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POChanging system file permission
 

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    <p>I've really tried everything:</p> <ul> <li><a href="https://nethack-android.googlecode.com/svn-history/r430/trunk/slashem-0.0.7E7F3/sys/android/NetHackApp/src/com/slashemff/NetHackFileHelpers.java" rel="nofollow noreferrer">NetHackFileHelpers</a></li> <li><a href="https://stackoverflow.com/questions/11408154/how-to-get-file-permission-mode-programmatically-in-java">How to get File Permission Mode programmatically in Java</a></li> <li><a href="https://stackoverflow.com/questions/8412384/change-file-permission-in-application">Change file permission in application</a></li> <li><a href="https://stackoverflow.com/questions/7129144/mount-r-w-system-in-android-application-to-edit-read-only-files">Mount R/W system in android application to edit Read Only files</a></li> </ul> <p>Now, suppose I've remounted as root, and therefore <code>RW</code> permission on file system (Android version 2.3.7):</p> <pre><code>Process process = Runtime.getRuntime().exec("su"); DataOutputStream os = new DataOutputStream(process.getOutputStream()); os.writeBytes("chmod -c 0777 /system/etc/customization/settings/com/android/browser/custom_settings.xml\n"); os.writeBytes("exit\n"); os.flush(); process.waitFor(); </code></pre> <p>or:</p> <pre><code>Process process = Runtime.getRuntime().exec("su -c \"/system/etc/customization/settings/com/android/browser/custom_settings.xml\""); </code></pre> <p>or: </p> <pre><code>Class&lt;?&gt; fileUtils = Class.forName("android.os.FileUtils"); Method setPermissions = fileUtils.getMethod("setPermissions", String.class, int.class, int.class, int.class); int a = (Integer) setPermissions.invoke(null, "/system/etc/customization/settings/com/android/browser/custom_settings.xml", 0777, -1, -1); </code></pre> <p>The behaviour is the same: nothing happens. Whereas if I <code>chmod</code> from adb shell works fine. How can I change the permissions of that file from within my code?</p>
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