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See the License for the specific language governing permissions and limitations under the License. --> <html lang="en"> <head> <link rel="stylesheet" type="text/css" href="../stylesheets/style.css"> <title>Chown Task</title> </head> <body> <h2 id="chown">Chown</h2> <p><em>Since Apache Ant 1.6</em>.</p> <h3>Description</h3> <p>Changes the owner of a file or all files inside specified directories. Right now it has effect only under Unix. The owner attribute is equivalent to the corresponding argument for the <kbd>chown</kbd> command.</p> <p><a href="../Types/fileset.html">FileSet</a>s, <a href="../Types/dirset.html">DirSet</a>s or <a href="../Types/filelist.html">FileList</a>s can be specified using nested <code><fileset></code>, <code><dirset></code> and <code><filelist></code> elements.</p> <p><em>Since Ant 1.7</em>, this task supports arbitrary <a href="../Types/resources.html#collection">resource collections</a> as nested elements.</p> <p>By default this task will use a single invocation of the underlying <kbd>chown</kbd> command. If you are working on a large number of files this may result in a command line that is too long for your operating system. If you encounter such problems, you should set the <var>maxparallel</var> attribute of this task to a non-zero value. The number to use highly depends on the length of your file names (the depth of your directory tree) and your operating system, so you'll have to experiment a little. POSIX recommends command line length limits of at least 4096 characters, this may give you an approximation for the number you could use as initial value for these experiments.</p> <p>By default this task won't do anything unless it detects it is running on a Unix system. If you know for sure that you have a <kbd>chown</kbd> executable on your <code>PATH</code> that is command line compatible with the Unix command, you can use the task's <var>os</var> attribute and set its value to your current OS.</p> <h3>Parameters</h3> <table class="attr"> <tr> <th scope="col">Attribute</th> <th scope="col">Description</th> <th scope="col">Required</th> </tr> <tr> <td>file</td> <td>the file or directory of which the owner must be changed.</td> <td>Yes, unless nested <code><fileset|filelist|dirset></code> elements are specified</td> </tr> <tr> <td>owner</td> <td>the new owner.</td> <td>Yes</td> </tr> <tr> <td>parallel</td> <td>process all specified files using a single <kbd>chown</kbd> command.</td> <td>No; defaults to <q>true</q></td> </tr> <tr> <td>type</td> <td>One of <q>file</q>, <q>dir</q> or <q>both</q>. If set to <q>file</q>, only the owner of plain files are going to be changed. If set to <q>dir</q>, only the directories are considered.<br/><strong>Note</strong>: The <var>type</var> attribute does not apply to nested <code>dirset</code>s—<code>dirset</code>s always implicitly assume type to be <q>dir</q>.</td> <td>No; default is <q>file</q></td> </tr> <tr> <td>maxparallel</td> <td>Limit the amount of parallelism by passing at most this many sourcefiles at once. Set it to negative integer for unlimited.</td> <td>No; defaults to unlimited</td> </tr> <tr> <td>verbose</td> <td>Whether to print a summary after execution or not.</td> <td>No; defaults to <q>false</q></td> </tr> <tr> <td>os</td> <td>list of Operating Systems on which the command may be executed.</td> <td>No</td> </tr> <tr> <td>osfamily</td> <td>OS family as used in the <a href="../Tasks/conditions.html#os"><os></a> condition.</td> <td>No; defaults to <q>unix</q></td> </tr> </table> <h3>Examples</h3> <p>Make the <samp>start.sh</samp> file belong to <samp>coderjoe</samp> on a UNIX system.</p> <pre><chown file="${dist}/start.sh" owner="coderjoe"/></pre> <p>Make all <samp>.sh</samp> files below <samp>${dist}/bin</samp> belong to <samp>coderjoe</samp> on a UNIX system.</p> <pre> <chown owner="coderjoe"> <fileset dir="${dist}/bin" includes="**/*.sh"/> </chown></pre> <p>Make all files below <samp>shared/sources1</samp> (except those below any directory named <samp>trial</samp>) belong to <samp>coderjoe</samp> on a UNIX system. In addition, all files belonging to a FileSet with <var>id</var>=<code>other.shared.sources</code> get the same owner.</p> <pre> <chown owner="coderjoe"> <fileset dir="shared/sources1"> <exclude name="**/trial/**"/> </fileset> <fileset refid="other.shared.sources"/> </chown></pre> <p>Make <samp>cgi</samp> scripts, files with a <samp>.old</samp> extension or directories beginning with <samp>private_</samp> belong to the user named <samp>webadmin</samp>. A directory ending in <samp>.old</samp> or a file beginning with <samp>private_</samp> would remain unaffected.</p> <pre> <chown owner="webadmin" type="file"> <fileset dir="/web"> <include name="**/*.cgi"/> <include name="**/*.old"/> </fileset> <dirset dir="/web"> <include name="**/private_*"/> </dirset> </chmod></pre> </body> </html>