1 /* $NetBSD: job.c,v 1.163 2012/07/03 21:03:40 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: job.c,v 1.163 2012/07/03 21:03:40 sjg Exp $"; 74 #else 75 #include <sys/cdefs.h> 76 #ifndef lint 77 #if 0 78 static char sccsid[] = "@(#)job.c 8.2 (Berkeley) 3/19/94"; 79 #else 80 __RCSID("$NetBSD: job.c,v 1.163 2012/07/03 21:03:40 sjg Exp $"); 81 #endif 82 #endif /* not lint */ 83 #endif 84 85 /*- 86 * job.c -- 87 * handle the creation etc. of our child processes. 88 * 89 * Interface: 90 * Job_Make Start the creation of the given target. 91 * 92 * Job_CatchChildren Check for and handle the termination of any 93 * children. This must be called reasonably 94 * frequently to keep the whole make going at 95 * a decent clip, since job table entries aren't 96 * removed until their process is caught this way. 97 * 98 * Job_CatchOutput Print any output our children have produced. 99 * Should also be called fairly frequently to 100 * keep the user informed of what's going on. 101 * If no output is waiting, it will block for 102 * a time given by the SEL_* constants, below, 103 * or until output is ready. 104 * 105 * Job_Init Called to intialize this module. in addition, 106 * any commands attached to the .BEGIN target 107 * are executed before this function returns. 108 * Hence, the makefile must have been parsed 109 * before this function is called. 110 * 111 * Job_End Cleanup any memory used. 112 * 113 * Job_ParseShell Given the line following a .SHELL target, parse 114 * the line as a shell specification. Returns 115 * FAILURE if the spec was incorrect. 116 * 117 * Job_Finish Perform any final processing which needs doing. 118 * This includes the execution of any commands 119 * which have been/were attached to the .END 120 * target. It should only be called when the 121 * job table is empty. 122 * 123 * Job_AbortAll Abort all currently running jobs. It doesn't 124 * handle output or do anything for the jobs, 125 * just kills them. It should only be called in 126 * an emergency, as it were. 127 * 128 * Job_CheckCommands Verify that the commands for a target are 129 * ok. Provide them if necessary and possible. 130 * 131 * Job_Touch Update a target without really updating it. 132 * 133 * Job_Wait Wait for all currently-running jobs to finish. 134 */ 135 136 #include <sys/types.h> 137 #include <sys/stat.h> 138 #include <sys/file.h> 139 #include <sys/time.h> 140 #include <sys/wait.h> 141 142 #include <errno.h> 143 #include <fcntl.h> 144 #ifndef USE_SELECT 145 #include <poll.h> 146 #endif 147 #include <signal.h> 148 #include <stdio.h> 149 #include <string.h> 150 #include <utime.h> 151 152 #include "make.h" 153 #include "hash.h" 154 #include "dir.h" 155 #include "job.h" 156 #include "pathnames.h" 157 #include "trace.h" 158 # define STATIC static 159 160 /* 161 * error handling variables 162 */ 163 static int errors = 0; /* number of errors reported */ 164 static int aborting = 0; /* why is the make aborting? */ 165 #define ABORT_ERROR 1 /* Because of an error */ 166 #define ABORT_INTERRUPT 2 /* Because it was interrupted */ 167 #define ABORT_WAIT 3 /* Waiting for jobs to finish */ 168 #define JOB_TOKENS "+EI+" /* Token to requeue for each abort state */ 169 170 /* 171 * this tracks the number of tokens currently "out" to build jobs. 172 */ 173 int jobTokensRunning = 0; 174 int not_parallel = 0; /* set if .NOT_PARALLEL */ 175 176 /* 177 * XXX: Avoid SunOS bug... FILENO() is fp->_file, and file 178 * is a char! So when we go above 127 we turn negative! 179 */ 180 #define FILENO(a) ((unsigned) fileno(a)) 181 182 /* 183 * post-make command processing. The node postCommands is really just the 184 * .END target but we keep it around to avoid having to search for it 185 * all the time. 186 */ 187 static GNode *postCommands = NULL; 188 /* node containing commands to execute when 189 * everything else is done */ 190 static int numCommands; /* The number of commands actually printed 191 * for a target. Should this number be 192 * 0, no shell will be executed. */ 193 194 /* 195 * Return values from JobStart. 196 */ 197 #define JOB_RUNNING 0 /* Job is running */ 198 #define JOB_ERROR 1 /* Error in starting the job */ 199 #define JOB_FINISHED 2 /* The job is already finished */ 200 201 /* 202 * Descriptions for various shells. 203 * 204 * The build environment may set DEFSHELL_INDEX to one of 205 * DEFSHELL_INDEX_SH, DEFSHELL_INDEX_KSH, or DEFSHELL_INDEX_CSH, to 206 * select one of the prefedined shells as the default shell. 207 * 208 * Alternatively, the build environment may set DEFSHELL_CUSTOM to the 209 * name or the full path of a sh-compatible shell, which will be used as 210 * the default shell. 211 * 212 * ".SHELL" lines in Makefiles can choose the default shell from the 213 # set defined here, or add additional shells. 214 */ 215 216 #ifdef DEFSHELL_CUSTOM 217 #define DEFSHELL_INDEX_CUSTOM 0 218 #define DEFSHELL_INDEX_SH 1 219 #define DEFSHELL_INDEX_KSH 2 220 #define DEFSHELL_INDEX_CSH 3 221 #else /* !DEFSHELL_CUSTOM */ 222 #define DEFSHELL_INDEX_SH 0 223 #define DEFSHELL_INDEX_KSH 1 224 #define DEFSHELL_INDEX_CSH 2 225 #endif /* !DEFSHELL_CUSTOM */ 226 227 #ifndef DEFSHELL_INDEX 228 #define DEFSHELL_INDEX 0 /* DEFSHELL_INDEX_CUSTOM or DEFSHELL_INDEX_SH */ 229 #endif /* !DEFSHELL_INDEX */ 230 231 static Shell shells[] = { 232 #ifdef DEFSHELL_CUSTOM 233 /* 234 * An sh-compatible shell with a non-standard name. 235 * 236 * Keep this in sync with the "sh" description below, but avoid 237 * non-portable features that might not be supplied by all 238 * sh-compatible shells. 239 */ 240 { 241 DEFSHELL_CUSTOM, 242 FALSE, "", "", "", 0, 243 FALSE, "echo \"%s\"\n", "%s\n", "{ %s \n} || exit $?\n", "'\n'", '#', 244 "", 245 "", 246 }, 247 #endif /* DEFSHELL_CUSTOM */ 248 /* 249 * SH description. Echo control is also possible and, under 250 * sun UNIX anyway, one can even control error checking. 251 */ 252 { 253 "sh", 254 FALSE, "", "", "", 0, 255 FALSE, "echo \"%s\"\n", "%s\n", "{ %s \n} || exit $?\n", "'\n'", '#', 256 #if defined(MAKE_NATIVE) && defined(__NetBSD__) 257 "q", 258 #else 259 "", 260 #endif 261 "", 262 }, 263 /* 264 * KSH description. 265 */ 266 { 267 "ksh", 268 TRUE, "set +v", "set -v", "set +v", 6, 269 FALSE, "echo \"%s\"\n", "%s\n", "{ %s \n} || exit $?\n", "'\n'", '#', 270 "v", 271 "", 272 }, 273 /* 274 * CSH description. The csh can do echo control by playing 275 * with the setting of the 'echo' shell variable. Sadly, 276 * however, it is unable to do error control nicely. 277 */ 278 { 279 "csh", 280 TRUE, "unset verbose", "set verbose", "unset verbose", 10, 281 FALSE, "echo \"%s\"\n", "csh -c \"%s || exit 0\"\n", "", "'\\\n'", '#', 282 "v", "e", 283 }, 284 /* 285 * UNKNOWN. 286 */ 287 { 288 NULL, 289 FALSE, NULL, NULL, NULL, 0, 290 FALSE, NULL, NULL, NULL, NULL, 0, 291 NULL, NULL, 292 } 293 }; 294 static Shell *commandShell = &shells[DEFSHELL_INDEX]; /* this is the shell to 295 * which we pass all 296 * commands in the Makefile. 297 * It is set by the 298 * Job_ParseShell function */ 299 const char *shellPath = NULL, /* full pathname of 300 * executable image */ 301 *shellName = NULL; /* last component of shell */ 302 static const char *shellArgv = NULL; /* Custom shell args */ 303 304 305 STATIC Job *job_table; /* The structures that describe them */ 306 STATIC Job *job_table_end; /* job_table + maxJobs */ 307 static int wantToken; /* we want a token */ 308 static int lurking_children = 0; 309 static int make_suspended = 0; /* non-zero if we've seen a SIGTSTP (etc) */ 310 311 /* 312 * Set of descriptors of pipes connected to 313 * the output channels of children 314 */ 315 static struct pollfd *fds = NULL; 316 static Job **jobfds = NULL; 317 static int nfds = 0; 318 static void watchfd(Job *); 319 static void clearfd(Job *); 320 static int readyfd(Job *); 321 322 STATIC GNode *lastNode; /* The node for which output was most recently 323 * produced. */ 324 static char *targPrefix = NULL; /* What we print at the start of TARG_FMT */ 325 static Job tokenWaitJob; /* token wait pseudo-job */ 326 327 static Job childExitJob; /* child exit pseudo-job */ 328 #define CHILD_EXIT "." 329 #define DO_JOB_RESUME "R" 330 331 #define TARG_FMT "%s %s ---\n" /* Default format */ 332 #define MESSAGE(fp, gn) \ 333 if (maxJobs != 1) \ 334 (void)fprintf(fp, TARG_FMT, targPrefix, gn->name) 335 336 static sigset_t caught_signals; /* Set of signals we handle */ 337 #if defined(SYSV) 338 #define KILLPG(pid, sig) kill(-(pid), (sig)) 339 #else 340 #define KILLPG(pid, sig) killpg((pid), (sig)) 341 #endif 342 343 static void JobChildSig(int); 344 static void JobContinueSig(int); 345 static Job *JobFindPid(int, int, Boolean); 346 static int JobPrintCommand(void *, void *); 347 static int JobSaveCommand(void *, void *); 348 static void JobClose(Job *); 349 static void JobExec(Job *, char **); 350 static void JobMakeArgv(Job *, char **); 351 static int JobStart(GNode *, int); 352 static char *JobOutput(Job *, char *, char *, int); 353 static void JobDoOutput(Job *, Boolean); 354 static Shell *JobMatchShell(const char *); 355 static void JobInterrupt(int, int) MAKE_ATTR_DEAD; 356 static void JobRestartJobs(void); 357 static void JobTokenAdd(void); 358 static void JobSigLock(sigset_t *); 359 static void JobSigUnlock(sigset_t *); 360 static void JobSigReset(void); 361 362 const char *malloc_options="A"; 363 364 static void 365 job_table_dump(const char *where) 366 { 367 Job *job; 368 369 fprintf(debug_file, "job table @ %s\n", where); 370 for (job = job_table; job < job_table_end; job++) { 371 fprintf(debug_file, "job %d, status %d, flags %d, pid %d\n", 372 (int)(job - job_table), job->job_state, job->flags, job->pid); 373 } 374 } 375 376 /* 377 * JobSigLock/JobSigUnlock 378 * 379 * Signal lock routines to get exclusive access. Currently used to 380 * protect `jobs' and `stoppedJobs' list manipulations. 381 */ 382 static void JobSigLock(sigset_t *omaskp) 383 { 384 if (sigprocmask(SIG_BLOCK, &caught_signals, omaskp) != 0) { 385 Punt("JobSigLock: sigprocmask: %s", strerror(errno)); 386 sigemptyset(omaskp); 387 } 388 } 389 390 static void JobSigUnlock(sigset_t *omaskp) 391 { 392 (void)sigprocmask(SIG_SETMASK, omaskp, NULL); 393 } 394 395 static void 396 JobCreatePipe(Job *job, int minfd) 397 { 398 int i, fd; 399 400 if (pipe(job->jobPipe) == -1) 401 Punt("Cannot create pipe: %s", strerror(errno)); 402 403 /* Set close-on-exec flag for both */ 404 (void)fcntl(job->jobPipe[0], F_SETFD, 1); 405 (void)fcntl(job->jobPipe[1], F_SETFD, 1); 406 407 /* 408 * We mark the input side of the pipe non-blocking; we poll(2) the 409 * pipe when we're waiting for a job token, but we might lose the 410 * race for the token when a new one becomes available, so the read 411 * from the pipe should not block. 