nio/fs/LinuxFileSystem.java

0N/A/*
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0N/A
0N/Apackage sun.nio.fs;
0N/A
0N/Aimport java.nio.file.*;
import java.io.IOException;
import java.util.*;
import static sun.nio.fs.LinuxNativeDispatcher.*;

/**
 * Linux implementation of FileSystem
 */

class LinuxFileSystem extends UnixFileSystem {
    LinuxFileSystem(UnixFileSystemProvider provider, String dir) {
        super(provider, dir);
    }

    @Override
    public WatchService newWatchService()
        throws IOException
    {
        // assume 2.6.13 or newer
        return new LinuxWatchService(this);
    }


    // lazy initialization of the list of supported attribute views
    private static class SupportedFileFileAttributeViewsHolder {
        static final Set<String> supportedFileAttributeViews =
            supportedFileAttributeViews();
        private static Set<String> supportedFileAttributeViews() {
            Set<String> result = new HashSet<>();
            result.addAll(standardFileAttributeViews());
            // additional Linux-specific views
            result.add("dos");
            result.add("user");
            return Collections.unmodifiableSet(result);
        }
    }

    @Override
    public Set<String> supportedFileAttributeViews() {
        return SupportedFileFileAttributeViewsHolder.supportedFileAttributeViews;
    }

    @Override
    void copyNonPosixAttributes(int ofd, int nfd) {
        LinuxUserDefinedFileAttributeView.copyExtendedAttributes(ofd, nfd);
    }

    /**
     * Returns object to iterate over the mount entries in the given fstab file.
     */
    Iterable<UnixMountEntry> getMountEntries(String fstab) {
        ArrayList<UnixMountEntry> entries = new ArrayList<>();
        try {
            long fp = setmntent(fstab.getBytes(), "r".getBytes());
            try {
                for (;;) {
                    UnixMountEntry entry = new UnixMountEntry();
                    int res = getmntent(fp, entry);
                    if (res < 0)
                        break;
                    entries.add(entry);
                }
            } finally {
                endmntent(fp);
            }

        } catch (UnixException x) {
            // nothing we can do
        }
        return entries;
    }

    /**
     * Returns object to iterate over the mount entries in /etc/mtab
     */
    @Override
    Iterable<UnixMountEntry> getMountEntries() {
        return getMountEntries("/etc/mtab");
    }


    @Override
    FileStore getFileStore(UnixMountEntry entry) throws IOException {
        return new LinuxFileStore(this, entry);
    }
}