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 lsof 4.99.5 is not working correctly

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Steve Purton's profile image
Steve Purton posted Mon February 02, 2026 05:47 PM

After installing lsof 4.99.5 on a test server running AIX 7.2 TL05 SP7, I receive errors when querying file systems. Is a solution in the works?

lsof -v - works

lsof -u root - works

lsof /tmp
lsof: WARNING: can't stat() jfs2 file system
      Output information may be incomplete.
      assuming "dev=0x80000000" from mount table
lsof: WARNING: can't stat() jfs2 file system
      Output information may be incomplete.
      assuming "dev=0x80000000" from mount table
lsof: WARNING: can't stat() jfs2 file system
      Output information may be incomplete.
      assuming "dev=0x80000000" from mount table

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Dusan Hlavac's profile image
Dusan Hlavac posted Fri February 13, 2026 10:03 AM

It seems that version 4.99.5 is buggy. I can confirm there is the same issue on
AIX 7.2 TL05 SP09 
AIX 7.3 TL00 SP00
AIX 7.3 TL00 SP01

Markus Dörr's profile image
Markus Dörr posted Thu February 19, 2026 05:50 AM

Is the warning indicating that default ("assuming") would work on linux best. but how the real information is missed out for AIX by lsof then?;
for curiosity you may check the loglv and related log entries in /etc/filesystem w/ your test-environment for any FS you "lsof"

TS SSIBM's profile image
TS SSIBM posted Thu February 19, 2026 08:59 AM

Same issue for 7300-03-01-2520. And the following warning remains:

lsof: WARNING: compiled for AIX version 7.2.0.0; this is 7.3.0.0.



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