job.c revision 1.41
1 /* $NetBSD: job.c,v 1.41 2000/12/30 02:51:21 sommerfeld Exp $ */ 2 3 /* 4 * Copyright (c) 1988, 1989, 1990 The Regents of the University of California. 5 * Copyright (c) 1988, 1989 by Adam de Boor 6 * Copyright (c) 1989 by Berkeley Softworks 7 * All rights reserved. 8 * 9 * This code is derived from software contributed to Berkeley by 10 * Adam de Boor. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. All advertising materials mentioning features or use of this software 21 * must display the following acknowledgement: 22 * This product includes software developed by the University of 23 * California, Berkeley and its contributors. 24 * 4. Neither the name of the University nor the names of its contributors 25 * may be used to endorse or promote products derived from this software 26 * without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 * SUCH DAMAGE. 39 */ 40 41 #ifdef MAKE_BOOTSTRAP 42 static char rcsid[] = "$NetBSD: job.c,v 1.41 2000/12/30 02:51:21 sommerfeld Exp $"; 43 #else 44 #include <sys/cdefs.h> 45 #ifndef lint 46 #if 0 47 static char sccsid[] = "@(#)job.c 8.2 (Berkeley) 3/19/94"; 48 #else 49 __RCSID("$NetBSD: job.c,v 1.41 2000/12/30 02:51:21 sommerfeld Exp $"); 50 #endif 51 #endif /* not lint */ 52 #endif 53 54 /*- 55 * job.c -- 56 * handle the creation etc. of our child processes. 57 * 58 * Interface: 59 * Job_Make Start the creation of the given target. 60 * 61 * Job_CatchChildren Check for and handle the termination of any 62 * children. This must be called reasonably 63 * frequently to keep the whole make going at 64 * a decent clip, since job table entries aren't 65 * removed until their process is caught this way. 66 * Its single argument is TRUE if the function 67 * should block waiting for a child to terminate. 68 * 69 * Job_CatchOutput Print any output our children have produced. 70 * Should also be called fairly frequently to 71 * keep the user informed of what's going on. 72 * If no output is waiting, it will block for 73 * a time given by the SEL_* constants, below, 74 * or until output is ready. 75 * 76 * Job_Init Called to intialize this module. in addition, 77 * any commands attached to the .BEGIN target 78 * are executed before this function returns. 79 * Hence, the makefile must have been parsed 80 * before this function is called. 81 * 82 * Job_End Cleanup any memory used. 83 * 84 * Job_Empty Return TRUE if the job table is completely 85 * empty. 86 * 87 * Job_ParseShell Given the line following a .SHELL target, parse 88 * the line as a shell specification. Returns 89 * FAILURE if the spec was incorrect. 90 * 91 * Job_Finish Perform any final processing which needs doing. 92 * This includes the execution of any commands 93 * which have been/were attached to the .END 94 * target. It should only be called when the 95 * job table is empty. 96 * 97 * Job_AbortAll Abort all currently running jobs. It doesn't 98 * handle output or do anything for the jobs, 99 * just kills them. It should only be called in 100 * an emergency, as it were. 101 * 102 * Job_CheckCommands Verify that the commands for a target are 103 * ok. Provide them if necessary and possible. 104 * 105 * Job_Touch Update a target without really updating it. 106 * 107 * Job_Wait Wait for all currently-running jobs to finish. 108 */ 109 110 #include <sys/types.h> 111 #include <sys/stat.h> 112 #include <sys/file.h> 113 #include <sys/time.h> 114 #include <sys/wait.h> 115 #include <fcntl.h> 116 #include <errno.h> 117 #include <utime.h> 118 #include <stdio.h> 119 #include <string.h> 120 #include <signal.h> 121 #ifndef RMT_WILL_WATCH 122 #ifndef USE_SELECT 123 #include <poll.h> 124 #endif 125 #endif 126 #include "make.h" 127 #include "hash.h" 128 #include "dir.h" 129 #include "job.h" 130 #include "pathnames.h" 131 #include "trace.h" 132 #ifdef REMOTE 133 #include "rmt.h" 134 # define STATIC 135 #else 136 # define STATIC static 137 #endif 138 139 /* 140 * error handling variables 141 */ 142 static int errors = 0; /* number of errors reported */ 143 static int aborting = 0; /* why is the make aborting? */ 144 #define ABORT_ERROR 1 /* Because of an error */ 145 #define ABORT_INTERRUPT 2 /* Because it was interrupted */ 146 #define ABORT_WAIT 3 /* Waiting for jobs to finish */ 147 148 /* 149 * XXX: Avoid SunOS bug... FILENO() is fp->_file, and file 150 * is a char! So when we go above 127 we turn negative! 151 */ 152 #define FILENO(a) ((unsigned) fileno(a)) 153 154 /* 155 * post-make command processing. The node postCommands is really just the 156 * .END target but we keep it around to avoid having to search for it 157 * all the time. 158 */ 159 static GNode *postCommands; /* node containing commands to execute when 160 * everything else is done */ 161 static int numCommands; /* The number of commands actually printed 162 * for a target. Should this number be 163 * 0, no shell will be executed. */ 164 165 /* 166 * Return values from JobStart. 167 */ 168 #define JOB_RUNNING 0 /* Job is running */ 169 #define JOB_ERROR 1 /* Error in starting the job */ 170 #define JOB_FINISHED 2 /* The job is already finished */ 171 #define JOB_STOPPED 3 /* The job is stopped */ 172 173 174 175 /* 176 * Descriptions for various shells. 177 */ 178 static Shell shells[] = { 179 /* 180 * CSH description. The csh can do echo control by playing 181 * with the setting of the 'echo' shell variable. Sadly, 182 * however, it is unable to do error control nicely. 183 */ 184 { 185 "csh", 186 TRUE, "unset verbose", "set verbose", "unset verbose", 10, 187 FALSE, "echo \"%s\"\n", "csh -c \"%s || exit 0\"", 188 "v", "e", 189 }, 190 /* 191 * SH description. Echo control is also possible and, under 192 * sun UNIX anyway, one can even control error checking. 193 */ 194 { 195 "sh", 196 TRUE, "set -", "set -v", "set -", 5, 197 TRUE, "set -e", "set +e", 198 #ifdef OLDBOURNESHELL 199 FALSE, "echo \"%s\"\n", "sh -c '%s || exit 0'\n", 200 #endif 201 #ifdef __NetBSD__ 202 "vq", 203 #else 204 "v", 205 #endif 206 "e", 207 }, 208 /* 209 * UNKNOWN. 210 */ 211 { 212 (char *) 0, 213 FALSE, (char *) 0, (char *) 0, (char *) 0, 0, 214 FALSE, (char *) 0, (char *) 0, 215 (char *) 0, (char *) 0, 216 } 217 }; 218 static Shell *commandShell = &shells[DEFSHELL];/* this is the shell to 219 * which we pass all 220 * commands in the Makefile. 221 * It is set by the 222 * Job_ParseShell function */ 223 static char *shellPath = NULL, /* full pathname of 224 * executable image */ 225 *shellName = NULL, /* last component of shell */ 226 *shellArgv = NULL; /* Custom shell args */ 227 228 229 static int maxJobs; /* The most children we can run at once */ 230 static int maxLocal; /* The most local ones we can have */ 231 STATIC int nJobs; /* The number of children currently running */ 232 STATIC int nLocal; /* The number of local children */ 233 STATIC Lst jobs; /* The structures that describe them */ 234 static Boolean wantToken; /* we want a token */ 235 236 /* 237 * Set of descriptors of pipes connected to 238 * the output channels of children 239 */ 240 #ifndef RMT_WILL_WATCH 241 #ifdef USE_SELECT 242 static fd_set outputs; 243 #else 244 static struct pollfd *fds = NULL; 245 static Job **jobfds = NULL; 246 static int nfds = 0; 247 static int maxfds = 0; 248 static void watchfd __P((Job *)); 249 static void clearfd __P((Job *)); 250 static int readyfd __P((Job *)); 251 #define JBSTART 256 252 #define JBFACTOR 2 253 #endif 254 #endif 255 256 STATIC GNode *lastNode; /* The node for which output was most recently 257 * produced. */ 258 STATIC char *targFmt; /* Format string to use to head output from a 259 * job when it's not the most-recent job heard 260 * from */ 261 static Job tokenWaitJob; /* token wait pseudo-job */ 262 int job_pipe[2] = { -1, -1 }; /* job server pipes. */ 263 264 #ifdef REMOTE 265 # define TARG_FMT "--- %s at %s ---\n" /* Default format */ 266 # define MESSAGE(fp, gn) \ 267 (void) fprintf(fp, targFmt, gn->name, gn->rem.hname) 268 #else 269 # define TARG_FMT "--- %s ---\n" /* Default format */ 270 # define MESSAGE(fp, gn) \ 271 (void) fprintf(fp, targFmt, gn->name) 272 #endif 273 274 /* 275 * When JobStart attempts to run a job remotely but can't, and isn't allowed 276 * to run the job locally, or when Job_CatchChildren detects a job that has 277 * been migrated home, the job is placed on the stoppedJobs queue to be run 278 * when the next job finishes. 279 */ 280 STATIC Lst stoppedJobs; /* Lst of Job structures describing 281 * jobs that were stopped due to concurrency 282 * limits or migration home */ 283 284 285 #if defined(USE_PGRP) && defined(SYSV) 286 # define KILL(pid, sig) kill(-(pid), (sig)) 287 #else 288 # if defined(USE_PGRP) 289 # define KILL(pid, sig) killpg((pid), (sig)) 290 # else 291 # define KILL(pid, sig) kill((pid), (sig)) 292 # endif 293 #endif 294 295 /* 296 * Grmpf... There is no way to set bits of the wait structure 297 * anymore with the stupid W*() macros. I liked the union wait 298 * stuff much more. So, we devise our own macros... This is 299 * really ugly, use dramamine sparingly. You have been warned. 300 */ 301 #ifndef W_STOPCODE 302 #define W_STOPCODE(sig) (((sig) << 8) | 0177) 303 #endif 304 #ifndef W_EXITCODE 305 #define W_EXITCODE(ret, sig) ((ret << 8) | (sig)) 306 #endif 307 308 static int JobCondPassSig __P((ClientData, ClientData)); 309 static void JobPassSig __P((int)); 310 static void JobIgnoreSig __P((int)); 311 static int JobCmpPid __P((ClientData, ClientData)); 312 static int JobPrintCommand __P((ClientData, ClientData)); 313 static int JobSaveCommand __P((ClientData, ClientData)); 314 static void JobClose __P((Job *)); 315 #ifdef REMOTE 316 static int JobCmpRmtID __P((Job *, int)); 317 # ifdef RMT_WILL_WATCH 318 static void JobLocalInput __P((int, Job *)); 319 # endif 320 #else 321 static void JobFinish __P((Job *, int *)); 322 static void JobExec __P((Job *, char **)); 323 #endif 324 static void JobMakeArgv __P((Job *, char **)); 325 static void JobRestart __P((Job *)); 326 static int JobStart __P((GNode *, int, Job *)); 327 static char *JobOutput __P((Job *, char *, char *, int)); 328 static void JobDoOutput __P((Job *, Boolean)); 329 static Shell *JobMatchShell __P((char *)); 330 static void JobInterrupt __P((int, int)); 331 static void JobRestartJobs __P((void)); 332 static void JobTokenAdd __P((void)); 333 334 /*- 335 *----------------------------------------------------------------------- 336 * JobCondPassSig -- 337 * Pass a signal to a job if the job is remote or if USE_PGRP 338 * is defined. 339 * 340 * Results: 341 * === 0 342 * 343 * Side Effects: 344 * None, except the job may bite it. 345 * 346 *----------------------------------------------------------------------- 347 */ 348 static int 349 JobCondPassSig(jobp, signop) 350 ClientData jobp; /* Job to biff */ 351 ClientData signop; /* Signal to send it */ 352 { 353 Job *job = (Job *) jobp; 354 int signo = *(int *) signop; 355 #ifdef RMT_WANTS_SIGNALS 356 if (job->flags & JOB_REMOTE) { 357 (void) Rmt_Signal(job, signo); 358 } else { 359 KILL(job->pid, signo); 360 } 361 #else 362 /* 363 * Assume that sending the signal to job->pid will signal any remote 364 * job as well. 365 */ 366 if (DEBUG(JOB)) { 367 (void) fprintf(stdout, 368 "JobCondPassSig passing signal %d to child %d.\n", 369 signo, job->pid); 370 (void) fflush(stdout); 371 } 372 KILL(job->pid, signo); 373 #endif 374 return 0; 375 } 376 377 /*- 378 *----------------------------------------------------------------------- 379 * JobIgnoreSig -- 380 * No-op signal handler so we wake up from poll. 381 * 382 * Results: 383 * None. 384 * 385 * Side Effects: 386 * None. 387 * 388 *----------------------------------------------------------------------- 389 */ 390 static void 391 JobIgnoreSig(signo) 392 int signo; /* The signal number we've received */ 393 { 394 /* 395 * Do nothing. The mere fact that we've been called will cause 396 * poll/select in Job_CatchOutput() to return early. 397 */ 398 } 399 400 401 402 /*- 403 *----------------------------------------------------------------------- 404 * JobPassSig -- 405 * Pass a signal on to all remote jobs and to all local jobs if 406 * USE_PGRP is defined, then die ourselves. 407 * 408 * Results: 409 * None. 410 * 411 * Side Effects: 412 * We die by the same signal. 