job.c revision 1.48
1 /* $NetBSD: job.c,v 1.48 2001/05/29 17:37:52 christos 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 1.48 2001/05/29 17:37:52 christos 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 1.48 2001/05/29 17:37:52 christos 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 ((cp = Check_Cwd_Cmd(cmd)) != NULL) { 712 DBPRINTF("cd %s; ", cp); 713 } 714 DBPRINTF(cmdTemplate, cmd); 715 free(cmdStart); 716 717 if (errOff) { 718 /* 719 * If echoing is already off, there's no point in issuing the 720 * echoOff command. Otherwise we issue it and pretend it was on 721 * for the whole command... 722 */ 723 if (!shutUp && !(job->flags & JOB_SILENT) && commandShell->hasEchoCtl){ 724 DBPRINTF("%s\n", commandShell->echoOff); 725 shutUp = TRUE; 726 } 727 DBPRINTF("%s\n", commandShell->errCheck); 728 } 729 if (shutUp) { 730 DBPRINTF("%s\n", commandShell->echoOn); 731 } 732 return 0; 733 } 734 735 /*- 736 *----------------------------------------------------------------------- 737 * JobSaveCommand -- 738 * Save a command to be executed when everything else is done. 739 * Callback function for JobFinish... 740 * 741 * Results: 742 * Always returns 0 743 * 744 * Side Effects: 745 * The command is tacked onto the end of postCommands's commands list. 746 * 747 *----------------------------------------------------------------------- 748 */ 749 static int 750 JobSaveCommand(cmd, gn) 751 ClientData cmd; 752 ClientData gn; 753 { 754 cmd = (ClientData) Var_Subst(NULL, (char *) cmd, (GNode *) gn, FALSE); 755 (void) Lst_AtEnd(postCommands->commands, cmd); 756 return(0); 757 } 758 759 760 /*- 761 *----------------------------------------------------------------------- 762 * JobClose -- 763 * Called to close both input and output pipes when a job is finished. 764 * 765 * Results: 766 * Nada 767 * 768 * Side Effects: 769 * The file descriptors associated with the job are closed. 770 * 771 *----------------------------------------------------------------------- 772 */ 773 static void 774 JobClose(job) 775 Job *job; 776 { 777 if (usePipes && (job->flags & JOB_FIRST)) { 778 #ifdef RMT_WILL_WATCH 779 Rmt_Ignore(job->inPipe); 780 #else 781 #ifdef USE_SELECT 782 FD_CLR(job->inPipe, &outputs); 783 #else 784 clearfd(job); 785 #endif 786 #endif 787 if (job->outPipe != job->inPipe) { 788 (void) close(job->outPipe); 789 } 790 JobDoOutput(job, TRUE); 791 (void) close(job->inPipe); 792 } else { 793 (void) close(job->outFd); 794 JobDoOutput(job, TRUE); 795 } 796 } 797 798 /*- 799 *----------------------------------------------------------------------- 800 * JobFinish -- 801 * Do final processing for the given job including updating 802 * parents and starting new jobs as available/necessary. Note 803 * that we pay no attention to the JOB_IGNERR flag here. 804 * This is because when we're called because of a noexecute flag 805 * or something, jstat.w_status is 0 and when called from 806 * Job_CatchChildren, the status is zeroed if it s/b ignored. 807 * 808 * Results: 809 * None 810 * 811 * Side Effects: 812 * Some nodes may be put on the toBeMade queue. 813 * Final commands for the job are placed on postCommands. 814 * 815 * If we got an error and are aborting (aborting == ABORT_ERROR) and 816 * the job list is now empty, we are done for the day. 817 * If we recognized an error (errors !=0), we set the aborting flag 818 * to ABORT_ERROR so no more jobs will be started. 819 *----------------------------------------------------------------------- 820 */ 821 /*ARGSUSED*/ 822 static void 823 JobFinish(job, status) 824 Job *job; /* job to finish */ 825 int *status; /* sub-why job went away */ 826 { 827 Boolean done; 828 829 if ((WIFEXITED(*status) && 830 (((WEXITSTATUS(*status) != 0) && !(job->flags & JOB_IGNERR)))) || 831 WIFSIGNALED(*status)) 832 { 833 /* 834 * If it exited non-zero and either we're doing things our 835 * way or we're not ignoring errors, the job is finished. 836 * Similarly, if the shell died because of a signal 837 * the job is also finished. In these 838 * cases, finish out the job's output before printing the exit 839 * status... 840 */ 841 #ifdef REMOTE 842 KILL(job->pid, SIGCONT); 843 #endif 844 JobClose(job); 845 if (job->cmdFILE != NULL && job->cmdFILE != stdout) { 846 (void) fclose(job->cmdFILE); 847 job->cmdFILE = NULL; 848 } 849 done = TRUE; 850 #ifdef REMOTE 851 if (job->flags & JOB_REMOTE) 852 Rmt_Done(job->rmtID, job->node); 853 #endif 854 } else if (WIFEXITED(*status)) { 855 /* 856 * Deal with ignored errors in -B mode. We need to print a message 857 * telling of the ignored error as well as setting status.w_status 858 * to 0 so the next command gets run. To do this, we set done to be 859 * TRUE if in -B mode and the job exited non-zero. 860 */ 861 done = WEXITSTATUS(*status) != 0; 862 /* 863 * Old comment said: "Note we don't 864 * want to close down any of the streams until we know we're at the 865 * end." 866 * But we do. Otherwise when are we going to print the rest of the 867 * stuff? 868 */ 869 JobClose(job); 870 #ifdef REMOTE 871 if (job->flags & JOB_REMOTE) 872 Rmt_Done(job->rmtID, job->node); 873 #endif /* REMOTE */ 874 } else { 875 /* 876 * No need to close things down or anything. 877 */ 878 done = FALSE; 879 } 880 881 if (done || 882 WIFSTOPPED(*status) || 883 (WIFSIGNALED(*status) && (WTERMSIG(*status) == SIGCONT))) 884 { 885 FILE *out; 886 887 if (compatMake && !usePipes && (job->flags & JOB_IGNERR)) { 888 /* 889 * If output is going to a file and this job is ignoring 890 * errors, arrange to have the exit status sent to the 891 * output file as well. 892 */ 893 out = fdopen(job->outFd, "w"); 894 if (out == NULL) 895 Punt("Cannot fdopen"); 896 } else { 897 out = stdout; 898 } 899 900 if (WIFEXITED(*status)) { 901 if (DEBUG(JOB)) { 902 (void) fprintf(stdout, "Process %d exited.\n", job->pid); 903 (void) fflush(stdout); 904 } 905 if (WEXITSTATUS(*status) != 0) { 906 if (usePipes && job->node != lastNode) { 907 MESSAGE(out, job->node); 908 lastNode = job->node; 909 } 910 (void) fprintf(out, "*** Error code %d%s\n", 911 WEXITSTATUS(*status), 912 (job->flags & JOB_IGNERR) ? "(ignored)" : ""); 913 914 if (job->flags & JOB_IGNERR) { 915 *status = 0; 916 } 917 } else if (DEBUG(JOB)) { 918 if (usePipes && job->node != lastNode) { 919 MESSAGE(out, job->node); 920 lastNode = job->node; 921 } 922 (void) fprintf(out, "*** Completed successfully\n"); 923 } 924 } else if (WIFSTOPPED(*status) && WSTOPSIG(*status) != SIGCONT) { 925 if (DEBUG(JOB)) { 926 (void) fprintf(stdout, "Process %d stopped.\n", job->pid); 927 (void) fflush(stdout); 928 } 929 if (usePipes && job->node != lastNode) { 930 MESSAGE(out, job->node); 931 lastNode = job->node; 932 } 933 if (!(job->flags & JOB_REMIGRATE)) { 934 switch (WSTOPSIG(*status)) { 935 case SIGTSTP: 936 (void) fprintf(out, "*** Suspended\n"); 937 break; 938 case SIGSTOP: 939 (void) fprintf(out, "*** Stopped\n"); 940 break; 941 default: 942 (void) fprintf(out, "*** Stopped -- signal %d\n", 943 WSTOPSIG(*status)); 944 } 945 } 946 job->flags |= JOB_RESUME; 947 (void)Lst_AtEnd(stoppedJobs, (ClientData)job); 948 #ifdef REMOTE 949 if (job->flags & JOB_REMIGRATE) 950 JobRestart(job); 951 #endif 952 (void) fflush(out); 953 return; 954 } else if (WIFSTOPPED(*status) && WSTOPSIG(*status) == SIGCONT) { 955 /* 956 * If the beastie has continued, shift the Job from the stopped 957 * list to the running one (or re-stop it if concurrency is 958 * exceeded) and go and get another child. 959 */ 960 if (job->flags & (JOB_RESUME|JOB_REMIGRATE|JOB_RESTART)) { 961 if (usePipes && job->node != lastNode) { 962 MESSAGE(out, job->node); 963 lastNode = job->node; 964 } 965 (void) fprintf(out, "*** Continued\n"); 966 } 967 if (!(job->flags & JOB_CONTINUING)) { 968 if (DEBUG(JOB)) { 969 (void) fprintf(stdout, 970 "Warning: process %d was not continuing.\n", 971 job->pid); 972 (void) fflush(stdout); 973 } 974 #ifdef notdef 975 /* 976 * We don't really want to restart a job from scratch just 977 * because it continued, especially not without killing the 978 * continuing process! That's why this is ifdef'ed out. 979 * FD - 9/17/90 980 */ 981 JobRestart(job); 982 #endif 983 } 984 job->flags &= ~JOB_CONTINUING; 985 Lst_AtEnd(jobs, (ClientData)job); 986 nJobs += 1; 987 if (!(job->flags & JOB_REMOTE)) { 988 if (DEBUG(JOB)) { 989 (void) fprintf(stdout, 990 "Process %d is continuing locally.\n", 991 job->pid); 992 (void) fflush(stdout); 993 } 994 nLocal += 1; 995 } 996 (void) fflush(out); 997 return; 998 } else { 999 if (usePipes && job->node != lastNode) { 1000 MESSAGE(out, job->node); 1001 lastNode = job->node; 1002 } 1003 (void) fprintf(out, "*** Signal %d\n", WTERMSIG(*status)); 1004 } 1005 1006 (void) fflush(out); 1007 } 1008 1009 /* 1010 * Now handle the -B-mode stuff. If the beast still isn't finished, 1011 * try and restart the job on the next command. If JobStart says it's 1012 * ok, it's ok. If there's an error, this puppy is done. 1013 */ 1014 if (compatMake && (WIFEXITED(*status) && 1015 !Lst_IsAtEnd(job->node->commands))) { 1016 switch (JobStart(job->node, job->flags & JOB_IGNDOTS, job)) { 1017 case JOB_RUNNING: 1018 done = FALSE; 1019 break; 1020 case JOB_ERROR: 1021 done = TRUE; 1022 *status = W_EXITCODE(1, 0); 1023 break; 1024 case JOB_FINISHED: 1025 /* 1026 * If we got back a JOB_FINISHED code, JobStart has already 1027 * called Make_Update and freed the job descriptor. We set 1028 * done to false here to avoid fake cycles and double frees. 1029 * JobStart needs to do the update so we can proceed up the 1030 * graph when given the -n flag.. 1031 */ 1032 done = FALSE; 1033 break; 1034 } 1035 } else { 1036 done = TRUE; 1037 } 1038 1039 if (done) { 1040 Trace_Log(JOBEND, job); 1041 if (!compatMake && !