1 /* $NetBSD: compat.c,v 1.44 2002/06/15 18:24:56 wiz Exp $ */ 2 3 /* 4 * Copyright (c) 1988, 1989, 1990 The Regents of the University of California. 5 * Copyright (c) 1988, 1989 by Adam de Boor 6 * Copyright (c) 1989 by Berkeley Softworks 7 * All rights reserved. 8 * 9 * This code is derived from software contributed to Berkeley by 10 * Adam de Boor. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. All advertising materials mentioning features or use of this software 21 * must display the following acknowledgement: 22 * This product includes software developed by the University of 23 * California, Berkeley and its contributors. 24 * 4. Neither the name of the University nor the names of its contributors 25 * may be used to endorse or promote products derived from this software 26 * without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 * SUCH DAMAGE. 39 */ 40 41 #ifdef MAKE_BOOTSTRAP 42 static char rcsid[] = "$NetBSD: compat.c,v 1.44 2002/06/15 18:24:56 wiz Exp $"; 43 #else 44 #include <sys/cdefs.h> 45 #ifndef lint 46 #if 0 47 static char sccsid[] = "@(#)compat.c 8.2 (Berkeley) 3/19/94"; 48 #else 49 __RCSID("$NetBSD: compat.c,v 1.44 2002/06/15 18:24:56 wiz Exp $"); 50 #endif 51 #endif /* not lint */ 52 #endif 53 54 /*- 55 * compat.c -- 56 * The routines in this file implement the full-compatibility 57 * mode of PMake. Most of the special functionality of PMake 58 * is available in this mode. Things not supported: 59 * - different shells. 60 * - friendly variable substitution. 61 * 62 * Interface: 63 * Compat_Run Initialize things for this module and recreate 64 * thems as need creatin' 65 */ 66 67 #include <sys/types.h> 68 #include <sys/stat.h> 69 #include <sys/wait.h> 70 71 #include <ctype.h> 72 #include <errno.h> 73 #include <signal.h> 74 #include <stdio.h> 75 76 #include "make.h" 77 #include "hash.h" 78 #include "dir.h" 79 #include "job.h" 80 #include "pathnames.h" 81 82 /* 83 * The following array is used to make a fast determination of which 84 * characters are interpreted specially by the shell. If a command 85 * contains any of these characters, it is executed by the shell, not 86 * directly by us. 87 */ 88 89 static char meta[256]; 90 91 static GNode *curTarg = NILGNODE; 92 static GNode *ENDNode; 93 static void CompatInterrupt(int); 94 static int CompatRunCommand(ClientData, ClientData); 95 static int CompatMake(ClientData, ClientData); 96 97 /*- 98 *----------------------------------------------------------------------- 99 * CompatInterrupt -- 100 * Interrupt the creation of the current target and remove it if 101 * it ain't precious. 102 * 103 * Results: 104 * None. 105 * 106 * Side Effects: 107 * The target is removed and the process exits. If .INTERRUPT exists, 108 * its commands are run first WITH INTERRUPTS IGNORED.. 109 * 110 *----------------------------------------------------------------------- 111 */ 112 static void 113 CompatInterrupt(int signo) 114 { 115 GNode *gn; 116 117 if ((curTarg != NILGNODE) && !Targ_Precious (curTarg)) { 118 char *p1; 119 char *file = Var_Value (TARGET, curTarg, &p1); 120 121 if (!noExecute && eunlink(file) != -1) { 122 Error("*** %s removed", file); 123 } 124 if (p1) 125 free(p1); 126 127 /* 128 * Run .INTERRUPT only if hit with interrupt signal 129 */ 130 if (signo == SIGINT) { 131 gn = Targ_FindNode(".INTERRUPT", TARG_NOCREATE); 132 if (gn != NILGNODE) { 133 Lst_ForEach(gn->commands, CompatRunCommand, (ClientData)gn); 134 } 135 } 136 137 } 138 exit (signo); 139 } 140 141 /*- 142 *----------------------------------------------------------------------- 143 * CompatRunCommand -- 144 * Execute the next command for a target. If the command returns an 145 * error, the node's made field is set to ERROR and creation stops. 