413 * 414 *----------------------------------------------------------------------- 415 */ 416 static void 417 JobPassSig(signo) 418 int signo; /* The signal number we've received */ 419 { 420 sigset_t nmask, omask; 421 struct sigaction act; 422 int sigcont; 423 424 if (DEBUG(JOB)) { 425 (void) fprintf(stdout, "JobPassSig(%d) called.\n", signo); 426 (void) fflush(stdout); 427 } 428 Lst_ForEach(jobs, JobCondPassSig, (ClientData) &signo); 429 430 /* 431 * Deal with proper cleanup based on the signal received. We only run 432 * the .INTERRUPT target if the signal was in fact an interrupt. The other 433 * three termination signals are more of a "get out *now*" command. 434 */ 435 if (signo == SIGINT) { 436 JobInterrupt(TRUE, signo); 437 } else if ((signo == SIGHUP) || (signo == SIGTERM) || (signo == SIGQUIT)) { 438 JobInterrupt(FALSE, signo); 439 } 440 441 /* 442 * Leave gracefully if SIGQUIT, rather than core dumping. 443 */ 444 if (signo == SIGQUIT) { 445 Finish(0); 446 } 447 448 /* 449 * Send ourselves the signal now we've given the message to everyone else. 450 * Note we block everything else possible while we're getting the signal. 451 * This ensures that all our jobs get continued when we wake up before 452 * we take any other signal. 453 */ 454 sigfillset(&nmask); 455 sigprocmask(SIG_SETMASK, &nmask, &omask); 456 act.sa_handler = SIG_DFL; 457 sigemptyset(&act.sa_mask); 458 act.sa_flags = 0; 459 sigaction(signo, &act, NULL); 460 461 if (DEBUG(JOB)) { 462 (void) fprintf(stdout, 463 "JobPassSig passing signal to self, mask = %x.\n", 464 ~0 & ~(1 << (signo-1))); 465 (void) fflush(stdout); 466 } 467 468 (void) kill(getpid(), signo); 469 if (signo != SIGTSTP) { 470 sigcont = SIGCONT; 471 Lst_ForEach(jobs, JobCondPassSig, (ClientData) &sigcont); 472 } 473 474 (void) sigprocmask(SIG_SETMASK, &omask, NULL); 475 sigprocmask(SIG_SETMASK, &omask, NULL); 476 if (signo != SIGCONT && signo != SIGTSTP) { 477 act.sa_handler = JobPassSig; 478 sigaction(sigcont, &act, NULL); 479 } 480 } 481 482 /*- 483 *----------------------------------------------------------------------- 484 * JobCmpPid -- 485 * Compare the pid of the job with the given pid and return 0 if they 486 * are equal. This function is called from Job_CatchChildren via 487 * Lst_Find to find the job descriptor of the finished job. 488 * 489 * Results: 490 * 0 if the pid's match 491 * 492 * Side Effects: 493 * None 494 *----------------------------------------------------------------------- 495 */ 496 static int 497 JobCmpPid(job, pid) 498 ClientData job; /* job to examine */ 499 ClientData pid; /* process id desired */ 500 { 501 return *(int *) pid - ((Job *) job)->pid; 502 } 503 504 #ifdef REMOTE 505 /*- 506 *----------------------------------------------------------------------- 507 * JobCmpRmtID -- 508 * Compare the rmtID of the job with the given rmtID and return 0 if they 509 * are equal. 510 * 511 * Results: 512 * 0 if the rmtID's match 513 * 514 * Side Effects: 515 * None. 516 *----------------------------------------------------------------------- 517 */ 518 static int 519 JobCmpRmtID(job, rmtID) 520 ClientData job; /* job to examine */ 521 ClientData rmtID; /* remote id desired */ 522 { 523 return(*(int *) rmtID - *(int *) job->rmtID); 524 } 525 #endif 526 527 /*- 528 *----------------------------------------------------------------------- 529 * JobPrintCommand -- 530 * Put out another command for the given job. If the command starts 531 * with an @ or a - we process it specially. In the former case, 532 * so long as the -s and -n flags weren't given to make, we stick 533 * a shell-specific echoOff command in the script. In the latter, 534 * we ignore errors for the entire job, unless the shell has error 535 * control. 536 * If the command is just "..." we take all future commands for this 537 * job to be commands to be executed once the entire graph has been 538 * made and return non-zero to signal that the end of the commands 539 * was reached. These commands are later attached to the postCommands 540 * node and executed by Job_End when all things are done. 541 * This function is called from JobStart via Lst_ForEach. 542 * 543 * Results: 544 * Always 0, unless the command was "..." 545 * 546 * Side Effects: 547 * If the command begins with a '-' and the shell has no error control, 548 * the JOB_IGNERR flag is set in the job descriptor. 549 * If the command is "..." and we're not ignoring such things, 550 * tailCmds is set to the successor node of the cmd. 551 * numCommands is incremented if the command is actually printed. 552 *----------------------------------------------------------------------- 553 */ 554 static int 555 JobPrintCommand(cmdp, jobp) 556 ClientData cmdp; /* command string to print */ 557 ClientData jobp; /* job for which to print it */ 558 { 559 Boolean noSpecials; /* true if we shouldn't worry about 560 * inserting special commands into 561 * the input stream. */ 562 Boolean shutUp = FALSE; /* true if we put a no echo command 563 * into the command file */ 564 Boolean errOff = FALSE; /* true if we turned error checking 565 * off before printing the command 566 * and need to turn it back on */ 567 char *cmdTemplate; /* Template to use when printing the 568 * command */ 569 char *cmdStart; /* Start of expanded command */ 570 LstNode cmdNode; /* Node for replacing the command */ 571 char *cmd = (char *) cmdp; 572 Job *job = (Job *) jobp; 573 char *cp; 574 575 noSpecials = noExecute && !(job->node->type & OP_MAKE); 576 577 if (strcmp(cmd, "...") == 0) { 578 job->node->type |= OP_SAVE_CMDS; 579 if ((job->flags & JOB_IGNDOTS) == 0) { 580 job->tailCmds = Lst_Succ(Lst_Member(job->node->commands, 581 (ClientData)cmd)); 582 return 1; 583 } 584 return 0; 585 } 586 587 #define DBPRINTF(fmt, arg) if (DEBUG(JOB)) { \ 588 (void) fprintf(stdout, fmt, arg); \ 589 (void) fflush(stdout); \ 590 } \ 591 (void) fprintf(job->cmdFILE, fmt, arg); \ 592 (void) fflush(job->cmdFILE); 593 594 numCommands += 1; 595 596 /* 597 * For debugging, we replace each command with the result of expanding 598 * the variables in the command. 599 */ 600 cmdNode = Lst_Member(job->node->commands, (ClientData)cmd); 601 cmdStart = cmd = Var_Subst(NULL, cmd, job->node, FALSE); 602 Lst_Replace(cmdNode, (ClientData)cmdStart); 603 604 cmdTemplate = "%s\n"; 605 606 /* 607 * Check for leading @' and -'s to control echoing and error checking. 608 */ 609 while (*cmd == '@' || *cmd == '-') { 610 if (*cmd == '@') { 611 shutUp = TRUE; 612 } else { 613 errOff = TRUE; 614 } 615 cmd++; 616 } 617 618 while (isspace((unsigned char) *cmd)) 619 cmd++; 620 621 if (shutUp) { 622 if (!(job->flags & JOB_SILENT) && !noSpecials && 623 commandShell->hasEchoCtl) { 624 DBPRINTF("%s\n", commandShell->echoOff); 625 } else { 626 shutUp = FALSE; 627 } 628 } 629 630 if (errOff) { 631 if ( !(job->flags & JOB_IGNERR) && !noSpecials) { 632 if (commandShell->hasErrCtl) { 633 /* 634 * we don't want the error-control commands showing 635 * up either, so we turn off echoing while executing 636 * them. We could put another field in the shell 637 * structure to tell JobDoOutput to look for this 638 * string too, but why make it any more complex than 639 * it already is? 640 */ 641 if (!(job->flags & JOB_SILENT) && !shutUp && 642 commandShell->hasEchoCtl) { 643 DBPRINTF("%s\n", commandShell->echoOff); 644 DBPRINTF("%s\n", commandShell->ignErr); 645 DBPRINTF("%s\n", commandShell->echoOn); 646 } else { 647 DBPRINTF("%s\n", commandShell->ignErr); 648 } 649 } else if (commandShell->ignErr && 650 (*commandShell->ignErr != '\0')) 651 { 652 /* 653 * The shell has no error control, so we need to be 654 * weird to get it to ignore any errors from the command. 655 * If echoing is turned on, we turn it off and use the 656 * errCheck template to echo the command. Leave echoing 657 * off so the user doesn't see the weirdness we go through 658 * to ignore errors. Set cmdTemplate to use the weirdness 659 * instead of the simple "%s\n" template. 660 */ 661 if (!(job->flags & JOB_SILENT) && !shutUp && 662 commandShell->hasEchoCtl) { 663 DBPRINTF("%s\n", commandShell->echoOff); 664 DBPRINTF(commandShell->errCheck, cmd); 665 shutUp = TRUE; 666 } 667 cmdTemplate = commandShell->ignErr; 668 /* 669 * The error ignoration (hee hee) is already taken care 670 * of by the ignErr template, so pretend error checking 671 * is still on. 672 */ 673 errOff = FALSE; 674 } else { 675 errOff = FALSE; 676 } 677 } else { 678 errOff = FALSE; 679 } 680 } 681 682 if ((cp = Check_Cwd_Cmd(cmd)) != NULL) { 683 DBPRINTF("cd %s; ", cp); 684 } 685 DBPRINTF(cmdTemplate, cmd); 686 free(cmdStart); 687 688 if (errOff) { 689 /* 690 * If echoing is already off, there's no point in issuing the 691 * echoOff command. Otherwise we issue it and pretend it was on 692 * for the whole command... 693 */ 694 if (!shutUp && !(job->flags & JOB_SILENT) && commandShell->hasEchoCtl){ 695 DBPRINTF("%s\n", commandShell->echoOff); 696 shutUp = TRUE; 697 } 698 DBPRINTF("%s\n", commandShell->errCheck); 699 } 700 if (shutUp) { 701 DBPRINTF("%s\n", commandShell->echoOn); 702 } 703 return 0; 704 } 705 706 /*- 707 *----------------------------------------------------------------------- 708 * JobSaveCommand -- 709 * Save a command to be executed when everything else is done. 710 * Callback function for JobFinish... 711 * 712 * Results: 713 * Always returns 0 714 * 715 * Side Effects: 716 * The command is tacked onto the end of postCommands's commands list. 717 * 718 *----------------------------------------------------------------------- 719 */ 720 static int 721 JobSaveCommand(cmd, gn) 722 ClientData cmd; 723 ClientData gn; 724 { 725 cmd = (ClientData) Var_Subst(NULL, (char *) cmd, (GNode *) gn, FALSE); 726 (void) Lst_AtEnd(postCommands->commands, cmd); 727 return(0); 728 } 729 730 731 /*- 732 *----------------------------------------------------------------------- 733 * JobClose -- 734 * Called to close both input and output pipes when a job is finished. 735 * 736 * Results: 737 * Nada 738 * 739 * Side Effects: 740 * The file descriptors associated with the job are closed. 741 * 742 *----------------------------------------------------------------------- 743 */ 744 static void 745 JobClose(job) 746 Job *job; 747 { 748 if (usePipes && (job->flags & JOB_FIRST)) { 749 #ifdef RMT_WILL_WATCH 750 Rmt_Ignore(job->inPipe); 751 #else 752 #ifdef USE_SELECT 753 FD_CLR(job->inPipe, &outputs); 754 #else 755 clearfd(job); 756 #endif 757 #endif 758 if (job->outPipe != job->inPipe) { 759 (void) close(job->outPipe); 760 } 761 JobDoOutput(job, TRUE); 762 (void) close(job->inPipe); 763 } else { 764 (void) close(job->outFd); 765 JobDoOutput(job, TRUE); 766 } 767 } 768 769 /*- 770 *----------------------------------------------------------------------- 771 * JobFinish -- 772 * Do final processing for the given job including updating 773 * parents and starting new jobs as available/necessary. Note 774 * that we pay no attention to the JOB_IGNERR flag here. 775 * This is because when we're called because of a noexecute flag 776 * or something, jstat.w_status is 0 and when called from 777 * Job_CatchChildren, the status is zeroed if it s/b ignored. 778 * 779 * Results: 780 * None 781 * 782 * Side Effects: 783 * Some nodes may be put on the toBeMade queue. 784 * Final commands for the job are placed on postCommands. 785 * 786 * If we got an error and are aborting (aborting == ABORT_ERROR) and 787 * the job list is now empty, we are done for the day. 788 * If we recognized an error (errors !=0), we set the aborting flag 789 * to ABORT_ERROR so no more jobs will be started. 790 *----------------------------------------------------------------------- 791 */ 792 /*ARGSUSED*/ 793 static void 794 JobFinish(job, status) 795 Job *job; /* job to finish */ 796 int *status; /* sub-why job went away */ 797 { 798 Boolean done; 799 800 if ((WIFEXITED(*status) && 801 (((WEXITSTATUS(*status) != 0) && !(job->flags & JOB_IGNERR)))) || 802 WIFSIGNALED(*status)) 803 { 804 /* 805 * If it exited non-zero and either we're doing things our 806 * way or we're not ignoring errors, the job is finished. 807 * Similarly, if the shell died because of a signal 808 * the job is also finished. In these 809 * cases, finish out the job's output before printing the exit 810 * status... 