How to check for open file descriptor for a running process

UNIX for Advanced & Expert Users
1

Hi,

I am having a similar situation like this one here

https://www.dbi-services.com/blog/oracle-12-2-how-to-rotate-the-12-2-listener-log-diag_adr_enabled_listener-off-follow-up/

However, when I run the lsof -p, I am getting the error below

lsof: can't stat(/devices): No such file or directory

I am on Solaris version SunOS [hostname] 5.11 11.4.77.182.2 sun4v sparc sun4v non-global-zone

Is it because I am on the zone and not on the LDOM :frowning:
Is there another way of checking if there is an open file descriptor associated to a process?
I do not have sudo access.

Had also checked /process/[pid]/fd, there are several files there, I thought there should just be one :frowning:

Please advise. Thanks.

2

Solaris has
pfiles

But lsof -p should actually work ... Maybe it is too slow to be useful.

3

I am getting an error running lsof -p for Solaris. I think maybe because I am the local zone. I've no access to the global zone :frowning:

I was able to run pfiles but I can't see which file descriptor is assigned to the log.

I am trying to simulate whether the behavior that the author presented on his article will have the same behavior in Solaris when I do a mv of the file. I'll search further. Thanks.

4

If you know the log file then you can run fuser on it to get the PID.
Its output is partly stdout and partly stdin.

pids=$(fuser /path/to/listener.log 2>/dev/null)
echo "$pids"