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// Package ctlsock is a Go library that can be used to query the
// gocryptfs control socket interface. This interface can be
// activated by passing `-ctlsock /tmp/my.sock` to gocryptfs on the
// command line.
// See gocryptfs-xray for a usage example.
package ctlsock
import (
"encoding/json"
"fmt"
"net"
"time"
)
func (r *ResponseStruct) Error() string {
return fmt.Sprintf("errno %d: %s", r.ErrNo, r.ErrText)
}
// CtlSock encapsulates a control socket
type CtlSock struct {
Conn net.Conn
}
// There was at least one user who hit the earlier 1 second timeout. Raise to 10
// seconds which ought to be enough for anyone.
const ctlsockTimeout = 10 * time.Second
// New opens the socket at `socketPath` and stores it in a `CtlSock` object.
func New(socketPath string) (*CtlSock, error) {
conn, err := net.DialTimeout("unix", socketPath, ctlsockTimeout)
if err != nil {
return nil, err
}
return &CtlSock{Conn: conn}, nil
}
// Query sends a request to the control socket returns the response.
func (c *CtlSock) Query(req *RequestStruct) (*ResponseStruct, error) {
c.Conn.SetDeadline(time.Now().Add(ctlsockTimeout))
msg, err := json.Marshal(req)
if err != nil {
return nil, err
}
_, err = c.Conn.Write(msg)
if err != nil {
return nil, err
}
buf := make([]byte, 5000)
n, err := c.Conn.Read(buf)
if err != nil {
return nil, err
}
buf = buf[:n]
var resp ResponseStruct
json.Unmarshal(buf, &resp)
if resp.ErrNo != 0 {
return nil, &resp
}
return &resp, nil
}
// Close closes the socket
func (c *CtlSock) Close() {
c.Conn.Close()
}
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