| Commit | Line | Data |
|---|
| 378cc40b |
1 | /* $Header: eval.c,v 2.0 88/06/05 00:08:48 root Exp $ |
| 2 | * |
| 3 | * $Log: eval.c,v $ |
| 4 | * Revision 2.0 88/06/05 00:08:48 root |
| 5 | * Baseline version 2.0. |
| 6 | * |
| 7 | */ |
| 8 | |
| 9 | #include "EXTERN.h" |
| 10 | #include "perl.h" |
| 11 | |
| 12 | #include <signal.h> |
| 13 | #include <errno.h> |
| 14 | |
| 15 | extern int errno; |
| 16 | |
| 17 | #ifdef VOIDSIG |
| 18 | static void (*ihand)(); |
| 19 | static void (*qhand)(); |
| 20 | #else |
| 21 | static int (*ihand)(); |
| 22 | static int (*qhand)(); |
| 23 | #endif |
| 24 | |
| 25 | ARG *debarg; |
| 26 | STR str_args; |
| 27 | |
| 28 | STR * |
| 29 | eval(arg,retary,sargoff) |
| 30 | register ARG *arg; |
| 31 | STR ***retary; /* where to return an array to, null if nowhere */ |
| 32 | int sargoff; /* how many elements in sarg are already assigned */ |
| 33 | { |
| 34 | register STR *str; |
| 35 | register int anum; |
| 36 | register int optype; |
| 37 | int maxarg; |
| 38 | int maxsarg; |
| 39 | double value; |
| 40 | STR *quicksarg[5]; |
| 41 | register STR **sarg = quicksarg; |
| 42 | register char *tmps; |
| 43 | char *tmps2; |
| 44 | int argflags; |
| 45 | int argtype; |
| 46 | union argptr argptr; |
| 47 | int cushion; |
| 48 | unsigned long tmplong; |
| 49 | long when; |
| 50 | FILE *fp; |
| 51 | STR *tmpstr; |
| 52 | FCMD *form; |
| 53 | STAB *stab; |
| 54 | ARRAY *ary; |
| 55 | bool assigning = FALSE; |
| 56 | double exp(), log(), sqrt(), modf(); |
| 57 | char *crypt(), *getenv(); |
| 58 | |
| 59 | if (!arg) |
| 60 | return &str_no; |
| 61 | str = arg->arg_ptr.arg_str; |
| 62 | optype = arg->arg_type; |
| 63 | maxsarg = maxarg = arg->arg_len; |
| 64 | if (maxsarg > 3 || retary) { |
| 65 | if (sargoff >= 0) { /* array already exists, just append to it */ |
| 66 | cushion = 10; |
| 67 | sarg = (STR **)saferealloc((char*)*retary, |
| 68 | (maxsarg+sargoff+2+cushion) * sizeof(STR*)) + sargoff; |
| 69 | /* Note that sarg points into the middle of the array */ |
| 70 | } |
| 71 | else { |
| 72 | sargoff = cushion = 0; |
| 73 | sarg = (STR **)safemalloc((maxsarg+2) * sizeof(STR*)); |
| 74 | } |
| 75 | } |
| 76 | else |
| 77 | sargoff = 0; |
| 78 | #ifdef DEBUGGING |
| 79 | if (debug) { |
| 80 | if (debug & 8) { |
| 81 | deb("%s (%lx) %d args:\n",opname[optype],arg,maxarg); |
| 82 | } |
| 83 | debname[dlevel] = opname[optype][0]; |
| 84 | debdelim[dlevel++] = ':'; |
| 85 | } |
| 86 | #endif |
| 87 | for (anum = 1; anum <= maxarg; anum++) { |
| 88 | argflags = arg[anum].arg_flags; |
| 89 | if (argflags & AF_SPECIAL) |
| 90 | continue; |
| 91 | argtype = arg[anum].arg_type; |
| 92 | argptr = arg[anum].arg_ptr; |
| 93 | re_eval: |
| 94 | switch (argtype) { |
| 95 | default: |
| 96 | sarg[anum] = &str_no; |
| 97 | #ifdef DEBUGGING |
| 98 | tmps = "NULL"; |
| 99 | #endif |
| 100 | break; |
| 101 | case A_EXPR: |
| 102 | #ifdef DEBUGGING |
| 103 | if (debug & 8) { |
| 104 | tmps = "EXPR"; |
| 105 | deb("%d.EXPR =>\n",anum); |
| 106 | } |
| 107 | #endif |
| 108 | if (retary && |
| 109 | (optype == O_LIST || optype == O_ITEM2 || optype == O_ITEM3)) { |
| 110 | *retary = sarg - sargoff; |
| 111 | eval(argptr.arg_arg, retary, anum - 1 + sargoff); |
| 112 | sarg = *retary; /* they do realloc it... */ |
| 113 | argtype = maxarg - anum; /* how many left? */ |
| 114 | maxsarg = (int)(str_gnum(sarg[0])) + argtype; |
| 115 | sargoff = maxsarg - maxarg; |
| 116 | if (argtype > 9 - cushion) { /* we don't have room left */ |
| 117 | sarg = (STR **)saferealloc((char*)sarg, |
| 118 | (maxsarg+2+cushion) * sizeof(STR*)); |
| 119 | } |
| 120 | sarg += sargoff; |
| 121 | } |
| 122 | else |
| 123 | sarg[anum] = eval(argptr.arg_arg, Null(STR***),-1); |
| 124 | break; |
| 125 | case A_CMD: |
| 126 | #ifdef DEBUGGING |
| 127 | if (debug & 8) { |
| 128 | tmps = "CMD"; |
| 129 | deb("%d.CMD (%lx) =>\n",anum,argptr.arg_cmd); |
| 130 | } |
| 131 | #endif |
| 132 | sarg[anum] = cmd_exec(argptr.arg_cmd); |
| 133 | break; |
| 134 | case A_STAB: |
| 135 | sarg[anum] = STAB_STR(argptr.arg_stab); |
| 136 | #ifdef DEBUGGING |
| 137 | if (debug & 8) { |
| 138 | sprintf(buf,"STAB $%s",argptr.arg_stab->stab_name); |
| 139 | tmps = buf; |
| 140 | } |
| 141 | #endif |
| 142 | break; |
| 143 | case A_LEXPR: |
| 144 | #ifdef DEBUGGING |
| 145 | if (debug & 8) { |
| 146 | tmps = "LEXPR"; |
| 147 | deb("%d.LEXPR =>\n",anum); |
| 148 | } |
| 149 | #endif |
| 150 | str = eval(argptr.arg_arg,Null(STR***),-1); |
| 151 | if (!str) |
| 152 | fatal("panic: A_LEXPR"); |
| 153 | goto do_crement; |
| 154 | case A_LVAL: |
| 155 | #ifdef DEBUGGING |
| 156 | if (debug & 8) { |
| 157 | sprintf(buf,"LVAL $%s",argptr.arg_stab->stab_name); |
| 158 | tmps = buf; |
| 159 | } |
| 160 | #endif |
| 161 | str = STAB_STR(argptr.arg_stab); |
| 162 | if (!str) |
| 163 | fatal("panic: A_LVAL"); |
| 164 | do_crement: |
| 165 | assigning = TRUE; |
| 166 | if (argflags & AF_PRE) { |
| 167 | if (argflags & AF_UP) |
| 168 | str_inc(str); |
| 169 | else |
| 170 | str_dec(str); |
| 171 | STABSET(str); |
| 172 | sarg[anum] = str; |
| 173 | str = arg->arg_ptr.arg_str; |
| 174 | } |
| 175 | else if (argflags & AF_POST) { |
| 176 | sarg[anum] = str_static(str); |
| 177 | if (argflags & AF_UP) |
| 178 | str_inc(str); |
| 179 | else |
| 180 | str_dec(str); |
| 181 | STABSET(str); |
| 182 | str = arg->arg_ptr.arg_str; |
| 183 | } |
| 184 | else { |
| 185 | sarg[anum] = str; |
| 186 | } |
| 187 | break; |
| 188 | case A_LARYLEN: |
| 189 | str = sarg[anum] = |
| 190 | argptr.arg_stab->stab_array->ary_magic; |
