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package main
import (
"fmt"
"os"
"strconv"
"text/tabwriter"
"lukeshu.com/btrfs-tools/pkg/btrfs"
"lukeshu.com/btrfs-tools/pkg/btrfs/btrfsitem"
"lukeshu.com/btrfs-tools/pkg/btrfsmisc"
"lukeshu.com/btrfs-tools/pkg/util"
)
func main() {
if err := Main(os.Args[1:]...); err != nil {
fmt.Fprintf(os.Stderr, "%v: error: %v\n", os.Args[0], err)
os.Exit(1)
}
}
func Main(imgfilenames ...string) (err error) {
maybeSetErr := func(_err error) {
if _err != nil && err == nil {
err = _err
}
}
fs, err := btrfsmisc.Open(os.O_RDONLY, imgfilenames...)
if err != nil {
return err
}
defer func() {
maybeSetErr(fs.Close())
}()
var treeErrCnt int
var treeItemCnt map[btrfsitem.Type]int
btrfsmisc.WalkFS(fs, btrfsmisc.WalkFSHandler{
PreTree: func(name string, laddr btrfs.LogicalAddr) {
treeErrCnt = 0
treeItemCnt = make(map[btrfsitem.Type]int)
fmt.Printf("tree laddr=%v name=%q\n", laddr, name)
},
Err: func(_ error) {
treeErrCnt++
},
TreeWalkHandler: btrfs.TreeWalkHandler{
Item: func(_ btrfs.TreeWalkPath, item btrfs.Item) error {
typ := item.Head.Key.ItemType
treeItemCnt[typ] = treeItemCnt[typ] + 1
return nil
},
},
PostTree: func(name string, laddr btrfs.LogicalAddr) {
totalItems := 0
for _, cnt := range treeItemCnt {
totalItems += cnt
}
numWidth := len(strconv.Itoa(util.Max(treeErrCnt, totalItems)))
table := tabwriter.NewWriter(os.Stdout, 0, 8, 2, ' ', 0)
fmt.Fprintf(table, " errors\t% *s\n", numWidth, strconv.Itoa(treeErrCnt))
for _, typ := range util.SortedMapKeys(treeItemCnt) {
fmt.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))
table.Flush()
},
})
return nil
}
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