xref: /freebsd/usr.bin/cap_mkdb/cap_mkdb.1 (revision 42249ef2)
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28.\"	@(#)cap_mkdb.1	8.1 (Berkeley) 6/6/93
29.\" $FreeBSD$
30.\"
31.Dd February 22, 2005
32.Dt CAP_MKDB 1
33.Os
34.Sh NAME
35.Nm cap_mkdb
36.Nd create capability database
37.Sh SYNOPSIS
38.Nm
39.Op Fl b | l
40.Op Fl v
41.Op Fl f Ar outfile
42.Ar
43.Sh DESCRIPTION
44The
45.Nm
46utility builds a hashed database out of the
47.Xr getcap 3
48logical database constructed by the concatenation of the specified
49files.
50.Pp
51The database is named by the basename of the first file argument and
52the string
53.Dq .db .
54The
55.Xr getcap 3
56routines can access the database in this form much more quickly
57than they can the original text file(s).
58.Pp
59The ``tc'' capabilities of the records are expanded before the
60record is stored into the database.
61.Pp
62The following options are available:
63.Bl -tag -width indent
64.It Fl b
65Use big-endian byte order for database metadata.
66.It Fl f Ar outfile
67Specify a different database basename.
68.It Fl l
69Use little-endian byte order for database metadata.
70.It Fl v
71Print out the number of capability records in the database.
72.El
73.Pp
74The
75.Fl b
76and
77.Fl l
78flags are mutually exclusive.
79The default byte ordering is the current host order.
80.Sh FORMAT
81Each record is stored in the database using two different types of keys.
82.Pp
83The first type is a key which consists of the first capability of
84the record (not including the trailing colon (``:'')) with a data
85field consisting of a special byte followed by the rest of the record.
86The special byte is either a 0 or 1, where a 0 means that the record
87is okay, and a 1 means that there was a ``tc'' capability in the record
88that could not be expanded.
89.Pp
90The second type is a key which consists of one of the names from the
91first capability of the record with a data field consisting a special
92byte followed by the first capability of the record.
93The special byte is a 2.
94.Pp
95In normal operation names are looked up in the database, resulting
96in a key/data pair of the second type.
97The data field of this key/data pair is used to look up a key/data
98pair of the first type which has the real data associated with the
99name.
100.Sh EXIT STATUS
101.Ex -std
102.Sh SEE ALSO
103.Xr dbopen 3 ,
104.Xr getcap 3 ,
105.Xr termcap 5
106