1 /* $NetBSD: job.c,v 1.188 2016/08/26 23:28:39 dholland 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 1.188 2016/08/26 23:28:39 dholland 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 1.188 2016/08/26 23:28:39 dholland 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 #ifdef HAVE_CONFIG_H 137 # include "config.h" 138 #endif 139 #include <sys/types.h> 140 #include <sys/stat.h> 141 #include <sys/file.h> 142 #include <sys/time.h> 143 #include "wait.h" 144 145 #include <assert.h> 146 #include <errno.h> 147 #if !defined(USE_SELECT) && defined(HAVE_POLL_H) 148 #include <poll.h> 149 #else 150 #ifndef USE_SELECT /* no poll.h */ 151 # define USE_SELECT 152 #endif 153 #if defined(HAVE_SYS_SELECT_H) 154 # include <sys/select.h> 155 #endif 156 #endif 157 #include <signal.h> 158 #include <stdio.h> 159 #include <string.h> 160 #include <utime.h> 161 #if defined(HAVE_SYS_SOCKET_H) 162 # include <sys/socket.h> 163 #endif 164 165 #include "make.h" 166 #include "hash.h" 167 #include "dir.h" 168 #include "job.h" 169 #include "pathnames.h" 170 #include "trace.h" 171 # define STATIC static 172 173 /* 174 * FreeBSD: traditionally .MAKE is not required to 175 * pass jobs queue to sub-makes. 176 * Use .MAKE.ALWAYS_PASS_JOB_QUEUE=no to disable. 177 */ 178 #define MAKE_ALWAYS_PASS_JOB_QUEUE ".MAKE.ALWAYS_PASS_JOB_QUEUE" 179 static int Always_pass_job_queue = TRUE; 180 /* 181 * FreeBSD: aborting entire parallel make isn't always 182 * desired. When doing tinderbox for example, failure of 183 * one architecture should not stop all. 184 * We still want to bail on interrupt though. 185 */ 186 #define MAKE_JOB_ERROR_TOKEN "MAKE_JOB_ERROR_TOKEN" 187 static int Job_error_token = TRUE; 188 189 /* 190 * error handling variables 191 */ 192 static int errors = 0; /* number of errors reported */ 193 static int aborting = 0; /* why is the make aborting? */ 194 #define ABORT_ERROR 1 /* Because of an error */ 195 #define ABORT_INTERRUPT 2 /* Because it was interrupted */ 196 #define ABORT_WAIT 3 /* Waiting for jobs to finish */ 197 #define JOB_TOKENS "+EI+" /* Token to requeue for each abort state */ 198 199 /* 200 * this tracks the number of tokens currently "out" to build jobs. 201 */ 202 int jobTokensRunning = 0; 203 int not_parallel = 0; /* set if .NOT_PARALLEL */ 204 205 /* 206 * XXX: Avoid SunOS bug... FILENO() is fp->_file, and file 207 * is a char! So when we go above 127 we turn negative! 208 */ 209 #define FILENO(a) ((unsigned) fileno(a)) 210 211 /* 212 * post-make command processing. The node postCommands is really just the 213 * .END target but we keep it around to avoid having to search for it 214 * all the time. 215 */ 216 static GNode *postCommands = NULL; 217 /* node containing commands to execute when 218 * everything else is done */ 219 static int numCommands; /* The number of commands actually printed 220 * for a target. Should this number be 221 * 0, no shell will be executed. */ 222 223 /* 224 * Return values from JobStart. 225 */ 226 #define JOB_RUNNING 0 /* Job is running */ 227 #define JOB_ERROR 1 /* Error in starting the job */ 228 #define JOB_FINISHED 2 /* The job is already finished */ 229 230 /* 231 * Descriptions for various shells. 232 * 233 * The build environment may set DEFSHELL_INDEX to one of 234 * DEFSHELL_INDEX_SH, DEFSHELL_INDEX_KSH, or DEFSHELL_INDEX_CSH, to 235 * select one of the prefedined shells as the default shell. 236 * 237 * Alternatively, the build environment may set DEFSHELL_CUSTOM to the 238 * name or the full path of a sh-compatible shell, which will be used as 239 * the default shell. 240 * 241 * ".SHELL" lines in Makefiles can choose the default shell from the 242 # set defined here, or add additional shells. 243 */ 244 245 #ifdef DEFSHELL_CUSTOM 246 #define DEFSHELL_INDEX_CUSTOM 0 247 #define DEFSHELL_INDEX_SH 1 248 #define DEFSHELL_INDEX_KSH 2 249 #define DEFSHELL_INDEX_CSH 3 250 #else /* !DEFSHELL_CUSTOM */ 251 #define DEFSHELL_INDEX_SH 0 252 #define DEFSHELL_INDEX_KSH 1 253 #define DEFSHELL_INDEX_CSH 2 254 #endif /* !DEFSHELL_CUSTOM */ 255 256 #ifndef DEFSHELL_INDEX 257 #define DEFSHELL_INDEX 0 /* DEFSHELL_INDEX_CUSTOM or DEFSHELL_INDEX_SH */ 258 #endif /* !DEFSHELL_INDEX */ 259 260 static Shell shells[] = { 261 #ifdef DEFSHELL_CUSTOM 262 /* 263 * An sh-compatible shell with a non-standard name. 264 * 265 * Keep this in sync with the "sh" description below, but avoid 266 * non-portable features that might not be supplied by all 267 * sh-compatible shells. 268 */ 269 { 270 DEFSHELL_CUSTOM, 271 FALSE, "", "", "", 0, 272 FALSE, "echo \"%s\"\n", "%s\n", "{ %s \n} || exit $?\n", "'\n'", '#', 273 "", 274 "", 275 }, 276 #endif /* DEFSHELL_CUSTOM */ 277 /* 278 * SH description. Echo control is also possible and, under 279 * sun UNIX anyway, one can even control error checking. 280 */ 281 { 282 "sh", 283 FALSE, "", "", "", 0, 284 FALSE, "echo \"%s\"\n", "%s\n", "{ %s \n} || exit $?\n", "'\n'", '#', 285 #if defined(MAKE_NATIVE) && defined(__NetBSD__) 286 "q", 287 #else 288 "", 289 #endif 290 "", 291 }, 292 /* 293 * KSH description. 294 */ 295 { 296 "ksh", 297 TRUE, "set +v", "set -v", "set +v", 6, 298 FALSE, "echo \"%s\"\n", "%s\n", "{ %s \n} || exit $?\n", "'\n'", '#', 299 "v", 300 "", 301 }, 302 /* 303 * CSH description. The csh can do echo control by playing 304 * with the setting of the 'echo' shell variable. Sadly, 305 * however, it is unable to do error control nicely. 306 */ 307 { 308 "csh", 309 TRUE, "unset verbose", "set verbose", "unset verbose", 10, 310 FALSE, "echo \"%s\"\n", "csh -c \"%s || exit 0\"\n", "", "'\\\n'", '#', 311 "v", "e", 312 }, 313 /* 314 * UNKNOWN. 315 */ 316 { 317 NULL, 318 FALSE, NULL, NULL, NULL, 0, 319 FALSE, NULL, NULL, NULL, NULL, 0, 320 NULL, NULL, 321 } 322 }; 323 static Shell *commandShell = &shells[DEFSHELL_INDEX]; /* this is the shell to 324 * which we pass all 325 * commands in the Makefile. 326 * It is set by the 327 * Job_ParseShell function */ 328 const char *shellPath = NULL, /* full pathname of 329 * executable image */ 330 *shellName = NULL; /* last component of shell */ 331 char *shellErrFlag = NULL; 332 static const char *shellArgv = NULL; /* Custom shell args */ 333 334 335 STATIC Job *job_table; /* The structures that describe them */ 336 STATIC Job *job_table_end; /* job_table + maxJobs */ 337 static int wantToken; /* we want a token */ 338 static int lurking_children = 0; 339 static int make_suspended = 0; /* non-zero if we've seen a SIGTSTP (etc) */ 340 341 /* 342 * Set of descriptors of pipes connected to 343 * the output channels of children 344 */ 345 static struct pollfd *fds = NULL; 346 static Job **jobfds = NULL; 347 static int nfds = 0; 348 static void watchfd(Job *); 349 static void clearfd(Job *); 350 static int readyfd(Job *); 351 352 STATIC GNode *lastNode; /* The node for which output was most recently 353 * produced. */ 354 static char *targPrefix = NULL; /* What we print at the start of TARG_FMT */ 355 static Job tokenWaitJob; /* token wait pseudo-job */ 356 357 static Job childExitJob; /* child exit pseudo-job */ 358 #define CHILD_EXIT "." 359 #define DO_JOB_RESUME "R" 360 361 #define TARG_FMT "%s %s ---\n" /* Default format */ 362 #define MESSAGE(fp, gn) \ 363 if (maxJobs != 1 && targPrefix && *targPrefix) \ 364 (void)fprintf(fp, TARG_FMT, targPrefix, gn->name) 365 366 static sigset_t caught_signals; /* Set of signals we handle */ 367 #if defined(SYSV) 368 #define KILLPG(pid, sig) kill(-(pid), (sig)) 369 #else 370 #define KILLPG(pid, sig) killpg((pid), (sig)) 371 #endif 372 373 static void JobChildSig(int); 374 static void JobContinueSig(int); 375 static Job *JobFindPid(int, int, Boolean); 376 static int JobPrintCommand(void *, void *); 377 static int JobSaveCommand(void *, void *); 378 static void JobClose(Job *); 379 static void JobExec(Job *, char **); 380 static void JobMakeArgv(Job *, char **); 381 static int JobStart(GNode *, int); 382 static char *JobOutput(Job *, char *, char *, int); 383 static void JobDoOutput(Job *, Boolean); 384 static Shell *JobMatchShell(const char *); 385 static void JobInterrupt(int, int) MAKE_ATTR_DEAD; 386 static void JobRestartJobs(void); 387 static void JobTokenAdd(void); 388 static void JobSigLock(sigset_t *); 389 static void JobSigUnlock(sigset_t *); 390 static void JobSigReset(void); 391 392 const char *malloc_options="A"; 393 394 static void 395 job_table_dump(const char *where) 396 { 397 Job *job; 398 399 fprintf(debug_file, "job table @ %s\n", where); 400 for (job = job_table; job < job_table_end; job++) { 401 fprintf(debug_file, "job %d, status %d, flags %d, pid %d\n", 402 (int)(job - job_table), job->job_state, job->flags, job->pid); 403 } 404 } 405 406 /* 407 * Delete the target of a failed, interrupted, or otherwise 408 * unsuccessful job unless inhibited by .PRECIOUS. 409 */ 410 static void 411 JobDeleteTarget(GNode *gn) 412 { 413 if ((gn->type & (OP_JOIN|OP_PHONY)) == 0 && !Targ_Precious(gn)) { 414 char *file = (gn->path == NULL ? gn->name : gn->path); 415 if (!noExecute && eunlink(file) != -1) { 416 Error("*** %s removed", file); 417 } 418 } 419 } 420 421 /* 422 * JobSigLock/JobSigUnlock 423 * 424 * Signal lock routines to get exclusive access. Currently used to 425 * protect `jobs' and `stoppedJobs' list manipulations. 426 */ 427 static void JobSigLock(sigset_t *omaskp) 428 { 429 if (sigprocmask(SIG_BLOCK, &caught_signals, omaskp) != 0) { 430 Punt("JobSigLock: sigprocmask: %s", strerror(errno)); 431 sigemptyset(omaskp); 432 } 433 } 434 435 static void JobSigUnlock(sigset_t *omaskp) 436 { 437 (void)sigprocmask(SIG_SETMASK, omaskp, NULL); 438 } 439 440 static void 441 JobCreatePipe(Job *job, int minfd) 442 { 443 int i, fd; 444 445 if (pipe(job->jobPipe) == -1) 446 Punt("Cannot create pipe: %s", strerror(errno)); 447 448 for (i = 0; i < 2; i++) { 449 /* Avoid using low numbered fds */ 450 fd = fcntl(job->jobPipe[i], F_DUPFD, minfd); 451 if (fd != -1) { 452 close(job->jobPipe[i]); 453 job->jobPipe[i] = fd; 454 } 455 } 456 457 /* Set close-on-exec flag for both */ 458 (void)fcntl(job->jobPipe[0], F_SETFD, FD_CLOEXEC); 459 (void)fcntl(job->jobPipe[1], F_SETFD, FD_CLOEXEC); 460 461 /* 462 * We mark the input side of the pipe non-blocking; we poll(2) the 463 * pipe when we're waiting for a job token, but we might lose the 464 * race for the token when a new one becomes available, so the read 465 * from the pipe should not block. 