1 /* $NetBSD: job.c,v 1.143 2008/12/19 22:03:41 christos 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 1.143 2008/12/19 22:03:41 christos 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 1.143 2008/12/19 22:03:41 christos 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); 348 static int JobPrintCommand(ClientData, ClientData); 349 static int JobSaveCommand(ClientData, ClientData); 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) 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)) 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(ClientData cmdp, ClientData 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 errOff = TRUE; 717 break; 718 case '+': 719 if (noSpecials) { 720 /* 721 * We're not actually executing anything... 722 * but this one needs to be - use compat mode just for it. 723 */ 724 CompatRunCommand(cmdp, job->node); 725 return 0; 726 } 727 break; 728 } 729 cmd++; 730 } 731 732 while (isspace((unsigned char) *cmd)) 733 cmd++; 734 735 /* 736 * If the shell doesn't have error control the alternate echo'ing will 737 * be done (to avoid showing additional error checking code) 738 * and this will need the characters '$ ` \ "' escaped 739 */ 740 741 if (!commandShell->hasErrCtl) { 742 /* Worst that could happen is every char needs escaping. */ 743 escCmd = bmake_malloc((strlen(cmd) * 2) + 1); 744 for (i = 0, j= 0; cmd[i] != '\0'; i++, j++) { 745 if (cmd[i] == '$' || cmd[i] == '`' || cmd[i] == '\\' || 746 cmd[i] == '"') 747 escCmd[j++] = '\\'; 748 escCmd[j] = cmd[i]; 749 } 750 escCmd[j] = 0; 751 } 752 753 if (shutUp) { 754 if (!(job->flags & JOB_SILENT) && !noSpecials && 755 commandShell->hasEchoCtl) { 756 DBPRINTF("%s\n", commandShell->echoOff); 757 } else { 758 if (commandShell->hasErrCtl) 759 shutUp = FALSE; 760 } 761 } 762 763 if (errOff) { 764 if ( !(job->flags & JOB_IGNERR) && !noSpecials) { 765 if (commandShell->hasErrCtl) { 766 /* 767 * we don't want the error-control commands showing 768 * up either, so we turn off echoing while executing 769 * them. We could put another field in the shell 770 * structure to tell JobDoOutput to look for this 771 * string too, but why make it any more complex than 772 * it already is? 773 */ 774 if (!(job->flags & JOB_SILENT) && !shutUp && 775 commandShell->hasEchoCtl) { 776 DBPRINTF("%s\n", commandShell->echoOff); 777 DBPRINTF("%s\n", commandShell->ignErr); 778 DBPRINTF("%s\n", commandShell->echoOn); 779 } else { 780 DBPRINTF("%s\n", commandShell->ignErr); 781 } 782 } else if (commandShell->ignErr && 783 (*commandShell->ignErr != '\0')) 784 { 785 /* 786 * The shell has no error control, so we need to be 787 * weird to get it to ignore any errors from the command. 788 * If echoing is turned on, we turn it off and use the 789 * errCheck template to echo the command. Leave echoing 790 * off so the user doesn't see the weirdness we go through 791 * to ignore errors. Set cmdTemplate to use the weirdness 792 * instead of the simple "%s\n" template. 793 */ 794 if (!(job->flags & JOB_SILENT) && !shutUp) { 795 if (commandShell->hasEchoCtl) { 796 DBPRINTF("%s\n", commandShell->echoOff); 797 } 798 DBPRINTF(commandShell->errCheck, escCmd); 799 shutUp = TRUE; 800 } else { 801 if (!shutUp) { 802 DBPRINTF(commandShell->errCheck, escCmd); 803 } 804 } 805 cmdTemplate = commandShell->ignErr; 806 /* 807 * The error ignoration (hee hee) is already taken care 808 * of by the ignErr template, so pretend error checking 809 * is still on. 810 */ 811 errOff = FALSE; 812 } else { 813 errOff = FALSE; 814 } 815 } else { 816 errOff = FALSE; 817 } 818 } else { 819 820 /* 821 * If errors are being checked and the shell doesn't have error control 822 * but does supply an errOut template, then setup commands to run 823 * through it. 824 */ 825 826 if (!commandShell->hasErrCtl && commandShell->errOut && 827 (*commandShell->errOut != '\0')) { 828 if (!(job->flags & JOB_SILENT) && !shutUp) { 829 if (commandShell->hasEchoCtl) { 830 DBPRINTF("%s\n", commandShell->echoOff); 831 } 832 DBPRINTF(commandShell->errCheck, escCmd); 833 shutUp = TRUE; 834 } 835 /* If it's a comment line or blank, treat as an ignored error */ 836 if ((escCmd[0] == commandShell->commentChar) || 837 (escCmd[0] == 0)) 838 cmdTemplate = commandShell->ignErr; 839 else 840 cmdTemplate = commandShell->errOut; 841 errOff = FALSE; 842 } 843 } 844 845 if (DEBUG(SHELL) && strcmp(shellName, "sh") == 0 && 846 (job->flags & JOB_TRACED) == 0) { 847 DBPRINTF("set -%s\n", "x"); 848 job->flags |= JOB_TRACED; 849 } 850 851 if ((cp = Check_Cwd_Cmd(cmd)) != NULL) { 852 DBPRINTF("test -d %s && ", cp); 853 DBPRINTF("cd %s\n", cp); 854 } 855 856 DBPRINTF(cmdTemplate, cmd); 857 free(cmdStart); 858 if (escCmd) 859 free(escCmd); 860 if (errOff) { 861 /* 862 * If echoing is already off, there's no point in issuing the 863 * echoOff command. Otherwise we issue it and pretend it was on 864 * for the whole command... 865 */ 866 if (!shutUp && !(job->flags & JOB_SILENT) && commandShell->hasEchoCtl){ 867 DBPRINTF("%s\n", commandShell->echoOff); 868 shutUp = TRUE; 869 } 870 DBPRINTF("%s\n", commandShell->errCheck); 871 } 872 if (shutUp && commandShell->hasEchoCtl) { 873 DBPRINTF("%s\n", commandShell->echoOn); 874 } 875 if (cp != NULL) { 876 DBPRINTF("test -d %s && ", cp); 877 DBPRINTF("cd %s\n", Var_Value(".OBJDIR", VAR_GLOBAL, &tmp)); 878 } 879 return 0; 880 } 881 882 /*- 883 *----------------------------------------------------------------------- 884 * JobSaveCommand -- 885 * Save a command to be executed when everything else is done. 886 * Callback function for JobFinish... 887 * 888 * Results: 889 * Always returns 0 890 * 891 * Side Effects: 892 * The command is tacked onto the end of postCommands's commands list. 893 * 894 *----------------------------------------------------------------------- 895 */ 896 static int 897 JobSaveCommand(ClientData cmd, ClientData gn) 898 { 899 cmd = Var_Subst(NULL, (char *)cmd, (GNode *)gn, FALSE); 900 (void)Lst_AtEnd(postCommands->commands, cmd); 901 return(0); 902 } 903 904 905 /*- 906 *----------------------------------------------------------------------- 907 * JobClose -- 908 * Called to close both input and output pipes when a job is finished. 909 * 910 * Results: 911 * Nada 912 * 913 * Side Effects: 914 * The file descriptors associated with the job are closed. 915 * 916 *----------------------------------------------------------------------- 917 */ 918 static void 919 JobClose(Job *job) 920 { 921 clearfd(job); 922 (void)close(job->outPipe); 923 job->outPipe = -1; 924 925 JobDoOutput(job, TRUE); 926 (void)close(job->inPipe); 927 job->inPipe = -1; 928 } 929 930 /*- 931 *----------------------------------------------------------------------- 932 * JobFinish -- 933 * Do final processing for the given job including updating 934 * parents and starting new jobs as available/necessary. Note 935 * that we pay no attention to the JOB_IGNERR flag here. 936 * This is because when we're called because of a noexecute flag 937 * or something, jstat.w_status is 0 and when called from 938 * Job_CatchChildren, the status is zeroed if it s/b ignored. 939 * 940 * Input: 941 * job job to finish 942 * status sub-why job went away 943 * 944 * Results: 945 * None 946 * 947 * Side Effects: 948 * Final commands for the job are placed on postCommands. 949 * 950 * If we got an error and are aborting (aborting == ABORT_ERROR) and 951 * the job list is now empty, we are done for the day. 952 * If we recognized an error (errors !=0), we set the aborting flag 953 * to ABORT_ERROR so no more jobs will be started. 954 *----------------------------------------------------------------------- 955 */ 956 /*ARGSUSED*/ 957 static void 958 JobFinish(Job *job, int status) 959 { 960 Boolean done, return_job_token; 961 962 if (DEBUG(JOB)) { 963 fprintf(debug_file, "Jobfinish: %d [%s], status %d\n", 964 job->pid, job->node->name, status); 965 } 966 967 if ((WIFEXITED(status) && 968 (((WEXITSTATUS(status) != 0) && !