2005-12-23 12:27:42 +00:00
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.\" Copyright (c) 2005 Wojciech A. Koszek <dunstan@FreeBSD.czest.pl>
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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2006-09-30 10:24:00 +00:00
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.\"
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2005-12-23 12:27:42 +00:00
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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2006-09-30 10:24:00 +00:00
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.\"
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2005-12-23 12:27:42 +00:00
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.\" $FreeBSD$
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2006-09-30 10:24:00 +00:00
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.\"
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.Dd September 30, 2006
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.Dt ABORT2 2
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2005-12-23 12:27:42 +00:00
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.Os
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.Sh NAME
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.Nm abort2
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.Nd "abort process with diagnostics"
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2005-12-23 12:27:42 +00:00
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.Sh LIBRARY
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.Lb libc
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.Sh SYNOPSIS
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.In stdlib.h
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.Ft void
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.Fn abort2 "const char *why" "int nargs" "void **args"
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.Sh DESCRIPTION
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The
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.Fn abort2
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system call causes the process to be killed and the specified diagnostic
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message (with arguments) to be delivered by the kernel to the
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.Xr syslogd 8
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daemon.
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.Pp
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The
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.Fa why
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argument points to a
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.Dv NUL- Ns
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terminated string specifying a reason of the program's termination
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(maximum 128 characters long).
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The
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.Fa args
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array contains pointers which will be logged numerically
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(with the kernel's
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.Ql %p
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.Xr printf 9
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format).
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The
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.Fa nargs
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argument specifies the number of pointers in
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.Fa args
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(maximum 16).
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.Pp
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The
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.Fn abort2
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2006-09-30 10:24:00 +00:00
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system call
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is intended for use in situations where continuation of a process
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is impossible or for other definitive reasons is unwanted, and normal
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diagnostic channels cannot be trusted to deliver the message.
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.Sh RETURN VALUES
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The
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.Fn abort2
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function
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never returns.
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.Pp
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The process is killed with
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.Dv SIGABRT
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unless the arguments to
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.Fn abort2
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are invalid, in which case
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.Dv SIGKILL
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is used.
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.Sh EXAMPLES
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.Bd -literal -compact
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#include <stdlib.h>
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if (weight_kg > max_load) {
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void *ptrs[3];
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2006-09-30 10:24:00 +00:00
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ptrs[0] = (void *)(intptr_t)weight_kg;
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ptrs[1] = (void *)(intptr_t)max_load;
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ptrs[2] = haystack;
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abort2("Camel overloaded", 3, ptrs);
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}
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.Ed
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.Sh SEE ALSO
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2006-09-30 10:24:00 +00:00
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.Xr abort 3 ,
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.Xr exit 3
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.Sh HISTORY
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The
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.Fn abort2
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system call first appeared in
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.Fx 7.0 .
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.Sh AUTHORS
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2006-09-30 10:24:00 +00:00
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.An -nosplit
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The
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.Fn abort2
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system call was designed by
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2014-06-23 08:25:03 +00:00
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.An Poul-Henning Kamp Aq Mt phk@FreeBSD.org .
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2006-09-30 10:24:00 +00:00
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It was implemented by
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2014-06-23 08:25:03 +00:00
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.An Wojciech A. Koszek Aq Mt dunstan@freebsd.czest.pl .
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