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Re: [lmi] Where can I find the urtext of mount data?
From: |
Greg Chicares |
Subject: |
Re: [lmi] Where can I find the urtext of mount data? |
Date: |
Tue, 12 May 2020 23:11:56 +0000 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.8.0 |
On 2020-05-12 22:15, Vadim Zeitlin wrote:
> On Tue, 12 May 2020 21:41:19 +0000 Greg Chicares <address@hidden> wrote:
>
> GC> I thought /proc/mounts was supposed to be the definitive repository
> GC> of mount information, so does findmnt get this extra information:
> GC> [/var/cache/centos_lmi]
> GC> from some more definitive source?
[...you consulted its manpage...]
> And, lo and behold, looking at /proc/self/mountinfo, I do indeed see that
> it contains the information you're after, i.e. the original mount point for
> r-bounded mounts (for all the other ones it's just "/").
Wow, thanks, I was snowblind. After seeing many people speak of
"/proc/mounts or /proc/self/mounts", and finding that they're the same:
lrwxrwxrwx 1 root root 11 May 12 17:40 /proc/mounts -> self/mounts
...I had added a mental filter
s,/proc/\(self/\)*mount.*,the_proc_mount_thing,
and therefore
$echo "/proc/self/mountinfo" |sed
-e's,/proc/\(self/\)*mount.*,the_proc_mount_thing,'
the_proc_mount_thing
so, despite reading that manpage repeatedly, I couldn't see that
"mounts" != "mountinfo".