1 /* 2 * Copyright (c) 1988, 1989, 1990, 1993 3 * The Regents of the University of California. All rights reserved. 4 * Copyright (c) 1989 by Berkeley Softworks 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Adam de Boor. 9 * 10 * %sccs.include.redist.c% 11 */ 12 13 #ifndef lint 14 static char sccsid[] = "@(#)job.c 8.1 (Berkeley) 06/06/93"; 15 #endif /* not lint */ 16 17 /*- 18 * job.c -- 19 * handle the creation etc. of our child processes. 20 * 21 * Interface: 22 * Job_Make Start the creation of the given target. 23 * 24 * Job_CatchChildren Check for and handle the termination of any 25 * children. This must be called reasonably 26 * frequently to keep the whole make going at 27 * a decent clip, since job table entries aren't 28 * removed until their process is caught this way. 29 * Its single argument is TRUE if the function 30 * should block waiting for a child to terminate. 31 * 32 * Job_CatchOutput Print any output our children have produced. 33 * Should also be called fairly frequently to 34 * keep the user informed of what's going on. 35 * If no output is waiting, it will block for 36 * a time given by the SEL_* constants, below, 37 * or until output is ready. 38 * 39 * Job_Init Called to intialize this module. in addition, 40 * any commands attached to the .BEGIN target 41 * are executed before this function returns. 42 * Hence, the makefile must have been parsed 43 * before this function is called. 44 * 45 * Job_Full Return TRUE if the job table is filled. 46 * 47 * Job_Empty Return TRUE if the job table is completely 48 * empty. 49 * 50 * Job_ParseShell Given the line following a .SHELL target, parse 51 * the line as a shell specification. Returns 52 * FAILURE if the spec was incorrect. 53 * 54 * Job_End Perform any final processing which needs doing. 55 * This includes the execution of any commands 56 * which have been/were attached to the .END 57 * target. It should only be called when the 58 * job table is empty. 59 * 60 * Job_AbortAll Abort all currently running jobs. It doesn't 61 * handle output or do anything for the jobs, 62 * just kills them. It should only be called in 63 * an emergency, as it were. 64 * 65 * Job_CheckCommands Verify that the commands for a target are 66 * ok. Provide them if necessary and possible. 67 * 68 * Job_Touch Update a target without really updating it. 69 * 70 * Job_Wait Wait for all currently-running jobs to finish. 71 */ 72 73 #include <sys/types.h> 74 #include <sys/stat.h> 75 #include <sys/file.h> 76 #include <sys/time.h> 77 #include <sys/wait.h> 78 79 #include <errno.h> 80 #include <fcntl.h> 81 #include <signal.h> 82 #include <stdio.h> 83 #include <string.h> 84 85 #include "make.h" 86 #include "hash.h" 87 #include "dir.h" 88 #include "job.h" 89 #include "pathnames.h" 90 91 extern int errno; 92 93 /* 94 * error handling variables 95 */ 96 static int errors = 0; /* number of errors reported */ 97 static int aborting = 0; /* why is the make aborting? */ 98 #define ABORT_ERROR 1 /* Because of an error */ 99 #define ABORT_INTERRUPT 2 /* Because it was interrupted */ 100 #define ABORT_WAIT 3 /* Waiting for jobs to finish */ 101 102 103 /* 104 * post-make command processing. The node postCommands is really just the 105 * .END target but we keep it around to avoid having to search for it 106 * all the time. 107 */ 108 static GNode *postCommands; /* node containing commands to execute when 109 * everything else is done */ 110 static int numCommands; /* The number of commands actually printed 111 * for a target. Should this number be 112 * 0, no shell will be executed. */ 113 114 115 /* 116 * Return values from JobStart. 117 */ 118 #define JOB_RUNNING 0 /* Job is running */ 119 #define JOB_ERROR 1 /* Error in starting the job */ 120 #define JOB_FINISHED 2 /* The job is already finished */ 121 #define JOB_STOPPED 3 /* The job is stopped */ 122 123 /* 124 * tfile is the name of a file into which all shell commands are put. It is 125 * used over by removing it before the child shell is executed. The XXXXX in 126 * the string are replaced by the pid of the make process in a 5-character 127 * field with leading zeroes. 128 */ 129 static char tfile[] = TMPPAT; 130 131 132 /* 133 * Descriptions for various shells. 134 */ 135 static Shell shells[] = { 136 /* 137 * CSH description. The csh can do echo control by playing 138 * with the setting of the 'echo' shell variable. Sadly, 139 * however, it is unable to do error control nicely. 140 */ 141 { 142 "csh", 143 TRUE, "unset verbose", "set verbose", "unset verbose", 10, 144 FALSE, "echo \"%s\"\n", "csh -c \"%s || exit 0\"", 145 "v", "e", 146 }, 147 /* 148 * SH description. Echo control is also possible and, under 149 * sun UNIX anyway, one can even control error checking. 150 */ 151 { 152 "sh", 153 TRUE, "set -", "set -v", "set -", 5, 154 FALSE, "echo \"%s\"\n", "sh -c '%s || exit 0'\n", 155 "v", "e", 156 }, 157 /* 158 * UNKNOWN. 159 */ 160 { 161 (char *)0, 162 FALSE, (char *)0, (char *)0, (char *)0, 0, 163 FALSE, (char *)0, (char *)0, 164 (char *)0, (char *)0, 165 } 166 }; 167 static Shell *commandShell = &shells[DEFSHELL];/* this is the shell to 168 * which we pass all 169 * commands in the Makefile. 170 * It is set by the 171 * Job_ParseShell function */ 172 static char *shellPath = (char *) NULL, /* full pathname of 173 * executable image */ 174 *shellName; /* last component of shell */ 175 176 177 static int maxJobs; /* The most children we can run at once */ 178 static int maxLocal; /* The most local ones we can have */ 179 static int nJobs; /* The number of children currently running */ 180 static int nLocal; /* The number of local children */ 181 static Lst jobs; /* The structures that describe them */ 182 static Boolean jobFull; /* Flag to tell when the job table is full. It 183 * is set TRUE when (1) the total number of 184 * running jobs equals the maximum allowed or 185 * (2) a job can only be run locally, but 186 * nLocal equals maxLocal */ 187 #ifndef RMT_WILL_WATCH 188 static fd_set outputs; /* Set of descriptors of pipes connected to 189 * the output channels of children */ 190 #endif 191 192 static GNode *lastNode; /* The node for which output was most recently 193 * produced. */ 194 static char *targFmt; /* Format string to use to head output from a 195 * job when it's not the most-recent job heard 196 * from */ 197 #define TARG_FMT "--- %s ---\n" /* Default format */ 198 199 /* 200 * When JobStart attempts to run a job remotely but can't, and isn't allowed 201 * to run the job locally, or when Job_CatchChildren detects a job that has 202 * been migrated home, the job is placed on the stoppedJobs queue to be run 203 * when the next job finishes. 204 */ 205 static Lst stoppedJobs; /* Lst of Job structures describing 206 * jobs that were stopped due to concurrency 207 * limits or migration home */ 208 209 210 #if defined(USE_PGRP) && defined(SYSV) 211 #define KILL(pid,sig) killpg (-(pid),(sig)) 212 #else 213 # if defined(USE_PGRP) 214 #define KILL(pid,sig) killpg ((pid),(sig)) 215 # else 216 #define KILL(pid,sig) kill ((pid),(sig)) 217 # endif 218 #endif 219 220 static int JobCondPassSig __P((Job *, int)); 221 static void JobPassSig __P((int)); 222 static int JobCmpPid __P((Job *, int)); 223 static int JobPrintCommand __P((char *, Job *)); 224 static int JobSaveCommand __P((char *, GNode *)); 225 static void JobFinish __P((Job *, union wait)); 226 static void JobExec __P((Job *, char **)); 227 static void JobMakeArgv __P((Job *, char **)); 228 static void JobRestart __P((Job *)); 229 static int JobStart __P((GNode *, int, Job *)); 230 static void JobDoOutput __P((Job *, Boolean)); 231 static Shell *JobMatchShell __P((char *)); 232 static void JobInterrupt __P((int)); 233 234 /*- 235 *----------------------------------------------------------------------- 236 * JobCondPassSig -- 237 * Pass a signal to a job if the job is remote or if USE_PGRP 238 * is defined. 239 * 240 * Results: 241 * === 0 242 * 243 * Side Effects: 244 * None, except the job may bite it. 245 * 246 *----------------------------------------------------------------------- 247 */ 248 static int 249 JobCondPassSig(job, signo) 250 Job *job; /* Job to biff */ 251 int signo; /* Signal to send it */ 252 { 253 #ifdef RMT_WANTS_SIGNALS 254 if (job->flags & JOB_REMOTE) { 255 (void)Rmt_Signal(job, signo); 256 } else { 257 KILL(job->pid, signo); 258 } 259 #else 260 /* 261 * Assume that sending the signal to job->pid will signal any remote 262 * job as well. 263 */ 264 KILL(job->pid, signo); 265 #endif 266 return(0); 267 } 268 269 /*- 270 *----------------------------------------------------------------------- 271 * JobPassSig -- 272 * Pass a signal on to all remote jobs and to all local jobs if 273 * USE_PGRP is defined, then die ourselves. 274 * 275 * Results: 276 * None. 277 * 278 * Side Effects: 279 * We die by the same signal. 280 * 281 *----------------------------------------------------------------------- 282 */ 283 static void 284 JobPassSig(signo) 285 int signo; /* The signal number we've received */ 286 { 287 int mask; 288 289 Lst_ForEach(jobs, JobCondPassSig, (ClientData)signo); 290 291 /* 292 * Deal with proper cleanup based on the signal received. We only run 293 * the .INTERRUPT target if the signal was in fact an interrupt. The other 294 * three termination signals are more of a "get out *now*" command. 295 */ 296 if (signo == SIGINT) { 297 JobInterrupt(TRUE); 298 } else if ((signo == SIGHUP) || (signo == SIGTERM) || (signo == SIGQUIT)) { 299 JobInterrupt(FALSE); 300 } 301 302 /* 303 * Leave gracefully if SIGQUIT, rather than core dumping. 304 */ 305 if (signo == SIGQUIT) { 306 Finish(0); 307 } 308 309 /* 310 * Send ourselves the signal now we've given the message to everyone else. 311 * Note we block everything else possible while we're getting the signal. 