Revert "Revert "fsck: add the ability to specify mount points to check""

This reverts commit 5a3599df8a.

After review, I am bringing this back to the tree.

conf.d/fsck

@@ -13,6 +13,13 @@
 #fsck_passno=">1"
 #fsck_passno="<2"
 
+# If passno is not enough granularity, you can also specify mountpoints to
+# check. This should NOT be used for the default non-multiplexed fsck, or your
+# system might not be checked. Additionally, it is mutually exclusive with
+# the fsck_passno setting.
+#fsck_mnt=""
+#fsck_mnt="/home"
+
 # Most modern fs's don't require a full fsck on boot, but for those that do
 # it may be advisable to skip this when running on battery.
 # WARNING: Do not turn this off if you have any JFS partitions.

init.d/fsck.in

@@ -48,8 +48,13 @@ start()
 
 	if [ -n "$fsck_passno" ]; then
 		check_extra="[passno $fsck_passno] $check_extra"
+		if -n "$fsck_mnt" ]; then
+			eerror "Only 1 of fsck_passno and fsck_mnt must be set!"
+			return 1
+		fi
 	fi
 	ebegin "Checking local filesystems $check_extra"
+	# Append passno mounts
 	for p in $fsck_passno; do
 		local IFS="$_IFS"
 		case "$p" in
@@ -58,10 +63,16 @@ start()
 		set -- "$@" $(fstabinfo --passno "$p")
 		unset IFS
 	done
+	# Append custom mounts
+	for m in $fsck_mnt ; do
+		local IFS="$_IFS"
+		set -- "$@" "$m"
+		unset IFS
+	done
 
 	if [ "$RC_UNAME" = Linux ]; then
 		fsck_opts="$fsck_opts -C0 -T"
-		if [ -z "$fsck_passno" ]; then
+		if [ -z "$fsck_passno" -a -z "$fsck_mnt" ]; then
 			fsck_args=${fsck_args--A -p}
 			if echo 2>/dev/null >/.test.$$; then
 				rm -f /.test.$$