job.c revision 1.55
1 /* $NetBSD: job.c,v 1.55 2001/10/16 18:06:29 sjg 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 1.55 2001/10/16 18:06:29 sjg 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 1.55 2001/10/16 18:06:29 sjg Exp $"); 50 #endif 51 #endif /* not lint */ 52 #endif 53 54 /*- 55 * job.c -- 56 * handle the creation etc. of our child processes. 57 * 58 * Interface: 59 * Job_Make Start the creation of the given target. 60 * 61 * Job_CatchChildren Check for and handle the termination of any 62 * children. This must be called reasonably 63 * frequently to keep the whole make going at 64 * a decent clip, since job table entries aren't 65 * removed until their process is caught this way. 66 * Its single argument is TRUE if the function 67 * should block waiting for a child to terminate. 68 * 69 * Job_CatchOutput Print any output our children have produced. 70 * Should also be called fairly frequently to 71 * keep the user informed of what's going on. 72 * If no output is waiting, it will block for 73 * a time given by the SEL_* constants, below, 74 * or until output is ready. 75 * 76 * Job_Init Called to intialize this module. in addition, 77 * any commands attached to the .BEGIN target 78 * are executed before this function returns. 79 * Hence, the makefile must have been parsed 80 * before this function is called. 81 * 82 * Job_End Cleanup any memory used. 83 * 84 * Job_Empty Return TRUE if the job table is completely 85 * empty. 86 * 87 * Job_ParseShell Given the line following a .SHELL target, parse 88 * the line as a shell specification. Returns 89 * FAILURE if the spec was incorrect. 90 * 91 * Job_Finish Perform any final processing which needs doing. 92 * This includes the execution of any commands 93 * which have been/were attached to the .END 94 * target. It should only be called when the 95 * job table is empty. 96 * 97 * Job_AbortAll Abort all currently running jobs. It doesn't 98 * handle output or do anything for the jobs, 99 * just kills them. It should only be called in 100 * an emergency, as it were. 101 * 102 * Job_CheckCommands Verify that the commands for a target are 103 * ok. Provide them if necessary and possible. 104 * 105 * Job_Touch Update a target without really updating it. 106 * 107 * Job_Wait Wait for all currently-running jobs to finish. 108 */ 109 110 #include <sys/types.h> 111 #include <sys/stat.h> 112 #include <sys/file.h> 113 #include <sys/time.h> 114 #include <sys/wait.h> 115 #include <fcntl.h> 116 #include <errno.h> 117 #include <utime.h> 118 #include <stdio.h> 119 #include <string.h> 120 #include <signal.h> 121 #ifndef RMT_WILL_WATCH 122 #ifndef USE_SELECT 123 #include <poll.h> 124 #endif 125 #endif 126 #include "make.h" 127 #include "hash.h" 128 #include "dir.h" 129 #include "job.h" 130 #include "pathnames.h" 131 #include "trace.h" 132 #ifdef REMOTE 133 #include "rmt.h" 134 # define STATIC 135 #else 136 # define STATIC static 137 #endif 138 139 /* 140 * error handling variables 141 */ 142 static int errors = 0; /* number of errors reported */ 143 static int aborting = 0; /* why is the make aborting? */ 144 #define ABORT_ERROR 1 /* Because of an error */ 145 #define ABORT_INTERRUPT 2 /* Because it was interrupted */ 146 #define ABORT_WAIT 3 /* Waiting for jobs to finish */ 147 148 /* 149 * XXX: Avoid SunOS bug... FILENO() is fp->_file, and file 150 * is a char! So when we go above 127 we turn negative! 151 */ 152 #define FILENO(a) ((unsigned) fileno(a)) 153 154 /* 155 * post-make command processing. The node postCommands is really just the 156 * .END target but we keep it around to avoid having to search for it 157 * all the time. 158 */ 159 static GNode *postCommands; /* node containing commands to execute when 160 * everything else is done */ 161 static int numCommands; /* The number of commands actually printed 162 * for a target. Should this number be 163 * 0, no shell will be executed. */ 164 165 /* 166 * Return values from JobStart. 167 */ 168 #define JOB_RUNNING 0 /* Job is running */ 169 #define JOB_ERROR 1 /* Error in starting the job */ 170 #define JOB_FINISHED 2 /* The job is already finished */ 171 #define JOB_STOPPED 3 /* The job is stopped */ 172 173 174 175 /* 176 * Descriptions for various shells. 177 */ 178 static Shell shells[] = { 179 /* 180 * CSH description. The csh can do echo control by playing 181 * with the setting of the 'echo' shell variable. Sadly, 182 * however, it is unable to do error control nicely. 183 */ 184 { 185 "csh", 186 TRUE, "unset verbose", "set verbose", "unset verbose", 10, 187 FALSE, "echo \"%s\"\n", "csh -c \"%s || exit 0\"", 188 "v", "e", 189 }, 190 /* 191 * SH description. Echo control is also possible and, under 192 * sun UNIX anyway, one can even control error checking. 193 */ 194 { 195 "sh", 196 TRUE, "set -", "set -v", "set -", 5, 197 TRUE, "set -e", "set +e", 198 #ifdef OLDBOURNESHELL 199 FALSE, "echo \"%s\"\n", "sh -c '%s || exit 0'\n", 200 #endif 201 #ifdef __NetBSD__ 202 "vq", 203 #else 204 "v", 205 #endif 206 "e", 207 }, 208 /* 209 * UNKNOWN. 210 */ 211 { 212 (char *) 0, 213 FALSE, (char *) 0, (char *) 0, (char *) 0, 0, 214 FALSE, (char *) 0, (char *) 0, 215 (char *) 0, (char *) 0, 216 } 217 }; 218 static Shell *commandShell = &shells[DEFSHELL];/* this is the shell to 219 * which we pass all 220 * commands in the Makefile. 221 * It is set by the 222 * Job_ParseShell function */ 223 static char *shellPath = NULL, /* full pathname of 224 * executable image */ 225 *shellName = NULL, /* last component of shell */ 226 *shellArgv = NULL; /* Custom shell args */ 227 228 229 static int maxJobs; /* The most children we can run at once */ 230 static int maxLocal; /* The most local ones we can have */ 231 STATIC int nJobs; /* The number of children currently running */ 232 STATIC int nLocal; /* The number of local children */ 233 STATIC Lst jobs; /* The structures that describe them */ 234 static Boolean wantToken; /* we want a token */ 235 236 /* 237 * Set of descriptors of pipes connected to 238 * the output channels of children 239 */ 240 #ifndef RMT_WILL_WATCH 241 #ifdef USE_SELECT 242 static fd_set outputs; 243 #else 244 static struct pollfd *fds = NULL; 245 static Job **jobfds = NULL; 246 static int nfds = 0; 247 static int maxfds = 0; 248 static void watchfd __P((Job *)); 249 static void clearfd __P((Job *)); 250 static int readyfd __P((Job *)); 251 #define JBSTART 256 252 #define JBFACTOR 2 253 #endif 254 #endif 255 256 STATIC GNode *lastNode; /* The node for which output was most recently 257 * produced. */ 258 STATIC char *targFmt; /* Format string to use to head output from a 259 * job when it's not the most-recent job heard 260 * from */ 261 static Job tokenWaitJob; /* token wait pseudo-job */ 262 int job_pipe[2] = { -1, -1 }; /* job server pipes. */ 263 264 #ifdef REMOTE 265 # define TARG_FMT "--- %s at %s ---\n" /* Default format */ 266 # define MESSAGE(fp, gn) \ 267 (void) fprintf(fp, targFmt, gn->name, gn->rem.hname) 268 #else 269 # define TARG_FMT "--- %s ---\n" /* Default format */ 270 # define MESSAGE(fp, gn) \ 271 (void) fprintf(fp, targFmt, gn->name) 272 #endif 273 274 /* 275 * When JobStart attempts to run a job remotely but can't, and isn't allowed 276 * to run the job locally, or when Job_CatchChildren detects a job that has 277 * been migrated home, the job is placed on the stoppedJobs queue to be run 278 * when the next job finishes. 279 */ 280 STATIC Lst stoppedJobs; /* Lst of Job structures describing 281 * jobs that were stopped due to concurrency 282 * limits or migration home */ 283 284 285 #if defined(USE_PGRP) && defined(SYSV) 286 # define KILL(pid, sig) kill(-(pid), (sig)) 287 #else 288 # if defined(USE_PGRP) 289 # define KILL(pid, sig) killpg((pid), (sig)) 290 # else 291 # define KILL(pid, sig) kill((pid), (sig)) 292 # endif 293 #endif 294 295 /* 296 * Grmpf... There is no way to set bits of the wait structure 297 * anymore with the stupid W*() macros. I liked the union wait 298 * stuff much more. So, we devise our own macros... This is 299 * really ugly, use dramamine sparingly. You have been warned. 300 */ 301 #ifndef W_STOPCODE 302 #define W_STOPCODE(sig) (((sig) << 8) | 0177) 303 #endif 304 #ifndef W_EXITCODE 305 #define W_EXITCODE(ret, sig) ((ret << 8) | (sig)) 306 #endif 307 308 static int JobCondPassSig __P((ClientData, ClientData)); 309 static void JobPassSig __P((int)); 310 static void JobIgnoreSig __P((int)); 311 #ifdef USE_PGRP 312 static void JobContinueSig __P((int)); 313 #endif 314 static int JobCmpPid __P((ClientData, ClientData)); 315 static int JobPrintCommand __P((ClientData, ClientData)); 316 static int JobSaveCommand __P((ClientData, ClientData)); 317 static void JobClose __P((Job *)); 318 #ifdef REMOTE 319 static int JobCmpRmtID __P((Job *, int)); 320 # ifdef RMT_WILL_WATCH 321 static void JobLocalInput __P((int, Job *)); 322 # endif 323 #else 324 static void JobFinish __P((Job *, int *)); 325 static void JobExec __P((Job *, char **)); 326 #endif 327 static void JobMakeArgv __P((Job *, char **)); 328 static void JobRestart __P((Job *)); 329 static int JobStart __P((GNode *, int, Job *)); 330 static char *JobOutput __P((Job *, char *, char *, int)); 331 static void JobDoOutput __P((Job *, Boolean)); 332 static Shell *JobMatchShell __P((char *)); 333 static void JobInterrupt __P((int, int)); 334 static void JobRestartJobs __P((void)); 335 static void JobTokenAdd __P((void)); 336 337 /*- 338 *----------------------------------------------------------------------- 339 * JobCondPassSig -- 340 * Pass a signal to a job if the job is remote or if USE_PGRP 341 * is defined. 342 * 343 * Results: 344 * === 0 345 * 346 * Side Effects: 347 * None, except the job may bite it. 348 * 349 *----------------------------------------------------------------------- 350 */ 351 static int 352 JobCondPassSig(jobp, signop) 353 ClientData jobp; /* Job to biff */ 354 ClientData signop; /* Signal to send it */ 355 { 356 Job *job = (Job *) jobp; 357 int signo = *(int *) signop; 358 #ifdef RMT_WANTS_SIGNALS 359 if (job->flags & JOB_REMOTE) { 360 (void) Rmt_Signal(job, signo); 361 } else { 362 KILL(job->pid, signo); 363 } 364 #else 365 /* 366 * Assume that sending the signal to job->pid will signal any remote 367 * job as well. 368 */ 369 if (DEBUG(JOB)) { 370 (void) fprintf(stdout, 371 "JobCondPassSig passing signal %d to child %d.\n", 372 signo, job->pid); 373 (void) fflush(stdout); 374 } 375 KILL(job->pid, signo); 376 #endif 377 return 0; 378 } 379 380 /*- 381 *----------------------------------------------------------------------- 382 * JobIgnoreSig -- 383 * No-op signal handler so we wake up from poll. 384 * 385 * Results: 386 * None. 387 * 388 * Side Effects: 389 * None. 390 * 391 *----------------------------------------------------------------------- 392 */ 393 static void 394 JobIgnoreSig(signo) 395 int signo; /* The signal number we've received */ 396 { 397 /* 398 * Do nothing. The mere fact that we've been called will cause 399 * poll/select in Job_CatchOutput() to return early. 400 */ 401 } 402 403 404 #ifdef USE_PGRP 405 /*- 406 *----------------------------------------------------------------------- 407 * JobContinueSig -- 408 * Resume all stopped jobs. 409 * 410 * Results: 411 * None. 412 * 413 * Side Effects: 414 * Jobs start running again. 415 * 416 *----------------------------------------------------------------------- 417 */ 418 static void 419 JobContinueSig(signo) 420 int signo; /* The signal number we've received */ 421 { 422 if (signal(SIGTSTP, SIG_IGN) != SIG_IGN) { 423 (void) signal(SIGTSTP, JobPassSig); 424 } 425 JobRestartJobs(); 426 } 427 #endif 428 429 /*- 430 *----------------------------------------------------------------------- 431 * JobPassSig -- 432 * Pass a signal on to all remote jobs and to all local jobs if 433 * USE_PGRP is defined, then die ourselves. 434 * 435 * Results: 436 * None. 437 * 438 * Side Effects: 439 * We die by the same signal. 440 * 441 *----------------------------------------------------------------------- 442 */ 443 static void 444 JobPassSig(signo) 445 int signo; /* The signal number we've received */ 446 { 447 sigset_t nmask, omask; 448 struct sigaction act; 449 int sigcont; 450 451 if (DEBUG(JOB)) { 452 (void) fprintf(stdout, "JobPassSig(%d) called.\n", signo); 453 (void) fflush(stdout); 454 } 455 Lst_ForEach(jobs, JobCondPassSig, (ClientData) &signo); 456 457 /* 458 * Deal with proper cleanup based on the signal received. We only run 459 * the .INTERRUPT target if the signal was in fact an interrupt. The other 460 * three termination signals are more of a "get out *now*" command. 