| 1 | /* munchconfig.c |
| 2 | |
| 3 | A very, very (very!) simple program to process a config_h.sh file on |
| 4 | non-unix systems. |
| 5 | |
| 6 | usage: |
| 7 | munchconfig config.sh config_h.sh [-f file] [foo=bar [baz=xyzzy [...]]] >config.h |
| 8 | |
| 9 | which is to say, it takes as its first parameter a config.sh (or |
| 10 | equivalent), as its second a config_h.sh (or equivalent), an optional file |
| 11 | containing tag=value pairs (one on each line), and an optional list of |
| 12 | tag=value pairs on the command line. |
| 13 | |
| 14 | It spits the processed config.h out to STDOUT. |
| 15 | |
| 16 | */ |
| 17 | |
| 18 | #include <stdio.h> |
| 19 | #include <errno.h> |
| 20 | #include <stdlib.h> |
| 21 | #include <string.h> |
| 22 | #include <ctype.h> |
| 23 | #include <unistd.h> |
| 24 | |
| 25 | /* The failure code to exit with */ |
| 26 | #ifndef EXIT_FAILURE |
| 27 | #ifdef VMS |
| 28 | #define EXIT_FAILURE 0 |
| 29 | #else |
| 30 | #define EXIT_FAILURE -1 |
| 31 | #endif |
| 32 | #endif |
| 33 | |
| 34 | /* The biggest line we can read in from a file */ |
| 35 | #define LINEBUFFERSIZE 1024 |
| 36 | #define NUMTILDESUBS 30 |
| 37 | #define NUMCONFIGSUBS 1000 |
| 38 | #define TOKENBUFFERSIZE 80 |
| 39 | |
| 40 | typedef struct { |
| 41 | char Tag[TOKENBUFFERSIZE]; |
| 42 | char Value[512]; |
| 43 | } Translate; |
| 44 | |
| 45 | void tilde_sub(char [], Translate [], int); |
| 46 | |
| 47 | int |
| 48 | main(int argc, char *argv[]) |
| 49 | { |
| 50 | int c, i; |
| 51 | char *ifile = NULL; |
| 52 | char WorkString[LINEBUFFERSIZE]; |
| 53 | FILE *ConfigSH, *Config_H, *Extra_Subs; |
| 54 | char LineBuffer[LINEBUFFERSIZE], *TempValue, *StartTilde, *EndTilde; |
| 55 | char SecondaryLineBuffer[LINEBUFFERSIZE], OutBuf[LINEBUFFERSIZE]; |
| 56 | char TokenBuffer[TOKENBUFFERSIZE]; |
| 57 | int LineBufferLength, TempLength, DummyVariable, LineBufferLoop; |
| 58 | int TokenBufferLoop, ConfigSubLoop, GotIt, OutBufPos; |
| 59 | Translate TildeSub[NUMTILDESUBS]; /* Holds the tilde (~FOO~) */ |
| 60 | /* substitutions */ |
| 61 | Translate ConfigSub[NUMCONFIGSUBS]; /* Holds the substitutions from */ |
| 62 | /* config.sh */ |
| 63 | int TildeSubCount = 0, ConfigSubCount = 0; /* # of tilde substitutions */ |
| 64 | /* and config substitutions, */ |
| 65 | /* respectively */ |
| 66 | if (argc < 3) { |
| 67 | printf("Usage: munchconfig config.sh config_h.sh [-f file] [foo=bar [baz=xyzzy [...]]]\n"); |
| 68 | exit(EXIT_FAILURE); |
| 69 | } |
| 70 | |
| 71 | optind = 3; /* skip config.sh and config_h.sh */ |
| 72 | while ((c = getopt(argc, argv, "f:")) != -1) { |
| 73 | switch (c) { |
| 74 | case 'f': |
| 75 | ifile = optarg; |
| 76 | break; |
| 77 | case ':': |
| 78 | fprintf(stderr, "Option -%c requires an operand\n", optopt); |
| 79 | break; |
