job.c revision 1.56
1 /* $NetBSD: job.c,v 1.56 2002/02/06 16:20:25 pk Exp $ */ 2 3 /* 4 * Copyright (c) 1988, 1989, 1990 The Regents of the University of California. 5 * Copyright (c) 1988, 1989 by Adam de Boor 6 * Copyright (c) 1989 by Berkeley Softworks 7 * All rights reserved. 8 * 9 * This code is derived from software contributed to Berkeley by 10 * Adam de Boor. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. All advertising materials mentioning features or use of this software 21 * must display the following acknowledgement: 22 * This product includes software developed by the University of 23 * California, Berkeley and its contributors. 24 * 4. Neither the name of the University nor the names of its contributors 25 * may be used to endorse or promote products derived from this software 26 * without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 * SUCH DAMAGE. 39 */ 40 41 #ifdef MAKE_BOOTSTRAP 42 static char rcsid[] = "$NetBSD: job.c,v 1.56 2002/02/06 16:20:25 pk Exp $"; 43 #else 44 #include <sys/cdefs.h> 45 #ifndef lint 46 #if 0 47 static char sccsid[] = "@(#)job.c 8.2 (Berkeley) 3/19/94"; 48 #else 49 __RCSID("$NetBSD: job.c,v 1.56 2002/02/06 16:20:25 pk Exp $"); 50 #endif 51 #endif /* not lint */ 52 #endif 53 54 /*- 55 * job.c -- 56 * handle the creation etc. of our child processes. 57 * 58 * Interface: 59 * Job_Make Start the creation of the given target. 60 * 61 * Job_CatchChildren Check for and handle the termination of any 62 * children. This must be called reasonably 63 * frequently to keep the whole make going at 64 * a decent clip, since job table entries aren't 65 * removed until their process is caught this way. 66 * Its single argument is TRUE if the function 67 * should block waiting for a child to terminate. 68 * 69 * Job_CatchOutput Print any output our children have produced. 70 * Should also be called fairly frequently to 71 * keep the user informed of what's going on. 72 * If no output is waiting, it will block for 73 * a time given by the SEL_* constants, below, 74 * or until output is ready. 75 * 76 * Job_Init Called to intialize this module. in addition, 77 * any commands attached to the .BEGIN target 78 * are executed before this function returns. 79 * Hence, the makefile must have been parsed 80 * before this function is called. 81 * 82 * Job_End Cleanup any memory used. 83 * 84 * Job_Empty Return TRUE if the job table is completely 85 * empty. 86 * 87 * Job_ParseShell Given the line following a .SHELL target, parse 88 * the line as a shell specification. Returns 89 * FAILURE if the spec was incorrect. 90 * 91 * Job_Finish Perform any final processing which needs doing. 92 * This includes the execution of any commands 93 * which have been/were attached to the .END 94 * target. It should only be called when the 95 * job table is empty. 96 * 97 * Job_AbortAll Abort all currently running jobs. It doesn't 98 * handle output or do anything for the jobs, 99 * just kills them. It should only be called in 100 * an emergency, as it were. 101 * 102 * Job_CheckCommands Verify that the commands for a target are 103 * ok. Provide them if necessary and possible. 104 * 105 * Job_Touch Update a target without really updating it. 106 * 107 * Job_Wait Wait for all currently-running jobs to finish. 108 */ 109 110 #include <sys/types.h> 111 #include <sys/stat.h> 112 #include <sys/file.h> 113 #include <sys/time.h> 114 #include <sys/wait.h> 115 #include <fcntl.h> 116 #include <errno.h> 117 #include <utime.h> 118 #include <stdio.h> 119 #include <string.h> 120 #include <signal.h> 121 #ifndef RMT_WILL_WATCH 122 #ifndef USE_SELECT 123 #include <poll.h> 124 #endif 125 #endif 126 #include "make.h" 127 #include "hash.h" 128 #include "dir.h" 129 #include "job.h" 130 #include "pathnames.h" 131 #include "trace.h" 132 #ifdef REMOTE 133 #include "rmt.h" 134 # define STATIC 135 #else 136 # define STATIC static 137 #endif 138 139 /* 140 * error handling variables 141 */ 142 static int errors = 0; /* number of errors reported */ 143 static int aborting = 0; /* why is the make aborting? */ 144 #define ABORT_ERROR 1 /* Because of an error */ 145 #define ABORT_INTERRUPT 2 /* Because it was interrupted */ 146 #define ABORT_WAIT 3 /* Waiting for jobs to finish */ 147 148 /* 149 * XXX: Avoid SunOS bug... FILENO() is fp->_file, and file 150 * is a char! So when we go above 127 we turn negative! 151 */ 152 #define FILENO(a) ((unsigned) fileno(a)) 153 154 /* 155 * post-make command processing. The node postCommands is really just the 156 * .END target but we keep it around to avoid having to search for it 157 * all the time. 158 */ 159 static GNode *postCommands; /* node containing commands to execute when 160 * everything else is done */ 161 static int numCommands; /* The number of commands actually printed 162 * for a target. Should this number be 163 * 0, no shell will be executed. */ 164 165 /* 166 * Return values from JobStart. 167 */ 168 #define JOB_RUNNING 0 /* Job is running */ 169 #define JOB_ERROR 1 /* Error in starting the job */ 170 #define JOB_FINISHED 2 /* The job is already finished */ 171 #define JOB_STOPPED 3 /* The job is stopped */ 172 173 174 175 /* 176 * Descriptions for various shells. 177 */ 178 static Shell shells[] = { 179 /* 180 * CSH description. The csh can do echo control by playing 181 * with the setting of the 'echo' shell variable. Sadly, 182 * however, it is unable to do error control nicely. 183 */ 184 { 185 "csh", 186 TRUE, "unset verbose", "set verbose", "unset verbose", 10, 187 FALSE, "echo \"%s\"\n", "csh -c \"%s || exit 0\"", 188 "v", "e", 189 }, 190 /* 191 * SH description. Echo control is also possible and, under 192 * sun UNIX anyway, one can even control error checking. 193 */ 194 { 195 "sh", 196 TRUE, "set -", "set -v", "set -", 5, 197 TRUE, "set -e", "set +e", 198 #ifdef OLDBOURNESHELL 199 FALSE, "echo \"%s\"\n", "sh -c '%s || exit 0'\n", 200 #endif 201 #ifdef __NetBSD__ 202 "vq", 203 #else 204 "v", 205 #endif 206 "e", 207 }, 208 /* 209 * UNKNOWN. 210 */ 211 { 212 (char *) 0, 213 FALSE, (char *) 0, (char *) 0, (char *) 0, 0, 214 FALSE, (char *) 0, (char *) 0, 215 (char *) 0, (char *) 0, 216 } 217 }; 218 static Shell *commandShell = &shells[DEFSHELL];/* this is the shell to 219 * which we pass all 220 * commands in the Makefile. 221 * It is set by the 222 * Job_ParseShell function */ 223 static char *shellPath = NULL, /* full pathname of 224 * executable image */ 225 *shellName = NULL, /* last component of shell */ 226 *shellArgv = NULL; /* Custom shell args */ 227 228 229 static int maxJobs; /* The most children we can run at once */ 230 static int maxLocal; /* The most local ones we can have */ 231 STATIC int nJobs; /* The number of children currently running */ 232 STATIC int nLocal; /* The number of local children */ 233 STATIC Lst jobs; /* The structures that describe them */ 234 static Boolean wantToken; /* we want a token */ 235 236 /* 237 * Set of descriptors of pipes connected to 238 * the output channels of children 239 */ 240 #ifndef RMT_WILL_WATCH 241 #ifdef USE_SELECT 242 static fd_set outputs; 243 #else 244 static struct pollfd *fds = NULL; 245 static Job **jobfds = NULL; 246 static int nfds = 0; 247 static int maxfds = 0; 248 static void watchfd __P((Job *)); 249 static void clearfd __P((Job *)); 250 static int readyfd __P((Job *)); 251 #define JBSTART 256 252 #define JBFACTOR 2 253 #endif 254 #endif 255 256 STATIC GNode *lastNode; /* The node for which output was most recently 257 * produced. */ 258 STATIC char *targFmt; /* Format string to use to head output from a 259 * job when it's not the most-recent job heard 260 * from */ 261 static Job tokenWaitJob; /* token wait pseudo-job */ 262 int job_pipe[2] = { -1, -1 }; /* job server pipes. */ 263 264 #ifdef REMOTE 265 # define TARG_FMT "--- %s at %s ---\n" /* Default format */ 266 # define MESSAGE(fp, gn) \ 267 (void) fprintf(fp, targFmt, gn->name, gn->rem.hname) 268 #else 269 # define TARG_FMT "--- %s ---\n" /* Default format */ 270 # define MESSAGE(fp, gn) \ 271 (void) fprintf(fp, targFmt, gn->name) 272 #endif 273 274 /* 275 * When JobStart attempts to run a job remotely but can't, and isn't allowed 276 * to run the job locally, or when Job_CatchChildren detects a job that has 277 * been migrated home, the job is placed on the stoppedJobs queue to be run 278 * when the next job finishes. 279 */ 280 STATIC Lst stoppedJobs; /* Lst of Job structures describing 281 * jobs that were stopped due to concurrency 282 * limits or migration home */ 283 284 285 #if defined(USE_PGRP) && defined(SYSV) 286 # define KILL(pid, sig) kill(-(pid), (sig)) 287 #else 288 # if defined(USE_PGRP) 289 # define KILL(pid, sig) killpg((pid), (sig)) 290 # else 291 # define KILL(pid, sig) kill((pid), (sig)) 292 # endif 293 #endif 294 295 /* 296 * Grmpf... There is no way to set bits of the wait structure 297 * anymore with the stupid W*() macros. I liked the union wait 298 * stuff much more. So, we devise our own macros... This is 299 * really ugly, use dramamine sparingly. You have been warned. 300 */ 301 #ifndef W_STOPCODE 302 #define W_STOPCODE(sig) (((sig) << 8) | 0177) 303 #endif 304 #ifndef W_EXITCODE 305 #define W_EXITCODE(ret, sig) ((ret << 8) | (sig)) 306 #endif 307 308 static int JobCondPassSig __P((ClientData, ClientData)); 309 static void JobPassSig __P((int)); 310 static void JobIgnoreSig __P((int)); 311 #ifdef USE_PGRP 312 static void JobContinueSig __P((int)); 313 #endif 314 static int JobCmpPid __P((ClientData, ClientData)); 315 static int JobPrintCommand __P((ClientData, ClientData)); 316 static int JobSaveCommand __P((ClientData, ClientData)); 317 static void JobClose __P((Job *)); 318 #ifdef REMOTE 319 static int JobCmpRmtID __P((Job *, int)); 320 # ifdef RMT_WILL_WATCH 321 static void JobLocalInput __P((int, Job *)); 322 # endif 323 #else 324 static void JobFinish __P((Job *, int *)); 325 static void JobExec __P((Job *, char **)); 326 #endif 327 static void JobMakeArgv __P((Job *, char **)); 328 static void JobRestart __P((Job *)); 329 static int JobStart __P((GNode *, int, Job *)); 330 static char *JobOutput __P((Job *, char *, char *, int)); 331 static void JobDoOutput __P((Job *, Boolean)); 332 static Shell *JobMatchShell __P((char *)); 333 static void JobInterrupt __P((int, int)); 334 static void JobRestartJobs __P((void)); 335 static void JobTokenAdd __P((void)); 336 337 /*- 338 *----------------------------------------------------------------------- 339 * JobCondPassSig -- 340 * Pass a signal to a job if the job is remote or if USE_PGRP 341 * is defined. 342 * 343 * Results: 344 * === 0 345 * 346 * Side Effects: 347 * None, except the job may bite it. 348 * 349 *----------------------------------------------------------------------- 350 */ 351 static int 352 JobCondPassSig(jobp, signop) 353 ClientData jobp; /* Job to biff */ 354 ClientData signop; /* Signal to send it */ 355 { 356 Job *job = (Job *) jobp; 357 int signo = *(int *) signop; 358 #ifdef RMT_WANTS_SIGNALS 359 if (job->flags & JOB_REMOTE) { 360 (void) Rmt_Signal(job, signo); 361 } else { 362 KILL(job->pid, signo); 363 } 364 #else 365 /* 366 * Assume that sending the signal to job->pid will signal any remote 367 * job as well. 368 */ 369 if (DEBUG(JOB)) { 370 (void) fprintf(stdout, 371 "JobCondPassSig passing signal %d to child %d.\n", 372 signo, job->pid); 373 (void) fflush(stdout); 374 } 375 KILL(job->pid, signo); 376 #endif 377 return 0; 378 } 379 380 /*- 381 *----------------------------------------------------------------------- 382 * JobIgnoreSig -- 383 * No-op signal handler so we wake up from poll. 384 * 385 * Results: 386 * None. 387 * 388 * Side Effects: 389 * None. 390 * 391 *----------------------------------------------------------------------- 392 */ 393 static void 394 JobIgnoreSig(signo) 395 int signo; /* The signal number we've received */ 396 { 397 /* 398 * Do nothing. The mere fact that we've been called will cause 399 * poll/select in Job_CatchOutput() to return early. 400 */ 401 } 402 403 404 #ifdef USE_PGRP 405 /*- 406 *----------------------------------------------------------------------- 407 * JobContinueSig -- 408 * Resume all stopped jobs. 409 * 410 * Results: 411 * None. 412 * 413 * Side Effects: 414 * Jobs start running again. 