461 */ 462 if (signo == SIGINT) { 463 JobInterrupt(TRUE, signo); 464 } else if ((signo == SIGHUP) || (signo == SIGTERM) || (signo == SIGQUIT)) { 465 JobInterrupt(FALSE, signo); 466 } 467 468 /* 469 * Leave gracefully if SIGQUIT, rather than core dumping. 470 */ 471 if (signo == SIGQUIT) { 472 Finish(0); 473 } 474 475 if (signo == SIGTSTP) { 476 Job_CatchChildren(FALSE); 477 } 478 /* 479 * Send ourselves the signal now we've given the message to everyone else. 480 * Note we block everything else possible while we're getting the signal. 481 * This ensures that all our jobs get continued when we wake up before 482 * we take any other signal. 483 */ 484 sigfillset(&nmask); 485 sigprocmask(SIG_SETMASK, &nmask, &omask); 486 act.sa_handler = SIG_DFL; 487 sigemptyset(&act.sa_mask); 488 act.sa_flags = 0; 489 sigaction(signo, &act, NULL); 490 491 if (DEBUG(JOB)) { 492 (void) fprintf(stdout, 493 "JobPassSig passing signal %d to self.\n", signo); 494 (void) fflush(stdout); 495 } 496 497 (void) kill(getpid(), signo); 498 if (signo != SIGTSTP) { 499 sigcont = SIGCONT; 500 Lst_ForEach(jobs, JobCondPassSig, (ClientData) &sigcont); 501 } 502 503 (void) sigprocmask(SIG_SETMASK, &omask, NULL); 504 sigprocmask(SIG_SETMASK, &omask, NULL); 505 if (signo != SIGCONT && signo != SIGTSTP) { 506 act.sa_handler = JobPassSig; 507 sigaction(sigcont, &act, NULL); 508 } 509 } 510 511 /*- 512 *----------------------------------------------------------------------- 513 * JobCmpPid -- 514 * Compare the pid of the job with the given pid and return 0 if they 515 * are equal. This function is called from Job_CatchChildren via 516 * Lst_Find to find the job descriptor of the finished job. 517 * 518 * Results: 519 * 0 if the pid's match 520 * 521 * Side Effects: 522 * None 523 *----------------------------------------------------------------------- 524 */ 525 static int 526 JobCmpPid(job, pid) 527 ClientData job; /* job to examine */ 528 ClientData pid; /* process id desired */ 529 { 530 return *(int *) pid - ((Job *) job)->pid; 531 } 532 533 #ifdef REMOTE 534 /*- 535 *----------------------------------------------------------------------- 536 * JobCmpRmtID -- 537 * Compare the rmtID of the job with the given rmtID and return 0 if they 538 * are equal. 539 * 540 * Results: 541 * 0 if the rmtID's match 542 * 543 * Side Effects: 544 * None. 545 *----------------------------------------------------------------------- 546 */ 547 static int 548 JobCmpRmtID(job, rmtID) 549 ClientData job; /* job to examine */ 550 ClientData rmtID; /* remote id desired */ 551 { 552 return(*(int *) rmtID - *(int *) job->rmtID); 553 } 554 #endif 555 556 /*- 557 *----------------------------------------------------------------------- 558 * JobPrintCommand -- 559 * Put out another command for the given job. If the command starts 560 * with an @ or a - we process it specially. In the former case, 561 * so long as the -s and -n flags weren't given to make, we stick 562 * a shell-specific echoOff command in the script. In the latter, 563 * we ignore errors for the entire job, unless the shell has error 564 * control. 565 * If the command is just "..." we take all future commands for this 566 * job to be commands to be executed once the entire graph has been 567 * made and return non-zero to signal that the end of the commands 568 * was reached. These commands are later attached to the postCommands 569 * node and executed by Job_End when all things are done. 570 * This function is called from JobStart via Lst_ForEach. 571 * 572 * Results: 573 * Always 0, unless the command was "..." 574 * 575 * Side Effects: 576 * If the command begins with a '-' and the shell has no error control, 577 * the JOB_IGNERR flag is set in the job descriptor. 578 * If the command is "..." and we're not ignoring such things, 579 * tailCmds is set to the successor node of the cmd. 580 * numCommands is incremented if the command is actually printed. 581 *----------------------------------------------------------------------- 582 */ 583 static int 584 JobPrintCommand(cmdp, jobp) 585 ClientData cmdp; /* command string to print */ 586 ClientData jobp; /* job for which to print it */ 587 { 588 Boolean noSpecials; /* true if we shouldn't worry about 589 * inserting special commands into 590 * the input stream. */ 591 Boolean shutUp = FALSE; /* true if we put a no echo command 592 * into the command file */ 593 Boolean errOff = FALSE; /* true if we turned error checking 594 * off before printing the command 595 * and need to turn it back on */ 596 char *cmdTemplate; /* Template to use when printing the 597 * command */ 598 char *cmdStart; /* Start of expanded command */ 599 LstNode cmdNode; /* Node for replacing the command */ 600 char *cmd = (char *) cmdp; 601 Job *job = (Job *) jobp; 602 char *cp; 603 604 noSpecials = NoExecute(job->node); 605 606 if (strcmp(cmd, "...") == 0) { 607 job->node->type |= OP_SAVE_CMDS; 608 if ((job->flags & JOB_IGNDOTS) == 0) { 609 job->tailCmds = Lst_Succ(Lst_Member(job->node->commands, 610 (ClientData)cmd)); 611 return 1; 612 } 613 return 0; 614 } 615 616 #define DBPRINTF(fmt, arg) if (DEBUG(JOB)) { \ 617 (void) fprintf(stdout, fmt, arg); \ 618 (void) fflush(stdout); \ 619 } \ 620 (void) fprintf(job->cmdFILE, fmt, arg); \ 621 (void) fflush(job->cmdFILE); 622 623 numCommands += 1; 624 625 /* 626 * For debugging, we replace each command with the result of expanding 627 * the variables in the command. 628 */ 629 cmdNode = Lst_Member(job->node->commands, (ClientData)cmd); 630 cmdStart = cmd = Var_Subst(NULL, cmd, job->node, FALSE); 631 Lst_Replace(cmdNode, (ClientData)cmdStart); 632 633 cmdTemplate = "%s\n"; 634 635 /* 636 * Check for leading @' and -'s to control echoing and error checking. 637 */ 638 while (*cmd == '@' || *cmd == '-') { 639 if (*cmd == '@') { 640 shutUp = TRUE; 641 } else { 642 errOff = TRUE; 643 } 644 cmd++; 645 } 646 647 while (isspace((unsigned char) *cmd)) 648 cmd++; 649 650 if (shutUp) { 651 if (!(job->flags & JOB_SILENT) && !noSpecials && 652 commandShell->hasEchoCtl) { 653 DBPRINTF("%s\n", commandShell->echoOff); 654 } else { 655 shutUp = FALSE; 656 } 657 } 658 659 if (errOff) { 660 if ( !(job->flags & JOB_IGNERR) && !noSpecials) { 661 if (commandShell->hasErrCtl) { 662 /* 663 * we don't want the error-control commands showing 664 * up either, so we turn off echoing while executing 665 * them. We could put another field in the shell 666 * structure to tell JobDoOutput to look for this 667 * string too, but why make it any more complex than 668 * it already is? 669 */ 670 if (!(job->flags & JOB_SILENT) && !shutUp && 671 commandShell->hasEchoCtl) { 672 DBPRINTF("%s\n", commandShell->echoOff); 673 DBPRINTF("%s\n", commandShell->ignErr); 674 DBPRINTF("%s\n", commandShell->echoOn); 675 } else { 676 DBPRINTF("%s\n", commandShell->ignErr); 677 } 678 } else if (commandShell->ignErr && 679 (*commandShell->ignErr != '\0')) 680 { 681 /* 682 * The shell has no error control, so we need to be 683 * weird to get it to ignore any errors from the command. 684 * If echoing is turned on, we turn it off and use the 685 * errCheck template to echo the command. Leave echoing 686 * off so the user doesn't see the weirdness we go through 687 * to ignore errors. Set cmdTemplate to use the weirdness 688 * instead of the simple "%s\n" template. 689 */ 690 if (!(job->flags & JOB_SILENT) && !shutUp && 691 commandShell->hasEchoCtl) { 692 DBPRINTF("%s\n", commandShell->echoOff); 693 DBPRINTF(commandShell->errCheck, cmd); 694 shutUp = TRUE; 695 } 696 cmdTemplate = commandShell->ignErr; 697 /* 698 * The error ignoration (hee hee) is already taken care 699 * of by the ignErr template, so pretend error checking 700 * is still on. 701 */ 702 errOff = FALSE; 703 } else { 704 errOff = FALSE; 705 } 706 } else { 707 errOff = FALSE; 708 } 709 } 710 711 if (DEBUG(SHELL) && strcmp(shellName, "sh") == 0 && 712 (job->flags & JOB_TRACED) == 0) { 713 DBPRINTF("set -%s\n", "x"); 714 job->flags |= JOB_TRACED; 715 } 716 717 if ((cp = Check_Cwd_Cmd(cmd)) != NULL) { 718 DBPRINTF("test -d %s && ", cp); 719 DBPRINTF("cd %s; ", cp); 720 } 721 DBPRINTF(cmdTemplate, cmd); 722 free(cmdStart); 723 724 if (errOff) { 725 /* 726 * If echoing is already off, there's no point in issuing the 727 * echoOff command. Otherwise we issue it and pretend it was on 728 * for the whole command... 729 */ 730 if (!shutUp && !(job->flags & JOB_SILENT) && commandShell->hasEchoCtl){ 731 DBPRINTF("%s\n", commandShell->echoOff); 732 shutUp = TRUE; 733 } 734 DBPRINTF("%s\n", commandShell->errCheck); 735 } 736 if (shutUp) { 737 DBPRINTF("%s\n", commandShell->echoOn); 738 } 739 return 0; 740 } 741 742 /*- 743 *----------------------------------------------------------------------- 744 * JobSaveCommand -- 745 * Save a command to be executed when everything else is done. 746 * Callback function for JobFinish... 747 * 748 * Results: 749 * Always returns 0 750 * 751 * Side Effects: 752 * The command is tacked onto the end of postCommands's commands list. 753 * 754 *----------------------------------------------------------------------- 755 */ 756 static int 757 JobSaveCommand(cmd, gn) 758 ClientData cmd; 759 ClientData gn; 760 { 761 cmd = (ClientData) Var_Subst(NULL, (char *) cmd, (GNode *) gn, FALSE); 762 (void) Lst_AtEnd(postCommands->commands, cmd); 763 return(0); 764 } 765 766 767 /*- 768 *----------------------------------------------------------------------- 769 * JobClose -- 770 * Called to close both input and output pipes when a job is finished. 771 * 772 * Results: 773 * Nada 774 * 775 * Side Effects: 776 * The file descriptors associated with the job are closed. 777 * 778 *----------------------------------------------------------------------- 779 */ 780 static void 781 JobClose(job) 782 Job *job; 783 { 784 if (usePipes && (job->flags & JOB_FIRST)) { 785 #ifdef RMT_WILL_WATCH 786 Rmt_Ignore(job->inPipe); 787 #else 788 #ifdef USE_SELECT 789 FD_CLR(job->inPipe, &outputs); 790 #else 791 clearfd(job); 792 #endif 793 #endif 794 if (job->outPipe != job->inPipe) { 795 (void) close(job->outPipe); 796 } 797 JobDoOutput(job, TRUE); 798 (void) close(job->inPipe); 799 } else { 800 (void) close(job->outFd); 801 JobDoOutput(job, TRUE); 802 } 803 } 804 805 /*- 806 *----------------------------------------------------------------------- 807 * JobFinish -- 808 * Do final processing for the given job including updating 809 * parents and starting new jobs as available/necessary. Note 810 * that we pay no attention to the JOB_IGNERR flag here. 811 * This is because when we're called because of a noexecute flag 812 * or something, jstat.w_status is 0 and when called from 813 * Job_CatchChildren, the status is zeroed if it s/b ignored. 814 * 815 * Results: 816 * None 817 * 818 * Side Effects: 819 * Some nodes may be put on the toBeMade queue. 820 * Final commands for the job are placed on postCommands. 821 * 822 * If we got an error and are aborting (aborting == ABORT_ERROR) and 823 * the job list is now empty, we are done for the day. 824 * If we recognized an error (errors !=0), we set the aborting flag 825 * to ABORT_ERROR so no more jobs will be started. 826 *----------------------------------------------------------------------- 827 */ 828 /*ARGSUSED*/ 829 static void 830 JobFinish(job, status) 831 Job *job; /* job to finish */ 832 int *status; /* sub-why job went away */ 833 { 834 Boolean done; 835 836 if ((WIFEXITED(*status) && 837 (((WEXITSTATUS(*status) != 0) && !(job->flags & JOB_IGNERR)))) || 838 WIFSIGNALED(*status)) 839 { 840 /* 841 * If it exited non-zero and either we're doing things our 842 * way or we're not ignoring errors, the job is finished. 843 * Similarly, if the shell died because of a signal 844 * the job is also finished. In these 845 * cases, finish out the job's output before printing the exit 846 * status... 847 */ 848 #ifdef REMOTE 849 KILL(job->pid, SIGCONT); 850 #endif 851 JobClose(job); 852 if (job->cmdFILE != NULL && job->cmdFILE != stdout) { 853 (void) fclose(job->cmdFILE); 854 job->cmdFILE = NULL; 855 } 856 done = TRUE; 857 #ifdef REMOTE 858 if (job->flags & JOB_REMOTE) 859 Rmt_Done(job->rmtID, job->node); 860 #endif 861 } else if (WIFEXITED(*status)) { 862 /* 863 * Deal with ignored errors in -B mode. We need to print a message 864 * telling of the ignored error as well as setting status.w_status 865 * to 0 so the next command gets run. To do this, we set done to be 866 * TRUE if in -B mode and the job exited non-zero. 867 */ 868 done = WEXITSTATUS(*status) != 0; 869 /* 870 * Old comment said: "Note we don't 871 * want to close down any of the streams until we know we're at the 872 * end." 873 * But we do. Otherwise when are we going to print the rest of the 874 * stuff? 