| 191 | #ifdef DEBUGGING |
| 192 | tmps = "LARYLEN"; |
| 193 | #endif |
| 194 | if (!str) |
| 195 | fatal("panic: A_LEXPR"); |
| 196 | goto do_crement; |
| 197 | case A_ARYLEN: |
| 198 | stab = argptr.arg_stab; |
| 199 | sarg[anum] = stab->stab_array->ary_magic; |
| 200 | str_numset(sarg[anum],(double)(stab->stab_array->ary_fill+arybase)); |
| 201 | #ifdef DEBUGGING |
| 202 | tmps = "ARYLEN"; |
| 203 | #endif |
| 204 | break; |
| 205 | case A_SINGLE: |
| 206 | sarg[anum] = argptr.arg_str; |
| 207 | #ifdef DEBUGGING |
| 208 | tmps = "SINGLE"; |
| 209 | #endif |
| 210 | break; |
| 211 | case A_DOUBLE: |
| 212 | (void) interp(str,str_get(argptr.arg_str)); |
| 213 | sarg[anum] = str; |
| 214 | #ifdef DEBUGGING |
| 215 | tmps = "DOUBLE"; |
| 216 | #endif |
| 217 | break; |
| 218 | case A_BACKTICK: |
| 219 | tmps = str_get(argptr.arg_str); |
| 220 | fp = popen(str_get(interp(str,tmps)),"r"); |
| 221 | tmpstr = str_new(80); |
| 222 | str_set(str,""); |
| 223 | if (fp) { |
| 224 | while (str_gets(tmpstr,fp) != Nullch) { |
| 225 | str_scat(str,tmpstr); |
| 226 | } |
| 227 | statusvalue = pclose(fp); |
| 228 | } |
| 229 | else |
| 230 | statusvalue = -1; |
| 231 | str_free(tmpstr); |
| 232 | |
| 233 | sarg[anum] = str; |
| 234 | #ifdef DEBUGGING |
| 235 | tmps = "BACK"; |
| 236 | #endif |
| 237 | break; |
| 238 | case A_INDREAD: |
| 239 | last_in_stab = stabent(str_get(STAB_STR(argptr.arg_stab)),TRUE); |
| 240 | goto do_read; |
| 241 | case A_GLOB: |
| 242 | argflags |= AF_POST; /* enable newline chopping */ |
| 243 | case A_READ: |
| 244 | last_in_stab = argptr.arg_stab; |
| 245 | do_read: |
| 246 | fp = Nullfp; |
| 247 | if (last_in_stab->stab_io) { |
| 248 | fp = last_in_stab->stab_io->fp; |
| 249 | if (!fp) { |
| 250 | if (last_in_stab->stab_io->flags & IOF_ARGV) { |
| 251 | if (last_in_stab->stab_io->flags & IOF_START) { |
| 252 | last_in_stab->stab_io->flags &= ~IOF_START; |
| 253 | last_in_stab->stab_io->lines = 0; |
| 254 | if (alen(last_in_stab->stab_array) < 0) { |
| 255 | tmpstr = str_make("-"); /* assume stdin */ |
| 256 | apush(last_in_stab->stab_array, tmpstr); |
| 257 | } |
| 258 | } |
| 259 | fp = nextargv(last_in_stab); |
| 260 | if (!fp) /* Note: fp != last_in_stab->stab_io->fp */ |
| 261 | do_close(last_in_stab,FALSE); /* now it does */ |
| 262 | } |
| 263 | else if (argtype == A_GLOB) { |
| 264 | (void) interp(str,str_get(last_in_stab->stab_val)); |
| 265 | tmps = str->str_ptr; |
| 266 | if (*tmps == '!') |
| 267 | sprintf(tokenbuf,"%s|",tmps+1); |
| 268 | else { |
| 269 | if (*tmps == ';') |
| 270 | sprintf(tokenbuf, "%s", tmps+1); |
| 271 | else |
| 272 | sprintf(tokenbuf, "echo %s", tmps); |
| 273 | strcat(tokenbuf, |
| 274 | "|tr -s ' \t\f\r' '\\012\\012\\012\\012'|"); |
| 275 | } |
| 276 | do_open(last_in_stab,tokenbuf); |
| 277 | fp = last_in_stab->stab_io->fp; |
| 278 | } |
| 279 | } |
| 280 | } |
| 281 | if (!fp && dowarn) |
| 282 | warn("Read on closed filehandle <%s>",last_in_stab->stab_name); |
| 283 | keepgoing: |
| 284 | if (!fp) |
| 285 | sarg[anum] = &str_no; |
| 286 | else if (!str_gets(str,fp)) { |
| 287 | if (last_in_stab->stab_io->flags & IOF_ARGV) { |
| 288 | fp = nextargv(last_in_stab); |
| 289 | if (fp) |
| 290 | goto keepgoing; |
| 291 | do_close(last_in_stab,FALSE); |
| 292 | last_in_stab->stab_io->flags |= IOF_START; |
| 293 | } |
| 294 | else if (argflags & AF_POST) { |
| 295 | do_close(last_in_stab,FALSE); |
| 296 | } |
| 297 | if (fp == stdin) { |
| 298 | clearerr(fp); |
| 299 | } |
| 300 | sarg[anum] = &str_no; |
| 301 | if (retary) { |
| 302 | maxarg = anum - 1; |
| 303 | maxsarg = maxarg + sargoff; |
| 304 | } |
| 305 | break; |
| 306 | } |
| 307 | else { |
| 308 | last_in_stab->stab_io->lines++; |
| 309 | sarg[anum] = str; |
| 310 | if (argflags & AF_POST) { |
| 311 | if (str->str_cur > 0) |
| 312 | str->str_cur--; |
| 313 | str->str_ptr[str->str_cur] = '\0'; |
| 314 | } |
| 315 | if (retary) { |
| 316 | sarg[anum] = str_static(sarg[anum]); |
| 317 | anum++; |
| 318 | if (anum > maxarg) { |
| 319 | maxarg = anum + anum; |
| 320 | maxsarg = maxarg + sargoff; |
| 321 | sarg = (STR **)saferealloc((char*)(sarg-sargoff), |
| 322 | (maxsarg+2+cushion) * sizeof(STR*)) + sargoff; |
| 323 | } |
| 324 | goto keepgoing; |
| 325 | } |
| 326 | } |
| 327 | if (retary) { |
| 328 | maxarg = anum - 1; |
| 329 | maxsarg = maxarg + sargoff; |
| 330 | } |
| 331 | #ifdef DEBUGGING |
| 332 | tmps = "READ"; |
| 333 | #endif |
| 334 | break; |
| 335 | } |
| 336 | #ifdef DEBUGGING |
| 337 | if (debug & 8) |
| 338 | deb("%d.%s = '%s'\n",anum,tmps,str_peek(sarg[anum])); |
| 339 | #endif |
| 340 | } |
| 341 | switch (optype) { |
| 342 | case O_ITEM: |
| 343 | if (maxarg > arg->arg_len) |
| 344 | goto array_return; |
| 345 | if (str != sarg[1]) |
| 346 | str_sset(str,sarg[1]); |
| 347 | STABSET(str); |
| 348 | break; |
| 349 | case O_ITEM2: |
| 350 | if (str != sarg[--anum]) |
| 351 | str_sset(str,sarg[anum]); |
| 352 | STABSET(str); |
| 353 | break; |
| 354 | case O_ITEM3: |
| 355 | if (str != sarg[--anum]) |
| 356 | str_sset(str,sarg[anum]); |
| 357 | STABSET(str); |
| 358 | break; |
| 359 | case O_CONCAT: |
| 360 | if (str != sarg[1]) |
| 361 | str_sset(str,sarg[1]); |
| 362 | str_scat(str,sarg[2]); |
| 363 | STABSET(str); |
| 364 | break; |
| 365 | case O_REPEAT: |
| 366 | if (str != sarg[1]) |
| 367 | str_sset(str,sarg[1]); |
| 368 | anum = (int)str_gnum(sarg[2]); |
| 369 | if (anum >= 1) { |
| 370 | tmpstr = str_new(0); |
| 371 | str_sset(tmpstr,str); |
| 372 | while (--anum > 0) |