466 */ 467 fcntl(job->jobPipe[0], F_SETFL, 468 fcntl(job->jobPipe[0], F_GETFL, 0) | O_NONBLOCK); 469 } 470 471 /*- 472 *----------------------------------------------------------------------- 473 * JobCondPassSig -- 474 * Pass a signal to a job 475 * 476 * Input: 477 * signop Signal to send it 478 * 479 * Side Effects: 480 * None, except the job may bite it. 481 * 482 *----------------------------------------------------------------------- 483 */ 484 static void 485 JobCondPassSig(int signo) 486 { 487 Job *job; 488 489 if (DEBUG(JOB)) { 490 (void)fprintf(debug_file, "JobCondPassSig(%d) called.\n", signo); 491 } 492 493 for (job = job_table; job < job_table_end; job++) { 494 if (job->job_state != JOB_ST_RUNNING) 495 continue; 496 if (DEBUG(JOB)) { 497 (void)fprintf(debug_file, 498 "JobCondPassSig passing signal %d to child %d.\n", 499 signo, job->pid); 500 } 501 KILLPG(job->pid, signo); 502 } 503 } 504 505 /*- 506 *----------------------------------------------------------------------- 507 * JobChldSig -- 508 * SIGCHLD handler. 509 * 510 * Input: 511 * signo The signal number we've received 512 * 513 * Results: 514 * None. 515 * 516 * Side Effects: 517 * Sends a token on the child exit pipe to wake us up from 518 * select()/poll(). 519 * 520 *----------------------------------------------------------------------- 521 */ 522 static void 523 JobChildSig(int signo MAKE_ATTR_UNUSED) 524 { 525 while (write(childExitJob.outPipe, CHILD_EXIT, 1) == -1 && errno == EAGAIN) 526 continue; 527 } 528 529 530 /*- 531 *----------------------------------------------------------------------- 532 * JobContinueSig -- 533 * Resume all stopped jobs. 534 * 535 * Input: 536 * signo The signal number we've received 537 * 538 * Results: 539 * None. 540 * 541 * Side Effects: 542 * Jobs start running again. 543 * 544 *----------------------------------------------------------------------- 545 */ 546 static void 547 JobContinueSig(int signo MAKE_ATTR_UNUSED) 548 { 549 /* 550 * Defer sending to SIGCONT to our stopped children until we return 551 * from the signal handler. 552 */ 553 while (write(childExitJob.outPipe, DO_JOB_RESUME, 1) == -1 && 554 errno == EAGAIN) 555 continue; 556 } 557 558 /*- 559 *----------------------------------------------------------------------- 560 * JobPassSig -- 561 * Pass a signal on to all jobs, then resend to ourselves. 562 * 563 * Input: 564 * signo The signal number we've received 565 * 566 * Results: 567 * None. 568 * 569 * Side Effects: 570 * We die by the same signal. 571 * 572 *----------------------------------------------------------------------- 573 */ 574 MAKE_ATTR_DEAD static void 575 JobPassSig_int(int signo) 576 { 577 /* Run .INTERRUPT target then exit */ 578 JobInterrupt(TRUE, signo); 579 } 580 581 MAKE_ATTR_DEAD static void 582 JobPassSig_term(int signo) 583 { 584 /* Dont run .INTERRUPT target then exit */ 585 JobInterrupt(FALSE, signo); 586 } 587 588 static void 589 JobPassSig_suspend(int signo) 590 { 591 sigset_t nmask, omask; 592 struct sigaction act; 593 594 /* Suppress job started/continued messages */ 595 make_suspended = 1; 596 597 /* Pass the signal onto every job */ 598 JobCondPassSig(signo); 599 600 /* 601 * Send ourselves the signal now we've given the message to everyone else. 602 * Note we block everything else possible while we're getting the signal. 603 * This ensures that all our jobs get continued when we wake up before 604 * we take any other signal. 605 */ 606 sigfillset(&nmask); 607 sigdelset(&nmask, signo); 608 (void)sigprocmask(SIG_SETMASK, &nmask, &omask); 609 610 act.sa_handler = SIG_DFL; 611 sigemptyset(&act.sa_mask); 612 act.sa_flags = 0; 613 (void)sigaction(signo, &act, NULL); 614 615 if (DEBUG(JOB)) { 616 (void)fprintf(debug_file, 617 "JobPassSig passing signal %d to self.\n", signo); 618 } 619 620 (void)kill(getpid(), signo); 621 622 /* 623 * We've been continued. 624 * 625 * A whole host of signals continue to happen! 626 * SIGCHLD for any processes that actually suspended themselves. 627 * SIGCHLD for any processes that exited while we were alseep. 628 * The SIGCONT that actually caused us to wakeup. 629 * 630 * Since we defer passing the SIGCONT on to our children until 631 * the main processing loop, we can be sure that all the SIGCHLD 632 * events will have happened by then - and that the waitpid() will 633 * collect the child 'suspended' events. 634 * For correct sequencing we just need to ensure we process the 635 * waitpid() before passign on the SIGCONT. 636 * 637 * In any case nothing else is needed here. 638 */ 639 640 /* Restore handler and signal mask */ 641 act.sa_handler = JobPassSig_suspend; 642 (void)sigaction(signo, &act, NULL); 643 (void)sigprocmask(SIG_SETMASK, &omask, NULL); 644 } 645 646 /*- 647 *----------------------------------------------------------------------- 648 * JobFindPid -- 649 * Compare the pid of the job with the given pid and return 0 if they 650 * are equal. This function is called from Job_CatchChildren 651 * to find the job descriptor of the finished job. 652 * 653 * Input: 654 * job job to examine 655 * pid process id desired 656 * 657 * Results: 658 * Job with matching pid 659 * 660 * Side Effects: 661 * None 662 *----------------------------------------------------------------------- 663 */ 664 static Job * 665 JobFindPid(int pid, int status, Boolean isJobs) 666 { 667 Job *job; 668 669 for (job = job_table; job < job_table_end; job++) { 670 if ((job->job_state == status) && job->pid == pid) 671 return job; 672 } 673 if (DEBUG(JOB) && isJobs) 674 job_table_dump("no pid"); 675 return NULL; 676 } 677 678 /*- 679 *----------------------------------------------------------------------- 680 * JobPrintCommand -- 681 * Put out another command for the given job. If the command starts 682 * with an @ or a - we process it specially. In the former case, 683 * so long as the -s and -n flags weren't given to make, we stick 684 * a shell-specific echoOff command in the script. In the latter, 685 * we ignore errors for the entire job, unless the shell has error 686 * control. 687 * If the command is just "..." we take all future commands for this 688 * job to be commands to be executed once the entire graph has been 689 * made and return non-zero to signal that the end of the commands 690 * was reached. These commands are later attached to the postCommands 691 * node and executed by Job_End when all things are done. 692 * This function is called from JobStart via Lst_ForEach. 693 * 694 * Input: 695 * cmdp command string to print 696 * jobp job for which to print it 697 * 698 * Results: 699 * Always 0, unless the command was "..." 700 * 701 * Side Effects: 702 * If the command begins with a '-' and the shell has no error control, 703 * the JOB_IGNERR flag is set in the job descriptor. 704 * If the command is "..." and we're not ignoring such things, 705 * tailCmds is set to the successor node of the cmd. 706 * numCommands is incremented if the command is actually printed. 707 *----------------------------------------------------------------------- 708 */ 709 static int 710 JobPrintCommand(void *cmdp, void *jobp) 711 { 712 Boolean noSpecials; /* true if we shouldn't worry about 713 * inserting special commands into 714 * the input stream. */ 715 Boolean shutUp = FALSE; /* true if we put a no echo command 716 * into the command file */ 717 Boolean errOff = FALSE; /* true if we turned error checking 718 * off before printing the command 719 * and need to turn it back on */ 720 const char *cmdTemplate; /* Template to use when printing the 721 * command */ 722 char *cmdStart; /* Start of expanded command */ 723 char *escCmd = NULL; /* Command with quotes/backticks escaped */ 724 char *cmd = (char *)cmdp; 725 Job *job = (Job *)jobp; 726 int i, j; 727 728 noSpecials = NoExecute(job->node); 729 730 if (strcmp(cmd, "...") == 0) { 731 job->node->type |= OP_SAVE_CMDS; 732 if ((job->flags & JOB_IGNDOTS) == 0) { 733 job->tailCmds = Lst_Succ(Lst_Member(job->node->commands, 734 cmd)); 735 return 1; 736 } 737 return 0; 738 } 739 740 #define DBPRINTF(fmt, arg) if (DEBUG(JOB)) { \ 741 (void)fprintf(debug_file, fmt, arg); \ 742 } \ 743 (void)fprintf(job->cmdFILE, fmt, arg); \ 744 (void)fflush(job->cmdFILE); 745 746 numCommands += 1; 747 748 cmdStart = cmd = Var_Subst(NULL, cmd, job->node, VARF_WANTRES); 749 750 cmdTemplate = "%s\n"; 751 752 /* 753 * Check for leading @' and -'s to control echoing and error checking. 754 */ 755 while (*cmd == '@' || *cmd == '-' || (*cmd == '+')) { 756 switch (*cmd) { 757 case '@': 758 shutUp = DEBUG(LOUD) ? FALSE : TRUE; 759 break; 760 case '-': 761 errOff = TRUE; 762 break; 763 case '+': 764 if (noSpecials) { 765 /* 766 * We're not actually executing anything... 767 * but this one needs to be - use compat mode just for it. 768 */ 769 CompatRunCommand(cmdp, job->node); 770 return 0; 771 } 772 break; 773 } 774 cmd++; 775 } 776 777 while (isspace((unsigned char) *cmd)) 778 cmd++; 779 780 /* 781 * If the shell doesn't have error control the alternate echo'ing will 782 * be done (to avoid showing additional error checking code) 783 * and this will need the characters '$ ` \ "' escaped 784 */ 785 786 if (!commandShell->hasErrCtl) { 787 /* Worst that could happen is every char needs escaping. */ 788 escCmd = bmake_malloc((strlen(cmd) * 2) + 1); 789 for (i = 0, j= 0; cmd[i] != '\0'; i++, j++) { 790 if (cmd[i] == '$' || cmd[i] == '`' || cmd[i] == '\\' || 791 cmd[i] == '"') 792 escCmd[j++] = '\\'; 793 escCmd[j] = cmd[i]; 794 } 795 escCmd[j] = 0; 796 } 797 798 if (shutUp) { 799 if (!(job->flags & JOB_SILENT) && !noSpecials && 800 commandShell->hasEchoCtl) { 801 DBPRINTF("%s\n", commandShell->echoOff); 802 } else { 803 if (commandShell->hasErrCtl) 804 shutUp = FALSE; 805 } 806 } 807 808 if (errOff) { 809 if (!noSpecials) { 810 if (commandShell->hasErrCtl) { 811 /* 812 * we don't want the error-control commands showing 813 * up either, so we turn off echoing while executing 814 * them. We could put another field in the shell 815 * structure to tell JobDoOutput to look for this 816 * string too, but why make it any more complex than 817 * it already is? 818 */ 819 if (!(job->flags & JOB_SILENT) && !shutUp && 820 commandShell->hasEchoCtl) { 821 DBPRINTF("%s\n", commandShell->echoOff); 822 DBPRINTF("%s\n", commandShell->ignErr); 823 DBPRINTF("%s\n", commandShell->echoOn); 824 } else { 825 DBPRINTF("%s\n", commandShell->ignErr); 826 } 827 } else if (commandShell->ignErr && 828 (*commandShell->ignErr != '\0')) 829 { 830 /* 831 * The shell has no error control, so we need to be 832 * weird to get it to ignore any errors from the command. 833 * If echoing is turned on, we turn it off and use the 834 * errCheck template to echo the command. Leave echoing 835 * off so the user doesn't see the weirdness we go through 836 * to ignore errors. Set cmdTemplate to use the weirdness 837 * instead of the simple "%s\n" template. 838 */ 839 job->flags |= JOB_IGNERR; 840 if (!