blob: e497bcf61a080c9b051b5082dd11a89c4598942b (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
|
/*
* Copyright (C) 2012 The CyanogenMod Project
*
* Licensed under the Apache 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.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.cyanogenmod.filemanager.util;
import com.cyanogenmod.filemanager.commands.shell.Command;
/**
* A helper class with useful methods for deal with linux shells.
*/
public final class ShellHelper {
/**
* Constructor of <code>ShellHelper</code>.
*/
private ShellHelper() {
super();
}
/**
* Method that prepares an argument to be executed. This method
* ensures that the arguments no have malicious code
*
* @param arg Argument
* @return String The prepared argument
*/
public static String prepareArgument(final String arg) {
if (arg == null) {
return null;
}
String preparedArgs = arg.replace("\"", "\\\""); //$NON-NLS-1$//$NON-NLS-2$
preparedArgs = preparedArgs.replace("$", "\\$"); //$NON-NLS-1$//$NON-NLS-2$
return preparedArgs;
}
/**
* Method that returns the command line of a program command to be used as part as the
* arguments of the shell command.
*
* @param command The program command to parse
* @return String The command line of a program command
*/
public static String getProgramCmdLine(Command command) {
//The command line must be like "<cmd> <args>" with double quotes, replacing
//all double quotes <args> by \"
String args = command.getArguments();
if (args == null) {
args = ""; //$NON-NLS-1$
}
StringBuilder subcmd = new StringBuilder();
subcmd.append(command.getCommand())
.append(" ") //$NON-NLS-1$
.append(args);
//Prepare and build command string
return ShellHelper.prepareArgument(subcmd.toString());
}
}
|
