job.c revision 1.25.2.2
1 /* $NetBSD: job.c,v 1.25.2.2 2000/01/23 13:35:44 he 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 1.25.2.2 2000/01/23 13:35:44 he 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 1.25.2.2 2000/01/23 13:35:44 he 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_Full Return TRUE if the job table is filled. 85 * 86 * Job_Empty Return TRUE if the job table is completely 87 * empty. 88 * 89 * Job_ParseShell Given the line following a .SHELL target, parse 90 * the line as a shell specification. Returns 91 * FAILURE if the spec was incorrect. 92 * 93 * Job_Finish Perform any final processing which needs doing. 94 * This includes the execution of any commands 95 * which have been/were attached to the .END 96 * target. It should only be called when the 97 * job table is empty. 98 * 99 * Job_AbortAll Abort all currently running jobs. It doesn't 100 * handle output or do anything for the jobs, 101 * just kills them. It should only be called in 102 * an emergency, as it were. 103 * 104 * Job_CheckCommands Verify that the commands for a target are 105 * ok. Provide them if necessary and possible. 106 * 107 * Job_Touch Update a target without really updating it. 108 * 109 * Job_Wait Wait for all currently-running jobs to finish. 110 */ 111 112 #include <sys/types.h> 113 #include <sys/stat.h> 114 #include <sys/file.h> 115 #include <sys/time.h> 116 #include <sys/wait.h> 117 #include <fcntl.h> 118 #include <errno.h> 119 #include <utime.h> 120 #include <stdio.h> 121 #include <string.h> 122 #include <signal.h> 123 #include "make.h" 124 #include "hash.h" 125 #include "dir.h" 126 #include "job.h" 127 #include "pathnames.h" 128 #ifdef REMOTE 129 #include "rmt.h" 130 # define STATIC 131 #else 132 # define STATIC static 133 #endif 134 135 /* 136 * error handling variables 137 */ 138 static int errors = 0; /* number of errors reported */ 139 static int aborting = 0; /* why is the make aborting? */ 140 #define ABORT_ERROR 1 /* Because of an error */ 141 #define ABORT_INTERRUPT 2 /* Because it was interrupted */ 142 #define ABORT_WAIT 3 /* Waiting for jobs to finish */ 143 144 /* 145 * XXX: Avoid SunOS bug... FILENO() is fp->_file, and file 146 * is a char! So when we go above 127 we turn negative! 147 */ 148 #define FILENO(a) ((unsigned) fileno(a)) 149 150 /* 151 * post-make command processing. The node postCommands is really just the 152 * .END target but we keep it around to avoid having to search for it 153 * all the time. 154 */ 155 static GNode *postCommands; /* node containing commands to execute when 156 * everything else is done */ 157 static int numCommands; /* The number of commands actually printed 158 * for a target. Should this number be 159 * 0, no shell will be executed. */ 160 161 /* 162 * Return values from JobStart. 163 */ 164 #define JOB_RUNNING 0 /* Job is running */ 165 #define JOB_ERROR 1 /* Error in starting the job */ 166 #define JOB_FINISHED 2 /* The job is already finished */ 167 #define JOB_STOPPED 3 /* The job is stopped */ 168 169 /* 170 * tfile is the name of a file into which all shell commands are put. It is 171 * used over by removing it before the child shell is executed. The XXXXX in 172 * the string are replaced by the pid of the make process in a 5-character 173 * field with leading zeroes. 174 */ 175 static char tfile[] = TMPPAT; 176 177 178 /* 179 * Descriptions for various shells. 180 */ 181 static Shell shells[] = { 182 /* 183 * CSH description. The csh can do echo control by playing 184 * with the setting of the 'echo' shell variable. Sadly, 185 * however, it is unable to do error control nicely. 186 */ 187 { 188 "csh", 189 TRUE, "unset verbose", "set verbose", "unset verbose", 10, 190 FALSE, "echo \"%s\"\n", "csh -c \"%s || exit 0\"", 191 "v", "e", 192 }, 193 /* 194 * SH description. Echo control is also possible and, under 195 * sun UNIX anyway, one can even control error checking. 196 */ 197 { 198 "sh", 199 TRUE, "set -", "set -v", "set -", 5, 200 TRUE, "set -e", "set +e", 201 #ifdef OLDBOURNESHELL 202 FALSE, "echo \"%s\"\n", "sh -c '%s || exit 0'\n", 203 #endif 204 #ifdef __NetBSD__ 205 "vq", 206 #else 207 "v", 208 #endif 209 "e", 210 }, 211 /* 212 * UNKNOWN. 213 */ 214 { 215 (char *) 0, 216 FALSE, (char *) 0, (char *) 0, (char *) 0, 0, 217 FALSE, (char *) 0, (char *) 0, 218 (char *) 0, (char *) 0, 219 } 220 }; 221 static Shell *commandShell = &shells[DEFSHELL];/* this is the shell to 222 * which we pass all 223 * commands in the Makefile. 224 * It is set by the 225 * Job_ParseShell function */ 226 static char *shellPath = NULL, /* full pathname of 227 * executable image */ 228 *shellName = NULL, /* last component of shell */ 229 *shellArgv = NULL; /* Custom shell args */ 230 231 232 static int maxJobs; /* The most children we can run at once */ 233 static int maxLocal; /* The most local ones we can have */ 234 STATIC int nJobs; /* The number of children currently running */ 235 STATIC int nLocal; /* The number of local children */ 236 STATIC Lst jobs; /* The structures that describe them */ 237 STATIC Boolean jobFull; /* Flag to tell when the job table is full. It 238 * is set TRUE when (1) the total number of 239 * running jobs equals the maximum allowed or 240 * (2) a job can only be run locally, but 241 * nLocal equals maxLocal */ 242 #ifndef RMT_WILL_WATCH 243 static fd_set outputs; /* Set of descriptors of pipes connected to 244 * the output channels of children */ 245 #endif 246 247 STATIC GNode *lastNode; /* The node for which output was most recently 248 * produced. */ 249 STATIC char *targFmt; /* Format string to use to head output from a 250 * job when it's not the most-recent job heard 251 * from */ 252 253 #ifdef REMOTE 254 # define TARG_FMT "--- %s at %s ---\n" /* Default format */ 255 # define MESSAGE(fp, gn) \ 256 (void) fprintf(fp, targFmt, gn->name, gn->rem.hname); 257 #else 258 # define TARG_FMT "--- %s ---\n" /* Default format */ 259 # define MESSAGE(fp, gn) \ 260 (void) fprintf(fp, targFmt, gn->name); 261 #endif 262 263 /* 264 * When JobStart attempts to run a job remotely but can't, and isn't allowed 265 * to run the job locally, or when Job_CatchChildren detects a job that has 266 * been migrated home, the job is placed on the stoppedJobs queue to be run 267 * when the next job finishes. 268 */ 269 STATIC Lst stoppedJobs; /* Lst of Job structures describing 270 * jobs that were stopped due to concurrency 271 * limits or migration home */ 272 273 274 #if defined(USE_PGRP) && defined(SYSV) 275 # define KILL(pid, sig) kill(-(pid), (sig)) 276 #else 277 # if defined(USE_PGRP) 278 # define KILL(pid, sig) killpg((pid), (sig)) 279 # else 280 # define KILL(pid, sig) kill((pid), (sig)) 281 # endif 282 #endif 283 284 /* 285 * Grmpf... There is no way to set bits of the wait structure 286 * anymore with the stupid W*() macros. I liked the union wait 287 * stuff much more. So, we devise our own macros... This is 288 * really ugly, use dramamine sparingly. You have been warned. 289 */ 290 #ifndef W_STOPCODE 291 #define W_STOPCODE(sig) (((sig) << 8) | 0177) 292 #endif 293 #ifndef W_EXITCODE 294 #define W_EXITCODE(ret, sig) ((ret << 8) | (sig)) 295 #endif 296 297 static int JobCondPassSig __P((ClientData, ClientData)); 298 static void JobPassSig __P((int)); 299 static int JobCmpPid __P((ClientData, ClientData)); 300 static int JobPrintCommand __P((ClientData, ClientData)); 301 static int JobSaveCommand __P((ClientData, ClientData)); 302 static void JobClose __P((Job *)); 303 #ifdef REMOTE 304 static int JobCmpRmtID __P((Job *, int)); 305 # ifdef RMT_WILL_WATCH 306 static void JobLocalInput __P((int, Job *)); 307 # endif 308 #else 309 static void JobFinish __P((Job *, int *)); 310 static void JobExec __P((Job *, char **)); 311 #endif 312 static void JobMakeArgv __P((Job *, char **)); 313 static void JobRestart __P((Job *)); 314 static int JobStart __P((GNode *, int, Job *)); 315 static char *JobOutput __P((Job *, char *, char *, int)); 316 static void JobDoOutput __P((Job *, Boolean)); 317 static Shell *JobMatchShell __P((char *)); 318 static void JobInterrupt __P((int, int)); 319 static void JobRestartJobs __P((void)); 320 321 /*- 322 *----------------------------------------------------------------------- 323 * JobCondPassSig -- 324 * Pass a signal to a job if the job is remote or if USE_PGRP 325 * is defined. 326 * 327 * Results: 328 * === 0 329 * 330 * Side Effects: 331 * None, except the job may bite it. 332 * 333 *----------------------------------------------------------------------- 334 */ 335 static int 336 JobCondPassSig(jobp, signop) 337 ClientData jobp; /* Job to biff */ 338 ClientData signop; /* Signal to send it */ 339 { 340 Job *job = (Job *) jobp; 341 int signo = *(int *) signop; 342 #ifdef RMT_WANTS_SIGNALS 343 if (job->flags & JOB_REMOTE) { 344 (void) Rmt_Signal(job, signo); 345 } else { 346 KILL(job->pid, signo); 347 } 348 #else 349 /* 350 * Assume that sending the signal to job->pid will signal any remote 351 * job as well. 352 */ 353 if (DEBUG(JOB)) { 354 (void) fprintf(stdout, 355 "JobCondPassSig passing signal %d to child %d.\n", 356 signo, job->pid); 357 (void) fflush(stdout); 358 } 359 KILL(job->pid, signo); 360 #endif 361 return 0; 362 } 363 364 /*- 365 *----------------------------------------------------------------------- 366 * JobPassSig -- 367 * Pass a signal on to all remote jobs and to all local jobs if 368 * USE_PGRP is defined, then die ourselves. 369 * 370 * Results: 371 * None. 372 * 373 * Side Effects: 374 * We die by the same signal. 375 * 376 *----------------------------------------------------------------------- 377 */ 378 static void 379 JobPassSig(signo) 380 int signo; /* The signal number we've received */ 381 { 382 sigset_t nmask, omask; 383 struct sigaction act; 384 int sigcont; 385 386 if (DEBUG(JOB)) { 387 (void) fprintf(stdout, "JobPassSig(%d) called.\n", signo); 388 (void) fflush(stdout); 389 } 390 Lst_ForEach(jobs, JobCondPassSig, (ClientData) &signo); 391 392 /* 393 * Deal with proper cleanup based on the signal received. We only run 394 * the .INTERRUPT target if the signal was in fact an interrupt. The other 395 * three termination signals are more of a "get out *now*" command. 396 */ 397 if (signo == SIGINT) { 398 JobInterrupt(TRUE, signo); 399 } else if ((signo == SIGHUP) || (signo == SIGTERM) || (signo == SIGQUIT)) { 400 JobInterrupt(FALSE, signo); 401 } 402 403 /* 404 * Leave gracefully if SIGQUIT, rather than core dumping. 405 */ 406 if (signo == SIGQUIT) { 407 Finish(0); 408 } 409 410 /* 411 * Send ourselves the signal now we've given the message to everyone else. 412 * Note we block everything else possible while we're getting the signal. 413 * This ensures that all our jobs get continued when we wake up before 414 * we take any other signal. 415 */ 416 sigfillset(&nmask); 417 sigprocmask(SIG_SETMASK, &nmask, &omask); 418 act.sa_handler = SIG_DFL; 419 sigemptyset(&act.sa_mask); 420 act.sa_flags = 0; 421 sigaction(signo, &act, NULL); 422 423 if (DEBUG(JOB)) { 424 (void) fprintf(stdout, 425 "JobPassSig passing signal to self, mask = %x.