job.c revision 1.62
1 /* $NetBSD: job.c,v 1.62 2002/03/13 17:46:03 pk Exp $ */ 2 3 /* 4 * Copyright (c) 1988, 1989, 1990 The Regents of the University of California. 5 * Copyright (c) 1988, 1989 by Adam de Boor 6 * Copyright (c) 1989 by Berkeley Softworks 7 * All rights reserved. 8 * 9 * This code is derived from software contributed to Berkeley by 10 * Adam de Boor. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. All advertising materials mentioning features or use of this software 21 * must display the following acknowledgement: 22 * This product includes software developed by the University of 23 * California, Berkeley and its contributors. 24 * 4. Neither the name of the University nor the names of its contributors 25 * may be used to endorse or promote products derived from this software 26 * without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 * SUCH DAMAGE. 39 */ 40 41 #ifdef MAKE_BOOTSTRAP 42 static char rcsid[] = "$NetBSD: job.c,v 1.62 2002/03/13 17:46:03 pk Exp $"; 43 #else 44 #include <sys/cdefs.h> 45 #ifndef lint 46 #if 0 47 static char sccsid[] = "@(#)job.c 8.2 (Berkeley) 3/19/94"; 48 #else 49 __RCSID("$NetBSD: job.c,v 1.62 2002/03/13 17:46:03 pk Exp $"); 50 #endif 51 #endif /* not lint */ 52 #endif 53 54 /*- 55 * job.c -- 56 * handle the creation etc. of our child processes. 57 * 58 * Interface: 59 * Job_Make Start the creation of the given target. 60 * 61 * Job_CatchChildren Check for and handle the termination of any 62 * children. This must be called reasonably 63 * frequently to keep the whole make going at 64 * a decent clip, since job table entries aren't 65 * removed until their process is caught this way. 66 * Its single argument is TRUE if the function 67 * should block waiting for a child to terminate. 68 * 69 * Job_CatchOutput Print any output our children have produced. 70 * Should also be called fairly frequently to 71 * keep the user informed of what's going on. 72 * If no output is waiting, it will block for 73 * a time given by the SEL_* constants, below, 74 * or until output is ready. 75 * 76 * Job_Init Called to intialize this module. in addition, 77 * any commands attached to the .BEGIN target 78 * are executed before this function returns. 79 * Hence, the makefile must have been parsed 80 * before this function is called. 81 * 82 * Job_End Cleanup any memory used. 83 * 84 * Job_Empty Return TRUE if the job table is completely 85 * empty. 86 * 87 * Job_ParseShell Given the line following a .SHELL target, parse 88 * the line as a shell specification. Returns 89 * FAILURE if the spec was incorrect. 90 * 91 * Job_Finish Perform any final processing which needs doing. 92 * This includes the execution of any commands 93 * which have been/were attached to the .END 94 * target. It should only be called when the 95 * job table is empty. 96 * 97 * Job_AbortAll Abort all currently running jobs. It doesn't 98 * handle output or do anything for the jobs, 99 * just kills them. It should only be called in 100 * an emergency, as it were. 101 * 102 * Job_CheckCommands Verify that the commands for a target are 103 * ok. Provide them if necessary and possible. 104 * 105 * Job_Touch Update a target without really updating it. 106 * 107 * Job_Wait Wait for all currently-running jobs to finish. 108 */ 109 110 #include <sys/types.h> 111 #include <sys/stat.h> 112 #include <sys/file.h> 113 #include <sys/time.h> 114 #include <sys/wait.h> 115 #include <fcntl.h> 116 #include <errno.h> 117 #include <utime.h> 118 #include <stdio.h> 119 #include <string.h> 120 #include <signal.h> 121 #ifndef RMT_WILL_WATCH 122 #ifndef USE_SELECT 123 #include <poll.h> 124 #endif 125 #endif 126 #include "make.h" 127 #include "hash.h" 128 #include "dir.h" 129 #include "job.h" 130 #include "pathnames.h" 131 #include "trace.h" 132 #ifdef REMOTE 133 #include "rmt.h" 134 # define STATIC 135 #else 136 # define STATIC static 137 #endif 138 139 /* 140 * error handling variables 141 */ 142 static int errors = 0; /* number of errors reported */ 143 static int aborting = 0; /* why is the make aborting? */ 144 #define ABORT_ERROR 1 /* Because of an error */ 145 #define ABORT_INTERRUPT 2 /* Because it was interrupted */ 146 #define ABORT_WAIT 3 /* Waiting for jobs to finish */ 147 148 /* 149 * XXX: Avoid SunOS bug... FILENO() is fp->_file, and file 150 * is a char! So when we go above 127 we turn negative! 151 */ 152 #define FILENO(a) ((unsigned) fileno(a)) 153 154 /* 155 * post-make command processing. The node postCommands is really just the 156 * .END target but we keep it around to avoid having to search for it 157 * all the time. 158 */ 159 static GNode *postCommands; /* node containing commands to execute when 160 * everything else is done */ 161 static int numCommands; /* The number of commands actually printed 162 * for a target. Should this number be 163 * 0, no shell will be executed. */ 164 165 /* 166 * Return values from JobStart. 167 */ 168 #define JOB_RUNNING 0 /* Job is running */ 169 #define JOB_ERROR 1 /* Error in starting the job */ 170 #define JOB_FINISHED 2 /* The job is already finished */ 171 #define JOB_STOPPED 3 /* The job is stopped */ 172 173 174 175 /* 176 * Descriptions for various shells. 177 */ 178 static Shell shells[] = { 179 /* 180 * CSH description. The csh can do echo control by playing 181 * with the setting of the 'echo' shell variable. Sadly, 182 * however, it is unable to do error control nicely. 183 */ 184 { 185 "csh", 186 TRUE, "unset verbose", "set verbose", "unset verbose", 10, 187 FALSE, "echo \"%s\"\n", "csh -c \"%s || exit 0\"", 188 "v", "e", 189 }, 190 /* 191 * SH description. Echo control is also possible and, under 192 * sun UNIX anyway, one can even control error checking. 193 */ 194 { 195 "sh", 196 TRUE, "set -", "set -v", "set -", 5, 197 TRUE, "set -e", "set +e", 198 #ifdef OLDBOURNESHELL 199 FALSE, "echo \"%s\"\n", "sh -c '%s || exit 0'\n", 200 #endif 201 #ifdef __NetBSD__ 202 "vq", 203 #else 204 "v", 205 #endif 206 "e", 207 }, 208 /* 209 * UNKNOWN. 210 */ 211 { 212 (char *) 0, 213 FALSE, (char *) 0, (char *) 0, (char *) 0, 0, 214 FALSE, (char *) 0, (char *) 0, 215 (char *) 0, (char *) 0, 216 } 217 }; 218 static Shell *commandShell = &shells[DEFSHELL];/* this is the shell to 219 * which we pass all 220 * commands in the Makefile. 221 * It is set by the 222 * Job_ParseShell function */ 223 static char *shellPath = NULL, /* full pathname of 224 * executable image */ 225 *shellName = NULL, /* last component of shell */ 226 *shellArgv = NULL; /* Custom shell args */ 227 228 229 static int maxJobs; /* The most children we can run at once */ 230 static int maxLocal; /* The most local ones we can have */ 231 STATIC int nJobs; /* The number of children currently running */ 232 STATIC int nLocal; /* The number of local children */ 233 STATIC Lst jobs; /* The structures that describe them */ 234 static Boolean wantToken; /* we want a token */ 235 236 /* 237 * Set of descriptors of pipes connected to 238 * the output channels of children 239 */ 240 #ifndef RMT_WILL_WATCH 241 #ifdef USE_SELECT 242 static fd_set outputs; 243 #else 244 static struct pollfd *fds = NULL; 245 static Job **jobfds = NULL; 246 static int nfds = 0; 247 static int maxfds = 0; 248 static void watchfd __P((Job *)); 249 static void clearfd __P((Job *)); 250 static int readyfd __P((Job *)); 251 #define JBSTART 256 252 #define JBFACTOR 2 253 #endif 254 #endif 255 256 STATIC GNode *lastNode; /* The node for which output was most recently 257 * produced. */ 258 STATIC char *targFmt; /* Format string to use to head output from a 259 * job when it's not the most-recent job heard 260 * from */ 261 static Job tokenWaitJob; /* token wait pseudo-job */ 262 int job_pipe[2] = { -1, -1 }; /* job server pipes. */ 263 264 #ifdef REMOTE 265 # define TARG_FMT "--- %s at %s ---\n" /* Default format */ 266 # define MESSAGE(fp, gn) \ 267 (void) fprintf(fp, targFmt, gn->name, gn->rem.hname) 268 #else 269 # define TARG_FMT "--- %s ---\n" /* Default format */ 270 # define MESSAGE(fp, gn) \ 271 (void) fprintf(fp, targFmt, gn->name) 272 #endif 273 274 /* 275 * When JobStart attempts to run a job remotely but can't, and isn't allowed 276 * to run the job locally, or when Job_CatchChildren detects a job that has 277 * been migrated home, the job is placed on the stoppedJobs queue to be run 278 * when the next job finishes. 279 */ 280 STATIC Lst stoppedJobs; /* Lst of Job structures describing 281 * jobs that were stopped due to concurrency 282 * limits or migration home */ 283 284 285 #if defined(USE_PGRP) && defined(SYSV) 286 # define KILL(pid, sig) kill(-(pid), (sig)) 287 #else 288 # if defined(USE_PGRP) 289 # define KILL(pid, sig) killpg((pid), (sig)) 290 # else 291 # define KILL(pid, sig) kill((pid), (sig)) 292 # endif 293 #endif 294 295 /* 296 * Grmpf... There is no way to set bits of the wait structure 297 * anymore with the stupid W*() macros. I liked the union wait 298 * stuff much more. So, we devise our own macros... This is 299 * really ugly, use dramamine sparingly. You have been warned. 300 */ 301 #ifndef W_STOPCODE 302 #define W_STOPCODE(sig) (((sig) << 8) | 0177) 303 #endif 304 #ifndef W_EXITCODE 305 #define W_EXITCODE(ret, sig) ((ret << 8) | (sig)) 306 #endif 307 308 static int JobCondPassSig __P((ClientData, ClientData)); 309 static void JobPassSig __P((int)); 310 static void JobIgnoreSig __P((int)); 311 #ifdef USE_PGRP 312 static void JobContinueSig __P((int)); 313 #endif 314 static int JobCmpPid __P((ClientData, ClientData)); 315 static int JobPrintCommand __P((ClientData, ClientData)); 316 static int JobSaveCommand __P((ClientData, ClientData)); 317 static void JobClose __P((Job *)); 318 #ifdef REMOTE 319 static int JobCmpRmtID __P((Job *, int)); 320 # ifdef RMT_WILL_WATCH 321 static void JobLocalInput __P((int, Job *)); 322 # endif 323 #else 324 static void JobFinish __P((Job *, int *)); 325 static void JobExec __P((Job *, char **)); 326 #endif 327 static void JobMakeArgv __P((Job *, char **)); 328 static int JobRestart __P((Job *)); 329 static int JobStart __P((GNode *, int, Job *)); 330 static char *JobOutput __P((Job *, char *, char *, int)); 331 static void JobDoOutput __P((Job *, Boolean)); 332 static Shell *JobMatchShell __P((char *)); 333 static void JobInterrupt __P((int, int)); 334 static void JobRestartJobs __P((void)); 335 static void JobTokenAdd __P((void)); 336 337 /*- 338 *----------------------------------------------------------------------- 339 * JobCondPassSig -- 340 * Pass a signal to a job if the job is remote or if USE_PGRP 341 * is defined. 342 * 343 * Results: 344 * === 0 345 * 346 * Side Effects: 347 * None, except the job may bite it. 348 * 349 *----------------------------------------------------------------------- 350 */ 351 static int 352 JobCondPassSig(jobp, signop) 353 ClientData jobp; /* Job to biff */ 354 ClientData signop; /* Signal to send it */ 355 { 356 Job *job = (Job *) jobp; 357 int signo = *(int *) signop; 358 #ifdef RMT_WANTS_SIGNALS 359 if (job->flags & JOB_REMOTE) { 360 (void) Rmt_Signal(job, signo); 361 } else { 362 KILL(job->pid, signo); 363 } 364 #else 365 /* 366 * Assume that sending the signal to job->pid will signal any remote 367 * job as well. 368 */ 369 if (DEBUG(JOB)) { 370 (void) fprintf(stdout, 371 "JobCondPassSig passing signal %d to child %d.\n", 372 signo, job->pid); 373 (void) fflush(stdout); 374 } 375 KILL(job->pid, signo); 376 #endif 377 return 0; 378 } 379 380 /*- 381 *----------------------------------------------------------------------- 382 * JobIgnoreSig -- 383 * No-op signal handler so we wake up from poll. 384 * 385 * Results: 386 * None. 387 * 388 * Side Effects: 389 * None. 390 * 391 *----------------------------------------------------------------------- 392 */ 393 static void 394 JobIgnoreSig(signo) 395 int signo; /* The signal number we've received */ 396 { 397 /* 398 * Do nothing. The mere fact that we've been called will cause 399 * poll/select in Job_CatchOutput() to return early. 400 */ 401 } 402 403 404 #ifdef USE_PGRP 405 /*- 406 *----------------------------------------------------------------------- 407 * JobContinueSig -- 408 * Resume all stopped jobs. 409 * 410 * Results: 411 * None. 412 * 413 * Side Effects: 414 * Jobs start running again. 415 * 416 *----------------------------------------------------------------------- 417 */ 418 static void 419 JobContinueSig(signo) 420 int signo; /* The signal number we've received */ 421 { 422 if (signal(SIGTSTP, SIG_IGN) != SIG_IGN) { 423 (void) signal(SIGTSTP, JobPassSig); 424 } 425 JobRestartJobs(); 426 } 427 #endif 428 429 /*- 430 *----------------------------------------------------------------------- 431 * JobPassSig -- 432 * Pass a signal on to all remote jobs and to all local jobs if 433 * USE_PGRP is defined, then die ourselves. 