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Copyright (c) 1996 Sun Microsystems, Inc. All Rights Reserved
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You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE or http://www.opensolaris.org/os/licensing. See the License for the specific language governing permissions and limitations under the License.
When distributing Covered Code, include this CDDL HEADER in each file and include the License file at usr/src/OPENSOLARIS.LICENSE. If applicable, add the following below this CDDL HEADER, with the fields enclosed by brackets "[]" replaced with your own identifying information: Portions Copyright [yyyy] [name of copyright owner]
tnfctl_kernel_open - create handle for kernel probe control

cc [ flag ... ] file ... -ltnfctl [ library ... ]
#include <tnf/tnfctl.h>



tnfctl_errcode_t tnfctl_kernel_open(tnfctl_handle_t **ret_val);

tnfctl_kernel_open() starts a kernel tracing session and returns in ret_val an opaque handle that can be used to control tracing and probes in the kernel. Only one kernel tracing session is possible at a time on a given machine. An error code of TNFCTL_ERR_BUSY is returned if there is another process using kernel tracing. Use the command

fuser -f /dev/tnfctl

to print the process id of the process currently using kernel tracing. Only a superuser may use tnfctl_kernel_open(). An error code of TNFCTL_ERR_ACCES is returned if the caller does not have the necessary privileges.

tnfctl_kernel_open returns TNFCTL_ERR_NONE upon success.

TNFCTL_ERR_ACCES TNFCTL_ERR_BUSY TNFCTL_ERR_ALLOCFAIL TNFCTL_ERR_FILENOTFOUND TNFCTL_ERR_INTERNAL

See attributes(5) for descriptions of the following attributes:

ATTRIBUTE TYPE ATTRIBUTE VALUE

MT Level MT-Safe

prex(1), fuser(1M), TNF_PROBE(3TNF), libtnfctl(3TNF), tracing(3TNF), tnf_kernel_probes(4), attributes(5)