NAME
CREATE_SERVICE —
casper service declaration
macro
LIBRARY
library “libcasper”
SYNOPSIS
#include
<sys/nv.h>
#include <libcasper.h>
#include
<libcasper_service.h>
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 *);
CREATE_SERVICE(name,
limit_func,
command_func,
flags);
DESCRIPTION
TheCREATE_SERVICE macro to create a new Casper service.
The name is a string containing the service name, which
will be used in the
cap_service_open(3,) function to identify it.
The limit_func is a function of type
service_limit_func_t. The first argument of the
function contains
nvlist(9), old service limits and second one the new limits. If the
services wasn't limited the old limits will be set to
NULL. This function should not allow to extend
service limits and only limit it further. The
command_func is a function of type
service_command_func_t. First argument is the name
of the command that should be executed. The first
nvlist(9) contains the current limits. Next one contains a
nvlist(9) with current request. The last one contains an output
nvlist(9) which contains the response from Casper.
The flags argument defines limits of the service. The supported flags are:
- CASPER_SERVICE_STDIO
- The Casper service has access to the stdio descriptors from the process it was spawned from.
- CASPER_SERVICE_FD
- The Casper service has access to all descriptors besides stdio descriptors from the process it was spawned from.
- CASPER_SERVICE_NO_UNIQ_LIMITS
- The whole Casper communication is using nvlist(9) with NVLIST_NO_UNIQ(9) flag.
SEE ALSO
AUTHORS
The libcasper library was implemented by
Pawel Jakub Dawidek
<pawel@dawidek.net>
under sponsorship from the FreeBSD Foundation. The
libcasper new architecture was implemented by
Mariusz Zaborski
<oshogbo@FreeBSD.org>