job.c revision 1.42
1 /* $NetBSD: job.c,v 1.42 2000/12/30 14:21:22 sommerfeld 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 1.42 2000/12/30 14:21:22 sommerfeld 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 1.42 2000/12/30 14:21:22 sommerfeld 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 static int JobCmpPid __P((ClientData, ClientData)); 312 static int JobPrintCommand __P((ClientData, ClientData)); 313 static int JobSaveCommand __P((ClientData, ClientData)); 314 static void JobClose __P((Job *)); 315 #ifdef REMOTE 316 static int JobCmpRmtID __P((Job *, int)); 317 # ifdef RMT_WILL_WATCH 318 static void JobLocalInput __P((int, Job *)); 319 # endif 320 #else 321 static void JobFinish __P((Job *, int *)); 322 static void JobExec __P((Job *, char **)); 323 #endif 324 static void JobMakeArgv __P((Job *, char **)); 325 static void JobRestart __P((Job *)); 326 static int JobStart __P((GNode *, int, Job *)); 327 static char *JobOutput __P((Job *, char *, char *, int)); 328 static void JobDoOutput __P((Job *, Boolean)); 329 static Shell *JobMatchShell __P((char *)); 330 static void JobInterrupt __P((int, int)); 331 static void JobRestartJobs __P((void)); 332 static void JobTokenAdd __P((void)); 333 334 /*- 335 *----------------------------------------------------------------------- 336 * JobCondPassSig -- 337 * Pass a signal to a job if the job is remote or if USE_PGRP 338 * is defined. 339 * 340 * Results: 341 * === 0 342 * 343 * Side Effects: 344 * None, except the job may bite it. 345 * 346 *----------------------------------------------------------------------- 347 */ 348 static int 349 JobCondPassSig(jobp, signop) 350 ClientData jobp; /* Job to biff */ 351 ClientData signop; /* Signal to send it */ 352 { 353 Job *job = (Job *) jobp; 354 int signo = *(int *) signop; 355 #ifdef RMT_WANTS_SIGNALS 356 if (job->flags & JOB_REMOTE) { 357 (void) Rmt_Signal(job, signo); 358 } else { 359 KILL(job->pid, signo); 360 } 361 #else 362 /* 363 * Assume that sending the signal to job->pid will signal any remote 364 * job as well. 365 */ 366 if (DEBUG(JOB)) { 367 (void) fprintf(stdout, 368 "JobCondPassSig passing signal %d to child %d.\n", 369 signo, job->pid); 370 (void) fflush(stdout); 371 } 372 KILL(job->pid, signo); 373 #endif 374 return 0; 375 } 376 377 /*- 378 *----------------------------------------------------------------------- 379 * JobIgnoreSig -- 380 * No-op signal handler so we wake up from poll. 381 * 382 * Results: 383 * None. 384 * 385 * Side Effects: 386 * None. 387 * 388 *----------------------------------------------------------------------- 389 */ 390 static void 391 JobIgnoreSig(signo) 392 int signo; /* The signal number we've received */ 393 { 394 /* 395 * Do nothing. The mere fact that we've been called will cause 396 * poll/select in Job_CatchOutput() to return early. 397 */ 398 } 399 400 401 402 /*- 403 *----------------------------------------------------------------------- 404 * JobPassSig -- 405 * Pass a signal on to all remote jobs and to all local jobs if 406 * USE_PGRP is defined, then die ourselves. 407 * 408 * Results: 409 * None. 410 * 411 * Side Effects: 412 * We die by the same signal. 413 * 414 *----------------------------------------------------------------------- 415 */ 416 static void 417 JobPassSig(signo) 418 int signo; /* The signal number we've received */ 419 { 420 sigset_t nmask, omask; 421 struct sigaction act; 422 int sigcont; 423 424 if (DEBUG(JOB)) { 425 (void) fprintf(stdout, "JobPassSig(%d) called.\n", signo); 426 (void) fflush(stdout); 427 } 428 Lst_ForEach(jobs, JobCondPassSig, (ClientData) &signo); 429 430 /* 431 * Deal with proper cleanup based on the signal received. We only run 432 * the .INTERRUPT target if the signal was in fact an interrupt. The other 433 * three termination signals are more of a "get out *now*" command. 434 */ 435 if (signo == SIGINT) { 436 JobInterrupt(TRUE, signo); 437 } else if ((signo == SIGHUP) || (signo == SIGTERM) || (signo == SIGQUIT)) { 438 JobInterrupt(FALSE, signo); 439 } 440 441 /* 442 * Leave gracefully if SIGQUIT, rather than core dumping. 443 */ 444 if (signo == SIGQUIT) { 445 Finish(0); 446 } 447 448 /* 449 * Send ourselves the signal now we've given the message to everyone else. 450 * Note we block everything else possible while we're getting the signal. 451 * This ensures that all our jobs get continued when we wake up before 452 * we take any other signal. 453 */ 454 sigfillset(&nmask); 455 sigprocmask(SIG_SETMASK, &nmask, &omask); 456 act.sa_handler = SIG_DFL; 457 sigemptyset(&act.sa_mask); 458 act.sa_flags = 0; 459 sigaction(signo, &act, NULL); 460 461 if (DEBUG(JOB)) { 462 (void) fprintf(stdout, 463 "JobPassSig passing signal to self, mask = %x.\n", 464 ~0 & ~(1 << (signo-1))); 465 (void) fflush(stdout); 466 } 467 468 (void) kill(getpid(), signo); 469 if (signo != SIGTSTP) { 470 sigcont = SIGCONT; 471 Lst_ForEach(jobs, JobCondPassSig, (ClientData) &sigcont); 472 } 473 474 (void) sigprocmask(SIG_SETMASK, &omask, NULL); 475 sigprocmask(SIG_SETMASK, &omask, NULL); 476 if (signo != SIGCONT && signo != SIGTSTP) { 477 act.sa_handler = JobPassSig; 478 sigaction(sigcont, &act, NULL); 479 } 480 } 481 482 /*- 483 *----------------------------------------------------------------------- 484 * JobCmpPid -- 485 * Compare the pid of the job with the given pid and return 0 if they 486 * are equal. This function is called from Job_CatchChildren via 487 * Lst_Find to find the job descriptor of the finished job. 488 * 489 * Results: 490 * 0 if the pid's match 491 * 492 * Side Effects: 493 * None 494 *----------------------------------------------------------------------- 495 */ 496 static int 497 JobCmpPid(job, pid) 498 ClientData job; /* job to examine */ 499 ClientData pid; /* process id desired */ 500 { 501 return *(int *) pid - ((Job *) job)->pid; 502 } 503 504 #ifdef REMOTE 505 /*- 506 *----------------------------------------------------------------------- 507 * JobCmpRmtID -- 508 * Compare the rmtID of the job with the given rmtID and return 0 if they 509 * are equal. 510 * 511 * Results: 512 * 0 if the rmtID's match 513 * 514 * Side Effects: 515 * None. 516 *----------------------------------------------------------------------- 517 */ 518 static int 519 JobCmpRmtID(job, rmtID) 520 ClientData job; /* job to examine */ 521 ClientData rmtID; /* remote id desired */ 522 { 523 return(*(int *) rmtID - *(int *) job->rmtID); 524 } 525 #endif 526 527 /*- 528 *----------------------------------------------------------------------- 529 * JobPrintCommand -- 530 * Put out another command for the given job. If the command starts 531 * with an @ or a - we process it specially. In the former case, 532 * so long as the -s and -n flags weren't given to make, we stick 533 * a shell-specific echoOff command in the script. In the latter, 534 * we ignore errors for the entire job, unless the shell has error 535 * control. 536 * If the command is just "..." we take all future commands for this 537 * job to be commands to be executed once the entire graph has been 538 * made and return non-zero to signal that the end of the commands 539 * was reached. These commands are later attached to the postCommands 540 * node and executed by Job_End when all things are done. 541 * This function is called from JobStart via Lst_ForEach. 542 * 543 * Results: 544 * Always 0, unless the command was "..." 545 * 546 * Side Effects: 547 * If the command begins with a '-' and the shell has no error control, 548 * the JOB_IGNERR flag is set in the job descriptor. 549 * If the command is "..." and we're not ignoring such things, 550 * tailCmds is set to the successor node of the cmd. 551 * numCommands is incremented if the command is actually printed. 552 *----------------------------------------------------------------------- 553 */ 554 static int 555 JobPrintCommand(cmdp, jobp) 556 ClientData cmdp; /* command string to print */ 557 ClientData jobp; /* job for which to print it */ 558 { 559 Boolean noSpecials; /* true if we shouldn't worry about 560 * inserting special commands into 561 * the input stream. */ 562 Boolean shutUp = FALSE; /* true if we put a no echo command 563 * into the command file */ 564 Boolean errOff = FALSE; /* true if we turned error checking 565 * off before printing the command 566 * and need to turn it back on */ 567 char *cmdTemplate; /* Template to use when printing the 568 * command */ 569 char *cmdStart; /* Start of expanded command */ 570 LstNode cmdNode; /* Node for replacing the command */ 571 char *cmd = (char *) cmdp; 572 Job *job = (Job *) jobp; 573 char *cp; 574 575 noSpecials = noExecute && !(job->node->type & OP_MAKE); 576 577 if (strcmp(cmd, "...") == 0) { 578 job->node->type |= OP_SAVE_CMDS; 579 if ((job->flags & JOB_IGNDOTS) == 0) { 580 job->tailCmds = Lst_Succ(Lst_Member(job->node->commands, 581 (ClientData)cmd)); 582 return 1; 583 } 584 return 0; 585 } 586 587 #define DBPRINTF(fmt, arg) if (DEBUG(JOB)) { \ 588 (void) fprintf(stdout, fmt, arg); \ 589 (void) fflush(stdout); \ 590 } \ 591 (void) fprintf(job->cmdFILE, fmt, arg); \ 592 (void) fflush(job->cmdFILE); 593 594 numCommands += 1; 595 596 /* 597 * For debugging, we replace each command with the result of expanding 598 * the variables in the command. 599 */ 600 cmdNode = Lst_Member(job->node->commands, (ClientData)cmd); 601 cmdStart = cmd = Var_Subst(NULL, cmd, job->node, FALSE); 602 Lst_Replace(cmdNode, (ClientData)cmdStart); 603 604 cmdTemplate = "%s\n"; 605 606 /* 607 * Check for leading @' and -'s to control echoing and error checking. 608 */ 609 while (*cmd == '@' || *cmd == '-') { 610 if (*cmd == '@') { 611 shutUp = TRUE; 612 } else { 613 errOff = TRUE; 614 } 615 cmd++; 616 } 617 618 while (isspace((unsigned char) *cmd)) 619 cmd++; 620 621 if (shutUp) { 622 if (!(job->flags & JOB_SILENT) && !noSpecials && 623 commandShell->hasEchoCtl) { 624 DBPRINTF("%s\n", commandShell->echoOff); 625 } else { 626 shutUp = FALSE; 627 } 628 } 629 630 if (errOff) { 631 if ( !(job->flags & JOB_IGNERR) && !noSpecials) { 632 if (commandShell->hasErrCtl) { 633 /* 634 * we don't want the error-control commands showing 635 * up either, so we turn off echoing while executing 636 * them. We could put another field in the shell 637 * structure to tell JobDoOutput to look for this 638 * string too, but why make it any more complex than 639 * it already is? 640 */ 641 if (!(job->flags & JOB_SILENT) && !shutUp && 642 commandShell->hasEchoCtl) { 643 DBPRINTF("%s\n", commandShell->echoOff); 644 DBPRINTF("%s\n", commandShell->ignErr); 645 DBPRINTF("%s\n", commandShell->echoOn); 646 } else { 647 DBPRINTF("%s\n", commandShell->ignErr); 648 } 649 } else if (commandShell->ignErr && 650 (*commandShell->ignErr != '\0')) 651 { 652 /* 653 * The shell has no error control, so we need to be 654 * weird to get it to ignore any errors from the command. 655 * If echoing is turned on, we turn it off and use the 656 * errCheck template to echo the command. Leave echoing 657 * off so the user doesn't see the weirdness we go through 658 * to ignore errors. Set cmdTemplate to use the weirdness 659 * instead of the simple "%s\n" template. 660 */ 661 if (!