tree-wide: Audit for fmt.Fprint usage, in favor of textui

4 files changed, 108 insertions, 109 deletions

diff --git a/cmd/btrfs-rec/inspect_lstrees.go b/cmd/btrfs-rec/inspect_lstrees.go
index e0dc4e1..7f59eaa 100644
--- a/cmd/btrfs-rec/inspect_lstrees.go
+++ b/cmd/btrfs-rec/inspect_lstrees.go
@@ -6,7 +6,6 @@ package main
 
 import (
 	"encoding/json"
-	"fmt"
 	"os"
 	"strconv"
 	"text/tabwriter"
@@ -58,11 +57,11 @@ func init() {
 				numWidth := len(strconv.Itoa(slices.Max(treeErrCnt, totalItems)))
 
 				table := tabwriter.NewWriter(os.Stdout, 0, 8, 2, ' ', 0)
-				fmt.Fprintf(table, "        errors\t% *s\n", numWidth, strconv.Itoa(treeErrCnt))
+				textui.Fprintf(table, "        errors\t% *s\n", numWidth, strconv.Itoa(treeErrCnt))
 				for _, typ := range maps.SortedKeys(treeItemCnt) {
-					fmt.Fprintf(table, "        %v items\t% *s\n", typ, numWidth, strconv.Itoa(treeItemCnt[typ]))
+					textui.Fprintf(table, "        %v items\t% *s\n", typ, numWidth, strconv.Itoa(treeItemCnt[typ]))
 				}
-				fmt.Fprintf(table, "        total items\t% *s\n", numWidth, strconv.Itoa(totalItems))
+				textui.Fprintf(table, "        total items\t% *s\n", numWidth, strconv.Itoa(totalItems))
 				table.Flush()
 			}
 			visitedNodes := make(containers.Set[btrfsvol.LogicalAddr])
diff --git a/cmd/btrfs-rec/main.go b/cmd/btrfs-rec/main.go
index c808237..a221cb7 100644
--- a/cmd/btrfs-rec/main.go
+++ b/cmd/btrfs-rec/main.go
@@ -7,7 +7,6 @@ package main
 import (
 	"context"
 	"encoding/json"
-	"fmt"
 	"os"
 
 	"github.com/datawire/dlib/dgroup"
@@ -20,6 +19,7 @@ import (
 	"git.lukeshu.com/btrfs-progs-ng/lib/btrfs"
 	"git.lukeshu.com/btrfs-progs-ng/lib/btrfs/btrfsvol"
 	"git.lukeshu.com/btrfs-progs-ng/lib/btrfsprogs/btrfsutil"
+	"git.lukeshu.com/btrfs-progs-ng/lib/textui"
 )
 
 type logLevelFlag struct {
@@ -162,7 +162,7 @@ func main() {
 	}
 
 	if err := argparser.ExecuteContext(context.Background()); err != nil {
-		fmt.Fprintf(os.Stderr, "%v: error: %v\n", argparser.CommandPath(), err)
+		textui.Fprintf(os.Stderr, "%v: error: %v\n", argparser.CommandPath(), err)
 		os.Exit(1)
 	}
 }
diff --git a/lib/btrfsprogs/btrfsinspect/print_addrspace.go b/lib/btrfsprogs/btrfsinspect/print_addrspace.go
index cd90288..a8b992e 100644
--- a/lib/btrfsprogs/btrfsinspect/print_addrspace.go
+++ b/lib/btrfsprogs/btrfsinspect/print_addrspace.go
@@ -5,7 +5,6 @@
 package btrfsinspect
 
 import (
-	"fmt"
 	"io"
 	"sort"
 