(job->flags & JOB_SPECIAL)) { 1042 if ((*status != 0) || 1043 (aborting == ABORT_ERROR) || 1044 (aborting == ABORT_INTERRUPT)) 1045 Job_TokenReturn(); 1046 } 1047 1048 } 1049 1050 if (done && 1051 (aborting != ABORT_ERROR) && 1052 (aborting != ABORT_INTERRUPT) && 1053 (*status == 0)) 1054 { 1055 /* 1056 * As long as we aren't aborting and the job didn't return a non-zero 1057 * status that we shouldn't ignore, we call Make_Update to update 1058 * the parents. In addition, any saved commands for the node are placed 1059 * on the .END target. 1060 */ 1061 if (job->tailCmds != NILLNODE) { 1062 Lst_ForEachFrom(job->node->commands, job->tailCmds, 1063 JobSaveCommand, 1064 (ClientData)job->node); 1065 } 1066 job->node->made = MADE; 1067 if (!(job->flags & JOB_SPECIAL)) 1068 Job_TokenReturn(); 1069 Make_Update(job->node); 1070 free((Address)job); 1071 } else if (*status != 0) { 1072 errors += 1; 1073 free((Address)job); 1074 } 1075 JobRestartJobs(); 1076 1077 /* 1078 * Set aborting if any error. 1079 */ 1080 if (errors && !keepgoing && (aborting != ABORT_INTERRUPT)) { 1081 /* 1082 * If we found any errors in this batch of children and the -k flag 1083 * wasn't given, we set the aborting flag so no more jobs get 1084 * started. 1085 */ 1086 aborting = ABORT_ERROR; 1087 } 1088 1089 if ((aborting == ABORT_ERROR) && Job_Empty()) { 1090 /* 1091 * If we are aborting and the job table is now empty, we finish. 1092 */ 1093 Finish(errors); 1094 } 1095 } 1096 1097 /*- 1098 *----------------------------------------------------------------------- 1099 * Job_Touch -- 1100 * Touch the given target. Called by JobStart when the -t flag was 1101 * given 1102 * 1103 * Results: 1104 * None 1105 * 1106 * Side Effects: 1107 * The data modification of the file is changed. In addition, if the 1108 * file did not exist, it is created. 1109 *----------------------------------------------------------------------- 1110 */ 1111 void 1112 Job_Touch(gn, silent) 1113 GNode *gn; /* the node of the file to touch */ 1114 Boolean silent; /* TRUE if should not print messages */ 1115 { 1116 int streamID; /* ID of stream opened to do the touch */ 1117 struct utimbuf times; /* Times for utime() call */ 1118 1119 if (gn->type & (OP_JOIN|OP_USE|OP_EXEC|OP_OPTIONAL|OP_PHONY)) { 1120 /* 1121 * .JOIN, .USE, .ZEROTIME and .OPTIONAL targets are "virtual" targets 1122 * and, as such, shouldn't really be created. 1123 */ 1124 return; 1125 } 1126 1127 if (!silent || NoExecute(gn)) { 1128 (void) fprintf(stdout, "touch %s\n", gn->name); 1129 (void) fflush(stdout); 1130 } 1131 1132 if (NoExecute(gn)) { 1133 return; 1134 } 1135 1136 if (gn->type & OP_ARCHV) { 1137 Arch_Touch(gn); 1138 } else if (gn->type & OP_LIB) { 1139 Arch_TouchLib(gn); 1140 } else { 1141 char *file = gn->path ? gn->path : gn->name; 1142 1143 times.actime = times.modtime = now; 1144 if (utime(file, ×) < 0){ 1145 streamID = open(file, O_RDWR | O_CREAT, 0666); 1146 1147 if (streamID >= 0) { 1148 char c; 1149 1150 /* 1151 * Read and write a byte to the file to change the 1152 * modification time, then close the file. 1153 */ 1154 if (read(streamID, &c, 1) == 1) { 1155 (void) lseek(streamID, (off_t)0, SEEK_SET); 1156 (void) write(streamID, &c, 1); 1157 } 1158 1159 (void) close(streamID); 1160 } else { 1161 (void) fprintf(stdout, "*** couldn't touch %s: %s", 1162 file, strerror(errno)); 1163 (void) fflush(stdout); 1164 } 1165 } 1166 } 1167 } 1168 1169 /*- 1170 *----------------------------------------------------------------------- 1171 * Job_CheckCommands -- 1172 * Make sure the given node has all the commands it needs. 1173 * 1174 * Results: 1175 * TRUE if the commands list is/was ok. 1176 * 1177 * Side Effects: 1178 * The node will have commands from the .DEFAULT rule added to it 1179 * if it needs them. 1180 *----------------------------------------------------------------------- 1181 */ 1182 Boolean 1183 Job_CheckCommands(gn, abortProc) 1184 GNode *gn; /* The target whose commands need 1185 * verifying */ 1186 void (*abortProc) __P((char *, ...)); 1187 /* Function to abort with message */ 1188 { 1189 if (OP_NOP(gn->type) && Lst_IsEmpty(gn->commands) && 1190 (gn->type & OP_LIB) == 0) { 1191 /* 1192 * No commands. Look for .DEFAULT rule from which we might infer 1193 * commands 1194 */ 1195 if ((DEFAULT != NILGNODE) && !Lst_IsEmpty(DEFAULT->commands)) { 1196 char *p1; 1197 /* 1198 * Make only looks for a .DEFAULT if the node was never the 1199 * target of an operator, so that's what we do too. If 1200 * a .DEFAULT was given, we substitute its commands for gn's 1201 * commands and set the IMPSRC variable to be the target's name 1202 * The DEFAULT node acts like a transformation rule, in that 1203 * gn also inherits any attributes or sources attached to 1204 * .DEFAULT itself. 1205 */ 1206 Make_HandleUse(DEFAULT, gn); 1207 Var_Set(IMPSRC, Var_Value(TARGET, gn, &p1), gn); 1208 if (p1) 1209 free(p1); 1210 } else if (Dir_MTime(gn) == 0) { 1211 /* 1212 * The node wasn't the target of an operator we have no .DEFAULT 1213 * rule to go on and the target doesn't already exist. There's 1214 * nothing more we can do for this branch. If the -k flag wasn't 1215 * given, we stop in our tracks, otherwise we just don't update 1216 * this node's parents so they never get examined. 1217 */ 1218 static const char msg[] = ": don't know how to make"; 1219 1220 if (gn->type & OP_OPTIONAL) { 1221 (void) fprintf(stdout, "%s%s %s(ignored)\n", progname, 1222 msg, gn->name); 1223 (void) fflush(stdout); 1224 } else if (keepgoing) { 1225 (void) fprintf(stdout, "%s%s %s(continuing)\n", progname, 1226 msg, gn->name); 1227 (void) fflush(stdout); 1228 return FALSE; 1229 } else { 1230 (*abortProc)("%s%s %s. Stop", progname, msg, gn->name); 1231 return FALSE; 1232 } 1233 } 1234 } 1235 return TRUE; 1236 } 1237 #ifdef RMT_WILL_WATCH 1238 /*- 1239 *----------------------------------------------------------------------- 1240 * JobLocalInput -- 1241 * Handle a pipe becoming readable. Callback function for Rmt_Watch 1242 * 1243 * Results: 1244 * None 1245 * 1246 * Side Effects: 1247 * JobDoOutput is called. 1248 * 1249 *----------------------------------------------------------------------- 1250 */ 1251 /*ARGSUSED*/ 1252 static void 1253 JobLocalInput(stream, job) 1254 int stream; /* Stream that's ready (ignored) */ 1255 Job *job; /* Job to which the stream belongs */ 1256 { 1257 JobDoOutput(job, FALSE); 1258 } 1259 #endif /* RMT_WILL_WATCH */ 1260 1261 /*- 1262 *----------------------------------------------------------------------- 1263 * JobExec -- 1264 * Execute the shell for the given job. Called from JobStart and 1265 * JobRestart. 1266 * 1267 * Results: 1268 * None. 1269 * 1270 * Side Effects: 1271 * A shell is executed, outputs is altered and the Job structure added 1272 * to the job table. 1273 * 1274 *----------------------------------------------------------------------- 1275 */ 1276 static void 1277 JobExec(job, argv) 1278 Job *job; /* Job to execute */ 1279 char **argv; 1280 { 1281 int cpid; /* ID of new child */ 1282 1283 if (DEBUG(JOB)) { 1284 int i; 1285 1286 (void) fprintf(stdout, "Running %s %sly\n", job->node->name, 1287 job->flags&JOB_REMOTE?"remote":"local"); 1288 (void) fprintf(stdout, "\tCommand: "); 1289 for (i = 0; argv[i] != NULL; i++) { 1290 (void) fprintf(stdout, "%s ", argv[i]); 1291 } 1292 (void) fprintf(stdout, "\n"); 1293 (void) fflush(stdout); 1294 } 1295 1296 /* 1297 * Some jobs produce no output and it's disconcerting to have 1298 * no feedback of their running (since they produce no output, the 1299 * banner with their name in it never appears). This is an attempt to 1300 * provide that feedback, even if nothing follows it. 1301 */ 1302 if ((lastNode != job->node) && (job->flags & JOB_FIRST) && 1303 !(job->flags & JOB_SILENT)) { 1304 MESSAGE(stdout, job->node); 1305 lastNode = job->node; 1306 } 1307 1308 #ifdef RMT_NO_EXEC 1309 if (job->flags & JOB_REMOTE) { 1310 goto jobExecFinish; 1311 } 1312 #endif /* RMT_NO_EXEC */ 1313 1314 if ((cpid = vfork()) == -1) { 1315 Punt("Cannot vfork"); 1316 } else if (cpid == 0) { 1317 1318 /* 1319 * Must duplicate the input stream down to the child's input and 1320 * reset it to the beginning (again). Since the stream was marked 1321 * close-on-exec, we must clear that bit in the new input. 1322 */ 1323 if (dup2(FILENO(job->cmdFILE), 0) == -1) 1324 Punt("Cannot dup2: %s", strerror(errno)); 1325 (void) fcntl(0, F_SETFD, 0); 1326 (void) lseek(0, (off_t)0, SEEK_SET); 1327 1328 if (job->node->type & OP_MAKE) { 1329 /* 1330 * Pass job token pipe to submakes. 1331 */ 1332 fcntl(job_pipe[0], F_SETFD, 0); 1333 fcntl(job_pipe[1], F_SETFD, 0); 1334 } 1335 1336 if (usePipes) { 1337 /* 1338 * Set up the child's output to be routed through the pipe 1339 * we've created for it. 1340 */ 1341 if (dup2(job->outPipe, 1) == -1) 1342 Punt("Cannot dup2: %s", strerror(errno)); 1343 } else { 1344 /* 1345 * We're capturing output in a file, so we duplicate the 1346 * descriptor to the temporary file into the standard 1347 * output. 1348 */ 1349 if (dup2(job->outFd, 1) == -1) 1350 Punt("Cannot dup2: %s", strerror(errno)); 1351 } 1352 /* 1353 * The output channels are marked close on exec. This bit was 1354 * duplicated by the dup2 (on some systems), so we have to clear 1355 * it before routing the shell's error output to the same place as 1356 * its standard output. 1357 */ 1358 (void) fcntl(1, F_SETFD, 0); 1359 if (dup2(1, 2) == -1) 1360 Punt("Cannot dup2: %s", strerror(errno)); 1361 1362 #ifdef USE_PGRP 1363 /* 1364 * We want to switch the child into a different process family so 1365 * we can kill it and all its descendants in one fell swoop, 1366 * by killing its process family, but not commit suicide. 