811 */ 812 #ifdef REMOTE 813 KILL(job->pid, SIGCONT); 814 #endif 815 JobClose(job); 816 if (job->cmdFILE != NULL && job->cmdFILE != stdout) { 817 (void) fclose(job->cmdFILE); 818 job->cmdFILE = NULL; 819 } 820 done = TRUE; 821 #ifdef REMOTE 822 if (job->flags & JOB_REMOTE) 823 Rmt_Done(job->rmtID, job->node); 824 #endif 825 } else if (WIFEXITED(*status)) { 826 /* 827 * Deal with ignored errors in -B mode. We need to print a message 828 * telling of the ignored error as well as setting status.w_status 829 * to 0 so the next command gets run. To do this, we set done to be 830 * TRUE if in -B mode and the job exited non-zero. 831 */ 832 done = WEXITSTATUS(*status) != 0; 833 /* 834 * Old comment said: "Note we don't 835 * want to close down any of the streams until we know we're at the 836 * end." 837 * But we do. Otherwise when are we going to print the rest of the 838 * stuff? 839 */ 840 JobClose(job); 841 #ifdef REMOTE 842 if (job->flags & JOB_REMOTE) 843 Rmt_Done(job->rmtID, job->node); 844 #endif /* REMOTE */ 845 } else { 846 /* 847 * No need to close things down or anything. 848 */ 849 done = FALSE; 850 } 851 852 if (done || 853 WIFSTOPPED(*status) || 854 (WIFSIGNALED(*status) && (WTERMSIG(*status) == SIGCONT))) 855 { 856 FILE *out; 857 858 if (compatMake && !usePipes && (job->flags & JOB_IGNERR)) { 859 /* 860 * If output is going to a file and this job is ignoring 861 * errors, arrange to have the exit status sent to the 862 * output file as well. 863 */ 864 out = fdopen(job->outFd, "w"); 865 if (out == NULL) 866 Punt("Cannot fdopen"); 867 } else { 868 out = stdout; 869 } 870 871 if (WIFEXITED(*status)) { 872 if (DEBUG(JOB)) { 873 (void) fprintf(stdout, "Process %d exited.\n", job->pid); 874 (void) fflush(stdout); 875 } 876 if (WEXITSTATUS(*status) != 0) { 877 if (usePipes && job->node != lastNode) { 878 MESSAGE(out, job->node); 879 lastNode = job->node; 880 } 881 (void) fprintf(out, "*** Error code %d%s\n", 882 WEXITSTATUS(*status), 883 (job->flags & JOB_IGNERR) ? "(ignored)" : ""); 884 885 if (job->flags & JOB_IGNERR) { 886 *status = 0; 887 } 888 } else if (DEBUG(JOB)) { 889 if (usePipes && job->node != lastNode) { 890 MESSAGE(out, job->node); 891 lastNode = job->node; 892 } 893 (void) fprintf(out, "*** Completed successfully\n"); 894 } 895 } else if (WIFSTOPPED(*status) && WSTOPSIG(*status) != SIGCONT) { 896 if (DEBUG(JOB)) { 897 (void) fprintf(stdout, "Process %d stopped.\n", job->pid); 898 (void) fflush(stdout); 899 } 900 if (usePipes && job->node != lastNode) { 901 MESSAGE(out, job->node); 902 lastNode = job->node; 903 } 904 if (!(job->flags & JOB_REMIGRATE)) { 905 switch (WSTOPSIG(*status)) { 906 case SIGTSTP: 907 (void) fprintf(out, "*** Suspended\n"); 908 break; 909 case SIGSTOP: 910 (void) fprintf(out, "*** Stopped\n"); 911 break; 912 default: 913 (void) fprintf(out, "*** Stopped -- signal %d\n", 914 WSTOPSIG(*status)); 915 } 916 } 917 job->flags |= JOB_RESUME; 918 (void)Lst_AtEnd(stoppedJobs, (ClientData)job); 919 #ifdef REMOTE 920 if (job->flags & JOB_REMIGRATE) 921 JobRestart(job); 922 #endif 923 (void) fflush(out); 924 return; 925 } else if (WIFSTOPPED(*status) && WSTOPSIG(*status) == SIGCONT) { 926 /* 927 * If the beastie has continued, shift the Job from the stopped 928 * list to the running one (or re-stop it if concurrency is 929 * exceeded) and go and get another child. 930 */ 931 if (job->flags & (JOB_RESUME|JOB_REMIGRATE|JOB_RESTART)) { 932 if (usePipes && job->node != lastNode) { 933 MESSAGE(out, job->node); 934 lastNode = job->node; 935 } 936 (void) fprintf(out, "*** Continued\n"); 937 } 938 if (!(job->flags & JOB_CONTINUING)) { 939 if (DEBUG(JOB)) { 940 (void) fprintf(stdout, 941 "Warning: process %d was not continuing.\n", 942 job->pid); 943 (void) fflush(stdout); 944 } 945 #ifdef notdef 946 /* 947 * We don't really want to restart a job from scratch just 948 * because it continued, especially not without killing the 949 * continuing process! That's why this is ifdef'ed out. 950 * FD - 9/17/90 951 */ 952 JobRestart(job); 953 #endif 954 } 955 job->flags &= ~JOB_CONTINUING; 956 Lst_AtEnd(jobs, (ClientData)job); 957 nJobs += 1; 958 if (!(job->flags & JOB_REMOTE)) { 959 if (DEBUG(JOB)) { 960 (void) fprintf(stdout, 961 "Process %d is continuing locally.\n", 962 job->pid); 963 (void) fflush(stdout); 964 } 965 nLocal += 1; 966 } 967 (void) fflush(out); 968 return; 969 } else { 970 if (usePipes && job->node != lastNode) { 971 MESSAGE(out, job->node); 972 lastNode = job->node; 973 } 974 (void) fprintf(out, "*** Signal %d\n", WTERMSIG(*status)); 975 } 976 977 (void) fflush(out); 978 } 979 980 /* 981 * Now handle the -B-mode stuff. If the beast still isn't finished, 982 * try and restart the job on the next command. If JobStart says it's 983 * ok, it's ok. If there's an error, this puppy is done. 984 */ 985 if (compatMake && (WIFEXITED(*status) && 986 !Lst_IsAtEnd(job->node->commands))) { 987 switch (JobStart(job->node, job->flags & JOB_IGNDOTS, job)) { 988 case JOB_RUNNING: 989 done = FALSE; 990 break; 991 case JOB_ERROR: 992 done = TRUE; 993 *status = W_EXITCODE(1, 0); 994 break; 995 case JOB_FINISHED: 996 /* 997 * If we got back a JOB_FINISHED code, JobStart has already 998 * called Make_Update and freed the job descriptor. We set 999 * done to false here to avoid fake cycles and double frees. 1000 * JobStart needs to do the update so we can proceed up the 1001 * graph when given the -n flag.. 1002 */ 1003 done = FALSE; 1004 break; 1005 } 1006 } else { 1007 done = TRUE; 1008 } 1009 1010 if (done) 1011 Trace_Log(JOBEND, job); 1012 1013 if (done && 1014 (aborting != ABORT_ERROR) && 1015 (aborting != ABORT_INTERRUPT) && 1016 (*status == 0)) 1017 { 1018 /* 1019 * As long as we aren't aborting and the job didn't return a non-zero 1020 * status that we shouldn't ignore, we call Make_Update to update 1021 * the parents. In addition, any saved commands for the node are placed 1022 * on the .END target. 1023 */ 1024 if (job->tailCmds != NILLNODE) { 1025 Lst_ForEachFrom(job->node->commands, job->tailCmds, 1026 JobSaveCommand, 1027 (ClientData)job->node); 1028 } 1029 job->node->made = MADE; 1030 Make_Update(job->node); 1031 free((Address)job); 1032 } else if (*status != 0) { 1033 errors += 1; 1034 free((Address)job); 1035 } 1036 if (done && (*status != 0) && !compatMake) { 1037 Job_TokenReturn(); 1038 } 1039 1040 JobRestartJobs(); 1041 1042 /* 1043 * Set aborting if any error. 1044 */ 1045 if (errors && !keepgoing && (aborting != ABORT_INTERRUPT)) { 1046 /* 1047 * If we found any errors in this batch of children and the -k flag 1048 * wasn't given, we set the aborting flag so no more jobs get 1049 * started. 1050 */ 1051 aborting = ABORT_ERROR; 1052 } 1053 1054 if ((aborting == ABORT_ERROR) && Job_Empty()) { 1055 /* 1056 * If we are aborting and the job table is now empty, we finish. 1057 */ 1058 Finish(errors); 1059 } 1060 } 1061 1062 /*- 1063 *----------------------------------------------------------------------- 1064 * Job_Touch -- 1065 * Touch the given target. Called by JobStart when the -t flag was 1066 * given 1067 * 1068 * Results: 1069 * None 1070 * 1071 * Side Effects: 1072 * The data modification of the file is changed. In addition, if the 1073 * file did not exist, it is created. 1074 *----------------------------------------------------------------------- 1075 */ 1076 void 1077 Job_Touch(gn, silent) 1078 GNode *gn; /* the node of the file to touch */ 1079 Boolean silent; /* TRUE if should not print messages */ 1080 { 1081 int streamID; /* ID of stream opened to do the touch */ 1082 struct utimbuf times; /* Times for utime() call */ 1083 1084 if (gn->type & (OP_JOIN|OP_USE|OP_EXEC|OP_OPTIONAL|OP_PHONY)) { 1085 /* 1086 * .JOIN, .USE, .ZEROTIME and .OPTIONAL targets are "virtual" targets 1087 * and, as such, shouldn't really be created. 1088 */ 1089 return; 1090 } 1091 1092 if (!silent || (noExecute && !(gn->type & OP_MAKE))) { 1093 (void) fprintf(stdout, "touch %s\n", gn->name); 1094 (void) fflush(stdout); 1095 } 1096 1097 if (noExecute && !(gn->type & OP_MAKE)) { 1098 return; 1099 } 1100 1101 if (gn->type & OP_ARCHV) { 1102 Arch_Touch(gn); 1103 } else if (gn->type & OP_LIB) { 1104 Arch_TouchLib(gn); 1105 } else { 1106 char *file = gn->path ? gn->path : gn->name; 1107 1108 times.actime = times.modtime = now; 1109 if (utime(file, ×) < 0){ 1110 streamID = open(file, O_RDWR | O_CREAT, 0666); 1111 1112 if (streamID >= 0) { 1113 char c; 1114 1115 /* 1116 * Read and write a byte to the file to change the 1117 * modification time, then close the file. 1118 */ 1119 if (read(streamID, &c, 1) == 1) { 1120 (void) lseek(streamID, (off_t)0, SEEK_SET); 1121 (void) write(streamID, &c, 1); 1122 } 1123 1124 (void) close(streamID); 1125 } else { 1126 (void) fprintf(stdout, "*** couldn't touch %s: %s", 1127 file, strerror(errno)); 1128 (void) fflush(stdout); 1129 } 1130 } 1131 } 1132 } 1133 1134 /*- 1135 *----------------------------------------------------------------------- 1136 * Job_CheckCommands -- 1137 * Make sure the given node has all the commands it needs. 1138 * 1139 * Results: 1140 * TRUE if the commands list is/was ok. 1141 * 1142 * Side Effects: 1143 * The node will have commands from the .DEFAULT rule added to it 1144 * if it needs them. 1145 *----------------------------------------------------------------------- 1146 */ 1147 Boolean 1148 Job_CheckCommands(gn, abortProc) 1149 GNode *gn; /* The target whose commands need 1150 * verifying */ 1151 void (*abortProc) __P((char *, ...)); 1152 /* Function to abort with message */ 1153 { 1154 if (OP_NOP(gn->type) && Lst_IsEmpty(gn->commands) && 1155 (gn->type & OP_LIB) == 0) { 1156 /* 1157 * No commands. Look for .DEFAULT rule from which we might infer 1158 * commands 1159 */ 1160 if ((DEFAULT != NILGNODE) && !Lst_IsEmpty(DEFAULT->commands)) { 1161 char *p1; 1162 /* 1163 * Make only looks for a .DEFAULT if the node was never the 1164 * target of an operator, so that's what we do too. If 1165 * a .DEFAULT was given, we substitute its commands for gn's 1166 * commands and set the IMPSRC variable to be the target's name 1167 * The DEFAULT node acts like a transformation rule, in that 1168 * gn also inherits any attributes or sources attached to 1169 * .DEFAULT itself. 1170 */ 1171 Make_HandleUse(DEFAULT, gn); 1172 Var_Set(IMPSRC, Var_Value(TARGET, gn, &p1), gn); 1173 if (p1) 1174 free(p1); 1175 } else if (Dir_MTime(gn) == 0) { 1176 /* 1177 * The node wasn't the target of an operator we have no .DEFAULT 1178 * rule to go on and the target doesn't already exist. There's 1179 * nothing more we can do for this branch. If the -k flag wasn't 1180 * given, we stop in our tracks, otherwise we just don't update 1181 * this node's parents so they never get examined. 1182 */ 1183 static const char msg[] = "make: don't know how to make"; 1184 1185 if (gn->type & OP_OPTIONAL) { 1186 (void) fprintf(stdout, "%s %s(ignored)\n", msg, gn->name); 1187 (void) fflush(stdout); 1188 } else if (keepgoing) { 1189 (void) fprintf(stdout, "%s %s(continuing)\n", msg, gn->name); 1190 (void) fflush(stdout); 1191 return FALSE; 1192 } else { 1193 (*abortProc)("%s %s. Stop", msg, gn->name); 1194 return FALSE; 1195 } 1196 } 1197 } 1198 return TRUE; 1199 } 1200 #ifdef RMT_WILL_WATCH 1201 /*- 1202 *----------------------------------------------------------------------- 1203 * JobLocalInput -- 1204 * Handle a pipe becoming readable. Callback function for Rmt_Watch 1205 * 1206 * Results: 1207 * None 1208 * 1209 * Side Effects: 1210 * JobDoOutput is called. 1211 * 1212 *----------------------------------------------------------------------- 1213 */ 1214 /*ARGSUSED*/ 1215 static void 1216 JobLocalInput(stream, job) 1217 int stream; /* Stream that's ready (ignored) */ 1218 Job *job; /* Job to which the stream belongs */ 1219 { 1220 JobDoOutput(job, FALSE); 1221 } 1222 #endif /* RMT_WILL_WATCH */ 1223 1224 /*- 1225 *----------------------------------------------------------------------- 1226 * JobExec -- 1227 * Execute the shell for the given job. Called from JobStart and 1228 * JobRestart. 1229 * 1230 * Results: 1231 * None. 1232 * 1233 * Side Effects: 1234 * A shell is executed, outputs is altered and the Job structure added 1235 * to the job table. 