Hello Charles,

You need to specify the SCSI control device for the tapeinfo command and 
not the tape device.  Probably you want /dev/sgN where N is probably 2 
or 3, but it is best to do an "lsscsi -g" to find out the right name.  
It the control device is listed last column of every line following the 
normal device name.

Best regards,

Kern


On 04/24/2017 04:01 PM, Charles wrote:
> Thanks Javier :-)
>
> Exit code 127 normally means the command is not found rather than that
> the command is found but does not have the correct permissions.  In my
> first post I described trying /usr/sbin/tapeinfo and getting similar
> results.
>
> bacula-sd runs as user bacula and group tape.  "Other" permissions look OK:
> # ls -l /usr/sbin/tapeinfo
> -rwxr-xr-x 1 root root 44400 Oct 24  2014 /usr/sbin/tapeinfo
> # ls -ld /usr/sbin
> drwxr-xr-x 2 root root 12288 Apr 18 06:35 /usr/sbin
>
> /usr/sbin/tapeinfo runs as bacula with group tape (after changing
> bacula's shell from /bin/false):
>
> # su -c 'sg tape -c /bin/bash' bacula
> bash: cannot set terminal process group (8642): Inappropriate ioctl for
> device
> bash: no job control in this shell
> $ id
> uid=112(bacula) gid=26(tape) groups=26(tape),119(bacula)
> $ /usr/sbin/tapeinfo -f /dev/st0
> cannot open SCSI device '/dev/st0' - No medium found
>
> I believe I am doing something stupid in the conf file causing bacula-sd
> to attempt to run a command other than (/usr/sbin/)tapeinfo, perhaps
> with a quote included in the name or with the arguments not separated
> from the command word.
>
> Here's the first attempt, copied and pasted from the Main Reference
> (.bu0 means "backup 0"):
>
> # grep '^ .*Alert' bacula-sd.conf.bu0
>       Alert Command = "sh -c ’tapeinfo -f %c | grep TapeAlert’
>
> Charles
>
> On 24/04/17 17:57, bacula-users-request AT lists.sourceforge DOT net wrote:
>> Date: Tue, 18 Apr 2017 21:13:19 +0200
>> From: Francisco Javier Funes Nieto <esencia AT gmail DOT com>
>> Subject: Re: [Bacula-users] 7.4.x Device Resource, Alert Command
>>      documentation and usage
>> Cc: bacula-users <bacula-users AT lists.sourceforge DOT net>
>> Message-ID:
>>      <CAKWep2Wp8o0D7peBiWP3CpXL0i47rPmTBwrup_SRErxNJBZcow AT mail.gmail DOT 
>> com>
>> Content-Type: text/plain; charset="utf-8"
>>
>> Last check, the user that runs the Storage Daemon (maybe bacula) has right
>> permissions of tapinfo binary ? Maybe you have to call the tapeinfo with
>> the path  (/usr/sbin/tapeinfo) or wherever is located in your system.
>>
>> J.
>>
>>
>>
>> 2017-04-18 19:05 GMT+02:00 Charles <c AT charlesmatkinson DOT org>:
>>
>>> On 18/04/17 21:19, bacula-users-request AT lists.sourceforge DOT net wrote:
>>>> Date: Tue, 18 Apr 2017 09:15:37 +0200
>>>> From: Francisco Javier Funes Nieto <esencia AT gmail DOT com>
>>>> Subject: Re: [Bacula-users] 7.4.x Device Resource, Alert Command
>>>>        documentation and usage
>>>> Cc: bacula-users <bacula-users AT lists.sourceforge DOT net>
>>>> Message-ID:
>>>>        <CAKWep2XU7zBMeC-fouuO4xOb3TN5bzdSx4gbtwFpUY2K=
>>> 9W7ag AT mail.gmail DOT com>
>>>> Content-Type: text/plain; charset="utf-8"
>>>>
>>>> Did you check if the mtx package was installed on the system ?
>>>>
>>>> J.
>>>>
>>>> 2017-04-18 8:27 GMT+02:00 Charles <c AT charlesmatkinson DOT org>:
>>>>
>>>>> How should the sample Alert Command using tapeinfo be configured?
>>>>>
>>>>> In the Bacula Main Reference 7.4.3 (18 June 2016).pdf", section 18.3
>>>>> "Device Resource" shows a sample Alert Command:
>>>>>
>>>>>      Alert Command = "sh -c ?tapeinfo -f %c | grep TapeAlert?"
>>>>>
>>>>> That was copied and pasted into the Bacula conf but generated:
>>>>>
>>>>> Alert: -f: 1: -f: ?tapeinfo: not found
>>>>> 3997 Bad alert command: sh -c ?tapeinfo -f /dev/sg5 | grep TapeAlert?:
>>>>> ERR=Child exited with code 127.
>>>>>
>>>>> After changing the tapeinfo to /usr/sbin/tapeinfo the error messages
>>>>> were similar.
>>>>>
>>>>> After changing the ? characters to ' characters the error messages were
>>>>> similar.
>>>>>
>>>>> The difficulty was worked around by using an external script to simplify
>>>>> the conf:
>>>>>
>>>>>       Alert Command = "/usr/local/sbin/tapealert-for-bacula.sh"
>>>>>
>>>>> How should the sample command be configured?
>>> Thanks Fransico
>>>
>>> The mtx package is installed.  At a command prompt ...
>>>
>>>       tapeinfo -f /dev/sg5 | grep TapeAlert
>>>
>>> ... runs without error as does:
>>>
>>>       sh -c 'tapeinfo -f /dev/sg5 | grep TapeAlert'
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