1 4b33cdd0 2015-11-30 stephen.d package p9p
 2 4b33cdd0 2015-11-30 stephen.d 
 3 4b33cdd0 2015-11-30 stephen.d import (
 4 4b33cdd0 2015-11-30 stephen.d 	"errors"
 5 4b33cdd0 2015-11-30 stephen.d 	"fmt"
 6 4b33cdd0 2015-11-30 stephen.d )
 7 4b33cdd0 2015-11-30 stephen.d 
 8 4b33cdd0 2015-11-30 stephen.d // MessageRerror provides both a Go error type and message type.
 9 4b33cdd0 2015-11-30 stephen.d type MessageRerror struct {
10 4b33cdd0 2015-11-30 stephen.d 	Ename string
11 4b33cdd0 2015-11-30 stephen.d }
12 4b33cdd0 2015-11-30 stephen.d 
13 a0568195 2016-05-23 stevvooe // 9p wire errors returned by Session interface methods
14 4b33cdd0 2015-11-30 stephen.d var (
15 4b33cdd0 2015-11-30 stephen.d 	ErrBadattach    = new9pError("unknown specifier in attach")
16 4b33cdd0 2015-11-30 stephen.d 	ErrBadoffset    = new9pError("bad offset")
17 4b33cdd0 2015-11-30 stephen.d 	ErrBadcount     = new9pError("bad count")
18 4b33cdd0 2015-11-30 stephen.d 	ErrBotch        = new9pError("9P protocol botch")
19 4b33cdd0 2015-11-30 stephen.d 	ErrCreatenondir = new9pError("create in non-directory")
20 4b33cdd0 2015-11-30 stephen.d 	ErrDupfid       = new9pError("duplicate fid")
21 4b33cdd0 2015-11-30 stephen.d 	ErrDuptag       = new9pError("duplicate tag")
22 4b33cdd0 2015-11-30 stephen.d 	ErrIsdir        = new9pError("is a directory")
23 4b33cdd0 2015-11-30 stephen.d 	ErrNocreate     = new9pError("create prohibited")
24 4b33cdd0 2015-11-30 stephen.d 	ErrNomem        = new9pError("out of memory")
25 4b33cdd0 2015-11-30 stephen.d 	ErrNoremove     = new9pError("remove prohibited")
26 4b33cdd0 2015-11-30 stephen.d 	ErrNostat       = new9pError("stat prohibited")
27 4b33cdd0 2015-11-30 stephen.d 	ErrNotfound     = new9pError("file not found")
28 4b33cdd0 2015-11-30 stephen.d 	ErrNowrite      = new9pError("write prohibited")
29 4b33cdd0 2015-11-30 stephen.d 	ErrNowstat      = new9pError("wstat prohibited")
30 4b33cdd0 2015-11-30 stephen.d 	ErrPerm         = new9pError("permission denied")
31 4b33cdd0 2015-11-30 stephen.d 	ErrUnknownfid   = new9pError("unknown fid")
32 4b33cdd0 2015-11-30 stephen.d 	ErrBaddir       = new9pError("bad directory in wstat")
33 4b33cdd0 2015-11-30 stephen.d 	ErrWalknodir    = new9pError("walk in non-directory")
34 4b33cdd0 2015-11-30 stephen.d 
35 4b33cdd0 2015-11-30 stephen.d 	// extra errors not part of the normal protocol
36 a0568195 2016-05-23 stevvooe 
37 4b33cdd0 2015-11-30 stephen.d 	ErrTimeout       = new9pError("fcall timeout") // returned when timing out on the fcall
38 4b33cdd0 2015-11-30 stephen.d 	ErrUnknownTag    = new9pError("unknown tag")
39 4b33cdd0 2015-11-30 stephen.d 	ErrUnknownMsg    = new9pError("unknown message")    // returned when encountering unknown message type
40 4b33cdd0 2015-11-30 stephen.d 	ErrUnexpectedMsg = new9pError("unexpected message") // returned when an unexpected message is encountered
41 4b33cdd0 2015-11-30 stephen.d 	ErrWalkLimit     = new9pError("too many wnames in walk")
42 4b33cdd0 2015-11-30 stephen.d 	ErrClosed        = errors.New("closed")
43 4b33cdd0 2015-11-30 stephen.d )
44 4b33cdd0 2015-11-30 stephen.d 
45 4b33cdd0 2015-11-30 stephen.d // new9pError returns a new 9p error ready for the wire.
46 4b33cdd0 2015-11-30 stephen.d func new9pError(s string) error {
47 4b33cdd0 2015-11-30 stephen.d 	return MessageRerror{Ename: s}
48 4b33cdd0 2015-11-30 stephen.d }
49 4b33cdd0 2015-11-30 stephen.d 
50 a0568195 2016-05-23 stevvooe // Type ensures that 9p errors can be transparently used as a 9p message in an
51 a0568195 2016-05-23 stevvooe // Fcall.
52 4b33cdd0 2015-11-30 stephen.d func (MessageRerror) Type() FcallType {
53 4b33cdd0 2015-11-30 stephen.d 	return Rerror
54 4b33cdd0 2015-11-30 stephen.d }
55 4b33cdd0 2015-11-30 stephen.d 
56 4b33cdd0 2015-11-30 stephen.d func (e MessageRerror) Error() string {
57 4b33cdd0 2015-11-30 stephen.d 	return fmt.Sprintf("9p: %v", e.Ename)
58 4b33cdd0 2015-11-30 stephen.d }