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2714 | cejka | 1 | /* $NetBSD: error.h,v 1.13 1999/07/09 03:05:49 christos Exp $ */ |
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3 | /*- |
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4 | * Copyright (c) 1991, 1993 |
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5 | * The Regents of the University of California. All rights reserved. |
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6 | * |
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7 | * This code is derived from software contributed to Berkeley by |
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8 | * Kenneth Almquist. |
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9 | * |
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10 | * Redistribution and use in source and binary forms, with or without |
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11 | * modification, are permitted provided that the following conditions |
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12 | * are met: |
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13 | * 1. Redistributions of source code must retain the above copyright |
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14 | * notice, this list of conditions and the following disclaimer. |
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15 | * 2. Redistributions in binary form must reproduce the above copyright |
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16 | * notice, this list of conditions and the following disclaimer in the |
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17 | * documentation and/or other materials provided with the distribution. |
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18 | * 3. All advertising materials mentioning features or use of this software |
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19 | * must display the following acknowledgement: |
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20 | * This product includes software developed by the University of |
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21 | * California, Berkeley and its contributors. |
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22 | * 4. Neither the name of the University nor the names of its contributors |
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23 | * may be used to endorse or promote products derived from this software |
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24 | * without specific prior written permission. |
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25 | * |
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26 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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27 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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28 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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29 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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30 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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31 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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32 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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33 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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34 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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35 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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36 | * SUCH DAMAGE. |
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37 | * |
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38 | * @(#)error.h 8.2 (Berkeley) 5/4/95 |
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39 | */ |
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40 | |||
41 | /* |
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42 | * Types of operations (passed to the errmsg routine). |
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43 | */ |
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44 | |||
45 | #define E_OPEN 01 /* opening a file */ |
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46 | #define E_CREAT 02 /* creating a file */ |
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47 | #define E_EXEC 04 /* executing a program */ |
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48 | |||
49 | |||
50 | /* |
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51 | * We enclose jmp_buf in a structure so that we can declare pointers to |
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52 | * jump locations. The global variable handler contains the location to |
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53 | * jump to when an exception occurs, and the global variable exception |
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54 | * contains a code identifying the exeception. To implement nested |
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55 | * exception handlers, the user should save the value of handler on entry |
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56 | * to an inner scope, set handler to point to a jmploc structure for the |
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57 | * inner scope, and restore handler on exit from the scope. |
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58 | */ |
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59 | |||
60 | #include <setjmp.h> |
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61 | #include "fake.h" |
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62 | |||
63 | struct jmploc { |
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64 | jmp_buf loc; |
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65 | }; |
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66 | |||
67 | extern struct jmploc *handler; |
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68 | extern int exception; |
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69 | |||
70 | /* exceptions */ |
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71 | #define EXINT 0 /* SIGINT received */ |
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72 | #define EXERROR 1 /* a generic error */ |
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73 | #define EXSHELLPROC 2 /* execute a shell procedure */ |
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74 | #define EXEXEC 3 /* command execution failed */ |
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75 | |||
76 | |||
77 | /* |
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78 | * These macros allow the user to suspend the handling of interrupt signals |
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79 | * over a period of time. This is similar to SIGHOLD to or sigblock, but |
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80 | * much more efficient and portable. (But hacking the kernel is so much |
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81 | * more fun than worrying about efficiency and portability. :-)) |
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82 | */ |
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83 | |||
84 | extern volatile int suppressint; |
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85 | extern volatile int intpending; |
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86 | extern char *commandname; /* name of command--printed on error */ |
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87 | |||
88 | #define INTOFF suppressint++ |
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89 | #define INTON { if (--suppressint == 0 && intpending) onint(); } |
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90 | #define FORCEINTON {suppressint = 0; if (intpending) onint();} |
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91 | #define CLEAR_PENDING_INT intpending = 0 |
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92 | #define int_pending() intpending |
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93 | |||
94 | void exraise (int) __attribute__((__noreturn__)); |
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95 | void onint (void); |
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96 | void error (const char *, ...) __attribute__((__noreturn__)); |
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97 | void exerror (int, const char *, ...) __attribute__((__noreturn__)); |
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98 | const char *errmsg (int, int); |
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99 | |||
100 | |||
101 | /* |
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102 | * BSD setjmp saves the signal mask, which violates ANSI C and takes time, |
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103 | * so we use _setjmp instead. |
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104 | */ |
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105 | |||
106 | #if defined(BSD) && !defined(__SVR4) && !defined(__GLIBC__) |
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107 | #define setjmp(jmploc) _setjmp(jmploc) |
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108 | #define longjmp(jmploc, val) _longjmp(jmploc, val) |
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109 | #endif |