61646d77af
Signed-off-by: Alexander Morozov <lk4d4@docker.com> Upstream-commit: f2614f2107c838d014d31b806e3b8a9f1395cb2b Component: engine
36 lines
625 B
Go
36 lines
625 B
Go
package pty
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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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// Getsize returns the number of rows (lines) and cols (positions
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// in each line) in terminal t.
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func Getsize(t *os.File) (rows, cols int, err error) {
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var ws winsize
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err = windowrect(&ws, t.Fd())
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return int(ws.ws_row), int(ws.ws_col), err
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}
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type winsize struct {
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ws_row uint16
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ws_col uint16
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ws_xpixel uint16
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ws_ypixel uint16
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}
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func windowrect(ws *winsize, fd uintptr) error {
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_, _, errno := syscall.Syscall(
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syscall.SYS_IOCTL,
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fd,
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syscall.TIOCGWINSZ,
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uintptr(unsafe.Pointer(ws)),
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)
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if errno != 0 {
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return syscall.Errno(errno)
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}
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return nil
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}
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