ubirename: new applet
function old new delta
ubirename_main - 394 +394
packed_usage 30611 30674 +63
applet_names 2530 2540 +10
Signed-off-by: Sven Eisenberg <sven.eisenberg@novero.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/miscutils/ubirename.c b/miscutils/ubirename.c
new file mode 100644
index 0000000..455a494
--- /dev/null
+++ b/miscutils/ubirename.c
@@ -0,0 +1,111 @@
+/* ubirename - port of the ubirename from the mtd-utils package
+ *
+ * A utility to rename one UBI volume.
+ *
+ * 2016-03-01 Sven Eisenberg <sven.eisenberg@novero.com>
+ *
+ * Licensed under GPLv2, see file LICENSE in this source tree.
+ */
+//config:config UBIRENAME
+//config: bool "ubirename"
+//config: default y
+//config: select PLATFORM_LINUX
+//config: help
+//config: Utility to rename UBI volumes
+
+//applet:IF_UBIRENAME(APPLET(ubirename, BB_DIR_USR_SBIN, BB_SUID_DROP))
+
+//kbuild:lib-$(CONFIG_UBIRENAME) += ubirename.o
+
+//usage:#define ubirename_trivial_usage
+//usage: "UBI_DEVICE OLD_VOLNAME NEW_VOLNAME [OLD2 NEW2]..."
+//usage:#define ubirename_full_usage "\n\n"
+//usage: "Rename UBI volumes on UBI_DEVICE"
+
+#include "libbb.h"
+#include <mtd/mtd-user.h>
+
+#ifndef __packed
+# define __packed __attribute__((packed))
+#endif
+
+// from ubi-media.h
+#define UBI_VOL_NAME_MAX 127
+#define UBI_MAX_VOLUMES 128
+// end ubi-media.h
+
+#define UBI_MAX_VOLUME_NAME UBI_VOL_NAME_MAX
+
+// from ubi-user.h
+/* ioctl commands of UBI character devices */
+#define UBI_IOC_MAGIC 'o'
+
+/* Re-name volumes */
+#define UBI_IOCRNVOL _IOW(UBI_IOC_MAGIC, 3, struct ubi_rnvol_req)
+
+/* Maximum amount of UBI volumes that can be re-named at one go */
+#define UBI_MAX_RNVOL 32
+
+struct ubi_rnvol_req {
+ int32_t count;
+ int8_t padding1[12];
+ struct {
+ int32_t vol_id;
+ int16_t name_len;
+ int8_t padding2[2];
+ char name[UBI_MAX_VOLUME_NAME + 1];
+ } ents[UBI_MAX_RNVOL];
+} __packed;
+// end ubi-user.h
+
+int ubirename_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int ubirename_main(int argc, char **argv)
+{
+ struct ubi_rnvol_req *rnvol;
+ const char *ubi_devname;
+ unsigned ubi_devnum;
+ unsigned i, n;
+
+ /* argc can be 4, 6, 8, ... */
+ if ((argc & 1) || (argc >>= 1) < 2)
+ bb_show_usage();
+
+ rnvol = xzalloc(sizeof(*rnvol));
+ rnvol->count = --argc;
+ if (argc > ARRAY_SIZE(rnvol->ents))
+ bb_error_msg_and_die("too many renames requested");
+
+ ubi_devname = argv[1];
+ if (sscanf(ubi_devname, "/dev/ubi%u", &ubi_devnum) != 1)
+ bb_error_msg_and_die("not a ubi device: '%s'", ubi_devname);
+
+ n = 0;
+ argv += 2;
+ while (argv[0]) {
+ for (i = 0; i < UBI_MAX_VOLUMES; i++) {
+ char buf[UBI_VOL_NAME_MAX + 1];
+ char fname[sizeof("/sys/class/ubi/ubi%u_%u/name") + 2 * sizeof(int)*3];
+
+ sprintf(fname, "/sys/class/ubi/ubi%u_%u/name", ubi_devnum, i);
+ if (open_read_close(fname, buf, sizeof(buf)) <= 0)
+ continue;
+
+ strchrnul(buf, '\n')[0] = '\0';
+ if (strcmp(buf, argv[0]) == 0)
+ goto found;
+ }
+ bb_error_msg_and_die("no volume '%s' found", argv[0]);
+ found:
+ rnvol->ents[n].vol_id = i;
+ rnvol->ents[n].name_len = strlen(argv[1]);
+ if (rnvol->ents[n].name_len >= sizeof(rnvol->ents[n].name))
+ bb_error_msg_and_die("new name '%s' is too long", argv[1]);
+ strcpy(rnvol->ents[n].name, argv[1]);
+ n++;
+ argv += 2;
+ }
+
+ xioctl(xopen(ubi_devname, O_RDONLY), UBI_IOCRNVOL, rnvol);
+
+ return 0;
+}