1236 * 1237 *----------------------------------------------------------------------- 1238 */ 1239 static void 1240 JobExec(job, argv) 1241 Job *job; /* Job to execute */ 1242 char **argv; 1243 { 1244 int cpid; /* ID of new child */ 1245 1246 if (DEBUG(JOB)) { 1247 int i; 1248 1249 (void) fprintf(stdout, "Running %s %sly\n", job->node->name, 1250 job->flags&JOB_REMOTE?"remote":"local"); 1251 (void) fprintf(stdout, "\tCommand: "); 1252 for (i = 0; argv[i] != NULL; i++) { 1253 (void) fprintf(stdout, "%s ", argv[i]); 1254 } 1255 (void) fprintf(stdout, "\n"); 1256 (void) fflush(stdout); 1257 } 1258 1259 /* 1260 * Some jobs produce no output and it's disconcerting to have 1261 * no feedback of their running (since they produce no output, the 1262 * banner with their name in it never appears). This is an attempt to 1263 * provide that feedback, even if nothing follows it. 1264 */ 1265 if ((lastNode != job->node) && (job->flags & JOB_FIRST) && 1266 !(job->flags & JOB_SILENT)) { 1267 MESSAGE(stdout, job->node); 1268 lastNode = job->node; 1269 } 1270 1271 #ifdef RMT_NO_EXEC 1272 if (job->flags & JOB_REMOTE) { 1273 goto jobExecFinish; 1274 } 1275 #endif /* RMT_NO_EXEC */ 1276 1277 if ((cpid = vfork()) == -1) { 1278 Punt("Cannot vfork"); 1279 } else if (cpid == 0) { 1280 1281 /* 1282 * Must duplicate the input stream down to the child's input and 1283 * reset it to the beginning (again). Since the stream was marked 1284 * close-on-exec, we must clear that bit in the new input. 1285 */ 1286 if (dup2(FILENO(job->cmdFILE), 0) == -1) 1287 Punt("Cannot dup2: %s", strerror(errno)); 1288 (void) fcntl(0, F_SETFD, 0); 1289 (void) lseek(0, (off_t)0, SEEK_SET); 1290 1291 if (job->node->type & OP_MAKE) { 1292 /* 1293 * Pass job token pipe to submakes. 1294 */ 1295 fcntl(job_pipe[0], F_SETFD, 0); 1296 fcntl(job_pipe[1], F_SETFD, 0); 1297 } 1298 1299 if (usePipes) { 1300 /* 1301 * Set up the child's output to be routed through the pipe 1302 * we've created for it. 1303 */ 1304 if (dup2(job->outPipe, 1) == -1) 1305 Punt("Cannot dup2: %s", strerror(errno)); 1306 } else { 1307 /* 1308 * We're capturing output in a file, so we duplicate the 1309 * descriptor to the temporary file into the standard 1310 * output. 1311 */ 1312 if (dup2(job->outFd, 1) == -1) 1313 Punt("Cannot dup2: %s", strerror(errno)); 1314 } 1315 /* 1316 * The output channels are marked close on exec. This bit was 1317 * duplicated by the dup2 (on some systems), so we have to clear 1318 * it before routing the shell's error output to the same place as 1319 * its standard output. 1320 */ 1321 (void) fcntl(1, F_SETFD, 0); 1322 if (dup2(1, 2) == -1) 1323 Punt("Cannot dup2: %s", strerror(errno)); 1324 1325 #ifdef USE_PGRP 1326 /* 1327 * We want to switch the child into a different process family so 1328 * we can kill it and all its descendants in one fell swoop, 1329 * by killing its process family, but not commit suicide. 1330 */ 1331 # if defined(SYSV) 1332 (void) setsid(); 1333 # else 1334 (void) setpgid(0, getpid()); 1335 # endif 1336 #endif /* USE_PGRP */ 1337 1338 #ifdef REMOTE 1339 if (job->flags & JOB_REMOTE) { 1340 Rmt_Exec(shellPath, argv, FALSE); 1341 } else 1342 #endif /* REMOTE */ 1343 (void) execv(shellPath, argv); 1344 1345 (void) write(2, "Could not execute shell\n", 1346 sizeof("Could not execute shell")); 1347 _exit(1); 1348 } else { 1349 #ifdef REMOTE 1350 sigset_t nmask, omask; 1351 sigemptyset(&nmask); 1352 sigaddset(&nmask, SIGCHLD); 1353 sigprocmask(SIG_BLOCK, &nmask, &omask); 1354 #endif 1355 job->pid = cpid; 1356 1357 Trace_Log(JOBSTART, job); 1358 1359 if (usePipes && (job->flags & JOB_FIRST)) { 1360 /* 1361 * The first time a job is run for a node, we set the current 1362 * position in the buffer to the beginning and mark another 1363 * stream to watch in the outputs mask 1364 */ 1365 job->curPos = 0; 1366 1367 #ifdef RMT_WILL_WATCH 1368 Rmt_Watch(job->inPipe, JobLocalInput, job); 1369 #else 1370 #ifdef USE_SELECT 1371 FD_SET(job->inPipe, &outputs); 1372 #else 1373 watchfd(job); 1374 #endif 1375 #endif /* RMT_WILL_WATCH */ 1376 } 1377 1378 if (job->flags & JOB_REMOTE) { 1379 #ifndef REMOTE 1380 job->rmtID = 0; 1381 #else 1382 job->rmtID = Rmt_LastID(job->pid); 1383 #endif /* REMOTE */ 1384 } else { 1385 nLocal += 1; 1386 /* 1387 * XXX: Used to not happen if REMOTE. Why? 1388 */ 1389 if (job->cmdFILE != NULL && job->cmdFILE != stdout) { 1390 (void) fclose(job->cmdFILE); 1391 job->cmdFILE = NULL; 1392 } 1393 } 1394 #ifdef REMOTE 1395 sigprocmask(SIG_SETMASK, &omask, NULL); 1396 #endif 1397 } 1398 1399 #ifdef RMT_NO_EXEC 1400 jobExecFinish: 1401 #endif 1402 /* 1403 * Now the job is actually running, add it to the table. 1404 */ 1405 nJobs += 1; 1406 (void) Lst_AtEnd(jobs, (ClientData)job); 1407 } 1408 1409 /*- 1410 *----------------------------------------------------------------------- 1411 * JobMakeArgv -- 1412 * Create the argv needed to execute the shell for a given job. 1413 * 1414 * 1415 * Results: 1416 * 1417 * Side Effects: 1418 * 1419 *----------------------------------------------------------------------- 1420 */ 1421 static void 1422 JobMakeArgv(job, argv) 1423 Job *job; 1424 char **argv; 1425 { 1426 int argc; 1427 static char args[10]; /* For merged arguments */ 1428 1429 argv[0] = shellName; 1430 argc = 1; 1431 1432 if ((commandShell->exit && (*commandShell->exit != '-')) || 1433 (commandShell->echo && (*commandShell->echo != '-'))) 1434 { 1435 /* 1436 * At least one of the flags doesn't have a minus before it, so 1437 * merge them together. Have to do this because the *(&(@*#*&#$# 1438 * Bourne shell thinks its second argument is a file to source. 1439 * Grrrr. Note the ten-character limitation on the combined arguments. 1440 */ 1441 (void)snprintf(args, sizeof(args), "-%s%s", 1442 ((job->flags & JOB_IGNERR) ? "" : 1443 (commandShell->exit ? commandShell->exit : "")), 1444 ((job->flags & JOB_SILENT) ? "" : 1445 (commandShell->echo ? commandShell->echo : ""))); 1446 1447 if (args[1]) { 1448 argv[argc] = args; 1449 argc++; 1450 } 1451 } else { 1452 if (!(job->flags & JOB_IGNERR) && commandShell->exit) { 1453 argv[argc] = commandShell->exit; 1454 argc++; 1455 } 1456 if (!(job->flags & JOB_SILENT) && commandShell->echo) { 1457 argv[argc] = commandShell->echo; 1458 argc++; 1459 } 1460 } 1461 argv[argc] = NULL; 1462 } 1463 1464 /*- 1465 *----------------------------------------------------------------------- 1466 * JobRestart -- 1467 * Restart a job that stopped for some reason. 1468 * 1469 * Results: 1470 * None. 1471 * 1472 *----------------------------------------------------------------------- 1473 */ 1474 static void 1475 JobRestart(job) 1476 Job *job; /* Job to restart */ 1477 { 1478 #ifdef REMOTE 1479 int host; 1480 #endif 1481 1482 if (job->flags & JOB_REMIGRATE) { 1483 if ( 1484 #ifdef REMOTE 1485 verboseRemigrates || 1486 #endif 1487 DEBUG(JOB)) { 1488 (void) fprintf(stdout, "*** remigrating %x(%s)\n", 1489 job->pid, job->node->name); 1490 (void) fflush(stdout); 1491 } 1492 1493 #ifdef REMOTE 1494 if (!Rmt_ReExport(job->pid, job->node, &host)) { 1495 if (verboseRemigrates || DEBUG(JOB)) { 1496 (void) fprintf(stdout, "*** couldn't migrate...\n"); 1497 (void) fflush(stdout); 1498 } 1499 #endif 1500 if (nLocal != maxLocal) { 1501 /* 1502 * Job cannot be remigrated, but there's room on the local 1503 * machine, so resume the job and note that another 1504 * local job has started. 1505 */ 1506 if ( 1507 #ifdef REMOTE 1508 verboseRemigrates || 1509 #endif 1510 DEBUG(JOB)) { 1511 (void) fprintf(stdout, "*** resuming on local machine\n"); 1512 (void) fflush(stdout); 1513 } 1514 KILL(job->pid, SIGCONT); 1515 nLocal +=1; 1516 #ifdef REMOTE 1517 job->flags &= ~(JOB_REMIGRATE|JOB_RESUME|JOB_REMOTE); 1518 job->flags |= JOB_CONTINUING; 1519 #else 1520 job->flags &= ~(JOB_REMIGRATE|JOB_RESUME); 1521 #endif 1522 } else { 1523 /* 1524 * Job cannot be restarted. Mark the table as full and 1525 * place the job back on the list of stopped jobs. 1526 */ 1527 if ( 1528 #ifdef REMOTE 1529 verboseRemigrates || 1530 #endif 1531 DEBUG(JOB)) { 1532 (void) fprintf(stdout, "*** holding\n"); 1533 (void) fflush(stdout); 1534 } 1535 (void)Lst_AtFront(stoppedJobs, (ClientData)job); 1536 return; 1537 } 1538 #ifdef REMOTE 1539 } else { 1540 /* 1541 * Clear out the remigrate and resume flags. Set the continuing 1542 * flag so we know later on that the process isn't exiting just 1543 * because of a signal. 1544 */ 1545 job->flags &= ~(JOB_REMIGRATE|JOB_RESUME); 1546 job->flags |= JOB_CONTINUING; 1547 job->rmtID = host; 1548 } 1549 #endif 1550 1551 (void)Lst_AtEnd(jobs, (ClientData)job); 1552 nJobs += 1; 1553 } else if (job->flags & JOB_RESTART) { 1554 /* 1555 * Set up the control arguments to the shell. This is based on the 1556 * flags set earlier for this job. If the JOB_IGNERR flag is clear, 1557 * the 'exit' flag of the commandShell is used to cause it to exit 1558 * upon receiving an error. If the JOB_SILENT flag is clear, the 1559 * 'echo' flag of the commandShell is used to get it to start echoing 1560 * as soon as it starts processing commands. 1561 */ 1562 char *argv[10]; 1563 1564 JobMakeArgv(job, argv); 1565 1566 if (DEBUG(JOB)) { 1567 (void) fprintf(stdout, "Restarting %s...", job->node->name); 1568 (void) fflush(stdout); 1569 } 1570 #ifdef REMOTE 1571 if ((job->node->type&OP_NOEXPORT) || 1572 (nLocal < maxLocal && runLocalFirst) 1573 # ifdef RMT_NO_EXEC 1574 || !Rmt_Export(shellPath, argv, job) 1575 # else 1576 || !Rmt_Begin(shellPath, argv, job->node) 1577 # endif 1578 #endif 1579 { 1580 if (((nLocal >= maxLocal) && !(job->flags & JOB_SPECIAL))) { 1581 /* 1582 * Can't be exported and not allowed to run locally -- put it 1583 * back on the hold queue and mark the table full 1584 */ 1585 if (DEBUG(JOB)) { 1586 (void) fprintf(stdout, "holding\n"); 1587 (void) fflush(stdout); 1588 } 1589 (void)Lst_AtFront(stoppedJobs, (ClientData)job); 1590 return; 1591 } else { 1592 /* 1593 * Job may be run locally. 1594 */ 1595 if (DEBUG(JOB)) { 1596 (void) fprintf(stdout, "running locally\n"); 1597 (void) fflush(stdout); 1598 } 1599 job->flags &= ~JOB_REMOTE; 1600 } 1601 } 1602 #ifdef REMOTE 1603 else { 1604 /* 1605 * Can be exported. Hooray! 1606 */ 1607 if (DEBUG(JOB)) { 1608 (void) fprintf(stdout, "exporting\n"); 1609 (void) fflush(stdout); 1610 } 1611 job->flags |= JOB_REMOTE; 1612 } 1613 #endif 1614 JobExec(job, argv); 1615 } else { 1616 /* 1617 * The job has stopped and needs to be restarted. Why it stopped, 1618 * we don't know... 1619 */ 1620 if (DEBUG(JOB)) { 1621 (void) fprintf(stdout, "Resuming %s...", job->node->name); 1622 (void) fflush(stdout); 1623 } 1624 if (((job->flags & JOB_REMOTE) || 1625 (nLocal < maxLocal) || 1626 #ifdef REMOTE 1627 (((job->flags & JOB_SPECIAL) && 1628 (job->node->type & OP_NOEXPORT)) && 1629 (maxLocal == 0))) && 1630 #else 1631 ((job->flags & JOB_SPECIAL) && 1632 (maxLocal == 0))) && 1633 #endif 1634 (nJobs != maxJobs)) 1635 { 1636 /* 1637 * If the job is remote, it's ok to resume it as long as the 1638 * maximum concurrency won't be exceeded. If it's local and 1639 * we haven't reached the local concurrency limit already (or the 1640 * job must be run locally and maxLocal is 0), it's also ok to 1641 * resume it. 1642 */ 1643 Boolean error; 1644 int status; 1645 1646 #ifdef RMT_WANTS_SIGNALS 1647 if (job->flags & JOB_REMOTE) { 1648 error = !Rmt_Signal(job, SIGCONT); 1649 } else 1650 #endif /* RMT_WANTS_SIGNALS */ 1651 error = (KILL(job->pid, SIGCONT) != 0); 1652 1653 if (!error) { 1654 /* 1655 * Make sure the user knows we've continued the beast and 1656 * actually put the thing in the job table. 1657 */ 1658 job->flags |= JOB_CONTINUING; 1659 status = W_STOPCODE(SIGCONT); 1660 JobFinish(job, &status); 1661 1662 job->flags &= ~(JOB_RESUME|JOB_CONTINUING); 1663 if (DEBUG(JOB)) { 1664 (void) fprintf(stdout, "done\n"); 1665 (void) fflush(stdout); 1666 } 1667 } else { 1668 Error("couldn't resume %s: %s", 1669 job->node->name, strerror(errno)); 1670 status = W_EXITCODE(1, 0); 1671 JobFinish(job, &status); 1672 } 1673 } else { 1674 /* 1675 * Job cannot be restarted. Mark the table as full and 1676 * place the job back on the list of stopped jobs. 1677 */ 1678 if (DEBUG(JOB)) { 1679 (void) fprintf(stdout, "table full\n"); 1680 (void) fflush(stdout); 1681 } 1682 (void) Lst_AtFront(stoppedJobs, (ClientData)job); 1683 } 1684 } 1685 } 1686 1687 /*- 1688 *----------------------------------------------------------------------- 1689 * JobStart -- 1690 * Start a target-creation process going for the target described 1691 * by the graph node gn. 1692 * 1693 * Results: 1694 * JOB_ERROR if there was an error in the commands, JOB_FINISHED 1695 * if there isn't actually anything left to do for the job and 1696 * JOB_RUNNING if the job has been started. 1697 * 1698 * Side Effects: 1699 * A new Job node is created and added to the list of running 1700 * jobs. PMake is forked and a child shell created. 