(job->flags & JOB_SILENT) && !shutUp) { 841 if (commandShell->hasEchoCtl) { 842 DBPRINTF("%s\n", commandShell->echoOff); 843 } 844 DBPRINTF(commandShell->errCheck, escCmd); 845 shutUp = TRUE; 846 } else { 847 if (!shutUp) { 848 DBPRINTF(commandShell->errCheck, escCmd); 849 } 850 } 851 cmdTemplate = commandShell->ignErr; 852 /* 853 * The error ignoration (hee hee) is already taken care 854 * of by the ignErr template, so pretend error checking 855 * is still on. 856 */ 857 errOff = FALSE; 858 } else { 859 errOff = FALSE; 860 } 861 } else { 862 errOff = FALSE; 863 } 864 } else { 865 866 /* 867 * If errors are being checked and the shell doesn't have error control 868 * but does supply an errOut template, then setup commands to run 869 * through it. 870 */ 871 872 if (!commandShell->hasErrCtl && commandShell->errOut && 873 (*commandShell->errOut != '\0')) { 874 if (!(job->flags & JOB_SILENT) && !shutUp) { 875 if (commandShell->hasEchoCtl) { 876 DBPRINTF("%s\n", commandShell->echoOff); 877 } 878 DBPRINTF(commandShell->errCheck, escCmd); 879 shutUp = TRUE; 880 } 881 /* If it's a comment line or blank, treat as an ignored error */ 882 if ((escCmd[0] == commandShell->commentChar) || 883 (escCmd[0] == 0)) 884 cmdTemplate = commandShell->ignErr; 885 else 886 cmdTemplate = commandShell->errOut; 887 errOff = FALSE; 888 } 889 } 890 891 if (DEBUG(SHELL) && strcmp(shellName, "sh") == 0 && 892 (job->flags & JOB_TRACED) == 0) { 893 DBPRINTF("set -%s\n", "x"); 894 job->flags |= JOB_TRACED; 895 } 896 897 DBPRINTF(cmdTemplate, cmd); 898 free(cmdStart); 899 free(escCmd); 900 if (errOff) { 901 /* 902 * If echoing is already off, there's no point in issuing the 903 * echoOff command. Otherwise we issue it and pretend it was on 904 * for the whole command... 905 */ 906 if (!shutUp && !(job->flags & JOB_SILENT) && commandShell->hasEchoCtl){ 907 DBPRINTF("%s\n", commandShell->echoOff); 908 shutUp = TRUE; 909 } 910 DBPRINTF("%s\n", commandShell->errCheck); 911 } 912 if (shutUp && commandShell->hasEchoCtl) { 913 DBPRINTF("%s\n", commandShell->echoOn); 914 } 915 return 0; 916 } 917 918 /*- 919 *----------------------------------------------------------------------- 920 * JobSaveCommand -- 921 * Save a command to be executed when everything else is done. 922 * Callback function for JobFinish... 923 * 924 * Results: 925 * Always returns 0 926 * 927 * Side Effects: 928 * The command is tacked onto the end of postCommands's commands list. 929 * 930 *----------------------------------------------------------------------- 931 */ 932 static int 933 JobSaveCommand(void *cmd, void *gn) 934 { 935 cmd = Var_Subst(NULL, (char *)cmd, (GNode *)gn, VARF_WANTRES); 936 (void)Lst_AtEnd(postCommands->commands, cmd); 937 return(0); 938 } 939 940 941 /*- 942 *----------------------------------------------------------------------- 943 * JobClose -- 944 * Called to close both input and output pipes when a job is finished. 945 * 946 * Results: 947 * Nada 948 * 949 * Side Effects: 950 * The file descriptors associated with the job are closed. 951 * 952 *----------------------------------------------------------------------- 953 */ 954 static void 955 JobClose(Job *job) 956 { 957 clearfd(job); 958 (void)close(job->outPipe); 959 job->outPipe = -1; 960 961 JobDoOutput(job, TRUE); 962 (void)close(job->inPipe); 963 job->inPipe = -1; 964 } 965 966 /*- 967 *----------------------------------------------------------------------- 968 * JobFinish -- 969 * Do final processing for the given job including updating 970 * parents and starting new jobs as available/necessary. Note 971 * that we pay no attention to the JOB_IGNERR flag here. 972 * This is because when we're called because of a noexecute flag 973 * or something, jstat.w_status is 0 and when called from 974 * Job_CatchChildren, the status is zeroed if it s/b ignored. 975 * 976 * Input: 977 * job job to finish 978 * status sub-why job went away 979 * 980 * Results: 981 * None 982 * 983 * Side Effects: 984 * Final commands for the job are placed on postCommands. 985 * 986 * If we got an error and are aborting (aborting == ABORT_ERROR) and 987 * the job list is now empty, we are done for the day. 988 * If we recognized an error (errors !=0), we set the aborting flag 989 * to ABORT_ERROR so no more jobs will be started. 990 *----------------------------------------------------------------------- 991 */ 992 /*ARGSUSED*/ 993 static void 994 JobFinish (Job *job, WAIT_T status) 995 { 996 Boolean done, return_job_token; 997 998 if (DEBUG(JOB)) { 999 fprintf(debug_file, "Jobfinish: %d [%s], status %d\n", 1000 job->pid, job->node->name, status); 1001 } 1002 1003 if ((WIFEXITED(status) && 1004 (((WEXITSTATUS(status) != 0) && !(job->flags & JOB_IGNERR)))) || 1005 WIFSIGNALED(status)) 1006 { 1007 /* 1008 * If it exited non-zero and either we're doing things our 1009 * way or we're not ignoring errors, the job is finished. 1010 * Similarly, if the shell died because of a signal 1011 * the job is also finished. In these 1012 * cases, finish out the job's output before printing the exit 1013 * status... 1014 */ 1015 JobClose(job); 1016 if (job->cmdFILE != NULL && job->cmdFILE != stdout) { 1017 (void)fclose(job->cmdFILE); 1018 job->cmdFILE = NULL; 1019 } 1020 done = TRUE; 1021 } else if (WIFEXITED(status)) { 1022 /* 1023 * Deal with ignored errors in -B mode. We need to print a message 1024 * telling of the ignored error as well as setting status.w_status 1025 * to 0 so the next command gets run. To do this, we set done to be 1026 * TRUE if in -B mode and the job exited non-zero. 1027 */ 1028 done = WEXITSTATUS(status) != 0; 1029 /* 1030 * Old comment said: "Note we don't 1031 * want to close down any of the streams until we know we're at the 1032 * end." 1033 * But we do. Otherwise when are we going to print the rest of the 1034 * stuff? 1035 */ 1036 JobClose(job); 1037 } else { 1038 /* 1039 * No need to close things down or anything. 1040 */ 1041 done = FALSE; 1042 } 1043 1044 if (done) { 1045 if (WIFEXITED(status)) { 1046 if (DEBUG(JOB)) { 1047 (void)fprintf(debug_file, "Process %d [%s] exited.\n", 1048 job->pid, job->node->name); 1049 } 1050 if (WEXITSTATUS(status) != 0) { 1051 if (job->node != lastNode) { 1052 MESSAGE(stdout, job->node); 1053 lastNode = job->node; 1054 } 1055 #ifdef USE_META 1056 if (useMeta) { 1057 meta_job_error(job, job->node, job->flags, WEXITSTATUS(status)); 1058 } 1059 #endif 1060 (void)printf("*** [%s] Error code %d%s\n", 1061 job->node->name, 1062 WEXITSTATUS(status), 1063 (job->flags & JOB_IGNERR) ? " (ignored)" : ""); 1064 if (job->flags & JOB_IGNERR) { 1065 WAIT_STATUS(status) = 0; 1066 } else { 1067 if (deleteOnError) { 1068 JobDeleteTarget(job->node); 1069 } 1070 PrintOnError(job->node, NULL); 1071 } 1072 } else if (DEBUG(JOB)) { 1073 if (job->node != lastNode) { 1074 MESSAGE(stdout, job->node); 1075 lastNode = job->node; 1076 } 1077 (void)printf("*** [%s] Completed successfully\n", 1078 job->node->name); 1079 } 1080 } else { 1081 if (job->node != lastNode) { 1082 MESSAGE(stdout, job->node); 1083 lastNode = job->node; 1084 } 1085 (void)printf("*** [%s] Signal %d\n", 1086 job->node->name, WTERMSIG(status)); 1087 if (deleteOnError) { 1088 JobDeleteTarget(job->node); 1089 } 1090 } 1091 (void)fflush(stdout); 1092 } 1093 1094 #ifdef USE_META 1095 if (useMeta) { 1096 int x; 1097 1098 if ((x = meta_job_finish(job)) != 0 && status == 0) { 1099 status = x; 1100 } 1101 } 1102 #endif 1103 1104 return_job_token = FALSE; 1105 1106 Trace_Log(JOBEND, job); 1107 if (!(job->flags & JOB_SPECIAL)) { 1108 if ((WAIT_STATUS(status) != 0) || 1109 (aborting == ABORT_ERROR) || 1110 (aborting == ABORT_INTERRUPT)) 1111 return_job_token = TRUE; 1112 } 1113 1114 if ((aborting != ABORT_ERROR) && (aborting != ABORT_INTERRUPT) && 1115 (WAIT_STATUS(status) == 0)) { 1116 /* 1117 * As long as we aren't aborting and the job didn't return a non-zero 1118 * status that we shouldn't ignore, we call Make_Update to update 1119 * the parents. In addition, any saved commands for the node are placed 1120 * on the .END target. 1121 */ 1122 if (job->tailCmds != NULL) { 1123 Lst_ForEachFrom(job->node->commands, job->tailCmds, 1124 JobSaveCommand, 1125 job->node); 1126 } 1127 job->node->made = MADE; 1128 if (!(job->flags & JOB_SPECIAL)) 1129 return_job_token = TRUE; 1130 Make_Update(job->node); 1131 job->job_state = JOB_ST_FREE; 1132 } else if (WAIT_STATUS(status)) { 1133 errors += 1; 1134 job->job_state = JOB_ST_FREE; 1135 } 1136 1137 /* 1138 * Set aborting if any error. 1139 */ 1140 if (errors && !keepgoing && (aborting != ABORT_INTERRUPT)) { 1141 /* 1142 * If we found any errors in this batch of children and the -k flag 1143 * wasn't given, we set the aborting flag so no more jobs get 1144 * started. 1145 */ 1146 aborting = ABORT_ERROR; 1147 } 1148 1149 if (return_job_token) 1150 Job_TokenReturn(); 1151 1152 if (aborting == ABORT_ERROR && jobTokensRunning == 0) { 1153 /* 1154 * If we are aborting and the job table is now empty, we finish. 1155 */ 1156 Finish(errors); 1157 } 1158 } 1159 1160 /*- 1161 *----------------------------------------------------------------------- 1162 * Job_Touch -- 1163 * Touch the given target. Called by JobStart when the -t flag was 1164 * given 1165 * 1166 * Input: 1167 * gn the node of the file to touch 1168 * silent TRUE if should not print message 1169 * 1170 * Results: 1171 * None 1172 * 1173 * Side Effects: 1174 * The data modification of the file is changed. In addition, if the 1175 * file did not exist, it is created. 1176 *----------------------------------------------------------------------- 1177 */ 1178 void 1179 Job_Touch(GNode *gn, Boolean silent) 1180 { 1181 int streamID; /* ID of stream opened to do the touch */ 1182 struct utimbuf times; /* Times for utime() call */ 1183 1184 if (gn->type & (OP_JOIN|OP_USE|OP_USEBEFORE|OP_EXEC|OP_OPTIONAL| 1185 OP_SPECIAL|OP_PHONY)) { 1186 /* 1187 * .JOIN, .USE, .ZEROTIME and .OPTIONAL targets are "virtual" targets 1188 * and, as such, shouldn't really be created. 1189 */ 1190 return; 1191 } 1192 1193 if (!silent || NoExecute(gn)) { 1194 (void)fprintf(stdout, "touch %s\n", gn->name); 1195 (void)fflush(stdout); 1196 } 1197 1198 if (NoExecute(gn)) { 1199 return; 1200 } 1201 1202 if (gn->type & OP_ARCHV) { 1203 Arch_Touch(gn); 1204 } else if (gn->type & OP_LIB) { 1205 Arch_TouchLib(gn); 1206 } else { 1207 char *file = gn->path ? gn->path : gn->name; 1208 1209 times.actime = times.modtime = now; 1210 if (utime(file, ×) < 0){ 1211 streamID = open(file, O_RDWR | O_CREAT, 0666); 1212 1213 if (streamID >= 0) { 1214 char c; 1215 1216 /* 1217 * Read and write a byte to the file to change the 1218 * modification time, then close the file. 1219 */ 1220 if (read(streamID, &c, 1) == 1) { 1221 (void)lseek(streamID, (off_t)0, SEEK_SET); 1222 while (write(streamID, &c, 1) == -1 && errno == EAGAIN) 1223 continue; 1224 } 1225 1226 (void)close(streamID); 1227 } else { 1228 (void)fprintf(stdout, "*** couldn't touch %s: %s", 1229 file, strerror(errno)); 1230 (void)fflush(stdout); 1231 } 1232 } 1233 } 1234 } 1235 1236 /*- 1237 *----------------------------------------------------------------------- 1238 * Job_CheckCommands -- 1239 * Make sure the given node has all the commands it needs. 