415 * 416 *----------------------------------------------------------------------- 417 */ 418 static void 419 JobContinueSig(signo) 420 int signo; /* The signal number we've received */ 421 { 422 if (signal(SIGTSTP, SIG_IGN) != SIG_IGN) { 423 (void) signal(SIGTSTP, JobPassSig); 424 } 425 JobRestartJobs(); 426 } 427 #endif 428 429 /*- 430 *----------------------------------------------------------------------- 431 * JobPassSig -- 432 * Pass a signal on to all remote jobs and to all local jobs if 433 * USE_PGRP is defined, then die ourselves. 434 * 435 * Results: 436 * None. 437 * 438 * Side Effects: 439 * We die by the same signal. 440 * 441 *----------------------------------------------------------------------- 442 */ 443 static void 444 JobPassSig(signo) 445 int signo; /* The signal number we've received */ 446 { 447 sigset_t nmask, omask; 448 struct sigaction act; 449 int sigcont; 450 451 if (DEBUG(JOB)) { 452 (void) fprintf(stdout, "JobPassSig(%d) called.\n", signo); 453 (void) fflush(stdout); 454 } 455 Lst_ForEach(jobs, JobCondPassSig, (ClientData) &signo); 456 457 /* 458 * Deal with proper cleanup based on the signal received. We only run 459 * the .INTERRUPT target if the signal was in fact an interrupt. The other 460 * three termination signals are more of a "get out *now*" command. 461 */ 462 if (signo == SIGINT) { 463 JobInterrupt(TRUE, signo); 464 } else if ((signo == SIGHUP) || (signo == SIGTERM) || (signo == SIGQUIT)) { 465 JobInterrupt(FALSE, signo); 466 } 467 468 /* 469 * Leave gracefully if SIGQUIT, rather than core dumping. 470 */ 471 if (signo == SIGQUIT) { 472 Finish(0); 473 } 474 475 if (signo == SIGTSTP) { 476 Job_CatchChildren(FALSE); 477 } 478 /* 479 * Send ourselves the signal now we've given the message to everyone else. 480 * Note we block everything else possible while we're getting the signal. 481 * This ensures that all our jobs get continued when we wake up before 482 * we take any other signal. 483 */ 484 sigfillset(&nmask); 485 sigprocmask(SIG_SETMASK, &nmask, &omask); 486 act.sa_handler = SIG_DFL; 487 sigemptyset(&act.sa_mask); 488 act.sa_flags = 0; 489 sigaction(signo, &act, NULL); 490 491 if (DEBUG(JOB)) { 492 (void) fprintf(stdout, 493 "JobPassSig passing signal %d to self.\n", signo); 494 (void) fflush(stdout); 495 } 496 497 (void) kill(getpid(), signo); 498 if (signo != SIGTSTP) { 499 sigcont = SIGCONT; 500 Lst_ForEach(jobs, JobCondPassSig, (ClientData) &sigcont); 501 } 502 503 (void) sigprocmask(SIG_SETMASK, &omask, NULL); 504 sigprocmask(SIG_SETMASK, &omask, NULL); 505 if (signo != SIGCONT && signo != SIGTSTP) { 506 act.sa_handler = JobPassSig; 507 sigaction(sigcont, &act, NULL); 508 } 509 } 510 511 /*- 512 *----------------------------------------------------------------------- 513 * JobCmpPid -- 514 * Compare the pid of the job with the given pid and return 0 if they 515 * are equal. This function is called from Job_CatchChildren via 516 * Lst_Find to find the job descriptor of the finished job. 517 * 518 * Results: 519 * 0 if the pid's match 520 * 521 * Side Effects: 522 * None 523 *----------------------------------------------------------------------- 524 */ 525 static int 526 JobCmpPid(job, pid) 527 ClientData job; /* job to examine */ 528 ClientData pid; /* process id desired */ 529 { 530 return *(int *) pid - ((Job *) job)->pid; 531 } 532 533 #ifdef REMOTE 534 /*- 535 *----------------------------------------------------------------------- 536 * JobCmpRmtID -- 537 * Compare the rmtID of the job with the given rmtID and return 0 if they 538 * are equal. 539 * 540 * Results: 541 * 0 if the rmtID's match 542 * 543 * Side Effects: 544 * None. 545 *----------------------------------------------------------------------- 546 */ 547 static int 548 JobCmpRmtID(job, rmtID) 549 ClientData job; /* job to examine */ 550 ClientData rmtID; /* remote id desired */ 551 { 552 return(*(int *) rmtID - *(int *) job->rmtID); 553 } 554 #endif 555 556 /*- 557 *----------------------------------------------------------------------- 558 * JobPrintCommand -- 559 * Put out another command for the given job. If the command starts 560 * with an @ or a - we process it specially. In the former case, 561 * so long as the -s and -n flags weren't given to make, we stick 562 * a shell-specific echoOff command in the script. In the latter, 563 * we ignore errors for the entire job, unless the shell has error 564 * control. 565 * If the command is just "..." we take all future commands for this 566 * job to be commands to be executed once the entire graph has been 567 * made and return non-zero to signal that the end of the commands 568 * was reached. These commands are later attached to the postCommands 569 * node and executed by Job_End when all things are done. 570 * This function is called from JobStart via Lst_ForEach. 571 * 572 * Results: 573 * Always 0, unless the command was "..." 574 * 575 * Side Effects: 576 * If the command begins with a '-' and the shell has no error control, 577 * the JOB_IGNERR flag is set in the job descriptor. 578 * If the command is "..." and we're not ignoring such things, 579 * tailCmds is set to the successor node of the cmd. 580 * numCommands is incremented if the command is actually printed. 581 *----------------------------------------------------------------------- 582 */ 583 static int 584 JobPrintCommand(cmdp, jobp) 585 ClientData cmdp; /* command string to print */ 586 ClientData jobp; /* job for which to print it */ 587 { 588 Boolean noSpecials; /* true if we shouldn't worry about 589 * inserting special commands into 590 * the input stream. */ 591 Boolean shutUp = FALSE; /* true if we put a no echo command 592 * into the command file */ 593 Boolean errOff = FALSE; /* true if we turned error checking 594 * off before printing the command 595 * and need to turn it back on */ 596 char *cmdTemplate; /* Template to use when printing the 597 * command */ 598 char *cmdStart; /* Start of expanded command */ 599 char *cmd = (char *) cmdp; 600 Job *job = (Job *) jobp; 601 char *cp; 602 603 noSpecials = NoExecute(job->node); 604 605 if (strcmp(cmd, "...") == 0) { 606 job->node->type |= OP_SAVE_CMDS; 607 if ((job->flags & JOB_IGNDOTS) == 0) { 608 job->tailCmds = Lst_Succ(Lst_Member(job->node->commands, 609 (ClientData)cmd)); 610 return 1; 611 } 612 return 0; 613 } 614 615 #define DBPRINTF(fmt, arg) if (DEBUG(JOB)) { \ 616 (void) fprintf(stdout, fmt, arg); \ 617 (void) fflush(stdout); \ 618 } \ 619 (void) fprintf(job->cmdFILE, fmt, arg); \ 620 (void) fflush(job->cmdFILE); 621 622 numCommands += 1; 623 624 cmdStart = cmd = Var_Subst(NULL, cmd, job->node, FALSE); 625 626 cmdTemplate = "%s\n"; 627 628 /* 629 * Check for leading @' and -'s to control echoing and error checking. 630 */ 631 while (*cmd == '@' || *cmd == '-') { 632 if (*cmd == '@') { 633 shutUp = TRUE; 634 } else { 635 errOff = TRUE; 636 } 637 cmd++; 638 } 639 640 while (isspace((unsigned char) *cmd)) 641 cmd++; 642 643 if (shutUp) { 644 if (!(job->flags & JOB_SILENT) && !noSpecials && 645 commandShell->hasEchoCtl) { 646 DBPRINTF("%s\n", commandShell->echoOff); 647 } else { 648 shutUp = FALSE; 649 } 650 } 651 652 if (errOff) { 653 if ( !(job->flags & JOB_IGNERR) && !noSpecials) { 654 if (commandShell->hasErrCtl) { 655 /* 656 * we don't want the error-control commands showing 657 * up either, so we turn off echoing while executing 658 * them. We could put another field in the shell 659 * structure to tell JobDoOutput to look for this 660 * string too, but why make it any more complex than 661 * it already is? 662 */ 663 if (!(job->flags & JOB_SILENT) && !shutUp && 664 commandShell->hasEchoCtl) { 665 DBPRINTF("%s\n", commandShell->echoOff); 666 DBPRINTF("%s\n", commandShell->ignErr); 667 DBPRINTF("%s\n", commandShell->echoOn); 668 } else { 669 DBPRINTF("%s\n", commandShell->ignErr); 670 } 671 } else if (commandShell->ignErr && 672 (*commandShell->ignErr != '\0')) 673 { 674 /* 675 * The shell has no error control, so we need to be 676 * weird to get it to ignore any errors from the command. 677 * If echoing is turned on, we turn it off and use the 678 * errCheck template to echo the command. Leave echoing 679 * off so the user doesn't see the weirdness we go through 680 * to ignore errors. Set cmdTemplate to use the weirdness 681 * instead of the simple "%s\n" template. 682 */ 683 if (!(job->flags & JOB_SILENT) && !shutUp && 684 commandShell->hasEchoCtl) { 685 DBPRINTF("%s\n", commandShell->echoOff); 686 DBPRINTF(commandShell->errCheck, cmd); 687 shutUp = TRUE; 688 } 689 cmdTemplate = commandShell->ignErr; 690 /* 691 * The error ignoration (hee hee) is already taken care 692 * of by the ignErr template, so pretend error checking 693 * is still on. 694 */ 695 errOff = FALSE; 696 } else { 697 errOff = FALSE; 698 } 699 } else { 700 errOff = FALSE; 701 } 702 } 703 704 if (DEBUG(SHELL) && strcmp(shellName, "sh") == 0 && 705 (job->flags & JOB_TRACED) == 0) { 706 DBPRINTF("set -%s\n", "x"); 707 job->flags |= JOB_TRACED; 708 } 709 710 if ((cp = Check_Cwd_Cmd(cmd)) != NULL) { 711 DBPRINTF("test -d %s && ", cp); 712 DBPRINTF("cd %s; ", cp); 713 } 714 DBPRINTF(cmdTemplate, cmd); 715 free(cmdStart); 716 717 if (errOff) { 718 /* 719 * If echoing is already off, there's no point in issuing the 720 * echoOff command. Otherwise we issue it and pretend it was on 721 * for the whole command... 722 */ 723 if (!shutUp && !(job->flags & JOB_SILENT) && commandShell->hasEchoCtl){ 724 DBPRINTF("%s\n", commandShell->echoOff); 725 shutUp = TRUE; 726 } 727 DBPRINTF("%s\n", commandShell->errCheck); 728 } 729 if (shutUp) { 730 DBPRINTF("%s\n", commandShell->echoOn); 731 } 732 return 0; 733 } 734 735 /*- 736 *----------------------------------------------------------------------- 737 * JobSaveCommand -- 738 * Save a command to be executed when everything else is done. 739 * Callback function for JobFinish... 740 * 741 * Results: 742 * Always returns 0 743 * 744 * Side Effects: 745 * The command is tacked onto the end of postCommands's commands list. 746 * 747 *----------------------------------------------------------------------- 748 */ 749 static int 750 JobSaveCommand(cmd, gn) 751 ClientData cmd; 752 ClientData gn; 753 { 754 cmd = (ClientData) Var_Subst(NULL, (char *) cmd, (GNode *) gn, FALSE); 755 (void) Lst_AtEnd(postCommands->commands, cmd); 756 return(0); 757 } 758 759 760 /*- 761 *----------------------------------------------------------------------- 762 * JobClose -- 763 * Called to close both input and output pipes when a job is finished. 764 * 765 * Results: 766 * Nada 767 * 768 * Side Effects: 769 * The file descriptors associated with the job are closed. 770 * 771 *----------------------------------------------------------------------- 772 */ 773 static void 774 JobClose(job) 775 Job *job; 776 { 777 if (usePipes && (job->flags & JOB_FIRST)) { 778 #ifdef RMT_WILL_WATCH 779 Rmt_Ignore(job->inPipe); 780 #else 781 #ifdef USE_SELECT 782 FD_CLR(job->inPipe, &outputs); 783 #else 784 clearfd(job); 785 #endif 786 #endif 787 if (job->outPipe != job->inPipe) { 788 (void) close(job->outPipe); 789 } 790 JobDoOutput(job, TRUE); 791 (void) close(job->inPipe); 792 } else { 793 (void) close(job->outFd); 794 JobDoOutput(job, TRUE); 795 } 796 } 797 798 /*- 799 *----------------------------------------------------------------------- 800 * JobFinish -- 801 * Do final processing for the given job including updating 802 * parents and starting new jobs as available/necessary. Note 803 * that we pay no attention to the JOB_IGNERR flag here. 804 * This is because when we're called because of a noexecute flag 805 * or something, jstat.w_status is 0 and when called from 806 * Job_CatchChildren, the status is zeroed if it s/b ignored. 807 * 808 * Results: 809 * None 810 * 811 * Side Effects: 812 * Some nodes may be put on the toBeMade queue. 813 * Final commands for the job are placed on postCommands. 814 * 815 * If we got an error and are aborting (aborting == ABORT_ERROR) and 816 * the job list is now empty, we are done for the day. 817 * If we recognized an error (errors !=0), we set the aborting flag 818 * to ABORT_ERROR so no more jobs will be started. 819 *----------------------------------------------------------------------- 820 */ 821 /*ARGSUSED*/ 822 static void 823 JobFinish(job, status) 824 Job *job; /* job to finish */ 825 int *status; /* sub-why job went away */ 826 { 827 Boolean done; 828 829 if ((WIFEXITED(*status) && 830 (((WEXITSTATUS(*status) != 0) && !(job->flags & JOB_IGNERR)))) || 831 WIFSIGNALED(*status)) 832 { 833 /* 834 * If it exited non-zero and either we're doing things our 835 * way or we're not ignoring errors, the job is finished. 