ERR=Bad file descriptor when running apctest

Status changed to 'Confirmed' because the bug affects multiple users.

Hi there,

Thought I would add to this, I too am having this issue

APC : 001,018,0450
DATE : 2016-08-06 23:01:35 +1000
HOSTNAME : ubuntuserver
VERSION : 3.14.12 (29 March 2014) debian
UPSNAME : serverups
CABLE : USB Cable
DRIVER : USB UPS Driver
UPSMODE : Stand Alone
STARTTIME: 2016-08-06 22:46:36 +1000
STATUS : COMMLOST
MBATTCHG : 5 Percent
MINTIMEL : 3 Minutes
MAXTIME : 0 Seconds
NUMXFERS : 0
TONBATT : 0 Seconds
CUMONBATT: 0 Seconds
XOFFBATT : N/A
STATFLAG : 0x05000100
END APC : 2016-08-06 23:40:02 +1000

Hi!
I got the same bug on the same sysstem (:

http://www.apcupsd.org/manual/manual.html#verifying-device-detection-and-driver

It`s looks like that the problem in usbfs

In the Linux kernel usbfs was completely removed in 3.5 so it is completely missing since Ubuntu 12.10...(

Interestingly, on my xenial system (now running 4.4.0-36):
bladernr@galactica:~$ ll /sys/bus/usb/drivers
total 0
drwxr-xr-x 2 root root 0 Sep 7 10:20 hub
drwxr-xr-x 2 root root 0 Sep 7 10:20 uas
drwxr-xr-x 2 root root 0 Sep 7 10:20 usb
drwxr-xr-x 2 root root 0 Sep 7 10:21 usbfs
drwxr-xr-x 2 root root 0 Sep 7 10:20 usbhid
drwxr-xr-x 2 root root 0 Sep 7 10:20 usb-storage
bladernr@galactica:~$ ll /sys/bus/usb/drivers/usbfs/
total 0
--w------- 1 root root 4096 Sep 7 10:21 bind
lrwxrwxrwx 1 root root 0 Sep 7 10:21 module -> ../../../../module/usbcore
-rw-r--r-- 1 root root 4096 Sep 7 10:21 new_id
-rw-r--r-- 1 root root 4096 Sep 7 10:21 remove_id
--w------- 1 root root 4096 Sep 7 10:21 uevent
--w------- 1 root root 4096 Sep 7 10:21 unbind

I looked at apcupsd.com and there is a newer version of the daemon and tools out:
https://sourceforge.net/projects/apcupsd/files/apcupsd%20-%20Stable/3.14.14/

and after compiling and installing them, they appear to work without this issue:
bladernr@galactica:~/development/apcupsd-3.14.14$ sudo /sbin/apctest

2016-09-07 10:41:19 apctest 3.14.14 (31 May 2016) debian
Checking configuration ...
sharenet.type = Network & ShareUPS Disabled
cable.type = USB Cable
mode.type = USB UPS Driver
Setting up the port ...
Doing prep_device() ...

You are using a USB cable type, so I'm entering USB test mode
Hello, this is the apcupsd Cable Test program.
This part of apctest is for testing USB UPSes.

Getting UPS capabilities...SUCCESS

Please select the function you want to perform.

1) Test kill UPS power
2) Perform self-test
3) Read last self-test result
4) View/Change battery date
5) View manufacturing date
6) View/Change alarm behavior
7) View/Change sensitivity
8) View/Change low transfer voltage
9) View/Change high transfer voltage
10) Perform battery calibration
11) Test alarm
12) View/Change self-test interval
 Q) Quit

Select function number:

So looks like the resolution here is to update apcupsd in Ubuntu to the latest version

Also looks like that version is currently in Yakkety... so just needs an SRU into Xenial.

Tnx, Jeff Lane (bladernr)!
newer version (3.14.14) https://sourceforge.net/projects/apcupsd/files/apcupsd%20-%20Stable/3.14.14/ of apcupsd works without this issue.
During compiling it was needed to add option --enanable-usb to ./configure

Why is this still an issue?

I am having the same issue
on ubuntu 16.04 and ubuntu 18.04
running 3-13.12 apc