| 373 | str_scat(str,tmpstr); |
| 374 | } |
| 375 | else |
| 376 | str_sset(str,&str_no); |
| 377 | STABSET(str); |
| 378 | break; |
| 379 | case O_MATCH: |
| 380 | str_sset(str, do_match(arg, |
| 381 | retary,sarg,&maxsarg,sargoff,cushion)); |
| 382 | if (retary) { |
| 383 | sarg = *retary; /* they realloc it */ |
| 384 | goto array_return; |
| 385 | } |
| 386 | STABSET(str); |
| 387 | break; |
| 388 | case O_NMATCH: |
| 389 | str_sset(str, do_match(arg, |
| 390 | retary,sarg,&maxsarg,sargoff,cushion)); |
| 391 | if (retary) { |
| 392 | sarg = *retary; /* they realloc it */ |
| 393 | goto array_return; /* ignore negation */ |
| 394 | } |
| 395 | str_set(str, str_true(str) ? No : Yes); |
| 396 | STABSET(str); |
| 397 | break; |
| 398 | case O_SUBST: |
| 399 | value = (double) do_subst(str, arg); |
| 400 | str = arg->arg_ptr.arg_str; |
| 401 | goto donumset; |
| 402 | case O_NSUBST: |
| 403 | str_set(arg->arg_ptr.arg_str, do_subst(str, arg) ? No : Yes); |
| 404 | str = arg->arg_ptr.arg_str; |
| 405 | break; |
| 406 | case O_ASSIGN: |
| 407 | if (arg[1].arg_flags & AF_SPECIAL) |
| 408 | do_assign(str,arg,sarg); |
| 409 | else { |
| 410 | if (str != sarg[2]) |
| 411 | str_sset(str, sarg[2]); |
| 412 | STABSET(str); |
| 413 | } |
| 414 | break; |
| 415 | case O_CHOP: |
| 416 | tmps = str_get(str); |
| 417 | tmps += str->str_cur - (str->str_cur != 0); |
| 418 | str_set(arg->arg_ptr.arg_str,tmps); /* remember last char */ |
| 419 | *tmps = '\0'; /* wipe it out */ |
| 420 | str->str_cur = tmps - str->str_ptr; |
| 421 | str->str_nok = 0; |
| 422 | str = arg->arg_ptr.arg_str; |
| 423 | break; |
| 424 | case O_STUDY: |
| 425 | value = (double)do_study(str); |
| 426 | str = arg->arg_ptr.arg_str; |
| 427 | goto donumset; |
| 428 | case O_MULTIPLY: |
| 429 | value = str_gnum(sarg[1]); |
| 430 | value *= str_gnum(sarg[2]); |
| 431 | goto donumset; |
| 432 | case O_DIVIDE: |
| 433 | if ((value = str_gnum(sarg[2])) == 0.0) |
| 434 | fatal("Illegal division by zero"); |
| 435 | value = str_gnum(sarg[1]) / value; |
| 436 | goto donumset; |
| 437 | case O_MODULO: |
| 438 | if ((tmplong = (unsigned long) str_gnum(sarg[2])) == 0L) |
| 439 | fatal("Illegal modulus zero"); |
| 440 | value = str_gnum(sarg[1]); |
| 441 | value = (double)(((unsigned long)value) % tmplong); |
| 442 | goto donumset; |
| 443 | case O_ADD: |
| 444 | value = str_gnum(sarg[1]); |
| 445 | value += str_gnum(sarg[2]); |
| 446 | goto donumset; |
| 447 | case O_SUBTRACT: |
| 448 | value = str_gnum(sarg[1]); |
| 449 | value -= str_gnum(sarg[2]); |
| 450 | goto donumset; |
| 451 | case O_LEFT_SHIFT: |
| 452 | value = str_gnum(sarg[1]); |
| 453 | anum = (int)str_gnum(sarg[2]); |
| 454 | value = (double)(((unsigned long)value) << anum); |
| 455 | goto donumset; |
| 456 | case O_RIGHT_SHIFT: |
| 457 | value = str_gnum(sarg[1]); |
| 458 | anum = (int)str_gnum(sarg[2]); |
| 459 | value = (double)(((unsigned long)value) >> anum); |
| 460 | goto donumset; |
| 461 | case O_LT: |
| 462 | value = str_gnum(sarg[1]); |
| 463 | value = (double)(value < str_gnum(sarg[2])); |
| 464 | goto donumset; |
| 465 | case O_GT: |
| 466 | value = str_gnum(sarg[1]); |
| 467 | value = (double)(value > str_gnum(sarg[2])); |
| 468 | goto donumset; |
| 469 | case O_LE: |
| 470 | value = str_gnum(sarg[1]); |
| 471 | value = (double)(value <= str_gnum(sarg[2])); |
| 472 | goto donumset; |
| 473 | case O_GE: |
| 474 | value = str_gnum(sarg[1]); |
| 475 | value = (double)(value >= str_gnum(sarg[2])); |
| 476 | goto donumset; |
| 477 | case O_EQ: |
| 478 | value = str_gnum(sarg[1]); |
| 479 | value = (double)(value == str_gnum(sarg[2])); |
| 480 | goto donumset; |
| 481 | case O_NE: |
| 482 | value = str_gnum(sarg[1]); |
| 483 | value = (double)(value != str_gnum(sarg[2])); |
| 484 | goto donumset; |
| 485 | case O_BIT_AND: |
| 486 | value = str_gnum(sarg[1]); |
| 487 | value = (double)(((unsigned long)value) & |
| 488 | (unsigned long)str_gnum(sarg[2])); |
| 489 | goto donumset; |
| 490 | case O_XOR: |
| 491 | value = str_gnum(sarg[1]); |
| 492 | value = (double)(((unsigned long)value) ^ |
| 493 | (unsigned long)str_gnum(sarg[2])); |
| 494 | goto donumset; |
| 495 | case O_BIT_OR: |
| 496 | value = str_gnum(sarg[1]); |
| 497 | value = (double)(((unsigned long)value) | |
| 498 | (unsigned long)str_gnum(sarg[2])); |
| 499 | goto donumset; |
| 500 | case O_AND: |
| 501 | if (str_true(sarg[1])) { |
| 502 | anum = 2; |
| 503 | optype = O_ITEM2; |
| 504 | argflags = arg[anum].arg_flags; |
| 505 | argtype = arg[anum].arg_type; |
| 506 | argptr = arg[anum].arg_ptr; |
| 507 | maxarg = anum = 1; |
| 508 | goto re_eval; |
| 509 | } |
| 510 | else { |
| 511 | if (assigning) { |
| 512 | str_sset(str, sarg[1]); |
| 513 | STABSET(str); |
| 514 | } |
| 515 | else |
| 516 | str = sarg[1]; |
| 517 | break; |
| 518 | } |
| 519 | case O_OR: |
| 520 | if (str_true(sarg[1])) { |
| 521 | if (assigning) { |
| 522 | str_sset(str, sarg[1]); |
| 523 | STABSET(str); |
| 524 | } |
| 525 | else |
| 526 | str = sarg[1]; |
| 527 | break; |
| 528 | } |
| 529 | else { |
| 530 | anum = 2; |
| 531 | optype = O_ITEM2; |
| 532 | argflags = arg[anum].arg_flags; |
| 533 | argtype = arg[anum].arg_type; |
| 534 | argptr = arg[anum].arg_ptr; |
| 535 | maxarg = anum = 1; |
| 536 | goto re_eval; |
| 537 | } |
| 538 | case O_COND_EXPR: |
| 539 | anum = (str_true(sarg[1]) ? 2 : 3); |
| 540 | optype = (anum == 2 ? O_ITEM2 : O_ITEM3); |
| 541 | argflags = arg[anum].arg_flags; |
| 542 | argtype = arg[anum].arg_type; |
| 543 | argptr = arg[anum].arg_ptr; |
