1 /* $NetBSD: fsi_lex.l,v 1.5 2015/01/17 17:46:31 christos Exp $ */ 2 3 %{ 4 /* 5 * Copyright (c) 1997-2014 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. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * 39 * File: am-utils/fsinfo/fsi_lex.l 40 * 41 */ 42 43 /* 44 * Lexical analyzer for fsinfo. 45 * TODO: Needs rewriting. 46 */ 47 48 static int ayylineno; 49 50 #ifdef FLEX_SCANNER 51 # define INIT_STATE { \ 52 switch ((yy_start - 1) / 2) { \ 53 case 0: \ 54 BEGIN F; \ 55 break; \ 56 } \ 57 } 58 59 #else /* not FLEX_SCANNER */ 60 61 /* 62 * Using old lex... 63 */ 64 # define INIT_STATE { \ 65 switch (yybgin - yysvec - 1) { \ 66 case 0: \ 67 BEGIN F; \ 68 break; \ 69 } \ 70 } 71 72 #endif /* end FLEX_SCANNER */ 73 74 #ifdef HAVE_CONFIG_H 75 # include <config.h> 76 #endif /* HAVE_CONFIG_H */ 77 /* 78 * Some systems include a definition for the macro ECHO in <sys/ioctl.h>, 79 * and their (bad) version of lex defines it too at the very beginning of 80 * the generated lex.yy.c file (before it can be easily undefined), 81 * resulting in a conflict. So undefine it here before needed. 82 * Luckily, it does not appear that this macro is actually used in the rest 83 * of the generated lex.yy.c file. 84 */ 85 #ifdef ECHO 86 # undef ECHO 87 #endif /* ECHO */ 88 #include <am_defs.h> 89 #include <fsi_data.h> 90 #include <fsinfo.h> 91 #include <fsi_gram.h> 92 /* and once again undefine this, just in case */ 93 #ifdef ECHO 94 # undef ECHO 95 #endif /* ECHO */ 96 97 /* 98 * There are some things that need to be defined only if using GNU flex. 99 * These must not be defined if using standard lex 100 */ 101 #ifdef FLEX_SCANNER 102 # ifndef ECHO 103 # define ECHO __IGNORE(fwrite( yytext, yyleng, 1, yyout )) 104 # endif /* not ECHO */ 105 #endif /* FLEX_SCANNER */ 106 107 /* 108 * some systems such as DU-4.x have a different GNU flex in /usr/bin 109 * which automatically generates yywrap macros and symbols. So I must 110 * distinguish between them and when yywrap is actually needed. 111 */ 112 #if !defined(yywrap) || defined(yylex) 113 int yywrap(void); 114 #endif /* not yywrap or yylex */ 115 116 int fsi_error(const char *, ...); 117 118 YYSTYPE yylval; 119 static char *fsi_filename; 120 static char *optr; 121 static char ostr[1024]; 122 static int find_resword(char *); 123 static int quoted; 124 125 struct r { 126 char *rw; 127 int tok; 128 } rr[] = { 129 { "->", tEQ }, 130 { "arch", tARCH }, 131 { "as", tAS }, 132 { "automount", tAUTOMOUNT }, 133 { "cluster", tCLUSTER }, 134 { "config", tCONFIG }, 135 { "direct", tDIRECT }, 136 { "dumpset", tDUMPSET }, 137 { "exportfs", tEXPORTFS }, 138 { "freq", tFREQ }, 139 { "from", tFROM }, 140 { "fs", tFS }, 141 { "fstype", tFSTYPE }, 142 { "host", tHOST }, 143 { "hwaddr", tHWADDR }, 144 { "inaddr", tINADDR }, 145 { "localhost", tLOCALHOST }, 146 { "log", tLOG }, 147 { "mount", tMOUNT }, 148 { "netif", tNETIF }, 149 { "netmask", tNETMASK }, 150 { "nfsalias", tNFSEQ }, 151 { "opts", tOPTS }, 152 { "os", tOS }, 153 { "passno", tPASSNO }, 154 { "sel", tSEL }, 155 { "volname", tVOLNAME }, 156 { NULL, 0 }, 157 }; 158 #define NRES_WORDS (sizeof(rr)/sizeof(rr[0])-1) 159 160 %} 161 162 /* This option causes Solaris lex to fail. Use flex. See BUGS file */ 163 /* no need to use yyunput() */ 164 %option nounput 165 %option noinput 166 167 /* allocate more output slots so lex scanners don't run out of mem */ 168 %o 1024 169 170 %start F Q 171 172 %% 173 INIT_STATE; /* witchcraft */ 174 175 <F>[^ \t\n"={}]+ { return find_resword(yytext); } /* dummy " */ 176 <F>[ \t] ; 177 <F>"\n" { ayylineno++; } 178 <F>[={}] { return *yytext; } 179 180 <F>\" { BEGIN Q; optr = ostr; quoted = 1; } 181 <Q>\n { ayylineno++; fsi_error("\" expected"); BEGIN F; } 182 <Q>\\b { *optr++ = '\b'; /* escape */ } 183 <Q>\\t { *optr++ = '\t'; /* escape */ } 184 <Q>\\\" { *optr++ = '\"'; /* escape */ } 185 <Q>\\\\ { *optr++ = '\\'; /* escape */ } 186 <Q>\\\n { ayylineno++; /* continue */ } 187 <Q>\\r { *optr++ = '\r'; /* escape */ } 188 <Q>\\n { *optr++ = '\n'; /* escape */ } 189 <Q>\\f { *optr++ = '\f'; /* escape */ } 190 <Q>"\\ " { *optr++ = ' '; /* force space */ } 191 <Q>\\. { fsi_error("Unknown \\ sequence"); } 192 <Q>([ \t]|"\\\n"){2,} { char *p = (char *) yytext-1; while ((p = strchr(p+1, '\n'))) ayylineno++; } 193 <Q>\" { BEGIN F; quoted = 0; 194 *optr = '\0'; 195 yylval.s = xstrdup(ostr); 196 return tSTR; 197 } 198 <Q>. { *optr++ = *yytext; } 199 200 %% 201 202 203 static int 204 find_resword(char *s) 205 { 206 int tok = 0; 207 int l = 0, m = NRES_WORDS/2, h = NRES_WORDS-1; 208 int rc = 0; 209 210 m = NRES_WORDS/2; 211 212 #define FSTRCMP(p, q) ((*(p) == *(q)) ? strcmp((p)+1, (q)+1) : *(p) - *(q)) 213 214 while ((l <= h) && (rc = FSTRCMP(s, rr[m].rw))) { 215 if (rc < 0) 216 h = m - 1; 217 else 218 l = m + 1; 219 m = (h + l) / 2; 220 } 221 222 if (rc == 0) 223 tok = rr[m].tok; 224 225 switch (tok) { 226 case tLOCALHOST: 227 s = "${host}"; 228 /*FALLTHROUGH*/ 229 case 0: 230 yylval.s = xstrdup(s); 231 tok = tSTR; 232 /*FALLTHROUGH*/ 233 default: 234 return tok; 235 } 236 } 237 238 239 int 240 fsi_error(const char *fmt, ...) 241 { 242 va_list ap; 243 244 va_start(ap, fmt); 245 col_cleanup(0); 246 fprintf(stderr, "%s:%d: ", fsi_filename ? fsi_filename : "/dev/stdin", ayylineno); 247 vfprintf(stderr, fmt, ap); 248 fputc('\n', stderr); 249 parse_errors++; 250 va_end(ap); 251 return 0; 252 } 253 254 255 ioloc * 256 current_location(void) 257 { 258 ioloc *ip = CALLOC(struct ioloc); 259 ip->i_line = ayylineno; 260 ip->i_file = fsi_filename; 261 return ip; 262 } 263 264 265 /* 266 * some systems such as DU-4.x have a different GNU flex in /usr/bin 267 * which automatically generates yywrap macros and symbols. So I must 268 * distinguish between them and when yywrap is actually needed. 269 */ 270 #if !defined(yywrap) || defined(yylex) 271 int yywrap(void) 272 { 273 return 1; 274 } 275 #endif /* not yywrap or yylex */ 276