| 80 | case '?': |
| 81 | fprintf(stderr,"Unrecognised option: -%c\n", optopt); |
| 82 | } |
| 83 | } |
| 84 | |
| 85 | /* First, open the input files */ |
| 86 | if (NULL == (ConfigSH = fopen(argv[1], "r"))) { |
| 87 | printf("Error %i trying to open config.sh file %s\n", errno, argv[1]); |
| 88 | exit(EXIT_FAILURE); |
| 89 | } |
| 90 | |
| 91 | if (NULL == (Config_H = fopen(argv[2], "r"))) { |
| 92 | printf("Error %i trying to open config_h.sh file %s\n", errno, argv[2]); |
| 93 | exit(EXIT_FAILURE); |
| 94 | } |
| 95 | |
| 96 | if (ifile != NULL && NULL == (Extra_Subs = fopen(ifile, "r"))) { |
| 97 | printf("Error %i trying to open extra substitutions file %s\n", errno, ifile); |
| 98 | exit(EXIT_FAILURE); |
| 99 | } |
| 100 | |
| 101 | /* Any tag/value pairs on the command line? */ |
| 102 | if (argc > optind) { |
| 103 | for (i=optind; i < argc && argv[i]; i++) { |
| 104 | /* Local copy */ |
| 105 | strcpy(WorkString, argv[i]); |
| 106 | /* Stick a NULL over the = */ |
| 107 | TempValue = strchr(WorkString, '='); |
| 108 | *TempValue++ = '\0'; |
| 109 | |
| 110 | /* Copy the tag and value into the holding array */ |
| 111 | strcpy(TildeSub[TildeSubCount].Tag, WorkString); |
| 112 | strcpy(TildeSub[TildeSubCount].Value, TempValue); |
| 113 | TildeSubCount++; |
| 114 | } |
| 115 | } |
| 116 | |
| 117 | /* Now read in the tag/value pairs from the extra substitutions file, if any */ |
| 118 | while(ifile && fgets(LineBuffer, LINEBUFFERSIZE - 1, Extra_Subs)) { |
| 119 | /* Force a trailing null, just in case */ |
| 120 | LineBuffer[LINEBUFFERSIZE - 1] = '\0'; |
| 121 | LineBufferLength = strlen(LineBuffer); |
| 122 | |
| 123 | /* Chop trailing control characters */ |
| 124 | while((LineBufferLength > 0) && (LineBuffer[LineBufferLength-1] < ' ')) { |
| 125 | LineBuffer[LineBufferLength - 1] = '\0'; |
| 126 | LineBufferLength--; |
| 127 | } |
| 128 | |
| 129 | /* If it's empty, then try again */ |
| 130 | if (!*LineBuffer) |
| 131 | continue; |
| 132 | |
| 133 | /* Local copy */ |
| 134 | strcpy(WorkString, LineBuffer); |
| 135 | /* Stick a NULL over the = */ |
| 136 | TempValue = strchr(WorkString, '='); |
| 137 | *TempValue++ = '\0'; |
| 138 | |
| 139 | /* Copy the tag and value into the holding array */ |
| 140 | strcpy(TildeSub[TildeSubCount].Tag, WorkString); |
| 141 | strcpy(TildeSub[TildeSubCount].Value, TempValue); |
| 142 | TildeSubCount++; |
| 143 | } |
| 144 | |
| 145 | |
| 146 | /* Now read in the config.sh file. */ |
| 147 | while(fgets(LineBuffer, LINEBUFFERSIZE - 1, ConfigSH)) { |
| 148 | /* Force a trailing null, just in case */ |
| 149 | LineBuffer[LINEBUFFERSIZE - 1] = '\0'; |
| 150 | |
| 151 | LineBufferLength = strlen(LineBuffer); |
| 152 | |
| 153 | /* Chop trailing control characters */ |