\n", 426 ~0 & ~(1 << (signo-1))); 427 (void) fflush(stdout); 428 } 429 430 (void) kill(getpid(), signo); 431 if (signo != SIGTSTP) { 432 sigcont = SIGCONT; 433 Lst_ForEach(jobs, JobCondPassSig, (ClientData) &sigcont); 434 } 435 436 (void) sigprocmask(SIG_SETMASK, &omask, NULL); 437 sigprocmask(SIG_SETMASK, &omask, NULL); 438 if (signo != SIGCONT && signo != SIGTSTP) { 439 act.sa_handler = JobPassSig; 440 sigaction(sigcont, &act, NULL); 441 } 442 } 443 444 /*- 445 *----------------------------------------------------------------------- 446 * JobCmpPid -- 447 * Compare the pid of the job with the given pid and return 0 if they 448 * are equal. This function is called from Job_CatchChildren via 449 * Lst_Find to find the job descriptor of the finished job. 450 * 451 * Results: 452 * 0 if the pid's match 453 * 454 * Side Effects: 455 * None 456 *----------------------------------------------------------------------- 457 */ 458 static int 459 JobCmpPid(job, pid) 460 ClientData job; /* job to examine */ 461 ClientData pid; /* process id desired */ 462 { 463 return *(int *) pid - ((Job *) job)->pid; 464 } 465 466 #ifdef REMOTE 467 /*- 468 *----------------------------------------------------------------------- 469 * JobCmpRmtID -- 470 * Compare the rmtID of the job with the given rmtID and return 0 if they 471 * are equal. 472 * 473 * Results: 474 * 0 if the rmtID's match 475 * 476 * Side Effects: 477 * None. 478 *----------------------------------------------------------------------- 479 */ 480 static int 481 JobCmpRmtID(job, rmtID) 482 ClientData job; /* job to examine */ 483 ClientData rmtID; /* remote id desired */ 484 { 485 return(*(int *) rmtID - *(int *) job->rmtID); 486 } 487 #endif 488 489 /*- 490 *----------------------------------------------------------------------- 491 * JobPrintCommand -- 492 * Put out another command for the given job. If the command starts 493 * with an @ or a - we process it specially. In the former case, 494 * so long as the -s and -n flags weren't given to make, we stick 495 * a shell-specific echoOff command in the script. In the latter, 496 * we ignore errors for the entire job, unless the shell has error 497 * control. 498 * If the command is just "..." we take all future commands for this 499 * job to be commands to be executed once the entire graph has been 500 * made and return non-zero to signal that the end of the commands 501 * was reached. These commands are later attached to the postCommands 502 * node and executed by Job_End when all things are done. 503 * This function is called from JobStart via Lst_ForEach. 504 * 505 * Results: 506 * Always 0, unless the command was "..." 507 * 508 * Side Effects: 509 * If the command begins with a '-' and the shell has no error control, 510 * the JOB_IGNERR flag is set in the job descriptor. 511 * If the command is "..." and we're not ignoring such things, 512 * tailCmds is set to the successor node of the cmd. 513 * numCommands is incremented if the command is actually printed. 514 *----------------------------------------------------------------------- 515 */ 516 static int 517 JobPrintCommand(cmdp, jobp) 518 ClientData cmdp; /* command string to print */ 519 ClientData jobp; /* job for which to print it */ 520 { 521 Boolean noSpecials; /* true if we shouldn't worry about 522 * inserting special commands into 523 * the input stream. */ 524 Boolean shutUp = FALSE; /* true if we put a no echo command 525 * into the command file */ 526 Boolean errOff = FALSE; /* true if we turned error checking 527 * off before printing the command 528 * and need to turn it back on */ 529 char *cmdTemplate; /* Template to use when printing the 530 * command */ 531 char *cmdStart; /* Start of expanded command */ 532 LstNode cmdNode; /* Node for replacing the command */ 533 char *cmd = (char *) cmdp; 534 Job *job = (Job *) jobp; 535 536 noSpecials = noExecute && !(job->node->type & OP_MAKE); 537 538 if (strcmp(cmd, "...") == 0) { 539 job->node->type |= OP_SAVE_CMDS; 540 if ((job->flags & JOB_IGNDOTS) == 0) { 541 job->tailCmds = Lst_Succ(Lst_Member(job->node->commands, 542 (ClientData)cmd)); 543 return 1; 544 } 545 return 0; 546 } 547 548 #define DBPRINTF(fmt, arg) if (DEBUG(JOB)) { \ 549 (void) fprintf(stdout, fmt, arg); \ 550 (void) fflush(stdout); \ 551 } \ 552 (void) fprintf(job->cmdFILE, fmt, arg); \ 553 (void) fflush(job->cmdFILE); 554 555 numCommands += 1; 556 557 /* 558 * For debugging, we replace each command with the result of expanding 559 * the variables in the command. 560 */ 561 cmdNode = Lst_Member(job->node->commands, (ClientData)cmd); 562 cmdStart = cmd = Var_Subst(NULL, cmd, job->node, FALSE); 563 Lst_Replace(cmdNode, (ClientData)cmdStart); 564 565 cmdTemplate = "%s\n"; 566 567 /* 568 * Check for leading @' and -'s to control echoing and error checking. 569 */ 570 while (*cmd == '@' || *cmd == '-') { 571 if (*cmd == '@') { 572 shutUp = TRUE; 573 } else { 574 errOff = TRUE; 575 } 576 cmd++; 577 } 578 579 while (isspace((unsigned char) *cmd)) 580 cmd++; 581 582 if (shutUp) { 583 if (!(job->flags & JOB_SILENT) && !noSpecials && 584 commandShell->hasEchoCtl) { 585 DBPRINTF("%s\n", commandShell->echoOff); 586 } else { 587 shutUp = FALSE; 588 } 589 } 590 591 if (errOff) { 592 if ( !(job->flags & JOB_IGNERR) && !noSpecials) { 593 if (commandShell->hasErrCtl) { 594 /* 595 * we don't want the error-control commands showing 596 * up either, so we turn off echoing while executing 597 * them. We could put another field in the shell 598 * structure to tell JobDoOutput to look for this 599 * string too, but why make it any more complex than 600 * it already is? 601 */ 602 if (!(job->flags & JOB_SILENT) && !shutUp && 603 commandShell->hasEchoCtl) { 604 DBPRINTF("%s\n", commandShell->echoOff); 605 DBPRINTF("%s\n", commandShell->ignErr); 606 DBPRINTF("%s\n", commandShell->echoOn); 607 } else { 608 DBPRINTF("%s\n", commandShell->ignErr); 609 } 610 } else if (commandShell->ignErr && 611 (*commandShell->ignErr != '\0')) 612 { 613 /* 614 * The shell has no error control, so we need to be 615 * weird to get it to ignore any errors from the command. 616 * If echoing is turned on, we turn it off and use the 617 * errCheck template to echo the command. Leave echoing 618 * off so the user doesn't see the weirdness we go through 619 * to ignore errors. Set cmdTemplate to use the weirdness 620 * instead of the simple "%s\n" template. 621 */ 622 if (!(job->flags & JOB_SILENT) && !shutUp && 623 commandShell->hasEchoCtl) { 624 DBPRINTF("%s\n", commandShell->echoOff); 625 DBPRINTF(commandShell->errCheck, cmd); 626 shutUp = TRUE; 627 } 628 cmdTemplate = commandShell->ignErr; 629 /* 630 * The error ignoration (hee hee) is already taken care 631 * of by the ignErr template, so pretend error checking 632 * is still on. 633 */ 634 errOff = FALSE; 635 } else { 636 errOff = FALSE; 637 } 638 } else { 639 errOff = FALSE; 640 } 641 } 642 643 DBPRINTF(cmdTemplate, cmd); 644 free(cmdStart); 645 646 if (errOff) { 647 /* 648 * If echoing is already off, there's no point in issuing the 649 * echoOff command. Otherwise we issue it and pretend it was on 650 * for the whole command... 651 */ 652 if (!shutUp && !(job->flags & JOB_SILENT) && commandShell->hasEchoCtl){ 653 DBPRINTF("%s\n", commandShell->echoOff); 654 shutUp = TRUE; 655 } 656 DBPRINTF("%s\n", commandShell->errCheck); 657 } 658 if (shutUp) { 659 DBPRINTF("%s\n", commandShell->echoOn); 660 } 661 return 0; 662 } 663 664 /*- 665 *----------------------------------------------------------------------- 666 * JobSaveCommand -- 667 * Save a command to be executed when everything else is done. 668 * Callback function for JobFinish... 669 * 670 * Results: 671 * Always returns 0 672 * 673 * Side Effects: 674 * The command is tacked onto the end of postCommands's commands list. 675 * 676 *----------------------------------------------------------------------- 677 */ 678 static int 679 JobSaveCommand(cmd, gn) 680 ClientData cmd; 681 ClientData gn; 682 { 683 cmd = (ClientData) Var_Subst(NULL, (char *) cmd, (GNode *) gn, FALSE); 684 (void) Lst_AtEnd(postCommands->commands, cmd); 685 return(0); 686 } 687 688 689 /*- 690 *----------------------------------------------------------------------- 691 * JobClose -- 692 * Called to close both input and output pipes when a job is finished. 693 * 694 * Results: 695 * Nada 696 * 697 * Side Effects: 698 * The file descriptors associated with the job are closed. 699 * 700 *----------------------------------------------------------------------- 701 */ 702 static void 703 JobClose(job) 704 Job *job; 705 { 706 if (usePipes) { 707 #ifdef RMT_WILL_WATCH 708 Rmt_Ignore(job->inPipe); 709 #else 710 FD_CLR(job->inPipe, &outputs); 711 #endif 712 if (job->outPipe != job->inPipe) { 713 (void) close(job->outPipe); 714 } 715 JobDoOutput(job, TRUE); 716 (void) close(job->inPipe); 717 } else { 718 (void) close(job->outFd); 719 JobDoOutput(job, TRUE); 720 } 721 } 722 723 /*- 724 *----------------------------------------------------------------------- 725 * JobFinish -- 726 * Do final processing for the given job including updating 727 * parents and starting new jobs as available/necessary. Note 728 * that we pay no attention to the JOB_IGNERR flag here. 729 * This is because when we're called because of a noexecute flag 730 * or something, jstat.w_status is 0 and when called from 731 * Job_CatchChildren, the status is zeroed if it s/b ignored. 732 * 733 * Results: 734 * None 735 * 736 * Side Effects: 737 * Some nodes may be put on the toBeMade queue. 738 * Final commands for the job are placed on postCommands. 739 * 740 * If we got an error and are aborting (aborting == ABORT_ERROR) and 741 * the job list is now empty, we are done for the day. 742 * If we recognized an error (errors !=0), we set the aborting flag 743 * to ABORT_ERROR so no more jobs will be started. 744 *----------------------------------------------------------------------- 745 */ 746 /*ARGSUSED*/ 747 static void 748 JobFinish(job, status) 749 Job *job; /* job to finish */ 750 int *status; /* sub-why job went away */ 751 { 752 Boolean done; 753 754 if ((WIFEXITED(*status) && 755 (((WEXITSTATUS(*status) != 0) && !(job->flags & JOB_IGNERR)))) || 756 WIFSIGNALED(*status)) 757 { 758 /* 759 * If it exited non-zero and either we're doing things our 760 * way or we're not ignoring errors, the job is finished. 761 * Similarly, if the shell died because of a signal 762 * the job is also finished. In these 763 * cases, finish out the job's output before printing the exit 764 * status... 765 */ 766 #ifdef REMOTE 767 KILL(job->pid, SIGCONT); 768 #endif 769 JobClose(job); 770 if (job->cmdFILE != NULL && job->cmdFILE != stdout) { 771 (void) fclose(job->cmdFILE); 772 } 773 done = TRUE; 774 #ifdef REMOTE 775 if (job->flags & JOB_REMOTE) 776 Rmt_Done(job->rmtID, job->node); 777 #endif 778 } else if (WIFEXITED(*status)) { 779 /* 780 * Deal with ignored errors in -B mode. We need to print a message 781 * telling of the ignored error as well as setting status.w_status 782 * to 0 so the next command gets run. To do this, we set done to be 783 * TRUE if in -B mode and the job exited non-zero. 784 */ 785 done = WEXITSTATUS(*status) != 0; 786 /* 787 * Old comment said: "Note we don't 788 * want to close down any of the streams until we know we're at the 789 * end." 790 * But we do. Otherwise when are we going to print the rest of the 791 * stuff? 792 */ 793 JobClose(job); 794 #ifdef REMOTE 795 if (job->flags & JOB_REMOTE) 796 Rmt_Done(job->rmtID, job->node); 797 #endif /* REMOTE */ 798 } else { 799 /* 800 * No need to close things down or anything. 