* Copyright (c) 1991 The Regents of the University of California.
* This code is derived from software contributed to Berkeley by
* %sccs.include.redist.c%
* @(#)error.h 5.1 (Berkeley) %G%
* 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.
extern struct jmploc
*handler
;
#define EXINT 0 /* SIGINT received */
#define EXERROR 1 /* a generic error */
#define EXSHELLPROC 2 /* execute a shell procedure */
* 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 volatile int suppressint
;
extern volatile int intpending
;
extern char *commandname
; /* name of command--printed on error */
#define INTOFF suppressint++
#define INTON if (--suppressint == 0 && intpending) onint(); else
#define FORCEINTON {suppressint = 0; if (intpending) onint();}
#define CLEAR_PENDING_INT intpending = 0
#define int_pending() intpending
void error2(char *, char *);
* BSD setjmp saves the signal mask, which violates ANSI C and takes time,
* so we use _setjmp instead.
#define setjmp(jmploc) _setjmp(jmploc)
#define longjmp(jmploc, val) _longjmp(jmploc, val)