bin/57857: cp(1) cannot operate on files residing on pseudo-filesystems

[rbranco%suse.de@localhost]

>Number:         57857
>Category:       bin
>Synopsis:       cp(1) cannot operate on files residing on pseudo-filesystems
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    bin-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sun Jan 14 18:40:00 +0000 2024
>Originator:     Ricardo Branco
>Release:        NetBSD 10.0_RC2
>Organization:
>Environment:
>Description:
cp(1) cannot operate on files residing on pseudo-filesystems
>How-To-Repeat:
To reproduce:

```
$ cp /proc/mounts /tmp
$ ls -l /tmp/mounts
-r--r--r--  1 ricardo  wheel  0 Jan 14 19:30 /tmp/mounts
```
>Fix:
https://github.com/NetBSD/src/pull/24