412 */ 413 fcntl(job->jobPipe[0], F_SETFL, 414 fcntl(job->jobPipe[0], F_GETFL, 0) | O_NONBLOCK); 415 416 for (i = 0; i < 2; i++) { 417 /* Avoid using low numbered fds */ 418 fd = fcntl(job->jobPipe[i], F_DUPFD, minfd); 419 if (fd != -1) { 420 close(job->jobPipe[i]); 421 job->jobPipe[i] = fd; 422 } 423 } 424 } 425 426 /*- 427 *----------------------------------------------------------------------- 428 * JobCondPassSig -- 429 * Pass a signal to a job 430 * 431 * Input: 432 * signop Signal to send it 433 * 434 * Side Effects: 435 * None, except the job may bite it. 436 * 437 *----------------------------------------------------------------------- 438 */ 439 static void 440 JobCondPassSig(int signo) 441 { 442 Job *job; 443 444 if (DEBUG(JOB)) { 445 (void)fprintf(debug_file, "JobCondPassSig(%d) called.\n", signo); 446 } 447 448 for (job = job_table; job < job_table_end; job++) { 449 if (job->job_state != JOB_ST_RUNNING) 450 continue; 451 if (DEBUG(JOB)) { 452 (void)fprintf(debug_file, 453 "JobCondPassSig passing signal %d to child %d.\n", 454 signo, job->pid); 455 } 456 KILLPG(job->pid, signo); 457 } 458 } 459 460 /*- 461 *----------------------------------------------------------------------- 462 * JobChldSig -- 463 * SIGCHLD handler. 464 * 465 * Input: 466 * signo The signal number we've received 467 * 468 * Results: 469 * None. 470 * 471 * Side Effects: 472 * Sends a token on the child exit pipe to wake us up from 473 * select()/poll(). 474 * 475 *----------------------------------------------------------------------- 476 */ 477 static void 478 JobChildSig(int signo MAKE_ATTR_UNUSED) 479 { 480 write(childExitJob.outPipe, CHILD_EXIT, 1); 481 } 482 483 484 /*- 485 *----------------------------------------------------------------------- 486 * JobContinueSig -- 487 * Resume all stopped jobs. 488 * 489 * Input: 490 * signo The signal number we've received 491 * 492 * Results: 493 * None. 494 * 495 * Side Effects: 496 * Jobs start running again. 497 * 498 *----------------------------------------------------------------------- 499 */ 500 static void 501 JobContinueSig(int signo MAKE_ATTR_UNUSED) 502 { 503 /* 504 * Defer sending to SIGCONT to our stopped children until we return 505 * from the signal handler. 506 */ 507 write(childExitJob.outPipe, DO_JOB_RESUME, 1); 508 } 509 510 /*- 511 *----------------------------------------------------------------------- 512 * JobPassSig -- 513 * Pass a signal on to all jobs, then resend to ourselves. 514 * 515 * Input: 516 * signo The signal number we've received 517 * 518 * Results: 519 * None. 520 * 521 * Side Effects: 522 * We die by the same signal. 523 * 524 *----------------------------------------------------------------------- 525 */ 526 MAKE_ATTR_DEAD static void 527 JobPassSig_int(int signo) 528 { 529 /* Run .INTERRUPT target then exit */ 530 JobInterrupt(TRUE, signo); 531 } 532 533 MAKE_ATTR_DEAD static void 534 JobPassSig_term(int signo) 535 { 536 /* Dont run .INTERRUPT target then exit */ 537 JobInterrupt(FALSE, signo); 538 } 539 540 static void 541 JobPassSig_suspend(int signo) 542 { 543 sigset_t nmask, omask; 544 struct sigaction act; 545 546 /* Suppress job started/continued messages */ 547 make_suspended = 1; 548 549 /* Pass the signal onto every job */ 550 JobCondPassSig(signo); 551 552 /* 553 * Send ourselves the signal now we've given the message to everyone else. 554 * Note we block everything else possible while we're getting the signal. 555 * This ensures that all our jobs get continued when we wake up before 556 * we take any other signal. 557 */ 558 sigfillset(&nmask); 559 sigdelset(&nmask, signo); 560 (void)sigprocmask(SIG_SETMASK, &nmask, &omask); 561 562 act.sa_handler = SIG_DFL; 563 sigemptyset(&act.sa_mask); 564 act.sa_flags = 0; 565 (void)sigaction(signo, &act, NULL); 566 567 if (DEBUG(JOB)) { 568 (void)fprintf(debug_file, 569 "JobPassSig passing signal %d to self.\n", signo); 570 } 571 572 (void)kill(getpid(), signo); 573 574 /* 575 * We've been continued. 576 * 577 * A whole host of signals continue to happen! 578 * SIGCHLD for any processes that actually suspended themselves. 579 * SIGCHLD for any processes that exited while we were alseep. 580 * The SIGCONT that actually caused us to wakeup. 581 * 582 * Since we defer passing the SIGCONT on to our children until 583 * the main processing loop, we can be sure that all the SIGCHLD 584 * events will have happened by then - and that the waitpid() will 585 * collect the child 'suspended' events. 586 * For correct sequencing we just need to ensure we process the 587 * waitpid() before passign on the SIGCONT. 588 * 589 * In any case nothing else is needed here. 590 */ 591 592 /* Restore handler and signal mask */ 593 act.sa_handler = JobPassSig_suspend; 594 (void)sigaction(signo, &act, NULL); 595 (void)sigprocmask(SIG_SETMASK, &omask, NULL); 596 } 597 598 /*- 599 *----------------------------------------------------------------------- 600 * JobFindPid -- 601 * Compare the pid of the job with the given pid and return 0 if they 602 * are equal. This function is called from Job_CatchChildren 603 * to find the job descriptor of the finished job. 604 * 605 * Input: 606 * job job to examine 607 * pid process id desired 608 * 609 * Results: 610 * Job with matching pid 611 * 612 * Side Effects: 613 * None 614 *----------------------------------------------------------------------- 615 */ 616 static Job * 617 JobFindPid(int pid, int status, Boolean isJobs) 618 { 619 Job *job; 620 621 for (job = job_table; job < job_table_end; job++) { 622 if ((job->job_state == status) && job->pid == pid) 623 return job; 624 } 625 if (DEBUG(JOB) && isJobs) 626 job_table_dump("no pid"); 627 return NULL; 628 } 629 630 /*- 631 *----------------------------------------------------------------------- 632 * JobPrintCommand -- 633 * Put out another command for the given job. If the command starts 634 * with an @ or a - we process it specially. In the former case, 635 * so long as the -s and -n flags weren't given to make, we stick 636 * a shell-specific echoOff command in the script. In the latter, 637 * we ignore errors for the entire job, unless the shell has error 638 * control. 639 * If the command is just "..." we take all future commands for this 640 * job to be commands to be executed once the entire graph has been 641 * made and return non-zero to signal that the end of the commands 642 * was reached. These commands are later attached to the postCommands 643 * node and executed by Job_End when all things are done. 644 * This function is called from JobStart via Lst_ForEach. 645 * 646 * Input: 647 * cmdp command string to print 648 * jobp job for which to print it 649 * 650 * Results: 651 * Always 0, unless the command was "..." 652 * 653 * Side Effects: 654 * If the command begins with a '-' and the shell has no error control, 655 * the JOB_IGNERR flag is set in the job descriptor. 656 * If the command is "..." and we're not ignoring such things, 657 * tailCmds is set to the successor node of the cmd. 658 * numCommands is incremented if the command is actually printed. 659 *----------------------------------------------------------------------- 660 */ 661 static int 662 JobPrintCommand(void *cmdp, void *jobp) 663 { 664 Boolean noSpecials; /* true if we shouldn't worry about 665 * inserting special commands into 666 * the input stream. */ 667 Boolean shutUp = FALSE; /* true if we put a no echo command 668 * into the command file */ 669 Boolean errOff = FALSE; /* true if we turned error checking 670 * off before printing the command 671 * and need to turn it back on */ 672 const char *cmdTemplate; /* Template to use when printing the 673 * command */ 674 char *cmdStart; /* Start of expanded command */ 675 char *escCmd = NULL; /* Command with quotes/backticks escaped */ 676 char *cmd = (char *)cmdp; 677 Job *job = (Job *)jobp; 678 char *cp, *tmp; 679 int i, j; 680 681 noSpecials = NoExecute(job->node); 682 683 if (strcmp(cmd, "...") == 0) { 684 job->node->type |= OP_SAVE_CMDS; 685 if ((job->flags & JOB_IGNDOTS) == 0) { 686 job->tailCmds = Lst_Succ(Lst_Member(job->node->commands, 687 cmd)); 688 return 1; 689 } 690 return 0; 691 } 692 693 #define DBPRINTF(fmt, arg) if (DEBUG(JOB)) { \ 694 (void)fprintf(debug_file, fmt, arg); \ 695 } \ 696 (void)fprintf(job->cmdFILE, fmt, arg); \ 697 (void)fflush(job->cmdFILE); 698 699 numCommands += 1; 700 701 cmdStart = cmd = Var_Subst(NULL, cmd, job->node, FALSE); 702 703 cmdTemplate = "%s\n"; 704 705 /* 706 * Check for leading @' and -'s to control echoing and error checking. 707 */ 708 while (*cmd == '@' || *cmd == '-' || (*cmd == '+')) { 709 switch (*cmd) { 710 case '@': 711 shutUp = DEBUG(LOUD) ? FALSE : TRUE; 712 break; 713 case '-': 714 job->flags |= JOB_IGNERR; 715 errOff = TRUE; 716 break; 717 case '+': 718 if (noSpecials) { 719 /* 720 * We're not actually executing anything... 721 * but this one needs to be - use compat mode just for it. 722 */ 723 CompatRunCommand(cmdp, job->node); 724 return 0; 725 } 726 break; 727 } 728 cmd++; 729 } 730 731 while (isspace((unsigned char) *cmd)) 732 cmd++; 733 734 /* 735 * If the shell doesn't have error control the alternate echo'ing will 736 * be done (to avoid showing additional error checking code) 737 * and this will need the characters '$ ` \ "' escaped 738 */ 739 740 if (!commandShell->hasErrCtl) { 741 /* Worst that could happen is every char needs escaping. */ 742 escCmd = bmake_malloc((strlen(cmd) * 2) + 1); 743 for (i = 0, j= 0; cmd[i] != '\0'; i++, j++) { 744 if (cmd[i] == '$' || cmd[i] == '`' || cmd[i] == '\\' || 745 cmd[i] == '"') 746 escCmd[j++] = '\\'; 747 escCmd[j] = cmd[i]; 748 } 749 escCmd[j] = 0; 750 } 751 752 if (shutUp) { 753 if (!(job->flags & JOB_SILENT) && !noSpecials && 754 commandShell->hasEchoCtl) { 755 DBPRINTF("%s\n", commandShell->echoOff); 756 } else { 757 if (commandShell->hasErrCtl) 758 shutUp = FALSE; 759 } 760 } 761 762 if (errOff) { 763 if (!noSpecials) { 764 if (commandShell->hasErrCtl) { 765 /* 766 * we don't want the error-control commands showing 767 * up either, so we turn off echoing while executing 768 * them. We could put another field in the shell 769 * structure to tell JobDoOutput to look for this 770 * string too, but why make it any more complex than 771 * it already is? 772 */ 773 if (!