fsi_lex.l revision 1.1
1/* $NetBSD: fsi_lex.l,v 1.1 2008/09/19 20:07:21 christos Exp $ */ 2 3%{ 4/* 5 * Copyright (c) 1997-2007 Erez Zadok 6 * Copyright (c) 1989 Jan-Simon Pendry 7 * Copyright (c) 1989 Imperial College of Science, Technology & Medicine 8 * Copyright (c) 1989 The Regents of the University of California. 9 * All rights reserved. 10 * 11 * This code is derived from software contributed to Berkeley by 12 * Jan-Simon Pendry at Imperial College, London. 13 * 14 * Redistribution and use in source and binary forms, with or without 15 * modification, are permitted provided that the following conditions 16 * are met: 17 * 1. Redistributions of source code must retain the above copyright 18 * notice, this list of conditions and the following disclaimer. 19 * 2. Redistributions in binary form must reproduce the above copyright 20 * notice, this list of conditions and the following disclaimer in the 21 * documentation and/or other materials provided with the distribution. 22 * 3. All advertising materials mentioning features or use of this software 23 * must display the following acknowledgment: 24 * This product includes software developed by the University of 25 * California, Berkeley and its contributors. 26 * 4. Neither the name of the University nor the names of its contributors 27 * may be used to endorse or promote products derived from this software 28 * without specific prior written permission. 29 * 30 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 31 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 32 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 33 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 34 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 35 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 36 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 37 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 38 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 39 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 40 * SUCH DAMAGE. 41 * 42 * 43 * File: am-utils/fsinfo/fsi_lex.l 44 * 45 */ 46 47/* 48 * Lexical analyzer for fsinfo. 49 * TODO: Needs rewriting. 50 */ 51 52static int ayylineno; 53 54#ifdef FLEX_SCANNER 55# define INIT_STATE { \ 56 switch ((yy_start - 1) / 2) { \ 57 case 0: \ 58 BEGIN F; \ 59 break; \ 60 } \ 61} 62 63#else /* not FLEX_SCANNER */ 64 65/* 66 * Using old lex... 67 */ 68# define INIT_STATE { \ 69 switch (yybgin - yysvec - 1) { \ 70 case 0: \ 71 BEGIN F; \ 72 break; \ 73 } \ 74} 75 76#endif /* end FLEX_SCANNER */ 77 78#ifdef HAVE_CONFIG_H 79# include <config.h> 80#endif /* HAVE_CONFIG_H */ 81/* 82 * Some systems include a definition for the macro ECHO in <sys/ioctl.h>, 83 * and their (bad) version of lex defines it too at the very beginning of 84 * the generated lex.yy.c file (before it can be easily undefined), 85 * resulting in a conflict. So undefine it here before needed. 86 * Luckily, it does not appear that this macro is actually used in the rest 87 * of the generated lex.yy.c file. 88 */ 89#ifdef ECHO 90# undef ECHO 91#endif /* ECHO */ 92#include <am_defs.h> 93#include <fsi_data.h> 94#include <fsinfo.h> 95#include <fsi_gram.h> 96/* and once again undefine this, just in case */ 97#ifdef ECHO 98# undef ECHO 99#endif /* ECHO */ 100 101/* 102 * There are some things that need to be defined only if using GNU flex. 103 * These must not be defined if using standard lex 104 */ 105#ifdef FLEX_SCANNER 106# ifndef ECHO 107# define ECHO (void) fwrite( yytext, yyleng, 1, yyout ) 108# endif /* not ECHO */ 109#endif /* FLEX_SCANNER */ 110 111/* 112 * some systems such as DU-4.x have a different GNU flex in /usr/bin 113 * which automatically generates yywrap macros and symbols. So I must 114 * distinguish between them and when yywrap is actually needed. 