(job->flags & JOB_SILENT) && !shutUp && 662 commandShell->hasEchoCtl) { 663 DBPRINTF("%s\n", commandShell->echoOff); 664 DBPRINTF(commandShell->errCheck, cmd); 665 shutUp = TRUE; 666 } 667 cmdTemplate = commandShell->ignErr; 668 /* 669 * The error ignoration (hee hee) is already taken care 670 * of by the ignErr template, so pretend error checking 671 * is still on. 672 */ 673 errOff = FALSE; 674 } else { 675 errOff = FALSE; 676 } 677 } else { 678 errOff = FALSE; 679 } 680 } 681 682 if ((cp = Check_Cwd_Cmd(cmd)) != NULL) { 683 DBPRINTF("cd %s; ", cp); 684 } 685 DBPRINTF(cmdTemplate, cmd); 686 free(cmdStart); 687 688 if (errOff) { 689 /* 690 * If echoing is already off, there's no point in issuing the 691 * echoOff command. Otherwise we issue it and pretend it was on 692 * for the whole command... 693 */ 694 if (!shutUp && !(job->flags & JOB_SILENT) && commandShell->hasEchoCtl){ 695 DBPRINTF("%s\n", commandShell->echoOff); 696 shutUp = TRUE; 697 } 698 DBPRINTF("%s\n", commandShell->errCheck); 699 } 700 if (shutUp) { 701 DBPRINTF("%s\n", commandShell->echoOn); 702 } 703 return 0; 704 } 705 706 /*- 707 *----------------------------------------------------------------------- 708 * JobSaveCommand -- 709 * Save a command to be executed when everything else is done. 710 * Callback function for JobFinish... 711 * 712 * Results: 713 * Always returns 0 714 * 715 * Side Effects: 716 * The command is tacked onto the end of postCommands's commands list. 717 * 718 *----------------------------------------------------------------------- 719 */ 720 static int 721 JobSaveCommand(cmd, gn) 722 ClientData cmd; 723 ClientData gn; 724 { 725 cmd = (ClientData) Var_Subst(NULL, (char *) cmd, (GNode *) gn, FALSE); 726 (void) Lst_AtEnd(postCommands->commands, cmd); 727 return(0); 728 } 729 730 731 /*- 732 *----------------------------------------------------------------------- 733 * JobClose -- 734 * Called to close both input and output pipes when a job is finished. 735 * 736 * Results: 737 * Nada 738 * 739 * Side Effects: 740 * The file descriptors associated with the job are closed. 741 * 742 *----------------------------------------------------------------------- 743 */ 744 static void 745 JobClose(job) 746 Job *job; 747 { 748 if (usePipes && (job->flags & JOB_FIRST)) { 749 #ifdef RMT_WILL_WATCH 750 Rmt_Ignore(job->inPipe); 751 #else 752 #ifdef USE_SELECT 753 FD_CLR(job->inPipe, &outputs); 754 #else 755 clearfd(job); 756 #endif 757 #endif 758 if (job->outPipe != job->inPipe) { 759 (void) close(job->outPipe); 760 } 761 JobDoOutput(job, TRUE); 762 (void) close(job->inPipe); 763 } else { 764 (void) close(job->outFd); 765 JobDoOutput(job, TRUE); 766 } 767 } 768 769 /*- 770 *----------------------------------------------------------------------- 771 * JobFinish -- 772 * Do final processing for the given job including updating 773 * parents and starting new jobs as available/necessary. Note 774 * that we pay no attention to the JOB_IGNERR flag here. 775 * This is because when we're called because of a noexecute flag 776 * or something, jstat.w_status is 0 and when called from 777 * Job_CatchChildren, the status is zeroed if it s/b ignored. 778 * 779 * Results: 780 * None 781 * 782 * Side Effects: 783 * Some nodes may be put on the toBeMade queue. 784 * Final commands for the job are placed on postCommands. 785 * 786 * If we got an error and are aborting (aborting == ABORT_ERROR) and 787 * the job list is now empty, we are done for the day. 788 * If we recognized an error (errors !=0), we set the aborting flag 789 * to ABORT_ERROR so no more jobs will be started. 790 *----------------------------------------------------------------------- 791 */ 792 /*ARGSUSED*/ 793 static void 794 JobFinish(job, status) 795 Job *job; /* job to finish */ 796 int *status; /* sub-why job went away */ 797 { 798 Boolean done; 799 800 if ((WIFEXITED(*status) && 801 (((WEXITSTATUS(*status) != 0) && !(job->flags & JOB_IGNERR)))) || 802 WIFSIGNALED(*status)) 803 { 804 /* 805 * If it exited non-zero and either we're doing things our 806 * way or we're not ignoring errors, the job is finished. 807 * Similarly, if the shell died because of a signal 808 * the job is also finished. In these 809 * cases, finish out the job's output before printing the exit 810 * status... 811 */ 812 #ifdef REMOTE 813 KILL(job->pid, SIGCONT); 814 #endif 815 JobClose(job); 816 if (job->cmdFILE != NULL && job->cmdFILE != stdout) { 817 (void) fclose(job->cmdFILE); 818 job->cmdFILE = NULL; 819 } 820 done = TRUE; 821 #ifdef REMOTE 822 if (job->flags & JOB_REMOTE) 823 Rmt_Done(job->rmtID, job->node); 824 #endif 825 } else if (WIFEXITED(*status)) { 826 /* 827 * Deal with ignored errors in -B mode. We need to print a message 828 * telling of the ignored error as well as setting status.w_status 829 * to 0 so the next command gets run. To do this, we set done to be 830 * TRUE if in -B mode and the job exited non-zero. 831 */ 832 done = WEXITSTATUS(*status) != 0; 833 /* 834 * Old comment said: "Note we don't 835 * want to close down any of the streams until we know we're at the 836 * end." 837 * But we do. Otherwise when are we going to print the rest of the 838 * stuff? 839 */ 840 JobClose(job); 841 #ifdef REMOTE 842 if (job->flags & JOB_REMOTE) 843 Rmt_Done(job->rmtID, job->node); 844 #endif /* REMOTE */ 845 } else { 846 /* 847 * No need to close things down or anything. 848 */ 849 done = FALSE; 850 } 851 852 if (done || 853 WIFSTOPPED(*status) || 854 (WIFSIGNALED(*status) && (WTERMSIG(*status) == SIGCONT))) 855 { 856 FILE *out; 857 858 if (compatMake && !usePipes && (job->flags & JOB_IGNERR)) { 859 /* 860 * If output is going to a file and this job is ignoring 861 * errors, arrange to have the exit status sent to the 862 * output file as well. 863 */ 864 out = fdopen(job->outFd, "w"); 865 if (out == NULL) 866 Punt("Cannot fdopen"); 867 } else { 868 out = stdout; 869 } 870 871 if (WIFEXITED(*status)) { 872 if (DEBUG(JOB)) { 873 (void) fprintf(stdout, "Process %d exited.\n", job->pid); 874 (void) fflush(stdout); 875 } 876 if (WEXITSTATUS(*status) != 0) { 877 if (usePipes && job->node != lastNode) { 878 MESSAGE(out, job->node); 879 lastNode = job->node; 880 } 881 (void) fprintf(out, "*** Error code %d%s\n", 882 WEXITSTATUS(*status), 883 (job->flags & JOB_IGNERR) ? "(ignored)" : ""); 884 885 if (job->flags & JOB_IGNERR) { 886 *status = 0; 887 } 888 } else if (DEBUG(JOB)) { 889 if (usePipes && job->node != lastNode) { 890 MESSAGE(out, job->node); 891 lastNode = job->node; 892 } 893 (void) fprintf(out, "*** Completed successfully\n"); 894 } 895 } else if (WIFSTOPPED(*status) && WSTOPSIG(*status) != SIGCONT) { 896 if (DEBUG(JOB)) { 897 (void) fprintf(stdout, "Process %d stopped.\n", job->pid); 898 (void) fflush(stdout); 899 } 900 if (usePipes && job->node != lastNode) { 901 MESSAGE(out, job->node); 902 lastNode = job->node; 903 } 904 if (!(job->flags & JOB_REMIGRATE)) { 905 switch (WSTOPSIG(*status)) { 906 case SIGTSTP: 907 (void) fprintf(out, "*** Suspended\n"); 908 break; 909 case SIGSTOP: 910 (void) fprintf(out, "*** Stopped\n"); 911 break; 912 default: 913 (void) fprintf(out, "*** Stopped -- signal %d\n", 914 WSTOPSIG(*status)); 915 } 916 } 917 job->flags |= JOB_RESUME; 918 (void)Lst_AtEnd(stoppedJobs, (ClientData)job); 919 #ifdef REMOTE 920 if (job->flags & JOB_REMIGRATE) 921 JobRestart(job); 922 #endif 923 (void) fflush(out); 924 return; 925 } else if (WIFSTOPPED(*status) && WSTOPSIG(*status) == SIGCONT) { 926 /* 927 * If the beastie has continued, shift the Job from the stopped 928 * list to the running one (or re-stop it if concurrency is 929 * exceeded) and go and get another child. 930 */ 931 if (job->flags & (JOB_RESUME|JOB_REMIGRATE|JOB_RESTART)) { 932 if (usePipes && job->node != lastNode) { 933 MESSAGE(out, job->node); 934 lastNode = job->node; 935 } 936 (void) fprintf(out, "*** Continued\n"); 937 } 938 if (!(job->flags & JOB_CONTINUING)) { 939 if (DEBUG(JOB)) { 940 (void) fprintf(stdout, 941 "Warning: process %d was not continuing.\n", 942 job->pid); 943 (void) fflush(stdout); 944 } 945 #ifdef notdef 946 /* 947 * We don't really want to restart a job from scratch just 948 * because it continued, especially not without killing the 949 * continuing process! That's why this is ifdef'ed out. 950 * FD - 9/17/90 951 */ 952 JobRestart(job); 953 #endif 954 } 955 job->flags &= ~JOB_CONTINUING; 956 Lst_AtEnd(jobs, (ClientData)job); 957 nJobs += 1; 958 if (!(job->flags & JOB_REMOTE)) { 959 if (DEBUG(JOB)) { 960 (void) fprintf(stdout, 961 "Process %d is continuing locally.\n", 962 job->pid); 963 (void) fflush(stdout); 964 } 965 nLocal += 1; 966 } 967 (void) fflush(out); 968 return; 969 } else { 970 if (usePipes && job->node != lastNode) { 971 MESSAGE(out, job->node); 972 lastNode = job->node; 973 } 974 (void) fprintf(out, "*** Signal %d\n", WTERMSIG(*status)); 975 } 976 977 (void) fflush(out); 978 } 979 980 /* 981 * Now handle the -B-mode stuff. If the beast still isn't finished, 982 * try and restart the job on the next command. If JobStart says it's 983 * ok, it's ok. If there's an error, this puppy is done. 984 */ 985 if (compatMake && (WIFEXITED(*status) && 986 !Lst_IsAtEnd(job->node->commands))) { 987 switch (JobStart(job->node, job->flags & JOB_IGNDOTS, job)) { 988 case JOB_RUNNING: 989 done = FALSE; 990 break; 991 case JOB_ERROR: 992 done = TRUE; 993 *status = W_EXITCODE(1, 0); 994 break; 995 case JOB_FINISHED: 996 /* 997 * If we got back a JOB_FINISHED code, JobStart has already 998 * called Make_Update and freed the job descriptor. We set 999 * done to false here to avoid fake cycles and double frees. 1000 * JobStart needs to do the update so we can proceed up the 1001 * graph when given the -n flag.. 1002 */ 1003 done = FALSE; 1004 break; 1005 } 1006 } else { 1007 done = TRUE; 1008 } 1009 1010 if (done) { 1011 Trace_Log(JOBEND, job); 1012 if (!compatMake) { 1013 if ((*status != 0) || 1014 (aborting == ABORT_ERROR) || 1015 (aborting == ABORT_INTERRUPT)) 1016 Job_TokenReturn(); 1017 } 1018 1019 } 1020 1021 if (done && 1022 (aborting != ABORT_ERROR) && 1023 (aborting != ABORT_INTERRUPT) && 1024 (*status == 0)) 1025 { 1026 /* 1027 * As long as we aren't aborting and the job didn't return a non-zero 1028 * status that we shouldn't ignore, we call Make_Update to update 1029 * the parents. In addition, any saved commands for the node are placed 1030 * on the .END target. 1031 */ 1032 if (job->tailCmds != NILLNODE) { 1033 Lst_ForEachFrom(job->node->commands, job->tailCmds, 1034 JobSaveCommand, 1035 (ClientData)job->node); 1036 } 1037 job->node->made = MADE; 1038 Make_Update(job->node); 1039 free((Address)job); 1040 } else if (*status != 0) { 1041 errors += 1; 1042 free((Address)job); 1043 } 1044 JobRestartJobs(); 1045 1046 /* 1047 * Set aborting if any error. 1048 */ 1049 if (errors && !keepgoing && (aborting != ABORT_INTERRUPT)) { 1050 /* 1051 * If we found any errors in this batch of children and the -k flag 1052 * wasn't given, we set the aborting flag so no more jobs get 1053 * started. 1054 */ 1055 aborting = ABORT_ERROR; 1056 } 1057 1058 if ((aborting == ABORT_ERROR) && Job_Empty()) { 1059 /* 1060 * If we are aborting and the job table is now empty, we finish. 