1 /* $NetBSD: compat.c,v 1.80 2010/08/07 06:44:08 sjg Exp $ */ 2 3 /* 4 * Copyright (c) 1988, 1989, 1990 The Regents of the University of California. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Adam de Boor. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 /* 36 * Copyright (c) 1988, 1989 by Adam de Boor 37 * Copyright (c) 1989 by Berkeley Softworks 38 * All rights reserved. 39 * 40 * This code is derived from software contributed to Berkeley by 41 * Adam de Boor. 42 * 43 * Redistribution and use in source and binary forms, with or without 44 * modification, are permitted provided that the following conditions 45 * are met: 46 * 1. Redistributions of source code must retain the above copyright 47 * notice, this list of conditions and the following disclaimer. 48 * 2. Redistributions in binary form must reproduce the above copyright 49 * notice, this list of conditions and the following disclaimer in the 50 * documentation and/or other materials provided with the distribution. 51 * 3. All advertising materials mentioning features or use of this software 52 * must display the following acknowledgement: 53 * This product includes software developed by the University of 54 * California, Berkeley and its contributors. 55 * 4. Neither the name of the University nor the names of its contributors 56 * may be used to endorse or promote products derived from this software 57 * without specific prior written permission. 58 * 59 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 60 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 61 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 62 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 63 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 64 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 65 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 66 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 67 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 68 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 69 * SUCH DAMAGE. 70 */ 71 72 #ifndef MAKE_NATIVE 73 static char rcsid[] = "$NetBSD: compat.c,v 1.80 2010/08/07 06:44:08 sjg Exp $"; 74 #else 75 #include <sys/cdefs.h> 76 #ifndef lint 77 #if 0 78 static char sccsid[] = "@(#)compat.c 8.2 (Berkeley) 3/19/94"; 79 #else 80 __RCSID("$NetBSD: compat.c,v 1.80 2010/08/07 06:44:08 sjg Exp $"); 81 #endif 82 #endif /* not lint */ 83 #endif 84 85 /*- 86 * compat.c -- 87 * The routines in this file implement the full-compatibility 88 * mode of PMake. Most of the special functionality of PMake 89 * is available in this mode. Things not supported: 90 * - different shells. 91 * - friendly variable substitution. 92 * 93 * Interface: 94 * Compat_Run Initialize things for this module and recreate 95 * thems as need creatin' 96 */ 97 98 #include <sys/types.h> 99 #include <sys/stat.h> 100 #include <sys/wait.h> 101 102 #include <ctype.h> 103 #include <errno.h> 104 #include <signal.h> 105 #include <stdio.h> 106 107 #include "make.h" 108 #include "hash.h" 109 #include "dir.h" 110 #include "job.h" 111 #include "pathnames.h" 112 113 /* 114 * The following array is used to make a fast determination of which 115 * characters are interpreted specially by the shell. If a command 116 * contains any of these characters, it is executed by the shell, not 117 * directly by us. 118 */ 119 120 static char meta[256]; 121 122 static GNode *curTarg = NULL; 123 static GNode *ENDNode; 124 static void CompatInterrupt(int); 125 126 static void 127 Compat_Init(void) 128 { 129 const char *cp; 130 131 Shell_Init(); /* setup default shell */ 132 133 for (cp = "#=|^(){};&<>*?[]:$`\\\n"; *cp != '\0'; cp++) { 134 meta[(unsigned char) *cp] = 1; 135 } 136 /* 137 * The null character serves as a sentinel in the string. 