1701 *----------------------------------------------------------------------- 1702 */ 1703 static int 1704 JobStart(gn, flags, previous) 1705 GNode *gn; /* target to create */ 1706 int flags; /* flags for the job to override normal ones. 1707 * e.g. JOB_SPECIAL or JOB_IGNDOTS */ 1708 Job *previous; /* The previous Job structure for this node, 1709 * if any. */ 1710 { 1711 register Job *job; /* new job descriptor */ 1712 char *argv[10]; /* Argument vector to shell */ 1713 Boolean cmdsOK; /* true if the nodes commands were all right */ 1714 Boolean local; /* Set true if the job was run locally */ 1715 Boolean noExec; /* Set true if we decide not to run the job */ 1716 int tfd; /* File descriptor to the temp file */ 1717 1718 if (previous != NULL) { 1719 previous->flags &= ~(JOB_FIRST|JOB_IGNERR|JOB_SILENT|JOB_REMOTE); 1720 job = previous; 1721 } else { 1722 job = (Job *) emalloc(sizeof(Job)); 1723 if (job == NULL) { 1724 Punt("JobStart out of memory"); 1725 } 1726 flags |= JOB_FIRST; 1727 } 1728 1729 job->node = gn; 1730 job->tailCmds = NILLNODE; 1731 1732 /* 1733 * Set the initial value of the flags for this job based on the global 1734 * ones and the node's attributes... Any flags supplied by the caller 1735 * are also added to the field. 1736 */ 1737 job->flags = 0; 1738 if (Targ_Ignore(gn)) { 1739 job->flags |= JOB_IGNERR; 1740 } 1741 if (Targ_Silent(gn)) { 1742 job->flags |= JOB_SILENT; 1743 } 1744 job->flags |= flags; 1745 1746 /* 1747 * Check the commands now so any attributes from .DEFAULT have a chance 1748 * to migrate to the node 1749 */ 1750 if (!compatMake && job->flags & JOB_FIRST) { 1751 cmdsOK = Job_CheckCommands(gn, Error); 1752 } else { 1753 cmdsOK = TRUE; 1754 } 1755 1756 #ifndef RMT_WILL_WATCH 1757 #ifndef USE_SELECT 1758 job->inPollfd = NULL; 1759 #endif 1760 #endif 1761 /* 1762 * If the -n flag wasn't given, we open up OUR (not the child's) 1763 * temporary file to stuff commands in it. The thing is rd/wr so we don't 1764 * need to reopen it to feed it to the shell. If the -n flag *was* given, 1765 * we just set the file to be stdout. Cute, huh? 1766 */ 1767 if ((gn->type & OP_MAKE) || (!noExecute && !touchFlag)) { 1768 /* 1769 * tfile is the name of a file into which all shell commands are 1770 * put. It is used over by removing it before the child shell is 1771 * executed. The XXXXXX in the string are replaced by the pid of 1772 * the make process in a 6-character field with leading zeroes. 1773 */ 1774 char tfile[sizeof(TMPPAT)]; 1775 /* 1776 * We're serious here, but if the commands were bogus, we're 1777 * also dead... 1778 */ 1779 if (!cmdsOK) { 1780 DieHorribly(); 1781 } 1782 1783 (void)strcpy(tfile, TMPPAT); 1784 if ((tfd = mkstemp(tfile)) == -1) 1785 Punt("Could not create temporary file %s", strerror(errno)); 1786 (void) eunlink(tfile); 1787 1788 job->cmdFILE = fdopen(tfd, "w+"); 1789 if (job->cmdFILE == NULL) { 1790 Punt("Could not fdopen %s", tfile); 1791 } 1792 (void) fcntl(FILENO(job->cmdFILE), F_SETFD, 1); 1793 /* 1794 * Send the commands to the command file, flush all its buffers then 1795 * rewind and remove the thing. 1796 */ 1797 noExec = FALSE; 1798 1799 /* 1800 * used to be backwards; replace when start doing multiple commands 1801 * per shell. 1802 */ 1803 if (compatMake) { 1804 /* 1805 * Be compatible: If this is the first time for this node, 1806 * verify its commands are ok and open the commands list for 1807 * sequential access by later invocations of JobStart. 1808 * Once that is done, we take the next command off the list 1809 * and print it to the command file. If the command was an 1810 * ellipsis, note that there's nothing more to execute. 1811 */ 1812 if ((job->flags&JOB_FIRST) && (Lst_Open(gn->commands) != SUCCESS)){ 1813 cmdsOK = FALSE; 1814 } else { 1815 LstNode ln = Lst_Next(gn->commands); 1816 1817 if ((ln == NILLNODE) || 1818 JobPrintCommand((ClientData) Lst_Datum(ln), 1819 (ClientData) job)) 1820 { 1821 noExec = TRUE; 1822 Lst_Close(gn->commands); 1823 } 1824 if (noExec && !(job->flags & JOB_FIRST)) { 1825 /* 1826 * If we're not going to execute anything, the job 1827 * is done and we need to close down the various 1828 * file descriptors we've opened for output, then 1829 * call JobDoOutput to catch the final characters or 1830 * send the file to the screen... Note that the i/o streams 1831 * are only open if this isn't the first job. 1832 * Note also that this could not be done in 1833 * Job_CatchChildren b/c it wasn't clear if there were 1834 * more commands to execute or not... 1835 */ 1836 JobClose(job); 1837 } 1838 } 1839 } else { 1840 /* 1841 * We can do all the commands at once. hooray for sanity 1842 */ 1843 numCommands = 0; 1844 Lst_ForEach(gn->commands, JobPrintCommand, (ClientData)job); 1845 1846 /* 1847 * If we didn't print out any commands to the shell script, 1848 * there's not much point in executing the shell, is there? 1849 */ 1850 if (numCommands == 0) { 1851 noExec = TRUE; 1852 } 1853 } 1854 } else if (noExecute) { 1855 /* 1856 * Not executing anything -- just print all the commands to stdout 1857 * in one fell swoop. This will still set up job->tailCmds correctly. 1858 */ 1859 if (lastNode != gn) { 1860 MESSAGE(stdout, gn); 1861 lastNode = gn; 1862 } 1863 job->cmdFILE = stdout; 1864 /* 1865 * Only print the commands if they're ok, but don't die if they're 1866 * not -- just let the user know they're bad and keep going. It 1867 * doesn't do any harm in this case and may do some good. 1868 */ 1869 if (cmdsOK) { 1870 Lst_ForEach(gn->commands, JobPrintCommand, (ClientData)job); 1871 } 1872 /* 1873 * Don't execute the shell, thank you. 1874 */ 1875 noExec = TRUE; 1876 } else { 1877 /* 1878 * Just touch the target and note that no shell should be executed. 1879 * Set cmdFILE to stdout to make life easier. Check the commands, too, 1880 * but don't die if they're no good -- it does no harm to keep working 1881 * up the graph. 1882 */ 1883 job->cmdFILE = stdout; 1884 Job_Touch(gn, job->flags&JOB_SILENT); 1885 noExec = TRUE; 1886 } 1887 1888 /* 1889 * If we're not supposed to execute a shell, don't. 1890 */ 1891 if (noExec) { 1892 /* 1893 * Unlink and close the command file if we opened one 1894 */ 1895 if (job->cmdFILE != stdout) { 1896 if (job->cmdFILE != NULL) { 1897 (void) fclose(job->cmdFILE); 1898 job->cmdFILE = NULL; 1899 } 1900 } else { 1901 (void) fflush(stdout); 1902 } 1903 1904 /* 1905 * We only want to work our way up the graph if we aren't here because 1906 * the commands for the job were no good. 1907 */ 1908 if (cmdsOK) { 1909 if (aborting == 0) { 1910 if (job->tailCmds != NILLNODE) { 1911 Lst_ForEachFrom(job->node->commands, job->tailCmds, 1912 JobSaveCommand, 1913 (ClientData)job->node); 1914 } 1915 Make_Update(job->node); 1916 } 1917 free((Address)job); 1918 return(JOB_FINISHED); 1919 } else { 1920 free((Address)job); 1921 return(JOB_ERROR); 1922 } 1923 } else { 1924 (void) fflush(job->cmdFILE); 1925 } 1926 1927 /* 1928 * Set up the control arguments to the shell. This is based on the flags 1929 * set earlier for this job. 1930 */ 1931 JobMakeArgv(job, argv); 1932 1933 /* 1934 * If we're using pipes to catch output, create the pipe by which we'll 1935 * get the shell's output. If we're using files, print out that we're 1936 * starting a job and then set up its temporary-file name. 1937 */ 1938 if (!compatMake || (job->flags & JOB_FIRST)) { 1939 if (usePipes) { 1940 int fd[2]; 1941 if (pipe(fd) == -1) 1942 Punt("Cannot create pipe: %s", strerror(errno)); 1943 job->inPipe = fd[0]; 1944 #ifdef USE_SELECT 1945 if (job->inPipe >= FD_SETSIZE) 1946 Punt("Ran out of fd_set slots; " 1947 "recompile with a larger FD_SETSIZE."); 1948 #endif 1949 job->outPipe = fd[1]; 1950 (void) fcntl(job->inPipe, F_SETFD, 1); 1951 (void) fcntl(job->outPipe, F_SETFD, 1); 1952 } else { 1953 (void) fprintf(stdout, "Remaking `%s'\n", gn->name); 1954 (void) fflush(stdout); 1955 (void) strcpy(job->outFile, TMPPAT); 1956 job->outFd = mkstemp(job->outFile); 1957 (void) fcntl(job->outFd, F_SETFD, 1); 1958 } 1959 } 1960 1961 #ifdef REMOTE 1962 if (!(gn->type & OP_NOEXPORT) && !(runLocalFirst && nLocal < maxLocal)) { 1963 #ifdef RMT_NO_EXEC 1964 local = !Rmt_Export(shellPath, argv, job); 1965 #else 1966 local = !Rmt_Begin(shellPath, argv, job->node); 1967 #endif /* RMT_NO_EXEC */ 1968 if (!local) { 1969 job->flags |= JOB_REMOTE; 1970 } 1971 } else 1972 #endif 1973 local = TRUE; 1974 1975 if (local && (((nLocal >= maxLocal) && 1976 !(job->flags & JOB_SPECIAL) && 1977 #ifdef REMOTE 1978 (!(gn->type & OP_NOEXPORT) || (maxLocal != 0)) 1979 #else 1980 (maxLocal != 0) 1981 #endif 1982 ))) 1983 { 1984 /* 1985 * The job can only be run locally, but we've hit the limit of 1986 * local concurrency, so put the job on hold until some other job 1987 * finishes. Note that the special jobs (.BEGIN, .INTERRUPT and .END) 1988 * may be run locally even when the local limit has been reached 1989 * (e.g. when maxLocal == 0), though they will be exported if at 1990 * all possible. In addition, any target marked with .NOEXPORT will 1991 * be run locally if maxLocal is 0. 1992 */ 1993 job->flags |= JOB_RESTART; 1994 (void) Lst_AtEnd(stoppedJobs, (ClientData)job); 1995 } else { 1996 JobExec(job, argv); 1997 } 1998 return(JOB_RUNNING); 1999 } 2000 2001 static char * 2002 JobOutput(job, cp, endp, msg) 2003 register Job *job; 2004 register char *cp, *endp; 2005 int msg; 2006 { 2007 register char *ecp; 2008 2009 if (commandShell->noPrint) { 2010 ecp = Str_FindSubstring(cp, commandShell->noPrint); 2011 while (ecp != NULL) { 2012 if (cp != ecp) { 2013 *ecp = '\0'; 2014 if (msg && job->node != lastNode) { 2015 MESSAGE(stdout, job->node); 2016 lastNode = job->node; 2017 } 2018 /* 2019 * The only way there wouldn't be a newline after 2020 * this line is if it were the last in the buffer. 2021 * however, since the non-printable comes after it, 2022 * there must be a newline, so we don't print one. 2023 */ 2024 (void) fprintf(stdout, "%s", cp); 2025 (void) fflush(stdout); 2026 } 2027 cp = ecp + commandShell->noPLen; 2028 if (cp != endp) { 2029 /* 2030 * Still more to print, look again after skipping 2031 * the whitespace following the non-printable 2032 * command.... 2033 */ 2034 cp++; 2035 while (*cp == ' ' || *cp == '\t' || *cp == '\n') { 2036 cp++; 2037 } 2038 ecp = Str_FindSubstring(cp, commandShell->noPrint); 2039 } else { 2040 return cp; 2041 } 2042 } 2043 } 2044 return cp; 2045 } 2046 2047 /*- 2048 *----------------------------------------------------------------------- 2049 * JobDoOutput -- 2050 * This function is called at different times depending on 2051 * whether the user has specified that output is to be collected 2052 * via pipes or temporary files. In the former case, we are called 2053 * whenever there is something to read on the pipe. We collect more 2054 * output from the given job and store it in the job's outBuf. If 2055 * this makes up a line, we print it tagged by the job's identifier, 2056 * as necessary. 2057 * If output has been collected in a temporary file, we open the 2058 * file and read it line by line, transfering it to our own 2059 * output channel until the file is empty. At which point we 2060 * remove the temporary file. 2061 * In both cases, however, we keep our figurative eye out for the 2062 * 'noPrint' line for the shell from which the output came. If 2063 * we recognize a line, we don't print it. If the command is not 2064 * alone on the line (the character after it is not \0 or \n), we 2065 * do print whatever follows it. 2066 * 2067 * Results: 2068 * None 2069 * 2070 * Side Effects: 2071 * curPos may be shifted as may the contents of outBuf. 2072 *----------------------------------------------------------------------- 2073 */ 2074 STATIC void 2075 JobDoOutput(job, finish) 2076 register Job *job; /* the job whose output needs printing */ 2077 Boolean finish; /* TRUE if this is the last time we'll be 2078 * called for this job */ 2079 { 2080 Boolean gotNL = FALSE; /* true if got a newline */ 2081 Boolean fbuf; /* true if our buffer filled up */ 2082 register int nr; /* number of bytes read */ 2083 register int i; /* auxiliary index into outBuf */ 2084 register int max; /* limit for i (end of current data) */ 2085 int nRead; /* (Temporary) number of bytes read */ 2086 2087 FILE *oFILE; /* Stream pointer to shell's output file */ 2088 char inLine[132]; 2089 2090 2091 if (usePipes) { 2092 /* 2093 * Read as many bytes as will fit in the buffer. 