1 /* $NetBSD: job.c,v 1.154 2010/08/07 21:28:40 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 1.154 2010/08/07 21:28:40 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 1.154 2010/08/07 21:28:40 sjg Exp $"); 81 #endif 82 #endif /* not lint */ 83 #endif 84 85 /*- 86 * job.c -- 87 * handle the creation etc. of our child processes. 88 * 89 * Interface: 90 * Job_Make Start the creation of the given target. 91 * 92 * Job_CatchChildren Check for and handle the termination of any 93 * children. This must be called reasonably 94 * frequently to keep the whole make going at 95 * a decent clip, since job table entries aren't 96 * removed until their process is caught this way. 97 * 98 * Job_CatchOutput Print any output our children have produced. 99 * Should also be called fairly frequently to 100 * keep the user informed of what's going on. 101 * If no output is waiting, it will block for 102 * a time given by the SEL_* constants, below, 103 * or until output is ready. 104 * 105 * Job_Init Called to intialize this module. in addition, 106 * any commands attached to the .BEGIN target 107 * are executed before this function returns. 108 * Hence, the makefile must have been parsed 109 * before this function is called. 110 * 111 * Job_End Cleanup any memory used. 112 * 113 * Job_ParseShell Given the line following a .SHELL target, parse 114 * the line as a shell specification. Returns 115 * FAILURE if the spec was incorrect. 116 * 117 * Job_Finish Perform any final processing which needs doing. 118 * This includes the execution of any commands 119 * which have been/were attached to the .END 120 * target. It should only be called when the 121 * job table is empty. 122 * 123 * Job_AbortAll Abort all currently running jobs. It doesn't 124 * handle output or do anything for the jobs, 125 * just kills them. It should only be called in 126 * an emergency, as it were. 127 * 128 * Job_CheckCommands Verify that the commands for a target are 129 * ok. Provide them if necessary and possible. 130 * 131 * Job_Touch Update a target without really updating it. 132 * 133 * Job_Wait Wait for all currently-running jobs to finish. 134 */ 135 136 #include <sys/types.h> 137 #include <sys/stat.h> 138 #include <sys/file.h> 139 #include <sys/time.h> 140 #include <sys/wait.h> 141 142 #include <errno.h> 143 #include <fcntl.h> 144 #ifndef USE_SELECT 145 #include <poll.h> 146 #endif 147 #include <signal.h> 148 #include <stdio.h> 149 #include <string.h> 150 #include <utime.h> 151 152 #include "make.h" 153 #include "hash.h" 154 #include "dir.h" 155 #include "job.h" 156 #include "pathnames.h" 157 #include "trace.h" 158 # define STATIC static 159 160 /* 161 * error handling variables 162 */ 163 static int errors = 0; /* number of errors reported */ 164 static int aborting = 0; /* why is the make aborting? */ 165 #define ABORT_ERROR 1 /* Because of an error */ 166 #define ABORT_INTERRUPT 2 /* Because it was interrupted */ 167 #define ABORT_WAIT 3 /* Waiting for jobs to finish */ 168 #define JOB_TOKENS "+EI+" /* Token to requeue for each abort state */ 169 170 /* 171 * this tracks the number of tokens currently "out" to build jobs. 172 */ 173 int jobTokensRunning = 0; 174 int not_parallel = 0; /* set if .NOT_PARALLEL */ 175 176 /* 177 * XXX: Avoid SunOS bug... FILENO() is fp->_file, and file 178 * is a char! So when we go above 127 we turn negative! 179 */ 180 #define FILENO(a) ((unsigned) fileno(a)) 181 182 /* 183 * post-make command processing. The node postCommands is really just the 184 * .END target but we keep it around to avoid having to search for it 185 * all the time. 186 */ 187 static GNode *postCommands = NULL; 188 /* node containing commands to execute when 189 * everything else is done */ 190 static int numCommands; /* The number of commands actually printed 191 * for a target. Should this number be 192 * 0, no shell will be executed. */ 193 194 /* 195 * Return values from JobStart. 196 */ 197 #define JOB_RUNNING 0 /* Job is running */ 198 #define JOB_ERROR 1 /* Error in starting the job */ 199 #define JOB_FINISHED 2 /* The job is already finished */ 200 201 /* 202 * Descriptions for various shells. 203 * 204 * The build environment may set DEFSHELL_INDEX to one of 205 * DEFSHELL_INDEX_SH, DEFSHELL_INDEX_KSH, or DEFSHELL_INDEX_CSH, to 206 * select one of the prefedined shells as the default shell. 207 * 208 * Alternatively, the build environment may set DEFSHELL_CUSTOM to the 209 * name or the full path of a sh-compatible shell, which will be used as 210 * the default shell. 211 * 212 * ".SHELL" lines in Makefiles can choose the default shell from the 213 # set defined here, or add additional shells. 214 */ 215 216 #ifdef DEFSHELL_CUSTOM 217 #define DEFSHELL_INDEX_CUSTOM 0 218 #define DEFSHELL_INDEX_SH 1 219 #define DEFSHELL_INDEX_KSH 2 220 #define DEFSHELL_INDEX_CSH 3 221 #else /* !DEFSHELL_CUSTOM */ 222 #define DEFSHELL_INDEX_SH 0 223 #define DEFSHELL_INDEX_KSH 1 224 #define DEFSHELL_INDEX_CSH 2 225 #endif /* !DEFSHELL_CUSTOM */ 226 227 #ifndef DEFSHELL_INDEX 228 #define DEFSHELL_INDEX 0 /* DEFSHELL_INDEX_CUSTOM or DEFSHELL_INDEX_SH */ 229 #endif /* !DEFSHELL_INDEX */ 230 231 static Shell shells[] = { 232 #ifdef DEFSHELL_CUSTOM 233 /* 234 * An sh-compatible shell with a non-standard name. 235 * 236 * Keep this in sync with the "sh" description below, but avoid 237 * non-portable features that might not be supplied by all 238 * sh-compatible shells. 239 */ 240 { 241 DEFSHELL_CUSTOM, 242 FALSE, "", "", "", 0, 243 FALSE, "echo \"%s\"\n", "%s\n", "{ %s \n} || exit $?\n", "'\n'", '#', 244 "", 245 "", 246 }, 247 #endif /* DEFSHELL_CUSTOM */ 248 /* 249 * SH description. Echo control is also possible and, under 250 * sun UNIX anyway, one can even control error checking. 251 */ 252 { 253 "sh", 254 FALSE, "", "", "", 0, 255 FALSE, "echo \"%s\"\n", "%s\n", "{ %s \n} || exit $?\n", "'\n'", '#', 256 #if defined(MAKE_NATIVE) && defined(__NetBSD__) 257 "q", 258 #else 259 "", 260 #endif 261 "", 262 }, 263 /* 264 * KSH description. 265 */ 266 { 267 "ksh", 268 TRUE, "set +v", "set -v", "set +v", 6, 269 FALSE, "echo \"%s\"\n", "%s\n", "{ %s \n} || exit $?\n", "'\n'", '#', 270 "v", 271 "", 272 }, 273 /* 274 * CSH description. The csh can do echo control by playing 275 * with the setting of the 'echo' shell variable. Sadly, 276 * however, it is unable to do error control nicely. 277 */ 278 { 279 "csh", 280 TRUE, "unset verbose", "set verbose", "unset verbose", 10, 281 FALSE, "echo \"%s\"\n", "csh -c \"%s || exit 0\"\n", "", "'\\\n'", '#', 282 "v", "e", 283 }, 284 /* 285 * UNKNOWN. 286 */ 287 { 288 NULL, 289 FALSE, NULL, NULL, NULL, 0, 290 FALSE, NULL, NULL, NULL, NULL, 0, 291 NULL, NULL, 292 } 293 }; 294 static Shell *commandShell = &shells[DEFSHELL_INDEX]; /* this is the shell to 295 * which we pass all 296 * commands in the Makefile. 297 * It is set by the 298 * Job_ParseShell function */ 299 const char *shellPath = NULL, /* full pathname of 300 * executable image */ 301 *shellName = NULL; /* last component of shell */ 302 static const char *shellArgv = NULL; /* Custom shell args */ 303 304 305 STATIC Job *job_table; /* The structures that describe them */ 306 STATIC Job *job_table_end; /* job_table + maxJobs */ 307 static int wantToken; /* we want a token */ 308 static int lurking_children = 0; 309 static int make_suspended = 0; /* non-zero if we've seen a SIGTSTP (etc) */ 310 311 /* 312 * Set of descriptors of pipes connected to 313 * the output channels of children 314 */ 315 static struct pollfd *fds = NULL; 316 static Job **jobfds = NULL; 317 static int nfds = 0; 318 static void watchfd(Job *); 319 static void clearfd(Job *); 320 static int readyfd(Job *); 321 322 STATIC GNode *lastNode; /* The node for which output was most recently 323 * produced. */ 324 STATIC const char *targFmt; /* Format string to use to head output from a 325 * job when it's not the most-recent job heard 326 * from */ 327 static char *targPrefix = NULL; /* What we print at the start of targFmt */ 328 static Job tokenWaitJob; /* token wait pseudo-job */ 329 330 static Job childExitJob; /* child exit pseudo-job */ 331 #define CHILD_EXIT "." 332 #define DO_JOB_RESUME "R" 333 334 #define TARG_FMT "%s %s ---\n" /* Default format */ 335 #define MESSAGE(fp, gn) \ 336 (void)fprintf(fp, targFmt, targPrefix, gn->name) 337 338 static sigset_t caught_signals; /* Set of signals we handle */ 339 #if defined(SYSV) 340 #define KILLPG(pid, sig) kill(-(pid), (sig)) 341 #else 342 #define KILLPG(pid, sig) killpg((pid), (sig)) 343 #endif 344 345 static void JobChildSig(int); 346 static void JobContinueSig(int); 347 static Job *JobFindPid(int, int, Boolean); 348 static int JobPrintCommand(void *, void *); 349 static int JobSaveCommand(void *, void *); 350 static void JobClose(Job *); 351 static void JobExec(Job *, char **); 352 static void JobMakeArgv(Job *, char **); 353 static int JobStart(GNode *, int); 354 static char *JobOutput(Job *, char *, char *, int); 355 static void JobDoOutput(Job *, Boolean); 356 static Shell *JobMatchShell(const char *); 357 static void JobInterrupt(int, int); 358 static void JobRestartJobs(void); 359 static void JobTokenAdd(void); 360 static void JobSigLock(sigset_t *); 361 static void JobSigUnlock(sigset_t *); 362 static void JobSigReset(void); 363 364 const char *malloc_options="A"; 365 366 static void 367 job_table_dump(const char *where) 368 { 369 Job *job; 370 371 fprintf(debug_file, "job table @ %s\n", where); 372 for (job = job_table; job < job_table_end; job++) { 373 fprintf(debug_file, "job %d, status %d, flags %d, pid %d\n", 374 (int)(job - job_table), job->job_state, job->flags, job->pid); 375 } 376 } 377 378 /* 379 * JobSigLock/JobSigUnlock 380 * 381 * Signal lock routines to get exclusive access. Currently used to 382 * protect `jobs' and `stoppedJobs' list manipulations. 383 */ 384 static void JobSigLock(sigset_t *omaskp) 385 { 386 if (sigprocmask(SIG_BLOCK, &caught_signals, omaskp) != 0) { 387 Punt("JobSigLock: sigprocmask: %s", strerror(errno)); 388 sigemptyset(omaskp); 389 } 390 } 391 392 static void JobSigUnlock(sigset_t *omaskp) 393 { 394 (void)sigprocmask(SIG_SETMASK, omaskp, NULL); 395 } 396 397 static void 398 JobCreatePipe(Job *job, int minfd) 399 { 400 int i, fd; 401 402 if (pipe(job->jobPipe) == -1) 403 Punt("Cannot create pipe: %s", strerror(errno)); 404 405 /* Set close-on-exec flag for both */ 406 (void)fcntl(job->jobPipe[0], F_SETFD, 1); 407 (void)fcntl(job->jobPipe[1], F_SETFD, 1); 408 409 /* 410 * We mark the input side of the pipe non-blocking; we poll(2) the 411 * pipe when we're waiting for a job token, but we might lose the 412 * race for the token when a new one becomes available, so the read 413 * from the pipe should not block. 