udevil/README

README for udevil v0.4.0+


For updates and instructions visit:
    http://ignorantguru.github.com/udevil/
    http://ignorantguru.github.com/udevil/news.html


CONTENTS

    DESCRIPTION
    PACKAGES
    INSTALLER
    BUILD
    BUILD NEXT
    CREATE DEB PACKAGE
    POST INSTALL
        Kernel Polling
        Networks and Files
        NTFS-3G
        Set SUID
        systemd Service
    ENABLE KERNEL POLLING
    UNINSTALL
    TRANSLATIONS
    LICENSE


DESCRIPTION

    Mounts and unmounts removable devices and networks without a password (set
    suid), shows device info, monitors device changes.  Emulates mount's and
    udisks's command line usage and udisks v1's output.  Includes the devmon
    automounting daemon.

    Run 'udevil --help' for usage.  See /etc/udevil/udevil.conf for config.
        http://ignorantguru.github.com/udevil/udevil--help.html
        http://ignorantguru.github.com/udevil/udevil.conf.txt


PACKAGES

    Find or add packages, forum threads, and other info for your distro:
        https://github.com/IgnorantGuru/spacefm/wiki/Distros

    For other distros:
        See INSTALLER below

    NOTE: See POST INSTALL section below for post-installation steps.


INSTALLER

    A self-extracting installer is available (udevil-x.x.x-installer.sh):
        https://github.com/IgnorantGuru/udevil/tree/master/packages
            (To save a file, click on its filename and click 'View Raw')

    The installer requires the build dependencies listed below in BUILD.  If
    any dependencies are missing, examine the error, install missing packages,
    and try again.

    The installer MUST be run in a terminal.  It automatically builds and
    installs.  Run it like this:

        bash udevil-x.x.x-installer.sh

    or to see options:

        bash udevil-x.x.x-installer.sh --help

    To reinstall or upgrade, just run the latest installer again.

    NOTE: See POST INSTALL section below for post-installation steps.


BUILD

    1)  Install required build dependencies (below are Debian package names -
        packages names on your distro may vary but should be similar):

            libglib2.0-0 libglib2.0-dev libudev0 (>=143) libudev-dev
            autotools-dev build-essential fakeroot intltool pkg-config

        Also recommended for network support: cifs-utils curlftpfs sshfs

        Also recommended if using devmon: eject spacefm|zenity

        configure will report anything missing when you run it as shown below.

    2)  Use these commands to download the udevil tarball and build:

        # Download & Extract
        mkdir /tmp/udevil-build && cd /tmp/udevil-build
        wget -O udevil.tar.gz https://github.com/IgnorantGuru/udevil/tarball/master
        tar xzf udevil.tar.gz
        cd IgnorantGuru-udevil-*

        # Build & Install
        ./configure
        make
        sudo make install

        # Remove Temporary Files
        cd / && rm -rf /tmp/udevil-build

    NOTES:

        * If configure reports missing dependencies, install them and run
          configure again before proceeding to make.

        * By default, systemd configuration files for devmon are installed to:
              /etc/conf.d/devmon
              /usr/lib/systemd/system/devmon@.service
          To skip installation of these files, use configure option
          --disable-systemd   In either case, systemd is NOT required.

        * See POST INSTALL section below for post-installation steps.


BUILD NEXT

    The git 'next' branch of udevil is a work in progress which eventually
    becomes the next release version.  To build from this branch, install the
    required build dependencies listed above in BUILD, then:

    # Download & Extract
    mkdir /tmp/udevil-next && cd /tmp/udevil-next
    wget -O udevil-next.tar.gz https://github.com/IgnorantGuru/udevil/tarball/next
    tar xzf udevil-next.tar.gz
    cd IgnorantGuru-udevil-*

    # Build, & Install
    ./autogen.sh   # pass desired configure options (if any) here to autogen.sh
    make
    sudo make install

    # Remove Temporary Files
    cd / && rm -rf /tmp/udevil-next


CREATE DEB PACKAGE

    To build a deb file of udevil on your Debian-based distro:

    1)  Install build dependencies (see BUILD section above) plus 'debhelper'.

    2)  Use these commands to download and extract the udevil tarball (be sure
        to USE A TMP BUILD PATH THAT DOES NOT CONTAIN SPACES):

        mkdir /tmp/udevil-build && cd /tmp/udevil-build  # no spaces in path
        # Note: you can change "master" to "next" if you want the next branch:
        wget -O udevil.tar.gz https://github.com/IgnorantGuru/udevil/tarball/master
        tar xzf udevil.tar.gz
        cd IgnorantGuru-udevil-*

    3)  Move the distros/debian directory into the source directory:

        mv distros/debian .

    4)  Build package:  (the package files will appear in the parent directory)

        dpkg-buildpackage -b -uc
        cd .. && rm -rf IgnorantGuru-udevil-* udevil.tar.gz

    5)  To install the package you built:

        dpkg -i udevil*.deb


POST INSTALL

    Kernel Polling
    --------------

    You may need to enable kernel polling for device media to be detected by
    udevil.  See ENABLE KERNEL POLLING section below.


