job.c revision 183465
1/*- 2 * Copyright (c) 1988, 1989, 1990, 1993 3 * The Regents of the University of California. All rights reserved. 4 * Copyright (c) 1988, 1989 by Adam de Boor 5 * Copyright (c) 1989 by Berkeley Softworks 6 * All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * Adam de Boor. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the University of 22 * California, Berkeley and its contributors. 23 * 4. Neither the name of the University nor the names of its contributors 24 * may be used to endorse or promote products derived from this software 25 * without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 30 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 37 * SUCH DAMAGE. 38 * 39 * @(#)job.c 8.2 (Berkeley) 3/19/94 40 */ 41 42#include <sys/cdefs.h> 43__FBSDID("$FreeBSD: head/usr.bin/make/job.c 183465 2008-09-29 16:13:28Z ache $"); 44 45/*- 46 * job.c -- 47 * handle the creation etc. of our child processes. 48 * 49 * Interface: 50 * Job_Make Start the creation of the given target. 51 * 52 * Job_CatchChildren 53 * Check for and handle the termination of any children. 54 * This must be called reasonably frequently to keep the 55 * whole make going at a decent clip, since job table 56 * entries aren't removed until their process is caught 57 * this way. Its single argument is TRUE if the function 58 * should block waiting for a child to terminate. 59 * 60 * Job_CatchOutput Print any output our children have produced. Should 61 * also be called fairly frequently to keep the user 62 * informed of what's going on. If no output is waiting, 63 * it will block for a time given by the SEL_* constants, 64 * below, or until output is ready. 65 * 66 * Job_Init Called to intialize this module. in addition, any 67 * commands attached to the .BEGIN target are executed 68 * before this function returns. Hence, the makefile must 69 * have been parsed before this function is called. 70 * 71 * Job_Full Return TRUE if the job table is filled. 72 * 73 * Job_Empty Return TRUE if the job table is completely empty. 74 * 75 * Job_Finish Perform any final processing which needs doing. This 76 * includes the execution of any commands which have 77 * been/were attached to the .END target. It should only 78 * be called when the job table is empty. 79 * 80 * Job_AbortAll Abort all currently running jobs. It doesn't handle 81 * output or do anything for the jobs, just kills them. 82 * It should only be called in an emergency, as it were. 83 * 84 * Job_CheckCommands 85 * Verify that the commands for a target are ok. Provide 86 * them if necessary and possible. 87 * 88 * Job_Touch Update a target without really updating it. 89 * 90 * Job_Wait Wait for all currently-running jobs to finish. 91 * 92 * compat.c -- 93 * The routines in this file implement the full-compatibility 94 * mode of PMake. Most of the special functionality of PMake 95 * is available in this mode. Things not supported: 96 * - different shells. 97 * - friendly variable substitution. 98 * 99 * Interface: 100 * Compat_Run Initialize things for this module and recreate 101 * thems as need creatin' 102 */ 103 104#include <sys/queue.h> 105#include <sys/types.h> 106#include <sys/select.h> 107#include <sys/stat.h> 108#ifdef USE_KQUEUE 109#include <sys/event.h> 110#endif 111#include <sys/wait.h> 112#include <ctype.h> 113#include <err.h> 114#include <errno.h> 115#include <fcntl.h> 116#include <inttypes.h> 117#include <string.h> 118#include <signal.h> 119#include <stdlib.h> 120#include <unistd.h> 121#include <utime.h> 122 123#include "arch.h" 124#include "buf.h" 125#include "config.h" 126#include "dir.h" 127#include "globals.h" 128#include "GNode.h" 129#include "job.h" 130#include "make.h" 131#include "parse.h" 132#include "proc.h" 133#include "shell.h" 134#include "str.h" 135#include "suff.h" 136#include "targ.h" 137#include "util.h" 138#include "var.h" 139 140#define TMPPAT "/tmp/makeXXXXXXXXXX" 141 142#ifndef USE_KQUEUE 143/* 144 * The SEL_ constants determine the maximum amount of time spent in select 145 * before coming out to see if a child has finished. SEL_SEC is the number of 146 * seconds and SEL_USEC is the number of micro-seconds 147 */ 148#define SEL_SEC 2 149#define SEL_USEC 0 150#endif /* !USE_KQUEUE */ 151 152/* 153 * Job Table definitions. 154 * 155 * The job "table" is kept as a linked Lst in 'jobs', with the number of 156 * active jobs maintained in the 'nJobs' variable. At no time will this 157 * exceed the value of 'maxJobs', initialized by the Job_Init function. 158 * 159 * When a job is finished, the Make_Update function is called on each of the 160 * parents of the node which was just remade. This takes care of the upward 161 * traversal of the dependency graph. 162 */ 163#define JOB_BUFSIZE 1024 164typedef struct Job { 165 pid_t pid; /* The child's process ID */ 166 167 struct GNode *node; /* The target the child is making */ 168 169 /* 170 * A LstNode for the first command to be saved after the job completes. 171 * This is NULL if there was no "..." in the job's commands. 172 */ 173 LstNode *tailCmds; 174 175 /* 176 * An FILE* for writing out the commands. This is only 177 * used before the job is actually started. 178 */ 179 FILE *cmdFILE; 180 181 /* 182 * A word of flags which determine how the module handles errors, 183 * echoing, etc. for the job 184 */ 185 short flags; /* Flags to control treatment of job */ 186#define JOB_IGNERR 0x001 /* Ignore non-zero exits */ 187#define JOB_SILENT 0x002 /* no output */ 188#define JOB_SPECIAL 0x004 /* Target is a special one. i.e. run it locally 189 * if we can't export it and maxLocal is 0 */ 190#define JOB_IGNDOTS 0x008 /* Ignore "..." lines when processing 191 * commands */ 192#define JOB_FIRST 0x020 /* Job is first job for the node */ 193#define JOB_RESTART 0x080 /* Job needs to be completely restarted */ 194#define JOB_RESUME 0x100 /* Job needs to be resumed b/c it stopped, 195 * for some reason */ 196#define JOB_CONTINUING 0x200 /* We are in the process of resuming this job. 197 * Used to avoid infinite recursion between 198 * JobFinish and JobRestart */ 199 200 /* union for handling shell's output */ 201 union { 202 /* 203 * This part is used when usePipes is true. 204 * The output is being caught via a pipe and the descriptors 205 * of our pipe, an array in which output is line buffered and 206 * the current position in that buffer are all maintained for 207 * each job. 208 */ 209 struct { 210 /* 211 * Input side of pipe associated with 212 * job's output channel 213 */ 214 int op_inPipe; 215 216 /* 217 * Output side of pipe associated with job's 218 * output channel 219 */ 220 int op_outPipe; 221 222 /* 223 * Buffer for storing the output of the 224 * job, line by line 225 */ 226 char op_outBuf[JOB_BUFSIZE + 1]; 227 228 /* Current position in op_outBuf */ 229 int op_curPos; 230 } o_pipe; 231 232 /* 233 * If usePipes is false the output is routed to a temporary 234 * file and all that is kept is the name of the file and the 235 * descriptor open to the file. 236 */ 237 struct { 238 /* Name of file to which shell output was rerouted */ 239 char of_outFile[sizeof(TMPPAT)]; 240 241 /* 242 * Stream open to the output file. Used to funnel all 243 * from a single job to one file while still allowing 244 * multiple shell invocations 245 */ 246 int of_outFd; 247 } o_file; 248 249 } output; /* Data for tracking a shell's output */ 250 251 TAILQ_ENTRY(Job) link; /* list link */ 252} Job; 253 254#define outPipe output.o_pipe.op_outPipe 255#define inPipe output.o_pipe.op_inPipe 256#define outBuf output.o_pipe.op_outBuf 257#define curPos output.o_pipe.op_curPos 258#define outFile output.o_file.of_outFile 259#define outFd output.o_file.of_outFd 260 261TAILQ_HEAD(JobList, Job); 262 263/* 264 * error handling variables 265 */ 266static int errors = 0; /* number of errors reported */ 267static int aborting = 0; /* why is the make aborting? */ 268#define ABORT_ERROR 1 /* Because of an error */ 269#define ABORT_INTERRUPT 2 /* Because it was interrupted */ 270#define ABORT_WAIT 3 /* Waiting for jobs to finish */ 271 272/* 273 * XXX: Avoid SunOS bug... FILENO() is fp->_file, and file 274 * is a char! So when we go above 127 we turn negative! 275 */ 276#define FILENO(a) ((unsigned)fileno(a)) 277 278/* 279 * post-make command processing. The node postCommands is really just the 280 * .END target but we keep it around to avoid having to search for it 281 * all the time. 282 */ 283static GNode *postCommands; 284 285/* 286 * The number of commands actually printed for a target. Should this 287 * number be 0, no shell will be executed. 288 */ 289static int numCommands; 290 291/* 292 * Return values from JobStart. 293 */ 294#define JOB_RUNNING 0 /* Job is running */ 295#define JOB_ERROR 1 /* Error in starting the job */ 296#define JOB_FINISHED 2 /* The job is already finished */ 297#define JOB_STOPPED 3 /* The job is stopped */ 298 299/* 300 * The maximum number of jobs that may run. This is initialize from the 301 * -j argument for the leading make and from the FIFO for sub-makes. 302 */ 303static int maxJobs; 304 305static int nJobs; /* The number of children currently running */ 306 307/* The structures that describe them */ 308static struct JobList jobs = TAILQ_HEAD_INITIALIZER(jobs); 309 310static Boolean jobFull; /* Flag to tell when the job table is full. It 311 * is set TRUE when (1) the total number of 312 * running jobs equals the maximum allowed */ 313#ifdef USE_KQUEUE 314static int kqfd; /* File descriptor obtained by kqueue() */ 315#else 316static fd_set outputs; /* Set of descriptors of pipes connected to 317 * the output channels of children */ 318#endif 319 320static GNode *lastNode; /* The node for which output was most recently 321 * produced. */ 322static const char *targFmt; /* Format string to use to head output from a 323 * job when it's not the most-recent job heard 324 * from */ 325 326#define TARG_FMT "--- %s ---\n" /* Default format */ 327#define MESSAGE(fp, gn) \ 328 fprintf(fp, targFmt, gn->name); 329 330/* 331 * When JobStart attempts to run a job but isn't allowed to 332 * or when Job_CatchChildren detects a job that has 333 * been stopped somehow, the job is placed on the stoppedJobs queue to be run 334 * when the next job finishes. 335 * 336 * Lst of Job structures describing jobs that were stopped due to 337 * concurrency limits or externally 338 */ 339static struct JobList stoppedJobs = TAILQ_HEAD_INITIALIZER(stoppedJobs); 340 341static int fifoFd; /* Fd of our job fifo */ 342static char fifoName[] = "/tmp/make_fifo_XXXXXXXXX"; 343static int fifoMaster; 344 345static sig_atomic_t interrupted; 346 347 348#if defined(USE_PGRP) && defined(SYSV) 349# define KILL(pid, sig) killpg(-(pid), (sig)) 350#else 351# if defined(USE_PGRP) 352# define KILL(pid, sig) killpg((pid), (sig)) 353# else 354# define KILL(pid, sig) kill((pid), (sig)) 355# endif 356#endif 357 358/* 359 * Grmpf... There is no way to set bits of the wait structure 360 * anymore with the stupid W*() macros. I liked the union wait 361 * stuff much more. So, we devise our own macros... This is 362 * really ugly, use dramamine sparingly. You have been warned. 