434 * 435 * Results: 436 * None. 437 * 438 * Side Effects: 439 * We die by the same signal. 440 * 441 *----------------------------------------------------------------------- 442 */ 443 static void 444 JobPassSig(signo) 445 int signo; /* The signal number we've received */ 446 { 447 sigset_t nmask, omask; 448 struct sigaction act; 449 int sigcont; 450 451 if (DEBUG(JOB)) { 452 (void) fprintf(stdout, "JobPassSig(%d) called.\n", signo); 453 (void) fflush(stdout); 454 } 455 Lst_ForEach(jobs, JobCondPassSig, (ClientData) &signo); 456 457 /* 458 * Deal with proper cleanup based on the signal received. We only run 459 * the .INTERRUPT target if the signal was in fact an interrupt. The other 460 * three termination signals are more of a "get out *now*" command. 461 */ 462 if (signo == SIGINT) { 463 JobInterrupt(TRUE, signo); 464 } else if ((signo == SIGHUP) || (signo == SIGTERM) || (signo == SIGQUIT)) { 465 JobInterrupt(FALSE, signo); 466 } 467 468 /* 469 * Leave gracefully if SIGQUIT, rather than core dumping. 470 */ 471 if (signo == SIGQUIT) { 472 Finish(0); 473 } 474 475 if (signo == SIGTSTP) { 476 Job_CatchChildren(FALSE); 477 } 478 /* 479 * Send ourselves the signal now we've given the message to everyone else. 480 * Note we block everything else possible while we're getting the signal. 481 * This ensures that all our jobs get continued when we wake up before 482 * we take any other signal. 483 */ 484 sigfillset(&nmask); 485 sigprocmask(SIG_SETMASK, &nmask, &omask); 486 act.sa_handler = SIG_DFL; 487 sigemptyset(&act.sa_mask); 488 act.sa_flags = 0; 489 sigaction(signo, &act, NULL); 490 491 if (DEBUG(JOB)) { 492 (void) fprintf(stdout, 493 "JobPassSig passing signal %d to self.\n", signo); 494 (void) fflush(stdout); 495 } 496 497 (void) kill(getpid(), signo); 498 if (signo != SIGTSTP) { 499 sigcont = SIGCONT; 500 Lst_ForEach(jobs, JobCondPassSig, (ClientData) &sigcont); 501 } 502 503 (void) sigprocmask(SIG_SETMASK, &omask, NULL); 504 sigprocmask(SIG_SETMASK, &omask, NULL); 505 if (signo != SIGCONT && signo != SIGTSTP) { 506 act.sa_handler = JobPassSig; 507 sigaction(sigcont, &act, NULL); 508 } 509 } 510 511 /*- 512 *----------------------------------------------------------------------- 513 * JobCmpPid -- 514 * Compare the pid of the job with the given pid and return 0 if they 515 * are equal. This function is called from Job_CatchChildren via 516 * Lst_Find to find the job descriptor of the finished job. 517 * 518 * Results: 519 * 0 if the pid's match 520 * 521 * Side Effects: 522 * None 523 *----------------------------------------------------------------------- 524 */ 525 static int 526 JobCmpPid(job, pid) 527 ClientData job; /* job to examine */ 528 ClientData pid; /* process id desired */ 529 { 530 return *(int *) pid - ((Job *) job)->pid; 531 } 532 533 #ifdef REMOTE 534 /*- 535 *----------------------------------------------------------------------- 536 * JobCmpRmtID -- 537 * Compare the rmtID of the job with the given rmtID and return 0 if they 538 * are equal. 539 * 540 * Results: 541 * 0 if the rmtID's match 542 * 543 * Side Effects: 544 * None. 545 *----------------------------------------------------------------------- 546 */ 547 static int 548 JobCmpRmtID(job, rmtID) 549 ClientData job; /* job to examine */ 550 ClientData rmtID; /* remote id desired */ 551 { 552 return(*(int *) rmtID - *(int *) job->rmtID); 553 } 554 #endif 555 556 /*- 557 *----------------------------------------------------------------------- 558 * JobPrintCommand -- 559 * Put out another command for the given job. If the command starts 560 * with an @ or a - we process it specially. In the former case, 561 * so long as the -s and -n flags weren't given to make, we stick 562 * a shell-specific echoOff command in the script. In the latter, 563 * we ignore errors for the entire job, unless the shell has error 564 * control. 565 * If the command is just "..." we take all future commands for this 566 * job to be commands to be executed once the entire graph has been 567 * made and return non-zero to signal that the end of the commands 568 * was reached. These commands are later attached to the postCommands 569 * node and executed by Job_End when all things are done. 570 * This function is called from JobStart via Lst_ForEach. 571 * 572 * Results: 573 * Always 0, unless the command was "..." 574 * 575 * Side Effects: 576 * If the command begins with a '-' and the shell has no error control, 577 * the JOB_IGNERR flag is set in the job descriptor. 578 * If the command is "..." and we're not ignoring such things, 579 * tailCmds is set to the successor node of the cmd. 580 * numCommands is incremented if the command is actually printed. 581 *----------------------------------------------------------------------- 582 */ 583 static int 584 JobPrintCommand(cmdp, jobp) 585 ClientData cmdp; /* command string to print */ 586 ClientData jobp; /* job for which to print it */ 587 { 588 Boolean noSpecials; /* true if we shouldn't worry about 589 * inserting special commands into 590 * the input stream. */ 591 Boolean shutUp = FALSE; /* true if we put a no echo command 592 * into the command file */ 593 Boolean errOff = FALSE; /* true if we turned error checking 594 * off before printing the command 595 * and need to turn it back on */ 596 char *cmdTemplate; /* Template to use when printing the 597 * command */ 598 char *cmdStart; /* Start of expanded command */ 599 char *cmd = (char *) cmdp; 600 Job *job = (Job *) jobp; 601 char *cp; 602 603 noSpecials = NoExecute(job->node); 604 605 if (strcmp(cmd, "...") == 0) { 606 job->node->type |= OP_SAVE_CMDS; 607 if ((job->flags & JOB_IGNDOTS) == 0) { 608 job->tailCmds = Lst_Succ(Lst_Member(job->node->commands, 609 (ClientData)cmd)); 610 return 1; 611 } 612 return 0; 613 } 614 615 #define DBPRINTF(fmt, arg) if (DEBUG(JOB)) { \ 616 (void) fprintf(stdout, fmt, arg); \ 617 (void) fflush(stdout); \ 618 } \ 619 (void) fprintf(job->cmdFILE, fmt, arg); \ 620 (void) fflush(job->cmdFILE); 621 622 numCommands += 1; 623 624 cmdStart = cmd = Var_Subst(NULL, cmd, job->node, FALSE); 625 626 cmdTemplate = "%s\n"; 627 628 /* 629 * Check for leading @' and -'s to control echoing and error checking. 630 */ 631 while (*cmd == '@' || *cmd == '-') { 632 if (*cmd == '@') { 633 shutUp = TRUE; 634 } else { 635 errOff = TRUE; 636 } 637 cmd++; 638 } 639 640 while (isspace((unsigned char) *cmd)) 641 cmd++; 642 643 if (shutUp) { 644 if (!(job->flags & JOB_SILENT) && !noSpecials && 645 commandShell->hasEchoCtl) { 646 DBPRINTF("%s\n", commandShell->echoOff); 647 } else { 648 shutUp = FALSE; 649 } 650 } 651 652 if (errOff) { 653 if ( !(job->flags & JOB_IGNERR) && !noSpecials) { 654 if (commandShell->hasErrCtl) { 655 /* 656 * we don't want the error-control commands showing 657 * up either, so we turn off echoing while executing 658 * them. We could put another field in the shell 659 * structure to tell JobDoOutput to look for this 660 * string too, but why make it any more complex than 661 * it already is? 662 */ 663 if (!(job->flags & JOB_SILENT) && !shutUp && 664 commandShell->hasEchoCtl) { 665 DBPRINTF("%s\n", commandShell->echoOff); 666 DBPRINTF("%s\n", commandShell->ignErr); 667 DBPRINTF("%s\n", commandShell->echoOn); 668 } else { 669 DBPRINTF("%s\n", commandShell->ignErr); 670 } 671 } else if (commandShell->ignErr && 672 (*commandShell->ignErr != '\0')) 673 { 674 /* 675 * The shell has no error control, so we need to be 676 * weird to get it to ignore any errors from the command. 677 * If echoing is turned on, we turn it off and use the 678 * errCheck template to echo the command. Leave echoing 679 * off so the user doesn't see the weirdness we go through 680 * to ignore errors. Set cmdTemplate to use the weirdness 681 * instead of the simple "%s\n" template. 682 */ 683 if (!(job->flags & JOB_SILENT) && !shutUp && 684 commandShell->hasEchoCtl) { 685 DBPRINTF("%s\n", commandShell->echoOff); 686 DBPRINTF(commandShell->errCheck, cmd); 687 shutUp = TRUE; 688 } 689 cmdTemplate = commandShell->ignErr; 690 /* 691 * The error ignoration (hee hee) is already taken care 692 * of by the ignErr template, so pretend error checking 693 * is still on. 694 */ 695 errOff = FALSE; 696 } else { 697 errOff = FALSE; 698 } 699 } else { 700 errOff = FALSE; 701 } 702 } 703 704 if (DEBUG(SHELL) && strcmp(shellName, "sh") == 0 && 705 (job->flags & JOB_TRACED) == 0) { 706 DBPRINTF("set -%s\n", "x"); 707 job->flags |= JOB_TRACED; 708 } 709 710 if ((cp = Check_Cwd_Cmd(cmd)) != NULL) { 711 DBPRINTF("test -d %s && ", cp); 712 DBPRINTF("cd %s; ", cp); 713 } 714 DBPRINTF(cmdTemplate, cmd); 715 free(cmdStart); 716 717 if (errOff) { 718 /* 719 * If echoing is already off, there's no point in issuing the 720 * echoOff command. Otherwise we issue it and pretend it was on 721 * for the whole command... 722 */ 723 if (!shutUp && !(job->flags & JOB_SILENT) && commandShell->hasEchoCtl){ 724 DBPRINTF("%s\n", commandShell->echoOff); 725 shutUp = TRUE; 726 } 727 DBPRINTF("%s\n", commandShell->errCheck); 728 } 729 if (shutUp) { 730 DBPRINTF("%s\n", commandShell->echoOn); 731 } 732 return 0; 733 } 734 735 /*- 736 *----------------------------------------------------------------------- 737 * JobSaveCommand -- 738 * Save a command to be executed when everything else is done. 739 * Callback function for JobFinish... 740 * 741 * Results: 742 * Always returns 0 743 * 744 * Side Effects: 745 * The command is tacked onto the end of postCommands's commands list. 746 * 747 *----------------------------------------------------------------------- 748 */ 749 static int 750 JobSaveCommand(cmd, gn) 751 ClientData cmd; 752 ClientData gn; 753 { 754 cmd = (ClientData) Var_Subst(NULL, (char *) cmd, (GNode *) gn, FALSE); 755 (void) Lst_AtEnd(postCommands->commands, cmd); 756 return(0); 757 } 758 759 760 /*- 761 *----------------------------------------------------------------------- 762 * JobClose -- 763 * Called to close both input and output pipes when a job is finished. 764 * 765 * Results: 766 * Nada 767 * 768 * Side Effects: 769 * The file descriptors associated with the job are closed. 770 * 771 *----------------------------------------------------------------------- 772 */ 773 static void 774 JobClose(job) 775 Job *job; 776 { 777 if (usePipes && (job->flags & JOB_FIRST)) { 778 #ifdef RMT_WILL_WATCH 779 Rmt_Ignore(job->inPipe); 780 #else 781 #ifdef USE_SELECT 782 FD_CLR(job->inPipe, &outputs); 783 #else 784 clearfd(job); 785 #endif 786 #endif 787 if (job->outPipe != job->inPipe) { 788 (void) close(job->outPipe); 789 } 790 JobDoOutput(job, TRUE); 791 (void) close(job->inPipe); 792 } else { 793 (void) close(job->outFd); 794 JobDoOutput(job, TRUE); 795 } 796 } 797 798 /*- 799 *----------------------------------------------------------------------- 800 * JobFinish -- 801 * Do final processing for the given job including updating 802 * parents and starting new jobs as available/necessary. Note 803 * that we pay no attention to the JOB_IGNERR flag here. 804 * This is because when we're called because of a noexecute flag 805 * or something, jstat.w_status is 0 and when called from 806 * Job_CatchChildren, the status is zeroed if it s/b ignored. 807 * 808 * Results: 809 * None 810 * 811 * Side Effects: 812 * Some nodes may be put on the toBeMade queue. 813 * Final commands for the job are placed on postCommands. 814 * 815 * If we got an error and are aborting (aborting == ABORT_ERROR) and 816 * the job list is now empty, we are done for the day. 817 * If we recognized an error (errors !=0), we set the aborting flag 818 * to ABORT_ERROR so no more jobs will be started. 819 *----------------------------------------------------------------------- 820 */ 821 /*ARGSUSED*/ 822 static void 823 JobFinish(job, status) 824 Job *job; /* job to finish */ 825 int *status; /* sub-why job went away */ 826 { 827 Boolean done; 828 829 if ((WIFEXITED(*status) && 830 (((WEXITSTATUS(*status) != 0) && !(job->flags & JOB_IGNERR)))) || 831 WIFSIGNALED(*status)) 832 { 833 /* 834 * If it exited non-zero and either we're doing things our 835 * way or we're not ignoring errors, the job is finished. 836 * Similarly, if the shell died because of a signal 837 * the job is also finished. In these 838 * cases, finish out the job's output before printing the exit 839 * status... 