projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 15637ed4 RG |
1 | /*- |
| 2 | * Copyright (c) 1991 The Regents of the University of California. | |
| 3 | * All rights reserved. | |
| 4 | * | |
| 5 | * This code is derived from software contributed to Berkeley by | |
| 6 | * Kenneth Almquist. | |
| 7 | * | |
| 8 | * Redistribution and use in source and binary forms, with or without | |
| 9 | * modification, are permitted provided that the following conditions | |
| 10 | * are met: | |
| 11 | * 1. Redistributions of source code must retain the above copyright | |
| 12 | * notice, this list of conditions and the following disclaimer. | |
| 13 | * 2. Redistributions in binary form must reproduce the above copyright | |
| 14 | * notice, this list of conditions and the following disclaimer in the | |
| 15 | * documentation and/or other materials provided with the distribution. | |
| 16 | * 3. All advertising materials mentioning features or use of this software | |
| 17 | * must display the following acknowledgement: | |
| 18 | * This product includes software developed by the University of | |
| 19 | * California, Berkeley and its contributors. | |
| 20 | * 4. Neither the name of the University nor the names of its contributors | |
| 21 | * may be used to endorse or promote products derived from this software | |
| 22 | * without specific prior written permission. | |
| 23 | * | |
| 24 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
| 25 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 26 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| 27 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
| 28 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
| 29 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
| 30 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
| 31 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
| 32 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
| 33 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
| 34 | * SUCH DAMAGE. | |
| 35 | * | |
| 78ed81a3 | 36 | * from: @(#)error.h 5.1 (Berkeley) 3/7/91 |
| 37 | * error.h,v 1.4 1993/08/01 18:58:32 mycroft Exp | |
| 15637ed4 RG |
38 | */ |
| 39 | ||
| 40 | /* | |
| 41 | * Types of operations (passed to the errmsg routine). | |
| 42 | */ | |
| 43 | ||
| 44 | #define E_OPEN 01 /* opening a file */ | |
| 45 | #define E_CREAT 02 /* creating a file */ | |
| 46 | #define E_EXEC 04 /* executing a program */ | |
| 47 | ||
| 48 | ||
| 49 | /* | |
| 50 | * We enclose jmp_buf in a structure so that we can declare pointers to | |
| 51 | * jump locations. The global variable handler contains the location to | |
| 52 | * jump to when an exception occurs, and the global variable exception | |
| 53 | * contains a code identifying the exeception. To implement nested | |
| 54 | * exception handlers, the user should save the value of handler on entry | |
| 55 | * to an inner scope, set handler to point to a jmploc structure for the | |
| 56 | * inner scope, and restore handler on exit from the scope. | |
| 57 | */ | |
| 58 | ||
| 59 | #include <setjmp.h> | |
| 60 | ||
| 61 | struct jmploc { | |
| 62 | jmp_buf loc; | |
| 63 | }; | |
| 64 | ||
| 65 | extern struct jmploc *handler; | |
| 66 | extern int exception; | |
| 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 | ||
| 73 | ||
| 74 | /* | |
| 75 | * These macros allow the user to suspend the handling of interrupt signals | |
| 76 | * over a period of time. This is similar to SIGHOLD to or sigblock, but | |
| 77 | * much more efficient and portable. (But hacking the kernel is so much | |
| 78 | * more fun than worrying about efficiency and portability. :-)) | |
| 79 | */ | |
| 80 | ||
| 81 | extern volatile int suppressint; | |
| 82 | extern volatile int intpending; | |
| 83 | extern char *commandname; /* name of command--printed on error */ | |
| 84 | ||
| 85 | #define INTOFF suppressint++ | |
| 86 | #define INTON if (--suppressint == 0 && intpending) onint(); else | |
| 87 | #define FORCEINTON {suppressint = 0; if (intpending) onint();} | |
| 88 | #define CLEAR_PENDING_INT intpending = 0 | |
| 89 | #define int_pending() intpending | |
| 90 | ||
| 91 | #ifdef __STDC__ | |
| 92 | void exraise(int); | |
| 93 | void onint(void); | |
| 94 | void error2(char *, char *); | |
| 95 | void error(char *, ...); | |
| 96 | char *errmsg(int, int); | |
| 97 | #else | |
| 98 | void exraise(); | |
| 99 | void onint(); | |
| 100 | void error2(); | |
| 101 | void error(); | |
| 102 | char *errmsg(); | |
| 103 | #endif | |
| 104 | ||
| 105 | ||
| 106 | /* | |
| 107 | * BSD setjmp saves the signal mask, which violates ANSI C and takes time, | |
| 108 | * so we use _setjmp instead. | |
| 109 | */ | |
| 110 | ||
| 111 | #ifdef BSD | |
| 112 | #define setjmp(jmploc) _setjmp(jmploc) | |
| 113 | #define longjmp(jmploc, val) _longjmp(jmploc, val) | |
| 114 | #endif |