1367 */ 1368 # if defined(SYSV) 1369 (void) setsid(); 1370 # else 1371 (void) setpgid(0, getpid()); 1372 # endif 1373 #endif /* USE_PGRP */ 1374 1375 #ifdef REMOTE 1376 if (job->flags & JOB_REMOTE) { 1377 Rmt_Exec(shellPath, argv, FALSE); 1378 } else 1379 #endif /* REMOTE */ 1380 { 1381 (void) execv(shellPath, argv); 1382 execError(shellPath); 1383 } 1384 _exit(1); 1385 } else { 1386 #ifdef REMOTE 1387 sigset_t nmask, omask; 1388 sigemptyset(&nmask); 1389 sigaddset(&nmask, SIGCHLD); 1390 sigprocmask(SIG_BLOCK, &nmask, &omask); 1391 #endif 1392 job->pid = cpid; 1393 1394 Trace_Log(JOBSTART, job); 1395 1396 if (usePipes && (job->flags & JOB_FIRST)) { 1397 /* 1398 * The first time a job is run for a node, we set the current 1399 * position in the buffer to the beginning and mark another 1400 * stream to watch in the outputs mask 1401 */ 1402 job->curPos = 0; 1403 1404 #ifdef RMT_WILL_WATCH 1405 Rmt_Watch(job->inPipe, JobLocalInput, job); 1406 #else 1407 #ifdef USE_SELECT 1408 FD_SET(job->inPipe, &outputs); 1409 #else 1410 watchfd(job); 1411 #endif 1412 #endif /* RMT_WILL_WATCH */ 1413 } 1414 1415 if (job->flags & JOB_REMOTE) { 1416 #ifndef REMOTE 1417 job->rmtID = 0; 1418 #else 1419 job->rmtID = Rmt_LastID(job->pid); 1420 #endif /* REMOTE */ 1421 } else { 1422 nLocal += 1; 1423 /* 1424 * XXX: Used to not happen if REMOTE. Why? 1425 */ 1426 if (job->cmdFILE != NULL && job->cmdFILE != stdout) { 1427 (void) fclose(job->cmdFILE); 1428 job->cmdFILE = NULL; 1429 } 1430 } 1431 #ifdef REMOTE 1432 sigprocmask(SIG_SETMASK, &omask, NULL); 1433 #endif 1434 } 1435 1436 #ifdef RMT_NO_EXEC 1437 jobExecFinish: 1438 #endif 1439 /* 1440 * Now the job is actually running, add it to the table. 1441 */ 1442 nJobs += 1; 1443 (void) Lst_AtEnd(jobs, (ClientData)job); 1444 } 1445 1446 /*- 1447 *----------------------------------------------------------------------- 1448 * JobMakeArgv -- 1449 * Create the argv needed to execute the shell for a given job. 1450 * 1451 * 1452 * Results: 1453 * 1454 * Side Effects: 1455 * 1456 *----------------------------------------------------------------------- 1457 */ 1458 static void 1459 JobMakeArgv(job, argv) 1460 Job *job; 1461 char **argv; 1462 { 1463 int argc; 1464 static char args[10]; /* For merged arguments */ 1465 1466 argv[0] = shellName; 1467 argc = 1; 1468 1469 if ((commandShell->exit && (*commandShell->exit != '-')) || 1470 (commandShell->echo && (*commandShell->echo != '-'))) 1471 { 1472 /* 1473 * At least one of the flags doesn't have a minus before it, so 1474 * merge them together. Have to do this because the *(&(@*#*&#$# 1475 * Bourne shell thinks its second argument is a file to source. 1476 * Grrrr. Note the ten-character limitation on the combined arguments. 1477 */ 1478 (void)snprintf(args, sizeof(args), "-%s%s", 1479 ((job->flags & JOB_IGNERR) ? "" : 1480 (commandShell->exit ? commandShell->exit : "")), 1481 ((job->flags & JOB_SILENT) ? "" : 1482 (commandShell->echo ? commandShell->echo : ""))); 1483 1484 if (args[1]) { 1485 argv[argc] = args; 1486 argc++; 1487 } 1488 } else { 1489 if (!(job->flags & JOB_IGNERR) && commandShell->exit) { 1490 argv[argc] = commandShell->exit; 1491 argc++; 1492 } 1493 if (!(job->flags & JOB_SILENT) && commandShell->echo) { 1494 argv[argc] = commandShell->echo; 1495 argc++; 1496 } 1497 } 1498 argv[argc] = NULL; 1499 } 1500 1501 /*- 1502 *----------------------------------------------------------------------- 1503 * JobRestart -- 1504 * Restart a job that stopped for some reason. 1505 * 1506 * Results: 1507 * None. 1508 * 1509 *----------------------------------------------------------------------- 1510 */ 1511 static void 1512 JobRestart(job) 1513 Job *job; /* Job to restart */ 1514 { 1515 #ifdef REMOTE 1516 int host; 1517 #endif 1518 1519 if (job->flags & JOB_REMIGRATE) { 1520 if ( 1521 #ifdef REMOTE 1522 verboseRemigrates || 1523 #endif 1524 DEBUG(JOB)) { 1525 (void) fprintf(stdout, "*** remigrating %x(%s)\n", 1526 job->pid, job->node->name); 1527 (void) fflush(stdout); 1528 } 1529 1530 #ifdef REMOTE 1531 if (!Rmt_ReExport(job->pid, job->node, &host)) { 1532 if (verboseRemigrates || DEBUG(JOB)) { 1533 (void) fprintf(stdout, "*** couldn't migrate...\n"); 1534 (void) fflush(stdout); 1535 } 1536 #endif 1537 if (nLocal != maxLocal) { 1538 /* 1539 * Job cannot be remigrated, but there's room on the local 1540 * machine, so resume the job and note that another 1541 * local job has started. 1542 */ 1543 if ( 1544 #ifdef REMOTE 1545 verboseRemigrates || 1546 #endif 1547 DEBUG(JOB)) { 1548 (void) fprintf(stdout, "*** resuming on local machine\n"); 1549 (void) fflush(stdout); 1550 } 1551 KILL(job->pid, SIGCONT); 1552 nLocal +=1; 1553 #ifdef REMOTE 1554 job->flags &= ~(JOB_REMIGRATE|JOB_RESUME|JOB_REMOTE); 1555 job->flags |= JOB_CONTINUING; 1556 #else 1557 job->flags &= ~(JOB_REMIGRATE|JOB_RESUME); 1558 #endif 1559 } else { 1560 /* 1561 * Job cannot be restarted. Mark the table as full and 1562 * place the job back on the list of stopped jobs. 1563 */ 1564 if ( 1565 #ifdef REMOTE 1566 verboseRemigrates || 1567 #endif 1568 DEBUG(JOB)) { 1569 (void) fprintf(stdout, "*** holding\n"); 1570 (void) fflush(stdout); 1571 } 1572 (void)Lst_AtFront(stoppedJobs, (ClientData)job); 1573 return; 1574 } 1575 #ifdef REMOTE 1576 } else { 1577 /* 1578 * Clear out the remigrate and resume flags. Set the continuing 1579 * flag so we know later on that the process isn't exiting just 1580 * because of a signal. 1581 */ 1582 job->flags &= ~(JOB_REMIGRATE|JOB_RESUME); 1583 job->flags |= JOB_CONTINUING; 1584 job->rmtID = host; 1585 } 1586 #endif 1587 1588 (void)Lst_AtEnd(jobs, (ClientData)job); 1589 nJobs += 1; 1590 } else if (job->flags & JOB_RESTART) { 1591 /* 1592 * Set up the control arguments to the shell. This is based on the 1593 * flags set earlier for this job. If the JOB_IGNERR flag is clear, 1594 * the 'exit' flag of the commandShell is used to cause it to exit 1595 * upon receiving an error. If the JOB_SILENT flag is clear, the 1596 * 'echo' flag of the commandShell is used to get it to start echoing 1597 * as soon as it starts processing commands. 1598 */ 1599 char *argv[10]; 1600 1601 JobMakeArgv(job, argv); 1602 1603 if (DEBUG(JOB)) { 1604 (void) fprintf(stdout, "Restarting %s...", job->node->name); 1605 (void) fflush(stdout); 1606 } 1607 #ifdef REMOTE 1608 if ((job->node->type&OP_NOEXPORT) || 1609 (nLocal < maxLocal && runLocalFirst) 1610 # ifdef RMT_NO_EXEC 1611 || !Rmt_Export(shellPath, argv, job) 1612 # else 1613 || !Rmt_Begin(shellPath, argv, job->node) 1614 # endif 1615 #endif 1616 { 1617 if (((nLocal >= maxLocal) && !(job->flags & JOB_SPECIAL))) { 1618 /* 1619 * Can't be exported and not allowed to run locally -- put it 1620 * back on the hold queue and mark the table full 1621 */ 1622 if (DEBUG(JOB)) { 1623 (void) fprintf(stdout, "holding\n"); 1624 (void) fflush(stdout); 1625 } 1626 (void)Lst_AtFront(stoppedJobs, (ClientData)job); 1627 return; 1628 } else { 1629 /* 1630 * Job may be run locally. 1631 */ 1632 if (DEBUG(JOB)) { 1633 (void) fprintf(stdout, "running locally\n"); 1634 (void) fflush(stdout); 1635 } 1636 job->flags &= ~JOB_REMOTE; 1637 } 1638 } 1639 #ifdef REMOTE 1640 else { 1641 /* 1642 * Can be exported. Hooray! 1643 */ 1644 if (DEBUG(JOB)) { 1645 (void) fprintf(stdout, "exporting\n"); 1646 (void) fflush(stdout); 1647 } 1648 job->flags |= JOB_REMOTE; 1649 } 1650 #endif 1651 JobExec(job, argv); 1652 } else { 1653 /* 1654 * The job has stopped and needs to be restarted. Why it stopped, 1655 * we don't know... 1656 */ 1657 if (DEBUG(JOB)) { 1658 (void) fprintf(stdout, "Resuming %s...", job->node->name); 1659 (void) fflush(stdout); 1660 } 1661 if (((job->flags & JOB_REMOTE) || 1662 (nLocal < maxLocal) || 1663 #ifdef REMOTE 1664 (((job->flags & JOB_SPECIAL) && 1665 (job->node->type & OP_NOEXPORT)) && 1666 (maxLocal == 0))) && 1667 #else 1668 ((job->flags & JOB_SPECIAL) && 1669 (maxLocal == 0))) && 1670 #endif 1671 (nJobs != maxJobs)) 1672 { 1673 /* 1674 * If the job is remote, it's ok to resume it as long as the 1675 * maximum concurrency won't be exceeded. If it's local and 1676 * we haven't reached the local concurrency limit already (or the 1677 * job must be run locally and maxLocal is 0), it's also ok to 1678 * resume it. 1679 */ 1680 Boolean error; 1681 int status; 1682 1683 #ifdef RMT_WANTS_SIGNALS 1684 if (job->flags & JOB_REMOTE) { 1685 error = !Rmt_Signal(job, SIGCONT); 1686 } else 1687 #endif /* RMT_WANTS_SIGNALS */ 1688 error = (KILL(job->pid, SIGCONT) != 0); 1689 1690 if (!error) { 1691 /* 1692 * Make sure the user knows we've continued the beast and 1693 * actually put the thing in the job table. 1694 */ 1695 job->flags |= JOB_CONTINUING; 1696 status = W_STOPCODE(SIGCONT); 1697 JobFinish(job, &status); 1698 1699 job->flags &= ~(JOB_RESUME|JOB_CONTINUING); 1700 if (DEBUG(JOB)) { 1701 (void) fprintf(stdout, "done\n"); 1702 (void) fflush(stdout); 1703 } 1704 } else { 1705 Error("couldn't resume %s: %s", 1706 job->node->name, strerror(errno)); 1707 status = W_EXITCODE(1, 0); 1708 JobFinish(job, &status); 1709 } 1710 } else { 1711 /* 1712 * Job cannot be restarted. Mark the table as full and 1713 * place the job back on the list of stopped jobs. 1714 */ 1715 if (DEBUG(JOB)) { 1716 (void) fprintf(stdout, "table full\n"); 1717 (void) fflush(stdout); 1718 } 1719 (void) Lst_AtFront(stoppedJobs, (ClientData)job); 1720 } 1721 } 1722 } 1723 1724 /*- 1725 *----------------------------------------------------------------------- 1726 * JobStart -- 1727 * Start a target-creation process going for the target described 1728 * by the graph node gn. 1729 * 1730 * Results: 1731 * JOB_ERROR if there was an error in the commands, JOB_FINISHED 1732 * if there isn't actually anything left to do for the job and 1733 * JOB_RUNNING if the job has been started. 1734 * 1735 * Side Effects: 1736 * A new Job node is created and added to the list of running 1737 * jobs. PMake is forked and a child shell created. 