138 */ 139 meta[0] = 1; 140 } 141 142 /*- 143 *----------------------------------------------------------------------- 144 * CompatInterrupt -- 145 * Interrupt the creation of the current target and remove it if 146 * it ain't precious. 147 * 148 * Results: 149 * None. 150 * 151 * Side Effects: 152 * The target is removed and the process exits. If .INTERRUPT exists, 153 * its commands are run first WITH INTERRUPTS IGNORED.. 154 * 155 *----------------------------------------------------------------------- 156 */ 157 static void 158 CompatInterrupt(int signo) 159 { 160 GNode *gn; 161 162 if ((curTarg != NULL) && !Targ_Precious (curTarg)) { 163 char *p1; 164 char *file = Var_Value(TARGET, curTarg, &p1); 165 166 if (!noExecute && eunlink(file) != -1) { 167 Error("*** %s removed", file); 168 } 169 if (p1) 170 free(p1); 171 172 /* 173 * Run .INTERRUPT only if hit with interrupt signal 174 */ 175 if (signo == SIGINT) { 176 gn = Targ_FindNode(".INTERRUPT", TARG_NOCREATE); 177 if (gn != NULL) { 178 Compat_Make(gn, gn); 179 } 180 } 181 182 } 183 exit(signo); 184 } 185 186 /*- 187 *----------------------------------------------------------------------- 188 * CompatRunCommand -- 189 * Execute the next command for a target. If the command returns an 190 * error, the node's made field is set to ERROR and creation stops. 191 * 192 * Input: 193 * cmdp Command to execute 194 * gnp Node from which the command came 195 * 196 * Results: 197 * 0 if the command succeeded, 1 if an error occurred. 198 * 199 * Side Effects: 200 * The node's 'made' field may be set to ERROR. 201 * 202 *----------------------------------------------------------------------- 203 */ 204 int 205 CompatRunCommand(void *cmdp, void *gnp) 206 { 207 char *cmdStart; /* Start of expanded command */ 208 char *cp, *bp; 209 Boolean silent, /* Don't print command */ 210 doIt; /* Execute even if -n */ 211 volatile Boolean errCheck; /* Check errors */ 212 int reason; /* Reason for child's death */ 213 int status; /* Description of child's death */ 214 pid_t cpid; /* Child actually found */ 215 pid_t retstat; /* Result of wait */ 216 LstNode cmdNode; /* Node where current command is located */ 217 const char ** volatile av; /* Argument vector for thing to exec */ 218 char ** volatile mav;/* Copy of the argument vector for freeing */ 219 int argc; /* Number of arguments in av or 0 if not 220 * dynamically allocated */ 221 Boolean local; /* TRUE if command should be executed 222 * locally */ 223 Boolean useShell; /* TRUE if command should be executed 224 * using a shell */ 225 char * volatile cmd = (char *)cmdp; 226 GNode *gn = (GNode *)gnp; 227 228 silent = gn->type & OP_SILENT; 229 errCheck = !(gn->type & OP_IGNORE); 230 doIt = FALSE; 231 232 cmdNode = Lst_Member(gn->commands, cmd); 233 cmdStart = Var_Subst(NULL, cmd, gn, FALSE); 234 235 /* 236 * brk_string will return an argv with a NULL in av[0], thus causing 237 * execvp to choke and die horribly. Besides, how can we execute a null 238 * command? In any case, we warn the user that the command expanded to 239 * nothing (is this the right thing to do?). 240 */ 241 242 if (*cmdStart == '\0') { 243 free(cmdStart); 244 Error("%s expands to empty string", cmd); 245 return(0); 246 } 247 cmd = cmdStart; 248 Lst_Replace(cmdNode, cmdStart); 249 250 if ((gn->type & OP_SAVE_CMDS) && (gn != ENDNode)) { 251 (void)Lst_AtEnd(ENDNode->commands, cmdStart); 252 return(0); 253 } 254 if (strcmp(cmdStart, "...") == 0) { 255 gn->type |= OP_SAVE_CMDS; 256 return(0); 257 } 258 259 while ((*cmd == '@') || (*cmd == '-') || (*cmd == '+')) { 260 switch (*cmd) { 261 case '@': 262 silent = DEBUG(LOUD) ? FALSE : TRUE; 263 break; 264 case '-': 265 errCheck = FALSE; 266 break; 267 case '+': 268 doIt = TRUE; 269 if (!meta[0]) /* we came here from jobs */ 270 Compat_Init(); 271 break; 272 } 273 cmd++; 274 } 275 276 while (isspace((unsigned char)*cmd)) 277 cmd++; 278 279 #if !defined(MAKE_NATIVE) 280 /* 281 * In a non-native build, the host environment might be weird enough 282 * that it's necessary to go through a shell to get the correct 283 * behaviour. Or perhaps the shell has been replaced with something 284 * that does extra logging, and that should not be bypassed. 