2094 */ 2095 end_loop: 2096 gotNL = FALSE; 2097 fbuf = FALSE; 2098 2099 nRead = read(job->inPipe, &job->outBuf[job->curPos], 2100 JOB_BUFSIZE - job->curPos); 2101 if (nRead < 0) { 2102 if (DEBUG(JOB)) { 2103 perror("JobDoOutput(piperead)"); 2104 } 2105 nr = 0; 2106 } else { 2107 nr = nRead; 2108 } 2109 2110 /* 2111 * If we hit the end-of-file (the job is dead), we must flush its 2112 * remaining output, so pretend we read a newline if there's any 2113 * output remaining in the buffer. 2114 * Also clear the 'finish' flag so we stop looping. 2115 */ 2116 if ((nr == 0) && (job->curPos != 0)) { 2117 job->outBuf[job->curPos] = '\n'; 2118 nr = 1; 2119 finish = FALSE; 2120 } else if (nr == 0) { 2121 finish = FALSE; 2122 } 2123 2124 /* 2125 * Look for the last newline in the bytes we just got. If there is 2126 * one, break out of the loop with 'i' as its index and gotNL set 2127 * TRUE. 2128 */ 2129 max = job->curPos + nr; 2130 for (i = job->curPos + nr - 1; i >= job->curPos; i--) { 2131 if (job->outBuf[i] == '\n') { 2132 gotNL = TRUE; 2133 break; 2134 } else if (job->outBuf[i] == '\0') { 2135 /* 2136 * Why? 2137 */ 2138 job->outBuf[i] = ' '; 2139 } 2140 } 2141 2142 if (!gotNL) { 2143 job->curPos += nr; 2144 if (job->curPos == JOB_BUFSIZE) { 2145 /* 2146 * If we've run out of buffer space, we have no choice 2147 * but to print the stuff. sigh. 2148 */ 2149 fbuf = TRUE; 2150 i = job->curPos; 2151 } 2152 } 2153 if (gotNL || fbuf) { 2154 /* 2155 * Need to send the output to the screen. Null terminate it 2156 * first, overwriting the newline character if there was one. 2157 * So long as the line isn't one we should filter (according 2158 * to the shell description), we print the line, preceeded 2159 * by a target banner if this target isn't the same as the 2160 * one for which we last printed something. 2161 * The rest of the data in the buffer are then shifted down 2162 * to the start of the buffer and curPos is set accordingly. 2163 */ 2164 job->outBuf[i] = '\0'; 2165 if (i >= job->curPos) { 2166 char *cp; 2167 2168 cp = JobOutput(job, job->outBuf, &job->outBuf[i], FALSE); 2169 2170 /* 2171 * There's still more in that thar buffer. This time, though, 2172 * we know there's no newline at the end, so we add one of 2173 * our own free will. 2174 */ 2175 if (*cp != '\0') { 2176 if (job->node != lastNode) { 2177 MESSAGE(stdout, job->node); 2178 lastNode = job->node; 2179 } 2180 (void) fprintf(stdout, "%s%s", cp, gotNL ? "\n" : ""); 2181 (void) fflush(stdout); 2182 } 2183 } 2184 if (i < max - 1) { 2185 /* shift the remaining characters down */ 2186 (void) memcpy(job->outBuf, &job->outBuf[i + 1], max - (i + 1)); 2187 job->curPos = max - (i + 1); 2188 2189 } else { 2190 /* 2191 * We have written everything out, so we just start over 2192 * from the start of the buffer. No copying. No nothing. 2193 */ 2194 job->curPos = 0; 2195 } 2196 } 2197 if (finish) { 2198 /* 2199 * If the finish flag is true, we must loop until we hit 2200 * end-of-file on the pipe. This is guaranteed to happen 2201 * eventually since the other end of the pipe is now closed 2202 * (we closed it explicitly and the child has exited). When 2203 * we do get an EOF, finish will be set FALSE and we'll fall 2204 * through and out. 2205 */ 2206 goto end_loop; 2207 } 2208 } else { 2209 /* 2210 * We've been called to retrieve the output of the job from the 2211 * temporary file where it's been squirreled away. This consists of 2212 * opening the file, reading the output line by line, being sure not 2213 * to print the noPrint line for the shell we used, then close and 2214 * remove the temporary file. Very simple. 2215 * 2216 * Change to read in blocks and do FindSubString type things as for 2217 * pipes? That would allow for "@echo -n..." 2218 */ 2219 oFILE = fopen(job->outFile, "r"); 2220 if (oFILE != NULL) { 2221 (void) fprintf(stdout, "Results of making %s:\n", job->node->name); 2222 (void) fflush(stdout); 2223 while (fgets(inLine, sizeof(inLine), oFILE) != NULL) { 2224 register char *cp, *endp, *oendp; 2225 2226 cp = inLine; 2227 oendp = endp = inLine + strlen(inLine); 2228 if (endp[-1] == '\n') { 2229 *--endp = '\0'; 2230 } 2231 cp = JobOutput(job, inLine, endp, FALSE); 2232 2233 /* 2234 * There's still more in that thar buffer. This time, though, 2235 * we know there's no newline at the end, so we add one of 2236 * our own free will. 2237 */ 2238 (void) fprintf(stdout, "%s", cp); 2239 (void) fflush(stdout); 2240 if (endp != oendp) { 2241 (void) fprintf(stdout, "\n"); 2242 (void) fflush(stdout); 2243 } 2244 } 2245 (void) fclose(oFILE); 2246 (void) eunlink(job->outFile); 2247 } else { 2248 Punt("Cannot open `%s'", job->outFile); 2249 } 2250 } 2251 } 2252 2253 /*- 2254 *----------------------------------------------------------------------- 2255 * Job_CatchChildren -- 2256 * Handle the exit of a child. Called from Make_Make. 2257 * 2258 * Results: 2259 * none. 2260 * 2261 * Side Effects: 2262 * The job descriptor is removed from the list of children. 2263 * 2264 * Notes: 2265 * We do waits, blocking or not, according to the wisdom of our 2266 * caller, until there are no more children to report. For each 2267 * job, call JobFinish to finish things off. This will take care of 2268 * putting jobs on the stoppedJobs queue. 2269 * 2270 *----------------------------------------------------------------------- 2271 */ 2272 void 2273 Job_CatchChildren(block) 2274 Boolean block; /* TRUE if should block on the wait. */ 2275 { 2276 int pid; /* pid of dead child */ 2277 register Job *job; /* job descriptor for dead child */ 2278 LstNode jnode; /* list element for finding job */ 2279 int status; /* Exit/termination status */ 2280 2281 /* 2282 * Don't even bother if we know there's no one around. 2283 */ 2284 if (nLocal == 0) { 2285 return; 2286 } 2287 2288 while ((pid = waitpid((pid_t) -1, &status, 2289 (block?0:WNOHANG)|WUNTRACED)) > 0) 2290 { 2291 if (DEBUG(JOB)) { 2292 (void) fprintf(stdout, "Process %d exited or stopped %x.\n", pid, 2293 status); 2294 (void) fflush(stdout); 2295 } 2296 2297 2298 jnode = Lst_Find(jobs, (ClientData)&pid, JobCmpPid); 2299 2300 if (jnode == NILLNODE) { 2301 if (WIFSTOPPED(status) && (WSTOPSIG(status) == SIGCONT)) { 2302 jnode = Lst_Find(stoppedJobs, (ClientData) &pid, JobCmpPid); 2303 if (jnode == NILLNODE) { 2304 Error("Resumed child (%d) not in table", pid); 2305 continue; 2306 } 2307 job = (Job *)Lst_Datum(jnode); 2308 (void) Lst_Remove(stoppedJobs, jnode); 2309 } else { 2310 Error("Child (%d) not in table?", pid); 2311 continue; 2312 } 2313 } else { 2314 job = (Job *) Lst_Datum(jnode); 2315 (void) Lst_Remove(jobs, jnode); 2316 nJobs -= 1; 2317 #ifdef REMOTE 2318 if (!(job->flags & JOB_REMOTE)) { 2319 if (DEBUG(JOB)) { 2320 (void) fprintf(stdout, 2321 "Job queue has one fewer local process.\n"); 2322 (void) fflush(stdout); 2323 } 2324 nLocal -= 1; 2325 } 2326 #else 2327 nLocal -= 1; 2328 #endif 2329 } 2330 2331 JobFinish(job, &status); 2332 } 2333 } 2334 2335 /*- 2336 *----------------------------------------------------------------------- 2337 * Job_CatchOutput -- 2338 * Catch the output from our children, if we're using 2339 * pipes do so. Otherwise just block time until we get a 2340 * signal (most likely a SIGCHLD) since there's no point in 2341 * just spinning when there's nothing to do and the reaping 2342 * of a child can wait for a while. 2343 * 2344 * Results: 2345 * None 2346 * 2347 * Side Effects: 2348 * Output is read from pipes if we're piping. 2349 * ----------------------------------------------------------------------- 2350 */ 2351 void 2352 Job_CatchOutput() 2353 { 2354 int nready; 2355 register LstNode ln; 2356 register Job *job; 2357 #ifdef RMT_WILL_WATCH 2358 int pnJobs; /* Previous nJobs */ 2359 #endif 2360 2361 (void) fflush(stdout); 2362 Job_TokenRelease(); 2363 #ifdef RMT_WILL_WATCH 2364 pnJobs = nJobs; 2365 2366 /* 2367 * It is possible for us to be called with nJobs equal to 0. This happens 2368 * if all the jobs finish and a job that is stopped cannot be run 2369 * locally (eg if maxLocal is 0) and cannot be exported. The job will 2370 * be placed back on the stoppedJobs queue, Job_Empty() will return false, 2371 * Make_Run will call us again when there's nothing for which to wait. 2372 * nJobs never changes, so we loop forever. Hence the check. It could 2373 * be argued that we should sleep for a bit so as not to swamp the 2374 * exportation system with requests. Perhaps we should. 2375 * 2376 * NOTE: IT IS THE RESPONSIBILITY OF Rmt_Wait TO CALL Job_CatchChildren 2377 * IN A TIMELY FASHION TO CATCH ANY LOCALLY RUNNING JOBS THAT EXIT. 2378 * It may use the variable nLocal to determine if it needs to call 2379 * Job_CatchChildren (if nLocal is 0, there's nothing for which to 2380 * wait...) 2381 */ 2382 while (nJobs != 0 && pnJobs == nJobs) { 2383 Rmt_Wait(); 2384 } 2385 #else 2386 if (usePipes) { 2387 #ifdef USE_SELECT 2388 struct timeval timeout; 2389 fd_set readfds; 2390 2391 readfds = outputs; 2392 timeout.tv_sec = SEL_SEC; 2393 timeout.tv_usec = SEL_USEC; 2394 2395 if ((nready = select(FD_SETSIZE, &readfds, (fd_set *) 0, 2396 (fd_set *) 0, &timeout)) <= 0) 2397 return; 2398 #else 2399 if ((nready = poll((wantToken ? fds : (fds + 1)), 2400 (wantToken ? nfds : (nfds - 1)), POLL_MSEC)) <= 0) 2401 return; 2402 #endif 2403 else { 2404 if (Lst_Open(jobs) == FAILURE) { 2405 Punt("Cannot open job table"); 2406 } 2407 while (nready && (ln = Lst_Next(jobs)) != NILLNODE) { 2408 job = (Job *) Lst_Datum(ln); 2409 #ifdef USE_SELECT 2410 if (FD_ISSET(job->inPipe, &readfds)) 2411 #else 2412 if (readyfd(job)) 2413 #endif 2414 { 2415 JobDoOutput(job, FALSE); 2416 nready -= 1; 2417 } 2418 2419 } 2420 Lst_Close(jobs); 2421 } 2422 } 2423 #endif /* RMT_WILL_WATCH */ 2424 } 2425 2426 /*- 2427 *----------------------------------------------------------------------- 2428 * Job_Make -- 2429 * Start the creation of a target. Basically a front-end for 2430 * JobStart used by the Make module. 2431 * 2432 * Results: 2433 * None. 2434 * 2435 * Side Effects: 2436 * Another job is started. 2437 * 2438 *----------------------------------------------------------------------- 2439 */ 2440 void 2441 Job_Make(gn) 2442 GNode *gn; 2443 { 2444 (void) JobStart(gn, 0, NULL); 2445 } 2446 2447 /*- 2448 *----------------------------------------------------------------------- 2449 * Job_Init -- 2450 * Initialize the process module 2451 * 2452 * Results: 2453 * none 2454 * 2455 * Side Effects: 2456 * lists and counters are initialized 2457 *----------------------------------------------------------------------- 2458 */ 2459 void 2460 Job_Init(maxproc, maxlocal) 2461 int maxproc; /* the greatest number of jobs which may be 2462 * running at one time */ 2463 int maxlocal; /* the greatest number of local jobs which may 2464 * be running at once. */ 2465 { 2466 GNode *begin; /* node for commands to do at the very start */ 2467 2468 jobs = Lst_Init(FALSE); 2469 stoppedJobs = Lst_Init(FALSE); 2470 maxJobs = maxproc; 2471 maxLocal = maxlocal; 2472 nJobs = 0; 2473 nLocal = 0; 2474 wantToken = FALSE; 2475 2476 aborting = 0; 2477 errors = 0; 2478 2479 lastNode = NILGNODE; 2480 2481 if (maxJobs == 1 2482 #ifdef REMOTE 2483 || noMessages 2484 #endif 2485 ) { 2486 /* 2487 * If only one job can run at a time, there's no need for a banner, 2488 * is there? 2489 */ 2490 targFmt = ""; 2491 } else { 2492 targFmt = TARG_FMT; 2493 } 2494 2495 if (shellPath == NULL) { 2496 /* 2497 * The user didn't specify a shell to use, so we are using the 2498 * default one... Both the absolute path and the last component 2499 * must be set. The last component is taken from the 'name' field 2500 * of the default shell description pointed-to by commandShell. 2501 * All default shells are located in _PATH_DEFSHELLDIR. 2502 */ 2503 shellName = commandShell->name; 2504 shellPath = str_concat(_PATH_DEFSHELLDIR, shellName, STR_ADDSLASH); 2505 } 2506 2507 if (commandShell->exit == NULL) { 2508 commandShell->exit = ""; 2509 } 2510 if (commandShell->echo == NULL) { 2511 commandShell->echo = ""; 2512 } 2513 2514 /* 2515 * Catch the four signals that POSIX specifies if they aren't ignored. 2516 * JobPassSig will take care of calling JobInterrupt if appropriate. 