1 /* $NetBSD: job.c,v 1.173 2013/06/05 03:59:43 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 1.173 2013/06/05 03:59:43 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 1.173 2013/06/05 03:59:43 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 <assert.h> 146 #include <errno.h> 147 #include <fcntl.h> 148 #if !defined(USE_SELECT) && defined(HAVE_POLL_H) 149 #include <poll.h> 150 #else 151 #ifndef USE_SELECT /* no poll.h */ 152 # define USE_SELECT 153 #endif 154 #if defined(HAVE_SYS_SELECT_H) 155 # include <sys/select.h> 156 #endif 157 #endif 158 #include <signal.h> 159 #include <stdio.h> 160 #include <string.h> 161 #include <utime.h> 162 #if defined(HAVE_SYS_SOCKET_H) 163 # include <sys/socket.h> 164 #endif 165 166 #include "make.h" 167 #include "hash.h" 168 #include "dir.h" 169 #include "job.h" 170 #include "pathnames.h" 171 #include "trace.h" 172 # define STATIC static 173 174 /* 175 * error handling variables 176 */ 177 static int errors = 0; /* number of errors reported */ 178 static int aborting = 0; /* why is the make aborting? */ 179 #define ABORT_ERROR 1 /* Because of an error */ 180 #define ABORT_INTERRUPT 2 /* Because it was interrupted */ 181 #define ABORT_WAIT 3 /* Waiting for jobs to finish */ 182 #define JOB_TOKENS "+EI+" /* Token to requeue for each abort state */ 183 184 /* 185 * this tracks the number of tokens currently "out" to build jobs. 186 */ 187 int jobTokensRunning = 0; 188 int not_parallel = 0; /* set if .NOT_PARALLEL */ 189 190 /* 191 * XXX: Avoid SunOS bug... FILENO() is fp->_file, and file 192 * is a char! So when we go above 127 we turn negative! 193 */ 194 #define FILENO(a) ((unsigned) fileno(a)) 195 196 /* 197 * post-make command processing. The node postCommands is really just the 198 * .END target but we keep it around to avoid having to search for it 199 * all the time. 200 */ 201 static GNode *postCommands = NULL; 202 /* node containing commands to execute when 203 * everything else is done */ 204 static int numCommands; /* The number of commands actually printed 205 * for a target. Should this number be 206 * 0, no shell will be executed. */ 207 208 /* 209 * Return values from JobStart. 210 */ 211 #define JOB_RUNNING 0 /* Job is running */ 212 #define JOB_ERROR 1 /* Error in starting the job */ 213 #define JOB_FINISHED 2 /* The job is already finished */ 214 215 /* 216 * Descriptions for various shells. 217 * 218 * The build environment may set DEFSHELL_INDEX to one of 219 * DEFSHELL_INDEX_SH, DEFSHELL_INDEX_KSH, or DEFSHELL_INDEX_CSH, to 220 * select one of the prefedined shells as the default shell. 221 * 222 * Alternatively, the build environment may set DEFSHELL_CUSTOM to the 223 * name or the full path of a sh-compatible shell, which will be used as 224 * the default shell. 225 * 226 * ".SHELL" lines in Makefiles can choose the default shell from the 227 # set defined here, or add additional shells. 228 */ 229 230 #ifdef DEFSHELL_CUSTOM 231 #define DEFSHELL_INDEX_CUSTOM 0 232 #define DEFSHELL_INDEX_SH 1 233 #define DEFSHELL_INDEX_KSH 2 234 #define DEFSHELL_INDEX_CSH 3 235 #else /* !DEFSHELL_CUSTOM */ 236 #define DEFSHELL_INDEX_SH 0 237 #define DEFSHELL_INDEX_KSH 1 238 #define DEFSHELL_INDEX_CSH 2 239 #endif /* !DEFSHELL_CUSTOM */ 240 241 #ifndef DEFSHELL_INDEX 242 #define DEFSHELL_INDEX 0 /* DEFSHELL_INDEX_CUSTOM or DEFSHELL_INDEX_SH */ 243 #endif /* !DEFSHELL_INDEX */ 244 245 static Shell shells[] = { 246 #ifdef DEFSHELL_CUSTOM 247 /* 248 * An sh-compatible shell with a non-standard name. 249 * 250 * Keep this in sync with the "sh" description below, but avoid 251 * non-portable features that might not be supplied by all 252 * sh-compatible shells. 253 */ 254 { 255 DEFSHELL_CUSTOM, 256 FALSE, "", "", "", 0, 257 FALSE, "echo \"%s\"\n", "%s\n", "{ %s \n} || exit $?\n", "'\n'", '#', 258 "", 259 "", 260 }, 261 #endif /* DEFSHELL_CUSTOM */ 262 /* 263 * SH description. Echo control is also possible and, under 264 * sun UNIX anyway, one can even control error checking. 265 */ 266 { 267 "sh", 268 FALSE, "", "", "", 0, 269 FALSE, "echo \"%s\"\n", "%s\n", "{ %s \n} || exit $?\n", "'\n'", '#', 270 #if defined(MAKE_NATIVE) && defined(__NetBSD__) 271 "q", 272 #else 273 "", 274 #endif 275 "", 276 }, 277 /* 278 * KSH description. 279 */ 280 { 281 "ksh", 282 TRUE, "set +v", "set -v", "set +v", 6, 283 FALSE, "echo \"%s\"\n", "%s\n", "{ %s \n} || exit $?\n", "'\n'", '#', 284 "v", 285 "", 286 }, 287 /* 288 * CSH description. The csh can do echo control by playing 289 * with the setting of the 'echo' shell variable. Sadly, 290 * however, it is unable to do error control nicely. 291 */ 292 { 293 "csh", 294 TRUE, "unset verbose", "set verbose", "unset verbose", 10, 295 FALSE, "echo \"%s\"\n", "csh -c \"%s || exit 0\"\n", "", "'\\\n'", '#', 296 "v", "e", 297 }, 298 /* 299 * UNKNOWN. 300 */ 301 { 302 NULL, 303 FALSE, NULL, NULL, NULL, 0, 304 FALSE, NULL, NULL, NULL, NULL, 0, 305 NULL, NULL, 306 } 307 }; 308 static Shell *commandShell = &shells[DEFSHELL_INDEX]; /* this is the shell to 309 * which we pass all 310 * commands in the Makefile. 311 * It is set by the 312 * Job_ParseShell function */ 313 const char *shellPath = NULL, /* full pathname of 314 * executable image */ 315 *shellName = NULL; /* last component of shell */ 316 static const char *shellArgv = NULL; /* Custom shell args */ 317 318 319 STATIC Job *job_table; /* The structures that describe them */ 320 STATIC Job *job_table_end; /* job_table + maxJobs */ 321 static int wantToken; /* we want a token */ 322 static int lurking_children = 0; 323 static int make_suspended = 0; /* non-zero if we've seen a SIGTSTP (etc) */ 324 325 /* 326 * Set of descriptors of pipes connected to 327 * the output channels of children 328 */ 329 static struct pollfd *fds = NULL; 330 static Job **jobfds = NULL; 331 static int nfds = 0; 332 static void watchfd(Job *); 333 static void clearfd(Job *); 334 static int readyfd(Job *); 335 336 STATIC GNode *lastNode; /* The node for which output was most recently 337 * produced. */ 338 static char *targPrefix = NULL; /* What we print at the start of TARG_FMT */ 339 static Job tokenWaitJob; /* token wait pseudo-job */ 340 341 static Job childExitJob; /* child exit pseudo-job */ 342 #define CHILD_EXIT "." 343 #define DO_JOB_RESUME "R" 344 345 #define TARG_FMT "%s %s ---\n" /* Default format */ 346 #define MESSAGE(fp, gn) \ 347 if (maxJobs != 1) \ 348 (void)fprintf(fp, TARG_FMT, targPrefix, gn->name) 349 350 static sigset_t caught_signals; /* Set of signals we handle */ 351 #if defined(SYSV) 352 #define KILLPG(pid, sig) kill(-(pid), (sig)) 353 #else 354 #define KILLPG(pid, sig) killpg((pid), (sig)) 355 #endif 356 357 static void JobChildSig(int); 358 static void JobContinueSig(int); 359 static Job *JobFindPid(int, int, Boolean); 360 static int JobPrintCommand(void *, void *); 361 static int JobSaveCommand(void *, void *); 362 static void JobClose(Job *); 363 static void JobExec(Job *, char **); 364 static void JobMakeArgv(Job *, char **); 365 static int JobStart(GNode *, int); 366 static char *JobOutput(Job *, char *, char *, int); 367 static void JobDoOutput(Job *, Boolean); 368 static Shell *JobMatchShell(const char *); 369 static void JobInterrupt(int, int) MAKE_ATTR_DEAD; 370 static void JobRestartJobs(void); 371 static void JobTokenAdd(void); 372 static void JobSigLock(sigset_t *); 373 static void JobSigUnlock(sigset_t *); 374 static void JobSigReset(void); 375 376 const char *malloc_options="A"; 377 378 static void 379 job_table_dump(const char *where) 380 { 381 Job *job; 382 383 fprintf(debug_file, "job table @ %s\n", where); 384 for (job = job_table; job < job_table_end; job++) { 385 fprintf(debug_file, "job %d, status %d, flags %d, pid %d\n", 386 (int)(job - job_table), job->job_state, job->flags, job->pid); 387 } 388 } 389 390 /* 391 * JobSigLock/JobSigUnlock 392 * 393 * Signal lock routines to get exclusive access. Currently used to 394 * protect `jobs' and `stoppedJobs' list manipulations. 395 */ 396 static void JobSigLock(sigset_t *omaskp) 397 { 398 if (sigprocmask(SIG_BLOCK, &caught_signals, omaskp) != 0) { 399 Punt("JobSigLock: sigprocmask: %s", strerror(errno)); 400 sigemptyset(omaskp); 401 } 402 } 403 404 static void JobSigUnlock(sigset_t *omaskp) 405 { 406 (void)sigprocmask(SIG_SETMASK, omaskp, NULL); 407 } 408 409 static void 410 JobCreatePipe(Job *job, int minfd) 411 { 412 int i, fd; 413 414 if (pipe(job->jobPipe) == -1) 415 Punt("Cannot create pipe: %s", strerror(errno)); 416 417 for (i = 0; i < 2; i++) { 418 /* Avoid using low numbered fds */ 419 fd = fcntl(job->jobPipe[i], F_DUPFD, minfd); 420 if (fd != -1) { 421 close(job->jobPipe[i]); 422 job->jobPipe[i] = fd; 423 } 424 } 425 426 /* Set close-on-exec flag for both */ 427 (void)fcntl(job->jobPipe[0], F_SETFD, 1); 428 (void)fcntl(job->jobPipe[1], F_SETFD, 1); 429 430 /* 431 * We mark the input side of the pipe non-blocking; we poll(2) the 432 * pipe when we're waiting for a job token, but we might lose the 433 * race for the token when a new one becomes available, so the read 434 * from the pipe should not block. 435 */ 436 fcntl(job->jobPipe[0], F_SETFL, 437 fcntl(job->jobPipe[0], F_GETFL, 0) | O_NONBLOCK); 438 } 439 440 /*- 441 *----------------------------------------------------------------------- 442 * JobCondPassSig -- 443 * Pass a signal to a job 444 * 445 * Input: 446 * signop Signal to send it 447 * 448 * Side Effects: 449 * None, except the job may bite it. 450 * 451 *----------------------------------------------------------------------- 452 */ 453 static void 454 JobCondPassSig(int signo) 455 { 456 Job *job; 457 458 if (DEBUG(JOB)) { 459 (void)fprintf(debug_file, "JobCondPassSig(%d) called.\n", signo); 460 } 461 462 for (job = job_table; job < job_table_end; job++) { 463 if (job->job_state != JOB_ST_RUNNING) 464 continue; 465 if (DEBUG(JOB)) { 466 (void)fprintf(debug_file, 467 "JobCondPassSig passing signal %d to child %d.\n", 468 signo, job->pid); 469 } 470 KILLPG(job->pid, signo); 471 } 472 } 473 474 /*- 475 *----------------------------------------------------------------------- 476 * JobChldSig -- 477 * SIGCHLD handler. 478 * 479 * Input: 480 * signo The signal number we've received 481 * 482 * Results: 483 * None. 484 * 485 * Side Effects: 486 * Sends a token on the child exit pipe to wake us up from 487 * select()/poll(). 