285 */ 286 useShell = TRUE; 287 #else 288 /* 289 * Search for meta characters in the command. If there are no meta 290 * characters, there's no need to execute a shell to execute the 291 * command. 292 */ 293 for (cp = cmd; !meta[(unsigned char)*cp]; cp++) { 294 continue; 295 } 296 useShell = (*cp != '\0'); 297 #endif 298 299 /* 300 * Print the command before echoing if we're not supposed to be quiet for 301 * this one. We also print the command if -n given. 302 */ 303 if (!silent || NoExecute(gn)) { 304 printf("%s\n", cmd); 305 fflush(stdout); 306 } 307 308 /* 309 * If we're not supposed to execute any commands, this is as far as 310 * we go... 311 */ 312 if (!doIt && NoExecute(gn)) { 313 return (0); 314 } 315 if (DEBUG(JOB)) 316 fprintf(debug_file, "Execute: '%s'\n", cmd); 317 318 again: 319 if (useShell) { 320 /* 321 * We need to pass the command off to the shell, typically 322 * because the command contains a "meta" character. 323 */ 324 static const char *shargv[4]; 325 326 shargv[0] = shellPath; 327 /* 328 * The following work for any of the builtin shell specs. 329 */ 330 if (DEBUG(SHELL)) 331 shargv[1] = "-xc"; 332 else 333 shargv[1] = "-c"; 334 shargv[2] = cmd; 335 shargv[3] = NULL; 336 av = shargv; 337 argc = 0; 338 bp = NULL; 339 mav = NULL; 340 } else { 341 /* 342 * No meta-characters, so no need to exec a shell. Break the command 343 * into words to form an argument vector we can execute. 344 */ 345 mav = brk_string(cmd, &argc, TRUE, &bp); 346 if (mav == NULL) { 347 useShell = 1; 348 goto again; 349 } 350 av = (const char **)mav; 351 } 352 353 local = TRUE; 354 355 /* 356 * Fork and execute the single command. If the fork fails, we abort. 357 */ 358 cpid = vFork(); 359 if (cpid < 0) { 360 Fatal("Could not fork"); 361 } 362 if (cpid == 0) { 363 Check_Cwd(av); 364 Var_ExportVars(); 365 if (local) 366 (void)execvp(av[0], (char *const *)UNCONST(av)); 367 else 368 (void)execv(av[0], (char *const *)UNCONST(av)); 369 execError("exec", av[0]); 370 _exit(1); 371 } 372 if (mav) 373 free(mav); 374 if (bp) 375 free(bp); 376 Lst_Replace(cmdNode, NULL); 377 378 /* 379 * The child is off and running. Now all we can do is wait... 380 */ 381 while (1) { 382 383 while ((retstat = wait(&reason)) != cpid) { 384 if (retstat > 0) 385 JobReapChild(retstat, reason, FALSE); /* not ours? */ 386 if (retstat == -1 && errno != EINTR) { 387 break; 388 } 389 } 390 391 if (retstat > -1) { 392 if (WIFSTOPPED(reason)) { 393 status = WSTOPSIG(reason); /* stopped */ 394 } else if (WIFEXITED(reason)) { 395 status = WEXITSTATUS(reason); /* exited */ 396 if (status != 0) { 397 if (DEBUG(ERROR)) { 398 fprintf(debug_file, "\n*** Failed target: %s\n*** Failed command: ", 399 gn->name); 400 for (cp = cmd; *cp; ) { 401 if (isspace((unsigned char)*cp)) { 402 fprintf(debug_file, " "); 403 while (isspace((unsigned char)*cp)) 404 cp++; 405 } else { 406 fprintf(debug_file, "%c", *cp); 407 cp++; 408 } 409 } 410 fprintf(debug_file, "\n"); 411 } 412 printf("*** Error code %d", status); 413 } 414 } else { 415 status = WTERMSIG(reason); /* signaled */ 416 printf("*** Signal %d", status); 417 } 418 419 420 if (!WIFEXITED(reason) || (status != 0)) { 421 if (errCheck) { 422 gn->made = ERROR; 423 if (keepgoing) { 424 /* 425 * Abort the current target, but let others 426 * continue. 