@@ -21,19 +20,19 @@ func PrintLogicalSpace(out io.Writer, fs *btrfs.FS) {
 	for _, mapping := range mappings {
 		if mapping.LAddr > prevEnd {
 			size := mapping.LAddr.Sub(prevEnd)
-			fmt.Fprintf(out, "logical_hole laddr=%v size=%v\n", prevEnd, size)
+			textui.Fprintf(out, "logical_hole laddr=%v size=%v\n", prevEnd, size)
 			sumHole += size
 		}
 		if mapping.LAddr != prevBeg {
 			if !mapping.Flags.OK {
-				fmt.Fprintf(out, "chunk laddr=%v size=%v flags=(missing)\n",
+				textui.Fprintf(out, "chunk laddr=%v size=%v flags=(missing)\n",
 					mapping.LAddr, mapping.Size)
 			} else {
-				fmt.Fprintf(out, "chunk laddr=%v size=%v flags=%v\n",
+				textui.Fprintf(out, "chunk laddr=%v size=%v flags=%v\n",
 					mapping.LAddr, mapping.Size, mapping.Flags.Val)
 			}
 		}
-		fmt.Fprintf(out, "\tstripe dev_id=%v paddr=%v\n",
+		textui.Fprintf(out, "\tstripe dev_id=%v paddr=%v\n",
 			mapping.PAddr.Dev, mapping.PAddr.Addr)
 		sumChunk += mapping.Size
 		prevBeg = mapping.LAddr
@@ -60,10 +59,10 @@ func PrintPhysicalSpace(out io.Writer, fs *btrfs.FS) {
 		}
 		if mapping.PAddr.Addr > prevEnd {
 			size := mapping.PAddr.Addr.Sub(prevEnd)
-			fmt.Fprintf(out, "physical_hole paddr=%v size=%v\n", prevEnd, size)
+			textui.Fprintf(out, "physical_hole paddr=%v size=%v\n", prevEnd, size)
 			sumHole += size
 		}
-		fmt.Fprintf(out, "devext dev=%v paddr=%v size=%v laddr=%v\n",
+		textui.Fprintf(out, "devext dev=%v paddr=%v size=%v laddr=%v\n",
 			mapping.PAddr.Dev, mapping.PAddr.Addr, mapping.Size, mapping.LAddr)
 		sumExt += mapping.Size
 		prevEnd = mapping.PAddr.Addr.Add(mapping.Size)
diff --git a/lib/btrfsprogs/btrfsinspect/print_tree.go b/lib/btrfsprogs/btrfsinspect/print_tree.go
index 9e5a5d1..b882c6b 100644
--- a/lib/btrfsprogs/btrfsinspect/print_tree.go
+++ b/lib/btrfsprogs/btrfsinspect/print_tree.go
@@ -22,6 +22,7 @@ import (
 	"git.lukeshu.com/btrfs-progs-ng/lib/btrfs/btrfsvol"
 	"git.lukeshu.com/btrfs-progs-ng/lib/diskio"
 	"git.lukeshu.com/btrfs-progs-ng/lib/slices"
+	"git.lukeshu.com/btrfs-progs-ng/lib/textui"
 )
 
 func DumpTrees(ctx context.Context, out io.Writer, fs *btrfs.FS) {
@@ -32,19 +33,19 @@ func DumpTrees(ctx context.Context, out io.Writer, fs *btrfs.FS) {
 	}
 
 	if superblock.RootTree != 0 {
-		fmt.Fprintf(out, "root tree\n")
+		textui.Fprintf(out, "root tree\n")
 		printTree(ctx, out, fs, btrfsprim.ROOT_TREE_OBJECTID)
 	}
 	if superblock.ChunkTree != 0 {
-		fmt.Fprintf(out, "chunk tree\n")
+		textui.Fprintf(out, "chunk tree\n")
 		printTree(ctx, out, fs, btrfsprim.CHUNK_TREE_OBJECTID)
 	}
 	if superblock.LogTree != 0 {
-		fmt.Fprintf(out, "log root tree\n")
+		textui.Fprintf(out, "log root tree\n")
 		printTree(ctx, out, fs, btrfsprim.TREE_LOG_OBJECTID)
 	}
 	if superblock.BlockGroupRoot != 0 {
-		fmt.Fprintf(out, "block group tree\n")
+		textui.Fprintf(out, "block group tree\n")
 		printTree(ctx, out, fs, btrfsprim.BLOCK_GROUP_TREE_OBJECTID)
 	}
 	fs.TreeWalk(
@@ -81,15 +82,15 @@ func DumpTrees(ctx context.Context, out io.Writer, fs *btrfs.FS) {
 				if !ok {
 					treeName = "file"
 				}
-				fmt.Fprintf(out, "%v tree %v \n", treeName, fmtKey(item.Key))
+				textui.Fprintf(out, "%v tree %v \n", treeName, fmtKey(item.Key))
 				printTree(ctx, out, fs, item.Key.ObjectID)
 				return nil
 			},
 		},
 	)
-	fmt.Fprintf(out, "total bytes %v\n", superblock.TotalBytes)
-	fmt.Fprintf(out, "bytes used %v\n", superblock.BytesUsed)
-	fmt.Fprintf(out, "uuid %v\n", superblock.FSUUID)
+	textui.Fprintf(out, "total bytes %v\n", superblock.TotalBytes)
+	textui.Fprintf(out, "bytes used %v\n", superblock.BytesUsed)
+	textui.Fprintf(out, "uuid %v\n", superblock.FSUUID)
 }
 
