1 /* $NetBSD: error.h,v 1.7 1995/03/21 09:08:52 cgd 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. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)error.h 8.1 (Berkeley) 5/31/93 39 */ 40 41 /* 42 * Types of operations (passed to the errmsg routine). 43 */ 44 45 #define E_OPEN 01 /* opening a file */ 46 #define E_CREAT 02 /* creating a file */ 47 #define E_EXEC 04 /* executing a program */ 48 49 50 /* 51 * We enclose jmp_buf in a structure so that we can declare pointers to 52 * jump locations. The global variable handler contains the location to 53 * jump to when an exception occurs, and the global variable exception 54 * contains a code identifying the exeception. To implement nested 55 * exception handlers, the user should save the value of handler on entry 56 * to an inner scope, set handler to point to a jmploc structure for the 57 * inner scope, and restore handler on exit from the scope. 58 */ 59 60 #include <setjmp.h> 61 62 struct jmploc { 63 jmp_buf loc; 64 }; 65 66 extern struct jmploc *handler; 67 extern int exception; 68 69 /* exceptions */ 70 #define EXINT 0 /* SIGINT received */ 71 #define EXERROR 1 /* a generic error */ 72 #define EXSHELLPROC 2 /* execute a shell procedure */ 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 82 extern volatile int suppressint; 83 extern volatile int intpending; 84 extern char *commandname; /* name of command--printed on error */ 85 86 #define INTOFF suppressint++ 87 #define INTON if (--suppressint == 0 && intpending) onint(); else 88 #define FORCEINTON {suppressint = 0; if (intpending) onint();} 89 #define CLEAR_PENDING_INT intpending = 0 90 #define int_pending() intpending 91 92 #ifdef __STDC__ 93 void exraise(int); 94 void onint(void); 95 void error2(char *, char *); 96 void error(char *, ...); 97 char *errmsg(int, int); 98 #else 99 void exraise(); 100 void onint(); 101 void error2(); 102 void error(); 103 char *errmsg(); 104 #endif 105 106 107 /* 108 * BSD setjmp saves the signal mask, which violates ANSI C and takes time, 109 * so we use _setjmp instead. 110 */ 111 112 #ifdef BSD 113 #define setjmp(jmploc) _setjmp(jmploc) 114 #define longjmp(jmploc, val) _longjmp(jmploc, val) 115 #endif 116