# smfi_opensocket

SYNOPSIS |
    #include <libmilter/mfapi.h>
    int smfi_opensocket(
    	bool rmsocket
    );
Attempt to create the interface socket MTAs will use to connect to the filter.
DESCRIPTION |
Called When | Called only from program mainline, after calling `smfi_setconn()` and `smfi_register()`, but before calling `smfi_main()`.
Effects | smfi_opensocket attempts to create the socket specified previously by a call to `smfi_setconn()` which will be the interface between MTAs and the filter. This allows the calling application to ensure that the socket can be created. If this is not called, `smfi_main()` will do so implicitly.
ARGUMENTS |
Argument | Description
--- | ---
rmsocket | A flag indicating whether or not the library should try to remove any existing UNIX domain socket before trying to create a new one.
RETURN VALUES | smfi_opensocket will fail and return MI_FAILURE if: The interface socket could not be created for any reason. `rmsocket` was `true`, and either the socket could not be examined, or exists and could not be removed. `smfi_setconn()` or `smfi_register()` have not been called. Otherwise, it will return MI_SUCCESS

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