(start, st.st_size);
return (off_t)(cur - start);
}
cur = next + 1;
}
}
if(next > cur) {
len = next - cur;
if((strlen(address) == len) &&
(strncasecmp(address, cur, len) == 0)) {
munmap(start, st.st_size);
return (off_t)(cur - start);
}
}
munmap(start, st.st_size);
return (off_t)-1;
}
int is_subbed_in(const char *subddirname, const char *address)
{
int retval = 1, subread;
char *subreadname;
off_t suboff;
DIR *subddir;
struct dirent *dp;
if((subddir = opendir(subddirname)) == NULL) {
log_error(LOG_ARGS, "Could not opendir(%s)", subddirname);
exit(EXIT_FAILURE);
}
while((dp = readdir(subddir)) != NULL) {
if(!strcmp(dp->d_name, "."))
continue;
if(!strcmp(dp->d_name, ".."))
continue;
subreadname = concatstr(2, subddirname, dp->d_name);
subread = open(subreadname, O_RDONLY);
if(subread < 0) {
myfree(subreadname);
continue;
}
suboff = find_subscriber(subread, address);
close(subread);
myfree(subreadname);
if(suboff == -1) {
continue;
} else {
retval = 0;
break;
}
}
closedir(subddir);
return retval;
}
int is_subbed(const char *listdir, const char *address)
{
int retval;
char *subddirname;
subddirname = concatstr(2, listdir, "/subscribers.d/");
retval = is_subbed_in(subddirname, address);
myfree(subddirname);
if (retval == 0)
return 0;
subddirname = concatstr(2, listdir, "/digesters.d/");
retval = is_subbed_in(subddirname, address);
myfree(subddirname);
if (retval == 0)
return 0;
subddirname = concatstr(2, listdir, "/nomailsubs.d/");
retval = is_subbed_in(subddirname, address);
myfree(subddirname);
if (retval == 0)
return 0;
return 1;
}
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