488 * 489 *----------------------------------------------------------------------- 490 */ 491 static void 492 JobChildSig(int signo MAKE_ATTR_UNUSED) 493 { 494 while (write(childExitJob.outPipe, CHILD_EXIT, 1) == -1 && errno == EAGAIN) 495 continue; 496 } 497 498 499 /*- 500 *----------------------------------------------------------------------- 501 * JobContinueSig -- 502 * Resume all stopped jobs. 503 * 504 * Input: 505 * signo The signal number we've received 506 * 507 * Results: 508 * None. 509 * 510 * Side Effects: 511 * Jobs start running again. 512 * 513 *----------------------------------------------------------------------- 514 */ 515 static void 516 JobContinueSig(int signo MAKE_ATTR_UNUSED) 517 { 518 /* 519 * Defer sending to SIGCONT to our stopped children until we return 520 * from the signal handler. 521 */ 522 while (write(childExitJob.outPipe, DO_JOB_RESUME, 1) == -1 && 523 errno == EAGAIN) 524 continue; 525 } 526 527 /*- 528 *----------------------------------------------------------------------- 529 * JobPassSig -- 530 * Pass a signal on to all jobs, then resend to ourselves. 531 * 532 * Input: 533 * signo The signal number we've received 534 * 535 * Results: 536 * None. 537 * 538 * Side Effects: 539 * We die by the same signal. 540 * 541 *----------------------------------------------------------------------- 542 */ 543 MAKE_ATTR_DEAD static void 544 JobPassSig_int(int signo) 545 { 546 /* Run .INTERRUPT target then exit */ 547 JobInterrupt(TRUE, signo); 548 } 549 550 MAKE_ATTR_DEAD static void 551 JobPassSig_term(int signo) 552 { 553 /* Dont run .INTERRUPT target then exit */ 554 JobInterrupt(FALSE, signo); 555 } 556 557 static void 558 JobPassSig_suspend(int signo) 559 { 560 sigset_t nmask, omask; 561 struct sigaction act; 562 563 /* Suppress job started/continued messages */ 564 make_suspended = 1; 565 566 /* Pass the signal onto every job */ 567 JobCondPassSig(signo); 568 569 /* 570 * Send ourselves the signal now we've given the message to everyone else. 571 * Note we block everything else possible while we're getting the signal. 572 * This ensures that all our jobs get continued when we wake up before 573 * we take any other signal. 574 */ 575 sigfillset(&nmask); 576 sigdelset(&nmask, signo); 577 (void)sigprocmask(SIG_SETMASK, &nmask, &omask); 578 579 act.sa_handler = SIG_DFL; 580 sigemptyset(&act.sa_mask); 581 act.sa_flags = 0; 582 (void)sigaction(signo, &act, NULL); 583 584 if (DEBUG(JOB)) { 585 (void)fprintf(debug_file, 586 "JobPassSig passing signal %d to self.\n", signo); 587 } 588 589 (void)kill(getpid(), signo); 590 591 /* 592 * We've been continued. 593 * 594 * A whole host of signals continue to happen! 595 * SIGCHLD for any processes that actually suspended themselves. 596 * SIGCHLD for any processes that exited while we were alseep. 597 * The SIGCONT that actually caused us to wakeup. 598 * 599 * Since we defer passing the SIGCONT on to our children until 600 * the main processing loop, we can be sure that all the SIGCHLD 601 * events will have happened by then - and that the waitpid() will 602 * collect the child 'suspended' events. 603 * For correct sequencing we just need to ensure we process the 604 * waitpid() before passign on the SIGCONT. 605 * 606 * In any case nothing else is needed here. 607 */ 608 609 /* Restore handler and signal mask */ 610 act.sa_handler = JobPassSig_suspend; 611 (void)sigaction(signo, &act, NULL); 612 (void)sigprocmask(SIG_SETMASK, &omask, NULL); 613 } 614 615 /*- 616 *----------------------------------------------------------------------- 617 * JobFindPid -- 618 * Compare the pid of the job with the given pid and return 0 if they 619 * are equal. This function is called from Job_CatchChildren 620 * to find the job descriptor of the finished job. 621 * 622 * Input: 623 * job job to examine 624 * pid process id desired 625 * 626 * Results: 627 * Job with matching pid 628 * 629 * Side Effects: 630 * None 631 *----------------------------------------------------------------------- 632 */ 633 static Job * 634 JobFindPid(int pid, int status, Boolean isJobs) 635 { 636 Job *job; 637 638 for (job = job_table; job < job_table_end; job++) { 639 if ((job->job_state == status) && job->pid == pid) 640 return job; 641 } 642 if (DEBUG(JOB) && isJobs) 643 job_table_dump("no pid"); 644 return NULL; 645 } 646 647 /*- 648 *----------------------------------------------------------------------- 649 * JobPrintCommand -- 650 * Put out another command for the given job. If the command starts 651 * with an @ or a - we process it specially. In the former case, 652 * so long as the -s and -n flags weren't given to make, we stick 653 * a shell-specific echoOff command in the script. In the latter, 654 * we ignore errors for the entire job, unless the shell has error 655 * control. 656 * If the command is just "..." we take all future commands for this 657 * job to be commands to be executed once the entire graph has been 658 * made and return non-zero to signal that the end of the commands 659 * was reached. These commands are later attached to the postCommands 660 * node and executed by Job_End when all things are done. 661 * This function is called from JobStart via Lst_ForEach. 662 * 663 * Input: 664 * cmdp command string to print 665 * jobp job for which to print it 666 * 667 * Results: 668 * Always 0, unless the command was "..." 669 * 670 * Side Effects: 671 * If the command begins with a '-' and the shell has no error control, 672 * the JOB_IGNERR flag is set in the job descriptor. 673 * If the command is "..." and we're not ignoring such things, 674 * tailCmds is set to the successor node of the cmd. 675 * numCommands is incremented if the command is actually printed. 676 *----------------------------------------------------------------------- 677 */ 678 static int 679 JobPrintCommand(void *cmdp, void *jobp) 680 { 681 Boolean noSpecials; /* true if we shouldn't worry about 682 * inserting special commands into 683 * the input stream. */ 684 Boolean shutUp = FALSE; /* true if we put a no echo command 685 * into the command file */ 686 Boolean errOff = FALSE; /* true if we turned error checking 687 * off before printing the command 688 * and need to turn it back on */ 689 const char *cmdTemplate; /* Template to use when printing the 690 * command */ 691 char *cmdStart; /* Start of expanded command */ 692 char *escCmd = NULL; /* Command with quotes/backticks escaped */ 693 char *cmd = (char *)cmdp; 694 Job *job = (Job *)jobp; 695 int i, j; 696 697 noSpecials = NoExecute(job->node); 698 699 if (strcmp(cmd, "...") == 0) { 700 job->node->type |= OP_SAVE_CMDS; 701 if ((job->flags & JOB_IGNDOTS) == 0) { 702 job->tailCmds = Lst_Succ(Lst_Member(job->node->commands, 703 cmd)); 704 return 1; 705 } 706 return 0; 707 } 708 709 #define DBPRINTF(fmt, arg) if (DEBUG(JOB)) { \ 710 (void)fprintf(debug_file, fmt, arg); \ 711 } \ 712 (void)fprintf(job->cmdFILE, fmt, arg); \ 713 (void)fflush(job->cmdFILE); 714 715 numCommands += 1; 716 717 cmdStart = cmd = Var_Subst(NULL, cmd, job->node, FALSE); 718 719 cmdTemplate = "%s\n"; 720 721 /* 722 * Check for leading @' and -'s to control echoing and error checking. 723 */ 724 while (*cmd == '@' || *cmd == '-' || (*cmd == '+')) { 725 switch (*cmd) { 726 case '@': 727 shutUp = DEBUG(LOUD) ? FALSE : TRUE; 728 break; 729 case '-': 730 job->flags |= JOB_IGNERR; 731 errOff = TRUE; 732 break; 733 case '+': 734 if (noSpecials) { 735 /* 736 * We're not actually executing anything... 737 * but this one needs to be - use compat mode just for it. 738 */ 739 CompatRunCommand(cmdp, job->node); 740 return 0; 741 } 742 break; 743 } 744 cmd++; 745 } 746 747 while (isspace((unsigned char) *cmd)) 748 cmd++; 749 750 /* 751 * If the shell doesn't have error control the alternate echo'ing will 752 * be done (to avoid showing additional error checking code) 753 * and this will need the characters '$ ` \ "' escaped 754 */ 755 756 if (!commandShell->hasErrCtl) { 757 /* Worst that could happen is every char needs escaping. */ 758 escCmd = bmake_malloc((strlen(cmd) * 2) + 1); 759 for (i = 0, j= 0; cmd[i] != '\0'; i++, j++) { 760 if (cmd[i] == '$' || cmd[i] == '`' || cmd[i] == '\\' || 761 cmd[i] == '"') 762 escCmd[j++] = '\\'; 763 escCmd[j] = cmd[i]; 764 } 765 escCmd[j] = 0; 766 } 767 768 if (shutUp) { 769 if (!(job->flags & JOB_SILENT) && !noSpecials && 770 commandShell->hasEchoCtl) { 771 DBPRINTF("%s\n", commandShell->echoOff); 772 } else { 773 if (commandShell->hasErrCtl) 774 shutUp = FALSE; 775 } 776 } 777 778 if (errOff) { 779 if (!noSpecials) { 780 if (commandShell->hasErrCtl) { 781 /* 782 * we don't want the error-control commands showing 783 * up either, so we turn off echoing while executing 784 * them. We could put another field in the shell 785 * structure to tell JobDoOutput to look for this 786 * string too, but why make it any more complex than 787 * it already is? 788 */ 789 if (!(job->flags & JOB_SILENT) && !shutUp && 790 commandShell->hasEchoCtl) { 791 DBPRINTF("%s\n", commandShell->echoOff); 792 DBPRINTF("%s\n", commandShell->ignErr); 793 DBPRINTF("%s\n", commandShell->echoOn); 794 } else { 795 DBPRINTF("%s\n", commandShell->ignErr); 796 } 797 } else if (commandShell->ignErr && 798 (*commandShell->ignErr != '\0')) 799 { 800 /* 801 * The shell has no error control, so we need to be 802 * weird to get it to ignore any errors from the command. 803 * If echoing is turned on, we turn it off and use the 804 * errCheck template to echo the command. Leave echoing 805 * off so the user doesn't see the weirdness we go through 806 * to ignore errors. Set cmdTemplate to use the weirdness 807 * instead of the simple "%s\n" template. 808 */ 809 if (!(job->flags & JOB_SILENT) && !shutUp) { 810 if (commandShell->hasEchoCtl) { 811 DBPRINTF("%s\n", commandShell->echoOff); 812 } 813 DBPRINTF(commandShell->errCheck, escCmd); 814 shutUp = TRUE; 815 } else { 816 if (!shutUp) { 817 DBPRINTF(commandShell->errCheck, escCmd); 818 } 819 } 820 cmdTemplate = commandShell->ignErr; 821 /* 822 * The error ignoration (hee hee) is already taken care 823 * of by the ignErr template, so pretend error checking 824 * is still on. 825 */ 826 errOff = FALSE; 827 } else { 828 errOff = FALSE; 829 } 830 } else { 831 errOff = FALSE; 832 } 833 } else { 834 835 /* 836 * If errors are being checked and the shell doesn't have error control 837 * but does supply an errOut template, then setup commands to run 838 * through it. 839 */ 840 841 if (!commandShell->hasErrCtl && commandShell->errOut && 842 (*commandShell->errOut != '\0')) { 843 if (!