/* cfengine for GNU
 
        Copyright (C) 1995
        Free Software Foundation, Inc.
 
   This file is part of GNU cfengine - written and maintained 
   by Mark Burgess, Dept of Computing and Engineering, Oslo College,
   Dept. of Theoretical physics, University of Oslo
 
   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, 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA

*/


/*********************************************************************/
/*                                                                   */
/*  TOOLKIT: the "item file extension" object for cfengine           */
/*                                                                   */
/*********************************************************************/

#include "cf.defs.h"
#include "cf.extern.h"

/*********************************************************************/

int LoadItemList(liststart,file)

struct Item **liststart;
char *file;

{ FILE *fp;
  struct stat statbuf;

if (stat(file,&statbuf) == -1)
   {
   sprintf(OUTPUT,"Couldn't stat %s\n",file);
   CfLog(cfverbose,OUTPUT,"stat");
   return false;
   }

if ((EDITFILESIZE != 0) &&(statbuf.st_size > EDITFILESIZE))
   {
   sprintf(OUTPUT,"File %s is bigger than the limit <editfilesize>\n",file);
   CfLog(cfinform,OUTPUT,"");
   return(false);
   }

if (! S_ISREG(statbuf.st_mode))
   {
   sprintf(OUTPUT,"%s is not a plain file\n",file);
   CfLog(cfinform,OUTPUT,"");
   return false;
   }

if ((fp = fopen(file,"r")) == NULL)
   {
   sprintf(OUTPUT,"Couldn't read file %s for editing\n",file);
   CfLog(cferror,OUTPUT,"fopen");
   return false;
   }


bzero(VBUFF,bufsize); 

while(!feof(fp))
   {
   ReadLine(VBUFF,bufsize,fp);

   if (!feof(fp) || (strlen(VBUFF) != 0))
      {
      AppendItem(liststart,VBUFF,NULL);
      }
   VBUFF[0] = '\0';
   }

fclose(fp);
return (true); 
}

/*********************************************************************/

int SaveItemList(liststart,file,repository)

struct Item *liststart;
char *file, *repository;

{ struct Item *ip;
  struct stat statbuf;
  char new[bufsize],backup[bufsize];
  FILE *fp;
  mode_t mask;

if (stat(file,&statbuf) == -1)
   {
   sprintf(OUTPUT,"Couldn't stat %s, which needed editing!\n",file);
   CfLog(cferror,OUTPUT,"");
   CfLog(cferror,"Check definition in program - is file NFS mounted?\n\n","");
   return false;
   }

strcpy(new,file);
strcat(new,CF_EDITED);
strcpy(backup,file);
strcat(backup,CF_SAVED);
 
unlink(new); /* Just in case of races */ 
 
if ((fp = fopen(new,"w")) == NULL)
   {
   sprintf(OUTPUT,"Couldn't write file %s after editing\n",new);
   CfLog(cferror,OUTPUT,"");
   return false;
   }

for (ip = liststart; ip != NULL; ip=ip->next)
   {
   fprintf(fp,"%s\n",ip->name);
   }

sprintf(OUTPUT,"Edited file %s \n",file);
CfLog(cfinform,OUTPUT,""); 

fclose(fp);

if (! IsItemIn(VREPOSLIST,new))
   {
   if (rename(file,backup) == -1)
      {
      sprintf(OUTPUT,"Error while renaming backup %s\n",file);
      CfLog(cferror,OUTPUT,"rename ");
      unlink(new);
      return false;
      }
   else if (Repository(backup,repository))
      {
      unlink(backup);
      }
   }

if (rename(new,file) == -1)
   {
   sprintf(OUTPUT,"Error while renaming %s\n",file);
   CfLog(cferror,OUTPUT,"rename");
   return false;
   }       

mask = umask(0); 
chmod(file,statbuf.st_mode);                    /* Restore file permissions etc */
chown(file,statbuf.st_uid,statbuf.st_gid);
umask(mask); 
return true;
}

/*********************************************************************/

int CompareToFile(liststart,file)

/* returns true if file on disk is identical to file in memory */

struct Item *liststart;
char *file;

{ FILE *fp;
  struct stat statbuf;
  struct Item *ip = liststart;

Debug("CompareToFile(%s)\n",file);

if (stat(file,&statbuf) == -1)
   {
   return false;
   }

if (liststart == NULL)
   {
   return false;
   }
 
if ((fp = fopen(file,"r")) == NULL)
   {
   sprintf(OUTPUT,"Couldn't read file %s for editing\n",file);
   CfLog(cferror,OUTPUT,"fopen");
   return false;
   }

bzero(VBUFF,bufsize);

for (ip = liststart; ip != NULL; ip=ip->next)
   {
   ReadLine(VBUFF,bufsize,fp);
   
   if (feof(fp) && (ip->next != NULL))
      {
      fclose(fp);
      return false;
      }

   if ((ip->name == NULL) && (strlen(VBUFF) == 0))
      {
      continue;
      }
   
   if (ip->name == NULL)
      {
      fclose(fp);
      return false;
      }
   
   if (strcmp(ip->name,VBUFF) != 0)
      {
      fclose(fp);
      return false;
      }

   VBUFF[0] = '\0';
   }

if (!feof(fp))
   {
   fclose(fp);
   return false;
   }

fclose(fp);
return (true);
}