fbbd9655e5
Renumber cluase 4 to 3, per what everybody else did when BSD granted them permission to remove clause 3. My insistance on keeping the same numbering for legal reasons is too pedantic, so give up on that point. Submitted by: Jan Schaumann <jschauma@stevens.edu> Pull Request: https://github.com/freebsd/freebsd/pull/96
96 lines
3.6 KiB
C
96 lines
3.6 KiB
C
/*-
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* Copyright (c) 1991, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Kenneth Almquist.
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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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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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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*
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* @(#)error.h 8.2 (Berkeley) 5/4/95
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* $FreeBSD$
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*/
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/*
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* We enclose jmp_buf in a structure so that we can declare pointers to
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* jump locations. The global variable handler contains the location to
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* jump to when an exception occurs, and the global variable exception
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* contains a code identifying the exception. To implement nested
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* exception handlers, the user should save the value of handler on entry
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* to an inner scope, set handler to point to a jmploc structure for the
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* inner scope, and restore handler on exit from the scope.
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*/
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#include <setjmp.h>
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#include <signal.h>
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struct jmploc {
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jmp_buf loc;
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};
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extern struct jmploc *handler;
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extern volatile sig_atomic_t exception;
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/* exceptions */
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#define EXINT 0 /* SIGINT received */
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#define EXERROR 1 /* a generic error */
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#define EXEXEC 2 /* command execution failed */
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#define EXEXIT 3 /* call exitshell(exitstatus) */
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/*
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* These macros allow the user to suspend the handling of interrupt signals
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* over a period of time. This is similar to SIGHOLD to or sigblock, but
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* much more efficient and portable. (But hacking the kernel is so much
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* more fun than worrying about efficiency and portability. :-))
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*/
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extern volatile sig_atomic_t suppressint;
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extern volatile sig_atomic_t intpending;
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#define INTOFF suppressint++
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#define INTON { if (--suppressint == 0 && intpending) onint(); }
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#define is_int_on() suppressint
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#define SETINTON(s) suppressint = (s)
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#define FORCEINTON {suppressint = 0; if (intpending) onint();}
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#define SET_PENDING_INT intpending = 1
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#define CLEAR_PENDING_INT intpending = 0
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#define int_pending() intpending
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void exraise(int) __dead2;
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void onint(void) __dead2;
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void warning(const char *, ...) __printflike(1, 2);
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void error(const char *, ...) __printf0like(1, 2) __dead2;
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void exerror(int, const char *, ...) __printf0like(2, 3) __dead2;
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/*
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* BSD setjmp saves the signal mask, which violates ANSI C and takes time,
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* so we use _setjmp instead.
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*/
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#define setjmp(jmploc) _setjmp(jmploc)
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#define longjmp(jmploc, val) _longjmp(jmploc, val)
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