29 import java.util.EnumSet;
30 import java.security.SecureRandom;
31 import java.io.IOException;
32 import java.nio.file.attribute.FileAttribute;
33 import java.nio.file.attribute.PosixFilePermission;
34 import java.nio.file.attribute.PosixFilePermissions;
35 import static java.nio.file.attribute.PosixFilePermission.*;
36 import sun.security.action.GetPropertyAction;
37
38
39 /**
40 * Helper class to support creation of temporary files and directories with
41 * initial attributes.
42 */
43
44 class TempFileHelper {
45 private TempFileHelper() { }
46
47 // temporary directory location
48 private static final Path tmpdir =
49 Paths.get(GetPropertyAction.privilegedGetProperty("java.io.tmpdir"));
50
51 private static final boolean isPosix =
52 FileSystems.getDefault().supportedFileAttributeViews().contains("posix");
53
54 // file name generation, same as java.io.File for now
55 private static final SecureRandom random = new SecureRandom();
56 private static Path generatePath(String prefix, String suffix, Path dir) {
57 long n = random.nextLong();
58 String s = prefix + Long.toUnsignedString(n) + suffix;
59 Path name = dir.getFileSystem().getPath(s);
60 // the generated name should be a simple file name
61 if (name.getParent() != null)
62 throw new IllegalArgumentException("Invalid prefix or suffix");
63 return dir.resolve(name);
64 }
65
66 // default file and directory permissions (lazily initialized)
67 private static class PosixPermissions {
68 static final FileAttribute<Set<PosixFilePermission>> filePermissions =
69 PosixFilePermissions.asFileAttribute(EnumSet.of(OWNER_READ, OWNER_WRITE));
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29 import java.util.EnumSet;
30 import java.security.SecureRandom;
31 import java.io.IOException;
32 import java.nio.file.attribute.FileAttribute;
33 import java.nio.file.attribute.PosixFilePermission;
34 import java.nio.file.attribute.PosixFilePermissions;
35 import static java.nio.file.attribute.PosixFilePermission.*;
36 import sun.security.action.GetPropertyAction;
37
38
39 /**
40 * Helper class to support creation of temporary files and directories with
41 * initial attributes.
42 */
43
44 class TempFileHelper {
45 private TempFileHelper() { }
46
47 // temporary directory location
48 private static final Path tmpdir =
49 Path.get(GetPropertyAction.privilegedGetProperty("java.io.tmpdir"));
50
51 private static final boolean isPosix =
52 FileSystems.getDefault().supportedFileAttributeViews().contains("posix");
53
54 // file name generation, same as java.io.File for now
55 private static final SecureRandom random = new SecureRandom();
56 private static Path generatePath(String prefix, String suffix, Path dir) {
57 long n = random.nextLong();
58 String s = prefix + Long.toUnsignedString(n) + suffix;
59 Path name = dir.getFileSystem().getPath(s);
60 // the generated name should be a simple file name
61 if (name.getParent() != null)
62 throw new IllegalArgumentException("Invalid prefix or suffix");
63 return dir.resolve(name);
64 }
65
66 // default file and directory permissions (lazily initialized)
67 private static class PosixPermissions {
68 static final FileAttribute<Set<PosixFilePermission>> filePermissions =
69 PosixFilePermissions.asFileAttribute(EnumSet.of(OWNER_READ, OWNER_WRITE));
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