(job->flags & JOB_IGNERR)))) || 969 WIFSIGNALED(status)) 970 { 971 /* 972 * If it exited non-zero and either we're doing things our 973 * way or we're not ignoring errors, the job is finished. 974 * Similarly, if the shell died because of a signal 975 * the job is also finished. In these 976 * cases, finish out the job's output before printing the exit 977 * status... 978 */ 979 JobClose(job); 980 if (job->cmdFILE != NULL && job->cmdFILE != stdout) { 981 (void)fclose(job->cmdFILE); 982 job->cmdFILE = NULL; 983 } 984 done = TRUE; 985 } else if (WIFEXITED(status)) { 986 /* 987 * Deal with ignored errors in -B mode. We need to print a message 988 * telling of the ignored error as well as setting status.w_status 989 * to 0 so the next command gets run. To do this, we set done to be 990 * TRUE if in -B mode and the job exited non-zero. 991 */ 992 done = WEXITSTATUS(status) != 0; 993 /* 994 * Old comment said: "Note we don't 995 * want to close down any of the streams until we know we're at the 996 * end." 997 * But we do. Otherwise when are we going to print the rest of the 998 * stuff? 999 */ 1000 JobClose(job); 1001 } else { 1002 /* 1003 * No need to close things down or anything. 1004 */ 1005 done = FALSE; 1006 } 1007 1008 if (done) { 1009 if (WIFEXITED(status)) { 1010 if (DEBUG(JOB)) { 1011 (void)fprintf(debug_file, "Process %d [%s] exited.\n", 1012 job->pid, job->node->name); 1013 } 1014 if (WEXITSTATUS(status) != 0) { 1015 if (job->node != lastNode) { 1016 MESSAGE(stdout, job->node); 1017 lastNode = job->node; 1018 } 1019 (void)printf("*** [%s] Error code %d%s\n", 1020 job->node->name, 1021 WEXITSTATUS(status), 1022 (job->flags & JOB_IGNERR) ? "(ignored)" : ""); 1023 if (job->flags & JOB_IGNERR) 1024 status = 0; 1025 } else if (DEBUG(JOB)) { 1026 if (job->node != lastNode) { 1027 MESSAGE(stdout, job->node); 1028 lastNode = job->node; 1029 } 1030 (void)printf("*** [%s] Completed successfully\n", 1031 job->node->name); 1032 } 1033 } else { 1034 if (job->node != lastNode) { 1035 MESSAGE(stdout, job->node); 1036 lastNode = job->node; 1037 } 1038 (void)printf("*** [%s] Signal %d\n", 1039 job->node->name, WTERMSIG(status)); 1040 } 1041 (void)fflush(stdout); 1042 } 1043 1044 return_job_token = FALSE; 1045 1046 Trace_Log(JOBEND, job); 1047 if (!(job->flags & JOB_SPECIAL)) { 1048 if ((status != 0) || 1049 (aborting == ABORT_ERROR) || 1050 (aborting == ABORT_INTERRUPT)) 1051 return_job_token = TRUE; 1052 } 1053 1054 if ((aborting != ABORT_ERROR) && (aborting != ABORT_INTERRUPT) && (status == 0)) { 1055 /* 1056 * As long as we aren't aborting and the job didn't return a non-zero 1057 * status that we shouldn't ignore, we call Make_Update to update 1058 * the parents. In addition, any saved commands for the node are placed 1059 * on the .END target. 1060 */ 1061 if (job->tailCmds != NULL) { 1062 Lst_ForEachFrom(job->node->commands, job->tailCmds, 1063 JobSaveCommand, 1064 job->node); 1065 } 1066 job->node->made = MADE; 1067 if (!(job->flags & JOB_SPECIAL)) 1068 return_job_token = TRUE; 1069 Make_Update(job->node); 1070 job->job_state = JOB_ST_FREE; 1071 } else if (status != 0) { 1072 errors += 1; 1073 job->job_state = JOB_ST_FREE; 1074 } 1075 1076 /* 1077 * Set aborting if any error. 1078 */ 1079 if (errors && !keepgoing && (aborting != ABORT_INTERRUPT)) { 1080 /* 1081 * If we found any errors in this batch of children and the -k flag 1082 * wasn't given, we set the aborting flag so no more jobs get 1083 * started. 1084 */ 1085 aborting = ABORT_ERROR; 1086 } 1087 1088 if (return_job_token) 1089 Job_TokenReturn(); 1090 1091 if (aborting == ABORT_ERROR && jobTokensRunning == 0) { 1092 /* 1093 * If we are aborting and the job table is now empty, we finish. 1094 */ 1095 Finish(errors); 1096 } 1097 } 1098 1099 /*- 1100 *----------------------------------------------------------------------- 1101 * Job_Touch -- 1102 * Touch the given target. Called by JobStart when the -t flag was 1103 * given 1104 * 1105 * Input: 1106 * gn the node of the file to touch 1107 * silent TRUE if should not print message 1108 * 1109 * Results: 1110 * None 1111 * 1112 * Side Effects: 1113 * The data modification of the file is changed. In addition, if the 1114 * file did not exist, it is created. 1115 *----------------------------------------------------------------------- 1116 */ 1117 void 1118 Job_Touch(GNode *gn, Boolean silent) 1119 { 1120 int streamID; /* ID of stream opened to do the touch */ 1121 struct utimbuf times; /* Times for utime() call */ 1122 1123 if (gn->type & (OP_JOIN|OP_USE|OP_USEBEFORE|OP_EXEC|OP_OPTIONAL|OP_PHONY)) { 1124 /* 1125 * .JOIN, .USE, .ZEROTIME and .OPTIONAL targets are "virtual" targets 1126 * and, as such, shouldn't really be created. 1127 */ 1128 return; 1129 } 1130 1131 if (!silent || NoExecute(gn)) { 1132 (void)fprintf(stdout, "touch %s\n", gn->name); 1133 (void)fflush(stdout); 1134 } 1135 1136 if (NoExecute(gn)) { 1137 return; 1138 } 1139 1140 if (gn->type & OP_ARCHV) { 1141 Arch_Touch(gn); 1142 } else if (gn->type & OP_LIB) { 1143 Arch_TouchLib(gn); 1144 } else { 1145 char *file = gn->path ? gn->path : gn->name; 1146 1147 times.actime = times.modtime = now; 1148 if (utime(file, ×) < 0){ 1149 streamID = open(file, O_RDWR | O_CREAT, 0666); 1150 1151 if (streamID >= 0) { 1152 char c; 1153 1154 /* 1155 * Read and write a byte to the file to change the 1156 * modification time, then close the file. 1157 */ 1158 if (read(streamID, &c, 1) == 1) { 1159 (void)lseek(streamID, (off_t)0, SEEK_SET); 1160 (void)write(streamID, &c, 1); 1161 } 1162 1163 (void)close(streamID); 1164 } else { 1165 (void)fprintf(stdout, "*** couldn't touch %s: %s", 1166 file, strerror(errno)); 1167 (void)fflush(stdout); 1168 } 1169 } 1170 } 1171 } 1172 1173 /*- 1174 *----------------------------------------------------------------------- 1175 * Job_CheckCommands -- 1176 * Make sure the given node has all the commands it needs. 1177 * 1178 * Input: 1179 * gn The target whose commands need verifying 1180 * abortProc Function to abort with message 1181 * 1182 * Results: 1183 * TRUE if the commands list is/was ok. 1184 * 1185 * Side Effects: 1186 * The node will have commands from the .DEFAULT rule added to it 1187 * if it needs them. 1188 *----------------------------------------------------------------------- 1189 */ 1190 Boolean 1191 Job_CheckCommands(GNode *gn, void (*abortProc)(const char *, ...)) 1192 { 1193 if (OP_NOP(gn->type) && Lst_IsEmpty(gn->commands) && 1194 ((gn->type & OP_LIB) == 0 || Lst_IsEmpty(gn->children))) { 1195 /* 1196 * No commands. Look for .DEFAULT rule from which we might infer 1197 * commands 1198 */ 1199 if ((DEFAULT != NULL) && !Lst_IsEmpty(DEFAULT->commands) && 1200 (gn->type & OP_SPECIAL) == 0) { 1201 char *p1; 1202 /* 1203 * Make only looks for a .DEFAULT if the node was never the 1204 * target of an operator, so that's what we do too. If 1205 * a .DEFAULT was given, we substitute its commands for gn's 1206 * commands and set the IMPSRC variable to be the target's name 1207 * The DEFAULT node acts like a transformation rule, in that 1208 * gn also inherits any attributes or sources attached to 1209 * .DEFAULT itself. 1210 */ 1211 Make_HandleUse(DEFAULT, gn); 1212 Var_Set(IMPSRC, Var_Value(TARGET, gn, &p1), gn, 0); 1213 if (p1) 1214 free(p1); 1215 } else if (Dir_MTime(gn) == 0 && (gn->type & OP_SPECIAL) == 0) { 1216 /* 1217 * The node wasn't the target of an operator we have no .DEFAULT 1218 * rule to go on and the target doesn't already exist. There's 1219 * nothing more we can do for this branch. If the -k flag wasn't 1220 * given, we stop in our tracks, otherwise we just don't update 1221 * this node's parents so they never get examined. 