source: BOOK/final-system/common/e2fsprogs.xml@ a89d3ee

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  <!ENTITY % general-entities SYSTEM "../../general.ent">
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<sect1 id="ch-system-e2fsprogs" role="wrap">
  <?dbhtml filename="e2fsprogs.html"?>

  <title>E2fsprogs-&e2fsprogs-version;</title>

  <indexterm zone="ch-system-e2fsprogs">
    <primary sortas="a-E2fsprogs">E2fsprogs</primary>
  </indexterm>

  <sect2 role="package">
    <title/>

    <para>The E2fsprogs package contains the utilities for handling the
    <systemitem class="filesystem">ext2</systemitem> file system. It also
    supports the <systemitem class="filesystem">ext3</systemitem> and
    <systemitem class="filesystem">ext4</systemitem> journaling
    file systems.</para>

  </sect2>

  <sect2 role="installation">
    <title>Installation of E2fsprogs</title>

    <para os="s1">Fix a potential security issue identified upstream:</para>

<screen os="s2"><userinput>sed -e '/int.*old_desc_blocks/s/int/blk64_t/' \
    -e '/if (old_desc_blocks/s/super->s_first_meta_bg/desc_blocks/' \
    -i lib/ext2fs/closefs.c</userinput></screen>

    <para os="a">The E2fsprogs documentation recommends that the package be
    built in a subdirectory of the source tree:</para>

<screen os="b"><userinput>mkdir -v build
cd build</userinput></screen>

    <para os="c">Prepare E2fsprogs for compilation:</para>

<screen os="d"><userinput>../configure --prefix=/usr --bindir=/bin \
    --with-root-prefix="" --enable-elf-shlibs --disable-libblkid \
    --disable-libuuid --disable-fsck --disable-uuidd</userinput></screen>

    <variablelist os="e">
      <title>The meaning of the configure options:</title>

      <varlistentry os="e1">
        <term><parameter>--with-root-prefix=""</parameter></term>
        <listitem>
          <para>Certain programs (such as the <command>e2fsck</command>
          program) are considered essential programs. When, for example,
          <filename class="directory">/usr</filename> is not mounted,
          these programs still need to be available. They belong in
          directories like <filename class="directory">/lib</filename> and
          <filename class="directory">/sbin</filename>. If this option is
          not passed to E2fsprogs' configure, the programs are installed into
          the <filename class="directory">/usr</filename> directory.</para>
        </listitem>
      </varlistentry>

      <varlistentry os="e2">
        <term><parameter>--enable-elf-shlibs</parameter></term>
        <listitem>
          <para>This creates the shared libraries which some programs
          in this package use.</para>
        </listitem>
      </varlistentry>

      <varlistentry os="e3">
        <term><parameter>--disable-*</parameter></term>
        <listitem>
          <para>This prevents E2fsprogs from building and installing the
          <systemitem class="library">libuuid</systemitem> and
          <systemitem class="library">libblkid</systemitem> libraries, the
          <systemitem class="daemon">uuidd</systemitem> daemon, and the
          <command>fsck</command> wrapper, as Util-Linux installed all of
          them earlier.</para>
        </listitem>
      </varlistentry>

    </variablelist>

    <para os="f">Compile the package:</para>

<screen os="g"><userinput>make</userinput></screen>

    <para os="h">To test the results, issue:</para>

<screen os="h2"><userinput remap="test">make check</userinput></screen>

    <para os="i">Install the binaries, documentation and shared libraries:</para>

<screen os="j"><userinput>make install</userinput></screen>

    <para os="k">Install the static libraries and headers:</para>

<screen os="l"><userinput>make install-libs</userinput></screen>

  </sect2>

  <sect2 id="contents-e2fsprogs" role="content">
    <title>Contents of E2fsprogs</title>

    <segmentedlist>
      <segtitle>Installed programs</segtitle>
      <segtitle>Installed libraries</segtitle>
      <segtitle>Installed directories</segtitle>