| 154 | while((LineBufferLength > 0) && (LineBuffer[LineBufferLength-1] < ' ')) { |
| 155 | LineBuffer[LineBufferLength - 1] = '\0'; |
| 156 | LineBufferLength--; |
| 157 | } |
| 158 | |
| 159 | /* If it's empty, then try again */ |
| 160 | if (!*LineBuffer) |
| 161 | continue; |
| 162 | |
| 163 | /* If the line begins with a '#' or ' ', skip */ |
| 164 | if ((LineBuffer[0] == ' ') || (LineBuffer[0] == '#')) |
| 165 | continue; |
| 166 | |
| 167 | /* We've got something. Guess we need to actually handle it */ |
| 168 | /* Do the tilde substitution */ |
| 169 | tilde_sub(LineBuffer, TildeSub, TildeSubCount); |
| 170 | |
| 171 | /* Stick a NULL over the = */ |
| 172 | TempValue = strchr(LineBuffer, '='); |
| 173 | *TempValue++ = '\0'; |
| 174 | /* And another over the leading ', which better be there */ |
| 175 | *TempValue++ = '\0'; |
| 176 | |
| 177 | /* Check to see if there's a trailing ' or ". If not, add a newline to |
| 178 | the buffer and grab another line. */ |
| 179 | TempLength = strlen(TempValue); |
| 180 | while ((TempValue[TempLength-1] != '\'') && |
| 181 | (TempValue[TempLength-1] != '"')) { |
| 182 | fgets(SecondaryLineBuffer, LINEBUFFERSIZE - 1, ConfigSH); |
| 183 | /* Force a trailing null, just in case */ |
| 184 | SecondaryLineBuffer[LINEBUFFERSIZE - 1] = '\0'; |
| 185 | /* Go substitute */ |
| 186 | tilde_sub(SecondaryLineBuffer, TildeSub, TildeSubCount); |
| 187 | /* Tack a nweline on the end of our primary buffer */ |
| 188 | strcat(TempValue, "\n"); |
| 189 | /* Concat the new line we just read */ |
| 190 | strcat(TempValue, SecondaryLineBuffer); |
| 191 | |
| 192 | /* Refigure the length */ |
| 193 | TempLength = strlen(TempValue); |
| 194 | |
| 195 | /* Chop trailing control characters */ |
| 196 | while((TempLength > 0) && (TempValue[TempLength-1] < ' ')) { |
| 197 | TempValue[TempLength - 1] = '\0'; |
| 198 | TempLength--; |
| 199 | } |
| 200 | } |
| 201 | |
| 202 | /* And finally one over the trailing ' */ |
| 203 | TempValue[TempLength-1] = '\0'; |
| 204 | |
| 205 | /* Is there even anything left? */ |
| 206 | if(*TempValue) { |
| 207 | /* Copy the tag over */ |
| 208 | strcpy(ConfigSub[ConfigSubCount].Tag, LineBuffer); |
| 209 | /* Copy the value over */ |
| 210 | strcpy(ConfigSub[ConfigSubCount].Value, TempValue); |
| 211 | |
| 212 | /* Up the count */ |
| 213 | ConfigSubCount++; |
| 214 | |
| 215 | } |
| 216 | } |
| 217 | |
| 218 | /* Okay, we've read in all the substitutions from our config.sh */ |
| 219 | /* equivalent. Read in the config_h.sh equiv and start the substitution */ |
| 220 | |
| 221 | /* First, eat all the lines until we get to one with !GROK!THIS! in it */ |
| 222 | while(!strstr(fgets(LineBuffer, LINEBUFFERSIZE, Config_H), |
| 223 | "!GROK!THIS!")) { |
| 224 | |
| 225 | /* Dummy statement to shut up any compiler that'll whine about an empty */ |