1738 *----------------------------------------------------------------------- 1739 */ 1740 static int 1741 JobStart(gn, flags, previous) 1742 GNode *gn; /* target to create */ 1743 int flags; /* flags for the job to override normal ones. 1744 * e.g. JOB_SPECIAL or JOB_IGNDOTS */ 1745 Job *previous; /* The previous Job structure for this node, 1746 * if any. */ 1747 { 1748 register Job *job; /* new job descriptor */ 1749 char *argv[10]; /* Argument vector to shell */ 1750 Boolean cmdsOK; /* true if the nodes commands were all right */ 1751 Boolean local; /* Set true if the job was run locally */ 1752 Boolean noExec; /* Set true if we decide not to run the job */ 1753 int tfd; /* File descriptor to the temp file */ 1754 1755 if (previous != NULL) { 1756 previous->flags &= ~(JOB_FIRST|JOB_IGNERR|JOB_SILENT|JOB_REMOTE); 1757 job = previous; 1758 } else { 1759 job = (Job *) emalloc(sizeof(Job)); 1760 if (job == NULL) { 1761 Punt("JobStart out of memory"); 1762 } 1763 flags |= JOB_FIRST; 1764 } 1765 1766 job->node = gn; 1767 job->tailCmds = NILLNODE; 1768 1769 /* 1770 * Set the initial value of the flags for this job based on the global 1771 * ones and the node's attributes... Any flags supplied by the caller 1772 * are also added to the field. 1773 */ 1774 job->flags = 0; 1775 if (Targ_Ignore(gn)) { 1776 job->flags |= JOB_IGNERR; 1777 } 1778 if (Targ_Silent(gn)) { 1779 job->flags |= JOB_SILENT; 1780 } 1781 job->flags |= flags; 1782 1783 /* 1784 * Check the commands now so any attributes from .DEFAULT have a chance 1785 * to migrate to the node 1786 */ 1787 if (!compatMake && job->flags & JOB_FIRST) { 1788 cmdsOK = Job_CheckCommands(gn, Error); 1789 } else { 1790 cmdsOK = TRUE; 1791 } 1792 1793 #ifndef RMT_WILL_WATCH 1794 #ifndef USE_SELECT 1795 job->inPollfd = NULL; 1796 #endif 1797 #endif 1798 /* 1799 * If the -n flag wasn't given, we open up OUR (not the child's) 1800 * temporary file to stuff commands in it. The thing is rd/wr so we don't 1801 * need to reopen it to feed it to the shell. If the -n flag *was* given, 1802 * we just set the file to be stdout. Cute, huh? 1803 */ 1804 if (((gn->type & OP_MAKE) && !(noRecursiveExecute)) || 1805 (!noExecute && !touchFlag)) { 1806 /* 1807 * tfile is the name of a file into which all shell commands are 1808 * put. It is used over by removing it before the child shell is 1809 * executed. The XXXXXX in the string are replaced by the pid of 1810 * the make process in a 6-character field with leading zeroes. 1811 */ 1812 char tfile[sizeof(TMPPAT)]; 1813 /* 1814 * We're serious here, but if the commands were bogus, we're 1815 * also dead... 1816 */ 1817 if (!cmdsOK) { 1818 DieHorribly(); 1819 } 1820 1821 (void)strcpy(tfile, TMPPAT); 1822 if ((tfd = mkstemp(tfile)) == -1) 1823 Punt("Could not create temporary file %s", strerror(errno)); 1824 (void) eunlink(tfile); 1825 1826 job->cmdFILE = fdopen(tfd, "w+"); 1827 if (job->cmdFILE == NULL) { 1828 Punt("Could not fdopen %s", tfile); 1829 } 1830 (void) fcntl(FILENO(job->cmdFILE), F_SETFD, 1); 1831 /* 1832 * Send the commands to the command file, flush all its buffers then 1833 * rewind and remove the thing. 1834 */ 1835 noExec = FALSE; 1836 1837 /* 1838 * used to be backwards; replace when start doing multiple commands 1839 * per shell. 1840 */ 1841 if (compatMake) { 1842 /* 1843 * Be compatible: If this is the first time for this node, 1844 * verify its commands are ok and open the commands list for 1845 * sequential access by later invocations of JobStart. 1846 * Once that is done, we take the next command off the list 1847 * and print it to the command file. If the command was an 1848 * ellipsis, note that there's nothing more to execute. 1849 */ 1850 if ((job->flags&JOB_FIRST) && (Lst_Open(gn->commands) != SUCCESS)){ 1851 cmdsOK = FALSE; 1852 } else { 1853 LstNode ln = Lst_Next(gn->commands); 1854 1855 if ((ln == NILLNODE) || 1856 JobPrintCommand((ClientData) Lst_Datum(ln), 1857 (ClientData) job)) 1858 { 1859 noExec = TRUE; 1860 Lst_Close(gn->commands); 1861 } 1862 if (noExec && !(job->flags & JOB_FIRST)) { 1863 /* 1864 * If we're not going to execute anything, the job 1865 * is done and we need to close down the various 1866 * file descriptors we've opened for output, then 1867 * call JobDoOutput to catch the final characters or 1868 * send the file to the screen... Note that the i/o streams 1869 * are only open if this isn't the first job. 1870 * Note also that this could not be done in 1871 * Job_CatchChildren b/c it wasn't clear if there were 1872 * more commands to execute or not... 1873 */ 1874 JobClose(job); 1875 } 1876 } 1877 } else { 1878 /* 1879 * We can do all the commands at once. hooray for sanity 1880 */ 1881 numCommands = 0; 1882 Lst_ForEach(gn->commands, JobPrintCommand, (ClientData)job); 1883 1884 /* 1885 * If we didn't print out any commands to the shell script, 1886 * there's not much point in executing the shell, is there? 1887 */ 1888 if (numCommands == 0) { 1889 noExec = TRUE; 1890 } 1891 } 1892 } else if (NoExecute(gn)) { 1893 /* 1894 * Not executing anything -- just print all the commands to stdout 1895 * in one fell swoop. This will still set up job->tailCmds correctly. 1896 */ 1897 if (lastNode != gn) { 1898 MESSAGE(stdout, gn); 1899 lastNode = gn; 1900 } 1901 job->cmdFILE = stdout; 1902 /* 1903 * Only print the commands if they're ok, but don't die if they're 1904 * not -- just let the user know they're bad and keep going. It 1905 * doesn't do any harm in this case and may do some good. 1906 */ 1907 if (cmdsOK) { 1908 Lst_ForEach(gn->commands, JobPrintCommand, (ClientData)job); 1909 } 1910 /* 1911 * Don't execute the shell, thank you. 1912 */ 1913 noExec = TRUE; 1914 } else { 1915 /* 1916 * Just touch the target and note that no shell should be executed. 1917 * Set cmdFILE to stdout to make life easier. Check the commands, too, 1918 * but don't die if they're no good -- it does no harm to keep working 1919 * up the graph. 1920 */ 1921 job->cmdFILE = stdout; 1922 Job_Touch(gn, job->flags&JOB_SILENT); 1923 noExec = TRUE; 1924 } 1925 1926 /* 1927 * If we're not supposed to execute a shell, don't. 1928 */ 1929 if (noExec) { 1930 /* 1931 * Unlink and close the command file if we opened one 1932 */ 1933 if (job->cmdFILE != stdout) { 1934 if (job->cmdFILE != NULL) { 1935 (void) fclose(job->cmdFILE); 1936 job->cmdFILE = NULL; 1937 } 1938 } else { 1939 (void) fflush(stdout); 1940 } 1941 1942 /* 1943 * We only want to work our way up the graph if we aren't here because 1944 * the commands for the job were no good. 1945 */ 1946 if (cmdsOK) { 1947 if (aborting == 0) { 1948 if (job->tailCmds != NILLNODE) { 1949 Lst_ForEachFrom(job->node->commands, job->tailCmds, 1950 JobSaveCommand, 1951 (ClientData)job->node); 1952 } 1953 if (!(job->flags & JOB_SPECIAL)) 1954 Job_TokenReturn(); 1955 Make_Update(job->node); 1956 } 1957 free((Address)job); 1958 return(JOB_FINISHED); 1959 } else { 1960 free((Address)job); 1961 return(JOB_ERROR); 1962 } 1963 } else { 1964 (void) fflush(job->cmdFILE); 1965 } 1966 1967 /* 1968 * Set up the control arguments to the shell. This is based on the flags 1969 * set earlier for this job. 1970 */ 1971 JobMakeArgv(job, argv); 1972 1973 /* 1974 * If we're using pipes to catch output, create the pipe by which we'll 1975 * get the shell's output. If we're using files, print out that we're 1976 * starting a job and then set up its temporary-file name. 1977 */ 1978 if (!compatMake || (job->flags & JOB_FIRST)) { 1979 if (usePipes) { 1980 int fd[2]; 1981 if (pipe(fd) == -1) 1982 Punt("Cannot create pipe: %s", strerror(errno)); 1983 job->inPipe = fd[0]; 1984 #ifdef USE_SELECT 1985 if (job->inPipe >= FD_SETSIZE) 1986 Punt("Ran out of fd_set slots; " 1987 "recompile with a larger FD_SETSIZE."); 1988 #endif 1989 job->outPipe = fd[1]; 1990 (void) fcntl(job->inPipe, F_SETFD, 1); 1991 (void) fcntl(job->outPipe, F_SETFD, 1); 1992 } else { 1993 (void) fprintf(stdout, "Remaking `%s'\n", gn->name); 1994 (void) fflush(stdout); 1995 (void) strcpy(job->outFile, TMPPAT); 1996 job->outFd = mkstemp(job->outFile); 1997 (void) fcntl(job->outFd, F_SETFD, 1); 1998 } 1999 } 2000 2001 #ifdef REMOTE 2002 if (!(gn->type & OP_NOEXPORT) && !(runLocalFirst && nLocal < maxLocal)) { 2003 #ifdef RMT_NO_EXEC 2004 local = !Rmt_Export(shellPath, argv, job); 2005 #else 2006 local = !Rmt_Begin(shellPath, argv, job->node); 2007 #endif /* RMT_NO_EXEC */ 2008 if (!local) { 2009 job->flags |= JOB_REMOTE; 2010 } 2011 } else 2012 #endif 2013 local = TRUE; 2014 2015 if (local && (((nLocal >= maxLocal) && 2016 !(job->flags & JOB_SPECIAL) && 2017 #ifdef REMOTE 2018 (!(gn->type & OP_NOEXPORT) || (maxLocal != 0)) 2019 #else 2020 (maxLocal != 0) 2021 #endif 2022 ))) 2023 { 2024 /* 2025 * The job can only be run locally, but we've hit the limit of 2026 * local concurrency, so put the job on hold until some other job 2027 * finishes. Note that the special jobs (.BEGIN, .INTERRUPT and .END) 2028 * may be run locally even when the local limit has been reached 2029 * (e.g. when maxLocal == 0), though they will be exported if at 2030 * all possible. In addition, any target marked with .NOEXPORT will 2031 * be run locally if maxLocal is 0. 2032 */ 2033 job->flags |= JOB_RESTART; 2034 (void) Lst_AtEnd(stoppedJobs, (ClientData)job); 2035 } else { 2036 JobExec(job, argv); 2037 } 2038 return(JOB_RUNNING); 2039 } 2040 2041 static char * 2042 JobOutput(job, cp, endp, msg) 2043 register Job *job; 2044 register char *cp, *endp; 2045 int msg; 2046 { 2047 register char *ecp; 2048 2049 if (commandShell->noPrint) { 2050 ecp = Str_FindSubstring(cp, commandShell->noPrint); 2051 while (ecp != NULL) { 2052 if (cp != ecp) { 2053 *ecp = '\0'; 2054 if (msg && job->node != lastNode) { 2055 MESSAGE(stdout, job->node); 2056 lastNode = job->node; 2057 } 2058 /* 2059 * The only way there wouldn't be a newline after 2060 * this line is if it were the last in the buffer. 2061 * however, since the non-printable comes after it, 2062 * there must be a newline, so we don't print one. 2063 */ 2064 (void) fprintf(stdout, "%s", cp); 2065 (void) fflush(stdout); 2066 } 2067 cp = ecp + commandShell->noPLen; 2068 if (cp != endp) { 2069 /* 2070 * Still more to print, look again after skipping 2071 * the whitespace following the non-printable 2072 * command.... 