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 60 struct jmploc { 61 jmp_buf loc; 62 }; 63 64 extern struct jmploc *handler; 65 extern int exception; 66 extern 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 82 extern volatile int suppressint; 83 extern 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 91 void exraise(int) __attribute__((__noreturn__)); 92 void onint(void); 93 void error(const char *, ...) __attribute__((__noreturn__)); 94 void exerror(int, const char *, ...) __attribute__((__noreturn__)); 95 const char *errmsg(int, int); 96 97 void sh_err(int, const char *, ...) __attribute__((__noreturn__)); 98 void sh_verr(int, const char *, va_list) __attribute__((__noreturn__)); 99 void sh_errx(int, const char *, ...) __attribute__((__noreturn__)); 100 void sh_verrx(int, const char *, va_list) __attribute__((__noreturn__)); 101 void sh_warn(const char *, ...); 102 void sh_vwarn(const char *, va_list); 103 void sh_warnx(const char *, ...); 104 void sh_vwarnx(const char *, va_list); 105 106 void 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