875 */ 876 JobClose(job); 877 #ifdef REMOTE 878 if (job->flags & JOB_REMOTE) 879 Rmt_Done(job->rmtID, job->node); 880 #endif /* REMOTE */ 881 } else { 882 /* 883 * No need to close things down or anything. 884 */ 885 done = FALSE; 886 } 887 888 if (done || 889 WIFSTOPPED(*status) || 890 (WIFSIGNALED(*status) && (WTERMSIG(*status) == SIGCONT))) 891 { 892 FILE *out; 893 894 if (compatMake && !usePipes && (job->flags & JOB_IGNERR)) { 895 /* 896 * If output is going to a file and this job is ignoring 897 * errors, arrange to have the exit status sent to the 898 * output file as well. 899 */ 900 out = fdopen(job->outFd, "w"); 901 if (out == NULL) 902 Punt("Cannot fdopen"); 903 } else { 904 out = stdout; 905 } 906 907 if (WIFEXITED(*status)) { 908 if (DEBUG(JOB)) { 909 (void) fprintf(stdout, "Process %d exited.\n", job->pid); 910 (void) fflush(stdout); 911 } 912 if (WEXITSTATUS(*status) != 0) { 913 if (usePipes && job->node != lastNode) { 914 MESSAGE(out, job->node); 915 lastNode = job->node; 916 } 917 (void) fprintf(out, "*** Error code %d%s\n", 918 WEXITSTATUS(*status), 919 (job->flags & JOB_IGNERR) ? "(ignored)" : ""); 920 921 if (job->flags & JOB_IGNERR) { 922 *status = 0; 923 } 924 } else if (DEBUG(JOB)) { 925 if (usePipes && job->node != lastNode) { 926 MESSAGE(out, job->node); 927 lastNode = job->node; 928 } 929 (void) fprintf(out, "*** Completed successfully\n"); 930 } 931 } else if (WIFSTOPPED(*status) && WSTOPSIG(*status) != SIGCONT) { 932 if (DEBUG(JOB)) { 933 (void) fprintf(stdout, "Process %d stopped.\n", job->pid); 934 (void) fflush(stdout); 935 } 936 if (usePipes && job->node != lastNode) { 937 MESSAGE(out, job->node); 938 lastNode = job->node; 939 } 940 if (!(job->flags & JOB_REMIGRATE)) { 941 switch (WSTOPSIG(*status)) { 942 case SIGTSTP: 943 (void) fprintf(out, "*** Suspended\n"); 944 break; 945 case SIGSTOP: 946 (void) fprintf(out, "*** Stopped\n"); 947 break; 948 default: 949 (void) fprintf(out, "*** Stopped -- signal %d\n", 950 WSTOPSIG(*status)); 951 } 952 } 953 job->flags |= JOB_RESUME; 954 (void)Lst_AtEnd(stoppedJobs, (ClientData)job); 955 #ifdef REMOTE 956 if (job->flags & JOB_REMIGRATE) 957 JobRestart(job); 958 #endif 959 (void) fflush(out); 960 return; 961 } else if (WIFSTOPPED(*status) && WSTOPSIG(*status) == SIGCONT) { 962 /* 963 * If the beastie has continued, shift the Job from the stopped 964 * list to the running one (or re-stop it if concurrency is 965 * exceeded) and go and get another child. 966 */ 967 if (job->flags & (JOB_RESUME|JOB_REMIGRATE|JOB_RESTART)) { 968 if (usePipes && job->node != lastNode) { 969 MESSAGE(out, job->node); 970 lastNode = job->node; 971 } 972 (void) fprintf(out, "*** Continued\n"); 973 } 974 if (!(job->flags & JOB_CONTINUING)) { 975 if (DEBUG(JOB)) { 976 (void) fprintf(stdout, 977 "Warning: process %d was not continuing.\n", 978 job->pid); 979 (void) fflush(stdout); 980 } 981 #ifdef notdef 982 /* 983 * We don't really want to restart a job from scratch just 984 * because it continued, especially not without killing the 985 * continuing process! That's why this is ifdef'ed out. 986 * FD - 9/17/90 987 */ 988 JobRestart(job); 989 #endif 990 } 991 job->flags &= ~JOB_CONTINUING; 992 Lst_AtEnd(jobs, (ClientData)job); 993 nJobs += 1; 994 if (!(job->flags & JOB_REMOTE)) { 995 if (DEBUG(JOB)) { 996 (void) fprintf(stdout, 997 "Process %d is continuing locally.\n", 998 job->pid); 999 (void) fflush(stdout); 1000 } 1001 nLocal += 1; 1002 } 1003 (void) fflush(out); 1004 return; 1005 } else { 1006 if (usePipes && job->node != lastNode) { 1007 MESSAGE(out, job->node); 1008 lastNode = job->node; 1009 } 1010 (void) fprintf(out, "*** Signal %d\n", WTERMSIG(*status)); 1011 } 1012 1013 (void) fflush(out); 1014 } 1015 1016 /* 1017 * Now handle the -B-mode stuff. If the beast still isn't finished, 1018 * try and restart the job on the next command. If JobStart says it's 1019 * ok, it's ok. If there's an error, this puppy is done. 1020 */ 1021 if (compatMake && (WIFEXITED(*status) && 1022 !Lst_IsAtEnd(job->node->commands))) { 1023 switch (JobStart(job->node, job->flags & JOB_IGNDOTS, job)) { 1024 case JOB_RUNNING: 1025 done = FALSE; 1026 break; 1027 case JOB_ERROR: 1028 done = TRUE; 1029 *status = W_EXITCODE(1, 0); 1030 break; 1031 case JOB_FINISHED: 1032 /* 1033 * If we got back a JOB_FINISHED code, JobStart has already 1034 * called Make_Update and freed the job descriptor. We set 1035 * done to false here to avoid fake cycles and double frees. 1036 * JobStart needs to do the update so we can proceed up the 1037 * graph when given the -n flag.. 1038 */ 1039 done = FALSE; 1040 break; 1041 } 1042 } else { 1043 done = TRUE; 1044 } 1045 1046 if (done) { 1047 Trace_Log(JOBEND, job); 1048 if (!compatMake && !(job->flags & JOB_SPECIAL)) { 1049 if ((*status != 0) || 1050 (aborting == ABORT_ERROR) || 1051 (aborting == ABORT_INTERRUPT)) 1052 Job_TokenReturn(); 1053 } 1054 1055 } 1056 1057 if (done && 1058 (aborting != ABORT_ERROR) && 1059 (aborting != ABORT_INTERRUPT) && 1060 (*status == 0)) 1061 { 1062 /* 1063 * As long as we aren't aborting and the job didn't return a non-zero 1064 * status that we shouldn't ignore, we call Make_Update to update 1065 * the parents. In addition, any saved commands for the node are placed 1066 * on the .END target. 1067 */ 1068 if (job->tailCmds != NILLNODE) { 1069 Lst_ForEachFrom(job->node->commands, job->tailCmds, 1070 JobSaveCommand, 1071 (ClientData)job->node); 1072 } 1073 job->node->made = MADE; 1074 if (!(job->flags & JOB_SPECIAL)) 1075 Job_TokenReturn(); 1076 Make_Update(job->node); 1077 free((Address)job); 1078 } else if (*status != 0) { 1079 errors += 1; 1080 free((Address)job); 1081 } 1082 JobRestartJobs(); 1083 1084 /* 1085 * Set aborting if any error. 1086 */ 1087 if (errors && !keepgoing && (aborting != ABORT_INTERRUPT)) { 1088 /* 1089 * If we found any errors in this batch of children and the -k flag 1090 * wasn't given, we set the aborting flag so no more jobs get 1091 * started. 1092 */ 1093 aborting = ABORT_ERROR; 1094 } 1095 1096 if ((aborting == ABORT_ERROR) && Job_Empty()) { 1097 /* 1098 * If we are aborting and the job table is now empty, we finish. 1099 */ 1100 Finish(errors); 1101 } 1102 } 1103 1104 /*- 1105 *----------------------------------------------------------------------- 1106 * Job_Touch -- 1107 * Touch the given target. Called by JobStart when the -t flag was 1108 * given 1109 * 1110 * Results: 1111 * None 1112 * 1113 * Side Effects: 1114 * The data modification of the file is changed. In addition, if the 1115 * file did not exist, it is created. 1116 *----------------------------------------------------------------------- 1117 */ 1118 void 1119 Job_Touch(gn, silent) 1120 GNode *gn; /* the node of the file to touch */ 1121 Boolean silent; /* TRUE if should not print messages */ 1122 { 1123 int streamID; /* ID of stream opened to do the touch */ 1124 struct utimbuf times; /* Times for utime() call */ 1125 1126 if (gn->type & (OP_JOIN|OP_USE|OP_USEBEFORE|OP_EXEC|OP_OPTIONAL|OP_PHONY)) { 1127 /* 1128 * .JOIN, .USE, .ZEROTIME and .OPTIONAL targets are "virtual" targets 1129 * and, as such, shouldn't really be created. 1130 */ 1131 return; 1132 } 1133 1134 if (!silent || NoExecute(gn)) { 1135 (void) fprintf(stdout, "touch %s\n", gn->name); 1136 (void) fflush(stdout); 1137 } 1138 1139 if (NoExecute(gn)) { 1140 return; 1141 } 1142 1143 if (gn->type & OP_ARCHV) { 1144 Arch_Touch(gn); 1145 } else if (gn->type & OP_LIB) { 1146 Arch_TouchLib(gn); 1147 } else { 1148 char *file = gn->path ? gn->path : gn->name; 1149 1150 times.actime = times.modtime = now; 1151 if (utime(file, ×) < 0){ 1152 streamID = open(file, O_RDWR | O_CREAT, 0666); 1153 1154 if (streamID >= 0) { 1155 char c; 1156 1157 /* 1158 * Read and write a byte to the file to change the 1159 * modification time, then close the file. 1160 */ 1161 if (read(streamID, &c, 1) == 1) { 1162 (void) lseek(streamID, (off_t)0, SEEK_SET); 1163 (void) write(streamID, &c, 1); 1164 } 1165 1166 (void) close(streamID); 1167 } else { 1168 (void) fprintf(stdout, "*** couldn't touch %s: %s", 1169 file, strerror(errno)); 1170 (void) fflush(stdout); 1171 } 1172 } 1173 } 1174 } 1175 1176 /*- 1177 *----------------------------------------------------------------------- 1178 * Job_CheckCommands -- 1179 * Make sure the given node has all the commands it needs. 1180 * 1181 * Results: 1182 * TRUE if the commands list is/was ok. 1183 * 1184 * Side Effects: 1185 * The node will have commands from the .DEFAULT rule added to it 1186 * if it needs them. 1187 *----------------------------------------------------------------------- 1188 */ 1189 Boolean 1190 Job_CheckCommands(gn, abortProc) 1191 GNode *gn; /* The target whose commands need 1192 * verifying */ 1193 void (*abortProc) __P((char *, ...)); 1194 /* Function to abort with message */ 1195 { 1196 if (OP_NOP(gn->type) && Lst_IsEmpty(gn->commands) && 1197 (gn->type & OP_LIB) == 0) { 1198 /* 1199 * No commands. Look for .DEFAULT rule from which we might infer 1200 * commands 1201 */ 1202 if ((DEFAULT != NILGNODE) && !Lst_IsEmpty(DEFAULT->commands)) { 1203 char *p1; 1204 /* 1205 * Make only looks for a .DEFAULT if the node was never the 1206 * target of an operator, so that's what we do too. If 1207 * a .DEFAULT was given, we substitute its commands for gn's 1208 * commands and set the IMPSRC variable to be the target's name 1209 * The DEFAULT node acts like a transformation rule, in that 1210 * gn also inherits any attributes or sources attached to 1211 * .DEFAULT itself. 1212 */ 1213 Make_HandleUse(DEFAULT, gn); 1214 Var_Set(IMPSRC, Var_Value(TARGET, gn, &p1), gn, 0); 1215 if (p1) 1216 free(p1); 1217 } else if (Dir_MTime(gn) == 0) { 1218 /* 1219 * The node wasn't the target of an operator we have no .DEFAULT 1220 * rule to go on and the target doesn't already exist. There's 1221 * nothing more we can do for this branch. If the -k flag wasn't 1222 * given, we stop in our tracks, otherwise we just don't update 1223 * this node's parents so they never get examined. 1224 */ 1225 static const char msg[] = ": don't know how to make"; 1226 1227 if (gn->type & OP_OPTIONAL) { 1228 (void) fprintf(stdout, "%s%s %s(ignored)\n", progname, 1229 msg, gn->name); 1230 (void) fflush(stdout); 1231 } else if (keepgoing) { 1232 (void) fprintf(stdout, "%s%s %s(continuing)\n", progname, 1233 msg, gn->name); 1234 (void) fflush(stdout); 1235 return FALSE; 1236 } else { 1237 (*abortProc)("%s%s %s. Stop", progname, msg, gn->name); 1238 return FALSE; 1239 } 1240 } 1241 } 1242 return TRUE; 1243 } 1244 #ifdef RMT_WILL_WATCH 1245 /*- 1246 *----------------------------------------------------------------------- 1247 * JobLocalInput -- 1248 * Handle a pipe becoming readable. Callback function for Rmt_Watch 1249 * 1250 * Results: 1251 * None 1252 * 1253 * Side Effects: 1254 * JobDoOutput is called. 1255 * 1256 *----------------------------------------------------------------------- 1257 */ 1258 /*ARGSUSED*/ 1259 static void 1260 JobLocalInput(stream, job) 1261 int stream; /* Stream that's ready (ignored) */ 1262 Job *job; /* Job to which the stream belongs */ 1263 { 1264 JobDoOutput(job, FALSE); 1265 } 1266 #endif /* RMT_WILL_WATCH */ 1267 1268 /*- 1269 *----------------------------------------------------------------------- 1270 * JobExec -- 1271 * Execute the shell for the given job. Called from JobStart and 1272 * JobRestart. 1273 * 1274 * Results: 1275 * None. 1276 * 1277 * Side Effects: 1278 * A shell is executed, outputs is altered and the Job structure added 1279 * to the job table. 