 // printTree mimics btrfs-progs
@@ -104,7 +105,7 @@ func printTree(ctx context.Context, out io.Writer, fs *btrfs.FS, treeID btrfspri
 			return nil
 		},
 		PreKeyPointer: func(_ btrfstree.TreePath, item btrfstree.KeyPointer) error {
-			fmt.Fprintf(out, "\t%v block %v gen %v\n",
+			textui.Fprintf(out, "\t%v block %v gen %v\n",
 				fmtKey(item.Key),
 				item.BlockPtr,
 				item.Generation)
@@ -115,65 +116,65 @@ func printTree(ctx context.Context, out io.Writer, fs *btrfs.FS, treeID btrfspri
 			bs, _ := binstruct.Marshal(item.Body)
 			itemSize := uint32(len(bs))
 			itemOffset -= itemSize
-			fmt.Fprintf(out, "\titem %v %v itemoff %v itemsize %v\n",
+			textui.Fprintf(out, "\titem %v %v itemoff %v itemsize %v\n",
 				i,
 				fmtKey(item.Key),
 				itemOffset,
 				itemSize)
 			switch body := item.Body.(type) {
 			case btrfsitem.FreeSpaceHeader:
-				fmt.Fprintf(out, "\t\tlocation %v\n", fmtKey(body.Location))
-				fmt.Fprintf(out, "\t\tcache generation %v entries %v bitmaps %v\n",
+				textui.Fprintf(out, "\t\tlocation %v\n", fmtKey(body.Location))
+				textui.Fprintf(out, "\t\tcache generation %v entries %v bitmaps %v\n",
 					body.Generation, body.NumEntries, body.NumBitmaps)
 			case btrfsitem.Inode:
-				fmt.Fprintf(out, ""+
+				textui.Fprintf(out, ""+
 					"\t\tgeneration %v transid %v size %v nbytes %v\n"+
 					"\t\tblock group %v mode %o links %v uid %v gid %v rdev %v\n"+
 					"\t\tsequence %v flags %v\n",
 					body.Generation, body.TransID, body.Size, body.NumBytes,
 					body.BlockGroup, body.Mode, body.NLink, body.UID, body.GID, body.RDev,
 					body.Sequence, body.Flags)
-				fmt.Fprintf(out, "\t\tatime %v\n", fmtTime(body.ATime))
-				fmt.Fprintf(out, "\t\tctime %v\n", fmtTime(body.CTime))
-				fmt.Fprintf(out, "\t\tmtime %v\n", fmtTime(body.MTime))
-				fmt.Fprintf(out, "\t\totime %v\n", fmtTime(body.OTime))
+				textui.Fprintf(out, "\t\tatime %v\n", fmtTime(body.ATime))
+				textui.Fprintf(out, "\t\tctime %v\n", fmtTime(body.CTime))
+				textui.Fprintf(out, "\t\tmtime %v\n", fmtTime(body.MTime))
+				textui.Fprintf(out, "\t\totime %v\n", fmtTime(body.OTime))
 			case btrfsitem.InodeRefs:
 				for _, ref := range body {
-					fmt.Fprintf(out, "\t\tindex %v namelen %v name: %s\n",
+					textui.Fprintf(out, "\t\tindex %v namelen %v name: %s\n",
 						ref.Index, ref.NameLen, ref.Name)
 				}
 			//case btrfsitem.INODE_EXTREF_KEY:
 			//	// TODO
 			case btrfsitem.DirEntry:
-				fmt.Fprintf(out, "\t\tlocation %v type %v\n",
+				textui.Fprintf(out, "\t\tlocation %v type %v\n",
 					fmtKey(body.Location), body.Type)
-				fmt.Fprintf(out, "\t\ttransid %v data_len %v name_len %v\n",
+				textui.Fprintf(out, "\t\ttransid %v data_len %v name_len %v\n",
 					body.TransID, body.DataLen, body.NameLen)
-				fmt.Fprintf(out, "\t\tname: %s\n", body.Name)
+				textui.Fprintf(out, "\t\tname: %s\n", body.Name)
 				if len(body.Data) > 0 {
-					fmt.Fprintf(out, "\t\tdata %v\n", body.Data)
+					textui.Fprintf(out, "\t\tdata %v\n", body.Data)
 				}
 			//case btrfsitem.DIR_LOG_INDEX_KEY, btrfsitem.DIR_LOG_ITEM_KEY:
 			//	// TODO
 			case btrfsitem.Root:
-				fmt.Fprintf(out, "\t\tgeneration %v root_dirid %v bytenr %d byte_limit %v bytes_used %v\n",
+				textui.Fprintf(out, "\t\tgeneration %v root_dirid %v bytenr %d byte_limit %v bytes_used %v\n",
 					body.Generation, body.RootDirID, body.ByteNr, body.ByteLimit, body.BytesUsed)
-				fmt.Fprintf(out, "\t\tlast_snapshot %v flags %v refs %v\n",
