diff options
Diffstat (limited to 'vendor/golang.org/x/crypto/ssh/terminal/util.go')
-rw-r--r-- | vendor/golang.org/x/crypto/ssh/terminal/util.go | 51 |
1 files changed, 23 insertions, 28 deletions
diff --git a/vendor/golang.org/x/crypto/ssh/terminal/util.go b/vendor/golang.org/x/crypto/ssh/terminal/util.go index 598e3df77..e7404ff49 100644 --- a/vendor/golang.org/x/crypto/ssh/terminal/util.go +++ b/vendor/golang.org/x/crypto/ssh/terminal/util.go @@ -17,9 +17,10 @@ package terminal // import "golang.org/x/crypto/ssh/terminal" import ( - "io" "syscall" "unsafe" + + "golang.org/x/sys/unix" ) // State contains the state of a terminal. @@ -44,8 +45,15 @@ func MakeRaw(fd int) (*State, error) { } newState := oldState.termios - newState.Iflag &^= syscall.ISTRIP | syscall.INLCR | syscall.ICRNL | syscall.IGNCR | syscall.IXON | syscall.IXOFF - newState.Lflag &^= syscall.ECHO | syscall.ICANON | syscall.ISIG + // This attempts to replicate the behaviour documented for cfmakeraw in + // the termios(3) manpage. + newState.Iflag &^= syscall.IGNBRK | syscall.BRKINT | syscall.PARMRK | syscall.ISTRIP | syscall.INLCR | syscall.IGNCR | syscall.ICRNL | syscall.IXON + newState.Oflag &^= syscall.OPOST + newState.Lflag &^= syscall.ECHO | syscall.ECHONL | syscall.ICANON | syscall.ISIG | syscall.IEXTEN + newState.Cflag &^= syscall.CSIZE | syscall.PARENB + newState.Cflag |= syscall.CS8 + newState.Cc[unix.VMIN] = 1 + newState.Cc[unix.VTIME] = 0 if _, _, err := syscall.Syscall6(syscall.SYS_IOCTL, uintptr(fd), ioctlWriteTermios, uintptr(unsafe.Pointer(&newState)), 0, 0, 0); err != 0 { return nil, err } @@ -67,8 +75,10 @@ func GetState(fd int) (*State, error) { // Restore restores the terminal connected to the given file descriptor to a // previous state. func Restore(fd int, state *State) error { - _, _, err := syscall.Syscall6(syscall.SYS_IOCTL, uintptr(fd), ioctlWriteTermios, uintptr(unsafe.Pointer(&state.termios)), 0, 0, 0) - return err + if _, _, err := syscall.Syscall6(syscall.SYS_IOCTL, uintptr(fd), ioctlWriteTermios, uintptr(unsafe.Pointer(&state.termios)), 0, 0, 0); err != 0 { + return err + } + return nil } // GetSize returns the dimensions of the given terminal. @@ -81,6 +91,13 @@ func GetSize(fd int) (width, height int, err error) { return int(dimensions[1]), int(dimensions[0]), nil } +// passwordReader is an io.Reader that reads from a specific file descriptor. +type passwordReader int + +func (r passwordReader) Read(buf []byte) (int, error) { + return syscall.Read(int(r), buf) +} + // ReadPassword reads a line of input from a terminal without local echo. This // is commonly used for inputting passwords and other sensitive data. The slice // returned does not include the \n. @@ -102,27 +119,5 @@ func ReadPassword(fd int) ([]byte, error) { syscall.Syscall6(syscall.SYS_IOCTL, uintptr(fd), ioctlWriteTermios, uintptr(unsafe.Pointer(&oldState)), 0, 0, 0) }() - var buf [16]byte - var ret []byte - for { - n, err := syscall.Read(fd, buf[:]) - if err != nil { - return nil, err - } - if n == 0 { - if len(ret) == 0 { - return nil, io.EOF - } - break - } - if buf[n-1] == '\n' { - n-- - } - ret = append(ret, buf[:n]...) - if n < len(buf) { - break - } - } - - return ret, nil + return readPasswordLine(passwordReader(fd)) } |