Add support for shm-size.

Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>

Closes: #206
Approved by: TomSweeneyRedHat

vendor/github.com/prometheus/procfs/fs.go

@@ -1,46 +0,0 @@
-package procfs
-
-import (
-	"fmt"
-	"os"
-	"path"
-
-	"github.com/prometheus/procfs/xfs"
-)
-
-// 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...)...)
-}
-
-// XFSStats retrieves XFS filesystem runtime statistics.
-func (fs FS) XFSStats() (*xfs.Stats, error) {
-	f, err := os.Open(fs.Path("fs/xfs/stat"))
-	if err != nil {
-		return nil, err
-	}
-	defer f.Close()
-
-	return xfs.ParseStats(f)
-}