312 * This ensures that all our jobs get continued when we wake up before 313 * we take any other signal. 314 */ 315 mask = sigblock(0); 316 (void) sigsetmask(~0 & ~(1 << (signo-1))); 317 signal(signo, SIG_DFL); 318 319 kill(getpid(), signo); 320 321 Lst_ForEach(jobs, JobCondPassSig, (ClientData)SIGCONT); 322 323 sigsetmask(mask); 324 signal(signo, JobPassSig); 325 326 } 327 328 /*- 329 *----------------------------------------------------------------------- 330 * JobCmpPid -- 331 * Compare the pid of the job with the given pid and return 0 if they 332 * are equal. This function is called from Job_CatchChildren via 333 * Lst_Find to find the job descriptor of the finished job. 334 * 335 * Results: 336 * 0 if the pid's match 337 * 338 * Side Effects: 339 * None 340 *----------------------------------------------------------------------- 341 */ 342 static int 343 JobCmpPid (job, pid) 344 int pid; /* process id desired */ 345 Job *job; /* job to examine */ 346 { 347 return (pid - job->pid); 348 } 349 350 /*- 351 *----------------------------------------------------------------------- 352 * JobPrintCommand -- 353 * Put out another command for the given job. If the command starts 354 * with an @ or a - we process it specially. In the former case, 355 * so long as the -s and -n flags weren't given to make, we stick 356 * a shell-specific echoOff command in the script. In the latter, 357 * we ignore errors for the entire job, unless the shell has error 358 * control. 359 * If the command is just "..." we take all future commands for this 360 * job to be commands to be executed once the entire graph has been 361 * made and return non-zero to signal that the end of the commands 362 * was reached. These commands are later attached to the postCommands 363 * node and executed by Job_End when all things are done. 364 * This function is called from JobStart via Lst_ForEach. 365 * 366 * Results: 367 * Always 0, unless the command was "..." 368 * 369 * Side Effects: 370 * If the command begins with a '-' and the shell has no error control, 371 * the JOB_IGNERR flag is set in the job descriptor. 372 * If the command is "..." and we're not ignoring such things, 373 * tailCmds is set to the successor node of the cmd. 374 * numCommands is incremented if the command is actually printed. 375 *----------------------------------------------------------------------- 376 */ 377 static int 378 JobPrintCommand (cmd, job) 379 char *cmd; /* command string to print */ 380 Job *job; /* job for which to print it */ 381 { 382 Boolean noSpecials; /* true if we shouldn't worry about 383 * inserting special commands into 384 * the input stream. */ 385 Boolean shutUp = FALSE; /* true if we put a no echo command 386 * into the command file */ 387 Boolean errOff = FALSE; /* true if we turned error checking 388 * off before printing the command 389 * and need to turn it back on */ 390 char *cmdTemplate; /* Template to use when printing the 391 * command */ 392 char *cmdStart; /* Start of expanded command */ 393 LstNode cmdNode; /* Node for replacing the command */ 394 395 noSpecials = (noExecute && ! (job->node->type & OP_MAKE)); 396 397 if (strcmp (cmd, "...") == 0) { 398 job->node->type |= OP_SAVE_CMDS; 399 if ((job->flags & JOB_IGNDOTS) == 0) { 400 job->tailCmds = Lst_Succ (Lst_Member (job->node->commands, 401 (ClientData)cmd)); 402 return (1); 403 } 404 return (0); 405 } 406 407 #define DBPRINTF(fmt, arg) if (DEBUG(JOB)) printf (fmt, arg); fprintf (job->cmdFILE, fmt, arg) 408 409 numCommands += 1; 410 411 /* 412 * For debugging, we replace each command with the result of expanding 413 * the variables in the command. 414 */ 415 cmdNode = Lst_Member (job->node->commands, (ClientData)cmd); 416 cmdStart = cmd = Var_Subst (NULL, cmd, job->node, FALSE); 417 Lst_Replace (cmdNode, (ClientData)cmdStart); 418 419 cmdTemplate = "%s\n"; 420 421 /* 422 * Check for leading @' and -'s to control echoing and error checking. 423 */ 424 while (*cmd == '@' || *cmd == '-') { 425 if (*cmd == '@') { 426 shutUp = TRUE; 427 } else { 428 errOff = TRUE; 429 } 430 cmd++; 431 } 432 433 if (shutUp) { 434 if (! (job->flags & JOB_SILENT) && !noSpecials && 435 commandShell->hasEchoCtl) { 436 DBPRINTF ("%s\n", commandShell->echoOff); 437 } else { 438 shutUp = FALSE; 439 } 440 } 441 442 if (errOff) { 443 if ( ! (job->flags & JOB_IGNERR) && !noSpecials) { 444 if (commandShell->hasErrCtl) { 445 /* 446 * we don't want the error-control commands showing 447 * up either, so we turn off echoing while executing 448 * them. We could put another field in the shell 449 * structure to tell JobDoOutput to look for this 450 * string too, but why make it any more complex than 451 * it already is? 452 */ 453 if (! (job->flags & JOB_SILENT) && !shutUp && 454 commandShell->hasEchoCtl) { 455 DBPRINTF ("%s\n", commandShell->echoOff); 456 DBPRINTF ("%s\n", commandShell->ignErr); 457 DBPRINTF ("%s\n", commandShell->echoOn); 458 } else { 459 DBPRINTF ("%s\n", commandShell->ignErr); 460 } 461 } else if (commandShell->ignErr && 462 (*commandShell->ignErr != '\0')) 463 { 464 /* 465 * The shell has no error control, so we need to be 466 * weird to get it to ignore any errors from the command. 467 * If echoing is turned on, we turn it off and use the 468 * errCheck template to echo the command. Leave echoing 469 * off so the user doesn't see the weirdness we go through 470 * to ignore errors. Set cmdTemplate to use the weirdness 471 * instead of the simple "%s\n" template. 472 */ 473 if (! (job->flags & JOB_SILENT) && !shutUp && 474 commandShell->hasEchoCtl) { 475 DBPRINTF ("%s\n", commandShell->echoOff); 476 DBPRINTF (commandShell->errCheck, cmd); 477 shutUp = TRUE; 478 } 479 cmdTemplate = commandShell->ignErr; 480 /* 481 * The error ignoration (hee hee) is already taken care 482 * of by the ignErr template, so pretend error checking 483 * is still on. 484 */ 485 errOff = FALSE; 486 } else { 487 errOff = FALSE; 488 } 489 } else { 490 errOff = FALSE; 491 } 492 } 493 494 DBPRINTF (cmdTemplate, cmd); 495 496 if (errOff) { 497 /* 498 * If echoing is already off, there's no point in issuing the 499 * echoOff command. Otherwise we issue it and pretend it was on 500 * for the whole command... 501 */ 502 if (!shutUp && !(job->flags & JOB_SILENT) && commandShell->hasEchoCtl){ 503 DBPRINTF ("%s\n", commandShell->echoOff); 504 shutUp = TRUE; 505 } 506 DBPRINTF ("%s\n", commandShell->errCheck); 507 } 508 if (shutUp) { 509 DBPRINTF ("%s\n", commandShell->echoOn); 510 } 511 return (0); 512 } 513 514 /*- 515 *----------------------------------------------------------------------- 516 * JobSaveCommand -- 517 * Save a command to be executed when everything else is done. 518 * Callback function for JobFinish... 519 * 520 * Results: 521 * Always returns 0 522 * 523 * Side Effects: 524 * The command is tacked onto the end of postCommands's commands list. 525 * 526 *----------------------------------------------------------------------- 527 */ 528 static int 529 JobSaveCommand (cmd, gn) 530 char *cmd; 531 GNode *gn; 532 { 533 cmd = Var_Subst (NULL, cmd, gn, FALSE); 534 (void)Lst_AtEnd (postCommands->commands, (ClientData)cmd); 535 return (0); 536 } 537 538 /*- 539 *----------------------------------------------------------------------- 540 * JobFinish -- 541 * Do final processing for the given job including updating 542 * parents and starting new jobs as available/necessary. Note 543 * that we pay no attention to the JOB_IGNERR flag here. 544 * This is because when we're called because of a noexecute flag 545 * or something, jstat.w_status is 0 and when called from 546 * Job_CatchChildren, the status is zeroed if it s/b ignored. 547 * 548 * Results: 549 * None 550 * 551 * Side Effects: 552 * Some nodes may be put on the toBeMade queue. 553 * Final commands for the job are placed on postCommands. 554 * 555 * If we got an error and are aborting (aborting == ABORT_ERROR) and 556 * the job list is now empty, we are done for the day. 557 * If we recognized an error (errors !=0), we set the aborting flag 558 * to ABORT_ERROR so no more jobs will be started. 559 *----------------------------------------------------------------------- 560 */ 561 /*ARGSUSED*/ 562 static void 563 JobFinish (job, status) 564 Job *job; /* job to finish */ 565 union wait status; /* sub-why job went away */ 566 { 567 Boolean done; 568 569 if ((WIFEXITED(status) && 570 (((status.w_retcode != 0) && !(job->flags & JOB_IGNERR)))) || 571 (WIFSIGNALED(status) && (status.w_termsig != SIGCONT))) 572 { 573 /* 574 * If it exited non-zero and either we're doing things our 575 * way or we're not ignoring errors, the job is finished. 576 * Similarly, if the shell died because of a signal 577 * the job is also finished. In these 578 * cases, finish out the job's output before printing the exit 579 * status... 580 */ 581 if (usePipes) { 582 #ifdef RMT_WILL_WATCH 583 Rmt_Ignore(job->inPipe); 584 #else 585 FD_CLR(job->inPipe, &outputs); 586 #endif /* RMT_WILL_WATCH */ 587 if (job->outPipe != job->inPipe) { 588 (void)close (job->outPipe); 589 } 590 JobDoOutput (job, TRUE); 591 (void)close (job->inPipe); 592 } else { 593 (void)close (job->outFd); 594 JobDoOutput (job, TRUE); 595 } 596 597 if (job->cmdFILE != NULL && job->cmdFILE != stdout) { 598 fclose(job->cmdFILE); 599 } 600 done = TRUE; 601 } else if (WIFEXITED(status) && status.w_retcode != 0) { 602 /* 603 * Deal with ignored errors in -B mode. We need to print a message 604 * telling of the ignored error as well as setting status.w_status 605 * to 0 so the next command gets run. To do this, we set done to be 606 * TRUE if in -B mode and the job exited non-zero. Note we don't 607 * want to close down any of the streams until we know we're at the 608 * end. 609 */ 610 done = TRUE; 611 } else { 612 /* 613 * No need to close things down or anything. 