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