840 */ 841 #ifdef REMOTE 842 KILL(job->pid, SIGCONT); 843 #endif 844 JobClose(job); 845 if (job->cmdFILE != NULL && job->cmdFILE != stdout) { 846 (void) fclose(job->cmdFILE); 847 job->cmdFILE = NULL; 848 } 849 done = TRUE; 850 #ifdef REMOTE 851 if (job->flags & JOB_REMOTE) 852 Rmt_Done(job->rmtID, job->node); 853 #endif 854 } else if (WIFEXITED(*status)) { 855 /* 856 * Deal with ignored errors in -B mode. We need to print a message 857 * telling of the ignored error as well as setting status.w_status 858 * to 0 so the next command gets run. To do this, we set done to be 859 * TRUE if in -B mode and the job exited non-zero. 860 */ 861 done = WEXITSTATUS(*status) != 0; 862 /* 863 * Old comment said: "Note we don't 864 * want to close down any of the streams until we know we're at the 865 * end." 866 * But we do. Otherwise when are we going to print the rest of the 867 * stuff? 868 */ 869 JobClose(job); 870 #ifdef REMOTE 871 if (job->flags & JOB_REMOTE) 872 Rmt_Done(job->rmtID, job->node); 873 #endif /* REMOTE */ 874 } else { 875 /* 876 * No need to close things down or anything. 877 */ 878 done = FALSE; 879 } 880 881 if (done || 882 WIFSTOPPED(*status) || 883 (WIFSIGNALED(*status) && (WTERMSIG(*status) == SIGCONT))) 884 { 885 FILE *out; 886 887 if (compatMake && !usePipes && (job->flags & JOB_IGNERR)) { 888 /* 889 * If output is going to a file and this job is ignoring 890 * errors, arrange to have the exit status sent to the 891 * output file as well. 892 */ 893 out = fdopen(job->outFd, "w"); 894 if (out == NULL) 895 Punt("Cannot fdopen"); 896 } else { 897 out = stdout; 898 } 899 900 if (WIFEXITED(*status)) { 901 if (DEBUG(JOB)) { 902 (void) fprintf(stdout, "Process %d [%s] exited.\n", 903 job->pid, job->node->name); 904 (void) fflush(stdout); 905 } 906 if (WEXITSTATUS(*status) != 0) { 907 if (usePipes && job->node != lastNode) { 908 MESSAGE(out, job->node); 909 lastNode = job->node; 910 } 911 (void) fprintf(out, "*** [%s] Error code %d%s\n", 912 job->node->name, 913 WEXITSTATUS(*status), 914 (job->flags & JOB_IGNERR) ? "(ignored)" : ""); 915 916 if (job->flags & JOB_IGNERR) { 917 *status = 0; 918 } 919 } else if (DEBUG(JOB)) { 920 if (usePipes && job->node != lastNode) { 921 MESSAGE(out, job->node); 922 lastNode = job->node; 923 } 924 (void) fprintf(out, "*** [%s] Completed successfully\n", 925 job->node->name); 926 } 927 } else if (WIFSTOPPED(*status) && WSTOPSIG(*status) != SIGCONT) { 928 if (DEBUG(JOB)) { 929 (void) fprintf(stdout, "Process %d (%s) stopped.\n", 930 job->pid, job->node->name); 931 (void) fflush(stdout); 932 } 933 if (usePipes && job->node != lastNode) { 934 MESSAGE(out, job->node); 935 lastNode = job->node; 936 } 937 if (!(job->flags & JOB_REMIGRATE)) { 938 switch (WSTOPSIG(*status)) { 939 case SIGTSTP: 940 (void) fprintf(out, "*** [%s] Suspended\n", 941 job->node->name); 942 break; 943 case SIGSTOP: 944 (void) fprintf(out, "*** [%s] Stopped\n", 945 job->node->name); 946 break; 947 default: 948 (void) fprintf(out, "*** [%s] Stopped -- signal %d\n", 949 job->node->name, WSTOPSIG(*status)); 950 } 951 } 952 job->flags |= JOB_RESUME; 953 (void)Lst_AtEnd(stoppedJobs, (ClientData)job); 954 #ifdef REMOTE 955 if (job->flags & JOB_REMIGRATE) 956 JobRestart(job); 957 #endif 958 (void) fflush(out); 959 return; 960 } else if (WIFSTOPPED(*status) && WSTOPSIG(*status) == SIGCONT) { 961 /* 962 * If the beastie has continued, shift the Job from the stopped 963 * list to the running one (or re-stop it if concurrency is 964 * exceeded) and go and get another child. 965 */ 966 if (job->flags & (JOB_RESUME|JOB_REMIGRATE|JOB_RESTART)) { 967 if (usePipes && job->node != lastNode) { 968 MESSAGE(out, job->node); 969 lastNode = job->node; 970 } 971 (void) fprintf(out, "*** [%s] Continued\n", job->node->name); 972 } 973 if (!(job->flags & JOB_CONTINUING)) { 974 if (DEBUG(JOB)) { 975 (void) fprintf(stdout, 976 "Warning: process %d [%s] was not continuing.\n", 977 job->pid, job->node->name); 978 (void) fflush(stdout); 979 } 980 #ifdef notdef 981 /* 982 * We don't really want to restart a job from scratch just 983 * because it continued, especially not without killing the 984 * continuing process! That's why this is ifdef'ed out. 985 * FD - 9/17/90 986 */ 987 JobRestart(job); 988 #endif 989 } 990 job->flags &= ~JOB_CONTINUING; 991 Lst_AtEnd(jobs, (ClientData)job); 992 nJobs += 1; 993 if (!(job->flags & JOB_REMOTE)) { 994 if (DEBUG(JOB)) { 995 (void) fprintf(stdout, 996 "Process %d is continuing locally.\n", 997 job->pid); 998 (void) fflush(stdout); 999 } 1000 nLocal += 1; 1001 } 1002 (void) fflush(out); 1003 return; 1004 } else { 1005 if (usePipes && job->node != lastNode) { 1006 MESSAGE(out, job->node); 1007 lastNode = job->node; 1008 } 1009 (void) fprintf(out, "*** [%s] Signal %d\n", 1010 job->node->name, WTERMSIG(*status)); 1011 } 1012 1013 (void) fflush(out); 1014 } 1015 1016 /* 1017 * Now handle the -B-mode stuff. If the beast still isn't finished, 1018 * try and restart the job on the next command. If JobStart says it's 1019 * ok, it's ok. If there's an error, this puppy is done. 1020 */ 1021 if (compatMake && (WIFEXITED(*status) && 1022 !Lst_IsAtEnd(job->node->commands))) { 1023 switch (JobStart(job->node, job->flags & JOB_IGNDOTS, job)) { 1024 case JOB_RUNNING: 1025 done = FALSE; 1026 break; 1027 case JOB_ERROR: 1028 done = TRUE; 1029 *status = W_EXITCODE(1, 0); 1030 break; 1031 case JOB_FINISHED: 1032 /* 1033 * If we got back a JOB_FINISHED code, JobStart has already 1034 * called Make_Update and freed the job descriptor. We set 1035 * done to false here to avoid fake cycles and double frees. 1036 * JobStart needs to do the update so we can proceed up the 1037 * graph when given the -n flag.. 1038 */ 1039 done = FALSE; 1040 break; 1041 } 1042 } else { 1043 done = TRUE; 1044 } 1045 1046 if (done) { 1047 Trace_Log(JOBEND, job); 1048 if (!compatMake && !(job->flags & JOB_SPECIAL)) { 1049 if ((*status != 0) || 1050 (aborting == ABORT_ERROR) || 1051 (aborting == ABORT_INTERRUPT)) 1052 Job_TokenReturn(); 1053 } 1054 1055 } 1056 1057 if (done && 1058 (aborting != ABORT_ERROR) && 1059 (aborting != ABORT_INTERRUPT) && 1060 (*status == 0)) 1061 { 1062 /* 1063 * As long as we aren't aborting and the job didn't return a non-zero 1064 * status that we shouldn't ignore, we call Make_Update to update 1065 * the parents. In addition, any saved commands for the node are placed 1066 * on the .END target. 1067 */ 1068 if (job->tailCmds != NILLNODE) { 1069 Lst_ForEachFrom(job->node->commands, job->tailCmds, 1070 JobSaveCommand, 1071 (ClientData)job->node); 1072 } 1073 job->node->made = MADE; 1074 if (!(job->flags & JOB_SPECIAL)) 1075 Job_TokenReturn(); 1076 Make_Update(job->node); 1077 free((Address)job); 1078 } else if (*status != 0) { 1079 errors += 1; 1080 free((Address)job); 1081 } 1082 JobRestartJobs(); 1083 1084 /* 1085 * Set aborting if any error. 1086 */ 1087 if (errors && !keepgoing && (aborting != ABORT_INTERRUPT)) { 1088 /* 1089 * If we found any errors in this batch of children and the -k flag 1090 * wasn't given, we set the aborting flag so no more jobs get 1091 * started. 1092 */ 1093 aborting = ABORT_ERROR; 1094 } 1095 1096 if ((aborting == ABORT_ERROR) && Job_Empty()) { 1097 /* 1098 * If we are aborting and the job table is now empty, we finish. 1099 */ 1100 Finish(errors); 1101 } 1102 } 1103 1104 /*- 1105 *----------------------------------------------------------------------- 1106 * Job_Touch -- 1107 * Touch the given target. Called by JobStart when the -t flag was 1108 * given 1109 * 1110 * Results: 1111 * None 1112 * 1113 * Side Effects: 1114 * The data modification of the file is changed. In addition, if the 1115 * file did not exist, it is created. 1116 *----------------------------------------------------------------------- 1117 */ 1118 void 1119 Job_Touch(gn, silent) 1120 GNode *gn; /* the node of the file to touch */ 1121 Boolean silent; /* TRUE if should not print messages */ 1122 { 1123 int streamID; /* ID of stream opened to do the touch */ 1124 struct utimbuf times; /* Times for utime() call */ 1125 1126 if (gn->type & (OP_JOIN|OP_USE|OP_USEBEFORE|OP_EXEC|OP_OPTIONAL|OP_PHONY)) { 1127 /* 1128 * .JOIN, .USE, .ZEROTIME and .OPTIONAL targets are "virtual" targets 1129 * and, as such, shouldn't really be created. 1130 */ 1131 return; 1132 } 1133 1134 if (!silent || NoExecute(gn)) { 1135 (void) fprintf(stdout, "touch %s\n", gn->name); 1136 (void) fflush(stdout); 1137 } 1138 1139 if (NoExecute(gn)) { 1140 return; 1141 } 1142 1143 if (gn->type & OP_ARCHV) { 1144 Arch_Touch(gn); 1145 } else if (gn->type & OP_LIB) { 1146 Arch_TouchLib(gn); 1147 } else { 1148 char *file = gn->path ? gn->path : gn->name; 1149 1150 times.actime = times.modtime = now; 1151 if (utime(file, ×) < 0){ 1152 streamID = open(file, O_RDWR | O_CREAT, 0666); 1153 1154 if (streamID >= 0) { 1155 char c; 1156 1157 /* 1158 * Read and write a byte to the file to change the 1159 * modification time, then close the file. 1160 */ 1161 if (read(streamID, &c, 1) == 1) { 1162 (void) lseek(streamID, (off_t)0, SEEK_SET); 1163 (void) write(streamID, &c, 1); 1164 } 1165 1166 (void) close(streamID); 1167 } else { 1168 (void) fprintf(stdout, "*** couldn't touch %s: %s", 1169 file, strerror(errno)); 1170 (void) fflush(stdout); 1171 } 1172 } 1173 } 1174 } 1175 1176 /*- 1177 *----------------------------------------------------------------------- 1178 * Job_CheckCommands -- 1179 * Make sure the given node has all the commands it needs. 1180 * 1181 * Results: 1182 * TRUE if the commands list is/was ok. 1183 * 1184 * Side Effects: 1185 * The node will have commands from the .DEFAULT rule added to it 1186 * if it needs them. 1187 *----------------------------------------------------------------------- 1188 */ 1189 Boolean 1190 Job_CheckCommands(gn, abortProc) 1191 GNode *gn; /* The target whose commands need 1192 * verifying */ 1193 void (*abortProc) __P((char *, ...)); 1194 /* Function to abort with message */ 1195 { 1196 if (OP_NOP(gn->type) && Lst_IsEmpty(gn->commands) && 1197 (gn->type & OP_LIB) == 0) { 1198 /* 1199 * No commands. Look for .DEFAULT rule from which we might infer 1200 * commands 1201 */ 1202 if ((DEFAULT != NILGNODE) && !Lst_IsEmpty(DEFAULT->commands)) { 1203 char *p1; 1204 /* 1205 * Make only looks for a .DEFAULT if the node was never the 1206 * target of an operator, so that's what we do too. If 1207 * a .DEFAULT was given, we substitute its commands for gn's 1208 * commands and set the IMPSRC variable to be the target's name 1209 * The DEFAULT node acts like a transformation rule, in that 1210 * gn also inherits any attributes or sources attached to 1211 * .DEFAULT itself. 1212 */ 1213 Make_HandleUse(DEFAULT, gn); 1214 Var_Set(IMPSRC, Var_Value(TARGET, gn, &p1), gn, 0); 1215 if (p1) 1216 free(p1); 1217 } else if (Dir_MTime(gn) == 0) { 1218 /* 1219 * The node wasn't the target of an operator we have no .DEFAULT 1220 * rule to go on and the target doesn't already exist. There's 1221 * nothing more we can do for this branch. If the -k flag wasn't 1222 * given, we stop in our tracks, otherwise we just don't update 1223 * this node's parents so they never get examined. 1224 */ 1225 static const char msg[] = ": don't know how to make"; 1226 1227 if (gn->type & OP_OPTIONAL) { 1228 (void) fprintf(stdout, "%s%s %s(ignored)\n", progname, 1229 msg, gn->name); 1230 (void) fflush(stdout); 1231 } else if (keepgoing) { 1232 (void) fprintf(stdout, "%s%s %s(continuing)\n", progname, 1233 msg, gn->name); 1234 (void) fflush(stdout); 1235 return FALSE; 1236 } else { 1237 (*abortProc)("%s%s %s. Stop", progname, msg, gn->name); 1238 return FALSE; 1239 } 1240 } 1241 } 1242 return TRUE; 1243 } 1244 #ifdef RMT_WILL_WATCH 1245 /*- 1246 *----------------------------------------------------------------------- 1247 * JobLocalInput -- 1248 * Handle a pipe becoming readable. Callback function for Rmt_Watch 1249 * 1250 * Results: 1251 * None 1252 * 1253 * Side Effects: 1254 * JobDoOutput is called. 1255 * 1256 *----------------------------------------------------------------------- 1257 */ 1258 /*ARGSUSED*/ 1259 static void 1260 JobLocalInput(stream, job) 1261 int stream; /* Stream that's ready (ignored) */ 1262 Job *job; /* Job to which the stream belongs */ 1263 { 1264 JobDoOutput(job, FALSE); 1265 } 1266 #endif /* RMT_WILL_WATCH */ 1267 1268 /*- 1269 *----------------------------------------------------------------------- 1270 * JobExec -- 1271 * Execute the shell for the given job. Called from JobStart and 1272 * JobRestart. 1273 * 1274 * Results: 1275 * None. 1276 * 1277 * Side Effects: 1278 * A shell is executed, outputs is altered and the Job structure added 1279 * to the job table. 