(job->flags & JOB_SILENT) && !shutUp && 774 commandShell->hasEchoCtl) { 775 DBPRINTF("%s\n", commandShell->echoOff); 776 DBPRINTF("%s\n", commandShell->ignErr); 777 DBPRINTF("%s\n", commandShell->echoOn); 778 } else { 779 DBPRINTF("%s\n", commandShell->ignErr); 780 } 781 } else if (commandShell->ignErr && 782 (*commandShell->ignErr != '\0')) 783 { 784 /* 785 * The shell has no error control, so we need to be 786 * weird to get it to ignore any errors from the command. 787 * If echoing is turned on, we turn it off and use the 788 * errCheck template to echo the command. Leave echoing 789 * off so the user doesn't see the weirdness we go through 790 * to ignore errors. Set cmdTemplate to use the weirdness 791 * instead of the simple "%s\n" template. 792 */ 793 if (!(job->flags & JOB_SILENT) && !shutUp) { 794 if (commandShell->hasEchoCtl) { 795 DBPRINTF("%s\n", commandShell->echoOff); 796 } 797 DBPRINTF(commandShell->errCheck, escCmd); 798 shutUp = TRUE; 799 } else { 800 if (!shutUp) { 801 DBPRINTF(commandShell->errCheck, escCmd); 802 } 803 } 804 cmdTemplate = commandShell->ignErr; 805 /* 806 * The error ignoration (hee hee) is already taken care 807 * of by the ignErr template, so pretend error checking 808 * is still on. 809 */ 810 errOff = FALSE; 811 } else { 812 errOff = FALSE; 813 } 814 } else { 815 errOff = FALSE; 816 } 817 } else { 818 819 /* 820 * If errors are being checked and the shell doesn't have error control 821 * but does supply an errOut template, then setup commands to run 822 * through it. 823 */ 824 825 if (!commandShell->hasErrCtl && commandShell->errOut && 826 (*commandShell->errOut != '\0')) { 827 if (!(job->flags & JOB_SILENT) && !shutUp) { 828 if (commandShell->hasEchoCtl) { 829 DBPRINTF("%s\n", commandShell->echoOff); 830 } 831 DBPRINTF(commandShell->errCheck, escCmd); 832 shutUp = TRUE; 833 } 834 /* If it's a comment line or blank, treat as an ignored error */ 835 if ((escCmd[0] == commandShell->commentChar) || 836 (escCmd[0] == 0)) 837 cmdTemplate = commandShell->ignErr; 838 else 839 cmdTemplate = commandShell->errOut; 840 errOff = FALSE; 841 } 842 } 843 844 if (DEBUG(SHELL) && strcmp(shellName, "sh") == 0 && 845 (job->flags & JOB_TRACED) == 0) { 846 DBPRINTF("set -%s\n", "x"); 847 job->flags |= JOB_TRACED; 848 } 849 850 if ((cp = Check_Cwd_Cmd(cmd)) != NULL) { 851 DBPRINTF("test -d %s && ", cp); 852 DBPRINTF("cd %s\n", cp); 853 } 854 855 DBPRINTF(cmdTemplate, cmd); 856 free(cmdStart); 857 if (escCmd) 858 free(escCmd); 859 if (errOff) { 860 /* 861 * If echoing is already off, there's no point in issuing the 862 * echoOff command. Otherwise we issue it and pretend it was on 863 * for the whole command... 864 */ 865 if (!shutUp && !(job->flags & JOB_SILENT) && commandShell->hasEchoCtl){ 866 DBPRINTF("%s\n", commandShell->echoOff); 867 shutUp = TRUE; 868 } 869 DBPRINTF("%s\n", commandShell->errCheck); 870 } 871 if (shutUp && commandShell->hasEchoCtl) { 872 DBPRINTF("%s\n", commandShell->echoOn); 873 } 874 if (cp != NULL) { 875 DBPRINTF("test -d %s && ", cp); 876 DBPRINTF("cd %s\n", Var_Value(".OBJDIR", VAR_GLOBAL, &tmp)); 877 } 878 return 0; 879 } 880 881 /*- 882 *----------------------------------------------------------------------- 883 * JobSaveCommand -- 884 * Save a command to be executed when everything else is done. 885 * Callback function for JobFinish... 886 * 887 * Results: 888 * Always returns 0 889 * 890 * Side Effects: 891 * The command is tacked onto the end of postCommands's commands list. 892 * 893 *----------------------------------------------------------------------- 894 */ 895 static int 896 JobSaveCommand(void *cmd, void *gn) 897 { 898 cmd = Var_Subst(NULL, (char *)cmd, (GNode *)gn, FALSE); 899 (void)Lst_AtEnd(postCommands->commands, cmd); 900 return(0); 901 } 902 903 904 /*- 905 *----------------------------------------------------------------------- 906 * JobClose -- 907 * Called to close both input and output pipes when a job is finished. 908 * 909 * Results: 910 * Nada 911 * 912 * Side Effects: 913 * The file descriptors associated with the job are closed. 914 * 915 *----------------------------------------------------------------------- 916 */ 917 static void 918 JobClose(Job *job) 919 { 920 clearfd(job); 921 (void)close(job->outPipe); 922 job->outPipe = -1; 923 924 JobDoOutput(job, TRUE); 925 (void)close(job->inPipe); 926 job->inPipe = -1; 927 } 928 929 /*- 930 *----------------------------------------------------------------------- 931 * JobFinish -- 932 * Do final processing for the given job including updating 933 * parents and starting new jobs as available/necessary. Note 934 * that we pay no attention to the JOB_IGNERR flag here. 935 * This is because when we're called because of a noexecute flag 936 * or something, jstat.w_status is 0 and when called from 937 * Job_CatchChildren, the status is zeroed if it s/b ignored. 938 * 939 * Input: 940 * job job to finish 941 * status sub-why job went away 942 * 943 * Results: 944 * None 945 * 946 * Side Effects: 947 * Final commands for the job are placed on postCommands. 948 * 949 * If we got an error and are aborting (aborting == ABORT_ERROR) and 950 * the job list is now empty, we are done for the day. 951 * If we recognized an error (errors !=0), we set the aborting flag 952 * to ABORT_ERROR so no more jobs will be started. 953 *----------------------------------------------------------------------- 954 */ 955 /*ARGSUSED*/ 956 static void 957 JobFinish(Job *job, int status) 958 { 959 Boolean done, return_job_token; 960 961 if (DEBUG(JOB)) { 962 fprintf(debug_file, "Jobfinish: %d [%s], status %d\n", 963 job->pid, job->node->name, status); 964 } 965 966 if ((WIFEXITED(status) && 967 (((WEXITSTATUS(status) != 0) && !(job->flags & JOB_IGNERR)))) || 968 WIFSIGNALED(status)) 969 { 970 /* 971 * If it exited non-zero and either we're doing things our 972 * way or we're not ignoring errors, the job is finished. 973 * Similarly, if the shell died because of a signal 974 * the job is also finished. In these 975 * cases, finish out the job's output before printing the exit 976 * status... 977 */ 978 JobClose(job); 979 if (job->cmdFILE != NULL && job->cmdFILE != stdout) { 980 (void)fclose(job->cmdFILE); 981 job->cmdFILE = NULL; 982 } 983 done = TRUE; 984 } else if (WIFEXITED(status)) { 985 /* 986 * Deal with ignored errors in -B mode. We need to print a message 987 * telling of the ignored error as well as setting status.w_status 988 * to 0 so the next command gets run. To do this, we set done to be 989 * TRUE if in -B mode and the job exited non-zero. 990 */ 991 done = WEXITSTATUS(status) != 0; 992 /* 993 * Old comment said: "Note we don't 994 * want to close down any of the streams until we know we're at the 995 * end." 996 * But we do. Otherwise when are we going to print the rest of the 997 * stuff? 998 */ 999 JobClose(job); 1000 } else { 1001 /* 1002 * No need to close things down or anything. 1003 */ 1004 done = FALSE; 1005 } 1006 1007 if (done) { 1008 if (WIFEXITED(status)) { 1009 if (DEBUG(JOB)) { 1010 (void)fprintf(debug_file, "Process %d [%s] exited.\n", 1011 job->pid, job->node->name); 1012 } 1013 if (WEXITSTATUS(status) != 0) { 1014 if (job->node != lastNode) { 1015 MESSAGE(stdout, job->node); 1016 lastNode = job->node; 1017 } 1018 #ifdef USE_META 1019 if (useMeta) { 1020 meta_job_error(job, job->node, job->flags, WEXITSTATUS(status)); 1021 } 1022 #endif 1023 (void)printf("*** [%s] Error code %d%s\n", 1024 job->node->name, 1025 WEXITSTATUS(status), 1026 (job->flags & JOB_IGNERR) ? " (ignored)" : ""); 1027 if (job->flags & JOB_IGNERR) { 1028 status = 0; 1029 } else { 1030 PrintOnError(job->node, NULL); 1031 } 1032 } else if (DEBUG(JOB)) { 1033 if (job->node != lastNode) { 1034 MESSAGE(stdout, job->node); 1035 lastNode = job->node; 1036 } 1037 (void)printf("*** [%s] Completed successfully\n", 1038 job->node->name); 1039 } 1040 } else { 1041 if (job->node != lastNode) { 1042 MESSAGE(stdout, job->node); 1043 lastNode = job->node; 1044 } 1045 (void)printf("*** [%s] Signal %d\n", 1046 job->node->name, WTERMSIG(status)); 1047 } 1048 (void)fflush(stdout); 1049 } 1050 1051 #ifdef USE_META 1052 if (useMeta) { 1053 meta_job_finish(job); 1054 } 1055 #endif 1056 1057 return_job_token = FALSE; 1058 1059 Trace_Log(JOBEND, job); 1060 if (!(job->flags & JOB_SPECIAL)) { 1061 if ((status != 0) || 1062 (aborting == ABORT_ERROR) || 1063 (aborting == ABORT_INTERRUPT)) 1064 return_job_token = TRUE; 1065 } 1066 1067 if ((aborting != ABORT_ERROR) && (aborting != ABORT_INTERRUPT) && (status == 0)) { 1068 /* 1069 * As long as we aren't aborting and the job didn't return a non-zero 1070 * status that we shouldn't ignore, we call Make_Update to update 1071 * the parents. In addition, any saved commands for the node are placed 1072 * on the .END target. 1073 */ 1074 if (job->tailCmds != NULL) { 1075 Lst_ForEachFrom(job->node->commands, job->tailCmds, 1076 JobSaveCommand, 1077 job->node); 1078 } 1079 job->node->made = MADE; 1080 if (!(job->flags & JOB_SPECIAL)) 1081 return_job_token = TRUE; 1082 Make_Update(job->node); 1083 job->job_state = JOB_ST_FREE; 1084 } else if (status != 0) { 1085 errors += 1; 1086 job->job_state = JOB_ST_FREE; 1087 } 1088 1089 /* 1090 * Set aborting if any error. 1091 */ 1092 if (errors && !keepgoing && (aborting != ABORT_INTERRUPT)) { 1093 /* 1094 * If we found any errors in this batch of children and the -k flag 1095 * wasn't given, we set the aborting flag so no more jobs get 1096 * started. 1097 */ 1098 aborting = ABORT_ERROR; 1099 } 1100 1101 if (return_job_token) 1102 Job_TokenReturn(); 1103 1104 if (aborting == ABORT_ERROR && jobTokensRunning == 0) { 1105 /* 1106 * If we are aborting and the job table is now empty, we finish. 1107 */ 1108 Finish(errors); 1109 } 1110 } 1111 1112 /*- 1113 *----------------------------------------------------------------------- 1114 * Job_Touch -- 1115 * Touch the given target. Called by JobStart when the -t flag was 1116 * given 1117 * 1118 * Input: 1119 * gn the node of the file to touch 1120 * silent TRUE if should not print message 1121 * 1122 * Results: 1123 * None 1124 * 1125 * Side Effects: 1126 * The data modification of the file is changed. In addition, if the 1127 * file did not exist, it is created. 