cnid_metad (8) - Linux Manuals

cnid_metad: start cnid_dbd daemons on request


cnid_metad - start cnid_dbd daemons on request


cnid_metad [-d] [-h hostname] [-p port] [-u user] [-g group] [-s cnid_dbdpathname]



waits for requests from afpd to start up instances of the cnid_dbd daemon. It keeps track of the status of a cnid_dbd instance once started and will restart it if necessary. cnid_metad is normally started at boot time from /etc/rc or equivalent and runs until shutdown. afpd needs to be configured with the -cnidserver option in afpd.conf in order to access cnid_metad. It is possible to run more than one instance of cnid_metad on the same machine if different values for the interface and/or port are specified with the -h and -p options.



cnid_metad will remain in the foreground and will also leave the standard input, standard output and standard error file descriptors open. Useful for debugging.

-h hostname

Use hostname as the network interface for requests as opposed to the default localhost .

-p port

Use port as the port number for reqests. Default is 4700.

-u user

Switch to the userid of user before serving requests. This userid will be inherited by all cnid_dbd daemon processes started.

-u group

Switch to the groupid of group before serving requests. This groupid will be inherited by all cnid_dbd daemon processes started. Both user and group must be specified as strings.

-s cnid_dbd pathname

Use cnid_dbd pathname as the pathname of the executeable of the cnid_dbd daemon. The default is /usr/sbin/cnid_dbd.


The number of cnid_dbd subprocecesses is currently limited to 512.

cnid_metad does not block or catch any signals apart from SIGPIPE. It will therefore exit on most signals received. This will also cause all instances of cnid_dbd's started by that cnid_metad to exit gracefully. Since state about and IPC access to the subprocesses is only maintained in memory by cnid_metad this is desired behaviour. As soon as cnid_metad is restarted afpd processes will transparently reconnect.


cnid_dbd(8), afpd(8)