1280 * 1281 *----------------------------------------------------------------------- 1282 */ 1283 static void 1284 JobExec(job, argv) 1285 Job *job; /* Job to execute */ 1286 char **argv; 1287 { 1288 int cpid; /* ID of new child */ 1289 1290 job->flags &= ~JOB_TRACED; 1291 1292 if (DEBUG(JOB)) { 1293 int i; 1294 1295 (void) fprintf(stdout, "Running %s %sly\n", job->node->name, 1296 job->flags&JOB_REMOTE?"remote":"local"); 1297 (void) fprintf(stdout, "\tCommand: "); 1298 for (i = 0; argv[i] != NULL; i++) { 1299 (void) fprintf(stdout, "%s ", argv[i]); 1300 } 1301 (void) fprintf(stdout, "\n"); 1302 (void) fflush(stdout); 1303 } 1304 1305 /* 1306 * Some jobs produce no output and it's disconcerting to have 1307 * no feedback of their running (since they produce no output, the 1308 * banner with their name in it never appears). This is an attempt to 1309 * provide that feedback, even if nothing follows it. 1310 */ 1311 if ((lastNode != job->node) && (job->flags & JOB_FIRST) && 1312 !(job->flags & JOB_SILENT)) { 1313 MESSAGE(stdout, job->node); 1314 lastNode = job->node; 1315 } 1316 1317 #ifdef RMT_NO_EXEC 1318 if (job->flags & JOB_REMOTE) { 1319 goto jobExecFinish; 1320 } 1321 #endif /* RMT_NO_EXEC */ 1322 1323 if ((cpid = vfork()) == -1) { 1324 Punt("Cannot vfork: %s", strerror(errno)); 1325 } else if (cpid == 0) { 1326 1327 /* 1328 * Must duplicate the input stream down to the child's input and 1329 * reset it to the beginning (again). Since the stream was marked 1330 * close-on-exec, we must clear that bit in the new input. 1331 */ 1332 if (dup2(FILENO(job->cmdFILE), 0) == -1) 1333 Punt("Cannot dup2: %s", strerror(errno)); 1334 (void) fcntl(0, F_SETFD, 0); 1335 (void) lseek(0, (off_t)0, SEEK_SET); 1336 1337 if (job->node->type & OP_MAKE) { 1338 /* 1339 * Pass job token pipe to submakes. 1340 */ 1341 fcntl(job_pipe[0], F_SETFD, 0); 1342 fcntl(job_pipe[1], F_SETFD, 0); 1343 } 1344 1345 if (usePipes) { 1346 /* 1347 * Set up the child's output to be routed through the pipe 1348 * we've created for it. 1349 */ 1350 if (dup2(job->outPipe, 1) == -1) 1351 Punt("Cannot dup2: %s", strerror(errno)); 1352 } else { 1353 /* 1354 * We're capturing output in a file, so we duplicate the 1355 * descriptor to the temporary file into the standard 1356 * output. 1357 */ 1358 if (dup2(job->outFd, 1) == -1) 1359 Punt("Cannot dup2: %s", strerror(errno)); 1360 } 1361 /* 1362 * The output channels are marked close on exec. This bit was 1363 * duplicated by the dup2 (on some systems), so we have to clear 1364 * it before routing the shell's error output to the same place as 1365 * its standard output. 1366 */ 1367 (void) fcntl(1, F_SETFD, 0); 1368 if (dup2(1, 2) == -1) 1369 Punt("Cannot dup2: %s", strerror(errno)); 1370 1371 #ifdef USE_PGRP 1372 /* 1373 * We want to switch the child into a different process family so 1374 * we can kill it and all its descendants in one fell swoop, 1375 * by killing its process family, but not commit suicide. 1376 */ 1377 # if defined(SYSV) 1378 (void) setsid(); 1379 # else 1380 (void) setpgid(0, getpid()); 1381 # endif 1382 #endif /* USE_PGRP */ 1383 1384 #ifdef REMOTE 1385 if (job->flags & JOB_REMOTE) { 1386 Rmt_Exec(shellPath, argv, FALSE); 1387 } else 1388 #endif /* REMOTE */ 1389 { 1390 (void) execv(shellPath, argv); 1391 execError(shellPath); 1392 } 1393 _exit(1); 1394 } else { 1395 #ifdef REMOTE 1396 sigset_t nmask, omask; 1397 sigemptyset(&nmask); 1398 sigaddset(&nmask, SIGCHLD); 1399 sigprocmask(SIG_BLOCK, &nmask, &omask); 1400 #endif 1401 job->pid = cpid; 1402 1403 Trace_Log(JOBSTART, job); 1404 1405 if (usePipes && (job->flags & JOB_FIRST)) { 1406 /* 1407 * The first time a job is run for a node, we set the current 1408 * position in the buffer to the beginning and mark another 1409 * stream to watch in the outputs mask 1410 */ 1411 job->curPos = 0; 1412 1413 #ifdef RMT_WILL_WATCH 1414 Rmt_Watch(job->inPipe, JobLocalInput, job); 1415 #else 1416 #ifdef USE_SELECT 1417 FD_SET(job->inPipe, &outputs); 1418 #else 1419 watchfd(job); 1420 #endif 1421 #endif /* RMT_WILL_WATCH */ 1422 } 1423 1424 if (job->flags & JOB_REMOTE) { 1425 #ifndef REMOTE 1426 job->rmtID = 0; 1427 #else 1428 job->rmtID = Rmt_LastID(job->pid); 1429 #endif /* REMOTE */ 1430 } else { 1431 nLocal += 1; 1432 /* 1433 * XXX: Used to not happen if REMOTE. Why? 1434 */ 1435 if (job->cmdFILE != NULL && job->cmdFILE != stdout) { 1436 (void) fclose(job->cmdFILE); 1437 job->cmdFILE = NULL; 1438 } 1439 } 1440 #ifdef REMOTE 1441 sigprocmask(SIG_SETMASK, &omask, NULL); 1442 #endif 1443 } 1444 1445 #ifdef RMT_NO_EXEC 1446 jobExecFinish: 1447 #endif 1448 /* 1449 * Now the job is actually running, add it to the table. 1450 */ 1451 nJobs += 1; 1452 (void) Lst_AtEnd(jobs, (ClientData)job); 1453 } 1454 1455 /*- 1456 *----------------------------------------------------------------------- 1457 * JobMakeArgv -- 1458 * Create the argv needed to execute the shell for a given job. 1459 * 1460 * 1461 * Results: 1462 * 1463 * Side Effects: 1464 * 1465 *----------------------------------------------------------------------- 1466 */ 1467 static void 1468 JobMakeArgv(job, argv) 1469 Job *job; 1470 char **argv; 1471 { 1472 int argc; 1473 static char args[10]; /* For merged arguments */ 1474 1475 argv[0] = shellName; 1476 argc = 1; 1477 1478 if ((commandShell->exit && (*commandShell->exit != '-')) || 1479 (commandShell->echo && (*commandShell->echo != '-'))) 1480 { 1481 /* 1482 * At least one of the flags doesn't have a minus before it, so 1483 * merge them together. Have to do this because the *(&(@*#*&#$# 1484 * Bourne shell thinks its second argument is a file to source. 1485 * Grrrr. Note the ten-character limitation on the combined arguments. 1486 */ 1487 (void)snprintf(args, sizeof(args), "-%s%s", 1488 ((job->flags & JOB_IGNERR) ? "" : 1489 (commandShell->exit ? commandShell->exit : "")), 1490 ((job->flags & JOB_SILENT) ? "" : 1491 (commandShell->echo ? commandShell->echo : ""))); 1492 1493 if (args[1]) { 1494 argv[argc] = args; 1495 argc++; 1496 } 1497 } else { 1498 if (!(job->flags & JOB_IGNERR) && commandShell->exit) { 1499 argv[argc] = commandShell->exit; 1500 argc++; 1501 } 1502 if (!(job->flags & JOB_SILENT) && commandShell->echo) { 1503 argv[argc] = commandShell->echo; 1504 argc++; 1505 } 1506 } 1507 argv[argc] = NULL; 1508 } 1509 1510 /*- 1511 *----------------------------------------------------------------------- 1512 * JobRestart -- 1513 * Restart a job that stopped for some reason. 1514 * 1515 * Results: 1516 * 1 if max number of running jobs has been reached, 0 otherwise. 1517 * 1518 *----------------------------------------------------------------------- 1519 */ 1520 static int 1521 JobRestart(job) 1522 Job *job; /* Job to restart */ 1523 { 1524 #ifdef REMOTE 1525 int host; 1526 #endif 1527 1528 if (job->flags & JOB_REMIGRATE) { 1529 if ( 1530 #ifdef REMOTE 1531 verboseRemigrates || 1532 #endif 1533 DEBUG(JOB)) { 1534 (void) fprintf(stdout, "*** remigrating %x(%s)\n", 1535 job->pid, job->node->name); 1536 (void) fflush(stdout); 1537 } 1538 1539 #ifdef REMOTE 1540 if (!Rmt_ReExport(job->pid, job->node, &host)) { 1541 if (verboseRemigrates || DEBUG(JOB)) { 1542 (void) fprintf(stdout, "*** couldn't migrate...\n"); 1543 (void) fflush(stdout); 1544 } 1545 #endif 1546 if (nLocal != maxLocal) { 1547 /* 1548 * Job cannot be remigrated, but there's room on the local 1549 * machine, so resume the job and note that another 1550 * local job has started. 1551 */ 1552 if ( 1553 #ifdef REMOTE 1554 verboseRemigrates || 1555 #endif 1556 DEBUG(JOB)) { 1557 (void) fprintf(stdout, "*** resuming on local machine\n"); 1558 (void) fflush(stdout); 1559 } 1560 KILL(job->pid, SIGCONT); 1561 nLocal +=1; 1562 #ifdef REMOTE 1563 job->flags &= ~(JOB_REMIGRATE|JOB_RESUME|JOB_REMOTE); 1564 job->flags |= JOB_CONTINUING; 1565 #else 1566 job->flags &= ~(JOB_REMIGRATE|JOB_RESUME); 1567 #endif 1568 } else { 1569 /* 1570 * Job cannot be restarted. Mark the table as full and 1571 * place the job back on the list of stopped jobs. 1572 */ 1573 if ( 1574 #ifdef REMOTE 1575 verboseRemigrates || 1576 #endif 1577 DEBUG(JOB)) { 1578 (void) fprintf(stdout, "*** holding\n"); 1579 (void) fflush(stdout); 1580 } 1581 (void)Lst_AtFront(stoppedJobs, (ClientData)job); 1582 return 1; 1583 } 1584 #ifdef REMOTE 1585 } else { 1586 /* 1587 * Clear out the remigrate and resume flags. Set the continuing 1588 * flag so we know later on that the process isn't exiting just 1589 * because of a signal. 1590 */ 1591 job->flags &= ~(JOB_REMIGRATE|JOB_RESUME); 1592 job->flags |= JOB_CONTINUING; 1593 job->rmtID = host; 1594 } 1595 #endif 1596 1597 (void)Lst_AtEnd(jobs, (ClientData)job); 1598 nJobs += 1; 1599 } else if (job->flags & JOB_RESTART) { 1600 /* 1601 * Set up the control arguments to the shell. This is based on the 1602 * flags set earlier for this job. If the JOB_IGNERR flag is clear, 1603 * the 'exit' flag of the commandShell is used to cause it to exit 1604 * upon receiving an error. If the JOB_SILENT flag is clear, the 1605 * 'echo' flag of the commandShell is used to get it to start echoing 1606 * as soon as it starts processing commands. 1607 */ 1608 char *argv[10]; 1609 1610 JobMakeArgv(job, argv); 1611 1612 if (DEBUG(JOB)) { 1613 (void) fprintf(stdout, "Restarting %s...", job->node->name); 1614 (void) fflush(stdout); 1615 } 1616 #ifdef REMOTE 1617 if ((job->node->type&OP_NOEXPORT) || 1618 (nLocal < maxLocal && runLocalFirst) 1619 # ifdef RMT_NO_EXEC 1620 || !Rmt_Export(shellPath, argv, job) 1621 # else 1622 || !Rmt_Begin(shellPath, argv, job->node) 1623 # endif 1624 #endif 1625 { 1626 if (((nLocal >= maxLocal) && !(job->flags & JOB_SPECIAL))) { 1627 /* 1628 * Can't be exported and not allowed to run locally -- put it 1629 * back on the hold queue and mark the table full 1630 */ 1631 if (DEBUG(JOB)) { 1632 (void) fprintf(stdout, "holding\n"); 1633 (void) fflush(stdout); 1634 } 1635 (void)Lst_AtFront(stoppedJobs, (ClientData)job); 1636 return 1; 1637 } else { 1638 /* 1639 * Job may be run locally. 1640 */ 1641 if (DEBUG(JOB)) { 1642 (void) fprintf(stdout, "running locally\n"); 1643 (void) fflush(stdout); 1644 } 1645 job->flags &= ~JOB_REMOTE; 1646 } 1647 } 1648 #ifdef REMOTE 1649 else { 1650 /* 1651 * Can be exported. Hooray! 1652 */ 1653 if (DEBUG(JOB)) { 1654 (void) fprintf(stdout, "exporting\n"); 1655 (void) fflush(stdout); 1656 } 1657 job->flags |= JOB_REMOTE; 1658 } 1659 #endif 1660 JobExec(job, argv); 1661 } else { 1662 /* 1663 * The job has stopped and needs to be restarted. Why it stopped, 1664 * we don't know... 1665 */ 1666 if (DEBUG(JOB)) { 1667 (void) fprintf(stdout, "Resuming %s...", job->node->name); 1668 (void) fflush(stdout); 1669 } 1670 if (((job->flags & JOB_REMOTE) || 1671 (nLocal < maxLocal) || 1672 #ifdef REMOTE 1673 (((job->flags & JOB_SPECIAL) && 1674 (job->node->type & OP_NOEXPORT)) && 1675 (maxLocal == 0))) && 1676 #else 1677 ((job->flags & JOB_SPECIAL) && 1678 (maxLocal == 0))) && 1679 #endif 1680 (nJobs != maxJobs)) 1681 { 1682 /* 1683 * If the job is remote, it's ok to resume it as long as the 1684 * maximum concurrency won't be exceeded. If it's local and 1685 * we haven't reached the local concurrency limit already (or the 1686 * job must be run locally and maxLocal is 0), it's also ok to 1687 * resume it. 1688 */ 1689 Boolean error; 1690 int status; 1691 1692 #ifdef RMT_WANTS_SIGNALS 1693 if (job->flags & JOB_REMOTE) { 1694 error = !Rmt_Signal(job, SIGCONT); 1695 } else 1696 #endif /* RMT_WANTS_SIGNALS */ 1697 error = (KILL(job->pid, SIGCONT) != 0); 1698 1699 if (!error) { 1700 /* 1701 * Make sure the user knows we've continued the beast and 1702 * actually put the thing in the job table. 1703 */ 1704 job->flags |= JOB_CONTINUING; 1705 status = W_STOPCODE(SIGCONT); 1706 JobFinish(job, &status); 1707 1708 job->flags &= ~(JOB_RESUME|JOB_CONTINUING); 1709 if (DEBUG(JOB)) { 1710 (void) fprintf(stdout, "done\n"); 1711 (void) fflush(stdout); 1712 } 1713 } else { 1714 Error("couldn't resume %s: %s", 1715 job->node->name, strerror(errno)); 1716 status = W_EXITCODE(1, 0); 1717 JobFinish(job, &status); 1718 } 1719 } else { 1720 /* 1721 * Job cannot be restarted. Mark the table as full and 1722 * place the job back on the list of stopped jobs. 1723 */ 1724 if (DEBUG(JOB)) { 1725 (void) fprintf(stdout, "table full\n"); 1726 (void) fflush(stdout); 1727 } 1728 (void) Lst_AtFront(stoppedJobs, (ClientData)job); 1729 return 1; 1730 } 1731 } 1732 return 0; 1733 } 1734 1735 /*- 1736 *----------------------------------------------------------------------- 1737 * JobStart -- 1738 * Start a target-creation process going for the target described 1739 * by the graph node gn. 1740 * 1741 * Results: 1742 * JOB_ERROR if there was an error in the commands, JOB_FINISHED 1743 * if there isn't actually anything left to do for the job and 1744 * JOB_RUNNING if the job has been started. 