$ cat interp.c 
#include <stdio.h>
#include <stdlib.h>


int
main (int argc, char *argv[])
{
    for (int i=0; i<argc; i++) {
        printf("%d: \"%s\"\n", i, argv[i]);
    }
    return 0;
}


$ cat script 
#!/tmp/interp -blah


$ ./script eins zwei
0: "/tmp/interp"
1: "-blah"
2: "./script"
3: "eins"
4: "zwei"


$ ( exec -a null ./script eins zwei )
0: "/tmp/interp"
1: "-blah"
2: "/tmp/script"
3: "eins"
4: "zwei"