1061 */ 1062 Finish(errors); 1063 } 1064 } 1065 1066 /*- 1067 *----------------------------------------------------------------------- 1068 * Job_Touch -- 1069 * Touch the given target. Called by JobStart when the -t flag was 1070 * given 1071 * 1072 * Results: 1073 * None 1074 * 1075 * Side Effects: 1076 * The data modification of the file is changed. In addition, if the 1077 * file did not exist, it is created. 1078 *----------------------------------------------------------------------- 1079 */ 1080 void 1081 Job_Touch(gn, silent) 1082 GNode *gn; /* the node of the file to touch */ 1083 Boolean silent; /* TRUE if should not print messages */ 1084 { 1085 int streamID; /* ID of stream opened to do the touch */ 1086 struct utimbuf times; /* Times for utime() call */ 1087 1088 if (gn->type & (OP_JOIN|OP_USE|OP_EXEC|OP_OPTIONAL|OP_PHONY)) { 1089 /* 1090 * .JOIN, .USE, .ZEROTIME and .OPTIONAL targets are "virtual" targets 1091 * and, as such, shouldn't really be created. 1092 */ 1093 return; 1094 } 1095 1096 if (!silent || (noExecute && !(gn->type & OP_MAKE))) { 1097 (void) fprintf(stdout, "touch %s\n", gn->name); 1098 (void) fflush(stdout); 1099 } 1100 1101 if (noExecute && !(gn->type & OP_MAKE)) { 1102 return; 1103 } 1104 1105 if (gn->type & OP_ARCHV) { 1106 Arch_Touch(gn); 1107 } else if (gn->type & OP_LIB) { 1108 Arch_TouchLib(gn); 1109 } else { 1110 char *file = gn->path ? gn->path : gn->name; 1111 1112 times.actime = times.modtime = now; 1113 if (utime(file, ×) < 0){ 1114 streamID = open(file, O_RDWR | O_CREAT, 0666); 1115 1116 if (streamID >= 0) { 1117 char c; 1118 1119 /* 1120 * Read and write a byte to the file to change the 1121 * modification time, then close the file. 1122 */ 1123 if (read(streamID, &c, 1) == 1) { 1124 (void) lseek(streamID, (off_t)0, SEEK_SET); 1125 (void) write(streamID, &c, 1); 1126 } 1127 1128 (void) close(streamID); 1129 } else { 1130 (void) fprintf(stdout, "*** couldn't touch %s: %s", 1131 file, strerror(errno)); 1132 (void) fflush(stdout); 1133 } 1134 } 1135 } 1136 } 1137 1138 /*- 1139 *----------------------------------------------------------------------- 1140 * Job_CheckCommands -- 1141 * Make sure the given node has all the commands it needs. 1142 * 1143 * Results: 1144 * TRUE if the commands list is/was ok. 1145 * 1146 * Side Effects: 1147 * The node will have commands from the .DEFAULT rule added to it 1148 * if it needs them. 1149 *----------------------------------------------------------------------- 1150 */ 1151 Boolean 1152 Job_CheckCommands(gn, abortProc) 1153 GNode *gn; /* The target whose commands need 1154 * verifying */ 1155 void (*abortProc) __P((char *, ...)); 1156 /* Function to abort with message */ 1157 { 1158 if (OP_NOP(gn->type) && Lst_IsEmpty(gn->commands) && 1159 (gn->type & OP_LIB) == 0) { 1160 /* 1161 * No commands. Look for .DEFAULT rule from which we might infer 1162 * commands 1163 */ 1164 if ((DEFAULT != NILGNODE) && !Lst_IsEmpty(DEFAULT->commands)) { 1165 char *p1; 1166 /* 1167 * Make only looks for a .DEFAULT if the node was never the 1168 * target of an operator, so that's what we do too. If 1169 * a .DEFAULT was given, we substitute its commands for gn's 1170 * commands and set the IMPSRC variable to be the target's name 1171 * The DEFAULT node acts like a transformation rule, in that 1172 * gn also inherits any attributes or sources attached to 1173 * .DEFAULT itself. 1174 */ 1175 Make_HandleUse(DEFAULT, gn); 1176 Var_Set(IMPSRC, Var_Value(TARGET, gn, &p1), gn); 1177 if (p1) 1178 free(p1); 1179 } else if (Dir_MTime(gn) == 0) { 1180 /* 1181 * The node wasn't the target of an operator we have no .DEFAULT 1182 * rule to go on and the target doesn't already exist. There's 1183 * nothing more we can do for this branch. If the -k flag wasn't 1184 * given, we stop in our tracks, otherwise we just don't update 1185 * this node's parents so they never get examined. 1186 */ 1187 static const char msg[] = "make: don't know how to make"; 1188 1189 if (gn->type & OP_OPTIONAL) { 1190 (void) fprintf(stdout, "%s %s(ignored)\n", msg, gn->name); 1191 (void) fflush(stdout); 1192 } else if (keepgoing) { 1193 (void) fprintf(stdout, "%s %s(continuing)\n", msg, gn->name); 1194 (void) fflush(stdout); 1195 return FALSE; 1196 } else { 1197 (*abortProc)("%s %s. Stop", msg, gn->name); 1198 return FALSE; 1199 } 1200 } 1201 } 1202 return TRUE; 1203 } 1204 #ifdef RMT_WILL_WATCH 1205 /*- 1206 *----------------------------------------------------------------------- 1207 * JobLocalInput -- 1208 * Handle a pipe becoming readable. Callback function for Rmt_Watch 1209 * 1210 * Results: 1211 * None 1212 * 1213 * Side Effects: 1214 * JobDoOutput is called. 1215 * 1216 *----------------------------------------------------------------------- 1217 */ 1218 /*ARGSUSED*/ 1219 static void 1220 JobLocalInput(stream, job) 1221 int stream; /* Stream that's ready (ignored) */ 1222 Job *job; /* Job to which the stream belongs */ 1223 { 1224 JobDoOutput(job, FALSE); 1225 } 1226 #endif /* RMT_WILL_WATCH */ 1227 1228 /*- 1229 *----------------------------------------------------------------------- 1230 * JobExec -- 1231 * Execute the shell for the given job. Called from JobStart and 1232 * JobRestart. 1233 * 1234 * Results: 1235 * None. 1236 * 1237 * Side Effects: 1238 * A shell is executed, outputs is altered and the Job structure added 1239 * to the job table. 1240 * 1241 *----------------------------------------------------------------------- 1242 */ 1243 static void 1244 JobExec(job, argv) 1245 Job *job; /* Job to execute */ 1246 char **argv; 1247 { 1248 int cpid; /* ID of new child */ 1249 1250 if (DEBUG(JOB)) { 1251 int i; 1252 1253 (void) fprintf(stdout, "Running %s %sly\n", job->node->name, 1254 job->flags&JOB_REMOTE?"remote":"local"); 1255 (void) fprintf(stdout, "\tCommand: "); 1256 for (i = 0; argv[i] != NULL; i++) { 1257 (void) fprintf(stdout, "%s ", argv[i]); 1258 } 1259 (void) fprintf(stdout, "\n"); 1260 (void) fflush(stdout); 1261 } 1262 1263 /* 1264 * Some jobs produce no output and it's disconcerting to have 1265 * no feedback of their running (since they produce no output, the 1266 * banner with their name in it never appears). This is an attempt to 1267 * provide that feedback, even if nothing follows it. 1268 */ 1269 if ((lastNode != job->node) && (job->flags & JOB_FIRST) && 1270 !(job->flags & JOB_SILENT)) { 1271 MESSAGE(stdout, job->node); 1272 lastNode = job->node; 1273 } 1274 1275 #ifdef RMT_NO_EXEC 1276 if (job->flags & JOB_REMOTE) { 1277 goto jobExecFinish; 1278 } 1279 #endif /* RMT_NO_EXEC */ 1280 1281 if ((cpid = vfork()) == -1) { 1282 Punt("Cannot vfork"); 1283 } else if (cpid == 0) { 1284 1285 /* 1286 * Must duplicate the input stream down to the child's input and 1287 * reset it to the beginning (again). Since the stream was marked 1288 * close-on-exec, we must clear that bit in the new input. 1289 */ 1290 if (dup2(FILENO(job->cmdFILE), 0) == -1) 1291 Punt("Cannot dup2: %s", strerror(errno)); 1292 (void) fcntl(0, F_SETFD, 0); 1293 (void) lseek(0, (off_t)0, SEEK_SET); 1294 1295 if (job->node->type & OP_MAKE) { 1296 /* 1297 * Pass job token pipe to submakes. 1298 */ 1299 fcntl(job_pipe[0], F_SETFD, 0); 1300 fcntl(job_pipe[1], F_SETFD, 0); 1301 } 1302 1303 if (usePipes) { 1304 /* 1305 * Set up the child's output to be routed through the pipe 1306 * we've created for it. 1307 */ 1308 if (dup2(job->outPipe, 1) == -1) 1309 Punt("Cannot dup2: %s", strerror(errno)); 1310 } else { 1311 /* 1312 * We're capturing output in a file, so we duplicate the 1313 * descriptor to the temporary file into the standard 1314 * output. 1315 */ 1316 if (dup2(job->outFd, 1) == -1) 1317 Punt("Cannot dup2: %s", strerror(errno)); 1318 } 1319 /* 1320 * The output channels are marked close on exec. This bit was 1321 * duplicated by the dup2 (on some systems), so we have to clear 1322 * it before routing the shell's error output to the same place as 1323 * its standard output. 1324 */ 1325 (void) fcntl(1, F_SETFD, 0); 1326 if (dup2(1, 2) == -1) 1327 Punt("Cannot dup2: %s", strerror(errno)); 1328 1329 #ifdef USE_PGRP 1330 /* 1331 * We want to switch the child into a different process family so 1332 * we can kill it and all its descendants in one fell swoop, 1333 * by killing its process family, but not commit suicide. 1334 */ 1335 # if defined(SYSV) 1336 (void) setsid(); 1337 # else 1338 (void) setpgid(0, getpid()); 1339 # endif 1340 #endif /* USE_PGRP */ 1341 1342 #ifdef REMOTE 1343 if (job->flags & JOB_REMOTE) { 1344 Rmt_Exec(shellPath, argv, FALSE); 1345 } else 1346 #endif /* REMOTE */ 1347 (void) execv(shellPath, argv); 1348 1349 (void) write(2, "Could not execute shell\n", 1350 sizeof("Could not execute shell")); 1351 _exit(1); 1352 } else { 1353 #ifdef REMOTE 1354 sigset_t nmask, omask; 1355 sigemptyset(&nmask); 1356 sigaddset(&nmask, SIGCHLD); 1357 sigprocmask(SIG_BLOCK, &nmask, &omask); 1358 #endif 1359 job->pid = cpid; 1360 1361 Trace_Log(JOBSTART, job); 1362 1363 if (usePipes && (job->flags & JOB_FIRST)) { 1364 /* 1365 * The first time a job is run for a node, we set the current 1366 * position in the buffer to the beginning and mark another 1367 * stream to watch in the outputs mask 1368 */ 1369 job->curPos = 0; 1370 1371 #ifdef RMT_WILL_WATCH 1372 Rmt_Watch(job->inPipe, JobLocalInput, job); 1373 #else 1374 #ifdef USE_SELECT 1375 FD_SET(job->inPipe, &outputs); 1376 #else 1377 watchfd(job); 1378 #endif 1379 #endif /* RMT_WILL_WATCH */ 1380 } 1381 1382 if (job->flags & JOB_REMOTE) { 1383 #ifndef REMOTE 1384 job->rmtID = 0; 1385 #else 1386 job->rmtID = Rmt_LastID(job->pid); 1387 #endif /* REMOTE */ 1388 } else { 1389 nLocal += 1; 1390 /* 1391 * XXX: Used to not happen if REMOTE. Why? 1392 */ 1393 if (job->cmdFILE != NULL && job->cmdFILE != stdout) { 1394 (void) fclose(job->cmdFILE); 1395 job->cmdFILE = NULL; 1396 } 1397 } 1398 #ifdef REMOTE 1399 sigprocmask(SIG_SETMASK, &omask, NULL); 1400 #endif 1401 } 1402 1403 #ifdef RMT_NO_EXEC 1404 jobExecFinish: 1405 #endif 1406 /* 1407 * Now the job is actually running, add it to the table. 1408 */ 1409 nJobs += 1; 1410 (void) Lst_AtEnd(jobs, (ClientData)job); 1411 } 1412 1413 /*- 1414 *----------------------------------------------------------------------- 1415 * JobMakeArgv -- 1416 * Create the argv needed to execute the shell for a given job. 1417 * 1418 * 1419 * Results: 1420 * 1421 * Side Effects: 1422 * 1423 *----------------------------------------------------------------------- 1424 */ 1425 static void 1426 JobMakeArgv(job, argv) 1427 Job *job; 1428 char **argv; 1429 { 1430 int argc; 1431 static char args[10]; /* For merged arguments */ 1432 1433 argv[0] = shellName; 1434 argc = 1; 1435 1436 if ((commandShell->exit && (*commandShell->exit != '-')) || 1437 (commandShell->echo && (*commandShell->echo != '-'))) 1438 { 1439 /* 1440 * At least one of the flags doesn't have a minus before it, so 1441 * merge them together. Have to do this because the *(&(@*#*&#$# 1442 * Bourne shell thinks its second argument is a file to source. 1443 * Grrrr. Note the ten-character limitation on the combined arguments. 1444 */ 1445 (void)snprintf(args, sizeof(args), "-%s%s", 1446 ((job->flags & JOB_IGNERR) ? "" : 1447 (commandShell->exit ? commandShell->exit : "")), 1448 ((job->flags & JOB_SILENT) ? "" : 1449 (commandShell->echo ? commandShell->echo : ""))); 1450 1451 if (args[1]) { 1452 argv[argc] = args; 1453 argc++; 1454 } 1455 } else { 1456 if (!