rclone/vfs/vfstest/write_unix.go
Nick Craig-Wood 4a382c09ec mount: run tests in a subprocess to fix deadlock - fixes #3259
Before this change we ran the tests and the mount in the same process.
This could cause deadlocks and often did, and made the mount tests
very unreliable.

This fixes the problem by running the mount in a seperate process and
commanding it via a pipe over stdin/stdout.
2022-06-16 16:48:09 +01:00

70 lines
1.5 KiB
Go

//go:build linux || darwin || freebsd
// +build linux darwin freebsd
package vfstest
import (
"runtime"
"testing"
"github.com/rclone/rclone/vfs/vfscommon"
"github.com/stretchr/testify/assert"
"golang.org/x/sys/unix"
)
// TestWriteFileDoubleClose tests double close on write
func TestWriteFileDoubleClose(t *testing.T) {
run.skipIfVFS(t)
run.skipIfNoFUSE(t)
if runtime.GOOS == "darwin" {
t.Skip("Skipping test on OSX")
}
out, err := osCreate(run.path("testdoubleclose"))
assert.NoError(t, err)
fd := out.Fd()
fd1, err := unix.Dup(int(fd))
assert.NoError(t, err)
fd2, err := unix.Dup(int(fd))
assert.NoError(t, err)
// close one of the dups - should produce no error
err = unix.Close(fd1)
assert.NoError(t, err)
// write to the file
buf := []byte("hello")
n, err := out.Write(buf)
assert.NoError(t, err)
assert.Equal(t, 5, n)
// close it
err = out.Close()
assert.NoError(t, err)
// write to the other dup
_, err = unix.Write(fd2, buf)
if run.vfsOpt.CacheMode < vfscommon.CacheModeWrites {
// produces an error if cache mode < writes
assert.Error(t, err, "input/output error")
} else {
// otherwise does not produce an error
assert.NoError(t, err)
}
// close the dup - should not produce an error
err = unix.Close(fd2)
assert.NoError(t, err)
run.waitForWriters()
run.rm(t, "testdoubleclose")
}
// writeTestDup performs the platform-specific implementation of the dup() unix
func writeTestDup(oldfd uintptr) (uintptr, error) {
newfd, err := unix.Dup(int(oldfd))
return uintptr(newfd), err
}