GNU bug report logs - #75304
29.4; sshfs fails to mount when run by eshell and -f isn't passed

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Richard Sent <richard <at> freakingpenguin.com>
To: bug-gnu-emacs <at> gnu.org
Subject: 29.4; sshfs fails to mount when run by eshell and -f isn't passed
Date: Thu, 02 Jan 2025 16:37:37 -0500

Hi all,

When sshfs is invoked by eshell and allowed to daemonize (default),
sshfs fails to mount the desired target directory. This seems to be
caused by a SIGTERM signal being sent after sshfs daemonizes and enters
the main fuse loop. (The return value of fuse_loop_mt is 15, which
matches the return value when the process actually receives SIGTERM.
Confirmed both by testing and documentation at [1].)

If I set process-connection-type to nil, sshfs works as expected. This
isn't ideal because it can cause breakage elsewhere (e.g. ripgrep).

This issue sounds similar to a previous one with xdg-open [2].
However, xdg-open's behavior seems to have been fixed in Emacs 29 ($
xdg-open file.txt works on my machine), while this bug is present on 29.

For what it's worth, the problem also occurs when sshfs is invoked by a
wrapper script and not eshell directly.

Tested in -Q.

[1]: https://libfuse.github.io/doxygen/fuse-3_810_84_2include_2fuse__lowlevel_8h.html#a5f1e538aa3287e251afbe985438c4249
[2]: https://lists.gnu.org/archive/html/bug-gnu-emacs/2022-11/msg01768.html


In GNU Emacs 29.4 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.24.41,
cairo version 1.18.0)
Windowing system distributor 'The X.Org Foundation', version 11.0.12101014
System Description: Guix System

Configured using:
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-- 
Take it easy,
Richard Sent
Making my computer weirder one commit at a time.

Message #8 received at 75304 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Richard Sent <richard <at> freakingpenguin.com>,
 Jim Porter <jporterbugs <at> gmail.com>
Cc: 75304 <at> debbugs.gnu.org
Subject: Re: bug#75304: 29.4;
 sshfs fails to mount when run by eshell and -f isn't passed
Date: Sat, 11 Jan 2025 13:14:58 +0200

> From: Richard Sent <richard <at> freakingpenguin.com>
> Date: Thu, 02 Jan 2025 16:37:37 -0500
> 
> Hi all,
> 
> When sshfs is invoked by eshell and allowed to daemonize (default),
> sshfs fails to mount the desired target directory. This seems to be
> caused by a SIGTERM signal being sent after sshfs daemonizes and enters
> the main fuse loop. (The return value of fuse_loop_mt is 15, which
> matches the return value when the process actually receives SIGTERM.
> Confirmed both by testing and documentation at [1].)
> 
> If I set process-connection-type to nil, sshfs works as expected. This
> isn't ideal because it can cause breakage elsewhere (e.g. ripgrep).
> 
> This issue sounds similar to a previous one with xdg-open [2].
> However, xdg-open's behavior seems to have been fixed in Emacs 29 ($
> xdg-open file.txt works on my machine), while this bug is present on 29.
> 
> For what it's worth, the problem also occurs when sshfs is invoked by a
> wrapper script and not eshell directly.
> 
> Tested in -Q.
> 
> [1]: https://libfuse.github.io/doxygen/fuse-3_810_84_2include_2fuse__lowlevel_8h.html#a5f1e538aa3287e251afbe985438c4249
> [2]: https://lists.gnu.org/archive/html/bug-gnu-emacs/2022-11/msg01768.html

Jim, did you see this report?  Any comments or suggestions?

Message #11 received at 75304 <at> debbugs.gnu.org (full text, mbox):

From: Jim Porter <jporterbugs <at> gmail.com>
To: Richard Sent <richard <at> freakingpenguin.com>, 75304 <at> debbugs.gnu.org
Subject: Re: bug#75304: 29.4; sshfs fails to mount when run by eshell and -f
 isn't passed
Date: Sat, 11 Jan 2025 11:32:21 -0800

merge 56013 75304
thanks

On 1/2/2025 1:37 PM, Richard Sent wrote:
> If I set process-connection-type to nil, sshfs works as expected. This
> isn't ideal because it can cause breakage elsewhere (e.g. ripgrep).

If that's the case, then this is just bug#56013, which you linked to. 
That's not fixed yet, and there's not a great general solution for it 
(at least not one without extensive changes to process.c, which I'd 
rather avoid). A workaround in Eshell would be to change 
process-connection-type based on the program name, but in my tests that 
interacts badly with shell scripts, so would require a bit more work to 
support things like xdg-open.

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