836 * Similarly, if the shell died because of a signal 837 * the job is also finished. In these 838 * cases, finish out the job's output before printing the exit 839 * status... 840 */ 841 #ifdef REMOTE 842 KILL(job->pid, SIGCONT); 843 #endif 844 JobClose(job); 845 if (job->cmdFILE != NULL && job->cmdFILE != stdout) { 846 (void) fclose(job->cmdFILE); 847 job->cmdFILE = NULL; 848 } 849 done = TRUE; 850 #ifdef REMOTE 851 if (job->flags & JOB_REMOTE) 852 Rmt_Done(job->rmtID, job->node); 853 #endif 854 } else if (WIFEXITED(*status)) { 855 /* 856 * Deal with ignored errors in -B mode. We need to print a message 857 * telling of the ignored error as well as setting status.w_status 858 * to 0 so the next command gets run. To do this, we set done to be 859 * TRUE if in -B mode and the job exited non-zero. 860 */ 861 done = WEXITSTATUS(*status) != 0; 862 /* 863 * Old comment said: "Note we don't 864 * want to close down any of the streams until we know we're at the 865 * end." 866 * But we do. Otherwise when are we going to print the rest of the 867 * stuff? 868 */ 869 JobClose(job); 870 #ifdef REMOTE 871 if (job->flags & JOB_REMOTE) 872 Rmt_Done(job->rmtID, job->node); 873 #endif /* REMOTE */ 874 } else { 875 /* 876 * No need to close things down or anything. 877 */ 878 done = FALSE; 879 } 880 881 if (done || 882 WIFSTOPPED(*status) || 883 (WIFSIGNALED(*status) && (WTERMSIG(*status) == SIGCONT))) 884 { 885 FILE *out; 886 887 if (compatMake && !usePipes && (job->flags & JOB_IGNERR)) { 888 /* 889 * If output is going to a file and this job is ignoring 890 * errors, arrange to have the exit status sent to the 891 * output file as well. 892 */ 893 out = fdopen(job->outFd, "w"); 894 if (out == NULL) 895 Punt("Cannot fdopen"); 896 } else { 897 out = stdout; 898 } 899 900 if (WIFEXITED(*status)) { 901 if (DEBUG(JOB)) { 902 (void) fprintf(stdout, "Process %d exited.\n", job->pid); 903 (void) fflush(stdout); 904 } 905 if (WEXITSTATUS(*status) != 0) { 906 if (usePipes && job->node != lastNode) { 907 MESSAGE(out, job->node); 908 lastNode = job->node; 909 } 910 (void) fprintf(out, "*** Error code %d%s\n", 911 WEXITSTATUS(*status), 912 (job->flags & JOB_IGNERR) ? "(ignored)" : ""); 913 914 if (job->flags & JOB_IGNERR) { 915 *status = 0; 916 } 917 } else if (DEBUG(JOB)) { 918 if (usePipes && job->node != lastNode) { 919 MESSAGE(out, job->node); 920 lastNode = job->node; 921 } 922 (void) fprintf(out, "*** Completed successfully\n"); 923 } 924 } else if (WIFSTOPPED(*status) && WSTOPSIG(*status) != SIGCONT) { 925 if (DEBUG(JOB)) { 926 (void) fprintf(stdout, "Process %d stopped.\n", job->pid); 927 (void) fflush(stdout); 928 } 929 if (usePipes && job->node != lastNode) { 930 MESSAGE(out, job->node); 931 lastNode = job->node; 932 } 933 if (!(job->flags & JOB_REMIGRATE)) { 934 switch (WSTOPSIG(*status)) { 935 case SIGTSTP: 936 (void) fprintf(out, "*** Suspended\n"); 937 break; 938 case SIGSTOP: 939 (void) fprintf(out, "*** Stopped\n"); 940 break; 941 default: 942 (void) fprintf(out, "*** Stopped -- signal %d\n", 943 WSTOPSIG(*status)); 944 } 945 } 946 job->flags |= JOB_RESUME; 947 (void)Lst_AtEnd(stoppedJobs, (ClientData)job); 948 #ifdef REMOTE 949 if (job->flags & JOB_REMIGRATE) 950 JobRestart(job); 951 #endif 952 (void) fflush(out); 953 return; 954 } else if (WIFSTOPPED(*status) && WSTOPSIG(*status) == SIGCONT) { 955 /* 956 * If the beastie has continued, shift the Job from the stopped 957 * list to the running one (or re-stop it if concurrency is 958 * exceeded) and go and get another child. 959 */ 960 if (job->flags & (JOB_RESUME|JOB_REMIGRATE|JOB_RESTART)) { 961 if (usePipes && job->node != lastNode) { 962 MESSAGE(out, job->node); 963 lastNode = job->node; 964 } 965 (void) fprintf(out, "*** Continued\n"); 966 } 967 if (!(job->flags & JOB_CONTINUING)) { 968 if (DEBUG(JOB)) { 969 (void) fprintf(stdout, 970 "Warning: process %d was not continuing.\n", 971 job->pid); 972 (void) fflush(stdout); 973 } 974 #ifdef notdef 975 /* 976 * We don't really want to restart a job from scratch just 977 * because it continued, especially not without killing the 978 * continuing process! That's why this is ifdef'ed out. 979 * FD - 9/17/90 980 */ 981 JobRestart(job); 982 #endif 983 } 984 job->flags &= ~JOB_CONTINUING; 985 Lst_AtEnd(jobs, (ClientData)job); 986 nJobs += 1; 987 if (!(job->flags & JOB_REMOTE)) { 988 if (DEBUG(JOB)) { 989 (void) fprintf(stdout, 990 "Process %d is continuing locally.\n", 991 job->pid); 992 (void) fflush(stdout); 993 } 994 nLocal += 1; 995 } 996 (void) fflush(out); 997 return; 998 } else { 999 if (usePipes && job->node != lastNode) { 1000 MESSAGE(out, job->node); 1001 lastNode = job->node; 1002 } 1003 (void) fprintf(out, "*** Signal %d\n", WTERMSIG(*status)); 1004 } 1005 1006 (void) fflush(out); 1007 } 1008 1009 /* 1010 * Now handle the -B-mode stuff. If the beast still isn't finished, 1011 * try and restart the job on the next command. If JobStart says it's 1012 * ok, it's ok. If there's an error, this puppy is done. 1013 */ 1014 if (compatMake && (WIFEXITED(*status) && 1015 !Lst_IsAtEnd(job->node->commands))) { 1016 switch (JobStart(job->node, job->flags & JOB_IGNDOTS, job)) { 1017 case JOB_RUNNING: 1018 done = FALSE; 1019 break; 1020 case JOB_ERROR: 1021 done = TRUE; 1022 *status = W_EXITCODE(1, 0); 1023 break; 1024 case JOB_FINISHED: 1025 /* 1026 * If we got back a JOB_FINISHED code, JobStart has already 1027 * called Make_Update and freed the job descriptor. We set 1028 * done to false here to avoid fake cycles and double frees. 1029 * JobStart needs to do the update so we can proceed up the 1030 * graph when given the -n flag.. 1031 */ 1032 done = FALSE; 1033 break; 1034 } 1035 } else { 1036 done = TRUE; 1037 } 1038 1039 if (done) { 1040 Trace_Log(JOBEND, job); 1041 if (!compatMake && !(job->flags & JOB_SPECIAL)) { 1042 if ((*status != 0) || 1043 (aborting == ABORT_ERROR) || 1044 (aborting == ABORT_INTERRUPT)) 1045 Job_TokenReturn(); 1046 } 1047 1048 } 1049 1050 if (done && 1051 (aborting != ABORT_ERROR) && 1052 (aborting != ABORT_INTERRUPT) && 1053 (*status == 0)) 1054 { 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 != NILLNODE) { 1062 Lst_ForEachFrom(job->node->commands, job->tailCmds, 1063 JobSaveCommand, 1064 (ClientData)job->node); 1065 } 1066 job->node->made = MADE; 1067 if (!(job->flags & JOB_SPECIAL)) 1068 Job_TokenReturn(); 1069 Make_Update(job->node); 1070 free((Address)job); 1071 } else if (*status != 0) { 1072 errors += 1; 1073 free((Address)job); 1074 } 1075 JobRestartJobs(); 1076 1077 /* 1078 * Set aborting if any error. 1079 */ 1080 if (errors && !keepgoing && (aborting != ABORT_INTERRUPT)) { 1081 /* 1082 * If we found any errors in this batch of children and the -k flag 1083 * wasn't given, we set the aborting flag so no more jobs get 1084 * started. 1085 */ 1086 aborting = ABORT_ERROR; 1087 } 1088 1089 if ((aborting == ABORT_ERROR) && Job_Empty()) { 1090 /* 1091 * If we are aborting and the job table is now empty, we finish. 1092 */ 1093 Finish(errors); 1094 } 1095 } 1096 1097 /*- 1098 *----------------------------------------------------------------------- 1099 * Job_Touch -- 1100 * Touch the given target. Called by JobStart when the -t flag was 1101 * given 1102 * 1103 * Results: 1104 * None 1105 * 1106 * Side Effects: 1107 * The data modification of the file is changed. In addition, if the 1108 * file did not exist, it is created. 1109 *----------------------------------------------------------------------- 1110 */ 1111 void 1112 Job_Touch(gn, silent) 1113 GNode *gn; /* the node of the file to touch */ 1114 Boolean silent; /* TRUE if should not print messages */ 1115 { 1116 int streamID; /* ID of stream opened to do the touch */ 1117 struct utimbuf times; /* Times for utime() call */ 1118 1119 if (gn->type & (OP_JOIN|OP_USE|OP_USEBEFORE|OP_EXEC|OP_OPTIONAL|OP_PHONY)) { 1120 /* 1121 * .JOIN, .USE, .ZEROTIME and .OPTIONAL targets are "virtual" targets 1122 * and, as such, shouldn't really be created. 1123 */ 1124 return; 1125 } 1126 1127 if (!silent || NoExecute(gn)) { 1128 (void) fprintf(stdout, "touch %s\n", gn->name); 1129 (void) fflush(stdout); 1130 } 1131 1132 if (NoExecute(gn)) { 1133 return; 1134 } 1135 1136 if (gn->type & OP_ARCHV) { 1137 Arch_Touch(gn); 1138 } else if (gn->type & OP_LIB) { 1139 Arch_TouchLib(gn); 1140 } else { 1141 char *file = gn->path ? gn->path : gn->name; 1142 1143 times.actime = times.modtime = now; 1144 if (utime(file, ×) < 0){ 1145 streamID = open(file, O_RDWR | O_CREAT, 0666); 1146 1147 if (streamID >= 0) { 1148 char c; 1149 1150 /* 1151 * Read and write a byte to the file to change the 1152 * modification time, then close the file. 1153 */ 1154 if (read(streamID, &c, 1) == 1) { 1155 (void) lseek(streamID, (off_t)0, SEEK_SET); 1156 (void) write(streamID, &c, 1); 1157 } 1158 1159 (void) close(streamID); 1160 } else { 1161 (void) fprintf(stdout, "*** couldn't touch %s: %s", 1162 file, strerror(errno)); 1163 (void) fflush(stdout); 1164 } 1165 } 1166 } 1167 } 1168 1169 /*- 1170 *----------------------------------------------------------------------- 1171 * Job_CheckCommands -- 1172 * Make sure the given node has all the commands it needs. 1173 * 1174 * Results: 1175 * TRUE if the commands list is/was ok. 1176 * 1177 * Side Effects: 1178 * The node will have commands from the .DEFAULT rule added to it 1179 * if it needs them. 1180 *----------------------------------------------------------------------- 1181 */ 1182 Boolean 1183 Job_CheckCommands(gn, abortProc) 1184 GNode *gn; /* The target whose commands need 1185 * verifying */ 1186 void (*abortProc) __P((char *, ...)); 1187 /* Function to abort with message */ 1188 { 1189 if (OP_NOP(gn->type) && Lst_IsEmpty(gn->commands) && 1190 (gn->type & OP_LIB) == 0) { 1191 /* 1192 * No commands. Look for .DEFAULT rule from which we might infer 1193 * commands 1194 */ 1195 if ((DEFAULT != NILGNODE) && !Lst_IsEmpty(DEFAULT->commands)) { 1196 char *p1; 1197 /* 1198 * Make only looks for a .DEFAULT if the node was never the 1199 * target of an operator, so that's what we do too. If 1200 * a .DEFAULT was given, we substitute its commands for gn's 1201 * commands and set the IMPSRC variable to be the target's name 1202 * The DEFAULT node acts like a transformation rule, in that 1203 * gn also inherits any attributes or sources attached to 1204 * .DEFAULT itself. 1205 */ 1206 Make_HandleUse(DEFAULT, gn); 1207 Var_Set(IMPSRC, Var_Value(TARGET, gn, &p1), gn, 0); 1208 if (p1) 1209 free(p1); 1210 } else if (Dir_MTime(gn) == 0) { 1211 /* 1212 * The node wasn't the target of an operator we have no .DEFAULT 1213 * rule to go on and the target doesn't already exist. There's 1214 * nothing more we can do for this branch. If the -k flag wasn't 1215 * given, we stop in our tracks, otherwise we just don't update 1216 * this node's parents so they never get examined. 1217 */ 1218 static const char msg[] = ": don't know how to make"; 1219 1220 if (gn->type & OP_OPTIONAL) { 1221 (void) fprintf(stdout, "%s%s %s(ignored)\n", progname, 1222 msg, gn->name); 1223 (void) fflush(stdout); 1224 } else if (keepgoing) { 1225 (void) fprintf(stdout, "%s%s %s(continuing)\n", progname, 1226 msg, gn->name); 1227 (void) fflush(stdout); 1228 return FALSE; 1229 } else { 1230 (*abortProc)("%s%s %s. Stop", progname, msg, gn->name); 1231 return FALSE; 1232 } 1233 } 1234 } 1235 return TRUE; 1236 } 1237 #ifdef RMT_WILL_WATCH 1238 /*- 1239 *----------------------------------------------------------------------- 1240 * JobLocalInput -- 1241 * Handle a pipe becoming readable. Callback function for Rmt_Watch 1242 * 1243 * Results: 1244 * None 1245 * 1246 * Side Effects: 1247 * JobDoOutput is called. 1248 * 1249 *----------------------------------------------------------------------- 1250 */ 1251 /*ARGSUSED*/ 1252 static void 1253 JobLocalInput(stream, job) 1254 int stream; /* Stream that's ready (ignored) */ 1255 Job *job; /* Job to which the stream belongs */ 1256 { 1257 JobDoOutput(job, FALSE); 1258 } 1259 #endif /* RMT_WILL_WATCH */ 1260 1261 /*- 1262 *----------------------------------------------------------------------- 1263 * JobExec -- 1264 * Execute the shell for the given job. Called from JobStart and 1265 * JobRestart. 1266 * 1267 * Results: 1268 * None. 1269 * 1270 * Side Effects: 1271 * A shell is executed, outputs is altered and the Job structure added 1272 * to the job table. 