github.com/SagerNet/gvisor@v0.0.0-20210707092255-7731c139d75c/pkg/sentry/fs/host/inode_test.go (about)

     1  // Copyright 2018 The gVisor Authors.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package host
    16  
    17  import (
    18  	"testing"
    19  
    20  	"golang.org/x/sys/unix"
    21  	"github.com/SagerNet/gvisor/pkg/sentry/contexttest"
    22  )
    23  
    24  // TestCloseFD verifies fds will be closed.
    25  func TestCloseFD(t *testing.T) {
    26  	var p [2]int
    27  	if err := unix.Pipe(p[0:]); err != nil {
    28  		t.Fatalf("Failed to create pipe %v", err)
    29  	}
    30  	defer unix.Close(p[0])
    31  	defer unix.Close(p[1])
    32  
    33  	// Use the write-end because we will detect if it's closed on the read end.
    34  	ctx := contexttest.Context(t)
    35  	file, err := NewFile(ctx, p[1])
    36  	if err != nil {
    37  		t.Fatalf("Failed to create File: %v", err)
    38  	}
    39  	file.DecRef(ctx)
    40  
    41  	s := make([]byte, 10)
    42  	if c, err := unix.Read(p[0], s); c != 0 || err != nil {
    43  		t.Errorf("want 0, nil (EOF) from read end, got %v, %v", c, err)
    44  	}
    45  }