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Charles Lepple

2015-Jun-09 03:20 UTC

[Nut-upsdev] libusb_get_string: invalid argument

On Jun 8, 2015, at 8:23 PM, Greg Hersch <hersch.greg at gmail.com> wrote:
> Hi Charles. I patched, reconfigured, remake'd, remake install'd -
but
> no change. however, some more likely helpful information below for
> you. Thank you
Odd. Are you sure that the new version of usbhid-ups got installed to the same
path you are running? Also, there is no protection against running two drivers
if one is in debug mode. Please check that usbhid-ups is not still running in
the background from an earlier run.

You can also add some text to the version string in drivers/tripplite-hid.c - it
will show up as "Using subdriver: TrippLite HID 0.81" in the stock
version.
> On Mon, Jun 8, 2015 at 12:34 PM, Greg Hersch <hersch.greg at
gmail.com> wrote:
>> 
>> 
>> On Sun, 7 Jun 2015, Charles Lepple wrote:
>> 
>>> [please use reply-all to include the list, as the list does not
override
>>> the Reply-To header.]
>>> 
>>> On Jun 7, 2015, at 5:02 PM, Greg Hersch <hersch.greg at
gmail.com> wrote:
>>> 
>>>> Here is the driver debug log. If I just let it run, it pops up
with
>>>> libusb_get_string_invalid argument over and over again, mixed
in the
>>>> debug output. seems to be several issues reported in the log,
but they
>>>> arent easily interpreted.
>>> 
>>> 
>>> Does the libusb_get_string error occur only every 30 seconds or so?
>> 
>> 
>> Yes - thats correct. perhaps more like every 15 sec.
> 
> I was incorrect. they occur every 6 seconds. and there are two of them
> each time.
> hopefully that narrows it down!
Unfortunately, no. I was thinking either every 30 seconds or every two seconds,
and I'm not sure why they would occur two at a time every six seconds.

I'm not sure if we have enough log messages in the code already. If you can
use GDB, you could do something like the following:

gdb /usr/local/ups/bin/usbhid-ups
...
(gdb) break libusb_get_string
(gdb) run -DD -a tripplite
...
(gdb) c
...
(gdb) bt

Keep pressing "c" until you get past the initial detection, which
probably succeeds.

That last line should print a backtrace showing which function called the
offending function.
>>> 
>>> Also, I would be interested in the output of "lsusb -vvv -d
09ae:" for
>>> your UPS.
> 
> Here it is:
> Thanks. Doesn't look too different than what we've seen before, so
I'm optimistic.

-- 
Charles Lepple
clepple at gmail

Greg Hersch

2015-Jun-09 20:55 UTC

head link

[Nut-upsdev] libusb_get_string: invalid argument

On Mon, Jun 8, 2015 at 11:20 PM, Charles Lepple <clepple at gmail.com>
wrote:> On Jun 8, 2015, at 8:23 PM, Greg Hersch <hersch.greg at gmail.com>
wrote:
>
>> Hi Charles. I patched, reconfigured, remake'd, remake install'd
- but
>> no change. however, some more likely helpful information below for
>> you. Thank you
>
> Odd. Are you sure that the new version of usbhid-ups got installed to the
same path you are running? Also, there is no protection against running two
drivers if one is in debug mode. Please check that usbhid-ups is not still
running in the background from an earlier run.
>
> You can also add some text to the version string in drivers/tripplite-hid.c
- it will show up as "Using subdriver: TrippLite HID 0.81" in the
stock version.
I have done this and verified - here is my output from
/usr/local/ups/sbin/upsdrvctl start:. You can see the "MODIFIED" tag i
placed in the code

