shexec

package
v0.0.0-...-c6a8797 Latest Latest
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This package is not in the latest version of its module.

 Go to latest Published: Apr 30, 2024 License: Apache-2.0 Imports: 36 Imported by: 3

Documentation

Index

Constants

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const ClientCommandFmt = `` /* 221-byte string literal not displayed */
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const DefaultMaxPtySize = 1024 * 1024
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const FirstExtraFilesFdNum = 3
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const ForceDebugRcFile = false
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const ForceDebugReturnState = false
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const InstallCommandFmt = `` /* 350-byte string literal not displayed */
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const MaxFdNum = 1023
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const MaxMaxPtySize = 100 * 1024 * 1024
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const MaxRunDataSize = 1024 * 1024
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const MaxTermCols = 1024
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const MaxTermRows = 1024
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const MaxTotalRunDataSize = 10 * MaxRunDataSize
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const MinMaxPtySize = 16 * 1024
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const MinTermCols = 10
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const MinTermRows = 2
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const NotFoundVersion = "v0.0"
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const ReturnStateReadWaitTime = 2 * time.Second
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const RtnStateFdNum = 20
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const ShellVarName = "SHELL"
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const SigKillWaitTime = 2 * time.Second

Variables

This section is empty.

Functions

func AddRunData 

func AddRunData(pk *packet.RunPacketType, data string, dataType string) (int, error)

func DetectGoArch 

func DetectGoArch(uname string) (string, string, error)

func GetTerminalSize 

func GetTerminalSize() (int, int, error)

func GetWinsize 

func GetWinsize(p *packet.RunPacketType) *pty.Winsize

func HasDupStdin 

func HasDupStdin(fds []packet.RemoteFd) bool

func IgnoreSigPipe 

func IgnoreSigPipe()

in detached run mode, we don't want mshell to die from signals since we want mshell to persist even if the mshell --server is terminated

func MakeAndCopyStdinFifo 

func MakeAndCopyStdinFifo(dst *os.File, fifoName string) error

this will never return (unless there is an error creating/opening the file), as fifoFile will never EOF

func MakeClientCommandStr 

func MakeClientCommandStr() string

func MakeDetachedExecCmd 

func MakeDetachedExecCmd(pk *packet.RunPacketType, cmdTty *os.File) (*exec.Cmd, error)

func MakeEnv0 

func MakeEnv0(envMap map[string]string) []byte

func MakeInitPacket 

func MakeInitPacket() *packet.InitPacketType

func MakeInstallCommandStr 

func MakeInstallCommandStr() string

func MakeLocalExecCmd 

func MakeLocalExecCmd(cmdStr string, sapi shellapi.ShellApi) *exec.Cmd

func MakeMShellSingleCmd 

func MakeMShellSingleCmd() (*exec.Cmd, error)

func MakeRunnerExec 

func MakeRunnerExec(ck base.CommandKey) (*exec.Cmd, error)

func MakeServerInitPacket 

func MakeServerInitPacket() (*packet.InitPacketType, error)

func MakeSimpleStaticWriterPipe 

func MakeSimpleStaticWriterPipe(data []byte) (*os.File, error)

returns (pr, err)

func MaxFdNumInPacket 

func MaxFdNumInPacket(pk *packet.RunPacketType) int

func NextFreeFdNum 

func NextFreeFdNum(pk *packet.RunPacketType) (int, error)

func ParseEnv0 

func ParseEnv0(env []byte) map[string]string

func RunInstallFromCmd 

func RunInstallFromCmd(ctx context.Context, ecmd ConnInterface, tryDetect bool, mshellStream io.Reader, mshellReaderFn MShellBinaryReaderFn, msgFn func(string)) error

func SendRunPacketAndRunData 

func SendRunPacketAndRunData(ctx context.Context, sender *packet.PacketSender, runPacket *packet.RunPacketType) error

func SetupSignalsForDetach 

func SetupSignalsForDetach()

in detached run mode, we don't want mshell to die from signals since we want mshell to persist even if the mshell --server is terminated

