1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
|
.\" Copyright (c) 2018 Mariusz Zaborski <oshogbo@FreeBSD.org>
.\" All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\" notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\" notice, this list of conditions and the following disclaimer in the
.\" documentation and/or other materials provided with the distribution.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
.\" $FreeBSD$
.\"
.Dd May 5, 2020
.Dt LIBCASPER 3
.Os
.Sh NAME
.Nm CREATE_SERVICE
.Nd "casper service declaration macro"
.Sh LIBRARY
.Lb libcasper
.Sh SYNOPSIS
.In sys/nv.h
.In libcasper.h
.In libcasper_service.h
.Bd -literal
typedef int service_limit_func_t(const nvlist_t *, const nvlist_t *);
typedef int service_command_func_t(const char *, const nvlist_t *, nvlist_t *,
nvlist_t *);
.Ed
.Fn CREATE_SERVICE "name" "limit_func" "command_func" "flags"
.Sh DESCRIPTION
The
.Nm CREATE_SERVICE
macro to create a new Casper service.
The
.Fa name
is a string containing the service name, which will be used in the
.Xr cap_service_open 3,
function to identify it.
.Pp
The
.Fa limit_func
is a function of type
.Li service_limit_func_t .
The first argument of the function contains
.Xr nvlist 9 ,
old service limits and second one the new limits.
If the services wasn't limited the old limits will be set to
.Dv NULL .
This function should not allow to extend service limits and only limit it
further.
The
.Fa command_func
is a function of type
.Li service_command_func_t .
First argument is the name of the command that should be executed.
The first
.Xr nvlist 9
contains the current limits.
Next one contains a
.Xr nvlist 9
with current request.
The last one contains an output
.Xr nvlist 9
which contains the response from Casper.
.Pp
The
.Fa flags
argument defines limits of the service.
The supported flags are:
.Bl -ohang -offset indent
.It CASPER_SERVICE_STDIO
The Casper service has access to the stdio descriptors from the process it was
spawned from.
.It CASPER_SERVICE_FD
The Casper service has access to all descriptors besides stdio descriptors from
the process it was spawned from.
.It CASPER_SERVICE_NO_UNIQ_LIMITS
The whole Casper communication is using
.Xr nvlist 9
with
.Xr NVLIST_NO_UNIQ 9
flag.
.El
.Sh SEE ALSO
.Xr cap_enter 2 ,
.Xr libcasper 3 ,
.Xr capsicum 4 ,
.Xr nv 9
.Sh HISTORY
The
.Nm libcasper
library first appeared in
.Fx 10.3 .
.Sh AUTHORS
The
.Nm libcasper
library was implemented by
.An Pawel Jakub Dawidek Aq Mt pawel@dawidek.net
under sponsorship from the FreeBSD Foundation.
The
.Nm libcasper
new architecture was implemented by
.An Mariusz Zaborski Aq Mt oshogbo@FreeBSD.org
.
|