363 */ 364#define W_SETMASKED(st, val, fun) \ 365 { \ 366 int sh = (int)~0; \ 367 int mask = fun(sh); \ 368 \ 369 for (sh = 0; ((mask >> sh) & 1) == 0; sh++) \ 370 continue; \ 371 *(st) = (*(st) & ~mask) | ((val) << sh); \ 372 } 373 374#define W_SETTERMSIG(st, val) W_SETMASKED(st, val, WTERMSIG) 375#define W_SETEXITSTATUS(st, val) W_SETMASKED(st, val, WEXITSTATUS) 376 377static void JobRestart(Job *); 378static int JobStart(GNode *, int, Job *); 379static void JobDoOutput(Job *, Boolean); 380static void JobInterrupt(int, int); 381static void JobRestartJobs(void); 382static int Compat_RunCommand(char *, struct GNode *); 383 384static GNode *curTarg = NULL; 385static GNode *ENDNode; 386 387/** 388 * Create a fifo file with a uniq filename, and returns a file 389 * descriptor to that fifo. 390 */ 391static int 392mkfifotemp(char *template) 393{ 394 char *start; 395 char *pathend; 396 char *ptr; 397 const unsigned char padchar[] = 398 "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"; 399 400 if (template[0] == '\0') { 401 errno = EINVAL; /* bad input string */ 402 return (-1); 403 } 404 405 /* Find end of template string. */ 406 pathend = strchr(template, '\0'); 407 ptr = pathend - 1; 408 409 /* 410 * Starting from the end of the template replace spaces with 'X' in 411 * them with random characters until there are no more 'X'. 412 */ 413 while (ptr >= template && *ptr == 'X') { 414 uint32_t rand_num = 415#if __FreeBSD_version < 800041 416 arc4random() % (sizeof(padchar) - 1); 417#else 418 arc4random_uniform(sizeof(padchar) - 1); 419#endif 420 *ptr-- = padchar[rand_num]; 421 } 422 start = ptr + 1; 423 424 /* Check the target directory. */ 425 for (; ptr > template; --ptr) { 426 if (*ptr == '/') { 427 struct stat sbuf; 428 429 *ptr = '\0'; 430 if (stat(template, &sbuf) != 0) 431 return (-1); 432 433 if (!S_ISDIR(sbuf.st_mode)) { 434 errno = ENOTDIR; 435 return (-1); 436 } 437 *ptr = '/'; 438 break; 439 } 440 } 441 442 for (;;) { 443 if (mkfifo(template, 0600) == 0) { 444 int fd; 445 446 if ((fd = open(template, O_RDWR, 0600)) < 0) { 447 unlink(template); 448 return (-1); 449 } else { 450 return (fd); 451 } 452 } else { 453 if (errno != EEXIST) { 454 return (-1); 455 } 456 } 457 458 /* 459 * If we have a collision, cycle through the space of 460 * filenames. 461 */ 462 for (ptr = start;;) { 463 char *pad; 464 465 if (*ptr == '\0' || ptr == pathend) 466 return (-1); 467 468 pad = strchr(padchar, *ptr); 469 if (pad == NULL || *++pad == '\0') { 470 *ptr++ = padchar[0]; 471 } else { 472 *ptr++ = *pad; 473 break; 474 } 475 } 476 } 477 /*NOTREACHED*/ 478} 479 480static void 481catch_child(int sig __unused) 482{ 483} 484 485/** 486 */ 487void 488Proc_Init() 489{ 490 /* 491 * Catch SIGCHLD so that we get kicked out of select() when we 492 * need to look at a child. This is only known to matter for the 493 * -j case (perhaps without -P). 494 * 495 * XXX this is intentionally misplaced. 496 */ 497 struct sigaction sa; 498 499 sigemptyset(&sa.sa_mask); 500 sa.sa_flags = SA_RESTART | SA_NOCLDSTOP; 501 sa.sa_handler = catch_child; 502 sigaction(SIGCHLD, &sa, NULL); 503} 504 505/** 506 * Wait for child process to terminate. 507 */ 508static int 509ProcWait(ProcStuff *ps) 510{ 511 pid_t pid; 512 int status; 513 514 /* 515 * Wait for the process to exit. 516 */ 517 for (;;) { 518 pid = wait(&status); 519 if (pid == -1 && errno != EINTR) { 520 Fatal("error in wait: %d", pid); 521 /* NOTREACHED */ 522 } 523 if (pid == ps->child_pid) { 524 break; 525 } 526 if (interrupted) { 527 break; 528 } 529 } 530 531 return (status); 532} 533 534/** 535 * JobCatchSignal 536 * Got a signal. Set global variables and hope that someone will 537 * handle it. 538 */ 539static void 540JobCatchSig(int signo) 541{ 542 543 interrupted = signo; 544} 545 546/** 547 * JobPassSig -- 548 * Pass a signal on to all local jobs if 549 * USE_PGRP is defined, then die ourselves. 550 * 551 * Side Effects: 552 * We die by the same signal. 553 */ 554static void 555JobPassSig(int signo) 556{ 557 Job *job; 558 sigset_t nmask, omask; 559 struct sigaction act; 560 561 sigemptyset(&nmask); 562 sigaddset(&nmask, signo); 563 sigprocmask(SIG_SETMASK, &nmask, &omask); 564 565 DEBUGF(JOB, ("JobPassSig(%d) called.\n", signo)); 566 TAILQ_FOREACH(job, &jobs, link) { 567 DEBUGF(JOB, ("JobPassSig passing signal %d to child %jd.\n", 568 signo, (intmax_t)job->pid)); 569 KILL(job->pid, signo); 570 } 571 572 /* 573 * Deal with proper cleanup based on the signal received. We only run 574 * the .INTERRUPT target if the signal was in fact an interrupt. 575 * The other three termination signals are more of a "get out *now*" 576 * command. 577 */ 578 if (signo == SIGINT) { 579 JobInterrupt(TRUE, signo); 580 } else if (signo == SIGHUP || signo == SIGTERM || signo == SIGQUIT) { 581 JobInterrupt(FALSE, signo); 582 } 583 584 /* 585 * Leave gracefully if SIGQUIT, rather than core dumping. 586 */ 587 if (signo == SIGQUIT) { 588 signo = SIGINT; 589 } 590 591 /* 592 * Send ourselves the signal now we've given the message to everyone 593 * else. Note we block everything else possible while we're getting 594 * the signal. This ensures that all our jobs get continued when we 595 * wake up before we take any other signal. 596 * XXX this comment seems wrong. 597 */ 598 act.sa_handler = SIG_DFL; 599 sigemptyset(&act.sa_mask); 600 act.sa_flags = 0; 601 sigaction(signo, &act, NULL); 602 603 DEBUGF(JOB, ("JobPassSig passing signal to self, mask = %x.\n", 604 ~0 & ~(1 << (signo - 1)))); 605 signal(signo, SIG_DFL); 606 607 KILL(getpid(), signo); 608 609 signo = SIGCONT; 610 TAILQ_FOREACH(job, &jobs, link) { 611 DEBUGF(JOB, ("JobPassSig passing signal %d to child %jd.\n", 612 signo, (intmax_t)job->pid)); 613 KILL(job->pid, signo); 614 } 615 616 sigprocmask(SIG_SETMASK, &omask, NULL); 617 sigprocmask(SIG_SETMASK, &omask, NULL); 618 act.sa_handler = JobPassSig; 619 sigaction(signo, &act, NULL); 620} 621 622/** 623 * JobPrintCommand -- 624 * Put out another command for the given job. If the command starts 625 * with an @ or a - we process it specially. In the former case, 626 * so long as the -s and -n flags weren't given to make, we stick 627 * a shell-specific echoOff command in the script. In the latter, 628 * we ignore errors for the entire job, unless the shell has error 629 * control. 630 * If the command is just "..." we take all future commands for this 631 * job to be commands to be executed once the entire graph has been 632 * made and return non-zero to signal that the end of the commands 633 * was reached. These commands are later attached to the postCommands 634 * node and executed by Job_Finish when all things are done. 635 * This function is called from JobStart via LST_FOREACH. 636 * 637 * Results: 638 * Always 0, unless the command was "..." 639 * 640 * Side Effects: 641 * If the command begins with a '-' and the shell has no error control, 642 * the JOB_IGNERR flag is set in the job descriptor. 643 * If the command is "..." and we're not ignoring such things, 644 * tailCmds is set to the successor node of the cmd. 645 * numCommands is incremented if the command is actually printed. 646 */ 647static int 648JobPrintCommand(char *cmd, Job *job) 649{ 650 Boolean noSpecials; /* true if we shouldn't worry about 651 * inserting special commands into 652 * the input stream. */ 653 Boolean shutUp = FALSE; /* true if we put a no echo command 654 * into the command file */ 655 Boolean errOff = FALSE; /* true if we turned error checking 656 * off before printing the command 657 * and need to turn it back on */ 658 const char *cmdTemplate;/* Template to use when printing the command */ 659 char *cmdStart; /* Start of expanded command */ 660 LstNode *cmdNode; /* Node for replacing the command */ 661 662 noSpecials = (noExecute && !(job->node->type & OP_MAKE)); 663 664 if (strcmp(cmd, "...") == 0) { 665 job->node->type |= OP_SAVE_CMDS; 666 if ((job->flags & JOB_IGNDOTS) == 0) { 667 job->tailCmds = 668 Lst_Succ(Lst_Member(&job->node->commands, cmd)); 669 return (1); 670 } 671 return (0); 672 } 673 674#define DBPRINTF(fmt, arg) \ 675 DEBUGF(JOB, (fmt, arg)); \ 676 fprintf(job->cmdFILE, fmt, arg); \ 677 fflush(job->cmdFILE); 678 679 numCommands += 1; 680 681 /* 682 * For debugging, we replace each command with the result of expanding 683 * the variables in the command. 684 */ 685 cmdNode = Lst_Member(&job->node->commands, cmd); 686 687 cmd = Buf_Peel(Var_Subst(cmd, job->node, FALSE)); 688 cmdStart = cmd; 689 690 Lst_Replace(cmdNode, cmdStart); 691 692 cmdTemplate = "%s\n"; 693 694 /* 695 * Check for leading @', -' or +'s to control echoing, error checking, 696 * and execution on -n. 697 */ 698 while (*cmd == '@' || *cmd == '-' || *cmd == '+') { 699 switch (*cmd) { 700 701 case '@': 702 shutUp = DEBUG(LOUD) ? FALSE : TRUE; 703 break; 704 705 case '-': 706 errOff = TRUE; 707 break; 708 709 case '+': 710 if (noSpecials) { 711 /* 712 * We're not actually exececuting anything... 713 * but this one needs to be - use compat mode 714 * just for it. 715 */ 716 Compat_RunCommand(cmd, job->node); 717 return (0); 718 } 719 break; 720 } 721 cmd++; 722 } 723 724 while (isspace((unsigned char)*cmd)) 725 cmd++; 726 727 if (shutUp) { 728 if (!(job->flags & JOB_SILENT) && !noSpecials && 729 commandShell->hasEchoCtl) { 730 DBPRINTF("%s\n", commandShell->echoOff); 731 } else { 732 shutUp = FALSE; 733 } 734 } 735 736 if (errOff) { 737 if (!(job->flags & JOB_IGNERR) && !noSpecials) { 738 if (commandShell->hasErrCtl) { 739 /* 740 * We don't want the error-control commands 741 * showing up either, so we turn off echoing 742 * while executing them. We could put another 743 * field in the shell structure to tell 744 * JobDoOutput to look for this string too, 745 * but why make it any more complex than 746 * it already is? 747 */ 748 if (!(job->flags & JOB_SILENT) && !shutUp && 749 commandShell->hasEchoCtl) { 750 DBPRINTF("%s\n", commandShell->echoOff); 751 DBPRINTF("%s\n", commandShell->ignErr); 752 DBPRINTF("%s\n", commandShell->echoOn); 753 } else { 754 DBPRINTF("%s\n", commandShell->ignErr); 755 } 756 } else if (commandShell->ignErr && 757 *commandShell->ignErr != '\0') { 758 /* 759 * The shell has no error control, so we need to 760 * be weird to get it to ignore any errors from 761 * the command. If echoing is turned on, we turn 762 * it off and use the errCheck template to echo 763 * the command. Leave echoing off so the user 764 * doesn't see the weirdness we go through to 765 * ignore errors. Set cmdTemplate to use the 766 * weirdness instead of the simple "%s\n" 767 * template. 768 */ 769 if (!(job->flags & JOB_SILENT) && !shutUp && 770 commandShell->hasEchoCtl) { 771 DBPRINTF("%s\n", commandShell->echoOff); 772 DBPRINTF(commandShell->errCheck, cmd); 773 shutUp = TRUE; 774 } 775 cmdTemplate = commandShell->ignErr; 776 /* 777 * The error ignoration (hee hee) is already 778 * taken care of by the ignErr template, so 779 * pretend error checking is still on. 780 */ 781 errOff = FALSE; 782 } else { 783 errOff = FALSE; 784 } 785 } else { 786 errOff = FALSE; 787 } 788 } 789 790 DBPRINTF(cmdTemplate, cmd); 791 792 if (errOff) { 793 /* 794 * If echoing is already off, there's no point in issuing the 795 * echoOff command. Otherwise we issue it and pretend it was on 796 * for the whole command... 797 */ 798 if (!shutUp && !