| 1 | /* $NetBSD: test.c,v 1.21 1999/04/05 09:48:38 kleink Exp $ */ |
| 2 | |
| 3 | /* |
| 4 | * test(1); version 7-like -- author Erik Baalbergen |
| 5 | * modified by Eric Gisin to be used as built-in. |
| 6 | * modified by Arnold Robbins to add SVR3 compatibility |
| 7 | * (-x -c -b -p -u -g -k) plus Korn's -L -nt -ot -ef and new -S (socket). |
| 8 | * modified by J.T. Conklin for NetBSD. |
| 9 | * |
| 10 | * This program is in the Public Domain. |
| 11 | * |
| 12 | * $FreeBSD: src/bin/test/test.c,v 1.29.2.7 2002/09/10 09:10:57 maxim Exp $ |
| 13 | * $DragonFly: src/bin/test/test.c,v 1.7 2004/11/07 19:42:16 eirikn Exp $ |
| 14 | */ |
| 15 | |
| 16 | #include <sys/types.h> |
| 17 | #include <sys/stat.h> |
| 18 | |
| 19 | #include <ctype.h> |
| 20 | #include <err.h> |
| 21 | #include <errno.h> |
| 22 | #include <limits.h> |
| 23 | #include <stdarg.h> |
| 24 | #include <stdio.h> |
| 25 | #include <stdlib.h> |
| 26 | #include <string.h> |
| 27 | #include <unistd.h> |
| 28 | |
| 29 | #ifdef SHELL |
| 30 | #define main testcmd |
| 31 | #include "bltin/bltin.h" |
| 32 | #else |
| 33 | static void error(const char *, ...) __attribute__((__noreturn__)); |
| 34 | |
| 35 | static void |
| 36 | error(const char *msg, ...) |
| 37 | { |
| 38 | va_list ap; |
| 39 | |
| 40 | va_start(ap, msg); |
| 41 | verrx(2, msg, ap); |
| 42 | /*NOTREACHED*/ |
| 43 | va_end(ap); |
| 44 | } |
| 45 | #endif |
| 46 | |
| 47 | /* test(1) accepts the following grammar: |
| 48 | oexpr ::= aexpr | aexpr "-o" oexpr ; |
| 49 | aexpr ::= nexpr | nexpr "-a" aexpr ; |
| 50 | nexpr ::= primary | "!" primary |
| 51 | primary ::= unary-operator operand |
| 52 | | operand binary-operator operand |
| 53 | | operand |
| 54 | | "(" oexpr ")" |
| 55 | ; |
| 56 | unary-operator ::= "-r"|"-w"|"-x"|"-f"|"-d"|"-c"|"-b"|"-p"| |
| 57 | "-u"|"-g"|"-k"|"-s"|"-t"|"-z"|"-n"|"-o"|"-O"|"-G"|"-L"|"-S"; |
| 58 | |
| 59 | binary-operator ::= "="|"!="|"-eq"|"-ne"|"-ge"|"-gt"|"-le"|"-lt"| |
| 60 | "-nt"|"-ot"|"-ef"; |
| 61 | operand ::= <any legal UNIX file name> |
| 62 | */ |
| 63 | |
| 64 | enum token { |
| 65 | EOI, |
| 66 | FILRD, |
| 67 | FILWR, |
| 68 | FILEX, |
| 69 | FILEXIST, |
| 70 | FILREG, |
| 71 | FILDIR, |
| 72 | FILCDEV, |
| 73 | FILBDEV, |
| 74 | FILFIFO, |
| 75 | FILSOCK, |
| 76 | FILSYM, |
| 77 | FILGZ, |
| 78 | FILTT, |
| 79 | FILSUID, |
| 80 | FILSGID, |
| 81 | FILSTCK, |
| 82 | FILNT, |
| 83 | FILOT, |
| 84 | FILEQ, |
| 85 | FILUID, |
| 86 | FILGID, |
| 87 | STREZ, |
| 88 | STRNZ, |
| 89 | STREQ, |
| 90 | STRNE, |
| 91 | STRLT, |
| 92 | STRGT, |
| 93 | INTEQ, |
| 94 | INTNE, |
| 95 | INTGE, |
| 96 | INTGT, |
| 97 | INTLE, |
| 98 | INTLT, |
| 99 | UNOT, |
| 100 | BAND, |
| 101 | BOR, |
| 102 | LPAREN, |
| 103 | RPAREN, |
| 104 | OPERAND |
| 105 | }; |
| 106 | |
| 107 | enum token_types { |
| 108 | UNOP, |
| 109 | BINOP, |
| 110 | BUNOP, |
| 111 | BBINOP, |
| 112 | PAREN |
| 113 | }; |
| 114 | |
| 115 | struct t_op { |
| 116 | const char *op_text; |
| 117 | short op_num, op_type; |
