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README.html
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<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>fbind</title>
<style>
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<h1 id="fbind">fbind</h1>
<hr>
<ul>
<li><a href="#description">DESCRIPTION</a></li>
<li><a href="#license">LICENSE</a></li>
<li><a href="#disclaimer">DISCLAIMER</a></li>
<li><a href="#warning">WARNING</a></li>
<li><a href="#pre-requisites">PRE-REQUISITES</a></li>
<li><a href="#config-syntax">CONFIG SYNTAX</a></li>
<li><a href="#config-examples">CONFIG EXAMPLES</a></li>
<li><a href="#terminal-commands">TERMINAL COMMANDS</a></li>
<li><a href="#notes">NOTES</a></li>
<li><a href="#links">LINKS</a></li>
<li><a href="#latest-changes">LATEST CHANGES</a></li>
</ul>
<hr>
<h2 id="description">DESCRIPTION</h2>
<p>fbind is a versatile mounting utility for folders, disk images, LUKS/LUKS2 encrypted volumes, regular partitions and more.</p>
<hr>
<h2 id="license">LICENSE</h2>
<p>Copyright (C) 2017-2021, VR25 @ xda-developers</p>
<p>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.</p>
<p>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.</p>
<p>You should have received a copy of the GNU General Public License
along with this program. If not, see <a href="https://www.gnu.org/licenses/">https://www.gnu.org/licenses/</a>.</p>
<hr>
<h2 id="disclaimer">DISCLAIMER</h2>
<p>Always read/reread this reference prior to installing/upgrading this software.</p>
<p>While no cats have been harmed, the author assumes no responsibility for anything that might break due to the use/misuse of it.</p>
<p>To prevent fraud, do NOT mirror any link associated with this project; do NOT share flashabe zips! Share official links instead.</p>
<hr>
<h2 id="warning">WARNING</h2>
<p>fbind uses <code>fsck</code>, <code>mount</code>, <code>umount</code> and other low level programs that may cause data corruption/loss.
The author assumes no responsibility under anything that might break due to the use/misuse of this software.
By choosing to use/misuse it, you agree to do so at your own risk!</p>
<hr>
<h2 id="pre-requisites">PRE-REQUISITES</h2>
<ul>
<li>Android or Android-based OS rooted with <a href="https://github.com/topjohnwu/Magisk">Magisk</a></li>
<li><a href="https://forum.xda-developers.com/showpost.php?p=82561353&postcount=207">cryptsetup</a> (for encryption, optional)</li>
<li>Terminal emulator (or adb shell) and/or text editor</li>
</ul>
<p>Note: executables such as <code>cryptsetup</code> can be placed in <code>/data/adb/vr25/bin/</code> (with proper permissions) instead of being installed system-wide.</p>
<hr>
<h2 id="config-syntax">CONFIG SYNTAX</h2>
<p><code>bind_mount <target> <mount point></code> Generic Bind-mount</p>
<p>e.g., bind_mount $extsd/loop_device/app_data/spotify /data/data/com.spotify.music</p>
<hr>
<p><code>extsd_path <path></code> Use <code>path</code> as extsd.</p>
<p>e.g., extsd_path /mnt/mmcblk1p2</p>
<hr>
<p><code>from_to <source> <dest></code> Wrapper for <code>bind_mount <$extsd/[path]> <$intsd/[path]></code></p>
<p>e.g., from_to WhatsApp .WhatsApp</p>
<hr>
<p><code>int_extf <path></code> Bind-mount the entire user 0 (internal) storage to <code>$extsd/<path></code> (implies obb). If <code><path></code> is not supplied, <code>.fbind</code> is used.</p>
<p>e.g., int_extf .external_storage</p>
<hr>
<p><code>intsd_path <path></code> Use <code>path</code> as <code>intsd</code>.</p>
<p>e.g., intsd_path /storage/emulated/0</p>
<hr>
<p><code>loop <disk image> <mount point></code> Mount a disk image, a.k.a., loop device.
<code>fsck -fy</code> (adaptive) is implied.</p>
<p>e.g., loop $extsd/loop.img $intsd/loop</p>
<hr>
<p><code>noAutoMount</code> Disable on boot auto-mount.</p>
<p><code>obb</code> Wrapper for <code>bind_mount $extobb $obb</code></p>
<hr>
<p><code>obbf <package name></code> Wrapper for <code>bind_mount $extobb/<package name> $obb/<package name></code></p>
<p>e.g., obbf com.mygame.greatgame</p>
<hr>
<p><code>part [-o <mount option...>] <[block device[--L[,password]]]> <mount point> ["fsck <option...>"]</code> Auto-mount a partition.
