Hello mje,
You can use read as a temporary solution it does not give the warning, but it is not the same as sysread.
From the read documentation:
The call is implemented in terms of either Perl's or your system's native fread(3) library function. To get a true read(2) system call, see sysread.
I just tested with your code and the output looks ok:
$ perl test.pl
child started
Cannot connect to child socket - Connection refused
Cannot connect to child socket - Connection refused
Cannot connect to child socket - Connection refused
connection from 127.0.0.1:33980
Child reading socket
shutdown 1
Child got /<element>Hello</element>/
connection from 127.0.0.1:33982
Child reading socket
Child EOF
Child reading socket
Child got /<element>Hello2</element>/
Child reading socket
Child EOF
shutdown 2
closing socket
Killing child
waiting on child
parent exiting
In comparison with sysread:
$ perl test.pl
child started
Cannot connect to child socket - Connection refused
Cannot connect to child socket - Connection refused
Cannot connect to child socket - Connection refused
connection from 127.0.0.1:33788
Child reading socket
sysread() is deprecated on :utf8 handles at test.pl line 108.
Child got /<element>Hello</element>/
connection from 127.0.0.1:33792
Child reading socket
sysread() is deprecated on :utf8 handles at test.pl line 108.
Child got /<element>Hello2</element>/
shutdown 1
Child reading socket
sysread() is deprecated on :utf8 handles at test.pl line 108.
Child EOF
Child reading socket
sysread() is deprecated on :utf8 handles at test.pl line 108.
Child EOF
shutdown 2
closing socket
Killing child
waiting on child
parent exiting
Give it a try if it meets your criteria.
I tested on:
$ perl -v
This is perl 5, version 24, subversion 1 (v5.24.1) built for x86_64-li
+nux-gnu-thread-multi
(with 67 registered patches, see perl -V for more detail)
Copyright 1987-2017, Larry Wall
Perl may be copied only under the terms of either the Artistic License
+ or the
GNU General Public License, which may be found in the Perl 5 source ki
+t.
Complete documentation for Perl, including FAQ lists, should be found
+on
this system using "man perl" or "perldoc perl". If you have access to
+ the
Internet, point your browser at http://www.perl.org/, the Perl Home Pa
+ge.
Hope this helps, BR.
Seeking for Perl wisdom...on the process of learning...not there...yet!