| 118 | } const ops [] = { |
| 119 | {"-r", FILRD, UNOP}, |
| 120 | {"-w", FILWR, UNOP}, |
| 121 | {"-x", FILEX, UNOP}, |
| 122 | {"-e", FILEXIST,UNOP}, |
| 123 | {"-f", FILREG, UNOP}, |
| 124 | {"-d", FILDIR, UNOP}, |
| 125 | {"-c", FILCDEV,UNOP}, |
| 126 | {"-b", FILBDEV,UNOP}, |
| 127 | {"-p", FILFIFO,UNOP}, |
| 128 | {"-u", FILSUID,UNOP}, |
| 129 | {"-g", FILSGID,UNOP}, |
| 130 | {"-k", FILSTCK,UNOP}, |
| 131 | {"-s", FILGZ, UNOP}, |
| 132 | {"-t", FILTT, UNOP}, |
| 133 | {"-z", STREZ, UNOP}, |
| 134 | {"-n", STRNZ, UNOP}, |
| 135 | {"-h", FILSYM, UNOP}, /* for backwards compat */ |
| 136 | {"-O", FILUID, UNOP}, |
| 137 | {"-G", FILGID, UNOP}, |
| 138 | {"-L", FILSYM, UNOP}, |
| 139 | {"-S", FILSOCK,UNOP}, |
| 140 | {"=", STREQ, BINOP}, |
| 141 | {"!=", STRNE, BINOP}, |
| 142 | {"<", STRLT, BINOP}, |
| 143 | {">", STRGT, BINOP}, |
| 144 | {"-eq", INTEQ, BINOP}, |
| 145 | {"-ne", INTNE, BINOP}, |
| 146 | {"-ge", INTGE, BINOP}, |
| 147 | {"-gt", INTGT, BINOP}, |
| 148 | {"-le", INTLE, BINOP}, |
| 149 | {"-lt", INTLT, BINOP}, |
| 150 | {"-nt", FILNT, BINOP}, |
| 151 | {"-ot", FILOT, BINOP}, |
| 152 | {"-ef", FILEQ, BINOP}, |
| 153 | {"!", UNOT, BUNOP}, |
| 154 | {"-a", BAND, BBINOP}, |
| 155 | {"-o", BOR, BBINOP}, |
| 156 | {"(", LPAREN, PAREN}, |
| 157 | {")", RPAREN, PAREN}, |
| 158 | {0, 0, 0} |
| 159 | }; |
| 160 | |
| 161 | struct t_op const *t_wp_op; |
| 162 | int nargc; |
| 163 | char **t_wp; |
| 164 | |
| 165 | static int aexpr (enum token); |
| 166 | static int binop (void); |
| 167 | static int equalf (const char *, const char *); |
| 168 | static int filstat (char *, enum token); |
| 169 | static int getn (const char *); |
| 170 | static long long getll (const char *); |
| 171 | static int intcmp (const char *, const char *); |
| 172 | static int isoperand (void); |
| 173 | static int newerf (const char *, const char *); |
| 174 | static int nexpr (enum token); |
| 175 | static int oexpr (enum token); |
| 176 | static int olderf (const char *, const char *); |
| 177 | static int primary (enum token); |
| 178 | static void syntax (const char *, const char *); |
| 179 | static enum token t_lex (char *); |
| 180 | |
| 181 | int |
| 182 | main(int argc, char **argv) |
| 183 | { |
| 184 | gid_t egid, gid; |
| 185 | uid_t euid, uid; |
| 186 | int res; |
| 187 | char *p; |
| 188 | |
| 189 | if ((p = strrchr(argv[0], '/')) == NULL) |
| 190 | p = argv[0]; |
| 191 | else |
| 192 | p++; |
| 193 | if (strcmp(p, "[") == 0) { |
| 194 | if (strcmp(argv[--argc], "]") != 0) |
| 195 | error("missing ]"); |
| 196 | argv[argc] = NULL; |
| 197 | } |
| 198 | |
| 199 | /* no expression => false */ |
| 200 | if (--argc <= 0) |
| 201 | return 1; |
| 202 | |
| 203 | /* XXX work around the absence of an eaccess(2) syscall */ |
| 204 | egid = getegid(); |
| 205 | euid = geteuid(); |
| 206 | gid = getgid(); |
| 207 | uid = getuid(); |
| 208 | setregid(egid, gid); |
| 209 | setreuid(euid, uid); |
| 210 | |
| 211 | nargc = argc; |
| 212 | t_wp = &argv[1]; |