      <seglistitem>
        <seg>badblocks, chattr, compile_et, debugfs, dumpe2fs, e2freefrag,
        e2fsck, e2image, e2initrd_helper, e2label, e2undo, e4defrag, filefrag,
        fsck.ext2, fsck.ext3, fsck.ext4, fsck.ext4dev, logsave, lsattr,
        mk_cmds, mke2fs, mkfs.ext2, mkfs.ext3, mkfs.ext4, mkfs.ext4dev,
        mklost+found, resize2fs, tune2fs</seg>
        <seg>libcom_err.[a,so], libe2p.[a,so], libext2fs.[a,so],
        libss.[a,so], libquota.a</seg>
        <seg>/usr/include/e2p, /usr/include/et, /usr/include/ext2fs,
        /usr/include/quota, /usr/include/ss, /usr/share/et, /usr/share/ss</seg>
      </seglistitem>
    </segmentedlist>

    <variablelist>
      <bridgehead renderas="sect3">Short Descriptions</bridgehead>
      <?dbfo list-presentation="list"?>
      <?dbhtml list-presentation="table"?>

      <varlistentry id="badblocks">
        <term><command>badblocks</command></term>
        <listitem>
          <para>Searches a device (usually a disk partition) for bad
          blocks</para>
          <indexterm zone="ch-system-e2fsprogs badblocks">
            <primary sortas="b-badblocks">badblocks</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="chattr">
        <term><command>chattr</command></term>
        <listitem>
          <para>Changes the attributes on a Linux file system</para>
          <indexterm zone="ch-system-e2fsprogs chattr">
            <primary sortas="b-chattr">chattr</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="compile_et">
        <term><command>compile_et</command></term>
        <listitem>
          <para>An error table compiler; it converts a table of error-code
          names and messages into a C source file suitable for use with the
          <filename class="libraryfile">com_err</filename> library</para>
          <indexterm zone="ch-system-e2fsprogs compile_et">
            <primary sortas="b-compile_et">compile_et</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="debugfs">
        <term><command>debugfs</command></term>
        <listitem>
          <para>A file system debugger; it can be used to examine and change
          the state of an <systemitem class="filesystem">ext2</systemitem>
          file system</para>
          <indexterm zone="ch-system-e2fsprogs debugfs">
            <primary sortas="b-debugfs">debugfs</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="dumpe2fs">
        <term><command>dumpe2fs</command></term>
        <listitem>
          <para>Prints the super block and blocks group information for the
          file system present on a given device</para>
          <indexterm zone="ch-system-e2fsprogs dumpe2fs">
            <primary sortas="b-dumpe2fs">dumpe2fs</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="e2freefrag">
        <term><command>e2freefrag</command></term>
        <listitem>
          <para> Reports free space fragmentation information</para>
          <indexterm zone="ch-system-e2fsprogs e2freefrag">
            <primary sortas="b-e2freefrag">e2freefrag</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="e2fsck">
        <term><command>e2fsck</command></term>
        <listitem>
          <para>Is used to check, and optionally repair <systemitem
          class="filesystem">ext2</systemitem>, <systemitem
          class="filesystem">ext3</systemitem> and <systemitem
          class="filesystem">ext4</systemitem>file systems</para>
          <indexterm zone="ch-system-e2fsprogs e2fsck">
            <primary sortas="b-e2fsck">e2fsck</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="e2image">
        <term><command>e2image</command></term>
        <listitem>
          <para>Is used to save critical <systemitem
          class="filesystem">ext2</systemitem> file system data to a file</para>
          <indexterm zone="ch-system-e2fsprogs e2image">
            <primary sortas="b-e2image">e2image</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="e2initrd_helper">
        <term><command>e2initrd_helper</command></term>
        <listitem>
          <para>Prints the FS type of a given filesystem, given either a
          device name or label</para>
          <indexterm zone="ch-system-e2fsprogs e2initrd_helper">
            <primary sortas="b-e2initrd_helper">e2initrd_helper</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="e2label">
        <term><command>e2label</command></term>
        <listitem>
          <para>Displays or changes the file system label on the <systemitem
