doc/Host-tools-overview: tiffs-mkfs description updated The first version of tiffs-mkfs did not include a journal file in the created FFS, expecting the firmware to create it on first boot. All historical firmwares prior to a recent FC fix (2020-05) contain a bug in that code path, thus images made with the first version of tiffs-mkfs were only acceptable to very recent FC firmwares. tiffs-mkfs has now been extended to include an empty journal in the created FFS, thus the restriction of working with recent fw only has been lifted.

/*
 * 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);
}