(job->flags & JOB_SILENT) && 799 commandShell->hasEchoCtl) { 800 DBPRINTF("%s\n", commandShell->echoOff); 801 shutUp = TRUE; 802 } 803 DBPRINTF("%s\n", commandShell->errCheck); 804 } 805 if (shutUp) { 806 DBPRINTF("%s\n", commandShell->echoOn); 807 } 808 return (0); 809} 810 811/** 812 * JobClose -- 813 * Called to close both input and output pipes when a job is finished. 814 * 815 * Side Effects: 816 * The file descriptors associated with the job are closed. 817 */ 818static void 819JobClose(Job *job) 820{ 821 822 if (usePipes) { 823#if !defined(USE_KQUEUE) 824 FD_CLR(job->inPipe, &outputs); 825#endif 826 if (job->outPipe != job->inPipe) { 827 close(job->outPipe); 828 } 829 JobDoOutput(job, TRUE); 830 close(job->inPipe); 831 } else { 832 close(job->outFd); 833 JobDoOutput(job, TRUE); 834 } 835} 836 837/** 838 * JobFinish -- 839 * Do final processing for the given job including updating 840 * parents and starting new jobs as available/necessary. Note 841 * that we pay no attention to the JOB_IGNERR flag here. 842 * This is because when we're called because of a noexecute flag 843 * or something, jstat.w_status is 0 and when called from 844 * Job_CatchChildren, the status is zeroed if it s/b ignored. 845 * 846 * Side Effects: 847 * Some nodes may be put on the toBeMade queue. 848 * Final commands for the job are placed on postCommands. 849 * 850 * If we got an error and are aborting (aborting == ABORT_ERROR) and 851 * the job list is now empty, we are done for the day. 852 * If we recognized an error (errors !=0), we set the aborting flag 853 * to ABORT_ERROR so no more jobs will be started. 854 */ 855static void 856JobFinish(Job *job, int *status) 857{ 858 Boolean done; 859 LstNode *ln; 860 861 if (WIFEXITED(*status)) { 862 int job_status = WEXITSTATUS(*status); 863 864 JobClose(job); 865 /* 866 * Deal with ignored errors in -B mode. We need to 867 * print a message telling of the ignored error as 868 * well as setting status.w_status to 0 so the next 869 * command gets run. To do this, we set done to be 870 * TRUE if in -B mode and the job exited non-zero. 871 */ 872 if (job_status == 0) { 873 done = FALSE; 874 } else { 875 if (job->flags & JOB_IGNERR) { 876 done = TRUE; 877 } else { 878 /* 879 * If it exited non-zero and either we're 880 * doing things our way or we're not ignoring 881 * errors, the job is finished. Similarly, if 882 * the shell died because of a signal the job 883 * is also finished. In these cases, finish 884 * out the job's output before printing the 885 * exit status... 886 */ 887 done = TRUE; 888 if (job->cmdFILE != NULL && 889 job->cmdFILE != stdout) { 890 fclose(job->cmdFILE); 891 } 892 893 } 894 } 895 } else if (WIFSIGNALED(*status)) { 896 if (WTERMSIG(*status) == SIGCONT) { 897 /* 898 * No need to close things down or anything. 899 */ 900 done = FALSE; 901 } else { 902 /* 903 * If it exited non-zero and either we're 904 * doing things our way or we're not ignoring 905 * errors, the job is finished. Similarly, if 906 * the shell died because of a signal the job 907 * is also finished. In these cases, finish 908 * out the job's output before printing the 909 * exit status... 910 */ 911 JobClose(job); 912 if (job->cmdFILE != NULL && 913 job->cmdFILE != stdout) { 914 fclose(job->cmdFILE); 915 } 916 done = TRUE; 917 } 918 } else { 919 /* 920 * No need to close things down or anything. 921 */ 922 done = FALSE; 923 } 924 925 if (WIFEXITED(*status)) { 926 if (done || DEBUG(JOB)) { 927 FILE *out; 928 929 if (compatMake && 930 !usePipes && 931 (job->flags & JOB_IGNERR)) { 932 /* 933 * If output is going to a file and this job 934 * is ignoring errors, arrange to have the 935 * exit status sent to the output file as 936 * well. 937 */ 938 out = fdopen(job->outFd, "w"); 939 if (out == NULL) 940 Punt("Cannot fdopen"); 941 } else { 942 out = stdout; 943 } 944 945 DEBUGF(JOB, ("Process %jd exited.\n", 946 (intmax_t)job->pid)); 947 948 if (WEXITSTATUS(*status) == 0) { 949 if (DEBUG(JOB)) { 950 if (usePipes && job->node != lastNode) { 951 MESSAGE(out, job->node); 952 lastNode = job->node; 953 } 954 fprintf(out, 955 "*** Completed successfully\n"); 956 } 957 } else { 958 if (usePipes && job->node != lastNode) { 959 MESSAGE(out, job->node); 960 lastNode = job->node; 961 } 962 fprintf(out, "*** Error code %d%s\n", 963 WEXITSTATUS(*status), 964 (job->flags & JOB_IGNERR) ? 965 "(ignored)" : ""); 966 967 if (job->flags & JOB_IGNERR) { 968 *status = 0; 969 } 970 } 971 972 fflush(out); 973 } 974 } else if (WIFSIGNALED(*status)) { 975 if (done || DEBUG(JOB) || (WTERMSIG(*status) == SIGCONT)) { 976 FILE *out; 977 978 if (compatMake && 979 !usePipes && 980 (job->flags & JOB_IGNERR)) { 981 /* 982 * If output is going to a file and this job 983 * is ignoring errors, arrange to have the 984 * exit status sent to the output file as 985 * well. 986 */ 987 out = fdopen(job->outFd, "w"); 988 if (out == NULL) 989 Punt("Cannot fdopen"); 990 } else { 991 out = stdout; 992 } 993 994 if (WTERMSIG(*status) == SIGCONT) { 995 /* 996 * If the beastie has continued, shift the 997 * Job from the stopped list to the running 998 * one (or re-stop it if concurrency is 999 * exceeded) and go and get another child. 1000 */ 1001 if (job->flags & (JOB_RESUME | JOB_RESTART)) { 1002 if (usePipes && job->node != lastNode) { 1003 MESSAGE(out, job->node); 1004 lastNode = job->node; 1005 } 1006 fprintf(out, "*** Continued\n"); 1007 } 1008 if (!(job->flags & JOB_CONTINUING)) { 1009 DEBUGF(JOB, ("Warning: process %jd was not " 1010 "continuing.\n", (intmax_t) job->pid)); 1011#ifdef notdef 1012 /* 1013 * We don't really want to restart a 1014 * job from scratch just because it 1015 * continued, especially not without 1016 * killing the continuing process! 1017 * That's why this is ifdef'ed out. 1018 * FD - 9/17/90 1019 */ 1020 JobRestart(job); 1021#endif 1022 } 1023 job->flags &= ~JOB_CONTINUING; 1024 TAILQ_INSERT_TAIL(&jobs, job, link); 1025 nJobs += 1; 1026 DEBUGF(JOB, ("Process %jd is continuing locally.\n", 1027 (intmax_t) job->pid)); 1028 if (nJobs == maxJobs) { 1029 jobFull = TRUE; 1030 DEBUGF(JOB, ("Job queue is full.\n")); 1031 } 1032 fflush(out); 1033 return; 1034 1035 } else { 1036 if (usePipes && job->node != lastNode) { 1037 MESSAGE(out, job->node); 1038 lastNode = job->node; 1039 } 1040 fprintf(out, 1041 "*** Signal %d\n", WTERMSIG(*status)); 1042 fflush(out); 1043 } 1044 } 1045 } else { 1046 /* STOPPED */ 1047 FILE *out; 1048 1049 if (compatMake && !usePipes && (job->flags & JOB_IGNERR)) { 1050 /* 1051 * If output is going to a file and this job 1052 * is ignoring errors, arrange to have the 1053 * exit status sent to the output file as 1054 * well. 1055 */ 1056 out = fdopen(job->outFd, "w"); 1057 if (out == NULL) 1058 Punt("Cannot fdopen"); 1059 } else { 1060 out = stdout; 1061 } 1062 1063 DEBUGF(JOB, ("Process %jd stopped.\n", (intmax_t) job->pid)); 1064 if (usePipes && job->node != lastNode) { 1065 MESSAGE(out, job->node); 1066 lastNode = job->node; 1067 } 1068 fprintf(out, "*** Stopped -- signal %d\n", WSTOPSIG(*status)); 1069 job->flags |= JOB_RESUME; 1070 TAILQ_INSERT_TAIL(&stoppedJobs, job, link); 1071 fflush(out); 1072 return; 1073 } 1074 1075 /* 1076 * Now handle the -B-mode stuff. If the beast still isn't finished, 1077 * try and restart the job on the next command. If JobStart says it's 1078 * ok, it's ok. If there's an error, this puppy is done. 1079 */ 1080 if (compatMake && WIFEXITED(*status) && 1081 Lst_Succ(job->node->compat_command) != NULL) { 1082 switch (JobStart(job->node, job->flags & JOB_IGNDOTS, job)) { 1083 case JOB_RUNNING: 1084 done = FALSE; 1085 break; 1086 case JOB_ERROR: 1087 done = TRUE; 1088 W_SETEXITSTATUS(status, 1); 1089 break; 1090 case JOB_FINISHED: 1091 /* 1092 * If we got back a JOB_FINISHED code, JobStart has 1093 * already called Make_Update and freed the job 1094 * descriptor. We set done to false here to avoid fake 1095 * cycles and double frees. JobStart needs to do the 1096 * update so we can proceed up the graph when given 1097 * the -n flag.. 1098 */ 1099 done = FALSE; 1100 break; 1101 default: 1102 break; 1103 } 1104 } else { 1105 done = TRUE; 1106 } 1107 1108 if (done && aborting != ABORT_ERROR && 1109 aborting != ABORT_INTERRUPT && *status == 0) { 1110 /* 1111 * As long as we aren't aborting and the job didn't return a 1112 * non-zero status that we shouldn't ignore, we call 1113 * Make_Update to update the parents. In addition, any saved 1114 * commands for the node are placed on the .END target. 1115 */ 1116 for (ln = job->tailCmds; ln != NULL; ln = LST_NEXT(ln)) { 1117 Lst_AtEnd(&postCommands->commands, 1118 Buf_Peel( 1119 Var_Subst(Lst_Datum(ln), job->node, FALSE))); 1120 } 1121 1122 job->node->made = MADE; 1123 Make_Update(job->node); 1124 free(job); 1125 1126 } else if (*status != 0) { 1127 errors += 1; 1128 free(job); 1129 } 1130 1131 JobRestartJobs(); 1132 1133 /* 1134 * Set aborting if any error. 1135 */ 1136 if (errors && !keepgoing && aborting != ABORT_INTERRUPT) { 1137 /* 1138 * If we found any errors in this batch of children and the -k 1139 * flag wasn't given, we set the aborting flag so no more jobs 1140 * get started. 1141 */ 1142 aborting = ABORT_ERROR; 1143 } 1144 1145 if (aborting == ABORT_ERROR && Job_Empty()) { 1146 /* 1147 * If we are aborting and the job table is now empty, we finish. 1148 */ 1149 Finish(errors); 1150 } 1151} 1152 1153/** 1154 * Job_Touch 1155 * Touch the given target. Called by JobStart when the -t flag was 1156 * given. Prints messages unless told to be silent. 1157 * 1158 * Side Effects: 1159 * The data modification of the file is changed. In addition, if the 1160 * file did not exist, it is created. 1161 */ 1162void 1163Job_Touch(GNode *gn, Boolean silent) 1164{ 1165 int streamID; /* ID of stream opened to do the touch */ 1166 struct utimbuf times; /* Times for utime() call */ 1167 1168 if (gn->type & (OP_JOIN | OP_USE | OP_EXEC | OP_OPTIONAL)) { 1169 /* 1170 * .JOIN, .USE, .ZEROTIME and .OPTIONAL targets are "virtual" 1171 * targets and, as such, shouldn't really be created. 1172 */ 1173 return; 1174 } 1175 1176 if (!silent) { 1177 fprintf(stdout, "touch %s\n", gn->name); 1178 fflush(stdout); 1179 } 1180 1181 if (noExecute) { 1182 return; 1183 } 1184 1185 if (gn->type & OP_ARCHV) { 1186 Arch_Touch(gn); 1187 } else if (gn->type & OP_LIB) { 1188 Arch_TouchLib(gn); 1189 } else { 1190 char *file = gn->path ? gn->path : gn->name; 1191 1192 times.actime = times.modtime = now; 1193 if (utime(file, ×) < 0) { 1194 streamID = open(file, O_RDWR | O_CREAT, 0666); 1195 1196 if (streamID >= 0) { 1197 char c; 1198 1199 /* 1200 * Read and write a byte to the file to change 1201 * the modification time, then close the file. 1202 */ 1203 if (read(streamID, &c, 1) == 1) { 1204 lseek(streamID, (off_t)0, SEEK_SET); 1205 write(streamID, &c, 1); 1206 } 1207 1208 close(streamID); 1209 } else { 1210 fprintf(stdout, "*** couldn't touch %s: %s", 1211 file, strerror(errno)); 1212 fflush(stdout); 1213 } 1214 } 1215 } 1216} 1217 1218/** 1219 * Job_CheckCommands 1220 * Make sure the given node has all the commands it needs. 1221 * 1222 * Results: 1223 * TRUE if the commands list is/was ok. 1224 * 1225 * Side Effects: 1226 * The node will have commands from the .DEFAULT rule added to it 1227 * if it needs them. 1228 */ 1229Boolean 1230Job_CheckCommands(GNode *gn, void (*abortProc)(const char *, ...)) 