/*- * Copyright (c) 1991, 1993 * The Regents of the University of California. All rights reserved. * Copyright (c) 1997-2005 * Herbert Xu . All rights reserved. * * This code is derived from software contributed to Berkeley by * Kenneth Almquist. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)error.h 8.2 (Berkeley) 5/4/95 */ #include #include /* * Types of operations (passed to the errmsg routine). */ #define E_OPEN 01 /* opening a file */ #define E_CREAT 02 /* creating a file */ #define E_EXEC 04 /* executing a program */ /* * We enclose jmp_buf in a structure so that we can declare pointers to * jump locations. The global variable handler contains the location to * jump to when an exception occurs, and the global variable exception * contains a code identifying the exeception. To implement nested * exception handlers, the user should save the value of handler on entry * to an inner scope, set handler to point to a jmploc structure for the * inner scope, and restore handler on exit from the scope. */ struct jmploc { jmp_buf loc; }; extern struct jmploc *handler; extern int exception; /* exceptions */ #define EXINT 0 /* SIGINT received */ #define EXERROR 1 /* a generic error */ #define EXEND 3 /* exit the shell */ #define EXEXIT 4 /* exit the shell via exitcmd */ /* * These macros allow the user to suspend the handling of interrupt signals * over a period of time. This is similar to SIGHOLD to or sigblock, but * much more efficient and portable. (But hacking the kernel is so much * more fun than worrying about efficiency and portability. :-)) */ extern int suppressint; extern volatile sig_atomic_t intpending; #define barrier() ({ __asm__ __volatile__ ("": : :"memory"); }) #define INTOFF \ ({ \ suppressint++; \ barrier(); \ 0; \ }) #ifdef REALLY_SMALL void __inton(void); #define INTON __inton() #else #define INTON \ ({ \ barrier(); \ if (--suppressint == 0 && intpending) onint(); \ 0; \ }) #endif #define FORCEINTON \ ({ \ barrier(); \ suppressint = 0; \ if (intpending) onint(); \ 0; \ }) #define SAVEINT(v) ((v) = suppressint) #define RESTOREINT(v) \ ({ \ barrier(); \ if ((suppressint = (v)) == 0 && intpending) onint(); \ 0; \ }) #define CLEAR_PENDING_INT intpending = 0 #define int_pending() intpending void exraise(int) __attribute__((__noreturn__)); #ifdef USE_NORETURN void onint(void) __attribute__((__noreturn__)); #else void onint(void); #endif extern int errlinno; void sh_error(const char *, ...) __attribute__((__noreturn__)); void exerror(int, const char *, ...) __attribute__((__noreturn__)); const char *errmsg(int, int); void sh_warnx(const char *, ...);