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Signed-off-by: Nobuhiro MIKI <[email protected]>
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Original file line number | Diff line number | Diff line change |
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@@ -1,5 +1,3 @@ | ||
module github.com/nmi/gokvm | ||
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go 1.13 | ||
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require golang.org/x/term v0.0.0-20201210144234-2321bbc49cbf |
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@@ -0,0 +1,66 @@ | ||
package term | ||
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import ( | ||
"syscall" | ||
"unsafe" | ||
) | ||
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type termios struct { | ||
Iflag uint32 | ||
Oflag uint32 | ||
Cflag uint32 | ||
Lflag uint32 | ||
Line uint8 | ||
Cc [19]uint8 | ||
Ispeed uint32 | ||
Ospeed uint32 | ||
} | ||
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func read(fd int) (termios, error) { | ||
var t termios | ||
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_, _, errno := syscall.Syscall( | ||
syscall.SYS_IOCTL, uintptr(fd), 0x5401, | ||
uintptr(unsafe.Pointer(&t))) | ||
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var err error = nil | ||
if errno != 0 { | ||
err = errno | ||
} | ||
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return t, err | ||
} | ||
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func write(fd int, t termios) error { | ||
_, _, errno := syscall.Syscall( | ||
syscall.SYS_IOCTL, uintptr(fd), 0x5402, | ||
uintptr(unsafe.Pointer(&t))) | ||
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var err error = nil | ||
if errno != 0 { | ||
err = errno | ||
} | ||
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return err | ||
} | ||
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func SetRawMode() (func(), error) { | ||
t, err := read(0) | ||
if err != nil { | ||
return func() {}, err | ||
} | ||
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oldTermios := t | ||
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t.Iflag &^= 0b10111101011 | ||
t.Oflag &^= 1 | ||
t.Lflag &^= 0b1000000001001011 | ||
t.Cflag &^= 0b01001000 | 0b100000000 | ||
t.Cflag |= 48 | ||
t.Cc[6] = 1 | ||
t.Cc[5] = 0 | ||
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return func() { | ||
_ = write(0, oldTermios) | ||
}, write(0, t) | ||
} |