| 544 | maxarg = anum = 1; |
| 545 | goto re_eval; |
| 546 | case O_COMMA: |
| 547 | str = sarg[2]; |
| 548 | break; |
| 549 | case O_NEGATE: |
| 550 | value = -str_gnum(sarg[1]); |
| 551 | goto donumset; |
| 552 | case O_NOT: |
| 553 | value = (double) !str_true(sarg[1]); |
| 554 | goto donumset; |
| 555 | case O_COMPLEMENT: |
| 556 | value = (double) ~(long)str_gnum(sarg[1]); |
| 557 | goto donumset; |
| 558 | case O_SELECT: |
| 559 | if (arg[1].arg_type == A_LVAL) |
| 560 | defoutstab = arg[1].arg_ptr.arg_stab; |
| 561 | else |
| 562 | defoutstab = stabent(str_get(sarg[1]),TRUE); |
| 563 | if (!defoutstab->stab_io) |
| 564 | defoutstab->stab_io = stio_new(); |
| 565 | curoutstab = defoutstab; |
| 566 | str_set(str,curoutstab->stab_io->fp ? Yes : No); |
| 567 | STABSET(str); |
| 568 | break; |
| 569 | case O_WRITE: |
| 570 | if (maxarg == 0) |
| 571 | stab = defoutstab; |
| 572 | else if (arg[1].arg_type == A_LVAL) |
| 573 | stab = arg[1].arg_ptr.arg_stab; |
| 574 | else |
| 575 | stab = stabent(str_get(sarg[1]),TRUE); |
| 576 | if (!stab->stab_io) { |
| 577 | str_set(str, No); |
| 578 | STABSET(str); |
| 579 | break; |
| 580 | } |
| 581 | curoutstab = stab; |
| 582 | fp = stab->stab_io->fp; |
| 583 | debarg = arg; |
| 584 | if (stab->stab_io->fmt_stab) |
| 585 | form = stab->stab_io->fmt_stab->stab_form; |
| 586 | else |
| 587 | form = stab->stab_form; |
| 588 | if (!form || !fp) { |
| 589 | str_set(str, No); |
| 590 | STABSET(str); |
| 591 | break; |
| 592 | } |
| 593 | format(&outrec,form); |
| 594 | do_write(&outrec,stab->stab_io); |
| 595 | if (stab->stab_io->flags & IOF_FLUSH) |
| 596 | fflush(fp); |
| 597 | str_set(str, Yes); |
| 598 | STABSET(str); |
| 599 | break; |
| 600 | case O_OPEN: |
| 601 | if (arg[1].arg_type == A_WORD) |
| 602 | stab = arg[1].arg_ptr.arg_stab; |
| 603 | else |
| 604 | stab = stabent(str_get(sarg[1]),TRUE); |
| 605 | if (do_open(stab,str_get(sarg[2]))) { |
| 606 | value = (double)forkprocess; |
| 607 | stab->stab_io->lines = 0; |
| 608 | goto donumset; |
| 609 | } |
| 610 | else |
| 611 | str_set(str, No); |
| 612 | STABSET(str); |
| 613 | break; |
| 614 | case O_TRANS: |
| 615 | value = (double) do_trans(str,arg); |
| 616 | str = arg->arg_ptr.arg_str; |
| 617 | goto donumset; |
| 618 | case O_NTRANS: |
| 619 | str_set(arg->arg_ptr.arg_str, do_trans(str,arg) == 0 ? Yes : No); |
| 620 | str = arg->arg_ptr.arg_str; |
| 621 | break; |
| 622 | case O_CLOSE: |
| 623 | if (arg[1].arg_type == A_WORD) |
| 624 | stab = arg[1].arg_ptr.arg_stab; |
| 625 | else |
| 626 | stab = stabent(str_get(sarg[1]),TRUE); |
| 627 | str_set(str, do_close(stab,TRUE) ? Yes : No ); |
| 628 | STABSET(str); |
| 629 | break; |
| 630 | case O_EACH: |
| 631 | str_sset(str,do_each(arg[1].arg_ptr.arg_stab->stab_hash, |
| 632 | retary,sarg,&maxsarg,sargoff,cushion)); |
| 633 | if (retary) { |
| 634 | sarg = *retary; /* they realloc it */ |
| 635 | goto array_return; |
| 636 | } |
| 637 | STABSET(str); |
| 638 | break; |
| 639 | case O_VALUES: |
| 640 | case O_KEYS: |
| 641 | value = (double) do_kv(arg[1].arg_ptr.arg_stab->stab_hash, optype, |
| 642 | retary,sarg,&maxsarg,sargoff,cushion); |
| 643 | if (retary) { |
| 644 | sarg = *retary; /* they realloc it */ |
| 645 | goto array_return; |
| 646 | } |
| 647 | goto donumset; |
| 648 | case O_ARRAY: |
| 649 | if (maxarg == 1) { |
| 650 | ary = arg[1].arg_ptr.arg_stab->stab_array; |
| 651 | maxarg = ary->ary_fill; |
| 652 | maxsarg = maxarg + sargoff; |
| 653 | if (retary) { /* array wanted */ |
| 654 | sarg = (STR **)saferealloc((char*)(sarg-sargoff), |
| 655 | (maxsarg+3+cushion)*sizeof(STR*)) + sargoff; |
| 656 | for (anum = 0; anum <= maxarg; anum++) { |
| 657 | sarg[anum+1] = str = afetch(ary,anum); |
| 658 | } |
| 659 | maxarg++; |
| 660 | maxsarg++; |
| 661 | goto array_return; |
| 662 | } |
| 663 | else |
| 664 | str = afetch(ary,maxarg); |
| 665 | } |
| 666 | else |
| 667 | str = afetch(arg[2].arg_ptr.arg_stab->stab_array, |
| 668 | ((int)str_gnum(sarg[1])) - arybase); |
| 669 | if (!str) |
| 670 | str = &str_no; |
| 671 | break; |
| 672 | case O_DELETE: |
| 673 | tmpstab = arg[2].arg_ptr.arg_stab; /* XXX */ |
| 674 | str = hdelete(tmpstab->stab_hash,str_get(sarg[1])); |
| 675 | if (!str) |
| 676 | str = &str_no; |
| 677 | break; |
| 678 | case O_HASH: |
| 679 | tmpstab = arg[2].arg_ptr.arg_stab; /* XXX */ |
| 680 | str = hfetch(tmpstab->stab_hash,str_get(sarg[1])); |
| 681 | if (!str) |
| 682 | str = &str_no; |
| 683 | break; |
| 684 | case O_LARRAY: |
| 685 | anum = ((int)str_gnum(sarg[1])) - arybase; |
| 686 | str = afetch(arg[2].arg_ptr.arg_stab->stab_array,anum); |
| 687 | if (!str || str == &str_no) { |
| 688 | str = str_new(0); |
| 689 | astore(arg[2].arg_ptr.arg_stab->stab_array,anum,str); |
| 690 | } |
| 691 | break; |
| 692 | case O_LHASH: |
| 693 | tmpstab = arg[2].arg_ptr.arg_stab; |
| 694 | str = hfetch(tmpstab->stab_hash,str_get(sarg[1])); |
| 695 | if (!str) { |
| 696 | str = str_new(0); |
| 697 | hstore(tmpstab->stab_hash,str_get(sarg[1]),str); |
| 698 | } |
| 699 | if (tmpstab == envstab) { /* heavy wizardry going on here */ |
| 700 | str->str_link.str_magic = tmpstab;/* str is now magic */ |
| 701 | envname = savestr(str_get(sarg[1])); |
| 702 | /* he threw the brick up into the air */ |
| 703 | } |
| 704 | else if (tmpstab == sigstab) { /* same thing, only different */ |
| 705 | str->str_link.str_magic = tmpstab; |
| 706 | signame = savestr(str_get(sarg[1])); |
| 707 | } |
| 708 | break; |
| 709 | case O_PUSH: |
| 710 | if (arg[1].arg_flags & AF_SPECIAL) |
