1 files changed, 305 insertions, 0 deletions
diff --git a/ubi-utils/src/ubiupdate.c b/ubi-utils/src/ubiupdate.c
new file mode 100644
index 0000000..4133194
--- /dev/null
+++ b/ubi-utils/src/ubiupdate.c
@@ -0,0 +1,305 @@
+/*
+ * Copyright (c) International Business Machines Corp., 2006
+ *
+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+/*
+ * An utility to update UBI volumes.
+ *
+ * Authors: Frank Haverkamp
+ *          Joshua W. Boyer
+ *          Artem Bityutskiy
+ */
+
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdint.h>
+#include <getopt.h>
+#include <stdarg.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/stat.h>
+
+#include <libubi.h>
+#include "common.h"
+
+#define PROGRAM_VERSION "1.3"
+#define PROGRAM_NAME    "ubiupdate"
+
+struct args {
+	int truncate;
+	const char *node;
+	const char *img;
+};
+
+static struct args myargs = {
+	.truncate = 0,
+	.img = NULL,
+};
+
+static const char *doc = "Version " PROGRAM_VERSION "\n"
+	PROGRAM_NAME " - a tool to write data to UBI volumes.";
+
+static const char *optionsstr =
+"-n, --vol_id=<volume id>   ID of UBI volume to update\n"
+"-t, --truncate             truncate volume (wipe it out)\n"
+"-h, --help                 print help message\n"
+"-V, --version              print program version";
+
+static const char *usage =
+"Usage: " PROGRAM_NAME " <UBI volume node file name> [-t] [-h] [-V] [--truncate] [--help]\n"
+"\t\t[--version] <image file>\n\n"
+"Example 1: " PROGRAM_NAME " /dev/ubi0_1 fs.img - write file \"fs.img\" to UBI volume /dev/ubi0_1\n"
+"Example 2: " PROGRAM_NAME " /dev/ubi0_1 -t - wipe out UBI volume /dev/ubi0_1";
+
+struct option long_options[] = {
+	{ .name = "truncate", .has_arg = 0, .flag = NULL, .val = 't' },
+	{ .name = "help",     .has_arg = 0, .flag = NULL, .val = 'h' },
+	{ .name = "version",  .has_arg = 0, .flag = NULL, .val = 'V' },
+	{ NULL, 0, NULL, 0}
+};
+
+static int parse_opt(int argc, char * const argv[], struct args *args)
+{
+	while (1) {
+		int key;
+
+		key = getopt_long(argc, argv, "n:thV", long_options, NULL);
+		if (key == -1)
+			break;
+
+		switch (key) {
+		case 't':
+			args->truncate = 1;
+			break;
+
+		case 'h':
+			fprintf(stderr, "%s\n\n", doc);
+			fprintf(stderr, "%s\n\n", usage);
+			fprintf(stderr, "%s\n", optionsstr);
+			exit(0);
+
+		case 'V':
+			fprintf(stderr, "%s\n", PROGRAM_VERSION);
+			exit(0);
+
+		case ':':
+			errmsg("parameter is missing");
+			return -1;
+
+		default:
+			fprintf(stderr, "Use -h for help\n");
+			exit(-1);
+		}
+	}
+
+	return 0;
+}
+
+static int truncate_volume(libubi_t libubi)
+{
+	int err, fd;
+
+	fd = open(myargs.node, O_RDWR);
+	if (fd == -1) {
+		errmsg("cannot open \"%s\"", myargs.node);
+		perror("open");
+		return -1;
+	}
+
+	err = ubi_update_start(libubi, fd, 0);
+	if (err) {
+		errmsg("cannot truncate volume \"%s\"", myargs.node);
+		perror("ubi_update_start");
+		close(fd);
+		return -1;
+	}
+
+	close(fd);
+	return 0;
+}
+
+static int ubi_write(int fd, const void *buf, int len)
+{
+	int ret;
+
+	while (len) {
+		ret = write(fd, buf, len);
+		if (ret < 0) {
+			if (errno == EINTR) {
+				warnmsg("do not interrupt me!");