414 */ 415 fcntl(job->jobPipe[0], F_SETFL, 416 fcntl(job->jobPipe[0], F_GETFL, 0) | O_NONBLOCK); 417 418 for (i = 0; i < 2; i++) { 419 /* Avoid using low numbered fds */ 420 fd = fcntl(job->jobPipe[i], F_DUPFD, minfd); 421 if (fd != -1) { 422 close(job->jobPipe[i]); 423 job->jobPipe[i] = fd; 424 } 425 } 426 } 427 428 /*- 429 *----------------------------------------------------------------------- 430 * JobCondPassSig -- 431 * Pass a signal to a job 432 * 433 * Input: 434 * signop Signal to send it 435 * 436 * Side Effects: 437 * None, except the job may bite it. 438 * 439 *----------------------------------------------------------------------- 440 */ 441 static void 442 JobCondPassSig(int signo) 443 { 444 Job *job; 445 446 if (DEBUG(JOB)) { 447 (void)fprintf(debug_file, "JobCondPassSig(%d) called.\n", signo); 448 } 449 450 for (job = job_table; job < job_table_end; job++) { 451 if (job->job_state != JOB_ST_RUNNING) 452 continue; 453 if (DEBUG(JOB)) { 454 (void)fprintf(debug_file, 455 "JobCondPassSig passing signal %d to child %d.\n", 456 signo, job->pid); 457 } 458 KILLPG(job->pid, signo); 459 } 460 } 461 462 /*- 463 *----------------------------------------------------------------------- 464 * JobChldSig -- 465 * SIGCHLD handler. 466 * 467 * Input: 468 * signo The signal number we've received 469 * 470 * Results: 471 * None. 472 * 473 * Side Effects: 474 * Sends a token on the child exit pipe to wake us up from 475 * select()/poll(). 476 * 477 *----------------------------------------------------------------------- 478 */ 479 static void 480 JobChildSig(int signo __unused) 481 { 482 write(childExitJob.outPipe, CHILD_EXIT, 1); 483 } 484 485 486 /*- 487 *----------------------------------------------------------------------- 488 * JobContinueSig -- 489 * Resume all stopped jobs. 490 * 491 * Input: 492 * signo The signal number we've received 493 * 494 * Results: 495 * None. 496 * 497 * Side Effects: 498 * Jobs start running again. 499 * 500 *----------------------------------------------------------------------- 501 */ 502 static void 503 JobContinueSig(int signo __unused) 504 { 505 /* 506 * Defer sending to SIGCONT to our stopped children until we return 507 * from the signal handler. 508 */ 509 write(childExitJob.outPipe, DO_JOB_RESUME, 1); 510 } 511 512 /*- 513 *----------------------------------------------------------------------- 514 * JobPassSig -- 515 * Pass a signal on to all jobs, then resend to ourselves. 516 * 517 * Input: 518 * signo The signal number we've received 519 * 520 * Results: 521 * None. 522 * 523 * Side Effects: 524 * We die by the same signal. 525 * 526 *----------------------------------------------------------------------- 527 */ 528 static void 529 JobPassSig_int(int signo) 530 { 531 /* Run .INTERRUPT target then exit */ 532 JobInterrupt(TRUE, signo); 533 } 534 535 static void 536 JobPassSig_term(int signo) 537 { 538 /* Dont run .INTERRUPT target then exit */ 539 JobInterrupt(FALSE, signo); 540 } 541 542 static void 543 JobPassSig_suspend(int signo) 544 { 545 sigset_t nmask, omask; 546 struct sigaction act; 547 548 /* Suppress job started/continued messages */ 549 make_suspended = 1; 550 551 /* Pass the signal onto every job */ 552 JobCondPassSig(signo); 553 554 /* 555 * Send ourselves the signal now we've given the message to everyone else. 556 * Note we block everything else possible while we're getting the signal. 557 * This ensures that all our jobs get continued when we wake up before 558 * we take any other signal. 559 */ 560 sigfillset(&nmask); 561 sigdelset(&nmask, signo); 562 (void)sigprocmask(SIG_SETMASK, &nmask, &omask); 563 564 act.sa_handler = SIG_DFL; 565 sigemptyset(&act.sa_mask); 566 act.sa_flags = 0; 567 (void)sigaction(signo, &act, NULL); 568 569 if (DEBUG(JOB)) { 570 (void)fprintf(debug_file, 571 "JobPassSig passing signal %d to self.\n", signo); 572 } 573 574 (void)kill(getpid(), signo); 575 576 /* 577 * We've been continued. 578 * 579 * A whole host of signals continue to happen! 580 * SIGCHLD for any processes that actually suspended themselves. 581 * SIGCHLD for any processes that exited while we were alseep. 582 * The SIGCONT that actually caused us to wakeup. 583 * 584 * Since we defer passing the SIGCONT on to our children until 585 * the main processing loop, we can be sure that all the SIGCHLD 586 * events will have happened by then - and that the waitpid() will 587 * collect the child 'suspended' events. 588 * For correct sequencing we just need to ensure we process the 589 * waitpid() before passign on the SIGCONT. 590 * 591 * In any case nothing else is needed here. 592 */ 593 594 /* Restore handler and signal mask */ 595 act.sa_handler = JobPassSig_suspend; 596 (void)sigaction(signo, &act, NULL); 597 (void)sigprocmask(SIG_SETMASK, &omask, NULL); 598 } 599 600 /*- 601 *----------------------------------------------------------------------- 602 * JobFindPid -- 603 * Compare the pid of the job with the given pid and return 0 if they 604 * are equal. This function is called from Job_CatchChildren 605 * to find the job descriptor of the finished job. 606 * 607 * Input: 608 * job job to examine 609 * pid process id desired 610 * 611 * Results: 612 * Job with matching pid 613 * 614 * Side Effects: 615 * None 616 *----------------------------------------------------------------------- 617 */ 618 static Job * 619 JobFindPid(int pid, int status, Boolean isJobs) 620 { 621 Job *job; 622 623 for (job = job_table; job < job_table_end; job++) { 624 if ((job->job_state == status) && job->pid == pid) 625 return job; 626 } 627 if (DEBUG(JOB) && isJobs) 628 job_table_dump("no pid"); 629 return NULL; 630 } 631 632 /*- 633 *----------------------------------------------------------------------- 634 * JobPrintCommand -- 635 * Put out another command for the given job. If the command starts 636 * with an @ or a - we process it specially. In the former case, 637 * so long as the -s and -n flags weren't given to make, we stick 638 * a shell-specific echoOff command in the script. In the latter, 639 * we ignore errors for the entire job, unless the shell has error 640 * control. 641 * If the command is just "..." we take all future commands for this 642 * job to be commands to be executed once the entire graph has been 643 * made and return non-zero to signal that the end of the commands 644 * was reached. These commands are later attached to the postCommands 645 * node and executed by Job_End when all things are done. 646 * This function is called from JobStart via Lst_ForEach. 647 * 648 * Input: 649 * cmdp command string to print 650 * jobp job for which to print it 651 * 652 * Results: 653 * Always 0, unless the command was "..." 654 * 655 * Side Effects: 656 * If the command begins with a '-' and the shell has no error control, 657 * the JOB_IGNERR flag is set in the job descriptor. 658 * If the command is "..." and we're not ignoring such things, 659 * tailCmds is set to the successor node of the cmd. 660 * numCommands is incremented if the command is actually printed. 661 *----------------------------------------------------------------------- 662 */ 663 static int 664 JobPrintCommand(void *cmdp, void *jobp) 665 { 666 Boolean noSpecials; /* true if we shouldn't worry about 667 * inserting special commands into 668 * the input stream. */ 669 Boolean shutUp = FALSE; /* true if we put a no echo command 670 * into the command file */ 671 Boolean errOff = FALSE; /* true if we turned error checking 672 * off before printing the command 673 * and need to turn it back on */ 674 const char *cmdTemplate; /* Template to use when printing the 675 * command */ 676 char *cmdStart; /* Start of expanded command */ 677 char *escCmd = NULL; /* Command with quotes/backticks escaped */ 678 char *cmd = (char *)cmdp; 679 Job *job = (Job *)jobp; 680 char *cp, *tmp; 681 int i, j; 682 683 noSpecials = NoExecute(job->node); 684 685 if (strcmp(cmd, "...") == 0) { 686 job->node->type |= OP_SAVE_CMDS; 687 if ((job->flags & JOB_IGNDOTS) == 0) { 688 job->tailCmds = Lst_Succ(Lst_Member(job->node->commands, 689 cmd)); 690 return 1; 691 } 692 return 0; 693 } 694 695 #define DBPRINTF(fmt, arg) if (DEBUG(JOB)) { \ 696 (void)fprintf(debug_file, fmt, arg); \ 697 } \ 698 (void)fprintf(job->cmdFILE, fmt, arg); \ 699 (void)fflush(job->cmdFILE); 700 701 numCommands += 1; 702 703 cmdStart = cmd = Var_Subst(NULL, cmd, job->node, FALSE); 704 705 cmdTemplate = "%s\n"; 706 707 /* 708 * Check for leading @' and -'s to control echoing and error checking. 709 */ 710 while (*cmd == '@' || *cmd == '-' || (*cmd == '+')) { 711 switch (*cmd) { 712 case '@': 713 shutUp = DEBUG(LOUD) ? FALSE : TRUE; 714 break; 715 case '-': 716 job->flags |= JOB_IGNERR; 717 errOff = TRUE; 718 break; 719 case '+': 720 if (noSpecials) { 721 /* 722 * We're not actually executing anything... 723 * but this one needs to be - use compat mode just for it. 724 */ 725 CompatRunCommand(cmdp, job->node); 726 return 0; 727 } 728 break; 729 } 730 cmd++; 731 } 732 733 while (isspace((unsigned char) *cmd)) 734 cmd++; 735 736 /* 737 * If the shell doesn't have error control the alternate echo'ing will 738 * be done (to avoid showing additional error checking code) 739 * and this will need the characters '$ ` \ "' escaped 740 */ 741 742 if (!commandShell->hasErrCtl) { 743 /* Worst that could happen is every char needs escaping. */ 744 escCmd = bmake_malloc((strlen(cmd) * 2) + 1); 745 for (i = 0, j= 0; cmd[i] != '\0'; i++, j++) { 746 if (cmd[i] == '$' || cmd[i] == '`' || cmd[i] == '\\' || 747 cmd[i] == '"') 748 escCmd[j++] = '\\'; 749 escCmd[j] = cmd[i]; 750 } 751 escCmd[j] = 0; 752 } 753 754 if (shutUp) { 755 if (!(job->flags & JOB_SILENT) && !noSpecials && 756 commandShell->hasEchoCtl) { 757 DBPRINTF("%s\n", commandShell->echoOff); 758 } else { 759 if (commandShell->hasErrCtl) 760 shutUp = FALSE; 761 } 762 } 763 764 if (errOff) { 765 if (!noSpecials) { 766 if (commandShell->hasErrCtl) { 767 /* 768 * we don't want the error-control commands showing 769 * up either, so we turn off echoing while executing 770 * them. We could put another field in the shell 771 * structure to tell JobDoOutput to look for this 772 * string too, but why make it any more complex than 773 * it already is? 774 */ 775 if (!