| 213 | res = !oexpr(t_lex(*t_wp)); |
| 214 | |
| 215 | if (--nargc > 0) |
| 216 | syntax(*t_wp, "unexpected operator"); |
| 217 | setregid(gid, egid); |
| 218 | setreuid(uid, euid); |
| 219 | |
| 220 | return res; |
| 221 | } |
| 222 | |
| 223 | static void |
| 224 | syntax(const char *op, const char *msg) |
| 225 | { |
| 226 | |
| 227 | if (op && *op) |
| 228 | error("%s: %s", op, msg); |
| 229 | else |
| 230 | error("%s", msg); |
| 231 | } |
| 232 | |
| 233 | static int |
| 234 | oexpr(enum token n) |
| 235 | { |
| 236 | int res; |
| 237 | |
| 238 | res = aexpr(n); |
| 239 | if (t_lex(nargc > 0 ? (--nargc, *++t_wp) : NULL) == BOR) |
| 240 | return oexpr(t_lex(nargc > 0 ? (--nargc, *++t_wp) : NULL)) || |
| 241 | res; |
| 242 | t_wp--; |
| 243 | nargc++; |
| 244 | return res; |
| 245 | } |
| 246 | |
| 247 | static int |
| 248 | aexpr(enum token n) |
| 249 | { |
| 250 | int res; |
| 251 | |
| 252 | res = nexpr(n); |
| 253 | if (t_lex(nargc > 0 ? (--nargc, *++t_wp) : NULL) == BAND) |
| 254 | return aexpr(t_lex(nargc > 0 ? (--nargc, *++t_wp) : NULL)) && |
| 255 | res; |
| 256 | t_wp--; |
| 257 | nargc++; |
| 258 | return res; |
| 259 | } |
| 260 | |
| 261 | static int |
| 262 | nexpr(enum token n) |
| 263 | { |
| 264 | if (n == UNOT) |
| 265 | return !nexpr(t_lex(nargc > 0 ? (--nargc, *++t_wp) : NULL)); |
| 266 | return primary(n); |
| 267 | } |
| 268 | |
| 269 | static int |
| 270 | primary(enum token n) |
| 271 | { |
| 272 | enum token nn; |
| 273 | int res; |
| 274 | |
| 275 | if (n == EOI) |
| 276 | return 0; /* missing expression */ |
| 277 | if (n == LPAREN) { |
| 278 | if ((nn = t_lex(nargc > 0 ? (--nargc, *++t_wp) : NULL)) == |
| 279 | RPAREN) |
| 280 | return 0; /* missing expression */ |
| 281 | res = oexpr(nn); |
| 282 | if (t_lex(nargc > 0 ? (--nargc, *++t_wp) : NULL) != RPAREN) |
| 283 | syntax(NULL, "closing paren expected"); |
| 284 | return res; |
| 285 | } |
| 286 | if (t_wp_op && t_wp_op->op_type == UNOP) { |
| 287 | /* unary expression */ |
| 288 | if (--nargc == 0) |
| 289 | syntax(t_wp_op->op_text, "argument expected"); |
| 290 | switch (n) { |
| 291 | case STREZ: |
| 292 | return strlen(*++t_wp) == 0; |
| 293 | case STRNZ: |
| 294 | return strlen(*++t_wp) != 0; |
| 295 | case FILTT: |
| 296 | return isatty(getn(*++t_wp)); |
| 297 | default: |
| 298 | return filstat(*++t_wp, n); |
| 299 | } |
| 300 | } |
| 301 | |
| 302 | if (t_lex(nargc > 0 ? t_wp[1] : NULL), t_wp_op && t_wp_op->op_type == |
| 303 | BINOP) { |
| 304 | return binop(); |
| 305 | } |
| 306 | |
| 307 | return strlen(*t_wp) > 0; |
| 308 | } |
| 309 | |
| 310 | static int |
| 311 | binop(void) |
| 312 | { |
| 313 | const char *opnd1, *opnd2; |
| 314 | struct t_op const *op; |
| 315 | |
| 316 | opnd1 = *t_wp; |
| 317 | t_lex(nargc > 0 ? (--nargc, *++t_wp) : NULL); |
| 318 | op = t_wp_op; |
| 319 | |
| 320 | if ((opnd2 = nargc > 0 ? (--nargc, *++t_wp) : NULL) == NULL) |
| 321 | syntax(op->op_text, "argument expected"); |
| 322 | |
