From: Giorgio Dal Molin <giorgio.dal.mo...@mobotix.com>

The syntax was taken from the corresponding command of the 'mts-utils'
userland package:

# ubirename UBIDEV OLD_NAME NEW_NAME [OLD_NAME NEW_NAME ...]

Signed-off-by: Giorgio Dal Molin <iw3...@arcor.de>
---
 commands/ubi.c | 87 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 87 insertions(+)

diff --git a/commands/ubi.c b/commands/ubi.c
index 26b521f..3479340 100644
--- a/commands/ubi.c
+++ b/commands/ubi.c
@@ -6,6 +6,8 @@
 #include <errno.h>
 #include <getopt.h>
 #include <linux/mtd/mtd.h>
+#include <linux/mtd/ubi.h>
+#include <libgen.h>
 #include <linux/kernel.h>
 #include <linux/stat.h>
 #include <linux/mtd/mtd-abi.h>
@@ -306,3 +308,88 @@ BAREBOX_CMD_START(ubirmvol)
        BAREBOX_CMD_GROUP(CMD_GRP_PART)
        BAREBOX_CMD_HELP(cmd_ubirmvol_help)
 BAREBOX_CMD_END
+
+
+static int get_vol_id(const char *vol_name)
+{
+       struct ubi_volume_desc *desc;
+       struct cdev *vol_cdev;
+       struct ubi_volume_info vi;
+
+       vol_cdev = cdev_by_name(vol_name);
+       if(!vol_cdev) {
+               perror("cdev_by_name");
+               return -1;
+       }
+       desc = ubi_open_volume_cdev(vol_cdev, UBI_READONLY);
+       if(IS_ERR(desc)) {
+               perror("ubi_open_volume_cdev");
+               return -1;
+       }
+       ubi_get_volume_info(desc, &vi);
+       ubi_close_volume(desc);
+
+       return vi.vol_id;
+};
+
+static int do_ubirename(int argc, char *argv[])
+{
+       struct ubi_rnvol_req req;
+       struct cdev *ubi_cd;
+       int i, j, fd, ret;
+
+       if ((argc < 4) || (argc % 2))
+               return COMMAND_ERROR_USAGE;
+
+       req.count = (argc / 2) - 1;
+       if (req.count > UBI_MAX_RNVOL) {
+               printf("too many volume renames. (max: %u)\n", UBI_MAX_RNVOL);
+               return COMMAND_ERROR_USAGE;
+       }
+
+       ubi_cd = cdev_by_name(basename(argv[1]));
+       if(!ubi_cd || !ubi_cd->name || (strlen(ubi_cd->name)>127)) {
+               printf("arg 1 (%s) is not an ubi device.\n", argv[1]);
+               return COMMAND_ERROR_USAGE;
+       }
+
+       for(i=2, j=0; i<argc; ++j, i+=2) {
+               char vol_name[128 + UBI_MAX_VOLUME_NAME];
+
+               snprintf(vol_name, sizeof(vol_name), "%s.%s", ubi_cd->name, 
argv[i]);
+               req.ents[j].vol_id = get_vol_id(vol_name);
+               if(req.ents[j].vol_id < 0) {
+                       printf("'%s' is not a volume name.\n", vol_name);
+                       return COMMAND_ERROR_USAGE;
+               }
+               strncpy(req.ents[j].name, argv[i+1], UBI_MAX_VOLUME_NAME);
+               req.ents[j].name_len = strlen(req.ents[j].name);
+       }
+
+       fd = open(argv[1], O_WRONLY);
+       if (fd < 0) {
+               perror("open");
+               return 1;
+       }
+
+       ret = ioctl(fd, UBI_IOCRNVOL, &req);
+       if (ret)
+               printf("failed to rename: %s\n", strerror(-ret));
+
+       close(fd);
+
+       return ret ? 1 : 0;
+
+}
+
+BAREBOX_CMD_HELP_START(ubirename)
+BAREBOX_CMD_HELP_TEXT("Rename UBI volume(s) from UBIDEV")
+BAREBOX_CMD_HELP_END
+
+BAREBOX_CMD_START(ubirename)
+       .cmd            = do_ubirename,
+       BAREBOX_CMD_DESC("rename UBI volume(s)")
+       BAREBOX_CMD_OPTS("UBIDEV OLD_NAME NEW_NAME [OLD_NAME NEW_NAME ...]")
+       BAREBOX_CMD_GROUP(CMD_GRP_PART)
+       BAREBOX_CMD_HELP(cmd_ubirename_help)
+BAREBOX_CMD_END
-- 
2.10.0


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