43 lines
1.2 KiB
Go
43 lines
1.2 KiB
Go
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//go:build linux
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package main
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import (
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"os"
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"syscall"
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"unsafe"
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)
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func termWidth() int {
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var ws struct{ Row, Col, Xpixel, Ypixel uint16 }
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_, _, e := syscall.Syscall(syscall.SYS_IOCTL, uintptr(os.Stdin.Fd()), syscall.TIOCGWINSZ, uintptr(unsafe.Pointer(&ws)))
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if e != 0 || ws.Col == 0 {
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return 80
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}
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return int(ws.Col)
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}
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func isTerminal(fd int) bool {
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var t syscall.Termios
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_, _, e := syscall.Syscall(syscall.SYS_IOCTL, uintptr(fd), syscall.TCGETS, uintptr(unsafe.Pointer(&t)))
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return e == 0
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}
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func makeRaw(fd int) (func(), error) {
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var old syscall.Termios
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if _, _, e := syscall.Syscall(syscall.SYS_IOCTL, uintptr(fd), syscall.TCGETS, uintptr(unsafe.Pointer(&old))); e != 0 {
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return nil, e
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}
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raw := old
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raw.Iflag &^= syscall.ICRNL | syscall.IXON | syscall.BRKINT | syscall.INPCK | syscall.ISTRIP
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raw.Oflag &^= syscall.OPOST
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raw.Lflag &^= syscall.ECHO | syscall.ICANON | syscall.ISIG | syscall.IEXTEN
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raw.Cflag |= syscall.CS8
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if _, _, e := syscall.Syscall(syscall.SYS_IOCTL, uintptr(fd), syscall.TCSETS, uintptr(unsafe.Pointer(&raw))); e != 0 {
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return nil, e
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}
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return func() {
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syscall.Syscall(syscall.SYS_IOCTL, uintptr(fd), syscall.TCSETS, uintptr(unsafe.Pointer(&old)))
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}, nil
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}
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