func ValidateRemoteFds 

func ValidateRemoteFds(rfds []packet.RemoteFd) error

func ValidateRunPacket 

func ValidateRunPacket(pk *packet.RunPacketType) error

Types

type ClientOpts 

type ClientOpts struct {
	SSHOpts      SSHOpts
	Command      string
	Fds          []packet.RemoteFd
	Cwd          string
	Debug        bool
	Sudo         bool
	SudoWithPass bool
	SudoPw       string
	Detach       bool
	UsePty       bool
}

type ClientProc 

type ClientProc struct {
	Cmd          ConnInterface
	InitPk       *packet.InitPacketType
	StartTs      time.Time
	StdinWriter  io.WriteCloser
	StdoutReader io.ReadCloser
	StderrReader io.ReadCloser
	Input        *packet.PacketSender
	Output       *packet.PacketParser
}

func MakeClientProc 

func MakeClientProc(ctx context.Context, ecmd ConnInterface) (*ClientProc, error)

returns (clientproc, initpk, error)

func (*ClientProc) Close 

func (cproc *ClientProc) Close()

func (*ClientProc) ProxySingleOutput 

func (cproc *ClientProc) ProxySingleOutput(ck base.CommandKey, sender *packet.PacketSender, packetCallback func(packet.PacketType))

type CmdWrap 

type CmdWrap struct {
	Cmd *exec.Cmd
}

func (CmdWrap) Kill 

func (cw CmdWrap) Kill()

func (CmdWrap) Parser 

func (cw CmdWrap) Parser() (*packet.PacketParser, io.ReadCloser, io.ReadCloser, error)

func (CmdWrap) Sender 

func (cw CmdWrap) Sender() (*packet.PacketSender, io.WriteCloser, error)

func (CmdWrap) Start 

func (cw CmdWrap) Start() error

func (CmdWrap) StderrPipe 

func (cw CmdWrap) StderrPipe() (io.ReadCloser, error)

func (CmdWrap) StdinPipe 

func (cw CmdWrap) StdinPipe() (io.WriteCloser, error)

func (CmdWrap) StdoutPipe 

func (cw CmdWrap) StdoutPipe() (io.ReadCloser, error)

func (CmdWrap) Wait 

func (cw CmdWrap) Wait() error

type ConnInterface 

type ConnInterface interface {
	Kill()
	Wait() error
	Sender() (*packet.PacketSender, io.WriteCloser, error)
	Parser() (*packet.PacketParser, io.ReadCloser, io.ReadCloser, error)
	Start() error
	StdinPipe() (io.WriteCloser, error)
	StdoutPipe() (io.ReadCloser, error)
	StderrPipe() (io.ReadCloser, error)
}

type FdContext 

type FdContext interface {
	GetWriter(fdNum int) io.WriteCloser
	GetReader(fdNum int) io.ReadCloser
}

type InstallOpts 

type InstallOpts struct {
	SSHOpts SSHOpts
	ArchStr string
	OptName string
	Detect  bool
	CmdPty  *os.File
}

type InvalidPacketError 

type InvalidPacketError struct {
	InvalidPk *packet.PacketType
}

func (InvalidPacketError) Error 

func (ipe InvalidPacketError) Error() string

type MShellBinaryReaderFn 

type MShellBinaryReaderFn func(version string, goos string, goarch string) (io.ReadCloser, error)

type ReturnStateBuf 

type ReturnStateBuf struct {
	Lock     *sync.Mutex
	Buf      []byte
	Done     bool
	Err      error
	Reader   *os.File
	FdNum    int
	EndBytes []byte
	DoneCh   chan bool
}

func MakeReturnStateBuf 

func MakeReturnStateBuf() *ReturnStateBuf

func (*ReturnStateBuf) Run 

func (rs *ReturnStateBuf) Run()