The <code>--L</code> flag is for LUKS/2 volume, opened manually by running any <code>fbind</code> command.
The filesystem is automatically detected.
The defaut mount options are <code>rw</code> and <code>noatime</code>.
<code>e2fsck -fy</code> is always used for supported filesystems.</p>
<p>e.g.,</p>
<pre><code>part /dev/block/mmcblk1p1 /mnt/_sdcard
part -o nodev,noexec,nosuid /dev/block/mmcblk1p1 /mnt/_sdcard
</code></pre>
<hr>
<p><code>permissive</code> Set SELinux mode to permissive.</p>
<hr>
<p><code>prefix=<path></code> Sets emulated storage path prefix (excluding emulated/*).</p>
<p>e.g., prefix=/mnt/runtime/full</p>
<p>An alternative to modifying the config is running <code>prefix=/mnt/runtime/full fbind --remount</code></p>
<hr>
<p><code>remove <target></code>>Auto-remove stubborn/unwanted file/folder from $intsd & $extsd.</p>
<p>e.g., remove Android/data/com.facebook.orca</p>
<hr>
<p><code>target <path></code> Wrapper for <code>bind_mount <$extsd/[path]> <$intsd/[same path]></code></p>
<p>e.g., target Android/data/com.google.android.youtube</p>
<hr>
<h2 id="config-examples">CONFIG EXAMPLES</h2>
<pre><code><code><div># All OBBs to $extsd/Android/obb/
obb
# Select OBBs to $extsd/Android/obb/
obbf com.somegame.greatgame
# $intsd/target/ to $extsd/sameTarget/
# For non-media folders only
target TitaniumBackup
# $intsd/someFolder/ to $extsd/.someFolder/
# Prevents duplicate media
from_to DCIM .fbind/DCIM
from_to Pictures .fbind/Pictures
from_to WhatsApp .fbind/WhatsApp
# Multiuser -- user11/someFolder/ to $extsd/someFolder/
bind_mount $extsd/someFolder ${intsd/%0/11}/someFolder
# Mount a partition and use it as $extsd
part /dev/block/mmcblk1p2 /mnt/p2
extsd_path=/mnt/p2
</div></code></code></pre>
<h2 id="terminal-commands">TERMINAL COMMANDS</h2>
<pre><code><code><div>Usage:
fbind (wizard)
fbind [option...] [argument...]
-a|--auto-mount
Toggle auto-mount on boot (default: enabled).
-b|--bind-mount <target> <mount point>
Bind-mount folders not listed in config.txt.
SDcarsFS read and write runtime paths are handled automatically.
Missing directories are created accordingly.
e.g., fbind -b /data/someFolder /data/mountHere
-c|--config [editor] [option...]
Open config.txt w/ [editor] [option...] (default: vim|vi|nano).
e.g., fbind -c nano -l
-C|--cryptsetup [option...] [argument...]
Run cryptsetup [option...] [argument...].
-f|--fuse
Toggle FUSE usage for emulated storage (default: off).
-h|--help
List all commands.
-l|--log [editor] [option...]
Open service.log w/ [editor] [option...] (default: more|vim|vi|nano).
e.g., fbind -l
-m|--mount [egrep regex]
Bind-mount matched or all (no arg).
e.g., fbind -m "Whats|Downl|part"
-M|--move [ext. regex]
Move matched or all (no args) to external storage.
Only unmounted folders are affected.
e.g., fbind -M "Download|obb"
-Mm [egrep regex]
Same as "fbind -M [arg] && fbind -m [arg]"
e.g., fbind -Mm
-r|--readme
Open README.md w/ [editor] [option...] (default: more|vim|vi|nano).
-R|--remove [target]
Remove stubborn/unwanted file/folder from \$intsd and \$extsd.
By default, all "remove" lines from config are included.
e.g., fbind -R Android/data/com.facebook.orca
-t|--test-prefixes
Test internal storage prefixes (views) and automatically update the config.
-u|--unmount [mount point or egrep regex]
Unmount matched or all (no arg).
This works for regular bind-mounts, SDcardFS bind-mounts, regular partitions, loop devices and LUKS/LUKS2 encrypted volumes.
Unmounting "all at once" (no arg) does not affect partitions nor loop devices.
These must be unmounted with a regex argument.