(job->flags & JOB_SILENT) && !shutUp && 776 commandShell->hasEchoCtl) { 777 DBPRINTF("%s\n", commandShell->echoOff); 778 DBPRINTF("%s\n", commandShell->ignErr); 779 DBPRINTF("%s\n", commandShell->echoOn); 780 } else { 781 DBPRINTF("%s\n", commandShell->ignErr); 782 } 783 } else if (commandShell->ignErr && 784 (*commandShell->ignErr != '\0')) 785 { 786 /* 787 * The shell has no error control, so we need to be 788 * weird to get it to ignore any errors from the command. 789 * If echoing is turned on, we turn it off and use the 790 * errCheck template to echo the command. Leave echoing 791 * off so the user doesn't see the weirdness we go through 792 * to ignore errors. Set cmdTemplate to use the weirdness 793 * instead of the simple "%s\n" template. 794 */ 795 if (!(job->flags & JOB_SILENT) && !shutUp) { 796 if (commandShell->hasEchoCtl) { 797 DBPRINTF("%s\n", commandShell->echoOff); 798 } 799 DBPRINTF(commandShell->errCheck, escCmd); 800 shutUp = TRUE; 801 } else { 802 if (!shutUp) { 803 DBPRINTF(commandShell->errCheck, escCmd); 804 } 805 } 806 cmdTemplate = commandShell->ignErr; 807 /* 808 * The error ignoration (hee hee) is already taken care 809 * of by the ignErr template, so pretend error checking 810 * is still on. 811 */ 812 errOff = FALSE; 813 } else { 814 errOff = FALSE; 815 } 816 } else { 817 errOff = FALSE; 818 } 819 } else { 820 821 /* 822 * If errors are being checked and the shell doesn't have error control 823 * but does supply an errOut template, then setup commands to run 824 * through it. 825 */ 826 827 if (!commandShell->hasErrCtl && commandShell->errOut && 828 (*commandShell->errOut != '\0')) { 829 if (!(job->flags & JOB_SILENT) && !shutUp) { 830 if (commandShell->hasEchoCtl) { 831 DBPRINTF("%s\n", commandShell->echoOff); 832 } 833 DBPRINTF(commandShell->errCheck, escCmd); 834 shutUp = TRUE; 835 } 836 /* If it's a comment line or blank, treat as an ignored error */ 837 if ((escCmd[0] == commandShell->commentChar) || 838 (escCmd[0] == 0)) 839 cmdTemplate = commandShell->ignErr; 840 else 841 cmdTemplate = commandShell->errOut; 842 errOff = FALSE; 843 } 844 } 845 846 if (DEBUG(SHELL) && strcmp(shellName, "sh") == 0 && 847 (job->flags & JOB_TRACED) == 0) { 848 DBPRINTF("set -%s\n", "x"); 849 job->flags |= JOB_TRACED; 850 } 851 852 if ((cp = Check_Cwd_Cmd(cmd)) != NULL) { 853 DBPRINTF("test -d %s && ", cp); 854 DBPRINTF("cd %s\n", cp); 855 } 856 857 DBPRINTF(cmdTemplate, cmd); 858 free(cmdStart); 859 if (escCmd) 860 free(escCmd); 861 if (errOff) { 862 /* 863 * If echoing is already off, there's no point in issuing the 864 * echoOff command. Otherwise we issue it and pretend it was on 865 * for the whole command... 866 */ 867 if (!shutUp && !(job->flags & JOB_SILENT) && commandShell->hasEchoCtl){ 868 DBPRINTF("%s\n", commandShell->echoOff); 869 shutUp = TRUE; 870 } 871 DBPRINTF("%s\n", commandShell->errCheck); 872 } 873 if (shutUp && commandShell->hasEchoCtl) { 874 DBPRINTF("%s\n", commandShell->echoOn); 875 } 876 if (cp != NULL) { 877 DBPRINTF("test -d %s && ", cp); 878 DBPRINTF("cd %s\n", Var_Value(".OBJDIR", VAR_GLOBAL, &tmp)); 879 } 880 return 0; 881 } 882 883 /*- 884 *----------------------------------------------------------------------- 885 * JobSaveCommand -- 886 * Save a command to be executed when everything else is done. 887 * Callback function for JobFinish... 888 * 889 * Results: 890 * Always returns 0 891 * 892 * Side Effects: 893 * The command is tacked onto the end of postCommands's commands list. 894 * 895 *----------------------------------------------------------------------- 896 */ 897 static int 898 JobSaveCommand(void *cmd, void *gn) 899 { 900 cmd = Var_Subst(NULL, (char *)cmd, (GNode *)gn, FALSE); 901 (void)Lst_AtEnd(postCommands->commands, cmd); 902 return(0); 903 } 904 905 906 /*- 907 *----------------------------------------------------------------------- 908 * JobClose -- 909 * Called to close both input and output pipes when a job is finished. 910 * 911 * Results: 912 * Nada 913 * 914 * Side Effects: 915 * The file descriptors associated with the job are closed. 916 * 917 *----------------------------------------------------------------------- 918 */ 919 static void 920 JobClose(Job *job) 921 { 922 clearfd(job); 923 (void)close(job->outPipe); 924 job->outPipe = -1; 925 926 JobDoOutput(job, TRUE); 927 (void)close(job->inPipe); 928 job->inPipe = -1; 929 } 930 931 /*- 932 *----------------------------------------------------------------------- 933 * JobFinish -- 934 * Do final processing for the given job including updating 935 * parents and starting new jobs as available/necessary. Note 936 * that we pay no attention to the JOB_IGNERR flag here. 937 * This is because when we're called because of a noexecute flag 938 * or something, jstat.w_status is 0 and when called from 939 * Job_CatchChildren, the status is zeroed if it s/b ignored. 940 * 941 * Input: 942 * job job to finish 943 * status sub-why job went away 944 * 945 * Results: 946 * None 947 * 948 * Side Effects: 949 * Final commands for the job are placed on postCommands. 950 * 951 * If we got an error and are aborting (aborting == ABORT_ERROR) and 952 * the job list is now empty, we are done for the day. 953 * If we recognized an error (errors !=0), we set the aborting flag 954 * to ABORT_ERROR so no more jobs will be started. 955 *----------------------------------------------------------------------- 956 */ 957 /*ARGSUSED*/ 958 static void 959 JobFinish(Job *job, int status) 960 { 961 Boolean done, return_job_token; 962 963 if (DEBUG(JOB)) { 964 fprintf(debug_file, "Jobfinish: %d [%s], status %d\n", 965 job->pid, job->node->name, status); 966 } 967 968 if ((WIFEXITED(status) && 969 (((WEXITSTATUS(status) != 0) && !(job->flags & JOB_IGNERR)))) || 970 WIFSIGNALED(status)) 971 { 972 /* 973 * If it exited non-zero and either we're doing things our 974 * way or we're not ignoring errors, the job is finished. 975 * Similarly, if the shell died because of a signal 976 * the job is also finished. In these 977 * cases, finish out the job's output before printing the exit 978 * status... 979 */ 980 JobClose(job); 981 if (job->cmdFILE != NULL && job->cmdFILE != stdout) { 982 (void)fclose(job->cmdFILE); 983 job->cmdFILE = NULL; 984 } 985 done = TRUE; 986 } else if (WIFEXITED(status)) { 987 /* 988 * Deal with ignored errors in -B mode. We need to print a message 989 * telling of the ignored error as well as setting status.w_status 990 * to 0 so the next command gets run. To do this, we set done to be 991 * TRUE if in -B mode and the job exited non-zero. 992 */ 993 done = WEXITSTATUS(status) != 0; 994 /* 995 * Old comment said: "Note we don't 996 * want to close down any of the streams until we know we're at the 997 * end." 998 * But we do. Otherwise when are we going to print the rest of the 999 * stuff? 1000 */ 1001 JobClose(job); 1002 } else { 1003 /* 1004 * No need to close things down or anything. 1005 */ 1006 done = FALSE; 1007 } 1008 1009 if (done) { 1010 if (WIFEXITED(status)) { 1011 if (DEBUG(JOB)) { 1012 (void)fprintf(debug_file, "Process %d [%s] exited.\n", 1013 job->pid, job->node->name); 1014 } 1015 if (WEXITSTATUS(status) != 0) { 1016 if (job->node != lastNode) { 1017 MESSAGE(stdout, job->node); 1018 lastNode = job->node; 1019 } 1020 (void)printf("*** [%s] Error code %d%s\n", 1021 job->node->name, 1022 WEXITSTATUS(status), 1023 (job->flags & JOB_IGNERR) ? " (ignored)" : ""); 1024 if (job->flags & JOB_IGNERR) { 1025 status = 0; 1026 } else { 1027 PrintOnError(job->node, NULL); 1028 } 1029 } else if (DEBUG(JOB)) { 1030 if (job->node != lastNode) { 1031 MESSAGE(stdout, job->node); 1032 lastNode = job->node; 1033 } 1034 (void)printf("*** [%s] Completed successfully\n", 1035 job->node->name); 1036 } 1037 } else { 1038 if (job->node != lastNode) { 1039 MESSAGE(stdout, job->node); 1040 lastNode = job->node; 1041 } 1042 (void)printf("*** [%s] Signal %d\n", 1043 job->node->name, WTERMSIG(status)); 1044 } 1045 (void)fflush(stdout); 1046 } 1047 1048 return_job_token = FALSE; 1049 1050 Trace_Log(JOBEND, job); 1051 if (!(job->flags & JOB_SPECIAL)) { 1052 if ((status != 0) || 1053 (aborting == ABORT_ERROR) || 1054 (aborting == ABORT_INTERRUPT)) 1055 return_job_token = TRUE; 1056 } 1057 1058 if ((aborting != ABORT_ERROR) && (aborting != ABORT_INTERRUPT) && (status == 0)) { 1059 /* 1060 * As long as we aren't aborting and the job didn't return a non-zero 1061 * status that we shouldn't ignore, we call Make_Update to update 1062 * the parents. In addition, any saved commands for the node are placed 1063 * on the .END target. 1064 */ 1065 if (job->tailCmds != NULL) { 1066 Lst_ForEachFrom(job->node->commands, job->tailCmds, 1067 JobSaveCommand, 1068 job->node); 1069 } 1070 job->node->made = MADE; 1071 if (!(job->flags & JOB_SPECIAL)) 1072 return_job_token = TRUE; 1073 Make_Update(job->node); 1074 job->job_state = JOB_ST_FREE; 1075 } else if (status != 0) { 1076 errors += 1; 1077 job->job_state = JOB_ST_FREE; 1078 } 1079 1080 /* 1081 * Set aborting if any error. 1082 */ 1083 if (errors && !keepgoing && (aborting != ABORT_INTERRUPT)) { 1084 /* 1085 * If we found any errors in this batch of children and the -k flag 1086 * wasn't given, we set the aborting flag so no more jobs get 1087 * started. 1088 */ 1089 aborting = ABORT_ERROR; 1090 } 1091 1092 if (return_job_token) 1093 Job_TokenReturn(); 1094 1095 if (aborting == ABORT_ERROR && jobTokensRunning == 0) { 1096 /* 1097 * If we are aborting and the job table is now empty, we finish. 1098 */ 1099 Finish(errors); 1100 } 1101 } 1102 1103 /*- 1104 *----------------------------------------------------------------------- 1105 * Job_Touch -- 1106 * Touch the given target. Called by JobStart when the -t flag was 1107 * given 1108 * 1109 * Input: 1110 * gn the node of the file to touch 1111 * silent TRUE if should not print message 1112 * 1113 * Results: 1114 * None 1115 * 1116 * Side Effects: 1117 * The data modification of the file is changed. In addition, if the 1118 * file did not exist, it is created. 