/*
* Copyright (C) 2010, Robin Rosenberg
* and other copyright owners as documented in the project's IP log.
*
* This program and the accompanying materials are made available
* under the terms of the Eclipse Distribution License v1.0 which
* accompanies this distribution, is reproduced below, and is
* available at http://www.eclipse.org/org/documents/edl-v10.php
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
*
* - Neither the name of the Eclipse Foundation, Inc. nor the
* names of its contributors may be used to endorse or promote
* products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package org.eclipse.jgit.util;
import java.io.BufferedReader;
import java.io.File;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintStream;
import java.nio.charset.Charset;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.attribute.PosixFilePermission;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Set;
import org.eclipse.jgit.api.errors.JGitInternalException;
import org.eclipse.jgit.errors.CommandFailedException;
import org.eclipse.jgit.lib.Constants;
import org.eclipse.jgit.lib.Repository;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Base FS for POSIX based systems
*
* @since 3.0
*/
public class FS_POSIX extends FS {
private final static Logger LOG = LoggerFactory.getLogger(FS_POSIX.class);
private static final int DEFAULT_UMASK = 0022;
private volatile int umask = -1;
/** Default constructor. */
protected FS_POSIX() {
}
/**
* Constructor
*
* @param src
* FS to copy some settings from
*/
protected FS_POSIX(FS src) {
super(src);
if (src instanceof FS_POSIX) {
umask = ((FS_POSIX) src).umask;
}
}
@Override
public FS newInstance() {
return new FS_POSIX(this);
}
/**
* Set the umask, overriding any value observed from the shell.
*
* @param umask
* mask to apply when creating files.
* @since 4.0
*/
public void setUmask(int umask) {
this.umask = umask;
}
private int umask() {
int u = umask;
if (u == -1) {
u = readUmask();
umask = u;
}
return u;
}
/** @return mask returned from running {@code umask} command in shell. */
private static int readUmask() {
try {
Process p = Runtime.getRuntime().exec(
new String[] { "sh", "-c", "umask" }, //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
null, null);
try (BufferedReader lineRead = new BufferedReader(
new InputStreamReader(p.getInputStream(), Charset
.defaultCharset().name()))) {
if (p.waitFor() == 0) {
String s = lineRead.readLine();
if (s != null && s.matches("0?\\d{3}")) { //$NON-NLS-1$
return Integer.parseInt(s, 8);
}
}
return DEFAULT_UMASK;
}
} catch (Exception e) {
return DEFAULT_UMASK;
}
}
@Override
protected File discoverGitExe() {
String path = SystemReader.getInstance().getenv("PATH"); //$NON-NLS-1$
File gitExe = searchPath(path, "git"); //$NON-NLS-1$
if (gitExe == null) {
if (SystemReader.getInstance().isMacOS()) {
if (searchPath(path, "bash") != null) { //$NON-NLS-1$
// On MacOSX, PATH is shorter when Eclipse is launched from the
// Finder than from a terminal. Therefore try to launch bash as a
// login shell and search using that.
String w;
try {
w = readPipe(userHome(),
new String[]{"bash", "--login", "-c", "which git"}, // //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ //$NON-NLS-4$
Charset.defaultCharset().name());
} catch (CommandFailedException e) {
LOG.warn(e.getMessage());
return null;
}
if (!StringUtils.isEmptyOrNull(w)) {
gitExe = new File(w);
}
}
}
}
return gitExe;
}
@Override
public boolean isCaseSensitive() {
return !SystemReader.getInstance().isMacOS();
}
@Override
public boolean supportsExecute() {
return true;
}
@Override
public boolean canExecute(File f) {
return FileUtils.canExecute(f);
}
@Override
public boolean setExecute(File f, boolean canExecute) {
if (!isFile(f))
return false;
if (!canExecute)
return f.setExecutable(false);
try {
Path path = f.toPath();
Set<PosixFilePermission> pset = Files.getPosixFilePermissions(path);
// owner (user) is always allowed to execute.
pset.add(PosixFilePermission.OWNER_EXECUTE);
int mask = umask();
apply(pset, mask, PosixFilePermission.GROUP_EXECUTE, 1 << 3);
apply(pset, mask, PosixFilePermission.OTHERS_EXECUTE, 1);
Files.setPosixFilePermissions(path, pset);
return true;
} catch (IOException e) {
// The interface doesn't allow to throw IOException
final boolean debug = Boolean.parseBoolean(SystemReader
.getInstance().getProperty("jgit.fs.debug")); //$NON-NLS-1$
if (debug)
System.err.println(e);
return false;
}
}
private static void apply(Set<PosixFilePermission> set,
int umask, PosixFilePermission perm, int test) {
if ((umask & test) == 0) {
// If bit is clear in umask, permission is allowed.
set.add(perm);
} else {
// If bit is set in umask, permission is denied.
set.remove(perm);
}
}
@Override
public ProcessBuilder runInShell(String cmd, String[] args) {
List<String> argv = new ArrayList<String>(4 + args.length);
argv.add("sh"); //$NON-NLS-1$
argv.add("-c"); //$NON-NLS-1$
argv.add(cmd + " \"$@\""); //$NON-NLS-1$
argv.add(cmd);
argv.addAll(Arrays.asList(args));
ProcessBuilder proc = new ProcessBuilder();
proc.command(argv);
return proc;
}
/**
* @since 4.0
*/
@Override
public ProcessResult runHookIfPresent(Repository repository, String hookName,
String[] args, PrintStream outRedirect, PrintStream errRedirect,
String stdinArgs) throws JGitInternalException {
return internalRunHookIfPresent(repository, hookName, args, outRedirect,
errRedirect, stdinArgs);
}
@Override
public boolean retryFailedLockFileCommit() {
return false;
}
@Override
public boolean supportsSymlinks() {
return true;
}
@Override
public void setHidden(File path, boolean hidden) throws IOException {
// no action on POSIX
}
/**
* @since 3.3
*/
@Override
public Attributes getAttributes(File path) {
return FileUtils.getFileAttributesPosix(this, path);
}
/**
* @since 3.3
*/
@Override
public File normalize(File file) {
return FileUtils.normalize(file);
}
/**
* @since 3.3
*/
@Override
public String normalize(String name) {
return FileUtils.normalize(name);
}
/**
* @since 3.7
*/
@Override
public File findHook(Repository repository, String hookName) {
final File gitdir = repository.getDirectory();
if (gitdir == null) {
return null;
}
final Path hookPath = gitdir.toPath().resolve(Constants.HOOKS)
.resolve(hookName);
if (Files.isExecutable(hookPath))
return hookPath.toFile();
return null;
}
}