// Create a new FileSystem from a given file on the filesystem
func OpenFileSystemFile(filename string) (*FileSystem, *Process, error) {
dev, err := device.NewFileDevice(filename, binary.LittleEndian)
if err != nil {
return nil, nil, err
}
return NewFileSystem(dev)
}
// Test that unmounting restores the file system to normal
func TestUnmount(test *testing.T) {
fs, proc := OpenMinixImage(test)
// Create a secondary device to mount
imageFilename := getExtraFilename("minix3root.img")
dev, err := device.NewFileDevice(imageFilename, binary.LittleEndian)
if err != nil {
FatalHere(test, "Failed when creating new device: %s", err)
}
// Mount it on /mnt, so that is a mirror of the root filesystem
err = fs.Mount(proc, dev, "/mnt")
if err != nil {
FatalHere(test, "Failed when mounting: %s", err)
}
err = fs.Unmount(proc, "/mnt")
if err != nil {
FatalHere(test, "Failed when unmounting: %s", err)
}
// Now check to make sure that things have been returned to normal
rip, err := fs.eatPath(proc, "/mnt")
if err != nil {
FatalHere(test, "Could not fetch path /mnt: %s", err)
}
if rip.Inum != 518 {
FatalHere(test, "Data mismatch for inum got %d, expected %d", rip.Inum, 518)
}
if rip.Nlinks != 2 {
FatalHere(test, "Data mismatch for links got %d, expected %d", rip.Nlinks, 2)
}
if rip.Size != 128 {
FatalHere(test, "Data mismatch for size got %d, expected %d", rip.Size, 128)
}
fs.itable.PutInode(rip)
err = fs.Shutdown()
if err != nil {
FatalHere(test, "Failed when shutting down filesystem: %s", err)
}
}
// Test that mounting a device (on /mnt) functions properly
func TestMount(test *testing.T) {
fs, proc := OpenMinixImage(test)
// Create a secondary device to mount
imageFilename := getExtraFilename("minix3root.img")
dev, err := device.NewFileDevice(imageFilename, binary.LittleEndian)
if err != nil {
FatalHere(test, "Failed when creating new device: %s", err)
}
// Mount it on /mnt, so that is a mirror of the root filesystem
err = fs.Mount(proc, dev, "/mnt")
if err != nil {
FatalHere(test, "Failed when mounting: %s", err)
}
rip, err := fs.eatPath(proc, "/mnt/sample/europarl-en.txt")
if err != nil {
FatalHere(test, "Failed fetching inode: %s", err)
}
if rip.Inum != 542 {
FatalHere(test, "Data mismatch for inum got %d, expected %d", rip.Inum, 542)
}
if rip.Nlinks != 1 {
FatalHere(test, "Data mismatch for links got %d, expected %d", rip.Nlinks, 1)
}
if rip.Size != 4489799 {
FatalHere(test, "Data mismatch for size got %d, expected %d", rip.Size, 4489799)
}
fs.itable.PutInode(rip)
err = fs.Shutdown()
if err != nil {
FatalHere(test, "Failed when shutting down filesystem: %s", err)
}
}