core.5 (6cec9cad762b6476313fb1f8e931a1647822db6b) core.5 (aa14e9b7c9d90c2db81e29b3c68bcee6129b8b4c)
1.\" Copyright (c) 1980, 1991, 1993
2.\" The Regents of the University of California. All rights reserved.
3.\"
4.\" Redistribution and use in source and binary forms, with or without
5.\" modification, are permitted provided that the following conditions
6.\" are met:
7.\" 1. Redistributions of source code must retain the above copyright
8.\" notice, this list of conditions and the following disclaimer.

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23.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26.\" SUCH DAMAGE.
27.\"
28.\" @(#)core.5 8.3 (Berkeley) 12/11/93
29.\" $FreeBSD$
30.\"
1.\" Copyright (c) 1980, 1991, 1993
2.\" The Regents of the University of California. All rights reserved.
3.\"
4.\" Redistribution and use in source and binary forms, with or without
5.\" modification, are permitted provided that the following conditions
6.\" are met:
7.\" 1. Redistributions of source code must retain the above copyright
8.\" notice, this list of conditions and the following disclaimer.

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23.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26.\" SUCH DAMAGE.
27.\"
28.\" @(#)core.5 8.3 (Berkeley) 12/11/93
29.\" $FreeBSD$
30.\"
31.Dd November 22, 2012
31.Dd March 8, 2015
32.Dt CORE 5
33.Os
34.Sh NAME
35.Nm core
36.Nd memory image file format
37.Sh SYNOPSIS
38.In sys/param.h
39.Sh DESCRIPTION

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96real or effective will not create a corefile.
97This behaviour can be
98changed to generate a core dump by setting the
99.Xr sysctl 8
100variable
101.Va kern.sugid_coredump
102to 1.
103.Pp
32.Dt CORE 5
33.Os
34.Sh NAME
35.Nm core
36.Nd memory image file format
37.Sh SYNOPSIS
38.In sys/param.h
39.Sh DESCRIPTION

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96real or effective will not create a corefile.
97This behaviour can be
98changed to generate a core dump by setting the
99.Xr sysctl 8
100variable
101.Va kern.sugid_coredump
102to 1.
103.Pp
104Corefiles can be compressed by the kernel if the following items
105are included in the kernel configuration file:
104Corefiles can be compressed by the kernel if the following item
105is included in the kernel configuration file:
106.Bl -tag -width "1234567890" -compact -offset "12345"
107.It options
106.Bl -tag -width "1234567890" -compact -offset "12345"
107.It options
108COMPRESS_USER_CORES
109.It devices
110gzio
108GZIO
111.El
112.Pp
109.El
110.Pp
113When COMPRESS_USER_CORES is included the following sysctls can control
114if core files will be compressed:
111When the GZIO option is included, the following sysctls control whether core
112files will be compressed:
115.Bl -tag -width "kern.compress_user_cores_gzlevel" -compact -offset "12345"
116.It Em kern.compress_user_cores_gzlevel
117Gzip compression level.
113.Bl -tag -width "kern.compress_user_cores_gzlevel" -compact -offset "12345"
114.It Em kern.compress_user_cores_gzlevel
115Gzip compression level.
118Defaults to -1.
116Defaults to 6.
119.It Em kern.compress_user_cores
120Actually compress user cores.
117.It Em kern.compress_user_cores
118Actually compress user cores.
121Core files will have the suffix
122.Em .gz
119Compressed core files will have a suffix of
120.Ql .gz
123appended to them.
124.El
125.Sh EXAMPLES
126In order to store all core images in per-user private areas under
127.Pa /var/coredumps ,
128the following
129.Xr sysctl 8
130command can be used:

--- 13 unchanged lines hidden --- 		121appended to them.
122.El
123.Sh EXAMPLES
124In order to store all core images in per-user private areas under
125.Pa /var/coredumps ,
126the following
127.Xr sysctl 8
128command can be used:

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