1273 * 1274 *----------------------------------------------------------------------- 1275 */ 1276 static void 1277 JobExec(job, argv) 1278 Job *job; /* Job to execute */ 1279 char **argv; 1280 { 1281 int cpid; /* ID of new child */ 1282 1283 job->flags &= ~JOB_TRACED; 1284 1285 if (DEBUG(JOB)) { 1286 int i; 1287 1288 (void) fprintf(stdout, "Running %s %sly\n", job->node->name, 1289 job->flags&JOB_REMOTE?"remote":"local"); 1290 (void) fprintf(stdout, "\tCommand: "); 1291 for (i = 0; argv[i] != NULL; i++) { 1292 (void) fprintf(stdout, "%s ", argv[i]); 1293 } 1294 (void) fprintf(stdout, "\n"); 1295 (void) fflush(stdout); 1296 } 1297 1298 /* 1299 * Some jobs produce no output and it's disconcerting to have 1300 * no feedback of their running (since they produce no output, the 1301 * banner with their name in it never appears). This is an attempt to 1302 * provide that feedback, even if nothing follows it. 1303 */ 1304 if ((lastNode != job->node) && (job->flags & JOB_FIRST) && 1305 !(job->flags & JOB_SILENT)) { 1306 MESSAGE(stdout, job->node); 1307 lastNode = job->node; 1308 } 1309 1310 #ifdef RMT_NO_EXEC 1311 if (job->flags & JOB_REMOTE) { 1312 goto jobExecFinish; 1313 } 1314 #endif /* RMT_NO_EXEC */ 1315 1316 if ((cpid = vfork()) == -1) { 1317 Punt("Cannot vfork: %s", strerror(errno)); 1318 } else if (cpid == 0) { 1319 1320 /* 1321 * Must duplicate the input stream down to the child's input and 1322 * reset it to the beginning (again). Since the stream was marked 1323 * close-on-exec, we must clear that bit in the new input. 1324 */ 1325 if (dup2(FILENO(job->cmdFILE), 0) == -1) 1326 Punt("Cannot dup2: %s", strerror(errno)); 1327 (void) fcntl(0, F_SETFD, 0); 1328 (void) lseek(0, (off_t)0, SEEK_SET); 1329 1330 if (job->node->type & OP_MAKE) { 1331 /* 1332 * Pass job token pipe to submakes. 1333 */ 1334 fcntl(job_pipe[0], F_SETFD, 0); 1335 fcntl(job_pipe[1], F_SETFD, 0); 1336 } 1337 1338 if (usePipes) { 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 Punt("Cannot dup2: %s", strerror(errno)); 1345 } else { 1346 /* 1347 * We're capturing output in a file, so we duplicate the 1348 * descriptor to the temporary file into the standard 1349 * output. 1350 */ 1351 if (dup2(job->outFd, 1) == -1) 1352 Punt("Cannot dup2: %s", strerror(errno)); 1353 } 1354 /* 1355 * The output channels are marked close on exec. This bit was 1356 * duplicated by the dup2 (on some systems), so we have to clear 1357 * it before routing the shell's error output to the same place as 1358 * its standard output. 1359 */ 1360 (void) fcntl(1, F_SETFD, 0); 1361 if (dup2(1, 2) == -1) 1362 Punt("Cannot dup2: %s", strerror(errno)); 1363 1364 #ifdef USE_PGRP 1365 /* 1366 * We want to switch the child into a different process family so 1367 * we can kill it and all its descendants in one fell swoop, 1368 * by killing its process family, but not commit suicide. 1369 */ 1370 # if defined(SYSV) 1371 (void) setsid(); 1372 # else 1373 (void) setpgid(0, getpid()); 1374 # endif 1375 #endif /* USE_PGRP */ 1376 1377 #ifdef REMOTE 1378 if (job->flags & JOB_REMOTE) { 1379 Rmt_Exec(shellPath, argv, FALSE); 1380 } else 1381 #endif /* REMOTE */ 1382 { 1383 (void) execv(shellPath, argv); 1384 execError(shellPath); 1385 } 1386 _exit(1); 1387 } else { 1388 #ifdef REMOTE 1389 sigset_t nmask, omask; 1390 sigemptyset(&nmask); 1391 sigaddset(&nmask, SIGCHLD); 1392 sigprocmask(SIG_BLOCK, &nmask, &omask); 1393 #endif 1394 job->pid = cpid; 1395 1396 Trace_Log(JOBSTART, job); 1397 1398 if (usePipes && (job->flags & JOB_FIRST)) { 1399 /* 1400 * The first time a job is run for a node, we set the current 1401 * position in the buffer to the beginning and mark another 1402 * stream to watch in the outputs mask 1403 */ 1404 job->curPos = 0; 1405 1406 #ifdef RMT_WILL_WATCH 1407 Rmt_Watch(job->inPipe, JobLocalInput, job); 1408 #else 1409 #ifdef USE_SELECT 1410 FD_SET(job->inPipe, &outputs); 1411 #else 1412 watchfd(job); 1413 #endif 1414 #endif /* RMT_WILL_WATCH */ 1415 } 1416 1417 if (job->flags & JOB_REMOTE) { 1418 #ifndef REMOTE 1419 job->rmtID = 0; 1420 #else 1421 job->rmtID = Rmt_LastID(job->pid); 1422 #endif /* REMOTE */ 1423 } else { 1424 nLocal += 1; 1425 /* 1426 * XXX: Used to not happen if REMOTE. Why? 1427 */ 1428 if (job->cmdFILE != NULL && job->cmdFILE != stdout) { 1429 (void) fclose(job->cmdFILE); 1430 job->cmdFILE = NULL; 1431 } 1432 } 1433 #ifdef REMOTE 1434 sigprocmask(SIG_SETMASK, &omask, NULL); 1435 #endif 1436 } 1437 1438 #ifdef RMT_NO_EXEC 1439 jobExecFinish: 1440 #endif 1441 /* 1442 * Now the job is actually running, add it to the table. 1443 */ 1444 nJobs += 1; 1445 (void) Lst_AtEnd(jobs, (ClientData)job); 1446 } 1447 1448 /*- 1449 *----------------------------------------------------------------------- 1450 * JobMakeArgv -- 1451 * Create the argv needed to execute the shell for a given job. 1452 * 1453 * 1454 * Results: 1455 * 1456 * Side Effects: 1457 * 1458 *----------------------------------------------------------------------- 1459 */ 1460 static void 1461 JobMakeArgv(job, argv) 1462 Job *job; 1463 char **argv; 1464 { 1465 int argc; 1466 static char args[10]; /* For merged arguments */ 1467 1468 argv[0] = shellName; 1469 argc = 1; 1470 1471 if ((commandShell->exit && (*commandShell->exit != '-')) || 1472 (commandShell->echo && (*commandShell->echo != '-'))) 1473 { 1474 /* 1475 * At least one of the flags doesn't have a minus before it, so 1476 * merge them together. Have to do this because the *(&(@*#*&#$# 1477 * Bourne shell thinks its second argument is a file to source. 1478 * Grrrr. Note the ten-character limitation on the combined arguments. 1479 */ 1480 (void)snprintf(args, sizeof(args), "-%s%s", 1481 ((job->flags & JOB_IGNERR) ? "" : 1482 (commandShell->exit ? commandShell->exit : "")), 1483 ((job->flags & JOB_SILENT) ? "" : 1484 (commandShell->echo ? commandShell->echo : ""))); 1485 1486 if (args[1]) { 1487 argv[argc] = args; 1488 argc++; 1489 } 1490 } else { 1491 if (!(job->flags & JOB_IGNERR) && commandShell->exit) { 1492 argv[argc] = commandShell->exit; 1493 argc++; 1494 } 1495 if (!(job->flags & JOB_SILENT) && commandShell->echo) { 1496 argv[argc] = commandShell->echo; 1497 argc++; 1498 } 1499 } 1500 argv[argc] = NULL; 1501 } 1502 1503 /*- 1504 *----------------------------------------------------------------------- 1505 * JobRestart -- 1506 * Restart a job that stopped for some reason. 1507 * 1508 * Results: 1509 * None. 1510 * 1511 *----------------------------------------------------------------------- 1512 */ 1513 static void 1514 JobRestart(job) 1515 Job *job; /* Job to restart */ 1516 { 1517 #ifdef REMOTE 1518 int host; 1519 #endif 1520 1521 if (job->flags & JOB_REMIGRATE) { 1522 if ( 1523 #ifdef REMOTE 1524 verboseRemigrates || 1525 #endif 1526 DEBUG(JOB)) { 1527 (void) fprintf(stdout, "*** remigrating %x(%s)\n", 1528 job->pid, job->node->name); 1529 (void) fflush(stdout); 1530 } 1531 1532 #ifdef REMOTE 1533 if (!Rmt_ReExport(job->pid, job->node, &host)) { 1534 if (verboseRemigrates || DEBUG(JOB)) { 1535 (void) fprintf(stdout, "*** couldn't migrate...\n"); 1536 (void) fflush(stdout); 1537 } 1538 #endif 1539 if (nLocal != maxLocal) { 1540 /* 1541 * Job cannot be remigrated, but there's room on the local 1542 * machine, so resume the job and note that another 1543 * local job has started. 1544 */ 1545 if ( 1546 #ifdef REMOTE 1547 verboseRemigrates || 1548 #endif 1549 DEBUG(JOB)) { 1550 (void) fprintf(stdout, "*** resuming on local machine\n"); 1551 (void) fflush(stdout); 1552 } 1553 KILL(job->pid, SIGCONT); 1554 nLocal +=1; 1555 #ifdef REMOTE 1556 job->flags &= ~(JOB_REMIGRATE|JOB_RESUME|JOB_REMOTE); 1557 job->flags |= JOB_CONTINUING; 1558 #else 1559 job->flags &= ~(JOB_REMIGRATE|JOB_RESUME); 1560 #endif 1561 } else { 1562 /* 1563 * Job cannot be restarted. Mark the table as full and 1564 * place the job back on the list of stopped jobs. 1565 */ 1566 if ( 1567 #ifdef REMOTE 1568 verboseRemigrates || 1569 #endif 1570 DEBUG(JOB)) { 1571 (void) fprintf(stdout, "*** holding\n"); 1572 (void) fflush(stdout); 1573 } 1574 (void)Lst_AtFront(stoppedJobs, (ClientData)job); 1575 return; 1576 } 1577 #ifdef REMOTE 1578 } else { 1579 /* 1580 * Clear out the remigrate and resume flags. Set the continuing 1581 * flag so we know later on that the process isn't exiting just 1582 * because of a signal. 1583 */ 1584 job->flags &= ~(JOB_REMIGRATE|JOB_RESUME); 1585 job->flags |= JOB_CONTINUING; 1586 job->rmtID = host; 1587 } 1588 #endif 1589 1590 (void)Lst_AtEnd(jobs, (ClientData)job); 1591 nJobs += 1; 1592 } else if (job->flags & JOB_RESTART) { 1593 /* 1594 * Set up the control arguments to the shell. This is based on the 1595 * flags set earlier for this job. If the JOB_IGNERR flag is clear, 1596 * the 'exit' flag of the commandShell is used to cause it to exit 1597 * upon receiving an error. If the JOB_SILENT flag is clear, the 1598 * 'echo' flag of the commandShell is used to get it to start echoing 1599 * as soon as it starts processing commands. 1600 */ 1601 char *argv[10]; 1602 1603 JobMakeArgv(job, argv); 1604 1605 if (DEBUG(JOB)) { 1606 (void) fprintf(stdout, "Restarting %s...", job->node->name); 1607 (void) fflush(stdout); 1608 } 1609 #ifdef REMOTE 1610 if ((job->node->type&OP_NOEXPORT) || 1611 (nLocal < maxLocal && runLocalFirst) 1612 # ifdef RMT_NO_EXEC 1613 || !Rmt_Export(shellPath, argv, job) 1614 # else 1615 || !Rmt_Begin(shellPath, argv, job->node) 1616 # endif 1617 #endif 1618 { 1619 if (((nLocal >= maxLocal) && !(job->flags & JOB_SPECIAL))) { 1620 /* 1621 * Can't be exported and not allowed to run locally -- put it 1622 * back on the hold queue and mark the table full 1623 */ 1624 if (DEBUG(JOB)) { 1625 (void) fprintf(stdout, "holding\n"); 1626 (void) fflush(stdout); 1627 } 1628 (void)Lst_AtFront(stoppedJobs, (ClientData)job); 1629 return; 1630 } else { 1631 /* 1632 * Job may be run locally. 1633 */ 1634 if (DEBUG(JOB)) { 1635 (void) fprintf(stdout, "running locally\n"); 1636 (void) fflush(stdout); 1637 } 1638 job->flags &= ~JOB_REMOTE; 1639 } 1640 } 1641 #ifdef REMOTE 1642 else { 1643 /* 1644 * Can be exported. Hooray! 1645 */ 1646 if (DEBUG(JOB)) { 1647 (void) fprintf(stdout, "exporting\n"); 1648 (void) fflush(stdout); 1649 } 1650 job->flags |= JOB_REMOTE; 1651 } 1652 #endif 1653 JobExec(job, argv); 1654 } else { 1655 /* 1656 * The job has stopped and needs to be restarted. Why it stopped, 1657 * we don't know... 1658 */ 1659 if (DEBUG(JOB)) { 1660 (void) fprintf(stdout, "Resuming %s...", job->node->name); 1661 (void) fflush(stdout); 1662 } 1663 if (((job->flags & JOB_REMOTE) || 1664 (nLocal < maxLocal) || 1665 #ifdef REMOTE 1666 (((job->flags & JOB_SPECIAL) && 1667 (job->node->type & OP_NOEXPORT)) && 1668 (maxLocal == 0))) && 1669 #else 1670 ((job->flags & JOB_SPECIAL) && 1671 (maxLocal == 0))) && 1672 #endif 1673 (nJobs != maxJobs)) 1674 { 1675 /* 1676 * If the job is remote, it's ok to resume it as long as the 1677 * maximum concurrency won't be exceeded. If it's local and 1678 * we haven't reached the local concurrency limit already (or the 1679 * job must be run locally and maxLocal is 0), it's also ok to 1680 * resume it. 1681 */ 1682 Boolean error; 1683 int status; 1684 1685 #ifdef RMT_WANTS_SIGNALS 1686 if (job->flags & JOB_REMOTE) { 1687 error = !Rmt_Signal(job, SIGCONT); 1688 } else 1689 #endif /* RMT_WANTS_SIGNALS */ 1690 error = (KILL(job->pid, SIGCONT) != 0); 1691 1692 if (!error) { 1693 /* 1694 * Make sure the user knows we've continued the beast and 1695 * actually put the thing in the job table. 1696 */ 1697 job->flags |= JOB_CONTINUING; 1698 status = W_STOPCODE(SIGCONT); 1699 JobFinish(job, &status); 1700 1701 job->flags &= ~(JOB_RESUME|JOB_CONTINUING); 1702 if (DEBUG(JOB)) { 1703 (void) fprintf(stdout, "done\n"); 1704 (void) fflush(stdout); 1705 } 1706 } else { 1707 Error("couldn't resume %s: %s", 1708 job->node->name, strerror(errno)); 1709 status = W_EXITCODE(1, 0); 1710 JobFinish(job, &status); 1711 } 1712 } else { 1713 /* 1714 * Job cannot be restarted. Mark the table as full and 1715 * place the job back on the list of stopped jobs. 1716 */ 1717 if (DEBUG(JOB)) { 1718 (void) fprintf(stdout, "table full\n"); 1719 (void) fflush(stdout); 1720 } 1721 (void) Lst_AtFront(stoppedJobs, (ClientData)job); 1722 } 1723 } 1724 } 1725 1726 /*- 1727 *----------------------------------------------------------------------- 1728 * JobStart -- 1729 * Start a target-creation process going for the target described 1730 * by the graph node gn. 1731 * 1732 * Results: 1733 * JOB_ERROR if there was an error in the commands, JOB_FINISHED 1734 * if there isn't actually anything left to do for the job and 1735 * JOB_RUNNING if the job has been started. 