1745 * 1746 * Side Effects: 1747 * A new Job node is created and added to the list of running 1748 * jobs. PMake is forked and a child shell created. 1749 *----------------------------------------------------------------------- 1750 */ 1751 static int 1752 JobStart(gn, flags, previous) 1753 GNode *gn; /* target to create */ 1754 int flags; /* flags for the job to override normal ones. 1755 * e.g. JOB_SPECIAL or JOB_IGNDOTS */ 1756 Job *previous; /* The previous Job structure for this node, 1757 * if any. */ 1758 { 1759 register Job *job; /* new job descriptor */ 1760 char *argv[10]; /* Argument vector to shell */ 1761 Boolean cmdsOK; /* true if the nodes commands were all right */ 1762 Boolean local; /* Set true if the job was run locally */ 1763 Boolean noExec; /* Set true if we decide not to run the job */ 1764 int tfd; /* File descriptor to the temp file */ 1765 1766 if (previous != NULL) { 1767 previous->flags &= ~(JOB_FIRST|JOB_IGNERR|JOB_SILENT|JOB_REMOTE); 1768 job = previous; 1769 } else { 1770 job = (Job *) emalloc(sizeof(Job)); 1771 if (job == NULL) { 1772 Punt("JobStart out of memory"); 1773 } 1774 flags |= JOB_FIRST; 1775 } 1776 1777 job->node = gn; 1778 job->tailCmds = NILLNODE; 1779 1780 /* 1781 * Set the initial value of the flags for this job based on the global 1782 * ones and the node's attributes... Any flags supplied by the caller 1783 * are also added to the field. 1784 */ 1785 job->flags = 0; 1786 if (Targ_Ignore(gn)) { 1787 job->flags |= JOB_IGNERR; 1788 } 1789 if (Targ_Silent(gn)) { 1790 job->flags |= JOB_SILENT; 1791 } 1792 job->flags |= flags; 1793 1794 /* 1795 * Check the commands now so any attributes from .DEFAULT have a chance 1796 * to migrate to the node 1797 */ 1798 if (!compatMake && job->flags & JOB_FIRST) { 1799 cmdsOK = Job_CheckCommands(gn, Error); 1800 } else { 1801 cmdsOK = TRUE; 1802 } 1803 1804 #ifndef RMT_WILL_WATCH 1805 #ifndef USE_SELECT 1806 job->inPollfd = NULL; 1807 #endif 1808 #endif 1809 /* 1810 * If the -n flag wasn't given, we open up OUR (not the child's) 1811 * temporary file to stuff commands in it. The thing is rd/wr so we don't 1812 * need to reopen it to feed it to the shell. If the -n flag *was* given, 1813 * we just set the file to be stdout. Cute, huh? 1814 */ 1815 if (((gn->type & OP_MAKE) && !(noRecursiveExecute)) || 1816 (!noExecute && !touchFlag)) { 1817 /* 1818 * tfile is the name of a file into which all shell commands are 1819 * put. It is used over by removing it before the child shell is 1820 * executed. The XXXXXX in the string are replaced by the pid of 1821 * the make process in a 6-character field with leading zeroes. 1822 */ 1823 char tfile[sizeof(TMPPAT)]; 1824 /* 1825 * We're serious here, but if the commands were bogus, we're 1826 * also dead... 1827 */ 1828 if (!cmdsOK) { 1829 DieHorribly(); 1830 } 1831 1832 (void)strcpy(tfile, TMPPAT); 1833 if ((tfd = mkstemp(tfile)) == -1) 1834 Punt("Could not create temporary file %s", strerror(errno)); 1835 (void) eunlink(tfile); 1836 1837 job->cmdFILE = fdopen(tfd, "w+"); 1838 if (job->cmdFILE == NULL) { 1839 Punt("Could not fdopen %s", tfile); 1840 } 1841 (void) fcntl(FILENO(job->cmdFILE), F_SETFD, 1); 1842 /* 1843 * Send the commands to the command file, flush all its buffers then 1844 * rewind and remove the thing. 1845 */ 1846 noExec = FALSE; 1847 1848 /* 1849 * used to be backwards; replace when start doing multiple commands 1850 * per shell. 1851 */ 1852 if (compatMake) { 1853 /* 1854 * Be compatible: If this is the first time for this node, 1855 * verify its commands are ok and open the commands list for 1856 * sequential access by later invocations of JobStart. 1857 * Once that is done, we take the next command off the list 1858 * and print it to the command file. If the command was an 1859 * ellipsis, note that there's nothing more to execute. 1860 */ 1861 if ((job->flags&JOB_FIRST) && (Lst_Open(gn->commands) != SUCCESS)){ 1862 cmdsOK = FALSE; 1863 } else { 1864 LstNode ln = Lst_Next(gn->commands); 1865 1866 if ((ln == NILLNODE) || 1867 JobPrintCommand((ClientData) Lst_Datum(ln), 1868 (ClientData) job)) 1869 { 1870 noExec = TRUE; 1871 Lst_Close(gn->commands); 1872 } 1873 if (noExec && !(job->flags & JOB_FIRST)) { 1874 /* 1875 * If we're not going to execute anything, the job 1876 * is done and we need to close down the various 1877 * file descriptors we've opened for output, then 1878 * call JobDoOutput to catch the final characters or 1879 * send the file to the screen... Note that the i/o streams 1880 * are only open if this isn't the first job. 1881 * Note also that this could not be done in 1882 * Job_CatchChildren b/c it wasn't clear if there were 1883 * more commands to execute or not... 1884 */ 1885 JobClose(job); 1886 } 1887 } 1888 } else { 1889 /* 1890 * We can do all the commands at once. hooray for sanity 1891 */ 1892 numCommands = 0; 1893 Lst_ForEach(gn->commands, JobPrintCommand, (ClientData)job); 1894 1895 /* 1896 * If we didn't print out any commands to the shell script, 1897 * there's not much point in executing the shell, is there? 1898 */ 1899 if (numCommands == 0) { 1900 noExec = TRUE; 1901 } 1902 } 1903 } else if (NoExecute(gn)) { 1904 /* 1905 * Not executing anything -- just print all the commands to stdout 1906 * in one fell swoop. This will still set up job->tailCmds correctly. 1907 */ 1908 if (lastNode != gn) { 1909 MESSAGE(stdout, gn); 1910 lastNode = gn; 1911 } 1912 job->cmdFILE = stdout; 1913 /* 1914 * Only print the commands if they're ok, but don't die if they're 1915 * not -- just let the user know they're bad and keep going. It 1916 * doesn't do any harm in this case and may do some good. 1917 */ 1918 if (cmdsOK) { 1919 Lst_ForEach(gn->commands, JobPrintCommand, (ClientData)job); 1920 } 1921 /* 1922 * Don't execute the shell, thank you. 1923 */ 1924 noExec = TRUE; 1925 } else { 1926 /* 1927 * Just touch the target and note that no shell should be executed. 1928 * Set cmdFILE to stdout to make life easier. Check the commands, too, 1929 * but don't die if they're no good -- it does no harm to keep working 1930 * up the graph. 1931 */ 1932 job->cmdFILE = stdout; 1933 Job_Touch(gn, job->flags&JOB_SILENT); 1934 noExec = TRUE; 1935 } 1936 1937 /* 1938 * If we're not supposed to execute a shell, don't. 1939 */ 1940 if (noExec) { 1941 /* 1942 * Unlink and close the command file if we opened one 1943 */ 1944 if (job->cmdFILE != stdout) { 1945 if (job->cmdFILE != NULL) { 1946 (void) fclose(job->cmdFILE); 1947 job->cmdFILE = NULL; 1948 } 1949 } else { 1950 (void) fflush(stdout); 1951 } 1952 1953 /* 1954 * We only want to work our way up the graph if we aren't here because 1955 * the commands for the job were no good. 1956 */ 1957 if (cmdsOK) { 1958 if (aborting == 0) { 1959 if (job->tailCmds != NILLNODE) { 1960 Lst_ForEachFrom(job->node->commands, job->tailCmds, 1961 JobSaveCommand, 1962 (ClientData)job->node); 1963 } 1964 if (!(job->flags & JOB_SPECIAL)) 1965 Job_TokenReturn(); 1966 job->node->made = MADE; 1967 Make_Update(job->node); 1968 } 1969 free((Address)job); 1970 return(JOB_FINISHED); 1971 } else { 1972 free((Address)job); 1973 return(JOB_ERROR); 1974 } 1975 } else { 1976 (void) fflush(job->cmdFILE); 1977 } 1978 1979 /* 1980 * Set up the control arguments to the shell. This is based on the flags 1981 * set earlier for this job. 1982 */ 1983 JobMakeArgv(job, argv); 1984 1985 /* 1986 * If we're using pipes to catch output, create the pipe by which we'll 1987 * get the shell's output. If we're using files, print out that we're 1988 * starting a job and then set up its temporary-file name. 1989 */ 1990 if (!compatMake || (job->flags & JOB_FIRST)) { 1991 if (usePipes) { 1992 int fd[2]; 1993 if (pipe(fd) == -1) 1994 Punt("Cannot create pipe: %s", strerror(errno)); 1995 job->inPipe = fd[0]; 1996 #ifdef USE_SELECT 1997 if (job->inPipe >= FD_SETSIZE) 1998 Punt("Ran out of fd_set slots; " 1999 "recompile with a larger FD_SETSIZE."); 2000 #endif 2001 job->outPipe = fd[1]; 2002 (void) fcntl(job->inPipe, F_SETFD, 1); 2003 (void) fcntl(job->outPipe, F_SETFD, 1); 2004 } else { 2005 (void) fprintf(stdout, "Remaking `%s'\n", gn->name); 2006 (void) fflush(stdout); 2007 (void) strcpy(job->outFile, TMPPAT); 2008 job->outFd = mkstemp(job->outFile); 2009 (void) fcntl(job->outFd, F_SETFD, 1); 2010 } 2011 } 2012 2013 #ifdef REMOTE 2014 if (!(gn->type & OP_NOEXPORT) && !(runLocalFirst && nLocal < maxLocal)) { 2015 #ifdef RMT_NO_EXEC 2016 local = !Rmt_Export(shellPath, argv, job); 2017 #else 2018 local = !Rmt_Begin(shellPath, argv, job->node); 2019 #endif /* RMT_NO_EXEC */ 2020 if (!local) { 2021 job->flags |= JOB_REMOTE; 2022 } 2023 } else 2024 #endif 2025 local = TRUE; 2026 2027 if (local && (((nLocal >= maxLocal) && 2028 !(job->flags & JOB_SPECIAL) && 2029 #ifdef REMOTE 2030 (!(gn->type & OP_NOEXPORT) || (maxLocal != 0)) 2031 #else 2032 (maxLocal != 0) 2033 #endif 2034 ))) 2035 { 2036 /* 2037 * The job can only be run locally, but we've hit the limit of 2038 * local concurrency, so put the job on hold until some other job 2039 * finishes. Note that the special jobs (.BEGIN, .INTERRUPT and .END) 2040 * may be run locally even when the local limit has been reached 2041 * (e.g. when maxLocal == 0), though they will be exported if at 2042 * all possible. In addition, any target marked with .NOEXPORT will 2043 * be run locally if maxLocal is 0. 2044 */ 2045 job->flags |= JOB_RESTART; 2046 (void) Lst_AtEnd(stoppedJobs, (ClientData)job); 2047 } else { 2048 JobExec(job, argv); 2049 } 2050 return(JOB_RUNNING); 2051 } 2052 2053 static char * 2054 JobOutput(job, cp, endp, msg) 2055 register Job *job; 2056 register char *cp, *endp; 2057 int msg; 2058 { 2059 register char *ecp; 2060 2061 if (commandShell->noPrint) { 2062 ecp = Str_FindSubstring(cp, commandShell->noPrint); 2063 while (ecp != NULL) { 2064 if (cp != ecp) { 2065 *ecp = '\0'; 2066 if (msg && job->node != lastNode) { 2067 MESSAGE(stdout, job->node); 2068 lastNode = job->node; 2069 } 2070 /* 2071 * The only way there wouldn't be a newline after 2072 * this line is if it were the last in the buffer. 2073 * however, since the non-printable comes after it, 2074 * there must be a newline, so we don't print one. 2075 */ 2076 (void) fprintf(stdout, "%s", cp); 2077 (void) fflush(stdout); 2078 } 2079 cp = ecp + commandShell->noPLen; 2080 if (cp != endp) { 2081 /* 2082 * Still more to print, look again after skipping 2083 * the whitespace following the non-printable 2084 * command.... 2085 */ 2086 cp++; 2087 while (*cp == ' ' || *cp == '\t' || *cp == '\n') { 2088 cp++; 2089 } 2090 ecp = Str_FindSubstring(cp, commandShell->noPrint); 2091 } else { 2092 return cp; 2093 } 2094 } 2095 } 2096 return cp; 2097 } 2098 2099 /*- 2100 *----------------------------------------------------------------------- 2101 * JobDoOutput -- 2102 * This function is called at different times depending on 2103 * whether the user has specified that output is to be collected 2104 * via pipes or temporary files. In the former case, we are called 2105 * whenever there is something to read on the pipe. We collect more 2106 * output from the given job and store it in the job's outBuf. If 2107 * this makes up a line, we print it tagged by the job's identifier, 2108 * as necessary. 2109 * If output has been collected in a temporary file, we open the 2110 * file and read it line by line, transfering it to our own 2111 * output channel until the file is empty. At which point we 2112 * remove the temporary file. 2113 * In both cases, however, we keep our figurative eye out for the 2114 * 'noPrint' line for the shell from which the output came. If 2115 * we recognize a line, we don't print it. If the command is not 2116 * alone on the line (the character after it is not \0 or \n), we 2117 * do print whatever follows it. 2118 * 2119 * Results: 2120 * None 2121 * 2122 * Side Effects: 2123 * curPos may be shifted as may the contents of outBuf. 