1128 *----------------------------------------------------------------------- 1129 */ 1130 void 1131 Job_Touch(GNode *gn, Boolean silent) 1132 { 1133 int streamID; /* ID of stream opened to do the touch */ 1134 struct utimbuf times; /* Times for utime() call */ 1135 1136 if (gn->type & (OP_JOIN|OP_USE|OP_USEBEFORE|OP_EXEC|OP_OPTIONAL| 1137 OP_SPECIAL|OP_PHONY)) { 1138 /* 1139 * .JOIN, .USE, .ZEROTIME and .OPTIONAL targets are "virtual" targets 1140 * and, as such, shouldn't really be created. 1141 */ 1142 return; 1143 } 1144 1145 if (!silent || NoExecute(gn)) { 1146 (void)fprintf(stdout, "touch %s\n", gn->name); 1147 (void)fflush(stdout); 1148 } 1149 1150 if (NoExecute(gn)) { 1151 return; 1152 } 1153 1154 if (gn->type & OP_ARCHV) { 1155 Arch_Touch(gn); 1156 } else if (gn->type & OP_LIB) { 1157 Arch_TouchLib(gn); 1158 } else { 1159 char *file = gn->path ? gn->path : gn->name; 1160 1161 times.actime = times.modtime = now; 1162 if (utime(file, ×) < 0){ 1163 streamID = open(file, O_RDWR | O_CREAT, 0666); 1164 1165 if (streamID >= 0) { 1166 char c; 1167 1168 /* 1169 * Read and write a byte to the file to change the 1170 * modification time, then close the file. 1171 */ 1172 if (read(streamID, &c, 1) == 1) { 1173 (void)lseek(streamID, (off_t)0, SEEK_SET); 1174 (void)write(streamID, &c, 1); 1175 } 1176 1177 (void)close(streamID); 1178 } else { 1179 (void)fprintf(stdout, "*** couldn't touch %s: %s", 1180 file, strerror(errno)); 1181 (void)fflush(stdout); 1182 } 1183 } 1184 } 1185 } 1186 1187 /*- 1188 *----------------------------------------------------------------------- 1189 * Job_CheckCommands -- 1190 * Make sure the given node has all the commands it needs. 1191 * 1192 * Input: 1193 * gn The target whose commands need verifying 1194 * abortProc Function to abort with message 1195 * 1196 * Results: 1197 * TRUE if the commands list is/was ok. 1198 * 1199 * Side Effects: 1200 * The node will have commands from the .DEFAULT rule added to it 1201 * if it needs them. 1202 *----------------------------------------------------------------------- 1203 */ 1204 Boolean 1205 Job_CheckCommands(GNode *gn, void (*abortProc)(const char *, ...)) 1206 { 1207 if (OP_NOP(gn->type) && Lst_IsEmpty(gn->commands) && 1208 ((gn->type & OP_LIB) == 0 || Lst_IsEmpty(gn->children))) { 1209 /* 1210 * No commands. Look for .DEFAULT rule from which we might infer 1211 * commands 1212 */ 1213 if ((DEFAULT != NULL) && !Lst_IsEmpty(DEFAULT->commands) && 1214 (gn->type & OP_SPECIAL) == 0) { 1215 char *p1; 1216 /* 1217 * Make only looks for a .DEFAULT if the node was never the 1218 * target of an operator, so that's what we do too. If 1219 * a .DEFAULT was given, we substitute its commands for gn's 1220 * commands and set the IMPSRC variable to be the target's name 1221 * The DEFAULT node acts like a transformation rule, in that 1222 * gn also inherits any attributes or sources attached to 1223 * .DEFAULT itself. 1224 */ 1225 Make_HandleUse(DEFAULT, gn); 1226 Var_Set(IMPSRC, Var_Value(TARGET, gn, &p1), gn, 0); 1227 if (p1) 1228 free(p1); 1229 } else if (Dir_MTime(gn, 0) == 0 && (gn->type & OP_SPECIAL) == 0) { 1230 /* 1231 * The node wasn't the target of an operator we have no .DEFAULT 1232 * rule to go on and the target doesn't already exist. There's 1233 * nothing more we can do for this branch. If the -k flag wasn't 1234 * given, we stop in our tracks, otherwise we just don't update 1235 * this node's parents so they never get examined. 1236 */ 1237 static const char msg[] = ": don't know how to make"; 1238 1239 if (gn->flags & FROM_DEPEND) { 1240 fprintf(stdout, "%s: ignoring stale %s for %s\n", 1241 progname, makeDependfile, gn->name); 1242 return TRUE; 1243 } 1244 1245 if (gn->type & OP_OPTIONAL) { 1246 (void)fprintf(stdout, "%s%s %s (ignored)\n", progname, 1247 msg, gn->name); 1248 (void)fflush(stdout); 1249 } else if (keepgoing) { 1250 (void)fprintf(stdout, "%s%s %s (continuing)\n", progname, 1251 msg, gn->name); 1252 (void)fflush(stdout); 1253 return FALSE; 1254 } else { 1255 (*abortProc)("%s%s %s. Stop", progname, msg, gn->name); 1256 return FALSE; 1257 } 1258 } 1259 } 1260 return TRUE; 1261 } 1262 1263 /*- 1264 *----------------------------------------------------------------------- 1265 * JobExec -- 1266 * Execute the shell for the given job. Called from JobStart 1267 * 1268 * Input: 1269 * job Job to execute 1270 * 1271 * Results: 1272 * None. 1273 * 1274 * Side Effects: 1275 * A shell is executed, outputs is altered and the Job structure added 1276 * to the job table. 1277 * 1278 *----------------------------------------------------------------------- 1279 */ 1280 static void 1281 JobExec(Job *job, char **argv) 1282 { 1283 int cpid; /* ID of new child */ 1284 sigset_t mask; 1285 1286 job->flags &= ~JOB_TRACED; 1287 1288 if (DEBUG(JOB)) { 1289 int i; 1290 1291 (void)fprintf(debug_file, "Running %s %sly\n", job->node->name, "local"); 1292 (void)fprintf(debug_file, "\tCommand: "); 1293 for (i = 0; argv[i] != NULL; i++) { 1294 (void)fprintf(debug_file, "%s ", argv[i]); 1295 } 1296 (void)fprintf(debug_file, "\n"); 1297 } 1298 1299 /* 1300 * Some jobs produce no output and it's disconcerting to have 1301 * no feedback of their running (since they produce no output, the 1302 * banner with their name in it never appears). This is an attempt to 1303 * provide that feedback, even if nothing follows it. 1304 */ 1305 if ((lastNode != job->node) && !(job->flags & JOB_SILENT)) { 1306 MESSAGE(stdout, job->node); 1307 lastNode = job->node; 1308 } 1309 1310 /* No interruptions until this job is on the `jobs' list */ 1311 JobSigLock(&mask); 1312 1313 /* Pre-emptively mark job running, pid still zero though */ 1314 job->job_state = JOB_ST_RUNNING; 1315 1316 cpid = vFork(); 1317 if (cpid == -1) 1318 Punt("Cannot vfork: %s", strerror(errno)); 1319 1320 if (cpid == 0) { 1321 /* Child */ 1322 sigset_t tmask; 1323 1324 #ifdef USE_META 1325 if (useMeta) { 1326 meta_job_child(job); 1327 } 1328 #endif 1329 /* 1330 * Reset all signal handlers; this is necessary because we also 1331 * need to unblock signals before we exec(2). 1332 */ 1333 JobSigReset(); 1334 1335 /* Now unblock signals */ 1336 sigemptyset(&tmask); 1337 JobSigUnlock(&tmask); 1338 1339 /* 1340 * Must duplicate the input stream down to the child's input and 1341 * reset it to the beginning (again). Since the stream was marked 1342 * close-on-exec, we must clear that bit in the new input. 1343 */ 1344 if (dup2(FILENO(job->cmdFILE), 0) == -1) { 1345 execError("dup2", "job->cmdFILE"); 1346 _exit(1); 1347 } 1348 (void)fcntl(0, F_SETFD, 0); 1349 (void)lseek(0, (off_t)0, SEEK_SET); 1350 1351 if (job->node->type & OP_MAKE) { 1352 /* 1353 * Pass job token pipe to submakes. 1354 */ 1355 fcntl(tokenWaitJob.inPipe, F_SETFD, 0); 1356 fcntl(tokenWaitJob.outPipe, F_SETFD, 0); 1357 } 1358 1359 /* 1360 * Set up the child's output to be routed through the pipe 1361 * we've created for it. 1362 */ 1363 if (dup2(job->outPipe, 1) == -1) { 1364 execError("dup2", "job->outPipe"); 1365 _exit(1); 1366 } 1367 /* 1368 * The output channels are marked close on exec. This bit was 1369 * duplicated by the dup2(on some systems), so we have to clear 1370 * it before routing the shell's error output to the same place as 1371 * its standard output. 1372 */ 1373 (void)fcntl(1, F_SETFD, 0); 1374 if (dup2(1, 2) == -1) { 1375 execError("dup2", "1, 2"); 1376 _exit(1); 1377 } 1378 1379 /* 1380 * We want to switch the child into a different process family so 1381 * we can kill it and all its descendants in one fell swoop, 1382 * by killing its process family, but not commit suicide. 1383 */ 1384 #if defined(SYSV) || defined(__minix) 1385 /* XXX: dsl - I'm sure this should be setpgrp()... */ 1386 (void)setsid(); 1387 #else 1388 (void)setpgid(0, getpid()); 1389 #endif 1390 1391 Var_ExportVars(); 1392 1393 (void)execv(shellPath, argv); 1394 execError("exec", shellPath); 1395 _exit(1); 1396 } 1397 1398 /* Parent, continuing after the child exec */ 1399 job->pid = cpid; 1400 1401 Trace_Log(JOBSTART, job); 1402 1403 /* 1404 * Set the current position in the buffer to the beginning 1405 * and mark another stream to watch in the outputs mask 1406 */ 1407 job->curPos = 0; 1408 1409 watchfd(job); 1410 1411 if (job->cmdFILE != NULL && job->cmdFILE != stdout) { 1412 (void)fclose(job->cmdFILE); 1413 job->cmdFILE = NULL; 1414 } 1415 1416 /* 1417 * Now the job is actually running, add it to the table. 1418 */ 1419 if (DEBUG(JOB)) { 1420 fprintf(debug_file, "JobExec(%s): pid %d added to jobs table\n", 1421 job->node->name, job->pid); 1422 job_table_dump("job started"); 1423 } 1424 JobSigUnlock(&mask); 1425 } 1426 1427 /*- 1428 *----------------------------------------------------------------------- 1429 * JobMakeArgv -- 1430 * Create the argv needed to execute the shell for a given job. 1431 * 1432 * 1433 * Results: 1434 * 1435 * Side Effects: 1436 * 1437 *----------------------------------------------------------------------- 1438 */ 1439 static void 1440 JobMakeArgv(Job *job, char **argv) 1441 { 1442 int argc; 1443 static char args[10]; /* For merged arguments */ 1444 1445 argv[0] = UNCONST(shellName); 1446 argc = 1; 1447 1448 if ((commandShell->exit && (*commandShell->exit != '-')) || 1449 (commandShell->echo && (*commandShell->echo != '-'))) 1450 { 1451 /* 1452 * At least one of the flags doesn't have a minus before it, so 1453 * merge them together. Have to do this because the *(&(@*#*&#$# 1454 * Bourne shell thinks its second argument is a file to source. 1455 * Grrrr. Note the ten-character limitation on the combined arguments. 1456 */ 1457 (void)snprintf(args, sizeof(args), "-%s%s", 1458 ((job->flags & JOB_IGNERR) ? "" : 1459 (commandShell->exit ? commandShell->exit : "")), 1460 ((job->flags & JOB_SILENT) ? "" : 1461 (commandShell->echo ? commandShell->echo : ""))); 1462 1463 if (args[1]) { 1464 argv[argc] = args; 1465 argc++; 1466 } 1467 } else { 1468 if (!(job->flags & JOB_IGNERR) && commandShell->exit) { 1469 argv[argc] = UNCONST(commandShell->exit); 1470 argc++; 1471 } 1472 if (!(job->flags & JOB_SILENT) && commandShell->echo) { 1473 argv[argc] = UNCONST(commandShell->echo); 1474 argc++; 1475 } 1476 } 1477 argv[argc] = NULL; 1478 } 1479 1480 /*- 1481 *----------------------------------------------------------------------- 1482 * JobStart -- 1483 * Start a target-creation process going for the target described 1484 * by the graph node gn. 1485 * 1486 * Input: 1487 * gn target to create 1488 * flags flags for the job to override normal ones. 1489 * e.g. JOB_SPECIAL or JOB_IGNDOTS 1490 * previous The previous Job structure for this node, if any. 1491 * 1492 * Results: 1493 * JOB_ERROR if there was an error in the commands, JOB_FINISHED 1494 * if there isn't actually anything left to do for the job and 1495 * JOB_RUNNING if the job has been started. 