How to assign File data to a Structure?

Here,Iam reading the File Data to a string.Now I want to store the FileData to a structure.How this is posible?pls help me to solve this.

Code:

typedef struct _S_
{
     void          *data;
     struct _S_   *next;
}s

 FILE *fp = NULL;
 //Open the File
 fp = fopen("MyFile.txt","r");
 char *buffer;
 long lSize;
 size_t result;
 
 if(fp)
 {
   fseek (fp , 0 , SEEK_END);
   lSize = ftell (fp);
  rewind (fp);
 
  // allocate memory to contain the whole file:
  buffer = (char*) malloc (sizeof(char)*lSize);
  if (buffer == NULL) 
  {
   puts ("Memory error",stderr); 
   exit (2);
  }
// copy the file into the buffer:
   result = fread (buffer,sizeof(char),lSize,fp);
   if (result != lSize) 
   {
    fputs ("Reading error",stderr); 
    exit (3);
    }
//[I]Here I want to store the buffer to the Structure[B] ( void * data)[/B][/I] 

}  
 fclose(fp);
}