+				textui.Fprintf(out, "\t\tlast_snapshot %v flags %v refs %v\n",
 					body.LastSnapshot, body.Flags, body.Refs)
-				fmt.Fprintf(out, "\t\tdrop_progress %v drop_level %v\n",
+				textui.Fprintf(out, "\t\tdrop_progress %v drop_level %v\n",
 					fmtKey(body.DropProgress), body.DropLevel)
-				fmt.Fprintf(out, "\t\tlevel %v generation_v2 %v\n",
+				textui.Fprintf(out, "\t\tlevel %v generation_v2 %v\n",
 					body.Level, body.GenerationV2)
 				if body.Generation == body.GenerationV2 {
-					fmt.Fprintf(out, "\t\tuuid %v\n", body.UUID)
-					fmt.Fprintf(out, "\t\tparent_uuid %v\n", body.ParentUUID)
-					fmt.Fprintf(out, "\t\treceived_uuid %v\n", body.ReceivedUUID)
-					fmt.Fprintf(out, "\t\tctransid %v otransid %v stransid %v rtransid %v\n",
+					textui.Fprintf(out, "\t\tuuid %v\n", body.UUID)
+					textui.Fprintf(out, "\t\tparent_uuid %v\n", body.ParentUUID)
+					textui.Fprintf(out, "\t\treceived_uuid %v\n", body.ReceivedUUID)
+					textui.Fprintf(out, "\t\tctransid %v otransid %v stransid %v rtransid %v\n",
 						body.CTransID, body.OTransID, body.STransID, body.RTransID)
-					fmt.Fprintf(out, "\t\tctime %v\n", fmtTime(body.CTime))
-					fmt.Fprintf(out, "\t\totime %v\n", fmtTime(body.OTime))
-					fmt.Fprintf(out, "\t\tstime %v\n", fmtTime(body.STime))
-					fmt.Fprintf(out, "\t\trtime %v\n", fmtTime(body.RTime))
+					textui.Fprintf(out, "\t\tctime %v\n", fmtTime(body.CTime))
+					textui.Fprintf(out, "\t\totime %v\n", fmtTime(body.OTime))
+					textui.Fprintf(out, "\t\tstime %v\n", fmtTime(body.STime))
+					textui.Fprintf(out, "\t\trtime %v\n", fmtTime(body.RTime))
 				}
 			case btrfsitem.RootRef:
 				var tag string
@@ -185,20 +186,20 @@ func printTree(ctx context.Context, out io.Writer, fs *btrfs.FS, treeID btrfspri
 				default:
 					tag = fmt.Sprintf("(error: unhandled RootRef item type: %v)", item.Key.ItemType)
 				}
-				fmt.Fprintf(out, "\t\troot %v key dirid %v sequence %v name %s\n",
+				textui.Fprintf(out, "\t\troot %v key dirid %v sequence %v name %s\n",
 					tag, body.DirID, body.Sequence, body.Name)
 			case btrfsitem.Extent:
-				fmt.Fprintf(out, "\t\trefs %v gen %v flags %v\n",
+				textui.Fprintf(out, "\t\trefs %v gen %v flags %v\n",
 					body.Head.Refs, body.Head.Generation, body.Head.Flags)
 				if body.Head.Flags.Has(btrfsitem.EXTENT_FLAG_TREE_BLOCK) {
-					fmt.Fprintf(out, "\t\ttree block %v level %v\n",
+					textui.Fprintf(out, "\t\ttree block %v level %v\n",
 						fmtKey(body.Info.Key), body.Info.Level)
 				}
 				printExtentInlineRefs(out, body.Refs)
 			case btrfsitem.Metadata:
-				fmt.Fprintf(out, "\t\trefs %v gen %v flags %v\n",
+				textui.Fprintf(out, "\t\trefs %v gen %v flags %v\n",
 					body.Head.Refs, body.Head.Generation, body.Head.Flags)
-				fmt.Fprintf(out, "\t\ttree block skinny level %v\n", item.Key.Offset)
+				textui.Fprintf(out, "\t\ttree block skinny level %v\n", item.Key.Offset)
 				printExtentInlineRefs(out, body.Refs)
 			//case btrfsitem.EXTENT_DATA_REF_KEY:
 			//	// TODO
@@ -206,72 +207,72 @@ func printTree(ctx context.Context, out io.Writer, fs *btrfs.FS, treeID btrfspri
 			//	// TODO
 			case btrfsitem.ExtentCSum:
 				start := btrfsvol.LogicalAddr(item.Key.Offset)
-				fmt.Fprintf(out, "\t\trange start %d end %d length %d",
+				textui.Fprintf(out, "\t\trange start %d end %d length %d",
 					start, start.Add(body.Size()), body.Size())
 				sumsPerLine := slices.Max(1, len(btrfssum.CSum{})/body.ChecksumSize/2)
 
