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  1. /*  $NetBSD: error.h,v 1.13 1999/07/09 03:05:49 christos 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 8.2 (Berkeley) 5/4/95
  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. #include "fake.h"
  62.  
  63. struct jmploc {
  64.     jmp_buf loc;
  65. };
  66.  
  67. extern struct jmploc *handler;
  68. extern int exception;
  69.  
  70. /* exceptions */
  71. #define EXINT 0     /* SIGINT received */
  72. #define EXERROR 1   /* a generic error */
  73. #define EXSHELLPROC 2   /* execute a shell procedure */
  74. #define EXEXEC 3    /* command execution failed */
  75.  
  76.  
  77. /*
  78.  * These macros allow the user to suspend the handling of interrupt signals
  79.  * over a period of time.  This is similar to SIGHOLD to or sigblock, but
  80.  * much more efficient and portable.  (But hacking the kernel is so much
  81.  * more fun than worrying about efficiency and portability. :-))
  82.  */
  83.  
  84. extern volatile int suppressint;
  85. extern volatile int intpending;
  86. extern char *commandname;   /* name of command--printed on error */
  87.  
  88. #define INTOFF suppressint++
  89. #define INTON { if (--suppressint == 0 && intpending) onint(); }
  90. #define FORCEINTON {suppressint = 0; if (intpending) onint();}
  91. #define CLEAR_PENDING_INT intpending = 0
  92. #define int_pending() intpending
  93.  
  94. void exraise (int) __attribute__((__noreturn__));
  95. void onint (void);
  96. void error (const char *, ...) __attribute__((__noreturn__));
  97. void exerror (int, const char *, ...) __attribute__((__noreturn__));
  98. const char *errmsg (int, int);
  99.  
  100.  
  101. /*
  102.  * BSD setjmp saves the signal mask, which violates ANSI C and takes time,
  103.  * so we use _setjmp instead.
  104.  */
  105.  
  106. #if defined(BSD) && !defined(__SVR4) && !defined(__GLIBC__)
  107. #define setjmp(jmploc)  _setjmp(jmploc)
  108. #define longjmp(jmploc, val)    _longjmp(jmploc, val)
  109. #endif
  110.