1 %{ 2 /*- 3 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 4 * 5 * Copyright (c) 2008 Kai Wang 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #include <sys/cdefs.h> 31 __FBSDID("$FreeBSD$"); 32 33 #include <sys/mman.h> 34 #include <sys/param.h> 35 #include <sys/queue.h> 36 #include <sys/stat.h> 37 #include <archive.h> 38 #include <archive_entry.h> 39 #include <dirent.h> 40 #include <errno.h> 41 #include <fcntl.h> 42 #include <stdio.h> 43 #include <stdlib.h> 44 #include <string.h> 45 #include <sysexits.h> 46 #include <unistd.h> 47 48 #include "ar.h" 49 50 #define TEMPLATE "arscp.XXXXXXXX" 51 52 struct list { 53 char *str; 54 struct list *next; 55 }; 56 57 58 extern int yylex(void); 59 60 static void yyerror(const char *); 61 static void arscp_addlib(char *archive, struct list *list); 62 static void arscp_addmod(struct list *list); 63 static void arscp_clear(void); 64 static int arscp_copy(int ifd, int ofd); 65 static void arscp_create(char *in, char *out); 66 static void arscp_delete(struct list *list); 67 static void arscp_dir(char *archive, struct list *list, char *rlt); 68 static void arscp_end(int eval); 69 static void arscp_extract(struct list *list); 70 static void arscp_free_argv(void); 71 static void arscp_free_mlist(struct list *list); 72 static void arscp_list(void); 73 static struct list *arscp_mlist(struct list *list, char *str); 74 static void arscp_mlist2argv(struct list *list); 75 static int arscp_mlist_len(struct list *list); 76 static void arscp_open(char *fname); 77 static void arscp_prompt(void); 78 static void arscp_replace(struct list *list); 79 static void arscp_save(void); 80 static int arscp_target_exist(void); 81 82 extern int lineno; 83 84 static struct bsdar *bsdar; 85 static char *target; 86 static char *tmpac; 87 static int interactive; 88 static int verbose; 89 90 %} 91 92 %token ADDLIB 93 %token ADDMOD 94 %token CLEAR 95 %token CREATE 96 %token DELETE 97 %token DIRECTORY 98 %token END 99 %token EXTRACT 100 %token LIST 101 %token OPEN 102 %token REPLACE 103 %token VERBOSE 104 %token SAVE 105 %token LP 106 %token RP 107 %token COMMA 108 %token EOL 109 %token <str> FNAME 110 %type <list> mod_list 111 112 %union { 113 char *str; 114 struct list *list; 115 } 116 117 %% 118 119 begin 120 : { arscp_prompt(); } ar_script 121 ; 122 123 ar_script 124 : cmd_list 125 | 126 ; 127 128 mod_list 129 : FNAME { $$ = arscp_mlist(NULL, $1); } 130 | mod_list separator FNAME { $$ = arscp_mlist($1, $3); } 131 ; 132 133 separator 134 : COMMA 135 | 136 ; 137 138 cmd_list 139 : rawcmd 140 | cmd_list rawcmd 141 ; 142 143 rawcmd 144 : cmd EOL { arscp_prompt(); } 145 ; 146 147 cmd 148 : addlib_cmd 149 | addmod_cmd 150 | clear_cmd 151 | create_cmd 152 | delete_cmd 153 | directory_cmd 154 | end_cmd 155 | extract_cmd 156 | list_cmd 157 | open_cmd 158 | replace_cmd 159 | verbose_cmd 160 | save_cmd 161 | invalid_cmd 162 | empty_cmd 163 | error 164 ; 165 166 addlib_cmd 167 : ADDLIB FNAME LP mod_list RP { arscp_addlib($2, $4); } 168 | ADDLIB FNAME { arscp_addlib($2, NULL); } 169 ; 170 171 addmod_cmd 172 : ADDMOD mod_list { arscp_addmod($2); } 173 ; 174 175 clear_cmd 176 : CLEAR { arscp_clear(); } 177 ; 178 179 create_cmd 180 : CREATE FNAME { arscp_create(NULL, $2); } 181 ; 182 183 delete_cmd 184 : DELETE mod_list { arscp_delete($2); } 185 ; 186 187 directory_cmd 188 : DIRECTORY FNAME { arscp_dir($2, NULL, NULL); } 189 | DIRECTORY FNAME LP mod_list RP { arscp_dir($2, $4, NULL); } 