146 * 147 * Input: 148 * cmdp Command to execute 149 * gnp Node from which the command came 150 * 151 * Results: 152 * 0 if the command succeeded, 1 if an error occurred. 153 * 154 * Side Effects: 155 * The node's 'made' field may be set to ERROR. 156 * 157 *----------------------------------------------------------------------- 158 */ 159 static int 160 CompatRunCommand(ClientData cmdp, ClientData gnp) 161 { 162 char *cmdStart; /* Start of expanded command */ 163 char *cp, *bp; 164 Boolean silent, /* Don't print command */ 165 errCheck; /* Check errors */ 166 int reason; /* Reason for child's death */ 167 int status; /* Description of child's death */ 168 int cpid; /* Child actually found */ 169 ReturnStatus retstat; /* Status of fork */ 170 LstNode cmdNode; /* Node where current command is located */ 171 char **av; /* Argument vector for thing to exec */ 172 int argc; /* Number of arguments in av or 0 if not 173 * dynamically allocated */ 174 Boolean local; /* TRUE if command should be executed 175 * locally */ 176 char *cmd = (char *) cmdp; 177 GNode *gn = (GNode *) gnp; 178 179 /* 180 * Avoid clobbered variable warnings by forcing the compiler 181 * to ``unregister'' variables 182 */ 183 #if __GNUC__ 184 (void) &av; 185 (void) &errCheck; 186 #endif 187 silent = gn->type & OP_SILENT; 188 errCheck = !(gn->type & OP_IGNORE); 189 190 cmdNode = Lst_Member (gn->commands, (ClientData)cmd); 191 cmdStart = Var_Subst (NULL, cmd, gn, FALSE); 192 193 /* 194 * brk_string will return an argv with a NULL in av[0], thus causing 195 * execvp to choke and die horribly. Besides, how can we execute a null 196 * command? In any case, we warn the user that the command expanded to 197 * nothing (is this the right thing to do?). 198 */ 199 200 if (*cmdStart == '\0') { 201 free(cmdStart); 202 Error("%s expands to empty string", cmd); 203 return(0); 204 } else { 205 cmd = cmdStart; 206 } 207 Lst_Replace (cmdNode, (ClientData)cmdStart); 208 209 if ((gn->type & OP_SAVE_CMDS) && (gn != ENDNode)) { 210 (void)Lst_AtEnd(ENDNode->commands, (ClientData)cmdStart); 211 return(0); 212 } else if (strcmp(cmdStart, "...") == 0) { 213 gn->type |= OP_SAVE_CMDS; 214 return(0); 215 } 216 217 while ((*cmd == '@') || (*cmd == '-')) { 218 if (*cmd == '@') { 219 silent = TRUE; 220 } else { 221 errCheck = FALSE; 222 } 223 cmd++; 224 } 225 226 while (isspace((unsigned char)*cmd)) 227 cmd++; 228 229 /* 230 * Search for meta characters in the command. If there are no meta 231 * characters, there's no need to execute a shell to execute the 232 * command. 233 */ 234 for (cp = cmd; !meta[(unsigned char)*cp]; cp++) { 235 continue; 236 } 237 238 /* 239 * Print the command before echoing if we're not supposed to be quiet for 240 * this one. We also print the command if -n given. 