Create socket

[Archos]

How to create a socket file in Go?

In C would be the function [mknod](http://linux.die.net/man/2/mknod)

[Kyle Lemons]

Are you trying to use unix domain sockets?  If so, listening on the file should do it.

[Archos]

On Jun 15, 1:10 am, Kyle Lemons <kev...@google.com> wrote:
> Are you trying to use unix domain sockets?  If so, listening on the file
> should do it.

But I want to have a file in /dev, just like is done by rsyslogd which
uses the next sockets file:

# ll /dev/log
srw-rw-rw- 1 root root 0 jun 14 07:11 /dev/log=

[Kyle Lemons]

Can you not listen on the path you want?

[Archos]

On Jun 15, 1:22 am, Kyle Lemons <kev...@google.com> wrote:
> Can you not listen on the path you want?

Ok, the domain will listen there. It's only just that I thought it
could be better if were created that device (like in C) at installing
the program.

[Kyle Lemons]

I don't think that's how rsyslogd does it either.  Sockets are owned by a particular PID, if I understand it correctly, and you can't listen to a socket created by another process, so you delete it and recreate it if it's there on startup (possibly after checking if the original daemon is still alive).

[Dave Cheney]

https://github.com/davecheney/gmx/blob/master/gmx.go#L36

[Archos]

Just for archiving:

        oldmask := syscall.Umask(0)
        err := syscall.Mknod("/path/to/socket", syscall.S_IFSOCK|0666, 0)
        if err != nil {
            log.Fatal(err)
        }
        syscall.Umask(oldmask)

[Archos]

Ops! Call to syscall.Umask before of exit if you want not lose the mask:

        oldmask := syscall.Umask(0)
        err := syscall.Mknod("/path/to/socket", syscall.S_IFSOCK|0666, 0)

        syscall.Umask(oldmask)

[Archos]

It is not necessary to call ` syscall.Umask(oldmask)`, at least that you need call to functions that use the mask and you need the original value.