1.\" Copyright (c) 1983, 1990, 1992, 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. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 3. All advertising materials mentioning features or use of this software 13.\" must display the following acknowledgement: 14.\" This product includes software developed by the University of 15.\" California, Berkeley and its contributors. 16.\" 4. Neither the name of the University nor the names of its contributors 17.\" may be used to endorse or promote products derived from this software 18.\" without specific prior written permission. 19.\" 20.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30.\" SUCH DAMAGE. 31.\" 32.\" @(#)gcore.1 8.2 (Berkeley) 4/18/94 33.\" $FreeBSD$ 34.\" 35.Dd November 18, 2009 36.Dt GCORE 1 37.Os 38.Sh NAME 39.Nm gcore 40.Nd get core images of running process 41.Sh SYNOPSIS 42.Nm 43.Op Fl s 44.Op Fl c Ar core 45.Op Ar executable 46.Ar pid 47.Sh DESCRIPTION 48The 49.Nm 50utility creates a core image of the specified process, 51suitable for use with 52.Xr gdb 1 . 53By default, the core is written to the file 54.Dq Pa core.<pid> . 55The process identifier, 56.Ar pid , 57must be given on the command line. 58.Pp 59The following options are available: 60.Bl -tag -width indent 61.It Fl c 62Write the core file to the specified file instead of 63.Dq Pa core.<pid> . 64.It Fl s 65Stop the process while gathering the core image, and resume it 66when done. 67This guarantees that the resulting core dump will 68be in a consistent state. 69The process is resumed even if it was 70already stopped. 71The same effect can be achieved manually with 72.Xr kill 1 . 73.El 74.Sh FILES 75.Bl -tag -width /var/log/messages -compact 76.It Pa core.<pid> 77the core image 78.El 79.Sh HISTORY 80A 81.Nm 82utility appeared in 83.Bx 4.2 . 84.Sh BUGS 85Because of the 86.Xr ptrace 2 87usage 88.Nm 89may not work with processes which are actively investigated with 90.Xr truss 1 91or 92.Xr gdb 1 . 93Additionally, interruptable sleeps may exit with EINTR. 94.Pp 95The 96.Nm 97utility is not compatible with the original 98.Bx 4.2 99version. 100