gat3way@debian:~$ cat laino.c
int getuid(void)
{
return 0;
}

int getgid(void)
{
return 0;
}gat3way@debian:~$ cc -o laino.so -lc -shared laino.c
laino.c:9:2: warning: no newline at end of file
gat3way@debian:~$ declare -x LD_PRELOAD=./laino.so
gat3way@debian:~$ /bin/bash
bash-2.05b# id
uid=0(root) gid=0(root) euid=1000(gat3way) egid=1000(gat3way) groups=20(dialout),24(cdrom),25(floppy),29(audio),44(video),46(plugdev),1000(gat3way)
bash-2.05b#