DEV_MKDB(8) System Manager's Manual DEV_MKDB(8)
NAME
dev_mkdbcreate /dev database
SYNOPSIS
dev_mkdb
[-o database] [directory]
DESCRIPTION
The dev_mkdb command creates a db(3) hash access method database in “/var/run/dev.db” which contains the names of all of the character and block special files in the specified directory, using the file type and the st_rdev field as the key. If no directory is specified, the “/dev” directory is used.
 
Keys are a structure containing a mode_t followed by a dev_t, with any padding zero'd out. The former is the type of the file (st_mode & S_IFMT), the latter is the st_rdev field.
 
The options are as follows:
-o database
Put the output databases in the named file.
FILES
/dev
Device directory.
/var/run/dev.db
Database file.
SEE ALSO
HISTORY
The dev_mkdb command appeared in 4.4BSD.