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adds license

/*************************************************************************
* (C) 2025 AITNET ltd - Sofia/Bulgaria - <misho@aitnet.org>
*  by Michael Pounov <misho@elwix.org>
*
* $Author: misho $
* $Id: cmds.c,v 1.3 2026/01/04 18:59:16 misho Exp $
*
**************************************************************************
The ELWIX and AITNET software is distributed under the following
terms:

All of the documentation and software included in the ELWIX and AITNET
Releases is copyrighted by ELWIX - Sofia/Bulgaria <info@elwix.org>

Copyright 2004 - 2025
	by Michael Pounov <misho@elwix.org>.  All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
   notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
   notice, this list of conditions and the following disclaimer in the
   documentation and/or other materials provided with the distribution.
3. All advertising materials mentioning features or use of this software
   must display the following acknowledgement:
This product includes software developed by Michael Pounov <misho@elwix.org>
ELWIX - Embedded LightWeight unIX and its contributors.
4. Neither the name of AITNET nor the names of its contributors
   may be used to endorse or promote products derived from this software
   without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY AITNET AND CONTRIBUTORS ``AS IS'' AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
SUCH DAMAGE.
*/
#include "global.h"
#include "cmds.h"
#include "image.h"


int
cmd_Show(void *lb, int idx, char **args)
{
	ETRACE();

	printf("FW Image file: %s\n", image);
	printf("FW Image size: %zu\n", imgsiz);
	printf("FW Image descriptor: %d\n", imgfd);
	printf("FW Image empty byte: 0x%02x\n\n", fillCh);

	printf("MTD loaded: 0x%zx\n", mtd.mtd_fsiz);
	printf("MTD file: %s\n", mtd.mtd_file);
	printf("MTD offset: 0x%lx\n", mtd.mtd_offset);
	printf("MTD size: 0x%zx\n", mtd.mtd_size);

	return 0;
}

static int
dialog(void *lb, const char *prompt, char *str, int len)
{
	int ret = 0;
	char *p;

	if (!str || len < 1)
		return -1;

	cli_Printf(lb, "%s", prompt);
	p = cliInputLine(lb, -1);
	if (p) {
		cli_freeInput(lb);
		strlcpy(str, p, len);
		e_free(p);

		if ((p = strpbrk(str, "\r\n")))
			*p = 0;
	}

	return ret;
}

static void
loadparams(void *lb, char ** const args)
{
	char str[STRSIZ];

	memset(&mtd, 0, sizeof mtd);
	if (!args[1]) {
		if (!dialog(lb, "Offset=", str, sizeof str))
			mtd.mtd_offset = (off_t) strtol(str, NULL, 0);
	} else
		mtd.mtd_offset = (off_t) strtol(args[1], NULL, 0);
	EVERBOSE(3, "mtd.offset=0x%lx", mtd.mtd_offset);
	if (!args[2]) {
		if (!dialog(lb, "Size=", str, sizeof str))
			mtd.mtd_size = (size_t) strtol(str, NULL, 0);
	} else
		mtd.mtd_size = (size_t) strtol(args[2], NULL, 0);
	EVERBOSE(3, "mtd.size=0x%zx", mtd.mtd_size);
}

static int
openfile(int flgs)
{
	int fd;

	fd = open(mtd.mtd_file, flgs, 0644);
	if (fd == -1) {
		ESYSERR(0);
		return -1;
	}
	if (lseek(imgfd, mtd.mtd_offset, SEEK_SET) == -1) {
		ESYSERR(0);
		close(fd);
		return -1;
	}

	EVERBOSE(1, "mtd_file %s opened #%d", mtd.mtd_file, fd);
	return fd;
}

static void
closefile(int fd)
{
	EVERBOSE(1, "mtd_file closed #%d", fd);
	close(fd);
}

int
cmd_Mtd(void *lb, int idx, char **args)
{
	char str[MAXPATHLEN];
	struct stat st;
	int fd, wlen = 0, rlen = 0;
	u_char buf[BUFSIZ] = { 0 };