    Networks and Files
    ------------------

    By default, /etc/udevil/udevil.conf is set to allow only local fileystems
    to be mounted, with mounting of networks and ISO files disallowed.  To
    allow networks and files to be mounted, in /etc/udevil/udevil.conf set:

        allowed_types = $KNOWN_FILESYSTEMS, file, cifs, nfs, curlftpfs, sshfs, davfs

    You may also need to install curlftpfs or ftpfs (ftp://), cifs or smbfs
    (smb://), sshfs (ssh://), and davfs2 (http://).


    NTFS-3G
    -------

    If local ntfs filesystems aren't mounted writable, you may need to
    configure your system to mount ntfs with ntfs-3g (on some distros this is
    already done).  For example:

        sudo ln -s /sbin/mount.ntfs-3g /sbin/mount.ntfs

        # OR if mount.ntfs-3g is located in /usr/bin:
        sudo ln -s /usr/bin/mount.ntfs-3g /usr/bin/mount.ntfs


    Set SUID
    --------

    After installing udevil, /usr/bin/udevil should have the suid bit already
    set.  If not, set it like this:

        sudo chown root:root /usr/bin/udevil
        sudo chmod u+s,go-s,ugo+x /usr/bin/udevil
        ls -l /usr/bin/udevil
            -rwsr-xr-x 1 root root 226625 May 22 08:13 /usr/bin/udevil

    OR, to restrict execution of udevil to the 'plugdev' group only:

        sudo chown root:plugdev /usr/bin/udevil
        sudo chmod u+s,go-s,o-x /usr/bin/udevil
        ls -l /usr/bin/udevil
            -rwsr-xr-- 1 root plugdev 226625 May 22 08:13 /usr/bin/udevil

    OR, if you don't want to use udevil for mounting, you can unset suid:
        sudo chown root:root /usr/bin/udevil
        sudo chmod ugo-s,ugo+x /usr/bin/udevil
        ls -l /usr/bin/udevil
            -rwxr-xr-x 1 root root 226625 May 22 08:13 /usr/bin/udevil

    You can also limit users and groups by editing /etc/udevil/udevil.conf


    systemd Service
    ---------------

    To start devmon as a systemd service:
        systemctl start devmon@<user>


ENABLE KERNEL POLLING

    You may need to enable kernel polling for device media to be detected by
    udevil.  For example, if you insert a CD and udevil's monitor command
    doesn't report a change to the device, or udevil doesn't see a filesystem
    on the device, this is a symptom that kernel polling is not enabled.

    Kernel polling is a new feature of the Linux kernel and udev, so most
    distros don't yet have it enabled. Even if you are using udisks, enabling
    kernel polling is recommended to eliminate the need for udisks to do
    userspace polling. Kernel polling also corrects a common issue where the
    eject button on a drive won't respond with the newer udev.

    To use kernel polling, your Linux kernel may need to be 2.6.38 or newer,
    and udev may need to be version 173 or newer.

    TO DETERIME IF KERNEL POLLING IS ENABLED, run these commands:

        cat /sys/module/block/parameters/events_dfl_poll_msecs
        cat /sys/block/sr0/events_poll_msecs

    If you get 0 or -1 from those commands, then it's probably disabled.

    TO ENABLE KERNEL POLLING PERMANENTLY (survives a reboot), add this command
    to your /etc/rc.local file (anywhere before the 'exit' line in that file):

        echo 2000 > /sys/module/block/parameters/events_dfl_poll_msecs

    Any number between 2000 and 5000 (milliseconds) should be reasonable - the
    higher 5000 means poll every 5 seconds, which is less overhead but a little
    slower.

    OR you can pass this option to the kernel boot command line in grub:

        block.events_dfl_poll_msecs=2000


    TO ENABLE KERNEL POLLING TEMPORARILY, enable common polling for the block
    module:

        sudo bash -c 'echo 2000 > /sys/module/block/parameters/events_dfl_poll_msecs'

    OR you can enable polling just for a single device like this (/dev/sr0 in
    this example):

        sudo bash -c 'echo 2000 > /sys/block/sr0/events_poll_msecs'

    The change should be immediate - media will be detected and the eject
    button on the drive should work normally again. However, the above changes
    will be lost when you reboot.

    References:
    http://www.mail-archive.com/lfs-dev@linuxfromscratch.org/msg15714.html
    http://blogs.gentoo.org/mgorny/2011/06/20/uam-can-now-mount-cds-and-dvds/
    https://bugs.archlinux.org/task/25609


UNINSTALL

    If you installed from a package, use your package manager to remove udevil.
    Otherwise, extract the tarball and enter the directory containing
    configure:

        # first run configure with your original options if needed:
        ./configure
        sudo make uninstall
        # Note: /etc/udevil/ is not automatically removed


TRANSLATIONS

    Adding or updating a translation of udevil doesn't require any special
    tools, just a text editor.  For instructions, see the TRANSLATE file.


LICENSE

    udevil - Copyright (C) 2013   GPL3+

    This program is free software; you can redistribute it and/or modify it
    under the terms of the GNU General Public License as published by the
    Free Software Foundation; either version 3 of the License, or (at your
    option) any later version.

    USE AT YOUR OWN RISK.  This program is distributed in the hope that it
    will be useful, but WITHOUT ANY WARRANTY; without even the implied
    warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
    the GNU General Public License for more details.

    You should have received a copy of the GNU General Public License along
    with this program; if not,  write to the Free Software Foundation, Inc.,
    51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

    See COPYING file.