(job->flags & JOB_SILENT) && !shutUp) { 844 if (commandShell->hasEchoCtl) { 845 DBPRINTF("%s\n", commandShell->echoOff); 846 } 847 DBPRINTF(commandShell->errCheck, escCmd); 848 shutUp = TRUE; 849 } 850 /* If it's a comment line or blank, treat as an ignored error */ 851 if ((escCmd[0] == commandShell->commentChar) || 852 (escCmd[0] == 0)) 853 cmdTemplate = commandShell->ignErr; 854 else 855 cmdTemplate = commandShell->errOut; 856 errOff = FALSE; 857 } 858 } 859 860 if (DEBUG(SHELL) && strcmp(shellName, "sh") == 0 && 861 (job->flags & JOB_TRACED) == 0) { 862 DBPRINTF("set -%s\n", "x"); 863 job->flags |= JOB_TRACED; 864 } 865 866 DBPRINTF(cmdTemplate, cmd); 867 free(cmdStart); 868 if (escCmd) 869 free(escCmd); 870 if (errOff) { 871 /* 872 * If echoing is already off, there's no point in issuing the 873 * echoOff command. Otherwise we issue it and pretend it was on 874 * for the whole command... 875 */ 876 if (!shutUp && !(job->flags & JOB_SILENT) && commandShell->hasEchoCtl){ 877 DBPRINTF("%s\n", commandShell->echoOff); 878 shutUp = TRUE; 879 } 880 DBPRINTF("%s\n", commandShell->errCheck); 881 } 882 if (shutUp && commandShell->hasEchoCtl) { 883 DBPRINTF("%s\n", commandShell->echoOn); 884 } 885 return 0; 886 } 887 888 /*- 889 *----------------------------------------------------------------------- 890 * JobSaveCommand -- 891 * Save a command to be executed when everything else is done. 892 * Callback function for JobFinish... 893 * 894 * Results: 895 * Always returns 0 896 * 897 * Side Effects: 898 * The command is tacked onto the end of postCommands's commands list. 899 * 900 *----------------------------------------------------------------------- 901 */ 902 static int 903 JobSaveCommand(void *cmd, void *gn) 904 { 905 cmd = Var_Subst(NULL, (char *)cmd, (GNode *)gn, FALSE); 906 (void)Lst_AtEnd(postCommands->commands, cmd); 907 return(0); 908 } 909 910 911 /*- 912 *----------------------------------------------------------------------- 913 * JobClose -- 914 * Called to close both input and output pipes when a job is finished. 915 * 916 * Results: 917 * Nada 918 * 919 * Side Effects: 920 * The file descriptors associated with the job are closed. 921 * 922 *----------------------------------------------------------------------- 923 */ 924 static void 925 JobClose(Job *job) 926 { 927 clearfd(job); 928 (void)close(job->outPipe); 929 job->outPipe = -1; 930 931 JobDoOutput(job, TRUE); 932 (void)close(job->inPipe); 933 job->inPipe = -1; 934 } 935 936 /*- 937 *----------------------------------------------------------------------- 938 * JobFinish -- 939 * Do final processing for the given job including updating 940 * parents and starting new jobs as available/necessary. Note 941 * that we pay no attention to the JOB_IGNERR flag here. 942 * This is because when we're called because of a noexecute flag 943 * or something, jstat.w_status is 0 and when called from 944 * Job_CatchChildren, the status is zeroed if it s/b ignored. 945 * 946 * Input: 947 * job job to finish 948 * status sub-why job went away 949 * 950 * Results: 951 * None 952 * 953 * Side Effects: 954 * Final commands for the job are placed on postCommands. 955 * 956 * If we got an error and are aborting (aborting == ABORT_ERROR) and 957 * the job list is now empty, we are done for the day. 958 * If we recognized an error (errors !=0), we set the aborting flag 959 * to ABORT_ERROR so no more jobs will be started. 960 *----------------------------------------------------------------------- 961 */ 962 /*ARGSUSED*/ 963 static void 964 JobFinish (Job *job, WAIT_T status) 965 { 966 Boolean done, return_job_token; 967 968 if (DEBUG(JOB)) { 969 fprintf(debug_file, "Jobfinish: %d [%s], status %d\n", 970 job->pid, job->node->name, status); 971 } 972 973 if ((WIFEXITED(status) && 974 (((WEXITSTATUS(status) != 0) && !(job->flags & JOB_IGNERR)))) || 975 WIFSIGNALED(status)) 976 { 977 /* 978 * If it exited non-zero and either we're doing things our 979 * way or we're not ignoring errors, the job is finished. 980 * Similarly, if the shell died because of a signal 981 * the job is also finished. In these 982 * cases, finish out the job's output before printing the exit 983 * status... 984 */ 985 JobClose(job); 986 if (job->cmdFILE != NULL && job->cmdFILE != stdout) { 987 (void)fclose(job->cmdFILE); 988 job->cmdFILE = NULL; 989 } 990 done = TRUE; 991 } else if (WIFEXITED(status)) { 992 /* 993 * Deal with ignored errors in -B mode. We need to print a message 994 * telling of the ignored error as well as setting status.w_status 995 * to 0 so the next command gets run. To do this, we set done to be 996 * TRUE if in -B mode and the job exited non-zero. 997 */ 998 done = WEXITSTATUS(status) != 0; 999 /* 1000 * Old comment said: "Note we don't 1001 * want to close down any of the streams until we know we're at the 1002 * end." 1003 * But we do. Otherwise when are we going to print the rest of the 1004 * stuff? 1005 */ 1006 JobClose(job); 1007 } else { 1008 /* 1009 * No need to close things down or anything. 1010 */ 1011 done = FALSE; 1012 } 1013 1014 if (done) { 1015 if (WIFEXITED(status)) { 1016 if (DEBUG(JOB)) { 1017 (void)fprintf(debug_file, "Process %d [%s] exited.\n", 1018 job->pid, job->node->name); 1019 } 1020 if (WEXITSTATUS(status) != 0) { 1021 if (job->node != lastNode) { 1022 MESSAGE(stdout, job->node); 1023 lastNode = job->node; 1024 } 1025 #ifdef USE_META 1026 if (useMeta) { 1027 meta_job_error(job, job->node, job->flags, WEXITSTATUS(status)); 1028 } 1029 #endif 1030 (void)printf("*** [%s] Error code %d%s\n", 1031 job->node->name, 1032 WEXITSTATUS(status), 1033 (job->flags & JOB_IGNERR) ? " (ignored)" : ""); 1034 if (job->flags & JOB_IGNERR) { 1035 WAIT_STATUS(status) = 0; 1036 } else { 1037 PrintOnError(job->node, NULL); 1038 } 1039 } else if (DEBUG(JOB)) { 1040 if (job->node != lastNode) { 1041 MESSAGE(stdout, job->node); 1042 lastNode = job->node; 1043 } 1044 (void)printf("*** [%s] Completed successfully\n", 1045 job->node->name); 1046 } 1047 } else { 1048 if (job->node != lastNode) { 1049 MESSAGE(stdout, job->node); 1050 lastNode = job->node; 1051 } 1052 (void)printf("*** [%s] Signal %d\n", 1053 job->node->name, WTERMSIG(status)); 1054 } 1055 (void)fflush(stdout); 1056 } 1057 1058 #ifdef USE_META 1059 if (useMeta) { 1060 meta_job_finish(job); 1061 } 1062 #endif 1063 1064 return_job_token = FALSE; 1065 1066 Trace_Log(JOBEND, job); 1067 if (!(job->flags & JOB_SPECIAL)) { 1068 if ((WAIT_STATUS(status) != 0) || 1069 (aborting == ABORT_ERROR) || 1070 (aborting == ABORT_INTERRUPT)) 1071 return_job_token = TRUE; 1072 } 1073 1074 if ((aborting != ABORT_ERROR) && (aborting != ABORT_INTERRUPT) && 1075 (WAIT_STATUS(status) == 0)) { 1076 /* 1077 * As long as we aren't aborting and the job didn't return a non-zero 1078 * status that we shouldn't ignore, we call Make_Update to update 1079 * the parents. In addition, any saved commands for the node are placed 1080 * on the .END target. 1081 */ 1082 if (job->tailCmds != NULL) { 1083 Lst_ForEachFrom(job->node->commands, job->tailCmds, 1084 JobSaveCommand, 1085 job->node); 1086 } 1087 job->node->made = MADE; 1088 if (!(job->flags & JOB_SPECIAL)) 1089 return_job_token = TRUE; 1090 Make_Update(job->node); 1091 job->job_state = JOB_ST_FREE; 1092 } else if (WAIT_STATUS(status)) { 1093 errors += 1; 1094 job->job_state = JOB_ST_FREE; 1095 } 1096 1097 /* 1098 * Set aborting if any error. 1099 */ 1100 if (errors && !keepgoing && (aborting != ABORT_INTERRUPT)) { 1101 /* 1102 * If we found any errors in this batch of children and the -k flag 1103 * wasn't given, we set the aborting flag so no more jobs get 1104 * started. 1105 */ 1106 aborting = ABORT_ERROR; 1107 } 1108 1109 if (return_job_token) 1110 Job_TokenReturn(); 1111 1112 if (aborting == ABORT_ERROR && jobTokensRunning == 0) { 1113 /* 1114 * If we are aborting and the job table is now empty, we finish. 1115 */ 1116 Finish(errors); 1117 } 1118 } 1119 1120 /*- 1121 *----------------------------------------------------------------------- 1122 * Job_Touch -- 1123 * Touch the given target. Called by JobStart when the -t flag was 1124 * given 1125 * 1126 * Input: 1127 * gn the node of the file to touch 1128 * silent TRUE if should not print message 1129 * 1130 * Results: 1131 * None 1132 * 1133 * Side Effects: 1134 * The data modification of the file is changed. In addition, if the 1135 * file did not exist, it is created. 1136 *----------------------------------------------------------------------- 1137 */ 1138 void 1139 Job_Touch(GNode *gn, Boolean silent) 1140 { 1141 int streamID; /* ID of stream opened to do the touch */ 1142 struct utimbuf times; /* Times for utime() call */ 1143 1144 if (gn->type & (OP_JOIN|OP_USE|OP_USEBEFORE|OP_EXEC|OP_OPTIONAL| 1145 OP_SPECIAL|OP_PHONY)) { 1146 /* 1147 * .JOIN, .USE, .ZEROTIME and .OPTIONAL targets are "virtual" targets 1148 * and, as such, shouldn't really be created. 1149 */ 1150 return; 1151 } 1152 1153 if (!silent || NoExecute(gn)) { 1154 (void)fprintf(stdout, "touch %s\n", gn->name); 1155 (void)fflush(stdout); 1156 } 1157 1158 if (NoExecute(gn)) { 1159 return; 1160 } 1161 1162 if (gn->type & OP_ARCHV) { 1163 Arch_Touch(gn); 1164 } else if (gn->type & OP_LIB) { 1165 Arch_TouchLib(gn); 1166 } else { 1167 char *file = gn->path ? gn->path : gn->name; 1168 1169 times.actime = times.modtime = now; 1170 if (utime(file, ×) < 0){ 1171 streamID = open(file, O_RDWR | O_CREAT, 0666); 1172 1173 if (streamID >= 0) { 1174 char c; 1175 1176 /* 1177 * Read and write a byte to the file to change the 1178 * modification time, then close the file. 1179 */ 1180 if (read(streamID, &c, 1) == 1) { 1181 (void)lseek(streamID, (off_t)0, SEEK_SET); 1182 while (write(streamID, &c, 1) == -1 && errno == EAGAIN) 1183 continue; 1184 } 1185 1186 (void)close(streamID); 1187 } else { 1188 (void)fprintf(stdout, "*** couldn't touch %s: %s", 1189 file, strerror(errno)); 1190 (void)fflush(stdout); 1191 } 1192 } 1193 } 1194 } 1195 1196 /*- 1197 *----------------------------------------------------------------------- 1198 * Job_CheckCommands -- 1199 * Make sure the given node has all the commands it needs. 