Initial revision

common/cmd_autoscript.c

+/*
+ * (C) Copyright 2001
+ * Kyle Harris, kharris@nexus-tech.net
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+/*
+ * autoscript allows a remote host to download a command file and,
+ * optionally, binary data for automatically updating the target. For
+ * example, you create a new kernel image and want the user to be
+ * able to simply download the image and the machine does the rest.
+ * The kernel image is postprocessed with mkimage, which creates an
+ * image with a script file prepended. If enabled, autoscript will
+ * verify the script and contents of the download and execute the
+ * script portion. This would be responsible for erasing flash,
+ * copying the new image, and rebooting the machine.
+ */
+
+/* #define DEBUG */
+
+#include <common.h>
+#include <command.h>
+#include <image.h>
+#include <malloc.h>
+#include <asm/byteorder.h>
+#include <cmd_boot.h>
+#include <cmd_autoscript.h>
+#if defined(CONFIG_8xx)
+#include <mpc8xx.h>
+#endif
+#ifdef CFG_HUSH_PARSER
+#include <hush.h>
+#endif
+
+#if defined(CONFIG_AUTOSCRIPT) || \
+	 (CONFIG_COMMANDS & CFG_CMD_AUTOSCRIPT)
+
+extern image_header_t header;		/* from cmd_bootm.c */
+int
+autoscript (ulong addr)
+{
+	ulong crc, data, len;
+	image_header_t *hdr = &header;
+	ulong *len_ptr;
+	char *cmd;
+	int rcode = 0;
+	int verify;
+
+	cmd = getenv ("verify");
+	verify = (cmd && (*cmd == 'n')) ? 0 : 1;
+
+
+	memmove (hdr, (char *)addr, sizeof(image_header_t));
+
+	if (ntohl(hdr->ih_magic) != IH_MAGIC) {
+		printf ("Bad magic number\n");
+		return 1;
+	}
+
+	crc = ntohl(hdr->ih_hcrc);
+	hdr->ih_hcrc = 0;
+	len = sizeof (image_header_t);
+	data = (ulong)hdr;
+	if (crc32(0, (char *)data, len) != crc) {
+		printf ("Bad header crc\n");
+		return 1;
+	}
+
+	data = addr + sizeof(image_header_t);
+	len = ntohl(hdr->ih_size);
+
+	if (verify) {
+		if (crc32(0, (char *)data, len) != ntohl(hdr->ih_dcrc)) {
+			printf ("Bad data crc\n");
+			return 1;
+		}
+	}
+
+	if (hdr->ih_type != IH_TYPE_SCRIPT) {
+		printf ("Bad image type\n");
+		return 1;
+	}
+
+	/* get length of script */
+	len_ptr = (ulong *)data;
+
+	if ((len = ntohl(*len_ptr)) == 0) {
+		printf ("Empty Script\n");
+		return 1;
+	}
+
+	debug ("** Script length: %d\n", len);
+
+	if ((cmd = malloc (len + 1)) == NULL) {
+		return 1;
+	}
+
+	while (*len_ptr++);
+
+	/* make sure cmd is null terminated */
+	memmove (cmd, (char *)len_ptr, len);
+	*(cmd + len) = 0;
+
+#ifdef CFG_HUSH_PARSER
+	rcode = parse_string_outer (cmd, FLAG_PARSE_SEMICOLON);
+#else
+	{
+		char *line = cmd;
+		char *next = cmd;
+
+		/*
+		 * break into individual lines,
+		 * and execute each line;
+		 * terminate on error.
+		 */
+		while (*next) {
+			if (*next == '\n') {
+				*next = '\0';
+				/* run only non-empty commands */
+				if ((next - line) > 1) {
+					debug ("** exec: \"%s\"\n",
+						line);
+					if (run_command (line, 0) < 0) {
+						rcode = 1;
+						break;
+					}
+				}
+				line = next + 1;
+			}
+			++next;
+		}
+	}
+#endif
+	free (cmd);
+	return rcode;
+}
+
+#endif	/* CONFIG_AUTOSCRIPT || CFG_CMD_AUTOSCRIPT */
+
+#if (CONFIG_COMMANDS & CFG_CMD_AUTOSCRIPT)
+int
+do_autoscript (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
+{
+	ulong addr;
+	int rcode;
+
+	if (argc < 2) {
+		addr = CFG_LOAD_ADDR;
+	} else {
+		addr = simple_strtoul (argv[1],0,16);
+	}
+
+	printf ("## Executing script at %08lx\n",addr);
+	rcode = autoscript (addr);
+	return rcode;
+}
+#endif /* CFG_CMD_AUTOSCRIPT */