1119 *----------------------------------------------------------------------- 1120 */ 1121 void 1122 Job_Touch(GNode *gn, Boolean silent) 1123 { 1124 int streamID; /* ID of stream opened to do the touch */ 1125 struct utimbuf times; /* Times for utime() call */ 1126 1127 if (gn->type & (OP_JOIN|OP_USE|OP_USEBEFORE|OP_EXEC|OP_OPTIONAL|OP_PHONY)) { 1128 /* 1129 * .JOIN, .USE, .ZEROTIME and .OPTIONAL targets are "virtual" targets 1130 * and, as such, shouldn't really be created. 1131 */ 1132 return; 1133 } 1134 1135 if (!silent || NoExecute(gn)) { 1136 (void)fprintf(stdout, "touch %s\n", gn->name); 1137 (void)fflush(stdout); 1138 } 1139 1140 if (NoExecute(gn)) { 1141 return; 1142 } 1143 1144 if (gn->type & OP_ARCHV) { 1145 Arch_Touch(gn); 1146 } else if (gn->type & OP_LIB) { 1147 Arch_TouchLib(gn); 1148 } else { 1149 char *file = gn->path ? gn->path : gn->name; 1150 1151 times.actime = times.modtime = now; 1152 if (utime(file, ×) < 0){ 1153 streamID = open(file, O_RDWR | O_CREAT, 0666); 1154 1155 if (streamID >= 0) { 1156 char c; 1157 1158 /* 1159 * Read and write a byte to the file to change the 1160 * modification time, then close the file. 1161 */ 1162 if (read(streamID, &c, 1) == 1) { 1163 (void)lseek(streamID, (off_t)0, SEEK_SET); 1164 (void)write(streamID, &c, 1); 1165 } 1166 1167 (void)close(streamID); 1168 } else { 1169 (void)fprintf(stdout, "*** couldn't touch %s: %s", 1170 file, strerror(errno)); 1171 (void)fflush(stdout); 1172 } 1173 } 1174 } 1175 } 1176 1177 /*- 1178 *----------------------------------------------------------------------- 1179 * Job_CheckCommands -- 1180 * Make sure the given node has all the commands it needs. 1181 * 1182 * Input: 1183 * gn The target whose commands need verifying 1184 * abortProc Function to abort with message 1185 * 1186 * Results: 1187 * TRUE if the commands list is/was ok. 1188 * 1189 * Side Effects: 1190 * The node will have commands from the .DEFAULT rule added to it 1191 * if it needs them. 1192 *----------------------------------------------------------------------- 1193 */ 1194 Boolean 1195 Job_CheckCommands(GNode *gn, void (*abortProc)(const char *, ...)) 1196 { 1197 if (OP_NOP(gn->type) && Lst_IsEmpty(gn->commands) && 1198 ((gn->type & OP_LIB) == 0 || Lst_IsEmpty(gn->children))) { 1199 /* 1200 * No commands. Look for .DEFAULT rule from which we might infer 1201 * commands 1202 */ 1203 if ((DEFAULT != NULL) && !Lst_IsEmpty(DEFAULT->commands) && 1204 (gn->type & OP_SPECIAL) == 0) { 1205 char *p1; 1206 /* 1207 * Make only looks for a .DEFAULT if the node was never the 1208 * target of an operator, so that's what we do too. If 1209 * a .DEFAULT was given, we substitute its commands for gn's 1210 * commands and set the IMPSRC variable to be the target's name 1211 * The DEFAULT node acts like a transformation rule, in that 1212 * gn also inherits any attributes or sources attached to 1213 * .DEFAULT itself. 1214 */ 1215 Make_HandleUse(DEFAULT, gn); 1216 Var_Set(IMPSRC, Var_Value(TARGET, gn, &p1), gn, 0); 1217 if (p1) 1218 free(p1); 1219 } else if (Dir_MTime(gn) == 0 && (gn->type & OP_SPECIAL) == 0) { 1220 /* 1221 * The node wasn't the target of an operator we have no .DEFAULT 1222 * rule to go on and the target doesn't already exist. There's 1223 * nothing more we can do for this branch. If the -k flag wasn't 1224 * given, we stop in our tracks, otherwise we just don't update 1225 * this node's parents so they never get examined. 1226 */ 1227 static const char msg[] = ": don't know how to make"; 1228 1229 if (gn->flags & FROM_DEPEND) { 1230 fprintf(stdout, "%s: ignoring stale %s for %s\n", 1231 progname, makeDependfile, gn->name); 1232 return TRUE; 1233 } 1234 1235 if (gn->type & OP_OPTIONAL) { 1236 (void)fprintf(stdout, "%s%s %s (ignored)\n", progname, 1237 msg, gn->name); 1238 (void)fflush(stdout); 1239 } else if (keepgoing) { 1240 (void)fprintf(stdout, "%s%s %s (continuing)\n", progname, 1241 msg, gn->name); 1242 (void)fflush(stdout); 1243 return FALSE; 1244 } else { 1245 (*abortProc)("%s%s %s. Stop", progname, msg, gn->name); 1246 return FALSE; 1247 } 1248 } 1249 } 1250 return TRUE; 1251 } 1252 1253 /*- 1254 *----------------------------------------------------------------------- 1255 * JobExec -- 1256 * Execute the shell for the given job. Called from JobStart 1257 * 1258 * Input: 1259 * job Job to execute 1260 * 1261 * Results: 1262 * None. 1263 * 1264 * Side Effects: 1265 * A shell is executed, outputs is altered and the Job structure added 1266 * to the job table. 1267 * 1268 *----------------------------------------------------------------------- 1269 */ 1270 static void 1271 JobExec(Job *job, char **argv) 1272 { 1273 int cpid; /* ID of new child */ 1274 sigset_t mask; 1275 1276 job->flags &= ~JOB_TRACED; 1277 1278 if (DEBUG(JOB)) { 1279 int i; 1280 1281 (void)fprintf(debug_file, "Running %s %sly\n", job->node->name, "local"); 1282 (void)fprintf(debug_file, "\tCommand: "); 1283 for (i = 0; argv[i] != NULL; i++) { 1284 (void)fprintf(debug_file, "%s ", argv[i]); 1285 } 1286 (void)fprintf(debug_file, "\n"); 1287 } 1288 1289 /* 1290 * Some jobs produce no output and it's disconcerting to have 1291 * no feedback of their running (since they produce no output, the 1292 * banner with their name in it never appears). This is an attempt to 1293 * provide that feedback, even if nothing follows it. 1294 */ 1295 if ((lastNode != job->node) && !(job->flags & JOB_SILENT)) { 1296 MESSAGE(stdout, job->node); 1297 lastNode = job->node; 1298 } 1299 1300 /* No interruptions until this job is on the `jobs' list */ 1301 JobSigLock(&mask); 1302 1303 /* Pre-emptively mark job running, pid still zero though */ 1304 job->job_state = JOB_ST_RUNNING; 1305 1306 cpid = vFork(); 1307 if (cpid == -1) 1308 Punt("Cannot vfork: %s", strerror(errno)); 1309 1310 if (cpid == 0) { 1311 /* Child */ 1312 sigset_t tmask; 1313 1314 /* 1315 * Reset all signal handlers; this is necessary because we also 1316 * need to unblock signals before we exec(2). 1317 */ 1318 JobSigReset(); 1319 1320 /* Now unblock signals */ 1321 sigemptyset(&tmask); 1322 JobSigUnlock(&tmask); 1323 1324 /* 1325 * Must duplicate the input stream down to the child's input and 1326 * reset it to the beginning (again). Since the stream was marked 1327 * close-on-exec, we must clear that bit in the new input. 1328 */ 1329 if (dup2(FILENO(job->cmdFILE), 0) == -1) { 1330 execError("dup2", "job->cmdFILE"); 1331 _exit(1); 1332 } 1333 (void)fcntl(0, F_SETFD, 0); 1334 (void)lseek(0, (off_t)0, SEEK_SET); 1335 1336 if (job->node->type & OP_MAKE) { 1337 /* 1338 * Pass job token pipe to submakes. 1339 */ 1340 fcntl(tokenWaitJob.inPipe, F_SETFD, 0); 1341 fcntl(tokenWaitJob.outPipe, F_SETFD, 0); 1342 } 1343 1344 /* 1345 * Set up the child's output to be routed through the pipe 1346 * we've created for it. 1347 */ 1348 if (dup2(job->outPipe, 1) == -1) { 1349 execError("dup2", "job->outPipe"); 1350 _exit(1); 1351 } 1352 /* 1353 * The output channels are marked close on exec. This bit was 1354 * duplicated by the dup2(on some systems), so we have to clear 1355 * it before routing the shell's error output to the same place as 1356 * its standard output. 1357 */ 1358 (void)fcntl(1, F_SETFD, 0); 1359 if (dup2(1, 2) == -1) { 1360 execError("dup2", "1, 2"); 1361 _exit(1); 1362 } 1363 1364 /* 1365 * We want to switch the child into a different process family so 1366 * we can kill it and all its descendants in one fell swoop, 1367 * by killing its process family, but not commit suicide. 1368 */ 1369 #if defined(SYSV) 1370 /* XXX: dsl - I'm sure this should be setpgrp()... */ 1371 (void)setsid(); 1372 #else 1373 (void)setpgid(0, getpid()); 1374 #endif 1375 1376 Var_ExportVars(); 1377 1378 (void)execv(shellPath, argv); 1379 execError("exec", shellPath); 1380 _exit(1); 1381 } 1382 1383 /* Parent, continuing after the child exec */ 1384 job->pid = cpid; 1385 1386 Trace_Log(JOBSTART, job); 1387 1388 /* 1389 * Set the current position in the buffer to the beginning 1390 * and mark another stream to watch in the outputs mask 1391 */ 1392 job->curPos = 0; 1393 1394 watchfd(job); 1395 1396 if (job->cmdFILE != NULL && job->cmdFILE != stdout) { 1397 (void)fclose(job->cmdFILE); 1398 job->cmdFILE = NULL; 1399 } 1400 1401 /* 1402 * Now the job is actually running, add it to the table. 1403 */ 1404 if (DEBUG(JOB)) { 1405 fprintf(debug_file, "JobExec(%s): pid %d added to jobs table\n", 1406 job->node->name, job->pid); 1407 job_table_dump("job started"); 1408 } 1409 JobSigUnlock(&mask); 1410 } 1411 1412 /*- 1413 *----------------------------------------------------------------------- 1414 * JobMakeArgv -- 1415 * Create the argv needed to execute the shell for a given job. 1416 * 1417 * 1418 * Results: 1419 * 1420 * Side Effects: 1421 * 1422 *----------------------------------------------------------------------- 1423 */ 1424 static void 1425 JobMakeArgv(Job *job, char **argv) 1426 { 1427 int argc; 1428 static char args[10]; /* For merged arguments */ 1429 1430 argv[0] = UNCONST(shellName); 1431 argc = 1; 1432 1433 if ((commandShell->exit && (*commandShell->exit != '-')) || 1434 (commandShell->echo && (*commandShell->echo != '-'))) 1435 { 1436 /* 1437 * At least one of the flags doesn't have a minus before it, so 1438 * merge them together. Have to do this because the *(&(@*#*&#$# 1439 * Bourne shell thinks its second argument is a file to source. 1440 * Grrrr. Note the ten-character limitation on the combined arguments. 1441 */ 1442 (void)snprintf(args, sizeof(args), "-%s%s", 1443 ((job->flags & JOB_IGNERR) ? "" : 1444 (commandShell->exit ? commandShell->exit : "")), 1445 ((job->flags & JOB_SILENT) ? "" : 1446 (commandShell->echo ? commandShell->echo : ""))); 1447 1448 if (args[1]) { 1449 argv[argc] = args; 1450 argc++; 1451 } 1452 } else { 1453 if (!(job->flags & JOB_IGNERR) && commandShell->exit) { 1454 argv[argc] = UNCONST(commandShell->exit); 1455 argc++; 1456 } 1457 if (!(job->flags & JOB_SILENT) && commandShell->echo) { 1458 argv[argc] = UNCONST(commandShell->echo); 1459 argc++; 1460 } 1461 } 1462 argv[argc] = NULL; 1463 } 1464 1465 /*- 1466 *----------------------------------------------------------------------- 1467 * JobStart -- 1468 * Start a target-creation process going for the target described 1469 * by the graph node gn. 1470 * 1471 * Input: 1472 * gn target to create 1473 * flags flags for the job to override normal ones. 1474 * e.g. JOB_SPECIAL or JOB_IGNDOTS 1475 * previous The previous Job structure for this node, if any. 1476 * 1477 * Results: 1478 * JOB_ERROR if there was an error in the commands, JOB_FINISHED 1479 * if there isn't actually anything left to do for the job and 1480 * JOB_RUNNING if the job has been started. 