614 */ 615 done = FALSE; 616 } 617 618 if (done || 619 WIFSTOPPED(status) || 620 (WIFSIGNALED(status) && (status.w_termsig == SIGCONT)) || 621 DEBUG(JOB)) 622 { 623 FILE *out; 624 625 if (!usePipes && (job->flags & JOB_IGNERR)) { 626 /* 627 * If output is going to a file and this job is ignoring 628 * errors, arrange to have the exit status sent to the 629 * output file as well. 630 */ 631 out = fdopen (job->outFd, "w"); 632 } else { 633 out = stdout; 634 } 635 636 if (WIFEXITED(status)) { 637 if (status.w_retcode != 0) { 638 if (usePipes && job->node != lastNode) { 639 fprintf (out, targFmt, job->node->name); 640 lastNode = job->node; 641 } 642 fprintf (out, "*** Error code %d%s\n", status.w_retcode, 643 (job->flags & JOB_IGNERR) ? " (ignored)" : ""); 644 645 if (job->flags & JOB_IGNERR) { 646 status.w_status = 0; 647 } 648 } else if (DEBUG(JOB)) { 649 if (usePipes && job->node != lastNode) { 650 fprintf (out, targFmt, job->node->name); 651 lastNode = job->node; 652 } 653 fprintf (out, "*** Completed successfully\n"); 654 } 655 } else if (WIFSTOPPED(status)) { 656 if (usePipes && job->node != lastNode) { 657 fprintf (out, targFmt, job->node->name); 658 lastNode = job->node; 659 } 660 if (! (job->flags & JOB_REMIGRATE)) { 661 fprintf (out, "*** Stopped -- signal %d\n", status.w_stopsig); 662 } 663 job->flags |= JOB_RESUME; 664 (void)Lst_AtEnd(stoppedJobs, (ClientData)job); 665 fflush(out); 666 return; 667 } else if (status.w_termsig == SIGCONT) { 668 /* 669 * If the beastie has continued, shift the Job from the stopped 670 * list to the running one (or re-stop it if concurrency is 671 * exceeded) and go and get another child. 672 */ 673 if (job->flags & (JOB_RESUME|JOB_REMIGRATE|JOB_RESTART)) { 674 if (usePipes && job->node != lastNode) { 675 fprintf (out, targFmt, job->node->name); 676 lastNode = job->node; 677 } 678 fprintf (out, "*** Continued\n"); 679 } 680 if (! (job->flags & JOB_CONTINUING)) { 681 JobRestart(job); 682 } else { 683 Lst_AtEnd(jobs, (ClientData)job); 684 nJobs += 1; 685 if (! (job->flags & JOB_REMOTE)) { 686 nLocal += 1; 687 } 688 if (nJobs == maxJobs) { 689 jobFull = TRUE; 690 if (DEBUG(JOB)) { 691 printf("Job queue is full.\n"); 692 } 693 } 694 } 695 fflush(out); 696 return; 697 } else { 698 if (usePipes && job->node != lastNode) { 699 fprintf (out, targFmt, job->node->name); 700 lastNode = job->node; 701 } 702 fprintf (out, "*** Signal %d\n", status.w_termsig); 703 } 704 705 fflush (out); 706 } 707 708 /* 709 * Now handle the -B-mode stuff. If the beast still isn't finished, 710 * try and restart the job on the next command. If JobStart says it's 711 * ok, it's ok. If there's an error, this puppy is done. 712 */ 713 if ((status.w_status == 0) && 714 !Lst_IsAtEnd (job->node->commands)) 715 { 716 switch (JobStart (job->node, 717 job->flags & JOB_IGNDOTS, 718 job)) 719 { 720 case JOB_RUNNING: 721 done = FALSE; 722 break; 723 case JOB_ERROR: 724 done = TRUE; 725 status.w_retcode = 1; 726 break; 727 case JOB_FINISHED: 728 /* 729 * If we got back a JOB_FINISHED code, JobStart has already 730 * called Make_Update and freed the job descriptor. We set 731 * done to false here to avoid fake cycles and double frees. 732 * JobStart needs to do the update so we can proceed up the 733 * graph when given the -n flag.. 734 */ 735 done = FALSE; 736 break; 737 } 738 } else { 739 done = TRUE; 740 } 741 742 743 if (done && 744 (aborting != ABORT_ERROR) && 745 (aborting != ABORT_INTERRUPT) && 746 (status.w_status == 0)) 747 { 748 /* 749 * As long as we aren't aborting and the job didn't return a non-zero 750 * status that we shouldn't ignore, we call Make_Update to update 751 * the parents. In addition, any saved commands for the node are placed 752 * on the .END target. 753 */ 754 if (job->tailCmds != NILLNODE) { 755 Lst_ForEachFrom (job->node->commands, job->tailCmds, 756 JobSaveCommand, 757 (ClientData)job->node); 758 } 759 job->node->made = MADE; 760 Make_Update (job->node); 761 free((Address)job); 762 } else if (status.w_status) { 763 errors += 1; 764 free((Address)job); 765 } 766 767 while (!errors && !jobFull && !Lst_IsEmpty(stoppedJobs)) { 768 JobRestart((Job *)Lst_DeQueue(stoppedJobs)); 769 } 770 771 /* 772 * Set aborting if any error. 773 */ 774 if (errors && !keepgoing && (aborting != ABORT_INTERRUPT)) { 775 /* 776 * If we found any errors in this batch of children and the -k flag 777 * wasn't given, we set the aborting flag so no more jobs get 778 * started. 779 */ 780 aborting = ABORT_ERROR; 781 } 782 783 if ((aborting == ABORT_ERROR) && Job_Empty()) { 784 /* 785 * If we are aborting and the job table is now empty, we finish. 786 */ 787 (void) unlink (tfile); 788 Finish (errors); 789 } 790 } 791 792 /*- 793 *----------------------------------------------------------------------- 794 * Job_Touch -- 795 * Touch the given target. Called by JobStart when the -t flag was 796 * given 797 * 798 * Results: 799 * None 800 * 801 * Side Effects: 802 * The data modification of the file is changed. In addition, if the 803 * file did not exist, it is created. 804 *----------------------------------------------------------------------- 805 */ 806 void 807 Job_Touch (gn, silent) 808 GNode *gn; /* the node of the file to touch */ 809 Boolean silent; /* TRUE if should not print messages */ 810 { 811 int streamID; /* ID of stream opened to do the touch */ 812 struct timeval times[2]; /* Times for utimes() call */ 813 814 if (gn->type & (OP_JOIN|OP_USE|OP_EXEC|OP_OPTIONAL)) { 815 /* 816 * .JOIN, .USE, .ZEROTIME and .OPTIONAL targets are "virtual" targets 817 * and, as such, shouldn't really be created. 818 */ 819 return; 820 } 821 822 if (!silent) { 823 printf ("touch %s\n", gn->name); 824 } 825 826 if (noExecute) { 827 return; 828 } 829 830 if (gn->type & OP_ARCHV) { 831 Arch_Touch (gn); 832 } else if (gn->type & OP_LIB) { 833 Arch_TouchLib (gn); 834 } else { 835 char *file = gn->path ? gn->path : gn->name; 836 837 times[0].tv_sec = times[1].tv_sec = now; 838 times[0].tv_usec = times[1].tv_usec = 0; 839 if (utimes(file, times) < 0){ 840 streamID = open (file, O_RDWR | O_CREAT, 0666); 841 842 if (streamID >= 0) { 843 char c; 844 845 /* 846 * Read and write a byte to the file to change the 847 * modification time, then close the file. 848 */ 849 if (read(streamID, &c, 1) == 1) { 850 lseek(streamID, 0L, L_SET); 851 write(streamID, &c, 1); 852 } 853 854 (void)close (streamID); 855 } else 856 printf("*** couldn't touch %s: %s", file, strerror(errno)); 857 } 858 } 859 } 860 861 /*- 862 *----------------------------------------------------------------------- 863 * Job_CheckCommands -- 864 * Make sure the given node has all the commands it needs. 865 * 866 * Results: 867 * TRUE if the commands list is/was ok. 868 * 869 * Side Effects: 870 * The node will have commands from the .DEFAULT rule added to it 871 * if it needs them. 872 *----------------------------------------------------------------------- 873 */ 874 Boolean 875 Job_CheckCommands (gn, abortProc) 876 GNode *gn; /* The target whose commands need 877 * verifying */ 878 void (*abortProc) __P((const char *, ...)); 879 /* Function to abort with message */ 880 { 881 if (OP_NOP(gn->type) && Lst_IsEmpty (gn->commands) && 882 (gn->type & OP_LIB) == 0) { 883 /* 884 * No commands. Look for .DEFAULT rule from which we might infer 885 * commands 886 */ 887 if ((DEFAULT != NILGNODE) && !Lst_IsEmpty(DEFAULT->commands)) { 888 /* 889 * Make only looks for a .DEFAULT if the node was never the 890 * target of an operator, so that's what we do too. If 891 * a .DEFAULT was given, we substitute its commands for gn's 892 * commands and set the IMPSRC variable to be the target's name 893 * The DEFAULT node acts like a transformation rule, in that 894 * gn also inherits any attributes or sources attached to 895 * .DEFAULT itself. 896 */ 897 Make_HandleUse(DEFAULT, gn); 898 Var_Set (IMPSRC, Var_Value (TARGET, gn), gn); 899 } else if (Dir_MTime (gn) == 0) { 900 /* 901 * The node wasn't the target of an operator we have no .DEFAULT 902 * rule to go on and the target doesn't already exist. There's 903 * nothing more we can do for this branch. If the -k flag wasn't 904 * given, we stop in our tracks, otherwise we just don't update 905 * this node's parents so they never get examined. 906 */ 907 if (gn->type & OP_OPTIONAL) { 908 printf ("make: don't know how to make %s (ignored)\n", 909 gn->name); 910 } else if (keepgoing) { 911 printf ("make: don't know how to make %s (continuing)\n", 912 gn->name); 913 return (FALSE); 914 } else { 915 (*abortProc) ("make: don't know how to make %s. Stop", 916 gn->name); 917 return(FALSE); 918 } 919 } 920 } 921 return (TRUE); 922 } 923 #ifdef RMT_WILL_WATCH 924 /*- 925 *----------------------------------------------------------------------- 926 * JobLocalInput -- 927 * Handle a pipe becoming readable. Callback function for Rmt_Watch 928 * 929 * Results: 930 * None 931 * 932 * Side Effects: 933 * JobDoOutput is called. 934 * 935 *----------------------------------------------------------------------- 936 */ 937 /*ARGSUSED*/ 938 static void 939 JobLocalInput(stream, job) 940 int stream; /* Stream that's ready (ignored) */ 941 Job *job; /* Job to which the stream belongs */ 942 { 943 JobDoOutput(job, FALSE); 944 } 945 #endif /* RMT_WILL_WATCH */ 946 947 /*- 948 *----------------------------------------------------------------------- 949 * JobExec -- 950 * Execute the shell for the given job. Called from JobStart and 951 * JobRestart. 952 * 953 * Results: 954 * None. 955 * 956 * Side Effects: 957 * A shell is executed, outputs is altered and the Job structure added 958 * to the job table. 