241 */ 242 if (!silent || NoExecute(gn)) { 243 printf ("%s\n", cmd); 244 fflush(stdout); 245 } 246 247 /* 248 * If we're not supposed to execute any commands, this is as far as 249 * we go... 250 */ 251 if (NoExecute(gn)) { 252 return (0); 253 } 254 255 if (*cp != '\0') { 256 /* 257 * If *cp isn't the null character, we hit a "meta" character and 258 * need to pass the command off to the shell. We give the shell the 259 * -e flag as well as -c if it's supposed to exit when it hits an 260 * error. 261 */ 262 static char *shargv[4] = { _PATH_BSHELL }; 263 264 if (DEBUG(SHELL)) 265 shargv[1] = (errCheck ? "-exc" : "-xc"); 266 else 267 shargv[1] = (errCheck ? "-ec" : "-c"); 268 shargv[2] = cmd; 269 shargv[3] = (char *)NULL; 270 av = shargv; 271 argc = 0; 272 bp = NULL; 273 } else { 274 /* 275 * No meta-characters, so no need to exec a shell. Break the command 276 * into words to form an argument vector we can execute. 277 */ 278 av = brk_string(cmd, &argc, TRUE, &bp); 279 } 280 281 local = TRUE; 282 283 /* 284 * Fork and execute the single command. If the fork fails, we abort. 285 */ 286 cpid = vfork(); 287 if (cpid < 0) { 288 Fatal("Could not fork"); 289 } 290 if (cpid == 0) { 291 Check_Cwd(av); 292 if (local) 293 (void)execvp(av[0], av); 294 else 295 (void)execv(av[0], av); 296 execError("exec", av[0]); 297 _exit(1); 298 } 299 if (bp) { 300 free(av); 301 free(bp); 302 } 303 free(cmdStart); 304 Lst_Replace (cmdNode, (ClientData) NULL); 305 306 /* 307 * The child is off and running. Now all we can do is wait... 308 */ 309 while (1) { 310 311 while ((retstat = wait(&reason)) != cpid) { 312 if (retstat == -1 && errno != EINTR) { 313 break; 314 } 315 } 316 317 if (retstat > -1) { 318 if (WIFSTOPPED(reason)) { 319 status = WSTOPSIG(reason); /* stopped */ 320 } else if (WIFEXITED(reason)) { 321 status = WEXITSTATUS(reason); /* exited */ 322 if (status != 0) { 323 printf ("*** Error code %d", status); 324 } 325 } else { 326 status = WTERMSIG(reason); /* signaled */ 327 printf ("*** Signal %d", status); 328 } 329 330 331 if (!WIFEXITED(reason) || (status != 0)) { 332 if (errCheck) { 333 gn->made = ERROR; 334 if (keepgoing) { 335 /* 336 * Abort the current target, but let others 337 * continue. 338 */ 339 printf (" (continuing)\n"); 340 } 341 } else { 342 /* 343 * Continue executing commands for this target. 344 * If we return 0, this will happen... 345 */ 346 printf (" (ignored)\n"); 347 status = 0; 348 } 349 } 350 break; 351 } else { 352 Fatal ("error in wait: %d: %s", retstat, strerror(errno)); 353 /*NOTREACHED*/ 354 } 355 } 356 357 return (status); 358 } 359 360 /*- 361 *----------------------------------------------------------------------- 362 * CompatMake -- 363 * Make a target. 364 * 365 * Input: 366 * gnp The node to make 367 * pgnp Parent to abort if necessary 368 * 369 * Results: 370 * 0 371 * 372 * Side Effects: 373 * If an error is detected and not being ignored, the process exits. 374 * 375 *----------------------------------------------------------------------- 376 */ 377 static int 378 CompatMake(ClientData gnp, ClientData pgnp) 379 { 380 GNode *gn = (GNode *) gnp; 381 GNode *pgn = (GNode *) pgnp; 382 383 if (gn->made == UNMADE && (gn == pgn || (pgn->type & OP_MADE) == 0)) { 384 /* 385 * First mark ourselves to be made, then apply whatever transformations 386 * the suffix module thinks are necessary. Once that's done, we can 387 * descend and make all our children. If any of them has an error 388 * but the -k flag was given, our 'make' field will be set FALSE again. 