/*	$CoreSDI: im_unix.c,v 1.53 2001/11/21 05:15:26 alejo Exp $	*//* * Copyright (c) 2001, Core SDI S.A., Argentina * All rights reserved *  * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: *  * 1. Redistributions of source code must retain the above copyright *    notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright *    notice, this list of conditions and the following disclaimer in the *    documentation and/or other materials provided with the distribution. * 3. Neither name of the Core SDI S.A. nor the names of its contributors *    may be used to endorse or promote products derived from this software *    without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. *//* * im_unix -- classic behaviour module for BSD like systems *       * Author: Alejo Sanchez for Core-SDI SA *         from syslogd.c by Eric Allman and Ralph Campbell *     */#include "config.h"#include <sys/types.h>#include <sys/socket.h>#include <sys/param.h>#include <sys/uio.h>#include <sys/un.h>#include <sys/stat.h>#include <netinet/in.h>#include <unistd.h>#include <stdio.h>#include <errno.h>#include <string.h>#include <stdlib.h>#include <signal.h>#include <syslog.h>#include <time.h>#include "../modules.h"#include "../syslogd.h"/* recvfrom() and others like socklen_t, Irix doesn't provide it */   #ifndef HAVE_SOCKLEN_T  typedef int socklen_t;#endif#define DEFAULT_LOGGER "/dev/log"/* * get message * */intim_unix_read(struct i_module *im, int infd, struct im_msg  *ret){	struct sockaddr_un fromunix;	int slen;	ret->im_pid = -1;	ret->im_pri = -1;	ret->im_flags = 0;	slen = sizeof(fromunix);	ret->im_len = recvfrom(im->im_fd, ret->im_msg,	    sizeof(ret->im_msg) - 1, 0, (struct sockaddr *)&fromunix,	    (socklen_t *)&slen);	if (ret->im_len > 0) {		ret->im_msg[ret->im_len] = '\0';		ret->im_host[0] = '\0';	} else if (ret->im_len < 0 && errno != EINTR) {		logerror("recvfrom unix");		ret->im_msg[0] = '\0';		ret->im_len = 0;		ret->im_host[0] = '\0';		return (-1);	}	return (1);}/* * initialize unix input * */intim_unix_init(struct i_module *I, char **argv, int argc){	struct sockaddr_un sunx;	char *logger;	dprintf(MSYSLOG_INFORMATIVE, "im_unix_init: Entering\n");	if (I == NULL || argv == NULL || (argc != 2 && argc != 1)) 		return (-1);	if (argc == 2)		logger = argv[1];	else		logger = DEFAULT_LOGGER;#ifndef SUN_LEN#define SUN_LEN(unp) (strlen((unp)->sun_path) + 2)#endif	(void) unlink(logger);	memset(&sunx, 0, sizeof(sunx));	sunx.sun_family = AF_UNIX;	strncpy(sunx.sun_path, logger, sizeof (sunx.sun_path) - 1);	sunx.sun_path[sizeof (sunx.sun_path) - 1] = '\0';	I->im_fd = socket(AF_UNIX, SOCK_DGRAM, 0);	if (I->im_fd < 0 ||	    bind(I->im_fd, (struct sockaddr *)&sunx, SUN_LEN(&sunx)) < 0 ||	    chmod(logger, 0666) < 0) {		(void) snprintf(I->im_buf, sizeof(I->im_buf),		    "cannot create %s", logger);		logerror(I->im_buf);		dprintf(MSYSLOG_SERIOUS, "cannot create %s (%d)\n",		    logger, errno);		return (-1);	}	I->im_path = strdup(logger);	add_fd_input(I->im_fd , I);	return (1);}intim_unix_close( struct i_module *im){	close(im->im_fd);	if (im->im_path)		unlink(im->im_path);	return (0);}