42 lines
641 B
Go
42 lines
641 B
Go
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// +build darwin dragonfly freebsd linux,!appengine netbsd openbsd
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package wrappedreadline
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import (
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"syscall"
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"unsafe"
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)
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// getWidth impl for Unix
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func getWidth() int {
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w := getWidthFd(StdoutFd)
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if w < 0 {
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w = getWidthFd(StderrFd)
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}
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return w
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}
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type winsize struct {
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Row uint16
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Col uint16
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Xpixel uint16
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Ypixel uint16
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}
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// get width of the terminal
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func getWidthFd(stdoutFd int) int {
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ws := &winsize{}
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retCode, _, errno := syscall.Syscall(syscall.SYS_IOCTL,
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uintptr(stdoutFd),
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uintptr(syscall.TIOCGWINSZ),
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uintptr(unsafe.Pointer(ws)))
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if int(retCode) == -1 {
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_ = errno
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return -1
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}
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return int(ws.Col)
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}
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