For unmounting folders bound with the --bind-mount option, the mount points must be supplied, since those are not in config.txt.
e.g., fbind -u "loop|part|Downl"
-um|--remount [egrep regex]
Remount matched or all (no arg).
e.g., fbind -um "Download|obb"
-v|--version
Print version code (integer)
</div></code></code></pre>
<hr>
<h2 id="notes">NOTES</h2>
<ul>
<li>
<p>Recent Magisk versions disable all modules when the system boots in safe mode.
Keep this in mind, just in case you face a bootloop - although, in most cases, fbind will automatically revert problematic changes.</p>
</li>
<li>
<p>If you find terminal overwhelming, just run <code>fbind</code> and follow the wizard.</p>
</li>
<li>
<p>Always enforce Unix line endings (LF) when editing config.txt.
NEVER use Windows Notepad for that!</p>
</li>
<li>
<p>Available free space in internal storage may be misreported.</p>
</li>
<li>
<p>[Some] file managers may show multiple SDcard/storage locations.</p>
</li>
<li>
<p>[FUSE] Some users may need to set <code>intsd_path /storage/emulated/0</code> (default is /data/media/0).</p>
</li>
<li>
<p>If you stumble upon inaccessible folders or read-only access, try forcing FUSE (fbind -f) usage for emulated storage.
If your system does not support FUSE, it may get into a bootloop.
If that happens, fbind will revert the change automatically on the next boot attempt.
To revert it manually, either run <code>fbind -f</code> again or remove <code>/data/adb/modules/fbind/system.prop</code> to <code>FUSE.prop</code> and remove <code>/data/adb/vr25/fbind-data/.FUSE</code>.</p>
</li>
<li>
<p>Logs are stored at <code>/data/adb/vr25/fbind-data/logs/</code>.</p>
</li>
<li>
<p>[SDcardFS] Remounting /mnt/runtime/write/... may cause a system reboot.
When this happens, fbind learns to skip it.
However, if the system reboots for a reason other than this, fbind will mistakenly create <code>/data/adb/vr25/fbind-data/.noWriteRemount</code>.
If you stumble across broken bind mounts, remove that file and remount all folders.
To do that in one shot, run <code>rm /data/adb/vr25/fbind-data/.noWriteRemount; fbind -um</code>.</p>
</li>
<li>
<p>Rebooting is not required after installing/upgrading.
If <code>/sbin</code> is missing (many Android 11 based systems lack it), use the <code>/dev/.vr25/fbind/fbind</code> executable until you reboot - e.g., <code>/dev/.vr25/fbind/fbind -m</code>.</p>
</li>
</ul>
<hr>
<h2 id="links">LINKS</h2>
<ul>
<li><a href="https://app.airtm.com/send-or-request/send">Donate - Airtm, username: ivandro863auzqg</a></li>
<li><a href="https://liberapay.com/vr25">Donate - Liberapay</a></li>
<li><a href="https://patreon.com/vr25">Donate - Patreon</a></li>
<li><a href="https://www.paypal.com/cgi-bin/webscr?cmd=_donations&[email protected]&lc=US&item_name=VR25+is+creating+free+and+open+source+software.+Donate+to+suppport+their+work.&no_note=0&cn=&currency_code=USD&bn=PP-DonationsBF:btn_donateCC_LG.gif:NonHosted">Donate - PayPal or Credit/Debit Card</a></li>
<li><a href="https://fb.me/vr25xda">Facebook Page</a></li>
<li><a href="https://t.me/vr25_xda">Telegram Channel</a></li>
<li><a href="https://t.me/fbind_group">Telegram Group</a></li>
<li><a href="https://t.me/vr25xda">Telegram Profile</a></li>
<li><a href="https://github.com/vr-25/fbind">Upstream Repository</a></li>
<li><a href="https://forum.xda-developers.com/apps/magisk/module-magic-folder-binder-t3621814">XDA Thread</a></li>
</ul>
<hr>
<h2 id="latest-changes">LATEST CHANGES</h2>
<p>v2021.12.2 (202112020)</p>
<ul>
<li>Enhanced flashable zip generator;</li>
<li>Implemented <code>losetup</code> wrapper for greater compatibility;</li>
<li>Improved partition and image file mount logics;</li>
<li>Preliminary work on the <em>appdata</em> binding wizard;</li>
<li>Reordered emulated storage prefix fallbacks to cover another Android 11+ quirk.</li>
</ul>
<p>v2021.12.2.1 (202112021)</p>
<ul>
<li>Auto-mount hotfix</li>
</ul>
<p>v2021.12.6 (202112060)</p>
<ul>
<li>Added TOC to readme;</li>
<li>General optimizations;</li>
<li>Improved Android 11+ support.</li>
</ul>
</body>
</html>