1280 * 1281 *----------------------------------------------------------------------- 1282 */ 1283 static void 1284 JobExec(job, argv) 1285 Job *job; /* Job to execute */ 1286 char **argv; 1287 { 1288 int cpid; /* ID of new child */ 1289 1290 job->flags &= ~JOB_TRACED; 1291 1292 if (DEBUG(JOB)) { 1293 int i; 1294 1295 (void) fprintf(stdout, "Running %s %sly\n", job->node->name, 1296 job->flags&JOB_REMOTE?"remote":"local"); 1297 (void) fprintf(stdout, "\tCommand: "); 1298 for (i = 0; argv[i] != NULL; i++) { 1299 (void) fprintf(stdout, "%s ", argv[i]); 1300 } 1301 (void) fprintf(stdout, "\n"); 1302 (void) fflush(stdout); 1303 } 1304 1305 /* 1306 * Some jobs produce no output and it's disconcerting to have 1307 * no feedback of their running (since they produce no output, the 1308 * banner with their name in it never appears). This is an attempt to 1309 * provide that feedback, even if nothing follows it. 1310 */ 1311 if ((lastNode != job->node) && (job->flags & JOB_FIRST) && 1312 !(job->flags & JOB_SILENT)) { 1313 MESSAGE(stdout, job->node); 1314 lastNode = job->node; 1315 } 1316 1317 #ifdef RMT_NO_EXEC 1318 if (job->flags & JOB_REMOTE) { 1319 goto jobExecFinish; 1320 } 1321 #endif /* RMT_NO_EXEC */ 1322 1323 if ((cpid = vfork()) == -1) { 1324 Punt("Cannot vfork: %s", strerror(errno)); 1325 } else if (cpid == 0) { 1326 1327 /* 1328 * Must duplicate the input stream down to the child's input and 1329 * reset it to the beginning (again). Since the stream was marked 1330 * close-on-exec, we must clear that bit in the new input. 1331 */ 1332 if (dup2(FILENO(job->cmdFILE), 0) == -1) 1333 Punt("Cannot dup2: %s", strerror(errno)); 1334 (void) fcntl(0, F_SETFD, 0); 1335 (void) lseek(0, (off_t)0, SEEK_SET); 1336 1337 if (job->node->type & OP_MAKE) { 1338 /* 1339 * Pass job token pipe to submakes. 1340 */ 1341 fcntl(job_pipe[0], F_SETFD, 0); 1342 fcntl(job_pipe[1], F_SETFD, 0); 1343 } 1344 1345 if (usePipes) { 1346 /* 1347 * Set up the child's output to be routed through the pipe 1348 * we've created for it. 1349 */ 1350 if (dup2(job->outPipe, 1) == -1) 1351 Punt("Cannot dup2: %s", strerror(errno)); 1352 } else { 1353 /* 1354 * We're capturing output in a file, so we duplicate the 1355 * descriptor to the temporary file into the standard 1356 * output. 1357 */ 1358 if (dup2(job->outFd, 1) == -1) 1359 Punt("Cannot dup2: %s", strerror(errno)); 1360 } 1361 /* 1362 * The output channels are marked close on exec. This bit was 1363 * duplicated by the dup2 (on some systems), so we have to clear 1364 * it before routing the shell's error output to the same place as 1365 * its standard output. 1366 */ 1367 (void) fcntl(1, F_SETFD, 0); 1368 if (dup2(1, 2) == -1) 1369 Punt("Cannot dup2: %s", strerror(errno)); 1370 1371 #ifdef USE_PGRP 1372 /* 1373 * We want to switch the child into a different process family so 1374 * we can kill it and all its descendants in one fell swoop, 1375 * by killing its process family, but not commit suicide. 1376 */ 1377 # if defined(SYSV) 1378 (void) setsid(); 1379 # else 1380 (void) setpgid(0, getpid()); 1381 # endif 1382 #endif /* USE_PGRP */ 1383 1384 #ifdef REMOTE 1385 if (job->flags & JOB_REMOTE) { 1386 Rmt_Exec(shellPath, argv, FALSE); 1387 } else 1388 #endif /* REMOTE */ 1389 { 1390 (void) execv(shellPath, argv); 1391 execError(shellPath); 1392 } 1393 _exit(1); 1394 } else { 1395 #ifdef REMOTE 1396 sigset_t nmask, omask; 1397 sigemptyset(&nmask); 1398 sigaddset(&nmask, SIGCHLD); 1399 sigprocmask(SIG_BLOCK, &nmask, &omask); 1400 #endif 1401 job->pid = cpid; 1402 1403 Trace_Log(JOBSTART, job); 1404 1405 if (usePipes && (job->flags & JOB_FIRST)) { 1406 /* 1407 * The first time a job is run for a node, we set the current 1408 * position in the buffer to the beginning and mark another 1409 * stream to watch in the outputs mask 1410 */ 1411 job->curPos = 0; 1412 1413 #ifdef RMT_WILL_WATCH 1414 Rmt_Watch(job->inPipe, JobLocalInput, job); 1415 #else 1416 #ifdef USE_SELECT 1417 FD_SET(job->inPipe, &outputs); 1418 #else 1419 watchfd(job); 1420 #endif 1421 #endif /* RMT_WILL_WATCH */ 1422 } 1423 1424 if (job->flags & JOB_REMOTE) { 1425 #ifndef REMOTE 1426 job->rmtID = 0; 1427 #else 1428 job->rmtID = Rmt_LastID(job->pid); 1429 #endif /* REMOTE */ 1430 } else { 1431 nLocal += 1; 1432 /* 1433 * XXX: Used to not happen if REMOTE. Why? 1434 */ 1435 if (job->cmdFILE != NULL && job->cmdFILE != stdout) { 1436 (void) fclose(job->cmdFILE); 1437 job->cmdFILE = NULL; 1438 } 1439 } 1440 #ifdef REMOTE 1441 sigprocmask(SIG_SETMASK, &omask, NULL); 1442 #endif 1443 } 1444 1445 #ifdef RMT_NO_EXEC 1446 jobExecFinish: 1447 #endif 1448 /* 1449 * Now the job is actually running, add it to the table. 1450 */ 1451 nJobs += 1; 1452 (void) Lst_AtEnd(jobs, (ClientData)job); 1453 } 1454 1455 /*- 1456 *----------------------------------------------------------------------- 1457 * JobMakeArgv -- 1458 * Create the argv needed to execute the shell for a given job. 1459 * 1460 * 1461 * Results: 1462 * 1463 * Side Effects: 1464 * 1465 *----------------------------------------------------------------------- 1466 */ 1467 static void 1468 JobMakeArgv(job, argv) 1469 Job *job; 1470 char **argv; 1471 { 1472 int argc; 1473 static char args[10]; /* For merged arguments */ 1474 1475 argv[0] = shellName; 1476 argc = 1; 1477 1478 if ((commandShell->exit && (*commandShell->exit != '-')) || 1479 (commandShell->echo && (*commandShell->echo != '-'))) 1480 { 1481 /* 1482 * At least one of the flags doesn't have a minus before it, so 1483 * merge them together. Have to do this because the *(&(@*#*&#$# 1484 * Bourne shell thinks its second argument is a file to source. 1485 * Grrrr. Note the ten-character limitation on the combined arguments. 1486 */ 1487 (void)snprintf(args, sizeof(args), "-%s%s", 1488 ((job->flags & JOB_IGNERR) ? "" : 1489 (commandShell->exit ? commandShell->exit : "")), 1490 ((job->flags & JOB_SILENT) ? "" : 1491 (commandShell->echo ? commandShell->echo : ""))); 1492 1493 if (args[1]) { 1494 argv[argc] = args; 1495 argc++; 1496 } 1497 } else { 1498 if (!(job->flags & JOB_IGNERR) && commandShell->exit) { 1499 argv[argc] = commandShell->exit; 1500 argc++; 1501 } 1502 if (!(job->flags & JOB_SILENT) && commandShell->echo) { 1503 argv[argc] = commandShell->echo; 1504 argc++; 1505 } 1506 } 1507 argv[argc] = NULL; 1508 } 1509 1510 /*- 1511 *----------------------------------------------------------------------- 1512 * JobRestart -- 1513 * Restart a job that stopped for some reason. 1514 * 1515 * Results: 1516 * None. 1517 * 1518 *----------------------------------------------------------------------- 1519 */ 1520 static void 1521 JobRestart(job) 1522 Job *job; /* Job to restart */ 1523 { 1524 #ifdef REMOTE 1525 int host; 1526 #endif 1527 1528 if (job->flags & JOB_REMIGRATE) { 1529 if ( 1530 #ifdef REMOTE 1531 verboseRemigrates || 1532 #endif 1533 DEBUG(JOB)) { 1534 (void) fprintf(stdout, "*** remigrating %x(%s)\n", 1535 job->pid, job->node->name); 1536 (void) fflush(stdout); 1537 } 1538 1539 #ifdef REMOTE 1540 if (!Rmt_ReExport(job->pid, job->node, &host)) { 1541 if (verboseRemigrates || DEBUG(JOB)) { 1542 (void) fprintf(stdout, "*** couldn't migrate...\n"); 1543 (void) fflush(stdout); 1544 } 1545 #endif 1546 if (nLocal != maxLocal) { 1547 /* 1548 * Job cannot be remigrated, but there's room on the local 1549 * machine, so resume the job and note that another 1550 * local job has started. 1551 */ 1552 if ( 1553 #ifdef REMOTE 1554 verboseRemigrates || 1555 #endif 1556 DEBUG(JOB)) { 1557 (void) fprintf(stdout, "*** resuming on local machine\n"); 1558 (void) fflush(stdout); 1559 } 1560 KILL(job->pid, SIGCONT); 1561 nLocal +=1; 1562 #ifdef REMOTE 1563 job->flags &= ~(JOB_REMIGRATE|JOB_RESUME|JOB_REMOTE); 1564 job->flags |= JOB_CONTINUING; 1565 #else 1566 job->flags &= ~(JOB_REMIGRATE|JOB_RESUME); 1567 #endif 1568 } else { 1569 /* 1570 * Job cannot be restarted. Mark the table as full and 1571 * place the job back on the list of stopped jobs. 1572 */ 1573 if ( 1574 #ifdef REMOTE 1575 verboseRemigrates || 1576 #endif 1577 DEBUG(JOB)) { 1578 (void) fprintf(stdout, "*** holding\n"); 1579 (void) fflush(stdout); 1580 } 1581 (void)Lst_AtFront(stoppedJobs, (ClientData)job); 1582 return; 1583 } 1584 #ifdef REMOTE 1585 } else { 1586 /* 1587 * Clear out the remigrate and resume flags. Set the continuing 1588 * flag so we know later on that the process isn't exiting just 1589 * because of a signal. 1590 */ 1591 job->flags &= ~(JOB_REMIGRATE|JOB_RESUME); 1592 job->flags |= JOB_CONTINUING; 1593 job->rmtID = host; 1594 } 1595 #endif 1596 1597 (void)Lst_AtEnd(jobs, (ClientData)job); 1598 nJobs += 1; 1599 } else if (job->flags & JOB_RESTART) { 1600 /* 1601 * Set up the control arguments to the shell. This is based on the 1602 * flags set earlier for this job. If the JOB_IGNERR flag is clear, 1603 * the 'exit' flag of the commandShell is used to cause it to exit 1604 * upon receiving an error. If the JOB_SILENT flag is clear, the 1605 * 'echo' flag of the commandShell is used to get it to start echoing 1606 * as soon as it starts processing commands. 1607 */ 1608 char *argv[10]; 1609 1610 JobMakeArgv(job, argv); 1611 1612 if (DEBUG(JOB)) { 1613 (void) fprintf(stdout, "Restarting %s...", job->node->name); 1614 (void) fflush(stdout); 1615 } 1616 #ifdef REMOTE 1617 if ((job->node->type&OP_NOEXPORT) || 1618 (nLocal < maxLocal && runLocalFirst) 1619 # ifdef RMT_NO_EXEC 1620 || !Rmt_Export(shellPath, argv, job) 1621 # else 1622 || !Rmt_Begin(shellPath, argv, job->node) 1623 # endif 1624 #endif 1625 { 1626 if (((nLocal >= maxLocal) && !(job->flags & JOB_SPECIAL))) { 1627 /* 1628 * Can't be exported and not allowed to run locally -- put it 1629 * back on the hold queue and mark the table full 1630 */ 1631 if (DEBUG(JOB)) { 1632 (void) fprintf(stdout, "holding\n"); 1633 (void) fflush(stdout); 1634 } 1635 (void)Lst_AtFront(stoppedJobs, (ClientData)job); 1636 return; 1637 } else { 1638 /* 1639 * Job may be run locally. 1640 */ 1641 if (DEBUG(JOB)) { 1642 (void) fprintf(stdout, "running locally\n"); 1643 (void) fflush(stdout); 1644 } 1645 job->flags &= ~JOB_REMOTE; 1646 } 1647 } 1648 #ifdef REMOTE 1649 else { 1650 /* 1651 * Can be exported. Hooray! 1652 */ 1653 if (DEBUG(JOB)) { 1654 (void) fprintf(stdout, "exporting\n"); 1655 (void) fflush(stdout); 1656 } 1657 job->flags |= JOB_REMOTE; 1658 } 1659 #endif 1660 JobExec(job, argv); 1661 } else { 1662 /* 1663 * The job has stopped and needs to be restarted. Why it stopped, 1664 * we don't know... 1665 */ 1666 if (DEBUG(JOB)) { 1667 (void) fprintf(stdout, "Resuming %s...", job->node->name); 1668 (void) fflush(stdout); 1669 } 1670 if (((job->flags & JOB_REMOTE) || 1671 (nLocal < maxLocal) || 1672 #ifdef REMOTE 1673 (((job->flags & JOB_SPECIAL) && 1674 (job->node->type & OP_NOEXPORT)) && 1675 (maxLocal == 0))) && 1676 #else 1677 ((job->flags & JOB_SPECIAL) && 1678 (maxLocal == 0))) && 1679 #endif 1680 (nJobs != maxJobs)) 1681 { 1682 /* 1683 * If the job is remote, it's ok to resume it as long as the 1684 * maximum concurrency won't be exceeded. If it's local and 1685 * we haven't reached the local concurrency limit already (or the 1686 * job must be run locally and maxLocal is 0), it's also ok to 1687 * resume it. 1688 */ 1689 Boolean error; 1690 int status; 1691 1692 #ifdef RMT_WANTS_SIGNALS 1693 if (job->flags & JOB_REMOTE) { 1694 error = !Rmt_Signal(job, SIGCONT); 1695 } else 1696 #endif /* RMT_WANTS_SIGNALS */ 1697 error = (KILL(job->pid, SIGCONT) != 0); 1698 1699 if (!error) { 1700 /* 1701 * Make sure the user knows we've continued the beast and 1702 * actually put the thing in the job table. 1703 */ 1704 job->flags |= JOB_CONTINUING; 1705 status = W_STOPCODE(SIGCONT); 1706 JobFinish(job, &status); 1707 1708 job->flags &= ~(JOB_RESUME|JOB_CONTINUING); 1709 if (DEBUG(JOB)) { 1710 (void) fprintf(stdout, "done\n"); 1711 (void) fflush(stdout); 1712 } 1713 } else { 1714 Error("couldn't resume %s: %s", 1715 job->node->name, strerror(errno)); 1716 status = W_EXITCODE(1, 0); 1717 JobFinish(job, &status); 1718 } 1719 } else { 1720 /* 1721 * Job cannot be restarted. Mark the table as full and 1722 * place the job back on the list of stopped jobs. 1723 */ 1724 if (DEBUG(JOB)) { 1725 (void) fprintf(stdout, "table full\n"); 1726 (void) fflush(stdout); 1727 } 1728 (void) Lst_AtFront(stoppedJobs, (ClientData)job); 1729 } 1730 } 1731 } 1732 1733 /*- 1734 *----------------------------------------------------------------------- 1735 * JobStart -- 1736 * Start a target-creation process going for the target described 1737 * by the graph node gn. 1738 * 1739 * Results: 1740 * JOB_ERROR if there was an error in the commands, JOB_FINISHED 1741 * if there isn't actually anything left to do for the job and 1742 * JOB_RUNNING if the job has been started. 1743 * 1744 * Side Effects: 1745 * A new Job node is created and added to the list of running 1746 * jobs. PMake is forked and a child shell created. 