| 711 | str = do_push(arg,arg[2].arg_ptr.arg_stab->stab_array); |
| 712 | else { |
| 713 | str = str_new(0); /* must copy the STR */ |
| 714 | str_sset(str,sarg[1]); |
| 715 | apush(arg[2].arg_ptr.arg_stab->stab_array,str); |
| 716 | } |
| 717 | break; |
| 718 | case O_POP: |
| 719 | str = apop(arg[1].arg_ptr.arg_stab->stab_array); |
| 720 | if (!str) { |
| 721 | str = &str_no; |
| 722 | break; |
| 723 | } |
| 724 | #ifdef STRUCTCOPY |
| 725 | *(arg->arg_ptr.arg_str) = *str; |
| 726 | #else |
| 727 | bcopy((char*)str, (char*)arg->arg_ptr.arg_str, sizeof *str); |
| 728 | #endif |
| 729 | safefree((char*)str); |
| 730 | str = arg->arg_ptr.arg_str; |
| 731 | break; |
| 732 | case O_SHIFT: |
| 733 | str = ashift(arg[1].arg_ptr.arg_stab->stab_array); |
| 734 | if (!str) { |
| 735 | str = &str_no; |
| 736 | break; |
| 737 | } |
| 738 | #ifdef STRUCTCOPY |
| 739 | *(arg->arg_ptr.arg_str) = *str; |
| 740 | #else |
| 741 | bcopy((char*)str, (char*)arg->arg_ptr.arg_str, sizeof *str); |
| 742 | #endif |
| 743 | safefree((char*)str); |
| 744 | str = arg->arg_ptr.arg_str; |
| 745 | break; |
| 746 | case O_SPLIT: |
| 747 | value = (double) do_split(arg[2].arg_ptr.arg_spat, |
| 748 | retary,sarg,&maxsarg,sargoff,cushion); |
| 749 | if (retary) { |
| 750 | sarg = *retary; /* they realloc it */ |
| 751 | goto array_return; |
| 752 | } |
| 753 | goto donumset; |
| 754 | case O_LENGTH: |
| 755 | value = (double) str_len(sarg[1]); |
| 756 | goto donumset; |
| 757 | case O_SPRINTF: |
| 758 | sarg[maxsarg+1] = Nullstr; |
| 759 | do_sprintf(str,arg->arg_len,sarg); |
| 760 | break; |
| 761 | case O_SUBSTR: |
| 762 | anum = ((int)str_gnum(sarg[2])) - arybase; |
| 763 | for (tmps = str_get(sarg[1]); *tmps && anum > 0; tmps++,anum--) ; |
| 764 | anum = (int)str_gnum(sarg[3]); |
| 765 | if (anum >= 0 && strlen(tmps) > anum) |
| 766 | str_nset(str, tmps, anum); |
| 767 | else |
| 768 | str_set(str, tmps); |
| 769 | break; |
| 770 | case O_JOIN: |
| 771 | if (arg[2].arg_flags & AF_SPECIAL && arg[2].arg_type == A_EXPR) |
| 772 | do_join(arg,str_get(sarg[1]),str); |
| 773 | else |
| 774 | ajoin(arg[2].arg_ptr.arg_stab->stab_array,str_get(sarg[1]),str); |
| 775 | break; |
| 776 | case O_SLT: |
| 777 | tmps = str_get(sarg[1]); |
| 778 | value = (double) strLT(tmps,str_get(sarg[2])); |
| 779 | goto donumset; |
| 780 | case O_SGT: |
| 781 | tmps = str_get(sarg[1]); |
| 782 | value = (double) strGT(tmps,str_get(sarg[2])); |
| 783 | goto donumset; |
| 784 | case O_SLE: |
| 785 | tmps = str_get(sarg[1]); |
| 786 | value = (double) strLE(tmps,str_get(sarg[2])); |
| 787 | goto donumset; |
| 788 | case O_SGE: |
| 789 | tmps = str_get(sarg[1]); |
| 790 | value = (double) strGE(tmps,str_get(sarg[2])); |
| 791 | goto donumset; |
| 792 | case O_SEQ: |
| 793 | tmps = str_get(sarg[1]); |
| 794 | value = (double) strEQ(tmps,str_get(sarg[2])); |
| 795 | goto donumset; |
| 796 | case O_SNE: |
| 797 | tmps = str_get(sarg[1]); |
| 798 | value = (double) strNE(tmps,str_get(sarg[2])); |
| 799 | goto donumset; |
| 800 | case O_SUBR: |
| 801 | str_sset(str,do_subr(arg,sarg)); |
| 802 | STABSET(str); |
| 803 | break; |
| 804 | case O_SORT: |
| 805 | if (maxarg <= 1) |
| 806 | stab = defoutstab; |
| 807 | else { |
| 808 | if (arg[2].arg_type == A_WORD) |
| 809 | stab = arg[2].arg_ptr.arg_stab; |
| 810 | else |
| 811 | stab = stabent(str_get(sarg[2]),TRUE); |
| 812 | if (!stab) |
| 813 | stab = defoutstab; |
| 814 | } |
| 815 | value = (double)do_sort(arg,stab, |
| 816 | retary,sarg,&maxsarg,sargoff,cushion); |
| 817 | if (retary) { |
| 818 | sarg = *retary; /* they realloc it */ |
| 819 | goto array_return; |
| 820 | } |
| 821 | goto donumset; |
| 822 | case O_PRTF: |
| 823 | case O_PRINT: |
| 824 | if (maxarg <= 1) |
| 825 | stab = defoutstab; |
| 826 | else { |
| 827 | if (arg[2].arg_type == A_WORD) |
| 828 | stab = arg[2].arg_ptr.arg_stab; |
| 829 | else |
| 830 | stab = stabent(str_get(sarg[2]),TRUE); |
| 831 | if (!stab) |
| 832 | stab = defoutstab; |
| 833 | } |
| 834 | if (!stab->stab_io || !(fp = stab->stab_io->fp)) |
| 835 | value = 0.0; |
| 836 | else { |
| 837 | if (arg[1].arg_flags & AF_SPECIAL) |
| 838 | value = (double)do_aprint(arg,fp); |
| 839 | else { |
| 840 | value = (double)do_print(sarg[1],fp); |
| 841 | if (ors && optype == O_PRINT) |
| 842 | fputs(ors, fp); |
| 843 | } |
| 844 | if (stab->stab_io->flags & IOF_FLUSH) |
| 845 | fflush(fp); |
| 846 | } |
| 847 | goto donumset; |
| 848 | case O_CHDIR: |
| 849 | tmps = str_get(sarg[1]); |
| 850 | if (!tmps || !*tmps) |
| 851 | tmps = getenv("HOME"); |
| 852 | if (!tmps || !*tmps) |
| 853 | tmps = getenv("LOGDIR"); |
| 854 | value = (double)(chdir(tmps) >= 0); |
| 855 | goto donumset; |
| 856 | case O_DIE: |
| 857 | tmps = str_get(sarg[1]); |
| 858 | if (!tmps || !*tmps) |
| 859 | exit(1); |
| 860 | fatal("%s",str_get(sarg[1])); |
| 861 | value = 0.0; |
| 862 | goto donumset; |
| 863 | case O_EXIT: |
| 864 | exit((int)str_gnum(sarg[1])); |
| 865 | value = 0.0; |
| 866 | goto donumset; |
| 867 | case O_RESET: |
| 868 | str_reset(str_get(sarg[1])); |
| 869 | value = 1.0; |
| 870 | goto donumset; |
| 871 | case O_LIST: |
| 872 | if (arg->arg_flags & AF_LOCAL) |
| 873 | savelist(sarg,maxsarg); |
| 874 | if (maxarg > 0) |
| 875 | str = sarg[maxsarg]; /* unwanted list, return last item */ |
| 876 | else |
| 877 | str = &str_no; |
| 878 | if (retary) |
| 879 | goto array_return; |
| 880 | break; |
| 881 | case O_EOF: |
| 882 | if (maxarg <= 0) |
| 883 | stab = last_in_stab; |
| 884 | else if (arg[1].arg_type == A_WORD) |