1496 * 1497 * Side Effects: 1498 * A new Job node is created and added to the list of running 1499 * jobs. PMake is forked and a child shell created. 1500 * 1501 * NB: I'm fairly sure that this code is never called with JOB_SPECIAL set 1502 * JOB_IGNDOTS is never set (dsl) 1503 * Also the return value is ignored by everyone. 1504 *----------------------------------------------------------------------- 1505 */ 1506 static int 1507 JobStart(GNode *gn, int flags) 1508 { 1509 Job *job; /* new job descriptor */ 1510 char *argv[10]; /* Argument vector to shell */ 1511 Boolean cmdsOK; /* true if the nodes commands were all right */ 1512 Boolean noExec; /* Set true if we decide not to run the job */ 1513 int tfd; /* File descriptor to the temp file */ 1514 1515 for (job = job_table; job < job_table_end; job++) { 1516 if (job->job_state == JOB_ST_FREE) 1517 break; 1518 } 1519 if (job >= job_table_end) 1520 Punt("JobStart no job slots vacant"); 1521 1522 memset(job, 0, sizeof *job); 1523 job->job_state = JOB_ST_SETUP; 1524 if (gn->type & OP_SPECIAL) 1525 flags |= JOB_SPECIAL; 1526 1527 job->node = gn; 1528 job->tailCmds = NULL; 1529 1530 /* 1531 * Set the initial value of the flags for this job based on the global 1532 * ones and the node's attributes... Any flags supplied by the caller 1533 * are also added to the field. 1534 */ 1535 job->flags = 0; 1536 if (Targ_Ignore(gn)) { 1537 job->flags |= JOB_IGNERR; 1538 } 1539 if (Targ_Silent(gn)) { 1540 job->flags |= JOB_SILENT; 1541 } 1542 job->flags |= flags; 1543 1544 /* 1545 * Check the commands now so any attributes from .DEFAULT have a chance 1546 * to migrate to the node 1547 */ 1548 cmdsOK = Job_CheckCommands(gn, Error); 1549 1550 job->inPollfd = NULL; 1551 /* 1552 * If the -n flag wasn't given, we open up OUR (not the child's) 1553 * temporary file to stuff commands in it. The thing is rd/wr so we don't 1554 * need to reopen it to feed it to the shell. If the -n flag *was* given, 1555 * we just set the file to be stdout. Cute, huh? 1556 */ 1557 if (((gn->type & OP_MAKE) && !(noRecursiveExecute)) || 1558 (!noExecute && !touchFlag)) { 1559 /* 1560 * tfile is the name of a file into which all shell commands are 1561 * put. It is removed before the child shell is executed, unless 1562 * DEBUG(SCRIPT) is set. 1563 */ 1564 char *tfile; 1565 sigset_t mask; 1566 /* 1567 * We're serious here, but if the commands were bogus, we're 1568 * also dead... 1569 */ 1570 if (!cmdsOK) { 1571 PrintOnError(gn, NULL); /* provide some clue */ 1572 DieHorribly(); 1573 } 1574 1575 JobSigLock(&mask); 1576 tfd = mkTempFile(TMPPAT, &tfile); 1577 if (!DEBUG(SCRIPT)) 1578 (void)eunlink(tfile); 1579 JobSigUnlock(&mask); 1580 1581 job->cmdFILE = fdopen(tfd, "w+"); 1582 if (job->cmdFILE == NULL) { 1583 Punt("Could not fdopen %s", tfile); 1584 } 1585 (void)fcntl(FILENO(job->cmdFILE), F_SETFD, 1); 1586 /* 1587 * Send the commands to the command file, flush all its buffers then 1588 * rewind and remove the thing. 1589 */ 1590 noExec = FALSE; 1591 1592 #ifdef USE_META 1593 if (useMeta) { 1594 meta_job_start(job, gn); 1595 if (Targ_Silent(gn)) { /* might have changed */ 1596 job->flags |= JOB_SILENT; 1597 } 1598 } 1599 #endif 1600 /* 1601 * We can do all the commands at once. hooray for sanity 1602 */ 1603 numCommands = 0; 1604 Lst_ForEach(gn->commands, JobPrintCommand, job); 1605 1606 /* 1607 * If we didn't print out any commands to the shell script, 1608 * there's not much point in executing the shell, is there? 1609 */ 1610 if (numCommands == 0) { 1611 noExec = TRUE; 1612 } 1613 1614 free(tfile); 1615 } else if (NoExecute(gn)) { 1616 /* 1617 * Not executing anything -- just print all the commands to stdout 1618 * in one fell swoop. This will still set up job->tailCmds correctly. 1619 */ 1620 if (lastNode != gn) { 1621 MESSAGE(stdout, gn); 1622 lastNode = gn; 1623 } 1624 job->cmdFILE = stdout; 1625 /* 1626 * Only print the commands if they're ok, but don't die if they're 1627 * not -- just let the user know they're bad and keep going. It 1628 * doesn't do any harm in this case and may do some good. 1629 */ 1630 if (cmdsOK) { 1631 Lst_ForEach(gn->commands, JobPrintCommand, job); 1632 } 1633 /* 1634 * Don't execute the shell, thank you. 1635 */ 1636 noExec = TRUE; 1637 } else { 1638 /* 1639 * Just touch the target and note that no shell should be executed. 1640 * Set cmdFILE to stdout to make life easier. Check the commands, too, 1641 * but don't die if they're no good -- it does no harm to keep working 1642 * up the graph. 1643 */ 1644 job->cmdFILE = stdout; 1645 Job_Touch(gn, job->flags&JOB_SILENT); 1646 noExec = TRUE; 1647 } 1648 /* Just in case it isn't already... */ 1649 (void)fflush(job->cmdFILE); 1650 1651 /* 1652 * If we're not supposed to execute a shell, don't. 1653 */ 1654 if (noExec) { 1655 if (!(job->flags & JOB_SPECIAL)) 1656 Job_TokenReturn(); 1657 /* 1658 * Unlink and close the command file if we opened one 1659 */ 1660 if (job->cmdFILE != stdout) { 1661 if (job->cmdFILE != NULL) { 1662 (void)fclose(job->cmdFILE); 1663 job->cmdFILE = NULL; 1664 } 1665 } 1666 1667 /* 1668 * We only want to work our way up the graph if we aren't here because 1669 * the commands for the job were no good. 1670 */ 1671 if (cmdsOK && aborting == 0) { 1672 if (job->tailCmds != NULL) { 1673 Lst_ForEachFrom(job->node->commands, job->tailCmds, 1674 JobSaveCommand, 1675 job->node); 1676 } 1677 job->node->made = MADE; 1678 Make_Update(job->node); 1679 } 1680 job->job_state = JOB_ST_FREE; 1681 return cmdsOK ? JOB_FINISHED : JOB_ERROR; 1682 } 1683 1684 /* 1685 * Set up the control arguments to the shell. This is based on the flags 1686 * set earlier for this job. 1687 */ 1688 JobMakeArgv(job, argv); 1689 1690 /* Create the pipe by which we'll get the shell's output. */ 1691 JobCreatePipe(job, 3); 1692 1693 JobExec(job, argv); 1694 return(JOB_RUNNING); 1695 } 1696 1697 static char * 1698 JobOutput(Job *job, char *cp, char *endp, int msg) 1699 { 1700 char *ecp; 1701 1702 if (commandShell->noPrint) { 1703 ecp = Str_FindSubstring(cp, commandShell->noPrint); 1704 while (ecp != NULL) { 1705 if (cp != ecp) { 1706 *ecp = '\0'; 1707 if (!beSilent && msg && job->node != lastNode) { 1708 MESSAGE(stdout, job->node); 1709 lastNode = job->node; 1710 } 1711 /* 1712 * The only way there wouldn't be a newline after 1713 * this line is if it were the last in the buffer. 1714 * however, since the non-printable comes after it, 1715 * there must be a newline, so we don't print one. 1716 */ 1717 (void)fprintf(stdout, "%s", cp); 1718 (void)fflush(stdout); 1719 } 1720 cp = ecp + commandShell->noPLen; 1721 if (cp != endp) { 1722 /* 1723 * Still more to print, look again after skipping 1724 * the whitespace following the non-printable 1725 * command.... 1726 */ 1727 cp++; 1728 while (*cp == ' ' || *cp == '\t' || *cp == '\n') { 1729 cp++; 1730 } 1731 ecp = Str_FindSubstring(cp, commandShell->noPrint); 1732 } else { 1733 return cp; 1734 } 1735 } 1736 } 1737 return cp; 1738 } 1739 1740 /*- 1741 *----------------------------------------------------------------------- 1742 * JobDoOutput -- 1743 * This function is called at different times depending on 1744 * whether the user has specified that output is to be collected 1745 * via pipes or temporary files. In the former case, we are called 1746 * whenever there is something to read on the pipe. We collect more 1747 * output from the given job and store it in the job's outBuf. If 1748 * this makes up a line, we print it tagged by the job's identifier, 1749 * as necessary. 1750 * If output has been collected in a temporary file, we open the 1751 * file and read it line by line, transfering it to our own 1752 * output channel until the file is empty. At which point we 1753 * remove the temporary file. 1754 * In both cases, however, we keep our figurative eye out for the 1755 * 'noPrint' line for the shell from which the output came. If 1756 * we recognize a line, we don't print it. If the command is not 1757 * alone on the line (the character after it is not \0 or \n), we 1758 * do print whatever follows it. 1759 * 1760 * Input: 1761 * job the job whose output needs printing 1762 * finish TRUE if this is the last time we'll be called 1763 * for this job 1764 * 1765 * Results: 1766 * None 1767 * 1768 * Side Effects: 1769 * curPos may be shifted as may the contents of outBuf. 1770 *----------------------------------------------------------------------- 1771 */ 1772 STATIC void 1773 JobDoOutput(Job *job, Boolean finish) 1774 { 1775 Boolean gotNL = FALSE; /* true if got a newline */ 1776 Boolean fbuf; /* true if our buffer filled up */ 1777 int nr; /* number of bytes read */ 1778 int i; /* auxiliary index into outBuf */ 1779 int max; /* limit for i (end of current data) */ 1780 int nRead; /* (Temporary) number of bytes read */ 1781 1782 /* 1783 * Read as many bytes as will fit in the buffer. 1784 */ 1785 end_loop: 1786 gotNL = FALSE; 1787 fbuf = FALSE; 1788 1789 nRead = read(job->inPipe, &job->outBuf[job->curPos], 1790 JOB_BUFSIZE - job->curPos); 1791 if (nRead < 0) { 1792 if (errno == EAGAIN) 1793 return; 1794 if (DEBUG(JOB)) { 1795 perror("JobDoOutput(piperead)"); 1796 } 1797 nr = 0; 1798 } else { 1799 nr = nRead; 1800 } 1801 1802 /* 1803 * If we hit the end-of-file (the job is dead), we must flush its 1804 * remaining output, so pretend we read a newline if there's any 1805 * output remaining in the buffer. 1806 * Also clear the 'finish' flag so we stop looping. 1807 */ 1808 if ((nr == 0) && (job->curPos != 0)) { 1809 job->outBuf[job->curPos] = '\n'; 1810 nr = 1; 1811 finish = FALSE; 1812 } else if (nr == 0) { 1813 finish = FALSE; 1814 } 1815 1816 /* 1817 * Look for the last newline in the bytes we just got. If there is 1818 * one, break out of the loop with 'i' as its index and gotNL set 1819 * TRUE. 1820 */ 1821 max = job->curPos + nr; 1822 for (i = job->curPos + nr - 1; i >= job->curPos; i--) { 1823 if (job->outBuf[i] == '\n') { 1824 gotNL = TRUE; 1825 break; 1826 } else if (job->outBuf[i] == '\0') { 1827 /* 1828 * Why? 1829 */ 1830 job->outBuf[i] = ' '; 1831 } 1832 } 1833 1834 if (!gotNL) { 1835 job->curPos += nr; 1836 if (job->curPos == JOB_BUFSIZE) { 1837 /* 1838 * If we've run out of buffer space, we have no choice 1839 * but to print the stuff. sigh. 1840 */ 1841 fbuf = TRUE; 1842 i = job->curPos; 1843 } 1844 } 1845 if (gotNL || fbuf) { 1846 /* 1847 * Need to send the output to the screen. Null terminate it 1848 * first, overwriting the newline character if there was one. 1849 * So long as the line isn't one we should filter (according 1850 * to the shell description), we print the line, preceded 1851 * by a target banner if this target isn't the same as the 1852 * one for which we last printed something. 