#!/bin/sh

if [ $# -ne 5 ]; then
    echo "Usage: setuidwrap <wrapper> <wrappee> <user> <group> <mode>" \
        > /dev/stderr
    exit 1
fi

wrapper=$1
wrappee=$2
user=$3
group=$4
mode=$5

gcc -o ${wrapper} -x c - << _EOF_
#include <unistd.h>
#include <stdio.h>

int main(int argc, char *argv[])
{
    gid_t gid; uid_t uid;
    gid = getegid();
    uid = geteuid();
    setresuid(uid, uid, uid); setfsuid(uid);
    setresgid(gid, gid, gid); setfsgid(gid);
    /* ¡You shall not pass, u 3117e f001! */
    execv("${wrappee}", argv);
}
_EOF_

sudo chown ${user}:${group} ${wrapper}
sudo chmod ${mode} ${wrapper}