276 lines
8.0 KiB
Plaintext
276 lines
8.0 KiB
Plaintext
%{
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/* $FreeBSD$ */
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/*
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* Copyright (c) 1985
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* Portions Copyright (c) 1993 by Digital Equipment Corporation.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies, and that
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* the name of Digital Equipment Corporation not be used in advertising or
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* publicity pertaining to distribution of the document or software without
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* specific, written prior permission.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
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* WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT
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* CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
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* DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
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* PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
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* ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
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* SOFTWARE.
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*/
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#ifndef lint
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static char sccsid[] = "@(#)commands.l 5.13 (Berkeley) 7/24/90";
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#endif /* not lint */
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/*
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*******************************************************************************
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*
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* commands.l
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*
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* Andrew Cherenson CS298-26 Fall 1985
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*
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* Lex input file for the nslookup program command interpreter.
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* When a sequence is recognized, the associated action
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* routine is called. The action routine may need to
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* parse the string for additional information.
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*
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* Recognized commands: (identifiers are shown in uppercase)
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*
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* server NAME - set default server to NAME, using default server
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* lserver NAME - set default server to NAME, using initial server
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* finger [NAME] - finger the optional NAME
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* exit - exit the program
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* root - set default server to the root
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* ls NAME - list the domain NAME
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* view FILE - sorts and view the file with more
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* set OPTION - set an option
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* help - print help information
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* ? - print help information
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* NAME - print info about the host/domain NAME
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* using default server.
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* NAME1 NAME2 - as above, but use NAME2 as server
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*
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*
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* yylex Results:
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* 0 upon end-of-file.
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* 1 after each command.
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*
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*******************************************************************************
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*/
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#include "port_before.h"
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#include <sys/types.h>
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#include <netinet/in.h>
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#include <histedit.h>
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#include "port_after.h"
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#include <resolv.h>
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#include "res.h"
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extern char rootServerName[];
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extern void PrintHelp();
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extern void ViewList(char *);
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#define YY_INPUT(buf, result, max_size) \
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{ \
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nslookup_yy_input((char *)buf, &result, \
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max_size, yy_current_buffer->yy_is_interactive); \
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}
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const char *
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nslookup_prompt()
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{
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return ("> ");
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}
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int
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nslookup_yy_input(buf, result, max_size, intr)
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char * buf;
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int * result;
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int max_size;
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int intr;
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{
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static EditLine *el = NULL;
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static History *hist = NULL;
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HistEvent he;
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int num = 0;
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const char *bp = NULL;
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if (intr) {
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if (!el) {
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el = el_init("nslookup", yyin, yyout, stderr);
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hist = history_init();
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history(hist, &he, H_EVENT, 100);
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el_set(el, EL_HIST, history, hist);
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el_set(el, EL_EDITOR, "emacs");
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el_set(el, EL_PROMPT, nslookup_prompt);
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el_set(el, EL_SIGNAL, 1);
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el_source(el, NULL);
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}
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if ((bp = el_gets(el, &num)) == NULL || num == 0) {
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*result = 0;
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return;
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}
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*result = (num > max_size) ? max_size : num;
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strncpy(buf, bp, *result);
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history(hist, &he, H_ENTER, bp);
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} else {
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if ( ((*result = fread( buf, 1, max_size, yyin )) == 0)
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&& ferror( yyin ) )
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yy_fatal_error( "input in flex scanner failed" );
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}
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return;
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}
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%}
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WS [ \t]
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FLET [:A-Za-z0-9.*\\_]
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LET [:A-Za-z0-9.*_]
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NAME [:A-Za-z0-9.*=_/-]
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%%
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^{WS}*server{WS}+{LET}{NAME}*{WS}*$ {
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/*
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* 0 == use current server to find
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* the new one.
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* 1 == use original server to find
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* the new one.
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*/
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SetDefaultServer(yytext, 0);
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return(1);
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}
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^{WS}*lserver{WS}+{LET}{NAME}*{WS}*$ {
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SetDefaultServer(yytext, 1);
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return(1);
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}
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^{WS}*exit{WS}*$ {
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return(0);
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}
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^{WS}*root{WS}*$ {
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SetDefaultServer(rootServerName, 1);
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return(1);
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}
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^{WS}*finger({WS}+{LET}{NAME}*)?{WS}+>>?{WS}*{NAME}+{WS}*$ {
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/*
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* 2nd arg.
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* 0 == output to stdout
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* 1 == output to file
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*/
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Finger(yytext, 1);
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return(1);
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}
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^{WS}*finger({WS}+{LET}{NAME}*)?{WS}*$ {
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Finger(yytext, 0);
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return(1);
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}
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^{WS}*ls{WS}+(("-a"|"-d"|"-h"|"-m"|"-s"){WS}+)?{LET}{NAME}*{WS}+>>?{WS}+{NAME}+{WS}*$ {
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/*
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* 2nd arg.
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* 0 == output to stdout
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* 1 == output to file
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*/
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ListHosts(yytext, 1);
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return(1);
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}
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^{WS}*ls{WS}+(("-a"|"-d"|"-h"|"-m"|"-s"){WS}+)?{LET}{NAME}*{WS}*$ {
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ListHosts(yytext, 0);
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return(1);
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}
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^{WS}*ls{WS}+-t{WS}+({LET}{NAME}*{WS}+)?{LET}{NAME}*{WS}+>>?{WS}+{NAME}+{WS}*$ {
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/*
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* 2nd arg.
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* 0 == output to stdout
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* 1 == output to file
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*/
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ListHostsByType(yytext, 1);
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return(1);
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}
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^{WS}*ls{WS}+-t{WS}+({LET}{NAME}*{WS}+)?{LET}{NAME}*{WS}*$ {
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ListHostsByType(yytext, 0);
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return(1);
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}
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^{WS}*set{WS}+{NAME}+{WS}*$ {
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SetOption(yytext);
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return(1);
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}
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^{WS}*help{WS}*$ {
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PrintHelp();
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return(1);
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}
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^{WS}*"?"{WS}*$ {
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extern void PrintHelp();
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PrintHelp();
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return(1);
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}
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^{WS}*{FLET}{NAME}*{WS}+>>?{WS}*{NAME}+{WS}*$ {
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/*
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* 0 == output to stdout
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* 1 == output to file
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*/
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LookupHost(yytext, 1);
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return(1);
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}
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^{WS}*{FLET}{NAME}*{WS}*$ {
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LookupHost(yytext, 0);
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return(1);
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}
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^{WS}*{FLET}{NAME}*{WS}+{LET}{NAME}*{WS}+>>?{WS}*{NAME}+{WS}*$ {
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/*
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* 0 == output to stdout
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* 1 == output to file
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*/
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LookupHostWithServer(yytext, 1);
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return(1);
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}
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^{WS}*{FLET}{NAME}*{WS}+{LET}{NAME}*{WS}*$ {
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LookupHostWithServer(yytext, 0);
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return(1);
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}
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^{WS}*\n {
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return(1);
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}
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^.*\n {
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printf("Unrecognized command: %s",
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yytext);
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return(1);
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}
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\n { ; }
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%%
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