801 */ 802 done = FALSE; 803 } 804 805 if (done || 806 WIFSTOPPED(*status) || 807 (WIFSIGNALED(*status) && (WTERMSIG(*status) == SIGCONT))) 808 { 809 FILE *out; 810 811 if (compatMake && !usePipes && (job->flags & JOB_IGNERR)) { 812 /* 813 * If output is going to a file and this job is ignoring 814 * errors, arrange to have the exit status sent to the 815 * output file as well. 816 */ 817 out = fdopen(job->outFd, "w"); 818 } else { 819 out = stdout; 820 } 821 822 if (WIFEXITED(*status)) { 823 if (DEBUG(JOB)) { 824 (void) fprintf(stdout, "Process %d exited.\n", job->pid); 825 (void) fflush(stdout); 826 } 827 if (WEXITSTATUS(*status) != 0) { 828 if (usePipes && job->node != lastNode) { 829 MESSAGE(out, job->node); 830 lastNode = job->node; 831 } 832 (void) fprintf(out, "*** Error code %d%s\n", 833 WEXITSTATUS(*status), 834 (job->flags & JOB_IGNERR) ? "(ignored)" : ""); 835 836 if (job->flags & JOB_IGNERR) { 837 *status = 0; 838 } 839 } else if (DEBUG(JOB)) { 840 if (usePipes && job->node != lastNode) { 841 MESSAGE(out, job->node); 842 lastNode = job->node; 843 } 844 (void) fprintf(out, "*** Completed successfully\n"); 845 } 846 } else if (WIFSTOPPED(*status) && WSTOPSIG(*status) != SIGCONT) { 847 if (DEBUG(JOB)) { 848 (void) fprintf(stdout, "Process %d stopped.\n", job->pid); 849 (void) fflush(stdout); 850 } 851 if (usePipes && job->node != lastNode) { 852 MESSAGE(out, job->node); 853 lastNode = job->node; 854 } 855 if (!(job->flags & JOB_REMIGRATE)) { 856 switch (WSTOPSIG(*status)) { 857 case SIGTSTP: 858 (void) fprintf(out, "*** Suspended\n"); 859 break; 860 case SIGSTOP: 861 (void) fprintf(out, "*** Stopped\n"); 862 break; 863 default: 864 (void) fprintf(out, "*** Stopped -- signal %d\n", 865 WSTOPSIG(*status)); 866 } 867 } 868 job->flags |= JOB_RESUME; 869 (void)Lst_AtEnd(stoppedJobs, (ClientData)job); 870 #ifdef REMOTE 871 if (job->flags & JOB_REMIGRATE) 872 JobRestart(job); 873 #endif 874 (void) fflush(out); 875 return; 876 } else if (WIFSTOPPED(*status) && WSTOPSIG(*status) == SIGCONT) { 877 /* 878 * If the beastie has continued, shift the Job from the stopped 879 * list to the running one (or re-stop it if concurrency is 880 * exceeded) and go and get another child. 881 */ 882 if (job->flags & (JOB_RESUME|JOB_REMIGRATE|JOB_RESTART)) { 883 if (usePipes && job->node != lastNode) { 884 MESSAGE(out, job->node); 885 lastNode = job->node; 886 } 887 (void) fprintf(out, "*** Continued\n"); 888 } 889 if (!(job->flags & JOB_CONTINUING)) { 890 if (DEBUG(JOB)) { 891 (void) fprintf(stdout, 892 "Warning: process %d was not continuing.\n", 893 job->pid); 894 (void) fflush(stdout); 895 } 896 #ifdef notdef 897 /* 898 * We don't really want to restart a job from scratch just 899 * because it continued, especially not without killing the 900 * continuing process! That's why this is ifdef'ed out. 901 * FD - 9/17/90 902 */ 903 JobRestart(job); 904 #endif 905 } 906 job->flags &= ~JOB_CONTINUING; 907 Lst_AtEnd(jobs, (ClientData)job); 908 nJobs += 1; 909 if (!(job->flags & JOB_REMOTE)) { 910 if (DEBUG(JOB)) { 911 (void) fprintf(stdout, 912 "Process %d is continuing locally.\n", 913 job->pid); 914 (void) fflush(stdout); 915 } 916 nLocal += 1; 917 } 918 if (nJobs == maxJobs) { 919 jobFull = TRUE; 920 if (DEBUG(JOB)) { 921 (void) fprintf(stdout, "Job queue is full.\n"); 922 (void) fflush(stdout); 923 } 924 } 925 (void) fflush(out); 926 return; 927 } else { 928 if (usePipes && job->node != lastNode) { 929 MESSAGE(out, job->node); 930 lastNode = job->node; 931 } 932 (void) fprintf(out, "*** Signal %d\n", WTERMSIG(*status)); 933 } 934 935 (void) fflush(out); 936 } 937 938 /* 939 * Now handle the -B-mode stuff. If the beast still isn't finished, 940 * try and restart the job on the next command. If JobStart says it's 941 * ok, it's ok. If there's an error, this puppy is done. 942 */ 943 if (compatMake && (WIFEXITED(*status) && 944 !Lst_IsAtEnd(job->node->commands))) { 945 switch (JobStart(job->node, job->flags & JOB_IGNDOTS, job)) { 946 case JOB_RUNNING: 947 done = FALSE; 948 break; 949 case JOB_ERROR: 950 done = TRUE; 951 *status = W_EXITCODE(1, 0); 952 break; 953 case JOB_FINISHED: 954 /* 955 * If we got back a JOB_FINISHED code, JobStart has already 956 * called Make_Update and freed the job descriptor. We set 957 * done to false here to avoid fake cycles and double frees. 958 * JobStart needs to do the update so we can proceed up the 959 * graph when given the -n flag.. 960 */ 961 done = FALSE; 962 break; 963 } 964 } else { 965 done = TRUE; 966 } 967 968 969 if (done && 970 (aborting != ABORT_ERROR) && 971 (aborting != ABORT_INTERRUPT) && 972 (*status == 0)) 973 { 974 /* 975 * As long as we aren't aborting and the job didn't return a non-zero 976 * status that we shouldn't ignore, we call Make_Update to update 977 * the parents. In addition, any saved commands for the node are placed 978 * on the .END target. 979 */ 980 if (job->tailCmds != NILLNODE) { 981 Lst_ForEachFrom(job->node->commands, job->tailCmds, 982 JobSaveCommand, 983 (ClientData)job->node); 984 } 985 job->node->made = MADE; 986 Make_Update(job->node); 987 free((Address)job); 988 } else if (*status != 0) { 989 errors += 1; 990 free((Address)job); 991 } 992 993 JobRestartJobs(); 994 995 /* 996 * Set aborting if any error. 997 */ 998 if (errors && !keepgoing && (aborting != ABORT_INTERRUPT)) { 999 /* 1000 * If we found any errors in this batch of children and the -k flag 1001 * wasn't given, we set the aborting flag so no more jobs get 1002 * started. 1003 */ 1004 aborting = ABORT_ERROR; 1005 } 1006 1007 if ((aborting == ABORT_ERROR) && Job_Empty()) { 1008 /* 1009 * If we are aborting and the job table is now empty, we finish. 1010 */ 1011 Finish(errors); 1012 } 1013 } 1014 1015 /*- 1016 *----------------------------------------------------------------------- 1017 * Job_Touch -- 1018 * Touch the given target. Called by JobStart when the -t flag was 1019 * given 1020 * 1021 * Results: 1022 * None 1023 * 1024 * Side Effects: 1025 * The data modification of the file is changed. In addition, if the 1026 * file did not exist, it is created. 1027 *----------------------------------------------------------------------- 1028 */ 1029 void 1030 Job_Touch(gn, silent) 1031 GNode *gn; /* the node of the file to touch */ 1032 Boolean silent; /* TRUE if should not print messages */ 1033 { 1034 int streamID; /* ID of stream opened to do the touch */ 1035 struct utimbuf times; /* Times for utime() call */ 1036 1037 if (gn->type & (OP_JOIN|OP_USE|OP_EXEC|OP_OPTIONAL|OP_PHONY)) { 1038 /* 1039 * .JOIN, .USE, .ZEROTIME and .OPTIONAL targets are "virtual" targets 1040 * and, as such, shouldn't really be created. 1041 */ 1042 return; 1043 } 1044 1045 if (!silent || (noExecute && !(gn->type & OP_MAKE))) { 1046 (void) fprintf(stdout, "touch %s\n", gn->name); 1047 (void) fflush(stdout); 1048 } 1049 1050 if (noExecute && !(gn->type & OP_MAKE)) { 1051 return; 1052 } 1053 1054 if (gn->type & OP_ARCHV) { 1055 Arch_Touch(gn); 1056 } else if (gn->type & OP_LIB) { 1057 Arch_TouchLib(gn); 1058 } else { 1059 char *file = gn->path ? gn->path : gn->name; 1060 1061 times.actime = times.modtime = now; 1062 if (utime(file, ×) < 0){ 1063 streamID = open(file, O_RDWR | O_CREAT, 0666); 1064 1065 if (streamID >= 0) { 1066 char c; 1067 1068 /* 1069 * Read and write a byte to the file to change the 1070 * modification time, then close the file. 1071 */ 1072 if (read(streamID, &c, 1) == 1) { 1073 (void) lseek(streamID, (off_t)0, SEEK_SET); 1074 (void) write(streamID, &c, 1); 1075 } 1076 1077 (void) close(streamID); 1078 } else { 1079 (void) fprintf(stdout, "*** couldn't touch %s: %s", 1080 file, strerror(errno)); 1081 (void) fflush(stdout); 1082 } 1083 } 1084 } 1085 } 1086 1087 /*- 1088 *----------------------------------------------------------------------- 1089 * Job_CheckCommands -- 1090 * Make sure the given node has all the commands it needs. 1091 * 1092 * Results: 1093 * TRUE if the commands list is/was ok. 1094 * 1095 * Side Effects: 1096 * The node will have commands from the .DEFAULT rule added to it 1097 * if it needs them. 1098 *----------------------------------------------------------------------- 1099 */ 1100 Boolean 1101 Job_CheckCommands(gn, abortProc) 1102 GNode *gn; /* The target whose commands need 1103 * verifying */ 1104 void (*abortProc) __P((char *, ...)); 1105 /* Function to abort with message */ 1106 { 1107 if (OP_NOP(gn->type) && Lst_IsEmpty(gn->commands) && 1108 (gn->type & OP_LIB) == 0) { 1109 /* 1110 * No commands. Look for .DEFAULT rule from which we might infer 1111 * commands 1112 */ 1113 if ((DEFAULT != NILGNODE) && !Lst_IsEmpty(DEFAULT->commands)) { 1114 char *p1; 1115 /* 1116 * Make only looks for a .DEFAULT if the node was never the 1117 * target of an operator, so that's what we do too. If 1118 * a .DEFAULT was given, we substitute its commands for gn's 1119 * commands and set the IMPSRC variable to be the target's name 1120 * The DEFAULT node acts like a transformation rule, in that 1121 * gn also inherits any attributes or sources attached to 1122 * .DEFAULT itself. 1123 */ 1124 Make_HandleUse(DEFAULT, gn); 1125 Var_Set(IMPSRC, Var_Value(TARGET, gn, &p1), gn); 1126 if (p1) 1127 free(p1); 1128 } else if (Dir_MTime(gn) == 0) { 1129 /* 1130 * The node wasn't the target of an operator we have no .DEFAULT 1131 * rule to go on and the target doesn't already exist. There's 1132 * nothing more we can do for this branch. If the -k flag wasn't 1133 * given, we stop in our tracks, otherwise we just don't update 1134 * this node's parents so they never get examined. 1135 */ 1136 static const char msg[] = "make: don't know how to make"; 1137 1138 if (gn->type & OP_OPTIONAL) { 1139 (void) fprintf(stdout, "%s %s(ignored)\n", msg, gn->name); 1140 (void) fflush(stdout); 1141 } else if (keepgoing) { 1142 (void) fprintf(stdout, "%s %s(continuing)\n", msg, gn->name); 1143 (void) fflush(stdout); 1144 return FALSE; 1145 } else { 1146 (*abortProc)("%s %s. Stop", msg, gn->name); 1147 return FALSE; 1148 } 1149 } 1150 } 1151 return TRUE; 1152 } 1153 #ifdef RMT_WILL_WATCH 1154 /*- 1155 *----------------------------------------------------------------------- 1156 * JobLocalInput -- 1157 * Handle a pipe becoming readable. Callback function for Rmt_Watch 1158 * 1159 * Results: 1160 * None 1161 * 1162 * Side Effects: 1163 * JobDoOutput is called. 1164 * 1165 *----------------------------------------------------------------------- 1166 */ 1167 /*ARGSUSED*/ 1168 static void 1169 JobLocalInput(stream, job) 1170 int stream; /* Stream that's ready (ignored) */ 1171 Job *job; /* Job to which the stream belongs */ 1172 { 1173 JobDoOutput(job, FALSE); 1174 } 1175 #endif /* RMT_WILL_WATCH */ 1176 1177 /*- 1178 *----------------------------------------------------------------------- 1179 * JobExec -- 1180 * Execute the shell for the given job. Called from JobStart and 1181 * JobRestart. 1182 * 1183 * Results: 1184 * None. 1185 * 1186 * Side Effects: 1187 * A shell is executed, outputs is altered and the Job structure added 1188 * to the job table. 