Nagios Support Forum

Hi,

Jon Angliss wrote:
> On Wed, 13 May 2009 17:47:06 -0400, Mathieu Gagn=E9
> wrote:
>=20
>> Hi,
>>
>> I did a strace on the Nagios daemon and found out there's 2 calls =
to=20
>> unlink for each check result file in checkresults.
>=20
> I believe they're only temporary files to contact results from a
> specific check.

Yes they are temporary files.

>> For example:
>>
>> stat64("/usr/local/nagios/var/spool/checkresults/cXKYnMY",=20
>> {st_mode=3DS_IFREG|0600, st_size=3D475, ...}) =3D 0
>> stat64("/usr/local/nagios/var/spool/checkresults/cXKYnMY.ok",=20
>> {st_mode=3DS_IFREG|0600, st_size=3D0, ...}) =3D 0
>> time(NULL) =3D 1242249182
>> open("/usr/local/nagios/var/spool/checkresults/cXKYnMY", O_RDONLY)=
=3D 7
>> fstat64(7, {st_mode=3DS_IFREG|0600, st_size=3D475, ...}) =3D 0
>> mmap2(NULL, 475, PROT_READ, MAP_PRIVATE, 7, 0) =3D 0xb7ee8000
>> munmap(0xb7ee8000, 475) =3D 0
>> close(7) =3D 0
>> unlink("/usr/local/nagios/var/spool/checkresults/cXKYnMY") =3D 0
>> unlink("/usr/local/nagios/var/spool/checkresults/cXKYnMY.ok") =
=3D 0
>>
>> [......]
>>
>> unlink("/usr/local/nagios/var/spool/checkresults/cXKYnMY") =3D -1 =
ENOENT=20
>> (No such file or directory)
>> unlink("/usr/local/nagios/var/spool/checkresults/cXKYnMY.ok") =
=3D -1=20
>> ENOENT (No such file or directory)
>>
>>
>> Any idea about the source of this problem? (if it's one)
>=20
> Are you seeing a problem? It's supposed to unlink them I believe. =
See
> base/utils.c delete_check_result_file, I believe that's probably wh=
ere
> you're seeing the two unlink calls come from.
>=20

Nagios tries to delete both files 2 times. For one file:
unlink("/usr/local/nagios/var/spool/checkresults/cXKYnMY") =3D 0
unlink("/usr/local/nagios/var/spool/checkresults/cXKYnMY") =3D -1 ENO=
ENT=20
(No such file or directory)

My opinion is that Nagios shouldn't try to delete it a second time. O=
ne=20
time is enough.

I'll try to investigate it further on next week if nobody finds...

--
Mathieu






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