1240 * 1241 * Input: 1242 * gn The target whose commands need verifying 1243 * abortProc Function to abort with message 1244 * 1245 * Results: 1246 * TRUE if the commands list is/was ok. 1247 * 1248 * Side Effects: 1249 * The node will have commands from the .DEFAULT rule added to it 1250 * if it needs them. 1251 *----------------------------------------------------------------------- 1252 */ 1253 Boolean 1254 Job_CheckCommands(GNode *gn, void (*abortProc)(const char *, ...)) 1255 { 1256 if (OP_NOP(gn->type) && Lst_IsEmpty(gn->commands) && 1257 ((gn->type & OP_LIB) == 0 || Lst_IsEmpty(gn->children))) { 1258 /* 1259 * No commands. Look for .DEFAULT rule from which we might infer 1260 * commands 1261 */ 1262 if ((DEFAULT != NULL) && !Lst_IsEmpty(DEFAULT->commands) && 1263 (gn->type & OP_SPECIAL) == 0) { 1264 char *p1; 1265 /* 1266 * Make only looks for a .DEFAULT if the node was never the 1267 * target of an operator, so that's what we do too. If 1268 * a .DEFAULT was given, we substitute its commands for gn's 1269 * commands and set the IMPSRC variable to be the target's name 1270 * The DEFAULT node acts like a transformation rule, in that 1271 * gn also inherits any attributes or sources attached to 1272 * .DEFAULT itself. 1273 */ 1274 Make_HandleUse(DEFAULT, gn); 1275 Var_Set(IMPSRC, Var_Value(TARGET, gn, &p1), gn, 0); 1276 free(p1); 1277 } else if (Dir_MTime(gn, 0) == 0 && (gn->type & OP_SPECIAL) == 0) { 1278 /* 1279 * The node wasn't the target of an operator we have no .DEFAULT 1280 * rule to go on and the target doesn't already exist. There's 1281 * nothing more we can do for this branch. If the -k flag wasn't 1282 * given, we stop in our tracks, otherwise we just don't update 1283 * this node's parents so they never get examined. 1284 */ 1285 static const char msg[] = ": don't know how to make"; 1286 1287 if (gn->flags & FROM_DEPEND) { 1288 if (!Job_RunTarget(".STALE", gn->fname)) 1289 fprintf(stdout, "%s: %s, %d: ignoring stale %s for %s\n", 1290 progname, gn->fname, gn->lineno, makeDependfile, 1291 gn->name); 1292 return TRUE; 1293 } 1294 1295 if (gn->type & OP_OPTIONAL) { 1296 (void)fprintf(stdout, "%s%s %s (ignored)\n", progname, 1297 msg, gn->name); 1298 (void)fflush(stdout); 1299 } else if (keepgoing) { 1300 (void)fprintf(stdout, "%s%s %s (continuing)\n", progname, 1301 msg, gn->name); 1302 (void)fflush(stdout); 1303 return FALSE; 1304 } else { 1305 (*abortProc)("%s%s %s. Stop", progname, msg, gn->name); 1306 return FALSE; 1307 } 1308 } 1309 } 1310 return TRUE; 1311 } 1312 1313 /*- 1314 *----------------------------------------------------------------------- 1315 * JobExec -- 1316 * Execute the shell for the given job. Called from JobStart 1317 * 1318 * Input: 1319 * job Job to execute 1320 * 1321 * Results: 1322 * None. 1323 * 1324 * Side Effects: 1325 * A shell is executed, outputs is altered and the Job structure added 1326 * to the job table. 1327 * 1328 *----------------------------------------------------------------------- 1329 */ 1330 static void 1331 JobExec(Job *job, char **argv) 1332 { 1333 int cpid; /* ID of new child */ 1334 sigset_t mask; 1335 1336 job->flags &= ~JOB_TRACED; 1337 1338 if (DEBUG(JOB)) { 1339 int i; 1340 1341 (void)fprintf(debug_file, "Running %s %sly\n", job->node->name, "local"); 1342 (void)fprintf(debug_file, "\tCommand: "); 1343 for (i = 0; argv[i] != NULL; i++) { 1344 (void)fprintf(debug_file, "%s ", argv[i]); 1345 } 1346 (void)fprintf(debug_file, "\n"); 1347 } 1348 1349 /* 1350 * Some jobs produce no output and it's disconcerting to have 1351 * no feedback of their running (since they produce no output, the 1352 * banner with their name in it never appears). This is an attempt to 1353 * provide that feedback, even if nothing follows it. 1354 */ 1355 if ((lastNode != job->node) && !(job->flags & JOB_SILENT)) { 1356 MESSAGE(stdout, job->node); 1357 lastNode = job->node; 1358 } 1359 1360 /* No interruptions until this job is on the `jobs' list */ 1361 JobSigLock(&mask); 1362 1363 /* Pre-emptively mark job running, pid still zero though */ 1364 job->job_state = JOB_ST_RUNNING; 1365 1366 cpid = vFork(); 1367 if (cpid == -1) 1368 Punt("Cannot vfork: %s", strerror(errno)); 1369 1370 if (cpid == 0) { 1371 /* Child */ 1372 sigset_t tmask; 1373 1374 #ifdef USE_META 1375 if (useMeta) { 1376 meta_job_child(job); 1377 } 1378 #endif 1379 /* 1380 * Reset all signal handlers; this is necessary because we also 1381 * need to unblock signals before we exec(2). 1382 */ 1383 JobSigReset(); 1384 1385 /* Now unblock signals */ 1386 sigemptyset(&tmask); 1387 JobSigUnlock(&tmask); 1388 1389 /* 1390 * Must duplicate the input stream down to the child's input and 1391 * reset it to the beginning (again). Since the stream was marked 1392 * close-on-exec, we must clear that bit in the new input. 1393 */ 1394 if (dup2(FILENO(job->cmdFILE), 0) == -1) { 1395 execError("dup2", "job->cmdFILE"); 1396 _exit(1); 1397 } 1398 (void)fcntl(0, F_SETFD, 0); 1399 (void)lseek(0, (off_t)0, SEEK_SET); 1400 1401 if (Always_pass_job_queue || 1402 (job->node->type & (OP_MAKE | OP_SUBMAKE))) { 1403 /* 1404 * Pass job token pipe to submakes. 1405 */ 1406 fcntl(tokenWaitJob.inPipe, F_SETFD, 0); 1407 fcntl(tokenWaitJob.outPipe, F_SETFD, 0); 1408 } 1409 1410 /* 1411 * Set up the child's output to be routed through the pipe 1412 * we've created for it. 1413 */ 1414 if (dup2(job->outPipe, 1) == -1) { 1415 execError("dup2", "job->outPipe"); 1416 _exit(1); 1417 } 1418 /* 1419 * The output channels are marked close on exec. This bit was 1420 * duplicated by the dup2(on some systems), so we have to clear 1421 * it before routing the shell's error output to the same place as 1422 * its standard output. 1423 */ 1424 (void)fcntl(1, F_SETFD, 0); 1425 if (dup2(1, 2) == -1) { 1426 execError("dup2", "1, 2"); 1427 _exit(1); 1428 } 1429 1430 /* 1431 * We want to switch the child into a different process family so 1432 * we can kill it and all its descendants in one fell swoop, 1433 * by killing its process family, but not commit suicide. 1434 */ 1435 #if defined(HAVE_SETPGID) 1436 (void)setpgid(0, getpid()); 1437 #else 1438 #if defined(HAVE_SETSID) 1439 /* XXX: dsl - I'm sure this should be setpgrp()... */ 1440 (void)setsid(); 1441 #else 1442 (void)setpgrp(0, getpid()); 1443 #endif 1444 #endif 1445 1446 Var_ExportVars(); 1447 1448 (void)execv(shellPath, argv); 1449 execError("exec", shellPath); 1450 _exit(1); 1451 } 1452 1453 /* Parent, continuing after the child exec */ 1454 job->pid = cpid; 1455 1456 Trace_Log(JOBSTART, job); 1457 1458 /* 1459 * Set the current position in the buffer to the beginning 1460 * and mark another stream to watch in the outputs mask 1461 */ 1462 job->curPos = 0; 1463 1464 watchfd(job); 1465 1466 if (job->cmdFILE != NULL && job->cmdFILE != stdout) { 1467 (void)fclose(job->cmdFILE); 1468 job->cmdFILE = NULL; 1469 } 1470 1471 /* 1472 * Now the job is actually running, add it to the table. 1473 */ 1474 if (DEBUG(JOB)) { 1475 fprintf(debug_file, "JobExec(%s): pid %d added to jobs table\n", 1476 job->node->name, job->pid); 1477 job_table_dump("job started"); 1478 } 1479 JobSigUnlock(&mask); 1480 } 1481 1482 /*- 1483 *----------------------------------------------------------------------- 1484 * JobMakeArgv -- 1485 * Create the argv needed to execute the shell for a given job. 1486 * 1487 * 1488 * Results: 1489 * 1490 * Side Effects: 1491 * 1492 *----------------------------------------------------------------------- 1493 */ 1494 static void 1495 JobMakeArgv(Job *job, char **argv) 1496 { 1497 int argc; 1498 static char args[10]; /* For merged arguments */ 1499 1500 argv[0] = UNCONST(shellName); 1501 argc = 1; 1502 1503 if ((commandShell->exit && (*commandShell->exit != '-')) || 1504 (commandShell->echo && (*commandShell->echo != '-'))) 1505 { 1506 /* 1507 * At least one of the flags doesn't have a minus before it, so 1508 * merge them together. Have to do this because the *(&(@*#*&#$# 1509 * Bourne shell thinks its second argument is a file to source. 1510 * Grrrr. Note the ten-character limitation on the combined arguments. 1511 */ 1512 (void)snprintf(args, sizeof(args), "-%s%s", 1513 ((job->flags & JOB_IGNERR) ? "" : 1514 (commandShell->exit ? commandShell->exit : "")), 1515 ((job->flags & JOB_SILENT) ? "" : 1516 (commandShell->echo ? commandShell->echo : ""))); 1517 1518 if (args[1]) { 1519 argv[argc] = args; 1520 argc++; 1521 } 1522 } else { 1523 if (!(job->flags & JOB_IGNERR) && commandShell->exit) { 1524 argv[argc] = UNCONST(commandShell->exit); 1525 argc++; 1526 } 1527 if (!(job->flags & JOB_SILENT) && commandShell->echo) { 1528 argv[argc] = UNCONST(commandShell->echo); 1529 argc++; 1530 } 1531 } 1532 argv[argc] = NULL; 1533 } 1534 1535 /*- 1536 *----------------------------------------------------------------------- 1537 * JobStart -- 1538 * Start a target-creation process going for the target described 1539 * by the graph node gn. 1540 * 1541 * Input: 1542 * gn target to create 1543 * flags flags for the job to override normal ones. 1544 * e.g. JOB_SPECIAL or JOB_IGNDOTS 1545 * previous The previous Job structure for this node, if any. 1546 * 1547 * Results: 1548 * JOB_ERROR if there was an error in the commands, JOB_FINISHED 1549 * if there isn't actually anything left to do for the job and 1550 * JOB_RUNNING if the job has been started. 1551 * 1552 * Side Effects: 1553 * A new Job node is created and added to the list of running 1554 * jobs. PMake is forked and a child shell created. 1555 * 1556 * NB: I'm fairly sure that this code is never called with JOB_SPECIAL set 1557 * JOB_IGNDOTS is never set (dsl) 1558 * Also the return value is ignored by everyone. 