程序必须访问包中的全局变量

Question

I've a package with global variables related to a file open (*os.File), and its logger associated. By another side, I'll build several commands that are going to use that package and I want not open the file to set it as logger every time I run a command.

So, the first program to run will set the global variables, and here is my question:

• Do the next programs to use the package can access to those global variables without problem? It could be created a command with a flag to initialize those values before of be used by another programs, and another flag to finish it (unset the global variables in the package).

• If that is not possible, which is the best option to avoid such IO-bound? To use a server in Unix sockets?

Answer 1

Assuming by 'program' you actually mean 'process', the answer is no.

If you want to share a (customized perhaps) logging functionality between processes then I would consider a daemon-like (Go doesn't yet AFAIK support writing true daemons) process/server and any kind of IPC you see handy.