%{ /* * Copyright (c) 1985 * The Regents of the University of California. All rights reserved. * * 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. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. 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. */ /* * Portions Copyright (c) 1993 by Digital Equipment Corporation. * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies, and that * the name of Digital Equipment Corporation not be used in advertising or * publicity pertaining to distribution of the document or software without * specific, written prior permission. * * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS * SOFTWARE. */ #ifndef lint static char sccsid[] = "@(#)commands.l 5.13 (Berkeley) 7/24/90"; #endif /* not lint */ /* ******************************************************************************* * * commands.l * * Andrew Cherenson CS298-26 Fall 1985 * * Lex input file for the nslookup program command interpreter. * When a sequence is recognized, the associated action * routine is called. The action routine may need to * parse the string for additional information. * * Recognized commands: (identifiers are shown in uppercase) * * server NAME - set default server to NAME, using default server * lserver NAME - set default server to NAME, using initial server * finger [NAME] - finger the optional NAME * exit - exit the program * root - set default server to the root * ls NAME - list the domain NAME * view FILE - sorts and view the file with more * set OPTION - set an option * help - print help information * ? - print help information * NAME - print info about the host/domain NAME * using default server. * NAME1 NAME2 - as above, but use NAME2 as server * * * yylex Results: * 0 upon end-of-file. * 1 after each command. * ******************************************************************************* */ #include "port_before.h" #include #include #include "port_after.h" #include "res.h" extern char rootServerName[]; extern void PrintHelp(); #define YY_INPUT(buf, result, max_size) \ { \ nslookup_yy_input((char *)buf, &result, \ max_size, yy_current_buffer->yy_is_interactive); \ } const char * nslookup_prompt() { return ("> "); } int nslookup_yy_input(buf, result, max_size, intr) char * buf; int * result; int max_size; int intr; { static EditLine *el = NULL; static History *hist = NULL; int num = 0; const char *bp = NULL; if (intr) { if (!el) { el = el_init("nslookup", yyin, yyout); hist = history_init(); history(hist, H_EVENT, 100); el_set(el, EL_HIST, history, hist); el_set(el, EL_EDITOR, "emacs"); el_set(el, EL_PROMPT, nslookup_prompt); el_set(el, EL_SIGNAL, 1); } if ((bp = el_gets(el, &num)) == NULL || num == 0) { *result = 0; return; } *result = (num > max_size) ? max_size : num; strncpy(buf, bp, *result); history(hist, H_ENTER, bp); } else { if ( ((*result = fread( buf, 1, max_size, yyin )) == 0) && ferror( yyin ) ) yy_fatal_error( "input in flex scanner failed" ); } return; } %} WS [ \t] FLET [A-Za-z0-9.*\\] LET [A-Za-z0-9.*] NAME [A-Za-z0-9.*=_/-] %% ^{WS}*server{WS}+{LET}{NAME}*{WS}*$ { /* * 0 == use current server to find * the new one. * 1 == use original server to find * the new one. */ SetDefaultServer(yytext, 0); return(1); } ^{WS}*lserver{WS}+{LET}{NAME}*{WS}*$ { SetDefaultServer(yytext, 1); return(1); } ^{WS}*exit{WS}*$ { return(0); } ^{WS}*root{WS}*$ { SetDefaultServer(rootServerName, 1); return(1); } ^{WS}*finger({WS}+{LET}{NAME}*)?{WS}+>>?{WS}*{NAME}+{WS}*$ { /* * 2nd arg. * 0 == output to stdout * 1 == output to file */ Finger(yytext, 1); return(1); } ^{WS}*finger({WS}+{LET}{NAME}*)?{WS}*$ { Finger(yytext, 0); return(1); } ^{WS}*view{WS}+{NAME}+{WS}*$ { ViewList(yytext); return(1); } ^{WS}*ls{WS}+(("-a"|"-d"|"-h"|"-m"|"-s"){WS}+)?{LET}{NAME}*{WS}+>>?{WS}+{NAME}+{WS}*$ { /* * 2nd arg. * 0 == output to stdout * 1 == output to file */ ListHosts(yytext, 1); return(1); } ^{WS}*ls{WS}+(("-a"|"-d"|"-h"|"-m"|"-s"){WS}+)?{LET}{NAME}*{WS}*$ { ListHosts(yytext, 0); return(1); } ^{WS}*ls{WS}+-t{WS}+({LET}{NAME}*{WS}+)?{LET}{NAME}*{WS}+>>?{WS}+{NAME}+{WS}*$ { /* * 2nd arg. * 0 == output to stdout * 1 == output to file */ ListHostsByType(yytext, 1); return(1); } ^{WS}*ls{WS}+-t{WS}+({LET}{NAME}*{WS}+)?{LET}{NAME}*{WS}*$ { ListHostsByType(yytext, 0); return(1); } ^{WS}*set{WS}+{NAME}+{WS}*$ { SetOption(yytext); return(1); } ^{WS}*help{WS}*$ { PrintHelp(); return(1); } ^{WS}*"?"{WS}*$ { extern void PrintHelp(); PrintHelp(); return(1); } ^{WS}*{FLET}{NAME}*{WS}+>>?{WS}*{NAME}+{WS}*$ { /* * 0 == output to stdout * 1 == output to file */ LookupHost(yytext, 1); return(1); } ^{WS}*{FLET}{NAME}*{WS}*$ { LookupHost(yytext, 0); return(1); } ^{WS}*{FLET}{NAME}*{WS}+{LET}{NAME}*{WS}+>>?{WS}*{NAME}+{WS}*$ { /* * 0 == output to stdout * 1 == output to file */ LookupHostWithServer(yytext, 1); return(1); } ^{WS}*{FLET}{NAME}*{WS}+{LET}{NAME}*{WS}*$ { LookupHostWithServer(yytext, 0); return(1); } ^{WS}*\n { return(1); } ^.*\n { printf("Unrecognized command: %s", yytext); return(1); } \n { ; } %%