| 885 | stab = arg[1].arg_ptr.arg_stab; |
| 886 | else |
| 887 | stab = stabent(str_get(sarg[1]),TRUE); |
| 888 | str_set(str, do_eof(stab) ? Yes : No); |
| 889 | STABSET(str); |
| 890 | break; |
| 891 | case O_TELL: |
| 892 | if (maxarg <= 0) |
| 893 | stab = last_in_stab; |
| 894 | else if (arg[1].arg_type == A_WORD) |
| 895 | stab = arg[1].arg_ptr.arg_stab; |
| 896 | else |
| 897 | stab = stabent(str_get(sarg[1]),TRUE); |
| 898 | value = (double)do_tell(stab); |
| 899 | goto donumset; |
| 900 | case O_SEEK: |
| 901 | if (arg[1].arg_type == A_WORD) |
| 902 | stab = arg[1].arg_ptr.arg_stab; |
| 903 | else |
| 904 | stab = stabent(str_get(sarg[1]),TRUE); |
| 905 | value = str_gnum(sarg[2]); |
| 906 | str_set(str, do_seek(stab, |
| 907 | (long)value, (int)str_gnum(sarg[3]) ) ? Yes : No); |
| 908 | STABSET(str); |
| 909 | break; |
| 910 | case O_REDO: |
| 911 | case O_NEXT: |
| 912 | case O_LAST: |
| 913 | if (maxarg > 0) { |
| 914 | tmps = str_get(sarg[1]); |
| 915 | while (loop_ptr >= 0 && (!loop_stack[loop_ptr].loop_label || |
| 916 | strNE(tmps,loop_stack[loop_ptr].loop_label) )) { |
| 917 | #ifdef DEBUGGING |
| 918 | if (debug & 4) { |
| 919 | deb("(Skipping label #%d %s)\n",loop_ptr, |
| 920 | loop_stack[loop_ptr].loop_label); |
| 921 | } |
| 922 | #endif |
| 923 | loop_ptr--; |
| 924 | } |
| 925 | #ifdef DEBUGGING |
| 926 | if (debug & 4) { |
| 927 | deb("(Found label #%d %s)\n",loop_ptr, |
| 928 | loop_stack[loop_ptr].loop_label); |
| 929 | } |
| 930 | #endif |
| 931 | } |
| 932 | if (loop_ptr < 0) |
| 933 | fatal("Bad label: %s", maxarg > 0 ? tmps : "<null>"); |
| 934 | longjmp(loop_stack[loop_ptr].loop_env, optype); |
| 935 | case O_GOTO:/* shudder */ |
| 936 | goto_targ = str_get(sarg[1]); |
| 937 | longjmp(top_env, 1); |
| 938 | case O_INDEX: |
| 939 | tmps = str_get(sarg[1]); |
| 940 | if (!(tmps2 = fbminstr(tmps, tmps + sarg[1]->str_cur, sarg[2]))) |
| 941 | value = (double)(-1 + arybase); |
| 942 | else |
| 943 | value = (double)(tmps2 - tmps + arybase); |
| 944 | goto donumset; |
| 945 | case O_TIME: |
| 946 | value = (double) time(Null(long*)); |
| 947 | goto donumset; |
| 948 | case O_TMS: |
| 949 | value = (double) do_tms(retary,sarg,&maxsarg,sargoff,cushion); |
| 950 | if (retary) { |
| 951 | sarg = *retary; /* they realloc it */ |
| 952 | goto array_return; |
| 953 | } |
| 954 | goto donumset; |
| 955 | case O_LOCALTIME: |
| 956 | when = (long)str_gnum(sarg[1]); |
| 957 | value = (double)do_time(localtime(&when), |
| 958 | retary,sarg,&maxsarg,sargoff,cushion); |
| 959 | if (retary) { |
| 960 | sarg = *retary; /* they realloc it */ |
| 961 | goto array_return; |
| 962 | } |
| 963 | goto donumset; |
| 964 | case O_GMTIME: |
| 965 | when = (long)str_gnum(sarg[1]); |
| 966 | value = (double)do_time(gmtime(&when), |
| 967 | retary,sarg,&maxsarg,sargoff,cushion); |
| 968 | if (retary) { |
| 969 | sarg = *retary; /* they realloc it */ |
| 970 | goto array_return; |
| 971 | } |
| 972 | goto donumset; |
| 973 | case O_STAT: |
| 974 | value = (double) do_stat(arg, |
| 975 | retary,sarg,&maxsarg,sargoff,cushion); |
| 976 | if (retary) { |
| 977 | sarg = *retary; /* they realloc it */ |
| 978 | goto array_return; |
| 979 | } |
| 980 | goto donumset; |
| 981 | case O_CRYPT: |
| 982 | #ifdef CRYPT |
| 983 | tmps = str_get(sarg[1]); |
| 984 | str_set(str,crypt(tmps,str_get(sarg[2]))); |
| 985 | #else |
| 986 | fatal( |
| 987 | "The crypt() function is unimplemented due to excessive paranoia."); |
| 988 | #endif |
| 989 | break; |
| 990 | case O_EXP: |
| 991 | value = exp(str_gnum(sarg[1])); |
| 992 | goto donumset; |
| 993 | case O_LOG: |
| 994 | value = log(str_gnum(sarg[1])); |
| 995 | goto donumset; |
| 996 | case O_SQRT: |
| 997 | value = sqrt(str_gnum(sarg[1])); |
| 998 | goto donumset; |
| 999 | case O_INT: |
| 1000 | value = str_gnum(sarg[1]); |
| 1001 | if (value >= 0.0) |
| 1002 | modf(value,&value); |
| 1003 | else { |
| 1004 | modf(-value,&value); |
| 1005 | value = -value; |
| 1006 | } |
| 1007 | goto donumset; |
| 1008 | case O_ORD: |
| 1009 | value = (double) *str_get(sarg[1]); |
| 1010 | goto donumset; |
| 1011 | case O_SLEEP: |
| 1012 | tmps = str_get(sarg[1]); |
| 1013 | time(&when); |
| 1014 | if (!tmps || !*tmps) |
| 1015 | sleep((32767<<16)+32767); |
| 1016 | else |
| 1017 | sleep((unsigned)atoi(tmps)); |
| 1018 | value = (double)when; |
| 1019 | time(&when); |
| 1020 | value = ((double)when) - value; |
| 1021 | goto donumset; |
| 1022 | case O_FLIP: |
| 1023 | if (str_true(sarg[1])) { |
| 1024 | str_numset(str,0.0); |
| 1025 | anum = 2; |
| 1026 | arg->arg_type = optype = O_FLOP; |
| 1027 | arg[2].arg_flags &= ~AF_SPECIAL; |
| 1028 | arg[1].arg_flags |= AF_SPECIAL; |
| 1029 | argflags = arg[2].arg_flags; |
| 1030 | argtype = arg[2].arg_type; |
| 1031 | argptr = arg[2].arg_ptr; |
| 1032 | goto re_eval; |
| 1033 | } |
| 1034 | str_set(str,""); |
| 1035 | break; |
| 1036 | case O_FLOP: |
| 1037 | str_inc(str); |
| 1038 | if (str_true(sarg[2])) { |
| 1039 | arg->arg_type = O_FLIP; |
| 1040 | arg[1].arg_flags &= ~AF_SPECIAL; |
| 1041 | arg[2].arg_flags |= AF_SPECIAL; |
| 1042 | str_cat(str,"E0"); |
| 1043 | } |
| 1044 | break; |
| 1045 | case O_FORK: |
| 1046 | value = (double)fork(); |
| 1047 | goto donumset; |
| 1048 | case O_WAIT: |
| 1049 | ihand = signal(SIGINT, SIG_IGN); |
| 1050 | qhand = signal(SIGQUIT, SIG_IGN); |
| 1051 | value = (double)wait(&argflags); |
| 1052 | signal(SIGINT, ihand); |
| 1053 | signal(SIGQUIT, qhand); |
| 1054 | statusvalue = (unsigned short)argflags; |
| 1055 | goto donumset; |
