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/* receives messages from a specified unix sockets and writes
* output to specfied file.
*
* Command line options:
* -s name of socket (required)
* -o name of output file (stdout if not given)
* -l add newline after each message received (default: do not add anything)
*
* Part of the testbench for rsyslog.
*
* Copyright 2010 Rainer Gerhards and Adiscon GmbH.
*
* This file is part of rsyslog.
*
* Rsyslog is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Rsyslog 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 Rsyslog. If not, see <http://www.gnu.org/licenses/>.
*
* A copy of the GPL can be found in the file "COPYING" in this distribution.
*/
#include "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <signal.h>
#include <getopt.h>
#include <sys/un.h>
#include <netdb.h>
char *sockName = NULL;
int sock;
int addNL = 0;
/* called to clean up on exit
*/
void
cleanup(void)
{
unlink(sockName);
close(sock);
}
void
doTerm(int __attribute__((unused)) signum)
{
exit(1);
}
void
usage(void)
{
fprintf(stderr, "usage: uxsockrcvr -s /socket/name -o /output/file -l\n"
"-l adds newline after each message received\n"
"-s MUST be specified\n"
"if -o ist not specified, stdout is used\n");
exit(1);
}
int
main(int argc, char *argv[])
{
int opt;
int rlen;
FILE *fp = stdout;
unsigned char data[128*1024];
struct sockaddr_un addr; /* address of server */
struct sockaddr from;
socklen_t fromlen;
if(argc < 2) {
fprintf(stderr, "error: too few arguments!\n");
usage();
}
while((opt = getopt(argc, argv, "s:o:l")) != EOF) {
switch((char)opt) {
case 'l':
addNL = 1;
break;
case 's':
sockName = optarg;
break;
case 'o':
if((fp = fopen(optarg, "w")) == NULL) {
perror(optarg);
exit(1);
}
break;
default:usage();
}
}
if(sockName == NULL) {
fprintf(stderr, "error: -s /socket/name must be specified!\n");
exit(1);
}
if(signal(SIGTERM, doTerm) == SIG_ERR) {
perror("signal(SIGTERM, ...)");
exit(1);
}
if(signal(SIGINT, doTerm) == SIG_ERR) {
perror("signal(SIGINT, ...)");
exit(1);
}
/* Create a UNIX datagram socket for server */
if ((sock = socket(AF_UNIX, SOCK_DGRAM, 0)) < 0) {
perror("server: socket");
exit(1);
}
atexit(cleanup);
/* Set up address structure for server socket */
memset(&addr, 0, sizeof(addr));
addr.sun_family = AF_UNIX;
strcpy(addr.sun_path, sockName);
if (bind(sock, (struct sockaddr*) &addr, sizeof(addr)) < 0) {
close(sock);
perror("server: bind");
exit(1);
}
/* we now run in an endless loop. We do not check who sends us
* data. This should be no problem for our testbench use.
*/
while(1) {
fromlen = sizeof(from);
rlen = recvfrom(sock, data, 2000, 0, &from, &fromlen);
if(rlen == -1) {
perror("uxsockrcvr : recv\n");
exit(1);
} else {
fwrite(data, 1, rlen, fp);
if(addNL)
fputc('\n', fp);
}
}
return 0;
}
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