1231{ 1232 1233 if (OP_NOP(gn->type) && Lst_IsEmpty(&gn->commands) && 1234 (gn->type & OP_LIB) == 0) { 1235 /* 1236 * No commands. Look for .DEFAULT rule from which we might infer 1237 * commands. 1238 */ 1239 if (DEFAULT != NULL && !Lst_IsEmpty(&DEFAULT->commands)) { 1240 /* 1241 * Make only looks for a .DEFAULT if the node was 1242 * never the target of an operator, so that's what we 1243 * do too. If a .DEFAULT was given, we substitute its 1244 * commands for gn's commands and set the IMPSRC 1245 * variable to be the target's name The DEFAULT node 1246 * acts like a transformation rule, in that gn also 1247 * inherits any attributes or sources attached to 1248 * .DEFAULT itself. 1249 */ 1250 Make_HandleUse(DEFAULT, gn); 1251 Var_Set(IMPSRC, Var_Value(TARGET, gn), gn); 1252 1253 } else if (Dir_MTime(gn) == 0) { 1254 /* 1255 * The node wasn't the target of an operator we have 1256 * no .DEFAULT rule to go on and the target doesn't 1257 * already exist. There's nothing more we can do for 1258 * this branch. If the -k flag wasn't given, we stop 1259 * in our tracks, otherwise we just don't update 1260 * this node's parents so they never get examined. 1261 */ 1262 static const char msg[] = 1263 "make: don't know how to make"; 1264 1265 if (gn->type & OP_OPTIONAL) { 1266 fprintf(stdout, "%s %s(ignored)\n", 1267 msg, gn->name); 1268 fflush(stdout); 1269 } else if (keepgoing) { 1270 fprintf(stdout, "%s %s(continuing)\n", 1271 msg, gn->name); 1272 fflush(stdout); 1273 return (FALSE); 1274 } else { 1275#ifndef WITHOUT_OLD_JOKE 1276 if (strcmp(gn->name,"love") == 0) 1277 (*abortProc)("Not war."); 1278 else 1279#endif 1280 (*abortProc)("%s %s. Stop", 1281 msg, gn->name); 1282 return (FALSE); 1283 } 1284 } 1285 } 1286 return (TRUE); 1287} 1288 1289/** 1290 * JobExec 1291 * Execute the shell for the given job. Called from JobStart and 1292 * JobRestart. 1293 * 1294 * Side Effects: 1295 * A shell is executed, outputs is altered and the Job structure added 1296 * to the job table. 1297 */ 1298static void 1299JobExec(Job *job, char **argv) 1300{ 1301 ProcStuff ps; 1302 1303 if (DEBUG(JOB)) { 1304 int i; 1305 1306 DEBUGF(JOB, ("Running %s\n", job->node->name)); 1307 DEBUGF(JOB, ("\tCommand: ")); 1308 for (i = 0; argv[i] != NULL; i++) { 1309 DEBUGF(JOB, ("%s ", argv[i])); 1310 } 1311 DEBUGF(JOB, ("\n")); 1312 } 1313 1314 /* 1315 * Some jobs produce no output and it's disconcerting to have 1316 * no feedback of their running (since they produce no output, the 1317 * banner with their name in it never appears). This is an attempt to 1318 * provide that feedback, even if nothing follows it. 1319 */ 1320 if (lastNode != job->node && (job->flags & JOB_FIRST) && 1321 !(job->flags & JOB_SILENT)) { 1322 MESSAGE(stdout, job->node); 1323 lastNode = job->node; 1324 } 1325 1326 ps.in = FILENO(job->cmdFILE); 1327 if (usePipes) { 1328 /* 1329 * Set up the child's output to be routed through the 1330 * pipe we've created for it. 1331 */ 1332 ps.out = job->outPipe; 1333 } else { 1334 /* 1335 * We're capturing output in a file, so we duplicate 1336 * the descriptor to the temporary file into the 1337 * standard output. 1338 */ 1339 ps.out = job->outFd; 1340 } 1341 ps.err = STDERR_FILENO; 1342 1343 ps.merge_errors = 1; 1344 ps.pgroup = 1; 1345 ps.searchpath = 0; 1346 1347 ps.argv = argv; 1348 ps.argv_free = 0; 1349 1350 /* 1351 * Fork. Warning since we are doing vfork() instead of fork(), 1352 * do not allocate memory in the child process! 1353 */ 1354 if ((ps.child_pid = vfork()) == -1) { 1355 Punt("Cannot fork"); 1356 1357 1358 } else if (ps.child_pid == 0) { 1359 /* 1360 * Child 1361 */ 1362 if (fifoFd >= 0) 1363 close(fifoFd); 1364 1365 Proc_Exec(&ps); 1366 /* NOTREACHED */ 1367 } 1368 1369 /* 1370 * Parent 1371 */ 1372 job->pid = ps.child_pid; 1373 1374 if (usePipes && (job->flags & JOB_FIRST)) { 1375 /* 1376 * The first time a job is run for a node, we set the 1377 * current position in the buffer to the beginning and 1378 * mark another stream to watch in the outputs mask. 1379 */ 1380#ifdef USE_KQUEUE 1381 struct kevent kev[2]; 1382#endif 1383 job->curPos = 0; 1384 1385#if defined(USE_KQUEUE) 1386 EV_SET(&kev[0], job->inPipe, EVFILT_READ, EV_ADD, 0, 0, job); 1387 EV_SET(&kev[1], job->pid, EVFILT_PROC, 1388 EV_ADD | EV_ONESHOT, NOTE_EXIT, 0, NULL); 1389 if (kevent(kqfd, kev, 2, NULL, 0, NULL) != 0) { 1390 /* 1391 * kevent() will fail if the job is already 1392 * finished 1393 */ 1394 if (errno != EINTR && errno != EBADF && errno != ESRCH) 1395 Punt("kevent: %s", strerror(errno)); 1396 } 1397#else 1398 FD_SET(job->inPipe, &outputs); 1399#endif /* USE_KQUEUE */ 1400 } 1401 1402 if (job->cmdFILE != NULL && job->cmdFILE != stdout) { 1403 fclose(job->cmdFILE); 1404 job->cmdFILE = NULL; 1405 } 1406 1407 /* 1408 * Now the job is actually running, add it to the table. 1409 */ 1410 nJobs += 1; 1411 TAILQ_INSERT_TAIL(&jobs, job, link); 1412 if (nJobs == maxJobs) { 1413 jobFull = TRUE; 1414 } 1415} 1416 1417/** 1418 * JobMakeArgv 1419 * Create the argv needed to execute the shell for a given job. 1420 */ 1421static void 1422JobMakeArgv(Job *job, char **argv) 1423{ 1424 int argc; 1425 static char args[10]; /* For merged arguments */ 1426 1427 argv[0] = commandShell->name; 1428 argc = 1; 1429 1430 if ((commandShell->exit && *commandShell->exit != '-') || 1431 (commandShell->echo && *commandShell->echo != '-')) { 1432 /* 1433 * At least one of the flags doesn't have a minus before it, so 1434 * merge them together. Have to do this because the *(&(@*#*&#$# 1435 * Bourne shell thinks its second argument is a file to source. 1436 * Grrrr. Note the ten-character limitation on the combined 1437 * arguments. 1438 */ 1439 sprintf(args, "-%s%s", (job->flags & JOB_IGNERR) ? "" : 1440 commandShell->exit ? commandShell->exit : "", 1441 (job->flags & JOB_SILENT) ? "" : 1442 commandShell->echo ? commandShell->echo : ""); 1443 1444 if (args[1]) { 1445 argv[argc] = args; 1446 argc++; 1447 } 1448 } else { 1449 if (!(job->flags & JOB_IGNERR) && commandShell->exit) { 1450 argv[argc] = commandShell->exit; 1451 argc++; 1452 } 1453 if (!(job->flags & JOB_SILENT) && commandShell->echo) { 1454 argv[argc] = commandShell->echo; 1455 argc++; 1456 } 1457 } 1458 argv[argc] = NULL; 1459} 1460 1461/** 1462 * JobRestart 1463 * Restart a job that stopped for some reason. The job must be neither 1464 * on the jobs nor on the stoppedJobs list. 1465 * 1466 * Side Effects: 1467 * jobFull will be set if the job couldn't be run. 1468 */ 1469static void 1470JobRestart(Job *job) 1471{ 1472 1473 if (job->flags & JOB_RESTART) { 1474 /* 1475 * Set up the control arguments to the shell. This is based on 1476 * the flags set earlier for this job. If the JOB_IGNERR flag 1477 * is clear, the 'exit' flag of the commandShell is used to 1478 * cause it to exit upon receiving an error. If the JOB_SILENT 1479 * flag is clear, the 'echo' flag of the commandShell is used 1480 * to get it to start echoing as soon as it starts 1481 * processing commands. 1482 */ 1483 char *argv[4]; 1484 1485 JobMakeArgv(job, argv); 1486 1487 DEBUGF(JOB, ("Restarting %s...", job->node->name)); 1488 if (nJobs >= maxJobs && !(job->flags & JOB_SPECIAL)) { 1489 /* 1490 * Not allowed to run -- put it back on the hold 1491 * queue and mark the table full 1492 */ 1493 DEBUGF(JOB, ("holding\n")); 1494 TAILQ_INSERT_HEAD(&stoppedJobs, job, link); 1495 jobFull = TRUE; 1496 DEBUGF(JOB, ("Job queue is full.\n")); 1497 return; 1498 } else { 1499 /* 1500 * Job may be run locally. 1501 */ 1502 DEBUGF(JOB, ("running locally\n")); 1503 } 1504 JobExec(job, argv); 1505 1506 } else { 1507 /* 1508 * The job has stopped and needs to be restarted. 1509 * Why it stopped, we don't know... 1510 */ 1511 DEBUGF(JOB, ("Resuming %s...", job->node->name)); 1512 if ((nJobs < maxJobs || ((job->flags & JOB_SPECIAL) && 1513 maxJobs == 0)) && nJobs != maxJobs) { 1514 /* 1515 * If we haven't reached the concurrency limit already 1516 * (or the job must be run and maxJobs is 0), it's ok 1517 * to resume it. 1518 */ 1519 Boolean error; 1520 int status; 1521 1522 error = (KILL(job->pid, SIGCONT) != 0); 1523 1524 if (!error) { 1525 /* 1526 * Make sure the user knows we've continued 1527 * the beast and actually put the thing in the 1528 * job table. 1529 */ 1530 job->flags |= JOB_CONTINUING; 1531 status = 0; 1532 W_SETTERMSIG(&status, SIGCONT); 1533 JobFinish(job, &status); 1534 1535 job->flags &= ~(JOB_RESUME|JOB_CONTINUING); 1536 DEBUGF(JOB, ("done\n")); 1537 } else { 1538 Error("couldn't resume %s: %s", 1539 job->node->name, strerror(errno)); 1540 status = 0; 1541 W_SETEXITSTATUS(&status, 1); 1542 JobFinish(job, &status); 1543 } 1544 } else { 1545 /* 1546 * Job cannot be restarted. Mark the table as full and 1547 * place the job back on the list of stopped jobs. 1548 */ 1549 DEBUGF(JOB, ("table full\n")); 1550 TAILQ_INSERT_HEAD(&stoppedJobs, job, link); 1551 jobFull = TRUE; 1552 DEBUGF(JOB, ("Job queue is full.\n")); 1553 } 1554 } 1555} 1556 1557/** 1558 * JobStart 1559 * Start a target-creation process going for the target described 1560 * by the graph node gn. 1561 * 1562 * Results: 1563 * JOB_ERROR if there was an error in the commands, JOB_FINISHED 1564 * if there isn't actually anything left to do for the job and 1565 * JOB_RUNNING if the job has been started. 1566 * 1567 * Side Effects: 1568 * A new Job node is created and added to the list of running 1569 * jobs. PMake is forked and a child shell created. 1570 */ 1571static int 1572JobStart(GNode *gn, int flags, Job *previous) 1573{ 1574 Job *job; /* new job descriptor */ 1575 char *argv[4]; /* Argument vector to shell */ 1576 Boolean cmdsOK; /* true if the nodes commands were all right */ 1577 Boolean noExec; /* Set true if we decide not to run the job */ 1578 int tfd; /* File descriptor for temp file */ 1579 LstNode *ln; 1580 char tfile[sizeof(TMPPAT)]; 1581 1582 if (interrupted) { 1583 JobPassSig(interrupted); 1584 return (JOB_ERROR); 1585 } 1586 if (previous != NULL) { 1587 previous->flags &= ~(JOB_FIRST | JOB_IGNERR | JOB_SILENT); 1588 job = previous; 1589 } else { 1590 job = emalloc(sizeof(Job)); 1591 flags |= JOB_FIRST; 1592 } 1593 1594 job->node = gn; 1595 job->tailCmds = NULL; 1596 1597 /* 1598 * Set the initial value of the flags for this job based on the global 1599 * ones and the node's attributes... Any flags supplied by the caller 1600 * are also added to the field. 1601 */ 1602 job->flags = 0; 1603 if (Targ_Ignore(gn)) { 1604 job->flags |= JOB_IGNERR; 1605 } 1606 if (Targ_Silent(gn)) { 1607 job->flags |= JOB_SILENT; 1608 } 1609 job->flags |= flags; 1610 1611 /* 1612 * Check the commands now so any attributes from .DEFAULT have a chance 1613 * to migrate to the node. 1614 */ 1615 if (!compatMake && (job->flags & JOB_FIRST)) { 1616 cmdsOK = Job_CheckCommands(gn, Error); 1617 } else { 1618 cmdsOK = TRUE; 1619 } 1620 1621 /* 1622 * If the -n flag wasn't given, we open up OUR (not the child's) 1623 * temporary file to stuff commands in it. The thing is rd/wr so we 1624 * don't need to reopen it to feed it to the shell. If the -n flag 1625 * *was* given, we just set the file to be stdout. Cute, huh? 1626 */ 1627 if ((gn->type & OP_MAKE) || (!noExecute && !touchFlag)) { 1628 /* 1629 * We're serious here, but if the commands were bogus, we're 1630 * also dead... 1631 */ 1632 if (!cmdsOK) { 1633 DieHorribly(); 1634 } 1635 1636 strcpy(tfile, TMPPAT); 1637 if ((tfd = mkstemp(tfile)) == -1) 1638 Punt("Cannot create temp file: %s", strerror(errno)); 1639 job->cmdFILE = fdopen(tfd, "w+"); 1640 eunlink(tfile); 1641 if (job->cmdFILE == NULL) { 1642 close(tfd); 1643 Punt("Could not open %s", tfile); 1644 } 1645 fcntl(FILENO(job->cmdFILE), F_SETFD, 1); 1646 /* 1647 * Send the commands to the command file, flush all its 1648 * buffers then rewind and remove the thing. 