1736 * 1737 * Side Effects: 1738 * A new Job node is created and added to the list of running 1739 * jobs. PMake is forked and a child shell created. 1740 *----------------------------------------------------------------------- 1741 */ 1742 static int 1743 JobStart(gn, flags, previous) 1744 GNode *gn; /* target to create */ 1745 int flags; /* flags for the job to override normal ones. 1746 * e.g. JOB_SPECIAL or JOB_IGNDOTS */ 1747 Job *previous; /* The previous Job structure for this node, 1748 * if any. */ 1749 { 1750 register Job *job; /* new job descriptor */ 1751 char *argv[10]; /* Argument vector to shell */ 1752 Boolean cmdsOK; /* true if the nodes commands were all right */ 1753 Boolean local; /* Set true if the job was run locally */ 1754 Boolean noExec; /* Set true if we decide not to run the job */ 1755 int tfd; /* File descriptor to the temp file */ 1756 1757 if (previous != NULL) { 1758 previous->flags &= ~(JOB_FIRST|JOB_IGNERR|JOB_SILENT|JOB_REMOTE); 1759 job = previous; 1760 } else { 1761 job = (Job *) emalloc(sizeof(Job)); 1762 if (job == NULL) { 1763 Punt("JobStart out of memory"); 1764 } 1765 flags |= JOB_FIRST; 1766 } 1767 1768 job->node = gn; 1769 job->tailCmds = NILLNODE; 1770 1771 /* 1772 * Set the initial value of the flags for this job based on the global 1773 * ones and the node's attributes... Any flags supplied by the caller 1774 * are also added to the field. 1775 */ 1776 job->flags = 0; 1777 if (Targ_Ignore(gn)) { 1778 job->flags |= JOB_IGNERR; 1779 } 1780 if (Targ_Silent(gn)) { 1781 job->flags |= JOB_SILENT; 1782 } 1783 job->flags |= flags; 1784 1785 /* 1786 * Check the commands now so any attributes from .DEFAULT have a chance 1787 * to migrate to the node 1788 */ 1789 if (!compatMake && job->flags & JOB_FIRST) { 1790 cmdsOK = Job_CheckCommands(gn, Error); 1791 } else { 1792 cmdsOK = TRUE; 1793 } 1794 1795 #ifndef RMT_WILL_WATCH 1796 #ifndef USE_SELECT 1797 job->inPollfd = NULL; 1798 #endif 1799 #endif 1800 /* 1801 * If the -n flag wasn't given, we open up OUR (not the child's) 1802 * temporary file to stuff commands in it. The thing is rd/wr so we don't 1803 * need to reopen it to feed it to the shell. If the -n flag *was* given, 1804 * we just set the file to be stdout. Cute, huh? 1805 */ 1806 if (((gn->type & OP_MAKE) && !(noRecursiveExecute)) || 1807 (!noExecute && !touchFlag)) { 1808 /* 1809 * tfile is the name of a file into which all shell commands are 1810 * put. It is used over by removing it before the child shell is 1811 * executed. The XXXXXX in the string are replaced by the pid of 1812 * the make process in a 6-character field with leading zeroes. 1813 */ 1814 char tfile[sizeof(TMPPAT)]; 1815 /* 1816 * We're serious here, but if the commands were bogus, we're 1817 * also dead... 1818 */ 1819 if (!cmdsOK) { 1820 DieHorribly(); 1821 } 1822 1823 (void)strcpy(tfile, TMPPAT); 1824 if ((tfd = mkstemp(tfile)) == -1) 1825 Punt("Could not create temporary file %s", strerror(errno)); 1826 (void) eunlink(tfile); 1827 1828 job->cmdFILE = fdopen(tfd, "w+"); 1829 if (job->cmdFILE == NULL) { 1830 Punt("Could not fdopen %s", tfile); 1831 } 1832 (void) fcntl(FILENO(job->cmdFILE), F_SETFD, 1); 1833 /* 1834 * Send the commands to the command file, flush all its buffers then 1835 * rewind and remove the thing. 1836 */ 1837 noExec = FALSE; 1838 1839 /* 1840 * used to be backwards; replace when start doing multiple commands 1841 * per shell. 1842 */ 1843 if (compatMake) { 1844 /* 1845 * Be compatible: If this is the first time for this node, 1846 * verify its commands are ok and open the commands list for 1847 * sequential access by later invocations of JobStart. 1848 * Once that is done, we take the next command off the list 1849 * and print it to the command file. If the command was an 1850 * ellipsis, note that there's nothing more to execute. 1851 */ 1852 if ((job->flags&JOB_FIRST) && (Lst_Open(gn->commands) != SUCCESS)){ 1853 cmdsOK = FALSE; 1854 } else { 1855 LstNode ln = Lst_Next(gn->commands); 1856 1857 if ((ln == NILLNODE) || 1858 JobPrintCommand((ClientData) Lst_Datum(ln), 1859 (ClientData) job)) 1860 { 1861 noExec = TRUE; 1862 Lst_Close(gn->commands); 1863 } 1864 if (noExec && !(job->flags & JOB_FIRST)) { 1865 /* 1866 * If we're not going to execute anything, the job 1867 * is done and we need to close down the various 1868 * file descriptors we've opened for output, then 1869 * call JobDoOutput to catch the final characters or 1870 * send the file to the screen... Note that the i/o streams 1871 * are only open if this isn't the first job. 1872 * Note also that this could not be done in 1873 * Job_CatchChildren b/c it wasn't clear if there were 1874 * more commands to execute or not... 1875 */ 1876 JobClose(job); 1877 } 1878 } 1879 } else { 1880 /* 1881 * We can do all the commands at once. hooray for sanity 1882 */ 1883 numCommands = 0; 1884 Lst_ForEach(gn->commands, JobPrintCommand, (ClientData)job); 1885 1886 /* 1887 * If we didn't print out any commands to the shell script, 1888 * there's not much point in executing the shell, is there? 1889 */ 1890 if (numCommands == 0) { 1891 noExec = TRUE; 1892 } 1893 } 1894 } else if (NoExecute(gn)) { 1895 /* 1896 * Not executing anything -- just print all the commands to stdout 1897 * in one fell swoop. This will still set up job->tailCmds correctly. 1898 */ 1899 if (lastNode != gn) { 1900 MESSAGE(stdout, gn); 1901 lastNode = gn; 1902 } 1903 job->cmdFILE = stdout; 1904 /* 1905 * Only print the commands if they're ok, but don't die if they're 1906 * not -- just let the user know they're bad and keep going. It 1907 * doesn't do any harm in this case and may do some good. 1908 */ 1909 if (cmdsOK) { 1910 Lst_ForEach(gn->commands, JobPrintCommand, (ClientData)job); 1911 } 1912 /* 1913 * Don't execute the shell, thank you. 1914 */ 1915 noExec = TRUE; 1916 } else { 1917 /* 1918 * Just touch the target and note that no shell should be executed. 1919 * Set cmdFILE to stdout to make life easier. Check the commands, too, 1920 * but don't die if they're no good -- it does no harm to keep working 1921 * up the graph. 1922 */ 1923 job->cmdFILE = stdout; 1924 Job_Touch(gn, job->flags&JOB_SILENT); 1925 noExec = TRUE; 1926 } 1927 1928 /* 1929 * If we're not supposed to execute a shell, don't. 1930 */ 1931 if (noExec) { 1932 /* 1933 * Unlink and close the command file if we opened one 1934 */ 1935 if (job->cmdFILE != stdout) { 1936 if (job->cmdFILE != NULL) { 1937 (void) fclose(job->cmdFILE); 1938 job->cmdFILE = NULL; 1939 } 1940 } else { 1941 (void) fflush(stdout); 1942 } 1943 1944 /* 1945 * We only want to work our way up the graph if we aren't here because 1946 * the commands for the job were no good. 1947 */ 1948 if (cmdsOK) { 1949 if (aborting == 0) { 1950 if (job->tailCmds != NILLNODE) { 1951 Lst_ForEachFrom(job->node->commands, job->tailCmds, 1952 JobSaveCommand, 1953 (ClientData)job->node); 1954 } 1955 if (!(job->flags & JOB_SPECIAL)) 1956 Job_TokenReturn(); 1957 Make_Update(job->node); 1958 } 1959 free((Address)job); 1960 return(JOB_FINISHED); 1961 } else { 1962 free((Address)job); 1963 return(JOB_ERROR); 1964 } 1965 } else { 1966 (void) fflush(job->cmdFILE); 1967 } 1968 1969 /* 1970 * Set up the control arguments to the shell. This is based on the flags 1971 * set earlier for this job. 1972 */ 1973 JobMakeArgv(job, argv); 1974 1975 /* 1976 * If we're using pipes to catch output, create the pipe by which we'll 1977 * get the shell's output. If we're using files, print out that we're 1978 * starting a job and then set up its temporary-file name. 1979 */ 1980 if (!compatMake || (job->flags & JOB_FIRST)) { 1981 if (usePipes) { 1982 int fd[2]; 1983 if (pipe(fd) == -1) 1984 Punt("Cannot create pipe: %s", strerror(errno)); 1985 job->inPipe = fd[0]; 1986 #ifdef USE_SELECT 1987 if (job->inPipe >= FD_SETSIZE) 1988 Punt("Ran out of fd_set slots; " 1989 "recompile with a larger FD_SETSIZE."); 1990 #endif 1991 job->outPipe = fd[1]; 1992 (void) fcntl(job->inPipe, F_SETFD, 1); 1993 (void) fcntl(job->outPipe, F_SETFD, 1); 1994 } else { 1995 (void) fprintf(stdout, "Remaking `%s'\n", gn->name); 1996 (void) fflush(stdout); 1997 (void) strcpy(job->outFile, TMPPAT); 1998 job->outFd = mkstemp(job->outFile); 1999 (void) fcntl(job->outFd, F_SETFD, 1); 2000 } 2001 } 2002 2003 #ifdef REMOTE 2004 if (!(gn->type & OP_NOEXPORT) && !(runLocalFirst && nLocal < maxLocal)) { 2005 #ifdef RMT_NO_EXEC 2006 local = !Rmt_Export(shellPath, argv, job); 2007 #else 2008 local = !Rmt_Begin(shellPath, argv, job->node); 2009 #endif /* RMT_NO_EXEC */ 2010 if (!local) { 2011 job->flags |= JOB_REMOTE; 2012 } 2013 } else 2014 #endif 2015 local = TRUE; 2016 2017 if (local && (((nLocal >= maxLocal) && 2018 !(job->flags & JOB_SPECIAL) && 2019 #ifdef REMOTE 2020 (!(gn->type & OP_NOEXPORT) || (maxLocal != 0)) 2021 #else 2022 (maxLocal != 0) 2023 #endif 2024 ))) 2025 { 2026 /* 2027 * The job can only be run locally, but we've hit the limit of 2028 * local concurrency, so put the job on hold until some other job 2029 * finishes. Note that the special jobs (.BEGIN, .INTERRUPT and .END) 2030 * may be run locally even when the local limit has been reached 2031 * (e.g. when maxLocal == 0), though they will be exported if at 2032 * all possible. In addition, any target marked with .NOEXPORT will 2033 * be run locally if maxLocal is 0. 2034 */ 2035 job->flags |= JOB_RESTART; 2036 (void) Lst_AtEnd(stoppedJobs, (ClientData)job); 2037 } else { 2038 JobExec(job, argv); 2039 } 2040 return(JOB_RUNNING); 2041 } 2042 2043 static char * 2044 JobOutput(job, cp, endp, msg) 2045 register Job *job; 2046 register char *cp, *endp; 2047 int msg; 2048 { 2049 register char *ecp; 2050 2051 if (commandShell->noPrint) { 2052 ecp = Str_FindSubstring(cp, commandShell->noPrint); 2053 while (ecp != NULL) { 2054 if (cp != ecp) { 2055 *ecp = '\0'; 2056 if (msg && job->node != lastNode) { 2057 MESSAGE(stdout, job->node); 2058 lastNode = job->node; 2059 } 2060 /* 2061 * The only way there wouldn't be a newline after 2062 * this line is if it were the last in the buffer. 2063 * however, since the non-printable comes after it, 2064 * there must be a newline, so we don't print one. 2065 */ 2066 (void) fprintf(stdout, "%s", cp); 2067 (void) fflush(stdout); 2068 } 2069 cp = ecp + commandShell->noPLen; 2070 if (cp != endp) { 2071 /* 2072 * Still more to print, look again after skipping 2073 * the whitespace following the non-printable 2074 * command.... 2075 */ 2076 cp++; 2077 while (*cp == ' ' || *cp == '\t' || *cp == '\n') { 2078 cp++; 2079 } 2080 ecp = Str_FindSubstring(cp, commandShell->noPrint); 2081 } else { 2082 return cp; 2083 } 2084 } 2085 } 2086 return cp; 2087 } 2088 2089 /*- 2090 *----------------------------------------------------------------------- 2091 * JobDoOutput -- 2092 * This function is called at different times depending on 2093 * whether the user has specified that output is to be collected 2094 * via pipes or temporary files. In the former case, we are called 2095 * whenever there is something to read on the pipe. We collect more 2096 * output from the given job and store it in the job's outBuf. If 2097 * this makes up a line, we print it tagged by the job's identifier, 2098 * as necessary. 2099 * If output has been collected in a temporary file, we open the 2100 * file and read it line by line, transfering it to our own 2101 * output channel until the file is empty. At which point we 2102 * remove the temporary file. 2103 * In both cases, however, we keep our figurative eye out for the 2104 * 'noPrint' line for the shell from which the output came. If 2105 * we recognize a line, we don't print it. If the command is not 2106 * alone on the line (the character after it is not \0 or \n), we 2107 * do print whatever follows it. 2108 * 2109 * Results: 2110 * None 2111 * 2112 * Side Effects: 2113 * curPos may be shifted as may the contents of outBuf. 2114 *----------------------------------------------------------------------- 2115 */ 2116 STATIC void 2117 JobDoOutput(job, finish) 2118 register Job *job; /* the job whose output needs printing */ 2119 Boolean finish; /* TRUE if this is the last time we'll be 2120 * called for this job */ 2121 { 2122 Boolean gotNL = FALSE; /* true if got a newline */ 2123 Boolean fbuf; /* true if our buffer filled up */ 2124 register int nr; /* number of bytes read */ 2125 register int i; /* auxiliary index into outBuf */ 2126 register int max; /* limit for i (end of current data) */ 2127 int nRead; /* (Temporary) number of bytes read */ 2128 2129 FILE *oFILE; /* Stream pointer to shell's output file */ 2130 char inLine[132]; 2131 2132 2133 if (usePipes) { 2134 /* 2135 * Read as many bytes as will fit in the buffer. 