(job->flags & JOB_IGNERR) && commandShell->exit) { 1457 argv[argc] = commandShell->exit; 1458 argc++; 1459 } 1460 if (!(job->flags & JOB_SILENT) && commandShell->echo) { 1461 argv[argc] = commandShell->echo; 1462 argc++; 1463 } 1464 } 1465 argv[argc] = NULL; 1466 } 1467 1468 /*- 1469 *----------------------------------------------------------------------- 1470 * JobRestart -- 1471 * Restart a job that stopped for some reason. 1472 * 1473 * Results: 1474 * None. 1475 * 1476 *----------------------------------------------------------------------- 1477 */ 1478 static void 1479 JobRestart(job) 1480 Job *job; /* Job to restart */ 1481 { 1482 #ifdef REMOTE 1483 int host; 1484 #endif 1485 1486 if (job->flags & JOB_REMIGRATE) { 1487 if ( 1488 #ifdef REMOTE 1489 verboseRemigrates || 1490 #endif 1491 DEBUG(JOB)) { 1492 (void) fprintf(stdout, "*** remigrating %x(%s)\n", 1493 job->pid, job->node->name); 1494 (void) fflush(stdout); 1495 } 1496 1497 #ifdef REMOTE 1498 if (!Rmt_ReExport(job->pid, job->node, &host)) { 1499 if (verboseRemigrates || DEBUG(JOB)) { 1500 (void) fprintf(stdout, "*** couldn't migrate...\n"); 1501 (void) fflush(stdout); 1502 } 1503 #endif 1504 if (nLocal != maxLocal) { 1505 /* 1506 * Job cannot be remigrated, but there's room on the local 1507 * machine, so resume the job and note that another 1508 * local job has started. 1509 */ 1510 if ( 1511 #ifdef REMOTE 1512 verboseRemigrates || 1513 #endif 1514 DEBUG(JOB)) { 1515 (void) fprintf(stdout, "*** resuming on local machine\n"); 1516 (void) fflush(stdout); 1517 } 1518 KILL(job->pid, SIGCONT); 1519 nLocal +=1; 1520 #ifdef REMOTE 1521 job->flags &= ~(JOB_REMIGRATE|JOB_RESUME|JOB_REMOTE); 1522 job->flags |= JOB_CONTINUING; 1523 #else 1524 job->flags &= ~(JOB_REMIGRATE|JOB_RESUME); 1525 #endif 1526 } else { 1527 /* 1528 * Job cannot be restarted. Mark the table as full and 1529 * place the job back on the list of stopped jobs. 1530 */ 1531 if ( 1532 #ifdef REMOTE 1533 verboseRemigrates || 1534 #endif 1535 DEBUG(JOB)) { 1536 (void) fprintf(stdout, "*** holding\n"); 1537 (void) fflush(stdout); 1538 } 1539 (void)Lst_AtFront(stoppedJobs, (ClientData)job); 1540 return; 1541 } 1542 #ifdef REMOTE 1543 } else { 1544 /* 1545 * Clear out the remigrate and resume flags. Set the continuing 1546 * flag so we know later on that the process isn't exiting just 1547 * because of a signal. 1548 */ 1549 job->flags &= ~(JOB_REMIGRATE|JOB_RESUME); 1550 job->flags |= JOB_CONTINUING; 1551 job->rmtID = host; 1552 } 1553 #endif 1554 1555 (void)Lst_AtEnd(jobs, (ClientData)job); 1556 nJobs += 1; 1557 } else if (job->flags & JOB_RESTART) { 1558 /* 1559 * Set up the control arguments to the shell. This is based on the 1560 * flags set earlier for this job. If the JOB_IGNERR flag is clear, 1561 * the 'exit' flag of the commandShell is used to cause it to exit 1562 * upon receiving an error. If the JOB_SILENT flag is clear, the 1563 * 'echo' flag of the commandShell is used to get it to start echoing 1564 * as soon as it starts processing commands. 1565 */ 1566 char *argv[10]; 1567 1568 JobMakeArgv(job, argv); 1569 1570 if (DEBUG(JOB)) { 1571 (void) fprintf(stdout, "Restarting %s...", job->node->name); 1572 (void) fflush(stdout); 1573 } 1574 #ifdef REMOTE 1575 if ((job->node->type&OP_NOEXPORT) || 1576 (nLocal < maxLocal && runLocalFirst) 1577 # ifdef RMT_NO_EXEC 1578 || !Rmt_Export(shellPath, argv, job) 1579 # else 1580 || !Rmt_Begin(shellPath, argv, job->node) 1581 # endif 1582 #endif 1583 { 1584 if (((nLocal >= maxLocal) && !(job->flags & JOB_SPECIAL))) { 1585 /* 1586 * Can't be exported and not allowed to run locally -- put it 1587 * back on the hold queue and mark the table full 1588 */ 1589 if (DEBUG(JOB)) { 1590 (void) fprintf(stdout, "holding\n"); 1591 (void) fflush(stdout); 1592 } 1593 (void)Lst_AtFront(stoppedJobs, (ClientData)job); 1594 return; 1595 } else { 1596 /* 1597 * Job may be run locally. 1598 */ 1599 if (DEBUG(JOB)) { 1600 (void) fprintf(stdout, "running locally\n"); 1601 (void) fflush(stdout); 1602 } 1603 job->flags &= ~JOB_REMOTE; 1604 } 1605 } 1606 #ifdef REMOTE 1607 else { 1608 /* 1609 * Can be exported. Hooray! 1610 */ 1611 if (DEBUG(JOB)) { 1612 (void) fprintf(stdout, "exporting\n"); 1613 (void) fflush(stdout); 1614 } 1615 job->flags |= JOB_REMOTE; 1616 } 1617 #endif 1618 JobExec(job, argv); 1619 } else { 1620 /* 1621 * The job has stopped and needs to be restarted. Why it stopped, 1622 * we don't know... 1623 */ 1624 if (DEBUG(JOB)) { 1625 (void) fprintf(stdout, "Resuming %s...", job->node->name); 1626 (void) fflush(stdout); 1627 } 1628 if (((job->flags & JOB_REMOTE) || 1629 (nLocal < maxLocal) || 1630 #ifdef REMOTE 1631 (((job->flags & JOB_SPECIAL) && 1632 (job->node->type & OP_NOEXPORT)) && 1633 (maxLocal == 0))) && 1634 #else 1635 ((job->flags & JOB_SPECIAL) && 1636 (maxLocal == 0))) && 1637 #endif 1638 (nJobs != maxJobs)) 1639 { 1640 /* 1641 * If the job is remote, it's ok to resume it as long as the 1642 * maximum concurrency won't be exceeded. If it's local and 1643 * we haven't reached the local concurrency limit already (or the 1644 * job must be run locally and maxLocal is 0), it's also ok to 1645 * resume it. 1646 */ 1647 Boolean error; 1648 int status; 1649 1650 #ifdef RMT_WANTS_SIGNALS 1651 if (job->flags & JOB_REMOTE) { 1652 error = !Rmt_Signal(job, SIGCONT); 1653 } else 1654 #endif /* RMT_WANTS_SIGNALS */ 1655 error = (KILL(job->pid, SIGCONT) != 0); 1656 1657 if (!error) { 1658 /* 1659 * Make sure the user knows we've continued the beast and 1660 * actually put the thing in the job table. 1661 */ 1662 job->flags |= JOB_CONTINUING; 1663 status = W_STOPCODE(SIGCONT); 1664 JobFinish(job, &status); 1665 1666 job->flags &= ~(JOB_RESUME|JOB_CONTINUING); 1667 if (DEBUG(JOB)) { 1668 (void) fprintf(stdout, "done\n"); 1669 (void) fflush(stdout); 1670 } 1671 } else { 1672 Error("couldn't resume %s: %s", 1673 job->node->name, strerror(errno)); 1674 status = W_EXITCODE(1, 0); 1675 JobFinish(job, &status); 1676 } 1677 } else { 1678 /* 1679 * Job cannot be restarted. Mark the table as full and 1680 * place the job back on the list of stopped jobs. 1681 */ 1682 if (DEBUG(JOB)) { 1683 (void) fprintf(stdout, "table full\n"); 1684 (void) fflush(stdout); 1685 } 1686 (void) Lst_AtFront(stoppedJobs, (ClientData)job); 1687 } 1688 } 1689 } 1690 1691 /*- 1692 *----------------------------------------------------------------------- 1693 * JobStart -- 1694 * Start a target-creation process going for the target described 1695 * by the graph node gn. 1696 * 1697 * Results: 1698 * JOB_ERROR if there was an error in the commands, JOB_FINISHED 1699 * if there isn't actually anything left to do for the job and 1700 * JOB_RUNNING if the job has been started. 1701 * 1702 * Side Effects: 1703 * A new Job node is created and added to the list of running 1704 * jobs. PMake is forked and a child shell created. 1705 *----------------------------------------------------------------------- 1706 */ 1707 static int 1708 JobStart(gn, flags, previous) 1709 GNode *gn; /* target to create */ 1710 int flags; /* flags for the job to override normal ones. 1711 * e.g. JOB_SPECIAL or JOB_IGNDOTS */ 1712 Job *previous; /* The previous Job structure for this node, 1713 * if any. */ 1714 { 1715 register Job *job; /* new job descriptor */ 1716 char *argv[10]; /* Argument vector to shell */ 1717 Boolean cmdsOK; /* true if the nodes commands were all right */ 1718 Boolean local; /* Set true if the job was run locally */ 1719 Boolean noExec; /* Set true if we decide not to run the job */ 1720 int tfd; /* File descriptor to the temp file */ 1721 1722 if (previous != NULL) { 1723 previous->flags &= ~(JOB_FIRST|JOB_IGNERR|JOB_SILENT|JOB_REMOTE); 1724 job = previous; 1725 } else { 1726 job = (Job *) emalloc(sizeof(Job)); 1727 if (job == NULL) { 1728 Punt("JobStart out of memory"); 1729 } 1730 flags |= JOB_FIRST; 1731 } 1732 1733 job->node = gn; 1734 job->tailCmds = NILLNODE; 1735 1736 /* 1737 * Set the initial value of the flags for this job based on the global 1738 * ones and the node's attributes... Any flags supplied by the caller 1739 * are also added to the field. 1740 */ 1741 job->flags = 0; 1742 if (Targ_Ignore(gn)) { 1743 job->flags |= JOB_IGNERR; 1744 } 1745 if (Targ_Silent(gn)) { 1746 job->flags |= JOB_SILENT; 1747 } 1748 job->flags |= flags; 1749 1750 /* 1751 * Check the commands now so any attributes from .DEFAULT have a chance 1752 * to migrate to the node 1753 */ 1754 if (!compatMake && job->flags & JOB_FIRST) { 1755 cmdsOK = Job_CheckCommands(gn, Error); 1756 } else { 1757 cmdsOK = TRUE; 1758 } 1759 1760 #ifndef RMT_WILL_WATCH 1761 #ifndef USE_SELECT 1762 job->inPollfd = NULL; 1763 #endif 1764 #endif 1765 /* 1766 * If the -n flag wasn't given, we open up OUR (not the child's) 1767 * temporary file to stuff commands in it. The thing is rd/wr so we don't 1768 * need to reopen it to feed it to the shell. If the -n flag *was* given, 1769 * we just set the file to be stdout. Cute, huh? 1770 */ 1771 if ((gn->type & OP_MAKE) || (!noExecute && !touchFlag)) { 1772 /* 1773 * tfile is the name of a file into which all shell commands are 1774 * put. It is used over by removing it before the child shell is 1775 * executed. The XXXXXX in the string are replaced by the pid of 1776 * the make process in a 6-character field with leading zeroes. 1777 */ 1778 char tfile[sizeof(TMPPAT)]; 1779 /* 1780 * We're serious here, but if the commands were bogus, we're 1781 * also dead... 1782 */ 1783 if (!cmdsOK) { 1784 DieHorribly(); 1785 } 1786 1787 (void)strcpy(tfile, TMPPAT); 1788 if ((tfd = mkstemp(tfile)) == -1) 1789 Punt("Could not create temporary file %s", strerror(errno)); 1790 (void) eunlink(tfile); 1791 1792 job->cmdFILE = fdopen(tfd, "w+"); 1793 if (job->cmdFILE == NULL) { 1794 Punt("Could not fdopen %s", tfile); 1795 } 1796 (void) fcntl(FILENO(job->cmdFILE), F_SETFD, 1); 1797 /* 1798 * Send the commands to the command file, flush all its buffers then 1799 * rewind and remove the thing. 1800 */ 1801 noExec = FALSE; 1802 1803 /* 1804 * used to be backwards; replace when start doing multiple commands 1805 * per shell. 1806 */ 1807 if (compatMake) { 1808 /* 1809 * Be compatible: If this is the first time for this node, 1810 * verify its commands are ok and open the commands list for 1811 * sequential access by later invocations of JobStart. 1812 * Once that is done, we take the next command off the list 1813 * and print it to the command file. If the command was an 1814 * ellipsis, note that there's nothing more to execute. 1815 */ 1816 if ((job->flags&JOB_FIRST) && (Lst_Open(gn->commands) != SUCCESS)){ 1817 cmdsOK = FALSE; 1818 } else { 1819 LstNode ln = Lst_Next(gn->commands); 1820 1821 if ((ln == NILLNODE) || 1822 JobPrintCommand((ClientData) Lst_Datum(ln), 1823 (ClientData) job)) 1824 { 1825 noExec = TRUE; 1826 Lst_Close(gn->commands); 1827 } 1828 if (noExec && !(job->flags & JOB_FIRST)) { 1829 /* 1830 * If we're not going to execute anything, the job 1831 * is done and we need to close down the various 1832 * file descriptors we've opened for output, then 1833 * call JobDoOutput to catch the final characters or 1834 * send the file to the screen... Note that the i/o streams 1835 * are only open if this isn't the first job. 1836 * Note also that this could not be done in 1837 * Job_CatchChildren b/c it wasn't clear if there were 1838 * more commands to execute or not... 1839 */ 1840 JobClose(job); 1841 } 1842 } 1843 } else { 1844 /* 1845 * We can do all the commands at once. hooray for sanity 1846 */ 1847 numCommands = 0; 1848 Lst_ForEach(gn->commands, JobPrintCommand, (ClientData)job); 1849 1850 /* 1851 * If we didn't print out any commands to the shell script, 1852 * there's not much point in executing the shell, is there? 