1222 */ 1223 static const char msg[] = ": don't know how to make"; 1224 1225 if (gn->flags & FROM_DEPEND) { 1226 fprintf(stdout, "%s: ignoring stale .depend for %s\n", 1227 progname, gn->name); 1228 return TRUE; 1229 } 1230 1231 if (gn->type & OP_OPTIONAL) { 1232 (void)fprintf(stdout, "%s%s %s(ignored)\n", progname, 1233 msg, gn->name); 1234 (void)fflush(stdout); 1235 } else if (keepgoing) { 1236 (void)fprintf(stdout, "%s%s %s(continuing)\n", progname, 1237 msg, gn->name); 1238 (void)fflush(stdout); 1239 return FALSE; 1240 } else { 1241 (*abortProc)("%s%s %s. Stop", progname, msg, gn->name); 1242 return FALSE; 1243 } 1244 } 1245 } 1246 return TRUE; 1247 } 1248 1249 /*- 1250 *----------------------------------------------------------------------- 1251 * JobExec -- 1252 * Execute the shell for the given job. Called from JobStart 1253 * 1254 * Input: 1255 * job Job to execute 1256 * 1257 * Results: 1258 * None. 1259 * 1260 * Side Effects: 1261 * A shell is executed, outputs is altered and the Job structure added 1262 * to the job table. 1263 * 1264 *----------------------------------------------------------------------- 1265 */ 1266 static void 1267 JobExec(Job *job, char **argv) 1268 { 1269 int cpid; /* ID of new child */ 1270 sigset_t mask; 1271 1272 job->flags &= ~JOB_TRACED; 1273 1274 if (DEBUG(JOB)) { 1275 int i; 1276 1277 (void)fprintf(debug_file, "Running %s %sly\n", job->node->name, "local"); 1278 (void)fprintf(debug_file, "\tCommand: "); 1279 for (i = 0; argv[i] != NULL; i++) { 1280 (void)fprintf(debug_file, "%s ", argv[i]); 1281 } 1282 (void)fprintf(debug_file, "\n"); 1283 } 1284 1285 /* 1286 * Some jobs produce no output and it's disconcerting to have 1287 * no feedback of their running (since they produce no output, the 1288 * banner with their name in it never appears). This is an attempt to 1289 * provide that feedback, even if nothing follows it. 1290 */ 1291 if ((lastNode != job->node) && !(job->flags & JOB_SILENT)) { 1292 MESSAGE(stdout, job->node); 1293 lastNode = job->node; 1294 } 1295 1296 /* No interruptions until this job is on the `jobs' list */ 1297 JobSigLock(&mask); 1298 1299 /* Pre-emptively mark job running, pid still zero though */ 1300 job->job_state = JOB_ST_RUNNING; 1301 1302 cpid = vfork(); 1303 if (cpid == -1) 1304 Punt("Cannot vfork: %s", strerror(errno)); 1305 1306 if (cpid == 0) { 1307 /* Child */ 1308 1309 /* 1310 * Reset all signal handlers; this is necessary because we also 1311 * need to unblock signals before we exec(2). 1312 */ 1313 JobSigReset(); 1314 1315 /* Now unblock signals */ 1316 sigemptyset(&mask); 1317 JobSigUnlock(&mask); 1318 1319 /* 1320 * Must duplicate the input stream down to the child's input and 1321 * reset it to the beginning (again). Since the stream was marked 1322 * close-on-exec, we must clear that bit in the new input. 1323 */ 1324 if (dup2(FILENO(job->cmdFILE), 0) == -1) { 1325 execError("dup2", "job->cmdFILE"); 1326 _exit(1); 1327 } 1328 (void)fcntl(0, F_SETFD, 0); 1329 (void)lseek(0, (off_t)0, SEEK_SET); 1330 1331 if (job->node->type & OP_MAKE) { 1332 /* 1333 * Pass job token pipe to submakes. 1334 */ 1335 fcntl(tokenWaitJob.inPipe, F_SETFD, 0); 1336 fcntl(tokenWaitJob.outPipe, F_SETFD, 0); 1337 } 1338 1339 /* 1340 * Set up the child's output to be routed through the pipe 1341 * we've created for it. 1342 */ 1343 if (dup2(job->outPipe, 1) == -1) { 1344 execError("dup2", "job->outPipe"); 1345 _exit(1); 1346 } 1347 /* 1348 * The output channels are marked close on exec. This bit was 1349 * duplicated by the dup2(on some systems), so we have to clear 1350 * it before routing the shell's error output to the same place as 1351 * its standard output. 1352 */ 1353 (void)fcntl(1, F_SETFD, 0); 1354 if (dup2(1, 2) == -1) { 1355 execError("dup2", "1, 2"); 1356 _exit(1); 1357 } 1358 1359 /* 1360 * We want to switch the child into a different process family so 1361 * we can kill it and all its descendants in one fell swoop, 1362 * by killing its process family, but not commit suicide. 1363 */ 1364 #if defined(SYSV) 1365 /* XXX: dsl - I'm sure this should be setpgrp()... */ 1366 (void)setsid(); 1367 #else 1368 (void)setpgid(0, getpid()); 1369 #endif 1370 1371 Var_ExportVars(); 1372 1373 (void)execv(shellPath, argv); 1374 execError("exec", shellPath); 1375 _exit(1); 1376 } 1377 1378 /* Parent, continuing after the child exec */ 1379 job->pid = cpid; 1380 1381 Trace_Log(JOBSTART, job); 1382 1383 /* 1384 * Set the current position in the buffer to the beginning 1385 * and mark another stream to watch in the outputs mask 1386 */ 1387 job->curPos = 0; 1388 1389 watchfd(job); 1390 1391 if (job->cmdFILE != NULL && job->cmdFILE != stdout) { 1392 (void)fclose(job->cmdFILE); 1393 job->cmdFILE = NULL; 1394 } 1395 1396 /* 1397 * Now the job is actually running, add it to the table. 1398 */ 1399 if (DEBUG(JOB)) { 1400 fprintf(debug_file, "JobExec(%s): pid %d added to jobs table\n", 1401 job->node->name, job->pid); 1402 job_table_dump("job started"); 1403 } 1404 JobSigUnlock(&mask); 1405 } 1406 1407 /*- 1408 *----------------------------------------------------------------------- 1409 * JobMakeArgv -- 1410 * Create the argv needed to execute the shell for a given job. 1411 * 1412 * 1413 * Results: 1414 * 1415 * Side Effects: 1416 * 1417 *----------------------------------------------------------------------- 1418 */ 1419 static void 1420 JobMakeArgv(Job *job, char **argv) 1421 { 1422 int argc; 1423 static char args[10]; /* For merged arguments */ 1424 1425 argv[0] = UNCONST(shellName); 1426 argc = 1; 1427 1428 if ((commandShell->exit && (*commandShell->exit != '-')) || 1429 (commandShell->echo && (*commandShell->echo != '-'))) 1430 { 1431 /* 1432 * At least one of the flags doesn't have a minus before it, so 1433 * merge them together. Have to do this because the *(&(@*#*&#$# 1434 * Bourne shell thinks its second argument is a file to source. 1435 * Grrrr. Note the ten-character limitation on the combined arguments. 1436 */ 1437 (void)snprintf(args, sizeof(args), "-%s%s", 1438 ((job->flags & JOB_IGNERR) ? "" : 1439 (commandShell->exit ? commandShell->exit : "")), 1440 ((job->flags & JOB_SILENT) ? "" : 1441 (commandShell->echo ? commandShell->echo : ""))); 1442 1443 if (args[1]) { 1444 argv[argc] = args; 1445 argc++; 1446 } 1447 } else { 1448 if (!(job->flags & JOB_IGNERR) && commandShell->exit) { 1449 argv[argc] = UNCONST(commandShell->exit); 1450 argc++; 1451 } 1452 if (!(job->flags & JOB_SILENT) && commandShell->echo) { 1453 argv[argc] = UNCONST(commandShell->echo); 1454 argc++; 1455 } 1456 } 1457 argv[argc] = NULL; 1458 } 1459 1460 /*- 1461 *----------------------------------------------------------------------- 1462 * JobStart -- 1463 * Start a target-creation process going for the target described 1464 * by the graph node gn. 1465 * 1466 * Input: 1467 * gn target to create 1468 * flags flags for the job to override normal ones. 1469 * e.g. JOB_SPECIAL or JOB_IGNDOTS 1470 * previous The previous Job structure for this node, if any. 1471 * 1472 * Results: 1473 * JOB_ERROR if there was an error in the commands, JOB_FINISHED 1474 * if there isn't actually anything left to do for the job and 1475 * JOB_RUNNING if the job has been started. 1476 * 1477 * Side Effects: 1478 * A new Job node is created and added to the list of running 1479 * jobs. PMake is forked and a child shell created. 1480 * 1481 * NB: I'm fairly sure that this code is never called with JOB_SPECIAL set 1482 * JOB_IGNDOTS is never set (dsl) 1483 * Also the return value is ignored by everyone. 1484 *----------------------------------------------------------------------- 1485 */ 1486 static int 1487 JobStart(GNode *gn, int flags) 1488 { 1489 Job *job; /* new job descriptor */ 1490 char *argv[10]; /* Argument vector to shell */ 1491 Boolean cmdsOK; /* true if the nodes commands were all right */ 1492 Boolean noExec; /* Set true if we decide not to run the job */ 1493 int tfd; /* File descriptor to the temp file */ 1494 1495 for (job = job_table; job < job_table_end; job++) { 1496 if (job->job_state == JOB_ST_FREE) 1497 break; 1498 } 1499 if (job >= job_table_end) 1500 Punt("JobStart no job slots vacant"); 1501 1502 memset(job, 0, sizeof *job); 1503 job->job_state = JOB_ST_SETUP; 1504 if (gn->type & OP_SPECIAL) 1505 flags |= JOB_SPECIAL; 1506 1507 job->node = gn; 1508 job->tailCmds = NULL; 1509 1510 /* 1511 * Set the initial value of the flags for this job based on the global 1512 * ones and the node's attributes... Any flags supplied by the caller 1513 * are also added to the field. 