2073 */ 2074 cp++; 2075 while (*cp == ' ' || *cp == '\t' || *cp == '\n') { 2076 cp++; 2077 } 2078 ecp = Str_FindSubstring(cp, commandShell->noPrint); 2079 } else { 2080 return cp; 2081 } 2082 } 2083 } 2084 return cp; 2085 } 2086 2087 /*- 2088 *----------------------------------------------------------------------- 2089 * JobDoOutput -- 2090 * This function is called at different times depending on 2091 * whether the user has specified that output is to be collected 2092 * via pipes or temporary files. In the former case, we are called 2093 * whenever there is something to read on the pipe. We collect more 2094 * output from the given job and store it in the job's outBuf. If 2095 * this makes up a line, we print it tagged by the job's identifier, 2096 * as necessary. 2097 * If output has been collected in a temporary file, we open the 2098 * file and read it line by line, transfering it to our own 2099 * output channel until the file is empty. At which point we 2100 * remove the temporary file. 2101 * In both cases, however, we keep our figurative eye out for the 2102 * 'noPrint' line for the shell from which the output came. If 2103 * we recognize a line, we don't print it. If the command is not 2104 * alone on the line (the character after it is not \0 or \n), we 2105 * do print whatever follows it. 2106 * 2107 * Results: 2108 * None 2109 * 2110 * Side Effects: 2111 * curPos may be shifted as may the contents of outBuf. 2112 *----------------------------------------------------------------------- 2113 */ 2114 STATIC void 2115 JobDoOutput(job, finish) 2116 register Job *job; /* the job whose output needs printing */ 2117 Boolean finish; /* TRUE if this is the last time we'll be 2118 * called for this job */ 2119 { 2120 Boolean gotNL = FALSE; /* true if got a newline */ 2121 Boolean fbuf; /* true if our buffer filled up */ 2122 register int nr; /* number of bytes read */ 2123 register int i; /* auxiliary index into outBuf */ 2124 register int max; /* limit for i (end of current data) */ 2125 int nRead; /* (Temporary) number of bytes read */ 2126 2127 FILE *oFILE; /* Stream pointer to shell's output file */ 2128 char inLine[132]; 2129 2130 2131 if (usePipes) { 2132 /* 2133 * Read as many bytes as will fit in the buffer. 2134 */ 2135 end_loop: 2136 gotNL = FALSE; 2137 fbuf = FALSE; 2138 2139 nRead = read(job->inPipe, &job->outBuf[job->curPos], 2140 JOB_BUFSIZE - job->curPos); 2141 if (nRead < 0) { 2142 if (DEBUG(JOB)) { 2143 perror("JobDoOutput(piperead)"); 2144 } 2145 nr = 0; 2146 } else { 2147 nr = nRead; 2148 } 2149 2150 /* 2151 * If we hit the end-of-file (the job is dead), we must flush its 2152 * remaining output, so pretend we read a newline if there's any 2153 * output remaining in the buffer. 2154 * Also clear the 'finish' flag so we stop looping. 2155 */ 2156 if ((nr == 0) && (job->curPos != 0)) { 2157 job->outBuf[job->curPos] = '\n'; 2158 nr = 1; 2159 finish = FALSE; 2160 } else if (nr == 0) { 2161 finish = FALSE; 2162 } 2163 2164 /* 2165 * Look for the last newline in the bytes we just got. If there is 2166 * one, break out of the loop with 'i' as its index and gotNL set 2167 * TRUE. 2168 */ 2169 max = job->curPos + nr; 2170 for (i = job->curPos + nr - 1; i >= job->curPos; i--) { 2171 if (job->outBuf[i] == '\n') { 2172 gotNL = TRUE; 2173 break; 2174 } else if (job->outBuf[i] == '\0') { 2175 /* 2176 * Why? 2177 */ 2178 job->outBuf[i] = ' '; 2179 } 2180 } 2181 2182 if (!gotNL) { 2183 job->curPos += nr; 2184 if (job->curPos == JOB_BUFSIZE) { 2185 /* 2186 * If we've run out of buffer space, we have no choice 2187 * but to print the stuff. sigh. 2188 */ 2189 fbuf = TRUE; 2190 i = job->curPos; 2191 } 2192 } 2193 if (gotNL || fbuf) { 2194 /* 2195 * Need to send the output to the screen. Null terminate it 2196 * first, overwriting the newline character if there was one. 2197 * So long as the line isn't one we should filter (according 2198 * to the shell description), we print the line, preceeded 2199 * by a target banner if this target isn't the same as the 2200 * one for which we last printed something. 2201 * The rest of the data in the buffer are then shifted down 2202 * to the start of the buffer and curPos is set accordingly. 2203 */ 2204 job->outBuf[i] = '\0'; 2205 if (i >= job->curPos) { 2206 char *cp; 2207 2208 cp = JobOutput(job, job->outBuf, &job->outBuf[i], FALSE); 2209 2210 /* 2211 * There's still more in that thar buffer. This time, though, 2212 * we know there's no newline at the end, so we add one of 2213 * our own free will. 2214 */ 2215 if (*cp != '\0') { 2216 if (job->node != lastNode) { 2217 MESSAGE(stdout, job->node); 2218 lastNode = job->node; 2219 } 2220 (void) fprintf(stdout, "%s%s", cp, gotNL ? "\n" : ""); 2221 (void) fflush(stdout); 2222 } 2223 } 2224 if (i < max - 1) { 2225 /* shift the remaining characters down */ 2226 (void) memcpy(job->outBuf, &job->outBuf[i + 1], max - (i + 1)); 2227 job->curPos = max - (i + 1); 2228 2229 } else { 2230 /* 2231 * We have written everything out, so we just start over 2232 * from the start of the buffer. No copying. No nothing. 2233 */ 2234 job->curPos = 0; 2235 } 2236 } 2237 if (finish) { 2238 /* 2239 * If the finish flag is true, we must loop until we hit 2240 * end-of-file on the pipe. This is guaranteed to happen 2241 * eventually since the other end of the pipe is now closed 2242 * (we closed it explicitly and the child has exited). When 2243 * we do get an EOF, finish will be set FALSE and we'll fall 2244 * through and out. 2245 */ 2246 goto end_loop; 2247 } 2248 } else { 2249 /* 2250 * We've been called to retrieve the output of the job from the 2251 * temporary file where it's been squirreled away. This consists of 2252 * opening the file, reading the output line by line, being sure not 2253 * to print the noPrint line for the shell we used, then close and 2254 * remove the temporary file. Very simple. 2255 * 2256 * Change to read in blocks and do FindSubString type things as for 2257 * pipes? That would allow for "@echo -n..." 2258 */ 2259 oFILE = fopen(job->outFile, "r"); 2260 if (oFILE != NULL) { 2261 (void) fprintf(stdout, "Results of making %s:\n", job->node->name); 2262 (void) fflush(stdout); 2263 while (fgets(inLine, sizeof(inLine), oFILE) != NULL) { 2264 register char *cp, *endp, *oendp; 2265 2266 cp = inLine; 2267 oendp = endp = inLine + strlen(inLine); 2268 if (endp[-1] == '\n') { 2269 *--endp = '\0'; 2270 } 2271 cp = JobOutput(job, inLine, endp, FALSE); 2272 2273 /* 2274 * There's still more in that thar buffer. This time, though, 2275 * we know there's no newline at the end, so we add one of 2276 * our own free will. 2277 */ 2278 (void) fprintf(stdout, "%s", cp); 2279 (void) fflush(stdout); 2280 if (endp != oendp) { 2281 (void) fprintf(stdout, "\n"); 2282 (void) fflush(stdout); 2283 } 2284 } 2285 (void) fclose(oFILE); 2286 (void) eunlink(job->outFile); 2287 } else { 2288 Punt("Cannot open `%s'", job->outFile); 2289 } 2290 } 2291 } 2292 2293 /*- 2294 *----------------------------------------------------------------------- 2295 * Job_CatchChildren -- 2296 * Handle the exit of a child. Called from Make_Make. 2297 * 2298 * Results: 2299 * none. 2300 * 2301 * Side Effects: 2302 * The job descriptor is removed from the list of children. 2303 * 2304 * Notes: 2305 * We do waits, blocking or not, according to the wisdom of our 2306 * caller, until there are no more children to report. For each 2307 * job, call JobFinish to finish things off. This will take care of 2308 * putting jobs on the stoppedJobs queue. 2309 * 2310 *----------------------------------------------------------------------- 2311 */ 2312 void 2313 Job_CatchChildren(block) 2314 Boolean block; /* TRUE if should block on the wait. */ 2315 { 2316 int pid; /* pid of dead child */ 2317 register Job *job; /* job descriptor for dead child */ 2318 LstNode jnode; /* list element for finding job */ 2319 int status; /* Exit/termination status */ 2320 2321 /* 2322 * Don't even bother if we know there's no one around. 2323 */ 2324 if (nLocal == 0) { 2325 return; 2326 } 2327 2328 while ((pid = waitpid((pid_t) -1, &status, 2329 (block?0:WNOHANG)|WUNTRACED)) > 0) 2330 { 2331 if (DEBUG(JOB)) { 2332 (void) fprintf(stdout, "Process %d exited or stopped %x.\n", pid, 2333 status); 2334 (void) fflush(stdout); 2335 } 2336 2337 2338 jnode = Lst_Find(jobs, (ClientData)&pid, JobCmpPid); 2339 2340 if (jnode == NILLNODE) { 2341 if (WIFSTOPPED(status) && (WSTOPSIG(status) == SIGCONT)) { 2342 jnode = Lst_Find(stoppedJobs, (ClientData) &pid, JobCmpPid); 2343 if (jnode == NILLNODE) { 2344 Error("Resumed child (%d) not in table", pid); 2345 continue; 2346 } 2347 job = (Job *)Lst_Datum(jnode); 2348 (void) Lst_Remove(stoppedJobs, jnode); 2349 } else { 2350 Error("Child (%d) not in table?", pid); 2351 continue; 2352 } 2353 } else { 2354 job = (Job *) Lst_Datum(jnode); 2355 (void) Lst_Remove(jobs, jnode); 2356 nJobs -= 1; 2357 #ifdef REMOTE 2358 if (!(job->flags & JOB_REMOTE)) { 2359 if (DEBUG(JOB)) { 2360 (void) fprintf(stdout, 2361 "Job queue has one fewer local process.\n"); 2362 (void) fflush(stdout); 2363 } 2364 nLocal -= 1; 2365 } 2366 #else 2367 nLocal -= 1; 2368 #endif 2369 } 2370 2371 JobFinish(job, &status); 2372 } 2373 } 2374 2375 /*- 2376 *----------------------------------------------------------------------- 2377 * Job_CatchOutput -- 2378 * Catch the output from our children, if we're using 2379 * pipes do so. Otherwise just block time until we get a 2380 * signal (most likely a SIGCHLD) since there's no point in 2381 * just spinning when there's nothing to do and the reaping 2382 * of a child can wait for a while. 2383 * 2384 * Results: 2385 * None 2386 * 2387 * Side Effects: 2388 * Output is read from pipes if we're piping. 