 				i := 0
 				_ = body.Walk(ctx, func(pos btrfsvol.LogicalAddr, sum btrfssum.ShortSum) error {
 					if i%sumsPerLine == 0 {
-						fmt.Fprintf(out, "\n\t\t")
+						textui.Fprintf(out, "\n\t\t")
 					} else {
-						fmt.Fprintf(out, " ")
+						textui.Fprintf(out, " ")
 					}
-					fmt.Fprintf(out, "[%d] 0x%x", pos, sum)
+					textui.Fprintf(out, "[%d] 0x%x", pos, sum)
 					i++
 					return nil
 				})
-				fmt.Fprintf(out, "\n")
+				textui.Fprintf(out, "\n")
 			case btrfsitem.FileExtent:
-				fmt.Fprintf(out, "\t\tgeneration %v type %v\n",
+				textui.Fprintf(out, "\t\tgeneration %v type %v\n",
 					body.Generation, body.Type)
 				switch body.Type {
 				case btrfsitem.FILE_EXTENT_INLINE:
-					fmt.Fprintf(out, "\t\tinline extent data size %v ram_bytes %v compression %v\n",
+					textui.Fprintf(out, "\t\tinline extent data size %v ram_bytes %v compression %v\n",
 						len(body.BodyInline), body.RAMBytes, body.Compression)
 				case btrfsitem.FILE_EXTENT_PREALLOC:
-					fmt.Fprintf(out, "\t\tprealloc data disk byte %v nr %v\n",
+					textui.Fprintf(out, "\t\tprealloc data disk byte %v nr %v\n",
 						body.BodyExtent.DiskByteNr,
 						body.BodyExtent.DiskNumBytes)
-					fmt.Fprintf(out, "\t\tprealloc data offset %v nr %v\n",
+					textui.Fprintf(out, "\t\tprealloc data offset %v nr %v\n",
 						body.BodyExtent.Offset,
 						body.BodyExtent.NumBytes)
 				case btrfsitem.FILE_EXTENT_REG:
-					fmt.Fprintf(out, "\t\textent data disk byte %d nr %d\n",
+					textui.Fprintf(out, "\t\textent data disk byte %d nr %d\n",
 						body.BodyExtent.DiskByteNr,
 						body.BodyExtent.DiskNumBytes)
-					fmt.Fprintf(out, "\t\textent data offset %d nr %d ram %v\n",
+					textui.Fprintf(out, "\t\textent data offset %d nr %d ram %v\n",
 						body.BodyExtent.Offset,
 						body.BodyExtent.NumBytes,
 						body.RAMBytes)
-					fmt.Fprintf(out, "\t\textent compression %v\n",
+					textui.Fprintf(out, "\t\textent compression %v\n",
 						body.Compression)
 				default:
-					fmt.Fprintf(out, "\t\t(error) unknown file extent type %v", body.Type)
+					textui.Fprintf(out, "\t\t(error) unknown file extent type %v", body.Type)
 				}
 			case btrfsitem.BlockGroup:
-				fmt.Fprintf(out, "\t\tblock group used %v chunk_objectid %v flags %v\n",
+				textui.Fprintf(out, "\t\tblock group used %v chunk_objectid %v flags %v\n",
 					body.Used, body.ChunkObjectID, body.Flags)
 			case btrfsitem.FreeSpaceInfo:
-				fmt.Fprintf(out, "\t\tfree space info extent count %v flags %v\n",
+				textui.Fprintf(out, "\t\tfree space info extent count %v flags %v\n",
 					body.ExtentCount, body.Flags)
 			case btrfsitem.FreeSpaceBitmap:
-				fmt.Fprintf(out, "\t\tfree space bitmap\n")
+				textui.Fprintf(out, "\t\tfree space bitmap\n")
 			case btrfsitem.Chunk:
-				fmt.Fprintf(out, "\t\tlength %d owner %d stripe_len %v type %v\n",
+				textui.Fprintf(out, "\t\tlength %d owner %d stripe_len %v type %v\n",
 					body.Head.Size, body.Head.Owner, body.Head.StripeLen, body.Head.Type)
-				fmt.Fprintf(out, "\t\tio_align %v io_width %v sector_size %v\n",
+				textui.Fprintf(out, "\t\tio_align %v io_width %v sector_size %v\n",
 					body.Head.IOOptimalAlign, body.Head.IOOptimalWidth, body.Head.IOMinSize)
-				fmt.Fprintf(out, "\t\tnum_stripes %v sub_stripes %v\n",
+				textui.Fprintf(out, "\t\tnum_stripes %v sub_stripes %v\n",
 					body.Head.NumStripes, body.Head.SubStripes)
 				for i, stripe := range body.Stripes {
-					fmt.Fprintf(out, "\t\t\tstripe %v devid %d offset %d\n",
+					textui.Fprintf(out, "\t\t\tstripe %v devid %d offset %d\n",
 						i, stripe.DeviceID, stripe.Offset)
-					fmt.Fprintf(out, "\t\t\tdev_uuid %v\n",
+					textui.Fprintf(out, "\t\t\tdev_uuid %v\n",
 						stripe.DeviceUUID)
 				}
 			case btrfsitem.Dev:
-				fmt.Fprintf(out, ""+
+				textui.Fprintf(out, ""+
 					"\t\tdevid %d total_bytes %v bytes_used %v\n"+
 					"\t\tio_align %v io_width %v sector_size %v type %v\n"+
 					"\t\tgeneration %v start_offset %v dev_group %v\n"+
@@ -285,7 +286,7 @@ func printTree(ctx context.Context, out io.Writer, fs *btrfs.FS, treeID btrfspri