Network UPS Tools - UPS driver controller 2.7.3
Network UPS Tools - Generic HID driver 0.39 (2.7.3)
USB communication driver 0.32
Using subdriver: TrippLite HID 0.81_MODIFIED
>
>> On Mon, Jun 8, 2015 at 12:34 PM, Greg Hersch <hersch.greg at
gmail.com> wrote:
>>>
>>>
>>> On Sun, 7 Jun 2015, Charles Lepple wrote:
>>>
>>>> [please use reply-all to include the list, as the list does not
override
>>>> the Reply-To header.]
>>>>
>>>> On Jun 7, 2015, at 5:02 PM, Greg Hersch <hersch.greg at
gmail.com> wrote:
>>>>
>>>>> Here is the driver debug log. If I just let it run, it pops
up with
>>>>> libusb_get_string_invalid argument over and over again,
mixed in the
>>>>> debug output. seems to be several issues reported in the
log, but they
>>>>> arent easily interpreted.
>>>>
>>>>
>>>> Does the libusb_get_string error occur only every 30 seconds or
so?
>>>
>>>
>>> Yes - thats correct. perhaps more like every 15 sec.
>>
>> I was incorrect. they occur every 6 seconds. and there are two of them
>> each time.
>> hopefully that narrows it down!
>
> Unfortunately, no. I was thinking either every 30 seconds or every two
seconds, and I'm not sure why they would occur two at a time every six
seconds.
>
> I'm not sure if we have enough log messages in the code already. If you
can use GDB, you could do something like the following:
>
> gdb /usr/local/ups/bin/usbhid-ups
> ...
> (gdb) break libusb_get_string
> (gdb) run -DD -a tripplite
> ...
> (gdb) c
> ...
> (gdb) bt
>
> Keep pressing "c" until you get past the initial detection, which
probably succeeds.
>
> That last line should print a backtrace showing which function called the
offending function.
>
Okay - here is my attempt at doing that. i did a backtrace after i saw
the invalid argument line come up. let me know if thats right.