1514 */ 1515 job->flags = 0; 1516 if (Targ_Ignore(gn)) { 1517 job->flags |= JOB_IGNERR; 1518 } 1519 if (Targ_Silent(gn)) { 1520 job->flags |= JOB_SILENT; 1521 } 1522 job->flags |= flags; 1523 1524 /* 1525 * Check the commands now so any attributes from .DEFAULT have a chance 1526 * to migrate to the node 1527 */ 1528 cmdsOK = Job_CheckCommands(gn, Error); 1529 1530 job->inPollfd = NULL; 1531 /* 1532 * If the -n flag wasn't given, we open up OUR (not the child's) 1533 * temporary file to stuff commands in it. The thing is rd/wr so we don't 1534 * need to reopen it to feed it to the shell. If the -n flag *was* given, 1535 * we just set the file to be stdout. Cute, huh? 1536 */ 1537 if (((gn->type & OP_MAKE) && !(noRecursiveExecute)) || 1538 (!noExecute && !touchFlag)) { 1539 /* 1540 * tfile is the name of a file into which all shell commands are 1541 * put. It is used over by removing it before the child shell is 1542 * executed. The XXXXXX in the string are replaced by the pid of 1543 * the make process in a 6-character field with leading zeroes. 1544 */ 1545 char tfile[sizeof(TMPPAT)]; 1546 sigset_t mask; 1547 /* 1548 * We're serious here, but if the commands were bogus, we're 1549 * also dead... 1550 */ 1551 if (!cmdsOK) { 1552 DieHorribly(); 1553 } 1554 1555 JobSigLock(&mask); 1556 (void)strcpy(tfile, TMPPAT); 1557 if ((tfd = mkstemp(tfile)) == -1) 1558 Punt("Could not create temporary file %s", strerror(errno)); 1559 if (!DEBUG(SCRIPT)) 1560 (void)eunlink(tfile); 1561 JobSigUnlock(&mask); 1562 1563 job->cmdFILE = fdopen(tfd, "w+"); 1564 if (job->cmdFILE == NULL) { 1565 Punt("Could not fdopen %s", tfile); 1566 } 1567 (void)fcntl(FILENO(job->cmdFILE), F_SETFD, 1); 1568 /* 1569 * Send the commands to the command file, flush all its buffers then 1570 * rewind and remove the thing. 1571 */ 1572 noExec = FALSE; 1573 1574 /* 1575 * We can do all the commands at once. hooray for sanity 1576 */ 1577 numCommands = 0; 1578 Lst_ForEach(gn->commands, JobPrintCommand, job); 1579 1580 /* 1581 * If we didn't print out any commands to the shell script, 1582 * there's not much point in executing the shell, is there? 1583 */ 1584 if (numCommands == 0) { 1585 noExec = TRUE; 1586 } 1587 } else if (NoExecute(gn)) { 1588 /* 1589 * Not executing anything -- just print all the commands to stdout 1590 * in one fell swoop. This will still set up job->tailCmds correctly. 1591 */ 1592 if (lastNode != gn) { 1593 MESSAGE(stdout, gn); 1594 lastNode = gn; 1595 } 1596 job->cmdFILE = stdout; 1597 /* 1598 * Only print the commands if they're ok, but don't die if they're 1599 * not -- just let the user know they're bad and keep going. It 1600 * doesn't do any harm in this case and may do some good. 1601 */ 1602 if (cmdsOK) { 1603 Lst_ForEach(gn->commands, JobPrintCommand, job); 1604 } 1605 /* 1606 * Don't execute the shell, thank you. 1607 */ 1608 noExec = TRUE; 1609 } else { 1610 /* 1611 * Just touch the target and note that no shell should be executed. 1612 * Set cmdFILE to stdout to make life easier. Check the commands, too, 1613 * but don't die if they're no good -- it does no harm to keep working 1614 * up the graph. 1615 */ 1616 job->cmdFILE = stdout; 1617 Job_Touch(gn, job->flags&JOB_SILENT); 1618 noExec = TRUE; 1619 } 1620 /* Just in case it isn't already... */ 1621 (void)fflush(job->cmdFILE); 1622 1623 /* 1624 * If we're not supposed to execute a shell, don't. 1625 */ 1626 if (noExec) { 1627 if (!(job->flags & JOB_SPECIAL)) 1628 Job_TokenReturn(); 1629 /* 1630 * Unlink and close the command file if we opened one 1631 */ 1632 if (job->cmdFILE != stdout) { 1633 if (job->cmdFILE != NULL) { 1634 (void)fclose(job->cmdFILE); 1635 job->cmdFILE = NULL; 1636 } 1637 } 1638 1639 /* 1640 * We only want to work our way up the graph if we aren't here because 1641 * the commands for the job were no good. 1642 */ 1643 if (cmdsOK && aborting == 0) { 1644 if (job->tailCmds != NULL) { 1645 Lst_ForEachFrom(job->node->commands, job->tailCmds, 1646 JobSaveCommand, 1647 job->node); 1648 } 1649 job->node->made = MADE; 1650 Make_Update(job->node); 1651 } 1652 job->job_state = JOB_ST_FREE; 1653 return cmdsOK ? JOB_FINISHED : JOB_ERROR; 1654 } 1655 1656 /* 1657 * Set up the control arguments to the shell. This is based on the flags 1658 * set earlier for this job. 1659 */ 1660 JobMakeArgv(job, argv); 1661 1662 /* Create the pipe by which we'll get the shell's output. */ 1663 JobCreatePipe(job, 3); 1664 1665 JobExec(job, argv); 1666 return(JOB_RUNNING); 1667 } 1668 1669 static char * 1670 JobOutput(Job *job, char *cp, char *endp, int msg) 1671 { 1672 char *ecp; 1673 1674 if (commandShell->noPrint) { 1675 ecp = Str_FindSubstring(cp, commandShell->noPrint); 1676 while (ecp != NULL) { 1677 if (cp != ecp) { 1678 *ecp = '\0'; 1679 if (!beSilent && msg && job->node != lastNode) { 1680 MESSAGE(stdout, job->node); 1681 lastNode = job->node; 1682 } 1683 /* 1684 * The only way there wouldn't be a newline after 1685 * this line is if it were the last in the buffer. 1686 * however, since the non-printable comes after it, 1687 * there must be a newline, so we don't print one. 1688 */ 1689 (void)fprintf(stdout, "%s", cp); 1690 (void)fflush(stdout); 1691 } 1692 cp = ecp + commandShell->noPLen; 1693 if (cp != endp) { 1694 /* 1695 * Still more to print, look again after skipping 1696 * the whitespace following the non-printable 1697 * command.... 1698 */ 1699 cp++; 1700 while (*cp == ' ' || *cp == '\t' || *cp == '\n') { 1701 cp++; 1702 } 1703 ecp = Str_FindSubstring(cp, commandShell->noPrint); 1704 } else { 1705 return cp; 1706 } 1707 } 1708 } 1709 return cp; 1710 } 1711 1712 /*- 1713 *----------------------------------------------------------------------- 1714 * JobDoOutput -- 1715 * This function is called at different times depending on 1716 * whether the user has specified that output is to be collected 1717 * via pipes or temporary files. In the former case, we are called 1718 * whenever there is something to read on the pipe. We collect more 1719 * output from the given job and store it in the job's outBuf. If 1720 * this makes up a line, we print it tagged by the job's identifier, 1721 * as necessary. 1722 * If output has been collected in a temporary file, we open the 1723 * file and read it line by line, transfering it to our own 1724 * output channel until the file is empty. At which point we 1725 * remove the temporary file. 1726 * In both cases, however, we keep our figurative eye out for the 1727 * 'noPrint' line for the shell from which the output came. If 1728 * we recognize a line, we don't print it. If the command is not 1729 * alone on the line (the character after it is not \0 or \n), we 1730 * do print whatever follows it. 1731 * 1732 * Input: 1733 * job the job whose output needs printing 1734 * finish TRUE if this is the last time we'll be called 1735 * for this job 1736 * 1737 * Results: 1738 * None 1739 * 1740 * Side Effects: 1741 * curPos may be shifted as may the contents of outBuf. 1742 *----------------------------------------------------------------------- 1743 */ 1744 STATIC void 1745 JobDoOutput(Job *job, Boolean finish) 1746 { 1747 Boolean gotNL = FALSE; /* true if got a newline */ 1748 Boolean fbuf; /* true if our buffer filled up */ 1749 int nr; /* number of bytes read */ 1750 int i; /* auxiliary index into outBuf */ 1751 int max; /* limit for i (end of current data) */ 1752 int nRead; /* (Temporary) number of bytes read */ 1753 1754 /* 1755 * Read as many bytes as will fit in the buffer. 