1747 *----------------------------------------------------------------------- 1748 */ 1749 static int 1750 JobStart(gn, flags, previous) 1751 GNode *gn; /* target to create */ 1752 int flags; /* flags for the job to override normal ones. 1753 * e.g. JOB_SPECIAL or JOB_IGNDOTS */ 1754 Job *previous; /* The previous Job structure for this node, 1755 * if any. */ 1756 { 1757 register Job *job; /* new job descriptor */ 1758 char *argv[10]; /* Argument vector to shell */ 1759 Boolean cmdsOK; /* true if the nodes commands were all right */ 1760 Boolean local; /* Set true if the job was run locally */ 1761 Boolean noExec; /* Set true if we decide not to run the job */ 1762 int tfd; /* File descriptor to the temp file */ 1763 1764 if (previous != NULL) { 1765 previous->flags &= ~(JOB_FIRST|JOB_IGNERR|JOB_SILENT|JOB_REMOTE); 1766 job = previous; 1767 } else { 1768 job = (Job *) emalloc(sizeof(Job)); 1769 if (job == NULL) { 1770 Punt("JobStart out of memory"); 1771 } 1772 flags |= JOB_FIRST; 1773 } 1774 1775 job->node = gn; 1776 job->tailCmds = NILLNODE; 1777 1778 /* 1779 * Set the initial value of the flags for this job based on the global 1780 * ones and the node's attributes... Any flags supplied by the caller 1781 * are also added to the field. 1782 */ 1783 job->flags = 0; 1784 if (Targ_Ignore(gn)) { 1785 job->flags |= JOB_IGNERR; 1786 } 1787 if (Targ_Silent(gn)) { 1788 job->flags |= JOB_SILENT; 1789 } 1790 job->flags |= flags; 1791 1792 /* 1793 * Check the commands now so any attributes from .DEFAULT have a chance 1794 * to migrate to the node 1795 */ 1796 if (!compatMake && job->flags & JOB_FIRST) { 1797 cmdsOK = Job_CheckCommands(gn, Error); 1798 } else { 1799 cmdsOK = TRUE; 1800 } 1801 1802 #ifndef RMT_WILL_WATCH 1803 #ifndef USE_SELECT 1804 job->inPollfd = NULL; 1805 #endif 1806 #endif 1807 /* 1808 * If the -n flag wasn't given, we open up OUR (not the child's) 1809 * temporary file to stuff commands in it. The thing is rd/wr so we don't 1810 * need to reopen it to feed it to the shell. If the -n flag *was* given, 1811 * we just set the file to be stdout. Cute, huh? 1812 */ 1813 if (((gn->type & OP_MAKE) && !(noRecursiveExecute)) || 1814 (!noExecute && !touchFlag)) { 1815 /* 1816 * tfile is the name of a file into which all shell commands are 1817 * put. It is used over by removing it before the child shell is 1818 * executed. The XXXXXX in the string are replaced by the pid of 1819 * the make process in a 6-character field with leading zeroes. 1820 */ 1821 char tfile[sizeof(TMPPAT)]; 1822 /* 1823 * We're serious here, but if the commands were bogus, we're 1824 * also dead... 1825 */ 1826 if (!cmdsOK) { 1827 DieHorribly(); 1828 } 1829 1830 (void)strcpy(tfile, TMPPAT); 1831 if ((tfd = mkstemp(tfile)) == -1) 1832 Punt("Could not create temporary file %s", strerror(errno)); 1833 (void) eunlink(tfile); 1834 1835 job->cmdFILE = fdopen(tfd, "w+"); 1836 if (job->cmdFILE == NULL) { 1837 Punt("Could not fdopen %s", tfile); 1838 } 1839 (void) fcntl(FILENO(job->cmdFILE), F_SETFD, 1); 1840 /* 1841 * Send the commands to the command file, flush all its buffers then 1842 * rewind and remove the thing. 1843 */ 1844 noExec = FALSE; 1845 1846 /* 1847 * used to be backwards; replace when start doing multiple commands 1848 * per shell. 1849 */ 1850 if (compatMake) { 1851 /* 1852 * Be compatible: If this is the first time for this node, 1853 * verify its commands are ok and open the commands list for 1854 * sequential access by later invocations of JobStart. 1855 * Once that is done, we take the next command off the list 1856 * and print it to the command file. If the command was an 1857 * ellipsis, note that there's nothing more to execute. 1858 */ 1859 if ((job->flags&JOB_FIRST) && (Lst_Open(gn->commands) != SUCCESS)){ 1860 cmdsOK = FALSE; 1861 } else { 1862 LstNode ln = Lst_Next(gn->commands); 1863 1864 if ((ln == NILLNODE) || 1865 JobPrintCommand((ClientData) Lst_Datum(ln), 1866 (ClientData) job)) 1867 { 1868 noExec = TRUE; 1869 Lst_Close(gn->commands); 1870 } 1871 if (noExec && !(job->flags & JOB_FIRST)) { 1872 /* 1873 * If we're not going to execute anything, the job 1874 * is done and we need to close down the various 1875 * file descriptors we've opened for output, then 1876 * call JobDoOutput to catch the final characters or 1877 * send the file to the screen... Note that the i/o streams 1878 * are only open if this isn't the first job. 1879 * Note also that this could not be done in 1880 * Job_CatchChildren b/c it wasn't clear if there were 1881 * more commands to execute or not... 1882 */ 1883 JobClose(job); 1884 } 1885 } 1886 } else { 1887 /* 1888 * We can do all the commands at once. hooray for sanity 1889 */ 1890 numCommands = 0; 1891 Lst_ForEach(gn->commands, JobPrintCommand, (ClientData)job); 1892 1893 /* 1894 * If we didn't print out any commands to the shell script, 1895 * there's not much point in executing the shell, is there? 1896 */ 1897 if (numCommands == 0) { 1898 noExec = TRUE; 1899 } 1900 } 1901 } else if (NoExecute(gn)) { 1902 /* 1903 * Not executing anything -- just print all the commands to stdout 1904 * in one fell swoop. This will still set up job->tailCmds correctly. 1905 */ 1906 if (lastNode != gn) { 1907 MESSAGE(stdout, gn); 1908 lastNode = gn; 1909 } 1910 job->cmdFILE = stdout; 1911 /* 1912 * Only print the commands if they're ok, but don't die if they're 1913 * not -- just let the user know they're bad and keep going. It 1914 * doesn't do any harm in this case and may do some good. 1915 */ 1916 if (cmdsOK) { 1917 Lst_ForEach(gn->commands, JobPrintCommand, (ClientData)job); 1918 } 1919 /* 1920 * Don't execute the shell, thank you. 1921 */ 1922 noExec = TRUE; 1923 } else { 1924 /* 1925 * Just touch the target and note that no shell should be executed. 1926 * Set cmdFILE to stdout to make life easier. Check the commands, too, 1927 * but don't die if they're no good -- it does no harm to keep working 1928 * up the graph. 1929 */ 1930 job->cmdFILE = stdout; 1931 Job_Touch(gn, job->flags&JOB_SILENT); 1932 noExec = TRUE; 1933 } 1934 1935 /* 1936 * If we're not supposed to execute a shell, don't. 1937 */ 1938 if (noExec) { 1939 /* 1940 * Unlink and close the command file if we opened one 1941 */ 1942 if (job->cmdFILE != stdout) { 1943 if (job->cmdFILE != NULL) { 1944 (void) fclose(job->cmdFILE); 1945 job->cmdFILE = NULL; 1946 } 1947 } else { 1948 (void) fflush(stdout); 1949 } 1950 1951 /* 1952 * We only want to work our way up the graph if we aren't here because 1953 * the commands for the job were no good. 1954 */ 1955 if (cmdsOK) { 1956 if (aborting == 0) { 1957 if (job->tailCmds != NILLNODE) { 1958 Lst_ForEachFrom(job->node->commands, job->tailCmds, 1959 JobSaveCommand, 1960 (ClientData)job->node); 1961 } 1962 if (!(job->flags & JOB_SPECIAL)) 1963 Job_TokenReturn(); 1964 Make_Update(job->node); 1965 } 1966 free((Address)job); 1967 return(JOB_FINISHED); 1968 } else { 1969 free((Address)job); 1970 return(JOB_ERROR); 1971 } 1972 } else { 1973 (void) fflush(job->cmdFILE); 1974 } 1975 1976 /* 1977 * Set up the control arguments to the shell. This is based on the flags 1978 * set earlier for this job. 1979 */ 1980 JobMakeArgv(job, argv); 1981 1982 /* 1983 * If we're using pipes to catch output, create the pipe by which we'll 1984 * get the shell's output. If we're using files, print out that we're 1985 * starting a job and then set up its temporary-file name. 1986 */ 1987 if (!compatMake || (job->flags & JOB_FIRST)) { 1988 if (usePipes) { 1989 int fd[2]; 1990 if (pipe(fd) == -1) 1991 Punt("Cannot create pipe: %s", strerror(errno)); 1992 job->inPipe = fd[0]; 1993 #ifdef USE_SELECT 1994 if (job->inPipe >= FD_SETSIZE) 1995 Punt("Ran out of fd_set slots; " 1996 "recompile with a larger FD_SETSIZE."); 1997 #endif 1998 job->outPipe = fd[1]; 1999 (void) fcntl(job->inPipe, F_SETFD, 1); 2000 (void) fcntl(job->outPipe, F_SETFD, 1); 2001 } else { 2002 (void) fprintf(stdout, "Remaking `%s'\n", gn->name); 2003 (void) fflush(stdout); 2004 (void) strcpy(job->outFile, TMPPAT); 2005 job->outFd = mkstemp(job->outFile); 2006 (void) fcntl(job->outFd, F_SETFD, 1); 2007 } 2008 } 2009 2010 #ifdef REMOTE 2011 if (!(gn->type & OP_NOEXPORT) && !(runLocalFirst && nLocal < maxLocal)) { 2012 #ifdef RMT_NO_EXEC 2013 local = !Rmt_Export(shellPath, argv, job); 2014 #else 2015 local = !Rmt_Begin(shellPath, argv, job->node); 2016 #endif /* RMT_NO_EXEC */ 2017 if (!local) { 2018 job->flags |= JOB_REMOTE; 2019 } 2020 } else 2021 #endif 2022 local = TRUE; 2023 2024 if (local && (((nLocal >= maxLocal) && 2025 !(job->flags & JOB_SPECIAL) && 2026 #ifdef REMOTE 2027 (!(gn->type & OP_NOEXPORT) || (maxLocal != 0)) 2028 #else 2029 (maxLocal != 0) 2030 #endif 2031 ))) 2032 { 2033 /* 2034 * The job can only be run locally, but we've hit the limit of 2035 * local concurrency, so put the job on hold until some other job 2036 * finishes. Note that the special jobs (.BEGIN, .INTERRUPT and .END) 2037 * may be run locally even when the local limit has been reached 2038 * (e.g. when maxLocal == 0), though they will be exported if at 2039 * all possible. In addition, any target marked with .NOEXPORT will 2040 * be run locally if maxLocal is 0. 2041 */ 2042 job->flags |= JOB_RESTART; 2043 (void) Lst_AtEnd(stoppedJobs, (ClientData)job); 2044 } else { 2045 JobExec(job, argv); 2046 } 2047 return(JOB_RUNNING); 2048 } 2049 2050 static char * 2051 JobOutput(job, cp, endp, msg) 2052 register Job *job; 2053 register char *cp, *endp; 2054 int msg; 2055 { 2056 register char *ecp; 2057 2058 if (commandShell->noPrint) { 2059 ecp = Str_FindSubstring(cp, commandShell->noPrint); 2060 while (ecp != NULL) { 2061 if (cp != ecp) { 2062 *ecp = '\0'; 2063 if (msg && job->node != lastNode) { 2064 MESSAGE(stdout, job->node); 2065 lastNode = job->node; 2066 } 2067 /* 2068 * The only way there wouldn't be a newline after 2069 * this line is if it were the last in the buffer. 2070 * however, since the non-printable comes after it, 2071 * there must be a newline, so we don't print one. 2072 */ 2073 (void) fprintf(stdout, "%s", cp); 2074 (void) fflush(stdout); 2075 } 2076 cp = ecp + commandShell->noPLen; 2077 if (cp != endp) { 2078 /* 2079 * Still more to print, look again after skipping 2080 * the whitespace following the non-printable 2081 * command.... 2082 */ 2083 cp++; 2084 while (*cp == ' ' || *cp == '\t' || *cp == '\n') { 2085 cp++; 2086 } 2087 ecp = Str_FindSubstring(cp, commandShell->noPrint); 2088 } else { 2089 return cp; 2090 } 2091 } 2092 } 2093 return cp; 2094 } 2095 2096 /*- 2097 *----------------------------------------------------------------------- 2098 * JobDoOutput -- 2099 * This function is called at different times depending on 2100 * whether the user has specified that output is to be collected 2101 * via pipes or temporary files. In the former case, we are called 2102 * whenever there is something to read on the pipe. We collect more 2103 * output from the given job and store it in the job's outBuf. If 2104 * this makes up a line, we print it tagged by the job's identifier, 2105 * as necessary. 2106 * If output has been collected in a temporary file, we open the 2107 * file and read it line by line, transfering it to our own 2108 * output channel until the file is empty. At which point we 2109 * remove the temporary file. 2110 * In both cases, however, we keep our figurative eye out for the 2111 * 'noPrint' line for the shell from which the output came. If 2112 * we recognize a line, we don't print it. If the command is not 2113 * alone on the line (the character after it is not \0 or \n), we 2114 * do print whatever follows it. 2115 * 2116 * Results: 2117 * None 2118 * 2119 * Side Effects: 2120 * curPos may be shifted as may the contents of outBuf. 2121 *----------------------------------------------------------------------- 2122 */ 2123 STATIC void 2124 JobDoOutput(job, finish) 2125 register Job *job; /* the job whose output needs printing */ 2126 Boolean finish; /* TRUE if this is the last time we'll be 2127 * called for this job */ 2128 { 2129 Boolean gotNL = FALSE; /* true if got a newline */ 2130 Boolean fbuf; /* true if our buffer filled up */ 2131 register int nr; /* number of bytes read */ 2132 register int i; /* auxiliary index into outBuf */ 2133 register int max; /* limit for i (end of current data) */ 2134 int nRead; /* (Temporary) number of bytes read */ 2135 2136 FILE *oFILE; /* Stream pointer to shell's output file */ 2137 char inLine[132]; 2138 2139 2140 if (usePipes) { 2141 /* 2142 * Read as many bytes as will fit in the buffer. 