2389 * ----------------------------------------------------------------------- 2390 */ 2391 void 2392 Job_CatchOutput() 2393 { 2394 int nready; 2395 register LstNode ln; 2396 register Job *job; 2397 #ifdef RMT_WILL_WATCH 2398 int pnJobs; /* Previous nJobs */ 2399 #endif 2400 2401 (void) fflush(stdout); 2402 Job_TokenFlush(); 2403 #ifdef RMT_WILL_WATCH 2404 pnJobs = nJobs; 2405 2406 /* 2407 * It is possible for us to be called with nJobs equal to 0. This happens 2408 * if all the jobs finish and a job that is stopped cannot be run 2409 * locally (eg if maxLocal is 0) and cannot be exported. The job will 2410 * be placed back on the stoppedJobs queue, Job_Empty() will return false, 2411 * Make_Run will call us again when there's nothing for which to wait. 2412 * nJobs never changes, so we loop forever. Hence the check. It could 2413 * be argued that we should sleep for a bit so as not to swamp the 2414 * exportation system with requests. Perhaps we should. 2415 * 2416 * NOTE: IT IS THE RESPONSIBILITY OF Rmt_Wait TO CALL Job_CatchChildren 2417 * IN A TIMELY FASHION TO CATCH ANY LOCALLY RUNNING JOBS THAT EXIT. 2418 * It may use the variable nLocal to determine if it needs to call 2419 * Job_CatchChildren (if nLocal is 0, there's nothing for which to 2420 * wait...) 2421 */ 2422 while (nJobs != 0 && pnJobs == nJobs) { 2423 Rmt_Wait(); 2424 } 2425 #else 2426 if (usePipes) { 2427 #ifdef USE_SELECT 2428 struct timeval timeout; 2429 fd_set readfds; 2430 2431 readfds = outputs; 2432 timeout.tv_sec = SEL_SEC; 2433 timeout.tv_usec = SEL_USEC; 2434 2435 if ((nready = select(FD_SETSIZE, &readfds, (fd_set *) 0, 2436 (fd_set *) 0, &timeout)) <= 0) 2437 return; 2438 #else 2439 if ((nready = poll((wantToken ? fds : (fds + 1)), 2440 (wantToken ? nfds : (nfds - 1)), POLL_MSEC)) <= 0) 2441 return; 2442 #endif 2443 else { 2444 if (Lst_Open(jobs) == FAILURE) { 2445 Punt("Cannot open job table"); 2446 } 2447 while (nready && (ln = Lst_Next(jobs)) != NILLNODE) { 2448 job = (Job *) Lst_Datum(ln); 2449 #ifdef USE_SELECT 2450 if (FD_ISSET(job->inPipe, &readfds)) 2451 #else 2452 if (readyfd(job)) 2453 #endif 2454 { 2455 JobDoOutput(job, FALSE); 2456 nready -= 1; 2457 } 2458 2459 } 2460 Lst_Close(jobs); 2461 } 2462 } 2463 #endif /* RMT_WILL_WATCH */ 2464 } 2465 2466 /*- 2467 *----------------------------------------------------------------------- 2468 * Job_Make -- 2469 * Start the creation of a target. Basically a front-end for 2470 * JobStart used by the Make module. 2471 * 2472 * Results: 2473 * None. 2474 * 2475 * Side Effects: 2476 * Another job is started. 2477 * 2478 *----------------------------------------------------------------------- 2479 */ 2480 void 2481 Job_Make(gn) 2482 GNode *gn; 2483 { 2484 (void) JobStart(gn, 0, NULL); 2485 } 2486 2487 /*- 2488 *----------------------------------------------------------------------- 2489 * Job_Init -- 2490 * Initialize the process module 2491 * 2492 * Results: 2493 * none 2494 * 2495 * Side Effects: 2496 * lists and counters are initialized 2497 *----------------------------------------------------------------------- 2498 */ 2499 void 2500 Job_Init(maxproc, maxlocal) 2501 int maxproc; /* the greatest number of jobs which may be 2502 * running at one time */ 2503 int maxlocal; /* the greatest number of local jobs which may 2504 * be running at once. */ 2505 { 2506 GNode *begin; /* node for commands to do at the very start */ 2507 2508 jobs = Lst_Init(FALSE); 2509 stoppedJobs = Lst_Init(FALSE); 2510 maxJobs = maxproc; 2511 maxLocal = maxlocal; 2512 nJobs = 0; 2513 nLocal = 0; 2514 wantToken = FALSE; 2515 2516 aborting = 0; 2517 errors = 0; 2518 2519 lastNode = NILGNODE; 2520 2521 if (maxJobs == 1 2522 #ifdef REMOTE 2523 || noMessages 2524 #endif 2525 ) { 2526 /* 2527 * If only one job can run at a time, there's no need for a banner, 2528 * is there? 2529 */ 2530 targFmt = ""; 2531 } else { 2532 targFmt = TARG_FMT; 2533 } 2534 2535 if (shellPath == NULL) { 2536 /* 2537 * The user didn't specify a shell to use, so we are using the 2538 * default one... Both the absolute path and the last component 2539 * must be set. The last component is taken from the 'name' field 2540 * of the default shell description pointed-to by commandShell. 2541 * All default shells are located in _PATH_DEFSHELLDIR. 2542 */ 2543 shellName = commandShell->name; 2544 shellPath = str_concat(_PATH_DEFSHELLDIR, shellName, STR_ADDSLASH); 2545 } 2546 2547 if (commandShell->exit == NULL) { 2548 commandShell->exit = ""; 2549 } 2550 if (commandShell->echo == NULL) { 2551 commandShell->echo = ""; 2552 } 2553 2554 /* 2555 * Catch the four signals that POSIX specifies if they aren't ignored. 2556 * JobPassSig will take care of calling JobInterrupt if appropriate. 2557 */ 2558 if (signal(SIGINT, SIG_IGN) != SIG_IGN) { 2559 (void) signal(SIGINT, JobPassSig); 2560 } 2561 if (signal(SIGHUP, SIG_IGN) != SIG_IGN) { 2562 (void) signal(SIGHUP, JobPassSig); 2563 } 2564 if (signal(SIGQUIT, SIG_IGN) != SIG_IGN) { 2565 (void) signal(SIGQUIT, JobPassSig); 2566 } 2567 if (signal(SIGTERM, SIG_IGN) != SIG_IGN) { 2568 (void) signal(SIGTERM, JobPassSig); 2569 } 2570 /* 2571 * Install a NOOP SIGCHLD handler so we are woken up if we're blocked. 2572 */ 2573 signal(SIGCHLD, JobIgnoreSig); 2574 2575 /* 2576 * There are additional signals that need to be caught and passed if 2577 * either the export system wants to be told directly of signals or if 2578 * we're giving each job its own process group (since then it won't get 2579 * signals from the terminal driver as we own the terminal) 2580 */ 2581 #if defined(RMT_WANTS_SIGNALS) || defined(USE_PGRP) 2582 if (signal(SIGTSTP, SIG_IGN) != SIG_IGN) { 2583 (void) signal(SIGTSTP, JobPassSig); 2584 } 2585 if (signal(SIGTTOU, SIG_IGN) != SIG_IGN) { 2586 (void) signal(SIGTTOU, JobPassSig); 2587 } 2588 if (signal(SIGTTIN, SIG_IGN) != SIG_IGN) { 2589 (void) signal(SIGTTIN, JobPassSig); 2590 } 2591 if (signal(SIGWINCH, SIG_IGN) != SIG_IGN) { 2592 (void) signal(SIGWINCH, JobPassSig); 2593 } 2594 if (signal(SIGCONT, SIG_IGN) != SIG_IGN) { 2595 (void) signal(SIGCONT, JobContinueSig); 2596 } 2597 #endif 2598 2599 begin = Targ_FindNode(".BEGIN", TARG_NOCREATE); 2600 2601 if (begin != NILGNODE) { 2602 JobStart(begin, JOB_SPECIAL, (Job *)0); 2603 while (nJobs) { 2604 Job_CatchOutput(); 2605 #ifndef RMT_WILL_WATCH 2606 Job_CatchChildren(!usePipes); 2607 #endif /* RMT_WILL_WATCH */ 2608 } 2609 } 2610 postCommands = Targ_FindNode(".END", TARG_CREATE); 2611 } 2612 2613 /*- 2614 *----------------------------------------------------------------------- 2615 * Job_Empty -- 2616 * See if the job table is empty. Because the local concurrency may 2617 * be set to 0, it is possible for the job table to become empty, 2618 * while the list of stoppedJobs remains non-empty. In such a case, 2619 * we want to restart as many jobs as we can. 2620 * 2621 * Results: 2622 * TRUE if it is. FALSE if it ain't. 2623 * 2624 * Side Effects: 2625 * None. 2626 * 2627 * ----------------------------------------------------------------------- 2628 */ 2629 Boolean 2630 Job_Empty() 2631 { 2632 if (nJobs == 0) { 2633 if (!Lst_IsEmpty(stoppedJobs) && !aborting) { 2634 /* 2635 * The job table is obviously not full if it has no jobs in 2636 * it...Try and restart the stopped jobs. 2637 */ 2638 JobRestartJobs(); 2639 return(FALSE); 2640 } else { 2641 return(TRUE); 2642 } 2643 } else { 2644 return(FALSE); 2645 } 2646 } 2647 2648 /*- 2649 *----------------------------------------------------------------------- 2650 * JobMatchShell -- 2651 * Find a matching shell in 'shells' given its final component. 2652 * 2653 * Results: 2654 * A pointer to the Shell structure. 2655 * 2656 * Side Effects: 2657 * None. 2658 * 2659 *----------------------------------------------------------------------- 2660 */ 2661 static Shell * 2662 JobMatchShell(name) 2663 char *name; /* Final component of shell path */ 2664 { 2665 register Shell *sh; /* Pointer into shells table */ 2666 Shell *match; /* Longest-matching shell */ 2667 register char *cp1, 2668 *cp2; 2669 char *eoname; 2670 2671 eoname = name + strlen(name); 2672 2673 match = NULL; 2674 2675 for (sh = shells; sh->name != NULL; sh++) { 2676 for (cp1 = eoname - strlen(sh->name), cp2 = sh->name; 2677 *cp1 != '\0' && *cp1 == *cp2; 2678 cp1++, cp2++) { 2679 continue; 2680 } 2681 if (*cp1 != *cp2) { 2682 continue; 2683 } else if (match == NULL || strlen(match->name) < strlen(sh->name)) { 2684 match = sh; 2685 } 2686 } 2687 return(match == NULL ? sh : match); 2688 } 2689 2690 /*- 2691 *----------------------------------------------------------------------- 2692 * Job_ParseShell -- 2693 * Parse a shell specification and set up commandShell, shellPath 2694 * and shellName appropriately. 2695 * 2696 * Results: 2697 * FAILURE if the specification was incorrect. 2698 * 2699 * Side Effects: 2700 * commandShell points to a Shell structure (either predefined or 2701 * created from the shell spec), shellPath is the full path of the 2702 * shell described by commandShell, while shellName is just the 2703 * final component of shellPath. 2704 * 2705 * Notes: 2706 * A shell specification consists of a .SHELL target, with dependency 2707 * operator, followed by a series of blank-separated words. Double 2708 * quotes can be used to use blanks in words. A backslash escapes 2709 * anything (most notably a double-quote and a space) and 2710 * provides the functionality it does in C. Each word consists of 2711 * keyword and value separated by an equal sign. There should be no 2712 * unnecessary spaces in the word. The keywords are as follows: 2713 * name Name of shell. 2714 * path Location of shell. Overrides "name" if given 2715 * quiet Command to turn off echoing. 2716 * echo Command to turn echoing on 2717 * filter Result of turning off echoing that shouldn't be 2718 * printed. 