389 * This is our signal to not attempt to do anything but abort our 390 * parent as well. 391 */ 392 gn->flags |= REMAKE; 393 gn->made = BEINGMADE; 394 if ((gn->type & OP_MADE) == 0) 395 Suff_FindDeps (gn); 396 Lst_ForEach (gn->children, CompatMake, (ClientData)gn); 397 if ((gn->flags & REMAKE) == 0) { 398 gn->made = ABORTED; 399 pgn->flags &= ~REMAKE; 400 goto cohorts; 401 } 402 403 if (Lst_Member (gn->iParents, pgn) != NILLNODE) { 404 char *p1; 405 Var_Set (IMPSRC, Var_Value(TARGET, gn, &p1), pgn, 0); 406 if (p1) 407 free(p1); 408 } 409 410 /* 411 * All the children were made ok. Now cmtime contains the modification 412 * time of the newest child, we need to find out if we exist and when 413 * we were modified last. The criteria for datedness are defined by the 414 * Make_OODate function. 415 */ 416 if (DEBUG(MAKE)) { 417 printf("Examining %s...", gn->name); 418 } 419 if (! Make_OODate(gn)) { 420 gn->made = UPTODATE; 421 if (DEBUG(MAKE)) { 422 printf("up-to-date.\n"); 423 } 424 goto cohorts; 425 } else if (DEBUG(MAKE)) { 426 printf("out-of-date.\n"); 427 } 428 429 /* 430 * If the user is just seeing if something is out-of-date, exit now 431 * to tell him/her "yes". 432 */ 433 if (queryFlag) { 434 exit (1); 435 } 436 437 /* 438 * We need to be re-made. We also have to make sure we've got a $? 439 * variable. To be nice, we also define the $> variable using 440 * Make_DoAllVar(). 441 */ 442 Make_DoAllVar(gn); 443 444 /* 445 * Alter our type to tell if errors should be ignored or things 446 * should not be printed so CompatRunCommand knows what to do. 447 */ 448 if (Targ_Ignore (gn)) { 449 gn->type |= OP_IGNORE; 450 } 451 if (Targ_Silent (gn)) { 452 gn->type |= OP_SILENT; 453 } 454 455 if (Job_CheckCommands (gn, Fatal)) { 456 /* 457 * Our commands are ok, but we still have to worry about the -t 458 * flag... 459 */ 460 if (!touchFlag || (gn->type & OP_MAKE)) { 461 curTarg = gn; 462 Lst_ForEach (gn->commands, CompatRunCommand, (ClientData)gn); 463 curTarg = NILGNODE; 464 } else { 465 Job_Touch (gn, gn->type & OP_SILENT); 466 } 467 } else { 468 gn->made = ERROR; 469 } 470 471 if (gn->made != ERROR) { 472 /* 473 * If the node was made successfully, mark it so, update 474 * its modification time and timestamp all its parents. Note 475 * that for .ZEROTIME targets, the timestamping isn't done. 476 * This is to keep its state from affecting that of its parent. 477 */ 478 gn->made = MADE; 479 pgn->flags |= Make_Recheck(gn) == 0 ? FORCE : 0; 480 if (!(gn->type & OP_EXEC)) { 481 pgn->flags |= CHILDMADE; 482 Make_TimeStamp(pgn, gn); 483 } 484 } else if (keepgoing) { 485 pgn->flags &= ~REMAKE; 486 } else { 487 PrintOnError("\n\nStop."); 488 exit (1); 489 } 490 } else if (gn->made == ERROR) { 491 /* 492 * Already had an error when making this beastie. Tell the parent 493 * to abort. 