1481 * 1482 * Side Effects: 1483 * A new Job node is created and added to the list of running 1484 * jobs. PMake is forked and a child shell created. 1485 * 1486 * NB: I'm fairly sure that this code is never called with JOB_SPECIAL set 1487 * JOB_IGNDOTS is never set (dsl) 1488 * Also the return value is ignored by everyone. 1489 *----------------------------------------------------------------------- 1490 */ 1491 static int 1492 JobStart(GNode *gn, int flags) 1493 { 1494 Job *job; /* new job descriptor */ 1495 char *argv[10]; /* Argument vector to shell */ 1496 Boolean cmdsOK; /* true if the nodes commands were all right */ 1497 Boolean noExec; /* Set true if we decide not to run the job */ 1498 int tfd; /* File descriptor to the temp file */ 1499 1500 for (job = job_table; job < job_table_end; job++) { 1501 if (job->job_state == JOB_ST_FREE) 1502 break; 1503 } 1504 if (job >= job_table_end) 1505 Punt("JobStart no job slots vacant"); 1506 1507 memset(job, 0, sizeof *job); 1508 job->job_state = JOB_ST_SETUP; 1509 if (gn->type & OP_SPECIAL) 1510 flags |= JOB_SPECIAL; 1511 1512 job->node = gn; 1513 job->tailCmds = NULL; 1514 1515 /* 1516 * Set the initial value of the flags for this job based on the global 1517 * ones and the node's attributes... Any flags supplied by the caller 1518 * are also added to the field. 1519 */ 1520 job->flags = 0; 1521 if (Targ_Ignore(gn)) { 1522 job->flags |= JOB_IGNERR; 1523 } 1524 if (Targ_Silent(gn)) { 1525 job->flags |= JOB_SILENT; 1526 } 1527 job->flags |= flags; 1528 1529 /* 1530 * Check the commands now so any attributes from .DEFAULT have a chance 1531 * to migrate to the node 1532 */ 1533 cmdsOK = Job_CheckCommands(gn, Error); 1534 1535 job->inPollfd = NULL; 1536 /* 1537 * If the -n flag wasn't given, we open up OUR (not the child's) 1538 * temporary file to stuff commands in it. The thing is rd/wr so we don't 1539 * need to reopen it to feed it to the shell. If the -n flag *was* given, 1540 * we just set the file to be stdout. Cute, huh? 1541 */ 1542 if (((gn->type & OP_MAKE) && !(noRecursiveExecute)) || 1543 (!noExecute && !touchFlag)) { 1544 /* 1545 * tfile is the name of a file into which all shell commands are 1546 * put. It is removed before the child shell is executed, unless 1547 * DEBUG(SCRIPT) is set. 1548 */ 1549 char *tfile; 1550 sigset_t mask; 1551 /* 1552 * We're serious here, but if the commands were bogus, we're 1553 * also dead... 1554 */ 1555 if (!cmdsOK) { 1556 PrintOnError(gn, NULL); /* provide some clue */ 1557 DieHorribly(); 1558 } 1559 1560 JobSigLock(&mask); 1561 tfd = mkTempFile(TMPPAT, &tfile); 1562 if (!DEBUG(SCRIPT)) 1563 (void)eunlink(tfile); 1564 JobSigUnlock(&mask); 1565 1566 job->cmdFILE = fdopen(tfd, "w+"); 1567 if (job->cmdFILE == NULL) { 1568 Punt("Could not fdopen %s", tfile); 1569 } 1570 (void)fcntl(FILENO(job->cmdFILE), F_SETFD, 1); 1571 /* 1572 * Send the commands to the command file, flush all its buffers then 1573 * rewind and remove the thing. 1574 */ 1575 noExec = FALSE; 1576 1577 /* 1578 * We can do all the commands at once. hooray for sanity 1579 */ 1580 numCommands = 0; 1581 Lst_ForEach(gn->commands, JobPrintCommand, job); 1582 1583 /* 1584 * If we didn't print out any commands to the shell script, 1585 * there's not much point in executing the shell, is there? 1586 */ 1587 if (numCommands == 0) { 1588 noExec = TRUE; 1589 } 1590 1591 free(tfile); 1592 } else if (NoExecute(gn)) { 1593 /* 1594 * Not executing anything -- just print all the commands to stdout 1595 * in one fell swoop. This will still set up job->tailCmds correctly. 1596 */ 1597 if (lastNode != gn) { 1598 MESSAGE(stdout, gn); 1599 lastNode = gn; 1600 } 1601 job->cmdFILE = stdout; 1602 /* 1603 * Only print the commands if they're ok, but don't die if they're 1604 * not -- just let the user know they're bad and keep going. It 1605 * doesn't do any harm in this case and may do some good. 1606 */ 1607 if (cmdsOK) { 1608 Lst_ForEach(gn->commands, JobPrintCommand, job); 1609 } 1610 /* 1611 * Don't execute the shell, thank you. 1612 */ 1613 noExec = TRUE; 1614 } else { 1615 /* 1616 * Just touch the target and note that no shell should be executed. 1617 * Set cmdFILE to stdout to make life easier. Check the commands, too, 1618 * but don't die if they're no good -- it does no harm to keep working 1619 * up the graph. 1620 */ 1621 job->cmdFILE = stdout; 1622 Job_Touch(gn, job->flags&JOB_SILENT); 1623 noExec = TRUE; 1624 } 1625 /* Just in case it isn't already... */ 1626 (void)fflush(job->cmdFILE); 1627 1628 /* 1629 * If we're not supposed to execute a shell, don't. 1630 */ 1631 if (noExec) { 1632 if (!(job->flags & JOB_SPECIAL)) 1633 Job_TokenReturn(); 1634 /* 1635 * Unlink and close the command file if we opened one 1636 */ 1637 if (job->cmdFILE != stdout) { 1638 if (job->cmdFILE != NULL) { 1639 (void)fclose(job->cmdFILE); 1640 job->cmdFILE = NULL; 1641 } 1642 } 1643 1644 /* 1645 * We only want to work our way up the graph if we aren't here because 1646 * the commands for the job were no good. 1647 */ 1648 if (cmdsOK && aborting == 0) { 1649 if (job->tailCmds != NULL) { 1650 Lst_ForEachFrom(job->node->commands, job->tailCmds, 1651 JobSaveCommand, 1652 job->node); 1653 } 1654 job->node->made = MADE; 1655 Make_Update(job->node); 1656 } 1657 job->job_state = JOB_ST_FREE; 1658 return cmdsOK ? JOB_FINISHED : JOB_ERROR; 1659 } 1660 1661 /* 1662 * Set up the control arguments to the shell. This is based on the flags 1663 * set earlier for this job. 1664 */ 1665 JobMakeArgv(job, argv); 1666 1667 /* Create the pipe by which we'll get the shell's output. */ 1668 JobCreatePipe(job, 3); 1669 1670 JobExec(job, argv); 1671 return(JOB_RUNNING); 1672 } 1673 1674 static char * 1675 JobOutput(Job *job, char *cp, char *endp, int msg) 1676 { 1677 char *ecp; 1678 1679 if (commandShell->noPrint) { 1680 ecp = Str_FindSubstring(cp, commandShell->noPrint); 1681 while (ecp != NULL) { 1682 if (cp != ecp) { 1683 *ecp = '\0'; 1684 if (!beSilent && msg && job->node != lastNode) { 1685 MESSAGE(stdout, job->node); 1686 lastNode = job->node; 1687 } 1688 /* 1689 * The only way there wouldn't be a newline after 1690 * this line is if it were the last in the buffer. 1691 * however, since the non-printable comes after it, 1692 * there must be a newline, so we don't print one. 1693 */ 1694 (void)fprintf(stdout, "%s", cp); 1695 (void)fflush(stdout); 1696 } 1697 cp = ecp + commandShell->noPLen; 1698 if (cp != endp) { 1699 /* 1700 * Still more to print, look again after skipping 1701 * the whitespace following the non-printable 1702 * command.... 1703 */ 1704 cp++; 1705 while (*cp == ' ' || *cp == '\t' || *cp == '\n') { 1706 cp++; 1707 } 1708 ecp = Str_FindSubstring(cp, commandShell->noPrint); 1709 } else { 1710 return cp; 1711 } 1712 } 1713 } 1714 return cp; 1715 } 1716 1717 /*- 1718 *----------------------------------------------------------------------- 1719 * JobDoOutput -- 1720 * This function is called at different times depending on 1721 * whether the user has specified that output is to be collected 1722 * via pipes or temporary files. In the former case, we are called 1723 * whenever there is something to read on the pipe. We collect more 1724 * output from the given job and store it in the job's outBuf. If 1725 * this makes up a line, we print it tagged by the job's identifier, 1726 * as necessary. 1727 * If output has been collected in a temporary file, we open the 1728 * file and read it line by line, transfering it to our own 1729 * output channel until the file is empty. At which point we 1730 * remove the temporary file. 1731 * In both cases, however, we keep our figurative eye out for the 1732 * 'noPrint' line for the shell from which the output came. If 1733 * we recognize a line, we don't print it. If the command is not 1734 * alone on the line (the character after it is not \0 or \n), we 1735 * do print whatever follows it. 1736 * 1737 * Input: 1738 * job the job whose output needs printing 1739 * finish TRUE if this is the last time we'll be called 1740 * for this job 1741 * 1742 * Results: 1743 * None 1744 * 1745 * Side Effects: 1746 * curPos may be shifted as may the contents of outBuf. 1747 *----------------------------------------------------------------------- 1748 */ 1749 STATIC void 1750 JobDoOutput(Job *job, Boolean finish) 1751 { 1752 Boolean gotNL = FALSE; /* true if got a newline */ 1753 Boolean fbuf; /* true if our buffer filled up */ 1754 int nr; /* number of bytes read */ 1755 int i; /* auxiliary index into outBuf */ 1756 int max; /* limit for i (end of current data) */ 1757 int nRead; /* (Temporary) number of bytes read */ 1758 1759 /* 1760 * Read as many bytes as will fit in the buffer. 1761 */ 1762 end_loop: 1763 gotNL = FALSE; 1764 fbuf = FALSE; 1765 1766 nRead = read(job->inPipe, &job->outBuf[job->curPos], 1767 JOB_BUFSIZE - job->curPos); 1768 if (nRead < 0) { 1769 if (errno == EAGAIN) 1770 return; 1771 if (DEBUG(JOB)) { 1772 perror("JobDoOutput(piperead)"); 1773 } 1774 nr = 0; 1775 } else { 1776 nr = nRead; 1777 } 1778 1779 /* 1780 * If we hit the end-of-file (the job is dead), we must flush its 1781 * remaining output, so pretend we read a newline if there's any 1782 * output remaining in the buffer. 1783 * Also clear the 'finish' flag so we stop looping. 1784 */ 1785 if ((nr == 0) && (job->curPos != 0)) { 1786 job->outBuf[job->curPos] = '\n'; 1787 nr = 1; 1788 finish = FALSE; 1789 } else if (nr == 0) { 1790 finish = FALSE; 1791 } 1792 1793 /* 1794 * Look for the last newline in the bytes we just got. If there is 1795 * one, break out of the loop with 'i' as its index and gotNL set 1796 * TRUE. 1797 */ 1798 max = job->curPos + nr; 1799 for (i = job->curPos + nr - 1; i >= job->curPos; i--) { 1800 if (job->outBuf[i] == '\n') { 1801 gotNL = TRUE; 1802 break; 1803 } else if (job->outBuf[i] == '\0') { 1804 /* 1805 * Why? 1806 */ 1807 job->outBuf[i] = ' '; 1808 } 1809 } 1810 1811 if (!gotNL) { 1812 job->curPos += nr; 1813 if (job->curPos == JOB_BUFSIZE) { 1814 /* 1815 * If we've run out of buffer space, we have no choice 1816 * but to print the stuff. sigh. 1817 */ 1818 fbuf = TRUE; 1819 i = job->curPos; 1820 } 1821 } 1822 if (gotNL || fbuf) { 1823 /* 1824 * Need to send the output to the screen. Null terminate it 1825 * first, overwriting the newline character if there was one. 1826 * So long as the line isn't one we should filter (according 1827 * to the shell description), we print the line, preceded 1828 * by a target banner if this target isn't the same as the 1829 * one for which we last printed something. 