1189 * 1190 *----------------------------------------------------------------------- 1191 */ 1192 static void 1193 JobExec(job, argv) 1194 Job *job; /* Job to execute */ 1195 char **argv; 1196 { 1197 int cpid; /* ID of new child */ 1198 1199 if (DEBUG(JOB)) { 1200 int i; 1201 1202 (void) fprintf(stdout, "Running %s %sly\n", job->node->name, 1203 job->flags&JOB_REMOTE?"remote":"local"); 1204 (void) fprintf(stdout, "\tCommand: "); 1205 for (i = 0; argv[i] != NULL; i++) { 1206 (void) fprintf(stdout, "%s ", argv[i]); 1207 } 1208 (void) fprintf(stdout, "\n"); 1209 (void) fflush(stdout); 1210 } 1211 1212 /* 1213 * Some jobs produce no output and it's disconcerting to have 1214 * no feedback of their running (since they produce no output, the 1215 * banner with their name in it never appears). This is an attempt to 1216 * provide that feedback, even if nothing follows it. 1217 */ 1218 if ((lastNode != job->node) && (job->flags & JOB_FIRST) && 1219 !(job->flags & JOB_SILENT)) { 1220 MESSAGE(stdout, job->node); 1221 lastNode = job->node; 1222 } 1223 1224 #ifdef RMT_NO_EXEC 1225 if (job->flags & JOB_REMOTE) { 1226 goto jobExecFinish; 1227 } 1228 #endif /* RMT_NO_EXEC */ 1229 1230 if ((cpid = vfork()) == -1) { 1231 Punt("Cannot fork"); 1232 } else if (cpid == 0) { 1233 1234 /* 1235 * Must duplicate the input stream down to the child's input and 1236 * reset it to the beginning (again). Since the stream was marked 1237 * close-on-exec, we must clear that bit in the new input. 1238 */ 1239 if (dup2(FILENO(job->cmdFILE), 0) == -1) 1240 Punt("Cannot dup2: %s", strerror(errno)); 1241 (void) fcntl(0, F_SETFD, 0); 1242 (void) lseek(0, (off_t)0, SEEK_SET); 1243 1244 if (usePipes) { 1245 /* 1246 * Set up the child's output to be routed through the pipe 1247 * we've created for it. 1248 */ 1249 if (dup2(job->outPipe, 1) == -1) 1250 Punt("Cannot dup2: %s", strerror(errno)); 1251 } else { 1252 /* 1253 * We're capturing output in a file, so we duplicate the 1254 * descriptor to the temporary file into the standard 1255 * output. 1256 */ 1257 if (dup2(job->outFd, 1) == -1) 1258 Punt("Cannot dup2: %s", strerror(errno)); 1259 } 1260 /* 1261 * The output channels are marked close on exec. This bit was 1262 * duplicated by the dup2 (on some systems), so we have to clear 1263 * it before routing the shell's error output to the same place as 1264 * its standard output. 1265 */ 1266 (void) fcntl(1, F_SETFD, 0); 1267 if (dup2(1, 2) == -1) 1268 Punt("Cannot dup2: %s", strerror(errno)); 1269 1270 #ifdef USE_PGRP 1271 /* 1272 * We want to switch the child into a different process family so 1273 * we can kill it and all its descendants in one fell swoop, 1274 * by killing its process family, but not commit suicide. 1275 */ 1276 # if defined(SYSV) 1277 (void) setsid(); 1278 # else 1279 (void) setpgid(0, getpid()); 1280 # endif 1281 #endif /* USE_PGRP */ 1282 1283 #ifdef REMOTE 1284 if (job->flags & JOB_REMOTE) { 1285 Rmt_Exec(shellPath, argv, FALSE); 1286 } else 1287 #endif /* REMOTE */ 1288 (void) execv(shellPath, argv); 1289 1290 (void) write(2, "Could not execute shell\n", 1291 sizeof("Could not execute shell")); 1292 _exit(1); 1293 } else { 1294 #ifdef REMOTE 1295 sigset_t nmask, omask; 1296 sigemptyset(&nmask); 1297 sigaddset(&nmask, SIGCHLD); 1298 sigprocmask(SIG_BLOCK, &nmask, &omask); 1299 #endif 1300 job->pid = cpid; 1301 1302 if (usePipes && (job->flags & JOB_FIRST) ) { 1303 /* 1304 * The first time a job is run for a node, we set the current 1305 * position in the buffer to the beginning and mark another 1306 * stream to watch in the outputs mask 1307 */ 1308 job->curPos = 0; 1309 1310 #ifdef RMT_WILL_WATCH 1311 Rmt_Watch(job->inPipe, JobLocalInput, job); 1312 #else 1313 FD_SET(job->inPipe, &outputs); 1314 #endif /* RMT_WILL_WATCH */ 1315 } 1316 1317 if (job->flags & JOB_REMOTE) { 1318 #ifndef REMOTE 1319 job->rmtID = 0; 1320 #else 1321 job->rmtID = Rmt_LastID(job->pid); 1322 #endif /* REMOTE */ 1323 } else { 1324 nLocal += 1; 1325 /* 1326 * XXX: Used to not happen if REMOTE. Why? 1327 */ 1328 if (job->cmdFILE != NULL && job->cmdFILE != stdout) { 1329 (void) fclose(job->cmdFILE); 1330 job->cmdFILE = NULL; 1331 } 1332 } 1333 #ifdef REMOTE 1334 sigprocmask(SIG_SETMASK, &omask, NULL); 1335 #endif 1336 } 1337 1338 #ifdef RMT_NO_EXEC 1339 jobExecFinish: 1340 #endif 1341 /* 1342 * Now the job is actually running, add it to the table. 1343 */ 1344 nJobs += 1; 1345 (void) Lst_AtEnd(jobs, (ClientData)job); 1346 if (nJobs == maxJobs) { 1347 jobFull = TRUE; 1348 } 1349 } 1350 1351 /*- 1352 *----------------------------------------------------------------------- 1353 * JobMakeArgv -- 1354 * Create the argv needed to execute the shell for a given job. 1355 * 1356 * 1357 * Results: 1358 * 1359 * Side Effects: 1360 * 1361 *----------------------------------------------------------------------- 1362 */ 1363 static void 1364 JobMakeArgv(job, argv) 1365 Job *job; 1366 char **argv; 1367 { 1368 int argc; 1369 static char args[10]; /* For merged arguments */ 1370 1371 argv[0] = shellName; 1372 argc = 1; 1373 1374 if ((commandShell->exit && (*commandShell->exit != '-')) || 1375 (commandShell->echo && (*commandShell->echo != '-'))) 1376 { 1377 /* 1378 * At least one of the flags doesn't have a minus before it, so 1379 * merge them together. Have to do this because the *(&(@*#*&#$# 1380 * Bourne shell thinks its second argument is a file to source. 1381 * Grrrr. Note the ten-character limitation on the combined arguments. 1382 */ 1383 (void)snprintf(args, sizeof(args), "-%s%s", 1384 ((job->flags & JOB_IGNERR) ? "" : 1385 (commandShell->exit ? commandShell->exit : "")), 1386 ((job->flags & JOB_SILENT) ? "" : 1387 (commandShell->echo ? commandShell->echo : ""))); 1388 1389 if (args[1]) { 1390 argv[argc] = args; 1391 argc++; 1392 } 1393 } else { 1394 if (!(job->flags & JOB_IGNERR) && commandShell->exit) { 1395 argv[argc] = commandShell->exit; 1396 argc++; 1397 } 1398 if (!(job->flags & JOB_SILENT) && commandShell->echo) { 1399 argv[argc] = commandShell->echo; 1400 argc++; 1401 } 1402 } 1403 argv[argc] = NULL; 1404 } 1405 1406 /*- 1407 *----------------------------------------------------------------------- 1408 * JobRestart -- 1409 * Restart a job that stopped for some reason. 1410 * 1411 * Results: 1412 * None. 1413 * 1414 * Side Effects: 1415 * jobFull will be set if the job couldn't be run. 1416 * 1417 *----------------------------------------------------------------------- 1418 */ 1419 static void 1420 JobRestart(job) 1421 Job *job; /* Job to restart */ 1422 { 1423 #ifdef REMOTE 1424 int host; 1425 #endif 1426 1427 if (job->flags & JOB_REMIGRATE) { 1428 if ( 1429 #ifdef REMOTE 1430 verboseRemigrates || 1431 #endif 1432 DEBUG(JOB)) { 1433 (void) fprintf(stdout, "*** remigrating %x(%s)\n", 1434 job->pid, job->node->name); 1435 (void) fflush(stdout); 1436 } 1437 1438 #ifdef REMOTE 1439 if (!Rmt_ReExport(job->pid, job->node, &host)) { 1440 if (verboseRemigrates || DEBUG(JOB)) { 1441 (void) fprintf(stdout, "*** couldn't migrate...\n"); 1442 (void) fflush(stdout); 1443 } 1444 #endif 1445 if (nLocal != maxLocal) { 1446 /* 1447 * Job cannot be remigrated, but there's room on the local 1448 * machine, so resume the job and note that another 1449 * local job has started. 1450 */ 1451 if ( 1452 #ifdef REMOTE 1453 verboseRemigrates || 1454 #endif 1455 DEBUG(JOB)) { 1456 (void) fprintf(stdout, "*** resuming on local machine\n"); 1457 (void) fflush(stdout); 1458 } 1459 KILL(job->pid, SIGCONT); 1460 nLocal +=1; 1461 #ifdef REMOTE 1462 job->flags &= ~(JOB_REMIGRATE|JOB_RESUME|JOB_REMOTE); 1463 job->flags |= JOB_CONTINUING; 1464 #else 1465 job->flags &= ~(JOB_REMIGRATE|JOB_RESUME); 1466 #endif 1467 } else { 1468 /* 1469 * Job cannot be restarted. Mark the table as full and 1470 * place the job back on the list of stopped jobs. 1471 */ 1472 if ( 1473 #ifdef REMOTE 1474 verboseRemigrates || 1475 #endif 1476 DEBUG(JOB)) { 1477 (void) fprintf(stdout, "*** holding\n"); 1478 (void) fflush(stdout); 1479 } 1480 (void)Lst_AtFront(stoppedJobs, (ClientData)job); 1481 jobFull = TRUE; 1482 if (DEBUG(JOB)) { 1483 (void) fprintf(stdout, "Job queue is full.\n"); 1484 (void) fflush(stdout); 1485 } 1486 return; 1487 } 1488 #ifdef REMOTE 1489 } else { 1490 /* 1491 * Clear out the remigrate and resume flags. Set the continuing 1492 * flag so we know later on that the process isn't exiting just 1493 * because of a signal. 1494 */ 1495 job->flags &= ~(JOB_REMIGRATE|JOB_RESUME); 1496 job->flags |= JOB_CONTINUING; 1497 job->rmtID = host; 1498 } 1499 #endif 1500 1501 (void)Lst_AtEnd(jobs, (ClientData)job); 1502 nJobs += 1; 1503 if (nJobs == maxJobs) { 1504 jobFull = TRUE; 1505 if (DEBUG(JOB)) { 1506 (void) fprintf(stdout, "Job queue is full.\n"); 1507 (void) fflush(stdout); 1508 } 1509 } 1510 } else if (job->flags & JOB_RESTART) { 1511 /* 1512 * Set up the control arguments to the shell. This is based on the 1513 * flags set earlier for this job. If the JOB_IGNERR flag is clear, 1514 * the 'exit' flag of the commandShell is used to cause it to exit 1515 * upon receiving an error. If the JOB_SILENT flag is clear, the 1516 * 'echo' flag of the commandShell is used to get it to start echoing 1517 * as soon as it starts processing commands. 1518 */ 1519 char *argv[10]; 1520 1521 JobMakeArgv(job, argv); 1522 1523 if (DEBUG(JOB)) { 1524 (void) fprintf(stdout, "Restarting %s...", job->node->name); 1525 (void) fflush(stdout); 1526 } 1527 #ifdef REMOTE 1528 if ((job->node->type&OP_NOEXPORT) || 1529 (nLocal < maxLocal && runLocalFirst) 1530 # ifdef RMT_NO_EXEC 1531 || !Rmt_Export(shellPath, argv, job) 1532 # else 1533 || !Rmt_Begin(shellPath, argv, job->node) 1534 # endif 1535 #endif 1536 { 1537 if (((nLocal >= maxLocal) && !(job->flags & JOB_SPECIAL))) { 1538 /* 1539 * Can't be exported and not allowed to run locally -- put it 1540 * back on the hold queue and mark the table full 1541 */ 1542 if (DEBUG(JOB)) { 1543 (void) fprintf(stdout, "holding\n"); 1544 (void) fflush(stdout); 1545 } 1546 (void)Lst_AtFront(stoppedJobs, (ClientData)job); 1547 jobFull = TRUE; 1548 if (DEBUG(JOB)) { 1549 (void) fprintf(stdout, "Job queue is full.\n"); 1550 (void) fflush(stdout); 1551 } 1552 return; 1553 } else { 1554 /* 1555 * Job may be run locally. 1556 */ 1557 if (DEBUG(JOB)) { 1558 (void) fprintf(stdout, "running locally\n"); 1559 (void) fflush(stdout); 1560 } 1561 job->flags &= ~JOB_REMOTE; 1562 } 1563 } 1564 #ifdef REMOTE 1565 else { 1566 /* 1567 * Can be exported. Hooray! 1568 */ 1569 if (DEBUG(JOB)) { 1570 (void) fprintf(stdout, "exporting\n"); 1571 (void) fflush(stdout); 1572 } 1573 job->flags |= JOB_REMOTE; 1574 } 1575 #endif 1576 JobExec(job, argv); 1577 } else { 1578 /* 1579 * The job has stopped and needs to be restarted. Why it stopped, 1580 * we don't know... 1581 */ 1582 if (DEBUG(JOB)) { 1583 (void) fprintf(stdout, "Resuming %s...", job->node->name); 1584 (void) fflush(stdout); 1585 } 1586 if (((job->flags & JOB_REMOTE) || 1587 (nLocal < maxLocal) || 1588 #ifdef REMOTE 1589 (((job->flags & JOB_SPECIAL) && 1590 (job->node->type & OP_NOEXPORT)) && 1591 (maxLocal == 0))) && 1592 #else 1593 ((job->flags & JOB_SPECIAL) && 1594 (maxLocal == 0))) && 1595 #endif 1596 (nJobs != maxJobs)) 1597 { 1598 /* 1599 * If the job is remote, it's ok to resume it as long as the 1600 * maximum concurrency won't be exceeded. If it's local and 1601 * we haven't reached the local concurrency limit already (or the 1602 * job must be run locally and maxLocal is 0), it's also ok to 1603 * resume it. 1604 */ 1605 Boolean error; 1606 int status; 1607 1608 #ifdef RMT_WANTS_SIGNALS 1609 if (job->flags & JOB_REMOTE) { 1610 error = !Rmt_Signal(job, SIGCONT); 1611 } else 1612 #endif /* RMT_WANTS_SIGNALS */ 1613 error = (KILL(job->pid, SIGCONT) != 0); 1614 1615 if (!error) { 1616 /* 1617 * Make sure the user knows we've continued the beast and 1618 * actually put the thing in the job table. 