Log rotation doesn't preserve file permissions

[regsmith]

If you create a file with user permissions but then run logger under root the file rotate will not preserve these permissions causing access issues.

% ls -al log.log 
-rw-r--r--  1 reginaldsmith  staff  0 23 Sep 11:17 log.log
% rvmsudo irb
2.7.2 :001 > require "logger"
 => true 
2.7.2 :004 > puts File.stat("log.log").uid
502
 => nil 
2.7.2 :005 > log = File.open("log.log", "a")
 => #<File:log.log> 
2.7.2 :006 > logger = Logger.new(log, "everytime")
 => #<Logger:0x00007fd7cfbc5ee0 @level=0, @progname=nil, @default_formatter=#<Logger::Formatter:0x00007fd7cfbc5eb8 @datetime_format=nil>, @formatte... 
2.7.2 :007 > logger.info "hello"
 => true 
2.7.2 :008 > puts File.stat("log.log").uid
0 
2.7.2 :010 > exit
% ls -al log.log
-rw-r--r--  1 root  staff  123 23 Sep 11:20 log.log
% irb
2.7.2 :001 > require "logger"
 => true 
2.7.2 :002 > log = File.open("log.log", "a")
Errno::EACCES (Permission denied @ rb_sysopen - log.log)
>

[olleolleolle]

Peeking at the code, perhaps this is where we have the information about the old file and are creating a new one: https://github.com/ruby/logger/blob/c601ed0370da6e509726cbabb22aaeaffeb3f477/lib/logger/log_device.rb#L201

(Perhaps there are more places, but this is a start, at least.)