1853 */ 1854 if (numCommands == 0) { 1855 noExec = TRUE; 1856 } 1857 } 1858 } else if (noExecute) { 1859 /* 1860 * Not executing anything -- just print all the commands to stdout 1861 * in one fell swoop. This will still set up job->tailCmds correctly. 1862 */ 1863 if (lastNode != gn) { 1864 MESSAGE(stdout, gn); 1865 lastNode = gn; 1866 } 1867 job->cmdFILE = stdout; 1868 /* 1869 * Only print the commands if they're ok, but don't die if they're 1870 * not -- just let the user know they're bad and keep going. It 1871 * doesn't do any harm in this case and may do some good. 1872 */ 1873 if (cmdsOK) { 1874 Lst_ForEach(gn->commands, JobPrintCommand, (ClientData)job); 1875 } 1876 /* 1877 * Don't execute the shell, thank you. 1878 */ 1879 noExec = TRUE; 1880 } else { 1881 /* 1882 * Just touch the target and note that no shell should be executed. 1883 * Set cmdFILE to stdout to make life easier. Check the commands, too, 1884 * but don't die if they're no good -- it does no harm to keep working 1885 * up the graph. 1886 */ 1887 job->cmdFILE = stdout; 1888 Job_Touch(gn, job->flags&JOB_SILENT); 1889 noExec = TRUE; 1890 } 1891 1892 /* 1893 * If we're not supposed to execute a shell, don't. 1894 */ 1895 if (noExec) { 1896 /* 1897 * Unlink and close the command file if we opened one 1898 */ 1899 if (job->cmdFILE != stdout) { 1900 if (job->cmdFILE != NULL) { 1901 (void) fclose(job->cmdFILE); 1902 job->cmdFILE = NULL; 1903 } 1904 } else { 1905 (void) fflush(stdout); 1906 } 1907 1908 /* 1909 * We only want to work our way up the graph if we aren't here because 1910 * the commands for the job were no good. 1911 */ 1912 if (cmdsOK) { 1913 if (aborting == 0) { 1914 if (job->tailCmds != NILLNODE) { 1915 Lst_ForEachFrom(job->node->commands, job->tailCmds, 1916 JobSaveCommand, 1917 (ClientData)job->node); 1918 } 1919 Make_Update(job->node); 1920 } 1921 free((Address)job); 1922 return(JOB_FINISHED); 1923 } else { 1924 free((Address)job); 1925 return(JOB_ERROR); 1926 } 1927 } else { 1928 (void) fflush(job->cmdFILE); 1929 } 1930 1931 /* 1932 * Set up the control arguments to the shell. This is based on the flags 1933 * set earlier for this job. 1934 */ 1935 JobMakeArgv(job, argv); 1936 1937 /* 1938 * If we're using pipes to catch output, create the pipe by which we'll 1939 * get the shell's output. If we're using files, print out that we're 1940 * starting a job and then set up its temporary-file name. 1941 */ 1942 if (!compatMake || (job->flags & JOB_FIRST)) { 1943 if (usePipes) { 1944 int fd[2]; 1945 if (pipe(fd) == -1) 1946 Punt("Cannot create pipe: %s", strerror(errno)); 1947 job->inPipe = fd[0]; 1948 #ifdef USE_SELECT 1949 if (job->inPipe >= FD_SETSIZE) 1950 Punt("Ran out of fd_set slots; " 1951 "recompile with a larger FD_SETSIZE."); 1952 #endif 1953 job->outPipe = fd[1]; 1954 (void) fcntl(job->inPipe, F_SETFD, 1); 1955 (void) fcntl(job->outPipe, F_SETFD, 1); 1956 } else { 1957 (void) fprintf(stdout, "Remaking `%s'\n", gn->name); 1958 (void) fflush(stdout); 1959 (void) strcpy(job->outFile, TMPPAT); 1960 job->outFd = mkstemp(job->outFile); 1961 (void) fcntl(job->outFd, F_SETFD, 1); 1962 } 1963 } 1964 1965 #ifdef REMOTE 1966 if (!(gn->type & OP_NOEXPORT) && !(runLocalFirst && nLocal < maxLocal)) { 1967 #ifdef RMT_NO_EXEC 1968 local = !Rmt_Export(shellPath, argv, job); 1969 #else 1970 local = !Rmt_Begin(shellPath, argv, job->node); 1971 #endif /* RMT_NO_EXEC */ 1972 if (!local) { 1973 job->flags |= JOB_REMOTE; 1974 } 1975 } else 1976 #endif 1977 local = TRUE; 1978 1979 if (local && (((nLocal >= maxLocal) && 1980 !(job->flags & JOB_SPECIAL) && 1981 #ifdef REMOTE 1982 (!(gn->type & OP_NOEXPORT) || (maxLocal != 0)) 1983 #else 1984 (maxLocal != 0) 1985 #endif 1986 ))) 1987 { 1988 /* 1989 * The job can only be run locally, but we've hit the limit of 1990 * local concurrency, so put the job on hold until some other job 1991 * finishes. Note that the special jobs (.BEGIN, .INTERRUPT and .END) 1992 * may be run locally even when the local limit has been reached 1993 * (e.g. when maxLocal == 0), though they will be exported if at 1994 * all possible. In addition, any target marked with .NOEXPORT will 1995 * be run locally if maxLocal is 0. 1996 */ 1997 job->flags |= JOB_RESTART; 1998 (void) Lst_AtEnd(stoppedJobs, (ClientData)job); 1999 } else { 2000 JobExec(job, argv); 2001 } 2002 return(JOB_RUNNING); 2003 } 2004 2005 static char * 2006 JobOutput(job, cp, endp, msg) 2007 register Job *job; 2008 register char *cp, *endp; 2009 int msg; 2010 { 2011 register char *ecp; 2012 2013 if (commandShell->noPrint) { 2014 ecp = Str_FindSubstring(cp, commandShell->noPrint); 2015 while (ecp != NULL) { 2016 if (cp != ecp) { 2017 *ecp = '\0'; 2018 if (msg && job->node != lastNode) { 2019 MESSAGE(stdout, job->node); 2020 lastNode = job->node; 2021 } 2022 /* 2023 * The only way there wouldn't be a newline after 2024 * this line is if it were the last in the buffer. 2025 * however, since the non-printable comes after it, 2026 * there must be a newline, so we don't print one. 2027 */ 2028 (void) fprintf(stdout, "%s", cp); 2029 (void) fflush(stdout); 2030 } 2031 cp = ecp + commandShell->noPLen; 2032 if (cp != endp) { 2033 /* 2034 * Still more to print, look again after skipping 2035 * the whitespace following the non-printable 2036 * command.... 2037 */ 2038 cp++; 2039 while (*cp == ' ' || *cp == '\t' || *cp == '\n') { 2040 cp++; 2041 } 2042 ecp = Str_FindSubstring(cp, commandShell->noPrint); 2043 } else { 2044 return cp; 2045 } 2046 } 2047 } 2048 return cp; 2049 } 2050 2051 /*- 2052 *----------------------------------------------------------------------- 2053 * JobDoOutput -- 2054 * This function is called at different times depending on 2055 * whether the user has specified that output is to be collected 2056 * via pipes or temporary files. In the former case, we are called 2057 * whenever there is something to read on the pipe. We collect more 2058 * output from the given job and store it in the job's outBuf. If 2059 * this makes up a line, we print it tagged by the job's identifier, 2060 * as necessary. 2061 * If output has been collected in a temporary file, we open the 2062 * file and read it line by line, transfering it to our own 2063 * output channel until the file is empty. At which point we 2064 * remove the temporary file. 2065 * In both cases, however, we keep our figurative eye out for the 2066 * 'noPrint' line for the shell from which the output came. If 2067 * we recognize a line, we don't print it. If the command is not 2068 * alone on the line (the character after it is not \0 or \n), we 2069 * do print whatever follows it. 2070 * 2071 * Results: 2072 * None 2073 * 2074 * Side Effects: 2075 * curPos may be shifted as may the contents of outBuf. 2076 *----------------------------------------------------------------------- 2077 */ 2078 STATIC void 2079 JobDoOutput(job, finish) 2080 register Job *job; /* the job whose output needs printing */ 2081 Boolean finish; /* TRUE if this is the last time we'll be 2082 * called for this job */ 2083 { 2084 Boolean gotNL = FALSE; /* true if got a newline */ 2085 Boolean fbuf; /* true if our buffer filled up */ 2086 register int nr; /* number of bytes read */ 2087 register int i; /* auxiliary index into outBuf */ 2088 register int max; /* limit for i (end of current data) */ 2089 int nRead; /* (Temporary) number of bytes read */ 2090 2091 FILE *oFILE; /* Stream pointer to shell's output file */ 2092 char inLine[132]; 2093 2094 2095 if (usePipes) { 2096 /* 2097 * Read as many bytes as will fit in the buffer. 2098 */ 2099 end_loop: 2100 gotNL = FALSE; 2101 fbuf = FALSE; 2102 2103 nRead = read(job->inPipe, &job->outBuf[job->curPos], 2104 JOB_BUFSIZE - job->curPos); 2105 if (nRead < 0) { 2106 if (DEBUG(JOB)) { 2107 perror("JobDoOutput(piperead)"); 2108 } 2109 nr = 0; 2110 } else { 2111 nr = nRead; 2112 } 2113 2114 /* 2115 * If we hit the end-of-file (the job is dead), we must flush its 2116 * remaining output, so pretend we read a newline if there's any 2117 * output remaining in the buffer. 2118 * Also clear the 'finish' flag so we stop looping. 2119 */ 2120 if ((nr == 0) && (job->curPos != 0)) { 2121 job->outBuf[job->curPos] = '\n'; 2122 nr = 1; 2123 finish = FALSE; 2124 } else if (nr == 0) { 2125 finish = FALSE; 2126 } 2127 2128 /* 2129 * Look for the last newline in the bytes we just got. If there is 2130 * one, break out of the loop with 'i' as its index and gotNL set 2131 * TRUE. 2132 */ 2133 max = job->curPos + nr; 2134 for (i = job->curPos + nr - 1; i >= job->curPos; i--) { 2135 if (job->outBuf[i] == '\n') { 2136 gotNL = TRUE; 2137 break; 2138 } else if (job->outBuf[i] == '\0') { 2139 /* 2140 * Why? 2141 */ 2142 job->outBuf[i] = ' '; 2143 } 2144 } 2145 2146 if (!gotNL) { 2147 job->curPos += nr; 2148 if (job->curPos == JOB_BUFSIZE) { 2149 /* 2150 * If we've run out of buffer space, we have no choice 2151 * but to print the stuff. sigh. 2152 */ 2153 fbuf = TRUE; 2154 i = job->curPos; 2155 } 2156 } 2157 if (gotNL || fbuf) { 2158 /* 2159 * Need to send the output to the screen. Null terminate it 2160 * first, overwriting the newline character if there was one. 2161 * So long as the line isn't one we should filter (according 2162 * to the shell description), we print the line, preceeded 2163 * by a target banner if this target isn't the same as the 2164 * one for which we last printed something. 2165 * The rest of the data in the buffer are then shifted down 2166 * to the start of the buffer and curPos is set accordingly. 2167 */ 2168 job->outBuf[i] = '\0'; 2169 if (i >= job->curPos) { 2170 char *cp; 2171 2172 cp = JobOutput(job, job->outBuf, &job->outBuf[i], FALSE); 2173 2174 /* 2175 * There's still more in that thar buffer. This time, though, 2176 * we know there's no newline at the end, so we add one of 2177 * our own free will. 2178 */ 2179 if (*cp != '\0') { 2180 if (job->node != lastNode) { 2181 MESSAGE(stdout, job->node); 2182 lastNode = job->node; 2183 } 2184 (void) fprintf(stdout, "%s%s", cp, gotNL ? "\n" : ""); 2185 (void) fflush(stdout); 2186 } 2187 } 2188 if (i < max - 1) { 2189 /* shift the remaining characters down */ 2190 (void) memcpy(job->outBuf, &job->outBuf[i + 1], max - (i + 1)); 2191 job->curPos = max - (i + 1); 2192 2193 } else { 2194 /* 2195 * We have written everything out, so we just start over 2196 * from the start of the buffer. No copying. No nothing. 2197 */ 2198 job->curPos = 0; 2199 } 2200 } 2201 if (finish) { 2202 /* 2203 * If the finish flag is true, we must loop until we hit 2204 * end-of-file on the pipe. This is guaranteed to happen 2205 * eventually since the other end of the pipe is now closed 2206 * (we closed it explicitly and the child has exited). When 2207 * we do get an EOF, finish will be set FALSE and we'll fall 2208 * through and out. 2209 */ 2210 goto end_loop; 2211 } 2212 } else { 2213 /* 2214 * We've been called to retrieve the output of the job from the 2215 * temporary file where it's been squirreled away. This consists of 2216 * opening the file, reading the output line by line, being sure not 2217 * to print the noPrint line for the shell we used, then close and 2218 * remove the temporary file. Very simple. 