Dump Physical memory (RAM)

[Nytro]

/* A simple tool that allows you to dump all the physical memory (RAM) */
/* For more visit: http://vx.netlux.org/wargamevx */
/* greetz: undernet @ #eof-project,#virus and to non3x for the testing */

/* Tested on:
   2.6.20-1.2320.fc5smp i686 athlon
   2.6.22-gentoo-r5 i686 AMD Turion(tm) 64 X2 Mobile Technology TL-50 */


#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>

void Printable(char *str,int size)
{
   int lm = 0;
   while(lm < size)
   {
      if(isprint(str[lm]))
         printf("%c",str[lm]);

      lm++;
   }
}

main(int argc,char *argv[])
{
   int fd,only_print;
   unsigned char *buf = NULL;
   unsigned int addr,page_size = sysconf(_SC_PAGESIZE),tot_mem = page_size*sysconf(_SC_PHYS_PAGES);

   if(argv[1] == NULL)
   {
      printf("DumpRam v0.1 by [WarGame/DoomRiderz]\n");
      printf("Usage: %s [option]\n",argv[0]);
      printf("option can be:\n");   
      printf("-p = only printable chars\n");
      printf("-e = every byte\n");
      exit(EXIT_FAILURE);
   }

   if(getuid( != 0)
   {
      printf("You must be root\n");
      exit(EXIT_FAILURE);
   }

   if(strcmp(argv[1],"-p") == 0)
      only_print = 1;
   else if(strcmp(argv[1],"-e") == 0)
      only_print = 0;
   else
   {
      printf("Invalid option\n");
      exit(EXIT_FAILURE);
   }

   fd = open("/dev/mem",O_RDONLY);

   if(fd < 0)
   {
      perror("/dev/mem");
      exit(EXIT_FAILURE);
   }

   printf("\n\n\n\t** RAM size in Kb: %d\n",tot_mem/1024);
   printf("\t** Size of a page in bytes: %d\n\n\n\n\n",page_size);

   if((buf = malloc(page_size)) == NULL)
   {
      perror("malloc()");
      exit(EXIT_FAILURE);
   }

   while(read(fd,buf,page_size) != -1)
   {
      if(only_print)
         Printable(buf,page_size);
      else
         write(0,buf,page_size);
   }

   close(fd);
   free(buf);
}