1559 *----------------------------------------------------------------------- 1560 */ 1561 static int 1562 JobStart(GNode *gn, int flags) 1563 { 1564 Job *job; /* new job descriptor */ 1565 char *argv[10]; /* Argument vector to shell */ 1566 Boolean cmdsOK; /* true if the nodes commands were all right */ 1567 Boolean noExec; /* Set true if we decide not to run the job */ 1568 int tfd; /* File descriptor to the temp file */ 1569 1570 for (job = job_table; job < job_table_end; job++) { 1571 if (job->job_state == JOB_ST_FREE) 1572 break; 1573 } 1574 if (job >= job_table_end) 1575 Punt("JobStart no job slots vacant"); 1576 1577 memset(job, 0, sizeof *job); 1578 job->job_state = JOB_ST_SETUP; 1579 if (gn->type & OP_SPECIAL) 1580 flags |= JOB_SPECIAL; 1581 1582 job->node = gn; 1583 job->tailCmds = NULL; 1584 1585 /* 1586 * Set the initial value of the flags for this job based on the global 1587 * ones and the node's attributes... Any flags supplied by the caller 1588 * are also added to the field. 1589 */ 1590 job->flags = 0; 1591 if (Targ_Ignore(gn)) { 1592 job->flags |= JOB_IGNERR; 1593 } 1594 if (Targ_Silent(gn)) { 1595 job->flags |= JOB_SILENT; 1596 } 1597 job->flags |= flags; 1598 1599 /* 1600 * Check the commands now so any attributes from .DEFAULT have a chance 1601 * to migrate to the node 1602 */ 1603 cmdsOK = Job_CheckCommands(gn, Error); 1604 1605 job->inPollfd = NULL; 1606 /* 1607 * If the -n flag wasn't given, we open up OUR (not the child's) 1608 * temporary file to stuff commands in it. The thing is rd/wr so we don't 1609 * need to reopen it to feed it to the shell. If the -n flag *was* given, 1610 * we just set the file to be stdout. Cute, huh? 1611 */ 1612 if (((gn->type & OP_MAKE) && !(noRecursiveExecute)) || 1613 (!noExecute && !touchFlag)) { 1614 /* 1615 * tfile is the name of a file into which all shell commands are 1616 * put. It is removed before the child shell is executed, unless 1617 * DEBUG(SCRIPT) is set. 1618 */ 1619 char *tfile; 1620 sigset_t mask; 1621 /* 1622 * We're serious here, but if the commands were bogus, we're 1623 * also dead... 1624 */ 1625 if (!cmdsOK) { 1626 PrintOnError(gn, NULL); /* provide some clue */ 1627 DieHorribly(); 1628 } 1629 1630 JobSigLock(&mask); 1631 tfd = mkTempFile(TMPPAT, &tfile); 1632 if (!DEBUG(SCRIPT)) 1633 (void)eunlink(tfile); 1634 JobSigUnlock(&mask); 1635 1636 job->cmdFILE = fdopen(tfd, "w+"); 1637 if (job->cmdFILE == NULL) { 1638 Punt("Could not fdopen %s", tfile); 1639 } 1640 (void)fcntl(FILENO(job->cmdFILE), F_SETFD, FD_CLOEXEC); 1641 /* 1642 * Send the commands to the command file, flush all its buffers then 1643 * rewind and remove the thing. 1644 */ 1645 noExec = FALSE; 1646 1647 #ifdef USE_META 1648 if (useMeta) { 1649 meta_job_start(job, gn); 1650 if (Targ_Silent(gn)) { /* might have changed */ 1651 job->flags |= JOB_SILENT; 1652 } 1653 } 1654 #endif 1655 /* 1656 * We can do all the commands at once. hooray for sanity 1657 */ 1658 numCommands = 0; 1659 Lst_ForEach(gn->commands, JobPrintCommand, job); 1660 1661 /* 1662 * If we didn't print out any commands to the shell script, 1663 * there's not much point in executing the shell, is there? 1664 */ 1665 if (numCommands == 0) { 1666 noExec = TRUE; 1667 } 1668 1669 free(tfile); 1670 } else if (NoExecute(gn)) { 1671 /* 1672 * Not executing anything -- just print all the commands to stdout 1673 * in one fell swoop. This will still set up job->tailCmds correctly. 1674 */ 1675 if (lastNode != gn) { 1676 MESSAGE(stdout, gn); 1677 lastNode = gn; 1678 } 1679 job->cmdFILE = stdout; 1680 /* 1681 * Only print the commands if they're ok, but don't die if they're 1682 * not -- just let the user know they're bad and keep going. It 1683 * doesn't do any harm in this case and may do some good. 1684 */ 1685 if (cmdsOK) { 1686 Lst_ForEach(gn->commands, JobPrintCommand, job); 1687 } 1688 /* 1689 * Don't execute the shell, thank you. 1690 */ 1691 noExec = TRUE; 1692 } else { 1693 /* 1694 * Just touch the target and note that no shell should be executed. 1695 * Set cmdFILE to stdout to make life easier. Check the commands, too, 1696 * but don't die if they're no good -- it does no harm to keep working 1697 * up the graph. 1698 */ 1699 job->cmdFILE = stdout; 1700 Job_Touch(gn, job->flags&JOB_SILENT); 1701 noExec = TRUE; 1702 } 1703 /* Just in case it isn't already... */ 1704 (void)fflush(job->cmdFILE); 1705 1706 /* 1707 * If we're not supposed to execute a shell, don't. 1708 */ 1709 if (noExec) { 1710 if (!(job->flags & JOB_SPECIAL)) 1711 Job_TokenReturn(); 1712 /* 1713 * Unlink and close the command file if we opened one 1714 */ 1715 if (job->cmdFILE != stdout) { 1716 if (job->cmdFILE != NULL) { 1717 (void)fclose(job->cmdFILE); 1718 job->cmdFILE = NULL; 1719 } 1720 } 1721 1722 /* 1723 * We only want to work our way up the graph if we aren't here because 1724 * the commands for the job were no good. 1725 */ 1726 if (cmdsOK && aborting == 0) { 1727 if (job->tailCmds != NULL) { 1728 Lst_ForEachFrom(job->node->commands, job->tailCmds, 1729 JobSaveCommand, 1730 job->node); 1731 } 1732 job->node->made = MADE; 1733 Make_Update(job->node); 1734 } 1735 job->job_state = JOB_ST_FREE; 1736 return cmdsOK ? JOB_FINISHED : JOB_ERROR; 1737 } 1738 1739 /* 1740 * Set up the control arguments to the shell. This is based on the flags 1741 * set earlier for this job. 1742 */ 1743 JobMakeArgv(job, argv); 1744 1745 /* Create the pipe by which we'll get the shell's output. */ 1746 JobCreatePipe(job, 3); 1747 1748 JobExec(job, argv); 1749 return(JOB_RUNNING); 1750 } 1751 1752 static char * 1753 JobOutput(Job *job, char *cp, char *endp, int msg) 1754 { 1755 char *ecp; 1756 1757 if (commandShell->noPrint) { 1758 ecp = Str_FindSubstring(cp, commandShell->noPrint); 1759 while (ecp != NULL) { 1760 if (cp != ecp) { 1761 *ecp = '\0'; 1762 if (!beSilent && msg && job->node != lastNode) { 1763 MESSAGE(stdout, job->node); 1764 lastNode = job->node; 1765 } 1766 /* 1767 * The only way there wouldn't be a newline after 1768 * this line is if it were the last in the buffer. 1769 * however, since the non-printable comes after it, 1770 * there must be a newline, so we don't print one. 1771 */ 1772 (void)fprintf(stdout, "%s", cp); 1773 (void)fflush(stdout); 1774 } 1775 cp = ecp + commandShell->noPLen; 1776 if (cp != endp) { 1777 /* 1778 * Still more to print, look again after skipping 1779 * the whitespace following the non-printable 1780 * command.... 1781 */ 1782 cp++; 1783 while (*cp == ' ' || *cp == '\t' || *cp == '\n') { 1784 cp++; 1785 } 1786 ecp = Str_FindSubstring(cp, commandShell->noPrint); 1787 } else { 1788 return cp; 1789 } 1790 } 1791 } 1792 return cp; 1793 } 1794 1795 /*- 1796 *----------------------------------------------------------------------- 1797 * JobDoOutput -- 1798 * This function is called at different times depending on 1799 * whether the user has specified that output is to be collected 1800 * via pipes or temporary files. In the former case, we are called 1801 * whenever there is something to read on the pipe. We collect more 1802 * output from the given job and store it in the job's outBuf. If 1803 * this makes up a line, we print it tagged by the job's identifier, 1804 * as necessary. 1805 * If output has been collected in a temporary file, we open the 1806 * file and read it line by line, transfering it to our own 1807 * output channel until the file is empty. At which point we 1808 * remove the temporary file. 1809 * In both cases, however, we keep our figurative eye out for the 1810 * 'noPrint' line for the shell from which the output came. If 1811 * we recognize a line, we don't print it. If the command is not 1812 * alone on the line (the character after it is not \0 or \n), we 1813 * do print whatever follows it. 1814 * 1815 * Input: 1816 * job the job whose output needs printing 1817 * finish TRUE if this is the last time we'll be called 1818 * for this job 1819 * 1820 * Results: 1821 * None 1822 * 1823 * Side Effects: 1824 * curPos may be shifted as may the contents of outBuf. 1825 *----------------------------------------------------------------------- 1826 */ 1827 STATIC void 1828 JobDoOutput(Job *job, Boolean finish) 1829 { 1830 Boolean gotNL = FALSE; /* true if got a newline */ 1831 Boolean fbuf; /* true if our buffer filled up */ 1832 int nr; /* number of bytes read */ 1833 int i; /* auxiliary index into outBuf */ 1834 int max; /* limit for i (end of current data) */ 1835 int nRead; /* (Temporary) number of bytes read */ 1836 1837 /* 1838 * Read as many bytes as will fit in the buffer. 1839 */ 1840 end_loop: 1841 gotNL = FALSE; 1842 fbuf = FALSE; 1843 1844 nRead = read(job->inPipe, &job->outBuf[job->curPos], 1845 JOB_BUFSIZE - job->curPos); 1846 if (nRead < 0) { 1847 if (errno == EAGAIN) 1848 return; 1849 if (DEBUG(JOB)) { 1850 perror("JobDoOutput(piperead)"); 1851 } 1852 nr = 0; 1853 } else { 1854 nr = nRead; 1855 } 1856 1857 /* 1858 * If we hit the end-of-file (the job is dead), we must flush its 1859 * remaining output, so pretend we read a newline if there's any 1860 * output remaining in the buffer. 1861 * Also clear the 'finish' flag so we stop looping. 1862 */ 1863 if ((nr == 0) && (job->curPos != 0)) { 1864 job->outBuf[job->curPos] = '\n'; 1865 nr = 1; 1866 finish = FALSE; 1867 } else if (nr == 0) { 1868 finish = FALSE; 1869 } 1870 1871 /* 1872 * Look for the last newline in the bytes we just got. If there is 1873 * one, break out of the loop with 'i' as its index and gotNL set 1874 * TRUE. 1875 */ 1876 max = job->curPos + nr; 1877 for (i = job->curPos + nr - 1; i >= job->curPos; i--) { 1878 if (job->outBuf[i] == '\n') { 1879 gotNL = TRUE; 1880 break; 1881 } else if (job->outBuf[i] == '\0') { 1882 /* 1883 * Why? 1884 */ 1885 job->outBuf[i] = ' '; 1886 } 1887 } 1888 1889 if (!gotNL) { 1890 job->curPos += nr; 1891 if (job->curPos == JOB_BUFSIZE) { 1892 /* 1893 * If we've run out of buffer space, we have no choice 1894 * but to print the stuff. sigh. 1895 */ 1896 fbuf = TRUE; 1897 i = job->curPos; 1898 } 1899 } 1900 if (gotNL || fbuf) { 1901 /* 1902 * Need to send the output to the screen. Null terminate it 1903 * first, overwriting the newline character if there was one. 1904 * So long as the line isn't one we should filter (according 1905 * to the shell description), we print the line, preceded 1906 * by a target banner if this target isn't the same as the 1907 * one for which we last printed something. 1908 * The rest of the data in the buffer are then shifted down 1909 * to the start of the buffer and curPos is set accordingly. 1910 */ 1911 job->outBuf[i] = '\0'; 1912 if (i >= job->curPos) { 1913 char *cp; 1914 1915 cp = JobOutput(job, job->outBuf, &job->outBuf[i], FALSE); 1916 1917 /* 1918 * There's still more in that thar buffer. This time, though, 1919 * we know there's no newline at the end, so we add one of 1920 * our own free will. 1921 */ 1922 if (*cp != '\0') { 1923 if (!beSilent && job->node != lastNode) { 1924 MESSAGE(stdout, job->node); 1925 lastNode = job->node; 1926 } 1927 #ifdef USE_META 1928 if (useMeta) { 1929 meta_job_output(job, cp, gotNL ? "\n" : ""); 1930 } 1931 #endif 1932 (void)fprintf(stdout, "%s%s", cp, gotNL ? "\n" : ""); 1933 (void)fflush(stdout); 1934 } 1935 } 1936 /* 1937 * max is the last offset still in the buffer. Move any remaining 1938 * characters to the start of the buffer and update the end marker 1939 * curPos. 