14b88c807SRodney W. Grimes /*- 24b88c807SRodney W. Grimes * Copyright (c) 1991, 1993 34b88c807SRodney W. Grimes * The Regents of the University of California. All rights reserved. 44b88c807SRodney W. Grimes * 54b88c807SRodney W. Grimes * This code is derived from software contributed to Berkeley by 64b88c807SRodney W. Grimes * Kenneth Almquist. 74b88c807SRodney W. Grimes * 84b88c807SRodney W. Grimes * Redistribution and use in source and binary forms, with or without 94b88c807SRodney W. Grimes * modification, are permitted provided that the following conditions 104b88c807SRodney W. Grimes * are met: 114b88c807SRodney W. Grimes * 1. Redistributions of source code must retain the above copyright 124b88c807SRodney W. Grimes * notice, this list of conditions and the following disclaimer. 134b88c807SRodney W. Grimes * 2. Redistributions in binary form must reproduce the above copyright 144b88c807SRodney W. Grimes * notice, this list of conditions and the following disclaimer in the 154b88c807SRodney W. Grimes * documentation and/or other materials provided with the distribution. 164b88c807SRodney W. Grimes * 4. Neither the name of the University nor the names of its contributors 174b88c807SRodney W. Grimes * may be used to endorse or promote products derived from this software 184b88c807SRodney W. Grimes * without specific prior written permission. 194b88c807SRodney W. Grimes * 204b88c807SRodney W. Grimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 214b88c807SRodney W. Grimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 224b88c807SRodney W. Grimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 234b88c807SRodney W. Grimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 244b88c807SRodney W. Grimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 254b88c807SRodney W. Grimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 264b88c807SRodney W. Grimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 274b88c807SRodney W. Grimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 284b88c807SRodney W. Grimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 294b88c807SRodney W. Grimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 304b88c807SRodney W. Grimes * SUCH DAMAGE. 314b88c807SRodney W. Grimes * 32aa9caaf6SPeter Wemm * @(#)error.h 8.2 (Berkeley) 5/4/95 332a456239SPeter Wemm * $FreeBSD$ 344b88c807SRodney W. Grimes */ 354b88c807SRodney W. Grimes 364b88c807SRodney W. Grimes /* 374b88c807SRodney W. Grimes * We enclose jmp_buf in a structure so that we can declare pointers to 384b88c807SRodney W. Grimes * jump locations. The global variable handler contains the location to 394b88c807SRodney W. Grimes * jump to when an exception occurs, and the global variable exception 4046be34b9SKris Kennaway * contains a code identifying the exception. To implement nested 414b88c807SRodney W. Grimes * exception handlers, the user should save the value of handler on entry 424b88c807SRodney W. Grimes * to an inner scope, set handler to point to a jmploc structure for the 434b88c807SRodney W. Grimes * inner scope, and restore handler on exit from the scope. 444b88c807SRodney W. Grimes */ 454b88c807SRodney W. Grimes 464b88c807SRodney W. Grimes #include <setjmp.h> 477a8e920bSMartin Cracauer #include <signal.h> 484b88c807SRodney W. Grimes 494b88c807SRodney W. Grimes struct jmploc { 504b88c807SRodney W. Grimes jmp_buf loc; 514b88c807SRodney W. Grimes }; 524b88c807SRodney W. Grimes 534b88c807SRodney W. Grimes extern struct jmploc *handler; 54a1c7435aSMartin Cracauer extern volatile sig_atomic_t exception; 554b88c807SRodney W. Grimes 564b88c807SRodney W. Grimes /* exceptions */ 574b88c807SRodney W. Grimes #define EXINT 0 /* SIGINT received */ 584b88c807SRodney W. Grimes #define EXERROR 1 /* a generic error */ 593835f47cSJilles Tjoelker #define EXEXEC 2 /* command execution failed */ 6045496405SJilles Tjoelker #define EXEXIT 3 /* call exitshell(exitstatus) */ 614b88c807SRodney W. Grimes 624b88c807SRodney W. Grimes 634b88c807SRodney W. Grimes /* 644b88c807SRodney W. Grimes * These macros allow the user to suspend the handling of interrupt signals 654b88c807SRodney W. Grimes * over a period of time. This is similar to SIGHOLD to or sigblock, but 664b88c807SRodney W. Grimes * much more efficient and portable. (But hacking the kernel is so much 674b88c807SRodney W. Grimes * more fun than worrying about efficiency and portability. :-)) 684b88c807SRodney W. Grimes */ 694b88c807SRodney W. Grimes 707a8e920bSMartin Cracauer extern volatile sig_atomic_t suppressint; 717a8e920bSMartin Cracauer extern volatile sig_atomic_t intpending; 724b88c807SRodney W. Grimes 734b88c807SRodney W. Grimes #define INTOFF suppressint++ 74aa9caaf6SPeter Wemm #define INTON { if (--suppressint == 0 && intpending) onint(); } 759922c6d2SJilles Tjoelker #define is_int_on() suppressint 769922c6d2SJilles Tjoelker #define SETINTON(s) suppressint = (s) 774b88c807SRodney W. Grimes #define FORCEINTON {suppressint = 0; if (intpending) onint();} 7885052e7bSJilles Tjoelker #define SET_PENDING_INT intpending = 1 794b88c807SRodney W. Grimes #define CLEAR_PENDING_INT intpending = 0 804b88c807SRodney W. Grimes #define int_pending() intpending 814b88c807SRodney W. Grimes 8295139d9dSJilles Tjoelker void exraise(int) __dead2; 8385052e7bSJilles Tjoelker void onint(void) __dead2; 845fe9123fSJilles Tjoelker void warning(const char *, ...) __printflike(1, 2); 8595139d9dSJilles Tjoelker void error(const char *, ...) __printf0like(1, 2) __dead2; 8695139d9dSJilles Tjoelker void exerror(int, const char *, ...) __printf0like(2, 3) __dead2; 874b88c807SRodney W. Grimes 884b88c807SRodney W. Grimes 894b88c807SRodney W. Grimes /* 904b88c807SRodney W. Grimes * BSD setjmp saves the signal mask, which violates ANSI C and takes time, 914b88c807SRodney W. Grimes * so we use _setjmp instead. 924b88c807SRodney W. Grimes */ 934b88c807SRodney W. Grimes 944b88c807SRodney W. Grimes #define setjmp(jmploc) _setjmp(jmploc) 954b88c807SRodney W. Grimes #define longjmp(jmploc, val) _longjmp(jmploc, val) 96