1200 * 1201 * Input: 1202 * gn The target whose commands need verifying 1203 * abortProc Function to abort with message 1204 * 1205 * Results: 1206 * TRUE if the commands list is/was ok. 1207 * 1208 * Side Effects: 1209 * The node will have commands from the .DEFAULT rule added to it 1210 * if it needs them. 1211 *----------------------------------------------------------------------- 1212 */ 1213 Boolean 1214 Job_CheckCommands(GNode *gn, void (*abortProc)(const char *, ...)) 1215 { 1216 if (OP_NOP(gn->type) && Lst_IsEmpty(gn->commands) && 1217 ((gn->type & OP_LIB) == 0 || Lst_IsEmpty(gn->children))) { 1218 /* 1219 * No commands. Look for .DEFAULT rule from which we might infer 1220 * commands 1221 */ 1222 if ((DEFAULT != NULL) && !Lst_IsEmpty(DEFAULT->commands) && 1223 (gn->type & OP_SPECIAL) == 0) { 1224 char *p1; 1225 /* 1226 * Make only looks for a .DEFAULT if the node was never the 1227 * target of an operator, so that's what we do too. If 1228 * a .DEFAULT was given, we substitute its commands for gn's 1229 * commands and set the IMPSRC variable to be the target's name 1230 * The DEFAULT node acts like a transformation rule, in that 1231 * gn also inherits any attributes or sources attached to 1232 * .DEFAULT itself. 1233 */ 1234 Make_HandleUse(DEFAULT, gn); 1235 Var_Set(IMPSRC, Var_Value(TARGET, gn, &p1), gn, 0); 1236 if (p1) 1237 free(p1); 1238 } else if (Dir_MTime(gn, 0) == 0 && (gn->type & OP_SPECIAL) == 0) { 1239 /* 1240 * The node wasn't the target of an operator we have no .DEFAULT 1241 * rule to go on and the target doesn't already exist. There's 1242 * nothing more we can do for this branch. If the -k flag wasn't 1243 * given, we stop in our tracks, otherwise we just don't update 1244 * this node's parents so they never get examined. 1245 */ 1246 static const char msg[] = ": don't know how to make"; 1247 1248 if (gn->flags & FROM_DEPEND) { 1249 if (!Job_RunTarget(".STALE", gn->fname)) 1250 fprintf(stdout, "%s: %s, %d: ignoring stale %s for %s\n", 1251 progname, gn->fname, gn->lineno, makeDependfile, 1252 gn->name); 1253 return TRUE; 1254 } 1255 1256 if (gn->type & OP_OPTIONAL) { 1257 (void)fprintf(stdout, "%s%s %s (ignored)\n", progname, 1258 msg, gn->name); 1259 (void)fflush(stdout); 1260 } else if (keepgoing) { 1261 (void)fprintf(stdout, "%s%s %s (continuing)\n", progname, 1262 msg, gn->name); 1263 (void)fflush(stdout); 1264 return FALSE; 1265 } else { 1266 (*abortProc)("%s%s %s. Stop", progname, msg, gn->name); 1267 return FALSE; 1268 } 1269 } 1270 } 1271 return TRUE; 1272 } 1273 1274 /*- 1275 *----------------------------------------------------------------------- 1276 * JobExec -- 1277 * Execute the shell for the given job. Called from JobStart 1278 * 1279 * Input: 1280 * job Job to execute 1281 * 1282 * Results: 1283 * None. 1284 * 1285 * Side Effects: 1286 * A shell is executed, outputs is altered and the Job structure added 1287 * to the job table. 1288 * 1289 *----------------------------------------------------------------------- 1290 */ 1291 static void 1292 JobExec(Job *job, char **argv) 1293 { 1294 int cpid; /* ID of new child */ 1295 sigset_t mask; 1296 1297 job->flags &= ~JOB_TRACED; 1298 1299 if (DEBUG(JOB)) { 1300 int i; 1301 1302 (void)fprintf(debug_file, "Running %s %sly\n", job->node->name, "local"); 1303 (void)fprintf(debug_file, "\tCommand: "); 1304 for (i = 0; argv[i] != NULL; i++) { 1305 (void)fprintf(debug_file, "%s ", argv[i]); 1306 } 1307 (void)fprintf(debug_file, "\n"); 1308 } 1309 1310 /* 1311 * Some jobs produce no output and it's disconcerting to have 1312 * no feedback of their running (since they produce no output, the 1313 * banner with their name in it never appears). This is an attempt to 1314 * provide that feedback, even if nothing follows it. 1315 */ 1316 if ((lastNode != job->node) && !(job->flags & JOB_SILENT)) { 1317 MESSAGE(stdout, job->node); 1318 lastNode = job->node; 1319 } 1320 1321 /* No interruptions until this job is on the `jobs' list */ 1322 JobSigLock(&mask); 1323 1324 /* Pre-emptively mark job running, pid still zero though */ 1325 job->job_state = JOB_ST_RUNNING; 1326 1327 cpid = vFork(); 1328 if (cpid == -1) 1329 Punt("Cannot vfork: %s", strerror(errno)); 1330 1331 if (cpid == 0) { 1332 /* Child */ 1333 sigset_t tmask; 1334 1335 #ifdef USE_META 1336 if (useMeta) { 1337 meta_job_child(job); 1338 } 1339 #endif 1340 /* 1341 * Reset all signal handlers; this is necessary because we also 1342 * need to unblock signals before we exec(2). 1343 */ 1344 JobSigReset(); 1345 1346 /* Now unblock signals */ 1347 sigemptyset(&tmask); 1348 JobSigUnlock(&tmask); 1349 1350 /* 1351 * Must duplicate the input stream down to the child's input and 1352 * reset it to the beginning (again). Since the stream was marked 1353 * close-on-exec, we must clear that bit in the new input. 1354 */ 1355 if (dup2(FILENO(job->cmdFILE), 0) == -1) { 1356 execError("dup2", "job->cmdFILE"); 1357 _exit(1); 1358 } 1359 (void)fcntl(0, F_SETFD, 0); 1360 (void)lseek(0, (off_t)0, SEEK_SET); 1361 1362 if (job->node->type & OP_MAKE) { 1363 /* 1364 * Pass job token pipe to submakes. 1365 */ 1366 fcntl(tokenWaitJob.inPipe, F_SETFD, 0); 1367 fcntl(tokenWaitJob.outPipe, F_SETFD, 0); 1368 } 1369 1370 /* 1371 * Set up the child's output to be routed through the pipe 1372 * we've created for it. 1373 */ 1374 if (dup2(job->outPipe, 1) == -1) { 1375 execError("dup2", "job->outPipe"); 1376 _exit(1); 1377 } 1378 /* 1379 * The output channels are marked close on exec. This bit was 1380 * duplicated by the dup2(on some systems), so we have to clear 1381 * it before routing the shell's error output to the same place as 1382 * its standard output. 1383 */ 1384 (void)fcntl(1, F_SETFD, 0); 1385 if (dup2(1, 2) == -1) { 1386 execError("dup2", "1, 2"); 1387 _exit(1); 1388 } 1389 1390 /* 1391 * We want to switch the child into a different process family so 1392 * we can kill it and all its descendants in one fell swoop, 1393 * by killing its process family, but not commit suicide. 1394 */ 1395 #if defined(HAVE_SETPGID) 1396 (void)setpgid(0, getpid()); 1397 #else 1398 #if defined(HAVE_SETSID) 1399 /* XXX: dsl - I'm sure this should be setpgrp()... */ 1400 (void)setsid(); 1401 #else 1402 (void)setpgrp(0, getpid()); 1403 #endif 1404 #endif 1405 1406 Var_ExportVars(); 1407 1408 (void)execv(shellPath, argv); 1409 execError("exec", shellPath); 1410 _exit(1); 1411 } 1412 1413 /* Parent, continuing after the child exec */ 1414 job->pid = cpid; 1415 1416 Trace_Log(JOBSTART, job); 1417 1418 /* 1419 * Set the current position in the buffer to the beginning 1420 * and mark another stream to watch in the outputs mask 1421 */ 1422 job->curPos = 0; 1423 1424 watchfd(job); 1425 1426 if (job->cmdFILE != NULL && job->cmdFILE != stdout) { 1427 (void)fclose(job->cmdFILE); 1428 job->cmdFILE = NULL; 1429 } 1430 1431 /* 1432 * Now the job is actually running, add it to the table. 1433 */ 1434 if (DEBUG(JOB)) { 1435 fprintf(debug_file, "JobExec(%s): pid %d added to jobs table\n", 1436 job->node->name, job->pid); 1437 job_table_dump("job started"); 1438 } 1439 JobSigUnlock(&mask); 1440 } 1441 1442 /*- 1443 *----------------------------------------------------------------------- 1444 * JobMakeArgv -- 1445 * Create the argv needed to execute the shell for a given job. 1446 * 1447 * 1448 * Results: 1449 * 1450 * Side Effects: 1451 * 1452 *----------------------------------------------------------------------- 1453 */ 1454 static void 1455 JobMakeArgv(Job *job, char **argv) 1456 { 1457 int argc; 1458 static char args[10]; /* For merged arguments */ 1459 1460 argv[0] = UNCONST(shellName); 1461 argc = 1; 1462 1463 if ((commandShell->exit && (*commandShell->exit != '-')) || 1464 (commandShell->echo && (*commandShell->echo != '-'))) 1465 { 1466 /* 1467 * At least one of the flags doesn't have a minus before it, so 1468 * merge them together. Have to do this because the *(&(@*#*&#$# 1469 * Bourne shell thinks its second argument is a file to source. 1470 * Grrrr. Note the ten-character limitation on the combined arguments. 1471 */ 1472 (void)snprintf(args, sizeof(args), "-%s%s", 1473 ((job->flags & JOB_IGNERR) ? "" : 1474 (commandShell->exit ? commandShell->exit : "")), 1475 ((job->flags & JOB_SILENT) ? "" : 1476 (commandShell->echo ? commandShell->echo : ""))); 1477 1478 if (args[1]) { 1479 argv[argc] = args; 1480 argc++; 1481 } 1482 } else { 1483 if (!(job->flags & JOB_IGNERR) && commandShell->exit) { 1484 argv[argc] = UNCONST(commandShell->exit); 1485 argc++; 1486 } 1487 if (!(job->flags & JOB_SILENT) && commandShell->echo) { 1488 argv[argc] = UNCONST(commandShell->echo); 1489 argc++; 1490 } 1491 } 1492 argv[argc] = NULL; 1493 } 1494 1495 /*- 1496 *----------------------------------------------------------------------- 1497 * JobStart -- 1498 * Start a target-creation process going for the target described 1499 * by the graph node gn. 1500 * 1501 * Input: 1502 * gn target to create 1503 * flags flags for the job to override normal ones. 1504 * e.g. JOB_SPECIAL or JOB_IGNDOTS 1505 * previous The previous Job structure for this node, if any. 1506 * 1507 * Results: 1508 * JOB_ERROR if there was an error in the commands, JOB_FINISHED 1509 * if there isn't actually anything left to do for the job and 1510 * JOB_RUNNING if the job has been started. 1511 * 1512 * Side Effects: 1513 * A new Job node is created and added to the list of running 1514 * jobs. PMake is forked and a child shell created. 1515 * 1516 * NB: I'm fairly sure that this code is never called with JOB_SPECIAL set 1517 * JOB_IGNDOTS is never set (dsl) 1518 * Also the return value is ignored by everyone. 1519 *----------------------------------------------------------------------- 1520 */ 1521 static int 1522 JobStart(GNode *gn, int flags) 1523 { 1524 Job *job; /* new job descriptor */ 1525 char *argv[10]; /* Argument vector to shell */ 1526 Boolean cmdsOK; /* true if the nodes commands were all right */ 1527 Boolean noExec; /* Set true if we decide not to run the job */ 1528 int tfd; /* File descriptor to the temp file */ 1529 1530 for (job = job_table; job < job_table_end; job++) { 1531 if (job->job_state == JOB_ST_FREE) 1532 break; 1533 } 1534 if (job >= job_table_end) 1535 Punt("JobStart no job slots vacant"); 1536 1537 memset(job, 0, sizeof *job); 1538 job->job_state = JOB_ST_SETUP; 1539 if (gn->type & OP_SPECIAL) 1540 flags |= JOB_SPECIAL; 1541 1542 job->node = gn; 1543 job->tailCmds = NULL; 1544 1545 /* 1546 * Set the initial value of the flags for this job based on the global 1547 * ones and the node's attributes... Any flags supplied by the caller 1548 * are also added to the field. 