| protect.1 (416ba5c74546f32a993436a99516d35008e9f384) | protect.1 (c8b6be0f7d1b92d11b279761685f61f6702700a1) |
|---|---|
| 1.\" Copyright (c) 2013 Hudson River Trading LLC 2.\" Written by: John H. Baldwin <jhb@FreeBSD.org> 3.\" All rights reserved. 4.\" 5.\" Redistribution and use in source and binary forms, with or without 6.\" modification, are permitted provided that the following conditions 7.\" are met: 8.\" 1. Redistributions of source code must retain the above copyright --- 11 unchanged lines hidden (view full) --- 20.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24.\" SUCH DAMAGE. 25.\" 26.\" $FreeBSD$ 27.\" | 1.\" Copyright (c) 2013 Hudson River Trading LLC 2.\" Written by: John H. Baldwin <jhb@FreeBSD.org> 3.\" All rights reserved. 4.\" 5.\" Redistribution and use in source and binary forms, with or without 6.\" modification, are permitted provided that the following conditions 7.\" are met: 8.\" 1. Redistributions of source code must retain the above copyright --- 11 unchanged lines hidden (view full) --- 20.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24.\" SUCH DAMAGE. 25.\" 26.\" $FreeBSD$ 27.\" |
| 28.Dd September 19, 2013 | 28.Dd May 18, 2021 |
| 29.Dt PROTECT 1 30.Os 31.Sh NAME 32.Nm protect 33.Nd "protect processes from being killed when swap space is exhausted" 34.Sh SYNOPSIS 35.Nm 36.Op Fl i --- 26 unchanged lines hidden (view full) --- 63as a protected process. 64.El 65.Pp 66Note that only one of the 67.Fl p 68or 69.Fl g 70flags may be specified when adjusting the state of existing processes. | 29.Dt PROTECT 1 30.Os 31.Sh NAME 32.Nm protect 33.Nd "protect processes from being killed when swap space is exhausted" 34.Sh SYNOPSIS 35.Nm 36.Op Fl i --- 26 unchanged lines hidden (view full) --- 63as a protected process. 64.El 65.Pp 66Note that only one of the 67.Fl p 68or 69.Fl g 70flags may be specified when adjusting the state of existing processes. |
| 71.Pp 72Daemons can be protected on startup using 73.Ao Ar name Ac Ns Va _oomprotect 74option from 75.Xr rc.conf 5 . |
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| 71.Sh EXIT STATUS 72.Ex -std 73.Sh EXAMPLES 74Mark the Xorg server as protected: 75.Pp 76.Dl "pgrep Xorg | xargs protect -p" 77.Pp 78Protect all ssh sessions and their child processes: 79.Pp 80.Dl "pgrep sshd | xargs protect -dip" 81.Pp 82Remove protection from all current and future processes: 83.Pp 84.Dl "protect -cdi -p 1" | 76.Sh EXIT STATUS 77.Ex -std 78.Sh EXAMPLES 79Mark the Xorg server as protected: 80.Pp 81.Dl "pgrep Xorg | xargs protect -p" 82.Pp 83Protect all ssh sessions and their child processes: 84.Pp 85.Dl "pgrep sshd | xargs protect -dip" 86.Pp 87Remove protection from all current and future processes: 88.Pp 89.Dl "protect -cdi -p 1" |
| 90.Pp 91Using 92.Xr ps 1 93to check if the protect flag has been applied to the process: 94.Pp 95.Dl "ps -O flags,flags2 -p 64430" 96.Pp 97.Dl " PID F F2 TT STAT TIME COMMAND" 98.Dl "64430 10104002 00000001 5 S+ 0:00.00 ./main" 99.Dl " ^P ^PI" 100.Pp 101In the above example 102.Nm P 103points at the protected flag and 104.Nm PI 105points at the iheritance flag. 106The process is protected if 107.Nm P 108bit is set to 1. All children of this process will also be protected if 109.Nm PI 110bit is set to 1. |
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| 85.Sh SEE ALSO | 111.Sh SEE ALSO |
| 86.Xr procctl 2 | 112.Xr ps 1 , 113.Xr procctl 2 , 114.Xr rc.conf 5 |
| 87.Sh BUGS 88If you protect a runaway process that allocates all memory the system will 89deadlock. | 115.Sh BUGS 116If you protect a runaway process that allocates all memory the system will 117deadlock. |