1853 * The rest of the data in the buffer are then shifted down 1854 * to the start of the buffer and curPos is set accordingly. 1855 */ 1856 job->outBuf[i] = '\0'; 1857 if (i >= job->curPos) { 1858 char *cp; 1859 1860 cp = JobOutput(job, job->outBuf, &job->outBuf[i], FALSE); 1861 1862 /* 1863 * There's still more in that thar buffer. This time, though, 1864 * we know there's no newline at the end, so we add one of 1865 * our own free will. 1866 */ 1867 if (*cp != '\0') { 1868 if (!beSilent && job->node != lastNode) { 1869 MESSAGE(stdout, job->node); 1870 lastNode = job->node; 1871 } 1872 #ifdef USE_META 1873 if (useMeta) { 1874 meta_job_output(job, cp, gotNL ? "\n" : ""); 1875 } 1876 #endif 1877 (void)fprintf(stdout, "%s%s", cp, gotNL ? "\n" : ""); 1878 (void)fflush(stdout); 1879 } 1880 } 1881 if (i < max - 1) { 1882 /* shift the remaining characters down */ 1883 (void)memcpy(job->outBuf, &job->outBuf[i + 1], max - (i + 1)); 1884 job->curPos = max - (i + 1); 1885 1886 } else { 1887 /* 1888 * We have written everything out, so we just start over 1889 * from the start of the buffer. No copying. No nothing. 1890 */ 1891 job->curPos = 0; 1892 } 1893 } 1894 if (finish) { 1895 /* 1896 * If the finish flag is true, we must loop until we hit 1897 * end-of-file on the pipe. This is guaranteed to happen 1898 * eventually since the other end of the pipe is now closed 1899 * (we closed it explicitly and the child has exited). When 1900 * we do get an EOF, finish will be set FALSE and we'll fall 1901 * through and out. 1902 */ 1903 goto end_loop; 1904 } 1905 } 1906 1907 static void 1908 JobRun(GNode *targ) 1909 { 1910 #ifdef notyet 1911 /* 1912 * Unfortunately it is too complicated to run .BEGIN, .END, 1913 * and .INTERRUPT job in the parallel job module. This has 1914 * the nice side effect that it avoids a lot of other problems. 1915 */ 1916 Lst lst = Lst_Init(FALSE); 1917 Lst_AtEnd(lst, targ); 1918 (void)Make_Run(lst); 1919 Lst_Destroy(lst, NULL); 1920 JobStart(targ, JOB_SPECIAL); 1921 while (jobTokensRunning) { 1922 Job_CatchOutput(); 1923 } 1924 #else 1925 Compat_Make(targ, targ); 1926 if (targ->made == ERROR) { 1927 PrintOnError(targ, "\n\nStop."); 1928 exit(1); 1929 } 1930 #endif 1931 } 1932 1933 /*- 1934 *----------------------------------------------------------------------- 1935 * Job_CatchChildren -- 1936 * Handle the exit of a child. Called from Make_Make. 1937 * 1938 * Input: 1939 * block TRUE if should block on the wait 1940 * 1941 * Results: 1942 * none. 1943 * 1944 * Side Effects: 1945 * The job descriptor is removed from the list of children. 1946 * 1947 * Notes: 1948 * We do waits, blocking or not, according to the wisdom of our 1949 * caller, until there are no more children to report. For each 1950 * job, call JobFinish to finish things off. 1951 * 1952 *----------------------------------------------------------------------- 1953 */ 1954 1955 void 1956 Job_CatchChildren(void) 1957 { 1958 int pid; /* pid of dead child */ 1959 int status; /* Exit/termination status */ 1960 1961 /* 1962 * Don't even bother if we know there's no one around. 1963 */ 1964 if (jobTokensRunning == 0) 1965 return; 1966 1967 while ((pid = waitpid((pid_t) -1, &status, WNOHANG | WUNTRACED)) > 0) { 1968 if (DEBUG(JOB)) { 1969 (void)fprintf(debug_file, "Process %d exited/stopped status %x.\n", pid, 1970 status); 1971 } 1972 JobReapChild(pid, status, TRUE); 1973 } 1974 } 1975 1976 /* 1977 * It is possible that wait[pid]() was called from elsewhere, 1978 * this lets us reap jobs regardless. 1979 */ 1980 void 1981 JobReapChild(pid_t pid, int status, Boolean isJobs) 1982 { 1983 Job *job; /* job descriptor for dead child */ 1984 1985 /* 1986 * Don't even bother if we know there's no one around. 1987 */ 1988 if (jobTokensRunning == 0) 1989 return; 1990 1991 job = JobFindPid(pid, JOB_ST_RUNNING, isJobs); 1992 if (job == NULL) { 1993 if (isJobs) { 1994 if (!lurking_children) 1995 Error("Child (%d) status %x not in table?", pid, status); 1996 } 1997 return; /* not ours */ 1998 } 1999 if (WIFSTOPPED(status)) { 2000 if (DEBUG(JOB)) { 2001 (void)fprintf(debug_file, "Process %d (%s) stopped.\n", 2002 job->pid, job->node->name); 2003 } 2004 if (!make_suspended) { 2005 switch (WSTOPSIG(status)) { 2006 case SIGTSTP: 2007 (void)printf("*** [%s] Suspended\n", job->node->name); 2008 break; 2009 case SIGSTOP: 2010 (void)printf("*** [%s] Stopped\n", job->node->name); 2011 break; 2012 default: 2013 (void)printf("*** [%s] Stopped -- signal %d\n", 2014 job->node->name, WSTOPSIG(status)); 2015 } 2016 job->job_suspended = 1; 2017 } 2018 (void)fflush(stdout); 2019 return; 2020 } 2021 2022 job->job_state = JOB_ST_FINISHED; 2023 job->exit_status = status; 2024 2025 JobFinish(job, status); 2026 } 2027 2028 /*- 2029 *----------------------------------------------------------------------- 2030 * Job_CatchOutput -- 2031 * Catch the output from our children, if we're using 2032 * pipes do so. Otherwise just block time until we get a 2033 * signal(most likely a SIGCHLD) since there's no point in 2034 * just spinning when there's nothing to do and the reaping 2035 * of a child can wait for a while. 2036 * 2037 * Results: 2038 * None 2039 * 2040 * Side Effects: 2041 * Output is read from pipes if we're piping. 2042 * ----------------------------------------------------------------------- 2043 */ 2044 void 2045 Job_CatchOutput(void) 2046 { 2047 int nready; 2048 Job *job; 2049 int i; 2050 2051 (void)fflush(stdout); 2052 2053 /* The first fd in the list is the job token pipe */ 2054 nready = poll(fds + 1 - wantToken, nfds - 1 + wantToken, POLL_MSEC); 2055 2056 if (nready < 0 || readyfd(&childExitJob)) { 2057 char token = 0; 2058 nready -= 1; 2059 (void)read(childExitJob.inPipe, &token, 1); 2060 if (token == DO_JOB_RESUME[0]) 2061 /* Complete relay requested from our SIGCONT handler */ 2062 JobRestartJobs(); 2063 Job_CatchChildren(); 2064 } 2065 2066 if (nready <= 0) 2067 return; 2068 2069 if (wantToken && readyfd(&tokenWaitJob)) 2070 nready--; 2071 2072 for (i = 2; i < nfds; i++) { 2073 if (!fds[i].revents) 2074 continue; 2075 job = jobfds[i]; 2076 if (job->job_state != JOB_ST_RUNNING) 2077 continue; 2078 JobDoOutput(job, FALSE); 2079 } 2080 } 2081 2082 /*- 2083 *----------------------------------------------------------------------- 2084 * Job_Make -- 2085 * Start the creation of a target. Basically a front-end for 2086 * JobStart used by the Make module. 2087 * 2088 * Results: 2089 * None. 2090 * 2091 * Side Effects: 2092 * Another job is started. 2093 * 2094 *----------------------------------------------------------------------- 2095 */ 2096 void 2097 Job_Make(GNode *gn) 2098 { 2099 (void)JobStart(gn, 0); 2100 } 2101 2102 void 2103 Shell_Init(void) 2104 { 2105 if (shellPath == NULL) { 2106 /* 2107 * We are using the default shell, which may be an absolute 2108 * path if DEFSHELL_CUSTOM is defined. 2109 */ 2110 shellName = commandShell->name; 2111 #ifdef DEFSHELL_CUSTOM 2112 if (*shellName == '/') { 2113 shellPath = shellName; 2114 shellName = strrchr(shellPath, '/'); 2115 shellName++; 2116 } else 2117 #endif 2118 shellPath = str_concat(_PATH_DEFSHELLDIR, shellName, STR_ADDSLASH); 2119 } 2120 if (commandShell->exit == NULL) { 2121 commandShell->exit = ""; 2122 } 2123 if (commandShell->echo == NULL) { 2124 commandShell->echo = ""; 2125 } 2126 } 2127 2128 /*- 2129 * Returns the string literal that is used in the current command shell 2130 * to produce a newline character. 2131 */ 2132 const char * 2133 Shell_GetNewline(void) 2134 { 2135 2136 return commandShell->newline; 2137 } 2138 2139 void 2140 Job_SetPrefix(void) 2141 { 2142 2143 if (targPrefix) { 2144 free(targPrefix); 2145 } else if (!Var_Exists(MAKE_JOB_PREFIX, VAR_GLOBAL)) { 2146 Var_Set(MAKE_JOB_PREFIX, "---", VAR_GLOBAL, 0); 2147 } 2148 2149 targPrefix = Var_Subst(NULL, "${" MAKE_JOB_PREFIX "}", VAR_GLOBAL, 0); 2150 } 2151 2152 /*- 2153 *----------------------------------------------------------------------- 2154 * Job_Init -- 2155 * Initialize the process module 2156 * 2157 * Input: 2158 * 2159 * Results: 2160 * none 2161 * 2162 * Side Effects: 2163 * lists and counters are initialized 2164 *----------------------------------------------------------------------- 2165 */ 2166 void 2167 Job_Init(void) 2168 { 2169 GNode *begin; /* node for commands to do at the very start */ 2170 2171 /* Allocate space for all the job info */ 2172 job_table = bmake_malloc(maxJobs * sizeof *job_table); 2173 memset(job_table, 0, maxJobs * sizeof *job_table); 2174 job_table_end = job_table + maxJobs; 2175 wantToken = 0; 2176 2177 aborting = 0; 2178 errors = 0; 2179 2180 lastNode = NULL; 2181 2182 /* 2183 * There is a non-zero chance that we already have children. 2184 * eg after 'make -f- <<EOF' 2185 * Since their termination causes a 'Child (pid) not in table' message, 2186 * Collect the status of any that are already dead, and suppress the 2187 * error message if there are any undead ones. 2188 */ 2189 for (;;) { 2190 int rval, status; 2191 rval = waitpid((pid_t) -1, &status, WNOHANG); 2192 if (rval > 0) 2193 continue; 2194 if (rval == 0) 2195 lurking_children = 1; 2196 break; 2197 } 2198 2199 Shell_Init(); 2200 2201 JobCreatePipe(&childExitJob, 3); 2202 2203 /* We can only need to wait for tokens, children and output from each job */ 2204 fds = bmake_malloc(sizeof (*fds) * (2 + maxJobs)); 2205 jobfds = bmake_malloc(sizeof (*jobfds) * (2 + maxJobs)); 2206 2207 /* These are permanent entries and take slots 0 and 1 */ 2208 watchfd(&tokenWaitJob); 2209 watchfd(&childExitJob); 2210 2211 sigemptyset(&caught_signals); 2212 /* 2213 * Install a SIGCHLD handler. 2214 */ 2215 (void)bmake_signal(SIGCHLD, JobChildSig); 2216 sigaddset(&caught_signals, SIGCHLD); 2217 2218 #define ADDSIG(s,h) \ 2219 if (bmake_signal(s, SIG_IGN) != SIG_IGN) { \ 2220 sigaddset(&caught_signals, s); \ 2221 (void)bmake_signal(s, h); \ 2222 } 2223 2224 /* 2225 * Catch the four signals that POSIX specifies if they aren't ignored. 