1/*	$NetBSD: error.h,v 1.16 2003/08/07 09:05:30 agc Exp $	*/
2
3/*-
4 * Copyright (c) 1991, 1993
5 *	The Regents of the University of California.  All rights reserved.
6 *
7 * This code is derived from software contributed to Berkeley by
8 * Kenneth Almquist.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the University nor the names of its contributors
19 *    may be used to endorse or promote products derived from this software
20 *    without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 *
34 *	@(#)error.h	8.2 (Berkeley) 5/4/95
35 */
36
37#include <stdarg.h>
38
39/*
40 * Types of operations (passed to the errmsg routine).
41 */
42
43#define E_OPEN 01	/* opening a file */
44#define E_CREAT 02	/* creating a file */
45#define E_EXEC 04	/* executing a program */
46
47
48/*
49 * We enclose jmp_buf in a structure so that we can declare pointers to
50 * jump locations.  The global variable handler contains the location to
51 * jump to when an exception occurs, and the global variable exception
52 * contains a code identifying the exeception.  To implement nested
53 * exception handlers, the user should save the value of handler on entry
54 * to an inner scope, set handler to point to a jmploc structure for the
55 * inner scope, and restore handler on exit from the scope.
56 */
57
58#include <setjmp.h>
59
60struct jmploc {
61	jmp_buf loc;
62};
63
64extern struct jmploc *handler;
65extern int exception;
66extern int exerrno;	/* error for EXEXEC */
67
68/* exceptions */
69#define EXINT 0		/* SIGINT received */
70#define EXERROR 1	/* a generic error */
71#define EXSHELLPROC 2	/* execute a shell procedure */
72#define EXEXEC 3	/* command execution failed */
73
74
75/*
76 * These macros allow the user to suspend the handling of interrupt signals
77 * over a period of time.  This is similar to SIGHOLD to or sigblock, but
78 * much more efficient and portable.  (But hacking the kernel is so much
79 * more fun than worrying about efficiency and portability. :-))
80 */
81
82extern volatile int suppressint;
83extern volatile int intpending;
84
85#define INTOFF suppressint++
86#define INTON { if (--suppressint == 0 && intpending) onint(); }
87#define FORCEINTON {suppressint = 0; if (intpending) onint();}
88#define CLEAR_PENDING_INT intpending = 0
89#define int_pending() intpending
90
91void exraise(int) __attribute__((__noreturn__));
92void onint(void);
93void error(const char *, ...) __attribute__((__noreturn__));
94void exerror(int, const char *, ...) __attribute__((__noreturn__));
95const char *errmsg(int, int);
96
97void sh_err(int, const char *, ...) __attribute__((__noreturn__));
98void sh_verr(int, const char *, va_list) __attribute__((__noreturn__));
99void sh_errx(int, const char *, ...) __attribute__((__noreturn__));
100void sh_verrx(int, const char *, va_list) __attribute__((__noreturn__));
101void sh_warn(const char *, ...);
102void sh_vwarn(const char *, va_list);
103void sh_warnx(const char *, ...);
104void sh_vwarnx(const char *, va_list);
105
106void sh_exit(int) __attribute__((__noreturn__));
107
108
109/*
110 * BSD setjmp saves the signal mask, which violates ANSI C and takes time,
111 * so we use _setjmp instead.
112 */
113
114#if defined(BSD) && !defined(__SVR4) && !defined(__linux__)
115#define setjmp(jmploc)	_setjmp(jmploc)
116#define longjmp(jmploc, val)	_longjmp(jmploc, val)
117#endif
118