 					body.DevUUID,
 					body.FSUUID)
 			case btrfsitem.DevExtent:
-				fmt.Fprintf(out, ""+
+				textui.Fprintf(out, ""+
 					"\t\tdev extent chunk_tree %v\n"+
 					"\t\tchunk_objectid %v chunk_offset %d length %d\n"+
 					"\t\tchunk_tree_uuid %v\n",
@@ -298,49 +299,49 @@ func printTree(ctx context.Context, out io.Writer, fs *btrfs.FS, treeID btrfspri
 			//case btrfsitem.QGROUP_LIMIT_KEY:
 			//	// TODO
 			case btrfsitem.UUIDMap:
-				fmt.Fprintf(out, "\t\tsubvol_id %d\n", body.ObjID)
+				textui.Fprintf(out, "\t\tsubvol_id %d\n", body.ObjID)
 			//case btrfsitem.STRING_ITEM_KEY:
 			//	// TODO
 			case btrfsitem.DevStats:
-				fmt.Fprintf(out, "\t\tpersistent item objectid %v offset %v\n",
+				textui.Fprintf(out, "\t\tpersistent item objectid %v offset %v\n",
 					item.Key.ObjectID.Format(item.Key.ItemType), item.Key.Offset)
 				switch item.Key.ObjectID {
 				case btrfsprim.DEV_STATS_OBJECTID:
-					fmt.Fprintf(out, "\t\tdevice stats\n")
-					fmt.Fprintf(out, "\t\twrite_errs %v read_errs %v flush_errs %v corruption_errs %v generation %v\n",
+					textui.Fprintf(out, "\t\tdevice stats\n")
+					textui.Fprintf(out, "\t\twrite_errs %v read_errs %v flush_errs %v corruption_errs %v generation %v\n",
 						body.Values[btrfsitem.DEV_STAT_WRITE_ERRS],
 						body.Values[btrfsitem.DEV_STAT_READ_ERRS],
 						body.Values[btrfsitem.DEV_STAT_FLUSH_ERRS],
 						body.Values[btrfsitem.DEV_STAT_CORRUPTION_ERRS],
 						body.Values[btrfsitem.DEV_STAT_GENERATION_ERRS])
 				default:
-					fmt.Fprintf(out, "\t\tunknown persistent item objectid %v\n", item.Key.ObjectID)
+					textui.Fprintf(out, "\t\tunknown persistent item objectid %v\n", item.Key.ObjectID)
 				}
 			//case btrfsitem.TEMPORARY_ITEM_KEY:
 			//	// TODO
 			case btrfsitem.Empty:
 				switch item.Key.ItemType {
 				case btrfsitem.ORPHAN_ITEM_KEY: // 48
-					fmt.Fprintf(out, "\t\torphan item\n")
+					textui.Fprintf(out, "\t\torphan item\n")
 				case btrfsitem.TREE_BLOCK_REF_KEY: // 176
-					fmt.Fprintf(out, "\t\ttree block backref\n")
+					textui.Fprintf(out, "\t\ttree block backref\n")
 				case btrfsitem.SHARED_BLOCK_REF_KEY: // 182
-					fmt.Fprintf(out, "\t\tshared block backref\n")
+					textui.Fprintf(out, "\t\tshared block backref\n")
 				case btrfsitem.FREE_SPACE_EXTENT_KEY: // 199
-					fmt.Fprintf(out, "\t\tfree space extent\n")
+					textui.Fprintf(out, "\t\tfree space extent\n")
 				case btrfsitem.QGROUP_RELATION_KEY: // 246
 					// do nothing
 				//case btrfsitem.EXTENT_REF_V0_KEY:
-				//	fmt.Fprintf(out, "\t\textent ref v0 (deprecated)\n")
+				//	textui.Fprintf(out, "\t\textent ref v0 (deprecated)\n")
 				//case btrfsitem.CSUM_ITEM_KEY:
-				//	fmt.Fprintf(out, "\t\tcsum item\n")
+				//	textui.Fprintf(out, "\t\tcsum item\n")
 				default:
-					fmt.Fprintf(out, "\t\t(error) unhandled empty item type: %v\n", item.Key.ItemType)
+					textui.Fprintf(out, "\t\t(error) unhandled empty item type: %v\n", item.Key.ItemType)
 				}
 			case btrfsitem.Error:
-				fmt.Fprintf(out, "\t\t(error) error item: %v\n", body.Err)
+				textui.Fprintf(out, "\t\t(error) error item: %v\n", body.Err)
 			default:
-				fmt.Fprintf(out, "\t\t(error) unhandled item type: %T\n", body)
+				textui.Fprintf(out, "\t\t(error) unhandled item type: %T\n", body)
 			}
 			return nil
 		},
@@ -361,37 +362,37 @@ func printHeaderInfo(out io.Writer, node btrfstree.Node) {
 	var typename string
 	if node.Head.Level > 0 { // internal node
 		typename = "node"
-		fmt.Fprintf(out, "node %v level %v items %v free space %v",
+		textui.Fprintf(out, "node %v level %v items %v free space %v",
 			node.Head.Addr,
 			node.Head.Level,
 			node.Head.NumItems,
 			node.MaxItems()-node.Head.NumItems)
 	} else { // leaf node
 		typename = "leaf"
-		fmt.Fprintf(out, "leaf %d items %v free space %v",
+		textui.Fprintf(out, "leaf %d items %v free space %v",
 			node.Head.Addr,
 			node.Head.NumItems,
 			node.LeafFreeSpace())
 	}
-	fmt.Fprintf(out, " generation %v owner %v\n",
+	textui.Fprintf(out, " generation %v owner %v\n",
 		node.Head.Generation,
 		node.Head.Owner)
 
