DragonFly On-Line Manual Pages
DB(1) DragonFly General Commands Manual DB(1)
NAME
db - manipulate db(3)'s btree(3) and hash(3) databases
SYNOPSIS
db [-KiNqV] [-E endian] [-f infile] [-O outsep] [-S visitem] [-T visspec]
type dbfile [key [...]]
db -d [-iNq] [-E endian] [-f infile] [-U unvisitem] type dbfile
[key [...]]
db -w [-CDiNqR] [-E endian] [-F insep] [-f infile] [-m mode]
[-U unvisitem] type dbfile [key value [...]]
DESCRIPTION
db allows manipulation of btree(3) and hash(3) (db(3)) databases.
db has three modes of operation to perform upon dbfile:
read Displays the given keys, and keys described in infile. If
no keys and no infile is specified, the entire database is
displayed. This is the default mode of operation.
delete Enabled with -d. Deletes the given keys, and keys
described in infile.
write Enabled with -w. Writes the given keys and values, and
keys and values described in infile (in the latter case,
entries are separated by insep).
There are two mandatory arguments: type is the database type; either
`btree' or `hash', and dbfile is the database file to manipulate.
Options valid for all modes are:
-E endian Set the endianness of the database. endian may be one
of:
B Big endian
H Host endian
L Little endian
Defaults to `H' (host endian).
-f infile Contains a list of keys (for read and delete), or insep
separated keys and values (for write) to be used as
arguments to the given mode. If infile is `-', stdin
is used.
-i Keys are converted to lower case before manipulation.
-N Do not include the NUL byte at the end of the key or
value.
-q Quiet operation. In read mode, missing keys are not
considered to be an error. In delete (-d) and write
(-w) modes, the result of various operations is
suppressed.
Read mode specific options are:
-K Display key.
-O outsep Field separator string between key and value. Defaults
to a single tab (`\t').
-S visitem Specify items to strvis(3) encode. The visitem option-
argument is a character specifying if the key (k), the
value (v) or both (b) should be encoded.
-T visspec Control how the items specified by the -S option are
encoded. The visspec option-argument is a string
specifying strvis(3) options. The string consists of
the specification characters b, c, o, s, t, and w. See
vis(1)'s corresponding options for the meaning of these
characters.
-V Display value.
(If neither of -K or -V is given, both options are enabled.)
Write mode specific options are:
-C Create new database, and truncate existing databases.
-D Allow duplicate entries. (Requires -R to be useful.)
-F insep Input field separator string between key and value used
when parsing infile. Defaults to a single space (` ').
-m mode Octal mode of created database. Defaults to `0644'.
-R Overwrite existing entries. If not specified, writing
to an existing entry raises an error.
Write and delete mode specific options are:
-U unvisitem
Specify items to strunvis(3) decode. The unvisitem
option-argument is a character specifying if the key
(k), the value (v) or both (b) should be decoded.
SEE ALSO
vis(1), btree(3), db(3), hash(3), strunvis(3), strvis(3), svis(3),
makemap(8)
HISTORY
The db command appeared in NetBSD 2.0.
AUTHORS
Luke Mewburn <lukem@NetBSD.org>.
DragonFly 6.5-DEVELOPMENT June 20, 2005 DragonFly 6.5-DEVELOPMENT