debian-forge-composer/vendor/github.com/moby/sys/mountinfo/mounted_unix.go
Christian Kellner 986f076276 container: add support for uploading to registries
Add a new generic container registry client via a new `container`
package. Use this to create a command line utility as well as a
new upload target for container registries.

The code uses the github.com/containers/* project and packages to
interact with container registires that is also used by skopeo,
podman et al. One if the dependencies is `proglottis/gpgme` that
is using cgo to bind libgpgme, so we have to add the corresponding
devel package to the BuildRequires as well as installing it on CI.

Checks will follow later via an integration test.
2022-06-29 10:02:46 +02:00

53 lines
1.2 KiB
Go

//go:build linux || (freebsd && cgo) || (openbsd && cgo) || (darwin && cgo)
// +build linux freebsd,cgo openbsd,cgo darwin,cgo
package mountinfo
import (
"os"
"path/filepath"
"golang.org/x/sys/unix"
)
func mountedByStat(path string) (bool, error) {
var st unix.Stat_t
if err := unix.Lstat(path, &st); err != nil {
return false, &os.PathError{Op: "stat", Path: path, Err: err}
}
dev := st.Dev
parent := filepath.Dir(path)
if err := unix.Lstat(parent, &st); err != nil {
return false, &os.PathError{Op: "stat", Path: parent, Err: err}
}
if dev != st.Dev {
// Device differs from that of parent,
// so definitely a mount point.
return true, nil
}
// NB: this does not detect bind mounts on Linux.
return false, nil
}
func normalizePath(path string) (realPath string, err error) {
if realPath, err = filepath.Abs(path); err != nil {
return "", err
}
if realPath, err = filepath.EvalSymlinks(realPath); err != nil {
return "", err
}
if _, err := os.Stat(realPath); err != nil {
return "", err
}
return realPath, nil
}
func mountedByMountinfo(path string) (bool, error) {
entries, err := GetMounts(SingleEntryFilter(path))
if err != nil {
return false, err
}
return len(entries) > 0, nil
}