Java Utililty Methods Posix

List of utility methods to do Posix

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Description

The list of methods to do Posix are organized into topic(s).

Method

voidaddPermissions(Set permissions, String prefix, long mode)
add Permissions 
if ((mode & 1) == 1) {
    permissions.add(PosixFilePermission.valueOf(prefix + "_EXECUTE"));
if ((mode & 2) == 2) {
    permissions.add(PosixFilePermission.valueOf(prefix + "_WRITE"));
if ((mode & 4) == 4) {
    permissions.add(PosixFilePermission.valueOf(prefix + "_READ"));
...
StringfromPosixPermission(PosixFilePermission permission)
from Posix Permission 
switch (permission) {
case OWNER_READ:
case GROUP_READ:
case OTHERS_READ:
    return READ;
case OWNER_WRITE:
case GROUP_WRITE:
case OTHERS_WRITE:
...
intgetFileMode(Set posixPermissions)
Given a set of PosixFilePermissions, returns an integer with the corresponding permission bits set 
int fileMode = 0;
for (int i = 0; i < permissionBits.length; i++) {
    if (posixPermissions.contains(permissionBits[i])) {
        fileMode += 1 << i;
return fileMode;
PosixFileAttributesgetPosixFileAttributes(@Nonnull File file)
get Posix File Attributes 
return Files.readAttributes(file.toPath(), PosixFileAttributes.class, LinkOption.NOFOLLOW_LINKS);
SetgetPosixFilePermissions(int mode)
Convert integer mode to PosixFilePermission object. 
Set<PosixFilePermission> result = EnumSet.noneOf(PosixFilePermission.class);
if ((mode & 0400) != 0) {
    result.add(PosixFilePermission.OWNER_READ);
if ((mode & 0200) != 0) {
    result.add(PosixFilePermission.OWNER_WRITE);
if ((mode & 0100) != 0) {
...
SetgetPosixPermissions(File forFile)
get Posix Permissions 
if (IS_POSIX) {
    try {
        return Files.getPosixFilePermissions(Paths.get(forFile.toURI()));
    } catch (IOException e) {
        throw new RuntimeException(e);
return new TreeSet<PosixFilePermission>();
...
SetgetPosixPermissions(int fileMode)
Given an integer representing file permissions, returns a set of PosixFilePermissions representing the corresponding permissions. 
Set<PosixFilePermission> posixPermissions = new HashSet<>();
for (int i = 0; i < permissionBits.length; i++) {
    int bit = fileMode & (1 << i);
    if (bit != 0) {
        posixPermissions.add(permissionBits[i]);
return posixPermissions;
...
intgetPosixPermissionsAsInt(Set permissionSet)
get Posix Permissions As Int 
int result = 0;
if (permissionSet.contains(PosixFilePermission.OWNER_READ)) {
    result = result | O400;
if (permissionSet.contains(PosixFilePermission.OWNER_WRITE)) {
    result = result | O200;
if (permissionSet.contains(PosixFilePermission.OWNER_EXECUTE)) {
...
booleangivePerm(File f, Set perms)
Sets specified permissions to a single file or directory. 
try {
    Path p = Paths.get(f.toURI());
    if (OS.indexOf("win") >= 0) {
        p.toFile().setWritable(true);
    } else {
        Files.setPosixFilePermissions(p, perms);
} catch (IOException e) {
...
booleangivePerms(File f, Set perms, boolean recursive)
Sets permissions to file or directory given. 
boolean success = givePerm(f, perms);
if (f.isDirectory() && recursive) {
    File[] files = f.listFiles();
    for (File file : files) {
        if (!givePerms(file, perms, recursive)) {
            success = false;
return success;