1756 */ 1757 end_loop: 1758 gotNL = FALSE; 1759 fbuf = FALSE; 1760 1761 nRead = read(job->inPipe, &job->outBuf[job->curPos], 1762 JOB_BUFSIZE - job->curPos); 1763 if (nRead < 0) { 1764 if (errno == EAGAIN) 1765 return; 1766 if (DEBUG(JOB)) { 1767 perror("JobDoOutput(piperead)"); 1768 } 1769 nr = 0; 1770 } else { 1771 nr = nRead; 1772 } 1773 1774 /* 1775 * If we hit the end-of-file (the job is dead), we must flush its 1776 * remaining output, so pretend we read a newline if there's any 1777 * output remaining in the buffer. 1778 * Also clear the 'finish' flag so we stop looping. 1779 */ 1780 if ((nr == 0) && (job->curPos != 0)) { 1781 job->outBuf[job->curPos] = '\n'; 1782 nr = 1; 1783 finish = FALSE; 1784 } else if (nr == 0) { 1785 finish = FALSE; 1786 } 1787 1788 /* 1789 * Look for the last newline in the bytes we just got. If there is 1790 * one, break out of the loop with 'i' as its index and gotNL set 1791 * TRUE. 1792 */ 1793 max = job->curPos + nr; 1794 for (i = job->curPos + nr - 1; i >= job->curPos; i--) { 1795 if (job->outBuf[i] == '\n') { 1796 gotNL = TRUE; 1797 break; 1798 } else if (job->outBuf[i] == '\0') { 1799 /* 1800 * Why? 1801 */ 1802 job->outBuf[i] = ' '; 1803 } 1804 } 1805 1806 if (!gotNL) { 1807 job->curPos += nr; 1808 if (job->curPos == JOB_BUFSIZE) { 1809 /* 1810 * If we've run out of buffer space, we have no choice 1811 * but to print the stuff. sigh. 1812 */ 1813 fbuf = TRUE; 1814 i = job->curPos; 1815 } 1816 } 1817 if (gotNL || fbuf) { 1818 /* 1819 * Need to send the output to the screen. Null terminate it 1820 * first, overwriting the newline character if there was one. 1821 * So long as the line isn't one we should filter (according 1822 * to the shell description), we print the line, preceded 1823 * by a target banner if this target isn't the same as the 1824 * one for which we last printed something. 1825 * The rest of the data in the buffer are then shifted down 1826 * to the start of the buffer and curPos is set accordingly. 1827 */ 1828 job->outBuf[i] = '\0'; 1829 if (i >= job->curPos) { 1830 char *cp; 1831 1832 cp = JobOutput(job, job->outBuf, &job->outBuf[i], FALSE); 1833 1834 /* 1835 * There's still more in that thar buffer. This time, though, 1836 * we know there's no newline at the end, so we add one of 1837 * our own free will. 1838 */ 1839 if (*cp != '\0') { 1840 if (!beSilent && job->node != lastNode) { 1841 MESSAGE(stdout, job->node); 1842 lastNode = job->node; 1843 } 1844 (void)fprintf(stdout, "%s%s", cp, gotNL ? "\n" : ""); 1845 (void)fflush(stdout); 1846 } 1847 } 1848 if (i < max - 1) { 1849 /* shift the remaining characters down */ 1850 (void)memcpy(job->outBuf, &job->outBuf[i + 1], max - (i + 1)); 1851 job->curPos = max - (i + 1); 1852 1853 } else { 1854 /* 1855 * We have written everything out, so we just start over 1856 * from the start of the buffer. No copying. No nothing. 1857 */ 1858 job->curPos = 0; 1859 } 1860 } 1861 if (finish) { 1862 /* 1863 * If the finish flag is true, we must loop until we hit 1864 * end-of-file on the pipe. This is guaranteed to happen 1865 * eventually since the other end of the pipe is now closed 1866 * (we closed it explicitly and the child has exited). When 1867 * we do get an EOF, finish will be set FALSE and we'll fall 1868 * through and out. 1869 */ 1870 goto end_loop; 1871 } 1872 } 1873 1874 static void 1875 JobRun(GNode *targ) 1876 { 1877 #ifdef notyet 1878 /* 1879 * Unfortunately it is too complicated to run .BEGIN, .END, 1880 * and .INTERRUPT job in the parallel job module. This has 1881 * the nice side effect that it avoids a lot of other problems. 1882 */ 1883 Lst lst = Lst_Init(FALSE); 1884 Lst_AtEnd(lst, targ); 1885 (void)Make_Run(lst); 1886 Lst_Destroy(lst, NULL); 1887 JobStart(targ, JOB_SPECIAL); 1888 while (jobTokensRunning) { 1889 Job_CatchOutput(); 1890 } 1891 #else 1892 Compat_Make(targ, targ); 1893 if (targ->made == ERROR) { 1894 PrintOnError("\n\nStop."); 1895 exit(1); 1896 } 1897 #endif 1898 } 1899 1900 /*- 1901 *----------------------------------------------------------------------- 1902 * Job_CatchChildren -- 1903 * Handle the exit of a child. Called from Make_Make. 1904 * 1905 * Input: 1906 * block TRUE if should block on the wait 1907 * 1908 * Results: 1909 * none. 1910 * 1911 * Side Effects: 1912 * The job descriptor is removed from the list of children. 1913 * 1914 * Notes: 1915 * We do waits, blocking or not, according to the wisdom of our 1916 * caller, until there are no more children to report. For each 1917 * job, call JobFinish to finish things off. 1918 * 1919 *----------------------------------------------------------------------- 1920 */ 1921 1922 void 1923 Job_CatchChildren(void) 1924 { 1925 int pid; /* pid of dead child */ 1926 Job *job; /* job descriptor for dead child */ 1927 int status; /* Exit/termination status */ 1928 1929 /* 1930 * Don't even bother if we know there's no one around. 1931 */ 1932 if (jobTokensRunning == 0) 1933 return; 1934 1935 while ((pid = waitpid((pid_t) -1, &status, WNOHANG | WUNTRACED)) > 0) { 1936 if (DEBUG(JOB)) { 1937 (void)fprintf(debug_file, "Process %d exited/stopped status %x.\n", pid, 1938 status); 1939 } 1940 1941 job = JobFindPid(pid, JOB_ST_RUNNING); 1942 if (job == NULL) { 1943 if (!lurking_children) 1944 Error("Child (%d) status %x not in table?", pid, status); 1945 continue; 1946 } 1947 if (WIFSTOPPED(status)) { 1948 if (DEBUG(JOB)) { 1949 (void)fprintf(debug_file, "Process %d (%s) stopped.\n", 1950 job->pid, job->node->name); 1951 } 1952 if (!make_suspended) { 1953 switch (WSTOPSIG(status)) { 1954 case SIGTSTP: 1955 (void)printf("*** [%s] Suspended\n", job->node->name); 1956 break; 1957 case SIGSTOP: 1958 (void)printf("*** [%s] Stopped\n", job->node->name); 1959 break; 1960 default: 1961 (void)printf("*** [%s] Stopped -- signal %d\n", 1962 job->node->name, WSTOPSIG(status)); 1963 } 1964 job->job_suspended = 1; 1965 } 1966 (void)fflush(stdout); 1967 continue; 1968 } 1969 1970 job->job_state = JOB_ST_FINISHED; 1971 job->exit_status = status; 1972 1973 JobFinish(job, status); 1974 } 1975 } 1976 1977 /*- 1978 *----------------------------------------------------------------------- 1979 * Job_CatchOutput -- 1980 * Catch the output from our children, if we're using 1981 * pipes do so. Otherwise just block time until we get a 1982 * signal(most likely a SIGCHLD) since there's no point in 1983 * just spinning when there's nothing to do and the reaping 1984 * of a child can wait for a while. 1985 * 1986 * Results: 1987 * None 1988 * 1989 * Side Effects: 1990 * Output is read from pipes if we're piping. 1991 * ----------------------------------------------------------------------- 1992 */ 1993 void 1994 Job_CatchOutput(void) 1995 { 1996 int nready; 1997 Job *job; 1998 int i; 1999 2000 (void)fflush(stdout); 2001 2002 /* The first fd in the list is the job token pipe */ 2003 nready = poll(fds + 1 - wantToken, nfds - 1 + wantToken, POLL_MSEC); 2004 2005 if (nready < 0 || readyfd(&childExitJob)) { 2006 char token = 0; 2007 nready -= 1; 2008 (void)read(childExitJob.inPipe, &token, 1); 2009 if (token == DO_JOB_RESUME[0]) 2010 /* Complete relay requested from our SIGCONT handler */ 2011 JobRestartJobs(); 2012 Job_CatchChildren(); 2013 } 2014 2015 if (nready <= 0) 2016 return; 2017 2018 if (wantToken && readyfd(&tokenWaitJob)) 2019 nready--; 2020 2021 for (i = 2; i < nfds; i++) { 2022 if (!fds[i].revents) 2023 continue; 2024 job = jobfds[i]; 2025 if (job->job_state != JOB_ST_RUNNING) 2026 continue; 2027 JobDoOutput(job, FALSE); 2028 } 2029 } 2030 2031 /*- 2032 *----------------------------------------------------------------------- 2033 * Job_Make -- 2034 * Start the creation of a target. Basically a front-end for 2035 * JobStart used by the Make module. 2036 * 2037 * Results: 2038 * None. 2039 * 2040 * Side Effects: 2041 * Another job is started. 2042 * 2043 *----------------------------------------------------------------------- 2044 */ 2045 void 2046 Job_Make(GNode *gn) 2047 { 2048 (void)JobStart(gn, 0); 2049 } 2050 2051 void 2052 Shell_Init(void) 2053 { 2054 if (shellPath == NULL) { 2055 /* 2056 * We are using the default shell, which may be an absolute 2057 * path if DEFSHELL_CUSTOM is defined. 