2143 */ 2144 end_loop: 2145 gotNL = FALSE; 2146 fbuf = FALSE; 2147 2148 nRead = read(job->inPipe, &job->outBuf[job->curPos], 2149 JOB_BUFSIZE - job->curPos); 2150 if (nRead < 0) { 2151 if (DEBUG(JOB)) { 2152 perror("JobDoOutput(piperead)"); 2153 } 2154 nr = 0; 2155 } else { 2156 nr = nRead; 2157 } 2158 2159 /* 2160 * If we hit the end-of-file (the job is dead), we must flush its 2161 * remaining output, so pretend we read a newline if there's any 2162 * output remaining in the buffer. 2163 * Also clear the 'finish' flag so we stop looping. 2164 */ 2165 if ((nr == 0) && (job->curPos != 0)) { 2166 job->outBuf[job->curPos] = '\n'; 2167 nr = 1; 2168 finish = FALSE; 2169 } else if (nr == 0) { 2170 finish = FALSE; 2171 } 2172 2173 /* 2174 * Look for the last newline in the bytes we just got. If there is 2175 * one, break out of the loop with 'i' as its index and gotNL set 2176 * TRUE. 2177 */ 2178 max = job->curPos + nr; 2179 for (i = job->curPos + nr - 1; i >= job->curPos; i--) { 2180 if (job->outBuf[i] == '\n') { 2181 gotNL = TRUE; 2182 break; 2183 } else if (job->outBuf[i] == '\0') { 2184 /* 2185 * Why? 2186 */ 2187 job->outBuf[i] = ' '; 2188 } 2189 } 2190 2191 if (!gotNL) { 2192 job->curPos += nr; 2193 if (job->curPos == JOB_BUFSIZE) { 2194 /* 2195 * If we've run out of buffer space, we have no choice 2196 * but to print the stuff. sigh. 2197 */ 2198 fbuf = TRUE; 2199 i = job->curPos; 2200 } 2201 } 2202 if (gotNL || fbuf) { 2203 /* 2204 * Need to send the output to the screen. Null terminate it 2205 * first, overwriting the newline character if there was one. 2206 * So long as the line isn't one we should filter (according 2207 * to the shell description), we print the line, preceded 2208 * by a target banner if this target isn't the same as the 2209 * one for which we last printed something. 2210 * The rest of the data in the buffer are then shifted down 2211 * to the start of the buffer and curPos is set accordingly. 2212 */ 2213 job->outBuf[i] = '\0'; 2214 if (i >= job->curPos) { 2215 char *cp; 2216 2217 cp = JobOutput(job, job->outBuf, &job->outBuf[i], FALSE); 2218 2219 /* 2220 * There's still more in that thar buffer. This time, though, 2221 * we know there's no newline at the end, so we add one of 2222 * our own free will. 2223 */ 2224 if (*cp != '\0') { 2225 if (job->node != lastNode) { 2226 MESSAGE(stdout, job->node); 2227 lastNode = job->node; 2228 } 2229 (void) fprintf(stdout, "%s%s", cp, gotNL ? "\n" : ""); 2230 (void) fflush(stdout); 2231 } 2232 } 2233 if (i < max - 1) { 2234 /* shift the remaining characters down */ 2235 (void) memcpy(job->outBuf, &job->outBuf[i + 1], max - (i + 1)); 2236 job->curPos = max - (i + 1); 2237 2238 } else { 2239 /* 2240 * We have written everything out, so we just start over 2241 * from the start of the buffer. No copying. No nothing. 2242 */ 2243 job->curPos = 0; 2244 } 2245 } 2246 if (finish) { 2247 /* 2248 * If the finish flag is true, we must loop until we hit 2249 * end-of-file on the pipe. This is guaranteed to happen 2250 * eventually since the other end of the pipe is now closed 2251 * (we closed it explicitly and the child has exited). When 2252 * we do get an EOF, finish will be set FALSE and we'll fall 2253 * through and out. 2254 */ 2255 goto end_loop; 2256 } 2257 } else { 2258 /* 2259 * We've been called to retrieve the output of the job from the 2260 * temporary file where it's been squirreled away. This consists of 2261 * opening the file, reading the output line by line, being sure not 2262 * to print the noPrint line for the shell we used, then close and 2263 * remove the temporary file. Very simple. 2264 * 2265 * Change to read in blocks and do FindSubString type things as for 2266 * pipes? That would allow for "@echo -n..." 2267 */ 2268 oFILE = fopen(job->outFile, "r"); 2269 if (oFILE != NULL) { 2270 (void) fprintf(stdout, "Results of making %s:\n", job->node->name); 2271 (void) fflush(stdout); 2272 while (fgets(inLine, sizeof(inLine), oFILE) != NULL) { 2273 register char *cp, *endp, *oendp; 2274 2275 cp = inLine; 2276 oendp = endp = inLine + strlen(inLine); 2277 if (endp[-1] == '\n') { 2278 *--endp = '\0'; 2279 } 2280 cp = JobOutput(job, inLine, endp, FALSE); 2281 2282 /* 2283 * There's still more in that thar buffer. This time, though, 2284 * we know there's no newline at the end, so we add one of 2285 * our own free will. 2286 */ 2287 (void) fprintf(stdout, "%s", cp); 2288 (void) fflush(stdout); 2289 if (endp != oendp) { 2290 (void) fprintf(stdout, "\n"); 2291 (void) fflush(stdout); 2292 } 2293 } 2294 (void) fclose(oFILE); 2295 (void) eunlink(job->outFile); 2296 } else { 2297 Punt("Cannot open `%s'", job->outFile); 2298 } 2299 } 2300 } 2301 2302 /*- 2303 *----------------------------------------------------------------------- 2304 * Job_CatchChildren -- 2305 * Handle the exit of a child. Called from Make_Make. 2306 * 2307 * Results: 2308 * none. 2309 * 2310 * Side Effects: 2311 * The job descriptor is removed from the list of children. 2312 * 2313 * Notes: 2314 * We do waits, blocking or not, according to the wisdom of our 2315 * caller, until there are no more children to report. For each 2316 * job, call JobFinish to finish things off. This will take care of 2317 * putting jobs on the stoppedJobs queue. 2318 * 2319 *----------------------------------------------------------------------- 2320 */ 2321 void 2322 Job_CatchChildren(block) 2323 Boolean block; /* TRUE if should block on the wait. */ 2324 { 2325 int pid; /* pid of dead child */ 2326 register Job *job; /* job descriptor for dead child */ 2327 LstNode jnode; /* list element for finding job */ 2328 int status; /* Exit/termination status */ 2329 2330 /* 2331 * Don't even bother if we know there's no one around. 2332 */ 2333 if (nLocal == 0) { 2334 return; 2335 } 2336 2337 while ((pid = waitpid((pid_t) -1, &status, 2338 (block?0:WNOHANG)|WUNTRACED)) > 0) 2339 { 2340 if (DEBUG(JOB)) { 2341 (void) fprintf(stdout, "Process %d exited or stopped %x.\n", pid, 2342 status); 2343 (void) fflush(stdout); 2344 } 2345 2346 2347 jnode = Lst_Find(jobs, (ClientData)&pid, JobCmpPid); 2348 2349 if (jnode == NILLNODE) { 2350 if (WIFSTOPPED(status) && (WSTOPSIG(status) == SIGCONT)) { 2351 jnode = Lst_Find(stoppedJobs, (ClientData) &pid, JobCmpPid); 2352 if (jnode == NILLNODE) { 2353 Error("Resumed child (%d) not in table", pid); 2354 continue; 2355 } 2356 job = (Job *)Lst_Datum(jnode); 2357 (void) Lst_Remove(stoppedJobs, jnode); 2358 } else { 2359 Error("Child (%d) not in table?", pid); 2360 continue; 2361 } 2362 } else { 2363 job = (Job *) Lst_Datum(jnode); 2364 (void) Lst_Remove(jobs, jnode); 2365 nJobs -= 1; 2366 #ifdef REMOTE 2367 if (!(job->flags & JOB_REMOTE)) { 2368 if (DEBUG(JOB)) { 2369 (void) fprintf(stdout, 2370 "Job queue has one fewer local process.\n"); 2371 (void) fflush(stdout); 2372 } 2373 nLocal -= 1; 2374 } 2375 #else 2376 nLocal -= 1; 2377 #endif 2378 } 2379 2380 JobFinish(job, &status); 2381 } 2382 } 2383 2384 /*- 2385 *----------------------------------------------------------------------- 2386 * Job_CatchOutput -- 2387 * Catch the output from our children, if we're using 2388 * pipes do so. Otherwise just block time until we get a 2389 * signal (most likely a SIGCHLD) since there's no point in 2390 * just spinning when there's nothing to do and the reaping 2391 * of a child can wait for a while. 2392 * 2393 * Results: 2394 * None 2395 * 2396 * Side Effects: 2397 * Output is read from pipes if we're piping. 2398 * ----------------------------------------------------------------------- 2399 */ 2400 void 2401 Job_CatchOutput() 2402 { 2403 int nready; 2404 register LstNode ln; 2405 register Job *job; 2406 #ifdef RMT_WILL_WATCH 2407 int pnJobs; /* Previous nJobs */ 2408 #endif 2409 2410 (void) fflush(stdout); 2411 Job_TokenFlush(); 2412 #ifdef RMT_WILL_WATCH 2413 pnJobs = nJobs; 2414 2415 /* 2416 * It is possible for us to be called with nJobs equal to 0. This happens 2417 * if all the jobs finish and a job that is stopped cannot be run 2418 * locally (eg if maxLocal is 0) and cannot be exported. The job will 2419 * be placed back on the stoppedJobs queue, Job_Empty() will return false, 2420 * Make_Run will call us again when there's nothing for which to wait. 2421 * nJobs never changes, so we loop forever. Hence the check. It could 2422 * be argued that we should sleep for a bit so as not to swamp the 2423 * exportation system with requests. Perhaps we should. 2424 * 2425 * NOTE: IT IS THE RESPONSIBILITY OF Rmt_Wait TO CALL Job_CatchChildren 2426 * IN A TIMELY FASHION TO CATCH ANY LOCALLY RUNNING JOBS THAT EXIT. 2427 * It may use the variable nLocal to determine if it needs to call 2428 * Job_CatchChildren (if nLocal is 0, there's nothing for which to 2429 * wait...) 2430 */ 2431 while (nJobs != 0 && pnJobs == nJobs) { 2432 Rmt_Wait(); 2433 } 2434 #else 2435 if (usePipes) { 2436 #ifdef USE_SELECT 2437 struct timeval timeout; 2438 fd_set readfds; 2439 2440 readfds = outputs; 2441 timeout.tv_sec = SEL_SEC; 2442 timeout.tv_usec = SEL_USEC; 2443 2444 if ((nready = select(FD_SETSIZE, &readfds, (fd_set *) 0, 2445 (fd_set *) 0, &timeout)) <= 0) 2446 return; 2447 #else 2448 if ((nready = poll((wantToken ? fds : (fds + 1)), 2449 (wantToken ? nfds : (nfds - 1)), POLL_MSEC)) <= 0) 2450 return; 2451 #endif 2452 else { 2453 if (Lst_Open(jobs) == FAILURE) { 2454 Punt("Cannot open job table"); 2455 } 2456 while (nready && (ln = Lst_Next(jobs)) != NILLNODE) { 2457 job = (Job *) Lst_Datum(ln); 2458 #ifdef USE_SELECT 2459 if (FD_ISSET(job->inPipe, &readfds)) 2460 #else 2461 if (readyfd(job)) 2462 #endif 2463 { 2464 JobDoOutput(job, FALSE); 2465 nready -= 1; 2466 } 2467 2468 } 2469 Lst_Close(jobs); 2470 } 2471 } 2472 #endif /* RMT_WILL_WATCH */ 2473 } 2474 2475 /*- 2476 *----------------------------------------------------------------------- 2477 * Job_Make -- 2478 * Start the creation of a target. Basically a front-end for 2479 * JobStart used by the Make module. 2480 * 2481 * Results: 2482 * None. 2483 * 2484 * Side Effects: 2485 * Another job is started. 2486 * 2487 *----------------------------------------------------------------------- 2488 */ 2489 void 2490 Job_Make(gn) 2491 GNode *gn; 2492 { 2493 (void) JobStart(gn, 0, NULL); 2494 } 2495 2496 /*- 2497 *----------------------------------------------------------------------- 2498 * Job_Init -- 2499 * Initialize the process module 2500 * 2501 * Results: 2502 * none 2503 * 2504 * Side Effects: 2505 * lists and counters are initialized 2506 *----------------------------------------------------------------------- 2507 */ 2508 void 2509 Job_Init(maxproc, maxlocal) 2510 int maxproc; /* the greatest number of jobs which may be 2511 * running at one time */ 2512 int maxlocal; /* the greatest number of local jobs which may 2513 * be running at once. */ 2514 { 2515 GNode *begin; /* node for commands to do at the very start */ 2516 2517 jobs = Lst_Init(FALSE); 2518 stoppedJobs = Lst_Init(FALSE); 2519 maxJobs = maxproc; 2520 maxLocal = maxlocal; 2521 nJobs = 0; 2522 nLocal = 0; 2523 wantToken = FALSE; 2524 2525 aborting = 0; 2526 errors = 0; 2527 2528 lastNode = NILGNODE; 2529 2530 if (maxJobs == 1 2531 #ifdef REMOTE 2532 || noMessages 2533 #endif 2534 ) { 2535 /* 2536 * If only one job can run at a time, there's no need for a banner, 2537 * is there? 2538 */ 2539 targFmt = ""; 2540 } else { 2541 targFmt = TARG_FMT; 2542 } 2543 2544 if (shellPath == NULL) { 2545 /* 2546 * The user didn't specify a shell to use, so we are using the 2547 * default one... Both the absolute path and the last component 2548 * must be set. The last component is taken from the 'name' field 2549 * of the default shell description pointed-to by commandShell. 2550 * All default shells are located in _PATH_DEFSHELLDIR. 2551 */ 2552 shellName = commandShell->name; 2553 shellPath = str_concat(_PATH_DEFSHELLDIR, shellName, STR_ADDSLASH); 2554 } 2555 2556 if (commandShell->exit == NULL) { 2557 commandShell->exit = ""; 2558 } 2559 if (commandShell->echo == NULL) { 2560 commandShell->echo = ""; 2561 } 2562 2563 /* 2564 * Catch the four signals that POSIX specifies if they aren't ignored. 2565 * JobPassSig will take care of calling JobInterrupt if appropriate. 