1649 */ 1650 noExec = FALSE; 1651 1652 /* 1653 * Used to be backwards; replace when start doing multiple 1654 * commands per shell. 1655 */ 1656 if (compatMake) { 1657 /* 1658 * Be compatible: If this is the first time for this 1659 * node, verify its commands are ok and open the 1660 * commands list for sequential access by later 1661 * invocations of JobStart. Once that is done, we take 1662 * the next command off the list and print it to the 1663 * command file. If the command was an ellipsis, note 1664 * that there's nothing more to execute. 1665 */ 1666 if (job->flags & JOB_FIRST) 1667 gn->compat_command = Lst_First(&gn->commands); 1668 else 1669 gn->compat_command = 1670 Lst_Succ(gn->compat_command); 1671 1672 if (gn->compat_command == NULL || 1673 JobPrintCommand(Lst_Datum(gn->compat_command), job)) 1674 noExec = TRUE; 1675 1676 if (noExec && !(job->flags & JOB_FIRST)) { 1677 /* 1678 * If we're not going to execute anything, the 1679 * job is done and we need to close down the 1680 * various file descriptors we've opened for 1681 * output, then call JobDoOutput to catch the 1682 * final characters or send the file to the 1683 * screen... Note that the i/o streams are only 1684 * open if this isn't the first job. Note also 1685 * that this could not be done in 1686 * Job_CatchChildren b/c it wasn't clear if 1687 * there were more commands to execute or not... 1688 */ 1689 JobClose(job); 1690 } 1691 } else { 1692 /* 1693 * We can do all the commands at once. hooray for sanity 1694 */ 1695 numCommands = 0; 1696 LST_FOREACH(ln, &gn->commands) { 1697 if (JobPrintCommand(Lst_Datum(ln), job)) 1698 break; 1699 } 1700 1701 /* 1702 * If we didn't print out any commands to the shell 1703 * script, there's not much point in executing the 1704 * shell, is there? 1705 */ 1706 if (numCommands == 0) { 1707 noExec = TRUE; 1708 } 1709 } 1710 1711 } else if (noExecute) { 1712 /* 1713 * Not executing anything -- just print all the commands to 1714 * stdout in one fell swoop. This will still set up 1715 * job->tailCmds correctly. 1716 */ 1717 if (lastNode != gn) { 1718 MESSAGE(stdout, gn); 1719 lastNode = gn; 1720 } 1721 job->cmdFILE = stdout; 1722 1723 /* 1724 * Only print the commands if they're ok, but don't die if 1725 * they're not -- just let the user know they're bad and keep 1726 * going. It doesn't do any harm in this case and may do 1727 * some good. 1728 */ 1729 if (cmdsOK) { 1730 LST_FOREACH(ln, &gn->commands) { 1731 if (JobPrintCommand(Lst_Datum(ln), job)) 1732 break; 1733 } 1734 } 1735 /* 1736 * Don't execute the shell, thank you. 1737 */ 1738 noExec = TRUE; 1739 1740 } else { 1741 /* 1742 * Just touch the target and note that no shell should be 1743 * executed. Set cmdFILE to stdout to make life easier. Check 1744 * the commands, too, but don't die if they're no good -- it 1745 * does no harm to keep working up the graph. 1746 */ 1747 job->cmdFILE = stdout; 1748 Job_Touch(gn, job->flags & JOB_SILENT); 1749 noExec = TRUE; 1750 } 1751 1752 /* 1753 * If we're not supposed to execute a shell, don't. 1754 */ 1755 if (noExec) { 1756 /* 1757 * Unlink and close the command file if we opened one 1758 */ 1759 if (job->cmdFILE != stdout) { 1760 if (job->cmdFILE != NULL) 1761 fclose(job->cmdFILE); 1762 } else { 1763 fflush(stdout); 1764 } 1765 1766 /* 1767 * We only want to work our way up the graph if we aren't here 1768 * because the commands for the job were no good. 1769 */ 1770 if (cmdsOK) { 1771 if (aborting == 0) { 1772 for (ln = job->tailCmds; ln != NULL; 1773 ln = LST_NEXT(ln)) { 1774 Lst_AtEnd(&postCommands->commands, 1775 Buf_Peel(Var_Subst(Lst_Datum(ln), 1776 job->node, FALSE))); 1777 } 1778 job->node->made = MADE; 1779 Make_Update(job->node); 1780 } 1781 free(job); 1782 return(JOB_FINISHED); 1783 } else { 1784 free(job); 1785 return(JOB_ERROR); 1786 } 1787 } else { 1788 fflush(job->cmdFILE); 1789 } 1790 1791 /* 1792 * Set up the control arguments to the shell. This is based on the flags 1793 * set earlier for this job. 1794 */ 1795 JobMakeArgv(job, argv); 1796 1797 /* 1798 * If we're using pipes to catch output, create the pipe by which we'll 1799 * get the shell's output. If we're using files, print out that we're 1800 * starting a job and then set up its temporary-file name. 1801 */ 1802 if (!compatMake || (job->flags & JOB_FIRST)) { 1803 if (usePipes) { 1804 int fd[2]; 1805 1806 if (pipe(fd) == -1) 1807 Punt("Cannot create pipe: %s", strerror(errno)); 1808 job->inPipe = fd[0]; 1809 job->outPipe = fd[1]; 1810 fcntl(job->inPipe, F_SETFD, 1); 1811 fcntl(job->outPipe, F_SETFD, 1); 1812 } else { 1813 fprintf(stdout, "Remaking `%s'\n", gn->name); 1814 fflush(stdout); 1815 strcpy(job->outFile, TMPPAT); 1816 if ((job->outFd = mkstemp(job->outFile)) == -1) 1817 Punt("cannot create temp file: %s", 1818 strerror(errno)); 1819 fcntl(job->outFd, F_SETFD, 1); 1820 } 1821 } 1822 1823 if (nJobs >= maxJobs && !(job->flags & JOB_SPECIAL) && maxJobs != 0) { 1824 /* 1825 * We've hit the limit of concurrency, so put the job on hold 1826 * until some other job finishes. Note that the special jobs 1827 * (.BEGIN, .INTERRUPT and .END) may be run even when the 1828 * limit has been reached (e.g. when maxJobs == 0). 1829 */ 1830 jobFull = TRUE; 1831 1832 DEBUGF(JOB, ("Can only run job locally.\n")); 1833 job->flags |= JOB_RESTART; 1834 TAILQ_INSERT_TAIL(&stoppedJobs, job, link); 1835 } else { 1836 if (nJobs >= maxJobs) { 1837 /* 1838 * If we're running this job as a special case 1839 * (see above), at least say the table is full. 1840 */ 1841 jobFull = TRUE; 1842 DEBUGF(JOB, ("Local job queue is full.\n")); 1843 } 1844 JobExec(job, argv); 1845 } 1846 return (JOB_RUNNING); 1847} 1848 1849static char * 1850JobOutput(Job *job, char *cp, char *endp, int msg) 1851{ 1852 char *ecp; 1853 1854 if (commandShell->noPrint) { 1855 ecp = strstr(cp, commandShell->noPrint); 1856 while (ecp != NULL) { 1857 if (cp != ecp) { 1858 *ecp = '\0'; 1859 if (msg && job->node != lastNode) { 1860 MESSAGE(stdout, job->node); 1861 lastNode = job->node; 1862 } 1863 /* 1864 * The only way there wouldn't be a newline 1865 * after this line is if it were the last in 1866 * the buffer. However, since the non-printable 1867 * comes after it, there must be a newline, so 1868 * we don't print one. 1869 */ 1870 fprintf(stdout, "%s", cp); 1871 fflush(stdout); 1872 } 1873 cp = ecp + strlen(commandShell->noPrint); 1874 if (cp != endp) { 1875 /* 1876 * Still more to print, look again after 1877 * skipping the whitespace following the 1878 * non-printable command.... 1879 */ 1880 cp++; 1881 while (*cp == ' ' || *cp == '\t' || 1882 *cp == '\n') { 1883 cp++; 1884 } 1885 ecp = strstr(cp, commandShell->noPrint); 1886 } else { 1887 return (cp); 1888 } 1889 } 1890 } 1891 return (cp); 1892} 1893 1894/** 1895 * JobDoOutput 1896 * This function is called at different times depending on 1897 * whether the user has specified that output is to be collected 1898 * via pipes or temporary files. In the former case, we are called 1899 * whenever there is something to read on the pipe. We collect more 1900 * output from the given job and store it in the job's outBuf. If 1901 * this makes up a line, we print it tagged by the job's identifier, 1902 * as necessary. 1903 * If output has been collected in a temporary file, we open the 1904 * file and read it line by line, transfering it to our own 1905 * output channel until the file is empty. At which point we 1906 * remove the temporary file. 1907 * In both cases, however, we keep our figurative eye out for the 1908 * 'noPrint' line for the shell from which the output came. If 1909 * we recognize a line, we don't print it. If the command is not 1910 * alone on the line (the character after it is not \0 or \n), we 1911 * do print whatever follows it. 1912 * 1913 * Side Effects: 1914 * curPos may be shifted as may the contents of outBuf. 1915 */ 1916static void 1917JobDoOutput(Job *job, Boolean finish) 1918{ 1919 Boolean gotNL = FALSE; /* true if got a newline */ 1920 Boolean fbuf; /* true if our buffer filled up */ 1921 int nr; /* number of bytes read */ 1922 int i; /* auxiliary index into outBuf */ 1923 int max; /* limit for i (end of current data) */ 1924 int nRead; /* (Temporary) number of bytes read */ 1925 FILE *oFILE; /* Stream pointer to shell's output file */ 1926 char inLine[132]; 1927 1928 if (usePipes) { 1929 /* 1930 * Read as many bytes as will fit in the buffer. 1931 */ 1932 end_loop: 1933 gotNL = FALSE; 1934 fbuf = FALSE; 1935 1936 nRead = read(job->inPipe, &job->outBuf[job->curPos], 1937 JOB_BUFSIZE - job->curPos); 1938 /* 1939 * Check for interrupt here too, because the above read may 1940 * block when the child process is stopped. In this case the 1941 * interrupt will unblock it (we don't use SA_RESTART). 1942 */ 1943 if (interrupted) 1944 JobPassSig(interrupted); 1945 1946 if (nRead < 0) { 1947 DEBUGF(JOB, ("JobDoOutput(piperead)")); 1948 nr = 0; 1949 } else { 1950 nr = nRead; 1951 } 1952 1953 /* 1954 * If we hit the end-of-file (the job is dead), we must flush 1955 * its remaining output, so pretend we read a newline if 1956 * there's any output remaining in the buffer. 1957 * Also clear the 'finish' flag so we stop looping. 1958 */ 1959 if (nr == 0 && job->curPos != 0) { 1960 job->outBuf[job->curPos] = '\n'; 1961 nr = 1; 1962 finish = FALSE; 1963 } else if (nr == 0) { 1964 finish = FALSE; 1965 } 1966 1967 /* 1968 * Look for the last newline in the bytes we just got. If there 1969 * is one, break out of the loop with 'i' as its index and 1970 * gotNL set TRUE. 1971 */ 1972 max = job->curPos + nr; 1973 for (i = job->curPos + nr - 1; i >= job->curPos; i--) { 1974 if (job->outBuf[i] == '\n') { 1975 gotNL = TRUE; 1976 break; 1977 } else if (job->outBuf[i] == '\0') { 1978 /* 1979 * Why? 1980 */ 1981 job->outBuf[i] = ' '; 1982 } 1983 } 1984 1985 if (!gotNL) { 1986 job->curPos += nr; 1987 if (job->curPos == JOB_BUFSIZE) { 1988 /* 1989 * If we've run out of buffer space, we have 1990 * no choice but to print the stuff. sigh. 1991 */ 1992 fbuf = TRUE; 1993 i = job->curPos; 1994 } 1995 } 1996 if (gotNL || fbuf) { 1997 /* 1998 * Need to send the output to the screen. Null terminate 1999 * it first, overwriting the newline character if there 2000 * was one. So long as the line isn't one we should 2001 * filter (according to the shell description), we print 2002 * the line, preceded by a target banner if this target 2003 * isn't the same as the one for which we last printed 2004 * something. The rest of the data in the buffer are 2005 * then shifted down to the start of the buffer and 2006 * curPos is set accordingly. 