| 1056 | case O_SYSTEM: |
| 1057 | while ((anum = vfork()) == -1) { |
| 1058 | if (errno != EAGAIN) { |
| 1059 | value = -1.0; |
| 1060 | goto donumset; |
| 1061 | } |
| 1062 | sleep(5); |
| 1063 | } |
| 1064 | if (anum > 0) { |
| 1065 | ihand = signal(SIGINT, SIG_IGN); |
| 1066 | qhand = signal(SIGQUIT, SIG_IGN); |
| 1067 | while ((argtype = wait(&argflags)) != anum && argtype != -1) |
| 1068 | ; |
| 1069 | signal(SIGINT, ihand); |
| 1070 | signal(SIGQUIT, qhand); |
| 1071 | statusvalue = (unsigned short)argflags; |
| 1072 | if (argtype == -1) |
| 1073 | value = -1.0; |
| 1074 | else { |
| 1075 | value = (double)((unsigned int)argflags & 0xffff); |
| 1076 | } |
| 1077 | goto donumset; |
| 1078 | } |
| 1079 | if (arg[1].arg_flags & AF_SPECIAL) |
| 1080 | value = (double)do_aexec(arg); |
| 1081 | else { |
| 1082 | value = (double)do_exec(str_static(sarg[1])); |
| 1083 | } |
| 1084 | _exit(-1); |
| 1085 | case O_EXEC: |
| 1086 | if (arg[1].arg_flags & AF_SPECIAL) |
| 1087 | value = (double)do_aexec(arg); |
| 1088 | else { |
| 1089 | value = (double)do_exec(str_static(sarg[1])); |
| 1090 | } |
| 1091 | goto donumset; |
| 1092 | case O_HEX: |
| 1093 | argtype = 4; |
| 1094 | goto snarfnum; |
| 1095 | |
| 1096 | case O_OCT: |
| 1097 | argtype = 3; |
| 1098 | |
| 1099 | snarfnum: |
| 1100 | anum = 0; |
| 1101 | tmps = str_get(sarg[1]); |
| 1102 | for (;;) { |
| 1103 | switch (*tmps) { |
| 1104 | default: |
| 1105 | goto out; |
| 1106 | case '8': case '9': |
| 1107 | if (argtype != 4) |
| 1108 | goto out; |
| 1109 | /* FALL THROUGH */ |
| 1110 | case '0': case '1': case '2': case '3': case '4': |
| 1111 | case '5': case '6': case '7': |
| 1112 | anum <<= argtype; |
| 1113 | anum += *tmps++ & 15; |
| 1114 | break; |
| 1115 | case 'a': case 'b': case 'c': case 'd': case 'e': case 'f': |
| 1116 | case 'A': case 'B': case 'C': case 'D': case 'E': case 'F': |
| 1117 | if (argtype != 4) |
| 1118 | goto out; |
| 1119 | anum <<= 4; |
| 1120 | anum += (*tmps++ & 7) + 9; |
| 1121 | break; |
| 1122 | case 'x': |
| 1123 | argtype = 4; |
| 1124 | tmps++; |
| 1125 | break; |
| 1126 | } |
| 1127 | } |
| 1128 | out: |
| 1129 | value = (double)anum; |
| 1130 | goto donumset; |
| 1131 | case O_CHMOD: |
| 1132 | case O_CHOWN: |
| 1133 | case O_KILL: |
| 1134 | case O_UNLINK: |
| 1135 | case O_UTIME: |
| 1136 | if (arg[1].arg_flags & AF_SPECIAL) |
| 1137 | value = (double)apply(optype,arg,Null(STR**)); |
| 1138 | else { |
| 1139 | sarg[2] = Nullstr; |
| 1140 | value = (double)apply(optype,arg,sarg); |
| 1141 | } |
| 1142 | goto donumset; |
| 1143 | case O_UMASK: |
| 1144 | value = (double)umask((int)str_gnum(sarg[1])); |
| 1145 | goto donumset; |
| 1146 | case O_RENAME: |
| 1147 | tmps = str_get(sarg[1]); |
| 1148 | #ifdef RENAME |
| 1149 | value = (double)(rename(tmps,str_get(sarg[2])) >= 0); |
| 1150 | #else |
| 1151 | tmps2 = str_get(sarg[2]); |
| 1152 | if (euid || stat(tmps2,&statbuf) < 0 || |
| 1153 | (statbuf.st_mode & S_IFMT) != S_IFDIR ) |
| 1154 | UNLINK(tmps2); /* avoid unlinking a directory */ |
| 1155 | if (!(anum = link(tmps,tmps2))) |
| 1156 | anum = UNLINK(tmps); |
| 1157 | value = (double)(anum >= 0); |
| 1158 | #endif |
| 1159 | goto donumset; |
| 1160 | case O_LINK: |
| 1161 | tmps = str_get(sarg[1]); |
| 1162 | value = (double)(link(tmps,str_get(sarg[2])) >= 0); |
| 1163 | goto donumset; |
| 1164 | case O_UNSHIFT: |
| 1165 | ary = arg[2].arg_ptr.arg_stab->stab_array; |
| 1166 | if (arg[1].arg_flags & AF_SPECIAL) |
| 1167 | do_unshift(arg,ary); |
| 1168 | else { |
| 1169 | str = str_new(0); /* must copy the STR */ |
| 1170 | str_sset(str,sarg[1]); |
| 1171 | aunshift(ary,1); |
| 1172 | astore(ary,0,str); |
| 1173 | } |
| 1174 | value = (double)(ary->ary_fill + 1); |
| 1175 | break; |
| 1176 | case O_DOFILE: |
| 1177 | case O_EVAL: |
| 1178 | str_sset(str, |
| 1179 | do_eval(arg[1].arg_type != A_NULL ? sarg[1] : defstab->stab_val, |
| 1180 | optype) ); |
| 1181 | STABSET(str); |
| 1182 | break; |
| 1183 | |
| 1184 | case O_FTRREAD: |
| 1185 | argtype = 0; |
| 1186 | anum = S_IREAD; |
| 1187 | goto check_perm; |
| 1188 | case O_FTRWRITE: |
| 1189 | argtype = 0; |
| 1190 | anum = S_IWRITE; |
| 1191 | goto check_perm; |
| 1192 | case O_FTREXEC: |
| 1193 | argtype = 0; |
| 1194 | anum = S_IEXEC; |
| 1195 | goto check_perm; |
| 1196 | case O_FTEREAD: |
| 1197 | argtype = 1; |
| 1198 | anum = S_IREAD; |
| 1199 | goto check_perm; |
| 1200 | case O_FTEWRITE: |
| 1201 | argtype = 1; |
| 1202 | anum = S_IWRITE; |
| 1203 | goto check_perm; |
| 1204 | case O_FTEEXEC: |
| 1205 | argtype = 1; |
| 1206 | anum = S_IEXEC; |
| 1207 | check_perm: |
| 1208 | str = &str_no; |
| 1209 | if (mystat(arg,sarg[1]) < 0) |
| 1210 | break; |
| 1211 | if (cando(anum,argtype)) |
| 1212 | str = &str_yes; |
| 1213 | break; |
| 1214 | |
| 1215 | case O_FTIS: |
| 1216 | if (mystat(arg,sarg[1]) >= 0) |
| 1217 | str = &str_yes; |
| 1218 | else |
| 1219 | str = &str_no; |
| 1220 | break; |
| 1221 | case O_FTEOWNED: |
| 1222 | case O_FTROWNED: |
| 1223 | if (mystat(arg,sarg[1]) >= 0 && |
| 1224 | statbuf.st_uid == (optype == O_FTEOWNED ? euid : uid) ) |
| 1225 | str = &str_yes; |
| 1226 | else |
| 1227 | str = &str_no; |
| 1228 | break; |
| 1229 | case O_FTZERO: |
| 1230 | if (mystat(arg,sarg[1]) >= 0 && !statbuf.st_size) |
| 1231 | str = &str_yes; |
| 1232 | else |
| 1233 | str = &str_no; |
| 1234 | break; |
| 1235 | case O_FTSIZE: |
| 1236 | if (mystat(arg,sarg[1]) >= 0 && statbuf.st_size) |
| 1237 | str = &str_yes; |
| 1238 | else |
| 1239 | str = &str_no; |
| 1240 | break; |
