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Message-ID: <a9b91931-9827-4044-b339-9c8fc4527f80@maxrnd.com>
Date: Fri, 2 May 2025 22:15:17 -0700
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User-Agent: Mozilla Thunderbird
Subject: Re: fstab and sshfs
To: cygwin AT cygwin DOT com
References: <e833d67e-ed2f-43a8-b32d-0497383a2498 AT holgerdanske DOT com>
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From: Mark Geisert via Cygwin <cygwin AT cygwin DOT com>
Reply-To: Mark Geisert <mark AT maxrnd DOT com>
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Hi David,

On 5/2/2025 7:22 PM, David Christensen via Cygwin wrote:
> cygwin:
> 
> I am attempting to mount a directory from a FreeBSD computer:
> 
> 2025-05-02 19:16:01 admin AT dq67sw ~
> $ ssh dpchrist AT f5 freebsd-version -kru
> 13.4-RELEASE-p3
> 13.4-RELEASE-p3
> 13.4-RELEASE-p5
> 
> 2025-05-02 18:51:15 admin AT dq67sw ~
> $ ssh dpchrist AT f5 uname -a
> FreeBSD f5.tracy.holgerdanske.com 13.4-RELEASE-p3 FreeBSD 13.4-RELEASE- 
> p3 GENERIC amd64
> 
> 2025-05-02 19:08:29 admin AT dq67sw ~
> $ ssh dpchrist AT f5 ls -ld /var/local/samba/dpchrist
> drwxr-xr-x  104 dpchrist  dpchrist  105 Apr 30 00:45 /var/local/samba/ 
> dpchrist
> 
> 
> Onto a Windows 10 Home computer:
> 
> 2025-05-02 18:53:47 admin AT dq67sw ~
> $ systeminfo | grep OS
> OS Name:                   Microsoft Windows 10 Home
> OS Version:                10.0.19045 N/A Build 19045
> OS Manufacturer:           Microsoft Corporation
> OS Configuration:          Standalone Workstation
> OS Build Type:             Multiprocessor Free
> BIOS Version:              Intel Corp. SWQ6710H.86A.0068.2017.0601.1423, 
> 6/1/2017
> 
> 2025-05-02 19:14:14 admin AT dq67sw ~
> $ ls -al /samba
> total 4
> drwxr-xr-x 1 admin None           0 May  2 19:05 .
> drwxr-xr-x 1 admin Administrators 0 Apr 28 12:03 ..
> 
> 
> Using WinFsp and Cygwin:
> 
> 2025-05-02 18:59:11 admin AT dq67sw ~
> $ /cygdrive/c/Program\ Files\ \(x86\)/WinFsp/bin/fsptool-x64.exe ver
> 2.0 (SxS=20250430T013040Z)
> 
> 2025-05-02 18:53:54 admin AT dq67sw ~
> $ cygcheck -c cygwin
> Cygwin Package Information
> Package              Version    Status
> cygwin               3.6.1-1        OK
> 
> 2025-05-02 18:55:15 admin AT dq67sw ~
> $ cygcheck -c sshfs
> Cygwin Package Information
> Package              Version    Status
> sshfs                3.7.2-2        OK
> 
> 
> I can mount and unmount the directory onto Windows from a Cygwin64 
> Terminal:
> 
> 2025-05-02 18:59:36 admin AT dq67sw ~
> $ sshfs dpchrist AT f5:/var/local/samba/dpchrist /samba/dpchrist -o 
> uid=197609 -o gid=197121
> 
> 2025-05-02 19:03:16 admin AT dq67sw ~
> $ ls /samba/dpchrist | grep ^[A-Z]
> David_s_iPhone
> Downloads
> Movies
> Music
> Music-leftovers
> Pictures
> Television
> Videos
> 
> 2025-05-02 19:03:21 admin AT dq67sw ~
> $ fusermount3 -u /samba/dpchrist
> fusermount3: /samba/dpchrist unmounted
> 
> 2025-05-02 19:05:08 admin AT dq67sw ~
> $ ls /samba
> 
> 
> RTFM sshfs(1) states:
> 
> MOUNTING FROM /ETC/FSTAB
>         To mount an SSHFS filesystem from /etc/fstab, simply use sshfs 
> as the file system type. (For backwards compatibility, you may also use 
> fuse.sshfs).
> 
> 
> But creating an /etc/fstab entry and using mount does not work:
> 
> 2025-05-02 19:07:12 admin AT dq67sw ~
> $ grep dpchrist /etc/fstab
> dpchrist AT samba:/var/local/samba/dpchrist /samba/dpchrist sshfs 
> noauto,uid=197609,gid=197121 0 0
> 
> 2025-05-02 19:07:15 admin AT dq67sw ~
> $ mount /samba/dpchrist
> mount: can't find /samba/dpchrist in /etc/fstab or in /etc/fstab.d/$USER
> 
> 
> Comments or suggestions?

Unfortunately Cygwin hasn't integrated FUSE filesystem types into 
'mount' and /etc/fstab.  This is why FUSE mounts are recorded in 
/var/run/fuse.mounts rather than in the usual mount table, for example.

The sshfs man page is correct for Linux and other OSs but less so for 
Cygwin.  On Cygwin any FUSE mount has a managing process; these are 
sshfs, and when available, ftpfs, memfs, etc.  They do the actual mount 
and then hang around in background to support operations on the mounted 
filesystem.  The Cygwin DLL doesn't know about these filesystems.

If your goal is to have "permanently" FUSE-mounted filesystems, about 
all I can suggest is to run sshfs from your first Cygwin shell after a 
system boot.
HTH,

..mark

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