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DEV_MKDB(8) System Manager's Manual DEV_MKDB(8)

dev_mkdbcreate /dev database

dev_mkdb [-c] [-o database] [directory]

The dev_mkdb command creates a cdbr(3) database in “/var/run/dev.cdb” 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:

Create a db(3) database for compatibility with libc versions and statically linked programs from before NetBSD 6.0. The default name is “/var/run/dev.db”.
Put the output databases in the named file.

Device directory.
Database file.

ps(1), stat(2), db(3), devname(3), kvm_nlist(3), ttyname(3)

The dev_mkdb command appeared in 4.4BSD.

June 1, 2012 NetBSD-7.0.1