2566 */ 2567 if (signal(SIGINT, SIG_IGN) != SIG_IGN) { 2568 (void) signal(SIGINT, JobPassSig); 2569 } 2570 if (signal(SIGHUP, SIG_IGN) != SIG_IGN) { 2571 (void) signal(SIGHUP, JobPassSig); 2572 } 2573 if (signal(SIGQUIT, SIG_IGN) != SIG_IGN) { 2574 (void) signal(SIGQUIT, JobPassSig); 2575 } 2576 if (signal(SIGTERM, SIG_IGN) != SIG_IGN) { 2577 (void) signal(SIGTERM, JobPassSig); 2578 } 2579 /* 2580 * Install a NOOP SIGCHLD handler so we are woken up if we're blocked. 2581 */ 2582 signal(SIGCHLD, JobIgnoreSig); 2583 2584 /* 2585 * There are additional signals that need to be caught and passed if 2586 * either the export system wants to be told directly of signals or if 2587 * we're giving each job its own process group (since then it won't get 2588 * signals from the terminal driver as we own the terminal) 2589 */ 2590 #if defined(RMT_WANTS_SIGNALS) || defined(USE_PGRP) 2591 if (signal(SIGTSTP, SIG_IGN) != SIG_IGN) { 2592 (void) signal(SIGTSTP, JobPassSig); 2593 } 2594 if (signal(SIGTTOU, SIG_IGN) != SIG_IGN) { 2595 (void) signal(SIGTTOU, JobPassSig); 2596 } 2597 if (signal(SIGTTIN, SIG_IGN) != SIG_IGN) { 2598 (void) signal(SIGTTIN, JobPassSig); 2599 } 2600 if (signal(SIGWINCH, SIG_IGN) != SIG_IGN) { 2601 (void) signal(SIGWINCH, JobPassSig); 2602 } 2603 if (signal(SIGCONT, SIG_IGN) != SIG_IGN) { 2604 (void) signal(SIGCONT, JobContinueSig); 2605 } 2606 #endif 2607 2608 begin = Targ_FindNode(".BEGIN", TARG_NOCREATE); 2609 2610 if (begin != NILGNODE) { 2611 JobStart(begin, JOB_SPECIAL, (Job *)0); 2612 while (nJobs) { 2613 Job_CatchOutput(); 2614 #ifndef RMT_WILL_WATCH 2615 Job_CatchChildren(!usePipes); 2616 #endif /* RMT_WILL_WATCH */ 2617 } 2618 } 2619 postCommands = Targ_FindNode(".END", TARG_CREATE); 2620 } 2621 2622 /*- 2623 *----------------------------------------------------------------------- 2624 * Job_Empty -- 2625 * See if the job table is empty. Because the local concurrency may 2626 * be set to 0, it is possible for the job table to become empty, 2627 * while the list of stoppedJobs remains non-empty. In such a case, 2628 * we want to restart as many jobs as we can. 2629 * 2630 * Results: 2631 * TRUE if it is. FALSE if it ain't. 2632 * 2633 * Side Effects: 2634 * None. 2635 * 2636 * ----------------------------------------------------------------------- 2637 */ 2638 Boolean 2639 Job_Empty() 2640 { 2641 if (nJobs == 0) { 2642 if (!Lst_IsEmpty(stoppedJobs) && !aborting) { 2643 /* 2644 * The job table is obviously not full if it has no jobs in 2645 * it...Try and restart the stopped jobs. 2646 */ 2647 JobRestartJobs(); 2648 return(FALSE); 2649 } else { 2650 return(TRUE); 2651 } 2652 } else { 2653 return(FALSE); 2654 } 2655 } 2656 2657 /*- 2658 *----------------------------------------------------------------------- 2659 * JobMatchShell -- 2660 * Find a matching shell in 'shells' given its final component. 2661 * 2662 * Results: 2663 * A pointer to the Shell structure. 2664 * 2665 * Side Effects: 2666 * None. 2667 * 2668 *----------------------------------------------------------------------- 2669 */ 2670 static Shell * 2671 JobMatchShell(name) 2672 char *name; /* Final component of shell path */ 2673 { 2674 register Shell *sh; /* Pointer into shells table */ 2675 Shell *match; /* Longest-matching shell */ 2676 register char *cp1, 2677 *cp2; 2678 char *eoname; 2679 2680 eoname = name + strlen(name); 2681 2682 match = NULL; 2683 2684 for (sh = shells; sh->name != NULL; sh++) { 2685 for (cp1 = eoname - strlen(sh->name), cp2 = sh->name; 2686 *cp1 != '\0' && *cp1 == *cp2; 2687 cp1++, cp2++) { 2688 continue; 2689 } 2690 if (*cp1 != *cp2) { 2691 continue; 2692 } else if (match == NULL || strlen(match->name) < strlen(sh->name)) { 2693 match = sh; 2694 } 2695 } 2696 return(match == NULL ? sh : match); 2697 } 2698 2699 /*- 2700 *----------------------------------------------------------------------- 2701 * Job_ParseShell -- 2702 * Parse a shell specification and set up commandShell, shellPath 2703 * and shellName appropriately. 2704 * 2705 * Results: 2706 * FAILURE if the specification was incorrect. 2707 * 2708 * Side Effects: 2709 * commandShell points to a Shell structure (either predefined or 2710 * created from the shell spec), shellPath is the full path of the 2711 * shell described by commandShell, while shellName is just the 2712 * final component of shellPath. 2713 * 2714 * Notes: 2715 * A shell specification consists of a .SHELL target, with dependency 2716 * operator, followed by a series of blank-separated words. Double 2717 * quotes can be used to use blanks in words. A backslash escapes 2718 * anything (most notably a double-quote and a space) and 2719 * provides the functionality it does in C. Each word consists of 2720 * keyword and value separated by an equal sign. There should be no 2721 * unnecessary spaces in the word. The keywords are as follows: 2722 * name Name of shell. 2723 * path Location of shell. Overrides "name" if given 2724 * quiet Command to turn off echoing. 2725 * echo Command to turn echoing on 2726 * filter Result of turning off echoing that shouldn't be 2727 * printed. 2728 * echoFlag Flag to turn echoing on at the start 2729 * errFlag Flag to turn error checking on at the start 2730 * hasErrCtl True if shell has error checking control 2731 * check Command to turn on error checking if hasErrCtl 2732 * is TRUE or template of command to echo a command 2733 * for which error checking is off if hasErrCtl is 2734 * FALSE. 2735 * ignore Command to turn off error checking if hasErrCtl 2736 * is TRUE or template of command to execute a 2737 * command so as to ignore any errors it returns if 2738 * hasErrCtl is FALSE. 2739 * 2740 *----------------------------------------------------------------------- 2741 */ 2742 ReturnStatus 2743 Job_ParseShell(line) 2744 char *line; /* The shell spec */ 2745 { 2746 char **words; 2747 int wordCount; 2748 register char **argv; 2749 register int argc; 2750 char *path; 2751 Shell newShell; 2752 Boolean fullSpec = FALSE; 2753 2754 while (isspace((unsigned char)*line)) { 2755 line++; 2756 } 2757 2758 if (shellArgv) 2759 free(shellArgv); 2760 2761 words = brk_string(line, &wordCount, TRUE, &shellArgv); 2762 2763 memset((Address)&newShell, 0, sizeof(newShell)); 2764 2765 /* 2766 * Parse the specification by keyword 2767 */ 2768 for (path = NULL, argc = wordCount - 1, argv = words; 2769 argc != 0; 2770 argc--, argv++) { 2771 if (strncmp(*argv, "path=", 5) == 0) { 2772 path = &argv[0][5]; 2773 } else if (strncmp(*argv, "name=", 5) == 0) { 2774 newShell.name = &argv[0][5]; 2775 } else { 2776 if (strncmp(*argv, "quiet=", 6) == 0) { 2777 newShell.echoOff = &argv[0][6]; 2778 } else if (strncmp(*argv, "echo=", 5) == 0) { 2779 newShell.echoOn = &argv[0][5]; 2780 } else if (strncmp(*argv, "filter=", 7) == 0) { 2781 newShell.noPrint = &argv[0][7]; 2782 newShell.noPLen = strlen(newShell.noPrint); 2783 } else if (strncmp(*argv, "echoFlag=", 9) == 0) { 2784 newShell.echo = &argv[0][9]; 2785 } else if (strncmp(*argv, "errFlag=", 8) == 0) { 2786 newShell.exit = &argv[0][8]; 2787 } else if (strncmp(*argv, "hasErrCtl=", 10) == 0) { 2788 char c = argv[0][10]; 2789 newShell.hasErrCtl = !((c != 'Y') && (c != 'y') && 2790 (c != 'T') && (c != 't')); 2791 } else if (strncmp(*argv, "check=", 6) == 0) { 2792 newShell.errCheck = &argv[0][6]; 2793 } else if (strncmp(*argv, "ignore=", 7) == 0) { 2794 newShell.ignErr = &argv[0][7]; 2795 } else { 2796 Parse_Error(PARSE_FATAL, "Unknown keyword \"%s\"", 2797 *argv); 2798 free(words); 2799 return(FAILURE); 2800 } 2801 fullSpec = TRUE; 2802 } 2803 } 2804 2805 if (path == NULL) { 2806 /* 2807 * If no path was given, the user wants one of the pre-defined shells, 2808 * yes? So we find the one s/he wants with the help of JobMatchShell 2809 * and set things up the right way. shellPath will be set up by 2810 * Job_Init. 2811 */ 2812 if (newShell.name == NULL) { 2813 Parse_Error(PARSE_FATAL, "Neither path nor name specified"); 2814 return(FAILURE); 2815 } else { 2816 commandShell = JobMatchShell(newShell.name); 2817 shellName = newShell.name; 2818 } 2819 } else { 2820 /* 2821 * The user provided a path. If s/he gave nothing else (fullSpec is 2822 * FALSE), try and find a matching shell in the ones we know of. 2823 * Else we just take the specification at its word and copy it 2824 * to a new location. In either case, we need to record the 2825 * path the user gave for the shell. 2826 */ 2827 shellPath = path; 2828 path = strrchr(path, '/'); 2829 if (path == NULL) { 2830 path = shellPath; 2831 } else { 2832 path += 1; 2833 } 2834 if (newShell.name != NULL) { 2835 shellName = newShell.name; 2836 } else { 2837 shellName = path; 2838 } 2839 if (!fullSpec) { 2840 commandShell = JobMatchShell(shellName); 2841 } else { 2842 commandShell = (Shell *) emalloc(sizeof(Shell)); 2843 *commandShell = newShell; 2844 } 2845 } 2846 2847 if (commandShell->echoOn && commandShell->echoOff) { 2848 commandShell->hasEchoCtl = TRUE; 2849 } 2850 2851 if (!commandShell->hasErrCtl) { 2852 if (commandShell->errCheck == NULL) { 2853 commandShell->errCheck = ""; 2854 } 2855 if (commandShell->ignErr == NULL) { 2856 commandShell->ignErr = "%s\n"; 2857 } 2858 } 2859 2860 /* 2861 * Do not free up the words themselves, since they might be in use by the 2862 * shell specification. 2863 */ 2864 free(words); 2865 return SUCCESS; 2866 } 2867 2868 /*- 2869 *----------------------------------------------------------------------- 2870 * JobInterrupt -- 2871 * Handle the receipt of an interrupt. 2872 * 2873 * Results: 2874 * None 2875 * 2876 * Side Effects: 2877 * All children are killed. Another job will be started if the 2878 * .INTERRUPT target was given. 2879 *----------------------------------------------------------------------- 2880 */ 2881 static void 2882 JobInterrupt(runINTERRUPT, signo) 2883 int runINTERRUPT; /* Non-zero if commands for the .INTERRUPT 2884 * target should be executed */ 2885 int signo; /* signal received */ 2886 { 2887 LstNode ln; /* element in job table */ 2888 Job *job; /* job descriptor in that element */ 2889 GNode *interrupt; /* the node describing the .INTERRUPT target */ 2890 2891 aborting = ABORT_INTERRUPT; 2892 2893 (void) Lst_Open(jobs); 2894 while ((ln = Lst_Next(jobs)) != NILLNODE) { 2895 job = (Job *) Lst_Datum(ln); 2896 2897 if (!Targ_Precious(job->node)) { 2898 char *file = (job->node->path == NULL ? 2899 job->node->name : 2900 job->node->path); 2901 if (!noExecute && eunlink(file) != -1) { 2902 Error("*** %s removed", file); 2903 } 2904 } 2905 #ifdef RMT_WANTS_SIGNALS 2906 if (job->flags & JOB_REMOTE) { 2907 /* 2908 * If job is remote, let the Rmt module do the killing. 2909 */ 2910 if (!Rmt_Signal(job, signo)) { 2911 /* 2912 * If couldn't kill the thing, finish it out now with an 2913 * error code, since no exit report will come in likely. 2914 */ 2915 int status; 2916 2917 status.w_status = 0; 2918 status.w_retcode = 1; 2919 JobFinish(job, &status); 2920 } 2921 } else if (job->pid) { 2922 KILL(job->pid, signo); 2923 } 2924 #else 2925 if (job->pid) { 2926 if (DEBUG(JOB)) { 2927 (void) fprintf(stdout, 2928 "JobInterrupt passing signal to child %d.\n", 2929 job->pid); 2930 (void) fflush(stdout); 2931 } 2932 KILL(job->pid, signo); 2933 } 2934 #endif /* RMT_WANTS_SIGNALS */ 2935 } 2936 2937 #ifdef REMOTE 2938 (void)Lst_Open(stoppedJobs); 2939 while ((ln = Lst_Next(stoppedJobs)) != NILLNODE) { 2940 job = (Job *) Lst_Datum(ln); 2941 2942 if (job->flags & JOB_RESTART) { 2943 if (DEBUG(JOB)) { 2944 (void) fprintf(stdout, "%s%s", 2945 "JobInterrupt skipping job on stopped queue", 2946 "-- it was waiting to be restarted.\n"); 2947 (void) fflush(stdout); 2948 } 2949 continue; 2950 } 2951 if (!Targ_Precious(job->node)) { 2952 char *file = (job->node->path == NULL ? 2953 job->node->name : 2954 job->node->path); 2955 if (eunlink(file) == 0) { 2956 Error("*** %s removed", file); 2957 } 2958 } 2959 /* 2960 * Resume the thing so it will take the signal. 2961 */ 2962 if (DEBUG(JOB)) { 2963 (void) fprintf(stdout, 2964 "JobInterrupt passing CONT to stopped child %d.\n", 2965 job->pid); 2966 (void) fflush(stdout); 2967 } 2968 KILL(job->pid, SIGCONT); 2969 #ifdef RMT_WANTS_SIGNALS 2970 if (job->flags & JOB_REMOTE) { 2971 /* 2972 * If job is remote, let the Rmt module do the killing. 2973 */ 2974 if (!Rmt_Signal(job, SIGINT)) { 2975 /* 2976 * If couldn't kill the thing, finish it out now with an 2977 * error code, since no exit report will come in likely. 2978 */ 2979 int status; 2980 status.w_status = 0; 2981 status.w_retcode = 1; 2982 JobFinish(job, &status); 2983 } 2984 } else if (job->pid) { 2985 if (DEBUG(JOB)) { 2986 (void) fprintf(stdout, 2987 "JobInterrupt passing interrupt to stopped child %d.