Tribblix: manual page: ct_pr_tmpl_set

CT_PR_TMPL_SET_TRANSFER(3CONTRACT) Contract Management Library Functions

NAME

ct_pr_tmpl_set_transfer, ct_pr_tmpl_set_fatal, ct_pr_tmpl_set_param,
ct_pr_tmpl_set_svc_fmri, ct_pr_tmpl_set_svc_aux,
ct_pr_tmpl_get_transfer, ct_pr_tmpl_get_fatal, ct_pr_tmpl_get_param,
ct_pr_tmpl_get_svc_fmri, ct_pr_tmpl_get_svc_aux - process contract
template functions

SYNOPSIS

cc [ flag... ] file... -D_LARGEFILE64_SOURCE -lcontract [ library... ]
#include <libcontract.h>
#include <sys/contract/process.h>

int ct_pr_tmpl_set_transfer(int fd, ctid_t ctid);

int ct_pr_tmpl_set_fatal(int fd, uint_t events);

int ct_pr_tmpl_set_param(int fd, uint_t params);

int ct_pr_tmpl_set_svc_fmri(int fd, const char *fmri);

int ct_pr_tmpl_set_svc_aux(int fd, const char *aux);

int ct_pr_tmpl_get_transfer(int fd, ctid_t *ctidp);

int ct_pr_tmpl_get_fatal(int fd, uint_t *eventsp);

int ct_pr_tmpl_get_param(int fd, uint_t *paramsp);

int ct_pr_tmpl_get_svc_fmri(int fd, char *fmri, size_t size);

int ct_pr_tmpl_get_svc_aux(int fd, char *aux, size_t size);

DESCRIPTION

These functions read and write process contract terms and operate on
process contract template file descriptors obtained from the
contract(5) file system.

The ct_pr_tmpl_set_transfer() and ct_pr_tmpl_get_transfer() functions
write and read the transfer contract term. The value is the ID of an
empty regent process contract owned by the caller whose inherited
contracts are to be transferred to a newly created contract.

The ct_pr_tmpl_set_fatal() and ct_pr_tmpl_get_fatal() functions write
and read the fatal event set term. The value is a collection of bits
as described in process(5).

The ct_pr_tmpl_set_param() and ct_pr_tmpl_get_param() functions write
and read the parameter set term. The value is a collection of bits as
described in process(5).

The ct_pr_tmpl_set_svc_fmri() and ct_pr_tmpl_get_svc_fmri()
functions write and read the service FMRI value of a process contract
template. The ct_pr_tmpl_set_svc_fmri() function requires the caller
to have the {PRIV_CONTRACT_IDENTITY} privilege in its effective set.

The ct_pr_tmpl_set_svc_aux() and ct_pr_tmpl_get_svc_aux() functions
write and read the creator's auxiliary value of a process contract
template.

RETURN VALUES

Upon successful completion, ct_pr_tmpl_set_transfer(),
ct_pr_tmpl_set_fatal(), ct_pr_tmpl_set_param(),
ct_pr_tmpl_set_svc_fmri(), ct_pr_tmpl_set_svc_aux(),
ct_pr_tmpl_get_transfer(), ct_pr_tmpl_get_fatal(), and
ct_pr_tmpl_get_param() return 0. Otherwise, they return a non-zero
error value.

Upon successful completion, ct_pr_tmpl_get_svc_fmri() and
ct_pr_tmpl_get_svc_aux() return the size required to store the value,
which is the same value return by strcpy(3C) + 1. Insufficient buffer
size can be checked by:

if (ct_pr_tmpl_get_svc_fmri(fd, fmri, size) > size)
/* buffer is too small */

Otherwise, ct_pr_tmpl_get_svc_fmri() and ct_pr_tmpl_get_svc_aux()
return -1 and set errno to indicate the error.

ERRORS

The ct_pr_tmpl_set_param(), ct_pr_tmpl_set_svc_fmri(),
ct_pr_tmpl_set_svc_aux(), ct_pr_tmpl_get_svc_fmri() and
ct_pr_tmpl_get_svc_aux() functions will fail if:

EINVAL
An invalid parameter was specified.

The ct_pr_tmpl_set_fatal() function will fail if:

EINVAL
An invalid event was specified.

The ct_pr_tmpl_set_transfer() function will fail if:

ESRCH
The ID specified by ctid does not correspond to a
process contract.

EACCES
The ID specified by ctid does not correspond to a
process contract owned by the calling process.

ENOTEMPTY
The ID specified by ctid does not correspond to an empty
process contract.

The ct_pr_tmpl_set_svc_fmri() function will fail if:

EPERM
The calling process does not have {PRIV_CONTRACT_IDENTITY}
in its effective set.

EXAMPLES

Example 1: Create and activate a process contract template.

The following example opens a new template, makes hardware errors and
signals fatal events, makes hardware errors critical events, and
activates the template. It then forks a process in the new contract
using the requested terms.

#include <libcontract.h>
#include <fcntl.h>
#include <unistd.h>

...
int fd;

fd = open("/system/contract/process/template", O_RDWR);
(void) ct_pr_tmpl_set_fatal(fd, CT_PR_EV_HWERR|CT_PR_EV_SIGNAL);
(void) ct_tmpl_set_critical(fd, CT_PR_EV_HWERR);
(void) ct_tmpl_activate(fd);
close(fd);

if (fork()) {
/* parent - owns new process contract */
...
} else {
/* child - in new process contract */
...
}
...

Example 2: Clear the process contract template.

The following example opens the template file and requests that the
active template be cleared.

#include <libcontract.h>
#include <fcntl.h>

...
int fd;

fd = open("/system/contract/process/template", O_RDWR);
(void) ct_tmpl_clear(fd);
close(fd);
...

ATTRIBUTES