NAME
cap_mkdb —
create capability
database
SYNOPSIS
cap_mkdb |
[-b | -l]
[-v]
[-f
outfile] file1
[file2 ...] |
DESCRIPTION
cap_mkdb builds a hashed database out of the
getcap(3) logical database
constructed by the concatenation of the specified files.
The database is named by the basename of the first file argument and the string
“.db”. The
getcap(3)
routines can access the database in this form much more quickly than they can
the original text file(s).
The ``tc'' capabilities of the records are expanded before the record is stored
into the database.
The options are as follows:
-
-
- -b
- Use big-endian byte order for database metadata.
-
-
- -f
outfile
- Specify a different database basename.
-
-
- -l
- Use little-endian byte order for database metadata.
-
-
- -v
- Print out the number of capability records in the
database.
The
-b and the
-l flags are mutually
exclusive. The default byte ordering is the current host order.
The following is a description of the hashed database created by
cap_mkdb. For a description of the format of the input files
see
capfile(5).
Each record is stored in the database using two different types of keys.
The first type is a key which consists of the first capability of the record
(not including the trailing colon (``:'')) with a data field consisting of a
special byte followed by the rest of the record. The special byte is either a
0 or 1, where a 0 means that the record is okay, and a 1 means that there was
a ``tc'' capability in the record that couldn't be expanded.
The second type is a key which consists of one of the names from the first
capability of the record with a data field consisting a special byte followed
by the first capability of the record. The special byte is a 2.
In normal operation names are looked up in the database, resulting in a key/data
pair of the second type. The data field of this key/data pair is used to look
up a key/data pair of the first type which has the real data associated with
the name.
EXIT STATUS
The
cap_mkdb utility exits 0 on success, and >0
if an error occurs.
SEE ALSO
dbopen(3),
getcap(3),
capfile(5)