>~ % sudo gdb /usr/local/ups/bin/usbhid-upsGNU gdb (GDB) 7.9.1
Copyright (C) 2015 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later
<http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show
copying"
and "show warranty" for details.
This GDB was configured as "armv5tel-unknown-linux-gnueabi".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
<http://www.gnu.org/software/gdb/documentation/>.
For help, type "help".
Type "apropos word" to search for commands related to
"word"...
Reading symbols from /usr/local/ups/bin/usbhid-ups...done.
(gdb)  break libusb_get_string
Breakpoint 1 at 0x16134: file libusb.c, line 496.
(gdb) run -DD -a tripplite
Starting program: /usr/local/ups/bin/usbhid-ups -DD -a tripplite
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/usr/lib/libthread_db.so.1".
Network UPS Tools - Generic HID driver 0.39 (2.7.3)
USB communication driver 0.32
   0.000000     debug level is '2'
   0.066603     upsdrv_initups...
   0.080042     Checking device (09AE/1007) (001/006)
   0.249698     - VendorID: 09ae
   0.250669     - ProductID: 1007
   0.251615     - Manufacturer: Tripp Lite
   0.252487     - Product: TRIPP LITE UPS
   0.253342     - Serial Number: FW-2263 E
   0.254194     - Bus: 001
   0.254709     Trying to match device
   0.255059     Device matches
   0.274850     HID descriptor length 447
   0.752620     Report Descriptor size = 447
   0.753610     Using subdriver: TrippLite HID 0.81_MODIFIED
   0.769401     Path: UPS.PowerSummary.iProduct, Type: Feature,
ReportID: 0x28, Offset: 0, Size: 8, Value: 1
   0.786121     Path: UPS.PowerSummary.iSerialNumber, Type: Feature,
ReportID: 0x29, Offset: 0, Size: 8, Value: 2
   0.802865     Path: UPS.PowerSummary.iManufacturer, Type: Feature,
ReportID: 0x2b, Offset: 0, Size: 8, Value: 3
   0.819524     Path: UPS.PowerSummary.Input.ConfigVoltage, Type:
Feature, ReportID: 0x30, Offset: 0, Size: 8, Value: 120
   0.836279     Path: UPS.PowerSummary.AudibleAlarmControl, Type:
Feature, ReportID: 0x11, Offset: 0, Size: 8, Value: 2
   0.852997     Path: UPS.PowerSummary.iDeviceChemistry, Type:
Feature, ReportID: 0x2a, Offset: 0, Size: 8, Value: 24
   0.869730     Path: UPS.PowerSummary.CapacityMode, Type: Feature,
ReportID: 0x33, Offset: 0, Size: 8, Value: 2
   0.886509     Path: UPS.PowerSummary.RunTimeToEmpty, Type: Input,
ReportID: 0x35, Offset: 0, Size: 16, Value: 1440
   0.886923     Path: UPS.PowerSummary.RunTimeToEmpty, Type: Feature,
ReportID: 0x35, Offset: 0, Size: 16, Value: 1440
   0.903240     Path: UPS.PowerSummary.RemainingCapacity, Type: Input,
ReportID: 0x34, Offset: 0, Size: 8, Value: 100
   0.903393     Path: UPS.PowerSummary.RemainingCapacity, Type:
Feature, ReportID: 0x34, Offset: 0, Size: 8, Value: 100
   0.919985     Path: UPS.PowerSummary.FullChargeCapacity, Type:
Feature, ReportID: 0x37, Offset: 0, Size: 8, Value: 100
   0.936759     Path: UPS.PowerSummary.PresentStatus.ShutdownImminent,
Type: Input, ReportID: 0x32, Offset: 0, Size: 1, Value: 0
   0.936859     Path: UPS.PowerSummary.PresentStatus.TLACPresent,
Type: Input, ReportID: 0x32, Offset: 1, Size: 1, Value: 1
   0.936931     Path: UPS.PowerSummary.PresentStatus.TLCharging, Type:
Input, ReportID: 0x32, Offset: 2, Size: 1, Value: 1
   0.936996     Path: UPS.PowerSummary.PresentStatus.TLDischarging,
Type: Input, ReportID: 0x32, Offset: 3, Size: 1, Value: 0
   0.937062     Path:
UPS.PowerSummary.PresentStatus.TLNeedReplacement, Type: Input,
ReportID: 0x32, Offset: 4, Size: 1, Value: 0
   0.937129     Path: UPS.PowerSummary.PresentStatus.ShutdownImminent,
Type: Feature, ReportID: 0x32, Offset: 0, Size: 1, Value: 0
   0.937199     Path: UPS.PowerSummary.PresentStatus.ACPresent, Type:
Feature, ReportID: 0x32, Offset: 1, Size: 1, Value: 1
   0.937265     Path: UPS.PowerSummary.PresentStatus.Charging, Type:
