/*

  *  Copyright (C) 2002 - 2004 Tomasz Kojm <tkojm@clamav.net>

  *
  *  This program 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 2 of the License, or
  *  (at your option) any later version.
  *
  *  This program 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 this program; if not, write to the Free Software
  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 

 #if HAVE_CONFIG_H
 #include "clamav-config.h"
 #endif
 

 #include <stdio.h>
 #include <stdarg.h>
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
 #include <fcntl.h>
 #include <time.h>
 #include <sys/stat.h>

 #include <errno.h>

 #include <sys/time.h>

 #include <sys/socket.h>

 #if HAVE_SYS_TYPES_H
 #include <sys/types.h>
 #endif

 
 #if HAVE_POLL
 #if HAVE_POLL_H
 #include <poll.h>
 #else /* HAVE_POLL_H */
 #undef HAVE_POLL
 #if HAVE_SYS_SELECT_H
 #include <sys/select.h>
 #endif /* HAVE_SYS_SELECT_H */
 #endif /* HAVE_POLL_H */
 #endif /* HAVE_POLL */

 #include "memory.h"
 #include "cfgparser.h"

 void virusaction(const char *virname, const struct cfgstruct *copt)

 {
 	char *buffer, *pt, *cmd;
 	struct cfgstruct *cpt;
 
 
     if(!(cpt = cfgopt(copt, "VirusEvent")))
 	return;
 
     cmd = strdup(cpt->strarg);
 
     if((pt = strstr(cmd, "%v"))) {

 	buffer = (char *) mcalloc(strlen(cmd) + strlen(virname) + 10, sizeof(char));

 	*pt = 0; pt += 2;
 	strcpy(buffer, cmd);
 	strcat(buffer, virname);
 	strcat(buffer, pt);
 	free(cmd);
 	cmd = strdup(buffer);

 	free(buffer);

     }
 
     /* WARNING: this is uninterruptable ! */
     system(cmd);
 
     free(cmd);
 }

 
 int poll_fd(int fd, int timeout_sec)
 {
 	int retval;
 #ifdef HAVE_POLL
 	struct pollfd poll_data[1];
 
     poll_data[0].fd = fd;
     poll_data[0].events = POLLIN;
     poll_data[0].revents = 0;
 

     if (timeout_sec > 0) {
     	timeout_sec *= 1000;
     }

     while (1) {

     	retval = poll(poll_data, 1, timeout_sec);

 	if (retval == -1) {
    	    if (errno == EINTR) {
 		continue;
 	    }
 	    return -1;
 	}
 	return retval;
     }
 
 #else
 	fd_set rfds;
 	struct timeval tv;
 
     if (fd >= DEFAULT_FD_SETSIZE) {
 	return -1;
     }
 
     while (1) {
 	FD_ZERO(&rfds);
 	FD_SET(fd, &rfds);
 	tv.tv_sec = timeout_sec;
 	tv.tv_usec = 0;
 

 	retval = select(fd+1, &rfds, NULL, NULL,
 			(timeout_sec>0 ? &tv : NULL));

 	if (retval == -1) {
 	    if (errno == EINTR) {
 		continue;
 	    }
 	    return -1;
 	}
 	return retval;
     }
 #endif
 
     return -1;
 }

 
 int is_fd_connected(int fd)
 {
 #ifdef HAVE_POLL
 	struct pollfd poll_data[1];
 
     poll_data[0].fd = fd;
     poll_data[0].events = POLLIN;
     poll_data[0].revents = 0;
 
     if (poll(poll_data, 1, 0) == -1) {
 	return 1;
     }
     if (poll_data[0].revents & POLLHUP) {
 	return 0;
     }
     return 1;
 
 #else
 	fd_set rfds;
 	struct timeval tv;
 	char buff[1];
 
     if (fd >= DEFAULT_FD_SETSIZE) {
         return 1;
     }
 
     FD_ZERO(&rfds);
     FD_SET(fd, &rfds);
     tv.tv_sec = 0;
     tv.tv_usec = 0;
     if (select(fd+1, &rfds, NULL, NULL, &tv) <= 0) {
 	return 1;
     }
     if (FD_ISSET(fd, &rfds)) {
 	if (recv(fd, buff, 1, MSG_PEEK) != 1) {
 	    return 0;
 	}
     }
     return 1;
 #endif
 }

 
 /* Function: writen
 	Try hard to write the specified number of bytes
 */
 int writen(int fd, void *buff, unsigned int count)
 {
 	int retval;
 	unsigned int todo;
 	unsigned char *current;
  
     todo = count;
     current = (unsigned char *) buff;
  
     do {
 	retval = write(fd, current, todo);
 	if (retval < 0) {
 	    if (errno == EINTR) {
 		continue;
 	    }
 	    return -1;
 	}
 	todo -= retval;
 	current += retval;
     } while (todo > 0);
  
     return count;
 }