BSD 2.11 - man page for dev_mkdb (bsd section 8)
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dev_mkdb - create /dev database
The dev_mkdb command creates a dbm(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 /dev directory,
using the file type and the st_rdev field as the key.
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.
/dev Device directory.
/var/run/dev.db Database file.
ps(1), stat(2), dbm(3), devname(3), ttyname(3)
The dev_mkdb command appeared in 4.4BSD.
4th Berkeley Distribution February 3, 1995 DEV_MKDB(8)
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