-	fmt.Fprintf(out, "%v %d flags %v backref revision %v\n",
+	textui.Fprintf(out, "%v %d flags %v backref revision %v\n",
 		typename,
 		node.Head.Addr,
 		node.Head.Flags,
 		node.Head.BackrefRev)
 
-	fmt.Fprintf(out, "checksum stored %v\n", node.Head.Checksum.Fmt(node.ChecksumType))
+	textui.Fprintf(out, "checksum stored %v\n", node.Head.Checksum.Fmt(node.ChecksumType))
 	if calcSum, err := node.CalculateChecksum(); err != nil {
-		fmt.Fprintf(out, "checksum calced %v\n", err)
+		textui.Fprintf(out, "checksum calced %v\n", err)
 	} else {
-		fmt.Fprintf(out, "checksum calced %v\n", calcSum.Fmt(node.ChecksumType))
+		textui.Fprintf(out, "checksum calced %v\n", calcSum.Fmt(node.ChecksumType))
 	}
 
-	fmt.Fprintf(out, "fs uuid %v\n", node.Head.MetadataUUID)
-	fmt.Fprintf(out, "chunk uuid %v\n", node.Head.ChunkTreeUUID)
+	textui.Fprintf(out, "fs uuid %v\n", node.Head.MetadataUUID)
+	textui.Fprintf(out, "chunk uuid %v\n", node.Head.ChunkTreeUUID)
 }
 
