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28 .\" @(#)core.5 8.3 (Berkeley) 12/11/93
29 .\" $FreeBSD: src/share/man/man5/core.5,v 1.8.2.5 2003/01/07 22:03:50 keramida Exp $
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37 .Nd memory image file format
41 A small number of signals which cause abnormal termination of a process
42 also cause a record of the process's in-core state to be written
43 to disk for later examination by one of the available debuggers.
46 This memory image is written to a file named by default
48 in the working directory;
49 provided the terminated process had write permission in the directory,
50 and provided the abnormality did not cause
52 (In this event, the decision to save the core file is arbitrary, see
55 The maximum size of a core file is limited by
57 Files which would be larger than the limit are not created.
59 The name of the file is controlled via the
63 The contents of this variable describes a filename to store
65 This filename can be absolute, or relative (which
66 will resolve to the current working directory of the program
70 in this filename template will be replaced by the process name,
72 by the processes PID, and
77 yielding the traditional
81 By default, a process that changes user or group credentials whether
82 real or effective will not create a corefile.
84 changed to generate a core dump by setting the
87 .Va kern.sugid_coredump
90 The core file consists of the
92 area, whose size (in pages) is
102 structure as given in
104 The remainder of the core
105 file consists of the data pages followed by
106 the stack pages of the process image.
107 The amount of data space image in the core
108 file is given (in pages) by the
114 The amount of stack image in the core file is given (in pages) by the
120 The size of a ``page'' is given by the constant
125 In order to store all core images in per-user private areas under
131 .Dl sysctl kern.corefile="/var/coredumps/\&%U/\&%N.core"
141 file format appeared in