diff options
author | Dawid Dziurla <dawidd0811@gmail.com> | 2020-03-25 10:37:39 +0100 |
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committer | Jesse Duffield <jessedduffield@gmail.com> | 2020-03-25 21:26:15 +1100 |
commit | 8a06b6067ebe5b96a885c8d02b23d9d23fc8e132 (patch) | |
tree | 69534cbd4380ab151f607b4031fbfc54567b9aad /vendor/github.com/creack/pty/util.go | |
parent | 2dcc52abd066c968d007114f44c55ae8205ded5a (diff) |
go mod vendor
Diffstat (limited to 'vendor/github.com/creack/pty/util.go')
-rw-r--r-- | vendor/github.com/creack/pty/util.go | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/vendor/github.com/creack/pty/util.go b/vendor/github.com/creack/pty/util.go new file mode 100644 index 000000000..8fdde0bab --- /dev/null +++ b/vendor/github.com/creack/pty/util.go @@ -0,0 +1,64 @@ +// +build !windows,!solaris + +package pty + +import ( + "os" + "syscall" + "unsafe" +) + +// InheritSize applies the terminal size of pty to tty. This should be run +// in a signal handler for syscall.SIGWINCH to automatically resize the tty when +// the pty receives a window size change notification. +func InheritSize(pty, tty *os.File) error { + size, err := GetsizeFull(pty) + if err != nil { + return err + } + err = Setsize(tty, size) + if err != nil { + return err + } + return nil +} + +// Setsize resizes t to s. +func Setsize(t *os.File, ws *Winsize) error { + return windowRectCall(ws, t.Fd(), syscall.TIOCSWINSZ) +} + +// GetsizeFull returns the full terminal size description. +func GetsizeFull(t *os.File) (size *Winsize, err error) { + var ws Winsize + err = windowRectCall(&ws, t.Fd(), syscall.TIOCGWINSZ) + return &ws, err +} + +// 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) { + ws, err := GetsizeFull(t) + return int(ws.Rows), int(ws.Cols), err +} + +// Winsize describes the terminal size. +type Winsize struct { + Rows uint16 // ws_row: Number of rows (in cells) + Cols uint16 // ws_col: Number of columns (in cells) + X uint16 // ws_xpixel: Width in pixels + Y uint16 // ws_ypixel: Height in pixels +} + +func windowRectCall(ws *Winsize, fd, a2 uintptr) error { + _, _, errno := syscall.Syscall( + syscall.SYS_IOCTL, + fd, + a2, + uintptr(unsafe.Pointer(ws)), + ) + if errno != 0 { + return syscall.Errno(errno) + } + return nil +} |