Feature, ReportID: 0x32, Offset: 2, Size: 1, Value: 1
   0.937334     Path: UPS.PowerSummary.PresentStatus.Discharging,
Type: Feature, ReportID: 0x32, Offset: 3, Size: 1, Value: 0
   0.937401     Path: UPS.PowerSummary.PresentStatus.NeedReplacement,
Type: Feature, ReportID: 0x32, Offset: 4, Size: 1, Value: 0
   0.953533     Path: UPS.BatterySystem.Battery.ConfigVoltage, Type:
Feature, ReportID: 0x04, Offset: 0, Size: 16, Value: 12
   0.970234     Path:
UPS.BatterySystem.Battery.PresentStatus.Charging, Type: Feature,
ReportID: 0x23, Offset: 0, Size: 1, Value: 1
   0.970796     Path:
UPS.BatterySystem.Battery.PresentStatus.Discharging, Type: Feature,
ReportID: 0x23, Offset: 1, Size: 1, Value: 0
   0.970928     Path:
UPS.BatterySystem.Battery.PresentStatus.NeedReplacement, Type:
Feature, ReportID: 0x23, Offset: 2, Size: 1, Value: 0
   0.987027     Path: UPS.BatterySystem.Test, Type: Feature, ReportID:
0x10, Offset: 0, Size: 8, Value: 0
   1.003749     Path: UPS.Flow.ConfigVoltage, Type: Feature, ReportID:
0x01, Offset: 0, Size: 8, Value: 120
   1.020490     Path: UPS.Flow.ConfigFrequency, Type: Feature,
ReportID: 0x02, Offset: 0, Size: 8, Value: 60
   1.037271     Path: UPS.Flow.ConfigApparentPower, Type: Feature,
ReportID: 0x03, Offset: 0, Size: 16, Value: 900
   1.054007     Path: UPS.OutletSystem.Outlet.DelayBeforeShutdown,
Type: Feature, ReportID: 0x15, Offset: 0, Size: 16, Value: 65535
   1.070622     Path: UPS.OutletSystem.Outlet.ffff0091, Type: Feature,
ReportID: 0x51, Offset: 0, Size: 8, Value: 0
   1.087506     Path: UPS.OutletSystem.Outlet.TLWatchdog, Type:
Feature, ReportID: 0x52, Offset: 0, Size: 8, Value: 0
   1.104124     Path: UPS.OutletSystem.Outlet.ffff00c7, Type: Feature,
ReportID: 0xb6, Offset: 0, Size: 8, Value: 1
   1.121003     Path: UPS.TLCustom.[1].CommunicationProtocolVersion,
Type: Feature, ReportID: 0x6c, Offset: 0, Size: 16, Value: 4103
   1.137767     Path: UPS.ffff0015.[1].ffff00c0, Type: Feature,
ReportID: 0x96, Offset: 0, Size: 8, Value: 255
   1.154468     refresh_report_buffer: expected 5 bytes, but got 2 instead
   1.154581     Path: UPS.ffff0015.[1].ffff00d2, Type: Feature,
ReportID: 0xb4, Offset: 0, Size: 32, Value: 255
   1.171262     Path: UPS.ffff0015.[1].ffff00c1, Type: Feature,
ReportID: 0x97, Offset: 0, Size: 16, Value: 255
   1.188284     Path: UPS.ffff0015.[1].ffff00c2, Type: Feature,
ReportID: 0x98, Offset: 0, Size: 8, Value: 255
   1.205022     Path: UPS.ffff0015.[1].ffff00c3, Type: Feature,
ReportID: 0x99, Offset: 0, Size: 16, Value: 255
   1.221761     Path: UPS.ffff0015.[1].ffff00c5, Type: Feature,
ReportID: 0x9b, Offset: 0, Size: 16, Value: 3
   1.230623     libusb_get_report: Value too large for defined data type
   1.231014     Can't retrieve Report c2: Value too large for defined data
type
   1.231393     Path: UPS.ffff0015.[1].ffff00d6, Type: Feature,
ReportID: 0xc2, Offset: 0, Size: 32
   1.238633     libusb_get_report: Value too large for defined data type
   1.238766     Can't retrieve Report 9a: Value too large for defined data
type
   1.239023     Path: UPS.ffff0015.[1].ffff00c4, Type: Feature,
ReportID: 0x9a, Offset: 0, Size: 32
   1.239478     Report descriptor retrieved (Reportlen = 447)
   1.239577     Found HID device
   1.239934     Detected a UPS: Tripp Lite /TRIPP LITE UPS
   1.240468     Path: UPS.PowerSummary.RemainingCapacity, Type:
Feature, ReportID: 0x34, Offset: 0, Size: 8, Value: 100
   1.241196     Path: UPS.PowerSummary.RunTimeToEmpty, Type: Feature,
ReportID: 0x35, Offset: 0, Size: 16, Value: 1440
   1.241629     Path: UPS.BatterySystem.Battery.ConfigVoltage, Type:
Feature, ReportID: 0x04, Offset: 0, Size: 16, Value: 12
   1.242090     Path: UPS.PowerSummary.iDeviceChemistry, Type:
Feature, ReportID: 0x2a, Offset: 0, Size: 8, Value: 24
[New Thread 0x40b51460 (LWP 8120)]