| 323 | switch (op->op_num) { |
| 324 | case STREQ: |
| 325 | return strcmp(opnd1, opnd2) == 0; |
| 326 | case STRNE: |
| 327 | return strcmp(opnd1, opnd2) != 0; |
| 328 | case STRLT: |
| 329 | return strcmp(opnd1, opnd2) < 0; |
| 330 | case STRGT: |
| 331 | return strcmp(opnd1, opnd2) > 0; |
| 332 | case INTEQ: |
| 333 | return intcmp(opnd1, opnd2) == 0; |
| 334 | case INTNE: |
| 335 | return intcmp(opnd1, opnd2) != 0; |
| 336 | case INTGE: |
| 337 | return intcmp(opnd1, opnd2) >= 0; |
| 338 | case INTGT: |
| 339 | return intcmp(opnd1, opnd2) > 0; |
| 340 | case INTLE: |
| 341 | return intcmp(opnd1, opnd2) <= 0; |
| 342 | case INTLT: |
| 343 | return intcmp(opnd1, opnd2) < 0; |
| 344 | case FILNT: |
| 345 | return newerf (opnd1, opnd2); |
| 346 | case FILOT: |
| 347 | return olderf (opnd1, opnd2); |
| 348 | case FILEQ: |
| 349 | return equalf (opnd1, opnd2); |
| 350 | default: |
| 351 | abort(); |
| 352 | /* NOTREACHED */ |
| 353 | } |
| 354 | } |
| 355 | |
| 356 | static int |
| 357 | filstat(char *nm, enum token mode) |
| 358 | { |
| 359 | struct stat s; |
| 360 | |
| 361 | if (mode == FILSYM ? lstat(nm, &s) : stat(nm, &s)) |
| 362 | return 0; |
| 363 | |
| 364 | switch (mode) { |
| 365 | case FILRD: |
| 366 | return access(nm, R_OK) == 0; |
| 367 | case FILWR: |
| 368 | return access(nm, W_OK) == 0; |
| 369 | case FILEX: |
| 370 | /* XXX work around access(2) false positives for superuser */ |
| 371 | if (access(nm, X_OK) != 0) |
| 372 | return 0; |
| 373 | if (S_ISDIR(s.st_mode) || getuid() != 0) |
| 374 | return 1; |
| 375 | return (s.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH)) != 0; |
| 376 | case FILEXIST: |
| 377 | return access(nm, F_OK) == 0; |
| 378 | case FILREG: |
| 379 | return S_ISREG(s.st_mode); |
| 380 | case FILDIR: |
| 381 | return S_ISDIR(s.st_mode); |
| 382 | case FILCDEV: |
| 383 | return S_ISCHR(s.st_mode); |
| 384 | case FILBDEV: |
| 385 | return S_ISBLK(s.st_mode); |
| 386 | case FILFIFO: |
| 387 | return S_ISFIFO(s.st_mode); |
| 388 | case FILSOCK: |
| 389 | return S_ISSOCK(s.st_mode); |
| 390 | case FILSYM: |
| 391 | return S_ISLNK(s.st_mode); |
| 392 | case FILSUID: |
| 393 | return (s.st_mode & S_ISUID) != 0; |
| 394 | case FILSGID: |
| 395 | return (s.st_mode & S_ISGID) != 0; |
| 396 | case FILSTCK: |
| 397 | return (s.st_mode & S_ISVTX) != 0; |
| 398 | case FILGZ: |
| 399 | return s.st_size > (off_t)0; |
| 400 | case FILUID: |
| 401 | return s.st_uid == geteuid(); |
| 402 | case FILGID: |
| 403 | return s.st_gid == getegid(); |
| 404 | default: |
| 405 | return 1; |
| 406 | } |
| 407 | } |
| 408 | |
| 409 | static enum token |
| 410 | t_lex(char *s) |
| 411 | { |
| 412 | struct t_op const *op = ops; |
| 413 | |
| 414 | if (s == 0) { |
| 415 | t_wp_op = NULL; |
| 416 | return EOI; |
| 417 | } |
| 418 | while (op->op_text) { |
| 419 | if (strcmp(s, op->op_text) == 0) { |
| 420 | if ((op->op_type == UNOP && isoperand()) || |
| 421 | (op->op_num == LPAREN && nargc == 1)) |
| 422 | break; |
