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-rw-r--r--ubifs-utils/Makemodule.am2
-rwxr-xr-xubifs-utils/mount.ubifs101
2 files changed, 103 insertions, 0 deletions
diff --git a/ubifs-utils/Makemodule.am b/ubifs-utils/Makemodule.am
index 59109cc..5c5d99f 100644
--- a/ubifs-utils/Makemodule.am
+++ b/ubifs-utils/Makemodule.am
@@ -47,4 +47,6 @@ UBIFS_EXTRA = \
EXTRA_DIST += $(UBIFS_HEADER) $(UBIFS_EXTRA)
+dist_sbin_SCRIPTS = ubifs-utils/mount.ubifs
+
sbin_PROGRAMS += $(UBIFS_BINS)
diff --git a/ubifs-utils/mount.ubifs b/ubifs-utils/mount.ubifs
new file mode 100755
index 0000000..b94ddc5
--- /dev/null
+++ b/ubifs-utils/mount.ubifs
@@ -0,0 +1,101 @@
+#!/bin/sh
+
+# This script should be installed as /sbin/mount.ubifs. The benefit is that an
+# fstab entry like:
+#
+# mtd=mtddev:home /home ubifs defaults 0 0
+#
+# results in the ubi contained in the mtd named "mtddev" to be attached (if not
+# already done) and then the volume named "home" being mounted to /home.
+
+# This is called by mount with the following options:
+# /sbin/mount.ubifs spec dir [-sfnv] [-N namespace] [-o options] [-t type.subtype]
+
+spec="$1"
+shift
+
+mtdname2num() {
+ local name
+
+ name="$1"
+
+ for d in $(find /sys/class/mtd/ -regex '.*/mtd[0-9]*'); do
+ case "$d" in
+ *ro)
+ continue
+ ;;
+ esac
+
+ if test "$name" = "$(cat "$d/name")"; then
+ local dev mtdnum
+
+ dev="$(basename "$d")"
+ mtdnum="${dev#mtd}"
+ echo "$mtdnum"
+ return
+ fi
+ done
+
+ return 1
+}
+
+mtdnum2ubi() {
+ local mtdnum
+
+ mtdnum="$1"
+
+ for d in $(find /sys/class/ubi/ -regex '.*/ubi[0-9]*'); do
+ case "$d" in
+ *_[0-9]*)
+ continue
+ ;;
+ esac
+
+ if test "$mtdnum" = "$(cat "$d/mtd_num")"; then
+ local ubi
+
+ ubi="$(basename "$d")"
+ echo "$ubi"
+ return;
+ fi
+ done
+
+ return 1
+}
+
+mtdnum2ubi_autoattach() {
+ local mtdnum ubi
+
+ mtdnum="$1"
+
+ ubi="$(mtdnum2ubi "$mtdnum")" && { echo "$ubi"; return; }
+
+ # ubiattach might fail with "mtdX is already attached to ubiY" if there
+ # is more than one mount to do in the same mtd partition. So ignore errors.
+ ubiattach -m "$mtdnum" >&2 || true
+
+ mtdnum2ubi "$mtdnum"
+}
+
+case "$spec" in
+ mtd=*:*)
+ spec="${spec#mtd=}"
+ mtd="${spec%:*}"
+ rspec="${spec#*:}"
+
+ mtdnum="$(mtdname2num "$mtd")" || {
+ echo "Failed to find mtdnum for mtd \"$mtd\""
+ exit 1
+ }
+
+ ubi="$(mtdnum2ubi_autoattach "$mtdnum")" || {
+ echo "Failed to find ubi for mtd \"$mtd\""
+ exit 1
+ }
+
+ spec="$ubi:$rspec"
+
+ ;;
+esac
+
+/bin/mount -i -t ubifs "$spec" "$@"