2124 *----------------------------------------------------------------------- 2125 */ 2126 STATIC void 2127 JobDoOutput(job, finish) 2128 register Job *job; /* the job whose output needs printing */ 2129 Boolean finish; /* TRUE if this is the last time we'll be 2130 * called for this job */ 2131 { 2132 Boolean gotNL = FALSE; /* true if got a newline */ 2133 Boolean fbuf; /* true if our buffer filled up */ 2134 register int nr; /* number of bytes read */ 2135 register int i; /* auxiliary index into outBuf */ 2136 register int max; /* limit for i (end of current data) */ 2137 int nRead; /* (Temporary) number of bytes read */ 2138 2139 FILE *oFILE; /* Stream pointer to shell's output file */ 2140 char inLine[132]; 2141 2142 2143 if (usePipes) { 2144 /* 2145 * Read as many bytes as will fit in the buffer. 2146 */ 2147 end_loop: 2148 gotNL = FALSE; 2149 fbuf = FALSE; 2150 2151 nRead = read(job->inPipe, &job->outBuf[job->curPos], 2152 JOB_BUFSIZE - job->curPos); 2153 if (nRead < 0) { 2154 if (DEBUG(JOB)) { 2155 perror("JobDoOutput(piperead)"); 2156 } 2157 nr = 0; 2158 } else { 2159 nr = nRead; 2160 } 2161 2162 /* 2163 * If we hit the end-of-file (the job is dead), we must flush its 2164 * remaining output, so pretend we read a newline if there's any 2165 * output remaining in the buffer. 2166 * Also clear the 'finish' flag so we stop looping. 2167 */ 2168 if ((nr == 0) && (job->curPos != 0)) { 2169 job->outBuf[job->curPos] = '\n'; 2170 nr = 1; 2171 finish = FALSE; 2172 } else if (nr == 0) { 2173 finish = FALSE; 2174 } 2175 2176 /* 2177 * Look for the last newline in the bytes we just got. If there is 2178 * one, break out of the loop with 'i' as its index and gotNL set 2179 * TRUE. 2180 */ 2181 max = job->curPos + nr; 2182 for (i = job->curPos + nr - 1; i >= job->curPos; i--) { 2183 if (job->outBuf[i] == '\n') { 2184 gotNL = TRUE; 2185 break; 2186 } else if (job->outBuf[i] == '\0') { 2187 /* 2188 * Why? 2189 */ 2190 job->outBuf[i] = ' '; 2191 } 2192 } 2193 2194 if (!gotNL) { 2195 job->curPos += nr; 2196 if (job->curPos == JOB_BUFSIZE) { 2197 /* 2198 * If we've run out of buffer space, we have no choice 2199 * but to print the stuff. sigh. 2200 */ 2201 fbuf = TRUE; 2202 i = job->curPos; 2203 } 2204 } 2205 if (gotNL || fbuf) { 2206 /* 2207 * Need to send the output to the screen. Null terminate it 2208 * first, overwriting the newline character if there was one. 2209 * So long as the line isn't one we should filter (according 2210 * to the shell description), we print the line, preceded 2211 * by a target banner if this target isn't the same as the 2212 * one for which we last printed something. 2213 * The rest of the data in the buffer are then shifted down 2214 * to the start of the buffer and curPos is set accordingly. 2215 */ 2216 job->outBuf[i] = '\0'; 2217 if (i >= job->curPos) { 2218 char *cp; 2219 2220 cp = JobOutput(job, job->outBuf, &job->outBuf[i], FALSE); 2221 2222 /* 2223 * There's still more in that thar buffer. This time, though, 2224 * we know there's no newline at the end, so we add one of 2225 * our own free will. 2226 */ 2227 if (*cp != '\0') { 2228 if (job->node != lastNode) { 2229 MESSAGE(stdout, job->node); 2230 lastNode = job->node; 2231 } 2232 (void) fprintf(stdout, "%s%s", cp, gotNL ? "\n" : ""); 2233 (void) fflush(stdout); 2234 } 2235 } 2236 if (i < max - 1) { 2237 /* shift the remaining characters down */ 2238 (void) memcpy(job->outBuf, &job->outBuf[i + 1], max - (i + 1)); 2239 job->curPos = max - (i + 1); 2240 2241 } else { 2242 /* 2243 * We have written everything out, so we just start over 2244 * from the start of the buffer. No copying. No nothing. 2245 */ 2246 job->curPos = 0; 2247 } 2248 } 2249 if (finish) { 2250 /* 2251 * If the finish flag is true, we must loop until we hit 2252 * end-of-file on the pipe. This is guaranteed to happen 2253 * eventually since the other end of the pipe is now closed 2254 * (we closed it explicitly and the child has exited). When 2255 * we do get an EOF, finish will be set FALSE and we'll fall 2256 * through and out. 2257 */ 2258 goto end_loop; 2259 } 2260 } else { 2261 /* 2262 * We've been called to retrieve the output of the job from the 2263 * temporary file where it's been squirreled away. This consists of 2264 * opening the file, reading the output line by line, being sure not 2265 * to print the noPrint line for the shell we used, then close and 2266 * remove the temporary file. Very simple. 2267 * 2268 * Change to read in blocks and do FindSubString type things as for 2269 * pipes? That would allow for "@echo -n..." 2270 */ 2271 oFILE = fopen(job->outFile, "r"); 2272 if (oFILE != NULL) { 2273 (void) fprintf(stdout, "Results of making %s:\n", job->node->name); 2274 (void) fflush(stdout); 2275 while (fgets(inLine, sizeof(inLine), oFILE) != NULL) { 2276 register char *cp, *endp, *oendp; 2277 2278 cp = inLine; 2279 oendp = endp = inLine + strlen(inLine); 2280 if (endp[-1] == '\n') { 2281 *--endp = '\0'; 2282 } 2283 cp = JobOutput(job, inLine, endp, FALSE); 2284 2285 /* 2286 * There's still more in that thar buffer. This time, though, 2287 * we know there's no newline at the end, so we add one of 2288 * our own free will. 2289 */ 2290 (void) fprintf(stdout, "%s", cp); 2291 (void) fflush(stdout); 2292 if (endp != oendp) { 2293 (void) fprintf(stdout, "\n"); 2294 (void) fflush(stdout); 2295 } 2296 } 2297 (void) fclose(oFILE); 2298 (void) eunlink(job->outFile); 2299 } else { 2300 Punt("Cannot open `%s'", job->outFile); 2301 } 2302 } 2303 } 2304 2305 /*- 2306 *----------------------------------------------------------------------- 2307 * Job_CatchChildren -- 2308 * Handle the exit of a child. Called from Make_Make. 2309 * 2310 * Results: 2311 * none. 2312 * 2313 * Side Effects: 2314 * The job descriptor is removed from the list of children. 2315 * 2316 * Notes: 2317 * We do waits, blocking or not, according to the wisdom of our 2318 * caller, until there are no more children to report. For each 2319 * job, call JobFinish to finish things off. This will take care of 2320 * putting jobs on the stoppedJobs queue. 2321 * 2322 *----------------------------------------------------------------------- 2323 */ 2324 void 2325 Job_CatchChildren(block) 2326 Boolean block; /* TRUE if should block on the wait. */ 2327 { 2328 int pid; /* pid of dead child */ 2329 register Job *job; /* job descriptor for dead child */ 2330 LstNode jnode; /* list element for finding job */ 2331 int status; /* Exit/termination status */ 2332 2333 /* 2334 * Don't even bother if we know there's no one around. 2335 */ 2336 if (nLocal == 0) { 2337 return; 2338 } 2339 2340 while ((pid = waitpid((pid_t) -1, &status, 2341 (block?0:WNOHANG)|WUNTRACED)) > 0) 2342 { 2343 if (DEBUG(JOB)) { 2344 (void) fprintf(stdout, "Process %d exited or stopped %x.\n", pid, 2345 status); 2346 (void) fflush(stdout); 2347 } 2348 2349 2350 jnode = Lst_Find(jobs, (ClientData)&pid, JobCmpPid); 2351 2352 if (jnode == NILLNODE) { 2353 if (WIFSTOPPED(status) && (WSTOPSIG(status) == SIGCONT)) { 2354 jnode = Lst_Find(stoppedJobs, (ClientData) &pid, JobCmpPid); 2355 if (jnode == NILLNODE) { 2356 Error("Resumed child (%d) not in table", pid); 2357 continue; 2358 } 2359 job = (Job *)Lst_Datum(jnode); 2360 (void) Lst_Remove(stoppedJobs, jnode); 2361 } else { 2362 Error("Child (%d) not in table?", pid); 2363 continue; 2364 } 2365 } else { 2366 job = (Job *) Lst_Datum(jnode); 2367 (void) Lst_Remove(jobs, jnode); 2368 nJobs -= 1; 2369 #ifdef REMOTE 2370 if (!(job->flags & JOB_REMOTE)) { 2371 if (DEBUG(JOB)) { 2372 (void) fprintf(stdout, 2373 "Job queue has one fewer local process.\n"); 2374 (void) fflush(stdout); 2375 } 2376 nLocal -= 1; 2377 } 2378 #else 2379 nLocal -= 1; 2380 #endif 2381 } 2382 2383 JobFinish(job, &status); 2384 } 2385 } 2386 2387 /*- 2388 *----------------------------------------------------------------------- 2389 * Job_CatchOutput -- 2390 * Catch the output from our children, if we're using 2391 * pipes do so. Otherwise just block time until we get a 2392 * signal (most likely a SIGCHLD) since there's no point in 2393 * just spinning when there's nothing to do and the reaping 2394 * of a child can wait for a while. 2395 * 2396 * Results: 2397 * None 2398 * 2399 * Side Effects: 2400 * Output is read from pipes if we're piping. 2401 * ----------------------------------------------------------------------- 2402 */ 2403 void 2404 Job_CatchOutput() 2405 { 2406 int nready; 2407 register LstNode ln; 2408 register Job *job; 2409 #ifdef RMT_WILL_WATCH 2410 int pnJobs; /* Previous nJobs */ 2411 #endif 2412 2413 (void) fflush(stdout); 2414 Job_TokenFlush(); 2415 #ifdef RMT_WILL_WATCH 2416 pnJobs = nJobs; 2417 2418 /* 2419 * It is possible for us to be called with nJobs equal to 0. This happens 2420 * if all the jobs finish and a job that is stopped cannot be run 2421 * locally (eg if maxLocal is 0) and cannot be exported. The job will 2422 * be placed back on the stoppedJobs queue, Job_Empty() will return false, 2423 * Make_Run will call us again when there's nothing for which to wait. 2424 * nJobs never changes, so we loop forever. Hence the check. It could 2425 * be argued that we should sleep for a bit so as not to swamp the 2426 * exportation system with requests. Perhaps we should. 2427 * 2428 * NOTE: IT IS THE RESPONSIBILITY OF Rmt_Wait TO CALL Job_CatchChildren 2429 * IN A TIMELY FASHION TO CATCH ANY LOCALLY RUNNING JOBS THAT EXIT. 2430 * It may use the variable nLocal to determine if it needs to call 2431 * Job_CatchChildren (if nLocal is 0, there's nothing for which to 2432 * wait...) 2433 */ 2434 while (nJobs != 0 && pnJobs == nJobs) { 2435 Rmt_Wait(); 2436 } 2437 #else 2438 if (usePipes) { 2439 #ifdef USE_SELECT 2440 struct timeval timeout; 2441 fd_set readfds; 2442 2443 readfds = outputs; 2444 timeout.tv_sec = SEL_SEC; 2445 timeout.tv_usec = SEL_USEC; 2446 2447 if ((nready = select(FD_SETSIZE, &readfds, (fd_set *) 0, 2448 (fd_set *) 0, &timeout)) <= 0) 2449 return; 2450 #else 2451 if ((nready = poll((wantToken ? fds : (fds + 1)), 2452 (wantToken ? nfds : (nfds - 1)), POLL_MSEC)) <= 0) 2453 return; 2454 #endif 2455 else { 2456 if (Lst_Open(jobs) == FAILURE) { 2457 Punt("Cannot open job table"); 2458 } 2459 while (nready && (ln = Lst_Next(jobs)) != NILLNODE) { 2460 job = (Job *) Lst_Datum(ln); 2461 #ifdef USE_SELECT 2462 if (FD_ISSET(job->inPipe, &readfds)) 2463 #else 2464 if (readyfd(job)) 2465 #endif 2466 { 2467 JobDoOutput(job, FALSE); 2468 nready -= 1; 2469 } 2470 2471 } 2472 Lst_Close(jobs); 2473 } 2474 } 2475 #endif /* RMT_WILL_WATCH */ 2476 } 2477 2478 /*- 2479 *----------------------------------------------------------------------- 2480 * Job_Make -- 2481 * Start the creation of a target. Basically a front-end for 2482 * JobStart used by the Make module. 2483 * 2484 * Results: 2485 * None. 2486 * 2487 * Side Effects: 2488 * Another job is started. 2489 * 2490 *----------------------------------------------------------------------- 2491 */ 2492 void 2493 Job_Make(gn) 2494 GNode *gn; 2495 { 2496 (void) JobStart(gn, 0, NULL); 2497 } 2498 2499 /*- 2500 *----------------------------------------------------------------------- 2501 * Job_Init -- 2502 * Initialize the process module 2503 * 2504 * Results: 2505 * none 2506 * 2507 * Side Effects: 2508 * lists and counters are initialized 2509 *----------------------------------------------------------------------- 2510 */ 2511 void 2512 Job_Init(maxproc, maxlocal) 2513 int maxproc; /* the greatest number of jobs which may be 2514 * running at one time */ 2515 int maxlocal; /* the greatest number of local jobs which may 2516 * be running at once. */ 2517 { 2518 GNode *begin; /* node for commands to do at the very start */ 2519 2520 jobs = Lst_Init(FALSE); 2521 stoppedJobs = Lst_Init(FALSE); 2522 maxJobs = maxproc; 2523 maxLocal = maxlocal; 2524 nJobs = 0; 2525 nLocal = 0; 2526 wantToken = FALSE; 2527 2528 aborting = 0; 2529 errors = 0; 2530 2531 lastNode = NILGNODE; 2532 2533 if (maxJobs == 1 2534 #ifdef REMOTE 2535 || noMessages 2536 #endif 2537 ) { 2538 /* 2539 * If only one job can run at a time, there's no need for a banner, 2540 * is there? 2541 */ 2542 targFmt = ""; 2543 } else { 2544 targFmt = TARG_FMT; 2545 } 2546 2547 if (shellPath == NULL) { 2548 /* 2549 * The user didn't specify a shell to use, so we are using the 2550 * default one... Both the absolute path and the last component 2551 * must be set. The last component is taken from the 'name' field 2552 * of the default shell description pointed-to by commandShell. 2553 * All default shells are located in _PATH_DEFSHELLDIR. 2554 */ 2555 shellName = commandShell->name; 2556 shellPath = str_concat(_PATH_DEFSHELLDIR, shellName, STR_ADDSLASH); 2557 } 2558 2559 if (commandShell->exit == NULL) { 2560 commandShell->exit = ""; 2561 } 2562 if (commandShell->echo == NULL) { 2563 commandShell->echo = ""; 2564 } 2565 2566 /* 2567 * Catch the four signals that POSIX specifies if they aren't ignored. 