Add exported error constants for all error codes.

The error codes starting from 9 are defined internally and can be
returned by the server, but without exported error constants it's
impractical to match on and handle these errors.

This change adds Err constants and text error strings for these codes.

Author: theraphim

request-errors.go

@@ -6,15 +6,38 @@ type fxerr uint32
 // direct control of the errors being sent vs. letting the library work them
 // out from the standard os/io errors.
 const (
-	ErrSSHFxOk               = fxerr(sshFxOk)
-	ErrSSHFxEOF              = fxerr(sshFxEOF)
-	ErrSSHFxNoSuchFile       = fxerr(sshFxNoSuchFile)
-	ErrSSHFxPermissionDenied = fxerr(sshFxPermissionDenied)
-	ErrSSHFxFailure          = fxerr(sshFxFailure)
-	ErrSSHFxBadMessage       = fxerr(sshFxBadMessage)
-	ErrSSHFxNoConnection     = fxerr(sshFxNoConnection)
-	ErrSSHFxConnectionLost   = fxerr(sshFxConnectionLost)
-	ErrSSHFxOpUnsupported    = fxerr(sshFxOPUnsupported)
+	ErrSSHFxOk                      = fxerr(sshFxOk)
+	ErrSSHFxEOF                     = fxerr(sshFxEOF)
+	ErrSSHFxNoSuchFile              = fxerr(sshFxNoSuchFile)
+	ErrSSHFxPermissionDenied        = fxerr(sshFxPermissionDenied)
+	ErrSSHFxFailure                 = fxerr(sshFxFailure)
+	ErrSSHFxBadMessage              = fxerr(sshFxBadMessage)
+	ErrSSHFxNoConnection            = fxerr(sshFxNoConnection)
+	ErrSSHFxConnectionLost          = fxerr(sshFxConnectionLost)
+	ErrSSHFxOpUnsupported           = fxerr(sshFxOPUnsupported)
+	ErrSSHFxInvalidHandle           = fxerr(sshFxInvalidHandle)
+	ErrSSHFxNoSuchPath              = fxerr(sshFxNoSuchPath)
+	ErrSSHFxFileAlreadyExists       = fxerr(sshFxFileAlreadyExists)
+	ErrSSHFxWriteProtect            = fxerr(sshFxWriteProtect)
+	ErrSSHFxNoMedia                 = fxerr(sshFxNoMedia)
+	ErrSSHFxNoSpaceOnFilesystem     = fxerr(sshFxNoSpaceOnFilesystem)
+	ErrSSHFxQuotaExceeded           = fxerr(sshFxQuotaExceeded)
+	ErrSSHFxUnknownPrincipal        = fxerr(sshFxUnknownPrincipal)
+	ErrSSHFxLockConflict            = fxerr(sshFxLockConflict)
+	ErrSSHFxDirNotEmpty             = fxerr(sshFxDirNotEmpty)
+	ErrSSHFxNotADirectory           = fxerr(sshFxNotADirectory)
+	ErrSSHFxInvalidFilename         = fxerr(sshFxInvalidFilename)
+	ErrSSHFxLinkLoop                = fxerr(sshFxLinkLoop)
+	ErrSSHFxCannotDelete            = fxerr(sshFxCannotDelete)
+	ErrSSHFxInvalidParameter        = fxerr(sshFxInvalidParameter)
+	ErrSSHFxFileIsADirectory        = fxerr(sshFxFileIsADirectory)
+	ErrSSHFxByteRangeLockConflict   = fxerr(sshFxByteRangeLockConflict)
+	ErrSSHFxByteRangeLockRefused    = fxerr(sshFxByteRangeLockRefused)
+	ErrSSHFxDeletePending           = fxerr(sshFxDeletePending)
+	ErrSSHFxFileCorrupt             = fxerr(sshFxFileCorrupt)
+	ErrSSHFxOwnerInvalid            = fxerr(sshFxOwnerInvalid)
+	ErrSSHFxGroupInvalid            = fxerr(sshFxGroupInvalid)
+	ErrSSHFxNoMatchingByteRangeLock = fxerr(sshFxNoMatchingByteRangeLock)
 )
 
 // Deprecated error types, these are aliases for the new ones, please use the new ones directly
@@ -48,6 +71,52 @@ func (e fxerr) Error() string {
 		return "connection lost"
 	case ErrSSHFxOpUnsupported:
 		return "operation unsupported"
+	case ErrSSHFxInvalidHandle:
+		return "the handle value was invalid"
+	case ErrSSHFxNoSuchPath:
+		return "the file path does not exist or is invalid"
+	case ErrSSHFxFileAlreadyExists:
+		return "the file already exists"
+	case ErrSSHFxWriteProtect:
+		return "the file is on read-only media, or the media is write protected"
+	case ErrSSHFxNoMedia:
+		return "the requested operation cannot be completed because there is no media available in the drive"
+	case ErrSSHFxNoSpaceOnFilesystem:
+		return "the requested operation cannot be completed because there is insufficient free space on the filesystem"
+	case ErrSSHFxQuotaExceeded:
+		return "the operation cannot be completed because it would exceed the user's storage quota"
+	case ErrSSHFxUnknownPrincipal:
+		return "a principal referenced by the request (either the 'owner', 'group', or 'who' field of an ACL), was unknown"
+	case ErrSSHFxLockConflict:
+		return "the file could not be opened because it is locked by another process"
+	case ErrSSHFxDirNotEmpty:
+		return "the directory is not empty"
+	case ErrSSHFxNotADirectory:
+		return "the specified file is not a directory"
+	case ErrSSHFxInvalidFilename:
+		return "the filename is not valid"
+	case ErrSSHFxLinkLoop:
+		return "too many symbolic links encountered or, an SSH_FXF_NOFOLLOW open encountered a symbolic link as the final component"
+	case ErrSSHFxCannotDelete:
+		return "the file cannot be deleted"
+	case ErrSSHFxInvalidParameter:
+		return "one of the parameters was out of range, or the parameters specified cannot be used together"
+	case ErrSSHFxFileIsADirectory:
+		return "the specified file was a directory in a context where a directory cannot be used"
+	case ErrSSHFxByteRangeLockConflict:
+		return "a read or write operation failed because another process's mandatory byte-range lock overlaps with the request"
+	case ErrSSHFxByteRangeLockRefused:
+		return "a request for a byte range lock was refused"
+	case ErrSSHFxDeletePending:
+		return "an operation was attempted on a file for which a delete operation is pending"
+	case ErrSSHFxFileCorrupt:
+		return "the file is corrupt; an filesystem integrity check should be run"
+	case ErrSSHFxOwnerInvalid:
+		return "the principal specified can not be assigned as an owner of a file"
+	case ErrSSHFxGroupInvalid:
+		return "the principal specified can not be assigned as the primary group of a file"
+	case ErrSSHFxNoMatchingByteRangeLock:
+		return "the requested operation could not be completed because the specified byte range lock has not been granted"
 	default:
 		return "failure"
 	}