mirror of
https://github.com/freebsd/freebsd-src.git
synced 2024-11-30 10:52:50 +00:00
144 lines
3.9 KiB
Groff
144 lines
3.9 KiB
Groff
.\" Copyright (c) 2019 The FreeBSD Foundation
|
|
.\"
|
|
.\" This documentation was written by
|
|
.\" Konstantin Belousov <kib@FreeBSD.org> under sponsorship
|
|
.\" from the FreeBSD Foundation.
|
|
.\"
|
|
.\" 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.
|
|
.\"
|
|
.Dd August 23, 2024
|
|
.Dt PROCCONTROL 1
|
|
.Os
|
|
.Sh NAME
|
|
.Nm proccontrol
|
|
.Nd Control some process execution aspects
|
|
.Sh SYNOPSIS
|
|
.Nm
|
|
.Fl m Ar mode
|
|
.Fl s Ar control
|
|
.Fl p Ar pid | command
|
|
.Nm
|
|
.Fl m Ar mode
|
|
.Fl q
|
|
.Op Fl p Ar pid | command
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Nm
|
|
command modifies the execution parameter of existing process
|
|
specified by the
|
|
.Ar pid
|
|
argument, or starts execution of the new program
|
|
.Ar command
|
|
with the execution parameter set for it.
|
|
.Pp
|
|
Which execution parameter is changed, selected by the mandatory
|
|
parameter
|
|
.Ar mode .
|
|
Possible values for
|
|
.Ar mode
|
|
are:
|
|
.Bl -tag -width trapcap
|
|
.It Ar aslr
|
|
Control the Address Space Layout Randomization.
|
|
Only applicable to the new process spawned.
|
|
.It Ar trace
|
|
Control the permission for debuggers to attach.
|
|
Note that process is only allowed to enable tracing for itself,
|
|
not for any other process.
|
|
.It Ar trapcap
|
|
Controls the signalling of capability mode access violations.
|
|
.It Ar protmax
|
|
Controls the implicit PROT_MAX application for
|
|
.Xr mmap 2 .
|
|
.It Ar nonewprivs
|
|
Controls disabling the setuid and sgid bits for
|
|
.Xr execve 2 .
|
|
.It Ar wxmap
|
|
Controls the write exclusive execute mode for mappings.
|
|
.It Ar kpti
|
|
Controls the KPTI enable, AMD64 only.
|
|
.It Ar la48
|
|
Control limiting usermode process address space to 48 bits of address,
|
|
AMD64 only, on machines capable of 57-bit addressing.
|
|
.El
|
|
.Pp
|
|
The
|
|
.Ar control
|
|
specifies if the selected
|
|
.Ar mode
|
|
should be enabled or disabled.
|
|
Possible values are
|
|
.Ar enable
|
|
and
|
|
.Ar disable ,
|
|
with the default value being
|
|
.Ar enable
|
|
if not specified.
|
|
See
|
|
.Xr procctl 2
|
|
for detailed description of each mode effects and interaction with other
|
|
process control facilities.
|
|
.Pp
|
|
The
|
|
.Fl q
|
|
switch makes the utility query and print the current setting for
|
|
the selected mode.
|
|
The
|
|
.Fl q
|
|
requires the query target process specification with
|
|
.Fl p .
|
|
.Sh EXIT STATUS
|
|
.Ex -std
|
|
.Sh EXAMPLES
|
|
.Bl -bullet
|
|
.It
|
|
To disable debuggers attachment to the process 1020, execute
|
|
.Dl "proccontrol -m trace -s disable -p 1020"
|
|
.It
|
|
To execute the
|
|
.Xr uniq 1
|
|
program in a mode where capability access violations cause
|
|
.Dv SIGTRAP
|
|
delivery, do
|
|
.Dl "proccontrol -m trapcap uniq"
|
|
.It
|
|
To query the current ASLR enablement mode for the running
|
|
process 1020, do
|
|
.Dl "proccontrol -m aslr -q -p 1020"
|
|
.El
|
|
.Sh SEE ALSO
|
|
.Xr kill 2 ,
|
|
.Xr procctl 2 ,
|
|
.Xr ptrace 2 ,
|
|
.Xr mitigations 7
|
|
.Sh HISTORY
|
|
The
|
|
.Nm
|
|
command appeared in
|
|
.Fx 10.0 .
|
|
.Sh AUTHORS
|
|
The
|
|
.Nm
|
|
command and this manual page were written by
|
|
.An Konstantin Belousov Aq Mt kib@freebsd.org
|
|
under sponsorship from The FreeBSD Foundation.
|