mirror of https://github.com/docker/cli.git
34 lines
855 B
Go
34 lines
855 B
Go
package procfs
|
|
|
|
import (
|
|
"fmt"
|
|
"os"
|
|
"path"
|
|
)
|
|
|
|
// FS represents the pseudo-filesystem proc, which provides an interface to
|
|
// kernel data structures.
|
|
type FS string
|
|
|
|
// DefaultMountPoint is the common mount point of the proc filesystem.
|
|
const DefaultMountPoint = "/proc"
|
|
|
|
// NewFS returns a new FS mounted under the given mountPoint. It will error
|
|
// if the mount point can't be read.
|
|
func NewFS(mountPoint string) (FS, error) {
|
|
info, err := os.Stat(mountPoint)
|
|
if err != nil {
|
|
return "", fmt.Errorf("could not read %s: %s", mountPoint, err)
|
|
}
|
|
if !info.IsDir() {
|
|
return "", fmt.Errorf("mount point %s is not a directory", mountPoint)
|
|
}
|
|
|
|
return FS(mountPoint), nil
|
|
}
|
|
|
|
// Path returns the path of the given subsystem relative to the procfs root.
|
|
func (fs FS) Path(p ...string) string {
|
|
return path.Join(append([]string{string(fs)}, p...)...)
|
|
}
|