view loadtools/lacrc32.c @ 718:098fea21ba13

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.
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 23 Aug 2020 04:55:02 +0000
parents 5385aca4d813
children
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/*
 * This module implements the function for getting a CRC-32 computation
 * from loadagent.
 */

#include <sys/types.h>
#include <stdio.h>
#include <stdint.h>
#include <string.h>
#include <strings.h>
#include <stdlib.h>

extern char target_response_line[];

crc32_on_target(area_base, area_len, retptr)
	u_long area_base, area_len, *retptr;
{
	char arg1[10], arg2[10], *argv[4];
	int stat;
	char *strtoul_endp;

	sprintf(arg1, "%lx", area_base);
	sprintf(arg2, "%lx", area_len);
	argv[0] = "crc32";
	argv[1] = arg1;
	argv[2] = arg2;
	argv[3] = 0;
	tpinterf_make_cmd(argv);
	if (tpinterf_send_cmd() < 0)
		return(-1);
	stat = tpinterf_capture_output_oneline(10);	/* 10 s timeout */
	if (stat != 1) {
errout:		fprintf(stderr, "error: malformed response to crc32 command\n");
		return(-1);
	}
	if (strlen(target_response_line) != 8)
		goto errout;
	*retptr = strtoul(target_response_line, &strtoul_endp, 16);
	if (strtoul_endp != target_response_line + 8)
		goto errout;
	return(0);
}