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     devtoname — converts dev_t data into a string indicating the device name


     #include <sys/param.h>
     #include <sys/conf.h>

     const char *
     devtoname(dev_t dev);


     The devtoname() function returns a pointer to the name of the device passed to it.  The name
     is whatever was set to it in make_dev().  If no name is associated with dev, a pointer to a
     string consisting of a “#” followed by “major/minor” as it applies to dev is returned.


     The devtoname() interface first appeared in FreeBSD 4.0