| 423 | t_wp_op = op; |
| 424 | return op->op_num; |
| 425 | } |
| 426 | op++; |
| 427 | } |
| 428 | t_wp_op = NULL; |
| 429 | return OPERAND; |
| 430 | } |
| 431 | |
| 432 | static int |
| 433 | isoperand(void) |
| 434 | { |
| 435 | struct t_op const *op = ops; |
| 436 | char *s; |
| 437 | char *t; |
| 438 | |
| 439 | if (nargc == 1) |
| 440 | return 1; |
| 441 | if (nargc == 2) |
| 442 | return 0; |
| 443 | s = *(t_wp + 1); |
| 444 | t = *(t_wp + 2); |
| 445 | while (op->op_text) { |
| 446 | if (strcmp(s, op->op_text) == 0) |
| 447 | return op->op_type == BINOP && |
| 448 | (t[0] != ')' || t[1] != '\0'); |
| 449 | op++; |
| 450 | } |
| 451 | return 0; |
| 452 | } |
| 453 | |
| 454 | /* atoi with error detection */ |
| 455 | static int |
| 456 | getn(const char *s) |
| 457 | { |
| 458 | char *p; |
| 459 | long r; |
| 460 | |
| 461 | errno = 0; |
| 462 | r = strtol(s, &p, 10); |
| 463 | |
| 464 | if (errno != 0) |
| 465 | error((errno == EINVAL) ? "%s: bad number" : |
| 466 | "%s: out of range", s); |
| 467 | |
| 468 | while (isspace((unsigned char)*p)) |
| 469 | p++; |
| 470 | |
| 471 | if (*p) |
| 472 | error("%s: bad number", s); |
| 473 | |
| 474 | return (int) r; |
| 475 | } |
| 476 | |
| 477 | /* atoi with error detection and 64 bit range */ |
| 478 | static long long |
| 479 | getll(const char *s) |
| 480 | { |
| 481 | char *p; |
| 482 | long long r; |
| 483 | |
| 484 | errno = 0; |
| 485 | r = strtoll(s, &p, 10); |
| 486 | |
| 487 | if (errno != 0) |
| 488 | error((errno == EINVAL) ? "%s: bad number" : |
| 489 | "%s: out of range", s); |
| 490 | |
| 491 | while (isspace((unsigned char)*p)) |
| 492 | p++; |
| 493 | |
| 494 | if (*p) |
| 495 | error("%s: bad number", s); |
| 496 | |
| 497 | return r; |
| 498 | } |
| 499 | |
| 500 | static int |
| 501 | intcmp (const char *s1, const char *s2) |
| 502 | { |
| 503 | long long q1, q2; |
| 504 | |
| 505 | |
| 506 | q1 = getll(s1); |
| 507 | q2 = getll(s2); |
| 508 | |
| 509 | if (q1 > q2) |
| 510 | return 1; |
| 511 | |
| 512 | if (q1 < q2) |
| 513 | return -1; |
| 514 | |
| 515 | return 0; |
| 516 | } |
| 517 | |
| 518 | static int |
| 519 | newerf (const char *f1, const char *f2) |
| 520 | { |
| 521 | struct stat b1, b2; |
| 522 | |
| 523 | if (stat(f1, &b1) != 0 || stat(f2, &b2) != 0) |
| 524 | return 0; |
| 525 | |
| 526 | if (b1.st_mtimespec.tv_sec > b2.st_mtimespec.tv_sec) |
| 527 | return 1; |
| 528 | if (b1.st_mtimespec.tv_sec < b2.st_mtimespec.tv_sec) |
| 529 | return 0; |
| 530 | |
| 531 | return (b1.st_mtimespec.tv_nsec > b2.st_mtimespec.tv_nsec); |
| 532 | } |
| 533 | |
| 534 | static int |
| 535 | olderf (const char *f1, const char *f2) |
| 536 | { |
| 537 | return (newerf(f2, f1)); |
| 538 | } |
| 539 | |
| 540 | static int |
| 541 | equalf (const char *f1, const char *f2) |
| 542 | { |
| 543 | struct stat b1, b2; |
| 544 | |
| 545 | return (stat (f1, &b1) == 0 && |
| 546 | stat (f2, &b2) == 0 && |
| 547 | b1.st_dev == b2.st_dev && |
| 548 | b1.st_ino == b2.st_ino); |
| 549 | } |