Support sleep/wake and standby/wake or ssh connection cut or aid the situation with auto unmount/remount for remote filesystems

[porg]

Reproduction 1

1. Mount remote filesystem via macFUSE — In my case sshfs.
2. Put Mac to sleep — In my case via System Menu (Apple Symbol) > Sleep
3. Wake it shortly later (8min) — I can confirm it indeed slept with pmset -g log

2022-05-12 18:26:00 +0200 Sleep                 Entering Sleep state due to 'Software Sleep pid=163': Using AC (Charge:100%) 504 secs  
2022-05-12 18:34:24 +0200 Wake                  Wake from Normal Sleep [CDNVA] : due to XHC1/HID Activity Using AC (Charge:100%)

• Expected: You can continue browsing the remote webspace in Finder or in Terminal.
• Actual: It works that way.

Reproduction 2

• Ad 3) Sleep longer (hours) And then wake.
• Actual: My Mac is only half responsive. Most apps still react. But Finder hangs. After 2-3min or so (a timeout?) the sshfs network volume disappears in the Finder and Finder is fully responsive again.

Another fact: macFUSE does not publish any "stay awake assertions"

as other similar background processes do which do not or can not support sleep

$ pmset -g assertions

Assertion status system-wide:
   BackgroundTask                 0
   ApplePushServiceTask           0
   UserIsActive                   1
   PreventUserIdleDisplaySleep    0
   PreventSystemSleep             0
   ExternalMedia                  1
   PreventUserIdleSystemSleep     0
   NetworkClientActive            0
Listed by owning process:
   pid 101(powerd): [0x0000002100088002] 01:09:03 ExternalMedia named: "com.apple.powermanagement.externalmediamounted"  
   pid 161(WindowServer): [0x0000006800098161] 00:00:00 UserIsActive named: "com.apple.iohideventsystem.queue.tickle serviceID:10000035c name:AppleEmbeddedKeyboa product:Apple Internal Keyb eventType:3"  
	Timeout will fire in 240 secs Action=TimeoutActionRelease
No kernel assertions.
Idle sleep preventers: IODisplayWrangler

• No entry by macFUSE of SSHFS.

Proposed fixes

Sorted by most desired first:

1. macFUSE seamlessly supports to wake from sleep or standby.
2. If that is technically not possible

• a) It behaves macOS standard compliant: As long as a network volume is mounted it publishes an assertion to the OS to stay awake in the correct assertion category.
• b) offers a mechanism to automatically unmount on sleep and remount on wake.

[porg]

Related issues:

• Fuse sshfs blocks standby (Visual Studio Code?) sshfs#137
• Keeps system from suspending sshfs#279

[bsbernd]

Unrelated to libfuse - in your case I would ask Apple about a solution.

[porg]

So from the design of libfuse and any of its networking plugins like sshfs or curlftpfs a permanent TCP/IP connection is established which should also outlive sleep/wake events?

[bsbernd]

I don't know anything about OSX, I'm not even sure if you are looking at the right project. A colleague told me that libfuse does not even compile, when I asked to test compile my branch on MacOS. The compilation errors pointed to https://github.com/osxfuse

On linux a recent workaround patch pointed to this patch https://linux-kernel.vger.kernel.narkive.com/UeBWfN1V/patch-fuse-make-fuse-daemon-frozen-along-with-kernel-threads
See the commit message for details.

[porg]

Yes, I think I am wrong here.
I came from https://github.com/macfuse/library which in Readme.md states:

Please report any bugs on the GitHub issue tracker at https://github.com/libfuse/main/issues

I now saw that there is also the repo https://github.com/osxfuse/osxfuse and there issues can be created and first search already yielded related issues.

So I am closing here.