	ETRACE();

	args++;
	if (!args[0]) {
		printf("Help: mtd [read|write|erase] <mtd_offset> <mtd_size> [mtd_bin_file]\n");
		return -1;
	} else if (!strncmp(args[0], "write", strlen(args[0]))) {
		loadparams(lb, args);
		if (!args[3]) {
			if (!dialog(lb, "File=", str, sizeof str))
				strlcpy(mtd.mtd_file, str, sizeof mtd.mtd_file);
		} else
			strlcpy(mtd.mtd_file, args[3], sizeof mtd.mtd_file);
		EVERBOSE(3, "mtd.file=%s", mtd.mtd_file);

		if (stat(mtd.mtd_file, &st) == -1) {
			ESYSERR(0);
			memset(&mtd, 0, sizeof mtd);
			return -1;
		} else
			mtd.mtd_fsiz = st.st_size;
		EVERBOSE(3, "mtd.fsiz=%lu", mtd.mtd_fsiz);
		if (mtd.mtd_size < mtd.mtd_fsiz) {
			printf("Error:: MTD file is bigger then reserved space!\n");
			memset(&mtd, 0, sizeof mtd);
			return -1;
		}
		if (imgfd < 3) {
			printf("Error:: image isn't present!\n");
			memset(&mtd, 0, sizeof mtd);
			return -1;
		}
		if (imgsiz < mtd.mtd_offset + mtd.mtd_size) {
			printf("Error:: requested region for write is out of image size\n");
			memset(&mtd, 0, sizeof mtd);
			return -1;
		}

		fd = openfile(O_RDONLY);
		if (fd == -1) {
			memset(&mtd, 0, sizeof mtd);
			return -1;
		}
		while ((rlen = read(fd, buf, sizeof buf)) > 0)
			if ((rlen = write(imgfd, buf, rlen)) == -1)
				break;
			else
				wlen += rlen;
		if (rlen == -1) {
			ESYSERR(0);
			memset(&mtd, 0, sizeof mtd);
		} else if (!rlen)
			printf("MTD partition size=%d was written to image\n", wlen);
		closefile(fd);
	} else if (!strncmp(args[0], "read", strlen(args[0]))) {
		loadparams(lb, args);
		if (!args[3]) {
			if (!dialog(lb, "File=", str, sizeof str))
				strlcpy(mtd.mtd_file, str, sizeof mtd.mtd_file);
		} else
			strlcpy(mtd.mtd_file, args[3], sizeof mtd.mtd_file);
		EVERBOSE(3, "mtd.file=%s", mtd.mtd_file);

		if (imgfd < 3) {
			printf("Error:: image isn't present!\n");
			memset(&mtd, 0, sizeof mtd);
			return -1;
		}
		if (imgsiz < mtd.mtd_offset + mtd.mtd_size) {
			printf("Error:: requested region for read is out of image size\n");
			memset(&mtd, 0, sizeof mtd);
			return -1;
		}

		fd = openfile(O_WRONLY | O_CREAT);
		if (fd == -1) {
			memset(&mtd, 0, sizeof mtd);
			return -1;
		}
		while (wlen < mtd.mtd_size &&
				(rlen = read(imgfd, buf, MIN(mtd.mtd_size - wlen, sizeof buf))) > 0)
			if ((rlen = write(fd, buf, rlen)) == -1)
				break;
			else
				wlen += rlen;
		if (rlen == -1) {
			ESYSERR(0);
			memset(&mtd, 0, sizeof mtd);
		} else
			printf("MTD image partition size=%d was transferred file\n", wlen);
		closefile(fd);
	} else if (!strncmp(args[0], "erase", strlen(args[0]))) {
		loadparams(lb, args);