| 226 | /* loop */ |
| 227 | DummyVariable++; |
| 228 | } |
| 229 | |
| 230 | /* Right, we've read all the lines through the first one with !GROK!THIS! */ |
| 231 | /* in it. That gets us through the beginning stuff. Now start in earnest */ |
| 232 | /* with our translations, which run until we get to another !GROK!THIS! */ |
| 233 | while(!strstr(fgets(LineBuffer, LINEBUFFERSIZE, Config_H), |
| 234 | "!GROK!THIS!")) { |
| 235 | /* Force a trailing null, just in case */ |
| 236 | LineBuffer[LINEBUFFERSIZE - 1] = '\0'; |
| 237 | |
| 238 | /* Tilde Substitute */ |
| 239 | tilde_sub(LineBuffer, TildeSub, TildeSubCount); |
| 240 | |
| 241 | LineBufferLength = strlen(LineBuffer); |
| 242 | |
| 243 | /* Chop trailing control characters */ |
| 244 | while((LineBufferLength > 0) && (LineBuffer[LineBufferLength-1] < ' ')) { |
| 245 | LineBuffer[LineBufferLength - 1] = '\0'; |
| 246 | LineBufferLength--; |
| 247 | } |
| 248 | |
| 249 | OutBufPos = 0; |
| 250 | /* Right. Go looking for $s. */ |
| 251 | for(LineBufferLoop = 0; LineBufferLoop < LineBufferLength; |
| 252 | LineBufferLoop++) { |
| 253 | /* Did we find one? */ |
| 254 | if ('$' != LineBuffer[LineBufferLoop]) { |
| 255 | /* Nope, spit out the value */ |
| 256 | OutBuf[OutBufPos++] = LineBuffer[LineBufferLoop]; |
| 257 | } else { |
| 258 | /* Yes, we did. Is it escaped? */ |
| 259 | if ((LineBufferLoop > 0) && ('\\' == LineBuffer[LineBufferLoop - |
| 260 | 1])) { |
| 261 | /* Yup. Spit it out */ |
| 262 | OutBuf[OutBufPos++] = LineBuffer[LineBufferLoop]; |
| 263 | } else { |
| 264 | /* Nope. Go grab us a token */ |
| 265 | TokenBufferLoop = 0; |
| 266 | /* Advance to the next character in the input stream */ |
| 267 | LineBufferLoop++; |
| 268 | while((LineBufferLoop < LineBufferLength) && |
| 269 | ((isalnum(LineBuffer[LineBufferLoop]) || ('_' == |
| 270 | LineBuffer[LineBufferLoop])))) { |
| 271 | TokenBuffer[TokenBufferLoop] = LineBuffer[LineBufferLoop]; |
| 272 | LineBufferLoop++; |
| 273 | TokenBufferLoop++; |
| 274 | } |
| 275 | |
| 276 | /* Trailing null on the token buffer */ |
| 277 | TokenBuffer[TokenBufferLoop] = '\0'; |
| 278 | |
| 279 | /* Back the line buffer pointer up one */ |
| 280 | LineBufferLoop--; |
| 281 | |
| 282 | /* Right, we're done grabbing a token. Check to make sure we got */ |
| 283 | /* something */ |
| 284 | if (TokenBufferLoop) { |
| 285 | /* Well, we do. Run through all the tokens we've got in the */ |
| 286 | /* ConfigSub array and see if any match */ |
| 287 | GotIt = 0; |
| 288 | for(ConfigSubLoop = 0; ConfigSubLoop < ConfigSubCount; |
| 289 | ConfigSubLoop++) { |
| 290 | if (!strcmp(TokenBuffer, ConfigSub[ConfigSubLoop].Tag)) { |
| 291 | char *cp = ConfigSub[ConfigSubLoop].Value; |
| 292 | GotIt = 1; |
| 293 | while (*cp) OutBuf[OutBufPos++] = *(cp++); |
