| package pty |
| |
| import ( |
| "os" |
| "syscall" |
| "unsafe" |
| ) |
| |
| // Getsize returns the number of rows (lines) and cols (positions |
| // in each line) in terminal t. |
| func Getsize(t *os.File) (rows, cols int, err error) { |
| var ws winsize |
| err = windowrect(&ws, t.Fd()) |
| return int(ws.ws_row), int(ws.ws_col), err |
| } |
| |
| type winsize struct { |
| ws_row uint16 |
| ws_col uint16 |
| ws_xpixel uint16 |
| ws_ypixel uint16 |
| } |
| |
| func windowrect(ws *winsize, fd uintptr) error { |
| _, _, errno := syscall.Syscall( |
| syscall.SYS_IOCTL, |
| fd, |
| syscall.TIOCGWINSZ, |
| uintptr(unsafe.Pointer(ws)), |
| ) |
| if errno != 0 { |
| return syscall.Errno(errno) |
| } |
| return nil |
| } |
