DESCRIPTION
The
devname() function returns a pointer to the name of the block or character device in “
/dev” with a device number of
dev, and a file type matching the one encoded in
type which must be one of S_IFBLK or S_IFCHR. The device name is cached so that multiple calls with the same
dev and
type do not require additional queries of the device database file. If no device matches the specified values, or no information is available,
NULL is returned.
The traditional display for applications when no device is found is the string “??”.