2219 * 2220 * Change to read in blocks and do FindSubString type things as for 2221 * pipes? That would allow for "@echo -n..." 2222 */ 2223 oFILE = fopen(job->outFile, "r"); 2224 if (oFILE != NULL) { 2225 (void) fprintf(stdout, "Results of making %s:\n", job->node->name); 2226 (void) fflush(stdout); 2227 while (fgets(inLine, sizeof(inLine), oFILE) != NULL) { 2228 register char *cp, *endp, *oendp; 2229 2230 cp = inLine; 2231 oendp = endp = inLine + strlen(inLine); 2232 if (endp[-1] == '\n') { 2233 *--endp = '\0'; 2234 } 2235 cp = JobOutput(job, inLine, endp, FALSE); 2236 2237 /* 2238 * There's still more in that thar buffer. This time, though, 2239 * we know there's no newline at the end, so we add one of 2240 * our own free will. 2241 */ 2242 (void) fprintf(stdout, "%s", cp); 2243 (void) fflush(stdout); 2244 if (endp != oendp) { 2245 (void) fprintf(stdout, "\n"); 2246 (void) fflush(stdout); 2247 } 2248 } 2249 (void) fclose(oFILE); 2250 (void) eunlink(job->outFile); 2251 } else { 2252 Punt("Cannot open `%s'", job->outFile); 2253 } 2254 } 2255 } 2256 2257 /*- 2258 *----------------------------------------------------------------------- 2259 * Job_CatchChildren -- 2260 * Handle the exit of a child. Called from Make_Make. 2261 * 2262 * Results: 2263 * none. 2264 * 2265 * Side Effects: 2266 * The job descriptor is removed from the list of children. 2267 * 2268 * Notes: 2269 * We do waits, blocking or not, according to the wisdom of our 2270 * caller, until there are no more children to report. For each 2271 * job, call JobFinish to finish things off. This will take care of 2272 * putting jobs on the stoppedJobs queue. 2273 * 2274 *----------------------------------------------------------------------- 2275 */ 2276 void 2277 Job_CatchChildren(block) 2278 Boolean block; /* TRUE if should block on the wait. */ 2279 { 2280 int pid; /* pid of dead child */ 2281 register Job *job; /* job descriptor for dead child */ 2282 LstNode jnode; /* list element for finding job */ 2283 int status; /* Exit/termination status */ 2284 2285 /* 2286 * Don't even bother if we know there's no one around. 2287 */ 2288 if (nLocal == 0) { 2289 return; 2290 } 2291 2292 while ((pid = waitpid((pid_t) -1, &status, 2293 (block?0:WNOHANG)|WUNTRACED)) > 0) 2294 { 2295 if (DEBUG(JOB)) { 2296 (void) fprintf(stdout, "Process %d exited or stopped %x.\n", pid, 2297 status); 2298 (void) fflush(stdout); 2299 } 2300 2301 2302 jnode = Lst_Find(jobs, (ClientData)&pid, JobCmpPid); 2303 2304 if (jnode == NILLNODE) { 2305 if (WIFSTOPPED(status) && (WSTOPSIG(status) == SIGCONT)) { 2306 jnode = Lst_Find(stoppedJobs, (ClientData) &pid, JobCmpPid); 2307 if (jnode == NILLNODE) { 2308 Error("Resumed child (%d) not in table", pid); 2309 continue; 2310 } 2311 job = (Job *)Lst_Datum(jnode); 2312 (void) Lst_Remove(stoppedJobs, jnode); 2313 } else { 2314 Error("Child (%d) not in table?", pid); 2315 continue; 2316 } 2317 } else { 2318 job = (Job *) Lst_Datum(jnode); 2319 (void) Lst_Remove(jobs, jnode); 2320 nJobs -= 1; 2321 #ifdef REMOTE 2322 if (!(job->flags & JOB_REMOTE)) { 2323 if (DEBUG(JOB)) { 2324 (void) fprintf(stdout, 2325 "Job queue has one fewer local process.\n"); 2326 (void) fflush(stdout); 2327 } 2328 nLocal -= 1; 2329 } 2330 #else 2331 nLocal -= 1; 2332 #endif 2333 } 2334 2335 JobFinish(job, &status); 2336 } 2337 } 2338 2339 /*- 2340 *----------------------------------------------------------------------- 2341 * Job_CatchOutput -- 2342 * Catch the output from our children, if we're using 2343 * pipes do so. Otherwise just block time until we get a 2344 * signal (most likely a SIGCHLD) since there's no point in 2345 * just spinning when there's nothing to do and the reaping 2346 * of a child can wait for a while. 2347 * 2348 * Results: 2349 * None 2350 * 2351 * Side Effects: 2352 * Output is read from pipes if we're piping. 2353 * ----------------------------------------------------------------------- 2354 */ 2355 void 2356 Job_CatchOutput() 2357 { 2358 int nready; 2359 register LstNode ln; 2360 register Job *job; 2361 #ifdef RMT_WILL_WATCH 2362 int pnJobs; /* Previous nJobs */ 2363 #endif 2364 2365 (void) fflush(stdout); 2366 Job_TokenFlush(); 2367 #ifdef RMT_WILL_WATCH 2368 pnJobs = nJobs; 2369 2370 /* 2371 * It is possible for us to be called with nJobs equal to 0. This happens 2372 * if all the jobs finish and a job that is stopped cannot be run 2373 * locally (eg if maxLocal is 0) and cannot be exported. The job will 2374 * be placed back on the stoppedJobs queue, Job_Empty() will return false, 2375 * Make_Run will call us again when there's nothing for which to wait. 2376 * nJobs never changes, so we loop forever. Hence the check. It could 2377 * be argued that we should sleep for a bit so as not to swamp the 2378 * exportation system with requests. Perhaps we should. 2379 * 2380 * NOTE: IT IS THE RESPONSIBILITY OF Rmt_Wait TO CALL Job_CatchChildren 2381 * IN A TIMELY FASHION TO CATCH ANY LOCALLY RUNNING JOBS THAT EXIT. 2382 * It may use the variable nLocal to determine if it needs to call 2383 * Job_CatchChildren (if nLocal is 0, there's nothing for which to 2384 * wait...) 2385 */ 2386 while (nJobs != 0 && pnJobs == nJobs) { 2387 Rmt_Wait(); 2388 } 2389 #else 2390 if (usePipes) { 2391 #ifdef USE_SELECT 2392 struct timeval timeout; 2393 fd_set readfds; 2394 2395 readfds = outputs; 2396 timeout.tv_sec = SEL_SEC; 2397 timeout.tv_usec = SEL_USEC; 2398 2399 if ((nready = select(FD_SETSIZE, &readfds, (fd_set *) 0, 2400 (fd_set *) 0, &timeout)) <= 0) 2401 return; 2402 #else 2403 if ((nready = poll((wantToken ? fds : (fds + 1)), 2404 (wantToken ? nfds : (nfds - 1)), POLL_MSEC)) <= 0) 2405 return; 2406 #endif 2407 else { 2408 if (Lst_Open(jobs) == FAILURE) { 2409 Punt("Cannot open job table"); 2410 } 2411 while (nready && (ln = Lst_Next(jobs)) != NILLNODE) { 2412 job = (Job *) Lst_Datum(ln); 2413 #ifdef USE_SELECT 2414 if (FD_ISSET(job->inPipe, &readfds)) 2415 #else 2416 if (readyfd(job)) 2417 #endif 2418 { 2419 JobDoOutput(job, FALSE); 2420 nready -= 1; 2421 } 2422 2423 } 2424 Lst_Close(jobs); 2425 } 2426 } 2427 #endif /* RMT_WILL_WATCH */ 2428 } 2429 2430 /*- 2431 *----------------------------------------------------------------------- 2432 * Job_Make -- 2433 * Start the creation of a target. Basically a front-end for 2434 * JobStart used by the Make module. 2435 * 2436 * Results: 2437 * None. 2438 * 2439 * Side Effects: 2440 * Another job is started. 2441 * 2442 *----------------------------------------------------------------------- 2443 */ 2444 void 2445 Job_Make(gn) 2446 GNode *gn; 2447 { 2448 (void) JobStart(gn, 0, NULL); 2449 } 2450 2451 /*- 2452 *----------------------------------------------------------------------- 2453 * Job_Init -- 2454 * Initialize the process module 2455 * 2456 * Results: 2457 * none 2458 * 2459 * Side Effects: 2460 * lists and counters are initialized 2461 *----------------------------------------------------------------------- 2462 */ 2463 void 2464 Job_Init(maxproc, maxlocal) 2465 int maxproc; /* the greatest number of jobs which may be 2466 * running at one time */ 2467 int maxlocal; /* the greatest number of local jobs which may 2468 * be running at once. */ 2469 { 2470 GNode *begin; /* node for commands to do at the very start */ 2471 2472 jobs = Lst_Init(FALSE); 2473 stoppedJobs = Lst_Init(FALSE); 2474 maxJobs = maxproc; 2475 maxLocal = maxlocal; 2476 nJobs = 0; 2477 nLocal = 0; 2478 wantToken = FALSE; 2479 2480 aborting = 0; 2481 errors = 0; 2482 2483 lastNode = NILGNODE; 2484 2485 if (maxJobs == 1 2486 #ifdef REMOTE 2487 || noMessages 2488 #endif 2489 ) { 2490 /* 2491 * If only one job can run at a time, there's no need for a banner, 2492 * is there? 2493 */ 2494 targFmt = ""; 2495 } else { 2496 targFmt = TARG_FMT; 2497 } 2498 2499 if (shellPath == NULL) { 2500 /* 2501 * The user didn't specify a shell to use, so we are using the 2502 * default one... Both the absolute path and the last component 2503 * must be set. The last component is taken from the 'name' field 2504 * of the default shell description pointed-to by commandShell. 2505 * All default shells are located in _PATH_DEFSHELLDIR. 2506 */ 2507 shellName = commandShell->name; 2508 shellPath = str_concat(_PATH_DEFSHELLDIR, shellName, STR_ADDSLASH); 2509 } 2510 2511 if (commandShell->exit == NULL) { 2512 commandShell->exit = ""; 2513 } 2514 if (commandShell->echo == NULL) { 2515 commandShell->echo = ""; 2516 } 2517 2518 /* 2519 * Catch the four signals that POSIX specifies if they aren't ignored. 2520 * JobPassSig will take care of calling JobInterrupt if appropriate. 2521 */ 2522 if (signal(SIGINT, SIG_IGN) != SIG_IGN) { 2523 (void) signal(SIGINT, JobPassSig); 2524 } 2525 if (signal(SIGHUP, SIG_IGN) != SIG_IGN) { 2526 (void) signal(SIGHUP, JobPassSig); 2527 } 2528 if (signal(SIGQUIT, SIG_IGN) != SIG_IGN) { 2529 (void) signal(SIGQUIT, JobPassSig); 2530 } 2531 if (signal(SIGTERM, SIG_IGN) != SIG_IGN) { 2532 (void) signal(SIGTERM, JobPassSig); 2533 } 2534 /* 2535 * Install a NOOP SIGCHLD handler so we are woken up if we're blocked. 2536 */ 2537 signal(SIGCHLD, JobIgnoreSig); 2538 2539 /* 2540 * There are additional signals that need to be caught and passed if 2541 * either the export system wants to be told directly of signals or if 2542 * we're giving each job its own process group (since then it won't get 2543 * signals from the terminal driver as we own the terminal) 2544 */ 2545 #if defined(RMT_WANTS_SIGNALS) || defined(USE_PGRP) 2546 if (signal(SIGTSTP, SIG_IGN) != SIG_IGN) { 2547 (void) signal(SIGTSTP, JobPassSig); 2548 } 2549 if (signal(SIGTTOU, SIG_IGN) != SIG_IGN) { 2550 (void) signal(SIGTTOU, JobPassSig); 2551 } 2552 if (signal(SIGTTIN, SIG_IGN) != SIG_IGN) { 2553 (void) signal(SIGTTIN, JobPassSig); 2554 } 2555 if (signal(SIGWINCH, SIG_IGN) != SIG_IGN) { 2556 (void) signal(SIGWINCH, JobPassSig); 2557 } 2558 #endif 2559 2560 begin = Targ_FindNode(".BEGIN", TARG_NOCREATE); 2561 2562 if (begin != NILGNODE) { 2563 JobStart(begin, JOB_SPECIAL, (Job *)0); 2564 while (nJobs) { 2565 Job_CatchOutput(); 2566 #ifndef RMT_WILL_WATCH 2567 Job_CatchChildren(!usePipes); 2568 #endif /* RMT_WILL_WATCH */ 2569 } 2570 } 2571 postCommands = Targ_FindNode(".END", TARG_CREATE); 2572 } 2573 2574 /*- 2575 *----------------------------------------------------------------------- 2576 * Job_Empty -- 2577 * See if the job table is empty. Because the local concurrency may 2578 * be set to 0, it is possible for the job table to become empty, 2579 * while the list of stoppedJobs remains non-empty. In such a case, 2580 * we want to restart as many jobs as we can. 2581 * 2582 * Results: 2583 * TRUE if it is. FALSE if it ain't. 2584 * 2585 * Side Effects: 2586 * None. 2587 * 2588 * ----------------------------------------------------------------------- 2589 */ 2590 Boolean 2591 Job_Empty() 2592 { 2593 if (nJobs == 0) { 2594 if (!Lst_IsEmpty(stoppedJobs) && !aborting) { 2595 /* 2596 * The job table is obviously not full if it has no jobs in 2597 * it...Try and restart the stopped jobs. 2598 */ 2599 JobRestartJobs(); 2600 return(FALSE); 2601 } else { 2602 return(TRUE); 2603 } 2604 } else { 2605 return(FALSE); 2606 } 2607 } 2608 2609 /*- 2610 *----------------------------------------------------------------------- 2611 * JobMatchShell -- 2612 * Find a matching shell in 'shells' given its final component. 