\n", 2988 job->pid); 2989 (void) fflush(stdout); 2990 } 2991 KILL(job->pid, SIGINT); 2992 } 2993 #endif /* RMT_WANTS_SIGNALS */ 2994 } 2995 #endif 2996 Lst_Close(stoppedJobs); 2997 2998 if (runINTERRUPT && !touchFlag) { 2999 interrupt = Targ_FindNode(".INTERRUPT", TARG_NOCREATE); 3000 if (interrupt != NILGNODE) { 3001 ignoreErrors = FALSE; 3002 3003 JobStart(interrupt, JOB_IGNDOTS, (Job *)0); 3004 while (nJobs) { 3005 Job_CatchOutput(); 3006 #ifndef RMT_WILL_WATCH 3007 Job_CatchChildren(!usePipes); 3008 #endif /* RMT_WILL_WATCH */ 3009 } 3010 } 3011 } 3012 Trace_Log(MAKEINTR, 0); 3013 exit(signo); 3014 } 3015 3016 /* 3017 *----------------------------------------------------------------------- 3018 * Job_Finish -- 3019 * Do final processing such as the running of the commands 3020 * attached to the .END target. 3021 * 3022 * Results: 3023 * Number of errors reported. 3024 * 3025 * Side Effects: 3026 * None. 3027 *----------------------------------------------------------------------- 3028 */ 3029 int 3030 Job_Finish() 3031 { 3032 if (postCommands != NILGNODE && !Lst_IsEmpty(postCommands->commands)) { 3033 if (errors) { 3034 Error("Errors reported so .END ignored"); 3035 } else { 3036 JobStart(postCommands, JOB_SPECIAL | JOB_IGNDOTS, NULL); 3037 3038 while (nJobs) { 3039 Job_CatchOutput(); 3040 #ifndef RMT_WILL_WATCH 3041 Job_CatchChildren(!usePipes); 3042 #endif /* RMT_WILL_WATCH */ 3043 } 3044 } 3045 } 3046 Job_TokenFlush(); 3047 return(errors); 3048 } 3049 3050 /*- 3051 *----------------------------------------------------------------------- 3052 * Job_End -- 3053 * Cleanup any memory used by the jobs module 3054 * 3055 * Results: 3056 * None. 3057 * 3058 * Side Effects: 3059 * Memory is freed 3060 *----------------------------------------------------------------------- 3061 */ 3062 void 3063 Job_End() 3064 { 3065 #ifdef CLEANUP 3066 if (shellArgv) 3067 free(shellArgv); 3068 #endif 3069 } 3070 3071 /*- 3072 *----------------------------------------------------------------------- 3073 * Job_Wait -- 3074 * Waits for all running jobs to finish and returns. Sets 'aborting' 3075 * to ABORT_WAIT to prevent other jobs from starting. 3076 * 3077 * Results: 3078 * None. 3079 * 3080 * Side Effects: 3081 * Currently running jobs finish. 3082 * 3083 *----------------------------------------------------------------------- 3084 */ 3085 void 3086 Job_Wait() 3087 { 3088 aborting = ABORT_WAIT; 3089 while (nJobs != 0) { 3090 Job_CatchOutput(); 3091 #ifndef RMT_WILL_WATCH 3092 Job_CatchChildren(!usePipes); 3093 #endif /* RMT_WILL_WATCH */ 3094 } 3095 Job_TokenFlush(); 3096 aborting = 0; 3097 } 3098 3099 /*- 3100 *----------------------------------------------------------------------- 3101 * Job_AbortAll -- 3102 * Abort all currently running jobs without handling output or anything. 3103 * This function is to be called only in the event of a major 3104 * error. Most definitely NOT to be called from JobInterrupt. 3105 * 3106 * Results: 3107 * None 3108 * 3109 * Side Effects: 3110 * All children are killed, not just the firstborn 3111 *----------------------------------------------------------------------- 3112 */ 3113 void 3114 Job_AbortAll() 3115 { 3116 LstNode ln; /* element in job table */ 3117 Job *job; /* the job descriptor in that element */ 3118 int foo; 3119 3120 aborting = ABORT_ERROR; 3121 3122 if (nJobs) { 3123 3124 (void) Lst_Open(jobs); 3125 while ((ln = Lst_Next(jobs)) != NILLNODE) { 3126 job = (Job *) Lst_Datum(ln); 3127 3128 /* 3129 * kill the child process with increasingly drastic signals to make 3130 * darn sure it's dead. 3131 */ 3132 #ifdef RMT_WANTS_SIGNALS 3133 if (job->flags & JOB_REMOTE) { 3134 Rmt_Signal(job, SIGINT); 3135 Rmt_Signal(job, SIGKILL); 3136 } else { 3137 KILL(job->pid, SIGINT); 3138 KILL(job->pid, SIGKILL); 3139 } 3140 #else 3141 KILL(job->pid, SIGINT); 3142 KILL(job->pid, SIGKILL); 3143 #endif /* RMT_WANTS_SIGNALS */ 3144 } 3145 } 3146 3147 /* 3148 * Catch as many children as want to report in at first, then give up 3149 */ 3150 while (waitpid((pid_t) -1, &foo, WNOHANG) > 0) 3151 continue; 3152 } 3153 3154 #ifdef REMOTE 3155 /*- 3156 *----------------------------------------------------------------------- 3157 * JobFlagForMigration -- 3158 * Handle the eviction of a child. Called from RmtStatusChange. 3159 * Flags the child as remigratable and then suspends it. 3160 * 3161 * Results: 3162 * none. 3163 * 3164 * Side Effects: 3165 * The job descriptor is flagged for remigration. 3166 * 3167 *----------------------------------------------------------------------- 3168 */ 3169 void 3170 JobFlagForMigration(hostID) 3171 int hostID; /* ID of host we used, for matching children. */ 3172 { 3173 register Job *job; /* job descriptor for dead child */ 3174 LstNode jnode; /* list element for finding job */ 3175 3176 if (DEBUG(JOB)) { 3177 (void) fprintf(stdout, "JobFlagForMigration(%d) called.\n", hostID); 3178 (void) fflush(stdout); 3179 } 3180 jnode = Lst_Find(jobs, (ClientData)hostID, JobCmpRmtID); 3181 3182 if (jnode == NILLNODE) { 3183 jnode = Lst_Find(stoppedJobs, (ClientData)hostID, JobCmpRmtID); 3184 if (jnode == NILLNODE) { 3185 if (DEBUG(JOB)) { 3186 Error("Evicting host(%d) not in table", hostID); 3187 } 3188 return; 3189 } 3190 } 3191 job = (Job *) Lst_Datum(jnode); 3192 3193 if (DEBUG(JOB)) { 3194 (void) fprintf(stdout, 3195 "JobFlagForMigration(%d) found job '%s'.\n", hostID, 3196 job->node->name); 3197 (void) fflush(stdout); 3198 } 3199 3200 KILL(job->pid, SIGSTOP); 3201 3202 job->flags |= JOB_REMIGRATE; 3203 } 3204 3205 #endif 3206 3207 /*- 3209 *----------------------------------------------------------------------- 3210 * JobRestartJobs -- 3211 * Tries to restart stopped jobs if there are slots available. 3212 * Note that this tries to restart them regardless of pending errors. 3213 * It's not good to leave stopped jobs lying around! 3214 * 3215 * Results: 3216 * None. 3217 * 3218 * Side Effects: 3219 * Resumes(and possibly migrates) jobs. 3220 * 3221 *----------------------------------------------------------------------- 3222 */ 3223 static void 3224 JobRestartJobs() 3225 { 3226 while (!Lst_IsEmpty(stoppedJobs)) { 3227 if (DEBUG(JOB)) { 3228 (void) fprintf(stdout, "Restarting a stopped job.\n"); 3229 (void) fflush(stdout); 3230 } 3231 JobRestart((Job *)Lst_DeQueue(stoppedJobs)); 3232 } 3233 } 3234 3235 #ifndef RMT_WILL_WATCH 3236 #ifndef USE_SELECT 3237 static void 3238 watchfd(job) 3239 Job *job; 3240 { 3241 int i; 3242 if (job->inPollfd != NULL) 3243 Punt("Watching watched job"); 3244 if (fds == NULL) { 3245 maxfds = JBSTART; 3246 fds = emalloc(sizeof(struct pollfd) * maxfds); 3247 jobfds = emalloc(sizeof(Job **) * maxfds); 3248 3249 fds[0].fd = job_pipe[0]; 3250 fds[0].events = POLLIN; 3251 jobfds[0] = &tokenWaitJob; 3252 tokenWaitJob.inPollfd = &fds[0]; 3253 nfds++; 3254 } else if (nfds == maxfds) { 3255 maxfds *= JBFACTOR; 3256 fds = erealloc(fds, sizeof(struct pollfd) * maxfds); 3257 jobfds = erealloc(jobfds, sizeof(Job **) * maxfds); 3258 for (i = 0; i < nfds; i++) 3259 jobfds[i]->inPollfd = &fds[i]; 3260 } 3261 3262 fds[nfds].fd = job->inPipe; 3263 fds[nfds].events = POLLIN; 3264 jobfds[nfds] = job; 3265 job->inPollfd = &fds[nfds]; 3266 nfds++; 3267 } 3268 3269 static void 3270 clearfd(job) 3271 Job *job; 3272 { 3273 int i; 3274 if (job->inPollfd == NULL) 3275 Punt("Unwatching unwatched job"); 3276 i = job->inPollfd - fds; 3277 nfds--; 3278 /* 3279 * Move last job in table into hole made by dead job. 3280 */ 3281 if (nfds != i) { 3282 fds[i] = fds[nfds]; 3283 jobfds[i] = jobfds[nfds]; 3284 jobfds[i]->inPollfd = &fds[i]; 3285 } 3286 job->inPollfd = NULL; 3287 } 3288 3289 static int 3290 readyfd(job) 3291 Job *job; 3292 { 3293 if (job->inPollfd == NULL) 3294 Punt("Polling unwatched job"); 3295 return (job->inPollfd->revents & POLLIN) != 0; 3296 } 3297 #endif 3298 #endif 3299 3300 /*- 3301 *----------------------------------------------------------------------- 3302 * JobTokenAdd -- 3303 * Put a token into the job pipe so that some make process can start 3304 * another job. 3305 * 3306 * Side Effects: 3307 * Allows more build jobs to be spawned somewhere. 3308 * 3309 *----------------------------------------------------------------------- 3310 */ 3311 3312 static void 3313 JobTokenAdd() 3314 { 3315 3316 if (DEBUG(JOB)) 3317 printf("deposit token\n"); 3318 write(job_pipe[1], "+", 1); 3319 } 3320 3321 /*- 3322 *----------------------------------------------------------------------- 3323 * Job_ServerStartTokenAdd -- 3324 * Prep the job token pipe in the root make process. 3325 * 3326 *----------------------------------------------------------------------- 3327 */ 3328 3329 void Job_ServerStart(maxproc) 3330 int maxproc; 3331 { 3332 int i, flags; 3333 char jobarg[64]; 3334 3335 if (pipe(job_pipe) < 0) 3336 Fatal ("error in pipe: %s", strerror(errno)); 3337 3338 /* 3339 * We mark the input side of the pipe non-blocking; we poll(2) the 3340 * pipe when we're waiting for a job token, but we might lose the 3341 * race for the token when a new one becomes available, so the read 3342 * from the pipe should not block. 3343 */ 3344 flags = fcntl(job_pipe[0], F_GETFL, 0); 3345 flags |= O_NONBLOCK; 3346 fcntl(job_pipe[0], F_SETFL, flags); 3347 3348 /* 3349 * Mark job pipes as close-on-exec. 3350 * Note that we will clear this when executing submakes. 3351 */ 3352 fcntl(job_pipe[0], F_SETFD, 1); 3353 fcntl(job_pipe[1], F_SETFD, 1); 3354 3355 snprintf(jobarg, sizeof(jobarg), "%d,%d", job_pipe[0], job_pipe[1]); 3356 3357 Var_Append(MAKEFLAGS, "-J", VAR_GLOBAL); 3358 Var_Append(MAKEFLAGS, jobarg, VAR_GLOBAL); 3359 3360 /* 3361 * Preload job_pipe with one token per job, save the one 3362 * "extra" token for the primary job. 3363 * 3364 * XXX should clip maxJobs against PIPE_BUF -- if maxJobs is 3365 * larger than the write buffer size of the pipe, we will 3366 * deadlock here. 3367 */ 3368 for (i=1; i < maxproc; i++) 3369 JobTokenAdd(); 3370 } 3371 3372 /* 3373 * this tracks the number of tokens currently "out" to build jobs. 3374 */ 3375 int jobTokensRunning = 0; 3376 int jobTokensFree = 0; 3377 /*- 3378 *----------------------------------------------------------------------- 3379 * Job_TokenReturn -- 3380 * Return a withdrawn token to the pool. 3381 * 3382 *----------------------------------------------------------------------- 3383 */ 3384 3385 void 3386 Job_TokenReturn() 3387 { 3388 jobTokensRunning--; 3389 if (jobTokensRunning < 0) 3390 Punt("token botch"); 3391 if (jobTokensRunning) 3392 jobTokensFree++; 3393 } 3394 3395 /*- 3396 *----------------------------------------------------------------------- 3397 * Job_TokenWithdraw -- 3398 * Attempt to withdraw a token from the pool. 3399 * 3400 * Results: 3401 * Returns TRUE if a token was withdrawn, and FALSE if the pool 3402 * is currently empty. 3403 * 3404 * Side Effects: 3405 * If pool is empty, set wantToken so that we wake up 3406 * when a token is released. 3407 * 3408 *----------------------------------------------------------------------- 3409 */ 3410 3411 3412 Boolean 3413 Job_TokenWithdraw() 3414 { 3415 char tok; 3416 int count; 3417 3418 if (aborting) 3419 return FALSE; 3420 3421 if (jobTokensRunning == 0) { 3422 if (DEBUG(JOB)) 3423 printf("first one's free\n"); 3424 jobTokensRunning++; 3425 wantToken = FALSE; 3426 return TRUE; 3427 } 3428 if (jobTokensFree > 0) { 3429 jobTokensFree--; 3430 jobTokensRunning++; 3431 wantToken = FALSE; 3432 return TRUE; 3433 } 3434 count = read(job_pipe[0], &tok, 1); 3435 if (count == 0) 3436 Fatal("eof on job pipe!"); 3437 else if (count < 0) { 3438 if (errno != EAGAIN) { 3439 Fatal("job pipe read: %s", strerror(errno)); 3440 } 3441 if (DEBUG(JOB)) 3442 printf("blocked for token\n"); 3443 wantToken = TRUE; 3444 return FALSE; 3445 } 3446 wantToken = FALSE; 3447 jobTokensRunning++; 3448 if (DEBUG(JOB)) 3449 printf("withdrew token\n"); 3450 return TRUE; 3451 } 3452 3453 /*- 3454 *----------------------------------------------------------------------- 3455 * Job_TokenFlush -- 3456 * Return free tokens to the pool. 3457 * 3458 *----------------------------------------------------------------------- 3459 */ 3460 3461 void 3462 Job_TokenFlush() 3463 { 3464 if (compatMake) return; 3465 3466 while (jobTokensFree > 0) { 3467 JobTokenAdd(); 3468 jobTokensFree--; 3469 } 3470 } 3471 3472
Indexes created Tue Sep 23 02:09:52 GMT 2025