          class="filesystem">ext2</systemitem> file system present on a given
          device</para>
          <indexterm zone="ch-system-e2fsprogs e2label">
            <primary sortas="b-e2label">e2label</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="e2undo">
        <term><command>e2undo</command></term>
        <listitem>
          <para>Replays an undo log for an ext2/ext3/ext4 filesystem</para>
          <indexterm zone="ch-system-e2fsprogs e2undo">
            <primary sortas="b-e2undo">e2undo</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="e4defrag">
        <term><command>e4defrag</command></term>
        <listitem>
          <para>Online defragmenter for ext4 filesystems</para>
          <indexterm zone="ch-system-e2fsprogs e4defrag">
            <primary sortas="b-e4defrag">e4defrag</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="filefrag">
        <term><command>filefrag</command></term>
        <listitem>
          <para>Reports on how badly fragmented a particular file might be</para>
          <indexterm zone="ch-system-e2fsprogs filefrag">
            <primary sortas="b-filefrag">filefrag</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="fsck.ext2">
        <term><command>fsck.ext2</command></term>
        <listitem>
          <para>By default checks <systemitem class="filesystem">ext2</systemitem>
          file systems</para>
          <indexterm zone="ch-system-e2fsprogs fsck.ext2">
            <primary sortas="b-fsck.ext2">fsck.ext2</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="fsck.ext3">
        <term><command>fsck.ext3</command></term>
        <listitem>
          <para>By default checks <systemitem class="filesystem">ext3</systemitem>
          file systems</para>
          <indexterm zone="ch-system-e2fsprogs fsck.ext3">
            <primary sortas="b-fsck.ext3">fsck.ext3</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="fsck.ext4">
        <term><command>fsck.ext4</command></term>
        <listitem>
          <para>By default checks <systemitem class="filesystem">ext4</systemitem>
          file systems</para>
          <indexterm zone="ch-system-e2fsprogs fsck.ext4">
            <primary sortas="b-fsck.ext4">fsck.ext4</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="fsck.ext4dev">
        <term><command>fsck.ext4dev</command></term>
        <listitem>
          <para>By default checks <systemitem class="filesystem">ext4dev</systemitem>
          file systems</para>
          <indexterm zone="ch-system-e2fsprogs fsck.ext4dev">
            <primary sortas="b-fsck.ext4dev">fsck.ext4dev</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="logsave">
        <term><command>logsave</command></term>
        <listitem>
          <para>Saves the output of a command in a log file</para>
          <indexterm zone="ch-system-e2fsprogs logsave">
            <primary sortas="b-logsave">logsave</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="lsattr">
        <term><command>lsattr</command></term>
        <listitem>
          <para>Lists the attributes of files on a second extended file
          system</para>
          <indexterm zone="ch-system-e2fsprogs lsattr">
            <primary sortas="b-lsattr">lsattr</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="mk_cmds">
        <term><command>mk_cmds</command></term>
        <listitem>
          <para>Converts a table of command names and help messages into a C
          source file suitable for use with the <filename
          class="libraryfile">libss</filename> subsystem library</para>
          <indexterm zone="ch-system-e2fsprogs mk_cmds">
            <primary sortas="b-mk_cmds">mk_cmds</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="mke2fs">
        <term><command>mke2fs</command></term>
        <listitem>
          <para>Creates an <systemitem class="filesystem">ext2</systemitem>,
          <systemitem class="filesystem">ext3</systemitem> or <systemitem
          class="filesystem">ext4</systemitem> file system on the given device</para>
          <indexterm zone="ch-system-e2fsprogs mke2fs">
            <primary sortas="b-mke2fs">mke2fs</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="mkfs.ext2">
        <term><command>mkfs.ext2</command></term>
        <listitem>
          <para>By default creates <systemitem class="filesystem">ext2</systemitem>
          file systems</para>