190 | DIRECTORY FNAME LP mod_list RP FNAME { arscp_dir($2, $4, $6); } 191 ; 192 193 end_cmd 194 : END { arscp_end(EX_OK); } 195 ; 196 197 extract_cmd 198 : EXTRACT mod_list { arscp_extract($2); } 199 ; 200 201 list_cmd 202 : LIST { arscp_list(); } 203 ; 204 205 open_cmd 206 : OPEN FNAME { arscp_open($2); } 207 ; 208 209 replace_cmd 210 : REPLACE mod_list { arscp_replace($2); } 211 ; 212 213 save_cmd 214 : SAVE { arscp_save(); } 215 ; 216 217 verbose_cmd 218 : VERBOSE { verbose = !verbose; } 219 ; 220 221 empty_cmd 222 : 223 ; 224 225 invalid_cmd 226 : FNAME { yyerror(NULL); } 227 ; 228 229 %% 230 231 /* ARGSUSED */ 232 static void 233 yyerror(const char *s) 234 { 235 236 (void) s; 237 printf("Syntax error in archive script, line %d\n", lineno); 238 } 239 240 /* 241 * arscp_open first open an archive and check its validity. If the archive 242 * format is valid, it calls arscp_create to create a temporary copy of 243 * the archive. 244 */ 245 static void 246 arscp_open(char *fname) 247 { 248 struct archive *a; 249 struct archive_entry *entry; 250 int r; 251 252 if ((a = archive_read_new()) == NULL) 253 bsdar_errc(bsdar, EX_SOFTWARE, 0, "archive_read_new failed"); 254 archive_read_support_format_ar(a); 255 AC(archive_read_open_filename(a, fname, DEF_BLKSZ)); 256 if ((r = archive_read_next_header(a, &entry))) 257 bsdar_warnc(bsdar, archive_errno(a), "%s", 258 archive_error_string(a)); 259 AC(archive_read_close(a)); 260 AC(archive_read_free(a)); 261 if (r != ARCHIVE_OK) 262 return; 263 arscp_create(fname, fname); 264 } 265 266 /* 267 * Create archive. in != NULL indicate it's a OPEN cmd, and resulting 268 * archive is based on modification of an existing one. If in == NULL, 269 * we are in CREATE cmd and a new empty archive will be created. 270 */ 271 static void 272 arscp_create(char *in, char *out) 273 { 274 struct archive *a; 275 int ifd, ofd; 276 277 /* Delete previously created temporary archive, if any. */ 278 if (tmpac) { 279 if (unlink(tmpac) < 0) 280 bsdar_errc(bsdar, EX_IOERR, errno, "unlink failed"); 281 free(tmpac); 282 } 283 284 tmpac = strdup(TEMPLATE); 285 if (tmpac == NULL) 286 bsdar_errc(bsdar, EX_SOFTWARE, errno, "strdup failed"); 287 if ((ofd = mkstemp(tmpac)) < 0) 288 bsdar_errc(bsdar, EX_IOERR, errno, "mkstemp failed"); 289 290 if (in) { 291 /* 292 * Command OPEN creates a temporary copy of the 293 * input archive. 294 */ 295 if ((ifd = open(in, O_RDONLY)) < 0) { 296 bsdar_warnc(bsdar, errno, "open failed"); 297 return; 298 } 299 if (arscp_copy(ifd, ofd)) { 300 bsdar_warnc(bsdar, 0, "arscp_copy failed"); 301 return; 302 } 303 close(ifd); 304 close(ofd); 305 } else { 306 /* 307 * Command CREATE creates an "empty" archive. 308 * (archive with only global header) 309 */ 310 if ((a = archive_write_new()) == NULL) 311 bsdar_errc(bsdar, EX_SOFTWARE, 0, 312 "archive_write_new failed"); 313 archive_write_set_format_ar_svr4(a); 314 AC(archive_write_open_fd(a, ofd)); 315 AC(archive_write_close(a)); 316 AC(archive_write_free(a)); 317 } 318 319 /* Override previous target, if any. */ 320 if (target) 321 free(target); 322 323 target = out; 324 bsdar->filename = tmpac; 325 } 326 327 /* A file copying implementation using mmap. */ 328 static int 329 arscp_copy(int ifd, int ofd) 330 { 331 struct stat sb; 332 char *buf, *p; 333 ssize_t w; 334 size_t bytes; 335 336 if (fstat(ifd, &sb) < 0) { 337 bsdar_warnc(bsdar, errno, "fstate failed"); 338 return (1); 339 } 340 if ((p = mmap(NULL, sb.st_size, PROT_READ, MAP_SHARED, ifd, 341 (off_t)0)) == MAP_FAILED) { 342 bsdar_warnc(bsdar, errno, "mmap failed"); 343 return (1); 344 } 345 for (buf = p, bytes = sb.st_size; bytes > 0; bytes -= w) { 346 w = write(ofd, buf, bytes); 347 if (w <= 0) { 348 bsdar_warnc(bsdar, errno, "write failed"); 349 break; 350 } 351 } 352 if (munmap(p, sb.st_size) < 0) 353 bsdar_errc(bsdar, EX_SOFTWARE, errno, "munmap failed"); 354 if (bytes > 0) 355 return (1); 356 357 return (0); 358 } 359 360 /* 361 * Add all modules of archive to current archive, if list != NULL, 362 * only those modules specified in 'list' will be added. 363 */ 364 static void 365 arscp_addlib(char *archive, struct list *list) 366 { 367 368 if (!arscp_target_exist()) 369 return; 370 arscp_mlist2argv(list); 371 bsdar->addlib = archive; 372 ar_mode_A(bsdar); 373 arscp_free_argv(); 374 arscp_free_mlist(list); 375 } 376 377 /* Add modules into current archive. */ 378 static void 379 arscp_addmod(struct list *list) 380 { 381 382 if (!arscp_target_exist()) 383 return; 384 arscp_mlist2argv(list); 385 ar_mode_q(bsdar); 386 arscp_free_argv(); 387 arscp_free_mlist(list); 388 } 389 390 /* Delete modules from current archive. */ 391 static void 392 arscp_delete(struct list *list) 393 { 394 395 if (!arscp_target_exist()) 396 return; 397 arscp_mlist2argv(list); 398 ar_mode_d(bsdar); 399 arscp_free_argv(); 400 arscp_free_mlist(list); 401 } 402 403 /* Extract modules from current archive. */ 404 static void 405 arscp_extract(struct list *list) 406 { 407 408 if (!arscp_target_exist()) 409 return; 410 arscp_mlist2argv(list); 411 ar_mode_x(bsdar); 412 arscp_free_argv(); 413 arscp_free_mlist(list); 414 } 415 416 /* List modules of archive. (Simple Mode) */ 417 static void 418 arscp_list(void) 419 { 420 421 if (!arscp_target_exist()) 422 return; 423 bsdar->argc = 0; 424 bsdar->argv = NULL; 425 /* Always verbose. */ 426 bsdar->options |= AR_V; 427 ar_mode_t(bsdar); 428 bsdar->options &= ~AR_V; 429 } 430 431 /* List modules of archive. (Advance Mode) */ 432 static void 433 arscp_dir(char *archive, struct list *list, char *rlt) 434 { 435 FILE *out; 436 437 /* If rlt != NULL, redirect output to it */ 438 out = NULL; 439 if (rlt) { 440 out = stdout; 441 if ((stdout = fopen(rlt, "w")) == NULL) 442 bsdar_errc(bsdar, EX_IOERR, errno, 443 "fopen %s failed", rlt); 444 } 445 446 bsdar->filename = archive; 447 if (list) 448 arscp_mlist2argv(list); 449 else { 450 bsdar->argc = 0; 451 bsdar->argv = NULL; 452 } 453 if (verbose) 454 bsdar->options |= AR_V; 455 ar_mode_t(bsdar); 456 bsdar->options &= ~AR_V; 457 458 if (rlt) { 459 if (fclose(stdout) == EOF) 460 bsdar_errc(bsdar, EX_IOERR, errno, 461 "fclose %s failed", rlt); 462 stdout = out; 463 free(rlt); 464 } 465 free(archive); 466 bsdar->filename = tmpac; 467 arscp_free_argv(); 468 arscp_free_mlist(list); 469 } 470 471 472 /* Replace modules of current archive. */ 473 static void 474 arscp_replace(struct list *list) 475 { 476 477 if (!arscp_target_exist()) 478 return; 479 arscp_mlist2argv(list); 480 ar_mode_r(bsdar); 481 arscp_free_argv(); 482 arscp_free_mlist(list); 483 } 484 485 /* Rename the temporary archive to the target archive. */ 486 static void 487 arscp_save(void) 488 { 489 mode_t mask; 490 491 if (target) { 492 if (rename(tmpac, target) < 0) 493 bsdar_errc(bsdar, EX_IOERR, errno, "rename failed"); 494 /* 495 * mkstemp creates temp files with mode 0600, here we 496 * set target archive mode per process umask. 