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21 lines
518 B
21 lines
518 B
//go:build linux || darwin || freebsd || netbsd || openbsd || dragonfly
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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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// termWidth returns the width of the terminal f, and false when f is not a
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// terminal: TIOCGWINSZ fails on anything else.
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func termWidth(f *os.File) (int, bool) {
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var ws struct{ rows, cols, x, y uint16 }
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_, _, errno := syscall.Syscall(syscall.SYS_IOCTL, f.Fd(), uintptr(syscall.TIOCGWINSZ), uintptr(unsafe.Pointer(&ws)))
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if errno != 0 {
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return 0, false
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}
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return int(ws.cols), true
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}
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