1830 * The rest of the data in the buffer are then shifted down 1831 * to the start of the buffer and curPos is set accordingly. 1832 */ 1833 job->outBuf[i] = '\0'; 1834 if (i >= job->curPos) { 1835 char *cp; 1836 1837 cp = JobOutput(job, job->outBuf, &job->outBuf[i], FALSE); 1838 1839 /* 1840 * There's still more in that thar buffer. This time, though, 1841 * we know there's no newline at the end, so we add one of 1842 * our own free will. 1843 */ 1844 if (*cp != '\0') { 1845 if (!beSilent && job->node != lastNode) { 1846 MESSAGE(stdout, job->node); 1847 lastNode = job->node; 1848 } 1849 (void)fprintf(stdout, "%s%s", cp, gotNL ? "\n" : ""); 1850 (void)fflush(stdout); 1851 } 1852 } 1853 if (i < max - 1) { 1854 /* shift the remaining characters down */ 1855 (void)memcpy(job->outBuf, &job->outBuf[i + 1], max - (i + 1)); 1856 job->curPos = max - (i + 1); 1857 1858 } else { 1859 /* 1860 * We have written everything out, so we just start over 1861 * from the start of the buffer. No copying. No nothing. 1862 */ 1863 job->curPos = 0; 1864 } 1865 } 1866 if (finish) { 1867 /* 1868 * If the finish flag is true, we must loop until we hit 1869 * end-of-file on the pipe. This is guaranteed to happen 1870 * eventually since the other end of the pipe is now closed 1871 * (we closed it explicitly and the child has exited). When 1872 * we do get an EOF, finish will be set FALSE and we'll fall 1873 * through and out. 1874 */ 1875 goto end_loop; 1876 } 1877 } 1878 1879 static void 1880 JobRun(GNode *targ) 1881 { 1882 #ifdef notyet 1883 /* 1884 * Unfortunately it is too complicated to run .BEGIN, .END, 1885 * and .INTERRUPT job in the parallel job module. This has 1886 * the nice side effect that it avoids a lot of other problems. 1887 */ 1888 Lst lst = Lst_Init(FALSE); 1889 Lst_AtEnd(lst, targ); 1890 (void)Make_Run(lst); 1891 Lst_Destroy(lst, NULL); 1892 JobStart(targ, JOB_SPECIAL); 1893 while (jobTokensRunning) { 1894 Job_CatchOutput(); 1895 } 1896 #else 1897 Compat_Make(targ, targ); 1898 if (targ->made == ERROR) { 1899 PrintOnError(targ, "\n\nStop."); 1900 exit(1); 1901 } 1902 #endif 1903 } 1904 1905 /*- 1906 *----------------------------------------------------------------------- 1907 * Job_CatchChildren -- 1908 * Handle the exit of a child. Called from Make_Make. 1909 * 1910 * Input: 1911 * block TRUE if should block on the wait 1912 * 1913 * Results: 1914 * none. 1915 * 1916 * Side Effects: 1917 * The job descriptor is removed from the list of children. 1918 * 1919 * Notes: 1920 * We do waits, blocking or not, according to the wisdom of our 1921 * caller, until there are no more children to report. For each 1922 * job, call JobFinish to finish things off. 1923 * 1924 *----------------------------------------------------------------------- 1925 */ 1926 1927 void 1928 Job_CatchChildren(void) 1929 { 1930 int pid; /* pid of dead child */ 1931 int status; /* Exit/termination status */ 1932 1933 /* 1934 * Don't even bother if we know there's no one around. 1935 */ 1936 if (jobTokensRunning == 0) 1937 return; 1938 1939 while ((pid = waitpid((pid_t) -1, &status, WNOHANG | WUNTRACED)) > 0) { 1940 if (DEBUG(JOB)) { 1941 (void)fprintf(debug_file, "Process %d exited/stopped status %x.\n", pid, 1942 status); 1943 } 1944 JobReapChild(pid, status, TRUE); 1945 } 1946 } 1947 1948 /* 1949 * It is possible that wait[pid]() was called from elsewhere, 1950 * this lets us reap jobs regardless. 1951 */ 1952 void 1953 JobReapChild(pid_t pid, int status, Boolean isJobs) 1954 { 1955 Job *job; /* job descriptor for dead child */ 1956 1957 /* 1958 * Don't even bother if we know there's no one around. 1959 */ 1960 if (jobTokensRunning == 0) 1961 return; 1962 1963 job = JobFindPid(pid, JOB_ST_RUNNING, isJobs); 1964 if (job == NULL) { 1965 if (isJobs) { 1966 if (!lurking_children) 1967 Error("Child (%d) status %x not in table?", pid, status); 1968 } 1969 return; /* not ours */ 1970 } 1971 if (WIFSTOPPED(status)) { 1972 if (DEBUG(JOB)) { 1973 (void)fprintf(debug_file, "Process %d (%s) stopped.\n", 1974 job->pid, job->node->name); 1975 } 1976 if (!make_suspended) { 1977 switch (WSTOPSIG(status)) { 1978 case SIGTSTP: 1979 (void)printf("*** [%s] Suspended\n", job->node->name); 1980 break; 1981 case SIGSTOP: 1982 (void)printf("*** [%s] Stopped\n", job->node->name); 1983 break; 1984 default: 1985 (void)printf("*** [%s] Stopped -- signal %d\n", 1986 job->node->name, WSTOPSIG(status)); 1987 } 1988 job->job_suspended = 1; 1989 } 1990 (void)fflush(stdout); 1991 return; 1992 } 1993 1994 job->job_state = JOB_ST_FINISHED; 1995 job->exit_status = status; 1996 1997 JobFinish(job, status); 1998 } 1999 2000 /*- 2001 *----------------------------------------------------------------------- 2002 * Job_CatchOutput -- 2003 * Catch the output from our children, if we're using 2004 * pipes do so. Otherwise just block time until we get a 2005 * signal(most likely a SIGCHLD) since there's no point in 2006 * just spinning when there's nothing to do and the reaping 2007 * of a child can wait for a while. 2008 * 2009 * Results: 2010 * None 2011 * 2012 * Side Effects: 2013 * Output is read from pipes if we're piping. 2014 * ----------------------------------------------------------------------- 2015 */ 2016 void 2017 Job_CatchOutput(void) 2018 { 2019 int nready; 2020 Job *job; 2021 int i; 2022 2023 (void)fflush(stdout); 2024 2025 /* The first fd in the list is the job token pipe */ 2026 nready = poll(fds + 1 - wantToken, nfds - 1 + wantToken, POLL_MSEC); 2027 2028 if (nready < 0 || readyfd(&childExitJob)) { 2029 char token = 0; 2030 nready -= 1; 2031 (void)read(childExitJob.inPipe, &token, 1); 2032 if (token == DO_JOB_RESUME[0]) 2033 /* Complete relay requested from our SIGCONT handler */ 2034 JobRestartJobs(); 2035 Job_CatchChildren(); 2036 } 2037 2038 if (nready <= 0) 2039 return; 2040 2041 if (wantToken && readyfd(&tokenWaitJob)) 2042 nready--; 2043 2044 for (i = 2; i < nfds; i++) { 2045 if (!fds[i].revents) 2046 continue; 2047 job = jobfds[i]; 2048 if (job->job_state != JOB_ST_RUNNING) 2049 continue; 2050 JobDoOutput(job, FALSE); 2051 } 2052 } 2053 2054 /*- 2055 *----------------------------------------------------------------------- 2056 * Job_Make -- 2057 * Start the creation of a target. Basically a front-end for 2058 * JobStart used by the Make module. 2059 * 2060 * Results: 2061 * None. 2062 * 2063 * Side Effects: 2064 * Another job is started. 2065 * 2066 *----------------------------------------------------------------------- 2067 */ 2068 void 2069 Job_Make(GNode *gn) 2070 { 2071 (void)JobStart(gn, 0); 2072 } 2073 2074 void 2075 Shell_Init(void) 2076 { 2077 if (shellPath == NULL) { 2078 /* 2079 * We are using the default shell, which may be an absolute 2080 * path if DEFSHELL_CUSTOM is defined. 2081 */ 2082 shellName = commandShell->name; 2083 #ifdef DEFSHELL_CUSTOM 2084 if (*shellName == '/') { 2085 shellPath = shellName; 2086 shellName = strrchr(shellPath, '/'); 2087 shellName++; 2088 } else 2089 #endif 2090 shellPath = str_concat(_PATH_DEFSHELLDIR, shellName, STR_ADDSLASH); 2091 } 2092 if (commandShell->exit == NULL) { 2093 commandShell->exit = ""; 2094 } 2095 if (commandShell->echo == NULL) { 2096 commandShell->echo = ""; 2097 } 2098 } 2099 2100 /*- 2101 * Returns the string literal that is used in the current command shell 2102 * to produce a newline character. 2103 */ 2104 const char * 2105 Shell_GetNewline(void) 2106 { 2107 2108 return commandShell->newline; 2109 } 2110 2111 void 2112 Job_SetPrefix(void) 2113 { 2114 2115 if (targPrefix) { 2116 free(targPrefix); 2117 } else if (!Var_Exists(MAKE_JOB_PREFIX, VAR_GLOBAL)) { 2118 Var_Set(MAKE_JOB_PREFIX, "---", VAR_GLOBAL, 0); 2119 } 2120 2121 targPrefix = Var_Subst(NULL, "${" MAKE_JOB_PREFIX "}", VAR_GLOBAL, 0); 2122 } 2123 2124 /*- 2125 *----------------------------------------------------------------------- 2126 * Job_Init -- 2127 * Initialize the process module 2128 * 2129 * Input: 2130 * 2131 * Results: 2132 * none 2133 * 2134 * Side Effects: 2135 * lists and counters are initialized 2136 *----------------------------------------------------------------------- 2137 */ 2138 void 2139 Job_Init(void) 2140 { 2141 GNode *begin; /* node for commands to do at the very start */ 2142 2143 /* Allocate space for all the job info */ 2144 job_table = bmake_malloc(maxJobs * sizeof *job_table); 2145 memset(job_table, 0, maxJobs * sizeof *job_table); 2146 job_table_end = job_table + maxJobs; 2147 wantToken = 0; 2148 2149 aborting = 0; 2150 errors = 0; 2151 2152 lastNode = NULL; 2153 2154 if (maxJobs == 1) { 2155 /* 2156 * If only one job can run at a time, there's no need for a banner, 2157 * is there? 2158 */ 2159 targFmt = ""; 2160 } else { 2161 targFmt = TARG_FMT; 2162 } 2163 2164 /* 2165 * There is a non-zero chance that we already have children. 2166 * eg after 'make -f- <<EOF' 2167 * Since their termination causes a 'Child (pid) not in table' message, 2168 * Collect the status of any that are already dead, and suppress the 2169 * error message if there are any undead ones. 2170 */ 2171 for (;;) { 2172 int rval, status; 2173 rval = waitpid((pid_t) -1, &status, WNOHANG); 2174 if (rval > 0) 2175 continue; 2176 if (rval == 0) 2177 lurking_children = 1; 2178 break; 2179 } 2180 2181 Shell_Init(); 2182 2183 JobCreatePipe(&childExitJob, 3); 2184 2185 /* We can only need to wait for tokens, children and output from each job */ 2186 fds = bmake_malloc(sizeof (*fds) * (2 + maxJobs)); 2187 jobfds = bmake_malloc(sizeof (*jobfds) * (2 + maxJobs)); 2188 2189 /* These are permanent entries and take slots 0 and 1 */ 2190 watchfd(&tokenWaitJob); 2191 watchfd(&childExitJob); 2192 2193 sigemptyset(&caught_signals); 2194 /* 2195 * Install a SIGCHLD handler. 2196 */ 2197 (void)bmake_signal(SIGCHLD, JobChildSig); 2198 sigaddset(&caught_signals, SIGCHLD); 2199 2200 #define ADDSIG(s,h) \ 2201 if (bmake_signal(s, SIG_IGN) != SIG_IGN) { \ 2202 sigaddset(&caught_signals, s); \ 2203 (void)bmake_signal(s, h); \ 2204 } 2205 2206 /* 2207 * Catch the four signals that POSIX specifies if they aren't ignored. 