freebsd-src/sys/ddb/db_lex.h
Robert Watson c9b0cc3b96 Add a simple scripting facility to DDB(4), allowing the user to
define a set of named scripts.  Each script consists of a list of DDB
commands separated by ";"s that will be executed verbatim.  No higher
level language constructs, such as branching, are provided for:
scripts are executed by sequentially injecting commands into the DDB
input buffer.

Four new commands are present in DDB: "run" to run a specific script,
"script" to define or print a script, "scripts" to list currently
defined scripts, and "unscript" to delete a script, modeled on shell
alias commands.  Scripts may also be manipulated using sysctls in the
debug.ddb.scripting MIB space, although users will prefer to use the
soon-to-be-added ddb(8) tool for usability reasons.

Scripts with certain names are automatically executed on various DDB
events, such as entering the debugger via a panic, a witness error,
watchdog, breakpoint, sysctl, serial break, etc, allowing customized
handling.

MFC after:	3 months
2007-12-26 09:33:19 +00:00

74 lines
1.8 KiB
C

/*-
* Mach Operating System
* Copyright (c) 1991,1990 Carnegie Mellon University
* All Rights Reserved.
*
* Permission to use, copy, modify and distribute this software and its
* documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie the
* rights to redistribute these changes.
*
* $FreeBSD$
*/
#ifndef _DDB_DB_LEX_H_
#define _DDB_DB_LEX_H_
/*
* Author: David B. Golub, Carnegie Mellon University
* Date: 7/90
*/
/*
* Lexical analyzer.
*/
void db_flush_lex(void);
char *db_get_line(void);
void db_inject_line(const char *command);
int db_read_line(void);
int db_read_token(void);
void db_unread_token(int t);
extern db_expr_t db_tok_number;
#define TOK_STRING_SIZE 120
extern char db_tok_string[TOK_STRING_SIZE];
#define tEOF (-1)
#define tEOL 1
#define tNUMBER 2
#define tIDENT 3
#define tPLUS 4
#define tMINUS 5
#define tDOT 6
#define tSTAR 7
#define tSLASH 8
#define tEQ 9
#define tLPAREN 10
#define tRPAREN 11
#define tPCT 12
#define tHASH 13
#define tCOMMA 14
#define tDITTO 15
#define tDOLLAR 16
#define tEXCL 17
#define tSHIFT_L 18
#define tSHIFT_R 19
#define tDOTDOT 20
#define tSEMI 21
#endif /* !_DDB_DB_LEX_H_ */