2613 * 2614 * Results: 2615 * A pointer to the Shell structure. 2616 * 2617 * Side Effects: 2618 * None. 2619 * 2620 *----------------------------------------------------------------------- 2621 */ 2622 static Shell * 2623 JobMatchShell(name) 2624 char *name; /* Final component of shell path */ 2625 { 2626 register Shell *sh; /* Pointer into shells table */ 2627 Shell *match; /* Longest-matching shell */ 2628 register char *cp1, 2629 *cp2; 2630 char *eoname; 2631 2632 eoname = name + strlen(name); 2633 2634 match = NULL; 2635 2636 for (sh = shells; sh->name != NULL; sh++) { 2637 for (cp1 = eoname - strlen(sh->name), cp2 = sh->name; 2638 *cp1 != '\0' && *cp1 == *cp2; 2639 cp1++, cp2++) { 2640 continue; 2641 } 2642 if (*cp1 != *cp2) { 2643 continue; 2644 } else if (match == NULL || strlen(match->name) < strlen(sh->name)) { 2645 match = sh; 2646 } 2647 } 2648 return(match == NULL ? sh : match); 2649 } 2650 2651 /*- 2652 *----------------------------------------------------------------------- 2653 * Job_ParseShell -- 2654 * Parse a shell specification and set up commandShell, shellPath 2655 * and shellName appropriately. 2656 * 2657 * Results: 2658 * FAILURE if the specification was incorrect. 2659 * 2660 * Side Effects: 2661 * commandShell points to a Shell structure (either predefined or 2662 * created from the shell spec), shellPath is the full path of the 2663 * shell described by commandShell, while shellName is just the 2664 * final component of shellPath. 2665 * 2666 * Notes: 2667 * A shell specification consists of a .SHELL target, with dependency 2668 * operator, followed by a series of blank-separated words. Double 2669 * quotes can be used to use blanks in words. A backslash escapes 2670 * anything (most notably a double-quote and a space) and 2671 * provides the functionality it does in C. Each word consists of 2672 * keyword and value separated by an equal sign. There should be no 2673 * unnecessary spaces in the word. The keywords are as follows: 2674 * name Name of shell. 2675 * path Location of shell. Overrides "name" if given 2676 * quiet Command to turn off echoing. 2677 * echo Command to turn echoing on 2678 * filter Result of turning off echoing that shouldn't be 2679 * printed. 2680 * echoFlag Flag to turn echoing on at the start 2681 * errFlag Flag to turn error checking on at the start 2682 * hasErrCtl True if shell has error checking control 2683 * check Command to turn on error checking if hasErrCtl 2684 * is TRUE or template of command to echo a command 2685 * for which error checking is off if hasErrCtl is 2686 * FALSE. 2687 * ignore Command to turn off error checking if hasErrCtl 2688 * is TRUE or template of command to execute a 2689 * command so as to ignore any errors it returns if 2690 * hasErrCtl is FALSE. 2691 * 2692 *----------------------------------------------------------------------- 2693 */ 2694 ReturnStatus 2695 Job_ParseShell(line) 2696 char *line; /* The shell spec */ 2697 { 2698 char **words; 2699 int wordCount; 2700 register char **argv; 2701 register int argc; 2702 char *path; 2703 Shell newShell; 2704 Boolean fullSpec = FALSE; 2705 2706 while (isspace((unsigned char)*line)) { 2707 line++; 2708 } 2709 2710 if (shellArgv) 2711 free(shellArgv); 2712 2713 words = brk_string(line, &wordCount, TRUE, &shellArgv); 2714 2715 memset((Address)&newShell, 0, sizeof(newShell)); 2716 2717 /* 2718 * Parse the specification by keyword 2719 */ 2720 for (path = NULL, argc = wordCount - 1, argv = words; 2721 argc != 0; 2722 argc--, argv++) { 2723 if (strncmp(*argv, "path=", 5) == 0) { 2724 path = &argv[0][5]; 2725 } else if (strncmp(*argv, "name=", 5) == 0) { 2726 newShell.name = &argv[0][5]; 2727 } else { 2728 if (strncmp(*argv, "quiet=", 6) == 0) { 2729 newShell.echoOff = &argv[0][6]; 2730 } else if (strncmp(*argv, "echo=", 5) == 0) { 2731 newShell.echoOn = &argv[0][5]; 2732 } else if (strncmp(*argv, "filter=", 7) == 0) { 2733 newShell.noPrint = &argv[0][7]; 2734 newShell.noPLen = strlen(newShell.noPrint); 2735 } else if (strncmp(*argv, "echoFlag=", 9) == 0) { 2736 newShell.echo = &argv[0][9]; 2737 } else if (strncmp(*argv, "errFlag=", 8) == 0) { 2738 newShell.exit = &argv[0][8]; 2739 } else if (strncmp(*argv, "hasErrCtl=", 10) == 0) { 2740 char c = argv[0][10]; 2741 newShell.hasErrCtl = !((c != 'Y') && (c != 'y') && 2742 (c != 'T') && (c != 't')); 2743 } else if (strncmp(*argv, "check=", 6) == 0) { 2744 newShell.errCheck = &argv[0][6]; 2745 } else if (strncmp(*argv, "ignore=", 7) == 0) { 2746 newShell.ignErr = &argv[0][7]; 2747 } else { 2748 Parse_Error(PARSE_FATAL, "Unknown keyword \"%s\"", 2749 *argv); 2750 free(words); 2751 return(FAILURE); 2752 } 2753 fullSpec = TRUE; 2754 } 2755 } 2756 2757 if (path == NULL) { 2758 /* 2759 * If no path was given, the user wants one of the pre-defined shells, 2760 * yes? So we find the one s/he wants with the help of JobMatchShell 2761 * and set things up the right way. shellPath will be set up by 2762 * Job_Init. 2763 */ 2764 if (newShell.name == NULL) { 2765 Parse_Error(PARSE_FATAL, "Neither path nor name specified"); 2766 return(FAILURE); 2767 } else { 2768 commandShell = JobMatchShell(newShell.name); 2769 shellName = newShell.name; 2770 } 2771 } else { 2772 /* 2773 * The user provided a path. If s/he gave nothing else (fullSpec is 2774 * FALSE), try and find a matching shell in the ones we know of. 2775 * Else we just take the specification at its word and copy it 2776 * to a new location. In either case, we need to record the 2777 * path the user gave for the shell. 2778 */ 2779 shellPath = path; 2780 path = strrchr(path, '/'); 2781 if (path == NULL) { 2782 path = shellPath; 2783 } else { 2784 path += 1; 2785 } 2786 if (newShell.name != NULL) { 2787 shellName = newShell.name; 2788 } else { 2789 shellName = path; 2790 } 2791 if (!fullSpec) { 2792 commandShell = JobMatchShell(shellName); 2793 } else { 2794 commandShell = (Shell *) emalloc(sizeof(Shell)); 2795 *commandShell = newShell; 2796 } 2797 } 2798 2799 if (commandShell->echoOn && commandShell->echoOff) { 2800 commandShell->hasEchoCtl = TRUE; 2801 } 2802 2803 if (!commandShell->hasErrCtl) { 2804 if (commandShell->errCheck == NULL) { 2805 commandShell->errCheck = ""; 2806 } 2807 if (commandShell->ignErr == NULL) { 2808 commandShell->ignErr = "%s\n"; 2809 } 2810 } 2811 2812 /* 2813 * Do not free up the words themselves, since they might be in use by the 2814 * shell specification. 2815 */ 2816 free(words); 2817 return SUCCESS; 2818 } 2819 2820 /*- 2821 *----------------------------------------------------------------------- 2822 * JobInterrupt -- 2823 * Handle the receipt of an interrupt. 2824 * 2825 * Results: 2826 * None 2827 * 2828 * Side Effects: 2829 * All children are killed. Another job will be started if the 2830 * .INTERRUPT target was given. 2831 *----------------------------------------------------------------------- 2832 */ 2833 static void 2834 JobInterrupt(runINTERRUPT, signo) 2835 int runINTERRUPT; /* Non-zero if commands for the .INTERRUPT 2836 * target should be executed */ 2837 int signo; /* signal received */ 2838 { 2839 LstNode ln; /* element in job table */ 2840 Job *job; /* job descriptor in that element */ 2841 GNode *interrupt; /* the node describing the .INTERRUPT target */ 2842 2843 aborting = ABORT_INTERRUPT; 2844 2845 (void) Lst_Open(jobs); 2846 while ((ln = Lst_Next(jobs)) != NILLNODE) { 2847 job = (Job *) Lst_Datum(ln); 2848 2849 if (!Targ_Precious(job->node)) { 2850 char *file = (job->node->path == NULL ? 2851 job->node->name : 2852 job->node->path); 2853 if (!noExecute && eunlink(file) != -1) { 2854 Error("*** %s removed", file); 2855 } 2856 } 2857 #ifdef RMT_WANTS_SIGNALS 2858 if (job->flags & JOB_REMOTE) { 2859 /* 2860 * If job is remote, let the Rmt module do the killing. 2861 */ 2862 if (!Rmt_Signal(job, signo)) { 2863 /* 2864 * If couldn't kill the thing, finish it out now with an 2865 * error code, since no exit report will come in likely. 2866 */ 2867 int status; 2868 2869 status.w_status = 0; 2870 status.w_retcode = 1; 2871 JobFinish(job, &status); 2872 } 2873 } else if (job->pid) { 2874 KILL(job->pid, signo); 2875 } 2876 #else 2877 if (job->pid) { 2878 if (DEBUG(JOB)) { 2879 (void) fprintf(stdout, 2880 "JobInterrupt passing signal to child %d.\n", 2881 job->pid); 2882 (void) fflush(stdout); 2883 } 2884 KILL(job->pid, signo); 2885 } 2886 #endif /* RMT_WANTS_SIGNALS */ 2887 } 2888 2889 #ifdef REMOTE 2890 (void)Lst_Open(stoppedJobs); 2891 while ((ln = Lst_Next(stoppedJobs)) != NILLNODE) { 2892 job = (Job *) Lst_Datum(ln); 2893 2894 if (job->flags & JOB_RESTART) { 2895 if (DEBUG(JOB)) { 2896 (void) fprintf(stdout, "%s%s", 2897 "JobInterrupt skipping job on stopped queue", 2898 "-- it was waiting to be restarted.\n"); 2899 (void) fflush(stdout); 2900 } 2901 continue; 2902 } 2903 if (!Targ_Precious(job->node)) { 2904 char *file = (job->node->path == NULL ? 2905 job->node->name : 2906 job->node->path); 2907 if (eunlink(file) == 0) { 2908 Error("*** %s removed", file); 2909 } 2910 } 2911 /* 2912 * Resume the thing so it will take the signal. 2913 */ 2914 if (DEBUG(JOB)) { 2915 (void) fprintf(stdout, 2916 "JobInterrupt passing CONT to stopped child %d.\n", 2917 job->pid); 2918 (void) fflush(stdout); 2919 } 2920 KILL(job->pid, SIGCONT); 2921 #ifdef RMT_WANTS_SIGNALS 2922 if (job->flags & JOB_REMOTE) { 2923 /* 2924 * If job is remote, let the Rmt module do the killing. 2925 */ 2926 if (!Rmt_Signal(job, SIGINT)) { 2927 /* 2928 * If couldn't kill the thing, finish it out now with an 2929 * error code, since no exit report will come in likely. 2930 */ 2931 int status; 2932 status.w_status = 0; 2933 status.w_retcode = 1; 2934 JobFinish(job, &status); 2935 } 2936 } else if (job->pid) { 2937 if (DEBUG(JOB)) { 2938 (void) fprintf(stdout, 2939 "JobInterrupt passing interrupt to stopped child %d.\n", 2940 job->pid); 2941 (void) fflush(stdout); 2942 } 2943 KILL(job->pid, SIGINT); 2944 } 2945 #endif /* RMT_WANTS_SIGNALS */ 2946 } 2947 #endif 2948 Lst_Close(stoppedJobs); 2949 2950 if (runINTERRUPT && !touchFlag) { 2951 interrupt = Targ_FindNode(".INTERRUPT", TARG_NOCREATE); 2952 if (interrupt != NILGNODE) { 2953 ignoreErrors = FALSE; 2954 2955 JobStart(interrupt, JOB_IGNDOTS, (Job *)0); 2956 while (nJobs) { 2957 Job_CatchOutput(); 2958 #ifndef RMT_WILL_WATCH 2959 Job_CatchChildren(!usePipes); 2960 #endif /* RMT_WILL_WATCH */ 2961 } 2962 } 2963 } 2964 Trace_Log(MAKEINTR, 0); 2965 exit(signo); 2966 } 2967 2968 /* 2969 *----------------------------------------------------------------------- 2970 * Job_Finish -- 2971 * Do final processing such as the running of the commands 2972 * attached to the .END target. 2973 * 2974 * Results: 2975 * Number of errors reported. 