2136 */ 2137 end_loop: 2138 gotNL = FALSE; 2139 fbuf = FALSE; 2140 2141 nRead = read(job->inPipe, &job->outBuf[job->curPos], 2142 JOB_BUFSIZE - job->curPos); 2143 if (nRead < 0) { 2144 if (DEBUG(JOB)) { 2145 perror("JobDoOutput(piperead)"); 2146 } 2147 nr = 0; 2148 } else { 2149 nr = nRead; 2150 } 2151 2152 /* 2153 * If we hit the end-of-file (the job is dead), we must flush its 2154 * remaining output, so pretend we read a newline if there's any 2155 * output remaining in the buffer. 2156 * Also clear the 'finish' flag so we stop looping. 2157 */ 2158 if ((nr == 0) && (job->curPos != 0)) { 2159 job->outBuf[job->curPos] = '\n'; 2160 nr = 1; 2161 finish = FALSE; 2162 } else if (nr == 0) { 2163 finish = FALSE; 2164 } 2165 2166 /* 2167 * Look for the last newline in the bytes we just got. If there is 2168 * one, break out of the loop with 'i' as its index and gotNL set 2169 * TRUE. 2170 */ 2171 max = job->curPos + nr; 2172 for (i = job->curPos + nr - 1; i >= job->curPos; i--) { 2173 if (job->outBuf[i] == '\n') { 2174 gotNL = TRUE; 2175 break; 2176 } else if (job->outBuf[i] == '\0') { 2177 /* 2178 * Why? 2179 */ 2180 job->outBuf[i] = ' '; 2181 } 2182 } 2183 2184 if (!gotNL) { 2185 job->curPos += nr; 2186 if (job->curPos == JOB_BUFSIZE) { 2187 /* 2188 * If we've run out of buffer space, we have no choice 2189 * but to print the stuff. sigh. 2190 */ 2191 fbuf = TRUE; 2192 i = job->curPos; 2193 } 2194 } 2195 if (gotNL || fbuf) { 2196 /* 2197 * Need to send the output to the screen. Null terminate it 2198 * first, overwriting the newline character if there was one. 2199 * So long as the line isn't one we should filter (according 2200 * to the shell description), we print the line, preceded 2201 * by a target banner if this target isn't the same as the 2202 * one for which we last printed something. 2203 * The rest of the data in the buffer are then shifted down 2204 * to the start of the buffer and curPos is set accordingly. 2205 */ 2206 job->outBuf[i] = '\0'; 2207 if (i >= job->curPos) { 2208 char *cp; 2209 2210 cp = JobOutput(job, job->outBuf, &job->outBuf[i], FALSE); 2211 2212 /* 2213 * There's still more in that thar buffer. This time, though, 2214 * we know there's no newline at the end, so we add one of 2215 * our own free will. 2216 */ 2217 if (*cp != '\0') { 2218 if (job->node != lastNode) { 2219 MESSAGE(stdout, job->node); 2220 lastNode = job->node; 2221 } 2222 (void) fprintf(stdout, "%s%s", cp, gotNL ? "\n" : ""); 2223 (void) fflush(stdout); 2224 } 2225 } 2226 if (i < max - 1) { 2227 /* shift the remaining characters down */ 2228 (void) memcpy(job->outBuf, &job->outBuf[i + 1], max - (i + 1)); 2229 job->curPos = max - (i + 1); 2230 2231 } else { 2232 /* 2233 * We have written everything out, so we just start over 2234 * from the start of the buffer. No copying. No nothing. 2235 */ 2236 job->curPos = 0; 2237 } 2238 } 2239 if (finish) { 2240 /* 2241 * If the finish flag is true, we must loop until we hit 2242 * end-of-file on the pipe. This is guaranteed to happen 2243 * eventually since the other end of the pipe is now closed 2244 * (we closed it explicitly and the child has exited). When 2245 * we do get an EOF, finish will be set FALSE and we'll fall 2246 * through and out. 2247 */ 2248 goto end_loop; 2249 } 2250 } else { 2251 /* 2252 * We've been called to retrieve the output of the job from the 2253 * temporary file where it's been squirreled away. This consists of 2254 * opening the file, reading the output line by line, being sure not 2255 * to print the noPrint line for the shell we used, then close and 2256 * remove the temporary file. Very simple. 2257 * 2258 * Change to read in blocks and do FindSubString type things as for 2259 * pipes? That would allow for "@echo -n..." 2260 */ 2261 oFILE = fopen(job->outFile, "r"); 2262 if (oFILE != NULL) { 2263 (void) fprintf(stdout, "Results of making %s:\n", job->node->name); 2264 (void) fflush(stdout); 2265 while (fgets(inLine, sizeof(inLine), oFILE) != NULL) { 2266 register char *cp, *endp, *oendp; 2267 2268 cp = inLine; 2269 oendp = endp = inLine + strlen(inLine); 2270 if (endp[-1] == '\n') { 2271 *--endp = '\0'; 2272 } 2273 cp = JobOutput(job, inLine, endp, FALSE); 2274 2275 /* 2276 * There's still more in that thar buffer. This time, though, 2277 * we know there's no newline at the end, so we add one of 2278 * our own free will. 2279 */ 2280 (void) fprintf(stdout, "%s", cp); 2281 (void) fflush(stdout); 2282 if (endp != oendp) { 2283 (void) fprintf(stdout, "\n"); 2284 (void) fflush(stdout); 2285 } 2286 } 2287 (void) fclose(oFILE); 2288 (void) eunlink(job->outFile); 2289 } else { 2290 Punt("Cannot open `%s'", job->outFile); 2291 } 2292 } 2293 } 2294 2295 /*- 2296 *----------------------------------------------------------------------- 2297 * Job_CatchChildren -- 2298 * Handle the exit of a child. Called from Make_Make. 2299 * 2300 * Results: 2301 * none. 2302 * 2303 * Side Effects: 2304 * The job descriptor is removed from the list of children. 2305 * 2306 * Notes: 2307 * We do waits, blocking or not, according to the wisdom of our 2308 * caller, until there are no more children to report. For each 2309 * job, call JobFinish to finish things off. This will take care of 2310 * putting jobs on the stoppedJobs queue. 2311 * 2312 *----------------------------------------------------------------------- 2313 */ 2314 void 2315 Job_CatchChildren(block) 2316 Boolean block; /* TRUE if should block on the wait. */ 2317 { 2318 int pid; /* pid of dead child */ 2319 register Job *job; /* job descriptor for dead child */ 2320 LstNode jnode; /* list element for finding job */ 2321 int status; /* Exit/termination status */ 2322 2323 /* 2324 * Don't even bother if we know there's no one around. 2325 */ 2326 if (nLocal == 0) { 2327 return; 2328 } 2329 2330 while ((pid = waitpid((pid_t) -1, &status, 2331 (block?0:WNOHANG)|WUNTRACED)) > 0) 2332 { 2333 if (DEBUG(JOB)) { 2334 (void) fprintf(stdout, "Process %d exited or stopped %x.\n", pid, 2335 status); 2336 (void) fflush(stdout); 2337 } 2338 2339 2340 jnode = Lst_Find(jobs, (ClientData)&pid, JobCmpPid); 2341 2342 if (jnode == NILLNODE) { 2343 if (WIFSTOPPED(status) && (WSTOPSIG(status) == SIGCONT)) { 2344 jnode = Lst_Find(stoppedJobs, (ClientData) &pid, JobCmpPid); 2345 if (jnode == NILLNODE) { 2346 Error("Resumed child (%d) not in table", pid); 2347 continue; 2348 } 2349 job = (Job *)Lst_Datum(jnode); 2350 (void) Lst_Remove(stoppedJobs, jnode); 2351 } else { 2352 Error("Child (%d) not in table?", pid); 2353 continue; 2354 } 2355 } else { 2356 job = (Job *) Lst_Datum(jnode); 2357 (void) Lst_Remove(jobs, jnode); 2358 nJobs -= 1; 2359 #ifdef REMOTE 2360 if (!(job->flags & JOB_REMOTE)) { 2361 if (DEBUG(JOB)) { 2362 (void) fprintf(stdout, 2363 "Job queue has one fewer local process.\n"); 2364 (void) fflush(stdout); 2365 } 2366 nLocal -= 1; 2367 } 2368 #else 2369 nLocal -= 1; 2370 #endif 2371 } 2372 2373 JobFinish(job, &status); 2374 } 2375 } 2376 2377 /*- 2378 *----------------------------------------------------------------------- 2379 * Job_CatchOutput -- 2380 * Catch the output from our children, if we're using 2381 * pipes do so. Otherwise just block time until we get a 2382 * signal (most likely a SIGCHLD) since there's no point in 2383 * just spinning when there's nothing to do and the reaping 2384 * of a child can wait for a while. 2385 * 2386 * Results: 2387 * None 2388 * 2389 * Side Effects: 2390 * Output is read from pipes if we're piping. 2391 * ----------------------------------------------------------------------- 2392 */ 2393 void 2394 Job_CatchOutput() 2395 { 2396 int nready; 2397 register LstNode ln; 2398 register Job *job; 2399 #ifdef RMT_WILL_WATCH 2400 int pnJobs; /* Previous nJobs */ 2401 #endif 2402 2403 (void) fflush(stdout); 2404 Job_TokenFlush(); 2405 #ifdef RMT_WILL_WATCH 2406 pnJobs = nJobs; 2407 2408 /* 2409 * It is possible for us to be called with nJobs equal to 0. This happens 2410 * if all the jobs finish and a job that is stopped cannot be run 2411 * locally (eg if maxLocal is 0) and cannot be exported. The job will 2412 * be placed back on the stoppedJobs queue, Job_Empty() will return false, 2413 * Make_Run will call us again when there's nothing for which to wait. 2414 * nJobs never changes, so we loop forever. Hence the check. It could 2415 * be argued that we should sleep for a bit so as not to swamp the 2416 * exportation system with requests. Perhaps we should. 2417 * 2418 * NOTE: IT IS THE RESPONSIBILITY OF Rmt_Wait TO CALL Job_CatchChildren 2419 * IN A TIMELY FASHION TO CATCH ANY LOCALLY RUNNING JOBS THAT EXIT. 2420 * It may use the variable nLocal to determine if it needs to call 2421 * Job_CatchChildren (if nLocal is 0, there's nothing for which to 2422 * wait...) 2423 */ 2424 while (nJobs != 0 && pnJobs == nJobs) { 2425 Rmt_Wait(); 2426 } 2427 #else 2428 if (usePipes) { 2429 #ifdef USE_SELECT 2430 struct timeval timeout; 2431 fd_set readfds; 2432 2433 readfds = outputs; 2434 timeout.tv_sec = SEL_SEC; 2435 timeout.tv_usec = SEL_USEC; 2436 2437 if ((nready = select(FD_SETSIZE, &readfds, (fd_set *) 0, 2438 (fd_set *) 0, &timeout)) <= 0) 2439 return; 2440 #else 2441 if ((nready = poll((wantToken ? fds : (fds + 1)), 2442 (wantToken ? nfds : (nfds - 1)), POLL_MSEC)) <= 0) 2443 return; 2444 #endif 2445 else { 2446 if (Lst_Open(jobs) == FAILURE) { 2447 Punt("Cannot open job table"); 2448 } 2449 while (nready && (ln = Lst_Next(jobs)) != NILLNODE) { 2450 job = (Job *) Lst_Datum(ln); 2451 #ifdef USE_SELECT 2452 if (FD_ISSET(job->inPipe, &readfds)) 2453 #else 2454 if (readyfd(job)) 2455 #endif 2456 { 2457 JobDoOutput(job, FALSE); 2458 nready -= 1; 2459 } 2460 2461 } 2462 Lst_Close(jobs); 2463 } 2464 } 2465 #endif /* RMT_WILL_WATCH */ 2466 } 2467 2468 /*- 2469 *----------------------------------------------------------------------- 2470 * Job_Make -- 2471 * Start the creation of a target. Basically a front-end for 2472 * JobStart used by the Make module. 2473 * 2474 * Results: 2475 * None. 2476 * 2477 * Side Effects: 2478 * Another job is started. 2479 * 2480 *----------------------------------------------------------------------- 2481 */ 2482 void 2483 Job_Make(gn) 2484 GNode *gn; 2485 { 2486 (void) JobStart(gn, 0, NULL); 2487 } 2488 2489 /*- 2490 *----------------------------------------------------------------------- 2491 * Job_Init -- 2492 * Initialize the process module 2493 * 2494 * Results: 2495 * none 2496 * 2497 * Side Effects: 2498 * lists and counters are initialized 2499 *----------------------------------------------------------------------- 2500 */ 2501 void 2502 Job_Init(maxproc, maxlocal) 2503 int maxproc; /* the greatest number of jobs which may be 2504 * running at one time */ 2505 int maxlocal; /* the greatest number of local jobs which may 2506 * be running at once. */ 2507 { 2508 GNode *begin; /* node for commands to do at the very start */ 2509 2510 jobs = Lst_Init(FALSE); 2511 stoppedJobs = Lst_Init(FALSE); 2512 maxJobs = maxproc; 2513 maxLocal = maxlocal; 2514 nJobs = 0; 2515 nLocal = 0; 2516 wantToken = FALSE; 2517 2518 aborting = 0; 2519 errors = 0; 2520 2521 lastNode = NILGNODE; 2522 2523 if (maxJobs == 1 2524 #ifdef REMOTE 2525 || noMessages 2526 #endif 2527 ) { 2528 /* 2529 * If only one job can run at a time, there's no need for a banner, 2530 * is there? 2531 */ 2532 targFmt = ""; 2533 } else { 2534 targFmt = TARG_FMT; 2535 } 2536 2537 if (shellPath == NULL) { 2538 /* 2539 * The user didn't specify a shell to use, so we are using the 2540 * default one... Both the absolute path and the last component 2541 * must be set. The last component is taken from the 'name' field 2542 * of the default shell description pointed-to by commandShell. 2543 * All default shells are located in _PATH_DEFSHELLDIR. 2544 */ 2545 shellName = commandShell->name; 2546 shellPath = str_concat(_PATH_DEFSHELLDIR, shellName, STR_ADDSLASH); 2547 } 2548 2549 if (commandShell->exit == NULL) { 2550 commandShell->exit = ""; 2551 } 2552 if (commandShell->echo == NULL) { 2553 commandShell->echo = ""; 2554 } 2555 2556 /* 2557 * Catch the four signals that POSIX specifies if they aren't ignored. 2558 * JobPassSig will take care of calling JobInterrupt if appropriate. 