959 * 960 *----------------------------------------------------------------------- 961 */ 962 static void 963 JobExec(job, argv) 964 Job *job; /* Job to execute */ 965 char **argv; 966 { 967 int cpid; /* ID of new child */ 968 969 if (DEBUG(JOB)) { 970 int i; 971 972 printf("Running %s %sly\n", job->node->name, 973 job->flags&JOB_REMOTE?"remote":"local"); 974 printf("\tCommand: "); 975 for (i = 0; argv[i] != (char *)NULL; i++) { 976 printf("%s ", argv[i]); 977 } 978 printf("\n"); 979 } 980 981 /* 982 * Some jobs produce no output and it's disconcerting to have 983 * no feedback of their running (since they produce no output, the 984 * banner with their name in it never appears). This is an attempt to 985 * provide that feedback, even if nothing follows it. 986 */ 987 if ((lastNode != job->node) && (job->flags & JOB_FIRST) && 988 !(job->flags & JOB_SILENT)) 989 { 990 printf(targFmt, job->node->name); 991 lastNode = job->node; 992 } 993 994 #ifdef RMT_NO_EXEC 995 if (job->flags & JOB_REMOTE) { 996 goto jobExecFinish; 997 } 998 #endif /* RMT_NO_EXEC */ 999 1000 if ((cpid = vfork()) == -1) { 1001 Punt ("Cannot fork"); 1002 } else if (cpid == 0) { 1003 1004 /* 1005 * Must duplicate the input stream down to the child's input and 1006 * reset it to the beginning (again). Since the stream was marked 1007 * close-on-exec, we must clear that bit in the new input. 1008 */ 1009 (void) dup2(fileno(job->cmdFILE), 0); 1010 fcntl(0, F_SETFD, 0); 1011 lseek(0, 0, L_SET); 1012 1013 if (usePipes) { 1014 /* 1015 * Set up the child's output to be routed through the pipe 1016 * we've created for it. 1017 */ 1018 (void) dup2 (job->outPipe, 1); 1019 } else { 1020 /* 1021 * We're capturing output in a file, so we duplicate the 1022 * descriptor to the temporary file into the standard 1023 * output. 1024 */ 1025 (void) dup2 (job->outFd, 1); 1026 } 1027 /* 1028 * The output channels are marked close on exec. This bit was 1029 * duplicated by the dup2 (on some systems), so we have to clear 1030 * it before routing the shell's error output to the same place as 1031 * its standard output. 1032 */ 1033 fcntl(1, F_SETFD, 0); 1034 (void) dup2 (1, 2); 1035 1036 #ifdef USE_PGRP 1037 /* 1038 * We want to switch the child into a different process family so 1039 * we can kill it and all its descendants in one fell swoop, 1040 * by killing its process family, but not commit suicide. 1041 */ 1042 1043 (void) setpgrp(0, getpid()); 1044 #endif USE_PGRP 1045 1046 (void) execv (shellPath, argv); 1047 (void) write (2, "Could not execute shell\n", 1048 sizeof ("Could not execute shell")); 1049 _exit (1); 1050 } else { 1051 job->pid = cpid; 1052 1053 if (usePipes && (job->flags & JOB_FIRST) ) { 1054 /* 1055 * The first time a job is run for a node, we set the current 1056 * position in the buffer to the beginning and mark another 1057 * stream to watch in the outputs mask 1058 */ 1059 job->curPos = 0; 1060 1061 #ifdef RMT_WILL_WATCH 1062 Rmt_Watch(job->inPipe, JobLocalInput, job); 1063 #else 1064 FD_SET(job->inPipe, &outputs); 1065 #endif /* RMT_WILL_WATCH */ 1066 } 1067 1068 if (job->flags & JOB_REMOTE) { 1069 job->rmtID = 0; 1070 } else { 1071 nLocal += 1; 1072 /* 1073 * XXX: Used to not happen if CUSTOMS. Why? 1074 */ 1075 if (job->cmdFILE != stdout) { 1076 fclose(job->cmdFILE); 1077 job->cmdFILE = NULL; 1078 } 1079 } 1080 } 1081 1082 #ifdef RMT_NO_EXEC 1083 jobExecFinish: 1084 #endif 1085 /* 1086 * Now the job is actually running, add it to the table. 1087 */ 1088 nJobs += 1; 1089 (void)Lst_AtEnd (jobs, (ClientData)job); 1090 if (nJobs == maxJobs) { 1091 jobFull = TRUE; 1092 } 1093 } 1094 1095 /*- 1096 *----------------------------------------------------------------------- 1097 * JobMakeArgv -- 1098 * Create the argv needed to execute the shell for a given job. 1099 * 1100 * 1101 * Results: 1102 * 1103 * Side Effects: 1104 * 1105 *----------------------------------------------------------------------- 1106 */ 1107 static void 1108 JobMakeArgv(job, argv) 1109 Job *job; 1110 char **argv; 1111 { 1112 int argc; 1113 static char args[10]; /* For merged arguments */ 1114 1115 argv[0] = shellName; 1116 argc = 1; 1117 1118 if ((commandShell->exit && (*commandShell->exit != '-')) || 1119 (commandShell->echo && (*commandShell->echo != '-'))) 1120 { 1121 /* 1122 * At least one of the flags doesn't have a minus before it, so 1123 * merge them together. Have to do this because the *(&(@*#*&#$# 1124 * Bourne shell thinks its second argument is a file to source. 1125 * Grrrr. Note the ten-character limitation on the combined arguments. 1126 */ 1127 (void)sprintf(args, "-%s%s", 1128 ((job->flags & JOB_IGNERR) ? "" : 1129 (commandShell->exit ? commandShell->exit : "")), 1130 ((job->flags & JOB_SILENT) ? "" : 1131 (commandShell->echo ? commandShell->echo : ""))); 1132 1133 if (args[1]) { 1134 argv[argc] = args; 1135 argc++; 1136 } 1137 } else { 1138 if (!(job->flags & JOB_IGNERR) && commandShell->exit) { 1139 argv[argc] = commandShell->exit; 1140 argc++; 1141 } 1142 if (!(job->flags & JOB_SILENT) && commandShell->echo) { 1143 argv[argc] = commandShell->echo; 1144 argc++; 1145 } 1146 } 1147 argv[argc] = (char *)NULL; 1148 } 1149 1150 /*- 1151 *----------------------------------------------------------------------- 1152 * JobRestart -- 1153 * Restart a job that stopped for some reason. 1154 * 1155 * Results: 1156 * None. 1157 * 1158 * Side Effects: 1159 * jobFull will be set if the job couldn't be run. 1160 * 1161 *----------------------------------------------------------------------- 1162 */ 1163 static void 1164 JobRestart(job) 1165 Job *job; /* Job to restart */ 1166 { 1167 if (job->flags & JOB_REMIGRATE) { 1168 if (DEBUG(JOB)) { 1169 printf("Remigrating %x\n", job->pid); 1170 } 1171 if (nLocal != maxLocal) { 1172 /* 1173 * Job cannot be remigrated, but there's room on the local 1174 * machine, so resume the job and note that another 1175 * local job has started. 1176 */ 1177 if (DEBUG(JOB)) { 1178 printf("resuming on local machine\n"); 1179 } 1180 KILL(job->pid, SIGCONT); 1181 nLocal +=1; 1182 job->flags &= ~(JOB_REMIGRATE|JOB_RESUME); 1183 } else { 1184 /* 1185 * Job cannot be restarted. Mark the table as full and 1186 * place the job back on the list of stopped jobs. 1187 */ 1188 if (DEBUG(JOB)) { 1189 printf("holding\n"); 1190 } 1191 (void)Lst_AtFront(stoppedJobs, (ClientData)job); 1192 jobFull = TRUE; 1193 if (DEBUG(JOB)) { 1194 printf("Job queue is full.\n"); 1195 } 1196 return; 1197 } 1198 1199 (void)Lst_AtEnd(jobs, (ClientData)job); 1200 nJobs += 1; 1201 if (nJobs == maxJobs) { 1202 jobFull = TRUE; 1203 if (DEBUG(JOB)) { 1204 printf("Job queue is full.\n"); 1205 } 1206 } 1207 } else if (job->flags & JOB_RESTART) { 1208 /* 1209 * Set up the control arguments to the shell. This is based on the 1210 * flags set earlier for this job. If the JOB_IGNERR flag is clear, 1211 * the 'exit' flag of the commandShell is used to cause it to exit 1212 * upon receiving an error. If the JOB_SILENT flag is clear, the 1213 * 'echo' flag of the commandShell is used to get it to start echoing 1214 * as soon as it starts processing commands. 1215 */ 1216 char *argv[4]; 1217 1218 JobMakeArgv(job, argv); 1219 1220 if (DEBUG(JOB)) { 1221 printf("Restarting %s...", job->node->name); 1222 } 1223 if (((nLocal >= maxLocal) && ! (job->flags & JOB_SPECIAL))) { 1224 /* 1225 * Can't be exported and not allowed to run locally -- put it 1226 * back on the hold queue and mark the table full 1227 */ 1228 if (DEBUG(JOB)) { 1229 printf("holding\n"); 1230 } 1231 (void)Lst_AtFront(stoppedJobs, (ClientData)job); 1232 jobFull = TRUE; 1233 if (DEBUG(JOB)) { 1234 printf("Job queue is full.\n"); 1235 } 1236 return; 1237 } else { 1238 /* 1239 * Job may be run locally. 1240 */ 1241 if (DEBUG(JOB)) { 1242 printf("running locally\n"); 1243 } 1244 job->flags &= ~JOB_REMOTE; 1245 } 1246 JobExec(job, argv); 1247 } else { 1248 /* 1249 * The job has stopped and needs to be restarted. Why it stopped, 1250 * we don't know... 1251 */ 1252 if (DEBUG(JOB)) { 1253 printf("Resuming %s...", job->node->name); 1254 } 1255 if (((job->flags & JOB_REMOTE) || 1256 (nLocal < maxLocal) || 1257 (((job->flags & JOB_SPECIAL)) && 1258 (maxLocal == 0))) && 1259 (nJobs != maxJobs)) 1260 { 1261 /* 1262 * If the job is remote, it's ok to resume it as long as the 1263 * maximum concurrency won't be exceeded. If it's local and 1264 * we haven't reached the local concurrency limit already (or the 1265 * job must be run locally and maxLocal is 0), it's also ok to 1266 * resume it. 1267 */ 1268 Boolean error; 1269 extern int errno; 1270 union wait status; 1271 1272 #ifdef RMT_WANTS_SIGNALS 1273 if (job->flags & JOB_REMOTE) { 1274 error = !Rmt_Signal(job, SIGCONT); 1275 } else 1276 #endif /* RMT_WANTS_SIGNALS */ 1277 error = (KILL(job->pid, SIGCONT) != 0); 1278 1279 if (!error) { 1280 /* 1281 * Make sure the user knows we've continued the beast and 1282 * actually put the thing in the job table. 1283 */ 1284 job->flags |= JOB_CONTINUING; 1285 status.w_termsig = SIGCONT; 1286 JobFinish(job, status); 1287 1288 job->flags &= ~(JOB_RESUME|JOB_CONTINUING); 1289 if (DEBUG(JOB)) { 1290 printf("done\n"); 1291 } 1292 } else { 1293 Error("couldn't resume %s: %s", 1294 job->node->name, strerror(errno)); 1295 status.w_status = 0; 1296 status.w_retcode = 1; 1297 JobFinish(job, status); 1298 } 1299 } else { 1300 /* 1301 * Job cannot be restarted. Mark the table as full and 1302 * place the job back on the list of stopped jobs. 1303 */ 1304 if (DEBUG(JOB)) { 1305 printf("table full\n"); 1306 } 1307 (void)Lst_AtFront(stoppedJobs, (ClientData)job); 1308 jobFull = TRUE; 1309 if (DEBUG(JOB)) { 1310 printf("Job queue is full.\n"); 1311 } 1312 } 1313 } 1314 } 1315 1316 /*- 1317 *----------------------------------------------------------------------- 1318 * JobStart -- 1319 * Start a target-creation process going for the target described 1320 * by the graph node gn. 1321 * 1322 * Results: 1323 * JOB_ERROR if there was an error in the commands, JOB_FINISHED 1324 * if there isn't actually anything left to do for the job and 1325 * JOB_RUNNING if the job has been started. 