2719 * echoFlag Flag to turn echoing on at the start 2720 * errFlag Flag to turn error checking on at the start 2721 * hasErrCtl True if shell has error checking control 2722 * check Command to turn on error checking if hasErrCtl 2723 * is TRUE or template of command to echo a command 2724 * for which error checking is off if hasErrCtl is 2725 * FALSE. 2726 * ignore Command to turn off error checking if hasErrCtl 2727 * is TRUE or template of command to execute a 2728 * command so as to ignore any errors it returns if 2729 * hasErrCtl is FALSE. 2730 * 2731 *----------------------------------------------------------------------- 2732 */ 2733 ReturnStatus 2734 Job_ParseShell(line) 2735 char *line; /* The shell spec */ 2736 { 2737 char **words; 2738 int wordCount; 2739 register char **argv; 2740 register int argc; 2741 char *path; 2742 Shell newShell; 2743 Boolean fullSpec = FALSE; 2744 2745 while (isspace((unsigned char)*line)) { 2746 line++; 2747 } 2748 2749 if (shellArgv) 2750 free(shellArgv); 2751 2752 words = brk_string(line, &wordCount, TRUE, &shellArgv); 2753 2754 memset((Address)&newShell, 0, sizeof(newShell)); 2755 2756 /* 2757 * Parse the specification by keyword 2758 */ 2759 for (path = NULL, argc = wordCount - 1, argv = words; 2760 argc != 0; 2761 argc--, argv++) { 2762 if (strncmp(*argv, "path=", 5) == 0) { 2763 path = &argv[0][5]; 2764 } else if (strncmp(*argv, "name=", 5) == 0) { 2765 newShell.name = &argv[0][5]; 2766 } else { 2767 if (strncmp(*argv, "quiet=", 6) == 0) { 2768 newShell.echoOff = &argv[0][6]; 2769 } else if (strncmp(*argv, "echo=", 5) == 0) { 2770 newShell.echoOn = &argv[0][5]; 2771 } else if (strncmp(*argv, "filter=", 7) == 0) { 2772 newShell.noPrint = &argv[0][7]; 2773 newShell.noPLen = strlen(newShell.noPrint); 2774 } else if (strncmp(*argv, "echoFlag=", 9) == 0) { 2775 newShell.echo = &argv[0][9]; 2776 } else if (strncmp(*argv, "errFlag=", 8) == 0) { 2777 newShell.exit = &argv[0][8]; 2778 } else if (strncmp(*argv, "hasErrCtl=", 10) == 0) { 2779 char c = argv[0][10]; 2780 newShell.hasErrCtl = !((c != 'Y') && (c != 'y') && 2781 (c != 'T') && (c != 't')); 2782 } else if (strncmp(*argv, "check=", 6) == 0) { 2783 newShell.errCheck = &argv[0][6]; 2784 } else if (strncmp(*argv, "ignore=", 7) == 0) { 2785 newShell.ignErr = &argv[0][7]; 2786 } else { 2787 Parse_Error(PARSE_FATAL, "Unknown keyword \"%s\"", 2788 *argv); 2789 free(words); 2790 return(FAILURE); 2791 } 2792 fullSpec = TRUE; 2793 } 2794 } 2795 2796 if (path == NULL) { 2797 /* 2798 * If no path was given, the user wants one of the pre-defined shells, 2799 * yes? So we find the one s/he wants with the help of JobMatchShell 2800 * and set things up the right way. shellPath will be set up by 2801 * Job_Init. 2802 */ 2803 if (newShell.name == NULL) { 2804 Parse_Error(PARSE_FATAL, "Neither path nor name specified"); 2805 return(FAILURE); 2806 } else { 2807 commandShell = JobMatchShell(newShell.name); 2808 shellName = newShell.name; 2809 } 2810 } else { 2811 /* 2812 * The user provided a path. If s/he gave nothing else (fullSpec is 2813 * FALSE), try and find a matching shell in the ones we know of. 2814 * Else we just take the specification at its word and copy it 2815 * to a new location. In either case, we need to record the 2816 * path the user gave for the shell. 2817 */ 2818 shellPath = path; 2819 path = strrchr(path, '/'); 2820 if (path == NULL) { 2821 path = shellPath; 2822 } else { 2823 path += 1; 2824 } 2825 if (newShell.name != NULL) { 2826 shellName = newShell.name; 2827 } else { 2828 shellName = path; 2829 } 2830 if (!fullSpec) { 2831 commandShell = JobMatchShell(shellName); 2832 } else { 2833 commandShell = (Shell *) emalloc(sizeof(Shell)); 2834 *commandShell = newShell; 2835 } 2836 } 2837 2838 if (commandShell->echoOn && commandShell->echoOff) { 2839 commandShell->hasEchoCtl = TRUE; 2840 } 2841 2842 if (!commandShell->hasErrCtl) { 2843 if (commandShell->errCheck == NULL) { 2844 commandShell->errCheck = ""; 2845 } 2846 if (commandShell->ignErr == NULL) { 2847 commandShell->ignErr = "%s\n"; 2848 } 2849 } 2850 2851 /* 2852 * Do not free up the words themselves, since they might be in use by the 2853 * shell specification. 2854 */ 2855 free(words); 2856 return SUCCESS; 2857 } 2858 2859 /*- 2860 *----------------------------------------------------------------------- 2861 * JobInterrupt -- 2862 * Handle the receipt of an interrupt. 2863 * 2864 * Results: 2865 * None 2866 * 2867 * Side Effects: 2868 * All children are killed. Another job will be started if the 2869 * .INTERRUPT target was given. 2870 *----------------------------------------------------------------------- 2871 */ 2872 static void 2873 JobInterrupt(runINTERRUPT, signo) 2874 int runINTERRUPT; /* Non-zero if commands for the .INTERRUPT 2875 * target should be executed */ 2876 int signo; /* signal received */ 2877 { 2878 LstNode ln; /* element in job table */ 2879 Job *job; /* job descriptor in that element */ 2880 GNode *interrupt; /* the node describing the .INTERRUPT target */ 2881 2882 aborting = ABORT_INTERRUPT; 2883 2884 (void) Lst_Open(jobs); 2885 while ((ln = Lst_Next(jobs)) != NILLNODE) { 2886 job = (Job *) Lst_Datum(ln); 2887 2888 if (!Targ_Precious(job->node)) { 2889 char *file = (job->node->path == NULL ? 2890 job->node->name : 2891 job->node->path); 2892 if (!noExecute && eunlink(file) != -1) { 2893 Error("*** %s removed", file); 2894 } 2895 } 2896 #ifdef RMT_WANTS_SIGNALS 2897 if (job->flags & JOB_REMOTE) { 2898 /* 2899 * If job is remote, let the Rmt module do the killing. 2900 */ 2901 if (!Rmt_Signal(job, signo)) { 2902 /* 2903 * If couldn't kill the thing, finish it out now with an 2904 * error code, since no exit report will come in likely. 2905 */ 2906 int status; 2907 2908 status.w_status = 0; 2909 status.w_retcode = 1; 2910 JobFinish(job, &status); 2911 } 2912 } else if (job->pid) { 2913 KILL(job->pid, signo); 2914 } 2915 #else 2916 if (job->pid) { 2917 if (DEBUG(JOB)) { 2918 (void) fprintf(stdout, 2919 "JobInterrupt passing signal to child %d.\n", 2920 job->pid); 2921 (void) fflush(stdout); 2922 } 2923 KILL(job->pid, signo); 2924 } 2925 #endif /* RMT_WANTS_SIGNALS */ 2926 } 2927 2928 #ifdef REMOTE 2929 (void)Lst_Open(stoppedJobs); 2930 while ((ln = Lst_Next(stoppedJobs)) != NILLNODE) { 2931 job = (Job *) Lst_Datum(ln); 2932 2933 if (job->flags & JOB_RESTART) { 2934 if (DEBUG(JOB)) { 2935 (void) fprintf(stdout, "%s%s", 2936 "JobInterrupt skipping job on stopped queue", 2937 "-- it was waiting to be restarted.\n"); 2938 (void) fflush(stdout); 2939 } 2940 continue; 2941 } 2942 if (!Targ_Precious(job->node)) { 2943 char *file = (job->node->path == NULL ? 2944 job->node->name : 2945 job->node->path); 2946 if (eunlink(file) == 0) { 2947 Error("*** %s removed", file); 2948 } 2949 } 2950 /* 2951 * Resume the thing so it will take the signal. 2952 */ 2953 if (DEBUG(JOB)) { 2954 (void) fprintf(stdout, 2955 "JobInterrupt passing CONT to stopped child %d.\n", 2956 job->pid); 2957 (void) fflush(stdout); 2958 } 2959 KILL(job->pid, SIGCONT); 2960 #ifdef RMT_WANTS_SIGNALS 2961 if (job->flags & JOB_REMOTE) { 2962 /* 2963 * If job is remote, let the Rmt module do the killing. 2964 */ 2965 if (!Rmt_Signal(job, SIGINT)) { 2966 /* 2967 * If couldn't kill the thing, finish it out now with an 2968 * error code, since no exit report will come in likely. 2969 */ 2970 int status; 2971 status.w_status = 0; 2972 status.w_retcode = 1; 2973 JobFinish(job, &status); 2974 } 2975 } else if (job->pid) { 2976 if (DEBUG(JOB)) { 2977 (void) fprintf(stdout, 2978 "JobInterrupt passing interrupt to stopped child %d.\n", 2979 job->pid); 2980 (void) fflush(stdout); 2981 } 2982 KILL(job->pid, SIGINT); 2983 } 2984 #endif /* RMT_WANTS_SIGNALS */ 2985 } 2986 #endif 2987 Lst_Close(stoppedJobs); 2988 2989 if (runINTERRUPT && !touchFlag) { 2990 interrupt = Targ_FindNode(".INTERRUPT", TARG_NOCREATE); 2991 if (interrupt != NILGNODE) { 2992 ignoreErrors = FALSE; 2993 2994 JobStart(interrupt, JOB_IGNDOTS, (Job *)0); 2995 while (nJobs) { 2996 Job_CatchOutput(); 2997 #ifndef RMT_WILL_WATCH 2998 Job_CatchChildren(!usePipes); 2999 #endif /* RMT_WILL_WATCH */ 3000 } 3001 } 3002 } 3003 Trace_Log(MAKEINTR, 0); 3004 exit(signo); 3005 } 3006 3007 /* 3008 *----------------------------------------------------------------------- 3009 * Job_Finish -- 3010 * Do final processing such as the running of the commands 3011 * attached to the .END target. 3012 * 3013 * Results: 3014 * Number of errors reported. 3015 * 3016 * Side Effects: 3017 * None. 3018 *----------------------------------------------------------------------- 3019 */ 3020 int 3021 Job_Finish() 3022 { 3023 if (postCommands != NILGNODE && !Lst_IsEmpty(postCommands->commands)) { 3024 if (errors) { 3025 Error("Errors reported so .END ignored"); 3026 } else { 3027 JobStart(postCommands, JOB_SPECIAL | JOB_IGNDOTS, NULL); 3028 3029 while (nJobs) { 3030 Job_CatchOutput(); 3031 #ifndef RMT_WILL_WATCH 3032 Job_CatchChildren(!usePipes); 3033 #endif /* RMT_WILL_WATCH */ 3034 } 3035 } 3036 } 3037 Job_TokenFlush(); 3038 return(errors); 3039 } 3040 3041 /*- 3042 *----------------------------------------------------------------------- 3043 * Job_End -- 3044 * Cleanup any memory used by the jobs module 3045 * 3046 * Results: 3047 * None. 3048 * 3049 * Side Effects: 3050 * Memory is freed 3051 *----------------------------------------------------------------------- 3052 */ 3053 void 3054 Job_End() 3055 { 3056 #ifdef CLEANUP 3057 if (shellArgv) 3058 free(shellArgv); 3059 #endif 3060 } 3061 3062 /*- 3063 *----------------------------------------------------------------------- 3064 * Job_Wait -- 3065 * Waits for all running jobs to finish and returns. Sets 'aborting' 3066 * to ABORT_WAIT to prevent other jobs from starting. 3067 * 3068 * Results: 3069 * None. 3070 * 3071 * Side Effects: 3072 * Currently running jobs finish. 