2559 */ 2560 if (signal(SIGINT, SIG_IGN) != SIG_IGN) { 2561 (void) signal(SIGINT, JobPassSig); 2562 } 2563 if (signal(SIGHUP, SIG_IGN) != SIG_IGN) { 2564 (void) signal(SIGHUP, JobPassSig); 2565 } 2566 if (signal(SIGQUIT, SIG_IGN) != SIG_IGN) { 2567 (void) signal(SIGQUIT, JobPassSig); 2568 } 2569 if (signal(SIGTERM, SIG_IGN) != SIG_IGN) { 2570 (void) signal(SIGTERM, JobPassSig); 2571 } 2572 /* 2573 * Install a NOOP SIGCHLD handler so we are woken up if we're blocked. 2574 */ 2575 signal(SIGCHLD, JobIgnoreSig); 2576 2577 /* 2578 * There are additional signals that need to be caught and passed if 2579 * either the export system wants to be told directly of signals or if 2580 * we're giving each job its own process group (since then it won't get 2581 * signals from the terminal driver as we own the terminal) 2582 */ 2583 #if defined(RMT_WANTS_SIGNALS) || defined(USE_PGRP) 2584 if (signal(SIGTSTP, SIG_IGN) != SIG_IGN) { 2585 (void) signal(SIGTSTP, JobPassSig); 2586 } 2587 if (signal(SIGTTOU, SIG_IGN) != SIG_IGN) { 2588 (void) signal(SIGTTOU, JobPassSig); 2589 } 2590 if (signal(SIGTTIN, SIG_IGN) != SIG_IGN) { 2591 (void) signal(SIGTTIN, JobPassSig); 2592 } 2593 if (signal(SIGWINCH, SIG_IGN) != SIG_IGN) { 2594 (void) signal(SIGWINCH, JobPassSig); 2595 } 2596 if (signal(SIGCONT, SIG_IGN) != SIG_IGN) { 2597 (void) signal(SIGCONT, JobContinueSig); 2598 } 2599 #endif 2600 2601 begin = Targ_FindNode(".BEGIN", TARG_NOCREATE); 2602 2603 if (begin != NILGNODE) { 2604 JobStart(begin, JOB_SPECIAL, (Job *)0); 2605 while (nJobs) { 2606 Job_CatchOutput(); 2607 #ifndef RMT_WILL_WATCH 2608 Job_CatchChildren(!usePipes); 2609 #endif /* RMT_WILL_WATCH */ 2610 } 2611 } 2612 postCommands = Targ_FindNode(".END", TARG_CREATE); 2613 } 2614 2615 /*- 2616 *----------------------------------------------------------------------- 2617 * Job_Empty -- 2618 * See if the job table is empty. Because the local concurrency may 2619 * be set to 0, it is possible for the job table to become empty, 2620 * while the list of stoppedJobs remains non-empty. In such a case, 2621 * we want to restart as many jobs as we can. 2622 * 2623 * Results: 2624 * TRUE if it is. FALSE if it ain't. 2625 * 2626 * Side Effects: 2627 * None. 2628 * 2629 * ----------------------------------------------------------------------- 2630 */ 2631 Boolean 2632 Job_Empty() 2633 { 2634 if (nJobs == 0) { 2635 if (!Lst_IsEmpty(stoppedJobs) && !aborting) { 2636 /* 2637 * The job table is obviously not full if it has no jobs in 2638 * it...Try and restart the stopped jobs. 2639 */ 2640 JobRestartJobs(); 2641 return(FALSE); 2642 } else { 2643 return(TRUE); 2644 } 2645 } else { 2646 return(FALSE); 2647 } 2648 } 2649 2650 /*- 2651 *----------------------------------------------------------------------- 2652 * JobMatchShell -- 2653 * Find a matching shell in 'shells' given its final component. 2654 * 2655 * Results: 2656 * A pointer to the Shell structure. 2657 * 2658 * Side Effects: 2659 * None. 2660 * 2661 *----------------------------------------------------------------------- 2662 */ 2663 static Shell * 2664 JobMatchShell(name) 2665 char *name; /* Final component of shell path */ 2666 { 2667 register Shell *sh; /* Pointer into shells table */ 2668 Shell *match; /* Longest-matching shell */ 2669 register char *cp1, 2670 *cp2; 2671 char *eoname; 2672 2673 eoname = name + strlen(name); 2674 2675 match = NULL; 2676 2677 for (sh = shells; sh->name != NULL; sh++) { 2678 for (cp1 = eoname - strlen(sh->name), cp2 = sh->name; 2679 *cp1 != '\0' && *cp1 == *cp2; 2680 cp1++, cp2++) { 2681 continue; 2682 } 2683 if (*cp1 != *cp2) { 2684 continue; 2685 } else if (match == NULL || strlen(match->name) < strlen(sh->name)) { 2686 match = sh; 2687 } 2688 } 2689 return(match == NULL ? sh : match); 2690 } 2691 2692 /*- 2693 *----------------------------------------------------------------------- 2694 * Job_ParseShell -- 2695 * Parse a shell specification and set up commandShell, shellPath 2696 * and shellName appropriately. 2697 * 2698 * Results: 2699 * FAILURE if the specification was incorrect. 2700 * 2701 * Side Effects: 2702 * commandShell points to a Shell structure (either predefined or 2703 * created from the shell spec), shellPath is the full path of the 2704 * shell described by commandShell, while shellName is just the 2705 * final component of shellPath. 2706 * 2707 * Notes: 2708 * A shell specification consists of a .SHELL target, with dependency 2709 * operator, followed by a series of blank-separated words. Double 2710 * quotes can be used to use blanks in words. A backslash escapes 2711 * anything (most notably a double-quote and a space) and 2712 * provides the functionality it does in C. Each word consists of 2713 * keyword and value separated by an equal sign. There should be no 2714 * unnecessary spaces in the word. The keywords are as follows: 2715 * name Name of shell. 2716 * path Location of shell. Overrides "name" if given 2717 * quiet Command to turn off echoing. 2718 * echo Command to turn echoing on 2719 * filter Result of turning off echoing that shouldn't be 2720 * printed. 2721 * echoFlag Flag to turn echoing on at the start 2722 * errFlag Flag to turn error checking on at the start 2723 * hasErrCtl True if shell has error checking control 2724 * check Command to turn on error checking if hasErrCtl 2725 * is TRUE or template of command to echo a command 2726 * for which error checking is off if hasErrCtl is 2727 * FALSE. 2728 * ignore Command to turn off error checking if hasErrCtl 2729 * is TRUE or template of command to execute a 2730 * command so as to ignore any errors it returns if 2731 * hasErrCtl is FALSE. 2732 * 2733 *----------------------------------------------------------------------- 2734 */ 2735 ReturnStatus 2736 Job_ParseShell(line) 2737 char *line; /* The shell spec */ 2738 { 2739 char **words; 2740 int wordCount; 2741 register char **argv; 2742 register int argc; 2743 char *path; 2744 Shell newShell; 2745 Boolean fullSpec = FALSE; 2746 2747 while (isspace((unsigned char)*line)) { 2748 line++; 2749 } 2750 2751 if (shellArgv) 2752 free(shellArgv); 2753 2754 words = brk_string(line, &wordCount, TRUE, &shellArgv); 2755 2756 memset((Address)&newShell, 0, sizeof(newShell)); 2757 2758 /* 2759 * Parse the specification by keyword 2760 */ 2761 for (path = NULL, argc = wordCount - 1, argv = words; 2762 argc != 0; 2763 argc--, argv++) { 2764 if (strncmp(*argv, "path=", 5) == 0) { 2765 path = &argv[0][5]; 2766 } else if (strncmp(*argv, "name=", 5) == 0) { 2767 newShell.name = &argv[0][5]; 2768 } else { 2769 if (strncmp(*argv, "quiet=", 6) == 0) { 2770 newShell.echoOff = &argv[0][6]; 2771 } else if (strncmp(*argv, "echo=", 5) == 0) { 2772 newShell.echoOn = &argv[0][5]; 2773 } else if (strncmp(*argv, "filter=", 7) == 0) { 2774 newShell.noPrint = &argv[0][7]; 2775 newShell.noPLen = strlen(newShell.noPrint); 2776 } else if (strncmp(*argv, "echoFlag=", 9) == 0) { 2777 newShell.echo = &argv[0][9]; 2778 } else if (strncmp(*argv, "errFlag=", 8) == 0) { 2779 newShell.exit = &argv[0][8]; 2780 } else if (strncmp(*argv, "hasErrCtl=", 10) == 0) { 2781 char c = argv[0][10]; 2782 newShell.hasErrCtl = !((c != 'Y') && (c != 'y') && 2783 (c != 'T') && (c != 't')); 2784 } else if (strncmp(*argv, "check=", 6) == 0) { 2785 newShell.errCheck = &argv[0][6]; 2786 } else if (strncmp(*argv, "ignore=", 7) == 0) { 2787 newShell.ignErr = &argv[0][7]; 2788 } else { 2789 Parse_Error(PARSE_FATAL, "Unknown keyword \"%s\"", 2790 *argv); 2791 free(words); 2792 return(FAILURE); 2793 } 2794 fullSpec = TRUE; 2795 } 2796 } 2797 2798 if (path == NULL) { 2799 /* 2800 * If no path was given, the user wants one of the pre-defined shells, 2801 * yes? So we find the one s/he wants with the help of JobMatchShell 2802 * and set things up the right way. shellPath will be set up by 2803 * Job_Init. 2804 */ 2805 if (newShell.name == NULL) { 2806 Parse_Error(PARSE_FATAL, "Neither path nor name specified"); 2807 return(FAILURE); 2808 } else { 2809 commandShell = JobMatchShell(newShell.name); 2810 shellName = newShell.name; 2811 } 2812 } else { 2813 /* 2814 * The user provided a path. If s/he gave nothing else (fullSpec is 2815 * FALSE), try and find a matching shell in the ones we know of. 2816 * Else we just take the specification at its word and copy it 2817 * to a new location. In either case, we need to record the 2818 * path the user gave for the shell. 2819 */ 2820 shellPath = path; 2821 path = strrchr(path, '/'); 2822 if (path == NULL) { 2823 path = shellPath; 2824 } else { 2825 path += 1; 2826 } 2827 if (newShell.name != NULL) { 2828 shellName = newShell.name; 2829 } else { 2830 shellName = path; 2831 } 2832 if (!fullSpec) { 2833 commandShell = JobMatchShell(shellName); 2834 } else { 2835 commandShell = (Shell *) emalloc(sizeof(Shell)); 2836 *commandShell = newShell; 2837 } 2838 } 2839 2840 if (commandShell->echoOn && commandShell->echoOff) { 2841 commandShell->hasEchoCtl = TRUE; 2842 } 2843 2844 if (!commandShell->hasErrCtl) { 2845 if (commandShell->errCheck == NULL) { 2846 commandShell->errCheck = ""; 2847 } 2848 if (commandShell->ignErr == NULL) { 2849 commandShell->ignErr = "%s\n"; 2850 } 2851 } 2852 2853 /* 2854 * Do not free up the words themselves, since they might be in use by the 2855 * shell specification. 2856 */ 2857 free(words); 2858 return SUCCESS; 2859 } 2860 2861 /*- 2862 *----------------------------------------------------------------------- 2863 * JobInterrupt -- 2864 * Handle the receipt of an interrupt. 2865 * 2866 * Results: 2867 * None 2868 * 2869 * Side Effects: 2870 * All children are killed. Another job will be started if the 2871 * .INTERRUPT target was given. 2872 *----------------------------------------------------------------------- 2873 */ 2874 static void 2875 JobInterrupt(runINTERRUPT, signo) 2876 int runINTERRUPT; /* Non-zero if commands for the .INTERRUPT 2877 * target should be executed */ 2878 int signo; /* signal received */ 2879 { 2880 LstNode ln; /* element in job table */ 2881 Job *job; /* job descriptor in that element */ 2882 GNode *interrupt; /* the node describing the .INTERRUPT target */ 2883 2884 aborting = ABORT_INTERRUPT; 2885 2886 (void) Lst_Open(jobs); 2887 while ((ln = Lst_Next(jobs)) != NILLNODE) { 2888 job = (Job *) Lst_Datum(ln); 2889 2890 if (!Targ_Precious(job->node)) { 2891 char *file = (job->node->path == NULL ? 2892 job->node->name : 2893 job->node->path); 2894 if (!noExecute && eunlink(file) != -1) { 2895 Error("*** %s removed", file); 2896 } 2897 } 2898 #ifdef RMT_WANTS_SIGNALS 2899 if (job->flags & JOB_REMOTE) { 2900 /* 2901 * If job is remote, let the Rmt module do the killing. 2902 */ 2903 if (!Rmt_Signal(job, signo)) { 2904 /* 2905 * If couldn't kill the thing, finish it out now with an 2906 * error code, since no exit report will come in likely. 2907 */ 2908 int status; 2909 2910 status.w_status = 0; 2911 status.w_retcode = 1; 2912 JobFinish(job, &status); 2913 } 2914 } else if (job->pid) { 2915 KILL(job->pid, signo); 2916 } 2917 #else 2918 if (job->pid) { 2919 if (DEBUG(JOB)) { 2920 (void) fprintf(stdout, 2921 "JobInterrupt passing signal to child %d.\n", 2922 job->pid); 2923 (void) fflush(stdout); 2924 } 2925 KILL(job->pid, signo); 2926 } 2927 #endif /* RMT_WANTS_SIGNALS */ 2928 } 2929 2930 #ifdef REMOTE 2931 (void)Lst_Open(stoppedJobs); 2932 while ((ln = Lst_Next(stoppedJobs)) != NILLNODE) { 2933 job = (Job *) Lst_Datum(ln); 2934 2935 if (job->flags & JOB_RESTART) { 2936 if (DEBUG(JOB)) { 2937 (void) fprintf(stdout, "%s%s", 2938 "JobInterrupt skipping job on stopped queue", 2939 "-- it was waiting to be restarted.\n"); 2940 (void) fflush(stdout); 2941 } 2942 continue; 2943 } 2944 if (!Targ_Precious(job->node)) { 2945 char *file = (job->node->path == NULL ? 2946 job->node->name : 2947 job->node->path); 2948 if (eunlink(file) == 0) { 2949 Error("*** %s removed", file); 2950 } 2951 } 2952 /* 2953 * Resume the thing so it will take the signal. 2954 */ 2955 if (DEBUG(JOB)) { 2956 (void) fprintf(stdout, 2957 "JobInterrupt passing CONT to stopped child %d.\n", 2958 job->pid); 2959 (void) fflush(stdout); 2960 } 2961 KILL(job->pid, SIGCONT); 2962 #ifdef RMT_WANTS_SIGNALS 2963 if (job->flags & JOB_REMOTE) { 2964 /* 2965 * If job is remote, let the Rmt module do the killing. 2966 */ 2967 if (!Rmt_Signal(job, SIGINT)) { 2968 /* 2969 * If couldn't kill the thing, finish it out now with an 2970 * error code, since no exit report will come in likely. 2971 */ 2972 int status; 2973 status.w_status = 0; 2974 status.w_retcode = 1; 2975 JobFinish(job, &status); 2976 } 2977 } else if (job->pid) { 2978 if (DEBUG(JOB)) { 2979 (void) fprintf(stdout, 2980 "JobInterrupt passing interrupt to stopped child %d.