497 */ 498 mask = umask(0); 499 umask(mask); 500 if (chmod(target, 0666 & ~mask) < 0) 501 bsdar_errc(bsdar, EX_IOERR, errno, "chmod failed"); 502 free(tmpac); 503 free(target); 504 tmpac = NULL; 505 target= NULL; 506 bsdar->filename = NULL; 507 } else 508 bsdar_warnc(bsdar, 0, "no open output archive"); 509 } 510 511 /* 512 * Discard all the contents of current archive. This is achieved by 513 * invoking CREATE cmd on current archive. 514 */ 515 static void 516 arscp_clear(void) 517 { 518 char *new_target; 519 520 if (target) { 521 new_target = strdup(target); 522 if (new_target == NULL) 523 bsdar_errc(bsdar, EX_SOFTWARE, errno, "strdup failed"); 524 arscp_create(NULL, new_target); 525 } 526 } 527 528 /* 529 * Quit ar(1). Note that END cmd will not SAVE current archive 530 * before exit. 531 */ 532 static void 533 arscp_end(int eval) 534 { 535 536 if (target) 537 free(target); 538 if (tmpac) { 539 if (unlink(tmpac) == -1) 540 bsdar_errc(bsdar, EX_IOERR, errno, "unlink %s failed", 541 tmpac); 542 free(tmpac); 543 } 544 545 exit(eval); 546 } 547 548 /* 549 * Check if target specified, i.e, whether OPEN or CREATE has been 550 * issued by user. 551 */ 552 static int 553 arscp_target_exist(void) 554 { 555 556 if (target) 557 return (1); 558 559 bsdar_warnc(bsdar, 0, "no open output archive"); 560 return (0); 561 } 562 563 /* Construct module list. */ 564 static struct list * 565 arscp_mlist(struct list *list, char *str) 566 { 567 struct list *l; 568 569 l = malloc(sizeof(*l)); 570 if (l == NULL) 571 bsdar_errc(bsdar, EX_SOFTWARE, errno, "malloc failed"); 572 l->str = str; 573 l->next = list; 574 575 return (l); 576 } 577 578 /* Calculate the length of a mlist. */ 579 static int 580 arscp_mlist_len(struct list *list) 581 { 582 int len; 583 584 for(len = 0; list; list = list->next) 585 len++; 586 587 return (len); 588 } 589 590 /* Free the space allocated for mod_list. */ 591 static void 592 arscp_free_mlist(struct list *list) 593 { 594 struct list *l; 595 596 /* Note that list->str was freed in arscp_free_argv. */ 597 for(; list; list = l) { 598 l = list->next; 599 free(list); 600 } 601 } 602 603 /* Convert mlist to argv array. */ 604 static void 605 arscp_mlist2argv(struct list *list) 606 { 607 char **argv; 608 int i, n; 609 610 n = arscp_mlist_len(list); 611 argv = malloc(n * sizeof(*argv)); 612 if (argv == NULL) 613 bsdar_errc(bsdar, EX_SOFTWARE, errno, "malloc failed"); 614 615 /* Note that module names are stored in reverse order in mlist. */ 616 for(i = n - 1; i >= 0; i--, list = list->next) { 617 if (list == NULL) 618 bsdar_errc(bsdar, EX_SOFTWARE, errno, "invalid mlist"); 619 argv[i] = list->str; 620 } 621 622 bsdar->argc = n; 623 bsdar->argv = argv; 624 } 625 626 /* Free space allocated for argv array and its elements. */ 627 static void 628 arscp_free_argv(void) 629 { 630 int i; 631 632 for(i = 0; i < bsdar->argc; i++) 633 free(bsdar->argv[i]); 634 635 free(bsdar->argv); 636 } 637 638 /* Show a prompt if we are in interactive mode */ 639 static void 640 arscp_prompt(void) 641 { 642 643 if (interactive) { 644 printf("AR >"); 645 fflush(stdout); 646 } 647 } 648 649 /* Main function for ar script mode. */ 650 void 651 ar_mode_script(struct bsdar *ar) 652 { 653 654 bsdar = ar; 655 interactive = isatty(fileno(stdin)); 656 while(yyparse()) { 657 if (!interactive) 658 arscp_end(1); 659 } 660 661 /* Script ends without END */ 662 arscp_end(EX_OK); 663 } 664