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init: fake supporting hard links slightly differently

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Instead, make a hard link a symlink. This isn't much better, but it allows
some cases (e.g. installing GCC on moby via alpine) to work.

Signed-off-by: Tycho Andersen <tycho@docker.com>
This commit is contained in:
Tycho Andersen 2017-03-29 21:37:15 -06:00
parent 317e48b9dd
commit 3c5040b0f6
1 changed files with 6 additions and 5 deletions
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11
src/initrd/initrd.go
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@ -19,15 +19,16 @@ type Writer struct {
cw *cpio.Writer
}
func typeconv(t byte) int64 {
switch t {
func typeconv(thdr *tar.Header) int64 {
switch thdr.Typeflag {
case tar.TypeReg:
return cpio.TYPE_REG
case tar.TypeRegA:
return cpio.TYPE_REG
// Currently hard links not supported
// Currently hard links not supported very well :)
case tar.TypeLink:
return cpio.TYPE_REG
thdr.Linkname = "/" + thdr.Linkname
return cpio.TYPE_SYMLINK
case tar.TypeSymlink:
return cpio.TYPE_SYMLINK
case tar.TypeChar:
@ -54,7 +55,7 @@ func CopyTar(w *Writer, r *tar.Reader) (written int64, err error) {
if err != nil {
return
}
tp := typeconv(thdr.Typeflag)
tp := typeconv(thdr)
if tp == -1 {
return written, errors.New("cannot convert tar file")
}