1619 */ 1620 job->flags |= JOB_CONTINUING; 1621 status = W_STOPCODE(SIGCONT); 1622 JobFinish(job, &status); 1623 1624 job->flags &= ~(JOB_RESUME|JOB_CONTINUING); 1625 if (DEBUG(JOB)) { 1626 (void) fprintf(stdout, "done\n"); 1627 (void) fflush(stdout); 1628 } 1629 } else { 1630 Error("couldn't resume %s: %s", 1631 job->node->name, strerror(errno)); 1632 status = W_EXITCODE(1, 0); 1633 JobFinish(job, &status); 1634 } 1635 } else { 1636 /* 1637 * Job cannot be restarted. Mark the table as full and 1638 * place the job back on the list of stopped jobs. 1639 */ 1640 if (DEBUG(JOB)) { 1641 (void) fprintf(stdout, "table full\n"); 1642 (void) fflush(stdout); 1643 } 1644 (void) Lst_AtFront(stoppedJobs, (ClientData)job); 1645 jobFull = TRUE; 1646 if (DEBUG(JOB)) { 1647 (void) fprintf(stdout, "Job queue is full.\n"); 1648 (void) fflush(stdout); 1649 } 1650 } 1651 } 1652 } 1653 1654 /*- 1655 *----------------------------------------------------------------------- 1656 * JobStart -- 1657 * Start a target-creation process going for the target described 1658 * by the graph node gn. 1659 * 1660 * Results: 1661 * JOB_ERROR if there was an error in the commands, JOB_FINISHED 1662 * if there isn't actually anything left to do for the job and 1663 * JOB_RUNNING if the job has been started. 1664 * 1665 * Side Effects: 1666 * A new Job node is created and added to the list of running 1667 * jobs. PMake is forked and a child shell created. 1668 *----------------------------------------------------------------------- 1669 */ 1670 static int 1671 JobStart(gn, flags, previous) 1672 GNode *gn; /* target to create */ 1673 int flags; /* flags for the job to override normal ones. 1674 * e.g. JOB_SPECIAL or JOB_IGNDOTS */ 1675 Job *previous; /* The previous Job structure for this node, 1676 * if any. */ 1677 { 1678 register Job *job; /* new job descriptor */ 1679 char *argv[10]; /* Argument vector to shell */ 1680 Boolean cmdsOK; /* true if the nodes commands were all right */ 1681 Boolean local; /* Set true if the job was run locally */ 1682 Boolean noExec; /* Set true if we decide not to run the job */ 1683 int tfd; /* File descriptor to the temp file */ 1684 1685 if (previous != NULL) { 1686 previous->flags &= ~(JOB_FIRST|JOB_IGNERR|JOB_SILENT|JOB_REMOTE); 1687 job = previous; 1688 } else { 1689 job = (Job *) emalloc(sizeof(Job)); 1690 if (job == NULL) { 1691 Punt("JobStart out of memory"); 1692 } 1693 flags |= JOB_FIRST; 1694 } 1695 1696 job->node = gn; 1697 job->tailCmds = NILLNODE; 1698 1699 /* 1700 * Set the initial value of the flags for this job based on the global 1701 * ones and the node's attributes... Any flags supplied by the caller 1702 * are also added to the field. 1703 */ 1704 job->flags = 0; 1705 if (Targ_Ignore(gn)) { 1706 job->flags |= JOB_IGNERR; 1707 } 1708 if (Targ_Silent(gn)) { 1709 job->flags |= JOB_SILENT; 1710 } 1711 job->flags |= flags; 1712 1713 /* 1714 * Check the commands now so any attributes from .DEFAULT have a chance 1715 * to migrate to the node 1716 */ 1717 if (!compatMake && job->flags & JOB_FIRST) { 1718 cmdsOK = Job_CheckCommands(gn, Error); 1719 } else { 1720 cmdsOK = TRUE; 1721 } 1722 1723 /* 1724 * If the -n flag wasn't given, we open up OUR (not the child's) 1725 * temporary file to stuff commands in it. The thing is rd/wr so we don't 1726 * need to reopen it to feed it to the shell. If the -n flag *was* given, 1727 * we just set the file to be stdout. Cute, huh? 1728 */ 1729 if ((gn->type & OP_MAKE) || (!noExecute && !touchFlag)) { 1730 /* 1731 * We're serious here, but if the commands were bogus, we're 1732 * also dead... 1733 */ 1734 if (!cmdsOK) { 1735 DieHorribly(); 1736 } 1737 1738 if ((tfd = mkstemp(tfile)) == -1) 1739 Punt("Could not create temporary file %s", strerror(errno)); 1740 (void) eunlink(tfile); 1741 1742 job->cmdFILE = fdopen(tfd, "w+"); 1743 if (job->cmdFILE == NULL) { 1744 Punt("Could not fdopen %s", tfile); 1745 } 1746 (void) fcntl(FILENO(job->cmdFILE), F_SETFD, 1); 1747 /* 1748 * Send the commands to the command file, flush all its buffers then 1749 * rewind and remove the thing. 1750 */ 1751 noExec = FALSE; 1752 1753 /* 1754 * used to be backwards; replace when start doing multiple commands 1755 * per shell. 1756 */ 1757 if (compatMake) { 1758 /* 1759 * Be compatible: If this is the first time for this node, 1760 * verify its commands are ok and open the commands list for 1761 * sequential access by later invocations of JobStart. 1762 * Once that is done, we take the next command off the list 1763 * and print it to the command file. If the command was an 1764 * ellipsis, note that there's nothing more to execute. 1765 */ 1766 if ((job->flags&JOB_FIRST) && (Lst_Open(gn->commands) != SUCCESS)){ 1767 cmdsOK = FALSE; 1768 } else { 1769 LstNode ln = Lst_Next(gn->commands); 1770 1771 if ((ln == NILLNODE) || 1772 JobPrintCommand((ClientData) Lst_Datum(ln), 1773 (ClientData) job)) 1774 { 1775 noExec = TRUE; 1776 Lst_Close(gn->commands); 1777 } 1778 if (noExec && !(job->flags & JOB_FIRST)) { 1779 /* 1780 * If we're not going to execute anything, the job 1781 * is done and we need to close down the various 1782 * file descriptors we've opened for output, then 1783 * call JobDoOutput to catch the final characters or 1784 * send the file to the screen... Note that the i/o streams 1785 * are only open if this isn't the first job. 1786 * Note also that this could not be done in 1787 * Job_CatchChildren b/c it wasn't clear if there were 1788 * more commands to execute or not... 1789 */ 1790 JobClose(job); 1791 } 1792 } 1793 } else { 1794 /* 1795 * We can do all the commands at once. hooray for sanity 1796 */ 1797 numCommands = 0; 1798 Lst_ForEach(gn->commands, JobPrintCommand, (ClientData)job); 1799 1800 /* 1801 * If we didn't print out any commands to the shell script, 1802 * there's not much point in executing the shell, is there? 1803 */ 1804 if (numCommands == 0) { 1805 noExec = TRUE; 1806 } 1807 } 1808 } else if (noExecute) { 1809 /* 1810 * Not executing anything -- just print all the commands to stdout 1811 * in one fell swoop. This will still set up job->tailCmds correctly. 1812 */ 1813 if (lastNode != gn) { 1814 MESSAGE(stdout, gn); 1815 lastNode = gn; 1816 } 1817 job->cmdFILE = stdout; 1818 /* 1819 * Only print the commands if they're ok, but don't die if they're 1820 * not -- just let the user know they're bad and keep going. It 1821 * doesn't do any harm in this case and may do some good. 1822 */ 1823 if (cmdsOK) { 1824 Lst_ForEach(gn->commands, JobPrintCommand, (ClientData)job); 1825 } 1826 /* 1827 * Don't execute the shell, thank you. 1828 */ 1829 noExec = TRUE; 1830 } else { 1831 /* 1832 * Just touch the target and note that no shell should be executed. 1833 * Set cmdFILE to stdout to make life easier. Check the commands, too, 1834 * but don't die if they're no good -- it does no harm to keep working 1835 * up the graph. 1836 */ 1837 job->cmdFILE = stdout; 1838 Job_Touch(gn, job->flags&JOB_SILENT); 1839 noExec = TRUE; 1840 } 1841 1842 /* 1843 * If we're not supposed to execute a shell, don't. 1844 */ 1845 if (noExec) { 1846 /* 1847 * Unlink and close the command file if we opened one 1848 */ 1849 if (job->cmdFILE != stdout) { 1850 if (job->cmdFILE != NULL) 1851 (void) fclose(job->cmdFILE); 1852 } else { 1853 (void) fflush(stdout); 1854 } 1855 1856 /* 1857 * We only want to work our way up the graph if we aren't here because 1858 * the commands for the job were no good. 1859 */ 1860 if (cmdsOK) { 1861 if (aborting == 0) { 1862 if (job->tailCmds != NILLNODE) { 1863 Lst_ForEachFrom(job->node->commands, job->tailCmds, 1864 JobSaveCommand, 1865 (ClientData)job->node); 1866 } 1867 Make_Update(job->node); 1868 } 1869 free((Address)job); 1870 return(JOB_FINISHED); 1871 } else { 1872 free((Address)job); 1873 return(JOB_ERROR); 1874 } 1875 } else { 1876 (void) fflush(job->cmdFILE); 1877 } 1878 1879 /* 1880 * Set up the control arguments to the shell. This is based on the flags 1881 * set earlier for this job. 1882 */ 1883 JobMakeArgv(job, argv); 1884 1885 /* 1886 * If we're using pipes to catch output, create the pipe by which we'll 1887 * get the shell's output. If we're using files, print out that we're 1888 * starting a job and then set up its temporary-file name. 1889 */ 1890 if (!compatMake || (job->flags & JOB_FIRST)) { 1891 if (usePipes) { 1892 int fd[2]; 1893 if (pipe(fd) == -1) 1894 Punt("Cannot create pipe: %s", strerror(errno)); 1895 job->inPipe = fd[0]; 1896 job->outPipe = fd[1]; 1897 (void) fcntl(job->inPipe, F_SETFD, 1); 1898 (void) fcntl(job->outPipe, F_SETFD, 1); 1899 } else { 1900 (void) fprintf(stdout, "Remaking `%s'\n", gn->name); 1901 (void) fflush(stdout); 1902 (void) strcpy(job->outFile, TMPPAT); 1903 job->outFd = mkstemp(job->outFile); 1904 (void) fcntl(job->outFd, F_SETFD, 1); 1905 } 1906 } 1907 1908 #ifdef REMOTE 1909 if (!(gn->type & OP_NOEXPORT) && !(runLocalFirst && nLocal < maxLocal)) { 1910 #ifdef RMT_NO_EXEC 1911 local = !Rmt_Export(shellPath, argv, job); 1912 #else 1913 local = !Rmt_Begin(shellPath, argv, job->node); 1914 #endif /* RMT_NO_EXEC */ 1915 if (!local) { 1916 job->flags |= JOB_REMOTE; 1917 } 1918 } else 1919 #endif 1920 local = TRUE; 1921 1922 if (local && (((nLocal >= maxLocal) && 1923 !(job->flags & JOB_SPECIAL) && 1924 #ifdef REMOTE 1925 (!(gn->type & OP_NOEXPORT) || (maxLocal != 0)) 1926 #else 1927 (maxLocal != 0) 1928 #endif 1929 ))) 1930 { 1931 /* 1932 * The job can only be run locally, but we've hit the limit of 1933 * local concurrency, so put the job on hold until some other job 1934 * finishes. Note that the special jobs (.BEGIN, .INTERRUPT and .END) 1935 * may be run locally even when the local limit has been reached 1936 * (e.g. when maxLocal == 0), though they will be exported if at 1937 * all possible. In addition, any target marked with .NOEXPORT will 1938 * be run locally if maxLocal is 0. 1939 */ 1940 jobFull = TRUE; 1941 1942 if (DEBUG(JOB)) { 1943 (void) fprintf(stdout, "Can only run job locally.\n"); 1944 (void) fflush(stdout); 1945 } 1946 job->flags |= JOB_RESTART; 1947 (void) Lst_AtEnd(stoppedJobs, (ClientData)job); 1948 } else { 1949 if ((nLocal >= maxLocal) && local) { 1950 /* 1951 * If we're running this job locally as a special case (see above), 1952 * at least say the table is full. 1953 */ 1954 jobFull = TRUE; 1955 if (DEBUG(JOB)) { 1956 (void) fprintf(stdout, "Local job queue is full.\n"); 1957 (void) fflush(stdout); 1958 } 1959 } 1960 JobExec(job, argv); 1961 } 1962 return(JOB_RUNNING); 1963 } 1964 1965 static char * 1966 JobOutput(job, cp, endp, msg) 1967 register Job *job; 1968 register char *cp, *endp; 1969 int msg; 1970 { 1971 register char *ecp; 1972 1973 if (commandShell->noPrint) { 1974 ecp = Str_FindSubstring(cp, commandShell->noPrint); 1975 while (ecp != NULL) { 1976 if (cp != ecp) { 1977 *ecp = '\0'; 1978 if (msg && job->node != lastNode) { 1979 MESSAGE(stdout, job->node); 1980 lastNode = job->node; 1981 } 1982 /* 1983 * The only way there wouldn't be a newline after 1984 * this line is if it were the last in the buffer. 