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diff kitten: Strip suid/sgid bits from extracted files

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This commit is contained in:
Kovid Goyal
2026-06-03 05:45:04 +05:30
parent cb0f05c4e4
commit e6e5524f67
2 changed files with 5 additions and 1 deletions
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2
kittens/diff/main.go
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@@ -88,7 +88,7 @@ func get_ssh_file(hostname, rpath string) (string, error) {
return "", fmt.Errorf("Failed to ssh into remote host %s to get file %s with error: %w", hostname, rpath, err)
}
tf := tar.NewReader(bytes.NewReader(stdout))
count, err := utils.ExtractAllFromTar(tf, tdir)
count, err := utils.ExtractAllFromTar(tf, tdir, utils.TarExtractOptions{DontPreserveSuidAndSgid: true})
if err != nil {
return "", fmt.Errorf("Failed to untar data from remote host %s to get file %s with error: %w", hostname, rpath, err)
}

4
tools/utils/tar.go
View File

@@ -18,6 +18,7 @@ var _ = fmt.Print
type TarExtractOptions struct {
DontPreservePermissions bool
DontPreserveSuidAndSgid bool
}
func volnamelen(path string) int {
@@ -189,6 +190,9 @@ func ExtractAllFromTar(tr *tar.Reader, dest_path string, optss ...TarExtractOpti
set_metadata := func(chmod func(mode fs.FileMode) error, hdr_mode int64) (err error) {
if !opts.DontPreservePermissions && chmod != nil {
perms := mode(hdr_mode)
if opts.DontPreserveSuidAndSgid {
perms = perms &^ (os.ModeSetuid | os.ModeSetgid)
}
if err = chmod(perms); err != nil {
return err
}