494 */ 495 pgn->flags &= ~REMAKE; 496 } else { 497 if (Lst_Member (gn->iParents, pgn) != NILLNODE) { 498 char *p1; 499 Var_Set (IMPSRC, Var_Value(TARGET, gn, &p1), pgn, 0); 500 if (p1) 501 free(p1); 502 } 503 switch(gn->made) { 504 case BEINGMADE: 505 Error("Graph cycles through %s", gn->name); 506 gn->made = ERROR; 507 pgn->flags &= ~REMAKE; 508 break; 509 case MADE: 510 if ((gn->type & OP_EXEC) == 0) { 511 pgn->flags |= CHILDMADE; 512 Make_TimeStamp(pgn, gn); 513 } 514 break; 515 case UPTODATE: 516 if ((gn->type & OP_EXEC) == 0) { 517 Make_TimeStamp(pgn, gn); 518 } 519 break; 520 default: 521 break; 522 } 523 } 524 525 cohorts: 526 Lst_ForEach (gn->cohorts, CompatMake, pgnp); 527 return (0); 528 } 529 530 /*- 531 *----------------------------------------------------------------------- 532 * Compat_Run -- 533 * Initialize this mode and start making. 534 * 535 * Input: 536 * targs List of target nodes to re-create 537 * 538 * Results: 539 * None. 540 * 541 * Side Effects: 542 * Guess what? 543 * 544 *----------------------------------------------------------------------- 545 */ 546 void 547 Compat_Run(Lst targs) 548 { 549 char *cp; /* Pointer to string of shell meta-characters */ 550 GNode *gn = NULL;/* Current root target */ 551 int errors; /* Number of targets not remade due to errors */ 552 553 if (signal(SIGINT, SIG_IGN) != SIG_IGN) { 554 signal(SIGINT, CompatInterrupt); 555 } 556 if (signal(SIGTERM, SIG_IGN) != SIG_IGN) { 557 signal(SIGTERM, CompatInterrupt); 558 } 559 if (signal(SIGHUP, SIG_IGN) != SIG_IGN) { 560 signal(SIGHUP, CompatInterrupt); 561 } 562 if (signal(SIGQUIT, SIG_IGN) != SIG_IGN) { 563 signal(SIGQUIT, CompatInterrupt); 564 } 565 566 for (cp = "#=|^(){};&<>*?[]:$`\\\n"; *cp != '\0'; cp++) { 567 meta[(unsigned char) *cp] = 1; 568 } 569 /* 570 * The null character serves as a sentinel in the string. 571 */ 572 meta[0] = 1; 573 574 ENDNode = Targ_FindNode(".END", TARG_CREATE); 575 /* 576 * If the user has defined a .BEGIN target, execute the commands attached 577 * to it. 578 */ 579 if (!queryFlag) { 580 gn = Targ_FindNode(".BEGIN", TARG_NOCREATE); 581 if (gn != NILGNODE) { 582 Lst_ForEach(gn->commands, CompatRunCommand, (ClientData)gn); 583 if (gn->made == ERROR) { 584 PrintOnError("\n\nStop."); 585 exit(1); 586 } 587 } 588 } 589 590 /* 591 * Expand .USE nodes right now, because they can modify the structure 592 * of the tree. 593 */ 594 Lst_Destroy(Make_ExpandUse(targs), NOFREE); 595 596 /* 597 * For each entry in the list of targets to create, call CompatMake on 598 * it to create the thing. CompatMake will leave the 'made' field of gn 599 * in one of several states: 600 * UPTODATE gn was already up-to-date 601 * MADE gn was recreated successfully 602 * ERROR An error occurred while gn was being created 603 * ABORTED gn was not remade because one of its inferiors 604 * could not be made due to errors. 605 */ 606 errors = 0; 607 while (!Lst_IsEmpty (targs)) { 608 gn = (GNode *) Lst_DeQueue (targs); 609 CompatMake (gn, gn); 610 611 if (gn->made == UPTODATE) { 612 printf ("`%s' is up to date.\n", gn->name); 613 } else if (gn->made == ABORTED) { 614 printf ("`%s' not remade because of errors.\n", gn->name); 615 errors += 1; 616 } 617 } 618 619 /* 620 * If the user has defined a .END target, run its commands. 621 */ 622 if (errors == 0) { 623 Lst_ForEach(ENDNode->commands, CompatRunCommand, (ClientData)gn); 624 if (gn->made == ERROR) { 625 PrintOnError("\n\nStop."); 626 exit(1); 627 } 628 } 629 } 630