2568 * JobPassSig will take care of calling JobInterrupt if appropriate. 2569 */ 2570 if (signal(SIGINT, SIG_IGN) != SIG_IGN) { 2571 (void) signal(SIGINT, JobPassSig); 2572 } 2573 if (signal(SIGHUP, SIG_IGN) != SIG_IGN) { 2574 (void) signal(SIGHUP, JobPassSig); 2575 } 2576 if (signal(SIGQUIT, SIG_IGN) != SIG_IGN) { 2577 (void) signal(SIGQUIT, JobPassSig); 2578 } 2579 if (signal(SIGTERM, SIG_IGN) != SIG_IGN) { 2580 (void) signal(SIGTERM, JobPassSig); 2581 } 2582 /* 2583 * Install a NOOP SIGCHLD handler so we are woken up if we're blocked. 2584 */ 2585 signal(SIGCHLD, JobIgnoreSig); 2586 2587 /* 2588 * There are additional signals that need to be caught and passed if 2589 * either the export system wants to be told directly of signals or if 2590 * we're giving each job its own process group (since then it won't get 2591 * signals from the terminal driver as we own the terminal) 2592 */ 2593 #if defined(RMT_WANTS_SIGNALS) || defined(USE_PGRP) 2594 if (signal(SIGTSTP, SIG_IGN) != SIG_IGN) { 2595 (void) signal(SIGTSTP, JobPassSig); 2596 } 2597 if (signal(SIGTTOU, SIG_IGN) != SIG_IGN) { 2598 (void) signal(SIGTTOU, JobPassSig); 2599 } 2600 if (signal(SIGTTIN, SIG_IGN) != SIG_IGN) { 2601 (void) signal(SIGTTIN, JobPassSig); 2602 } 2603 if (signal(SIGWINCH, SIG_IGN) != SIG_IGN) { 2604 (void) signal(SIGWINCH, JobPassSig); 2605 } 2606 if (signal(SIGCONT, SIG_IGN) != SIG_IGN) { 2607 (void) signal(SIGCONT, JobContinueSig); 2608 } 2609 #endif 2610 2611 begin = Targ_FindNode(".BEGIN", TARG_NOCREATE); 2612 2613 if (begin != NILGNODE) { 2614 JobStart(begin, JOB_SPECIAL, (Job *)0); 2615 while (nJobs) { 2616 Job_CatchOutput(); 2617 #ifndef RMT_WILL_WATCH 2618 Job_CatchChildren(!usePipes); 2619 #endif /* RMT_WILL_WATCH */ 2620 } 2621 } 2622 postCommands = Targ_FindNode(".END", TARG_CREATE); 2623 } 2624 2625 /*- 2626 *----------------------------------------------------------------------- 2627 * Job_Empty -- 2628 * See if the job table is empty. Because the local concurrency may 2629 * be set to 0, it is possible for the job table to become empty, 2630 * while the list of stoppedJobs remains non-empty. In such a case, 2631 * we want to restart as many jobs as we can. 2632 * 2633 * Results: 2634 * TRUE if it is. FALSE if it ain't. 2635 * 2636 * Side Effects: 2637 * None. 2638 * 2639 * ----------------------------------------------------------------------- 2640 */ 2641 Boolean 2642 Job_Empty() 2643 { 2644 if (nJobs == 0) { 2645 if (!Lst_IsEmpty(stoppedJobs) && !aborting) { 2646 /* 2647 * The job table is obviously not full if it has no jobs in 2648 * it...Try and restart the stopped jobs. 2649 */ 2650 JobRestartJobs(); 2651 return(FALSE); 2652 } else { 2653 return(TRUE); 2654 } 2655 } else { 2656 return(FALSE); 2657 } 2658 } 2659 2660 /*- 2661 *----------------------------------------------------------------------- 2662 * JobMatchShell -- 2663 * Find a matching shell in 'shells' given its final component. 2664 * 2665 * Results: 2666 * A pointer to the Shell structure. 2667 * 2668 * Side Effects: 2669 * None. 2670 * 2671 *----------------------------------------------------------------------- 2672 */ 2673 static Shell * 2674 JobMatchShell(name) 2675 char *name; /* Final component of shell path */ 2676 { 2677 register Shell *sh; /* Pointer into shells table */ 2678 Shell *match; /* Longest-matching shell */ 2679 register char *cp1, 2680 *cp2; 2681 char *eoname; 2682 2683 eoname = name + strlen(name); 2684 2685 match = NULL; 2686 2687 for (sh = shells; sh->name != NULL; sh++) { 2688 for (cp1 = eoname - strlen(sh->name), cp2 = sh->name; 2689 *cp1 != '\0' && *cp1 == *cp2; 2690 cp1++, cp2++) { 2691 continue; 2692 } 2693 if (*cp1 != *cp2) { 2694 continue; 2695 } else if (match == NULL || strlen(match->name) < strlen(sh->name)) { 2696 match = sh; 2697 } 2698 } 2699 return(match == NULL ? sh : match); 2700 } 2701 2702 /*- 2703 *----------------------------------------------------------------------- 2704 * Job_ParseShell -- 2705 * Parse a shell specification and set up commandShell, shellPath 2706 * and shellName appropriately. 2707 * 2708 * Results: 2709 * FAILURE if the specification was incorrect. 2710 * 2711 * Side Effects: 2712 * commandShell points to a Shell structure (either predefined or 2713 * created from the shell spec), shellPath is the full path of the 2714 * shell described by commandShell, while shellName is just the 2715 * final component of shellPath. 2716 * 2717 * Notes: 2718 * A shell specification consists of a .SHELL target, with dependency 2719 * operator, followed by a series of blank-separated words. Double 2720 * quotes can be used to use blanks in words. A backslash escapes 2721 * anything (most notably a double-quote and a space) and 2722 * provides the functionality it does in C. Each word consists of 2723 * keyword and value separated by an equal sign. There should be no 2724 * unnecessary spaces in the word. The keywords are as follows: 2725 * name Name of shell. 2726 * path Location of shell. Overrides "name" if given 2727 * quiet Command to turn off echoing. 2728 * echo Command to turn echoing on 2729 * filter Result of turning off echoing that shouldn't be 2730 * printed. 2731 * echoFlag Flag to turn echoing on at the start 2732 * errFlag Flag to turn error checking on at the start 2733 * hasErrCtl True if shell has error checking control 2734 * check Command to turn on error checking if hasErrCtl 2735 * is TRUE or template of command to echo a command 2736 * for which error checking is off if hasErrCtl is 2737 * FALSE. 2738 * ignore Command to turn off error checking if hasErrCtl 2739 * is TRUE or template of command to execute a 2740 * command so as to ignore any errors it returns if 2741 * hasErrCtl is FALSE. 2742 * 2743 *----------------------------------------------------------------------- 2744 */ 2745 ReturnStatus 2746 Job_ParseShell(line) 2747 char *line; /* The shell spec */ 2748 { 2749 char **words; 2750 int wordCount; 2751 register char **argv; 2752 register int argc; 2753 char *path; 2754 Shell newShell; 2755 Boolean fullSpec = FALSE; 2756 2757 while (isspace((unsigned char)*line)) { 2758 line++; 2759 } 2760 2761 if (shellArgv) 2762 free(shellArgv); 2763 2764 words = brk_string(line, &wordCount, TRUE, &shellArgv); 2765 2766 memset((Address)&newShell, 0, sizeof(newShell)); 2767 2768 /* 2769 * Parse the specification by keyword 2770 */ 2771 for (path = NULL, argc = wordCount - 1, argv = words; 2772 argc != 0; 2773 argc--, argv++) { 2774 if (strncmp(*argv, "path=", 5) == 0) { 2775 path = &argv[0][5]; 2776 } else if (strncmp(*argv, "name=", 5) == 0) { 2777 newShell.name = &argv[0][5]; 2778 } else { 2779 if (strncmp(*argv, "quiet=", 6) == 0) { 2780 newShell.echoOff = &argv[0][6]; 2781 } else if (strncmp(*argv, "echo=", 5) == 0) { 2782 newShell.echoOn = &argv[0][5]; 2783 } else if (strncmp(*argv, "filter=", 7) == 0) { 2784 newShell.noPrint = &argv[0][7]; 2785 newShell.noPLen = strlen(newShell.noPrint); 2786 } else if (strncmp(*argv, "echoFlag=", 9) == 0) { 2787 newShell.echo = &argv[0][9]; 2788 } else if (strncmp(*argv, "errFlag=", 8) == 0) { 2789 newShell.exit = &argv[0][8]; 2790 } else if (strncmp(*argv, "hasErrCtl=", 10) == 0) { 2791 char c = argv[0][10]; 2792 newShell.hasErrCtl = !((c != 'Y') && (c != 'y') && 2793 (c != 'T') && (c != 't')); 2794 } else if (strncmp(*argv, "check=", 6) == 0) { 2795 newShell.errCheck = &argv[0][6]; 2796 } else if (strncmp(*argv, "ignore=", 7) == 0) { 2797 newShell.ignErr = &argv[0][7]; 2798 } else { 2799 Parse_Error(PARSE_FATAL, "Unknown keyword \"%s\"", 2800 *argv); 2801 free(words); 2802 return(FAILURE); 2803 } 2804 fullSpec = TRUE; 2805 } 2806 } 2807 2808 if (path == NULL) { 2809 /* 2810 * If no path was given, the user wants one of the pre-defined shells, 2811 * yes? So we find the one s/he wants with the help of JobMatchShell 2812 * and set things up the right way. shellPath will be set up by 2813 * Job_Init. 2814 */ 2815 if (newShell.name == NULL) { 2816 Parse_Error(PARSE_FATAL, "Neither path nor name specified"); 2817 return(FAILURE); 2818 } else { 2819 commandShell = JobMatchShell(newShell.name); 2820 shellName = newShell.name; 2821 } 2822 } else { 2823 /* 2824 * The user provided a path. If s/he gave nothing else (fullSpec is 2825 * FALSE), try and find a matching shell in the ones we know of. 2826 * Else we just take the specification at its word and copy it 2827 * to a new location. In either case, we need to record the 2828 * path the user gave for the shell. 2829 */ 2830 shellPath = path; 2831 path = strrchr(path, '/'); 2832 if (path == NULL) { 2833 path = shellPath; 2834 } else { 2835 path += 1; 2836 } 2837 if (newShell.name != NULL) { 2838 shellName = newShell.name; 2839 } else { 2840 shellName = path; 2841 } 2842 if (!fullSpec) { 2843 commandShell = JobMatchShell(shellName); 2844 } else { 2845 commandShell = (Shell *) emalloc(sizeof(Shell)); 2846 *commandShell = newShell; 2847 } 2848 } 2849 2850 if (commandShell->echoOn && commandShell->echoOff) { 2851 commandShell->hasEchoCtl = TRUE; 2852 } 2853 2854 if (!commandShell->hasErrCtl) { 2855 if (commandShell->errCheck == NULL) { 2856 commandShell->errCheck = ""; 2857 } 2858 if (commandShell->ignErr == NULL) { 2859 commandShell->ignErr = "%s\n"; 2860 } 2861 } 2862 2863 /* 2864 * Do not free up the words themselves, since they might be in use by the 2865 * shell specification. 2866 */ 2867 free(words); 2868 return SUCCESS; 2869 } 2870 2871 /*- 2872 *----------------------------------------------------------------------- 2873 * JobInterrupt -- 2874 * Handle the receipt of an interrupt. 2875 * 2876 * Results: 2877 * None 2878 * 2879 * Side Effects: 2880 * All children are killed. Another job will be started if the 2881 * .INTERRUPT target was given. 2882 *----------------------------------------------------------------------- 2883 */ 2884 static void 2885 JobInterrupt(runINTERRUPT, signo) 2886 int runINTERRUPT; /* Non-zero if commands for the .INTERRUPT 2887 * target should be executed */ 2888 int signo; /* signal received */ 2889 { 2890 LstNode ln; /* element in job table */ 2891 Job *job; /* job descriptor in that element */ 2892 GNode *interrupt; /* the node describing the .INTERRUPT target */ 2893 2894 aborting = ABORT_INTERRUPT; 2895 2896 (void) Lst_Open(jobs); 2897 while ((ln = Lst_Next(jobs)) != NILLNODE) { 2898 job = (Job *) Lst_Datum(ln); 2899 2900 if (!Targ_Precious(job->node)) { 2901 char *file = (job->node->path == NULL ? 2902 job->node->name : 2903 job->node->path); 2904 if (!noExecute && eunlink(file) != -1) { 2905 Error("*** %s removed", file); 2906 } 2907 } 2908 #ifdef RMT_WANTS_SIGNALS 2909 if (job->flags & JOB_REMOTE) { 2910 /* 2911 * If job is remote, let the Rmt module do the killing. 2912 */ 2913 if (!Rmt_Signal(job, signo)) { 2914 /* 2915 * If couldn't kill the thing, finish it out now with an 2916 * error code, since no exit report will come in likely. 2917 */ 2918 int status; 2919 2920 status.w_status = 0; 2921 status.w_retcode = 1; 2922 JobFinish(job, &status); 2923 } 2924 } else if (job->pid) { 2925 KILL(job->pid, signo); 2926 } 2927 #else 2928 if (job->pid) { 2929 if (DEBUG(JOB)) { 2930 (void) fprintf(stdout, 2931 "JobInterrupt passing signal to child %d.\n", 2932 job->pid); 2933 (void) fflush(stdout); 2934 } 2935 KILL(job->pid, signo); 2936 } 2937 #endif /* RMT_WANTS_SIGNALS */ 2938 } 2939 Lst_Close(jobs); 2940 2941 #ifdef REMOTE 2942 (void)Lst_Open(stoppedJobs); 2943 while ((ln = Lst_Next(stoppedJobs)) != NILLNODE) { 2944 job = (Job *) Lst_Datum(ln); 2945 2946 if (job->flags & JOB_RESTART) { 2947 if (DEBUG(JOB)) { 2948 (void) fprintf(stdout, "%s%s", 2949 "JobInterrupt skipping job on stopped queue", 2950 "-- it was waiting to be restarted.\n"); 2951 (void) fflush(stdout); 2952 } 2953 continue; 2954 } 2955 if (!Targ_Precious(job->node)) { 2956 char *file = (job->node->path == NULL ? 2957 job->node->name : 2958 job->node->path); 2959 if (eunlink(file) == 0) { 2960 Error("*** %s removed", file); 2961 } 2962 } 2963 /* 2964 * Resume the thing so it will take the signal. 2965 */ 2966 if (DEBUG(JOB)) { 2967 (void) fprintf(stdout, 2968 "JobInterrupt passing CONT to stopped child %d.\n", 2969 job->pid); 2970 (void) fflush(stdout); 2971 } 2972 KILL(job->pid, SIGCONT); 2973 #ifdef RMT_WANTS_SIGNALS 2974 if (job->flags & JOB_REMOTE) { 2975 /* 2976 * If job is remote, let the Rmt module do the killing. 2977 */ 2978 if (!Rmt_Signal(job, SIGINT)) { 2979 /* 2980 * If couldn't kill the thing, finish it out now with an 2981 * error code, since no exit report will come in likely. 