| 1241 | |
| 1242 | case O_FTSOCK: |
| 1243 | #ifdef S_IFSOCK |
| 1244 | anum = S_IFSOCK; |
| 1245 | goto check_file_type; |
| 1246 | #else |
| 1247 | str = &str_no; |
| 1248 | break; |
| 1249 | #endif |
| 1250 | case O_FTCHR: |
| 1251 | anum = S_IFCHR; |
| 1252 | goto check_file_type; |
| 1253 | case O_FTBLK: |
| 1254 | anum = S_IFBLK; |
| 1255 | goto check_file_type; |
| 1256 | case O_FTFILE: |
| 1257 | anum = S_IFREG; |
| 1258 | goto check_file_type; |
| 1259 | case O_FTDIR: |
| 1260 | anum = S_IFDIR; |
| 1261 | check_file_type: |
| 1262 | if (mystat(arg,sarg[1]) >= 0 && |
| 1263 | (statbuf.st_mode & S_IFMT) == anum ) |
| 1264 | str = &str_yes; |
| 1265 | else |
| 1266 | str = &str_no; |
| 1267 | break; |
| 1268 | case O_FTPIPE: |
| 1269 | #ifdef S_IFIFO |
| 1270 | anum = S_IFIFO; |
| 1271 | goto check_file_type; |
| 1272 | #else |
| 1273 | str = &str_no; |
| 1274 | break; |
| 1275 | #endif |
| 1276 | case O_FTLINK: |
| 1277 | #ifdef S_IFLNK |
| 1278 | if (lstat(str_get(sarg[1]),&statbuf) >= 0 && |
| 1279 | (statbuf.st_mode & S_IFMT) == S_IFLNK ) |
| 1280 | str = &str_yes; |
| 1281 | else |
| 1282 | #endif |
| 1283 | str = &str_no; |
| 1284 | break; |
| 1285 | case O_SYMLINK: |
| 1286 | #ifdef SYMLINK |
| 1287 | tmps = str_get(sarg[1]); |
| 1288 | value = (double)(symlink(tmps,str_get(sarg[2])) >= 0); |
| 1289 | goto donumset; |
| 1290 | #else |
| 1291 | fatal("Unsupported function symlink()"); |
| 1292 | #endif |
| 1293 | case O_FTSUID: |
| 1294 | anum = S_ISUID; |
| 1295 | goto check_xid; |
| 1296 | case O_FTSGID: |
| 1297 | anum = S_ISGID; |
| 1298 | goto check_xid; |
| 1299 | case O_FTSVTX: |
| 1300 | anum = S_ISVTX; |
| 1301 | check_xid: |
| 1302 | if (mystat(arg,sarg[1]) >= 0 && statbuf.st_mode & anum) |
| 1303 | str = &str_yes; |
| 1304 | else |
| 1305 | str = &str_no; |
| 1306 | break; |
| 1307 | case O_FTTTY: |
| 1308 | if (arg[1].arg_flags & AF_SPECIAL) { |
| 1309 | stab = arg[1].arg_ptr.arg_stab; |
| 1310 | tmps = ""; |
| 1311 | } |
| 1312 | else |
| 1313 | stab = stabent(tmps = str_get(sarg[1]),FALSE); |
| 1314 | if (stab && stab->stab_io && stab->stab_io->fp) |
| 1315 | anum = fileno(stab->stab_io->fp); |
| 1316 | else if (isdigit(*tmps)) |
| 1317 | anum = atoi(tmps); |
| 1318 | else |
| 1319 | anum = -1; |
| 1320 | if (isatty(anum)) |
| 1321 | str = &str_yes; |
| 1322 | else |
| 1323 | str = &str_no; |
| 1324 | break; |
| 1325 | case O_FTTEXT: |
| 1326 | case O_FTBINARY: |
| 1327 | str = do_fttext(arg,sarg[1]); |
| 1328 | break; |
| 1329 | } |
| 1330 | if (retary) { |
| 1331 | sarg[1] = str; |
| 1332 | maxsarg = sargoff + 1; |
| 1333 | } |
| 1334 | #ifdef DEBUGGING |
| 1335 | if (debug) { |
| 1336 | dlevel--; |
| 1337 | if (debug & 8) |
| 1338 | deb("%s RETURNS \"%s\"\n",opname[optype],str_get(str)); |
| 1339 | } |
| 1340 | #endif |
| 1341 | goto freeargs; |
| 1342 | |
| 1343 | array_return: |
| 1344 | #ifdef DEBUGGING |
| 1345 | if (debug) { |
| 1346 | dlevel--; |
| 1347 | if (debug & 8) |
| 1348 | deb("%s RETURNS ARRAY OF %d ARGS\n",opname[optype],maxsarg-sargoff); |
| 1349 | } |
| 1350 | #endif |
| 1351 | goto freeargs; |
| 1352 | |
| 1353 | donumset: |
| 1354 | str_numset(str,value); |
| 1355 | STABSET(str); |
| 1356 | if (retary) { |
| 1357 | sarg[1] = str; |
| 1358 | maxsarg = sargoff + 1; |
| 1359 | } |
| 1360 | #ifdef DEBUGGING |
| 1361 | if (debug) { |
| 1362 | dlevel--; |
| 1363 | if (debug & 8) |
| 1364 | deb("%s RETURNS \"%f\"\n",opname[optype],value); |
| 1365 | } |
| 1366 | #endif |
| 1367 | |
| 1368 | freeargs: |
| 1369 | sarg -= sargoff; |
| 1370 | if (sarg != quicksarg) { |
| 1371 | if (retary) { |
| 1372 | sarg[0] = &str_args; |
| 1373 | str_numset(sarg[0], (double)(maxsarg)); |
| 1374 | sarg[maxsarg+1] = Nullstr; |
| 1375 | *retary = sarg; /* up to them to free it */ |
| 1376 | } |
| 1377 | else |
| 1378 | safefree((char*)sarg); |
| 1379 | } |
| 1380 | return str; |
| 1381 | } |
| 1382 | |
| 1383 | int |
| 1384 | ingroup(gid,effective) |
| 1385 | int gid; |
| 1386 | int effective; |
| 1387 | { |
| 1388 | if (gid == (effective ? getegid() : getgid())) |
| 1389 | return TRUE; |
| 1390 | #ifdef GETGROUPS |
| 1391 | #ifndef NGROUPS |
| 1392 | #define NGROUPS 32 |
| 1393 | #endif |
| 1394 | { |
| 1395 | GIDTYPE gary[NGROUPS]; |
| 1396 | int anum; |
| 1397 | |
| 1398 | anum = getgroups(NGROUPS,gary); |
| 1399 | while (--anum >= 0) |
| 1400 | if (gary[anum] == gid) |
| 1401 | return TRUE; |
| 1402 | } |
| 1403 | #endif |
| 1404 | return FALSE; |
| 1405 | } |
| 1406 | |
| 1407 | /* Do the permissions allow some operation? Assumes statbuf already set. */ |
| 1408 | |
| 1409 | int |
| 1410 | cando(bit, effective) |
| 1411 | int bit; |
| 1412 | int effective; |
| 1413 | { |
| 1414 | if ((effective ? euid : uid) == 0) { /* root is special */ |
| 1415 | if (bit == S_IEXEC) { |
| 1416 | if (statbuf.st_mode & 0111 || |
| 1417 | (statbuf.st_mode & S_IFMT) == S_IFDIR ) |
| 1418 | return TRUE; |
| 1419 | } |
| 1420 | else |
| 1421 | return TRUE; /* root reads and writes anything */ |
| 1422 | return FALSE; |
| 1423 | } |
| 1424 | if (statbuf.st_uid == (effective ? euid : uid) ) { |
| 1425 | if (statbuf.st_mode & bit) |
| 1426 | return TRUE; /* ok as "user" */ |
| 1427 | } |
| 1428 | else if (ingroup((int)statbuf.st_gid,effective)) { |
| 1429 | if (statbuf.st_mode & bit >> 3) |
| 1430 | return TRUE; /* ok as "group" */ |
| 1431 | } |
| 1432 | else if (statbuf.st_mode & bit >> 6) |
| 1433 | return TRUE; /* ok as "other" */ |
| 1434 | return FALSE; |
| 1435 | } |
projects / p5sagit/p5-mst-13.2.git / blame