2976 * 2977 * Side Effects: 2978 * None. 2979 *----------------------------------------------------------------------- 2980 */ 2981 int 2982 Job_Finish() 2983 { 2984 if (postCommands != NILGNODE && !Lst_IsEmpty(postCommands->commands)) { 2985 if (errors) { 2986 Error("Errors reported so .END ignored"); 2987 } else { 2988 JobStart(postCommands, JOB_SPECIAL | JOB_IGNDOTS, NULL); 2989 2990 while (nJobs) { 2991 Job_CatchOutput(); 2992 #ifndef RMT_WILL_WATCH 2993 Job_CatchChildren(!usePipes); 2994 #endif /* RMT_WILL_WATCH */ 2995 } 2996 } 2997 } 2998 Job_TokenFlush(); 2999 return(errors); 3000 } 3001 3002 /*- 3003 *----------------------------------------------------------------------- 3004 * Job_End -- 3005 * Cleanup any memory used by the jobs module 3006 * 3007 * Results: 3008 * None. 3009 * 3010 * Side Effects: 3011 * Memory is freed 3012 *----------------------------------------------------------------------- 3013 */ 3014 void 3015 Job_End() 3016 { 3017 #ifdef CLEANUP 3018 if (shellArgv) 3019 free(shellArgv); 3020 #endif 3021 } 3022 3023 /*- 3024 *----------------------------------------------------------------------- 3025 * Job_Wait -- 3026 * Waits for all running jobs to finish and returns. Sets 'aborting' 3027 * to ABORT_WAIT to prevent other jobs from starting. 3028 * 3029 * Results: 3030 * None. 3031 * 3032 * Side Effects: 3033 * Currently running jobs finish. 3034 * 3035 *----------------------------------------------------------------------- 3036 */ 3037 void 3038 Job_Wait() 3039 { 3040 aborting = ABORT_WAIT; 3041 while (nJobs != 0) { 3042 Job_CatchOutput(); 3043 #ifndef RMT_WILL_WATCH 3044 Job_CatchChildren(!usePipes); 3045 #endif /* RMT_WILL_WATCH */ 3046 } 3047 Job_TokenFlush(); 3048 aborting = 0; 3049 } 3050 3051 /*- 3052 *----------------------------------------------------------------------- 3053 * Job_AbortAll -- 3054 * Abort all currently running jobs without handling output or anything. 3055 * This function is to be called only in the event of a major 3056 * error. Most definitely NOT to be called from JobInterrupt. 3057 * 3058 * Results: 3059 * None 3060 * 3061 * Side Effects: 3062 * All children are killed, not just the firstborn 3063 *----------------------------------------------------------------------- 3064 */ 3065 void 3066 Job_AbortAll() 3067 { 3068 LstNode ln; /* element in job table */ 3069 Job *job; /* the job descriptor in that element */ 3070 int foo; 3071 3072 aborting = ABORT_ERROR; 3073 3074 if (nJobs) { 3075 3076 (void) Lst_Open(jobs); 3077 while ((ln = Lst_Next(jobs)) != NILLNODE) { 3078 job = (Job *) Lst_Datum(ln); 3079 3080 /* 3081 * kill the child process with increasingly drastic signals to make 3082 * darn sure it's dead. 3083 */ 3084 #ifdef RMT_WANTS_SIGNALS 3085 if (job->flags & JOB_REMOTE) { 3086 Rmt_Signal(job, SIGINT); 3087 Rmt_Signal(job, SIGKILL); 3088 } else { 3089 KILL(job->pid, SIGINT); 3090 KILL(job->pid, SIGKILL); 3091 } 3092 #else 3093 KILL(job->pid, SIGINT); 3094 KILL(job->pid, SIGKILL); 3095 #endif /* RMT_WANTS_SIGNALS */ 3096 } 3097 } 3098 3099 /* 3100 * Catch as many children as want to report in at first, then give up 3101 */ 3102 while (waitpid((pid_t) -1, &foo, WNOHANG) > 0) 3103 continue; 3104 } 3105 3106 #ifdef REMOTE 3107 /*- 3108 *----------------------------------------------------------------------- 3109 * JobFlagForMigration -- 3110 * Handle the eviction of a child. Called from RmtStatusChange. 3111 * Flags the child as remigratable and then suspends it. 3112 * 3113 * Results: 3114 * none. 3115 * 3116 * Side Effects: 3117 * The job descriptor is flagged for remigration. 3118 * 3119 *----------------------------------------------------------------------- 3120 */ 3121 void 3122 JobFlagForMigration(hostID) 3123 int hostID; /* ID of host we used, for matching children. */ 3124 { 3125 register Job *job; /* job descriptor for dead child */ 3126 LstNode jnode; /* list element for finding job */ 3127 3128 if (DEBUG(JOB)) { 3129 (void) fprintf(stdout, "JobFlagForMigration(%d) called.\n", hostID); 3130 (void) fflush(stdout); 3131 } 3132 jnode = Lst_Find(jobs, (ClientData)hostID, JobCmpRmtID); 3133 3134 if (jnode == NILLNODE) { 3135 jnode = Lst_Find(stoppedJobs, (ClientData)hostID, JobCmpRmtID); 3136 if (jnode == NILLNODE) { 3137 if (DEBUG(JOB)) { 3138 Error("Evicting host(%d) not in table", hostID); 3139 } 3140 return; 3141 } 3142 } 3143 job = (Job *) Lst_Datum(jnode); 3144 3145 if (DEBUG(JOB)) { 3146 (void) fprintf(stdout, 3147 "JobFlagForMigration(%d) found job '%s'.\n", hostID, 3148 job->node->name); 3149 (void) fflush(stdout); 3150 } 3151 3152 KILL(job->pid, SIGSTOP); 3153 3154 job->flags |= JOB_REMIGRATE; 3155 } 3156 3157 #endif 3158 3159 /*- 3161 *----------------------------------------------------------------------- 3162 * JobRestartJobs -- 3163 * Tries to restart stopped jobs if there are slots available. 3164 * Note that this tries to restart them regardless of pending errors. 3165 * It's not good to leave stopped jobs lying around! 3166 * 3167 * Results: 3168 * None. 3169 * 3170 * Side Effects: 3171 * Resumes(and possibly migrates) jobs. 3172 * 3173 *----------------------------------------------------------------------- 3174 */ 3175 static void 3176 JobRestartJobs() 3177 { 3178 while (!Lst_IsEmpty(stoppedJobs)) { 3179 if (DEBUG(JOB)) { 3180 (void) fprintf(stdout, "Restarting a stopped job.\n"); 3181 (void) fflush(stdout); 3182 } 3183 JobRestart((Job *)Lst_DeQueue(stoppedJobs)); 3184 } 3185 } 3186 3187 #ifndef RMT_WILL_WATCH 3188 #ifndef USE_SELECT 3189 static void 3190 watchfd(job) 3191 Job *job; 3192 { 3193 int i; 3194 if (job->inPollfd != NULL) 3195 Punt("Watching watched job"); 3196 if (fds == NULL) { 3197 maxfds = JBSTART; 3198 fds = emalloc(sizeof(struct pollfd) * maxfds); 3199 jobfds = emalloc(sizeof(Job **) * maxfds); 3200 3201 fds[0].fd = job_pipe[0]; 3202 fds[0].events = POLLIN; 3203 jobfds[0] = &tokenWaitJob; 3204 tokenWaitJob.inPollfd = &fds[0]; 3205 nfds++; 3206 } else if (nfds == maxfds) { 3207 maxfds *= JBFACTOR; 3208 fds = erealloc(fds, sizeof(struct pollfd) * maxfds); 3209 jobfds = erealloc(jobfds, sizeof(Job **) * maxfds); 3210 for (i = 0; i < nfds; i++) 3211 jobfds[i]->inPollfd = &fds[i]; 3212 } 3213 3214 fds[nfds].fd = job->inPipe; 3215 fds[nfds].events = POLLIN; 3216 jobfds[nfds] = job; 3217 job->inPollfd = &fds[nfds]; 3218 nfds++; 3219 } 3220 3221 static void 3222 clearfd(job) 3223 Job *job; 3224 { 3225 int i; 3226 if (job->inPollfd == NULL) 3227 Punt("Unwatching unwatched job"); 3228 i = job->inPollfd - fds; 3229 nfds--; 3230 /* 3231 * Move last job in table into hole made by dead job. 3232 */ 3233 if (nfds != i) { 3234 fds[i] = fds[nfds]; 3235 jobfds[i] = jobfds[nfds]; 3236 jobfds[i]->inPollfd = &fds[i]; 3237 } 3238 job->inPollfd = NULL; 3239 } 3240 3241 static int 3242 readyfd(job) 3243 Job *job; 3244 { 3245 if (job->inPollfd == NULL) 3246 Punt("Polling unwatched job"); 3247 return (job->inPollfd->revents & POLLIN) != 0; 3248 } 3249 #endif 3250 #endif 3251 3252 /*- 3253 *----------------------------------------------------------------------- 3254 * JobTokenAdd -- 3255 * Put a token into the job pipe so that some make process can start 3256 * another job. 3257 * 3258 * Side Effects: 3259 * Allows more build jobs to be spawned somewhere. 3260 * 3261 *----------------------------------------------------------------------- 3262 */ 3263 3264 static void 3265 JobTokenAdd() 3266 { 3267 3268 if (DEBUG(JOB)) 3269 printf("deposit token\n"); 3270 write(job_pipe[1], "+", 1); 3271 } 3272 3273 /*- 3274 *----------------------------------------------------------------------- 3275 * Job_ServerStartTokenAdd -- 3276 * Prep the job token pipe in the root make process. 3277 * 3278 *----------------------------------------------------------------------- 3279 */ 3280 3281 void Job_ServerStart(maxproc) 3282 int maxproc; 3283 { 3284 int i, flags; 3285 char jobarg[64]; 3286 3287 if (pipe(job_pipe) < 0) 3288 Fatal ("error in pipe: %s", strerror(errno)); 3289 3290 /* 3291 * We mark the input side of the pipe non-blocking; we poll(2) the 3292 * pipe when we're waiting for a job token, but we might lose the 3293 * race for the token when a new one becomes available, so the read 3294 * from the pipe should not block. 3295 */ 3296 flags = fcntl(job_pipe[0], F_GETFL, 0); 3297 flags |= O_NONBLOCK; 3298 fcntl(job_pipe[0], F_SETFL, flags); 3299 3300 /* 3301 * Mark job pipes as close-on-exec. 3302 * Note that we will clear this when executing submakes. 3303 */ 3304 fcntl(job_pipe[0], F_SETFD, 1); 3305 fcntl(job_pipe[1], F_SETFD, 1); 3306 3307 snprintf(jobarg, sizeof(jobarg), "%d,%d", job_pipe[0], job_pipe[1]); 3308 3309 Var_Append(MAKEFLAGS, "-J", VAR_GLOBAL); 3310 Var_Append(MAKEFLAGS, jobarg, VAR_GLOBAL); 3311 3312 /* 3313 * Preload job_pipe with one token per job, save the one 3314 * "extra" token for the primary job. 3315 * 3316 * XXX should clip maxJobs against PIPE_BUF -- if maxJobs is 3317 * larger than the write buffer size of the pipe, we will 3318 * deadlock here. 3319 */ 3320 for (i=1; i < maxproc; i++) 3321 JobTokenAdd(); 3322 } 3323 3324 /* 3325 * this tracks the number of tokens currently "out" to build jobs. 3326 */ 3327 static int tokensOutstanding = 0; 3328 static int tokensFree = 0; 3329 /*- 3330 *----------------------------------------------------------------------- 3331 * Job_TokenReturn -- 3332 * Return a withdrawn token to the pool. 3333 * 3334 *----------------------------------------------------------------------- 3335 */ 3336 3337 void 3338 Job_TokenReturn() 3339 { 3340 tokensOutstanding--; 3341 if (tokensOutstanding < 0) 3342 Punt("token botch"); 3343 if (tokensOutstanding) 3344 tokensFree++; 3345 } 3346 3347 /*- 3348 *----------------------------------------------------------------------- 3349 * Job_TokenWithdraw -- 3350 * Attempt to withdraw a token from the pool. 3351 * 3352 * Results: 3353 * Returns TRUE if a token was withdrawn, and FALSE if the pool 3354 * is currently empty. 3355 * 3356 * Side Effects: 3357 * If pool is empty, set wantToken so that we wake up 3358 * when a token is released. 3359 * 3360 *----------------------------------------------------------------------- 3361 */ 3362 3363 3364 Boolean 3365 Job_TokenWithdraw() 3366 { 3367 char tok; 3368 int count; 3369 3370 if (aborting) 3371 return FALSE; 3372 3373 if (tokensOutstanding == 0) { 3374 if (DEBUG(JOB)) 3375 printf("first one's free\n"); 3376 tokensOutstanding++; 3377 wantToken = FALSE; 3378 return TRUE; 3379 } 3380 if (tokensFree > 0) { 3381 tokensFree--; 3382 tokensOutstanding++; 3383 wantToken = FALSE; 3384 return TRUE; 3385 } 3386 count = read(job_pipe[0], &tok, 1); 3387 if (count == 0) 3388 Fatal("eof on job pipe!"); 3389 else if (count < 0) { 3390 if (errno != EAGAIN) { 3391 Fatal("job pipe read: %s", strerror(errno)); 3392 } 3393 if (DEBUG(JOB)) 3394 printf("blocked for token\n"); 3395 wantToken = TRUE; 3396 return FALSE; 3397 } 3398 wantToken = FALSE; 3399 tokensOutstanding++; 3400 if (DEBUG(JOB)) 3401 printf("withdrew token\n"); 3402 return TRUE; 3403 } 3404 3405 /*- 3406 *----------------------------------------------------------------------- 3407 * Job_TokenFlush -- 3408 * Return free tokens to the pool. 3409 * 3410 *----------------------------------------------------------------------- 3411 */ 3412 3413 void 3414 Job_TokenFlush() 3415 { 3416 if (compatMake) return; 3417 3418 while (tokensFree-- > 0) { 3419 JobTokenAdd(); 3420 } 3421 } 3422 3423
Indexes created Fri Sep 26 20:09:58 GMT 2025