1549 */ 1550 job->flags = 0; 1551 if (Targ_Ignore(gn)) { 1552 job->flags |= JOB_IGNERR; 1553 } 1554 if (Targ_Silent(gn)) { 1555 job->flags |= JOB_SILENT; 1556 } 1557 job->flags |= flags; 1558 1559 /* 1560 * Check the commands now so any attributes from .DEFAULT have a chance 1561 * to migrate to the node 1562 */ 1563 cmdsOK = Job_CheckCommands(gn, Error); 1564 1565 job->inPollfd = NULL; 1566 /* 1567 * If the -n flag wasn't given, we open up OUR (not the child's) 1568 * temporary file to stuff commands in it. The thing is rd/wr so we don't 1569 * need to reopen it to feed it to the shell. If the -n flag *was* given, 1570 * we just set the file to be stdout. Cute, huh? 1571 */ 1572 if (((gn->type & OP_MAKE) && !(noRecursiveExecute)) || 1573 (!noExecute && !touchFlag)) { 1574 /* 1575 * tfile is the name of a file into which all shell commands are 1576 * put. It is removed before the child shell is executed, unless 1577 * DEBUG(SCRIPT) is set. 1578 */ 1579 char *tfile; 1580 sigset_t mask; 1581 /* 1582 * We're serious here, but if the commands were bogus, we're 1583 * also dead... 1584 */ 1585 if (!cmdsOK) { 1586 PrintOnError(gn, NULL); /* provide some clue */ 1587 DieHorribly(); 1588 } 1589 1590 JobSigLock(&mask); 1591 tfd = mkTempFile(TMPPAT, &tfile); 1592 if (!DEBUG(SCRIPT)) 1593 (void)eunlink(tfile); 1594 JobSigUnlock(&mask); 1595 1596 job->cmdFILE = fdopen(tfd, "w+"); 1597 if (job->cmdFILE == NULL) { 1598 Punt("Could not fdopen %s", tfile); 1599 } 1600 (void)fcntl(FILENO(job->cmdFILE), F_SETFD, 1); 1601 /* 1602 * Send the commands to the command file, flush all its buffers then 1603 * rewind and remove the thing. 1604 */ 1605 noExec = FALSE; 1606 1607 #ifdef USE_META 1608 if (useMeta) { 1609 meta_job_start(job, gn); 1610 if (Targ_Silent(gn)) { /* might have changed */ 1611 job->flags |= JOB_SILENT; 1612 } 1613 } 1614 #endif 1615 /* 1616 * We can do all the commands at once. hooray for sanity 1617 */ 1618 numCommands = 0; 1619 Lst_ForEach(gn->commands, JobPrintCommand, job); 1620 1621 /* 1622 * If we didn't print out any commands to the shell script, 1623 * there's not much point in executing the shell, is there? 1624 */ 1625 if (numCommands == 0) { 1626 noExec = TRUE; 1627 } 1628 1629 free(tfile); 1630 } else if (NoExecute(gn)) { 1631 /* 1632 * Not executing anything -- just print all the commands to stdout 1633 * in one fell swoop. This will still set up job->tailCmds correctly. 1634 */ 1635 if (lastNode != gn) { 1636 MESSAGE(stdout, gn); 1637 lastNode = gn; 1638 } 1639 job->cmdFILE = stdout; 1640 /* 1641 * Only print the commands if they're ok, but don't die if they're 1642 * not -- just let the user know they're bad and keep going. It 1643 * doesn't do any harm in this case and may do some good. 1644 */ 1645 if (cmdsOK) { 1646 Lst_ForEach(gn->commands, JobPrintCommand, job); 1647 } 1648 /* 1649 * Don't execute the shell, thank you. 1650 */ 1651 noExec = TRUE; 1652 } else { 1653 /* 1654 * Just touch the target and note that no shell should be executed. 1655 * Set cmdFILE to stdout to make life easier. Check the commands, too, 1656 * but don't die if they're no good -- it does no harm to keep working 1657 * up the graph. 1658 */ 1659 job->cmdFILE = stdout; 1660 Job_Touch(gn, job->flags&JOB_SILENT); 1661 noExec = TRUE; 1662 } 1663 /* Just in case it isn't already... */ 1664 (void)fflush(job->cmdFILE); 1665 1666 /* 1667 * If we're not supposed to execute a shell, don't. 1668 */ 1669 if (noExec) { 1670 if (!(job->flags & JOB_SPECIAL)) 1671 Job_TokenReturn(); 1672 /* 1673 * Unlink and close the command file if we opened one 1674 */ 1675 if (job->cmdFILE != stdout) { 1676 if (job->cmdFILE != NULL) { 1677 (void)fclose(job->cmdFILE); 1678 job->cmdFILE = NULL; 1679 } 1680 } 1681 1682 /* 1683 * We only want to work our way up the graph if we aren't here because 1684 * the commands for the job were no good. 1685 */ 1686 if (cmdsOK && aborting == 0) { 1687 if (job->tailCmds != NULL) { 1688 Lst_ForEachFrom(job->node->commands, job->tailCmds, 1689 JobSaveCommand, 1690 job->node); 1691 } 1692 job->node->made = MADE; 1693 Make_Update(job->node); 1694 } 1695 job->job_state = JOB_ST_FREE; 1696 return cmdsOK ? JOB_FINISHED : JOB_ERROR; 1697 } 1698 1699 /* 1700 * Set up the control arguments to the shell. This is based on the flags 1701 * set earlier for this job. 1702 */ 1703 JobMakeArgv(job, argv); 1704 1705 /* Create the pipe by which we'll get the shell's output. */ 1706 JobCreatePipe(job, 3); 1707 1708 JobExec(job, argv); 1709 return(JOB_RUNNING); 1710 } 1711 1712 static char * 1713 JobOutput(Job *job, char *cp, char *endp, int msg) 1714 { 1715 char *ecp; 1716 1717 if (commandShell->noPrint) { 1718 ecp = Str_FindSubstring(cp, commandShell->noPrint); 1719 while (ecp != NULL) { 1720 if (cp != ecp) { 1721 *ecp = '\0'; 1722 if (!beSilent && msg && job->node != lastNode) { 1723 MESSAGE(stdout, job->node); 1724 lastNode = job->node; 1725 } 1726 /* 1727 * The only way there wouldn't be a newline after 1728 * this line is if it were the last in the buffer. 1729 * however, since the non-printable comes after it, 1730 * there must be a newline, so we don't print one. 1731 */ 1732 (void)fprintf(stdout, "%s", cp); 1733 (void)fflush(stdout); 1734 } 1735 cp = ecp + commandShell->noPLen; 1736 if (cp != endp) { 1737 /* 1738 * Still more to print, look again after skipping 1739 * the whitespace following the non-printable 1740 * command.... 1741 */ 1742 cp++; 1743 while (*cp == ' ' || *cp == '\t' || *cp == '\n') { 1744 cp++; 1745 } 1746 ecp = Str_FindSubstring(cp, commandShell->noPrint); 1747 } else { 1748 return cp; 1749 } 1750 } 1751 } 1752 return cp; 1753 } 1754 1755 /*- 1756 *----------------------------------------------------------------------- 1757 * JobDoOutput -- 1758 * This function is called at different times depending on 1759 * whether the user has specified that output is to be collected 1760 * via pipes or temporary files. In the former case, we are called 1761 * whenever there is something to read on the pipe. We collect more 1762 * output from the given job and store it in the job's outBuf. If 1763 * this makes up a line, we print it tagged by the job's identifier, 1764 * as necessary. 1765 * If output has been collected in a temporary file, we open the 1766 * file and read it line by line, transfering it to our own 1767 * output channel until the file is empty. At which point we 1768 * remove the temporary file. 1769 * In both cases, however, we keep our figurative eye out for the 1770 * 'noPrint' line for the shell from which the output came. If 1771 * we recognize a line, we don't print it. If the command is not 1772 * alone on the line (the character after it is not \0 or \n), we 1773 * do print whatever follows it. 1774 * 1775 * Input: 1776 * job the job whose output needs printing 1777 * finish TRUE if this is the last time we'll be called 1778 * for this job 1779 * 1780 * Results: 1781 * None 1782 * 1783 * Side Effects: 1784 * curPos may be shifted as may the contents of outBuf. 1785 *----------------------------------------------------------------------- 1786 */ 1787 STATIC void 1788 JobDoOutput(Job *job, Boolean finish) 1789 { 1790 Boolean gotNL = FALSE; /* true if got a newline */ 1791 Boolean fbuf; /* true if our buffer filled up */ 1792 int nr; /* number of bytes read */ 1793 int i; /* auxiliary index into outBuf */ 1794 int max; /* limit for i (end of current data) */ 1795 int nRead; /* (Temporary) number of bytes read */ 1796 1797 /* 1798 * Read as many bytes as will fit in the buffer. 1799 */ 1800 end_loop: 1801 gotNL = FALSE; 1802 fbuf = FALSE; 1803 1804 nRead = read(job->inPipe, &job->outBuf[job->curPos], 1805 JOB_BUFSIZE - job->curPos); 1806 if (nRead < 0) { 1807 if (errno == EAGAIN) 1808 return; 1809 if (DEBUG(JOB)) { 1810 perror("JobDoOutput(piperead)"); 1811 } 1812 nr = 0; 1813 } else { 1814 nr = nRead; 1815 } 1816 1817 /* 1818 * If we hit the end-of-file (the job is dead), we must flush its 1819 * remaining output, so pretend we read a newline if there's any 1820 * output remaining in the buffer. 1821 * Also clear the 'finish' flag so we stop looping. 1822 */ 1823 if ((nr == 0) && (job->curPos != 0)) { 1824 job->outBuf[job->curPos] = '\n'; 1825 nr = 1; 1826 finish = FALSE; 1827 } else if (nr == 0) { 1828 finish = FALSE; 1829 } 1830 1831 /* 1832 * Look for the last newline in the bytes we just got. If there is 1833 * one, break out of the loop with 'i' as its index and gotNL set 1834 * TRUE. 1835 */ 1836 max = job->curPos + nr; 1837 for (i = job->curPos + nr - 1; i >= job->curPos; i--) { 1838 if (job->outBuf[i] == '\n') { 1839 gotNL = TRUE; 1840 break; 1841 } else if (job->outBuf[i] == '\0') { 1842 /* 1843 * Why? 1844 */ 1845 job->outBuf[i] = ' '; 1846 } 1847 } 1848 1849 if (!gotNL) { 1850 job->curPos += nr; 1851 if (job->curPos == JOB_BUFSIZE) { 1852 /* 1853 * If we've run out of buffer space, we have no choice 1854 * but to print the stuff. sigh. 1855 */ 1856 fbuf = TRUE; 1857 i = job->curPos; 1858 } 1859 } 1860 if (gotNL || fbuf) { 1861 /* 1862 * Need to send the output to the screen. Null terminate it 1863 * first, overwriting the newline character if there was one. 1864 * So long as the line isn't one we should filter (according 1865 * to the shell description), we print the line, preceded 1866 * by a target banner if this target isn't the same as the 1867 * one for which we last printed something. 1868 * The rest of the data in the buffer are then shifted down 1869 * to the start of the buffer and curPos is set accordingly. 1870 */ 1871 job->outBuf[i] = '\0'; 1872 if (i >= job->curPos) { 1873 char *cp; 1874 1875 cp = JobOutput(job, job->outBuf, &job->outBuf[i], FALSE); 1876 1877 /* 1878 * There's still more in that thar buffer. This time, though, 1879 * we know there's no newline at the end, so we add one of 1880 * our own free will. 1881 */ 1882 if (*cp != '\0') { 1883 if (!beSilent && job->node != lastNode) { 1884 MESSAGE(stdout, job->node); 1885 lastNode = job->node; 1886 } 1887 #ifdef USE_META 1888 if (useMeta) { 1889 meta_job_output(job, cp, gotNL ? "\n" : ""); 1890 } 1891 #endif 1892 (void)fprintf(stdout, "%s%s", cp, gotNL ? "\n" : ""); 1893 (void)fflush(stdout); 1894 } 1895 } 1896 if (i < max - 1) { 1897 /* shift the remaining characters down */ 1898 (void)memcpy(job->outBuf, &job->outBuf[i + 1], max - (i + 1)); 1899 job->curPos = max - (i + 1); 1900 1901 } else { 1902 /* 1903 * We have written everything out, so we just start over 1904 * from the start of the buffer. No copying. No nothing. 