2007 */ 2008 job->outBuf[i] = '\0'; 2009 if (i >= job->curPos) { 2010 char *cp; 2011 2012 cp = JobOutput(job, job->outBuf, 2013 &job->outBuf[i], FALSE); 2014 2015 /* 2016 * There's still more in that buffer. This time, 2017 * though, we know there's no newline at the 2018 * end, so we add one of our own free will. 2019 */ 2020 if (*cp != '\0') { 2021 if (job->node != lastNode) { 2022 MESSAGE(stdout, job->node); 2023 lastNode = job->node; 2024 } 2025 fprintf(stdout, "%s%s", cp, 2026 gotNL ? "\n" : ""); 2027 fflush(stdout); 2028 } 2029 } 2030 if (i < max - 1) { 2031 /* shift the remaining characters down */ 2032 memcpy(job->outBuf, &job->outBuf[i + 1], 2033 max - (i + 1)); 2034 job->curPos = max - (i + 1); 2035 2036 } else { 2037 /* 2038 * We have written everything out, so we just 2039 * start over from the start of the buffer. 2040 * No copying. No nothing. 2041 */ 2042 job->curPos = 0; 2043 } 2044 } 2045 if (finish) { 2046 /* 2047 * If the finish flag is true, we must loop until we hit 2048 * end-of-file on the pipe. This is guaranteed to happen 2049 * eventually since the other end of the pipe is now 2050 * closed (we closed it explicitly and the child has 2051 * exited). When we do get an EOF, finish will be set 2052 * FALSE and we'll fall through and out. 2053 */ 2054 goto end_loop; 2055 } 2056 2057 } else { 2058 /* 2059 * We've been called to retrieve the output of the job from the 2060 * temporary file where it's been squirreled away. This consists 2061 * of opening the file, reading the output line by line, being 2062 * sure not to print the noPrint line for the shell we used, 2063 * then close and remove the temporary file. Very simple. 2064 * 2065 * Change to read in blocks and do FindSubString type things 2066 * as for pipes? That would allow for "@echo -n..." 2067 */ 2068 oFILE = fopen(job->outFile, "r"); 2069 if (oFILE != NULL) { 2070 fprintf(stdout, "Results of making %s:\n", 2071 job->node->name); 2072 fflush(stdout); 2073 2074 while (fgets(inLine, sizeof(inLine), oFILE) != NULL) { 2075 char *cp, *endp, *oendp; 2076 2077 cp = inLine; 2078 oendp = endp = inLine + strlen(inLine); 2079 if (endp[-1] == '\n') { 2080 *--endp = '\0'; 2081 } 2082 cp = JobOutput(job, inLine, endp, FALSE); 2083 2084 /* 2085 * There's still more in that buffer. This time, 2086 * though, we know there's no newline at the 2087 * end, so we add one of our own free will. 2088 */ 2089 fprintf(stdout, "%s", cp); 2090 fflush(stdout); 2091 if (endp != oendp) { 2092 fprintf(stdout, "\n"); 2093 fflush(stdout); 2094 } 2095 } 2096 fclose(oFILE); 2097 eunlink(job->outFile); 2098 } 2099 } 2100} 2101 2102/** 2103 * Job_CatchChildren 2104 * Handle the exit of a child. Called from Make_Make. 2105 * 2106 * Side Effects: 2107 * The job descriptor is removed from the list of children. 2108 * 2109 * Notes: 2110 * We do waits, blocking or not, according to the wisdom of our 2111 * caller, until there are no more children to report. For each 2112 * job, call JobFinish to finish things off. This will take care of 2113 * putting jobs on the stoppedJobs queue. 2114 */ 2115void 2116Job_CatchChildren(Boolean block) 2117{ 2118 pid_t pid; /* pid of dead child */ 2119 Job *job; /* job descriptor for dead child */ 2120 int status; /* Exit/termination status */ 2121 2122 /* 2123 * Don't even bother if we know there's no one around. 2124 */ 2125 if (nJobs == 0) { 2126 return; 2127 } 2128 2129 for (;;) { 2130 pid = waitpid((pid_t)-1, &status, 2131 (block ? 0 : WNOHANG) | WUNTRACED); 2132 if (pid <= 0) 2133 break; 2134 2135 DEBUGF(JOB, ("Process %jd exited or stopped.\n", 2136 (intmax_t)pid)); 2137 2138 TAILQ_FOREACH(job, &jobs, link) { 2139 if (job->pid == pid) 2140 break; 2141 } 2142 2143 if (job == NULL) { 2144 if (WIFSIGNALED(status) && 2145 (WTERMSIG(status) == SIGCONT)) { 2146 TAILQ_FOREACH(job, &jobs, link) { 2147 if (job->pid == pid) 2148 break; 2149 } 2150 if (job == NULL) { 2151 Error("Resumed child (%jd) " 2152 "not in table", (intmax_t)pid); 2153 continue; 2154 } 2155 TAILQ_REMOVE(&stoppedJobs, job, link); 2156 } else { 2157 Error("Child (%jd) not in table?", 2158 (intmax_t)pid); 2159 continue; 2160 } 2161 } else { 2162 TAILQ_REMOVE(&jobs, job, link); 2163 nJobs -= 1; 2164 if (fifoFd >= 0 && maxJobs > 1) { 2165 write(fifoFd, "+", 1); 2166 maxJobs--; 2167 if (nJobs >= maxJobs) 2168 jobFull = TRUE; 2169 else 2170 jobFull = FALSE; 2171 } else { 2172 DEBUGF(JOB, ("Job queue is no longer full.\n")); 2173 jobFull = FALSE; 2174 } 2175 } 2176 2177 JobFinish(job, &status); 2178 } 2179 if (interrupted) 2180 JobPassSig(interrupted); 2181} 2182 2183/** 2184 * Job_CatchOutput 2185 * Catch the output from our children, if we're using 2186 * pipes do so. Otherwise just block time until we get a 2187 * signal(most likely a SIGCHLD) since there's no point in 2188 * just spinning when there's nothing to do and the reaping 2189 * of a child can wait for a while. 2190 * 2191 * Side Effects: 2192 * Output is read from pipes if we're piping. 2193 * ----------------------------------------------------------------------- 2194 */ 2195void 2196#ifdef USE_KQUEUE 2197Job_CatchOutput(int flag __unused) 2198#else 2199Job_CatchOutput(int flag) 2200#endif 2201{ 2202 int nfds; 2203#ifdef USE_KQUEUE 2204#define KEV_SIZE 4 2205 struct kevent kev[KEV_SIZE]; 2206 int i; 2207#else 2208 struct timeval timeout; 2209 fd_set readfds; 2210 Job *job; 2211#endif 2212 2213 fflush(stdout); 2214 2215 if (usePipes) { 2216#ifdef USE_KQUEUE 2217 if ((nfds = kevent(kqfd, NULL, 0, kev, KEV_SIZE, NULL)) == -1) { 2218 if (errno != EINTR) 2219 Punt("kevent: %s", strerror(errno)); 2220 if (interrupted) 2221 JobPassSig(interrupted); 2222 } else { 2223 for (i = 0; i < nfds; i++) { 2224 if (kev[i].flags & EV_ERROR) { 2225 warnc(kev[i].data, "kevent"); 2226 continue; 2227 } 2228 switch (kev[i].filter) { 2229 case EVFILT_READ: 2230 JobDoOutput(kev[i].udata, FALSE); 2231 break; 2232 case EVFILT_PROC: 2233 /* 2234 * Just wake up and let 2235 * Job_CatchChildren() collect the 2236 * terminated job. 2237 */ 2238 break; 2239 } 2240 } 2241 } 2242#else 2243 readfds = outputs; 2244 timeout.tv_sec = SEL_SEC; 2245 timeout.tv_usec = SEL_USEC; 2246 if (flag && jobFull && fifoFd >= 0) 2247 FD_SET(fifoFd, &readfds); 2248 2249 nfds = select(FD_SETSIZE, &readfds, (fd_set *)NULL, 2250 (fd_set *)NULL, &timeout); 2251 if (nfds <= 0) { 2252 if (interrupted) 2253 JobPassSig(interrupted); 2254 return; 2255 } 2256 if (fifoFd >= 0 && FD_ISSET(fifoFd, &readfds)) { 2257 if (--nfds <= 0) 2258 return; 2259 } 2260 job = TAILQ_FIRST(&jobs); 2261 while (nfds != 0 && job != NULL) { 2262 if (FD_ISSET(job->inPipe, &readfds)) { 2263 JobDoOutput(job, FALSE); 2264 nfds--; 2265 } 2266 job = TAILQ_NEXT(job, link); 2267 } 2268#endif /* !USE_KQUEUE */ 2269 } 2270} 2271 2272/** 2273 * Job_Make 2274 * Start the creation of a target. Basically a front-end for 2275 * JobStart used by the Make module. 2276 * 2277 * Side Effects: 2278 * Another job is started. 2279 */ 2280void 2281Job_Make(GNode *gn) 2282{ 2283 2284 JobStart(gn, 0, NULL); 2285} 2286 2287/** 2288 * Job_Init 2289 * Initialize the process module, given a maximum number of jobs. 2290 * 2291 * Side Effects: 2292 * lists and counters are initialized 2293 */ 2294void 2295Job_Init(int maxproc) 2296{ 2297 GNode *begin; /* node for commands to do at the very start */ 2298 const char *env; 2299 struct sigaction sa; 2300 2301 fifoFd = -1; 2302 env = getenv("MAKE_JOBS_FIFO"); 2303 2304 if (env == NULL && maxproc > 1) { 2305 /* 2306 * We did not find the environment variable so we are the 2307 * leader. Create the fifo, open it, write one char per 2308 * allowed job into the pipe. 2309 */ 2310 fifoFd = mkfifotemp(fifoName); 2311 if (fifoFd < 0) { 2312 env = NULL; 2313 } else { 2314 fifoMaster = 1; 2315 fcntl(fifoFd, F_SETFL, O_NONBLOCK); 2316 env = fifoName; 2317 setenv("MAKE_JOBS_FIFO", env, 1); 2318 while (maxproc-- > 0) { 2319 write(fifoFd, "+", 1); 2320 } 2321 /* The master make does not get a magic token */ 2322 jobFull = TRUE; 2323 maxJobs = 0; 2324 } 2325 2326 } else if (env != NULL) { 2327 /* 2328 * We had the environment variable so we are a slave. 2329 * Open fifo and give ourselves a magic token which represents 2330 * the token our parent make has grabbed to start his make 2331 * process. Otherwise the sub-makes would gobble up tokens and 2332 * the proper number of tokens to specify to -j would depend 2333 * on the depth of the tree and the order of execution. 2334 */ 2335 fifoFd = open(env, O_RDWR, 0); 2336 if (fifoFd >= 0) { 2337 fcntl(fifoFd, F_SETFL, O_NONBLOCK); 2338 maxJobs = 1; 2339 jobFull = FALSE; 2340 } 2341 } 2342 if (fifoFd < 0) { 2343 maxJobs = maxproc; 2344 jobFull = FALSE; 2345 } else { 2346 } 2347 nJobs = 0; 2348 2349 aborting = 0; 2350 errors = 0; 2351 2352 lastNode = NULL; 2353 2354 if ((maxJobs == 1 && fifoFd < 0) || beVerbose == 0) { 2355 /* 2356 * If only one job can run at a time, there's no need for a 2357 * banner, no is there? 2358 */ 2359 targFmt = ""; 2360 } else { 2361 targFmt = TARG_FMT; 2362 } 2363 2364 /* 2365 * Catch the four signals that POSIX specifies if they aren't ignored. 2366 * JobCatchSignal will just set global variables and hope someone 2367 * else is going to handle the interrupt. 2368 */ 2369 sa.sa_handler = JobCatchSig; 2370 sigemptyset(&sa.sa_mask); 2371 sa.sa_flags = 0; 2372 2373 if (signal(SIGINT, SIG_IGN) != SIG_IGN) { 2374 sigaction(SIGINT, &sa, NULL); 2375 } 2376 if (signal(SIGHUP, SIG_IGN) != SIG_IGN) { 2377 sigaction(SIGHUP, &sa, NULL); 2378 } 2379 if (signal(SIGQUIT, SIG_IGN) != SIG_IGN) { 2380 sigaction(SIGQUIT, &sa, NULL); 2381 } 2382 if (signal(SIGTERM, SIG_IGN) != SIG_IGN) { 2383 sigaction(SIGTERM, &sa, NULL); 2384 } 2385 /* 2386 * There are additional signals that need to be caught and passed if 2387 * either the export system wants to be told directly of signals or if 2388 * we're giving each job its own process group (since then it won't get 2389 * signals from the terminal driver as we own the terminal) 2390 */ 2391#if defined(USE_PGRP) 2392 if (signal(SIGTSTP, SIG_IGN) != SIG_IGN) { 2393 sigaction(SIGTSTP, &sa, NULL); 2394 } 2395 if (signal(SIGTTOU, SIG_IGN) != SIG_IGN) { 2396 sigaction(SIGTTOU, &sa, NULL); 2397 } 2398 if (signal(SIGTTIN, SIG_IGN) != SIG_IGN) { 2399 sigaction(SIGTTIN, &sa, NULL); 2400 } 2401 if (signal(SIGWINCH, SIG_IGN) != SIG_IGN) { 2402 sigaction(SIGWINCH, &sa, NULL); 2403 } 2404#endif 2405 2406#ifdef USE_KQUEUE 2407 if ((kqfd = kqueue()) == -1) { 2408 Punt("kqueue: %s", strerror(errno)); 2409 } 2410#endif 2411 2412 begin = Targ_FindNode(".BEGIN", TARG_NOCREATE); 2413 2414 if (begin != NULL) { 2415 JobStart(begin, JOB_SPECIAL, (Job *)NULL); 2416 while (nJobs) { 2417 Job_CatchOutput(0); 2418 Job_CatchChildren(!usePipes); 2419 } 2420 } 2421 postCommands = Targ_FindNode(".END", TARG_CREATE); 2422} 2423 2424/** 2425 * Job_Full 2426 * See if the job table is full. It is considered full if it is OR 2427 * if we are in the process of aborting OR if we have 2428 * reached/exceeded our local quota. This prevents any more jobs 2429 * from starting up. 2430 * 2431 * Results: 2432 * TRUE if the job table is full, FALSE otherwise 2433 */ 2434Boolean 2435Job_Full(void) 2436{ 2437 char c; 2438 int i; 2439 2440 if (aborting) 2441 return (aborting); 2442 if (fifoFd >= 0 && jobFull) { 2443 i = read(fifoFd, &c, 1); 2444 if (i > 0) { 2445 maxJobs++; 2446 jobFull = FALSE; 2447 } 2448 } 2449 return (jobFull); 2450} 2451 2452/** 2453 * Job_Empty 2454 * See if the job table is empty. Because the local concurrency may 2455 * be set to 0, it is possible for the job table to become empty, 2456 * while the list of stoppedJobs remains non-empty. In such a case, 2457 * we want to restart as many jobs as we can. 2458 * 2459 * Results: 2460 * TRUE if it is. FALSE if it ain't. 2461 */ 2462Boolean 2463Job_Empty(void) 2464{ 2465 if (nJobs == 0) { 2466 if (!TAILQ_EMPTY(&stoppedJobs) && !aborting) { 2467 /* 2468 * The job table is obviously not full if it has no 2469 * jobs in it...Try and restart the stopped jobs. 2470 */ 2471 jobFull = FALSE; 2472 JobRestartJobs(); 2473 return (FALSE); 2474 } else { 2475 return (TRUE); 2476 } 2477 } else { 2478 return (FALSE); 2479 } 2480} 2481 2482/** 2483 * JobInterrupt 2484 * Handle the receipt of an interrupt. 