2517 */ 2518 if (signal(SIGINT, SIG_IGN) != SIG_IGN) { 2519 (void) signal(SIGINT, JobPassSig); 2520 } 2521 if (signal(SIGHUP, SIG_IGN) != SIG_IGN) { 2522 (void) signal(SIGHUP, JobPassSig); 2523 } 2524 if (signal(SIGQUIT, SIG_IGN) != SIG_IGN) { 2525 (void) signal(SIGQUIT, JobPassSig); 2526 } 2527 if (signal(SIGTERM, SIG_IGN) != SIG_IGN) { 2528 (void) signal(SIGTERM, JobPassSig); 2529 } 2530 /* 2531 * Install a NOOP SIGCHLD handler so we are woken up if we're blocked. 2532 */ 2533 signal(SIGCHLD, JobIgnoreSig); 2534 2535 /* 2536 * There are additional signals that need to be caught and passed if 2537 * either the export system wants to be told directly of signals or if 2538 * we're giving each job its own process group (since then it won't get 2539 * signals from the terminal driver as we own the terminal) 2540 */ 2541 #if defined(RMT_WANTS_SIGNALS) || defined(USE_PGRP) 2542 if (signal(SIGTSTP, SIG_IGN) != SIG_IGN) { 2543 (void) signal(SIGTSTP, JobPassSig); 2544 } 2545 if (signal(SIGTTOU, SIG_IGN) != SIG_IGN) { 2546 (void) signal(SIGTTOU, JobPassSig); 2547 } 2548 if (signal(SIGTTIN, SIG_IGN) != SIG_IGN) { 2549 (void) signal(SIGTTIN, JobPassSig); 2550 } 2551 if (signal(SIGWINCH, SIG_IGN) != SIG_IGN) { 2552 (void) signal(SIGWINCH, JobPassSig); 2553 } 2554 #endif 2555 2556 begin = Targ_FindNode(".BEGIN", TARG_NOCREATE); 2557 2558 if (begin != NILGNODE) { 2559 JobStart(begin, JOB_SPECIAL, (Job *)0); 2560 while (nJobs) { 2561 Job_CatchOutput(); 2562 #ifndef RMT_WILL_WATCH 2563 Job_CatchChildren(!usePipes); 2564 #endif /* RMT_WILL_WATCH */ 2565 } 2566 } 2567 postCommands = Targ_FindNode(".END", TARG_CREATE); 2568 } 2569 2570 /*- 2571 *----------------------------------------------------------------------- 2572 * Job_Empty -- 2573 * See if the job table is empty. Because the local concurrency may 2574 * be set to 0, it is possible for the job table to become empty, 2575 * while the list of stoppedJobs remains non-empty. In such a case, 2576 * we want to restart as many jobs as we can. 2577 * 2578 * Results: 2579 * TRUE if it is. FALSE if it ain't. 2580 * 2581 * Side Effects: 2582 * None. 2583 * 2584 * ----------------------------------------------------------------------- 2585 */ 2586 Boolean 2587 Job_Empty() 2588 { 2589 if (nJobs == 0) { 2590 if (!Lst_IsEmpty(stoppedJobs) && !aborting) { 2591 /* 2592 * The job table is obviously not full if it has no jobs in 2593 * it...Try and restart the stopped jobs. 2594 */ 2595 JobRestartJobs(); 2596 return(FALSE); 2597 } else { 2598 return(TRUE); 2599 } 2600 } else { 2601 return(FALSE); 2602 } 2603 } 2604 2605 /*- 2606 *----------------------------------------------------------------------- 2607 * JobMatchShell -- 2608 * Find a matching shell in 'shells' given its final component. 2609 * 2610 * Results: 2611 * A pointer to the Shell structure. 2612 * 2613 * Side Effects: 2614 * None. 2615 * 2616 *----------------------------------------------------------------------- 2617 */ 2618 static Shell * 2619 JobMatchShell(name) 2620 char *name; /* Final component of shell path */ 2621 { 2622 register Shell *sh; /* Pointer into shells table */ 2623 Shell *match; /* Longest-matching shell */ 2624 register char *cp1, 2625 *cp2; 2626 char *eoname; 2627 2628 eoname = name + strlen(name); 2629 2630 match = NULL; 2631 2632 for (sh = shells; sh->name != NULL; sh++) { 2633 for (cp1 = eoname - strlen(sh->name), cp2 = sh->name; 2634 *cp1 != '\0' && *cp1 == *cp2; 2635 cp1++, cp2++) { 2636 continue; 2637 } 2638 if (*cp1 != *cp2) { 2639 continue; 2640 } else if (match == NULL || strlen(match->name) < strlen(sh->name)) { 2641 match = sh; 2642 } 2643 } 2644 return(match == NULL ? sh : match); 2645 } 2646 2647 /*- 2648 *----------------------------------------------------------------------- 2649 * Job_ParseShell -- 2650 * Parse a shell specification and set up commandShell, shellPath 2651 * and shellName appropriately. 2652 * 2653 * Results: 2654 * FAILURE if the specification was incorrect. 2655 * 2656 * Side Effects: 2657 * commandShell points to a Shell structure (either predefined or 2658 * created from the shell spec), shellPath is the full path of the 2659 * shell described by commandShell, while shellName is just the 2660 * final component of shellPath. 2661 * 2662 * Notes: 2663 * A shell specification consists of a .SHELL target, with dependency 2664 * operator, followed by a series of blank-separated words. Double 2665 * quotes can be used to use blanks in words. A backslash escapes 2666 * anything (most notably a double-quote and a space) and 2667 * provides the functionality it does in C. Each word consists of 2668 * keyword and value separated by an equal sign. There should be no 2669 * unnecessary spaces in the word. The keywords are as follows: 2670 * name Name of shell. 2671 * path Location of shell. Overrides "name" if given 2672 * quiet Command to turn off echoing. 2673 * echo Command to turn echoing on 2674 * filter Result of turning off echoing that shouldn't be 2675 * printed. 2676 * echoFlag Flag to turn echoing on at the start 2677 * errFlag Flag to turn error checking on at the start 2678 * hasErrCtl True if shell has error checking control 2679 * check Command to turn on error checking if hasErrCtl 2680 * is TRUE or template of command to echo a command 2681 * for which error checking is off if hasErrCtl is 2682 * FALSE. 2683 * ignore Command to turn off error checking if hasErrCtl 2684 * is TRUE or template of command to execute a 2685 * command so as to ignore any errors it returns if 2686 * hasErrCtl is FALSE. 2687 * 2688 *----------------------------------------------------------------------- 2689 */ 2690 ReturnStatus 2691 Job_ParseShell(line) 2692 char *line; /* The shell spec */ 2693 { 2694 char **words; 2695 int wordCount; 2696 register char **argv; 2697 register int argc; 2698 char *path; 2699 Shell newShell; 2700 Boolean fullSpec = FALSE; 2701 2702 while (isspace((unsigned char)*line)) { 2703 line++; 2704 } 2705 2706 if (shellArgv) 2707 free(shellArgv); 2708 2709 words = brk_string(line, &wordCount, TRUE, &shellArgv); 2710 2711 memset((Address)&newShell, 0, sizeof(newShell)); 2712 2713 /* 2714 * Parse the specification by keyword 2715 */ 2716 for (path = NULL, argc = wordCount - 1, argv = words; 2717 argc != 0; 2718 argc--, argv++) { 2719 if (strncmp(*argv, "path=", 5) == 0) { 2720 path = &argv[0][5]; 2721 } else if (strncmp(*argv, "name=", 5) == 0) { 2722 newShell.name = &argv[0][5]; 2723 } else { 2724 if (strncmp(*argv, "quiet=", 6) == 0) { 2725 newShell.echoOff = &argv[0][6]; 2726 } else if (strncmp(*argv, "echo=", 5) == 0) { 2727 newShell.echoOn = &argv[0][5]; 2728 } else if (strncmp(*argv, "filter=", 7) == 0) { 2729 newShell.noPrint = &argv[0][7]; 2730 newShell.noPLen = strlen(newShell.noPrint); 2731 } else if (strncmp(*argv, "echoFlag=", 9) == 0) { 2732 newShell.echo = &argv[0][9]; 2733 } else if (strncmp(*argv, "errFlag=", 8) == 0) { 2734 newShell.exit = &argv[0][8]; 2735 } else if (strncmp(*argv, "hasErrCtl=", 10) == 0) { 2736 char c = argv[0][10]; 2737 newShell.hasErrCtl = !((c != 'Y') && (c != 'y') && 2738 (c != 'T') && (c != 't')); 2739 } else if (strncmp(*argv, "check=", 6) == 0) { 2740 newShell.errCheck = &argv[0][6]; 2741 } else if (strncmp(*argv, "ignore=", 7) == 0) { 2742 newShell.ignErr = &argv[0][7]; 2743 } else { 2744 Parse_Error(PARSE_FATAL, "Unknown keyword \"%s\"", 2745 *argv); 2746 free(words); 2747 return(FAILURE); 2748 } 2749 fullSpec = TRUE; 2750 } 2751 } 2752 2753 if (path == NULL) { 2754 /* 2755 * If no path was given, the user wants one of the pre-defined shells, 2756 * yes? So we find the one s/he wants with the help of JobMatchShell 2757 * and set things up the right way. shellPath will be set up by 2758 * Job_Init. 2759 */ 2760 if (newShell.name == NULL) { 2761 Parse_Error(PARSE_FATAL, "Neither path nor name specified"); 2762 return(FAILURE); 2763 } else { 2764 commandShell = JobMatchShell(newShell.name); 2765 shellName = newShell.name; 2766 } 2767 } else { 2768 /* 2769 * The user provided a path. If s/he gave nothing else (fullSpec is 2770 * FALSE), try and find a matching shell in the ones we know of. 2771 * Else we just take the specification at its word and copy it 2772 * to a new location. In either case, we need to record the 2773 * path the user gave for the shell. 2774 */ 2775 shellPath = path; 2776 path = strrchr(path, '/'); 2777 if (path == NULL) { 2778 path = shellPath; 2779 } else { 2780 path += 1; 2781 } 2782 if (newShell.name != NULL) { 2783 shellName = newShell.name; 2784 } else { 2785 shellName = path; 2786 } 2787 if (!fullSpec) { 2788 commandShell = JobMatchShell(shellName); 2789 } else { 2790 commandShell = (Shell *) emalloc(sizeof(Shell)); 2791 *commandShell = newShell; 2792 } 2793 } 2794 2795 if (commandShell->echoOn && commandShell->echoOff) { 2796 commandShell->hasEchoCtl = TRUE; 2797 } 2798 2799 if (!commandShell->hasErrCtl) { 2800 if (commandShell->errCheck == NULL) { 2801 commandShell->errCheck = ""; 2802 } 2803 if (commandShell->ignErr == NULL) { 2804 commandShell->ignErr = "%s\n"; 2805 } 2806 } 2807 2808 /* 2809 * Do not free up the words themselves, since they might be in use by the 2810 * shell specification. 2811 */ 2812 free(words); 2813 return SUCCESS; 2814 } 2815 2816 /*- 2817 *----------------------------------------------------------------------- 2818 * JobInterrupt -- 2819 * Handle the receipt of an interrupt. 2820 * 2821 * Results: 2822 * None 2823 * 2824 * Side Effects: 2825 * All children are killed. Another job will be started if the 2826 * .INTERRUPT target was given. 2827 *----------------------------------------------------------------------- 2828 */ 2829 static void 2830 JobInterrupt(runINTERRUPT, signo) 2831 int runINTERRUPT; /* Non-zero if commands for the .INTERRUPT 2832 * target should be executed */ 2833 int signo; /* signal received */ 2834 { 2835 LstNode ln; /* element in job table */ 2836 Job *job; /* job descriptor in that element */ 2837 GNode *interrupt; /* the node describing the .INTERRUPT target */ 2838 2839 aborting = ABORT_INTERRUPT; 2840 2841 (void) Lst_Open(jobs); 2842 while ((ln = Lst_Next(jobs)) != NILLNODE) { 2843 job = (Job *) Lst_Datum(ln); 2844 2845 if (!Targ_Precious(job->node)) { 2846 char *file = (job->node->path == NULL ? 2847 job->node->name : 2848 job->node->path); 2849 if (!noExecute && eunlink(file) != -1) { 2850 Error("*** %s removed", file); 2851 } 2852 } 2853 #ifdef RMT_WANTS_SIGNALS 2854 if (job->flags & JOB_REMOTE) { 2855 /* 2856 * If job is remote, let the Rmt module do the killing. 2857 */ 2858 if (!Rmt_Signal(job, signo)) { 2859 /* 2860 * If couldn't kill the thing, finish it out now with an 2861 * error code, since no exit report will come in likely. 2862 */ 2863 int status; 2864 2865 status.w_status = 0; 2866 status.w_retcode = 1; 2867 JobFinish(job, &status); 2868 } 2869 } else if (job->pid) { 2870 KILL(job->pid, signo); 2871 } 2872 #else 2873 if (job->pid) { 2874 if (DEBUG(JOB)) { 2875 (void) fprintf(stdout, 2876 "JobInterrupt passing signal to child %d.\n", 2877 job->pid); 2878 (void) fflush(stdout); 2879 } 2880 KILL(job->pid, signo); 2881 } 2882 #endif /* RMT_WANTS_SIGNALS */ 2883 } 2884 2885 #ifdef REMOTE 2886 (void)Lst_Open(stoppedJobs); 2887 while ((ln = Lst_Next(stoppedJobs)) != NILLNODE) { 2888 job = (Job *) Lst_Datum(ln); 2889 2890 if (job->flags & JOB_RESTART) { 2891 if (DEBUG(JOB)) { 2892 (void) fprintf(stdout, "%s%s", 2893 "JobInterrupt skipping job on stopped queue", 2894 "-- it was waiting to be restarted.\n"); 2895 (void) fflush(stdout); 2896 } 2897 continue; 2898 } 2899 if (!Targ_Precious(job->node)) { 2900 char *file = (job->node->path == NULL ? 2901 job->node->name : 2902 job->node->path); 2903 if (eunlink(file) == 0) { 2904 Error("*** %s removed", file); 2905 } 2906 } 2907 /* 2908 * Resume the thing so it will take the signal. 2909 */ 2910 if (DEBUG(JOB)) { 2911 (void) fprintf(stdout, 2912 "JobInterrupt passing CONT to stopped child %d.\n", 2913 job->pid); 2914 (void) fflush(stdout); 2915 } 2916 KILL(job->pid, SIGCONT); 2917 #ifdef RMT_WANTS_SIGNALS 2918 if (job->flags & JOB_REMOTE) { 2919 /* 2920 * If job is remote, let the Rmt module do the killing. 2921 */ 2922 if (!Rmt_Signal(job, SIGINT)) { 2923 /* 2924 * If couldn't kill the thing, finish it out now with an 2925 * error code, since no exit report will come in likely. 2926 */ 2927 int status; 2928 status.w_status = 0; 2929 status.w_retcode = 1; 2930 JobFinish(job, &status); 2931 } 2932 } else if (job->pid) { 2933 if (DEBUG(JOB)) { 2934 (void) fprintf(stdout, 2935 "JobInterrupt passing interrupt to stopped child %d.