1905 */ 1906 job->curPos = 0; 1907 } 1908 } 1909 if (finish) { 1910 /* 1911 * If the finish flag is true, we must loop until we hit 1912 * end-of-file on the pipe. This is guaranteed to happen 1913 * eventually since the other end of the pipe is now closed 1914 * (we closed it explicitly and the child has exited). When 1915 * we do get an EOF, finish will be set FALSE and we'll fall 1916 * through and out. 1917 */ 1918 goto end_loop; 1919 } 1920 } 1921 1922 static void 1923 JobRun(GNode *targ) 1924 { 1925 #ifdef notyet 1926 /* 1927 * Unfortunately it is too complicated to run .BEGIN, .END, 1928 * and .INTERRUPT job in the parallel job module. This has 1929 * the nice side effect that it avoids a lot of other problems. 1930 */ 1931 Lst lst = Lst_Init(FALSE); 1932 Lst_AtEnd(lst, targ); 1933 (void)Make_Run(lst); 1934 Lst_Destroy(lst, NULL); 1935 JobStart(targ, JOB_SPECIAL); 1936 while (jobTokensRunning) { 1937 Job_CatchOutput(); 1938 } 1939 #else 1940 Compat_Make(targ, targ); 1941 if (targ->made == ERROR) { 1942 PrintOnError(targ, "\n\nStop."); 1943 exit(1); 1944 } 1945 #endif 1946 } 1947 1948 /*- 1949 *----------------------------------------------------------------------- 1950 * Job_CatchChildren -- 1951 * Handle the exit of a child. Called from Make_Make. 1952 * 1953 * Input: 1954 * block TRUE if should block on the wait 1955 * 1956 * Results: 1957 * none. 1958 * 1959 * Side Effects: 1960 * The job descriptor is removed from the list of children. 1961 * 1962 * Notes: 1963 * We do waits, blocking or not, according to the wisdom of our 1964 * caller, until there are no more children to report. For each 1965 * job, call JobFinish to finish things off. 1966 * 1967 *----------------------------------------------------------------------- 1968 */ 1969 1970 void 1971 Job_CatchChildren(void) 1972 { 1973 int pid; /* pid of dead child */ 1974 WAIT_T status; /* Exit/termination status */ 1975 1976 /* 1977 * Don't even bother if we know there's no one around. 1978 */ 1979 if (jobTokensRunning == 0) 1980 return; 1981 1982 while ((pid = waitpid((pid_t) -1, &status, WNOHANG | WUNTRACED)) > 0) { 1983 if (DEBUG(JOB)) { 1984 (void)fprintf(debug_file, "Process %d exited/stopped status %x.\n", pid, 1985 WAIT_STATUS(status)); 1986 } 1987 JobReapChild(pid, status, TRUE); 1988 } 1989 } 1990 1991 /* 1992 * It is possible that wait[pid]() was called from elsewhere, 1993 * this lets us reap jobs regardless. 1994 */ 1995 void 1996 JobReapChild(pid_t pid, WAIT_T status, Boolean isJobs) 1997 { 1998 Job *job; /* job descriptor for dead child */ 1999 2000 /* 2001 * Don't even bother if we know there's no one around. 2002 */ 2003 if (jobTokensRunning == 0) 2004 return; 2005 2006 job = JobFindPid(pid, JOB_ST_RUNNING, isJobs); 2007 if (job == NULL) { 2008 if (isJobs) { 2009 if (!lurking_children) 2010 Error("Child (%d) status %x not in table?", pid, status); 2011 } 2012 return; /* not ours */ 2013 } 2014 if (WIFSTOPPED(status)) { 2015 if (DEBUG(JOB)) { 2016 (void)fprintf(debug_file, "Process %d (%s) stopped.\n", 2017 job->pid, job->node->name); 2018 } 2019 if (!make_suspended) { 2020 switch (WSTOPSIG(status)) { 2021 case SIGTSTP: 2022 (void)printf("*** [%s] Suspended\n", job->node->name); 2023 break; 2024 case SIGSTOP: 2025 (void)printf("*** [%s] Stopped\n", job->node->name); 2026 break; 2027 default: 2028 (void)printf("*** [%s] Stopped -- signal %d\n", 2029 job->node->name, WSTOPSIG(status)); 2030 } 2031 job->job_suspended = 1; 2032 } 2033 (void)fflush(stdout); 2034 return; 2035 } 2036 2037 job->job_state = JOB_ST_FINISHED; 2038 job->exit_status = WAIT_STATUS(status); 2039 2040 JobFinish(job, status); 2041 } 2042 2043 /*- 2044 *----------------------------------------------------------------------- 2045 * Job_CatchOutput -- 2046 * Catch the output from our children, if we're using 2047 * pipes do so. Otherwise just block time until we get a 2048 * signal(most likely a SIGCHLD) since there's no point in 2049 * just spinning when there's nothing to do and the reaping 2050 * of a child can wait for a while. 2051 * 2052 * Results: 2053 * None 2054 * 2055 * Side Effects: 2056 * Output is read from pipes if we're piping. 2057 * ----------------------------------------------------------------------- 2058 */ 2059 void 2060 Job_CatchOutput(void) 2061 { 2062 int nready; 2063 Job *job; 2064 int i; 2065 2066 (void)fflush(stdout); 2067 2068 /* The first fd in the list is the job token pipe */ 2069 do { 2070 nready = poll(fds + 1 - wantToken, nfds - 1 + wantToken, POLL_MSEC); 2071 } while (nready < 0 && errno == EINTR); 2072 2073 if (nready < 0) 2074 Punt("poll: %s", strerror(errno)); 2075 2076 if (nready > 0 && readyfd(&childExitJob)) { 2077 char token = 0; 2078 ssize_t count; 2079 count = read(childExitJob.inPipe, &token, 1); 2080 switch (count) { 2081 case 0: 2082 Punt("unexpected eof on token pipe"); 2083 case -1: 2084 Punt("token pipe read: %s", strerror(errno)); 2085 case 1: 2086 if (token == DO_JOB_RESUME[0]) 2087 /* Complete relay requested from our SIGCONT handler */ 2088 JobRestartJobs(); 2089 break; 2090 default: 2091 abort(); 2092 } 2093 --nready; 2094 } 2095 2096 Job_CatchChildren(); 2097 if (nready == 0) 2098 return; 2099 2100 for (i = 2; i < nfds; i++) { 2101 if (!fds[i].revents) 2102 continue; 2103 job = jobfds[i]; 2104 if (job->job_state == JOB_ST_RUNNING) 2105 JobDoOutput(job, FALSE); 2106 if (--nready == 0) 2107 return; 2108 } 2109 } 2110 2111 /*- 2112 *----------------------------------------------------------------------- 2113 * Job_Make -- 2114 * Start the creation of a target. Basically a front-end for 2115 * JobStart used by the Make module. 2116 * 2117 * Results: 2118 * None. 2119 * 2120 * Side Effects: 2121 * Another job is started. 2122 * 2123 *----------------------------------------------------------------------- 2124 */ 2125 void 2126 Job_Make(GNode *gn) 2127 { 2128 (void)JobStart(gn, 0); 2129 } 2130 2131 void 2132 Shell_Init(void) 2133 { 2134 if (shellPath == NULL) { 2135 /* 2136 * We are using the default shell, which may be an absolute 2137 * path if DEFSHELL_CUSTOM is defined. 2138 */ 2139 shellName = commandShell->name; 2140 #ifdef DEFSHELL_CUSTOM 2141 if (*shellName == '/') { 2142 shellPath = shellName; 2143 shellName = strrchr(shellPath, '/'); 2144 shellName++; 2145 } else 2146 #endif 2147 shellPath = str_concat(_PATH_DEFSHELLDIR, shellName, STR_ADDSLASH); 2148 } 2149 if (commandShell->exit == NULL) { 2150 commandShell->exit = ""; 2151 } 2152 if (commandShell->echo == NULL) { 2153 commandShell->echo = ""; 2154 } 2155 } 2156 2157 /*- 2158 * Returns the string literal that is used in the current command shell 2159 * to produce a newline character. 2160 */ 2161 const char * 2162 Shell_GetNewline(void) 2163 { 2164 2165 return commandShell->newline; 2166 } 2167 2168 void 2169 Job_SetPrefix(void) 2170 { 2171 2172 if (targPrefix) { 2173 free(targPrefix); 2174 } else if (!Var_Exists(MAKE_JOB_PREFIX, VAR_GLOBAL)) { 2175 Var_Set(MAKE_JOB_PREFIX, "---", VAR_GLOBAL, 0); 2176 } 2177 2178 targPrefix = Var_Subst(NULL, "${" MAKE_JOB_PREFIX "}", VAR_GLOBAL, 0); 2179 } 2180 2181 /*- 2182 *----------------------------------------------------------------------- 2183 * Job_Init -- 2184 * Initialize the process module 2185 * 2186 * Input: 2187 * 2188 * Results: 2189 * none 2190 * 2191 * Side Effects: 2192 * lists and counters are initialized 2193 *----------------------------------------------------------------------- 2194 */ 2195 void 2196 Job_Init(void) 2197 { 2198 /* Allocate space for all the job info */ 2199 job_table = bmake_malloc(maxJobs * sizeof *job_table); 2200 memset(job_table, 0, maxJobs * sizeof *job_table); 2201 job_table_end = job_table + maxJobs; 2202 wantToken = 0; 2203 2204 aborting = 0; 2205 errors = 0; 2206 2207 lastNode = NULL; 2208 2209 /* 2210 * There is a non-zero chance that we already have children. 2211 * eg after 'make -f- <<EOF' 2212 * Since their termination causes a 'Child (pid) not in table' message, 2213 * Collect the status of any that are already dead, and suppress the 2214 * error message if there are any undead ones. 2215 */ 2216 for (;;) { 2217 int rval, status; 2218 rval = waitpid((pid_t) -1, &status, WNOHANG); 2219 if (rval > 0) 2220 continue; 2221 if (rval == 0) 2222 lurking_children = 1; 2223 break; 2224 } 2225 2226 Shell_Init(); 2227 2228 JobCreatePipe(&childExitJob, 3); 2229 2230 /* We can only need to wait for tokens, children and output from each job */ 2231 fds = bmake_malloc(sizeof (*fds) * (2 + maxJobs)); 2232 jobfds = bmake_malloc(sizeof (*jobfds) * (2 + maxJobs)); 2233 2234 /* These are permanent entries and take slots 0 and 1 */ 2235 watchfd(&tokenWaitJob); 2236 watchfd(&childExitJob); 2237 2238 sigemptyset(&caught_signals); 2239 /* 2240 * Install a SIGCHLD handler. 2241 */ 2242 (void)bmake_signal(SIGCHLD, JobChildSig); 2243 sigaddset(&caught_signals, SIGCHLD); 2244 2245 #define ADDSIG(s,h) \ 2246 if (bmake_signal(s, SIG_IGN) != SIG_IGN) { \ 2247 sigaddset(&caught_signals, s); \ 2248 (void)bmake_signal(s, h); \ 2249 } 2250 2251 /* 2252 * Catch the four signals that POSIX specifies if they aren't ignored. 2253 * JobPassSig will take care of calling JobInterrupt if appropriate. 2254 */ 2255 ADDSIG(SIGINT, JobPassSig_int) 2256 ADDSIG(SIGHUP, JobPassSig_term) 2257 ADDSIG(SIGTERM, JobPassSig_term) 2258 ADDSIG(SIGQUIT, JobPassSig_term) 2259 2260 /* 2261 * There are additional signals that need to be caught and passed if 2262 * either the export system wants to be told directly of signals or if 2263 * we're giving each job its own process group (since then it won't get 2264 * signals from the terminal driver as we own the terminal) 2265 */ 2266 ADDSIG(SIGTSTP, JobPassSig_suspend) 2267 ADDSIG(SIGTTOU, JobPassSig_suspend) 2268 ADDSIG(SIGTTIN, JobPassSig_suspend) 2269 ADDSIG(SIGWINCH, JobCondPassSig) 2270 ADDSIG(SIGCONT, JobContinueSig) 2271 #undef ADDSIG 2272 2273 (void)Job_RunTarget(".BEGIN", NULL); 2274 postCommands = Targ_FindNode(".END", TARG_CREATE); 2275 } 2276 2277 static void JobSigReset(void) 2278 { 2279 #define DELSIG(s) \ 2280 if (sigismember(&caught_signals, s)) { \ 2281 (void)bmake_signal(s, SIG_DFL); \ 2282 } 2283 2284 DELSIG(SIGINT) 2285 DELSIG(SIGHUP) 2286 DELSIG(SIGQUIT) 2287 DELSIG(SIGTERM) 2288 DELSIG(SIGTSTP) 2289 DELSIG(SIGTTOU) 2290 DELSIG(SIGTTIN) 2291 DELSIG(SIGWINCH) 2292 DELSIG(SIGCONT) 2293 #undef DELSIG 2294 (void)bmake_signal(SIGCHLD, SIG_DFL); 2295 } 2296 2297 /*- 2298 *----------------------------------------------------------------------- 2299 * JobMatchShell -- 2300 * Find a shell in 'shells' given its name. 2301 * 2302 * Results: 2303 * A pointer to the Shell structure. 