path = (char*)malloc(100);

path = "ragHu";

strcpy(pname, path);
free(path);

path = (char*)malloc(100); /* it is not recomened to cast malloc, just include stdlib.h and it'll know what to do */
/* malloc returns NULL when it can not allocate the requested memory, checking the return is a must */
 
pname = (char*)malloc(100);
/* same advise than for previous statement */
 
path = "ragHu";
/* re-assigning path to a literal string, makes the previous malloced memory to be in limbo, you don't have any way of accessing it back or freeing it */
 
strcpy(pname, path);
/* what happens if there's no memory in pname to hold path? */
 
free(path);
/* path doesn't point to any memory that needs to be freed */
/* pname needs to be freed at some point */

path =  "ragHu";

strcpy(path, "ragHu");

 void *malloc(size_t size);