$ make
make swreality
make[1]: Entering directory `/home/unknown/swr/dist/src'
gcc -c -g3 -Wall  -DNOCRYPT  backup.c
rm -f swreality
gcc  -o swreality act_comm.o act_info.o act_move.o act_obj.o act_wiz.o boards.o
build.o clans.o comm.o comments.o const.o db.o fight.o handler.o hashstr.o id.o
interp.o magic.o makeobjs.o misc.o mud_comm.o mud_prog.o player.o requests.o res
et.o save.o shops.o skills.o special.o tables.o track.o update.o space.o bounty.
o swskills.o hail.o whisper.o backup.o -lm  -lcrypt
backup.o(.text+0x58a): undefined reference to `exists_file'
backup.o(.text+0x66d): undefined reference to `exists_file'
backup.o(.text+0x6ee): undefined reference to `exists_file'
backup.o(.text+0x7d1): undefined reference to `exists_file'
backup.o(.text+0x852): undefined reference to `exists_file'
backup.o(.text+0x935): more undefined references to `exists_file' follow
collect2: ld returned 1 exit status
make[1]: *** [swreality] Error 1
make[1]: Leaving directory `/home/unknown/swr/dist/src'
make: *** [all] Error 2

#include <sys/types.h>
#include <sys/stat.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <unistd.h>
#include <stdio.h>
#include "mud.h"

#define PFILE_BACKUP	"pfileb.tgz"
#define BUILD_BACKUP	"buildb.tgz"
#define AREAS_BACKUP	"areasb.tgz"
#define SYSTM_BACKUP	"systmb.tgz"
#define LOGS_BACKUP	"logsb.tgz"
#define LOG_DIR		"../log"

void do_backup( CHAR_DATA *ch, char *argument )
{
	char cmd[MAX_INPUT_LENGTH];
	char buf[MAX_STRING_LENGTH];
	bool overrideit;
	bool exists_file( char *filen );
		
	argument = one_argument( argument, cmd );
	overrideit = !str_cmp( argument, "yes" );
	
	if( cmd[0] == '\0' )
	  {
		set_char_color( AT_NOTE, ch );
		send_to_char( "Syntax: backup <pfiles/build/sysdata/logs> <yes>\n\r", ch );
		return;
	  }

	if(!str_cmp( cmd, "pfiles" ) )
	  {
		if( exists_file( PFILE_BACKUP ) )
		  {
			send_to_char( "Syntax: backup pfiles yes\n\r", ch );
			send_to_char( "-- There is a previous backup of PFILES, please\n\r", ch );
			send_to_char( "follow the Syntax above to make a NEW backup.\n\r", ch );
			
			if( !overrideit )
			  {
 				send_to_char( "Syntax: backup pfiles yes\n\r", ch );
				return;
			  }
			  else
			  {
			  	send_to_char( "Deleting Previous Backup...\n\r", ch );
				unlink( PFILE_BACKUP );
			  }
			}

		send_to_char( "Creating Player Base Backup...\n\r", ch );
		sprintf( buf, "tar -zcf %s %s*", PFILE_BACKUP, PLAYER_DIR );
		system( buf );
		if( !exists_file( PFILE_BACKUP ) )
		  {
			send_to_char( "Cannot Create Backup, ERROR! Please try again\n\r", ch );
			return;
		  }

		echo_to_all( AT_YELLOW, "PFILE BACKUP CREATED!", ECHOTAR_IMM );
		
		send_to_char( "Pfiles backed-up.", ch );
		return;
	}

	if(!str_cmp( cmd, "build" ) )
	  {
		if( exists_file( BUILD_BACKUP ) )
		  {
			send_to_char( "Syntax: backup build yes\n\r", ch );
			send_to_char( "-- There is a previous backup of BUILD, please\n\r", ch );
			send_to_char( "follow the Syntax above to make a NEW backup.\n\r", ch );
			
			if( !overrideit )
			  {
 				send_to_char( "Syntax: backup build yes\n\r", ch );
				return;
			  }
			  else
			  {
			  	send_to_char( "Deleting Previuos Backup...\n\r", ch );
				unlink( BUILD_BACKUP );
			  }
			}
		send_to_char( "Creating Player Base Backup...\n\r", ch );
		sprintf( buf, "tar -zcf %s %s*", PFILE_BACKUP, PLAYER_DIR );
		system( buf );
		if( !exists_file( PFILE_BACKUP ) )
		  {
			send_to_char( "Cannot Create Backup, ERROR! Please try again\n\r", ch );
			return;
		  }

