terminal_test.go

     1  // Copyright 2016 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  //go:build linux
     6  // +build linux
     7  
     8  // This test is run by src/cmd/dist/test.go (cmd_go_test_terminal),
     9  // and not by cmd/go's tests. This is because this test requires
    10  // that it be called with its stdout and stderr being a terminal.
    11  // dist doesn't run `cmd/go test` against this test directory if
    12  // dist's stdout/stderr aren't terminals.
    13  //
    14  // See issue 18153.
    15  
    16  package p
    17  
    18  import (
    19  	"syscall"
    20  	"testing"
    21  	"unsafe"
    22  )
    23  
    24  const ioctlReadTermios = syscall.TCGETS
    25  
    26  // isTerminal reports whether fd is a terminal.
    27  func isTerminal(fd uintptr) bool {
    28  	var termios syscall.Termios
    29  	_, _, err := syscall.Syscall6(syscall.SYS_IOCTL, fd, ioctlReadTermios, uintptr(unsafe.Pointer(&termios)), 0, 0, 0)
    30  	return err == 0
    31  }
    32  
    33  func TestIsTerminal(t *testing.T) {
    34  	if !isTerminal(1) {
    35  		t.Errorf("stdout is not a terminal")
    36  	}
    37  	if !isTerminal(2) {
    38  		t.Errorf("stderr is not a terminal")
    39  	}
    40  }
    41
View as plain text