| 294 | break; |
| 295 | } |
| 296 | } |
| 297 | |
| 298 | /* Did we find something? If not, spit out what was in our */ |
| 299 | /* buffer */ |
| 300 | if (!GotIt) { |
| 301 | char *cp = TokenBuffer; |
| 302 | OutBuf[OutBufPos++] = '$'; |
| 303 | while (*cp) OutBuf[OutBufPos++] = *(cp++); |
| 304 | } |
| 305 | |
| 306 | } else { |
| 307 | /* Just a bare $. Spit it out */ |
| 308 | OutBuf[OutBufPos++] = '$'; |
| 309 | } |
| 310 | } |
| 311 | } |
| 312 | } |
| 313 | |
| 314 | /* If we've created an #undef line, make sure we don't output anything |
| 315 | * after the "#undef FOO" besides comments. We could do this as we |
| 316 | * go by recognizing the #undef as it goes by, and thus avoid another |
| 317 | * use of a fixed-length buffer, but this is simpler. |
| 318 | */ |
| 319 | if (!strncmp(OutBuf,"#undef",6)) { |
| 320 | char *cp = OutBuf; |
| 321 | int i, incomment = 0; |
| 322 | LineBufferLoop = 0; |
| 323 | OutBuf[OutBufPos] = '\0'; |
| 324 | for (i = 0; i <= 1; i++) { |
| 325 | while (!isspace(*cp)) LineBuffer[LineBufferLoop++] = *(cp++); |
| 326 | while ( isspace(*cp)) LineBuffer[LineBufferLoop++] = *(cp++); |
| 327 | } |
| 328 | while (*cp) { |
| 329 | while (isspace(*cp)) LineBuffer[LineBufferLoop++] = *(cp++); |
| 330 | if (!incomment && *cp == '/' && *(cp+1) == '*') incomment = 1; |
| 331 | while (*cp && !isspace(*cp)) { |
| 332 | if (incomment) LineBuffer[LineBufferLoop++] = *cp; |
| 333 | cp++; |
| 334 | } |
| 335 | if (incomment && *cp == '*' && *(cp+1) == '/') incomment = 0; |
| 336 | } |
| 337 | LineBuffer[LineBufferLoop] = '\0'; |
| 338 | puts(LineBuffer); |
| 339 | } |
| 340 | else { |
| 341 | OutBuf[OutBufPos] = '\0'; |
| 342 | puts(OutBuf); |
| 343 | } |
| 344 | } |
| 345 | |
| 346 | /* Close the files */ |
| 347 | fclose(ConfigSH); |
| 348 | fclose(Config_H); |
| 349 | if (ifile) fclose(Extra_Subs); |
| 350 | } |
| 351 | |
| 352 | void |
| 353 | tilde_sub(char LineBuffer[], Translate TildeSub[], int TildeSubCount) |
| 354 | { |
| 355 | char TempBuffer[LINEBUFFERSIZE], TempTilde[TOKENBUFFERSIZE]; |
| 356 | int TildeLoop, InTilde, CopiedBufferLength, TildeBufferLength, k, GotIt; |
| 357 | int TempLength; |
| 358 | InTilde = 0; |
| 359 | CopiedBufferLength = 0; |
| 360 | TildeBufferLength = 0; |
| 361 | TempLength = strlen(LineBuffer); |
| 362 | |
| 363 | /* Grovel over our input looking for ~foo~ constructs */ |
| 364 | for(TildeLoop = 0; TildeLoop < TempLength; TildeLoop++) { |
| 365 | /* Are we in a tilde? */ |
| 366 | if (InTilde) { |
| 367 | /* Yup. Is the current character a tilde? */ |
| 368 | if (LineBuffer[TildeLoop] == '~') { |
| 369 | /* Yup. That means we're ready to do a substitution */ |
| 370 | InTilde = 0; |
| 371 | GotIt = 0; |
| 372 | /* Trailing null */ |
| 373 | TempTilde[TildeBufferLength] = '\0'; |