2226 * JobPassSig will take care of calling JobInterrupt if appropriate. 2227 */ 2228 ADDSIG(SIGINT, JobPassSig_int) 2229 ADDSIG(SIGHUP, JobPassSig_term) 2230 ADDSIG(SIGTERM, JobPassSig_term) 2231 ADDSIG(SIGQUIT, JobPassSig_term) 2232 2233 /* 2234 * There are additional signals that need to be caught and passed if 2235 * either the export system wants to be told directly of signals or if 2236 * we're giving each job its own process group (since then it won't get 2237 * signals from the terminal driver as we own the terminal) 2238 */ 2239 ADDSIG(SIGTSTP, JobPassSig_suspend) 2240 ADDSIG(SIGTTOU, JobPassSig_suspend) 2241 ADDSIG(SIGTTIN, JobPassSig_suspend) 2242 ADDSIG(SIGWINCH, JobCondPassSig) 2243 ADDSIG(SIGCONT, JobContinueSig) 2244 #undef ADDSIG 2245 2246 begin = Targ_FindNode(".BEGIN", TARG_NOCREATE); 2247 2248 if (begin != NULL) { 2249 JobRun(begin); 2250 if (begin->made == ERROR) { 2251 PrintOnError(begin, "\n\nStop."); 2252 exit(1); 2253 } 2254 } 2255 postCommands = Targ_FindNode(".END", TARG_CREATE); 2256 } 2257 2258 static void JobSigReset(void) 2259 { 2260 #define DELSIG(s) \ 2261 if (sigismember(&caught_signals, s)) { \ 2262 (void)bmake_signal(s, SIG_DFL); \ 2263 } 2264 2265 DELSIG(SIGINT) 2266 DELSIG(SIGHUP) 2267 DELSIG(SIGQUIT) 2268 DELSIG(SIGTERM) 2269 DELSIG(SIGTSTP) 2270 DELSIG(SIGTTOU) 2271 DELSIG(SIGTTIN) 2272 DELSIG(SIGWINCH) 2273 DELSIG(SIGCONT) 2274 #undef DELSIG 2275 (void)bmake_signal(SIGCHLD, SIG_DFL); 2276 } 2277 2278 /*- 2279 *----------------------------------------------------------------------- 2280 * JobMatchShell -- 2281 * Find a shell in 'shells' given its name. 2282 * 2283 * Results: 2284 * A pointer to the Shell structure. 2285 * 2286 * Side Effects: 2287 * None. 2288 * 2289 *----------------------------------------------------------------------- 2290 */ 2291 static Shell * 2292 JobMatchShell(const char *name) 2293 { 2294 Shell *sh; 2295 2296 for (sh = shells; sh->name != NULL; sh++) { 2297 if (strcmp(name, sh->name) == 0) 2298 return (sh); 2299 } 2300 return NULL; 2301 } 2302 2303 /*- 2304 *----------------------------------------------------------------------- 2305 * Job_ParseShell -- 2306 * Parse a shell specification and set up commandShell, shellPath 2307 * and shellName appropriately. 2308 * 2309 * Input: 2310 * line The shell spec 2311 * 2312 * Results: 2313 * FAILURE if the specification was incorrect. 2314 * 2315 * Side Effects: 2316 * commandShell points to a Shell structure (either predefined or 2317 * created from the shell spec), shellPath is the full path of the 2318 * shell described by commandShell, while shellName is just the 2319 * final component of shellPath. 2320 * 2321 * Notes: 2322 * A shell specification consists of a .SHELL target, with dependency 2323 * operator, followed by a series of blank-separated words. Double 2324 * quotes can be used to use blanks in words. A backslash escapes 2325 * anything (most notably a double-quote and a space) and 2326 * provides the functionality it does in C. Each word consists of 2327 * keyword and value separated by an equal sign. There should be no 2328 * unnecessary spaces in the word. The keywords are as follows: 2329 * name Name of shell. 2330 * path Location of shell. 2331 * quiet Command to turn off echoing. 2332 * echo Command to turn echoing on 2333 * filter Result of turning off echoing that shouldn't be 2334 * printed. 2335 * echoFlag Flag to turn echoing on at the start 2336 * errFlag Flag to turn error checking on at the start 2337 * hasErrCtl True if shell has error checking control 2338 * newline String literal to represent a newline char 2339 * check Command to turn on error checking if hasErrCtl 2340 * is TRUE or template of command to echo a command 2341 * for which error checking is off if hasErrCtl is 2342 * FALSE. 2343 * ignore Command to turn off error checking if hasErrCtl 2344 * is TRUE or template of command to execute a 2345 * command so as to ignore any errors it returns if 2346 * hasErrCtl is FALSE. 2347 * 2348 *----------------------------------------------------------------------- 2349 */ 2350 ReturnStatus 2351 Job_ParseShell(char *line) 2352 { 2353 char **words; 2354 char **argv; 2355 int argc; 2356 char *path; 2357 Shell newShell; 2358 Boolean fullSpec = FALSE; 2359 Shell *sh; 2360 2361 while (isspace((unsigned char)*line)) { 2362 line++; 2363 } 2364 2365 if (shellArgv) 2366 free(UNCONST(shellArgv)); 2367 2368 memset(&newShell, 0, sizeof(newShell)); 2369 2370 /* 2371 * Parse the specification by keyword 2372 */ 2373 words = brk_string(line, &argc, TRUE, &path); 2374 if (words == NULL) { 2375 Error("Unterminated quoted string [%s]", line); 2376 return FAILURE; 2377 } 2378 shellArgv = path; 2379 2380 for (path = NULL, argv = words; argc != 0; argc--, argv++) { 2381 if (strncmp(*argv, "path=", 5) == 0) { 2382 path = &argv[0][5]; 2383 } else if (strncmp(*argv, "name=", 5) == 0) { 2384 newShell.name = &argv[0][5]; 2385 } else { 2386 if (strncmp(*argv, "quiet=", 6) == 0) { 2387 newShell.echoOff = &argv[0][6]; 2388 } else if (strncmp(*argv, "echo=", 5) == 0) { 2389 newShell.echoOn = &argv[0][5]; 2390 } else if (strncmp(*argv, "filter=", 7) == 0) { 2391 newShell.noPrint = &argv[0][7]; 2392 newShell.noPLen = strlen(newShell.noPrint); 2393 } else if (strncmp(*argv, "echoFlag=", 9) == 0) { 2394 newShell.echo = &argv[0][9]; 2395 } else if (strncmp(*argv, "errFlag=", 8) == 0) { 2396 newShell.exit = &argv[0][8]; 2397 } else if (strncmp(*argv, "hasErrCtl=", 10) == 0) { 2398 char c = argv[0][10]; 2399 newShell.hasErrCtl = !((c != 'Y') && (c != 'y') && 2400 (c != 'T') && (c != 't')); 2401 } else if (strncmp(*argv, "newline=", 8) == 0) { 2402 newShell.newline = &argv[0][8]; 2403 } else if (strncmp(*argv, "check=", 6) == 0) { 2404 newShell.errCheck = &argv[0][6]; 2405 } else if (strncmp(*argv, "ignore=", 7) == 0) { 2406 newShell.ignErr = &argv[0][7]; 2407 } else if (strncmp(*argv, "errout=", 7) == 0) { 2408 newShell.errOut = &argv[0][7]; 2409 } else if (strncmp(*argv, "comment=", 8) == 0) { 2410 newShell.commentChar = argv[0][8]; 2411 } else { 2412 Parse_Error(PARSE_FATAL, "Unknown keyword \"%s\"", 2413 *argv); 2414 free(words); 2415 return(FAILURE); 2416 } 2417 fullSpec = TRUE; 2418 } 2419 } 2420 2421 if (path == NULL) { 2422 /* 2423 * If no path was given, the user wants one of the pre-defined shells, 2424 * yes? So we find the one s/he wants with the help of JobMatchShell 2425 * and set things up the right way. shellPath will be set up by 2426 * Shell_Init. 2427 */ 2428 if (newShell.name == NULL) { 2429 Parse_Error(PARSE_FATAL, "Neither path nor name specified"); 2430 free(words); 2431 return(FAILURE); 2432 } else { 2433 if ((sh = JobMatchShell(newShell.name)) == NULL) { 2434 Parse_Error(PARSE_WARNING, "%s: No matching shell", 2435 newShell.name); 2436 free(words); 2437 return(FAILURE); 2438 } 2439 commandShell = sh; 2440 shellName = newShell.name; 2441 if (shellPath) { 2442 /* Shell_Init has already been called! Do it again. */ 2443 free(UNCONST(shellPath)); 2444 shellPath = NULL; 2445 Shell_Init(); 2446 } 2447 } 2448 } else { 2449 /* 2450 * The user provided a path. If s/he gave nothing else (fullSpec is 2451 * FALSE), try and find a matching shell in the ones we know of. 2452 * Else we just take the specification at its word and copy it 2453 * to a new location. In either case, we need to record the 2454 * path the user gave for the shell. 2455 */ 2456 shellPath = path; 2457 path = strrchr(path, '/'); 2458 if (path == NULL) { 2459 path = UNCONST(shellPath); 2460 } else { 2461 path += 1; 2462 } 2463 if (newShell.name != NULL) { 2464 shellName = newShell.name; 2465 } else { 2466 shellName = path; 2467 } 2468 if (!fullSpec) { 2469 if ((sh = JobMatchShell(shellName)) == NULL) { 2470 Parse_Error(PARSE_WARNING, "%s: No matching shell", 2471 shellName); 2472 free(words); 2473 return(FAILURE); 2474 } 2475 commandShell = sh; 2476 } else { 2477 commandShell = bmake_malloc(sizeof(Shell)); 2478 *commandShell = newShell; 2479 } 2480 } 2481 2482 if (commandShell->echoOn && commandShell->echoOff) { 2483 commandShell->hasEchoCtl = TRUE; 2484 } 2485 2486 if (!commandShell->hasErrCtl) { 2487 if (commandShell->errCheck == NULL) { 2488 commandShell->errCheck = ""; 2489 } 2490 if (commandShell->ignErr == NULL) { 2491 commandShell->ignErr = "%s\n"; 2492 } 2493 } 2494 2495 /* 2496 * Do not free up the words themselves, since they might be in use by the 2497 * shell specification. 2498 */ 2499 free(words); 2500 return SUCCESS; 2501 } 2502 2503 /*- 2504 *----------------------------------------------------------------------- 2505 * JobInterrupt -- 2506 * Handle the receipt of an interrupt. 2507 * 2508 * Input: 2509 * runINTERRUPT Non-zero if commands for the .INTERRUPT target 2510 * should be executed 2511 * signo signal received 2512 * 2513 * Results: 2514 * None 2515 * 2516 * Side Effects: 2517 * All children are killed. Another job will be started if the 2518 * .INTERRUPT target was given. 2519 *----------------------------------------------------------------------- 2520 */ 2521 static void 2522 JobInterrupt(int runINTERRUPT, int signo) 2523 { 2524 Job *job; /* job descriptor in that element */ 2525 GNode *interrupt; /* the node describing the .INTERRUPT target */ 2526 sigset_t mask; 2527 GNode *gn; 2528 2529 aborting = ABORT_INTERRUPT; 2530 2531 JobSigLock(&mask); 2532 2533 for (job = job_table; job < job_table_end; job++) { 2534 if (job->job_state != JOB_ST_RUNNING) 2535 continue; 2536 2537 gn = job->node; 2538 2539 if ((gn->type & (OP_JOIN|OP_PHONY)) == 0 && !Targ_Precious(gn)) { 2540 char *file = (gn->path == NULL ? gn->name : gn->path); 2541 if (!noExecute && eunlink(file) != -1) { 2542 Error("*** %s removed", file); 2543 } 2544 } 2545 if (job->pid) { 2546 if (DEBUG(JOB)) { 2547 (void)fprintf(debug_file, 2548 "JobInterrupt passing signal %d to child %d.\n", 2549 signo, job->pid); 2550 } 2551 KILLPG(job->pid, signo); 2552 } 2553 } 2554 2555 JobSigUnlock(&mask); 2556 2557 if (runINTERRUPT && !touchFlag) { 2558 interrupt = Targ_FindNode(".INTERRUPT", TARG_NOCREATE); 2559 if (interrupt != NULL) { 2560 ignoreErrors = FALSE; 2561 JobRun(interrupt); 2562 } 2563 } 2564 Trace_Log(MAKEINTR, 0); 2565 exit(signo); 2566 } 2567 2568 /* 2569 *----------------------------------------------------------------------- 2570 * Job_Finish -- 2571 * Do final processing such as the running of the commands 2572 * attached to the .END target. 