1985 * however, since the non-printable comes after it, 1986 * there must be a newline, so we don't print one. 1987 */ 1988 (void) fprintf(stdout, "%s", cp); 1989 (void) fflush(stdout); 1990 } 1991 cp = ecp + commandShell->noPLen; 1992 if (cp != endp) { 1993 /* 1994 * Still more to print, look again after skipping 1995 * the whitespace following the non-printable 1996 * command.... 1997 */ 1998 cp++; 1999 while (*cp == ' ' || *cp == '\t' || *cp == '\n') { 2000 cp++; 2001 } 2002 ecp = Str_FindSubstring(cp, commandShell->noPrint); 2003 } else { 2004 return cp; 2005 } 2006 } 2007 } 2008 return cp; 2009 } 2010 2011 /*- 2012 *----------------------------------------------------------------------- 2013 * JobDoOutput -- 2014 * This function is called at different times depending on 2015 * whether the user has specified that output is to be collected 2016 * via pipes or temporary files. In the former case, we are called 2017 * whenever there is something to read on the pipe. We collect more 2018 * output from the given job and store it in the job's outBuf. If 2019 * this makes up a line, we print it tagged by the job's identifier, 2020 * as necessary. 2021 * If output has been collected in a temporary file, we open the 2022 * file and read it line by line, transfering it to our own 2023 * output channel until the file is empty. At which point we 2024 * remove the temporary file. 2025 * In both cases, however, we keep our figurative eye out for the 2026 * 'noPrint' line for the shell from which the output came. If 2027 * we recognize a line, we don't print it. If the command is not 2028 * alone on the line (the character after it is not \0 or \n), we 2029 * do print whatever follows it. 2030 * 2031 * Results: 2032 * None 2033 * 2034 * Side Effects: 2035 * curPos may be shifted as may the contents of outBuf. 2036 *----------------------------------------------------------------------- 2037 */ 2038 STATIC void 2039 JobDoOutput(job, finish) 2040 register Job *job; /* the job whose output needs printing */ 2041 Boolean finish; /* TRUE if this is the last time we'll be 2042 * called for this job */ 2043 { 2044 Boolean gotNL = FALSE; /* true if got a newline */ 2045 Boolean fbuf; /* true if our buffer filled up */ 2046 register int nr; /* number of bytes read */ 2047 register int i; /* auxiliary index into outBuf */ 2048 register int max; /* limit for i (end of current data) */ 2049 int nRead; /* (Temporary) number of bytes read */ 2050 2051 FILE *oFILE; /* Stream pointer to shell's output file */ 2052 char inLine[132]; 2053 2054 2055 if (usePipes) { 2056 /* 2057 * Read as many bytes as will fit in the buffer. 2058 */ 2059 end_loop: 2060 gotNL = FALSE; 2061 fbuf = FALSE; 2062 2063 nRead = read(job->inPipe, &job->outBuf[job->curPos], 2064 JOB_BUFSIZE - job->curPos); 2065 if (nRead < 0) { 2066 if (DEBUG(JOB)) { 2067 perror("JobDoOutput(piperead)"); 2068 } 2069 nr = 0; 2070 } else { 2071 nr = nRead; 2072 } 2073 2074 /* 2075 * If we hit the end-of-file (the job is dead), we must flush its 2076 * remaining output, so pretend we read a newline if there's any 2077 * output remaining in the buffer. 2078 * Also clear the 'finish' flag so we stop looping. 2079 */ 2080 if ((nr == 0) && (job->curPos != 0)) { 2081 job->outBuf[job->curPos] = '\n'; 2082 nr = 1; 2083 finish = FALSE; 2084 } else if (nr == 0) { 2085 finish = FALSE; 2086 } 2087 2088 /* 2089 * Look for the last newline in the bytes we just got. If there is 2090 * one, break out of the loop with 'i' as its index and gotNL set 2091 * TRUE. 2092 */ 2093 max = job->curPos + nr; 2094 for (i = job->curPos + nr - 1; i >= job->curPos; i--) { 2095 if (job->outBuf[i] == '\n') { 2096 gotNL = TRUE; 2097 break; 2098 } else if (job->outBuf[i] == '\0') { 2099 /* 2100 * Why? 2101 */ 2102 job->outBuf[i] = ' '; 2103 } 2104 } 2105 2106 if (!gotNL) { 2107 job->curPos += nr; 2108 if (job->curPos == JOB_BUFSIZE) { 2109 /* 2110 * If we've run out of buffer space, we have no choice 2111 * but to print the stuff. sigh. 2112 */ 2113 fbuf = TRUE; 2114 i = job->curPos; 2115 } 2116 } 2117 if (gotNL || fbuf) { 2118 /* 2119 * Need to send the output to the screen. Null terminate it 2120 * first, overwriting the newline character if there was one. 2121 * So long as the line isn't one we should filter (according 2122 * to the shell description), we print the line, preceeded 2123 * by a target banner if this target isn't the same as the 2124 * one for which we last printed something. 2125 * The rest of the data in the buffer are then shifted down 2126 * to the start of the buffer and curPos is set accordingly. 2127 */ 2128 job->outBuf[i] = '\0'; 2129 if (i >= job->curPos) { 2130 char *cp; 2131 2132 cp = JobOutput(job, job->outBuf, &job->outBuf[i], FALSE); 2133 2134 /* 2135 * There's still more in that thar buffer. This time, though, 2136 * we know there's no newline at the end, so we add one of 2137 * our own free will. 2138 */ 2139 if (*cp != '\0') { 2140 if (job->node != lastNode) { 2141 MESSAGE(stdout, job->node); 2142 lastNode = job->node; 2143 } 2144 (void) fprintf(stdout, "%s%s", cp, gotNL ? "\n" : ""); 2145 (void) fflush(stdout); 2146 } 2147 } 2148 if (i < max - 1) { 2149 /* shift the remaining characters down */ 2150 (void) memcpy(job->outBuf, &job->outBuf[i + 1], max - (i + 1)); 2151 job->curPos = max - (i + 1); 2152 2153 } else { 2154 /* 2155 * We have written everything out, so we just start over 2156 * from the start of the buffer. No copying. No nothing. 2157 */ 2158 job->curPos = 0; 2159 } 2160 } 2161 if (finish) { 2162 /* 2163 * If the finish flag is true, we must loop until we hit 2164 * end-of-file on the pipe. This is guaranteed to happen 2165 * eventually since the other end of the pipe is now closed 2166 * (we closed it explicitly and the child has exited). When 2167 * we do get an EOF, finish will be set FALSE and we'll fall 2168 * through and out. 2169 */ 2170 goto end_loop; 2171 } 2172 } else { 2173 /* 2174 * We've been called to retrieve the output of the job from the 2175 * temporary file where it's been squirreled away. This consists of 2176 * opening the file, reading the output line by line, being sure not 2177 * to print the noPrint line for the shell we used, then close and 2178 * remove the temporary file. Very simple. 2179 * 2180 * Change to read in blocks and do FindSubString type things as for 2181 * pipes? That would allow for "@echo -n..." 2182 */ 2183 oFILE = fopen(job->outFile, "r"); 2184 if (oFILE != NULL) { 2185 (void) fprintf(stdout, "Results of making %s:\n", job->node->name); 2186 (void) fflush(stdout); 2187 while (fgets(inLine, sizeof(inLine), oFILE) != NULL) { 2188 register char *cp, *endp, *oendp; 2189 2190 cp = inLine; 2191 oendp = endp = inLine + strlen(inLine); 2192 if (endp[-1] == '\n') { 2193 *--endp = '\0'; 2194 } 2195 cp = JobOutput(job, inLine, endp, FALSE); 2196 2197 /* 2198 * There's still more in that thar buffer. This time, though, 2199 * we know there's no newline at the end, so we add one of 2200 * our own free will. 2201 */ 2202 (void) fprintf(stdout, "%s", cp); 2203 (void) fflush(stdout); 2204 if (endp != oendp) { 2205 (void) fprintf(stdout, "\n"); 2206 (void) fflush(stdout); 2207 } 2208 } 2209 (void) fclose(oFILE); 2210 (void) eunlink(job->outFile); 2211 } 2212 } 2213 } 2214 2215 /*- 2216 *----------------------------------------------------------------------- 2217 * Job_CatchChildren -- 2218 * Handle the exit of a child. Called from Make_Make. 2219 * 2220 * Results: 2221 * none. 2222 * 2223 * Side Effects: 2224 * The job descriptor is removed from the list of children. 2225 * 2226 * Notes: 2227 * We do waits, blocking or not, according to the wisdom of our 2228 * caller, until there are no more children to report. For each 2229 * job, call JobFinish to finish things off. This will take care of 2230 * putting jobs on the stoppedJobs queue. 2231 * 2232 *----------------------------------------------------------------------- 2233 */ 2234 void 2235 Job_CatchChildren(block) 2236 Boolean block; /* TRUE if should block on the wait. */ 2237 { 2238 int pid; /* pid of dead child */ 2239 register Job *job; /* job descriptor for dead child */ 2240 LstNode jnode; /* list element for finding job */ 2241 int status; /* Exit/termination status */ 2242 2243 /* 2244 * Don't even bother if we know there's no one around. 2245 */ 2246 if (nLocal == 0) { 2247 return; 2248 } 2249 2250 while ((pid = waitpid((pid_t) -1, &status, 2251 (block?0:WNOHANG)|WUNTRACED)) > 0) 2252 { 2253 if (DEBUG(JOB)) { 2254 (void) fprintf(stdout, "Process %d exited or stopped %x.\n", pid, 2255 status); 2256 (void) fflush(stdout); 2257 } 2258 2259 2260 jnode = Lst_Find(jobs, (ClientData)&pid, JobCmpPid); 2261 2262 if (jnode == NILLNODE) { 2263 if (WIFSTOPPED(status) && (WSTOPSIG(status) == SIGCONT)) { 2264 jnode = Lst_Find(stoppedJobs, (ClientData) &pid, JobCmpPid); 2265 if (jnode == NILLNODE) { 2266 Error("Resumed child (%d) not in table", pid); 2267 continue; 2268 } 2269 job = (Job *)Lst_Datum(jnode); 2270 (void) Lst_Remove(stoppedJobs, jnode); 2271 } else { 2272 Error("Child (%d) not in table?", pid); 2273 continue; 2274 } 2275 } else { 2276 job = (Job *) Lst_Datum(jnode); 2277 (void) Lst_Remove(jobs, jnode); 2278 nJobs -= 1; 2279 if (jobFull && DEBUG(JOB)) { 2280 (void) fprintf(stdout, "Job queue is no longer full.\n"); 2281 (void) fflush(stdout); 2282 } 2283 jobFull = FALSE; 2284 #ifdef REMOTE 2285 if (!(job->flags & JOB_REMOTE)) { 2286 if (DEBUG(JOB)) { 2287 (void) fprintf(stdout, 2288 "Job queue has one fewer local process.\n"); 2289 (void) fflush(stdout); 2290 } 2291 nLocal -= 1; 2292 } 2293 #else 2294 nLocal -= 1; 2295 #endif 2296 } 2297 2298 JobFinish(job, &status); 2299 } 2300 } 2301 2302 /*- 2303 *----------------------------------------------------------------------- 2304 * Job_CatchOutput -- 2305 * Catch the output from our children, if we're using 2306 * pipes do so. Otherwise just block time until we get a 2307 * signal (most likely a SIGCHLD) since there's no point in 2308 * just spinning when there's nothing to do and the reaping 2309 * of a child can wait for a while. 2310 * 2311 * Results: 2312 * None 2313 * 2314 * Side Effects: 2315 * Output is read from pipes if we're piping. 2316 * ----------------------------------------------------------------------- 2317 */ 2318 void 2319 Job_CatchOutput() 2320 { 2321 int nfds; 2322 struct timeval timeout; 2323 fd_set readfds; 2324 register LstNode ln; 2325 register Job *job; 2326 #ifdef RMT_WILL_WATCH 2327 int pnJobs; /* Previous nJobs */ 2328 #endif 2329 2330 (void) fflush(stdout); 2331 #ifdef RMT_WILL_WATCH 2332 pnJobs = nJobs; 2333 2334 /* 2335 * It is possible for us to be called with nJobs equal to 0. This happens 2336 * if all the jobs finish and a job that is stopped cannot be run 2337 * locally (eg if maxLocal is 0) and cannot be exported. The job will 2338 * be placed back on the stoppedJobs queue, Job_Empty() will return false, 2339 * Make_Run will call us again when there's nothing for which to wait. 2340 * nJobs never changes, so we loop forever. Hence the check. It could 2341 * be argued that we should sleep for a bit so as not to swamp the 2342 * exportation system with requests. Perhaps we should. 