| 374 | for( k=0; k < TildeSubCount; k++) { |
| 375 | if (!strcmp(TildeSub[k].Tag, TempTilde)) { |
| 376 | GotIt = 1; |
| 377 | /* Tack on the trailing null to the main buffer */ |
| 378 | TempBuffer[CopiedBufferLength] = '\0'; |
| 379 | /* Copy the tilde substitution over */ |
| 380 | strcat(TempBuffer, TildeSub[k].Value); |
| 381 | CopiedBufferLength = strlen(TempBuffer); |
| 382 | } |
| 383 | } |
| 384 | |
| 385 | /* Did we find anything? */ |
| 386 | if (GotIt == 0) { |
| 387 | /* Guess not. Copy the whole thing out verbatim */ |
| 388 | TempBuffer[CopiedBufferLength] = '\0'; |
| 389 | TempBuffer[CopiedBufferLength++] = '~'; |
| 390 | TempBuffer[CopiedBufferLength] = '\0'; |
| 391 | strcat(TempBuffer, TempTilde); |
| 392 | strcat(TempBuffer, "~"); |
| 393 | CopiedBufferLength = strlen(TempBuffer); |
| 394 | } |
| 395 | |
| 396 | } else { |
| 397 | /* 'Kay, not a tilde. Is it a word character? */ |
| 398 | if (isalnum(LineBuffer[TildeLoop]) || |
| 399 | (LineBuffer[TildeLoop] == '-')) { |
| 400 | TempTilde[TildeBufferLength++] = LineBuffer[TildeLoop]; |
| 401 | } else { |
| 402 | /* No, it's not a tilde character. For shame! We've got a */ |
| 403 | /* bogus token. Copy a ~ into the output buffer, then append */ |
| 404 | /* whatever we've got in our token buffer */ |
| 405 | TempBuffer[CopiedBufferLength++] = '~'; |
| 406 | TempBuffer[CopiedBufferLength] = '\0'; |
| 407 | TempTilde[TildeBufferLength] = '\0'; |
| 408 | strcat(TempBuffer, TempTilde); |
| 409 | CopiedBufferLength += TildeBufferLength; |
| 410 | InTilde = 0; |
| 411 | } |
| 412 | } |
| 413 | } else { |
| 414 | /* We're not in a tilde. Do we want to be? */ |
| 415 | if (LineBuffer[TildeLoop] == '~') { |
| 416 | /* Guess so */ |
| 417 | InTilde = 1; |
| 418 | TildeBufferLength = 0; |
| 419 | } else { |
| 420 | /* Nope. Copy the character to the output buffer */ |
| 421 | TempBuffer[CopiedBufferLength++] = LineBuffer[TildeLoop]; |
| 422 | } |
| 423 | } |
| 424 | } |
| 425 | |
| 426 | /* Out of the loop. First, double-check to see if there was anything */ |
| 427 | /* pending. */ |
| 428 | if (InTilde) { |
| 429 | /* bogus token. Copy a ~ into the output buffer, then append */ |
| 430 | /* whatever we've got in our token buffer */ |
| 431 | TempBuffer[CopiedBufferLength++] = '~'; |
| 432 | TempBuffer[CopiedBufferLength] = '\0'; |
| 433 | TempTilde[TildeBufferLength] = '\0'; |
| 434 | strcat(TempBuffer, TempTilde); |
| 435 | CopiedBufferLength += TildeBufferLength; |
| 436 | } else { |
| 437 | /* Nope, nothing pensing. Tack on a \0 */ |
| 438 | TempBuffer[CopiedBufferLength] = '\0'; |
| 439 | } |
| 440 | |
| 441 | /* Okay, we're done. Copy the temp buffer back into the line buffer */ |
| 442 | strcpy(LineBuffer, TempBuffer); |
| 443 | |
| 444 | } |
| 445 | |