[dwm] xterm -e [dmenu]

Hi All,
I want to exec some console program, so instead of exec directly the
output from dmenu, I change it to something like,
   xterm -e "outuot from dmenu"
I modified config.h and dwm.c as follows. However I noticed that it
spawn a xterm before dmenu has started. Is there any way to suppress
xterm before dmenu get finished? Any comments to improve the code
are welcome. Or if anyone has already written such patch, I would like
to copy. :-)

/*** config.hc ***/
static Key keys[] = {
        /* modifier key function argument */
        { MODKEY|ShiftMask, XK_p, termspawn, {.v = dmenucmd } },

/*** dwm.c ***/

static void termspawn(const Arg *arg);

void
termspawn(const Arg *arg) {
        /* The double-fork construct avoids zombie processes and keeps the code
         * clean from stupid signal handlers. */
  char *argv[3]; /* the command line argument */
  argv[0] = (char*)termcmd[0];
  argv[1] = "-e";
  argv[2] = ((char **)arg->v)[0];
        if(fork() == 0) {
                if(fork() == 0) {
                        if(dpy)
                                close(ConnectionNumber(dpy));
                        setsid();
                        execvp(*argv, argv);
                        fprintf(stderr, "dwm: execvp %s", ((char **)arg->v)[0]);
                        perror(" failed");
                }
                exit(0);
        }
        wait(0);
}

-- 
regards,
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