1940 */ 1941 if (i < max) { 1942 (void)memmove(job->outBuf, &job->outBuf[i + 1], max - (i + 1)); 1943 job->curPos = max - (i + 1); 1944 } else { 1945 assert(i == max); 1946 job->curPos = 0; 1947 } 1948 } 1949 if (finish) { 1950 /* 1951 * If the finish flag is true, we must loop until we hit 1952 * end-of-file on the pipe. This is guaranteed to happen 1953 * eventually since the other end of the pipe is now closed 1954 * (we closed it explicitly and the child has exited). When 1955 * we do get an EOF, finish will be set FALSE and we'll fall 1956 * through and out. 1957 */ 1958 goto end_loop; 1959 } 1960 } 1961 1962 static void 1963 JobRun(GNode *targ) 1964 { 1965 #ifdef notyet 1966 /* 1967 * Unfortunately it is too complicated to run .BEGIN, .END, 1968 * and .INTERRUPT job in the parallel job module. This has 1969 * the nice side effect that it avoids a lot of other problems. 1970 */ 1971 Lst lst = Lst_Init(FALSE); 1972 Lst_AtEnd(lst, targ); 1973 (void)Make_Run(lst); 1974 Lst_Destroy(lst, NULL); 1975 JobStart(targ, JOB_SPECIAL); 1976 while (jobTokensRunning) { 1977 Job_CatchOutput(); 1978 } 1979 #else 1980 Compat_Make(targ, targ); 1981 if (targ->made == ERROR) { 1982 PrintOnError(targ, "\n\nStop."); 1983 exit(1); 1984 } 1985 #endif 1986 } 1987 1988 /*- 1989 *----------------------------------------------------------------------- 1990 * Job_CatchChildren -- 1991 * Handle the exit of a child. Called from Make_Make. 1992 * 1993 * Input: 1994 * block TRUE if should block on the wait 1995 * 1996 * Results: 1997 * none. 1998 * 1999 * Side Effects: 2000 * The job descriptor is removed from the list of children. 2001 * 2002 * Notes: 2003 * We do waits, blocking or not, according to the wisdom of our 2004 * caller, until there are no more children to report. For each 2005 * job, call JobFinish to finish things off. 2006 * 2007 *----------------------------------------------------------------------- 2008 */ 2009 2010 void 2011 Job_CatchChildren(void) 2012 { 2013 int pid; /* pid of dead child */ 2014 WAIT_T status; /* Exit/termination status */ 2015 2016 /* 2017 * Don't even bother if we know there's no one around. 2018 */ 2019 if (jobTokensRunning == 0) 2020 return; 2021 2022 while ((pid = waitpid((pid_t) -1, &status, WNOHANG | WUNTRACED)) > 0) { 2023 if (DEBUG(JOB)) { 2024 (void)fprintf(debug_file, "Process %d exited/stopped status %x.\n", pid, 2025 WAIT_STATUS(status)); 2026 } 2027 JobReapChild(pid, status, TRUE); 2028 } 2029 } 2030 2031 /* 2032 * It is possible that wait[pid]() was called from elsewhere, 2033 * this lets us reap jobs regardless. 2034 */ 2035 void 2036 JobReapChild(pid_t pid, WAIT_T status, Boolean isJobs) 2037 { 2038 Job *job; /* job descriptor for dead child */ 2039 2040 /* 2041 * Don't even bother if we know there's no one around. 2042 */ 2043 if (jobTokensRunning == 0) 2044 return; 2045 2046 job = JobFindPid(pid, JOB_ST_RUNNING, isJobs); 2047 if (job == NULL) { 2048 if (isJobs) { 2049 if (!lurking_children) 2050 Error("Child (%d) status %x not in table?", pid, status); 2051 } 2052 return; /* not ours */ 2053 } 2054 if (WIFSTOPPED(status)) { 2055 if (DEBUG(JOB)) { 2056 (void)fprintf(debug_file, "Process %d (%s) stopped.\n", 2057 job->pid, job->node->name); 2058 } 2059 if (!make_suspended) { 2060 switch (WSTOPSIG(status)) { 2061 case SIGTSTP: 2062 (void)printf("*** [%s] Suspended\n", job->node->name); 2063 break; 2064 case SIGSTOP: 2065 (void)printf("*** [%s] Stopped\n", job->node->name); 2066 break; 2067 default: 2068 (void)printf("*** [%s] Stopped -- signal %d\n", 2069 job->node->name, WSTOPSIG(status)); 2070 } 2071 job->job_suspended = 1; 2072 } 2073 (void)fflush(stdout); 2074 return; 2075 } 2076 2077 job->job_state = JOB_ST_FINISHED; 2078 job->exit_status = WAIT_STATUS(status); 2079 2080 JobFinish(job, status); 2081 } 2082 2083 /*- 2084 *----------------------------------------------------------------------- 2085 * Job_CatchOutput -- 2086 * Catch the output from our children, if we're using 2087 * pipes do so. Otherwise just block time until we get a 2088 * signal(most likely a SIGCHLD) since there's no point in 2089 * just spinning when there's nothing to do and the reaping 2090 * of a child can wait for a while. 2091 * 2092 * Results: 2093 * None 2094 * 2095 * Side Effects: 2096 * Output is read from pipes if we're piping. 2097 * ----------------------------------------------------------------------- 2098 */ 2099 void 2100 Job_CatchOutput(void) 2101 { 2102 int nready; 2103 Job *job; 2104 int i; 2105 2106 (void)fflush(stdout); 2107 2108 /* The first fd in the list is the job token pipe */ 2109 do { 2110 nready = poll(fds + 1 - wantToken, nfds - 1 + wantToken, POLL_MSEC); 2111 } while (nready < 0 && errno == EINTR); 2112 2113 if (nready < 0) 2114 Punt("poll: %s", strerror(errno)); 2115 2116 if (nready > 0 && readyfd(&childExitJob)) { 2117 char token = 0; 2118 ssize_t count; 2119 count = read(childExitJob.inPipe, &token, 1); 2120 switch (count) { 2121 case 0: 2122 Punt("unexpected eof on token pipe"); 2123 case -1: 2124 Punt("token pipe read: %s", strerror(errno)); 2125 case 1: 2126 if (token == DO_JOB_RESUME[0]) 2127 /* Complete relay requested from our SIGCONT handler */ 2128 JobRestartJobs(); 2129 break; 2130 default: 2131 abort(); 2132 } 2133 --nready; 2134 } 2135 2136 Job_CatchChildren(); 2137 if (nready == 0) 2138 return; 2139 2140 for (i = 2; i < nfds; i++) { 2141 if (!fds[i].revents) 2142 continue; 2143 job = jobfds[i]; 2144 if (job->job_state == JOB_ST_RUNNING) 2145 JobDoOutput(job, FALSE); 2146 if (--nready == 0) 2147 return; 2148 } 2149 } 2150 2151 /*- 2152 *----------------------------------------------------------------------- 2153 * Job_Make -- 2154 * Start the creation of a target. Basically a front-end for 2155 * JobStart used by the Make module. 2156 * 2157 * Results: 2158 * None. 2159 * 2160 * Side Effects: 2161 * Another job is started. 2162 * 2163 *----------------------------------------------------------------------- 2164 */ 2165 void 2166 Job_Make(GNode *gn) 2167 { 2168 (void)JobStart(gn, 0); 2169 } 2170 2171 void 2172 Shell_Init(void) 2173 { 2174 if (shellPath == NULL) { 2175 /* 2176 * We are using the default shell, which may be an absolute 2177 * path if DEFSHELL_CUSTOM is defined. 2178 */ 2179 shellName = commandShell->name; 2180 #ifdef DEFSHELL_CUSTOM 2181 if (*shellName == '/') { 2182 shellPath = shellName; 2183 shellName = strrchr(shellPath, '/'); 2184 shellName++; 2185 } else 2186 #endif 2187 shellPath = str_concat(_PATH_DEFSHELLDIR, shellName, STR_ADDSLASH); 2188 } 2189 if (commandShell->exit == NULL) { 2190 commandShell->exit = ""; 2191 } 2192 if (commandShell->echo == NULL) { 2193 commandShell->echo = ""; 2194 } 2195 if (commandShell->hasErrCtl && *commandShell->exit) { 2196 if (shellErrFlag && 2197 strcmp(commandShell->exit, &shellErrFlag[1]) != 0) { 2198 free(shellErrFlag); 2199 shellErrFlag = NULL; 2200 } 2201 if (!shellErrFlag) { 2202 int n = strlen(commandShell->exit) + 2; 2203 2204 shellErrFlag = bmake_malloc(n); 2205 if (shellErrFlag) { 2206 snprintf(shellErrFlag, n, "-%s", commandShell->exit); 2207 } 2208 } 2209 } else if (shellErrFlag) { 2210 free(shellErrFlag); 2211 shellErrFlag = NULL; 2212 } 2213 } 2214 2215 /*- 2216 * Returns the string literal that is used in the current command shell 2217 * to produce a newline character. 2218 */ 2219 const char * 2220 Shell_GetNewline(void) 2221 { 2222 2223 return commandShell->newline; 2224 } 2225 2226 void 2227 Job_SetPrefix(void) 2228 { 2229 2230 if (targPrefix) { 2231 free(targPrefix); 2232 } else if (!Var_Exists(MAKE_JOB_PREFIX, VAR_GLOBAL)) { 2233 Var_Set(MAKE_JOB_PREFIX, "---", VAR_GLOBAL, 0); 2234 } 2235 2236 targPrefix = Var_Subst(NULL, "${" MAKE_JOB_PREFIX "}", 2237 VAR_GLOBAL, VARF_WANTRES); 2238 } 2239 2240 /*- 2241 *----------------------------------------------------------------------- 2242 * Job_Init -- 2243 * Initialize the process module 2244 * 2245 * Input: 2246 * 2247 * Results: 2248 * none 2249 * 2250 * Side Effects: 2251 * lists and counters are initialized 2252 *----------------------------------------------------------------------- 2253 */ 2254 void 2255 Job_Init(void) 2256 { 2257 Job_SetPrefix(); 2258 /* Allocate space for all the job info */ 2259 job_table = bmake_malloc(maxJobs * sizeof *job_table); 2260 memset(job_table, 0, maxJobs * sizeof *job_table); 2261 job_table_end = job_table + maxJobs; 2262 wantToken = 0; 2263 2264 aborting = 0; 2265 errors = 0; 2266 2267 lastNode = NULL; 2268 2269 Always_pass_job_queue = getBoolean(MAKE_ALWAYS_PASS_JOB_QUEUE, 2270 Always_pass_job_queue); 2271 2272 Job_error_token = getBoolean(MAKE_JOB_ERROR_TOKEN, Job_error_token); 2273 2274 2275 /* 2276 * There is a non-zero chance that we already have children. 2277 * eg after 'make -f- <<EOF' 2278 * Since their termination causes a 'Child (pid) not in table' message, 2279 * Collect the status of any that are already dead, and suppress the 2280 * error message if there are any undead ones. 2281 */ 2282 for (;;) { 2283 int rval, status; 2284 rval = waitpid((pid_t) -1, &status, WNOHANG); 2285 if (rval > 0) 2286 continue; 2287 if (rval == 0) 2288 lurking_children = 1; 2289 break; 2290 } 2291 2292 Shell_Init(); 2293 2294 JobCreatePipe(&childExitJob, 3); 2295 2296 /* We can only need to wait for tokens, children and output from each job */ 2297 fds = bmake_malloc(sizeof (*fds) * (2 + maxJobs)); 2298 jobfds = bmake_malloc(sizeof (*jobfds) * (2 + maxJobs)); 2299 2300 /* These are permanent entries and take slots 0 and 1 */ 2301 watchfd(&tokenWaitJob); 2302 watchfd(&childExitJob); 2303 2304 sigemptyset(&caught_signals); 2305 /* 2306 * Install a SIGCHLD handler. 2307 */ 2308 (void)bmake_signal(SIGCHLD, JobChildSig); 2309 sigaddset(&caught_signals, SIGCHLD); 2310 2311 #define ADDSIG(s,h) \ 2312 if (bmake_signal(s, SIG_IGN) != SIG_IGN) { \ 2313 sigaddset(&caught_signals, s); \ 2314 (void)bmake_signal(s, h); \ 2315 } 2316 2317 /* 2318 * Catch the four signals that POSIX specifies if they aren't ignored. 2319 * JobPassSig will take care of calling JobInterrupt if appropriate. 