/***** BEGIN LICENSE BLOCK *****
* Version: EPL 2.0/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Eclipse Public
* License Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.eclipse.org/legal/cpl-v10.html
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
*
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
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***** END LICENSE BLOCK *****/
/**
* $Id: $
*/
package jnr.posix;
import jnr.ffi.
Memory;
import jnr.ffi.
Pointer;
import jnr.ffi.
StructLayout;
/**
*
*/
public abstract class
BaseFileStat implements
FileStat {
protected final
POSIX posix;
protected final
Pointer memory;
protected
BaseFileStat(
NativePOSIX posix,
StructLayout layout) {
this.
posix =
posix;
this.
memory =
Memory.
allocate(
posix.
getRuntime(),
layout.
size());
}
public java.lang.
String ftype() {
if (
isFile()) {
return "file";
} else if (
isDirectory()) {
return "directory";
} else if (
isCharDev()) {
return "characterSpecial";
} else if (
isBlockDev()) {
return "blockSpecial";
} else if (
isFifo()) {
return "fifo";
} else if (
isSymlink()) {
return "link";
} else if (
isSocket()) {
return "socket";
}
return "unknown";
}
public boolean
groupMember(int
gid) {
if (
posix.
getgid() ==
gid ||
posix.
getegid() ==
gid) {
return true;
}
// FIXME: Though not Posix, windows has different mechanism for this.
return false;
}
public boolean
isBlockDev() {
return (
mode() &
S_IFMT) ==
S_IFBLK;
}
public boolean
isCharDev() {
return (
mode() &
S_IFMT) ==
S_IFCHR;
}
public boolean
isDirectory() {
return (
mode() &
S_IFMT) ==
S_IFDIR;
}
public boolean
isEmpty() {
return
st_size() == 0;
}
public boolean
isExecutable() {
if (
posix.
geteuid() == 0) return (
mode() &
S_IXUGO) != 0;
if (
isOwned()) return (
mode() &
S_IXUSR) != 0;
if (
isGroupOwned()) return (
mode() &
S_IXGRP) != 0;
return (
mode() &
S_IXOTH) != 0;
}
public boolean
isExecutableReal() {
if (
posix.
getuid() == 0) return (
mode() &
S_IXUGO) != 0;
if (
isROwned()) return (
mode() &
S_IXUSR) != 0;
if (
groupMember(
gid())) return (
mode() &
S_IXGRP) != 0;
return (
mode() &
S_IXOTH) != 0;
}
public boolean
isFile() {
return (
mode() &
S_IFMT) ==
S_IFREG;
}
public boolean
isFifo() {
return (
mode() &
S_IFMT) ==
S_IFIFO;
}
public boolean
isGroupOwned() {
return
groupMember(
gid());
}
public boolean
isIdentical(
FileStat other) {
return
dev() ==
other.
dev() &&
ino() ==
other.
ino();
}
public boolean
isNamedPipe() {
return (
mode() &
S_IFIFO) != 0;
}
public boolean
isOwned() {
return
posix.
geteuid() ==
uid();
}
public boolean
isROwned() {
return
posix.
getuid() ==
uid();
}
public boolean
isReadable() {
if (
posix.
geteuid() == 0) return true;
if (
isOwned()) return (
mode() &
S_IRUSR) != 0;
if (
isGroupOwned()) return (
mode() &
S_IRGRP) != 0;
return (
mode() &
S_IROTH) != 0;
}
public boolean
isReadableReal() {
if (
posix.
getuid() == 0) return true;
if (
isROwned()) return (
mode() &
S_IRUSR) != 0;
if (
groupMember(
gid())) return (
mode() &
S_IRGRP) != 0;
return (
mode() &
S_IROTH) != 0;
}
public boolean
isSetgid() {
return (
mode() &
S_ISGID) != 0;
}
public boolean
isSetuid() {
return (
mode() &
S_ISUID) != 0;
}
public boolean
isSocket() {
return (
mode() &
S_IFMT) ==
S_IFSOCK;
}
public boolean
isSticky() {
return (
mode() &
S_ISVTX) != 0;
}
public boolean
isSymlink() {
return (
mode() &
S_IFMT) ==
S_IFLNK;
}
public boolean
isWritable() {
if (
posix.
geteuid() == 0) return true;
if (
isOwned()) return (
mode() &
S_IWUSR) != 0;
if (
isGroupOwned()) return (
mode() &
S_IWGRP) != 0;
return (
mode() &
S_IWOTH) != 0;
}
public boolean
isWritableReal() {
if (
posix.
getuid() == 0) return true;
if (
isROwned()) return (
mode() &
S_IWUSR) != 0;
if (
groupMember(
gid())) return (
mode() &
S_IWGRP) != 0;
return (
mode() &
S_IWOTH) != 0;
}
public int
major(long
dev) {
return (int) (
dev >> 24) & 0xff;
}
public int
minor(long
dev) {
return (int) (
dev & 0xffffff);
}
}