427 */ 428 printf(" (continuing)\n"); 429 } 430 } else { 431 /* 432 * Continue executing commands for this target. 433 * If we return 0, this will happen... 434 */ 435 printf(" (ignored)\n"); 436 status = 0; 437 } 438 } 439 break; 440 } else { 441 Fatal("error in wait: %d: %s", retstat, strerror(errno)); 442 /*NOTREACHED*/ 443 } 444 } 445 free(cmdStart); 446 447 return (status); 448 } 449 450 /*- 451 *----------------------------------------------------------------------- 452 * Compat_Make -- 453 * Make a target. 454 * 455 * Input: 456 * gnp The node to make 457 * pgnp Parent to abort if necessary 458 * 459 * Results: 460 * 0 461 * 462 * Side Effects: 463 * If an error is detected and not being ignored, the process exits. 464 * 465 *----------------------------------------------------------------------- 466 */ 467 int 468 Compat_Make(void *gnp, void *pgnp) 469 { 470 GNode *gn = (GNode *)gnp; 471 GNode *pgn = (GNode *)pgnp; 472 473 if (!meta[0]) /* we came here from jobs */ 474 Compat_Init(); 475 if (gn->made == UNMADE && (gn == pgn || (pgn->type & OP_MADE) == 0)) { 476 /* 477 * First mark ourselves to be made, then apply whatever transformations 478 * the suffix module thinks are necessary. Once that's done, we can 479 * descend and make all our children. If any of them has an error 480 * but the -k flag was given, our 'make' field will be set FALSE again. 481 * This is our signal to not attempt to do anything but abort our 482 * parent as well. 483 */ 484 gn->flags |= REMAKE; 485 gn->made = BEINGMADE; 486 if ((gn->type & OP_MADE) == 0) 487 Suff_FindDeps(gn); 488 Lst_ForEach(gn->children, Compat_Make, gn); 489 if ((gn->flags & REMAKE) == 0) { 490 gn->made = ABORTED; 491 pgn->flags &= ~REMAKE; 492 goto cohorts; 493 } 494 495 if (Lst_Member(gn->iParents, pgn) != NULL) { 496 char *p1; 497 Var_Set(IMPSRC, Var_Value(TARGET, gn, &p1), pgn, 0); 498 if (p1) 499 free(p1); 500 } 501 502 /* 503 * All the children were made ok. Now cmtime contains the modification 504 * time of the newest child, we need to find out if we exist and when 505 * we were modified last. The criteria for datedness are defined by the 506 * Make_OODate function. 507 */ 508 if (DEBUG(MAKE)) { 509 fprintf(debug_file, "Examining %s...", gn->name); 510 } 511 if (! Make_OODate(gn)) { 512 gn->made = UPTODATE; 513 if (DEBUG(MAKE)) { 514 fprintf(debug_file, "up-to-date.\n"); 515 } 516 goto cohorts; 517 } else if (DEBUG(MAKE)) { 518 fprintf(debug_file, "out-of-date.\n"); 519 } 520 521 /* 522 * If the user is just seeing if something is out-of-date, exit now 523 * to tell him/her "yes". 524 */ 525 if (queryFlag) { 526 exit(1); 527 } 528 529 /* 530 * We need to be re-made. We also have to make sure we've got a $? 531 * variable. To be nice, we also define the $> variable using 532 * Make_DoAllVar(). 533 */ 534 Make_DoAllVar(gn); 535 536 /* 537 * Alter our type to tell if errors should be ignored or things 538 * should not be printed so CompatRunCommand knows what to do. 539 */ 540 if (Targ_Ignore(gn)) { 541 gn->type |= OP_IGNORE; 542 } 543 if (Targ_Silent(gn)) { 544 gn->type |= OP_SILENT; 545 } 546 547 if (Job_CheckCommands(gn, Fatal)) { 548 /* 549 * Our commands are ok, but we still have to worry about the -t 550 * flag... 551 */ 552 if (!touchFlag || (gn->type & OP_MAKE)) { 553 curTarg = gn; 554 Lst_ForEach(gn->commands, CompatRunCommand, gn); 555 curTarg = NULL; 556 } else { 557 Job_Touch(gn, gn->type & OP_SILENT); 558 } 559 } else { 560 gn->made = ERROR; 561 } 562 563 if (gn->made != ERROR) { 564 /* 565 * If the node was made successfully, mark it so, update 566 * its modification time and timestamp all its parents. Note 567 * that for .ZEROTIME targets, the timestamping isn't done. 568 * This is to keep its state from affecting that of its parent. 