2304 * 2305 * Side Effects: 2306 * None. 2307 * 2308 *----------------------------------------------------------------------- 2309 */ 2310 static Shell * 2311 JobMatchShell(const char *name) 2312 { 2313 Shell *sh; 2314 2315 for (sh = shells; sh->name != NULL; sh++) { 2316 if (strcmp(name, sh->name) == 0) 2317 return (sh); 2318 } 2319 return NULL; 2320 } 2321 2322 /*- 2323 *----------------------------------------------------------------------- 2324 * Job_ParseShell -- 2325 * Parse a shell specification and set up commandShell, shellPath 2326 * and shellName appropriately. 2327 * 2328 * Input: 2329 * line The shell spec 2330 * 2331 * Results: 2332 * FAILURE if the specification was incorrect. 2333 * 2334 * Side Effects: 2335 * commandShell points to a Shell structure (either predefined or 2336 * created from the shell spec), shellPath is the full path of the 2337 * shell described by commandShell, while shellName is just the 2338 * final component of shellPath. 2339 * 2340 * Notes: 2341 * A shell specification consists of a .SHELL target, with dependency 2342 * operator, followed by a series of blank-separated words. Double 2343 * quotes can be used to use blanks in words. A backslash escapes 2344 * anything (most notably a double-quote and a space) and 2345 * provides the functionality it does in C. Each word consists of 2346 * keyword and value separated by an equal sign. There should be no 2347 * unnecessary spaces in the word. The keywords are as follows: 2348 * name Name of shell. 2349 * path Location of shell. 2350 * quiet Command to turn off echoing. 2351 * echo Command to turn echoing on 2352 * filter Result of turning off echoing that shouldn't be 2353 * printed. 2354 * echoFlag Flag to turn echoing on at the start 2355 * errFlag Flag to turn error checking on at the start 2356 * hasErrCtl True if shell has error checking control 2357 * newline String literal to represent a newline char 2358 * check Command to turn on error checking if hasErrCtl 2359 * is TRUE or template of command to echo a command 2360 * for which error checking is off if hasErrCtl is 2361 * FALSE. 2362 * ignore Command to turn off error checking if hasErrCtl 2363 * is TRUE or template of command to execute a 2364 * command so as to ignore any errors it returns if 2365 * hasErrCtl is FALSE. 2366 * 2367 *----------------------------------------------------------------------- 2368 */ 2369 ReturnStatus 2370 Job_ParseShell(char *line) 2371 { 2372 char **words; 2373 char **argv; 2374 int argc; 2375 char *path; 2376 Shell newShell; 2377 Boolean fullSpec = FALSE; 2378 Shell *sh; 2379 2380 while (isspace((unsigned char)*line)) { 2381 line++; 2382 } 2383 2384 if (shellArgv) 2385 free(UNCONST(shellArgv)); 2386 2387 memset(&newShell, 0, sizeof(newShell)); 2388 2389 /* 2390 * Parse the specification by keyword 2391 */ 2392 words = brk_string(line, &argc, TRUE, &path); 2393 if (words == NULL) { 2394 Error("Unterminated quoted string [%s]", line); 2395 return FAILURE; 2396 } 2397 shellArgv = path; 2398 2399 for (path = NULL, argv = words; argc != 0; argc--, argv++) { 2400 if (strncmp(*argv, "path=", 5) == 0) { 2401 path = &argv[0][5]; 2402 } else if (strncmp(*argv, "name=", 5) == 0) { 2403 newShell.name = &argv[0][5]; 2404 } else { 2405 if (strncmp(*argv, "quiet=", 6) == 0) { 2406 newShell.echoOff = &argv[0][6]; 2407 } else if (strncmp(*argv, "echo=", 5) == 0) { 2408 newShell.echoOn = &argv[0][5]; 2409 } else if (strncmp(*argv, "filter=", 7) == 0) { 2410 newShell.noPrint = &argv[0][7]; 2411 newShell.noPLen = strlen(newShell.noPrint); 2412 } else if (strncmp(*argv, "echoFlag=", 9) == 0) { 2413 newShell.echo = &argv[0][9]; 2414 } else if (strncmp(*argv, "errFlag=", 8) == 0) { 2415 newShell.exit = &argv[0][8]; 2416 } else if (strncmp(*argv, "hasErrCtl=", 10) == 0) { 2417 char c = argv[0][10]; 2418 newShell.hasErrCtl = !((c != 'Y') && (c != 'y') && 2419 (c != 'T') && (c != 't')); 2420 } else if (strncmp(*argv, "newline=", 8) == 0) { 2421 newShell.newline = &argv[0][8]; 2422 } else if (strncmp(*argv, "check=", 6) == 0) { 2423 newShell.errCheck = &argv[0][6]; 2424 } else if (strncmp(*argv, "ignore=", 7) == 0) { 2425 newShell.ignErr = &argv[0][7]; 2426 } else if (strncmp(*argv, "errout=", 7) == 0) { 2427 newShell.errOut = &argv[0][7]; 2428 } else if (strncmp(*argv, "comment=", 8) == 0) { 2429 newShell.commentChar = argv[0][8]; 2430 } else { 2431 Parse_Error(PARSE_FATAL, "Unknown keyword \"%s\"", 2432 *argv); 2433 free(words); 2434 return(FAILURE); 2435 } 2436 fullSpec = TRUE; 2437 } 2438 } 2439 2440 if (path == NULL) { 2441 /* 2442 * If no path was given, the user wants one of the pre-defined shells, 2443 * yes? So we find the one s/he wants with the help of JobMatchShell 2444 * and set things up the right way. shellPath will be set up by 2445 * Shell_Init. 2446 */ 2447 if (newShell.name == NULL) { 2448 Parse_Error(PARSE_FATAL, "Neither path nor name specified"); 2449 free(words); 2450 return(FAILURE); 2451 } else { 2452 if ((sh = JobMatchShell(newShell.name)) == NULL) { 2453 Parse_Error(PARSE_WARNING, "%s: No matching shell", 2454 newShell.name); 2455 free(words); 2456 return(FAILURE); 2457 } 2458 commandShell = sh; 2459 shellName = newShell.name; 2460 if (shellPath) { 2461 /* Shell_Init has already been called! Do it again. */ 2462 free(UNCONST(shellPath)); 2463 shellPath = NULL; 2464 Shell_Init(); 2465 } 2466 } 2467 } else { 2468 /* 2469 * The user provided a path. If s/he gave nothing else (fullSpec is 2470 * FALSE), try and find a matching shell in the ones we know of. 2471 * Else we just take the specification at its word and copy it 2472 * to a new location. In either case, we need to record the 2473 * path the user gave for the shell. 2474 */ 2475 shellPath = path; 2476 path = strrchr(path, '/'); 2477 if (path == NULL) { 2478 path = UNCONST(shellPath); 2479 } else { 2480 path += 1; 2481 } 2482 if (newShell.name != NULL) { 2483 shellName = newShell.name; 2484 } else { 2485 shellName = path; 2486 } 2487 if (!fullSpec) { 2488 if ((sh = JobMatchShell(shellName)) == NULL) { 2489 Parse_Error(PARSE_WARNING, "%s: No matching shell", 2490 shellName); 2491 free(words); 2492 return(FAILURE); 2493 } 2494 commandShell = sh; 2495 } else { 2496 commandShell = bmake_malloc(sizeof(Shell)); 2497 *commandShell = newShell; 2498 } 2499 } 2500 2501 if (commandShell->echoOn && commandShell->echoOff) { 2502 commandShell->hasEchoCtl = TRUE; 2503 } 2504 2505 if (!commandShell->hasErrCtl) { 2506 if (commandShell->errCheck == NULL) { 2507 commandShell->errCheck = ""; 2508 } 2509 if (commandShell->ignErr == NULL) { 2510 commandShell->ignErr = "%s\n"; 2511 } 2512 } 2513 2514 /* 2515 * Do not free up the words themselves, since they might be in use by the 2516 * shell specification. 2517 */ 2518 free(words); 2519 return SUCCESS; 2520 } 2521 2522 /*- 2523 *----------------------------------------------------------------------- 2524 * JobInterrupt -- 2525 * Handle the receipt of an interrupt. 2526 * 2527 * Input: 2528 * runINTERRUPT Non-zero if commands for the .INTERRUPT target 2529 * should be executed 2530 * signo signal received 2531 * 2532 * Results: 2533 * None 2534 * 2535 * Side Effects: 2536 * All children are killed. Another job will be started if the 2537 * .INTERRUPT target was given. 2538 *----------------------------------------------------------------------- 2539 */ 2540 static void 2541 JobInterrupt(int runINTERRUPT, int signo) 2542 { 2543 Job *job; /* job descriptor in that element */ 2544 GNode *interrupt; /* the node describing the .INTERRUPT target */ 2545 sigset_t mask; 2546 GNode *gn; 2547 2548 aborting = ABORT_INTERRUPT; 2549 2550 JobSigLock(&mask); 2551 2552 for (job = job_table; job < job_table_end; job++) { 2553 if (job->job_state != JOB_ST_RUNNING) 2554 continue; 2555 2556 gn = job->node; 2557 2558 if ((gn->type & (OP_JOIN|OP_PHONY)) == 0 && !Targ_Precious(gn)) { 2559 char *file = (gn->path == NULL ? gn->name : gn->path); 2560 if (!noExecute && eunlink(file) != -1) { 2561 Error("*** %s removed", file); 2562 } 2563 } 2564 if (job->pid) { 2565 if (DEBUG(JOB)) { 2566 (void)fprintf(debug_file, 2567 "JobInterrupt passing signal %d to child %d.\n", 2568 signo, job->pid); 2569 } 2570 KILLPG(job->pid, signo); 2571 } 2572 } 2573 2574 JobSigUnlock(&mask); 2575 2576 if (runINTERRUPT && !touchFlag) { 2577 interrupt = Targ_FindNode(".INTERRUPT", TARG_NOCREATE); 2578 if (interrupt != NULL) { 2579 ignoreErrors = FALSE; 2580 JobRun(interrupt); 2581 } 2582 } 2583 Trace_Log(MAKEINTR, 0); 2584 exit(signo); 2585 } 2586 2587 /* 2588 *----------------------------------------------------------------------- 2589 * Job_Finish -- 2590 * Do final processing such as the running of the commands 2591 * attached to the .END target. 2592 * 2593 * Results: 2594 * Number of errors reported. 2595 * 2596 * Side Effects: 2597 * None. 2598 *----------------------------------------------------------------------- 2599 */ 2600 int 2601 Job_Finish(void) 2602 { 2603 if (postCommands != NULL && 2604 (!Lst_IsEmpty(postCommands->commands) || 2605 !Lst_IsEmpty(postCommands->children))) { 2606 if (errors) { 2607 Error("Errors reported so .END ignored"); 2608 } else { 2609 JobRun(postCommands); 2610 } 2611 } 2612 return(errors); 2613 } 2614 2615 /*- 2616 *----------------------------------------------------------------------- 2617 * Job_End -- 2618 * Cleanup any memory used by the jobs module 2619 * 2620 * Results: 2621 * None. 2622 * 2623 * Side Effects: 2624 * Memory is freed 2625 *----------------------------------------------------------------------- 2626 */ 2627 void 2628 Job_End(void) 2629 { 2630 #ifdef CLEANUP 2631 if (shellArgv) 2632 free(shellArgv); 2633 #endif 2634 } 2635 2636 /*- 2637 *----------------------------------------------------------------------- 2638 * Job_Wait -- 2639 * Waits for all running jobs to finish and returns. Sets 'aborting' 2640 * to ABORT_WAIT to prevent other jobs from starting. 