Since Ant 1.6.


Changes the group of a file or all files inside specified directories. Right now it has effect only under Unix. The group atribute is equivalent to the coresponding argument for the chgrp command.

FileSets, DirSets or FileLists can be specified using nested <fileset>, <dirset> and <filelist> elements.

By default this task will use a single invocation of the underlying chgrp 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 maxparallel 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.


Attribute Description Required
file the file or directory of which the group must be changed. Yes or nested <fileset/list> elements.
group the new group. Yes
parallel process all specified files using a single chgrp command. Defaults to true. No
type One of file, dir or both. If set to file, only the group of plain files are going to be changed. If set to dir, only the directories are considered.
Note: The type attribute does not apply to nested dirsets - dirsets always implicitly assume type to be dir.
No, default is file
maxparallel Limit the amount of parallelism by passing at most this many sourcefiles at once. Set it to <= 0 for unlimited. Defaults to unlimited. No
verbose Whether to print a summary after execution or not. Defaults to false. No


    <chgrp file="${dist}/" group="coders"/>

makes the "" file belong to the coders group on a UNIX system.

    <chgrp group="coders">
      <fileset dir="${dist}/bin" includes="**/*.sh"/>

makes all ".sh" files below ${dist}/bin belong to the coders group on a UNIX system.

    <chgrp group="coders">
      <fileset dir="shared/sources1">
        <exclude name="**/trial/**"/>

      <fileset refid="other.shared.sources"/>

makes all files below shared/sources1 (except those below any directory named trial) belong to the coders group on a UNIX system. In addition all files belonging to a FileSet with id other.shared.sources get the same group.

<chgrp group="webdev" type="file">
  <fileset dir="/web">
    <include name="**/*.test.jsp"/>

    <include name="**/*.new"/>
  <dirset dir="/web">
    <include name="**/test_*"/>


makes all .test.jsp, and .new files belong to group webdev. Directories beginning with test_ also will belong to webdev, but if there is a directory that ends in .new or a file that begins with test_ it will be unaffected.

Source: Apache Ant