1326 * 1327 * Side Effects: 1328 * A new Job node is created and added to the list of running 1329 * jobs. PMake is forked and a child shell created. 1330 *----------------------------------------------------------------------- 1331 */ 1332 static int 1333 JobStart (gn, flags, previous) 1334 GNode *gn; /* target to create */ 1335 short flags; /* flags for the job to override normal ones. 1336 * e.g. JOB_SPECIAL or JOB_IGNDOTS */ 1337 Job *previous; /* The previous Job structure for this node, 1338 * if any. */ 1339 { 1340 register Job *job; /* new job descriptor */ 1341 char *argv[4]; /* Argument vector to shell */ 1342 static int jobno = 0; /* job number of catching output in a file */ 1343 Boolean cmdsOK; /* true if the nodes commands were all right */ 1344 Boolean local; /* Set true if the job was run locally */ 1345 Boolean noExec; /* Set true if we decide not to run the job */ 1346 1347 if (previous != (Job *)NULL) { 1348 previous->flags &= ~ (JOB_FIRST|JOB_IGNERR|JOB_SILENT|JOB_REMOTE); 1349 job = previous; 1350 } else { 1351 job = (Job *) emalloc (sizeof (Job)); 1352 if (job == (Job *)NULL) { 1353 Punt("JobStart out of memory"); 1354 } 1355 flags |= JOB_FIRST; 1356 } 1357 1358 job->node = gn; 1359 job->tailCmds = NILLNODE; 1360 1361 /* 1362 * Set the initial value of the flags for this job based on the global 1363 * ones and the node's attributes... Any flags supplied by the caller 1364 * are also added to the field. 1365 */ 1366 job->flags = 0; 1367 if (Targ_Ignore (gn)) { 1368 job->flags |= JOB_IGNERR; 1369 } 1370 if (Targ_Silent (gn)) { 1371 job->flags |= JOB_SILENT; 1372 } 1373 job->flags |= flags; 1374 1375 /* 1376 * Check the commands now so any attributes from .DEFAULT have a chance 1377 * to migrate to the node 1378 */ 1379 if (job->flags & JOB_FIRST) { 1380 cmdsOK = Job_CheckCommands(gn, Error); 1381 } else { 1382 cmdsOK = TRUE; 1383 } 1384 1385 /* 1386 * If the -n flag wasn't given, we open up OUR (not the child's) 1387 * temporary file to stuff commands in it. The thing is rd/wr so we don't 1388 * need to reopen it to feed it to the shell. If the -n flag *was* given, 1389 * we just set the file to be stdout. Cute, huh? 1390 */ 1391 if ((gn->type & OP_MAKE) || (!noExecute && !touchFlag)) { 1392 /* 1393 * We're serious here, but if the commands were bogus, we're 1394 * also dead... 1395 */ 1396 if (!cmdsOK) { 1397 DieHorribly(); 1398 } 1399 1400 job->cmdFILE = fopen (tfile, "w+"); 1401 if (job->cmdFILE == (FILE *) NULL) { 1402 Punt ("Could not open %s", tfile); 1403 } 1404 fcntl(fileno(job->cmdFILE), F_SETFD, 1); 1405 /* 1406 * Send the commands to the command file, flush all its buffers then 1407 * rewind and remove the thing. 1408 */ 1409 noExec = FALSE; 1410 1411 /* 1412 * used to be backwards; replace when start doing multiple commands 1413 * per shell. 1414 */ 1415 if (compatMake) { 1416 /* 1417 * Be compatible: If this is the first time for this node, 1418 * verify its commands are ok and open the commands list for 1419 * sequential access by later invocations of JobStart. 1420 * Once that is done, we take the next command off the list 1421 * and print it to the command file. If the command was an 1422 * ellipsis, note that there's nothing more to execute. 1423 */ 1424 if ((job->flags&JOB_FIRST) && (Lst_Open(gn->commands) != SUCCESS)){ 1425 cmdsOK = FALSE; 1426 } else { 1427 LstNode ln = Lst_Next (gn->commands); 1428 1429 if ((ln == NILLNODE) || 1430 JobPrintCommand ((char *)Lst_Datum (ln), job)) 1431 { 1432 noExec = TRUE; 1433 Lst_Close (gn->commands); 1434 } 1435 if (noExec && !(job->flags & JOB_FIRST)) { 1436 /* 1437 * If we're not going to execute anything, the job 1438 * is done and we need to close down the various 1439 * file descriptors we've opened for output, then 1440 * call JobDoOutput to catch the final characters or 1441 * send the file to the screen... Note that the i/o streams 1442 * are only open if this isn't the first job. 1443 * Note also that this could not be done in 1444 * Job_CatchChildren b/c it wasn't clear if there were 1445 * more commands to execute or not... 1446 */ 1447 if (usePipes) { 1448 #ifdef RMT_WILL_WATCH 1449 Rmt_Ignore(job->inPipe); 1450 #else 1451 FD_CLR(job->inPipe, &outputs); 1452 #endif 1453 if (job->outPipe != job->inPipe) { 1454 (void)close (job->outPipe); 1455 } 1456 JobDoOutput (job, TRUE); 1457 (void)close (job->inPipe); 1458 } else { 1459 (void)close (job->outFd); 1460 JobDoOutput (job, TRUE); 1461 } 1462 } 1463 } 1464 } else { 1465 /* 1466 * We can do all the commands at once. hooray for sanity 1467 */ 1468 numCommands = 0; 1469 Lst_ForEach (gn->commands, JobPrintCommand, (ClientData)job); 1470 1471 /* 1472 * If we didn't print out any commands to the shell script, 1473 * there's not much point in executing the shell, is there? 1474 */ 1475 if (numCommands == 0) { 1476 noExec = TRUE; 1477 } 1478 } 1479 } else if (noExecute) { 1480 /* 1481 * Not executing anything -- just print all the commands to stdout 1482 * in one fell swoop. This will still set up job->tailCmds correctly. 1483 */ 1484 if (lastNode != gn) { 1485 printf (targFmt, gn->name); 1486 lastNode = gn; 1487 } 1488 job->cmdFILE = stdout; 1489 /* 1490 * Only print the commands if they're ok, but don't die if they're 1491 * not -- just let the user know they're bad and keep going. It 1492 * doesn't do any harm in this case and may do some good. 1493 */ 1494 if (cmdsOK) { 1495 Lst_ForEach(gn->commands, JobPrintCommand, (ClientData)job); 1496 } 1497 /* 1498 * Don't execute the shell, thank you. 1499 */ 1500 noExec = TRUE; 1501 } else { 1502 /* 1503 * Just touch the target and note that no shell should be executed. 1504 * Set cmdFILE to stdout to make life easier. Check the commands, too, 1505 * but don't die if they're no good -- it does no harm to keep working 1506 * up the graph. 1507 */ 1508 job->cmdFILE = stdout; 1509 Job_Touch (gn, job->flags&JOB_SILENT); 1510 noExec = TRUE; 1511 } 1512 1513 /* 1514 * If we're not supposed to execute a shell, don't. 1515 */ 1516 if (noExec) { 1517 /* 1518 * Unlink and close the command file if we opened one 1519 */ 1520 if (job->cmdFILE != stdout) { 1521 (void) unlink (tfile); 1522 fclose(job->cmdFILE); 1523 } else { 1524 fflush (stdout); 1525 } 1526 1527 /* 1528 * We only want to work our way up the graph if we aren't here because 1529 * the commands for the job were no good. 1530 */ 1531 if (cmdsOK) { 1532 if (aborting == 0) { 1533 if (job->tailCmds != NILLNODE) { 1534 Lst_ForEachFrom(job->node->commands, job->tailCmds, 1535 JobSaveCommand, 1536 (ClientData)job->node); 1537 } 1538 Make_Update(job->node); 1539 } 1540 free((Address)job); 1541 return(JOB_FINISHED); 1542 } else { 1543 free((Address)job); 1544 return(JOB_ERROR); 1545 } 1546 } else { 1547 fflush (job->cmdFILE); 1548 (void) unlink (tfile); 1549 } 1550 1551 /* 1552 * Set up the control arguments to the shell. This is based on the flags 1553 * set earlier for this job. 1554 */ 1555 JobMakeArgv(job, argv); 1556 1557 /* 1558 * If we're using pipes to catch output, create the pipe by which we'll 1559 * get the shell's output. If we're using files, print out that we're 1560 * starting a job and then set up its temporary-file name. This is just 1561 * tfile with two extra digits tacked on -- jobno. 1562 */ 1563 if (job->flags & JOB_FIRST) { 1564 if (usePipes) { 1565 int fd[2]; 1566 (void) pipe(fd); 1567 job->inPipe = fd[0]; 1568 job->outPipe = fd[1]; 1569 (void)fcntl (job->inPipe, F_SETFD, 1); 1570 (void)fcntl (job->outPipe, F_SETFD, 1); 1571 } else { 1572 printf ("Remaking `%s'\n", gn->name); 1573 fflush (stdout); 1574 sprintf (job->outFile, "%s%02d", tfile, jobno); 1575 jobno = (jobno + 1) % 100; 1576 job->outFd = open(job->outFile,O_WRONLY|O_CREAT|O_APPEND,0600); 1577 (void)fcntl (job->outFd, F_SETFD, 1); 1578 } 1579 } 1580 1581 local = TRUE; 1582 1583 if (local && (((nLocal >= maxLocal) && 1584 !(job->flags & JOB_SPECIAL) && 1585 (maxLocal != 0)))) 1586 { 1587 /* 1588 * The job can only be run locally, but we've hit the limit of 1589 * local concurrency, so put the job on hold until some other job 1590 * finishes. Note that the special jobs (.BEGIN, .INTERRUPT and .END) 1591 * may be run locally even when the local limit has been reached 1592 * (e.g. when maxLocal == 0), though they will be exported if at 1593 * all possible. 1594 */ 1595 jobFull = TRUE; 1596 1597 if (DEBUG(JOB)) { 1598 printf("Can only run job locally.\n"); 1599 } 1600 job->flags |= JOB_RESTART; 1601 (void)Lst_AtEnd(stoppedJobs, (ClientData)job); 1602 } else { 1603 if ((nLocal >= maxLocal) && local) { 1604 /* 1605 * If we're running this job locally as a special case (see above), 1606 * at least say the table is full. 1607 */ 1608 jobFull = TRUE; 1609 if (DEBUG(JOB)) { 1610 printf("Local job queue is full.\n"); 1611 } 1612 } 1613 JobExec(job, argv); 1614 } 1615 return(JOB_RUNNING); 1616 } 1617 1618 /*- 1619 *----------------------------------------------------------------------- 1620 * JobDoOutput -- 1621 * This function is called at different times depending on 1622 * whether the user has specified that output is to be collected 1623 * via pipes or temporary files. In the former case, we are called 1624 * whenever there is something to read on the pipe. We collect more 1625 * output from the given job and store it in the job's outBuf. If 1626 * this makes up a line, we print it tagged by the job's identifier, 1627 * as necessary. 1628 * If output has been collected in a temporary file, we open the 1629 * file and read it line by line, transfering it to our own 1630 * output channel until the file is empty. At which point we 1631 * remove the temporary file. 1632 * In both cases, however, we keep our figurative eye out for the 1633 * 'noPrint' line for the shell from which the output came. If 1634 * we recognize a line, we don't print it. If the command is not 1635 * alone on the line (the character after it is not \0 or \n), we 1636 * do print whatever follows it. 1637 * 1638 * Results: 1639 * None 1640 * 1641 * Side Effects: 1642 * curPos may be shifted as may the contents of outBuf. 