.\"
.\" This file and its contents are supplied under the terms of the
.\" Common Development and Distribution License ("CDDL"), version 1.0.
.\" You may only use this file in accordance with the terms of version
.\" 1.0 of the CDDL.
.\"
.\" A full copy of the text of the CDDL should have accompanied this
.\" source.  A copy of the CDDL is also available via the Internet at
.\" http://www.illumos.org/license/CDDL.
.\"
.\"
.\" Copyright 2015 Joyent, Inc.
.\"
.Dd November 27, 2023
.Dt PR_GETZONEID 3PROC
.Os
.Sh NAME
.Nm pr_getzoneid
.Nd inject getzoneid system call into victim process
.Sh LIBRARY
.Lb libproc
.Sh SYNOPSIS
.In libproc.h
.Ft zoneid_t
.Fo pr_getzoneid
.Fa "struct ps_prochandle *P"
.Fc
.Sh DESCRIPTION
The
.Fn pr_getzoneid
function injects the
.Xr getzoneid 3C
system call into the target process
.Fa P
by means of the agent LWP.
If the process handle
.Fa P
is the value
.Dv NULL
then this will be equivalent to calling
.Xr getzoneid 3C
on the currently running process.
.Pp
The
.Fn pr_getzoneid
function only works on active processes.
Process handles that correspond to core files, zombie processes, or ELF objects
do not support system call injection.
.Sh RETURN VALUES
Upon successful completion, the
.Fn pr_getzoneid
function's return value is that described in
.Xr getzoneid 3C .
Otherwise,
.Sy -1
is returned and
.Sy errno
is set to
.Er ENOSYS
to indicate that the system call could not be injected.
.Sh ERRORS
For the full list of errors see the
.Sy ERRORS
section in
.Xr getzoneid 3C .
.Pp
The
.Fn pr_getzoneid
function will fail if:
.Bl -tag -width Er
.It Er ENOSYS
An error occurred while trying to invoke the agent LWP and inject a
system call in the process handle
.Fa P
or the process handle
.Fa P
does not support system call injection.
.El
.Sh INTERFACE STABILITY
.Sy Uncommitted
.Sh MT-LEVEL
See
.Sy LOCKING
in
.Xr libproc 3LIB .
.Sh SEE ALSO
.Xr getzoneid 3C ,
.Xr libproc 3LIB ,
.Xr proc 5