2208 * JobPassSig will take care of calling JobInterrupt if appropriate. 2209 */ 2210 ADDSIG(SIGINT, JobPassSig_int) 2211 ADDSIG(SIGHUP, JobPassSig_term) 2212 ADDSIG(SIGTERM, JobPassSig_term) 2213 ADDSIG(SIGQUIT, JobPassSig_term) 2214 2215 /* 2216 * There are additional signals that need to be caught and passed if 2217 * either the export system wants to be told directly of signals or if 2218 * we're giving each job its own process group (since then it won't get 2219 * signals from the terminal driver as we own the terminal) 2220 */ 2221 ADDSIG(SIGTSTP, JobPassSig_suspend) 2222 ADDSIG(SIGTTOU, JobPassSig_suspend) 2223 ADDSIG(SIGTTIN, JobPassSig_suspend) 2224 ADDSIG(SIGWINCH, JobCondPassSig) 2225 ADDSIG(SIGCONT, JobContinueSig) 2226 #undef ADDSIG 2227 2228 begin = Targ_FindNode(".BEGIN", TARG_NOCREATE); 2229 2230 if (begin != NULL) { 2231 JobRun(begin); 2232 if (begin->made == ERROR) { 2233 PrintOnError(begin, "\n\nStop."); 2234 exit(1); 2235 } 2236 } 2237 postCommands = Targ_FindNode(".END", TARG_CREATE); 2238 } 2239 2240 static void JobSigReset(void) 2241 { 2242 #define DELSIG(s) \ 2243 if (sigismember(&caught_signals, s)) { \ 2244 (void)bmake_signal(s, SIG_DFL); \ 2245 } 2246 2247 DELSIG(SIGINT) 2248 DELSIG(SIGHUP) 2249 DELSIG(SIGQUIT) 2250 DELSIG(SIGTERM) 2251 DELSIG(SIGTSTP) 2252 DELSIG(SIGTTOU) 2253 DELSIG(SIGTTIN) 2254 DELSIG(SIGWINCH) 2255 DELSIG(SIGCONT) 2256 #undef DELSIG 2257 (void)bmake_signal(SIGCHLD, SIG_DFL); 2258 } 2259 2260 /*- 2261 *----------------------------------------------------------------------- 2262 * JobMatchShell -- 2263 * Find a shell in 'shells' given its name. 2264 * 2265 * Results: 2266 * A pointer to the Shell structure. 2267 * 2268 * Side Effects: 2269 * None. 2270 * 2271 *----------------------------------------------------------------------- 2272 */ 2273 static Shell * 2274 JobMatchShell(const char *name) 2275 { 2276 Shell *sh; 2277 2278 for (sh = shells; sh->name != NULL; sh++) { 2279 if (strcmp(name, sh->name) == 0) 2280 return (sh); 2281 } 2282 return NULL; 2283 } 2284 2285 /*- 2286 *----------------------------------------------------------------------- 2287 * Job_ParseShell -- 2288 * Parse a shell specification and set up commandShell, shellPath 2289 * and shellName appropriately. 2290 * 2291 * Input: 2292 * line The shell spec 2293 * 2294 * Results: 2295 * FAILURE if the specification was incorrect. 2296 * 2297 * Side Effects: 2298 * commandShell points to a Shell structure (either predefined or 2299 * created from the shell spec), shellPath is the full path of the 2300 * shell described by commandShell, while shellName is just the 2301 * final component of shellPath. 2302 * 2303 * Notes: 2304 * A shell specification consists of a .SHELL target, with dependency 2305 * operator, followed by a series of blank-separated words. Double 2306 * quotes can be used to use blanks in words. A backslash escapes 2307 * anything (most notably a double-quote and a space) and 2308 * provides the functionality it does in C. Each word consists of 2309 * keyword and value separated by an equal sign. There should be no 2310 * unnecessary spaces in the word. The keywords are as follows: 2311 * name Name of shell. 2312 * path Location of shell. 2313 * quiet Command to turn off echoing. 2314 * echo Command to turn echoing on 2315 * filter Result of turning off echoing that shouldn't be 2316 * printed. 2317 * echoFlag Flag to turn echoing on at the start 2318 * errFlag Flag to turn error checking on at the start 2319 * hasErrCtl True if shell has error checking control 2320 * newline String literal to represent a newline char 2321 * check Command to turn on error checking if hasErrCtl 2322 * is TRUE or template of command to echo a command 2323 * for which error checking is off if hasErrCtl is 2324 * FALSE. 2325 * ignore Command to turn off error checking if hasErrCtl 2326 * is TRUE or template of command to execute a 2327 * command so as to ignore any errors it returns if 2328 * hasErrCtl is FALSE. 2329 * 2330 *----------------------------------------------------------------------- 2331 */ 2332 ReturnStatus 2333 Job_ParseShell(char *line) 2334 { 2335 char **words; 2336 char **argv; 2337 int argc; 2338 char *path; 2339 Shell newShell; 2340 Boolean fullSpec = FALSE; 2341 Shell *sh; 2342 2343 while (isspace((unsigned char)*line)) { 2344 line++; 2345 } 2346 2347 if (shellArgv) 2348 free(UNCONST(shellArgv)); 2349 2350 memset(&newShell, 0, sizeof(newShell)); 2351 2352 /* 2353 * Parse the specification by keyword 2354 */ 2355 words = brk_string(line, &argc, TRUE, &path); 2356 if (words == NULL) { 2357 Error("Unterminated quoted string [%s]", line); 2358 return FAILURE; 2359 } 2360 shellArgv = path; 2361 2362 for (path = NULL, argv = words; argc != 0; argc--, argv++) { 2363 if (strncmp(*argv, "path=", 5) == 0) { 2364 path = &argv[0][5]; 2365 } else if (strncmp(*argv, "name=", 5) == 0) { 2366 newShell.name = &argv[0][5]; 2367 } else { 2368 if (strncmp(*argv, "quiet=", 6) == 0) { 2369 newShell.echoOff = &argv[0][6]; 2370 } else if (strncmp(*argv, "echo=", 5) == 0) { 2371 newShell.echoOn = &argv[0][5]; 2372 } else if (strncmp(*argv, "filter=", 7) == 0) { 2373 newShell.noPrint = &argv[0][7]; 2374 newShell.noPLen = strlen(newShell.noPrint); 2375 } else if (strncmp(*argv, "echoFlag=", 9) == 0) { 2376 newShell.echo = &argv[0][9]; 2377 } else if (strncmp(*argv, "errFlag=", 8) == 0) { 2378 newShell.exit = &argv[0][8]; 2379 } else if (strncmp(*argv, "hasErrCtl=", 10) == 0) { 2380 char c = argv[0][10]; 2381 newShell.hasErrCtl = !((c != 'Y') && (c != 'y') && 2382 (c != 'T') && (c != 't')); 2383 } else if (strncmp(*argv, "newline=", 8) == 0) { 2384 newShell.newline = &argv[0][8]; 2385 } else if (strncmp(*argv, "check=", 6) == 0) { 2386 newShell.errCheck = &argv[0][6]; 2387 } else if (strncmp(*argv, "ignore=", 7) == 0) { 2388 newShell.ignErr = &argv[0][7]; 2389 } else if (strncmp(*argv, "errout=", 7) == 0) { 2390 newShell.errOut = &argv[0][7]; 2391 } else if (strncmp(*argv, "comment=", 8) == 0) { 2392 newShell.commentChar = argv[0][8]; 2393 } else { 2394 Parse_Error(PARSE_FATAL, "Unknown keyword \"%s\"", 2395 *argv); 2396 free(words); 2397 return(FAILURE); 2398 } 2399 fullSpec = TRUE; 2400 } 2401 } 2402 2403 if (path == NULL) { 2404 /* 2405 * If no path was given, the user wants one of the pre-defined shells, 2406 * yes? So we find the one s/he wants with the help of JobMatchShell 2407 * and set things up the right way. shellPath will be set up by 2408 * Job_Init. 2409 */ 2410 if (newShell.name == NULL) { 2411 Parse_Error(PARSE_FATAL, "Neither path nor name specified"); 2412 free(words); 2413 return(FAILURE); 2414 } else { 2415 if ((sh = JobMatchShell(newShell.name)) == NULL) { 2416 Parse_Error(PARSE_WARNING, "%s: No matching shell", 2417 newShell.name); 2418 free(words); 2419 return(FAILURE); 2420 } 2421 commandShell = sh; 2422 shellName = newShell.name; 2423 } 2424 } else { 2425 /* 2426 * The user provided a path. If s/he gave nothing else (fullSpec is 2427 * FALSE), try and find a matching shell in the ones we know of. 2428 * Else we just take the specification at its word and copy it 2429 * to a new location. In either case, we need to record the 2430 * path the user gave for the shell. 2431 */ 2432 shellPath = path; 2433 path = strrchr(path, '/'); 2434 if (path == NULL) { 2435 path = UNCONST(shellPath); 2436 } else { 2437 path += 1; 2438 } 2439 if (newShell.name != NULL) { 2440 shellName = newShell.name; 2441 } else { 2442 shellName = path; 2443 } 2444 if (!fullSpec) { 2445 if ((sh = JobMatchShell(shellName)) == NULL) { 2446 Parse_Error(PARSE_WARNING, "%s: No matching shell", 2447 shellName); 2448 free(words); 2449 return(FAILURE); 2450 } 2451 commandShell = sh; 2452 } else { 2453 commandShell = bmake_malloc(sizeof(Shell)); 2454 *commandShell = newShell; 2455 } 2456 } 2457 2458 if (commandShell->echoOn && commandShell->echoOff) { 2459 commandShell->hasEchoCtl = TRUE; 2460 } 2461 2462 if (!commandShell->hasErrCtl) { 2463 if (commandShell->errCheck == NULL) { 2464 commandShell->errCheck = ""; 2465 } 2466 if (commandShell->ignErr == NULL) { 2467 commandShell->ignErr = "%s\n"; 2468 } 2469 } 2470 2471 /* 2472 * Do not free up the words themselves, since they might be in use by the 2473 * shell specification. 2474 */ 2475 free(words); 2476 return SUCCESS; 2477 } 2478 2479 /*- 2480 *----------------------------------------------------------------------- 2481 * JobInterrupt -- 2482 * Handle the receipt of an interrupt. 2483 * 2484 * Input: 2485 * runINTERRUPT Non-zero if commands for the .INTERRUPT target 2486 * should be executed 2487 * signo signal received 2488 * 2489 * Results: 2490 * None 2491 * 2492 * Side Effects: 2493 * All children are killed. Another job will be started if the 2494 * .INTERRUPT target was given. 2495 *----------------------------------------------------------------------- 2496 */ 2497 static void 2498 JobInterrupt(int runINTERRUPT, int signo) 2499 { 2500 Job *job; /* job descriptor in that element */ 2501 GNode *interrupt; /* the node describing the .INTERRUPT target */ 2502 sigset_t mask; 2503 GNode *gn; 2504 2505 aborting = ABORT_INTERRUPT; 2506 2507 JobSigLock(&mask); 2508 2509 for (job = job_table; job < job_table_end; job++) { 2510 if (job->job_state != JOB_ST_RUNNING) 2511 continue; 2512 2513 gn = job->node; 2514 2515 if ((gn->type & (OP_JOIN|OP_PHONY)) == 0 && !Targ_Precious(gn)) { 2516 char *file = (gn->path == NULL ? gn->name : gn->path); 2517 if (!noExecute && eunlink(file) != -1) { 2518 Error("*** %s removed", file); 2519 } 2520 } 2521 if (job->pid) { 2522 if (DEBUG(JOB)) { 2523 (void)fprintf(debug_file, 2524 "JobInterrupt passing signal %d to child %d.\n", 2525 signo, job->pid); 2526 } 2527 KILLPG(job->pid, signo); 2528 } 2529 } 2530 2531 JobSigUnlock(&mask); 2532 2533 if (runINTERRUPT && !touchFlag) { 2534 interrupt = Targ_FindNode(".INTERRUPT", TARG_NOCREATE); 2535 if (interrupt != NULL) { 2536 ignoreErrors = FALSE; 2537 JobRun(interrupt); 2538 } 2539 } 2540 Trace_Log(MAKEINTR, 0); 2541 exit(signo); 2542 } 2543 2544 /* 2545 *----------------------------------------------------------------------- 2546 * Job_Finish -- 2547 * Do final processing such as the running of the commands 2548 * attached to the .END target. 2549 * 2550 * Results: 2551 * Number of errors reported. 