2485 * 2486 * Side Effects: 2487 * All children are killed. Another job will be started if the 2488 * .INTERRUPT target was given. 2489 */ 2490static void 2491JobInterrupt(int runINTERRUPT, int signo) 2492{ 2493 Job *job; /* job descriptor in that element */ 2494 GNode *interrupt; /* the node describing the .INTERRUPT target */ 2495 2496 aborting = ABORT_INTERRUPT; 2497 2498 TAILQ_FOREACH(job, &jobs, link) { 2499 if (!Targ_Precious(job->node)) { 2500 char *file = (job->node->path == NULL ? 2501 job->node->name : job->node->path); 2502 2503 if (!noExecute && eunlink(file) != -1) { 2504 Error("*** %s removed", file); 2505 } 2506 } 2507 if (job->pid) { 2508 DEBUGF(JOB, ("JobInterrupt passing signal to child " 2509 "%jd.\n", (intmax_t)job->pid)); 2510 KILL(job->pid, signo); 2511 } 2512 } 2513 2514 if (runINTERRUPT && !touchFlag) { 2515 /* 2516 * clear the interrupted flag because we would get an 2517 * infinite loop otherwise. 2518 */ 2519 interrupted = 0; 2520 2521 interrupt = Targ_FindNode(".INTERRUPT", TARG_NOCREATE); 2522 if (interrupt != NULL) { 2523 ignoreErrors = FALSE; 2524 2525 JobStart(interrupt, JOB_IGNDOTS, (Job *)NULL); 2526 while (nJobs) { 2527 Job_CatchOutput(0); 2528 Job_CatchChildren(!usePipes); 2529 } 2530 } 2531 } 2532 if (fifoMaster) 2533 unlink(fifoName); 2534} 2535 2536/** 2537 * Job_Finish 2538 * Do final processing such as the running of the commands 2539 * attached to the .END target. 2540 * 2541 * Results: 2542 * Number of errors reported. 2543 */ 2544int 2545Job_Finish(void) 2546{ 2547 2548 if (postCommands != NULL && !Lst_IsEmpty(&postCommands->commands)) { 2549 if (errors) { 2550 Error("Errors reported so .END ignored"); 2551 } else { 2552 JobStart(postCommands, JOB_SPECIAL | JOB_IGNDOTS, NULL); 2553 2554 while (nJobs) { 2555 Job_CatchOutput(0); 2556 Job_CatchChildren(!usePipes); 2557 } 2558 } 2559 } 2560 if (fifoFd >= 0) { 2561 close(fifoFd); 2562 fifoFd = -1; 2563 if (fifoMaster) 2564 unlink(fifoName); 2565 } 2566 return (errors); 2567} 2568 2569/** 2570 * Job_Wait 2571 * Waits for all running jobs to finish and returns. Sets 'aborting' 2572 * to ABORT_WAIT to prevent other jobs from starting. 2573 * 2574 * Side Effects: 2575 * Currently running jobs finish. 2576 */ 2577void 2578Job_Wait(void) 2579{ 2580 2581 aborting = ABORT_WAIT; 2582 while (nJobs != 0) { 2583 Job_CatchOutput(0); 2584 Job_CatchChildren(!usePipes); 2585 } 2586 aborting = 0; 2587} 2588 2589/** 2590 * Job_AbortAll 2591 * Abort all currently running jobs without handling output or anything. 2592 * This function is to be called only in the event of a major 2593 * error. Most definitely NOT to be called from JobInterrupt. 2594 * 2595 * Side Effects: 2596 * All children are killed, not just the firstborn 2597 */ 2598void 2599Job_AbortAll(void) 2600{ 2601 Job *job; /* the job descriptor in that element */ 2602 int foo; 2603 2604 aborting = ABORT_ERROR; 2605 2606 if (nJobs) { 2607 TAILQ_FOREACH(job, &jobs, link) { 2608 /* 2609 * kill the child process with increasingly drastic 2610 * signals to make darn sure it's dead. 2611 */ 2612 KILL(job->pid, SIGINT); 2613 KILL(job->pid, SIGKILL); 2614 } 2615 } 2616 2617 /* 2618 * Catch as many children as want to report in at first, then give up 2619 */ 2620 while (waitpid((pid_t)-1, &foo, WNOHANG) > 0) 2621 ; 2622} 2623 2624/** 2625 * JobRestartJobs 2626 * Tries to restart stopped jobs if there are slots available. 2627 * Note that this tries to restart them regardless of pending errors. 2628 * It's not good to leave stopped jobs lying around! 2629 * 2630 * Side Effects: 2631 * Resumes(and possibly migrates) jobs. 2632 */ 2633static void 2634JobRestartJobs(void) 2635{ 2636 Job *job; 2637 2638 while (!jobFull && (job = TAILQ_FIRST(&stoppedJobs)) != NULL) { 2639 DEBUGF(JOB, ("Job queue is not full. " 2640 "Restarting a stopped job.\n")); 2641 TAILQ_REMOVE(&stoppedJobs, job, link); 2642 JobRestart(job); 2643 } 2644} 2645 2646/** 2647 * Cmd_Exec 2648 * Execute the command in cmd, and return the output of that command 2649 * in a string. 2650 * 2651 * Results: 2652 * A string containing the output of the command, or the empty string 2653 * If error is not NULL, it contains the reason for the command failure 2654 * Any output sent to stderr in the child process is passed to stderr, 2655 * and not captured in the string. 2656 * 2657 * Side Effects: 2658 * The string must be freed by the caller. 2659 */ 2660Buffer * 2661Cmd_Exec(const char *cmd, const char **error) 2662{ 2663 int fds[2]; /* Pipe streams */ 2664 int status; /* command exit status */ 2665 Buffer *buf; /* buffer to store the result */ 2666 ssize_t rcnt; 2667 ProcStuff ps; 2668 2669 *error = NULL; 2670 buf = Buf_Init(0); 2671 2672 /* 2673 * Open a pipe for fetching its output 2674 */ 2675 if (pipe(fds) == -1) { 2676 *error = "Couldn't create pipe for \"%s\""; 2677 return (buf); 2678 } 2679 2680 /* Set close-on-exec on read side of pipe. */ 2681 fcntl(fds[0], F_SETFD, fcntl(fds[0], F_GETFD) | FD_CLOEXEC); 2682 2683 ps.in = STDIN_FILENO; 2684 ps.out = fds[1]; 2685 ps.err = STDERR_FILENO; 2686 2687 ps.merge_errors = 0; 2688 ps.pgroup = 0; 2689 ps.searchpath = 0; 2690 2691 /* Set up arguments for shell */ 2692 ps.argv = emalloc(4 * sizeof(char *)); 2693 ps.argv[0] = strdup(commandShell->name); 2694 ps.argv[1] = strdup("-c"); 2695 ps.argv[2] = strdup(cmd); 2696 ps.argv[3] = NULL; 2697 ps.argv_free = 1; 2698 2699 /* 2700 * Fork. Warning since we are doing vfork() instead of fork(), 2701 * do not allocate memory in the child process! 2702 */ 2703 if ((ps.child_pid = vfork()) == -1) { 2704 *error = "Couldn't exec \"%s\""; 2705 return (buf); 2706 2707 } else if (ps.child_pid == 0) { 2708 /* 2709 * Child 2710 */ 2711 Proc_Exec(&ps); 2712 /* NOTREACHED */ 2713 } 2714 2715 free(ps.argv[2]); 2716 free(ps.argv[1]); 2717 free(ps.argv[0]); 2718 free(ps.argv); 2719 2720 close(fds[1]); /* No need for the writing half of the pipe. */ 2721 2722 do { 2723 char result[BUFSIZ]; 2724 2725 rcnt = read(fds[0], result, sizeof(result)); 2726 if (rcnt != -1) 2727 Buf_AddBytes(buf, (size_t)rcnt, (Byte *)result); 2728 } while (rcnt > 0 || (rcnt == -1 && errno == EINTR)); 2729 2730 if (rcnt == -1) 2731 *error = "Error reading shell's output for \"%s\""; 2732 2733 /* 2734 * Close the input side of the pipe. 2735 */ 2736 close(fds[0]); 2737 2738 status = ProcWait(&ps); 2739 2740 if (status) 2741 *error = "\"%s\" returned non-zero status"; 2742 2743 Buf_StripNewlines(buf); 2744 2745 return (buf); 2746} 2747 2748 2749/* 2750 * Interrupt handler - set flag and defer handling to the main code 2751 */ 2752static void 2753CompatCatchSig(int signo) 2754{ 2755 2756 interrupted = signo; 2757} 2758 2759/*- 2760 *----------------------------------------------------------------------- 2761 * CompatInterrupt -- 2762 * Interrupt the creation of the current target and remove it if 2763 * it ain't precious. 2764 * 2765 * Results: 2766 * None. 2767 * 2768 * Side Effects: 2769 * The target is removed and the process exits. If .INTERRUPT exists, 2770 * its commands are run first WITH INTERRUPTS IGNORED.. 2771 * 2772 *----------------------------------------------------------------------- 2773 */ 2774static void 2775CompatInterrupt(int signo) 2776{ 2777 GNode *gn; 2778 sigset_t nmask, omask; 2779 LstNode *ln; 2780 2781 sigemptyset(&nmask); 2782 sigaddset(&nmask, SIGINT); 2783 sigaddset(&nmask, SIGTERM); 2784 sigaddset(&nmask, SIGHUP); 2785 sigaddset(&nmask, SIGQUIT); 2786 sigprocmask(SIG_SETMASK, &nmask, &omask); 2787 2788 /* prevent recursion in evaluation of .INTERRUPT */ 2789 interrupted = 0; 2790 2791 if (curTarg != NULL && !Targ_Precious(curTarg)) { 2792 const char *file = Var_Value(TARGET, curTarg); 2793 2794 if (!noExecute && eunlink(file) != -1) { 2795 printf("*** %s removed\n", file); 2796 } 2797 } 2798 2799 /* 2800 * Run .INTERRUPT only if hit with interrupt signal 2801 */ 2802 if (signo == SIGINT) { 2803 gn = Targ_FindNode(".INTERRUPT", TARG_NOCREATE); 2804 if (gn != NULL) { 2805 LST_FOREACH(ln, &gn->commands) { 2806 if (Compat_RunCommand(Lst_Datum(ln), gn)) 2807 break; 2808 } 2809 } 2810 } 2811 2812 sigprocmask(SIG_SETMASK, &omask, NULL); 2813 2814 if (signo == SIGQUIT) 2815 exit(signo); 2816 signal(signo, SIG_DFL); 2817 kill(getpid(), signo); 2818} 2819 2820/** 2821 * shellneed 2822 * 2823 * Results: 2824 * Returns NULL if a specified line must be executed by the shell, 2825 * and an argument vector if it can be run via execvp(). 2826 * 2827 * Side Effects: 2828 * Uses brk_string so destroys the contents of argv. 2829 */ 2830static char ** 2831shellneed(ArgArray *aa, char *cmd) 2832{ 2833 char **p; 2834 int ret; 2835 2836 if (commandShell->meta == NULL || commandShell->builtins.argc <= 1) 2837 /* use shell */ 2838 return (NULL); 2839 2840 if (strpbrk(cmd, commandShell->meta) != NULL) 2841 return (NULL); 2842 2843 /* 2844 * Break the command into words to form an argument 2845 * vector we can execute. 2846 */ 2847 brk_string(aa, cmd, TRUE); 2848 for (p = commandShell->builtins.argv + 1; *p != 0; p++) { 2849 if ((ret = strcmp(aa->argv[1], *p)) == 0) { 2850 /* found - use shell */ 2851 ArgArray_Done(aa); 2852 return (NULL); 2853 } 2854 if (ret < 0) { 2855 /* not found */ 2856 break; 2857 } 2858 } 2859 return (aa->argv + 1); 2860} 2861 2862/** 2863 * Execute the next command for a target. If the command returns an 2864 * error, the node's made field is set to ERROR and creation stops. 2865 * The node from which the command came is also given. This is used 2866 * to execute the commands in compat mode and when executing commands 2867 * with the '+' flag in non-compat mode. In these modes each command 2868 * line should be executed by its own shell. We do some optimisation here: 2869 * if the shell description defines both a string of meta characters and 2870 * a list of builtins and the command line neither contains a meta character 2871 * nor starts with one of the builtins then we execute the command directly 2872 * without invoking a shell. 2873 * 2874 * Results: 2875 * 0 if the command succeeded, 1 if an error occurred. 2876 * 2877 * Side Effects: 2878 * The node's 'made' field may be set to ERROR. 