2573 * 2574 * Results: 2575 * Number of errors reported. 2576 * 2577 * Side Effects: 2578 * None. 2579 *----------------------------------------------------------------------- 2580 */ 2581 int 2582 Job_Finish(void) 2583 { 2584 if (postCommands != NULL && 2585 (!Lst_IsEmpty(postCommands->commands) || 2586 !Lst_IsEmpty(postCommands->children))) { 2587 if (errors) { 2588 Error("Errors reported so .END ignored"); 2589 } else { 2590 JobRun(postCommands); 2591 } 2592 } 2593 return(errors); 2594 } 2595 2596 /*- 2597 *----------------------------------------------------------------------- 2598 * Job_End -- 2599 * Cleanup any memory used by the jobs module 2600 * 2601 * Results: 2602 * None. 2603 * 2604 * Side Effects: 2605 * Memory is freed 2606 *----------------------------------------------------------------------- 2607 */ 2608 void 2609 Job_End(void) 2610 { 2611 #ifdef CLEANUP 2612 if (shellArgv) 2613 free(shellArgv); 2614 #endif 2615 } 2616 2617 /*- 2618 *----------------------------------------------------------------------- 2619 * Job_Wait -- 2620 * Waits for all running jobs to finish and returns. Sets 'aborting' 2621 * to ABORT_WAIT to prevent other jobs from starting. 2622 * 2623 * Results: 2624 * None. 2625 * 2626 * Side Effects: 2627 * Currently running jobs finish. 2628 * 2629 *----------------------------------------------------------------------- 2630 */ 2631 void 2632 Job_Wait(void) 2633 { 2634 aborting = ABORT_WAIT; 2635 while (jobTokensRunning != 0) { 2636 Job_CatchOutput(); 2637 } 2638 aborting = 0; 2639 } 2640 2641 /*- 2642 *----------------------------------------------------------------------- 2643 * Job_AbortAll -- 2644 * Abort all currently running jobs without handling output or anything. 2645 * This function is to be called only in the event of a major 2646 * error. Most definitely NOT to be called from JobInterrupt. 2647 * 2648 * Results: 2649 * None 2650 * 2651 * Side Effects: 2652 * All children are killed, not just the firstborn 2653 *----------------------------------------------------------------------- 2654 */ 2655 void 2656 Job_AbortAll(void) 2657 { 2658 Job *job; /* the job descriptor in that element */ 2659 int foo; 2660 2661 aborting = ABORT_ERROR; 2662 2663 if (jobTokensRunning) { 2664 for (job = job_table; job < job_table_end; job++) { 2665 if (job->job_state != JOB_ST_RUNNING) 2666 continue; 2667 /* 2668 * kill the child process with increasingly drastic signals to make 2669 * darn sure it's dead. 2670 */ 2671 KILLPG(job->pid, SIGINT); 2672 KILLPG(job->pid, SIGKILL); 2673 } 2674 } 2675 2676 /* 2677 * Catch as many children as want to report in at first, then give up 2678 */ 2679 while (waitpid((pid_t) -1, &foo, WNOHANG) > 0) 2680 continue; 2681 } 2682 2683 2684 /*- 2685 *----------------------------------------------------------------------- 2686 * JobRestartJobs -- 2687 * Tries to restart stopped jobs if there are slots available. 2688 * Called in process context in response to a SIGCONT. 2689 * 2690 * Results: 2691 * None. 2692 * 2693 * Side Effects: 2694 * Resumes jobs. 2695 * 2696 *----------------------------------------------------------------------- 2697 */ 2698 static void 2699 JobRestartJobs(void) 2700 { 2701 Job *job; 2702 2703 for (job = job_table; job < job_table_end; job++) { 2704 if (job->job_state == JOB_ST_RUNNING && 2705 (make_suspended || job->job_suspended)) { 2706 if (DEBUG(JOB)) { 2707 (void)fprintf(debug_file, "Restarting stopped job pid %d.\n", 2708 job->pid); 2709 } 2710 if (job->job_suspended) { 2711 (void)printf("*** [%s] Continued\n", job->node->name); 2712 (void)fflush(stdout); 2713 } 2714 job->job_suspended = 0; 2715 if (KILLPG(job->pid, SIGCONT) != 0 && DEBUG(JOB)) { 2716 fprintf(debug_file, "Failed to send SIGCONT to %d\n", job->pid); 2717 } 2718 } 2719 if (job->job_state == JOB_ST_FINISHED) 2720 /* Job exit deferred after calling waitpid() in a signal handler */ 2721 JobFinish(job, job->exit_status); 2722 } 2723 make_suspended = 0; 2724 } 2725 2726 static void 2727 watchfd(Job *job) 2728 { 2729 if (job->inPollfd != NULL) 2730 Punt("Watching watched job"); 2731 2732 fds[nfds].fd = job->inPipe; 2733 fds[nfds].events = POLLIN; 2734 jobfds[nfds] = job; 2735 job->inPollfd = &fds[nfds]; 2736 nfds++; 2737 } 2738 2739 static void 2740 clearfd(Job *job) 2741 { 2742 int i; 2743 if (job->inPollfd == NULL) 2744 Punt("Unwatching unwatched job"); 2745 i = job->inPollfd - fds; 2746 nfds--; 2747 /* 2748 * Move last job in table into hole made by dead job. 2749 */ 2750 if (nfds != i) { 2751 fds[i] = fds[nfds]; 2752 jobfds[i] = jobfds[nfds]; 2753 jobfds[i]->inPollfd = &fds[i]; 2754 } 2755 job->inPollfd = NULL; 2756 } 2757 2758 static int 2759 readyfd(Job *job) 2760 { 2761 if (job->inPollfd == NULL) 2762 Punt("Polling unwatched job"); 2763 return (job->inPollfd->revents & POLLIN) != 0; 2764 } 2765 2766 /*- 2767 *----------------------------------------------------------------------- 2768 * JobTokenAdd -- 2769 * Put a token into the job pipe so that some make process can start 2770 * another job. 2771 * 2772 * Side Effects: 2773 * Allows more build jobs to be spawned somewhere. 2774 * 2775 *----------------------------------------------------------------------- 2776 */ 2777 2778 static void 2779 JobTokenAdd(void) 2780 { 2781 char tok = JOB_TOKENS[aborting], tok1; 2782 2783 /* If we are depositing an error token flush everything else */ 2784 while (tok != '+' && read(tokenWaitJob.inPipe, &tok1, 1) == 1) 2785 continue; 2786 2787 if (DEBUG(JOB)) 2788 fprintf(debug_file, "(%d) aborting %d, deposit token %c\n", 2789 getpid(), aborting, JOB_TOKENS[aborting]); 2790 write(tokenWaitJob.outPipe, &tok, 1); 2791 } 2792 2793 /*- 2794 *----------------------------------------------------------------------- 2795 * Job_ServerStartTokenAdd -- 2796 * Prep the job token pipe in the root make process. 2797 * 2798 *----------------------------------------------------------------------- 2799 */ 2800 2801 void 2802 Job_ServerStart(int max_tokens, int jp_0, int jp_1) 2803 { 2804 int i; 2805 char jobarg[64]; 2806 2807 if (jp_0 >= 0 && jp_1 >= 0) { 2808 /* Pipe passed in from parent */ 2809 tokenWaitJob.inPipe = jp_0; 2810 tokenWaitJob.outPipe = jp_1; 2811 return; 2812 } 2813 2814 JobCreatePipe(&tokenWaitJob, 15); 2815 2816 snprintf(jobarg, sizeof(jobarg), "%d,%d", 2817 tokenWaitJob.inPipe, tokenWaitJob.outPipe); 2818 2819 Var_Append(MAKEFLAGS, "-J", VAR_GLOBAL); 2820 Var_Append(MAKEFLAGS, jobarg, VAR_GLOBAL); 2821 2822 /* 2823 * Preload the job pipe with one token per job, save the one 2824 * "extra" token for the primary job. 2825 * 2826 * XXX should clip maxJobs against PIPE_BUF -- if max_tokens is 2827 * larger than the write buffer size of the pipe, we will 2828 * deadlock here. 2829 */ 2830 for (i = 1; i < max_tokens; i++) 2831 JobTokenAdd(); 2832 } 2833 2834 /*- 2835 *----------------------------------------------------------------------- 2836 * Job_TokenReturn -- 2837 * Return a withdrawn token to the pool. 2838 * 2839 *----------------------------------------------------------------------- 2840 */ 2841 2842 void 2843 Job_TokenReturn(void) 2844 { 2845 jobTokensRunning--; 2846 if (jobTokensRunning < 0) 2847 Punt("token botch"); 2848 if (jobTokensRunning || JOB_TOKENS[aborting] != '+') 2849 JobTokenAdd(); 2850 } 2851 2852 /*- 2853 *----------------------------------------------------------------------- 2854 * Job_TokenWithdraw -- 2855 * Attempt to withdraw a token from the pool. 2856 * 2857 * Results: 2858 * Returns TRUE if a token was withdrawn, and FALSE if the pool 2859 * is currently empty. 2860 * 2861 * Side Effects: 2862 * If pool is empty, set wantToken so that we wake up 2863 * when a token is released. 2864 * 2865 *----------------------------------------------------------------------- 2866 */ 2867 2868 2869 Boolean 2870 Job_TokenWithdraw(void) 2871 { 2872 char tok, tok1; 2873 int count; 2874 2875 wantToken = 0; 2876 if (DEBUG(JOB)) 2877 fprintf(debug_file, "Job_TokenWithdraw(%d): aborting %d, running %d\n", 2878 getpid(), aborting, jobTokensRunning); 2879 2880 if (aborting || (jobTokensRunning >= maxJobs)) 2881 return FALSE; 2882 2883 count = read(tokenWaitJob.inPipe, &tok, 1); 2884 if (count == 0) 2885 Fatal("eof on job pipe!"); 2886 if (count < 0 && jobTokensRunning != 0) { 2887 if (errno != EAGAIN) { 2888 Fatal("job pipe read: %s", strerror(errno)); 2889 } 2890 if (DEBUG(JOB)) 2891 fprintf(debug_file, "(%d) blocked for token\n", getpid()); 2892 wantToken = 1; 2893 return FALSE; 2894 } 2895 2896 if (count == 1 && tok != '+') { 2897 /* make being abvorted - remove any other job tokens */ 2898 if (DEBUG(JOB)) 2899 fprintf(debug_file, "(%d) aborted by token %c\n", getpid(), tok); 2900 while (read(tokenWaitJob.inPipe, &tok1, 1) == 1) 2901 continue; 2902 /* And put the stopper back */ 2903 write(tokenWaitJob.outPipe, &tok, 1); 2904 Fatal("A failure has been detected in another branch of the parallel make"); 2905 } 2906 2907 if (count == 1 && jobTokensRunning == 0) 2908 /* We didn't want the token really */ 2909 write(tokenWaitJob.outPipe, &tok, 1); 2910 2911 jobTokensRunning++; 2912 if (DEBUG(JOB)) 2913 fprintf(debug_file, "(%d) withdrew token\n", getpid()); 2914 return TRUE; 2915 } 2916 2917 #ifdef USE_SELECT 2918 int 2919 emul_poll(struct pollfd *fd, int nfd, int timeout) 2920 { 2921 fd_set rfds, wfds; 2922 int i, maxfd, nselect, npoll; 2923 struct timeval tv, *tvp; 2924 long usecs; 2925 2926 FD_ZERO(&rfds); 2927 FD_ZERO(&wfds); 2928 2929 maxfd = -1; 2930 for (i = 0; i < nfd; i++) { 2931 fd[i].revents = 0; 2932 2933 if (fd[i].events & POLLIN) 2934 FD_SET(fd[i].fd, &rfds); 2935 2936 if (fd[i].events & POLLOUT) 2937 FD_SET(fd[i].fd, &wfds); 2938 2939 if (fd[i].fd > maxfd) 2940 maxfd = fd[i].fd; 2941 } 2942 2943 if (maxfd >= FD_SETSIZE) { 2944 Punt("Ran out of fd_set slots; " 2945 "recompile with a larger FD_SETSIZE."); 2946 } 2947 2948 if (timeout < 0) { 2949 tvp = NULL; 2950 } else { 2951 usecs = timeout * 1000; 2952 tv.tv_sec = usecs / 1000000; 2953 tv.tv_usec = usecs % 1000000; 2954 tvp = &tv; 2955 } 2956 2957 nselect = select(maxfd + 1, &rfds, &wfds, 0, tvp); 2958 2959 if (nselect <= 0) 2960 return nselect; 2961 2962 npoll = 0; 2963 for (i = 0; i < nfd; i++) { 2964 if (FD_ISSET(fd[i].fd, &rfds)) 2965 fd[i].revents |= POLLIN; 2966 2967 if (FD_ISSET(fd[i].fd, &wfds)) 2968 fd[i].revents |= POLLOUT; 2969 2970 if (fd[i].revents) 2971 npoll++; 2972 } 2973 2974 return npoll; 2975 } 2976 #endif /* USE_SELECT */ 2977