func (p dir) Open(path string) (io.ReadWriteCloser, error) {
if path == "/" {
return nil, fmt.Errorf("I'm a directory!")
}
head, tail := split(path)
fs, ok := p.entries[head]
if !ok {
return nil, fmt.Errorf("Not found: %s", path)
}
return fs.Open(tail)
}
}
// We want sockets only.
if statT.Mode&syscall.S_IFMT != syscall.S_IFSOCK {
continue
}
if proc == nil {
proc = &Proc{
PID: uint(p.PID),
Name: p.Name,
}
}
res[statT.Ino] = proc
}
})
return res, nil
}
// readFile reads an arbitrary file into a buffer. It's a variable so it can
// be overwritten for benchmarks. That's bad practice and we should change it
// to be a dependency.
var readFile = func(filename string, buf *bytes.Buffer) (int64, error) {
f, err := fs.Open(filename)
if err != nil {
return -1, err
}
defer f.Close()
return buf.ReadFrom(f)
}