2641 * 2642 * Results: 2643 * None. 2644 * 2645 * Side Effects: 2646 * Currently running jobs finish. 2647 * 2648 *----------------------------------------------------------------------- 2649 */ 2650 void 2651 Job_Wait(void) 2652 { 2653 aborting = ABORT_WAIT; 2654 while (jobTokensRunning != 0) { 2655 Job_CatchOutput(); 2656 } 2657 aborting = 0; 2658 } 2659 2660 /*- 2661 *----------------------------------------------------------------------- 2662 * Job_AbortAll -- 2663 * Abort all currently running jobs without handling output or anything. 2664 * This function is to be called only in the event of a major 2665 * error. Most definitely NOT to be called from JobInterrupt. 2666 * 2667 * Results: 2668 * None 2669 * 2670 * Side Effects: 2671 * All children are killed, not just the firstborn 2672 *----------------------------------------------------------------------- 2673 */ 2674 void 2675 Job_AbortAll(void) 2676 { 2677 Job *job; /* the job descriptor in that element */ 2678 WAIT_T foo; 2679 2680 aborting = ABORT_ERROR; 2681 2682 if (jobTokensRunning) { 2683 for (job = job_table; job < job_table_end; job++) { 2684 if (job->job_state != JOB_ST_RUNNING) 2685 continue; 2686 /* 2687 * kill the child process with increasingly drastic signals to make 2688 * darn sure it's dead. 2689 */ 2690 KILLPG(job->pid, SIGINT); 2691 KILLPG(job->pid, SIGKILL); 2692 } 2693 } 2694 2695 /* 2696 * Catch as many children as want to report in at first, then give up 2697 */ 2698 while (waitpid((pid_t) -1, &foo, WNOHANG) > 0) 2699 continue; 2700 } 2701 2702 2703 /*- 2704 *----------------------------------------------------------------------- 2705 * JobRestartJobs -- 2706 * Tries to restart stopped jobs if there are slots available. 2707 * Called in process context in response to a SIGCONT. 2708 * 2709 * Results: 2710 * None. 2711 * 2712 * Side Effects: 2713 * Resumes jobs. 2714 * 2715 *----------------------------------------------------------------------- 2716 */ 2717 static void 2718 JobRestartJobs(void) 2719 { 2720 Job *job; 2721 2722 for (job = job_table; job < job_table_end; job++) { 2723 if (job->job_state == JOB_ST_RUNNING && 2724 (make_suspended || job->job_suspended)) { 2725 if (DEBUG(JOB)) { 2726 (void)fprintf(debug_file, "Restarting stopped job pid %d.\n", 2727 job->pid); 2728 } 2729 if (job->job_suspended) { 2730 (void)printf("*** [%s] Continued\n", job->node->name); 2731 (void)fflush(stdout); 2732 } 2733 job->job_suspended = 0; 2734 if (KILLPG(job->pid, SIGCONT) != 0 && DEBUG(JOB)) { 2735 fprintf(debug_file, "Failed to send SIGCONT to %d\n", job->pid); 2736 } 2737 } 2738 if (job->job_state == JOB_ST_FINISHED) 2739 /* Job exit deferred after calling waitpid() in a signal handler */ 2740 JobFinish(job, job->exit_status); 2741 } 2742 make_suspended = 0; 2743 } 2744 2745 static void 2746 watchfd(Job *job) 2747 { 2748 if (job->inPollfd != NULL) 2749 Punt("Watching watched job"); 2750 2751 fds[nfds].fd = job->inPipe; 2752 fds[nfds].events = POLLIN; 2753 jobfds[nfds] = job; 2754 job->inPollfd = &fds[nfds]; 2755 nfds++; 2756 } 2757 2758 static void 2759 clearfd(Job *job) 2760 { 2761 int i; 2762 if (job->inPollfd == NULL) 2763 Punt("Unwatching unwatched job"); 2764 i = job->inPollfd - fds; 2765 nfds--; 2766 /* 2767 * Move last job in table into hole made by dead job. 2768 */ 2769 if (nfds != i) { 2770 fds[i] = fds[nfds]; 2771 jobfds[i] = jobfds[nfds]; 2772 jobfds[i]->inPollfd = &fds[i]; 2773 } 2774 job->inPollfd = NULL; 2775 } 2776 2777 static int 2778 readyfd(Job *job) 2779 { 2780 if (job->inPollfd == NULL) 2781 Punt("Polling unwatched job"); 2782 return (job->inPollfd->revents & POLLIN) != 0; 2783 } 2784 2785 /*- 2786 *----------------------------------------------------------------------- 2787 * JobTokenAdd -- 2788 * Put a token into the job pipe so that some make process can start 2789 * another job. 2790 * 2791 * Side Effects: 2792 * Allows more build jobs to be spawned somewhere. 2793 * 2794 *----------------------------------------------------------------------- 2795 */ 2796 2797 static void 2798 JobTokenAdd(void) 2799 { 2800 char tok = JOB_TOKENS[aborting], tok1; 2801 2802 /* If we are depositing an error token flush everything else */ 2803 while (tok != '+' && read(tokenWaitJob.inPipe, &tok1, 1) == 1) 2804 continue; 2805 2806 if (DEBUG(JOB)) 2807 fprintf(debug_file, "(%d) aborting %d, deposit token %c\n", 2808 getpid(), aborting, JOB_TOKENS[aborting]); 2809 while (write(tokenWaitJob.outPipe, &tok, 1) == -1 && errno == EAGAIN) 2810 continue; 2811 } 2812 2813 /*- 2814 *----------------------------------------------------------------------- 2815 * Job_ServerStartTokenAdd -- 2816 * Prep the job token pipe in the root make process. 2817 * 2818 *----------------------------------------------------------------------- 2819 */ 2820 2821 void 2822 Job_ServerStart(int max_tokens, int jp_0, int jp_1) 2823 { 2824 int i; 2825 char jobarg[64]; 2826 2827 if (jp_0 >= 0 && jp_1 >= 0) { 2828 /* Pipe passed in from parent */ 2829 tokenWaitJob.inPipe = jp_0; 2830 tokenWaitJob.outPipe = jp_1; 2831 (void)fcntl(jp_0, F_SETFD, 1); 2832 (void)fcntl(jp_1, F_SETFD, 1); 2833 return; 2834 } 2835 2836 JobCreatePipe(&tokenWaitJob, 15); 2837 2838 snprintf(jobarg, sizeof(jobarg), "%d,%d", 2839 tokenWaitJob.inPipe, tokenWaitJob.outPipe); 2840 2841 Var_Append(MAKEFLAGS, "-J", VAR_GLOBAL); 2842 Var_Append(MAKEFLAGS, jobarg, VAR_GLOBAL); 2843 2844 /* 2845 * Preload the job pipe with one token per job, save the one 2846 * "extra" token for the primary job. 2847 * 2848 * XXX should clip maxJobs against PIPE_BUF -- if max_tokens is 2849 * larger than the write buffer size of the pipe, we will 2850 * deadlock here. 2851 */ 2852 for (i = 1; i < max_tokens; i++) 2853 JobTokenAdd(); 2854 } 2855 2856 /*- 2857 *----------------------------------------------------------------------- 2858 * Job_TokenReturn -- 2859 * Return a withdrawn token to the pool. 2860 * 2861 *----------------------------------------------------------------------- 2862 */ 2863 2864 void 2865 Job_TokenReturn(void) 2866 { 2867 jobTokensRunning--; 2868 if (jobTokensRunning < 0) 2869 Punt("token botch"); 2870 if (jobTokensRunning || JOB_TOKENS[aborting] != '+') 2871 JobTokenAdd(); 2872 } 2873 2874 /*- 2875 *----------------------------------------------------------------------- 2876 * Job_TokenWithdraw -- 2877 * Attempt to withdraw a token from the pool. 2878 * 2879 * Results: 2880 * Returns TRUE if a token was withdrawn, and FALSE if the pool 2881 * is currently empty. 2882 * 2883 * Side Effects: 2884 * If pool is empty, set wantToken so that we wake up 2885 * when a token is released. 2886 * 2887 *----------------------------------------------------------------------- 2888 */ 2889 2890 2891 Boolean 2892 Job_TokenWithdraw(void) 2893 { 2894 char tok, tok1; 2895 int count; 2896 2897 wantToken = 0; 2898 if (DEBUG(JOB)) 2899 fprintf(debug_file, "Job_TokenWithdraw(%d): aborting %d, running %d\n", 2900 getpid(), aborting, jobTokensRunning); 2901 2902 if (aborting || (jobTokensRunning >= maxJobs)) 2903 return FALSE; 2904 2905 count = read(tokenWaitJob.inPipe, &tok, 1); 2906 if (count == 0) 2907 Fatal("eof on job pipe!"); 2908 if (count < 0 && jobTokensRunning != 0) { 2909 if (errno != EAGAIN) { 2910 Fatal("job pipe read: %s", strerror(errno)); 2911 } 2912 if (DEBUG(JOB)) 2913 fprintf(debug_file, "(%d) blocked for token\n", getpid()); 2914 wantToken = 1; 2915 return FALSE; 2916 } 2917 2918 if (count == 1 && tok != '+') { 2919 /* make being abvorted - remove any other job tokens */ 2920 if (DEBUG(JOB)) 2921 fprintf(debug_file, "(%d) aborted by token %c\n", getpid(), tok); 2922 while (read(tokenWaitJob.inPipe, &tok1, 1) == 1) 2923 continue; 2924 /* And put the stopper back */ 2925 while (write(tokenWaitJob.outPipe, &tok, 1) == -1 && errno == EAGAIN) 2926 continue; 2927 Fatal("A failure has been detected in another branch of the parallel make"); 2928 } 2929 2930 if (count == 1 && jobTokensRunning == 0) 2931 /* We didn't want the token really */ 2932 while (write(tokenWaitJob.outPipe, &tok, 1) == -1 && errno == EAGAIN) 2933 continue; 2934 2935 jobTokensRunning++; 2936 if (DEBUG(JOB)) 2937 fprintf(debug_file, "(%d) withdrew token\n", getpid()); 2938 return TRUE; 2939 } 2940 2941 /*- 2942 *----------------------------------------------------------------------- 2943 * Job_RunTarget -- 2944 * Run the named target if found. If a filename is specified, then 2945 * set that to the sources. 2946 * 2947 * Results: 2948 * None 2949 * 2950 * Side Effects: 2951 * exits if the target fails. 2952 * 2953 *----------------------------------------------------------------------- 2954 */ 2955 Boolean 2956 Job_RunTarget(const char *target, const char *fname) { 2957 GNode *gn = Targ_FindNode(target, TARG_NOCREATE); 2958 2959 if (gn == NULL) 2960 return FALSE; 2961 2962 if (fname) 2963 Var_Set(ALLSRC, fname, gn, 0); 2964 2965 JobRun(gn); 2966 if (gn->made == ERROR) { 2967 PrintOnError(gn, "\n\nStop."); 2968 exit(1); 2969 } 2970 return TRUE; 2971 } 2972 2973 #ifdef USE_SELECT 2974 int 2975 emul_poll(struct pollfd *fd, int nfd, int timeout) 2976 { 2977 fd_set rfds, wfds; 2978 int i, maxfd, nselect, npoll; 2979 struct timeval tv, *tvp; 2980 long usecs; 2981 2982 FD_ZERO(&rfds); 2983 FD_ZERO(&wfds); 2984 2985 maxfd = -1; 2986 for (i = 0; i < nfd; i++) { 2987 fd[i].revents = 0; 2988 2989 if (fd[i].events & POLLIN) 2990 FD_SET(fd[i].fd, &rfds); 2991 2992 if (fd[i].events & POLLOUT) 2993 FD_SET(fd[i].fd, &wfds); 2994 2995 if (fd[i].fd > maxfd) 2996 maxfd = fd[i].fd; 2997 } 2998 2999 if (maxfd >= FD_SETSIZE) { 3000 Punt("Ran out of fd_set slots; " 3001 "recompile with a larger FD_SETSIZE."); 3002 } 3003 3004 if (timeout < 0) { 3005 tvp = NULL; 3006 } else { 3007 usecs = timeout * 1000; 3008 tv.tv_sec = usecs / 1000000; 3009 tv.tv_usec = usecs % 1000000; 3010 tvp = &tv; 3011 } 3012 3013 nselect = select(maxfd + 1, &rfds, &wfds, 0, tvp); 3014 3015 if (nselect <= 0) 3016 return nselect; 3017 3018 npoll = 0; 3019 for (i = 0; i < nfd; i++) { 3020 if (FD_ISSET(fd[i].fd, &rfds)) 3021 fd[i].revents |= POLLIN; 3022 3023 if (FD_ISSET(fd[i].fd, &wfds)) 3024 fd[i].revents |= POLLOUT; 3025 3026 if (fd[i].revents) 3027 npoll++; 3028 } 3029 3030 return npoll; 3031 } 3032 #endif /* USE_SELECT */ 3033