/*
  *  Copyright (C) 2009 Sourcefire, Inc.
  *
  *  Author: aCaB
  *
  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License version 2 as
  *  published by the Free Software Foundation.
  *
  *  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., 51 Franklin Street, Fifth Floor, Boston,
  *  MA 02110-1301, USA.
  */
 
 #if HAVE_CONFIG_H
 #include "clamav-config.h"
 #endif
 
 #include <stdio.h>
 #include <string.h>
 #include <sys/types.h>
 #include <sys/stat.h>

 #if HAVE_UNISTD_H

 #include <unistd.h>

 #endif

 #include <fcntl.h>
 #include <errno.h>
 #include <libgen.h>
 
 #include "shared/optparser.h"
 #include "shared/output.h"
 #include "shared/misc.h"

 #include "shared/actions.h"

 
 void (*action)(const char *) = NULL;
 unsigned int notmoved = 0, notremoved = 0;
 
 static char *actarget;
 static int targlen;
 
 
 

 static int getdest(const char *fullpath, char **newname) {

     char *tmps, *filename;
     int fd, i;
 
     tmps = strdup(fullpath);

     if(!tmps) {
         *newname=NULL;
         return -1;
     }

     filename = basename(tmps);
 
     if(!(*newname = (char *)malloc(targlen + strlen(filename) + 6))) {
 	free(tmps);
 	return -1;
     }

     sprintf(*newname, "%s"PATHSEP"%s", actarget, filename);

     for(i=1; i<1000; i++) {
 	fd = open(*newname, O_WRONLY | O_CREAT | O_EXCL, 0600);
 	if(fd >= 0) {
 	    free(tmps);
 	    return fd;
 	}
 	if(errno != EEXIST) break;

 	sprintf(*newname, "%s"PATHSEP"%s.%03u", actarget, filename, i);

     }
     free(tmps);
     free(*newname);
     *newname = NULL;
     return -1;
 }
 
 static void action_move(const char *filename) {
     char *nuname;

     int fd = getdest(filename, &nuname), copied = 0;

     if(fd<0 || (rename(filename, nuname) && (copied=1) && filecopy(filename, nuname))) {

 	logg("!Can't move file %s\n", filename);
 	notmoved++;
 	if(nuname) unlink(nuname);
     } else {

 	if(copied && unlink(filename))

 	    logg("!Can't unlink '%s': %s\n", filename, strerror(errno));
 	else
 	    logg("~%s: moved to '%s'\n", filename, nuname);
     }
 
     if(fd>=0) close(fd);
     if(nuname) free(nuname);
 }
 
 static void action_copy(const char *filename) {
     char *nuname;
     int fd = getdest(filename, &nuname);
 
     if(fd < 0 || filecopy(filename, nuname)) {
 	logg("!Can't copy file '%s'\n", filename);
 	notmoved++;
 	if(nuname) unlink(nuname);
     } else
 	logg("~%s: copied to '%s'\n", filename, nuname);
 
     if(fd>=0) close(fd);
     if(nuname) free(nuname);
 }
 
 static void action_remove(const char *filename) {
     if(unlink(filename)) {

 	logg("!Can't remove file '%s'.\n", filename);

 	notremoved++;
     } else {
 	logg("~%s: Removed.\n", filename);
     }
 }
 

 static int isdir(void) {

     struct stat sb;
     if(stat(actarget, &sb) || !S_ISDIR(sb.st_mode)) {
 	logg("!'%s' doesn't exist or is not a directory\n", actarget);

 	return 0;

     }

     return 1;

 }
 
 int actsetup(const struct optstruct *opts) {
     int move = optget(opts, "move")->enabled;
     if(move || optget(opts, "copy")->enabled) {
 	actarget = optget(opts, move ? "move" : "copy")->strarg;
 	if(!isdir()) return 1;
 	action = move ? action_move : action_copy;
 	targlen = strlen(actarget);
     } else if(optget(opts, "remove")->enabled)
 	action = action_remove;
     return 0;
 }