56 lines
1.4 KiB
Go
56 lines
1.4 KiB
Go
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// +build solaris
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package password
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import (
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"fmt"
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"os"
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"syscall"
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"golang.org/x/sys/unix"
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)
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func read(f *os.File) (string, error) {
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fd := int(f.Fd())
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if !isTerminal(fd) {
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return "", fmt.Errorf("File descriptor %d is not a terminal", fd)
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}
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oldState, err := makeRaw(fd)
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if err != nil {
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return "", err
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}
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defer unix.IoctlSetTermios(fd, unix.TCSETS, oldState)
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return readline(f)
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}
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// isTerminal returns true if there is a terminal attached to the given
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// file descriptor.
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// Source: http://src.illumos.org/source/xref/illumos-gate/usr/src/lib/libbc/libc/gen/common/isatty.c
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func isTerminal(fd int) bool {
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var termio unix.Termio
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err := unix.IoctlSetTermio(fd, unix.TCGETA, &termio)
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return err == nil
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}
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// makeRaw puts the terminal connected to the given file descriptor into raw
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// mode and returns the previous state of the terminal so that it can be
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// restored.
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// Source: http://src.illumos.org/source/xref/illumos-gate/usr/src/lib/libast/common/uwin/getpass.c
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func makeRaw(fd int) (*unix.Termios, error) {
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oldTermiosPtr, err := unix.IoctlGetTermios(int(fd), unix.TCGETS)
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if err != nil {
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return nil, err
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}
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oldTermios := *oldTermiosPtr
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newTermios := oldTermios
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newTermios.Lflag &^= syscall.ECHO | syscall.ECHOE | syscall.ECHOK | syscall.ECHONL
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if err := unix.IoctlSetTermios(fd, unix.TCSETS, &newTermios); err != nil {
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return nil, err
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}
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return oldTermiosPtr, nil
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}
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