2058 */ 2059 shellName = commandShell->name; 2060 #ifdef DEFSHELL_CUSTOM 2061 if (*shellName == '/') { 2062 shellPath = shellName; 2063 shellName = strrchr(shellPath, '/'); 2064 shellName++; 2065 } else 2066 #endif 2067 shellPath = str_concat(_PATH_DEFSHELLDIR, shellName, STR_ADDSLASH); 2068 } 2069 if (commandShell->exit == NULL) { 2070 commandShell->exit = ""; 2071 } 2072 if (commandShell->echo == NULL) { 2073 commandShell->echo = ""; 2074 } 2075 } 2076 2077 /*- 2078 * Returns the string literal that is used in the current command shell 2079 * to produce a newline character. 2080 */ 2081 const char * 2082 Shell_GetNewline(void) 2083 { 2084 2085 return commandShell->newline; 2086 } 2087 2088 void 2089 Job_SetPrefix(void) 2090 { 2091 2092 if (targPrefix) { 2093 free(targPrefix); 2094 } else if (!Var_Exists(MAKE_JOB_PREFIX, VAR_GLOBAL)) { 2095 Var_Set(MAKE_JOB_PREFIX, "---", VAR_GLOBAL, 0); 2096 } 2097 2098 targPrefix = Var_Subst(NULL, "${" MAKE_JOB_PREFIX "}", VAR_GLOBAL, 0); 2099 } 2100 2101 /*- 2102 *----------------------------------------------------------------------- 2103 * Job_Init -- 2104 * Initialize the process module 2105 * 2106 * Input: 2107 * 2108 * Results: 2109 * none 2110 * 2111 * Side Effects: 2112 * lists and counters are initialized 2113 *----------------------------------------------------------------------- 2114 */ 2115 void 2116 Job_Init(void) 2117 { 2118 GNode *begin; /* node for commands to do at the very start */ 2119 2120 /* Allocate space for all the job info */ 2121 job_table = bmake_malloc(maxJobs * sizeof *job_table); 2122 memset(job_table, 0, maxJobs * sizeof *job_table); 2123 job_table_end = job_table + maxJobs; 2124 wantToken = 0; 2125 2126 aborting = 0; 2127 errors = 0; 2128 2129 lastNode = NULL; 2130 2131 if (maxJobs == 1) { 2132 /* 2133 * If only one job can run at a time, there's no need for a banner, 2134 * is there? 2135 */ 2136 targFmt = ""; 2137 } else { 2138 targFmt = TARG_FMT; 2139 } 2140 2141 /* 2142 * There is a non-zero chance that we already have children. 2143 * eg after 'make -f- <<EOF' 2144 * Since their termination causes a 'Child (pid) not in table' message, 2145 * Collect the status of any that are already dead, and suppress the 2146 * error message if there are any undead ones. 2147 */ 2148 for (;;) { 2149 int rval, status; 2150 rval = waitpid((pid_t) -1, &status, WNOHANG); 2151 if (rval > 0) 2152 continue; 2153 if (rval == 0) 2154 lurking_children = 1; 2155 break; 2156 } 2157 2158 Shell_Init(); 2159 2160 JobCreatePipe(&childExitJob, 3); 2161 2162 /* We can only need to wait for tokens, children and output from each job */ 2163 fds = bmake_malloc(sizeof (*fds) * (2 + maxJobs)); 2164 jobfds = bmake_malloc(sizeof (*jobfds) * (2 + maxJobs)); 2165 2166 /* These are permanent entries and take slots 0 and 1 */ 2167 watchfd(&tokenWaitJob); 2168 watchfd(&childExitJob); 2169 2170 sigemptyset(&caught_signals); 2171 /* 2172 * Install a SIGCHLD handler. 2173 */ 2174 (void)signal(SIGCHLD, JobChildSig); 2175 sigaddset(&caught_signals, SIGCHLD); 2176 2177 #define ADDSIG(s,h) \ 2178 if (signal(s, SIG_IGN) != SIG_IGN) { \ 2179 sigaddset(&caught_signals, s); \ 2180 (void)signal(s, h); \ 2181 } 2182 2183 /* 2184 * Catch the four signals that POSIX specifies if they aren't ignored. 2185 * JobPassSig will take care of calling JobInterrupt if appropriate. 2186 */ 2187 ADDSIG(SIGINT, JobPassSig_int) 2188 ADDSIG(SIGHUP, JobPassSig_term) 2189 ADDSIG(SIGTERM, JobPassSig_term) 2190 ADDSIG(SIGQUIT, JobPassSig_term) 2191 2192 /* 2193 * There are additional signals that need to be caught and passed if 2194 * either the export system wants to be told directly of signals or if 2195 * we're giving each job its own process group (since then it won't get 2196 * signals from the terminal driver as we own the terminal) 2197 */ 2198 ADDSIG(SIGTSTP, JobPassSig_suspend) 2199 ADDSIG(SIGTTOU, JobPassSig_suspend) 2200 ADDSIG(SIGTTIN, JobPassSig_suspend) 2201 ADDSIG(SIGWINCH, JobCondPassSig) 2202 ADDSIG(SIGCONT, JobContinueSig) 2203 #undef ADDSIG 2204 2205 begin = Targ_FindNode(".BEGIN", TARG_NOCREATE); 2206 2207 if (begin != NULL) { 2208 JobRun(begin); 2209 if (begin->made == ERROR) { 2210 PrintOnError("\n\nStop."); 2211 exit(1); 2212 } 2213 } 2214 postCommands = Targ_FindNode(".END", TARG_CREATE); 2215 } 2216 2217 static void JobSigReset(void) 2218 { 2219 #define DELSIG(s) \ 2220 if (sigismember(&caught_signals, s)) { \ 2221 (void)signal(s, SIG_DFL); \ 2222 } 2223 2224 DELSIG(SIGINT) 2225 DELSIG(SIGHUP) 2226 DELSIG(SIGQUIT) 2227 DELSIG(SIGTERM) 2228 DELSIG(SIGTSTP) 2229 DELSIG(SIGTTOU) 2230 DELSIG(SIGTTIN) 2231 DELSIG(SIGWINCH) 2232 DELSIG(SIGCONT) 2233 #undef DELSIG 2234 (void)signal(SIGCHLD, SIG_DFL); 2235 } 2236 2237 /*- 2238 *----------------------------------------------------------------------- 2239 * JobMatchShell -- 2240 * Find a shell in 'shells' given its name. 2241 * 2242 * Results: 2243 * A pointer to the Shell structure. 2244 * 2245 * Side Effects: 2246 * None. 2247 * 2248 *----------------------------------------------------------------------- 2249 */ 2250 static Shell * 2251 JobMatchShell(const char *name) 2252 { 2253 Shell *sh; 2254 2255 for (sh = shells; sh->name != NULL; sh++) { 2256 if (strcmp(name, sh->name) == 0) 2257 return (sh); 2258 } 2259 return NULL; 2260 } 2261 2262 /*- 2263 *----------------------------------------------------------------------- 2264 * Job_ParseShell -- 2265 * Parse a shell specification and set up commandShell, shellPath 2266 * and shellName appropriately. 2267 * 2268 * Input: 2269 * line The shell spec 2270 * 2271 * Results: 2272 * FAILURE if the specification was incorrect. 2273 * 2274 * Side Effects: 2275 * commandShell points to a Shell structure (either predefined or 2276 * created from the shell spec), shellPath is the full path of the 2277 * shell described by commandShell, while shellName is just the 2278 * final component of shellPath. 2279 * 2280 * Notes: 2281 * A shell specification consists of a .SHELL target, with dependency 2282 * operator, followed by a series of blank-separated words. Double 2283 * quotes can be used to use blanks in words. A backslash escapes 2284 * anything (most notably a double-quote and a space) and 2285 * provides the functionality it does in C. Each word consists of 2286 * keyword and value separated by an equal sign. There should be no 2287 * unnecessary spaces in the word. The keywords are as follows: 2288 * name Name of shell. 2289 * path Location of shell. 2290 * quiet Command to turn off echoing. 2291 * echo Command to turn echoing on 2292 * filter Result of turning off echoing that shouldn't be 2293 * printed. 2294 * echoFlag Flag to turn echoing on at the start 2295 * errFlag Flag to turn error checking on at the start 2296 * hasErrCtl True if shell has error checking control 2297 * newline String literal to represent a newline char 2298 * check Command to turn on error checking if hasErrCtl 2299 * is TRUE or template of command to echo a command 2300 * for which error checking is off if hasErrCtl is 2301 * FALSE. 2302 * ignore Command to turn off error checking if hasErrCtl 2303 * is TRUE or template of command to execute a 2304 * command so as to ignore any errors it returns if 2305 * hasErrCtl is FALSE. 