None

[zolali]

hi
when i run gcc cow_attack.c -lpthread code in "dirty cow attack" , i recieve this erres:
cow_attack.c:29:46: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
29 | pthread_create(&pth1, NULL, madviseThread, (void *)file_size);
| ^
cow_attack.c: In function ‘writeThread’:
cow_attack.c:46:5: warning: implicit declaration of function ‘lseek’ [-Wimplicit-function-declaration]
46 | lseek(f, offset, SEEK_SET);
| ^~~~~
cow_attack.c:48:5: warning: implicit declaration of function ‘write’ [-Wimplicit-function-declaration]
48 | write(f, content, strlen(content));
| ^~~~~
cow_attack.c: In function ‘madviseThread’:
cow_attack.c:54:19: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
54 | int file_size = (int) arg;
what should i do?