target-utils: added 10 ms delay at the end of abb_power_off() The deosmification of the ABB access code (replacement of osmo_delay_ms() bogus delays with correctly-timed ones, which are significantly shorter) had one annoying side effect: when executing the poweroff command from any of the programs, one last '=' prompt character was being sent (and received by the x86 host) as the Calypso board powers off. With delays being shorter now, the abb_power_off() function was returning and the standalone program's main loop was printing its prompt before the Iota chip fully executed the switch-off sequence! I thought about inserting an endless tight loop at the end of the abb_power_off() function, but the implemented solution of a 10 ms delay is a little nicer IMO because if the DEVOFF operation doesn't happen for some reason in a manual hacking scenario, there won't be an artificial blocker in the form of a tight loop keeping us from further poking around.

/*
 * Both arguments to fc-cal2text must name directories that already exist.
 * Here we implement the check for this requirement.
 */

#include <sys/types.h>
#include <sys/stat.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

check_directory_exists(pathname)
	char *pathname;
{
	struct stat st;

	if (stat(pathname, &st) < 0) {
		perror(pathname);
		exit(1);
	}
	if (!S_ISDIR(st.st_mode)) {
		fprintf(stderr, "error: %s is not a directory\n", pathname);
		exit(1);
	}
	return(0);
}