p4u1/docker-cli
0
0
Fork 0
Code Issues Pull Requests Actions 1 Packages Projects Releases Wiki Activity

image: Handle systems that don't support O_PATH when updating timestamp

Browse Source 
Older kernel can't handle O_PATH in open() so this will
fail on dirs and symlinks. For dirs wa can fallback to
the normal Utimes, but for symlinks there is not much to do
but ignore their timestamps.
Upstream-commit: ed658156133862b3f181c9d3061be24b91435095
Component: engine
This commit is contained in:
Alexander Larsson
2013-09-19 14:57:22 +02:00
committed by Victor Vieux
parent 63649a9435
commit fbdbec9ab5
1 changed files with 14 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

18
components/engine/image.go
View File

@ -336,11 +336,21 @@ func (image *Image) applyLayer(layer, target string) error {
O_PATH := 010000000 // Not in syscall yet
fd, err := syscall.Open(update.path, syscall.O_RDWR | O_PATH | syscall.O_NOFOLLOW, 0600)
if err != nil {
return err
if err == syscall.EISDIR || err == syscall.ELOOP {
// O_PATH not supported, use Utimes except on symlinks where Utimes doesn't work
if err != syscall.ELOOP {
err = syscall.Utimes(update.path, update.time)
if err != nil {
return err
}
}
} else {
if err != nil {
return err
}
syscall.Futimes(fd, update.time)
_ = syscall.Close(fd)
}
syscall.Futimes(fd, update.time)
_ = syscall.Close(fd)
}
return nil