2320 */ 2321 ADDSIG(SIGINT, JobPassSig_int) 2322 ADDSIG(SIGHUP, JobPassSig_term) 2323 ADDSIG(SIGTERM, JobPassSig_term) 2324 ADDSIG(SIGQUIT, JobPassSig_term) 2325 2326 /* 2327 * There are additional signals that need to be caught and passed if 2328 * either the export system wants to be told directly of signals or if 2329 * we're giving each job its own process group (since then it won't get 2330 * signals from the terminal driver as we own the terminal) 2331 */ 2332 ADDSIG(SIGTSTP, JobPassSig_suspend) 2333 ADDSIG(SIGTTOU, JobPassSig_suspend) 2334 ADDSIG(SIGTTIN, JobPassSig_suspend) 2335 ADDSIG(SIGWINCH, JobCondPassSig) 2336 ADDSIG(SIGCONT, JobContinueSig) 2337 #undef ADDSIG 2338 2339 (void)Job_RunTarget(".BEGIN", NULL); 2340 postCommands = Targ_FindNode(".END", TARG_CREATE); 2341 } 2342 2343 static void JobSigReset(void) 2344 { 2345 #define DELSIG(s) \ 2346 if (sigismember(&caught_signals, s)) { \ 2347 (void)bmake_signal(s, SIG_DFL); \ 2348 } 2349 2350 DELSIG(SIGINT) 2351 DELSIG(SIGHUP) 2352 DELSIG(SIGQUIT) 2353 DELSIG(SIGTERM) 2354 DELSIG(SIGTSTP) 2355 DELSIG(SIGTTOU) 2356 DELSIG(SIGTTIN) 2357 DELSIG(SIGWINCH) 2358 DELSIG(SIGCONT) 2359 #undef DELSIG 2360 (void)bmake_signal(SIGCHLD, SIG_DFL); 2361 } 2362 2363 /*- 2364 *----------------------------------------------------------------------- 2365 * JobMatchShell -- 2366 * Find a shell in 'shells' given its name. 2367 * 2368 * Results: 2369 * A pointer to the Shell structure. 2370 * 2371 * Side Effects: 2372 * None. 2373 * 2374 *----------------------------------------------------------------------- 2375 */ 2376 static Shell * 2377 JobMatchShell(const char *name) 2378 { 2379 Shell *sh; 2380 2381 for (sh = shells; sh->name != NULL; sh++) { 2382 if (strcmp(name, sh->name) == 0) 2383 return (sh); 2384 } 2385 return NULL; 2386 } 2387 2388 /*- 2389 *----------------------------------------------------------------------- 2390 * Job_ParseShell -- 2391 * Parse a shell specification and set up commandShell, shellPath 2392 * and shellName appropriately. 2393 * 2394 * Input: 2395 * line The shell spec 2396 * 2397 * Results: 2398 * FAILURE if the specification was incorrect. 2399 * 2400 * Side Effects: 2401 * commandShell points to a Shell structure (either predefined or 2402 * created from the shell spec), shellPath is the full path of the 2403 * shell described by commandShell, while shellName is just the 2404 * final component of shellPath. 2405 * 2406 * Notes: 2407 * A shell specification consists of a .SHELL target, with dependency 2408 * operator, followed by a series of blank-separated words. Double 2409 * quotes can be used to use blanks in words. A backslash escapes 2410 * anything (most notably a double-quote and a space) and 2411 * provides the functionality it does in C. Each word consists of 2412 * keyword and value separated by an equal sign. There should be no 2413 * unnecessary spaces in the word. The keywords are as follows: 2414 * name Name of shell. 2415 * path Location of shell. 2416 * quiet Command to turn off echoing. 2417 * echo Command to turn echoing on 2418 * filter Result of turning off echoing that shouldn't be 2419 * printed. 2420 * echoFlag Flag to turn echoing on at the start 2421 * errFlag Flag to turn error checking on at the start 2422 * hasErrCtl True if shell has error checking control 2423 * newline String literal to represent a newline char 2424 * check Command to turn on error checking if hasErrCtl 2425 * is TRUE or template of command to echo a command 2426 * for which error checking is off if hasErrCtl is 2427 * FALSE. 2428 * ignore Command to turn off error checking if hasErrCtl 2429 * is TRUE or template of command to execute a 2430 * command so as to ignore any errors it returns if 2431 * hasErrCtl is FALSE. 2432 * 2433 *----------------------------------------------------------------------- 2434 */ 2435 ReturnStatus 2436 Job_ParseShell(char *line) 2437 { 2438 char **words; 2439 char **argv; 2440 int argc; 2441 char *path; 2442 Shell newShell; 2443 Boolean fullSpec = FALSE; 2444 Shell *sh; 2445 2446 while (isspace((unsigned char)*line)) { 2447 line++; 2448 } 2449 2450 free(UNCONST(shellArgv)); 2451 2452 memset(&newShell, 0, sizeof(newShell)); 2453 2454 /* 2455 * Parse the specification by keyword 2456 */ 2457 words = brk_string(line, &argc, TRUE, &path); 2458 if (words == NULL) { 2459 Error("Unterminated quoted string [%s]", line); 2460 return FAILURE; 2461 } 2462 shellArgv = path; 2463 2464 for (path = NULL, argv = words; argc != 0; argc--, argv++) { 2465 if (strncmp(*argv, "path=", 5) == 0) { 2466 path = &argv[0][5]; 2467 } else if (strncmp(*argv, "name=", 5) == 0) { 2468 newShell.name = &argv[0][5]; 2469 } else { 2470 if (strncmp(*argv, "quiet=", 6) == 0) { 2471 newShell.echoOff = &argv[0][6]; 2472 } else if (strncmp(*argv, "echo=", 5) == 0) { 2473 newShell.echoOn = &argv[0][5]; 2474 } else if (strncmp(*argv, "filter=", 7) == 0) { 2475 newShell.noPrint = &argv[0][7]; 2476 newShell.noPLen = strlen(newShell.noPrint); 2477 } else if (strncmp(*argv, "echoFlag=", 9) == 0) { 2478 newShell.echo = &argv[0][9]; 2479 } else if (strncmp(*argv, "errFlag=", 8) == 0) { 2480 newShell.exit = &argv[0][8]; 2481 } else if (strncmp(*argv, "hasErrCtl=", 10) == 0) { 2482 char c = argv[0][10]; 2483 newShell.hasErrCtl = !((c != 'Y') && (c != 'y') && 2484 (c != 'T') && (c != 't')); 2485 } else if (strncmp(*argv, "newline=", 8) == 0) { 2486 newShell.newline = &argv[0][8]; 2487 } else if (strncmp(*argv, "check=", 6) == 0) { 2488 newShell.errCheck = &argv[0][6]; 2489 } else if (strncmp(*argv, "ignore=", 7) == 0) { 2490 newShell.ignErr = &argv[0][7]; 2491 } else if (strncmp(*argv, "errout=", 7) == 0) { 2492 newShell.errOut = &argv[0][7]; 2493 } else if (strncmp(*argv, "comment=", 8) == 0) { 2494 newShell.commentChar = argv[0][8]; 2495 } else { 2496 Parse_Error(PARSE_FATAL, "Unknown keyword \"%s\"", 2497 *argv); 2498 free(words); 2499 return(FAILURE); 2500 } 2501 fullSpec = TRUE; 2502 } 2503 } 2504 2505 if (path == NULL) { 2506 /* 2507 * If no path was given, the user wants one of the pre-defined shells, 2508 * yes? So we find the one s/he wants with the help of JobMatchShell 2509 * and set things up the right way. shellPath will be set up by 2510 * Shell_Init. 2511 */ 2512 if (newShell.name == NULL) { 2513 Parse_Error(PARSE_FATAL, "Neither path nor name specified"); 2514 free(words); 2515 return(FAILURE); 2516 } else { 2517 if ((sh = JobMatchShell(newShell.name)) == NULL) { 2518 Parse_Error(PARSE_WARNING, "%s: No matching shell", 2519 newShell.name); 2520 free(words); 2521 return(FAILURE); 2522 } 2523 commandShell = sh; 2524 shellName = newShell.name; 2525 if (shellPath) { 2526 /* Shell_Init has already been called! Do it again. */ 2527 free(UNCONST(shellPath)); 2528 shellPath = NULL; 2529 Shell_Init(); 2530 } 2531 } 2532 } else { 2533 /* 2534 * The user provided a path. If s/he gave nothing else (fullSpec is 2535 * FALSE), try and find a matching shell in the ones we know of. 2536 * Else we just take the specification at its word and copy it 2537 * to a new location. In either case, we need to record the 2538 * path the user gave for the shell. 2539 */ 2540 shellPath = path; 2541 path = strrchr(path, '/'); 2542 if (path == NULL) { 2543 path = UNCONST(shellPath); 2544 } else { 2545 path += 1; 2546 } 2547 if (newShell.name != NULL) { 2548 shellName = newShell.name; 2549 } else { 2550 shellName = path; 2551 } 2552 if (!fullSpec) { 2553 if ((sh = JobMatchShell(shellName)) == NULL) { 2554 Parse_Error(PARSE_WARNING, "%s: No matching shell", 2555 shellName); 2556 free(words); 2557 return(FAILURE); 2558 } 2559 commandShell = sh; 2560 } else { 2561 commandShell = bmake_malloc(sizeof(Shell)); 2562 *commandShell = newShell; 2563 } 2564 /* this will take care of shellErrFlag */ 2565 Shell_Init(); 2566 } 2567 2568 if (commandShell->echoOn && commandShell->echoOff) { 2569 commandShell->hasEchoCtl = TRUE; 2570 } 2571 2572 if (!commandShell->hasErrCtl) { 2573 if (commandShell->errCheck == NULL) { 2574 commandShell->errCheck = ""; 2575 } 2576 if (commandShell->ignErr == NULL) { 2577 commandShell->ignErr = "%s\n"; 2578 } 2579 } 2580 2581 /* 2582 * Do not free up the words themselves, since they might be in use by the 2583 * shell specification. 2584 */ 2585 free(words); 2586 return SUCCESS; 2587 } 2588 2589 /*- 2590 *----------------------------------------------------------------------- 2591 * JobInterrupt -- 2592 * Handle the receipt of an interrupt. 2593 * 2594 * Input: 2595 * runINTERRUPT Non-zero if commands for the .INTERRUPT target 2596 * should be executed 2597 * signo signal received 2598 * 2599 * Results: 2600 * None 2601 * 2602 * Side Effects: 2603 * All children are killed. Another job will be started if the 2604 * .INTERRUPT target was given. 2605 *----------------------------------------------------------------------- 2606 */ 2607 static void 2608 JobInterrupt(int runINTERRUPT, int signo) 2609 { 2610 Job *job; /* job descriptor in that element */ 2611 GNode *interrupt; /* the node describing the .INTERRUPT target */ 2612 sigset_t mask; 2613 GNode *gn; 2614 2615 aborting = ABORT_INTERRUPT; 2616 2617 JobSigLock(&mask); 2618 2619 for (job = job_table; job < job_table_end; job++) { 2620 if (job->job_state != JOB_ST_RUNNING) 2621 continue; 2622 2623 gn = job->node; 2624 2625 JobDeleteTarget(gn); 2626 if (job->pid) { 2627 if (DEBUG(JOB)) { 2628 (void)fprintf(debug_file, 2629 "JobInterrupt passing signal %d to child %d.\n", 2630 signo, job->pid); 2631 } 2632 KILLPG(job->pid, signo); 2633 } 2634 } 2635 2636 JobSigUnlock(&mask); 2637 2638 if (runINTERRUPT && !touchFlag) { 2639 interrupt = Targ_FindNode(".INTERRUPT", TARG_NOCREATE); 2640 if (interrupt != NULL) { 2641 ignoreErrors = FALSE; 2642 JobRun(interrupt); 2643 } 2644 } 2645 Trace_Log(MAKEINTR, 0); 2646 exit(signo); 2647 } 2648 2649 /* 2650 *----------------------------------------------------------------------- 2651 * Job_Finish -- 2652 * Do final processing such as the running of the commands 2653 * attached to the .END target. 2654 * 2655 * Results: 2656 * Number of errors reported. 2657 * 2658 * Side Effects: 2659 * None. 2660 *----------------------------------------------------------------------- 2661 */ 2662 int 2663 Job_Finish(void) 2664 { 2665 if (postCommands != NULL && 2666 (!Lst_IsEmpty(postCommands->commands) || 2667 !Lst_IsEmpty(postCommands->children))) { 2668 if (errors) { 2669 Error("Errors reported so .END ignored"); 2670 } else { 2671 JobRun(postCommands); 2672 } 2673 } 2674 return(errors); 2675 } 2676 2677 /*- 2678 *----------------------------------------------------------------------- 2679 * Job_End -- 2680 * Cleanup any memory used by the jobs module 2681 * 2682 * Results: 2683 * None. 2684 * 2685 * Side Effects: 2686 * Memory is freed 2687 *----------------------------------------------------------------------- 2688 */ 2689 void 2690 Job_End(void) 2691 { 2692 #ifdef CLEANUP 2693 free(shellArgv); 2694 #endif 2695 } 2696 2697 /*- 2698 *----------------------------------------------------------------------- 2699 * Job_Wait -- 2700 * Waits for all running jobs to finish and returns. Sets 'aborting' 2701 * to ABORT_WAIT to prevent other jobs from starting. 