+				continue;
+			}
+			errmsg("cannot write %d bytes to volume \"%s\"",
+			       len, myargs.node);
+			perror("write");
+			return -1;
+		}
+
+		if (ret == 0) {
+			errmsg("cannot write %d bytes to volume \"%s\"",
+			       len, myargs.node);
+			return -1;
+		}
+
+		len -= ret;
+		buf += ret;
+	}
+
+	return 0;
+}
+
+static int update_volume(libubi_t libubi, struct ubi_vol_info *vol_info)
+{
+	int err, fd, ifd;
+	long long bytes;
+	struct stat st;
+	char *buf;
+
+	buf = malloc(vol_info->eb_size);
+	if (!buf) {
+		errmsg("cannot allocate %d bytes of memory", vol_info->eb_size);
+		return -1;
+	}
+
+	err = stat(myargs.img, &st);
+	if (err < 0) {
+		errmsg("stat failed on \"%s\"", myargs.node);
+		goto out_free;
+	}
+
+	bytes = st.st_size;
+	if (bytes > vol_info->rsvd_bytes) {
+		errmsg("\"%s\" (size %lld) will not fit volume \"%s\" (size %lld)",
+		       myargs.img, bytes, myargs.node, vol_info->rsvd_bytes);
+		goto out_free;
+	}
+
+	fd = open(myargs.node, O_RDWR);
+	if (fd == -1) {
+		errmsg("cannot open UBI volume \"%s\"", myargs.node);
+		perror("open");
+		goto out_free;
+	}
+
+	ifd = open(myargs.img, O_RDONLY);
+	if (ifd == -1) {
+		errmsg("cannot open \"%s\"", myargs.img);
+		perror("open");
+		goto out_close1;
+	}
+
+	err = ubi_update_start(libubi, fd, bytes);
+	if (err) {
+		errmsg("cannot start volume \"%s\" update", myargs.node);
+		perror("ubi_update_start");
+		goto out_close;
+	}
+
+	while (bytes) {
+		int tocopy = vol_info->eb_size;
+
+		if (tocopy > bytes)
+			tocopy = bytes;
+
+		err = read(ifd, buf, tocopy);
+		if (err != tocopy) {
+			if (errno == EINTR) {
+				warnmsg("do not interrupt me!");
+				continue;
+			} else {
+				errmsg("cannot read %d bytes from \"%s\"",
+				       tocopy, myargs.img);
+				perror("read");
+				goto out_close;
+			}
+		}
+
+		err = ubi_write(fd, buf, tocopy);
+		if (err)
+			goto out_close;
+		bytes -= tocopy;
+	}
+
+	close(ifd);
+	close(fd);
+	free(buf);
+	return 0;
+
+out_close:
+	close(ifd);
+out_close1:
+	close(fd);
+out_free:
+	free(buf);
+	return -1;
+}
+
+int main(int argc, char * const argv[])
+{
+	int err;
+	libubi_t libubi;
+	struct ubi_vol_info vol_info;
+
+	if (argc < 2 || argv[1][0] == '-') {
+		errmsg("UBI device name was not specified (use -h for help)");
+		return -1;
+	}
+
+	if (argc < 3) {
+		errmsg("too few arguments (use -h for help)");
+		return -1;
+	}
+
+	myargs.img = argv[argc - 1];
+	myargs.node = argv[1];
+
+	parse_opt(argc, argv, &myargs);
+
+	if (!myargs.img && !myargs.truncate) {
+		errmsg("incorrect arguments, use -h for help");
+	}
+
+	libubi = libubi_open();
+	if (libubi == NULL) {
+		perror("Cannot open libubi");
+		goto out_libubi;
+	}
+
+	err = ubi_get_vol_info(libubi, myargs.node, &vol_info);
+	if (err) {
+		errmsg("cannot get information about UBI volume \"%s\"",
+		       myargs.node);
+		perror("ubi_get_dev_info");
+		goto out_libubi;
+	}
+
+	if (myargs.truncate)
+		err = truncate_volume(libubi);
+	else
+		err = update_volume(libubi, &vol_info);
+	if (err)
+		goto out_libubi;
+
+	libubi_close(libubi);
+	return 0;
+
+out_libubi:
+	libubi_close(libubi);
+	return -1;
+}