Please note that /dev/shmem is not a directory. It is a mount point for the resource manager that provides the path for 
shared memory objects.
The distributed nature of the QNX path space management means that every resource manager is free to implement this 
functionality in whatever way it wants, which can lead to inconsistencies. I'm not saying that your expectation of /dev/
shmem is wrong, but the implementation for this particular resource manager just returns the current time if you ask 
about the mount point.

--Elad
________________________________________
From: Lauri Kaila <community-noreply@qnx.com>
Sent: 22 January 2020 06:25:44
To: ostech-core_os
Subject: stat() timestamps for directories

Hi,

The online manual doesn't say how file timestamps are updated for directories. http://www.qnx.com/developers/docs/7.0.0/
index.html#com.qnx.doc.neutrino.lib_ref/topic/s/stat_struct.html

So my question is, when does QNX update st_mtime for directories? I was hoping that stat("/dev/shmem/") would tell if 
some process has created a new shared memory object. However, I'm observing that mtime is constantly updating, even if 
no shm objects seem to be created/removed. Also /dev/shmem/slogger2/ timestamp seems to be constantly updating, even the
 mtime of each file in that direcory is not changed.

Thanks,
Lauri



_______________________________________________

OSTech
http://community.qnx.com/sf/go/post120171
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