2702 * 2703 * Results: 2704 * None. 2705 * 2706 * Side Effects: 2707 * Currently running jobs finish. 2708 * 2709 *----------------------------------------------------------------------- 2710 */ 2711 void 2712 Job_Wait(void) 2713 { 2714 aborting = ABORT_WAIT; 2715 while (jobTokensRunning != 0) { 2716 Job_CatchOutput(); 2717 } 2718 aborting = 0; 2719 } 2720 2721 /*- 2722 *----------------------------------------------------------------------- 2723 * Job_AbortAll -- 2724 * Abort all currently running jobs without handling output or anything. 2725 * This function is to be called only in the event of a major 2726 * error. Most definitely NOT to be called from JobInterrupt. 2727 * 2728 * Results: 2729 * None 2730 * 2731 * Side Effects: 2732 * All children are killed, not just the firstborn 2733 *----------------------------------------------------------------------- 2734 */ 2735 void 2736 Job_AbortAll(void) 2737 { 2738 Job *job; /* the job descriptor in that element */ 2739 WAIT_T foo; 2740 2741 aborting = ABORT_ERROR; 2742 2743 if (jobTokensRunning) { 2744 for (job = job_table; job < job_table_end; job++) { 2745 if (job->job_state != JOB_ST_RUNNING) 2746 continue; 2747 /* 2748 * kill the child process with increasingly drastic signals to make 2749 * darn sure it's dead. 2750 */ 2751 KILLPG(job->pid, SIGINT); 2752 KILLPG(job->pid, SIGKILL); 2753 } 2754 } 2755 2756 /* 2757 * Catch as many children as want to report in at first, then give up 2758 */ 2759 while (waitpid((pid_t) -1, &foo, WNOHANG) > 0) 2760 continue; 2761 } 2762 2763 2764 /*- 2765 *----------------------------------------------------------------------- 2766 * JobRestartJobs -- 2767 * Tries to restart stopped jobs if there are slots available. 2768 * Called in process context in response to a SIGCONT. 2769 * 2770 * Results: 2771 * None. 2772 * 2773 * Side Effects: 2774 * Resumes jobs. 2775 * 2776 *----------------------------------------------------------------------- 2777 */ 2778 static void 2779 JobRestartJobs(void) 2780 { 2781 Job *job; 2782 2783 for (job = job_table; job < job_table_end; job++) { 2784 if (job->job_state == JOB_ST_RUNNING && 2785 (make_suspended || job->job_suspended)) { 2786 if (DEBUG(JOB)) { 2787 (void)fprintf(debug_file, "Restarting stopped job pid %d.\n", 2788 job->pid); 2789 } 2790 if (job->job_suspended) { 2791 (void)printf("*** [%s] Continued\n", job->node->name); 2792 (void)fflush(stdout); 2793 } 2794 job->job_suspended = 0; 2795 if (KILLPG(job->pid, SIGCONT) != 0 && DEBUG(JOB)) { 2796 fprintf(debug_file, "Failed to send SIGCONT to %d\n", job->pid); 2797 } 2798 } 2799 if (job->job_state == JOB_ST_FINISHED) 2800 /* Job exit deferred after calling waitpid() in a signal handler */ 2801 JobFinish(job, job->exit_status); 2802 } 2803 make_suspended = 0; 2804 } 2805 2806 static void 2807 watchfd(Job *job) 2808 { 2809 if (job->inPollfd != NULL) 2810 Punt("Watching watched job"); 2811 2812 fds[nfds].fd = job->inPipe; 2813 fds[nfds].events = POLLIN; 2814 jobfds[nfds] = job; 2815 job->inPollfd = &fds[nfds]; 2816 nfds++; 2817 } 2818 2819 static void 2820 clearfd(Job *job) 2821 { 2822 int i; 2823 if (job->inPollfd == NULL) 2824 Punt("Unwatching unwatched job"); 2825 i = job->inPollfd - fds; 2826 nfds--; 2827 /* 2828 * Move last job in table into hole made by dead job. 2829 */ 2830 if (nfds != i) { 2831 fds[i] = fds[nfds]; 2832 jobfds[i] = jobfds[nfds]; 2833 jobfds[i]->inPollfd = &fds[i]; 2834 } 2835 job->inPollfd = NULL; 2836 } 2837 2838 static int 2839 readyfd(Job *job) 2840 { 2841 if (job->inPollfd == NULL) 2842 Punt("Polling unwatched job"); 2843 return (job->inPollfd->revents & POLLIN) != 0; 2844 } 2845 2846 /*- 2847 *----------------------------------------------------------------------- 2848 * JobTokenAdd -- 2849 * Put a token into the job pipe so that some make process can start 2850 * another job. 2851 * 2852 * Side Effects: 2853 * Allows more build jobs to be spawned somewhere. 2854 * 2855 *----------------------------------------------------------------------- 2856 */ 2857 2858 static void 2859 JobTokenAdd(void) 2860 { 2861 char tok = JOB_TOKENS[aborting], tok1; 2862 2863 if (!Job_error_token && aborting == ABORT_ERROR) { 2864 if (jobTokensRunning == 0) 2865 return; 2866 tok = '+'; /* no error token */ 2867 } 2868 2869 /* If we are depositing an error token flush everything else */ 2870 while (tok != '+' && read(tokenWaitJob.inPipe, &tok1, 1) == 1) 2871 continue; 2872 2873 if (DEBUG(JOB)) 2874 fprintf(debug_file, "(%d) aborting %d, deposit token %c\n", 2875 getpid(), aborting, tok); 2876 while (write(tokenWaitJob.outPipe, &tok, 1) == -1 && errno == EAGAIN) 2877 continue; 2878 } 2879 2880 /*- 2881 *----------------------------------------------------------------------- 2882 * Job_ServerStartTokenAdd -- 2883 * Prep the job token pipe in the root make process. 2884 * 2885 *----------------------------------------------------------------------- 2886 */ 2887 2888 void 2889 Job_ServerStart(int max_tokens, int jp_0, int jp_1) 2890 { 2891 int i; 2892 char jobarg[64]; 2893 2894 if (jp_0 >= 0 && jp_1 >= 0) { 2895 /* Pipe passed in from parent */ 2896 tokenWaitJob.inPipe = jp_0; 2897 tokenWaitJob.outPipe = jp_1; 2898 (void)fcntl(jp_0, F_SETFD, FD_CLOEXEC); 2899 (void)fcntl(jp_1, F_SETFD, FD_CLOEXEC); 2900 return; 2901 } 2902 2903 JobCreatePipe(&tokenWaitJob, 15); 2904 2905 snprintf(jobarg, sizeof(jobarg), "%d,%d", 2906 tokenWaitJob.inPipe, tokenWaitJob.outPipe); 2907 2908 Var_Append(MAKEFLAGS, "-J", VAR_GLOBAL); 2909 Var_Append(MAKEFLAGS, jobarg, VAR_GLOBAL); 2910 2911 /* 2912 * Preload the job pipe with one token per job, save the one 2913 * "extra" token for the primary job. 2914 * 2915 * XXX should clip maxJobs against PIPE_BUF -- if max_tokens is 2916 * larger than the write buffer size of the pipe, we will 2917 * deadlock here. 2918 */ 2919 for (i = 1; i < max_tokens; i++) 2920 JobTokenAdd(); 2921 } 2922 2923 /*- 2924 *----------------------------------------------------------------------- 2925 * Job_TokenReturn -- 2926 * Return a withdrawn token to the pool. 2927 * 2928 *----------------------------------------------------------------------- 2929 */ 2930 2931 void 2932 Job_TokenReturn(void) 2933 { 2934 jobTokensRunning--; 2935 if (jobTokensRunning < 0) 2936 Punt("token botch"); 2937 if (jobTokensRunning || JOB_TOKENS[aborting] != '+') 2938 JobTokenAdd(); 2939 } 2940 2941 /*- 2942 *----------------------------------------------------------------------- 2943 * Job_TokenWithdraw -- 2944 * Attempt to withdraw a token from the pool. 2945 * 2946 * Results: 2947 * Returns TRUE if a token was withdrawn, and FALSE if the pool 2948 * is currently empty. 2949 * 2950 * Side Effects: 2951 * If pool is empty, set wantToken so that we wake up 2952 * when a token is released. 2953 * 2954 *----------------------------------------------------------------------- 2955 */ 2956 2957 2958 Boolean 2959 Job_TokenWithdraw(void) 2960 { 2961 char tok, tok1; 2962 int count; 2963 2964 wantToken = 0; 2965 if (DEBUG(JOB)) 2966 fprintf(debug_file, "Job_TokenWithdraw(%d): aborting %d, running %d\n", 2967 getpid(), aborting, jobTokensRunning); 2968 2969 if (aborting || (jobTokensRunning >= maxJobs)) 2970 return FALSE; 2971 2972 count = read(tokenWaitJob.inPipe, &tok, 1); 2973 if (count == 0) 2974 Fatal("eof on job pipe!"); 2975 if (count < 0 && jobTokensRunning != 0) { 2976 if (errno != EAGAIN) { 2977 Fatal("job pipe read: %s", strerror(errno)); 2978 } 2979 if (DEBUG(JOB)) 2980 fprintf(debug_file, "(%d) blocked for token\n", getpid()); 2981 wantToken = 1; 2982 return FALSE; 2983 } 2984 2985 if (count == 1 && tok != '+') { 2986 /* make being abvorted - remove any other job tokens */ 2987 if (DEBUG(JOB)) 2988 fprintf(debug_file, "(%d) aborted by token %c\n", getpid(), tok); 2989 while (read(tokenWaitJob.inPipe, &tok1, 1) == 1) 2990 continue; 2991 /* And put the stopper back */ 2992 while (write(tokenWaitJob.outPipe, &tok, 1) == -1 && errno == EAGAIN) 2993 continue; 2994 Fatal("A failure has been detected in another branch of the parallel make"); 2995 } 2996 2997 if (count == 1 && jobTokensRunning == 0) 2998 /* We didn't want the token really */ 2999 while (write(tokenWaitJob.outPipe, &tok, 1) == -1 && errno == EAGAIN) 3000 continue; 3001 3002 jobTokensRunning++; 3003 if (DEBUG(JOB)) 3004 fprintf(debug_file, "(%d) withdrew token\n", getpid()); 3005 return TRUE; 3006 } 3007 3008 /*- 3009 *----------------------------------------------------------------------- 3010 * Job_RunTarget -- 3011 * Run the named target if found. If a filename is specified, then 3012 * set that to the sources. 3013 * 3014 * Results: 3015 * None 3016 * 3017 * Side Effects: 3018 * exits if the target fails. 3019 * 3020 *----------------------------------------------------------------------- 3021 */ 3022 Boolean 3023 Job_RunTarget(const char *target, const char *fname) { 3024 GNode *gn = Targ_FindNode(target, TARG_NOCREATE); 3025 3026 if (gn == NULL) 3027 return FALSE; 3028 3029 if (fname) 3030 Var_Set(ALLSRC, fname, gn, 0); 3031 3032 JobRun(gn); 3033 if (gn->made == ERROR) { 3034 PrintOnError(gn, "\n\nStop."); 3035 exit(1); 3036 } 3037 return TRUE; 3038 } 3039 3040 #ifdef USE_SELECT 3041 int 3042 emul_poll(struct pollfd *fd, int nfd, int timeout) 3043 { 3044 fd_set rfds, wfds; 3045 int i, maxfd, nselect, npoll; 3046 struct timeval tv, *tvp; 3047 long usecs; 3048 3049 FD_ZERO(&rfds); 3050 FD_ZERO(&wfds); 3051 3052 maxfd = -1; 3053 for (i = 0; i < nfd; i++) { 3054 fd[i].revents = 0; 3055 3056 if (fd[i].events & POLLIN) 3057 FD_SET(fd[i].fd, &rfds); 3058 3059 if (fd[i].events & POLLOUT) 3060 FD_SET(fd[i].fd, &wfds); 3061 3062 if (fd[i].fd > maxfd) 3063 maxfd = fd[i].fd; 3064 } 3065 3066 if (maxfd >= FD_SETSIZE) { 3067 Punt("Ran out of fd_set slots; " 3068 "recompile with a larger FD_SETSIZE."); 3069 } 3070 3071 if (timeout < 0) { 3072 tvp = NULL; 3073 } else { 3074 usecs = timeout * 1000; 3075 tv.tv_sec = usecs / 1000000; 3076 tv.tv_usec = usecs % 1000000; 3077 tvp = &tv; 3078 } 3079 3080 nselect = select(maxfd + 1, &rfds, &wfds, 0, tvp); 3081 3082 if (nselect <= 0) 3083 return nselect; 3084 3085 npoll = 0; 3086 for (i = 0; i < nfd; i++) { 3087 if (FD_ISSET(fd[i].fd, &rfds)) 3088 fd[i].revents |= POLLIN; 3089 3090 if (FD_ISSET(fd[i].fd, &wfds)) 3091 fd[i].revents |= POLLOUT; 3092 3093 if (fd[i].revents) 3094 npoll++; 3095 } 3096 3097 return npoll; 3098 } 3099 #endif /* USE_SELECT */ 3100