TODO limit size of read state buffer

type SSHOpts 

type SSHOpts struct {
	SSHHost        string
	SSHOptsStr     string
	SSHIdentity    string
	SSHUser        string
	SSHPort        int
	SSHErrorsToTty bool
	BatchMode      bool
}

func (SSHOpts) MakeMShellSSHOpts 

func (opts SSHOpts) MakeMShellSSHOpts() string

func (SSHOpts) MakeSSHExecCmd 

func (opts SSHOpts) MakeSSHExecCmd(remoteCommand string, sapi shellapi.ShellApi) *exec.Cmd

type SessionWrap 

type SessionWrap struct {
	Session  *ssh.Session
	StartCmd string
}

func (SessionWrap) Kill 

func (sw SessionWrap) Kill()

func (SessionWrap) Parser 

func (sw SessionWrap) Parser() (*packet.PacketParser, io.ReadCloser, io.ReadCloser, error)

func (SessionWrap) Sender 

func (sw SessionWrap) Sender() (*packet.PacketSender, io.WriteCloser, error)

func (SessionWrap) Start 

func (sw SessionWrap) Start() error

func (SessionWrap) StderrPipe 

func (sw SessionWrap) StderrPipe() (io.ReadCloser, error)

func (SessionWrap) StdinPipe 

func (sw SessionWrap) StdinPipe() (io.WriteCloser, error)

func (SessionWrap) StdoutPipe 

func (sw SessionWrap) StdoutPipe() (io.ReadCloser, error)

func (SessionWrap) Wait 

func (sw SessionWrap) Wait() error

type ShExecType 

type ShExecType struct {
	Lock           *sync.Mutex // only locks "Exited" field
	StartTs        time.Time
	CK             base.CommandKey
	FileNames      *base.CommandFileNames
	Cmd            *exec.Cmd
	CmdPty         *os.File
	MaxPtySize     int64
	Multiplexer    *mpio.Multiplexer
	Detached       bool
	DetachedOutput *packet.PacketSender
	RunnerOutFd    *os.File
	MsgSender      *packet.PacketSender // where to send out-of-band messages back to calling proceess
	ReturnState    *ReturnStateBuf
	Exited         bool   // locked via Lock
	TmpRcFileName  string // file *or* directory holding temporary rc file(s)
	SAPI           shellapi.ShellApi
	ShellPrivKey   *ecdh.PrivateKey
	SudoWriter     *os.File
}

func MakeShExec 

func MakeShExec(ck base.CommandKey, upr packet.UnknownPacketReporter, sapi shellapi.ShellApi) *ShExecType

func RunCommandSimple 

func RunCommandSimple(pk *packet.RunPacketType, sender *packet.PacketSender, fromServer bool) (rtnShExec *ShExecType, rtnErr error)

func (*ShExecType) Close 

func (c *ShExecType) Close()

func (*ShExecType) IsExited 

func (c *ShExecType) IsExited() bool

func (*ShExecType) MakeCmdStartPacket 

func (c *ShExecType) MakeCmdStartPacket(reqId string) *packet.CmdStartPacketType

func (*ShExecType) ProcWait 

func (c *ShExecType) ProcWait() error

func (*ShExecType) RunRemoteIOAndWait 

func (cmd *ShExecType) RunRemoteIOAndWait(packetParser *packet.PacketParser, sender *packet.PacketSender)

func (*ShExecType) SendSignal 

func (s *ShExecType) SendSignal(sig syscall.Signal)

func (*ShExecType) WaitForCommand 

func (c *ShExecType) WaitForCommand() *packet.CmdDonePacketType

called in waveshell --single mode (returns the real cmddone packet)

type ShExecUPR 

type ShExecUPR struct {
	ShExec *ShExecType
	UPR    packet.UnknownPacketReporter
}

func (ShExecUPR) UnknownPacket 

func (s ShExecUPR) UnknownPacket(pk packet.PacketType)

type StdContext 

type StdContext struct{}

func (StdContext) GetReader 

func (StdContext) GetReader(fdNum int) io.ReadCloser

func (StdContext) GetWriter 

func (StdContext) GetWriter(fdNum int) io.WriteCloser

type WaveshellLaunchError 

type WaveshellLaunchError struct {
	InitPk *packet.InitPacketType
}

func (WaveshellLaunchError) Error 

func (wle WaveshellLaunchError) Error() string

Source Files

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