2306 * 2307 *----------------------------------------------------------------------- 2308 */ 2309 ReturnStatus 2310 Job_ParseShell(char *line) 2311 { 2312 char **words; 2313 char **argv; 2314 int argc; 2315 char *path; 2316 Shell newShell; 2317 Boolean fullSpec = FALSE; 2318 Shell *sh; 2319 2320 while (isspace((unsigned char)*line)) { 2321 line++; 2322 } 2323 2324 if (shellArgv) 2325 free(UNCONST(shellArgv)); 2326 2327 memset(&newShell, 0, sizeof(newShell)); 2328 2329 /* 2330 * Parse the specification by keyword 2331 */ 2332 words = brk_string(line, &argc, TRUE, &path); 2333 if (words == NULL) { 2334 Error("Unterminated quoted string [%s]", line); 2335 return FAILURE; 2336 } 2337 shellArgv = path; 2338 2339 for (path = NULL, argv = words; argc != 0; argc--, argv++) { 2340 if (strncmp(*argv, "path=", 5) == 0) { 2341 path = &argv[0][5]; 2342 } else if (strncmp(*argv, "name=", 5) == 0) { 2343 newShell.name = &argv[0][5]; 2344 } else { 2345 if (strncmp(*argv, "quiet=", 6) == 0) { 2346 newShell.echoOff = &argv[0][6]; 2347 } else if (strncmp(*argv, "echo=", 5) == 0) { 2348 newShell.echoOn = &argv[0][5]; 2349 } else if (strncmp(*argv, "filter=", 7) == 0) { 2350 newShell.noPrint = &argv[0][7]; 2351 newShell.noPLen = strlen(newShell.noPrint); 2352 } else if (strncmp(*argv, "echoFlag=", 9) == 0) { 2353 newShell.echo = &argv[0][9]; 2354 } else if (strncmp(*argv, "errFlag=", 8) == 0) { 2355 newShell.exit = &argv[0][8]; 2356 } else if (strncmp(*argv, "hasErrCtl=", 10) == 0) { 2357 char c = argv[0][10]; 2358 newShell.hasErrCtl = !((c != 'Y') && (c != 'y') && 2359 (c != 'T') && (c != 't')); 2360 } else if (strncmp(*argv, "newline=", 8) == 0) { 2361 newShell.newline = &argv[0][8]; 2362 } else if (strncmp(*argv, "check=", 6) == 0) { 2363 newShell.errCheck = &argv[0][6]; 2364 } else if (strncmp(*argv, "ignore=", 7) == 0) { 2365 newShell.ignErr = &argv[0][7]; 2366 } else if (strncmp(*argv, "errout=", 7) == 0) { 2367 newShell.errOut = &argv[0][7]; 2368 } else if (strncmp(*argv, "comment=", 8) == 0) { 2369 newShell.commentChar = argv[0][8]; 2370 } else { 2371 Parse_Error(PARSE_FATAL, "Unknown keyword \"%s\"", 2372 *argv); 2373 free(words); 2374 return(FAILURE); 2375 } 2376 fullSpec = TRUE; 2377 } 2378 } 2379 2380 if (path == NULL) { 2381 /* 2382 * If no path was given, the user wants one of the pre-defined shells, 2383 * yes? So we find the one s/he wants with the help of JobMatchShell 2384 * and set things up the right way. shellPath will be set up by 2385 * Job_Init. 2386 */ 2387 if (newShell.name == NULL) { 2388 Parse_Error(PARSE_FATAL, "Neither path nor name specified"); 2389 free(words); 2390 return(FAILURE); 2391 } else { 2392 if ((sh = JobMatchShell(newShell.name)) == NULL) { 2393 Parse_Error(PARSE_WARNING, "%s: No matching shell", 2394 newShell.name); 2395 free(words); 2396 return(FAILURE); 2397 } 2398 commandShell = sh; 2399 shellName = newShell.name; 2400 } 2401 } else { 2402 /* 2403 * The user provided a path. If s/he gave nothing else (fullSpec is 2404 * FALSE), try and find a matching shell in the ones we know of. 2405 * Else we just take the specification at its word and copy it 2406 * to a new location. In either case, we need to record the 2407 * path the user gave for the shell. 2408 */ 2409 shellPath = path; 2410 path = strrchr(path, '/'); 2411 if (path == NULL) { 2412 path = UNCONST(shellPath); 2413 } else { 2414 path += 1; 2415 } 2416 if (newShell.name != NULL) { 2417 shellName = newShell.name; 2418 } else { 2419 shellName = path; 2420 } 2421 if (!fullSpec) { 2422 if ((sh = JobMatchShell(shellName)) == NULL) { 2423 Parse_Error(PARSE_WARNING, "%s: No matching shell", 2424 shellName); 2425 free(words); 2426 return(FAILURE); 2427 } 2428 commandShell = sh; 2429 } else { 2430 commandShell = bmake_malloc(sizeof(Shell)); 2431 *commandShell = newShell; 2432 } 2433 } 2434 2435 if (commandShell->echoOn && commandShell->echoOff) { 2436 commandShell->hasEchoCtl = TRUE; 2437 } 2438 2439 if (!commandShell->hasErrCtl) { 2440 if (commandShell->errCheck == NULL) { 2441 commandShell->errCheck = ""; 2442 } 2443 if (commandShell->ignErr == NULL) { 2444 commandShell->ignErr = "%s\n"; 2445 } 2446 } 2447 2448 /* 2449 * Do not free up the words themselves, since they might be in use by the 2450 * shell specification. 2451 */ 2452 free(words); 2453 return SUCCESS; 2454 } 2455 2456 /*- 2457 *----------------------------------------------------------------------- 2458 * JobInterrupt -- 2459 * Handle the receipt of an interrupt. 2460 * 2461 * Input: 2462 * runINTERRUPT Non-zero if commands for the .INTERRUPT target 2463 * should be executed 2464 * signo signal received 2465 * 2466 * Results: 2467 * None 2468 * 2469 * Side Effects: 2470 * All children are killed. Another job will be started if the 2471 * .INTERRUPT target was given. 2472 *----------------------------------------------------------------------- 2473 */ 2474 static void 2475 JobInterrupt(int runINTERRUPT, int signo) 2476 { 2477 Job *job; /* job descriptor in that element */ 2478 GNode *interrupt; /* the node describing the .INTERRUPT target */ 2479 sigset_t mask; 2480 GNode *gn; 2481 2482 aborting = ABORT_INTERRUPT; 2483 2484 JobSigLock(&mask); 2485 2486 for (job = job_table; job < job_table_end; job++) { 2487 if (job->job_state != JOB_ST_RUNNING) 2488 continue; 2489 2490 gn = job->node; 2491 2492 if ((gn->type & (OP_JOIN|OP_PHONY)) == 0 && !Targ_Precious(gn)) { 2493 char *file = (gn->path == NULL ? gn->name : gn->path); 2494 if (!noExecute && eunlink(file) != -1) { 2495 Error("*** %s removed", file); 2496 } 2497 } 2498 if (job->pid) { 2499 if (DEBUG(JOB)) { 2500 (void)fprintf(debug_file, 2501 "JobInterrupt passing signal %d to child %d.\n", 2502 signo, job->pid); 2503 } 2504 KILLPG(job->pid, signo); 2505 } 2506 } 2507 2508 JobSigUnlock(&mask); 2509 2510 if (runINTERRUPT && !touchFlag) { 2511 interrupt = Targ_FindNode(".INTERRUPT", TARG_NOCREATE); 2512 if (interrupt != NULL) { 2513 ignoreErrors = FALSE; 2514 JobRun(interrupt); 2515 } 2516 } 2517 Trace_Log(MAKEINTR, 0); 2518 exit(signo); 2519 } 2520 2521 /* 2522 *----------------------------------------------------------------------- 2523 * Job_Finish -- 2524 * Do final processing such as the running of the commands 2525 * attached to the .END target. 2526 * 2527 * Results: 2528 * Number of errors reported. 2529 * 2530 * Side Effects: 2531 * None. 2532 *----------------------------------------------------------------------- 2533 */ 2534 int 2535 Job_Finish(void) 2536 { 2537 if (postCommands != NULL && 2538 (!Lst_IsEmpty(postCommands->commands) || 2539 !Lst_IsEmpty(postCommands->children))) { 2540 if (errors) { 2541 Error("Errors reported so .END ignored"); 2542 } else { 2543 JobRun(postCommands); 2544 } 2545 } 2546 return(errors); 2547 } 2548 2549 /*- 2550 *----------------------------------------------------------------------- 2551 * Job_End -- 2552 * Cleanup any memory used by the jobs module 2553 * 2554 * Results: 2555 * None. 2556 * 2557 * Side Effects: 2558 * Memory is freed 2559 *----------------------------------------------------------------------- 2560 */ 2561 void 2562 Job_End(void) 2563 { 2564 #ifdef CLEANUP 2565 if (shellArgv) 2566 free(shellArgv); 2567 #endif 2568 } 2569 2570 /*- 2571 *----------------------------------------------------------------------- 2572 * Job_Wait -- 2573 * Waits for all running jobs to finish and returns. Sets 'aborting' 2574 * to ABORT_WAIT to prevent other jobs from starting. 2575 * 2576 * Results: 2577 * None. 2578 * 2579 * Side Effects: 2580 * Currently running jobs finish. 2581 * 2582 *----------------------------------------------------------------------- 2583 */ 2584 void 2585 Job_Wait(void) 2586 { 2587 aborting = ABORT_WAIT; 2588 while (jobTokensRunning != 0) { 2589 Job_CatchOutput(); 2590 } 2591 aborting = 0; 2592 } 2593 2594 /*- 2595 *----------------------------------------------------------------------- 2596 * Job_AbortAll -- 2597 * Abort all currently running jobs without handling output or anything. 2598 * This function is to be called only in the event of a major 2599 * error. Most definitely NOT to be called from JobInterrupt. 2600 * 2601 * Results: 2602 * None 2603 * 2604 * Side Effects: 2605 * All children are killed, not just the firstborn 2606 *----------------------------------------------------------------------- 2607 */ 2608 void 2609 Job_AbortAll(void) 2610 { 2611 Job *job; /* the job descriptor in that element */ 2612 int foo; 2613 2614 aborting = ABORT_ERROR; 2615 2616 if (jobTokensRunning) { 2617 for (job = job_table; job < job_table_end; job++) { 2618 if (job->job_state != JOB_ST_RUNNING) 2619 continue; 2620 /* 2621 * kill the child process with increasingly drastic signals to make 2622 * darn sure it's dead. 2623 */ 2624 KILLPG(job->pid, SIGINT); 2625 KILLPG(job->pid, SIGKILL); 2626 } 2627 } 2628 2629 /* 2630 * Catch as many children as want to report in at first, then give up 2631 */ 2632 while (waitpid((pid_t) -1, &foo, WNOHANG) > 0) 2633 continue; 2634 } 2635 2636 2637 /*- 2638 *----------------------------------------------------------------------- 2639 * JobRestartJobs -- 2640 * Tries to restart stopped jobs if there are slots available. 