		if (imgfd < 3) {
			printf("Error:: image isn't present!\n");
			memset(&mtd, 0, sizeof mtd);
			return -1;
		}
		if (imgsiz < mtd.mtd_offset + mtd.mtd_size) {
			printf("Error:: requested region for erase is out of image size\n");
			memset(&mtd, 0, sizeof mtd);
			return -1;
		}
		if (lseek(imgfd, mtd.mtd_offset, SEEK_SET) == -1) {
			ESYSERR(0);
			memset(&mtd, 0, sizeof mtd);
			return -1;
		}
		while (wlen < mtd.mtd_size)
			if ((rlen = write(imgfd, buf, MIN(mtd.mtd_size - wlen, sizeof buf))) == -1)
				break;
			else
				wlen += rlen;
		if (rlen == -1) {
			ESYSERR(0);
			memset(&mtd, 0, sizeof mtd);
		} else
			printf("MTD image partition size=%d was erased\n", wlen);
	} else {
		printf("Error:: unknown command '%s'\n", args[0]);
		return -1;
	}

	return 0;
}

int
cmd_Image(void *lb, int idx, char **args)
{
	u_char buf[BUFSIZ];
	int wlen;
	size_t siz;

	ETRACE();

	args++;
	if (!args[0]) {
		printf("Help: image [mount|umount|erase|name <file>|init <size>]\n");
		return -1;
	} else if (!strncmp(args[0], "mount", strlen(args[0]))) {
		if (imgfd > 2) {
			printf("Error:: Image is already mounted ...\n");
			return -1;
		}
		imageOpen(0);
	} else if (!strncmp(args[0], "umount", strlen(args[0]))) {
		imageClose();
	} else if (!strcmp(args[0], "erase")) {
		if (imgfd > 2) {
			printf("Error:: Image is mounted, cannot be erased ...\n");
			return -1;
		}
		unlink(image);
		EVERBOSE(1, "Erase image %s\n", image);
	} else if (!strncmp(args[0], "name", strlen(args[0]))) {
		if (imgfd > 2) {
			printf("Error:: Image is mounted, cannot be renamed ...\n");
			return -1;
		}
		if (!args[1]) {
			printf("Error:: name isn't found!\n");
			return -1;
		}
		strlcpy(image, args[1], sizeof image);
	} else if (!strncmp(args[0], "init", strlen(args[0]))) {
		if (imgfd > 2) {
			printf("Error:: Image is already mounted, cannot be inited ...\n");
			return -1;
		}
		if (!args[1]) {
			printf("Error:: size isn't found!\n");
			return -1;
		}
		if (imageOpen(O_CREAT) > 2) {
			memset(buf, fillCh, sizeof buf);
			imgsiz = siz = (size_t) strtol(args[1], NULL, 0);
			if (ftruncate(imgfd, imgsiz) == -1) {
				ESYSERR(0);
				imageClose();
				unlink(image);
				return -1;
			}
			lseek(imgfd, 0, SEEK_SET);
			while (siz > 0) {
				wlen = MIN(siz, sizeof buf);
				wlen = write(imgfd, buf, wlen);
				if (wlen < 1) {
					ESYSERR(0);
					imageClose();
					unlink(image);
					return -1;
				} else
					siz -= wlen;
			}
			EVERBOSE(1, "Image '%s' created successful with size=%lu/remain=#%lu bytes\n",
					image, imgsiz, siz);
		}
	} else {
		printf("Error:: unknown command '%s'\n", args[0]);
		return -1;
	}

	return 0;
}

int
cmd_FillCh(void *lb, int idx, char **args)
{
	char str[STRSIZ];

	ETRACE();

	args++;
	if (!args[0]) {
		if (!dialog(lb, "Byte=", str, sizeof str))
			fillCh = (u_char) strtol(str, NULL, 0);
		else
			return -1;
	} else
		fillCh = (u_char) strtol(args[0], NULL, 0);

	return 0;
}