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.

/*
 * This module handles the lowest level of serial packet Tx
 */

#include <sys/types.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include "pktmux.h"
#include "txpkt.h"

extern int target_fd;

send_pkt_to_target(pkt, pktlen)
	u_char *pkt;
{
	u_char buf[MAX_PKT_TO_TARGET*2+2];
	u_char *cp, *dp, *endp;
	int c;

	endp = pkt + pktlen;
	dp = buf;
	*dp++ = STX;
	for (cp = pkt; cp < endp; cp++) {
		c = *cp;
		if (c == STX || c == DLE)
			*dp++ = DLE;
		*dp++ = c;
	}
	*dp++ = STX;
	write(target_fd, buf, dp - buf);
}