          <indexterm zone="ch-system-e2fsprogs mkfs.ext2">
            <primary sortas="b-mkfs.ext2">mkfs.ext2</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="mkfs.ext3">
        <term><command>mkfs.ext3</command></term>
        <listitem>
          <para>By default creates <systemitem class="filesystem">ext3</systemitem>
          file systems</para>
          <indexterm zone="ch-system-e2fsprogs mkfs.ext3">
            <primary sortas="b-mkfs.ext3">mkfs.ext3</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="mkfs.ext4">
        <term><command>mkfs.ext4</command></term>
        <listitem>
          <para>By default creates <systemitem class="filesystem">ext4</systemitem>
          file systems</para>
          <indexterm zone="ch-system-e2fsprogs mkfs.ext4">
            <primary sortas="b-mkfs.ext4">mkfs.ext4</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="mkfs.ext4dev">
        <term><command>mkfs.ext4dev</command></term>
        <listitem>
          <para>By default creates <systemitem class="filesystem">ext4dev</systemitem>
          file systems</para>
          <indexterm zone="ch-system-e2fsprogs mkfs.ext4dev">
            <primary sortas="b-mkfs.ext4dev">mkfs.ext4dev</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="mklost-found">
        <term><command>mklost+found</command></term>
        <listitem>
          <para>Used to create a <filename class="directory">lost+found</filename>
          directory on an <systemitem class="filesystem">ext2</systemitem> file
          system; it pre-allocates disk blocks to this directory to lighten the
          task of <command>e2fsck</command></para>
          <indexterm zone="ch-system-e2fsprogs mklost-found">
            <primary sortas="b-mklost+found">mklost+found</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="resize2fs">
        <term><command>resize2fs</command></term>
        <listitem>
          <para>Can be used to enlarge or shrink an <systemitem
          class="filesystem">ext2</systemitem> file system</para>
          <indexterm zone="ch-system-e2fsprogs resize2fs">
            <primary sortas="b-resize2fs">resize2fs</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="tune2fs">
        <term><command>tune2fs</command></term>
        <listitem>
          <para>Adjusts tunable file system parameters on an <systemitem
          class="filesystem">ext2</systemitem> file system</para>
          <indexterm zone="ch-system-e2fsprogs tune2fs">
            <primary sortas="b-tune2fs">tune2fs</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="libcom_err">
        <term><filename class="libraryfile">libcom_err</filename></term>
        <listitem>
          <para>The common error display routine</para>
          <indexterm zone="ch-system-e2fsprogs libcom_err">
            <primary sortas="c-libcom_err">libcom_err</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="libe2p">
        <term><filename class="libraryfile">libe2p</filename></term>
        <listitem>
          <para>Used by <command>dumpe2fs</command>, <command>chattr</command>,
          and <command>lsattr</command></para>
          <indexterm zone="ch-system-e2fsprogs libe2p">
            <primary sortas="c-libe2p">libe2p</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="libext2fs">
        <term><filename class="libraryfile">libext2fs</filename></term>
        <listitem>
          <para>Contains routines to enable user-level programs to manipulate an
          <systemitem class="filesystem">ext2</systemitem> file system</para>
          <indexterm zone="ch-system-e2fsprogs libext2fs">
            <primary sortas="c-libext2fs">libext2fs</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="libquota">
        <term><filename class="libraryfile">libquota</filename></term>
        <listitem>
          <para>Provides an interface for creating and updating quota files
          and ext4 superblock fields</para>
          <indexterm zone="ch-system-e2fsprogs libquota">
            <primary sortas="c-libquota">libquota</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="libss">
        <term><filename class="libraryfile">libss</filename></term>
        <listitem>
          <para>Used by <command>debugfs</command></para>
          <indexterm zone="ch-system-e2fsprogs libss">
            <primary sortas="c-libss">libss</primary>
          </indexterm>
        </listitem>
      </varlistentry>

    </variablelist>

  </sect2>

</sect1>