2641 * Called in process context in response to a SIGCONT. 2642 * 2643 * Results: 2644 * None. 2645 * 2646 * Side Effects: 2647 * Resumes jobs. 2648 * 2649 *----------------------------------------------------------------------- 2650 */ 2651 static void 2652 JobRestartJobs(void) 2653 { 2654 Job *job; 2655 2656 for (job = job_table; job < job_table_end; job++) { 2657 if (job->job_state == JOB_ST_RUNNING && 2658 (make_suspended || job->job_suspended)) { 2659 if (DEBUG(JOB)) { 2660 (void)fprintf(debug_file, "Restarting stopped job pid %d.\n", 2661 job->pid); 2662 } 2663 if (job->job_suspended) { 2664 (void)printf("*** [%s] Continued\n", job->node->name); 2665 (void)fflush(stdout); 2666 } 2667 job->job_suspended = 0; 2668 if (KILLPG(job->pid, SIGCONT) != 0 && DEBUG(JOB)) { 2669 fprintf(debug_file, "Failed to send SIGCONT to %d\n", job->pid); 2670 } 2671 } 2672 if (job->job_state == JOB_ST_FINISHED) 2673 /* Job exit deferred after calling waitpid() in a signal handler */ 2674 JobFinish(job, job->exit_status); 2675 } 2676 make_suspended = 0; 2677 } 2678 2679 static void 2680 watchfd(Job *job) 2681 { 2682 if (job->inPollfd != NULL) 2683 Punt("Watching watched job"); 2684 2685 fds[nfds].fd = job->inPipe; 2686 fds[nfds].events = POLLIN; 2687 jobfds[nfds] = job; 2688 job->inPollfd = &fds[nfds]; 2689 nfds++; 2690 } 2691 2692 static void 2693 clearfd(Job *job) 2694 { 2695 int i; 2696 if (job->inPollfd == NULL) 2697 Punt("Unwatching unwatched job"); 2698 i = job->inPollfd - fds; 2699 nfds--; 2700 /* 2701 * Move last job in table into hole made by dead job. 2702 */ 2703 if (nfds != i) { 2704 fds[i] = fds[nfds]; 2705 jobfds[i] = jobfds[nfds]; 2706 jobfds[i]->inPollfd = &fds[i]; 2707 } 2708 job->inPollfd = NULL; 2709 } 2710 2711 static int 2712 readyfd(Job *job) 2713 { 2714 if (job->inPollfd == NULL) 2715 Punt("Polling unwatched job"); 2716 return (job->inPollfd->revents & POLLIN) != 0; 2717 } 2718 2719 /*- 2720 *----------------------------------------------------------------------- 2721 * JobTokenAdd -- 2722 * Put a token into the job pipe so that some make process can start 2723 * another job. 2724 * 2725 * Side Effects: 2726 * Allows more build jobs to be spawned somewhere. 2727 * 2728 *----------------------------------------------------------------------- 2729 */ 2730 2731 static void 2732 JobTokenAdd(void) 2733 { 2734 char tok = JOB_TOKENS[aborting], tok1; 2735 2736 /* If we are depositing an error token flush everything else */ 2737 while (tok != '+' && read(tokenWaitJob.inPipe, &tok1, 1) == 1) 2738 continue; 2739 2740 if (DEBUG(JOB)) 2741 fprintf(debug_file, "(%d) aborting %d, deposit token %c\n", 2742 getpid(), aborting, JOB_TOKENS[aborting]); 2743 write(tokenWaitJob.outPipe, &tok, 1); 2744 } 2745 2746 /*- 2747 *----------------------------------------------------------------------- 2748 * Job_ServerStartTokenAdd -- 2749 * Prep the job token pipe in the root make process. 2750 * 2751 *----------------------------------------------------------------------- 2752 */ 2753 2754 void 2755 Job_ServerStart(int max_tokens, int jp_0, int jp_1) 2756 { 2757 int i; 2758 char jobarg[64]; 2759 2760 if (jp_0 >= 0 && jp_1 >= 0) { 2761 /* Pipe passed in from parent */ 2762 tokenWaitJob.inPipe = jp_0; 2763 tokenWaitJob.outPipe = jp_1; 2764 return; 2765 } 2766 2767 JobCreatePipe(&tokenWaitJob, 15); 2768 2769 snprintf(jobarg, sizeof(jobarg), "%d,%d", 2770 tokenWaitJob.inPipe, tokenWaitJob.outPipe); 2771 2772 Var_Append(MAKEFLAGS, "-J", VAR_GLOBAL); 2773 Var_Append(MAKEFLAGS, jobarg, VAR_GLOBAL); 2774 2775 /* 2776 * Preload the job pipe with one token per job, save the one 2777 * "extra" token for the primary job. 2778 * 2779 * XXX should clip maxJobs against PIPE_BUF -- if max_tokens is 2780 * larger than the write buffer size of the pipe, we will 2781 * deadlock here. 2782 */ 2783 for (i = 1; i < max_tokens; i++) 2784 JobTokenAdd(); 2785 } 2786 2787 /*- 2788 *----------------------------------------------------------------------- 2789 * Job_TokenReturn -- 2790 * Return a withdrawn token to the pool. 2791 * 2792 *----------------------------------------------------------------------- 2793 */ 2794 2795 void 2796 Job_TokenReturn(void) 2797 { 2798 jobTokensRunning--; 2799 if (jobTokensRunning < 0) 2800 Punt("token botch"); 2801 if (jobTokensRunning || JOB_TOKENS[aborting] != '+') 2802 JobTokenAdd(); 2803 } 2804 2805 /*- 2806 *----------------------------------------------------------------------- 2807 * Job_TokenWithdraw -- 2808 * Attempt to withdraw a token from the pool. 2809 * 2810 * Results: 2811 * Returns TRUE if a token was withdrawn, and FALSE if the pool 2812 * is currently empty. 2813 * 2814 * Side Effects: 2815 * If pool is empty, set wantToken so that we wake up 2816 * when a token is released. 2817 * 2818 *----------------------------------------------------------------------- 2819 */ 2820 2821 2822 Boolean 2823 Job_TokenWithdraw(void) 2824 { 2825 char tok, tok1; 2826 int count; 2827 2828 wantToken = 0; 2829 if (DEBUG(JOB)) 2830 fprintf(debug_file, "Job_TokenWithdraw(%d): aborting %d, running %d\n", 2831 getpid(), aborting, jobTokensRunning); 2832 2833 if (aborting || (jobTokensRunning >= maxJobs)) 2834 return FALSE; 2835 2836 count = read(tokenWaitJob.inPipe, &tok, 1); 2837 if (count == 0) 2838 Fatal("eof on job pipe!"); 2839 if (count < 0 && jobTokensRunning != 0) { 2840 if (errno != EAGAIN) { 2841 Fatal("job pipe read: %s", strerror(errno)); 2842 } 2843 if (DEBUG(JOB)) 2844 fprintf(debug_file, "(%d) blocked for token\n", getpid()); 2845 wantToken = 1; 2846 return FALSE; 2847 } 2848 2849 if (count == 1 && tok != '+') { 2850 /* make being abvorted - remove any other job tokens */ 2851 if (DEBUG(JOB)) 2852 fprintf(debug_file, "(%d) aborted by token %c\n", getpid(), tok); 2853 while (read(tokenWaitJob.inPipe, &tok1, 1) == 1) 2854 continue; 2855 /* And put the stopper back */ 2856 write(tokenWaitJob.outPipe, &tok, 1); 2857 Fatal("A failure has been detected in another branch of the parallel make"); 2858 } 2859 2860 if (count == 1 && jobTokensRunning == 0) 2861 /* We didn't want the token really */ 2862 write(tokenWaitJob.outPipe, &tok, 1); 2863 2864 jobTokensRunning++; 2865 if (DEBUG(JOB)) 2866 fprintf(debug_file, "(%d) withdrew token\n", getpid()); 2867 return TRUE; 2868 } 2869 2870 #ifdef USE_SELECT 2871 int 2872 emul_poll(struct pollfd *fd, int nfd, int timeout) 2873 { 2874 fd_set rfds, wfds; 2875 int i, maxfd, nselect, npoll; 2876 struct timeval tv, *tvp; 2877 long usecs; 2878 2879 FD_ZERO(&rfds); 2880 FD_ZERO(&wfds); 2881 2882 maxfd = -1; 2883 for (i = 0; i < nfd; i++) { 2884 fd[i].revents = 0; 2885 2886 if (fd[i].events & POLLIN) 2887 FD_SET(fd[i].fd, &rfds); 2888 2889 if (fd[i].events & POLLOUT) 2890 FD_SET(fd[i].fd, &wfds); 2891 2892 if (fd[i].fd > maxfd) 2893 maxfd = fd[i].fd; 2894 } 2895 2896 if (maxfd >= FD_SETSIZE) { 2897 Punt("Ran out of fd_set slots; " 2898 "recompile with a larger FD_SETSIZE."); 2899 } 2900 2901 if (timeout < 0) { 2902 tvp = NULL; 2903 } else { 2904 usecs = timeout * 1000; 2905 tv.tv_sec = usecs / 1000000; 2906 tv.tv_usec = usecs % 1000000; 2907 tvp = &tv; 2908 } 2909 2910 nselect = select(maxfd + 1, &rfds, &wfds, 0, tvp); 2911 2912 if (nselect <= 0) 2913 return nselect; 2914 2915 npoll = 0; 2916 for (i = 0; i < nfd; i++) { 2917 if (FD_ISSET(fd[i].fd, &rfds)) 2918 fd[i].revents |= POLLIN; 2919 2920 if (FD_ISSET(fd[i].fd, &wfds)) 2921 fd[i].revents |= POLLOUT; 2922 2923 if (fd[i].revents) 2924 npoll++; 2925 } 2926 2927 return npoll; 2928 } 2929 #endif /* USE_SELECT */ 2930