2982 */ 2983 int status; 2984 status.w_status = 0; 2985 status.w_retcode = 1; 2986 JobFinish(job, &status); 2987 } 2988 } else if (job->pid) { 2989 if (DEBUG(JOB)) { 2990 (void) fprintf(stdout, 2991 "JobInterrupt passing interrupt to stopped child %d.\n", 2992 job->pid); 2993 (void) fflush(stdout); 2994 } 2995 KILL(job->pid, SIGINT); 2996 } 2997 #endif /* RMT_WANTS_SIGNALS */ 2998 } 2999 Lst_Close(stoppedJobs); 3000 #endif /* REMOTE */ 3001 3002 if (runINTERRUPT && !touchFlag) { 3003 interrupt = Targ_FindNode(".INTERRUPT", TARG_NOCREATE); 3004 if (interrupt != NILGNODE) { 3005 ignoreErrors = FALSE; 3006 3007 JobStart(interrupt, JOB_IGNDOTS, (Job *)0); 3008 while (nJobs) { 3009 Job_CatchOutput(); 3010 #ifndef RMT_WILL_WATCH 3011 Job_CatchChildren(!usePipes); 3012 #endif /* RMT_WILL_WATCH */ 3013 } 3014 } 3015 } 3016 Trace_Log(MAKEINTR, 0); 3017 exit(signo); 3018 } 3019 3020 /* 3021 *----------------------------------------------------------------------- 3022 * Job_Finish -- 3023 * Do final processing such as the running of the commands 3024 * attached to the .END target. 3025 * 3026 * Results: 3027 * Number of errors reported. 3028 * 3029 * Side Effects: 3030 * None. 3031 *----------------------------------------------------------------------- 3032 */ 3033 int 3034 Job_Finish() 3035 { 3036 if (postCommands != NILGNODE && !Lst_IsEmpty(postCommands->commands)) { 3037 if (errors) { 3038 Error("Errors reported so .END ignored"); 3039 } else { 3040 JobStart(postCommands, JOB_SPECIAL | JOB_IGNDOTS, NULL); 3041 3042 while (nJobs) { 3043 Job_CatchOutput(); 3044 #ifndef RMT_WILL_WATCH 3045 Job_CatchChildren(!usePipes); 3046 #endif /* RMT_WILL_WATCH */ 3047 } 3048 } 3049 } 3050 Job_TokenFlush(); 3051 return(errors); 3052 } 3053 3054 /*- 3055 *----------------------------------------------------------------------- 3056 * Job_End -- 3057 * Cleanup any memory used by the jobs module 3058 * 3059 * Results: 3060 * None. 3061 * 3062 * Side Effects: 3063 * Memory is freed 3064 *----------------------------------------------------------------------- 3065 */ 3066 void 3067 Job_End() 3068 { 3069 #ifdef CLEANUP 3070 if (shellArgv) 3071 free(shellArgv); 3072 #endif 3073 } 3074 3075 /*- 3076 *----------------------------------------------------------------------- 3077 * Job_Wait -- 3078 * Waits for all running jobs to finish and returns. Sets 'aborting' 3079 * to ABORT_WAIT to prevent other jobs from starting. 3080 * 3081 * Results: 3082 * None. 3083 * 3084 * Side Effects: 3085 * Currently running jobs finish. 3086 * 3087 *----------------------------------------------------------------------- 3088 */ 3089 void 3090 Job_Wait() 3091 { 3092 aborting = ABORT_WAIT; 3093 while (nJobs != 0) { 3094 Job_CatchOutput(); 3095 #ifndef RMT_WILL_WATCH 3096 Job_CatchChildren(!usePipes); 3097 #endif /* RMT_WILL_WATCH */ 3098 } 3099 Job_TokenFlush(); 3100 aborting = 0; 3101 } 3102 3103 /*- 3104 *----------------------------------------------------------------------- 3105 * Job_AbortAll -- 3106 * Abort all currently running jobs without handling output or anything. 3107 * This function is to be called only in the event of a major 3108 * error. Most definitely NOT to be called from JobInterrupt. 3109 * 3110 * Results: 3111 * None 3112 * 3113 * Side Effects: 3114 * All children are killed, not just the firstborn 3115 *----------------------------------------------------------------------- 3116 */ 3117 void 3118 Job_AbortAll() 3119 { 3120 LstNode ln; /* element in job table */ 3121 Job *job; /* the job descriptor in that element */ 3122 int foo; 3123 3124 aborting = ABORT_ERROR; 3125 3126 if (nJobs) { 3127 3128 (void) Lst_Open(jobs); 3129 while ((ln = Lst_Next(jobs)) != NILLNODE) { 3130 job = (Job *) Lst_Datum(ln); 3131 3132 /* 3133 * kill the child process with increasingly drastic signals to make 3134 * darn sure it's dead. 3135 */ 3136 #ifdef RMT_WANTS_SIGNALS 3137 if (job->flags & JOB_REMOTE) { 3138 Rmt_Signal(job, SIGINT); 3139 Rmt_Signal(job, SIGKILL); 3140 } else { 3141 KILL(job->pid, SIGINT); 3142 KILL(job->pid, SIGKILL); 3143 } 3144 #else 3145 KILL(job->pid, SIGINT); 3146 KILL(job->pid, SIGKILL); 3147 #endif /* RMT_WANTS_SIGNALS */ 3148 } 3149 } 3150 3151 /* 3152 * Catch as many children as want to report in at first, then give up 3153 */ 3154 while (waitpid((pid_t) -1, &foo, WNOHANG) > 0) 3155 continue; 3156 } 3157 3158 #ifdef REMOTE 3159 /*- 3160 *----------------------------------------------------------------------- 3161 * JobFlagForMigration -- 3162 * Handle the eviction of a child. Called from RmtStatusChange. 3163 * Flags the child as remigratable and then suspends it. 3164 * 3165 * Results: 3166 * none. 3167 * 3168 * Side Effects: 3169 * The job descriptor is flagged for remigration. 3170 * 3171 *----------------------------------------------------------------------- 3172 */ 3173 void 3174 JobFlagForMigration(hostID) 3175 int hostID; /* ID of host we used, for matching children. */ 3176 { 3177 register Job *job; /* job descriptor for dead child */ 3178 LstNode jnode; /* list element for finding job */ 3179 3180 if (DEBUG(JOB)) { 3181 (void) fprintf(stdout, "JobFlagForMigration(%d) called.\n", hostID); 3182 (void) fflush(stdout); 3183 } 3184 jnode = Lst_Find(jobs, (ClientData)hostID, JobCmpRmtID); 3185 3186 if (jnode == NILLNODE) { 3187 jnode = Lst_Find(stoppedJobs, (ClientData)hostID, JobCmpRmtID); 3188 if (jnode == NILLNODE) { 3189 if (DEBUG(JOB)) { 3190 Error("Evicting host(%d) not in table", hostID); 3191 } 3192 return; 3193 } 3194 } 3195 job = (Job *) Lst_Datum(jnode); 3196 3197 if (DEBUG(JOB)) { 3198 (void) fprintf(stdout, 3199 "JobFlagForMigration(%d) found job '%s'.\n", hostID, 3200 job->node->name); 3201 (void) fflush(stdout); 3202 } 3203 3204 KILL(job->pid, SIGSTOP); 3205 3206 job->flags |= JOB_REMIGRATE; 3207 } 3208 3209 #endif 3210 3211 /*- 3213 *----------------------------------------------------------------------- 3214 * JobRestartJobs -- 3215 * Tries to restart stopped jobs if there are slots available. 3216 * Note that this tries to restart them regardless of pending errors. 3217 * It's not good to leave stopped jobs lying around! 3218 * 3219 * Results: 3220 * None. 3221 * 3222 * Side Effects: 3223 * Resumes(and possibly migrates) jobs. 3224 * 3225 *----------------------------------------------------------------------- 3226 */ 3227 static void 3228 JobRestartJobs() 3229 { 3230 while (!Lst_IsEmpty(stoppedJobs)) { 3231 if (DEBUG(JOB)) { 3232 (void) fprintf(stdout, "Restarting a stopped job.\n"); 3233 (void) fflush(stdout); 3234 } 3235 if (JobRestart((Job *)Lst_DeQueue(stoppedJobs)) != 0) 3236 break; 3237 } 3238 } 3239 3240 #ifndef RMT_WILL_WATCH 3241 #ifndef USE_SELECT 3242 static void 3243 watchfd(job) 3244 Job *job; 3245 { 3246 int i; 3247 if (job->inPollfd != NULL) 3248 Punt("Watching watched job"); 3249 if (fds == NULL) { 3250 maxfds = JBSTART; 3251 fds = emalloc(sizeof(struct pollfd) * maxfds); 3252 jobfds = emalloc(sizeof(Job **) * maxfds); 3253 3254 fds[0].fd = job_pipe[0]; 3255 fds[0].events = POLLIN; 3256 jobfds[0] = &tokenWaitJob; 3257 tokenWaitJob.inPollfd = &fds[0]; 3258 nfds++; 3259 } else if (nfds == maxfds) { 3260 maxfds *= JBFACTOR; 3261 fds = erealloc(fds, sizeof(struct pollfd) * maxfds); 3262 jobfds = erealloc(jobfds, sizeof(Job **) * maxfds); 3263 for (i = 0; i < nfds; i++) 3264 jobfds[i]->inPollfd = &fds[i]; 3265 } 3266 3267 fds[nfds].fd = job->inPipe; 3268 fds[nfds].events = POLLIN; 3269 jobfds[nfds] = job; 3270 job->inPollfd = &fds[nfds]; 3271 nfds++; 3272 } 3273 3274 static void 3275 clearfd(job) 3276 Job *job; 3277 { 3278 int i; 3279 if (job->inPollfd == NULL) 3280 Punt("Unwatching unwatched job"); 3281 i = job->inPollfd - fds; 3282 nfds--; 3283 /* 3284 * Move last job in table into hole made by dead job. 3285 */ 3286 if (nfds != i) { 3287 fds[i] = fds[nfds]; 3288 jobfds[i] = jobfds[nfds]; 3289 jobfds[i]->inPollfd = &fds[i]; 3290 } 3291 job->inPollfd = NULL; 3292 } 3293 3294 static int 3295 readyfd(job) 3296 Job *job; 3297 { 3298 if (job->inPollfd == NULL) 3299 Punt("Polling unwatched job"); 3300 return (job->inPollfd->revents & POLLIN) != 0; 3301 } 3302 #endif 3303 #endif 3304 3305 /*- 3306 *----------------------------------------------------------------------- 3307 * JobTokenAdd -- 3308 * Put a token into the job pipe so that some make process can start 3309 * another job. 3310 * 3311 * Side Effects: 3312 * Allows more build jobs to be spawned somewhere. 3313 * 3314 *----------------------------------------------------------------------- 3315 */ 3316 3317 static void 3318 JobTokenAdd() 3319 { 3320 3321 if (DEBUG(JOB)) 3322 printf("deposit token\n"); 3323 write(job_pipe[1], "+", 1); 3324 } 3325 3326 /*- 3327 *----------------------------------------------------------------------- 3328 * Job_ServerStartTokenAdd -- 3329 * Prep the job token pipe in the root make process. 3330 * 3331 *----------------------------------------------------------------------- 3332 */ 3333 3334 void Job_ServerStart(maxproc) 3335 int maxproc; 3336 { 3337 int i, flags; 3338 char jobarg[64]; 3339 3340 if (pipe(job_pipe) < 0) 3341 Fatal ("error in pipe: %s", strerror(errno)); 3342 3343 /* 3344 * We mark the input side of the pipe non-blocking; we poll(2) the 3345 * pipe when we're waiting for a job token, but we might lose the 3346 * race for the token when a new one becomes available, so the read 3347 * from the pipe should not block. 3348 */ 3349 flags = fcntl(job_pipe[0], F_GETFL, 0); 3350 flags |= O_NONBLOCK; 3351 fcntl(job_pipe[0], F_SETFL, flags); 3352 3353 /* 3354 * Mark job pipes as close-on-exec. 3355 * Note that we will clear this when executing submakes. 3356 */ 3357 fcntl(job_pipe[0], F_SETFD, 1); 3358 fcntl(job_pipe[1], F_SETFD, 1); 3359 3360 snprintf(jobarg, sizeof(jobarg), "%d,%d", job_pipe[0], job_pipe[1]); 3361 3362 Var_Append(MAKEFLAGS, "-J", VAR_GLOBAL); 3363 Var_Append(MAKEFLAGS, jobarg, VAR_GLOBAL); 3364 3365 /* 3366 * Preload job_pipe with one token per job, save the one 3367 * "extra" token for the primary job. 3368 * 3369 * XXX should clip maxJobs against PIPE_BUF -- if maxJobs is 3370 * larger than the write buffer size of the pipe, we will 3371 * deadlock here. 3372 */ 3373 for (i=1; i < maxproc; i++) 3374 JobTokenAdd(); 3375 } 3376 3377 /* 3378 * this tracks the number of tokens currently "out" to build jobs. 3379 */ 3380 int jobTokensRunning = 0; 3381 int jobTokensFree = 0; 3382 /*- 3383 *----------------------------------------------------------------------- 3384 * Job_TokenReturn -- 3385 * Return a withdrawn token to the pool. 3386 * 3387 *----------------------------------------------------------------------- 3388 */ 3389 3390 void 3391 Job_TokenReturn() 3392 { 3393 jobTokensRunning--; 3394 if (jobTokensRunning < 0) 3395 Punt("token botch"); 3396 if (jobTokensRunning) 3397 jobTokensFree++; 3398 } 3399 3400 /*- 3401 *----------------------------------------------------------------------- 3402 * Job_TokenWithdraw -- 3403 * Attempt to withdraw a token from the pool. 3404 * 3405 * Results: 3406 * Returns TRUE if a token was withdrawn, and FALSE if the pool 3407 * is currently empty. 3408 * 3409 * Side Effects: 3410 * If pool is empty, set wantToken so that we wake up 3411 * when a token is released. 3412 * 3413 *----------------------------------------------------------------------- 3414 */ 3415 3416 3417 Boolean 3418 Job_TokenWithdraw() 3419 { 3420 char tok; 3421 int count; 3422 3423 wantToken = FALSE; 3424 3425 if (aborting) 3426 return FALSE; 3427 3428 if (jobTokensRunning == 0) { 3429 if (DEBUG(JOB)) 3430 printf("first one's free\n"); 3431 jobTokensRunning++; 3432 return TRUE; 3433 } 3434 if (jobTokensFree > 0) { 3435 jobTokensFree--; 3436 jobTokensRunning++; 3437 return TRUE; 3438 } 3439 count = read(job_pipe[0], &tok, 1); 3440 if (count == 0) 3441 Fatal("eof on job pipe!"); 3442 else if (count < 0) { 3443 if (errno != EAGAIN) { 3444 Fatal("job pipe read: %s", strerror(errno)); 3445 } 3446 if (DEBUG(JOB)) 3447 printf("blocked for token\n"); 3448 wantToken = TRUE; 3449 return FALSE; 3450 } 3451 jobTokensRunning++; 3452 if (DEBUG(JOB)) 3453 printf("withdrew token\n"); 3454 return TRUE; 3455 } 3456 3457 /*- 3458 *----------------------------------------------------------------------- 3459 * Job_TokenFlush -- 3460 * Return free tokens to the pool. 3461 * 3462 *----------------------------------------------------------------------- 3463 */ 3464 3465 void 3466 Job_TokenFlush() 3467 { 3468 if (compatMake) return; 3469 3470 while (jobTokensFree > 0) { 3471 JobTokenAdd(); 3472 jobTokensFree--; 3473 } 3474 } 3475 3476
Indexes created Wed Sep 24 02:09:48 GMT 2025