		echo_to_all( AT_YELLOW, "PFILE BACKUP CREATED!", ECHOTAR_IMM );
		
		send_to_char( "Pfiles backed-up.", ch );
		return;
	}

	if(!str_cmp( cmd, "build" ) )
	  {
		if( exists_file( BUILD_BACKUP ) )
		  {
			send_to_char( "Syntax: backup build yes\n\r", ch );
			send_to_char( "-- There is a previous backup of BUILD, please\n\r", ch );
			send_to_char( "follow the Syntax above to make a NEW backup.\n\r", ch );
			
			if( !overrideit )
			  {
 				send_to_char( "Syntax: backup build yes\n\r", ch );
				return;
			  }
			  else
			  {
			  	send_to_char( "Deleting Previuos Backup...\n\r", ch );
				unlink( BUILD_BACKUP );
			  }
			}

		send_to_char( "Creating Building Direcotry Backup...\n\r", ch );
		sprintf( buf, "tar -zcf %s %s*", BUILD_BACKUP, BUILD_DIR );
		system( buf );
		if( !exists_file( BUILD_BACKUP ) )
		  {
			send_to_char( "Cannot Create Backup, ERROR! Please try again\n\r", ch );
			return;
		  }

		echo_to_all( AT_YELLOW, "BUILD DIR BACKUP CREATED!", ECHOTAR_IMM );
		
		send_to_char( "Build-Areas backed-up.", ch );
		return;
     	}
	if(!str_cmp( cmd, "logs" ) )
	  {
		if( exists_file( LOGS_BACKUP ) )
		  {
			send_to_char( "Syntax: backup logs yes\n\r", ch );
			send_to_char( "-- There is a previous backup of LOGS, please\n\r", ch );
			send_to_char( "follow the Syntax above to make a NEW backup.\n\r", ch );
			
			if( !overrideit )
			  {
 				send_to_char( "Syntax: backup logs yes\n\r", ch );
				return;
			  }
			  else
			  {
			  	send_to_char( "Deleting Previous Backup...\n\r", ch );
				unlink( PFILE_BACKUP );
			  }
			}

		send_to_char( "Creating Log Backup...\n\r", ch );
		sprintf( buf, "tar -zcf %s %s*", LOGS_BACKUP, LOG_DIR );
		system( buf );
		/* Make sure to check, dun want just spitting out send_to_chars */
		if( !exists_file( LOGS_BACKUP ) )
		  {
			send_to_char( "Cannot Create Backup, ERROR! Please try again\n\r", ch );
			return;
		  }

		echo_to_all( AT_YELLOW, "LOG BACKUP CREATED!", ECHOTAR_IMM );
		
		send_to_char( "Logs have been backed up.", ch );
		return;
	}
		
	if(!str_cmp( cmd, "sysdata" ) )
	  {
		if( exists_file( SYSTM_BACKUP ) )
		  {
			send_to_char( "Syntax: backup sysdata yes\n\r", ch );
			send_to_char( "-- There is a previous backup of SYSDATA, please\n\r", ch );
			send_to_char( "follow the Syntax above to make a NEW backup.\n\r", ch );
			
			if( !overrideit )
			  {
 				send_to_char( "Syntax: backup sysdata yes\n\r", ch );
				return;
			  }
			  else
			  {
			  	send_to_char( "Deleting Previous Backup...\n\r", ch );
				unlink( SYSTM_BACKUP );
			  }
			}

		send_to_char( "Creating Sysdata Direcotry Backup...\n\r", ch );
		sprintf( buf, "tar -zcf %s %s*", SYSTM_BACKUP, SYSTEM_DIR );
		system( buf );
		/* Make sure to check, dun want just spitting out send_to_chars */
		if( !exists_file( SYSTM_BACKUP ) )
		  {
			send_to_char( "ERROR: Something happened in the process, try again.\n\r", ch );
			return;
		  }

		echo_to_all( AT_YELLOW, "System-Data has been successfully backed-up.", ECHOTAR_IMM );
		
		send_to_char( "System-Data backed-up.", ch );
		return;
	}
}