Breakpoint 1, libusb_get_string (udev=0x43110, StringIdx=24,
buf=0x40400 <buf> "", buflen=20) at libusb.c:496
496             if (!udev) {
(gdb) c
Continuing.
  27.433807     Path: UPS.OutletSystem.Outlet.DelayBeforeShutdown,
Type: Feature, ReportID: 0x15, Offset: 0, Size: 16, Value: 65535
  27.450415     Path: UPS.BatterySystem.Test, Type: Feature, ReportID:
0x10, Offset: 0, Size: 8, Value: 0
  27.467292     Path: UPS.PowerSummary.AudibleAlarmControl, Type:
Feature, ReportID: 0x11, Offset: 0, Size: 8, Value: 2
  27.483919     Path: UPS.Flow.ConfigApparentPower, Type: Feature,
ReportID: 0x03, Offset: 0, Size: 16, Value: 900
  27.500786     Path: UPS.OutletSystem.Outlet.TLWatchdog, Type:
Feature, ReportID: 0x52, Offset: 0, Size: 8, Value: 0
  27.517668     Path: UPS.PowerSummary.PresentStatus.ShutdownImminent,
Type: Feature, ReportID: 0x32, Offset: 0, Size: 1, Value: 0
  27.517877     Path: UPS.PowerSummary.PresentStatus.ACPresent, Type:
Feature, ReportID: 0x32, Offset: 1, Size: 1, Value: 1
  27.518369     Path: UPS.PowerSummary.PresentStatus.Charging, Type:
Feature, ReportID: 0x32, Offset: 2, Size: 1, Value: 1
  27.518752     Path: UPS.PowerSummary.PresentStatus.Discharging,
Type: Feature, ReportID: 0x32, Offset: 3, Size: 1, Value: 0
  27.519154     Path: UPS.PowerSummary.PresentStatus.NeedReplacement,
Type: Feature, ReportID: 0x32, Offset: 4, Size: 1, Value: 0
  27.534423     Path: UPS.PowerSummary.Input.ConfigVoltage, Type:
Feature, ReportID: 0x30, Offset: 0, Size: 8, Value: 120
  27.551295     Path: UPS.Flow.ConfigVoltage, Type: Feature, ReportID:
0x01, Offset: 0, Size: 8, Value: 120
  27.568055     Path: UPS.Flow.ConfigFrequency, Type: Feature,
ReportID: 0x02, Offset: 0, Size: 8, Value: 60
  27.568535     Path: UPS.BatterySystem.Test, Type: Feature, ReportID:
0x10, Offset: 0, Size: 8, Value: 0
  27.568978     Path: UPS.BatterySystem.Test, Type: Feature, ReportID:
0x10, Offset: 0, Size: 8, Value: 0
  27.569349     Path: UPS.BatterySystem.Test, Type: Feature, ReportID:
0x10, Offset: 0, Size: 8, Value: 0
  27.569789     Path: UPS.OutletSystem.Outlet.DelayBeforeShutdown,
Type: Feature, ReportID: 0x15, Offset: 0, Size: 16, Value: 65535
  27.569999     Path: UPS.OutletSystem.Outlet.DelayBeforeShutdown,
Type: Feature, ReportID: 0x15, Offset: 0, Size: 16, Value: 65535
  27.570458     Path: UPS.OutletSystem.Outlet.TLWatchdog, Type:
Feature, ReportID: 0x52, Offset: 0, Size: 8, Value: 0
  27.570831     Path: UPS.OutletSystem.Outlet.TLWatchdog, Type:
Feature, ReportID: 0x52, Offset: 0, Size: 8, Value: 0
  27.571228     Path: UPS.PowerSummary.AudibleAlarmControl, Type:
Feature, ReportID: 0x11, Offset: 0, Size: 8, Value: 2
  27.571645     Path: UPS.PowerSummary.AudibleAlarmControl, Type:
Feature, ReportID: 0x11, Offset: 0, Size: 8, Value: 2
  27.572021     Path: UPS.PowerSummary.AudibleAlarmControl, Type:
Feature, ReportID: 0x11, Offset: 0, Size: 8, Value: 2
  27.572224     Path: UPS.PowerSummary.AudibleAlarmControl, Type:
Feature, ReportID: 0x11, Offset: 0, Size: 8, Value: 2
  27.572590     Path: UPS.PowerSummary.AudibleAlarmControl, Type:
Feature, ReportID: 0x11, Offset: 0, Size: 8, Value: 2
  27.572935     find_nut_info: unknown info type: load.on.delay
  27.573263     find_nut_info: unknown info type: load.on.delay
  27.573458     upsdrv_initinfo...
  27.573842     upsdrv_updateinfo...
  27.581201     Got 1 HID objects...
  27.581559     Path: UPS.PowerSummary.RemainingCapacity, Type: Input,
ReportID: 0x34, Offset: 0, Size: 8, Value: 100
  27.581677     Quick update...
  27.582023     Path: UPS.OutletSystem.Outlet.DelayBeforeShutdown,
Type: Feature, ReportID: 0x15, Offset: 0, Size: 16, Value: 65535
  27.582160     Path: UPS.PowerSummary.PresentStatus.ACPresent, Type:
Feature, ReportID: 0x32, Offset: 1, Size: 1, Value: 1
  27.582675     Path: UPS.PowerSummary.PresentStatus.Charging, Type:
Feature, ReportID: 0x32, Offset: 2, Size: 1, Value: 1
  27.583327     Path: UPS.PowerSummary.PresentStatus.Discharging,
Type: Feature, ReportID: 0x32, Offset: 3, Size: 1, Value: 0
  27.584090     dstate_init: sock /var/state/ups/usbhid-ups-tripplite
open on fd 13
  27.584935     upsdrv_updateinfo...
  27.613190     Got 1 HID objects...
  27.613602     Path: UPS.PowerSummary.RunTimeToEmpty, Type: Input,
ReportID: 0x35, Offset: 0, Size: 16, Value: 1440
  27.613931     Quick update...
  27.614057     Path: UPS.OutletSystem.Outlet.DelayBeforeShutdown,
Type: Feature, ReportID: 0x15, Offset: 0, Size: 16, Value: 65535
  27.614467     Path: UPS.PowerSummary.PresentStatus.ACPresent, Type:
Feature, ReportID: 0x32, Offset: 1, Size: 1, Value: 1
  27.614838     Path: UPS.PowerSummary.PresentStatus.Charging, Type:
Feature, ReportID: 0x32, Offset: 2, Size: 1, Value: 1
  27.615222     Path: UPS.PowerSummary.PresentStatus.Discharging,
Type: Feature, ReportID: 0x32, Offset: 3, Size: 1, Value: 0
  29.585702     upsdrv_updateinfo...
  29.597279     Got 5 HID objects...
  29.597393     Path: UPS.PowerSummary.PresentStatus.ShutdownImminent,
Type: Input, ReportID: 0x32, Offset: 0, Size: 1, Value: 0
  29.597484     Path: UPS.PowerSummary.PresentStatus.TLACPresent,
Type: Input, ReportID: 0x32, Offset: 1, Size: 1, Value: 1

