1 %{ 2 /* 3 * Copyright (c) 1997-2006 Erez Zadok 4 * Copyright (c) 1989 Jan-Simon Pendry 5 * Copyright (c) 1989 Imperial College of Science, Technology & Medicine 6 * Copyright (c) 1989 The Regents of the University of California. 7 * All rights reserved. 8 * 9 * This code is derived from software contributed to Berkeley by 10 * Jan-Simon Pendry at Imperial College, London. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. All advertising materials mentioning features or use of this software 21 * must display the following acknowledgment: 22 * This product includes software developed by the University of 23 * California, Berkeley and its contributors. 24 * 4. Neither the name of the University nor the names of its contributors 25 * may be used to endorse or promote products derived from this software 26 * without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 * SUCH DAMAGE. 39 * 40 * 41 * File: am-utils/fsinfo/fsi_lex.l 42 * 43 */ 44 45 /* 46 * Lexical analyzer for fsinfo. 47 * TODO: Needs rewriting. 48 */ 49 50 static int ayylineno; 51 52 #ifdef FLEX_SCANNER 53 # define INIT_STATE { \ 54 switch ((yy_start - 1) / 2) { \ 55 case 0: \ 56 BEGIN F; \ 57 break; \ 58 } \ 59 } 60 61 #else /* not FLEX_SCANNER */ 62 63 /* 64 * Using old lex... 65 */ 66 # define INIT_STATE { \ 67 switch (yybgin - yysvec - 1) { \ 68 case 0: \ 69 BEGIN F; \ 70 break; \ 71 } \ 72 } 73 74 #endif /* end FLEX_SCANNER */ 75 76 #ifdef HAVE_CONFIG_H 77 # include <config.h> 78 #endif /* HAVE_CONFIG_H */ 79 /* 80 * Some systems include a definition for the macro ECHO in <sys/ioctl.h>, 81 * and their (bad) version of lex defines it too at the very beginning of 82 * the generated lex.yy.c file (before it can be easily undefined), 83 * resulting in a conflict. So undefine it here before needed. 84 * Luckily, it does not appear that this macro is actually used in the rest 85 * of the generated lex.yy.c file. 86 */ 87 #ifdef ECHO 88 # undef ECHO 89 #endif /* ECHO */ 90 #include <am_defs.h> 91 #include <fsi_data.h> 92 #include <fsinfo.h> 93 #include <fsi_gram.h> 94 /* and once again undefine this, just in case */ 95 #ifdef ECHO 96 # undef ECHO 97 #endif /* ECHO */ 98 99 /* 100 * There are some things that need to be defined only if using GNU flex. 101 * These must not be defined if using standard lex 102 */ 103 #ifdef FLEX_SCANNER 104 # ifndef ECHO 105 # define ECHO (void) fwrite( yytext, yyleng, 1, yyout ) 106 # endif /* not ECHO */ 107 #endif /* FLEX_SCANNER */ 108 109 /* 110 * some systems such as DU-4.x have a different GNU flex in /usr/bin 111 * which automatically generates yywrap macros and symbols. So I must 112 * distinguish between them and when yywrap is actually needed. 113 */ 114 #ifndef yywrap 115 int yywrap(void); 116 #endif /* not yywrap */ 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 { 0, 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 165 166 /* allocate more output slots so lex scanners don't run out of mem */ 167 %o 1024 168 169 %start F Q 170 171 %% 172 INIT_STATE; /* witchcraft */ 173 174 <F>[^ \t\n"={}]+ { return find_resword(yytext); } /* dummy " */ 175 <F>[ \t] ; 176 <F>"\n" { ayylineno++; } 177 <F>[={}] { return *yytext; } 178 179 <F>\" { BEGIN Q; optr = ostr; quoted = 1; } 180 <Q>\n { ayylineno++; yyerror("\" expected"); BEGIN F; } 181 <Q>\\b { *optr++ = '\b'; /* escape */ } 182 <Q>\\t { *optr++ = '\t'; /* escape */ } 183 <Q>\\\" { *optr++ = '\"'; /* escape */ } 184 <Q>\\\\ { *optr++ = '\\'; /* escape */ } 185 <Q>\\\n { ayylineno++; /* continue */ } 186 <Q>\\r { *optr++ = '\r'; /* escape */ } 187 <Q>\\n { *optr++ = '\n'; /* escape */ } 188 <Q>\\f { *optr++ = '\f'; /* escape */ } 189 <Q>"\\ " { *optr++ = ' '; /* force space */ } 190 <Q>\\. { yyerror("Unknown \\ sequence"); } 191 <Q>([ \t]|"\\\n"){2,} { char *p = (char *) yytext-1; while ((p = strchr(p+1, '\n'))) ayylineno++; } 192 <Q>\" { BEGIN F; quoted = 0; 193 *optr = '\0'; 194 yylval.s = strdup(ostr); 195 return tSTR; 196 } 197 <Q>. { *optr++ = *yytext; } 198 199 %% 200 201 202 static int 203 find_resword(char *s) 204 { 205 int tok = 0; 206 int l = 0, m = NRES_WORDS/2, h = NRES_WORDS-1; 207 int rc = 0; 208 209 m = NRES_WORDS/2; 210 211 #define FSTRCMP(p, q) ((*(p) == *(q)) ? strcmp((p)+1, (q)+1) : *(p) - *(q)) 212 213 while ((l <= h) && (rc = FSTRCMP(s, rr[m].rw))) { 214 if (rc < 0) 215 h = m - 1; 216 else 217 l = m + 1; 218 m = (h + l) / 2; 219 } 220 221 if (rc == 0) 222 tok = rr[m].tok; 223 224 switch (tok) { 225 case tLOCALHOST: 226 s = "${host}"; 227 /* fall through... */ 228 case 0: 229 yylval.s = strdup(s); 230 tok = tSTR; 231 /* fall through... */ 232 default: 233 return tok; 234 } 235 } 236 237 238 int 239 yyerror(char *fmt, ...) 240 { 241 va_list ap; 242 243 va_start(ap, fmt); 244 col_cleanup(0); 245 fprintf(stderr, "%s:%d: ", fsi_filename ? fsi_filename : "/dev/stdin", ayylineno); 246 vfprintf(stderr, fmt, ap); 247 fputc('\n', stderr); 248 parse_errors++; 249 va_end(ap); 250 return 0; 251 } 252 253 254 ioloc * 255 current_location(void) 256 { 257 ioloc *ip = CALLOC(struct ioloc); 258 ip->i_line = ayylineno; 259 ip->i_file = fsi_filename; 260 return ip; 261 } 262 263 264 /* 265 * some systems such as DU-4.x have a different GNU flex in /usr/bin 266 * which automatically generates yywrap macros and symbols. So I must 267 * distinguish between them and when yywrap is actually needed. 268 */ 269 #ifndef yywrap 270 int yywrap(void) 271 { 272 return 1; 273 } 274 #endif /* not yywrap */ 275