2343 * 2344 * NOTE: IT IS THE RESPONSIBILITY OF Rmt_Wait TO CALL Job_CatchChildren 2345 * IN A TIMELY FASHION TO CATCH ANY LOCALLY RUNNING JOBS THAT EXIT. 2346 * It may use the variable nLocal to determine if it needs to call 2347 * Job_CatchChildren (if nLocal is 0, there's nothing for which to 2348 * wait...) 2349 */ 2350 while (nJobs != 0 && pnJobs == nJobs) { 2351 Rmt_Wait(); 2352 } 2353 #else 2354 if (usePipes) { 2355 readfds = outputs; 2356 timeout.tv_sec = SEL_SEC; 2357 timeout.tv_usec = SEL_USEC; 2358 2359 if ((nfds = select(FD_SETSIZE, &readfds, (fd_set *) 0, 2360 (fd_set *) 0, &timeout)) <= 0) 2361 return; 2362 else { 2363 if (Lst_Open(jobs) == FAILURE) { 2364 Punt("Cannot open job table"); 2365 } 2366 while (nfds && (ln = Lst_Next(jobs)) != NILLNODE) { 2367 job = (Job *) Lst_Datum(ln); 2368 if (FD_ISSET(job->inPipe, &readfds)) { 2369 JobDoOutput(job, FALSE); 2370 nfds -= 1; 2371 } 2372 } 2373 Lst_Close(jobs); 2374 } 2375 } 2376 #endif /* RMT_WILL_WATCH */ 2377 } 2378 2379 /*- 2380 *----------------------------------------------------------------------- 2381 * Job_Make -- 2382 * Start the creation of a target. Basically a front-end for 2383 * JobStart used by the Make module. 2384 * 2385 * Results: 2386 * None. 2387 * 2388 * Side Effects: 2389 * Another job is started. 2390 * 2391 *----------------------------------------------------------------------- 2392 */ 2393 void 2394 Job_Make(gn) 2395 GNode *gn; 2396 { 2397 (void) JobStart(gn, 0, NULL); 2398 } 2399 2400 /*- 2401 *----------------------------------------------------------------------- 2402 * Job_Init -- 2403 * Initialize the process module 2404 * 2405 * Results: 2406 * none 2407 * 2408 * Side Effects: 2409 * lists and counters are initialized 2410 *----------------------------------------------------------------------- 2411 */ 2412 void 2413 Job_Init(maxproc, maxlocal) 2414 int maxproc; /* the greatest number of jobs which may be 2415 * running at one time */ 2416 int maxlocal; /* the greatest number of local jobs which may 2417 * be running at once. */ 2418 { 2419 GNode *begin; /* node for commands to do at the very start */ 2420 2421 jobs = Lst_Init(FALSE); 2422 stoppedJobs = Lst_Init(FALSE); 2423 maxJobs = maxproc; 2424 maxLocal = maxlocal; 2425 nJobs = 0; 2426 nLocal = 0; 2427 jobFull = FALSE; 2428 2429 aborting = 0; 2430 errors = 0; 2431 2432 lastNode = NILGNODE; 2433 2434 if (maxJobs == 1 2435 #ifdef REMOTE 2436 || noMessages 2437 #endif 2438 ) { 2439 /* 2440 * If only one job can run at a time, there's no need for a banner, 2441 * no is there? 2442 */ 2443 targFmt = ""; 2444 } else { 2445 targFmt = TARG_FMT; 2446 } 2447 2448 if (shellPath == NULL) { 2449 /* 2450 * The user didn't specify a shell to use, so we are using the 2451 * default one... Both the absolute path and the last component 2452 * must be set. The last component is taken from the 'name' field 2453 * of the default shell description pointed-to by commandShell. 2454 * All default shells are located in _PATH_DEFSHELLDIR. 2455 */ 2456 shellName = commandShell->name; 2457 shellPath = str_concat(_PATH_DEFSHELLDIR, shellName, STR_ADDSLASH); 2458 } 2459 2460 if (commandShell->exit == NULL) { 2461 commandShell->exit = ""; 2462 } 2463 if (commandShell->echo == NULL) { 2464 commandShell->echo = ""; 2465 } 2466 2467 /* 2468 * Catch the four signals that POSIX specifies if they aren't ignored. 2469 * JobPassSig will take care of calling JobInterrupt if appropriate. 2470 */ 2471 if (signal(SIGINT, SIG_IGN) != SIG_IGN) { 2472 (void) signal(SIGINT, JobPassSig); 2473 } 2474 if (signal(SIGHUP, SIG_IGN) != SIG_IGN) { 2475 (void) signal(SIGHUP, JobPassSig); 2476 } 2477 if (signal(SIGQUIT, SIG_IGN) != SIG_IGN) { 2478 (void) signal(SIGQUIT, JobPassSig); 2479 } 2480 if (signal(SIGTERM, SIG_IGN) != SIG_IGN) { 2481 (void) signal(SIGTERM, JobPassSig); 2482 } 2483 /* 2484 * There are additional signals that need to be caught and passed if 2485 * either the export system wants to be told directly of signals or if 2486 * we're giving each job its own process group (since then it won't get 2487 * signals from the terminal driver as we own the terminal) 2488 */ 2489 #if defined(RMT_WANTS_SIGNALS) || defined(USE_PGRP) 2490 if (signal(SIGTSTP, SIG_IGN) != SIG_IGN) { 2491 (void) signal(SIGTSTP, JobPassSig); 2492 } 2493 if (signal(SIGTTOU, SIG_IGN) != SIG_IGN) { 2494 (void) signal(SIGTTOU, JobPassSig); 2495 } 2496 if (signal(SIGTTIN, SIG_IGN) != SIG_IGN) { 2497 (void) signal(SIGTTIN, JobPassSig); 2498 } 2499 if (signal(SIGWINCH, SIG_IGN) != SIG_IGN) { 2500 (void) signal(SIGWINCH, JobPassSig); 2501 } 2502 #endif 2503 2504 begin = Targ_FindNode(".BEGIN", TARG_NOCREATE); 2505 2506 if (begin != NILGNODE) { 2507 JobStart(begin, JOB_SPECIAL, (Job *)0); 2508 while (nJobs) { 2509 Job_CatchOutput(); 2510 #ifndef RMT_WILL_WATCH 2511 Job_CatchChildren(!usePipes); 2512 #endif /* RMT_WILL_WATCH */ 2513 } 2514 } 2515 postCommands = Targ_FindNode(".END", TARG_CREATE); 2516 } 2517 2518 /*- 2519 *----------------------------------------------------------------------- 2520 * Job_Full -- 2521 * See if the job table is full. It is considered full if it is OR 2522 * if we are in the process of aborting OR if we have 2523 * reached/exceeded our local quota. This prevents any more jobs 2524 * from starting up. 2525 * 2526 * Results: 2527 * TRUE if the job table is full, FALSE otherwise 2528 * Side Effects: 2529 * None. 2530 *----------------------------------------------------------------------- 2531 */ 2532 Boolean 2533 Job_Full() 2534 { 2535 return(aborting || jobFull); 2536 } 2537 2538 /*- 2539 *----------------------------------------------------------------------- 2540 * Job_Empty -- 2541 * See if the job table is empty. Because the local concurrency may 2542 * be set to 0, it is possible for the job table to become empty, 2543 * while the list of stoppedJobs remains non-empty. In such a case, 2544 * we want to restart as many jobs as we can. 2545 * 2546 * Results: 2547 * TRUE if it is. FALSE if it ain't. 2548 * 2549 * Side Effects: 2550 * None. 2551 * 2552 * ----------------------------------------------------------------------- 2553 */ 2554 Boolean 2555 Job_Empty() 2556 { 2557 if (nJobs == 0) { 2558 if (!Lst_IsEmpty(stoppedJobs) && !aborting) { 2559 /* 2560 * The job table is obviously not full if it has no jobs in 2561 * it...Try and restart the stopped jobs. 2562 */ 2563 jobFull = FALSE; 2564 JobRestartJobs(); 2565 return(FALSE); 2566 } else { 2567 return(TRUE); 2568 } 2569 } else { 2570 return(FALSE); 2571 } 2572 } 2573 2574 /*- 2575 *----------------------------------------------------------------------- 2576 * JobMatchShell -- 2577 * Find a matching shell in 'shells' given its final component. 2578 * 2579 * Results: 2580 * A pointer to the Shell structure. 2581 * 2582 * Side Effects: 2583 * None. 2584 * 2585 *----------------------------------------------------------------------- 2586 */ 2587 static Shell * 2588 JobMatchShell(name) 2589 char *name; /* Final component of shell path */ 2590 { 2591 register Shell *sh; /* Pointer into shells table */ 2592 Shell *match; /* Longest-matching shell */ 2593 register char *cp1, 2594 *cp2; 2595 char *eoname; 2596 2597 eoname = name + strlen(name); 2598 2599 match = NULL; 2600 2601 for (sh = shells; sh->name != NULL; sh++) { 2602 for (cp1 = eoname - strlen(sh->name), cp2 = sh->name; 2603 *cp1 != '\0' && *cp1 == *cp2; 2604 cp1++, cp2++) { 2605 continue; 2606 } 2607 if (*cp1 != *cp2) { 2608 continue; 2609 } else if (match == NULL || strlen(match->name) < strlen(sh->name)) { 2610 match = sh; 2611 } 2612 } 2613 return(match == NULL ? sh : match); 2614 } 2615 2616 /*- 2617 *----------------------------------------------------------------------- 2618 * Job_ParseShell -- 2619 * Parse a shell specification and set up commandShell, shellPath 2620 * and shellName appropriately. 2621 * 2622 * Results: 2623 * FAILURE if the specification was incorrect. 2624 * 2625 * Side Effects: 2626 * commandShell points to a Shell structure (either predefined or 2627 * created from the shell spec), shellPath is the full path of the 2628 * shell described by commandShell, while shellName is just the 2629 * final component of shellPath. 2630 * 2631 * Notes: 2632 * A shell specification consists of a .SHELL target, with dependency 2633 * operator, followed by a series of blank-separated words. Double 2634 * quotes can be used to use blanks in words. A backslash escapes 2635 * anything (most notably a double-quote and a space) and 2636 * provides the functionality it does in C. Each word consists of 2637 * keyword and value separated by an equal sign. There should be no 2638 * unnecessary spaces in the word. The keywords are as follows: 2639 * name Name of shell. 2640 * path Location of shell. Overrides "name" if given 2641 * quiet Command to turn off echoing. 2642 * echo Command to turn echoing on 2643 * filter Result of turning off echoing that shouldn't be 2644 * printed. 2645 * echoFlag Flag to turn echoing on at the start 2646 * errFlag Flag to turn error checking on at the start 2647 * hasErrCtl True if shell has error checking control 2648 * check Command to turn on error checking if hasErrCtl 2649 * is TRUE or template of command to echo a command 2650 * for which error checking is off if hasErrCtl is 2651 * FALSE. 2652 * ignore Command to turn off error checking if hasErrCtl 2653 * is TRUE or template of command to execute a 2654 * command so as to ignore any errors it returns if 2655 * hasErrCtl is FALSE. 2656 * 2657 *----------------------------------------------------------------------- 2658 */ 2659 ReturnStatus 2660 Job_ParseShell(line) 2661 char *line; /* The shell spec */ 2662 { 2663 char **words; 2664 int wordCount; 2665 register char **argv; 2666 register int argc; 2667 char *path; 2668 Shell newShell; 2669 Boolean fullSpec = FALSE; 2670 2671 while (isspace((unsigned char)*line)) { 2672 line++; 2673 } 2674 2675 if (shellArgv) 2676 free(shellArgv); 2677 2678 words = brk_string(line, &wordCount, TRUE, &shellArgv); 2679 2680 memset((Address)&newShell, 0, sizeof(newShell)); 2681 2682 /* 2683 * Parse the specification by keyword 2684 */ 2685 for (path = NULL, argc = wordCount - 1, argv = words; 2686 argc != 0; 2687 argc--, argv++) { 2688 if (strncmp(*argv, "path=", 5) == 0) { 2689 path = &argv[0][5]; 2690 } else if (strncmp(*argv, "name=", 5) == 0) { 2691 newShell.name = &argv[0][5]; 2692 } else { 2693 if (strncmp(*argv, "quiet=", 6) == 0) { 2694 newShell.echoOff = &argv[0][6]; 2695 } else if (strncmp(*argv, "echo=", 5) == 0) { 2696 newShell.echoOn = &argv[0][5]; 2697 } else if (strncmp(*argv, "filter=", 7) == 0) { 2698 newShell.noPrint = &argv[0][7]; 2699 newShell.noPLen = strlen(newShell.noPrint); 2700 } else if (strncmp(*argv, "echoFlag=", 9) == 0) { 2701 newShell.echo = &argv[0][9]; 2702 } else if (strncmp(*argv, "errFlag=", 8) == 0) { 2703 newShell.exit = &argv[0][8]; 2704 } else if (strncmp(*argv, "hasErrCtl=", 10) == 0) { 2705 char c = argv[0][10]; 2706 newShell.hasErrCtl = !