Breakpoint 1, libusb_get_string (udev=0x43110, StringIdx=1,
buf=0x40204 <buf> "", buflen=20) at libusb.c:496
496             if (!udev) {
(gdb) c
Continuing.
  41.813239     Path: UPS.PowerSummary.PresentStatus.TLCharging, Type:
Input, ReportID: 0x32, Offset: 2, Size: 1, Value: 1

Breakpoint 1, libusb_get_string (udev=0x43110, StringIdx=1,
buf=0x40204 <buf> "TRIPP LITE UPS ", buflen=20) at libusb.c:496
496             if (!udev) {
(gdb) c
Continuing.
  48.812952     Path: UPS.PowerSummary.PresentStatus.TLDischarging,
Type: Input, ReportID: 0x32, Offset: 3, Size: 1, Value: 0

Breakpoint 1, libusb_get_string (udev=0x43110, StringIdx=0,
buf=0x40204 <buf> "TRIPP LITE UPS ", buflen=20) at libusb.c:496
496             if (!udev) {
(gdb) c
Continuing.
  50.329396     libusb_get_string: Invalid argument
  50.329543     Path:
UPS.PowerSummary.PresentStatus.TLNeedReplacement, Type: Input,
ReportID: 0x32, Offset: 4, Size: 1, Value: 0

Breakpoint 1, libusb_get_string (udev=0x43110, StringIdx=0,
buf=0x40204 <buf> "", buflen=20) at libusb.c:496
496             if (!udev) {
(gdb) bt
#0  libusb_get_string (udev=0x43110, StringIdx=0, buf=0x40204 <buf>
"", buflen=20) at libusb.c:496
#1  0x00015330 in HIDGetIndexString (udev=<optimized out>,
Index=<optimized out>, buf=0x40204 <buf> "",
buflen=<optimized out>)
at libhid.c:407
#2  0x00012e18 in ups_infoval_set (item=0x3ee48 <tripplite_hid2nut>,
value=<optimized out>) at usbhid-ups.c:1552
#3  0x00013da8 in upsdrv_updateinfo () at usbhid-ups.c:835
#4  0x00012410 in main (argc=<optimized out>, argv=<optimized out>)
at
main.c:708

Charles Lepple

2015-Jun-10 03:10 UTC

head link

[Nut-upsdev] libusb_get_string: invalid argument

On Jun 9, 2015, at 4:55 PM, Greg Hersch wrote:
> (gdb) bt
> #0  libusb_get_string (udev=0x43110, StringIdx=0, buf=0x40204 <buf>
> "", buflen=20) at libusb.c:496
> #1  0x00015330 in HIDGetIndexString (udev=<optimized out>,
> Index=<optimized out>, buf=0x40204 <buf> "",
buflen=<optimized out>)
> at libhid.c:407
> #2  0x00012e18 in ups_infoval_set (item=0x3ee48 <tripplite_hid2nut>,
> value=<optimized out>) at usbhid-ups.c:1552
> #3  0x00013da8 in upsdrv_updateinfo () at usbhid-ups.c:835
> #4  0x00012410 in main (argc=<optimized out>, argv=<optimized
out>) at
> main.c:708
You did everything right on the backtrace, but that is puzzling.

At #2, ups_infoval_set() apparently calls HIDGetIndexString(), but I don't
see where it does that in the code. There must be some pointers, or something.

The easiest thing might be to crank the debug output up a bit more (5x -D, even)
but since that will be a bit more output, please redirect it to a file, and gzip
the log before attaching it. Doesn't need to be long, just enough to see one
or two errors.

Another idea is to recompile without optimizations, to see if that helps the gdb
backtrace. NUT apparently sets CFLAGS=-O if it is not set already, so adding
"CFLAGS=-g" to the ./configure line should do it.

Arnaud, am I missing something obvious here? After making
"device.part" HU_STATIC, there shouldn't be any other string
descriptors retrieved in drivers/tripplite-hid.c.

-- 
Charles Lepple
clepple at gmail

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