115 */ 116#ifndef yywrap 117int yywrap(void); 118#endif /* not yywrap */ 119 120int yyerror(const char *, ...); 121 122YYSTYPE yylval; 123static char *fsi_filename; 124static char *optr; 125static char ostr[1024]; 126static int find_resword(char *); 127static int quoted; 128 129struct r { 130 char *rw; 131 int tok; 132} rr[] = { 133 { "->", tEQ }, 134 { "arch", tARCH }, 135 { "as", tAS }, 136 { "automount", tAUTOMOUNT }, 137 { "cluster", tCLUSTER }, 138 { "config", tCONFIG }, 139 { "direct", tDIRECT }, 140 { "dumpset", tDUMPSET }, 141 { "exportfs", tEXPORTFS }, 142 { "freq", tFREQ }, 143 { "from", tFROM }, 144 { "fs", tFS }, 145 { "fstype", tFSTYPE }, 146 { "host", tHOST }, 147 { "hwaddr", tHWADDR }, 148 { "inaddr", tINADDR }, 149 { "localhost", tLOCALHOST }, 150 { "log", tLOG }, 151 { "mount", tMOUNT }, 152 { "netif", tNETIF }, 153 { "netmask", tNETMASK }, 154 { "nfsalias", tNFSEQ }, 155 { "opts", tOPTS }, 156 { "os", tOS }, 157 { "passno", tPASSNO }, 158 { "sel", tSEL }, 159 { "volname", tVOLNAME }, 160 { NULL, 0 }, 161}; 162#define NRES_WORDS (sizeof(rr)/sizeof(rr[0])-1) 163 164%} 165 166/* This option causes Solaris lex to fail. Use flex. See BUGS file */ 167/* no need to use yyunput() */ 168%option nounput 169 170/* allocate more output slots so lex scanners don't run out of mem */ 171%o 1024 172 173%start F Q 174 175%% 176 INIT_STATE; /* witchcraft */ 177 178<F>[^ \t\n"={}]+ { return find_resword(yytext); } /* dummy " */ 179<F>[ \t] ; 180<F>"\n" { ayylineno++; } 181<F>[={}] { return *yytext; } 182 183<F>\" { BEGIN Q; optr = ostr; quoted = 1; } 184<Q>\n { ayylineno++; yyerror("\" expected"); BEGIN F; } 185<Q>\\b { *optr++ = '\b'; /* escape */ } 186<Q>\\t { *optr++ = '\t'; /* escape */ } 187<Q>\\\" { *optr++ = '\"'; /* escape */ } 188<Q>\\\\ { *optr++ = '\\'; /* escape */ } 189<Q>\\\n { ayylineno++; /* continue */ } 190<Q>\\r { *optr++ = '\r'; /* escape */ } 191<Q>\\n { *optr++ = '\n'; /* escape */ } 192<Q>\\f { *optr++ = '\f'; /* escape */ } 193<Q>"\\ " { *optr++ = ' '; /* force space */ } 194<Q>\\. { yyerror("Unknown \\ sequence"); } 195<Q>([ \t]|"\\\n"){2,} { char *p = (char *) yytext-1; while ((p = strchr(p+1, '\n'))) ayylineno++; } 196<Q>\" { BEGIN F; quoted = 0; 197 *optr = '\0'; 198 yylval.s = strdup(ostr); 199 return tSTR; 200 } 201<Q>. { *optr++ = *yytext; } 202 203%% 204 205 206static int 207find_resword(char *s) 208{ 209 int tok = 0; 210 int l = 0, m = NRES_WORDS/2, h = NRES_WORDS-1; 211 int rc = 0; 212 213 m = NRES_WORDS/2; 214 215#define FSTRCMP(p, q) ((*(p) == *(q)) ? strcmp((p)+1, (q)+1) : *(p) - *(q)) 216 217 while ((l <= h) && (rc = FSTRCMP(s, rr[m].rw))) { 218 if (rc < 0) 219 h = m - 1; 220 else 221 l = m + 1; 222 m = (h + l) / 2; 223 } 224 225 if (rc == 0) 226 tok = rr[m].tok; 227 228 switch (tok) { 229 case tLOCALHOST: 230 s = "${host}"; 231 /* fall through... */ 232 case 0: 233 yylval.s = strdup(s); 234 tok = tSTR; 235 /* fall through... */ 236 default: 237 return tok; 238 } 239} 240 241 242int 243yyerror(const char *fmt, ...) 244{ 245 va_list ap; 246 247 va_start(ap, fmt); 248 col_cleanup(0); 249 fprintf(stderr, "%s:%d: ", fsi_filename ? fsi_filename : "/dev/stdin", ayylineno); 250 vfprintf(stderr, fmt, ap); 251 fputc('\n', stderr); 252 parse_errors++; 253 va_end(ap); 254 return 0; 255} 256 257 258ioloc * 259current_location(void) 260{ 261 ioloc *ip = CALLOC(struct ioloc); 262 ip->i_line = ayylineno; 263 ip->i_file = fsi_filename; 264 return ip; 265} 266 267 268/* 269 * some systems such as DU-4.x have a different GNU flex in /usr/bin 270 * which automatically generates yywrap macros and symbols. So I must 271 * distinguish between them and when yywrap is actually needed. 272 */ 273#ifndef yywrap 274int yywrap(void) 275{ 276 return 1; 277} 278#endif /* not yywrap */ 279