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35 lines
977 B
Go
35 lines
977 B
Go
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// +build !windows
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package termstatus
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import (
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"io"
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"syscall"
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"unsafe"
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isatty "github.com/mattn/go-isatty"
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)
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// clearLines will clear the current line and the n lines above. Afterwards the
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// cursor is positioned at the start of the first cleared line.
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func clearLines(wr io.Writer, fd uintptr) clearLinesFunc {
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return posixClearLines
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}
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// canUpdateStatus returns true if status lines can be printed, the process
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// output is not redirected to a file or pipe.
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func canUpdateStatus(fd uintptr) bool {
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return isatty.IsTerminal(fd)
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}
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// getTermSize returns the dimensions of the given terminal.
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// the code is taken from "golang.org/x/crypto/ssh/terminal"
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func getTermSize(fd uintptr) (width, height int, err error) {
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var dimensions [4]uint16
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if _, _, err := syscall.Syscall6(syscall.SYS_IOCTL, fd, uintptr(syscall.TIOCGWINSZ), uintptr(unsafe.Pointer(&dimensions)), 0, 0, 0); err != 0 {
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return -1, -1, err
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}
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return int(dimensions[1]), int(dimensions[0]), nil
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}
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