1.\" Copyright (c) 2019 The FreeBSD Foundation, Inc. 2.\" All rights reserved. 3.\" 4.\" This documentation was written by 5.\" Konstantin Belousov <kib@FreeBSD.org> under sponsorship 6.\" from the FreeBSD Foundation. 7.\" 8.\" Redistribution and use in source and binary forms, with or without 9.\" modification, are permitted provided that the following conditions 10.\" are met: 11.\" 1. Redistributions of source code must retain the above copyright 12.\" notice, this list of conditions and the following disclaimer. 13.\" 2. Redistributions in binary form must reproduce the above copyright 14.\" notice, this list of conditions and the following disclaimer in the 15.\" documentation and/or other materials provided with the distribution. 16.\" 17.\" THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 18.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE 21.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27.\" SUCH DAMAGE. 28.\" 29.\" $FreeBSD$ 30.\" 31.Dd February 22, 2019 32.Dt PROCCONTROL 1 33.Os 34.Sh NAME 35.Nm proccontrol 36.Nd Control some process execution aspects 37.Sh SYNOPSIS 38.Nm 39.Fl m Ar mode 40.Op Fl s Ar control 41.Op Fl q 42.Fl p Ar pid | command 43.Sh DESCRIPTION 44The 45.Nm 46command modifies the execution parameter of existing process 47specified by the 48.Ar pid 49argument, or starts execution of the new program 50.Ar command 51with the execution parameter set for it. 52.Pp 53Which execution parameter is changed, selected by the mandatory 54parameter 55.Ar mode . 56Possible values for 57.Ar mode 58are: 59.Bl -tag -width trapcap 60.It Ar aslr 61Control the Address Space Layout Randomization. 62Only applicable to the new process spawned. 63.It Ar trace 64Control the permission for debuggers to attach. 65.It Ar trapcap 66Controls the signalling of capability mode access violations. 67.El 68.Pp 69The 70Ar control 71specifies if the selected 72.Ar mode 73should be enabled or disabled. 74Possible values are 75.Ar enable 76and 77.Ar disable , 78with the default value being 79.Ar enable 80if not specified. 81See 82.Xr procctl 2 83for detailed description of each mode effects and interaction with other 84process control facilities. 85.Pp 86The 87.Op Fl q 88switch makes the utility query and print the current setting for 89the selected mode. 90.Sh EXIT STATUS 91.Ex -std 92.Sh EXAMPLES 93.Bl -bullet 94.It 95To disable debuggers attachment to the process 1020, execute 96.Dl "proccontrol -m trace -s disable -p 1020" 97.It 98To execute the 99.Xr uniq 1 100program in a mode where capability access violations cause 101.Dv SIGTRAP 102delivery, do 103.Dl "proccontrol -m trapcap uniq" 104.It 105To query the current ASLR enablement mode for the running 106process 1020, do 107.Dl "proccontrol -m aslr -q -p 1020" 108.El 109.Sh SEE ALSO 110.Xr kill 2 , 111.Xr procctl 2 , 112.Xr ptrace 2 113.Sh HISTORY 114The 115.Nm 116command appeared in 117.Fx 10.0 . 118.Sh AUTHORS 119The 120.Nm 121command and this manual page were written by 122.An Konstantin Belousov Aq Mt kib@freebsd.org 123under sponsorship from The FreeBSD Foundation. 124