\n", 2936 job->pid); 2937 (void) fflush(stdout); 2938 } 2939 KILL(job->pid, SIGINT); 2940 } 2941 #endif /* RMT_WANTS_SIGNALS */ 2942 } 2943 #endif 2944 Lst_Close(stoppedJobs); 2945 2946 if (runINTERRUPT && !touchFlag) { 2947 interrupt = Targ_FindNode(".INTERRUPT", TARG_NOCREATE); 2948 if (interrupt != NILGNODE) { 2949 ignoreErrors = FALSE; 2950 2951 JobStart(interrupt, JOB_IGNDOTS, (Job *)0); 2952 while (nJobs) { 2953 Job_CatchOutput(); 2954 #ifndef RMT_WILL_WATCH 2955 Job_CatchChildren(!usePipes); 2956 #endif /* RMT_WILL_WATCH */ 2957 } 2958 } 2959 } 2960 Trace_Log(MAKEINTR, 0); 2961 exit(signo); 2962 } 2963 2964 /* 2965 *----------------------------------------------------------------------- 2966 * Job_Finish -- 2967 * Do final processing such as the running of the commands 2968 * attached to the .END target. 2969 * 2970 * Results: 2971 * Number of errors reported. 2972 * 2973 * Side Effects: 2974 * None. 2975 *----------------------------------------------------------------------- 2976 */ 2977 int 2978 Job_Finish() 2979 { 2980 Job_TokenRelease(); 2981 if (postCommands != NILGNODE && !Lst_IsEmpty(postCommands->commands)) { 2982 if (errors) { 2983 Error("Errors reported so .END ignored"); 2984 } else { 2985 JobStart(postCommands, JOB_SPECIAL | JOB_IGNDOTS, NULL); 2986 2987 while (nJobs) { 2988 Job_CatchOutput(); 2989 #ifndef RMT_WILL_WATCH 2990 Job_CatchChildren(!usePipes); 2991 #endif /* RMT_WILL_WATCH */ 2992 } 2993 } 2994 } 2995 return(errors); 2996 } 2997 2998 /*- 2999 *----------------------------------------------------------------------- 3000 * Job_End -- 3001 * Cleanup any memory used by the jobs module 3002 * 3003 * Results: 3004 * None. 3005 * 3006 * Side Effects: 3007 * Memory is freed 3008 *----------------------------------------------------------------------- 3009 */ 3010 void 3011 Job_End() 3012 { 3013 #ifdef CLEANUP 3014 if (shellArgv) 3015 free(shellArgv); 3016 #endif 3017 } 3018 3019 /*- 3020 *----------------------------------------------------------------------- 3021 * Job_Wait -- 3022 * Waits for all running jobs to finish and returns. Sets 'aborting' 3023 * to ABORT_WAIT to prevent other jobs from starting. 3024 * 3025 * Results: 3026 * None. 3027 * 3028 * Side Effects: 3029 * Currently running jobs finish. 3030 * 3031 *----------------------------------------------------------------------- 3032 */ 3033 void 3034 Job_Wait() 3035 { 3036 aborting = ABORT_WAIT; 3037 while (nJobs != 0) { 3038 Job_CatchOutput(); 3039 #ifndef RMT_WILL_WATCH 3040 Job_CatchChildren(!usePipes); 3041 #endif /* RMT_WILL_WATCH */ 3042 } 3043 aborting = 0; 3044 } 3045 3046 /*- 3047 *----------------------------------------------------------------------- 3048 * Job_AbortAll -- 3049 * Abort all currently running jobs without handling output or anything. 3050 * This function is to be called only in the event of a major 3051 * error. Most definitely NOT to be called from JobInterrupt. 3052 * 3053 * Results: 3054 * None 3055 * 3056 * Side Effects: 3057 * All children are killed, not just the firstborn 3058 *----------------------------------------------------------------------- 3059 */ 3060 void 3061 Job_AbortAll() 3062 { 3063 LstNode ln; /* element in job table */ 3064 Job *job; /* the job descriptor in that element */ 3065 int foo; 3066 3067 aborting = ABORT_ERROR; 3068 3069 if (nJobs) { 3070 3071 (void) Lst_Open(jobs); 3072 while ((ln = Lst_Next(jobs)) != NILLNODE) { 3073 job = (Job *) Lst_Datum(ln); 3074 3075 /* 3076 * kill the child process with increasingly drastic signals to make 3077 * darn sure it's dead. 3078 */ 3079 #ifdef RMT_WANTS_SIGNALS 3080 if (job->flags & JOB_REMOTE) { 3081 Rmt_Signal(job, SIGINT); 3082 Rmt_Signal(job, SIGKILL); 3083 } else { 3084 KILL(job->pid, SIGINT); 3085 KILL(job->pid, SIGKILL); 3086 } 3087 #else 3088 KILL(job->pid, SIGINT); 3089 KILL(job->pid, SIGKILL); 3090 #endif /* RMT_WANTS_SIGNALS */ 3091 } 3092 } 3093 3094 /* 3095 * Catch as many children as want to report in at first, then give up 3096 */ 3097 while (waitpid((pid_t) -1, &foo, WNOHANG) > 0) 3098 continue; 3099 } 3100 3101 #ifdef REMOTE 3102 /*- 3103 *----------------------------------------------------------------------- 3104 * JobFlagForMigration -- 3105 * Handle the eviction of a child. Called from RmtStatusChange. 3106 * Flags the child as remigratable and then suspends it. 3107 * 3108 * Results: 3109 * none. 3110 * 3111 * Side Effects: 3112 * The job descriptor is flagged for remigration. 3113 * 3114 *----------------------------------------------------------------------- 3115 */ 3116 void 3117 JobFlagForMigration(hostID) 3118 int hostID; /* ID of host we used, for matching children. */ 3119 { 3120 register Job *job; /* job descriptor for dead child */ 3121 LstNode jnode; /* list element for finding job */ 3122 3123 if (DEBUG(JOB)) { 3124 (void) fprintf(stdout, "JobFlagForMigration(%d) called.\n", hostID); 3125 (void) fflush(stdout); 3126 } 3127 jnode = Lst_Find(jobs, (ClientData)hostID, JobCmpRmtID); 3128 3129 if (jnode == NILLNODE) { 3130 jnode = Lst_Find(stoppedJobs, (ClientData)hostID, JobCmpRmtID); 3131 if (jnode == NILLNODE) { 3132 if (DEBUG(JOB)) { 3133 Error("Evicting host(%d) not in table", hostID); 3134 } 3135 return; 3136 } 3137 } 3138 job = (Job *) Lst_Datum(jnode); 3139 3140 if (DEBUG(JOB)) { 3141 (void) fprintf(stdout, 3142 "JobFlagForMigration(%d) found job '%s'.\n", hostID, 3143 job->node->name); 3144 (void) fflush(stdout); 3145 } 3146 3147 KILL(job->pid, SIGSTOP); 3148 3149 job->flags |= JOB_REMIGRATE; 3150 } 3151 3152 #endif 3153 3154 /*- 3156 *----------------------------------------------------------------------- 3157 * JobRestartJobs -- 3158 * Tries to restart stopped jobs if there are slots available. 3159 * Note that this tries to restart them regardless of pending errors. 3160 * It's not good to leave stopped jobs lying around! 3161 * 3162 * Results: 3163 * None. 3164 * 3165 * Side Effects: 3166 * Resumes(and possibly migrates) jobs. 3167 * 3168 *----------------------------------------------------------------------- 3169 */ 3170 static void 3171 JobRestartJobs() 3172 { 3173 while (!Lst_IsEmpty(stoppedJobs)) { 3174 if (DEBUG(JOB)) { 3175 (void) fprintf(stdout, "Restarting a stopped job.\n"); 3176 (void) fflush(stdout); 3177 } 3178 JobRestart((Job *)Lst_DeQueue(stoppedJobs)); 3179 } 3180 } 3181 3182 #ifndef RMT_WILL_WATCH 3183 #ifndef USE_SELECT 3184 static void 3185 watchfd(job) 3186 Job *job; 3187 { 3188 int i; 3189 if (job->inPollfd != NULL) 3190 Punt("Watching watched job"); 3191 if (fds == NULL) { 3192 maxfds = JBSTART; 3193 fds = emalloc(sizeof(struct pollfd) * maxfds); 3194 jobfds = emalloc(sizeof(Job **) * maxfds); 3195 3196 fds[0].fd = job_pipe[0]; 3197 fds[0].events = POLLIN; 3198 jobfds[0] = &tokenWaitJob; 3199 tokenWaitJob.inPollfd = &fds[0]; 3200 nfds++; 3201 } else if (nfds == maxfds) { 3202 maxfds *= JBFACTOR; 3203 fds = erealloc(fds, sizeof(struct pollfd) * maxfds); 3204 jobfds = erealloc(jobfds, sizeof(Job **) * maxfds); 3205 for (i = 0; i < nfds; i++) 3206 jobfds[i]->inPollfd = &fds[i]; 3207 } 3208 3209 fds[nfds].fd = job->inPipe; 3210 fds[nfds].events = POLLIN; 3211 jobfds[nfds] = job; 3212 job->inPollfd = &fds[nfds]; 3213 nfds++; 3214 } 3215 3216 static void 3217 clearfd(job) 3218 Job *job; 3219 { 3220 int i; 3221 if (job->inPollfd == NULL) 3222 Punt("Unwatching unwatched job"); 3223 i = job->inPollfd - fds; 3224 nfds--; 3225 /* 3226 * Move last job in table into hole made by dead job. 3227 */ 3228 if (nfds != i) { 3229 fds[i] = fds[nfds]; 3230 jobfds[i] = jobfds[nfds]; 3231 jobfds[i]->inPollfd = &fds[i]; 3232 } 3233 job->inPollfd = NULL; 3234 } 3235 3236 static int 3237 readyfd(job) 3238 Job *job; 3239 { 3240 if (job->inPollfd == NULL) 3241 Punt("Polling unwatched job"); 3242 return (job->inPollfd->revents & POLLIN) != 0; 3243 } 3244 #endif 3245 #endif 3246 3247 /*- 3248 *----------------------------------------------------------------------- 3249 * JobTokenAdd -- 3250 * Put a token into the job pipe so that some make process can start 3251 * another job. 3252 * 3253 * Side Effects: 3254 * Allows more build jobs to be spawned somewhere. 3255 * 3256 *----------------------------------------------------------------------- 3257 */ 3258 3259 static void 3260 JobTokenAdd() 3261 { 3262 3263 if (DEBUG(JOB)) 3264 printf("deposit token\n"); 3265 write(job_pipe[1], "+", 1); 3266 } 3267 3268 /*- 3269 *----------------------------------------------------------------------- 3270 * Job_ServerStartTokenAdd -- 3271 * Prep the job token pipe in the root make process. 3272 * 3273 *----------------------------------------------------------------------- 3274 */ 3275 3276 void Job_ServerStart(maxproc) 3277 int maxproc; 3278 { 3279 int i, flags; 3280 char jobarg[64]; 3281 3282 if (pipe(job_pipe) < 0) 3283 Fatal ("error in pipe: %s", strerror(errno)); 3284 3285 /* 3286 * We mark the input side of the pipe non-blocking; we poll(2) the 3287 * pipe when we're waiting for a job token, but we might lose the 3288 * race for the token when a new one becomes available, so the read 3289 * from the pipe should not block. 3290 */ 3291 flags = fcntl(job_pipe[0], F_GETFL, 0); 3292 flags |= O_NONBLOCK; 3293 fcntl(job_pipe[0], F_SETFL, flags); 3294 3295 /* 3296 * Mark job pipes as close-on-exec. 3297 * Note that we will clear this when executing submakes. 3298 */ 3299 fcntl(job_pipe[0], F_SETFD, 1); 3300 fcntl(job_pipe[1], F_SETFD, 1); 3301 3302 snprintf(jobarg, sizeof(jobarg), "%d,%d", job_pipe[0], job_pipe[1]); 3303 3304 Var_Append(MAKEFLAGS, "-J", VAR_GLOBAL); 3305 Var_Append(MAKEFLAGS, jobarg, VAR_GLOBAL); 3306 3307 /* 3308 * Preload job_pipe with one token per job, save the one 3309 * "extra" token for the primary job. 3310 * 3311 * XXX should clip maxJobs against PIPE_BUF -- if maxJobs is 3312 * larger than the write buffer size of the pipe, we will 3313 * deadlock here. 3314 */ 3315 for (i=1; i < maxproc; i++) 3316 JobTokenAdd(); 3317 } 3318 3319 /* 3320 * this tracks the number of tokens currently "out" to build jobs. 3321 */ 3322 static int tokensOutstanding = 0; 3323 static int tokensFree = 0; 3324 /*- 3325 *----------------------------------------------------------------------- 3326 * Job_TokenReturn -- 3327 * Return a withdrawn token to the pool. 3328 * 3329 *----------------------------------------------------------------------- 3330 */ 3331 3332 void 3333 Job_TokenReturn() 3334 { 3335 tokensOutstanding--; 3336 if (tokensOutstanding < 0) 3337 Punt("token botch"); 3338 if (tokensOutstanding) 3339 tokensFree++; 3340 } 3341 3342 /*- 3343 *----------------------------------------------------------------------- 3344 * Job_TokenWithdraw -- 3345 * Attempt to withdraw a token from the pool. 3346 * 3347 * Results: 3348 * Returns TRUE if a token was withdrawn, and FALSE if the pool 3349 * is currently empty. 3350 * 3351 * Side Effects: 3352 * If pool is empty, set wantToken so that we wake up 3353 * when a token is released. 3354 * 3355 *----------------------------------------------------------------------- 3356 */ 3357 3358 3359 Boolean 3360 Job_TokenWithdraw() 3361 { 3362 char tok; 3363 int count; 3364 3365 if (aborting) 3366 return FALSE; 3367 3368 if (tokensOutstanding == 0) { 3369 if (DEBUG(JOB)) 3370 printf("first one's free\n"); 3371 tokensOutstanding++; 3372 wantToken = FALSE; 3373 return TRUE; 3374 } 3375 if (tokensFree > 0) { 3376 tokensFree--; 3377 tokensOutstanding++; 3378 wantToken = FALSE; 3379 return TRUE; 3380 } 3381 count = read(job_pipe[0], &tok, 1); 3382 if (count == 0) 3383 Fatal("eof on job pipe!"); 3384 else if (count < 0) { 3385 if (errno != EAGAIN) { 3386 Fatal("job pipe read: %s", strerror(errno)); 3387 } 3388 if (DEBUG(JOB)) 3389 printf("blocked for token\n"); 3390 wantToken = TRUE; 3391 return FALSE; 3392 } 3393 wantToken = FALSE; 3394 tokensOutstanding++; 3395 if (DEBUG(JOB)) 3396 printf("withdrew token\n"); 3397 return TRUE; 3398 } 3399 3400 /*- 3401 *----------------------------------------------------------------------- 3402 * Job_TokenRelease -- 3403 * Return free tokens to the pool. 3404 * 3405 *----------------------------------------------------------------------- 3406 */ 3407 3408 void 3409 Job_TokenRelease() 3410 { 3411 if (compatMake) return; 3412 3413 while (tokensFree-- > 0) { 3414 JobTokenAdd(); 3415 } 3416 } 3417 3418
Indexes created Tue Sep 23 01:09:51 GMT 2025