3073 * 3074 *----------------------------------------------------------------------- 3075 */ 3076 void 3077 Job_Wait() 3078 { 3079 aborting = ABORT_WAIT; 3080 while (nJobs != 0) { 3081 Job_CatchOutput(); 3082 #ifndef RMT_WILL_WATCH 3083 Job_CatchChildren(!usePipes); 3084 #endif /* RMT_WILL_WATCH */ 3085 } 3086 Job_TokenFlush(); 3087 aborting = 0; 3088 } 3089 3090 /*- 3091 *----------------------------------------------------------------------- 3092 * Job_AbortAll -- 3093 * Abort all currently running jobs without handling output or anything. 3094 * This function is to be called only in the event of a major 3095 * error. Most definitely NOT to be called from JobInterrupt. 3096 * 3097 * Results: 3098 * None 3099 * 3100 * Side Effects: 3101 * All children are killed, not just the firstborn 3102 *----------------------------------------------------------------------- 3103 */ 3104 void 3105 Job_AbortAll() 3106 { 3107 LstNode ln; /* element in job table */ 3108 Job *job; /* the job descriptor in that element */ 3109 int foo; 3110 3111 aborting = ABORT_ERROR; 3112 3113 if (nJobs) { 3114 3115 (void) Lst_Open(jobs); 3116 while ((ln = Lst_Next(jobs)) != NILLNODE) { 3117 job = (Job *) Lst_Datum(ln); 3118 3119 /* 3120 * kill the child process with increasingly drastic signals to make 3121 * darn sure it's dead. 3122 */ 3123 #ifdef RMT_WANTS_SIGNALS 3124 if (job->flags & JOB_REMOTE) { 3125 Rmt_Signal(job, SIGINT); 3126 Rmt_Signal(job, SIGKILL); 3127 } else { 3128 KILL(job->pid, SIGINT); 3129 KILL(job->pid, SIGKILL); 3130 } 3131 #else 3132 KILL(job->pid, SIGINT); 3133 KILL(job->pid, SIGKILL); 3134 #endif /* RMT_WANTS_SIGNALS */ 3135 } 3136 } 3137 3138 /* 3139 * Catch as many children as want to report in at first, then give up 3140 */ 3141 while (waitpid((pid_t) -1, &foo, WNOHANG) > 0) 3142 continue; 3143 } 3144 3145 #ifdef REMOTE 3146 /*- 3147 *----------------------------------------------------------------------- 3148 * JobFlagForMigration -- 3149 * Handle the eviction of a child. Called from RmtStatusChange. 3150 * Flags the child as remigratable and then suspends it. 3151 * 3152 * Results: 3153 * none. 3154 * 3155 * Side Effects: 3156 * The job descriptor is flagged for remigration. 3157 * 3158 *----------------------------------------------------------------------- 3159 */ 3160 void 3161 JobFlagForMigration(hostID) 3162 int hostID; /* ID of host we used, for matching children. */ 3163 { 3164 register Job *job; /* job descriptor for dead child */ 3165 LstNode jnode; /* list element for finding job */ 3166 3167 if (DEBUG(JOB)) { 3168 (void) fprintf(stdout, "JobFlagForMigration(%d) called.\n", hostID); 3169 (void) fflush(stdout); 3170 } 3171 jnode = Lst_Find(jobs, (ClientData)hostID, JobCmpRmtID); 3172 3173 if (jnode == NILLNODE) { 3174 jnode = Lst_Find(stoppedJobs, (ClientData)hostID, JobCmpRmtID); 3175 if (jnode == NILLNODE) { 3176 if (DEBUG(JOB)) { 3177 Error("Evicting host(%d) not in table", hostID); 3178 } 3179 return; 3180 } 3181 } 3182 job = (Job *) Lst_Datum(jnode); 3183 3184 if (DEBUG(JOB)) { 3185 (void) fprintf(stdout, 3186 "JobFlagForMigration(%d) found job '%s'.\n", hostID, 3187 job->node->name); 3188 (void) fflush(stdout); 3189 } 3190 3191 KILL(job->pid, SIGSTOP); 3192 3193 job->flags |= JOB_REMIGRATE; 3194 } 3195 3196 #endif 3197 3198 /*- 3200 *----------------------------------------------------------------------- 3201 * JobRestartJobs -- 3202 * Tries to restart stopped jobs if there are slots available. 3203 * Note that this tries to restart them regardless of pending errors. 3204 * It's not good to leave stopped jobs lying around! 3205 * 3206 * Results: 3207 * None. 3208 * 3209 * Side Effects: 3210 * Resumes(and possibly migrates) jobs. 3211 * 3212 *----------------------------------------------------------------------- 3213 */ 3214 static void 3215 JobRestartJobs() 3216 { 3217 while (!Lst_IsEmpty(stoppedJobs)) { 3218 if (DEBUG(JOB)) { 3219 (void) fprintf(stdout, "Restarting a stopped job.\n"); 3220 (void) fflush(stdout); 3221 } 3222 JobRestart((Job *)Lst_DeQueue(stoppedJobs)); 3223 } 3224 } 3225 3226 #ifndef RMT_WILL_WATCH 3227 #ifndef USE_SELECT 3228 static void 3229 watchfd(job) 3230 Job *job; 3231 { 3232 int i; 3233 if (job->inPollfd != NULL) 3234 Punt("Watching watched job"); 3235 if (fds == NULL) { 3236 maxfds = JBSTART; 3237 fds = emalloc(sizeof(struct pollfd) * maxfds); 3238 jobfds = emalloc(sizeof(Job **) * maxfds); 3239 3240 fds[0].fd = job_pipe[0]; 3241 fds[0].events = POLLIN; 3242 jobfds[0] = &tokenWaitJob; 3243 tokenWaitJob.inPollfd = &fds[0]; 3244 nfds++; 3245 } else if (nfds == maxfds) { 3246 maxfds *= JBFACTOR; 3247 fds = erealloc(fds, sizeof(struct pollfd) * maxfds); 3248 jobfds = erealloc(jobfds, sizeof(Job **) * maxfds); 3249 for (i = 0; i < nfds; i++) 3250 jobfds[i]->inPollfd = &fds[i]; 3251 } 3252 3253 fds[nfds].fd = job->inPipe; 3254 fds[nfds].events = POLLIN; 3255 jobfds[nfds] = job; 3256 job->inPollfd = &fds[nfds]; 3257 nfds++; 3258 } 3259 3260 static void 3261 clearfd(job) 3262 Job *job; 3263 { 3264 int i; 3265 if (job->inPollfd == NULL) 3266 Punt("Unwatching unwatched job"); 3267 i = job->inPollfd - fds; 3268 nfds--; 3269 /* 3270 * Move last job in table into hole made by dead job. 3271 */ 3272 if (nfds != i) { 3273 fds[i] = fds[nfds]; 3274 jobfds[i] = jobfds[nfds]; 3275 jobfds[i]->inPollfd = &fds[i]; 3276 } 3277 job->inPollfd = NULL; 3278 } 3279 3280 static int 3281 readyfd(job) 3282 Job *job; 3283 { 3284 if (job->inPollfd == NULL) 3285 Punt("Polling unwatched job"); 3286 return (job->inPollfd->revents & POLLIN) != 0; 3287 } 3288 #endif 3289 #endif 3290 3291 /*- 3292 *----------------------------------------------------------------------- 3293 * JobTokenAdd -- 3294 * Put a token into the job pipe so that some make process can start 3295 * another job. 3296 * 3297 * Side Effects: 3298 * Allows more build jobs to be spawned somewhere. 3299 * 3300 *----------------------------------------------------------------------- 3301 */ 3302 3303 static void 3304 JobTokenAdd() 3305 { 3306 3307 if (DEBUG(JOB)) 3308 printf("deposit token\n"); 3309 write(job_pipe[1], "+", 1); 3310 } 3311 3312 /*- 3313 *----------------------------------------------------------------------- 3314 * Job_ServerStartTokenAdd -- 3315 * Prep the job token pipe in the root make process. 3316 * 3317 *----------------------------------------------------------------------- 3318 */ 3319 3320 void Job_ServerStart(maxproc) 3321 int maxproc; 3322 { 3323 int i, flags; 3324 char jobarg[64]; 3325 3326 if (pipe(job_pipe) < 0) 3327 Fatal ("error in pipe: %s", strerror(errno)); 3328 3329 /* 3330 * We mark the input side of the pipe non-blocking; we poll(2) the 3331 * pipe when we're waiting for a job token, but we might lose the 3332 * race for the token when a new one becomes available, so the read 3333 * from the pipe should not block. 3334 */ 3335 flags = fcntl(job_pipe[0], F_GETFL, 0); 3336 flags |= O_NONBLOCK; 3337 fcntl(job_pipe[0], F_SETFL, flags); 3338 3339 /* 3340 * Mark job pipes as close-on-exec. 3341 * Note that we will clear this when executing submakes. 3342 */ 3343 fcntl(job_pipe[0], F_SETFD, 1); 3344 fcntl(job_pipe[1], F_SETFD, 1); 3345 3346 snprintf(jobarg, sizeof(jobarg), "%d,%d", job_pipe[0], job_pipe[1]); 3347 3348 Var_Append(MAKEFLAGS, "-J", VAR_GLOBAL); 3349 Var_Append(MAKEFLAGS, jobarg, VAR_GLOBAL); 3350 3351 /* 3352 * Preload job_pipe with one token per job, save the one 3353 * "extra" token for the primary job. 3354 * 3355 * XXX should clip maxJobs against PIPE_BUF -- if maxJobs is 3356 * larger than the write buffer size of the pipe, we will 3357 * deadlock here. 3358 */ 3359 for (i=1; i < maxproc; i++) 3360 JobTokenAdd(); 3361 } 3362 3363 /* 3364 * this tracks the number of tokens currently "out" to build jobs. 3365 */ 3366 int jobTokensRunning = 0; 3367 int jobTokensFree = 0; 3368 /*- 3369 *----------------------------------------------------------------------- 3370 * Job_TokenReturn -- 3371 * Return a withdrawn token to the pool. 3372 * 3373 *----------------------------------------------------------------------- 3374 */ 3375 3376 void 3377 Job_TokenReturn() 3378 { 3379 jobTokensRunning--; 3380 if (jobTokensRunning < 0) 3381 Punt("token botch"); 3382 if (jobTokensRunning) 3383 jobTokensFree++; 3384 } 3385 3386 /*- 3387 *----------------------------------------------------------------------- 3388 * Job_TokenWithdraw -- 3389 * Attempt to withdraw a token from the pool. 3390 * 3391 * Results: 3392 * Returns TRUE if a token was withdrawn, and FALSE if the pool 3393 * is currently empty. 3394 * 3395 * Side Effects: 3396 * If pool is empty, set wantToken so that we wake up 3397 * when a token is released. 3398 * 3399 *----------------------------------------------------------------------- 3400 */ 3401 3402 3403 Boolean 3404 Job_TokenWithdraw() 3405 { 3406 char tok; 3407 int count; 3408 3409 if (aborting) 3410 return FALSE; 3411 3412 if (jobTokensRunning == 0) { 3413 if (DEBUG(JOB)) 3414 printf("first one's free\n"); 3415 jobTokensRunning++; 3416 wantToken = FALSE; 3417 return TRUE; 3418 } 3419 if (jobTokensFree > 0) { 3420 jobTokensFree--; 3421 jobTokensRunning++; 3422 wantToken = FALSE; 3423 return TRUE; 3424 } 3425 count = read(job_pipe[0], &tok, 1); 3426 if (count == 0) 3427 Fatal("eof on job pipe!"); 3428 else if (count < 0) { 3429 if (errno != EAGAIN) { 3430 Fatal("job pipe read: %s", strerror(errno)); 3431 } 3432 if (DEBUG(JOB)) 3433 printf("blocked for token\n"); 3434 wantToken = TRUE; 3435 return FALSE; 3436 } 3437 wantToken = FALSE; 3438 jobTokensRunning++; 3439 if (DEBUG(JOB)) 3440 printf("withdrew token\n"); 3441 return TRUE; 3442 } 3443 3444 /*- 3445 *----------------------------------------------------------------------- 3446 * Job_TokenFlush -- 3447 * Return free tokens to the pool. 3448 * 3449 *----------------------------------------------------------------------- 3450 */ 3451 3452 void 3453 Job_TokenFlush() 3454 { 3455 if (compatMake) return; 3456 3457 while (jobTokensFree > 0) { 3458 JobTokenAdd(); 3459 jobTokensFree--; 3460 } 3461 } 3462 3463
Indexes created Thu Sep 25 16:09:42 GMT 2025