1643 *----------------------------------------------------------------------- 1644 */ 1645 static void 1646 JobDoOutput (job, finish) 1647 register Job *job; /* the job whose output needs printing */ 1648 Boolean finish; /* TRUE if this is the last time we'll be 1649 * called for this job */ 1650 { 1651 Boolean gotNL = FALSE; /* true if got a newline */ 1652 register int nr; /* number of bytes read */ 1653 register int i; /* auxiliary index into outBuf */ 1654 register int max; /* limit for i (end of current data) */ 1655 int nRead; /* (Temporary) number of bytes read */ 1656 1657 FILE *oFILE; /* Stream pointer to shell's output file */ 1658 char inLine[132]; 1659 1660 1661 if (usePipes) { 1662 /* 1663 * Read as many bytes as will fit in the buffer. 1664 */ 1665 end_loop: 1666 1667 nRead = read (job->inPipe, &job->outBuf[job->curPos], 1668 JOB_BUFSIZE - job->curPos); 1669 if (nRead < 0) { 1670 if (DEBUG(JOB)) { 1671 perror("JobDoOutput(piperead)"); 1672 } 1673 nr = 0; 1674 } else { 1675 nr = nRead; 1676 } 1677 1678 /* 1679 * If we hit the end-of-file (the job is dead), we must flush its 1680 * remaining output, so pretend we read a newline if there's any 1681 * output remaining in the buffer. 1682 * Also clear the 'finish' flag so we stop looping. 1683 */ 1684 if ((nr == 0) && (job->curPos != 0)) { 1685 job->outBuf[job->curPos] = '\n'; 1686 nr = 1; 1687 finish = FALSE; 1688 } else if (nr == 0) { 1689 finish = FALSE; 1690 } 1691 1692 /* 1693 * Look for the last newline in the bytes we just got. If there is 1694 * one, break out of the loop with 'i' as its index and gotNL set 1695 * TRUE. 1696 */ 1697 max = job->curPos + nr; 1698 for (i = job->curPos + nr - 1; i >= job->curPos; i--) { 1699 if (job->outBuf[i] == '\n') { 1700 gotNL = TRUE; 1701 break; 1702 } else if (job->outBuf[i] == '\0') { 1703 /* 1704 * Why? 1705 */ 1706 job->outBuf[i] = ' '; 1707 } 1708 } 1709 1710 if (!gotNL) { 1711 job->curPos += nr; 1712 if (job->curPos == JOB_BUFSIZE) { 1713 /* 1714 * If we've run out of buffer space, we have no choice 1715 * but to print the stuff. sigh. 1716 */ 1717 gotNL = TRUE; 1718 i = job->curPos; 1719 } 1720 } 1721 if (gotNL) { 1722 /* 1723 * Need to send the output to the screen. Null terminate it 1724 * first, overwriting the newline character if there was one. 1725 * So long as the line isn't one we should filter (according 1726 * to the shell description), we print the line, preceeded 1727 * by a target banner if this target isn't the same as the 1728 * one for which we last printed something. 1729 * The rest of the data in the buffer are then shifted down 1730 * to the start of the buffer and curPos is set accordingly. 1731 */ 1732 job->outBuf[i] = '\0'; 1733 if (i >= job->curPos) { 1734 register char *cp, *ecp; 1735 1736 cp = job->outBuf; 1737 if (commandShell->noPrint) { 1738 ecp = Str_FindSubstring(job->outBuf, 1739 commandShell->noPrint); 1740 while (ecp != (char *)NULL) { 1741 if (cp != ecp) { 1742 *ecp = '\0'; 1743 if (job->node != lastNode) { 1744 printf (targFmt, job->node->name); 1745 lastNode = job->node; 1746 } 1747 /* 1748 * The only way there wouldn't be a newline after 1749 * this line is if it were the last in the buffer. 1750 * however, since the non-printable comes after it, 1751 * there must be a newline, so we don't print one. 1752 */ 1753 printf ("%s", cp); 1754 } 1755 cp = ecp + commandShell->noPLen; 1756 if (cp != &job->outBuf[i]) { 1757 /* 1758 * Still more to print, look again after skipping 1759 * the whitespace following the non-printable 1760 * command.... 1761 */ 1762 cp++; 1763 while (*cp == ' ' || *cp == '\t' || *cp == '\n') { 1764 cp++; 1765 } 1766 ecp = Str_FindSubstring (cp, 1767 commandShell->noPrint); 1768 } else { 1769 break; 1770 } 1771 } 1772 } 1773 1774 /* 1775 * There's still more in that thar buffer. This time, though, 1776 * we know there's no newline at the end, so we add one of 1777 * our own free will. 1778 */ 1779 if (*cp != '\0') { 1780 if (job->node != lastNode) { 1781 printf (targFmt, job->node->name); 1782 lastNode = job->node; 1783 } 1784 printf ("%s\n", cp); 1785 } 1786 1787 fflush (stdout); 1788 } 1789 if (i < max - 1) { 1790 /* shift the remaining characters down */ 1791 memcpy ( job->outBuf, &job->outBuf[i + 1], max - (i + 1)); 1792 job->curPos = max - (i + 1); 1793 1794 } else { 1795 /* 1796 * We have written everything out, so we just start over 1797 * from the start of the buffer. No copying. No nothing. 1798 */ 1799 job->curPos = 0; 1800 } 1801 } 1802 if (finish) { 1803 /* 1804 * If the finish flag is true, we must loop until we hit 1805 * end-of-file on the pipe. This is guaranteed to happen eventually 1806 * since the other end of the pipe is now closed (we closed it 1807 * explicitly and the child has exited). When we do get an EOF, 1808 * finish will be set FALSE and we'll fall through and out. 1809 */ 1810 goto end_loop; 1811 } 1812 } else { 1813 /* 1814 * We've been called to retrieve the output of the job from the 1815 * temporary file where it's been squirreled away. This consists of 1816 * opening the file, reading the output line by line, being sure not 1817 * to print the noPrint line for the shell we used, then close and 1818 * remove the temporary file. Very simple. 1819 * 1820 * Change to read in blocks and do FindSubString type things as for 1821 * pipes? That would allow for "@echo -n..." 1822 */ 1823 oFILE = fopen (job->outFile, "r"); 1824 if (oFILE != (FILE *) NULL) { 1825 printf ("Results of making %s:\n", job->node->name); 1826 while (fgets (inLine, sizeof(inLine), oFILE) != NULL) { 1827 register char *cp, *ecp, *endp; 1828 1829 cp = inLine; 1830 endp = inLine + strlen(inLine); 1831 if (endp[-1] == '\n') { 1832 *--endp = '\0'; 1833 } 1834 if (commandShell->noPrint) { 1835 ecp = Str_FindSubstring(cp, commandShell->noPrint); 1836 while (ecp != (char *)NULL) { 1837 if (cp != ecp) { 1838 *ecp = '\0'; 1839 /* 1840 * The only way there wouldn't be a newline after 1841 * this line is if it were the last in the buffer. 1842 * however, since the non-printable comes after it, 1843 * there must be a newline, so we don't print one. 1844 */ 1845 printf ("%s", cp); 1846 } 1847 cp = ecp + commandShell->noPLen; 1848 if (cp != endp) { 1849 /* 1850 * Still more to print, look again after skipping 1851 * the whitespace following the non-printable 1852 * command.... 1853 */ 1854 cp++; 1855 while (*cp == ' ' || *cp == '\t' || *cp == '\n') { 1856 cp++; 1857 } 1858 ecp = Str_FindSubstring(cp, commandShell->noPrint); 1859 } else { 1860 break; 1861 } 1862 } 1863 } 1864 1865 /* 1866 * There's still more in that thar buffer. This time, though, 1867 * we know there's no newline at the end, so we add one of 1868 * our own free will. 1869 */ 1870 if (*cp != '\0') { 1871 printf ("%s\n", cp); 1872 } 1873 } 1874 fclose (oFILE); 1875 (void) unlink (job->outFile); 1876 } 1877 } 1878 fflush(stdout); 1879 } 1880 1881 /*- 1882 *----------------------------------------------------------------------- 1883 * Job_CatchChildren -- 1884 * Handle the exit of a child. Called from Make_Make. 1885 * 1886 * Results: 1887 * none. 1888 * 1889 * Side Effects: 1890 * The job descriptor is removed from the list of children. 1891 * 1892 * Notes: 1893 * We do waits, blocking or not, according to the wisdom of our 1894 * caller, until there are no more children to report. For each 1895 * job, call JobFinish to finish things off. This will take care of 1896 * putting jobs on the stoppedJobs queue. 1897 * 1898 *----------------------------------------------------------------------- 1899 */ 1900 void 1901 Job_CatchChildren (block) 1902 Boolean block; /* TRUE if should block on the wait. */ 1903 { 1904 int pid; /* pid of dead child */ 1905 register Job *job; /* job descriptor for dead child */ 1906 LstNode jnode; /* list element for finding job */ 1907 union wait status; /* Exit/termination status */ 1908 1909 /* 1910 * Don't even bother if we know there's no one around. 1911 */ 1912 if (nLocal == 0) { 1913 return; 1914 } 1915 1916 while ((pid = wait3((int *)&status, (block?0:WNOHANG)|WUNTRACED, 1917 (struct rusage *)0)) > 0) 1918 { 1919 if (DEBUG(JOB)) 1920 printf("Process %d exited or stopped.\n", pid); 1921 1922 1923 jnode = Lst_Find (jobs, (ClientData)pid, JobCmpPid); 1924 1925 if (jnode == NILLNODE) { 1926 if (WIFSIGNALED(status) && (status.w_termsig == SIGCONT)) { 1927 jnode = Lst_Find(stoppedJobs, (ClientData)pid, JobCmpPid); 1928 if (jnode == NILLNODE) { 1929 Error("Resumed child (%d) not in table", pid); 1930 continue; 1931 } 1932 job = (Job *)Lst_Datum(jnode); 1933 (void)Lst_Remove(stoppedJobs, jnode); 1934 } else { 1935 Error ("Child (%d) not in table?", pid); 1936 continue; 1937 } 1938 } else { 1939 job = (Job *) Lst_Datum (jnode); 1940 (void)Lst_Remove (jobs, jnode); 1941 nJobs -= 1; 1942 if (jobFull && DEBUG(JOB)) { 1943 printf("Job queue is no longer full.\n"); 1944 } 1945 jobFull = FALSE; 1946 nLocal -= 1; 1947 } 1948 1949 JobFinish (job, status); 1950 } 1951 } 1952 1953 /*- 1954 *----------------------------------------------------------------------- 1955 * Job_CatchOutput -- 1956 * Catch the output from our children, if we're using 1957 * pipes do so. Otherwise just block time until we get a 1958 * signal (most likely a SIGCHLD) since there's no point in 1959 * just spinning when there's nothing to do and the reaping 1960 * of a child can wait for a while. 1961 * 1962 * Results: 1963 * None 1964 * 1965 * Side Effects: 1966 * Output is read from pipes if we're piping. 