 // printExtentInlineRefs mimics part of btrfs-progs kernel-shared/print-tree.c:print_extent_item()
@@ -401,22 +402,22 @@ func printExtentInlineRefs(out io.Writer, refs []btrfsitem.ExtentInlineRef) {
 		case nil:
 			switch ref.Type {
 			case btrfsitem.TREE_BLOCK_REF_KEY:
-				fmt.Fprintf(out, "\t\ttree block backref root %v\n",
+				textui.Fprintf(out, "\t\ttree block backref root %v\n",
 					btrfsprim.ObjID(ref.Offset))
 			case btrfsitem.SHARED_BLOCK_REF_KEY:
-				fmt.Fprintf(out, "\t\tshared block backref parent %v\n",
+				textui.Fprintf(out, "\t\tshared block backref parent %v\n",
 					ref.Offset)
 			default:
-				fmt.Fprintf(out, "\t\t(error) unexpected empty sub-item type: %v\n", ref.Type)
+				textui.Fprintf(out, "\t\t(error) unexpected empty sub-item type: %v\n", ref.Type)
 			}
 		case btrfsitem.ExtentDataRef:
-			fmt.Fprintf(out, "\t\textent data backref root %v objectid %v offset %v count %v\n",
+			textui.Fprintf(out, "\t\textent data backref root %v objectid %v offset %v count %v\n",
 				subitem.Root, subitem.ObjectID, subitem.Offset, subitem.Count)
 		case btrfsitem.SharedDataRef:
-			fmt.Fprintf(out, "\t\tshared data backref parent %v count %v\n",
+			textui.Fprintf(out, "\t\tshared data backref parent %v count %v\n",
 				ref.Offset, subitem.Count)
 		default:
-			fmt.Fprintf(out, "\t\t(error) unexpected sub-item type: %T\n", subitem)
+			textui.Fprintf(out, "\t\t(error) unexpected sub-item type: %T\n", subitem)
 		}
 	}
 }
@@ -424,19 +425,19 @@ func printExtentInlineRefs(out io.Writer, refs []btrfsitem.ExtentInlineRef) {
 // mimics print-tree.c:btrfs_print_key()
 func fmtKey(key btrfsprim.Key) string {
 	var out strings.Builder
-	fmt.Fprintf(&out, "key (%v %v", key.ObjectID.Format(key.ItemType), key.ItemType)
+	textui.Fprintf(&out, "key (%v %v", key.ObjectID.Format(key.ItemType), key.ItemType)
 	switch key.ItemType {
 	case btrfsitem.QGROUP_RELATION_KEY: //TODO, btrfsitem.QGROUP_INFO_KEY, btrfsitem.QGROUP_LIMIT_KEY:
 		panic("not implemented")
 	case btrfsitem.UUID_SUBVOL_KEY, btrfsitem.UUID_RECEIVED_SUBVOL_KEY:
-		fmt.Fprintf(&out, " %#08x)", key.Offset)
+		textui.Fprintf(&out, " %#08x)", key.Offset)
 	case btrfsitem.ROOT_ITEM_KEY:
-		fmt.Fprintf(&out, " %v)", btrfsprim.ObjID(key.Offset))
+		textui.Fprintf(&out, " %v)", btrfsprim.ObjID(key.Offset))
 	default:
 		if key.Offset == math.MaxUint64 {
-			fmt.Fprintf(&out, " -1)")
+			textui.Fprintf(&out, " -1)")
 		} else {
-			fmt.Fprintf(&out, " %v)", key.Offset)
+			textui.Fprintf(&out, " %v)", key.Offset)
 		}
 	}
 	return out.String()