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