\n", 2981 job->pid); 2982 (void) fflush(stdout); 2983 } 2984 KILL(job->pid, SIGINT); 2985 } 2986 #endif /* RMT_WANTS_SIGNALS */ 2987 } 2988 #endif 2989 Lst_Close(stoppedJobs); 2990 2991 if (runINTERRUPT && !touchFlag) { 2992 interrupt = Targ_FindNode(".INTERRUPT", TARG_NOCREATE); 2993 if (interrupt != NILGNODE) { 2994 ignoreErrors = FALSE; 2995 2996 JobStart(interrupt, JOB_IGNDOTS, (Job *)0); 2997 while (nJobs) { 2998 Job_CatchOutput(); 2999 #ifndef RMT_WILL_WATCH 3000 Job_CatchChildren(!usePipes); 3001 #endif /* RMT_WILL_WATCH */ 3002 } 3003 } 3004 } 3005 Trace_Log(MAKEINTR, 0); 3006 exit(signo); 3007 } 3008 3009 /* 3010 *----------------------------------------------------------------------- 3011 * Job_Finish -- 3012 * Do final processing such as the running of the commands 3013 * attached to the .END target. 3014 * 3015 * Results: 3016 * Number of errors reported. 3017 * 3018 * Side Effects: 3019 * None. 3020 *----------------------------------------------------------------------- 3021 */ 3022 int 3023 Job_Finish() 3024 { 3025 if (postCommands != NILGNODE && !Lst_IsEmpty(postCommands->commands)) { 3026 if (errors) { 3027 Error("Errors reported so .END ignored"); 3028 } else { 3029 JobStart(postCommands, JOB_SPECIAL | JOB_IGNDOTS, NULL); 3030 3031 while (nJobs) { 3032 Job_CatchOutput(); 3033 #ifndef RMT_WILL_WATCH 3034 Job_CatchChildren(!usePipes); 3035 #endif /* RMT_WILL_WATCH */ 3036 } 3037 } 3038 } 3039 Job_TokenFlush(); 3040 return(errors); 3041 } 3042 3043 /*- 3044 *----------------------------------------------------------------------- 3045 * Job_End -- 3046 * Cleanup any memory used by the jobs module 3047 * 3048 * Results: 3049 * None. 3050 * 3051 * Side Effects: 3052 * Memory is freed 3053 *----------------------------------------------------------------------- 3054 */ 3055 void 3056 Job_End() 3057 { 3058 #ifdef CLEANUP 3059 if (shellArgv) 3060 free(shellArgv); 3061 #endif 3062 } 3063 3064 /*- 3065 *----------------------------------------------------------------------- 3066 * Job_Wait -- 3067 * Waits for all running jobs to finish and returns. Sets 'aborting' 3068 * to ABORT_WAIT to prevent other jobs from starting. 3069 * 3070 * Results: 3071 * None. 3072 * 3073 * Side Effects: 3074 * Currently running jobs finish. 3075 * 3076 *----------------------------------------------------------------------- 3077 */ 3078 void 3079 Job_Wait() 3080 { 3081 aborting = ABORT_WAIT; 3082 while (nJobs != 0) { 3083 Job_CatchOutput(); 3084 #ifndef RMT_WILL_WATCH 3085 Job_CatchChildren(!usePipes); 3086 #endif /* RMT_WILL_WATCH */ 3087 } 3088 Job_TokenFlush(); 3089 aborting = 0; 3090 } 3091 3092 /*- 3093 *----------------------------------------------------------------------- 3094 * Job_AbortAll -- 3095 * Abort all currently running jobs without handling output or anything. 3096 * This function is to be called only in the event of a major 3097 * error. Most definitely NOT to be called from JobInterrupt. 3098 * 3099 * Results: 3100 * None 3101 * 3102 * Side Effects: 3103 * All children are killed, not just the firstborn 3104 *----------------------------------------------------------------------- 3105 */ 3106 void 3107 Job_AbortAll() 3108 { 3109 LstNode ln; /* element in job table */ 3110 Job *job; /* the job descriptor in that element */ 3111 int foo; 3112 3113 aborting = ABORT_ERROR; 3114 3115 if (nJobs) { 3116 3117 (void) Lst_Open(jobs); 3118 while ((ln = Lst_Next(jobs)) != NILLNODE) { 3119 job = (Job *) Lst_Datum(ln); 3120 3121 /* 3122 * kill the child process with increasingly drastic signals to make 3123 * darn sure it's dead. 3124 */ 3125 #ifdef RMT_WANTS_SIGNALS 3126 if (job->flags & JOB_REMOTE) { 3127 Rmt_Signal(job, SIGINT); 3128 Rmt_Signal(job, SIGKILL); 3129 } else { 3130 KILL(job->pid, SIGINT); 3131 KILL(job->pid, SIGKILL); 3132 } 3133 #else 3134 KILL(job->pid, SIGINT); 3135 KILL(job->pid, SIGKILL); 3136 #endif /* RMT_WANTS_SIGNALS */ 3137 } 3138 } 3139 3140 /* 3141 * Catch as many children as want to report in at first, then give up 3142 */ 3143 while (waitpid((pid_t) -1, &foo, WNOHANG) > 0) 3144 continue; 3145 } 3146 3147 #ifdef REMOTE 3148 /*- 3149 *----------------------------------------------------------------------- 3150 * JobFlagForMigration -- 3151 * Handle the eviction of a child. Called from RmtStatusChange. 3152 * Flags the child as remigratable and then suspends it. 3153 * 3154 * Results: 3155 * none. 3156 * 3157 * Side Effects: 3158 * The job descriptor is flagged for remigration. 3159 * 3160 *----------------------------------------------------------------------- 3161 */ 3162 void 3163 JobFlagForMigration(hostID) 3164 int hostID; /* ID of host we used, for matching children. */ 3165 { 3166 register Job *job; /* job descriptor for dead child */ 3167 LstNode jnode; /* list element for finding job */ 3168 3169 if (DEBUG(JOB)) { 3170 (void) fprintf(stdout, "JobFlagForMigration(%d) called.\n", hostID); 3171 (void) fflush(stdout); 3172 } 3173 jnode = Lst_Find(jobs, (ClientData)hostID, JobCmpRmtID); 3174 3175 if (jnode == NILLNODE) { 3176 jnode = Lst_Find(stoppedJobs, (ClientData)hostID, JobCmpRmtID); 3177 if (jnode == NILLNODE) { 3178 if (DEBUG(JOB)) { 3179 Error("Evicting host(%d) not in table", hostID); 3180 } 3181 return; 3182 } 3183 } 3184 job = (Job *) Lst_Datum(jnode); 3185 3186 if (DEBUG(JOB)) { 3187 (void) fprintf(stdout, 3188 "JobFlagForMigration(%d) found job '%s'.\n", hostID, 3189 job->node->name); 3190 (void) fflush(stdout); 3191 } 3192 3193 KILL(job->pid, SIGSTOP); 3194 3195 job->flags |= JOB_REMIGRATE; 3196 } 3197 3198 #endif 3199 3200 /*- 3202 *----------------------------------------------------------------------- 3203 * JobRestartJobs -- 3204 * Tries to restart stopped jobs if there are slots available. 3205 * Note that this tries to restart them regardless of pending errors. 3206 * It's not good to leave stopped jobs lying around! 3207 * 3208 * Results: 3209 * None. 3210 * 3211 * Side Effects: 3212 * Resumes(and possibly migrates) jobs. 3213 * 3214 *----------------------------------------------------------------------- 3215 */ 3216 static void 3217 JobRestartJobs() 3218 { 3219 while (!Lst_IsEmpty(stoppedJobs)) { 3220 if (DEBUG(JOB)) { 3221 (void) fprintf(stdout, "Restarting a stopped job.\n"); 3222 (void) fflush(stdout); 3223 } 3224 JobRestart((Job *)Lst_DeQueue(stoppedJobs)); 3225 } 3226 } 3227 3228 #ifndef RMT_WILL_WATCH 3229 #ifndef USE_SELECT 3230 static void 3231 watchfd(job) 3232 Job *job; 3233 { 3234 int i; 3235 if (job->inPollfd != NULL) 3236 Punt("Watching watched job"); 3237 if (fds == NULL) { 3238 maxfds = JBSTART; 3239 fds = emalloc(sizeof(struct pollfd) * maxfds); 3240 jobfds = emalloc(sizeof(Job **) * maxfds); 3241 3242 fds[0].fd = job_pipe[0]; 3243 fds[0].events = POLLIN; 3244 jobfds[0] = &tokenWaitJob; 3245 tokenWaitJob.inPollfd = &fds[0]; 3246 nfds++; 3247 } else if (nfds == maxfds) { 3248 maxfds *= JBFACTOR; 3249 fds = erealloc(fds, sizeof(struct pollfd) * maxfds); 3250 jobfds = erealloc(jobfds, sizeof(Job **) * maxfds); 3251 for (i = 0; i < nfds; i++) 3252 jobfds[i]->inPollfd = &fds[i]; 3253 } 3254 3255 fds[nfds].fd = job->inPipe; 3256 fds[nfds].events = POLLIN; 3257 jobfds[nfds] = job; 3258 job->inPollfd = &fds[nfds]; 3259 nfds++; 3260 } 3261 3262 static void 3263 clearfd(job) 3264 Job *job; 3265 { 3266 int i; 3267 if (job->inPollfd == NULL) 3268 Punt("Unwatching unwatched job"); 3269 i = job->inPollfd - fds; 3270 nfds--; 3271 /* 3272 * Move last job in table into hole made by dead job. 3273 */ 3274 if (nfds != i) { 3275 fds[i] = fds[nfds]; 3276 jobfds[i] = jobfds[nfds]; 3277 jobfds[i]->inPollfd = &fds[i]; 3278 } 3279 job->inPollfd = NULL; 3280 } 3281 3282 static int 3283 readyfd(job) 3284 Job *job; 3285 { 3286 if (job->inPollfd == NULL) 3287 Punt("Polling unwatched job"); 3288 return (job->inPollfd->revents & POLLIN) != 0; 3289 } 3290 #endif 3291 #endif 3292 3293 /*- 3294 *----------------------------------------------------------------------- 3295 * JobTokenAdd -- 3296 * Put a token into the job pipe so that some make process can start 3297 * another job. 3298 * 3299 * Side Effects: 3300 * Allows more build jobs to be spawned somewhere. 3301 * 3302 *----------------------------------------------------------------------- 3303 */ 3304 3305 static void 3306 JobTokenAdd() 3307 { 3308 3309 if (DEBUG(JOB)) 3310 printf("deposit token\n"); 3311 write(job_pipe[1], "+", 1); 3312 } 3313 3314 /*- 3315 *----------------------------------------------------------------------- 3316 * Job_ServerStartTokenAdd -- 3317 * Prep the job token pipe in the root make process. 3318 * 3319 *----------------------------------------------------------------------- 3320 */ 3321 3322 void Job_ServerStart(maxproc) 3323 int maxproc; 3324 { 3325 int i, flags; 3326 char jobarg[64]; 3327 3328 if (pipe(job_pipe) < 0) 3329 Fatal ("error in pipe: %s", strerror(errno)); 3330 3331 /* 3332 * We mark the input side of the pipe non-blocking; we poll(2) the 3333 * pipe when we're waiting for a job token, but we might lose the 3334 * race for the token when a new one becomes available, so the read 3335 * from the pipe should not block. 3336 */ 3337 flags = fcntl(job_pipe[0], F_GETFL, 0); 3338 flags |= O_NONBLOCK; 3339 fcntl(job_pipe[0], F_SETFL, flags); 3340 3341 /* 3342 * Mark job pipes as close-on-exec. 3343 * Note that we will clear this when executing submakes. 3344 */ 3345 fcntl(job_pipe[0], F_SETFD, 1); 3346 fcntl(job_pipe[1], F_SETFD, 1); 3347 3348 snprintf(jobarg, sizeof(jobarg), "%d,%d", job_pipe[0], job_pipe[1]); 3349 3350 Var_Append(MAKEFLAGS, "-J", VAR_GLOBAL); 3351 Var_Append(MAKEFLAGS, jobarg, VAR_GLOBAL); 3352 3353 /* 3354 * Preload job_pipe with one token per job, save the one 3355 * "extra" token for the primary job. 3356 * 3357 * XXX should clip maxJobs against PIPE_BUF -- if maxJobs is 3358 * larger than the write buffer size of the pipe, we will 3359 * deadlock here. 3360 */ 3361 for (i=1; i < maxproc; i++) 3362 JobTokenAdd(); 3363 } 3364 3365 /* 3366 * this tracks the number of tokens currently "out" to build jobs. 3367 */ 3368 int jobTokensRunning = 0; 3369 int jobTokensFree = 0; 3370 /*- 3371 *----------------------------------------------------------------------- 3372 * Job_TokenReturn -- 3373 * Return a withdrawn token to the pool. 3374 * 3375 *----------------------------------------------------------------------- 3376 */ 3377 3378 void 3379 Job_TokenReturn() 3380 { 3381 jobTokensRunning--; 3382 if (jobTokensRunning < 0) 3383 Punt("token botch"); 3384 if (jobTokensRunning) 3385 jobTokensFree++; 3386 } 3387 3388 /*- 3389 *----------------------------------------------------------------------- 3390 * Job_TokenWithdraw -- 3391 * Attempt to withdraw a token from the pool. 3392 * 3393 * Results: 3394 * Returns TRUE if a token was withdrawn, and FALSE if the pool 3395 * is currently empty. 3396 * 3397 * Side Effects: 3398 * If pool is empty, set wantToken so that we wake up 3399 * when a token is released. 3400 * 3401 *----------------------------------------------------------------------- 3402 */ 3403 3404 3405 Boolean 3406 Job_TokenWithdraw() 3407 { 3408 char tok; 3409 int count; 3410 3411 if (aborting) 3412 return FALSE; 3413 3414 if (jobTokensRunning == 0) { 3415 if (DEBUG(JOB)) 3416 printf("first one's free\n"); 3417 jobTokensRunning++; 3418 wantToken = FALSE; 3419 return TRUE; 3420 } 3421 if (jobTokensFree > 0) { 3422 jobTokensFree--; 3423 jobTokensRunning++; 3424 wantToken = FALSE; 3425 return TRUE; 3426 } 3427 count = read(job_pipe[0], &tok, 1); 3428 if (count == 0) 3429 Fatal("eof on job pipe!"); 3430 else if (count < 0) { 3431 if (errno != EAGAIN) { 3432 Fatal("job pipe read: %s", strerror(errno)); 3433 } 3434 if (DEBUG(JOB)) 3435 printf("blocked for token\n"); 3436 wantToken = TRUE; 3437 return FALSE; 3438 } 3439 wantToken = FALSE; 3440 jobTokensRunning++; 3441 if (DEBUG(JOB)) 3442 printf("withdrew token\n"); 3443 return TRUE; 3444 } 3445 3446 /*- 3447 *----------------------------------------------------------------------- 3448 * Job_TokenFlush -- 3449 * Return free tokens to the pool. 3450 * 3451 *----------------------------------------------------------------------- 3452 */ 3453 3454 void 3455 Job_TokenFlush() 3456 { 3457 if (compatMake) return; 3458 3459 while (jobTokensFree > 0) { 3460 JobTokenAdd(); 3461 jobTokensFree--; 3462 } 3463 } 3464 3465
Indexes created Fri Oct 31 11:10:07 GMT 2025