2552 * 2553 * Side Effects: 2554 * None. 2555 *----------------------------------------------------------------------- 2556 */ 2557 int 2558 Job_Finish(void) 2559 { 2560 if (postCommands != NULL && 2561 (!Lst_IsEmpty(postCommands->commands) || 2562 !Lst_IsEmpty(postCommands->children))) { 2563 if (errors) { 2564 Error("Errors reported so .END ignored"); 2565 } else { 2566 JobRun(postCommands); 2567 } 2568 } 2569 return(errors); 2570 } 2571 2572 /*- 2573 *----------------------------------------------------------------------- 2574 * Job_End -- 2575 * Cleanup any memory used by the jobs module 2576 * 2577 * Results: 2578 * None. 2579 * 2580 * Side Effects: 2581 * Memory is freed 2582 *----------------------------------------------------------------------- 2583 */ 2584 void 2585 Job_End(void) 2586 { 2587 #ifdef CLEANUP 2588 if (shellArgv) 2589 free(shellArgv); 2590 #endif 2591 } 2592 2593 /*- 2594 *----------------------------------------------------------------------- 2595 * Job_Wait -- 2596 * Waits for all running jobs to finish and returns. Sets 'aborting' 2597 * to ABORT_WAIT to prevent other jobs from starting. 2598 * 2599 * Results: 2600 * None. 2601 * 2602 * Side Effects: 2603 * Currently running jobs finish. 2604 * 2605 *----------------------------------------------------------------------- 2606 */ 2607 void 2608 Job_Wait(void) 2609 { 2610 aborting = ABORT_WAIT; 2611 while (jobTokensRunning != 0) { 2612 Job_CatchOutput(); 2613 } 2614 aborting = 0; 2615 } 2616 2617 /*- 2618 *----------------------------------------------------------------------- 2619 * Job_AbortAll -- 2620 * Abort all currently running jobs without handling output or anything. 2621 * This function is to be called only in the event of a major 2622 * error. Most definitely NOT to be called from JobInterrupt. 2623 * 2624 * Results: 2625 * None 2626 * 2627 * Side Effects: 2628 * All children are killed, not just the firstborn 2629 *----------------------------------------------------------------------- 2630 */ 2631 void 2632 Job_AbortAll(void) 2633 { 2634 Job *job; /* the job descriptor in that element */ 2635 int foo; 2636 2637 aborting = ABORT_ERROR; 2638 2639 if (jobTokensRunning) { 2640 for (job = job_table; job < job_table_end; job++) { 2641 if (job->job_state != JOB_ST_RUNNING) 2642 continue; 2643 /* 2644 * kill the child process with increasingly drastic signals to make 2645 * darn sure it's dead. 2646 */ 2647 KILLPG(job->pid, SIGINT); 2648 KILLPG(job->pid, SIGKILL); 2649 } 2650 } 2651 2652 /* 2653 * Catch as many children as want to report in at first, then give up 2654 */ 2655 while (waitpid((pid_t) -1, &foo, WNOHANG) > 0) 2656 continue; 2657 } 2658 2659 2660 /*- 2661 *----------------------------------------------------------------------- 2662 * JobRestartJobs -- 2663 * Tries to restart stopped jobs if there are slots available. 2664 * Called in process context in response to a SIGCONT. 2665 * 2666 * Results: 2667 * None. 2668 * 2669 * Side Effects: 2670 * Resumes jobs. 2671 * 2672 *----------------------------------------------------------------------- 2673 */ 2674 static void 2675 JobRestartJobs(void) 2676 { 2677 Job *job; 2678 2679 for (job = job_table; job < job_table_end; job++) { 2680 if (job->job_state == JOB_ST_RUNNING && 2681 (make_suspended || job->job_suspended)) { 2682 if (DEBUG(JOB)) { 2683 (void)fprintf(debug_file, "Restarting stopped job pid %d.\n", 2684 job->pid); 2685 } 2686 if (job->job_suspended) { 2687 (void)printf("*** [%s] Continued\n", job->node->name); 2688 (void)fflush(stdout); 2689 } 2690 job->job_suspended = 0; 2691 if (KILLPG(job->pid, SIGCONT) != 0 && DEBUG(JOB)) { 2692 fprintf(debug_file, "Failed to send SIGCONT to %d\n", job->pid); 2693 } 2694 } 2695 if (job->job_state == JOB_ST_FINISHED) 2696 /* Job exit deferred after calling waitpid() in a signal handler */ 2697 JobFinish(job, job->exit_status); 2698 } 2699 make_suspended = 0; 2700 } 2701 2702 static void 2703 watchfd(Job *job) 2704 { 2705 if (job->inPollfd != NULL) 2706 Punt("Watching watched job"); 2707 2708 fds[nfds].fd = job->inPipe; 2709 fds[nfds].events = POLLIN; 2710 jobfds[nfds] = job; 2711 job->inPollfd = &fds[nfds]; 2712 nfds++; 2713 } 2714 2715 static void 2716 clearfd(Job *job) 2717 { 2718 int i; 2719 if (job->inPollfd == NULL) 2720 Punt("Unwatching unwatched job"); 2721 i = job->inPollfd - fds; 2722 nfds--; 2723 /* 2724 * Move last job in table into hole made by dead job. 2725 */ 2726 if (nfds != i) { 2727 fds[i] = fds[nfds]; 2728 jobfds[i] = jobfds[nfds]; 2729 jobfds[i]->inPollfd = &fds[i]; 2730 } 2731 job->inPollfd = NULL; 2732 } 2733 2734 static int 2735 readyfd(Job *job) 2736 { 2737 if (job->inPollfd == NULL) 2738 Punt("Polling unwatched job"); 2739 return (job->inPollfd->revents & POLLIN) != 0; 2740 } 2741 2742 /*- 2743 *----------------------------------------------------------------------- 2744 * JobTokenAdd -- 2745 * Put a token into the job pipe so that some make process can start 2746 * another job. 2747 * 2748 * Side Effects: 2749 * Allows more build jobs to be spawned somewhere. 2750 * 2751 *----------------------------------------------------------------------- 2752 */ 2753 2754 static void 2755 JobTokenAdd(void) 2756 { 2757 char tok = JOB_TOKENS[aborting], tok1; 2758 2759 /* If we are depositing an error token flush everything else */ 2760 while (tok != '+' && read(tokenWaitJob.inPipe, &tok1, 1) == 1) 2761 continue; 2762 2763 if (DEBUG(JOB)) 2764 fprintf(debug_file, "(%d) aborting %d, deposit token %c\n", 2765 getpid(), aborting, JOB_TOKENS[aborting]); 2766 write(tokenWaitJob.outPipe, &tok, 1); 2767 } 2768 2769 /*- 2770 *----------------------------------------------------------------------- 2771 * Job_ServerStartTokenAdd -- 2772 * Prep the job token pipe in the root make process. 2773 * 2774 *----------------------------------------------------------------------- 2775 */ 2776 2777 void 2778 Job_ServerStart(int max_tokens, int jp_0, int jp_1) 2779 { 2780 int i; 2781 char jobarg[64]; 2782 2783 if (jp_0 >= 0 && jp_1 >= 0) { 2784 /* Pipe passed in from parent */ 2785 tokenWaitJob.inPipe = jp_0; 2786 tokenWaitJob.outPipe = jp_1; 2787 return; 2788 } 2789 2790 JobCreatePipe(&tokenWaitJob, 15); 2791 2792 snprintf(jobarg, sizeof(jobarg), "%d,%d", 2793 tokenWaitJob.inPipe, tokenWaitJob.outPipe); 2794 2795 Var_Append(MAKEFLAGS, "-J", VAR_GLOBAL); 2796 Var_Append(MAKEFLAGS, jobarg, VAR_GLOBAL); 2797 2798 /* 2799 * Preload the job pipe with one token per job, save the one 2800 * "extra" token for the primary job. 2801 * 2802 * XXX should clip maxJobs against PIPE_BUF -- if max_tokens is 2803 * larger than the write buffer size of the pipe, we will 2804 * deadlock here. 2805 */ 2806 for (i = 1; i < max_tokens; i++) 2807 JobTokenAdd(); 2808 } 2809 2810 /*- 2811 *----------------------------------------------------------------------- 2812 * Job_TokenReturn -- 2813 * Return a withdrawn token to the pool. 2814 * 2815 *----------------------------------------------------------------------- 2816 */ 2817 2818 void 2819 Job_TokenReturn(void) 2820 { 2821 jobTokensRunning--; 2822 if (jobTokensRunning < 0) 2823 Punt("token botch"); 2824 if (jobTokensRunning || JOB_TOKENS[aborting] != '+') 2825 JobTokenAdd(); 2826 } 2827 2828 /*- 2829 *----------------------------------------------------------------------- 2830 * Job_TokenWithdraw -- 2831 * Attempt to withdraw a token from the pool. 2832 * 2833 * Results: 2834 * Returns TRUE if a token was withdrawn, and FALSE if the pool 2835 * is currently empty. 2836 * 2837 * Side Effects: 2838 * If pool is empty, set wantToken so that we wake up 2839 * when a token is released. 2840 * 2841 *----------------------------------------------------------------------- 2842 */ 2843 2844 2845 Boolean 2846 Job_TokenWithdraw(void) 2847 { 2848 char tok, tok1; 2849 int count; 2850 2851 wantToken = 0; 2852 if (DEBUG(JOB)) 2853 fprintf(debug_file, "Job_TokenWithdraw(%d): aborting %d, running %d\n", 2854 getpid(), aborting, jobTokensRunning); 2855 2856 if (aborting || (jobTokensRunning >= maxJobs)) 2857 return FALSE; 2858 2859 count = read(tokenWaitJob.inPipe, &tok, 1); 2860 if (count == 0) 2861 Fatal("eof on job pipe!"); 2862 if (count < 0 && jobTokensRunning != 0) { 2863 if (errno != EAGAIN) { 2864 Fatal("job pipe read: %s", strerror(errno)); 2865 } 2866 if (DEBUG(JOB)) 2867 fprintf(debug_file, "(%d) blocked for token\n", getpid()); 2868 wantToken = 1; 2869 return FALSE; 2870 } 2871 2872 if (count == 1 && tok != '+') { 2873 /* make being abvorted - remove any other job tokens */ 2874 if (DEBUG(JOB)) 2875 fprintf(debug_file, "(%d) aborted by token %c\n", getpid(), tok); 2876 while (read(tokenWaitJob.inPipe, &tok1, 1) == 1) 2877 continue; 2878 /* And put the stopper back */ 2879 write(tokenWaitJob.outPipe, &tok, 1); 2880 Fatal("A failure has been detected in another branch of the parallel make"); 2881 } 2882 2883 if (count == 1 && jobTokensRunning == 0) 2884 /* We didn't want the token really */ 2885 write(tokenWaitJob.outPipe, &tok, 1); 2886 2887 jobTokensRunning++; 2888 if (DEBUG(JOB)) 2889 fprintf(debug_file, "(%d) withdrew token\n", getpid()); 2890 return TRUE; 2891 } 2892 2893 #ifdef USE_SELECT 2894 int 2895 emul_poll(struct pollfd *fd, int nfd, int timeout) 2896 { 2897 fd_set rfds, wfds; 2898 int i, maxfd, nselect, npoll; 2899 struct timeval tv, *tvp; 2900 long usecs; 2901 2902 FD_ZERO(&rfds); 2903 FD_ZERO(&wfds); 2904 2905 maxfd = -1; 2906 for (i = 0; i < nfd; i++) { 2907 fd[i].revents = 0; 2908 2909 if (fd[i].events & POLLIN) 2910 FD_SET(fd[i].fd, &rfds); 2911 2912 if (fd[i].events & POLLOUT) 2913 FD_SET(fd[i].fd, &wfds); 2914 2915 if (fd[i].fd > maxfd) 2916 maxfd = fd[i].fd; 2917 } 2918 2919 if (maxfd >= FD_SETSIZE) { 2920 Punt("Ran out of fd_set slots; " 2921 "recompile with a larger FD_SETSIZE."); 2922 } 2923 2924 if (timeout < 0) { 2925 tvp = NULL; 2926 } else { 2927 usecs = timeout * 1000; 2928 tv.tv_sec = usecs / 1000000; 2929 tv.tv_usec = usecs % 1000000; 2930 tvp = &tv; 2931 } 2932 2933 nselect = select(maxfd + 1, &rfds, &wfds, 0, tvp); 2934 2935 if (nselect <= 0) 2936 return nselect; 2937 2938 npoll = 0; 2939 for (i = 0; i < nfd; i++) { 2940 if (FD_ISSET(fd[i].fd, &rfds)) 2941 fd[i].revents |= POLLIN; 2942 2943 if (FD_ISSET(fd[i].fd, &wfds)) 2944 fd[i].revents |= POLLOUT; 2945 2946 if (fd[i].revents) 2947 npoll++; 2948 } 2949 2950 return npoll; 2951 } 2952 #endif /* USE_SELECT */ 2953