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authorSven Eisenberg2016-04-03 21:53:12 +0200
committerDenys Vlasenko2016-04-03 22:01:43 +0200
commitb068cf2a7e036da8d0b3533b41886c5605c8139d (patch)
tree0c29bccfabd054c5cafc5dd68e9d161d70bf1286 /libbb
parentcb9264099822505dc2930cfea0b1f9027a02dc06 (diff)
downloadbusybox-b068cf2a7e036da8d0b3533b41886c5605c8139d.zip
busybox-b068cf2a7e036da8d0b3533b41886c5605c8139d.tar.gz
ubirmvol: Implement -N switch for ubirmvol
function old new delta get_volid_by_name - 125 +125 ubi_devnum_from_devname - 43 +43 ubi_tools_main 1215 1220 +5 packed_usage 30674 30655 -19 ubirename_main 394 221 -173 ------------------------------------------------------------------------------ (add/remove: 3/0 grow/shrink: 1/2 up/down: 173/-192) Total: -19 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'libbb')
-rw-r--r--libbb/ubi.c43
1 files changed, 43 insertions, 0 deletions
diff --git a/libbb/ubi.c b/libbb/ubi.c
new file mode 100644
index 0000000..7d3b295
--- /dev/null
+++ b/libbb/ubi.c
@@ -0,0 +1,43 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * Utility routines.
+ *
+ * Copyright (C) 2016 Denys Vlasenko
+ *
+ * Licensed under GPLv2, see file LICENSE in this source tree.
+ */
+//kbuild:lib-y += ubi.o
+
+#include "libbb.h"
+
+// from ubi-media.h
+#define UBI_MAX_VOLUME_NAME 127
+#define UBI_MAX_VOLUMES 128
+
+unsigned FAST_FUNC ubi_devnum_from_devname(const char *str)
+{
+ unsigned ubi_devnum;
+
+ if (sscanf(str, "/dev/ubi%u", &ubi_devnum) != 1)
+ bb_error_msg_and_die("not an UBI device: '%s'", str);
+ return ubi_devnum;
+}
+
+int FAST_FUNC get_volid_by_name(unsigned ubi_devnum, const char *vol_name)
+{
+ unsigned i;
+
+ for (i = 0; i < UBI_MAX_VOLUMES; i++) {
+ char buf[UBI_MAX_VOLUME_NAME + 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(vol_name, buf) == 0)
+ return i;
+ }
+ bb_error_msg_and_die("volume '%s' not found", vol_name);
+}