Re: daemon: bind(11) failed errno=2 (No such file or directory)

[Ryan Tandy <ryan@nardis.ca>]

On Tue, Aug 07, 2018 at 01:32:26PM +0000, Alan Lukens wrote:
> After extensive searching i could only find one reference to the error "daemon: bind(11) failed errno=2 (No such file or directory)". and that was leading me in the direction of the directory /var/run/ldap didnt have the right permissions, but it was there and had openldap owner and group. I spent a number of hours double checking directories making sure everything was there and had the right permissions.
>
> I finally found /var/run/slapd was missing!

Are you running the Debian slapd package? The init script creates that 
directory automatically as one of the first actions in start_slapd() so 
I'm not sure why this happened to you. If you learn any more about how 
this happened I'd be interested in receiving a bug report in the Debian 
bug tracker. (Note that init scripts are distributors' responsibility 
and not in scope of the OpenLDAP project.)

> What is /var/run/slapd/ldapi ??
>
> And what does it do?

It is the UNIX socket used by the ldapi:// protocol, which is more 
efficient than TCP when the client and server are on the same system, 
and also offers the ability to use the client process' uid/gid for 
access control.

> For future reference what is bind(11) referring to? Where can i find 
> the reference to error codes?

11 is probably the file descriptor number of the ldapi socket within 
that slapd process. As for the error code (errno=2), the values are 
defined in the errno.h header and the errno(1) command can be used to 
list and query the values:

https://manpages.debian.org/stretch/moreutils/errno.1.en.html