1967 * ----------------------------------------------------------------------- 1968 */ 1969 void 1970 Job_CatchOutput () 1971 { 1972 int nfds; 1973 struct timeval timeout; 1974 fd_set readfds; 1975 register LstNode ln; 1976 register Job *job; 1977 #ifdef RMT_WILL_WATCH 1978 int pnJobs; /* Previous nJobs */ 1979 #endif 1980 1981 fflush(stdout); 1982 #ifdef RMT_WILL_WATCH 1983 pnJobs = nJobs; 1984 1985 /* 1986 * It is possible for us to be called with nJobs equal to 0. This happens 1987 * if all the jobs finish and a job that is stopped cannot be run 1988 * locally (eg if maxLocal is 0) and cannot be exported. The job will 1989 * be placed back on the stoppedJobs queue, Job_Empty() will return false, 1990 * Make_Run will call us again when there's nothing for which to wait. 1991 * nJobs never changes, so we loop forever. Hence the check. It could 1992 * be argued that we should sleep for a bit so as not to swamp the 1993 * exportation system with requests. Perhaps we should. 1994 * 1995 * NOTE: IT IS THE RESPONSIBILITY OF Rmt_Wait TO CALL Job_CatchChildren 1996 * IN A TIMELY FASHION TO CATCH ANY LOCALLY RUNNING JOBS THAT EXIT. 1997 * It may use the variable nLocal to determine if it needs to call 1998 * Job_CatchChildren (if nLocal is 0, there's nothing for which to 1999 * wait...) 2000 */ 2001 while (nJobs != 0 && pnJobs == nJobs) { 2002 Rmt_Wait(); 2003 } 2004 #else 2005 if (usePipes) { 2006 readfds = outputs; 2007 timeout.tv_sec = SEL_SEC; 2008 timeout.tv_usec = SEL_USEC; 2009 2010 if ((nfds = select (FD_SETSIZE, &readfds, (fd_set *) 0, (fd_set *) 0, &timeout)) < 0) 2011 { 2012 return; 2013 } else { 2014 if (Lst_Open (jobs) == FAILURE) { 2015 Punt ("Cannot open job table"); 2016 } 2017 while (nfds && (ln = Lst_Next (jobs)) != NILLNODE) { 2018 job = (Job *) Lst_Datum (ln); 2019 if (FD_ISSET(job->inPipe, &readfds)) { 2020 JobDoOutput (job, FALSE); 2021 nfds -= 1; 2022 } 2023 } 2024 Lst_Close (jobs); 2025 } 2026 } 2027 #endif /* RMT_WILL_WATCH */ 2028 } 2029 2030 /*- 2031 *----------------------------------------------------------------------- 2032 * Job_Make -- 2033 * Start the creation of a target. Basically a front-end for 2034 * JobStart used by the Make module. 2035 * 2036 * Results: 2037 * None. 2038 * 2039 * Side Effects: 2040 * Another job is started. 2041 * 2042 *----------------------------------------------------------------------- 2043 */ 2044 void 2045 Job_Make (gn) 2046 GNode *gn; 2047 { 2048 (void)JobStart (gn, 0, (Job *)NULL); 2049 } 2050 2051 /*- 2052 *----------------------------------------------------------------------- 2053 * Job_Init -- 2054 * Initialize the process module 2055 * 2056 * Results: 2057 * none 2058 * 2059 * Side Effects: 2060 * lists and counters are initialized 2061 *----------------------------------------------------------------------- 2062 */ 2063 void 2064 Job_Init (maxproc, maxlocal) 2065 int maxproc; /* the greatest number of jobs which may be 2066 * running at one time */ 2067 int maxlocal; /* the greatest number of local jobs which may 2068 * be running at once. */ 2069 { 2070 GNode *begin; /* node for commands to do at the very start */ 2071 2072 sprintf (tfile, "/tmp/make%05d", getpid()); 2073 2074 jobs = Lst_Init (FALSE); 2075 stoppedJobs = Lst_Init(FALSE); 2076 maxJobs = maxproc; 2077 maxLocal = maxlocal; 2078 nJobs = 0; 2079 nLocal = 0; 2080 jobFull = FALSE; 2081 2082 aborting = 0; 2083 errors = 0; 2084 2085 lastNode = NILGNODE; 2086 2087 if (maxJobs == 1) { 2088 /* 2089 * If only one job can run at a time, there's no need for a banner, 2090 * no is there? 2091 */ 2092 targFmt = ""; 2093 } else { 2094 targFmt = TARG_FMT; 2095 } 2096 2097 if (shellPath == (char *) NULL) { 2098 /* 2099 * The user didn't specify a shell to use, so we are using the 2100 * default one... Both the absolute path and the last component 2101 * must be set. The last component is taken from the 'name' field 2102 * of the default shell description pointed-to by commandShell. 2103 * All default shells are located in _PATH_DEFSHELLDIR. 2104 */ 2105 shellName = commandShell->name; 2106 shellPath = str_concat (_PATH_DEFSHELLDIR, shellName, STR_ADDSLASH); 2107 } 2108 2109 if (commandShell->exit == (char *)NULL) { 2110 commandShell->exit = ""; 2111 } 2112 if (commandShell->echo == (char *)NULL) { 2113 commandShell->echo = ""; 2114 } 2115 2116 /* 2117 * Catch the four signals that POSIX specifies if they aren't ignored. 2118 * JobPassSig will take care of calling JobInterrupt if appropriate. 2119 */ 2120 if (signal (SIGINT, SIG_IGN) != SIG_IGN) { 2121 signal (SIGINT, JobPassSig); 2122 } 2123 if (signal (SIGHUP, SIG_IGN) != SIG_IGN) { 2124 signal (SIGHUP, JobPassSig); 2125 } 2126 if (signal (SIGQUIT, SIG_IGN) != SIG_IGN) { 2127 signal (SIGQUIT, JobPassSig); 2128 } 2129 if (signal (SIGTERM, SIG_IGN) != SIG_IGN) { 2130 signal (SIGTERM, JobPassSig); 2131 } 2132 /* 2133 * There are additional signals that need to be caught and passed if 2134 * either the export system wants to be told directly of signals or if 2135 * we're giving each job its own process group (since then it won't get 2136 * signals from the terminal driver as we own the terminal) 2137 */ 2138 #if defined(RMT_WANTS_SIGNALS) || defined(USE_PGRP) 2139 if (signal (SIGTSTP, SIG_IGN) != SIG_IGN) { 2140 signal (SIGTSTP, JobPassSig); 2141 } 2142 if (signal (SIGTTOU, SIG_IGN) != SIG_IGN) { 2143 signal (SIGTTOU, JobPassSig); 2144 } 2145 if (signal (SIGTTIN, SIG_IGN) != SIG_IGN) { 2146 signal (SIGTTIN, JobPassSig); 2147 } 2148 if (signal (SIGWINCH, SIG_IGN) != SIG_IGN) { 2149 signal (SIGWINCH, JobPassSig); 2150 } 2151 #endif 2152 2153 begin = Targ_FindNode (".BEGIN", TARG_NOCREATE); 2154 2155 if (begin != NILGNODE) { 2156 JobStart (begin, JOB_SPECIAL, (Job *)0); 2157 while (nJobs) { 2158 Job_CatchOutput(); 2159 #ifndef RMT_WILL_WATCH 2160 Job_CatchChildren (!usePipes); 2161 #endif /* RMT_WILL_WATCH */ 2162 } 2163 } 2164 postCommands = Targ_FindNode (".END", TARG_CREATE); 2165 } 2166 2167 /*- 2168 *----------------------------------------------------------------------- 2169 * Job_Full -- 2170 * See if the job table is full. It is considered full if it is OR 2171 * if we are in the process of aborting OR if we have 2172 * reached/exceeded our local quota. This prevents any more jobs 2173 * from starting up. 2174 * 2175 * Results: 2176 * TRUE if the job table is full, FALSE otherwise 2177 * Side Effects: 2178 * None. 2179 *----------------------------------------------------------------------- 2180 */ 2181 Boolean 2182 Job_Full () 2183 { 2184 return (aborting || jobFull); 2185 } 2186 2187 /*- 2188 *----------------------------------------------------------------------- 2189 * Job_Empty -- 2190 * See if the job table is empty. Because the local concurrency may 2191 * be set to 0, it is possible for the job table to become empty, 2192 * while the list of stoppedJobs remains non-empty. In such a case, 2193 * we want to restart as many jobs as we can. 2194 * 2195 * Results: 2196 * TRUE if it is. FALSE if it ain't. 2197 * 2198 * Side Effects: 2199 * None. 2200 * 2201 * ----------------------------------------------------------------------- 2202 */ 2203 Boolean 2204 Job_Empty () 2205 { 2206 if (nJobs == 0) { 2207 if (!Lst_IsEmpty(stoppedJobs) && !aborting) { 2208 /* 2209 * The job table is obviously not full if it has no jobs in 2210 * it...Try and restart the stopped jobs. 2211 */ 2212 jobFull = FALSE; 2213 while (!jobFull && !Lst_IsEmpty(stoppedJobs)) { 2214 JobRestart((Job *)Lst_DeQueue(stoppedJobs)); 2215 } 2216 return(FALSE); 2217 } else { 2218 return(TRUE); 2219 } 2220 } else { 2221 return(FALSE); 2222 } 2223 } 2224 2225 /*- 2226 *----------------------------------------------------------------------- 2227 * JobMatchShell -- 2228 * Find a matching shell in 'shells' given its final component. 2229 * 2230 * Results: 2231 * A pointer to the Shell structure. 2232 * 2233 * Side Effects: 2234 * None. 2235 * 2236 *----------------------------------------------------------------------- 2237 */ 2238 static Shell * 2239 JobMatchShell (name) 2240 char *name; /* Final component of shell path */ 2241 { 2242 register Shell *sh; /* Pointer into shells table */ 2243 Shell *match; /* Longest-matching shell */ 2244 register char *cp1, 2245 *cp2; 2246 char *eoname; 2247 2248 eoname = name + strlen (name); 2249 2250 match = (Shell *) NULL; 2251 2252 for (sh = shells; sh->name != NULL; sh++) { 2253 for (cp1 = eoname - strlen (sh->name), cp2 = sh->name; 2254 *cp1 != '\0' && *cp1 == *cp2; 2255 cp1++, cp2++) { 2256 continue; 2257 } 2258 if (*cp1 != *cp2) { 2259 continue; 2260 } else if (match == (Shell *) NULL || 2261 strlen (match->name) < strlen (sh->name)) { 2262 match = sh; 2263 } 2264 } 2265 return (match == (Shell *) NULL ? sh : match); 2266 } 2267 2268 /*- 2269 *----------------------------------------------------------------------- 2270 * Job_ParseShell -- 2271 * Parse a shell specification and set up commandShell, shellPath 2272 * and shellName appropriately. 2273 * 2274 * Results: 2275 * FAILURE if the specification was incorrect. 2276 * 2277 * Side Effects: 2278 * commandShell points to a Shell structure (either predefined or 2279 * created from the shell spec), shellPath is the full path of the 2280 * shell described by commandShell, while shellName is just the 2281 * final component of shellPath. 2282 * 2283 * Notes: 2284 * A shell specification consists of a .SHELL target, with dependency 2285 * operator, followed by a series of blank-separated words. Double 2286 * quotes can be used to use blanks in words. A backslash escapes 2287 * anything (most notably a double-quote and a space) and 2288 * provides the functionality it does in C. Each word consists of 2289 * keyword and value separated by an equal sign. There should be no 2290 * unnecessary spaces in the word. The keywords are as follows: 2291 * name Name of shell. 