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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
}
func (fs FS) stat(p string) (os.FileInfo, error) {
return os.Stat(path.Join(string(fs), p))
}
func (fs FS) open(p string) (*os.File, error) {
return os.Open(path.Join(string(fs), p))
}
func (fs FS) readlink(p string) (string, error) {
return os.Readlink(path.Join(string(fs), p))
}
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