569 */ 570 gn->made = MADE; 571 pgn->flags |= Make_Recheck(gn) == 0 ? FORCE : 0; 572 if (!(gn->type & OP_EXEC)) { 573 pgn->flags |= CHILDMADE; 574 Make_TimeStamp(pgn, gn); 575 } 576 } else if (keepgoing) { 577 pgn->flags &= ~REMAKE; 578 } else { 579 PrintOnError(gn, "\n\nStop."); 580 exit(1); 581 } 582 } else if (gn->made == ERROR) { 583 /* 584 * Already had an error when making this beastie. Tell the parent 585 * to abort. 586 */ 587 pgn->flags &= ~REMAKE; 588 } else { 589 if (Lst_Member(gn->iParents, pgn) != NULL) { 590 char *p1; 591 Var_Set(IMPSRC, Var_Value(TARGET, gn, &p1), pgn, 0); 592 if (p1) 593 free(p1); 594 } 595 switch(gn->made) { 596 case BEINGMADE: 597 Error("Graph cycles through %s", gn->name); 598 gn->made = ERROR; 599 pgn->flags &= ~REMAKE; 600 break; 601 case MADE: 602 if ((gn->type & OP_EXEC) == 0) { 603 pgn->flags |= CHILDMADE; 604 Make_TimeStamp(pgn, gn); 605 } 606 break; 607 case UPTODATE: 608 if ((gn->type & OP_EXEC) == 0) { 609 Make_TimeStamp(pgn, gn); 610 } 611 break; 612 default: 613 break; 614 } 615 } 616 617 cohorts: 618 Lst_ForEach(gn->cohorts, Compat_Make, pgnp); 619 return (0); 620 } 621 622 /*- 623 *----------------------------------------------------------------------- 624 * Compat_Run -- 625 * Initialize this mode and start making. 626 * 627 * Input: 628 * targs List of target nodes to re-create 629 * 630 * Results: 631 * None. 632 * 633 * Side Effects: 634 * Guess what? 635 * 636 *----------------------------------------------------------------------- 637 */ 638 void 639 Compat_Run(Lst targs) 640 { 641 GNode *gn = NULL;/* Current root target */ 642 int errors; /* Number of targets not remade due to errors */ 643 644 Compat_Init(); 645 646 if (bmake_signal(SIGINT, SIG_IGN) != SIG_IGN) { 647 bmake_signal(SIGINT, CompatInterrupt); 648 } 649 if (bmake_signal(SIGTERM, SIG_IGN) != SIG_IGN) { 650 bmake_signal(SIGTERM, CompatInterrupt); 651 } 652 if (bmake_signal(SIGHUP, SIG_IGN) != SIG_IGN) { 653 bmake_signal(SIGHUP, CompatInterrupt); 654 } 655 if (bmake_signal(SIGQUIT, SIG_IGN) != SIG_IGN) { 656 bmake_signal(SIGQUIT, CompatInterrupt); 657 } 658 659 ENDNode = Targ_FindNode(".END", TARG_CREATE); 660 ENDNode->type = OP_SPECIAL; 661 /* 662 * If the user has defined a .BEGIN target, execute the commands attached 663 * to it. 664 */ 665 if (!queryFlag) { 666 gn = Targ_FindNode(".BEGIN", TARG_NOCREATE); 667 if (gn != NULL) { 668 Compat_Make(gn, gn); 669 if (gn->made == ERROR) { 670 PrintOnError(gn, "\n\nStop."); 671 exit(1); 672 } 673 } 674 } 675 676 /* 677 * Expand .USE nodes right now, because they can modify the structure 678 * of the tree. 679 */ 680 Make_ExpandUse(targs); 681 682 /* 683 * For each entry in the list of targets to create, call Compat_Make on 684 * it to create the thing. Compat_Make will leave the 'made' field of gn 685 * in one of several states: 686 * UPTODATE gn was already up-to-date 687 * MADE gn was recreated successfully 688 * ERROR An error occurred while gn was being created 689 * ABORTED gn was not remade because one of its inferiors 690 * could not be made due to errors. 691 */ 692 errors = 0; 693 while (!Lst_IsEmpty (targs)) { 694 gn = (GNode *)Lst_DeQueue(targs); 695 Compat_Make(gn, gn); 696 697 if (gn->made == UPTODATE) { 698 printf("`%s' is up to date.\n", gn->name); 699 } else if (gn->made == ABORTED) { 700 printf("`%s' not remade because of errors.\n", gn->name); 701 errors += 1; 702 } 703 } 704 705 /* 706 * If the user has defined a .END target, run its commands. 707 */ 708 if (errors == 0) { 709 Compat_Make(ENDNode, ENDNode); 710 if (gn->made == ERROR) { 711 PrintOnError(gn, "\n\nStop."); 712 exit(1); 713 } 714 } 715 } 716