2292 * path Location of shell. Overrides "name" if given 2293 * quiet Command to turn off echoing. 2294 * echo Command to turn echoing on 2295 * filter Result of turning off echoing that shouldn't be 2296 * printed. 2297 * echoFlag Flag to turn echoing on at the start 2298 * errFlag Flag to turn error checking on at the start 2299 * hasErrCtl True if shell has error checking control 2300 * check Command to turn on error checking if hasErrCtl 2301 * is TRUE or template of command to echo a command 2302 * for which error checking is off if hasErrCtl is 2303 * FALSE. 2304 * ignore Command to turn off error checking if hasErrCtl 2305 * is TRUE or template of command to execute a 2306 * command so as to ignore any errors it returns if 2307 * hasErrCtl is FALSE. 2308 * 2309 *----------------------------------------------------------------------- 2310 */ 2311 ReturnStatus 2312 Job_ParseShell (line) 2313 char *line; /* The shell spec */ 2314 { 2315 char **words; 2316 int wordCount; 2317 register char **argv; 2318 register int argc; 2319 char *path; 2320 Shell newShell; 2321 Boolean fullSpec = FALSE; 2322 2323 while (isspace (*line)) { 2324 line++; 2325 } 2326 words = brk_string (line, &wordCount); 2327 2328 memset ((Address)&newShell, 0, sizeof(newShell)); 2329 2330 /* 2331 * Parse the specification by keyword 2332 */ 2333 for (path = (char *)NULL, argc = wordCount - 1, argv = words + 1; 2334 argc != 0; 2335 argc--, argv++) { 2336 if (strncmp (*argv, "path=", 5) == 0) { 2337 path = &argv[0][5]; 2338 } else if (strncmp (*argv, "name=", 5) == 0) { 2339 newShell.name = &argv[0][5]; 2340 } else { 2341 if (strncmp (*argv, "quiet=", 6) == 0) { 2342 newShell.echoOff = &argv[0][6]; 2343 } else if (strncmp (*argv, "echo=", 5) == 0) { 2344 newShell.echoOn = &argv[0][5]; 2345 } else if (strncmp (*argv, "filter=", 7) == 0) { 2346 newShell.noPrint = &argv[0][7]; 2347 newShell.noPLen = strlen(newShell.noPrint); 2348 } else if (strncmp (*argv, "echoFlag=", 9) == 0) { 2349 newShell.echo = &argv[0][9]; 2350 } else if (strncmp (*argv, "errFlag=", 8) == 0) { 2351 newShell.exit = &argv[0][8]; 2352 } else if (strncmp (*argv, "hasErrCtl=", 10) == 0) { 2353 char c = argv[0][10]; 2354 newShell.hasErrCtl = !((c != 'Y') && (c != 'y') && 2355 (c != 'T') && (c != 't')); 2356 } else if (strncmp (*argv, "check=", 6) == 0) { 2357 newShell.errCheck = &argv[0][6]; 2358 } else if (strncmp (*argv, "ignore=", 7) == 0) { 2359 newShell.ignErr = &argv[0][7]; 2360 } else { 2361 Parse_Error (PARSE_FATAL, "Unknown keyword \"%s\"", 2362 *argv); 2363 return (FAILURE); 2364 } 2365 fullSpec = TRUE; 2366 } 2367 } 2368 2369 if (path == (char *)NULL) { 2370 /* 2371 * If no path was given, the user wants one of the pre-defined shells, 2372 * yes? So we find the one s/he wants with the help of JobMatchShell 2373 * and set things up the right way. shellPath will be set up by 2374 * Job_Init. 2375 */ 2376 if (newShell.name == (char *)NULL) { 2377 Parse_Error (PARSE_FATAL, "Neither path nor name specified"); 2378 return (FAILURE); 2379 } else { 2380 commandShell = JobMatchShell (newShell.name); 2381 shellName = newShell.name; 2382 } 2383 } else { 2384 /* 2385 * The user provided a path. If s/he gave nothing else (fullSpec is 2386 * FALSE), try and find a matching shell in the ones we know of. 2387 * Else we just take the specification at its word and copy it 2388 * to a new location. In either case, we need to record the 2389 * path the user gave for the shell. 2390 */ 2391 shellPath = path; 2392 path = strrchr (path, '/'); 2393 if (path == (char *)NULL) { 2394 path = shellPath; 2395 } else { 2396 path += 1; 2397 } 2398 if (newShell.name != (char *)NULL) { 2399 shellName = newShell.name; 2400 } else { 2401 shellName = path; 2402 } 2403 if (!fullSpec) { 2404 commandShell = JobMatchShell (shellName); 2405 } else { 2406 commandShell = (Shell *) emalloc(sizeof(Shell)); 2407 *commandShell = newShell; 2408 } 2409 } 2410 2411 if (commandShell->echoOn && commandShell->echoOff) { 2412 commandShell->hasEchoCtl = TRUE; 2413 } 2414 2415 if (!commandShell->hasErrCtl) { 2416 if (commandShell->errCheck == (char *)NULL) { 2417 commandShell->errCheck = ""; 2418 } 2419 if (commandShell->ignErr == (char *)NULL) { 2420 commandShell->ignErr = "%s\n"; 2421 } 2422 } 2423 2424 /* 2425 * Do not free up the words themselves, since they might be in use by the 2426 * shell specification... 2427 */ 2428 free (words); 2429 return SUCCESS; 2430 } 2431 2432 /*- 2433 *----------------------------------------------------------------------- 2434 * JobInterrupt -- 2435 * Handle the receipt of an interrupt. 2436 * 2437 * Results: 2438 * None 2439 * 2440 * Side Effects: 2441 * All children are killed. Another job will be started if the 2442 * .INTERRUPT target was given. 2443 *----------------------------------------------------------------------- 2444 */ 2445 static void 2446 JobInterrupt (runINTERRUPT) 2447 int runINTERRUPT; /* Non-zero if commands for the .INTERRUPT 2448 * target should be executed */ 2449 { 2450 LstNode ln; /* element in job table */ 2451 Job *job; /* job descriptor in that element */ 2452 GNode *interrupt; /* the node describing the .INTERRUPT target */ 2453 struct stat sb; 2454 2455 aborting = ABORT_INTERRUPT; 2456 2457 (void)Lst_Open (jobs); 2458 while ((ln = Lst_Next (jobs)) != NILLNODE) { 2459 job = (Job *) Lst_Datum (ln); 2460 2461 if (!Targ_Precious (job->node)) { 2462 char *file = (job->node->path == (char *)NULL ? 2463 job->node->name : 2464 job->node->path); 2465 if (!stat(file, &sb) && S_ISREG(sb.st_mode) && 2466 unlink (file) == 0) { 2467 Error ("*** %s removed", file); 2468 } 2469 } 2470 #ifdef RMT_WANTS_SIGNALS 2471 if (job->flags & JOB_REMOTE) { 2472 /* 2473 * If job is remote, let the Rmt module do the killing. 2474 */ 2475 if (!Rmt_Signal(job, SIGINT)) { 2476 /* 2477 * If couldn't kill the thing, finish it out now with an 2478 * error code, since no exit report will come in likely. 2479 */ 2480 union wait status; 2481 2482 status.w_status = 0; 2483 status.w_retcode = 1; 2484 JobFinish(job, status); 2485 } 2486 } else if (job->pid) { 2487 KILL(job->pid, SIGINT); 2488 } 2489 #else 2490 if (job->pid) { 2491 KILL(job->pid, SIGINT); 2492 } 2493 #endif /* RMT_WANTS_SIGNALS */ 2494 } 2495 Lst_Close (jobs); 2496 2497 if (runINTERRUPT && !touchFlag) { 2498 interrupt = Targ_FindNode (".INTERRUPT", TARG_NOCREATE); 2499 if (interrupt != NILGNODE) { 2500 ignoreErrors = FALSE; 2501 2502 JobStart (interrupt, JOB_IGNDOTS, (Job *)0); 2503 while (nJobs) { 2504 Job_CatchOutput(); 2505 #ifndef RMT_WILL_WATCH 2506 Job_CatchChildren (!usePipes); 2507 #endif /* RMT_WILL_WATCH */ 2508 } 2509 } 2510 } 2511 (void) unlink (tfile); 2512 exit (0); 2513 } 2514 2515 /* 2516 *----------------------------------------------------------------------- 2517 * Job_End -- 2518 * Do final processing such as the running of the commands 2519 * attached to the .END target. 2520 * 2521 * Results: 2522 * Number of errors reported. 2523 * 2524 * Side Effects: 2525 * The process' temporary file (tfile) is removed if it still 2526 * existed. 2527 *----------------------------------------------------------------------- 2528 */ 2529 int 2530 Job_End () 2531 { 2532 if (postCommands != NILGNODE && !Lst_IsEmpty (postCommands->commands)) { 2533 if (errors) { 2534 Error ("Errors reported so .END ignored"); 2535 } else { 2536 JobStart (postCommands, JOB_SPECIAL | JOB_IGNDOTS, 2537 (Job *)0); 2538 2539 while (nJobs) { 2540 Job_CatchOutput(); 2541 #ifndef RMT_WILL_WATCH 2542 Job_CatchChildren (!usePipes); 2543 #endif /* RMT_WILL_WATCH */ 2544 } 2545 } 2546 } 2547 (void) unlink (tfile); 2548 return(errors); 2549 } 2550 2551 /*- 2552 *----------------------------------------------------------------------- 2553 * Job_Wait -- 2554 * Waits for all running jobs to finish and returns. Sets 'aborting' 2555 * to ABORT_WAIT to prevent other jobs from starting. 2556 * 2557 * Results: 2558 * None. 2559 * 2560 * Side Effects: 2561 * Currently running jobs finish. 2562 * 2563 *----------------------------------------------------------------------- 2564 */ 2565 void 2566 Job_Wait() 2567 { 2568 aborting = ABORT_WAIT; 2569 while (nJobs != 0) { 2570 Job_CatchOutput(); 2571 #ifndef RMT_WILL_WATCH 2572 Job_CatchChildren(!usePipes); 2573 #endif /* RMT_WILL_WATCH */ 2574 } 2575 aborting = 0; 2576 } 2577 2578 /*- 2579 *----------------------------------------------------------------------- 2580 * Job_AbortAll -- 2581 * Abort all currently running jobs without handling output or anything. 2582 * This function is to be called only in the event of a major 2583 * error. Most definitely NOT to be called from JobInterrupt. 2584 * 2585 * Results: 2586 * None 2587 * 2588 * Side Effects: 2589 * All children are killed, not just the firstborn 2590 *----------------------------------------------------------------------- 2591 */ 2592 void 2593 Job_AbortAll () 2594 { 2595 LstNode ln; /* element in job table */ 2596 Job *job; /* the job descriptor in that element */ 2597 int foo; 2598 2599 aborting = ABORT_ERROR; 2600 2601 if (nJobs) { 2602 2603 (void)Lst_Open (jobs); 2604 while ((ln = Lst_Next (jobs)) != NILLNODE) { 2605 job = (Job *) Lst_Datum (ln); 2606 2607 /* 2608 * kill the child process with increasingly drastic signals to make 2609 * darn sure it's dead. 2610 */ 2611 #ifdef RMT_WANTS_SIGNALS 2612 if (job->flags & JOB_REMOTE) { 2613 Rmt_Signal(job, SIGINT); 2614 Rmt_Signal(job, SIGKILL); 2615 } else { 2616 KILL(job->pid, SIGINT); 2617 KILL(job->pid, SIGKILL); 2618 } 2619 #else 2620 KILL(job->pid, SIGINT); 2621 KILL(job->pid, SIGKILL); 2622 #endif /* RMT_WANTS_SIGNALS */ 2623 } 2624 } 2625 2626 /* 2627 * Catch as many children as want to report in at first, then give up 2628 */ 2629 while (wait3(&foo, WNOHANG, (struct rusage *)0) > 0) 2630 continue; 2631 (void) unlink (tfile); 2632 } 2633