((c != 'Y') && (c != 'y') && 2707 (c != 'T') && (c != 't')); 2708 } else if (strncmp(*argv, "check=", 6) == 0) { 2709 newShell.errCheck = &argv[0][6]; 2710 } else if (strncmp(*argv, "ignore=", 7) == 0) { 2711 newShell.ignErr = &argv[0][7]; 2712 } else { 2713 Parse_Error(PARSE_FATAL, "Unknown keyword \"%s\"", 2714 *argv); 2715 free(words); 2716 return(FAILURE); 2717 } 2718 fullSpec = TRUE; 2719 } 2720 } 2721 2722 if (path == NULL) { 2723 /* 2724 * If no path was given, the user wants one of the pre-defined shells, 2725 * yes? So we find the one s/he wants with the help of JobMatchShell 2726 * and set things up the right way. shellPath will be set up by 2727 * Job_Init. 2728 */ 2729 if (newShell.name == NULL) { 2730 Parse_Error(PARSE_FATAL, "Neither path nor name specified"); 2731 return(FAILURE); 2732 } else { 2733 commandShell = JobMatchShell(newShell.name); 2734 shellName = newShell.name; 2735 } 2736 } else { 2737 /* 2738 * The user provided a path. If s/he gave nothing else (fullSpec is 2739 * FALSE), try and find a matching shell in the ones we know of. 2740 * Else we just take the specification at its word and copy it 2741 * to a new location. In either case, we need to record the 2742 * path the user gave for the shell. 2743 */ 2744 shellPath = path; 2745 path = strrchr(path, '/'); 2746 if (path == NULL) { 2747 path = shellPath; 2748 } else { 2749 path += 1; 2750 } 2751 if (newShell.name != NULL) { 2752 shellName = newShell.name; 2753 } else { 2754 shellName = path; 2755 } 2756 if (!fullSpec) { 2757 commandShell = JobMatchShell(shellName); 2758 } else { 2759 commandShell = (Shell *) emalloc(sizeof(Shell)); 2760 *commandShell = newShell; 2761 } 2762 } 2763 2764 if (commandShell->echoOn && commandShell->echoOff) { 2765 commandShell->hasEchoCtl = TRUE; 2766 } 2767 2768 if (!commandShell->hasErrCtl) { 2769 if (commandShell->errCheck == NULL) { 2770 commandShell->errCheck = ""; 2771 } 2772 if (commandShell->ignErr == NULL) { 2773 commandShell->ignErr = "%s\n"; 2774 } 2775 } 2776 2777 /* 2778 * Do not free up the words themselves, since they might be in use by the 2779 * shell specification. 2780 */ 2781 free(words); 2782 return SUCCESS; 2783 } 2784 2785 /*- 2786 *----------------------------------------------------------------------- 2787 * JobInterrupt -- 2788 * Handle the receipt of an interrupt. 2789 * 2790 * Results: 2791 * None 2792 * 2793 * Side Effects: 2794 * All children are killed. Another job will be started if the 2795 * .INTERRUPT target was given. 2796 *----------------------------------------------------------------------- 2797 */ 2798 static void 2799 JobInterrupt(runINTERRUPT, signo) 2800 int runINTERRUPT; /* Non-zero if commands for the .INTERRUPT 2801 * target should be executed */ 2802 int signo; /* signal received */ 2803 { 2804 LstNode ln; /* element in job table */ 2805 Job *job; /* job descriptor in that element */ 2806 GNode *interrupt; /* the node describing the .INTERRUPT target */ 2807 2808 aborting = ABORT_INTERRUPT; 2809 2810 (void) Lst_Open(jobs); 2811 while ((ln = Lst_Next(jobs)) != NILLNODE) { 2812 job = (Job *) Lst_Datum(ln); 2813 2814 if (!Targ_Precious(job->node)) { 2815 char *file = (job->node->path == NULL ? 2816 job->node->name : 2817 job->node->path); 2818 if (!noExecute && eunlink(file) != -1) { 2819 Error("*** %s removed", file); 2820 } 2821 } 2822 #ifdef RMT_WANTS_SIGNALS 2823 if (job->flags & JOB_REMOTE) { 2824 /* 2825 * If job is remote, let the Rmt module do the killing. 2826 */ 2827 if (!Rmt_Signal(job, signo)) { 2828 /* 2829 * If couldn't kill the thing, finish it out now with an 2830 * error code, since no exit report will come in likely. 2831 */ 2832 int status; 2833 2834 status.w_status = 0; 2835 status.w_retcode = 1; 2836 JobFinish(job, &status); 2837 } 2838 } else if (job->pid) { 2839 KILL(job->pid, signo); 2840 } 2841 #else 2842 if (job->pid) { 2843 if (DEBUG(JOB)) { 2844 (void) fprintf(stdout, 2845 "JobInterrupt passing signal to child %d.\n", 2846 job->pid); 2847 (void) fflush(stdout); 2848 } 2849 KILL(job->pid, signo); 2850 } 2851 #endif /* RMT_WANTS_SIGNALS */ 2852 } 2853 2854 #ifdef REMOTE 2855 (void)Lst_Open(stoppedJobs); 2856 while ((ln = Lst_Next(stoppedJobs)) != NILLNODE) { 2857 job = (Job *) Lst_Datum(ln); 2858 2859 if (job->flags & JOB_RESTART) { 2860 if (DEBUG(JOB)) { 2861 (void) fprintf(stdout, "%s%s", 2862 "JobInterrupt skipping job on stopped queue", 2863 "-- it was waiting to be restarted.\n"); 2864 (void) fflush(stdout); 2865 } 2866 continue; 2867 } 2868 if (!Targ_Precious(job->node)) { 2869 char *file = (job->node->path == NULL ? 2870 job->node->name : 2871 job->node->path); 2872 if (eunlink(file) == 0) { 2873 Error("*** %s removed", file); 2874 } 2875 } 2876 /* 2877 * Resume the thing so it will take the signal. 2878 */ 2879 if (DEBUG(JOB)) { 2880 (void) fprintf(stdout, 2881 "JobInterrupt passing CONT to stopped child %d.\n", 2882 job->pid); 2883 (void) fflush(stdout); 2884 } 2885 KILL(job->pid, SIGCONT); 2886 #ifdef RMT_WANTS_SIGNALS 2887 if (job->flags & JOB_REMOTE) { 2888 /* 2889 * If job is remote, let the Rmt module do the killing. 2890 */ 2891 if (!Rmt_Signal(job, SIGINT)) { 2892 /* 2893 * If couldn't kill the thing, finish it out now with an 2894 * error code, since no exit report will come in likely. 2895 */ 2896 int status; 2897 status.w_status = 0; 2898 status.w_retcode = 1; 2899 JobFinish(job, &status); 2900 } 2901 } else if (job->pid) { 2902 if (DEBUG(JOB)) { 2903 (void) fprintf(stdout, 2904 "JobInterrupt passing interrupt to stopped child %d.\n", 2905 job->pid); 2906 (void) fflush(stdout); 2907 } 2908 KILL(job->pid, SIGINT); 2909 } 2910 #endif /* RMT_WANTS_SIGNALS */ 2911 } 2912 #endif 2913 Lst_Close(stoppedJobs); 2914 2915 if (runINTERRUPT && !touchFlag) { 2916 interrupt = Targ_FindNode(".INTERRUPT", TARG_NOCREATE); 2917 if (interrupt != NILGNODE) { 2918 ignoreErrors = FALSE; 2919 2920 JobStart(interrupt, JOB_IGNDOTS, (Job *)0); 2921 while (nJobs) { 2922 Job_CatchOutput(); 2923 #ifndef RMT_WILL_WATCH 2924 Job_CatchChildren(!usePipes); 2925 #endif /* RMT_WILL_WATCH */ 2926 } 2927 } 2928 } 2929 exit(signo); 2930 } 2931 2932 /* 2933 *----------------------------------------------------------------------- 2934 * Job_Finish -- 2935 * Do final processing such as the running of the commands 2936 * attached to the .END target. 2937 * 2938 * Results: 2939 * Number of errors reported. 2940 * 2941 * Side Effects: 2942 * The process' temporary file (tfile) is removed if it still 2943 * existed. 2944 *----------------------------------------------------------------------- 2945 */ 2946 int 2947 Job_Finish() 2948 { 2949 if (postCommands != NILGNODE && !Lst_IsEmpty(postCommands->commands)) { 2950 if (errors) { 2951 Error("Errors reported so .END ignored"); 2952 } else { 2953 JobStart(postCommands, JOB_SPECIAL | JOB_IGNDOTS, NULL); 2954 2955 while (nJobs) { 2956 Job_CatchOutput(); 2957 #ifndef RMT_WILL_WATCH 2958 Job_CatchChildren(!usePipes); 2959 #endif /* RMT_WILL_WATCH */ 2960 } 2961 } 2962 } 2963 return(errors); 2964 } 2965 2966 /*- 2967 *----------------------------------------------------------------------- 2968 * Job_End -- 2969 * Cleanup any memory used by the jobs module 2970 * 2971 * Results: 2972 * None. 2973 * 2974 * Side Effects: 2975 * Memory is freed 2976 *----------------------------------------------------------------------- 2977 */ 2978 void 2979 Job_End() 2980 { 2981 #ifdef CLEANUP 2982 if (shellArgv) 2983 free(shellArgv); 2984 #endif 2985 } 2986 2987 /*- 2988 *----------------------------------------------------------------------- 2989 * Job_Wait -- 2990 * Waits for all running jobs to finish and returns. Sets 'aborting' 2991 * to ABORT_WAIT to prevent other jobs from starting. 2992 * 2993 * Results: 2994 * None. 2995 * 2996 * Side Effects: 2997 * Currently running jobs finish. 2998 * 2999 *----------------------------------------------------------------------- 3000 */ 3001 void 3002 Job_Wait() 3003 { 3004 aborting = ABORT_WAIT; 3005 while (nJobs != 0) { 3006 Job_CatchOutput(); 3007 #ifndef RMT_WILL_WATCH 3008 Job_CatchChildren(!usePipes); 3009 #endif /* RMT_WILL_WATCH */ 3010 } 3011 aborting = 0; 3012 } 3013 3014 /*- 3015 *----------------------------------------------------------------------- 3016 * Job_AbortAll -- 3017 * Abort all currently running jobs without handling output or anything. 3018 * This function is to be called only in the event of a major 3019 * error. Most definitely NOT to be called from JobInterrupt. 3020 * 3021 * Results: 3022 * None 3023 * 3024 * Side Effects: 3025 * All children are killed, not just the firstborn 3026 *----------------------------------------------------------------------- 3027 */ 3028 void 3029 Job_AbortAll() 3030 { 3031 LstNode ln; /* element in job table */ 3032 Job *job; /* the job descriptor in that element */ 3033 int foo; 3034 3035 aborting = ABORT_ERROR; 3036 3037 if (nJobs) { 3038 3039 (void) Lst_Open(jobs); 3040 while ((ln = Lst_Next(jobs)) != NILLNODE) { 3041 job = (Job *) Lst_Datum(ln); 3042 3043 /* 3044 * kill the child process with increasingly drastic signals to make 3045 * darn sure it's dead. 3046 */ 3047 #ifdef RMT_WANTS_SIGNALS 3048 if (job->flags & JOB_REMOTE) { 3049 Rmt_Signal(job, SIGINT); 3050 Rmt_Signal(job, SIGKILL); 3051 } else { 3052 KILL(job->pid, SIGINT); 3053 KILL(job->pid, SIGKILL); 3054 } 3055 #else 3056 KILL(job->pid, SIGINT); 3057 KILL(job->pid, SIGKILL); 3058 #endif /* RMT_WANTS_SIGNALS */ 3059 } 3060 } 3061 3062 /* 3063 * Catch as many children as want to report in at first, then give up 3064 */ 3065 while (waitpid((pid_t) -1, &foo, WNOHANG) > 0) 3066 continue; 3067 } 3068 3069 #ifdef REMOTE 3070 /*- 3071 *----------------------------------------------------------------------- 3072 * JobFlagForMigration -- 3073 * Handle the eviction of a child. Called from RmtStatusChange. 3074 * Flags the child as remigratable and then suspends it. 3075 * 3076 * Results: 3077 * none. 3078 * 3079 * Side Effects: 3080 * The job descriptor is flagged for remigration. 3081 * 3082 *----------------------------------------------------------------------- 3083 */ 3084 void 3085 JobFlagForMigration(hostID) 3086 int hostID; /* ID of host we used, for matching children. */ 3087 { 3088 register Job *job; /* job descriptor for dead child */ 3089 LstNode jnode; /* list element for finding job */ 3090 3091 if (DEBUG(JOB)) { 3092 (void) fprintf(stdout, "JobFlagForMigration(%d) called.\n", hostID); 3093 (void) fflush(stdout); 3094 } 3095 jnode = Lst_Find(jobs, (ClientData)hostID, JobCmpRmtID); 3096 3097 if (jnode == NILLNODE) { 3098 jnode = Lst_Find(stoppedJobs, (ClientData)hostID, JobCmpRmtID); 3099 if (jnode == NILLNODE) { 3100 if (DEBUG(JOB)) { 3101 Error("Evicting host(%d) not in table", hostID); 3102 } 3103 return; 3104 } 3105 } 3106 job = (Job *) Lst_Datum(jnode); 3107 3108 if (DEBUG(JOB)) { 3109 (void) fprintf(stdout, 3110 "JobFlagForMigration(%d) found job '%s'.\n", hostID, 3111 job->node->name); 3112 (void) fflush(stdout); 3113 } 3114 3115 KILL(job->pid, SIGSTOP); 3116 3117 job->flags |= JOB_REMIGRATE; 3118 } 3119 3120 #endif 3121 3122 /*- 3124 *----------------------------------------------------------------------- 3125 * JobRestartJobs -- 3126 * Tries to restart stopped jobs if there are slots available. 3127 * Note that this tries to restart them regardless of pending errors. 3128 * It's not good to leave stopped jobs lying around! 3129 * 3130 * Results: 3131 * None. 3132 * 3133 * Side Effects: 3134 * Resumes(and possibly migrates) jobs. 3135 * 3136 *----------------------------------------------------------------------- 3137 */ 3138 static void 3139 JobRestartJobs() 3140 { 3141 while (!jobFull && !Lst_IsEmpty(stoppedJobs)) { 3142 if (DEBUG(JOB)) { 3143 (void) fprintf(stdout, 3144 "Job queue is not full. Restarting a stopped job.\n"); 3145 (void) fflush(stdout); 3146 } 3147 JobRestart((Job *)Lst_DeQueue(stoppedJobs)); 3148 } 3149 } 3150
Indexes created Mon Oct 27 20:09:55 GMT 2025