2879 */ 2880static int 2881Compat_RunCommand(char *cmd, GNode *gn) 2882{ 2883 ArgArray aa; 2884 char *cmdStart; /* Start of expanded command */ 2885 Boolean silent; /* Don't print command */ 2886 Boolean doit; /* Execute even in -n */ 2887 Boolean errCheck; /* Check errors */ 2888 int reason; /* Reason for child's death */ 2889 int status; /* Description of child's death */ 2890 LstNode *cmdNode; /* Node where current cmd is located */ 2891 char **av; /* Argument vector for thing to exec */ 2892 ProcStuff ps; 2893 2894 silent = gn->type & OP_SILENT; 2895 errCheck = !(gn->type & OP_IGNORE); 2896 doit = FALSE; 2897 2898 cmdNode = Lst_Member(&gn->commands, cmd); 2899 cmdStart = Buf_Peel(Var_Subst(cmd, gn, FALSE)); 2900 2901 /* 2902 * brk_string will return an argv with a NULL in av[0], thus causing 2903 * execvp() to choke and die horribly. Besides, how can we execute a 2904 * null command? In any case, we warn the user that the command 2905 * expanded to nothing (is this the right thing to do?). 2906 */ 2907 if (*cmdStart == '\0') { 2908 free(cmdStart); 2909 Error("%s expands to empty string", cmd); 2910 return (0); 2911 } else { 2912 cmd = cmdStart; 2913 } 2914 Lst_Replace(cmdNode, cmdStart); 2915 2916 if ((gn->type & OP_SAVE_CMDS) && (gn != ENDNode)) { 2917 Lst_AtEnd(&ENDNode->commands, cmdStart); 2918 return (0); 2919 } else if (strcmp(cmdStart, "...") == 0) { 2920 gn->type |= OP_SAVE_CMDS; 2921 return (0); 2922 } 2923 2924 while (*cmd == '@' || *cmd == '-' || *cmd == '+') { 2925 switch (*cmd) { 2926 2927 case '@': 2928 silent = DEBUG(LOUD) ? FALSE : TRUE; 2929 break; 2930 2931 case '-': 2932 errCheck = FALSE; 2933 break; 2934 2935 case '+': 2936 doit = TRUE; 2937 break; 2938 } 2939 cmd++; 2940 } 2941 2942 while (isspace((unsigned char)*cmd)) 2943 cmd++; 2944 2945 /* 2946 * Print the command before echoing if we're not supposed to be quiet 2947 * for this one. We also print the command if -n given, but not if '+'. 2948 */ 2949 if (!silent || (noExecute && !doit)) { 2950 printf("%s\n", cmd); 2951 fflush(stdout); 2952 } 2953 2954 /* 2955 * If we're not supposed to execute any commands, this is as far as 2956 * we go... 2957 */ 2958 if (!doit && noExecute) { 2959 return (0); 2960 } 2961 2962 ps.in = STDIN_FILENO; 2963 ps.out = STDOUT_FILENO; 2964 ps.err = STDERR_FILENO; 2965 2966 ps.merge_errors = 0; 2967 ps.pgroup = 0; 2968 ps.searchpath = 1; 2969 2970 if ((av = shellneed(&aa, cmd)) == NULL) { 2971 /* 2972 * Shell meta character or shell builtin found - pass 2973 * command to shell. We give the shell the -e flag as 2974 * well as -c if it is supposed to exit when it hits an error. 2975 */ 2976 ps.argv = emalloc(4 * sizeof(char *)); 2977 ps.argv[0] = strdup(commandShell->path); 2978 ps.argv[1] = strdup(errCheck ? "-ec" : "-c"); 2979 ps.argv[2] = strdup(cmd); 2980 ps.argv[3] = NULL; 2981 ps.argv_free = 1; 2982 } else { 2983 ps.argv = av; 2984 ps.argv_free = 0; 2985 } 2986 ps.errCheck = errCheck; 2987 2988 /* 2989 * Warning since we are doing vfork() instead of fork(), 2990 * do not allocate memory in the child process! 2991 */ 2992 if ((ps.child_pid = vfork()) == -1) { 2993 Fatal("Could not fork"); 2994 2995 } else if (ps.child_pid == 0) { 2996 /* 2997 * Child 2998 */ 2999 Proc_Exec(&ps); 3000 /* NOTREACHED */ 3001 3002 } else { 3003 if (ps.argv_free) { 3004 free(ps.argv[2]); 3005 free(ps.argv[1]); 3006 free(ps.argv[0]); 3007 free(ps.argv); 3008 } else { 3009 ArgArray_Done(&aa); 3010 } 3011 3012 /* 3013 * we need to print out the command associated with this 3014 * Gnode in Targ_PrintCmd from Targ_PrintGraph when debugging 3015 * at level g2, in main(), Fatal() and DieHorribly(), 3016 * therefore do not free it when debugging. 3017 */ 3018 if (!DEBUG(GRAPH2)) { 3019 free(cmdStart); 3020 } 3021 3022 /* 3023 * The child is off and running. Now all we can do is wait... 3024 */ 3025 reason = ProcWait(&ps); 3026 3027 if (interrupted) 3028 CompatInterrupt(interrupted); 3029 3030 /* 3031 * Decode and report the reason child exited, then 3032 * indicate how we handled it. 3033 */ 3034 if (WIFEXITED(reason)) { 3035 status = WEXITSTATUS(reason); 3036 if (status == 0) { 3037 return (0); 3038 } else { 3039 printf("*** Error code %d", status); 3040 } 3041 } else if (WIFSTOPPED(reason)) { 3042 status = WSTOPSIG(reason); 3043 } else { 3044 status = WTERMSIG(reason); 3045 printf("*** Signal %d", status); 3046 } 3047 3048 if (ps.errCheck) { 3049 gn->made = ERROR; 3050 if (keepgoing) { 3051 /* 3052 * Abort the current 3053 * target, but let 3054 * others continue. 3055 */ 3056 printf(" (continuing)\n"); 3057 } 3058 return (status); 3059 } else { 3060 /* 3061 * Continue executing 3062 * commands for this target. 3063 * If we return 0, this will 3064 * happen... 3065 */ 3066 printf(" (ignored)\n"); 3067 return (0); 3068 } 3069 } 3070} 3071 3072/*- 3073 *----------------------------------------------------------------------- 3074 * Compat_Make -- 3075 * Make a target, given the parent, to abort if necessary. 3076 * 3077 * Side Effects: 3078 * If an error is detected and not being ignored, the process exits. 3079 * 3080 *----------------------------------------------------------------------- 3081 */ 3082int 3083Compat_Make(GNode *gn, GNode *pgn) 3084{ 3085 LstNode *ln; 3086 3087 if (gn->type & OP_USE) { 3088 Make_HandleUse(gn, pgn); 3089 3090 } else if (gn->made == UNMADE) { 3091 /* 3092 * First mark ourselves to be made, then apply whatever 3093 * transformations the suffix module thinks are necessary. 3094 * Once that's done, we can descend and make all our children. 3095 * If any of them has an error but the -k flag was given, our 3096 * 'make' field will be set FALSE again. This is our signal to 3097 * not attempt to do anything but abort our parent as well. 3098 */ 3099 gn->make = TRUE; 3100 gn->made = BEINGMADE; 3101 Suff_FindDeps(gn); 3102 LST_FOREACH(ln, &gn->children) 3103 Compat_Make(Lst_Datum(ln), gn); 3104 if (!gn->make) { 3105 gn->made = ABORTED; 3106 pgn->make = FALSE; 3107 return (0); 3108 } 3109 3110 if (Lst_Member(&gn->iParents, pgn) != NULL) { 3111 Var_Set(IMPSRC, Var_Value(TARGET, gn), pgn); 3112 } 3113 3114 /* 3115 * All the children were made ok. Now cmtime contains the 3116 * modification time of the newest child, we need to find out 3117 * if we exist and when we were modified last. The criteria for 3118 * datedness are defined by the Make_OODate function. 3119 */ 3120 DEBUGF(MAKE, ("Examining %s...", gn->name)); 3121 if (!Make_OODate(gn)) { 3122 gn->made = UPTODATE; 3123 DEBUGF(MAKE, ("up-to-date.\n")); 3124 return (0); 3125 } else { 3126 DEBUGF(MAKE, ("out-of-date.\n")); 3127 } 3128 3129 /* 3130 * If the user is just seeing if something is out-of-date, 3131 * exit now to tell him/her "yes". 3132 */ 3133 if (queryFlag) { 3134 exit(1); 3135 } 3136 3137 /* 3138 * We need to be re-made. We also have to make sure we've got 3139 * a $? variable. To be nice, we also define the $> variable 3140 * using Make_DoAllVar(). 3141 */ 3142 Make_DoAllVar(gn); 3143 3144 /* 3145 * Alter our type to tell if errors should be ignored or things 3146 * should not be printed so Compat_RunCommand knows what to do. 3147 */ 3148 if (Targ_Ignore(gn)) { 3149 gn->type |= OP_IGNORE; 3150 } 3151 if (Targ_Silent(gn)) { 3152 gn->type |= OP_SILENT; 3153 } 3154 3155 if (Job_CheckCommands(gn, Fatal)) { 3156 /* 3157 * Our commands are ok, but we still have to worry 3158 * about the -t flag... 3159 */ 3160 if (!touchFlag) { 3161 curTarg = gn; 3162 LST_FOREACH(ln, &gn->commands) { 3163 if (Compat_RunCommand(Lst_Datum(ln), 3164 gn)) 3165 break; 3166 } 3167 curTarg = NULL; 3168 } else { 3169 Job_Touch(gn, gn->type & OP_SILENT); 3170 } 3171 } else { 3172 gn->made = ERROR; 3173 } 3174 3175 if (gn->made != ERROR) { 3176 /* 3177 * If the node was made successfully, mark it so, update 3178 * its modification time and timestamp all its parents. 3179 * Note that for .ZEROTIME targets, the timestamping 3180 * isn't done. This is to keep its state from affecting 3181 * that of its parent. 3182 */ 3183 gn->made = MADE; 3184#ifndef RECHECK 3185 /* 3186 * We can't re-stat the thing, but we can at least take 3187 * care of rules where a target depends on a source that 3188 * actually creates the target, but only if it has 3189 * changed, e.g. 3190 * 3191 * parse.h : parse.o 3192 * 3193 * parse.o : parse.y 3194 * yacc -d parse.y 3195 * cc -c y.tab.c 3196 * mv y.tab.o parse.o 3197 * cmp -s y.tab.h parse.h || mv y.tab.h parse.h 3198 * 3199 * In this case, if the definitions produced by yacc 3200 * haven't changed from before, parse.h won't have been 3201 * updated and gn->mtime will reflect the current 3202 * modification time for parse.h. This is something of a 3203 * kludge, I admit, but it's a useful one.. 3204 * 3205 * XXX: People like to use a rule like 3206 * 3207 * FRC: 3208 * 3209 * To force things that depend on FRC to be made, so we 3210 * have to check for gn->children being empty as well... 3211 */ 3212 if (!Lst_IsEmpty(&gn->commands) || 3213 Lst_IsEmpty(&gn->children)) { 3214 gn->mtime = now; 3215 } 3216#else 3217 /* 3218 * This is what Make does and it's actually a good 3219 * thing, as it allows rules like 3220 * 3221 * cmp -s y.tab.h parse.h || cp y.tab.h parse.h 3222 * 3223 * to function as intended. Unfortunately, thanks to 3224 * the stateless nature of NFS (and the speed of this 3225 * program), there are times when the modification time 3226 * of a file created on a remote machine will not be 3227 * modified before the stat() implied by the Dir_MTime 3228 * occurs, thus leading us to believe that the file 3229 * is unchanged, wreaking havoc with files that depend 3230 * on this one. 3231 * 3232 * I have decided it is better to make too much than to 3233 * make too little, so this stuff is commented out 3234 * unless you're sure it's ok. 3235 * -- ardeb 1/12/88 3236 */ 3237 if (noExecute || Dir_MTime(gn) == 0) { 3238 gn->mtime = now; 3239 } 3240 if (gn->cmtime > gn->mtime) 3241 gn->mtime = gn->cmtime; 3242 DEBUGF(MAKE, ("update time: %s\n", 3243 Targ_FmtTime(gn->mtime))); 3244#endif 3245 if (!(gn->type & OP_EXEC)) { 3246 pgn->childMade = TRUE; 3247 Make_TimeStamp(pgn, gn); 3248 } 3249 3250 } else if (keepgoing) { 3251 pgn->make = FALSE; 3252 3253 } else { 3254 printf("\n\nStop in %s.\n", Var_Value(".CURDIR", gn)); 3255 exit(1); 3256 } 3257 } else if (gn->made == ERROR) { 3258 /* 3259 * Already had an error when making this beastie. Tell the 3260 * parent to abort. 3261 */ 3262 pgn->make = FALSE; 3263 } else { 3264 if (Lst_Member(&gn->iParents, pgn) != NULL) { 3265 Var_Set(IMPSRC, Var_Value(TARGET, gn), pgn); 3266 } 3267 switch(gn->made) { 3268 case BEINGMADE: 3269 Error("Graph cycles through %s\n", gn->name); 3270 gn->made = ERROR; 3271 pgn->make = FALSE; 3272 break; 3273 case MADE: 3274 if ((gn->type & OP_EXEC) == 0) { 3275 pgn->childMade = TRUE; 3276 Make_TimeStamp(pgn, gn); 3277 } 3278 break; 3279 case UPTODATE: 3280 if ((gn->type & OP_EXEC) == 0) { 3281 Make_TimeStamp(pgn, gn); 3282 } 3283 break; 3284 default: 3285 break; 3286 } 3287 } 3288 3289 return (0); 3290} 3291 3292/*- 3293 * Install signal handlers for Compat_Run 3294 */ 3295void 3296Compat_InstallSignalHandlers(void) 3297{ 3298 3299 if (signal(SIGINT, SIG_IGN) != SIG_IGN) { 3300 signal(SIGINT, CompatCatchSig); 3301 } 3302 if (signal(SIGTERM, SIG_IGN) != SIG_IGN) { 3303 signal(SIGTERM, CompatCatchSig); 3304 } 3305 if (signal(SIGHUP, SIG_IGN) != SIG_IGN) { 3306 signal(SIGHUP, CompatCatchSig); 3307 } 3308 if (signal(SIGQUIT, SIG_IGN) != SIG_IGN) { 3309 signal(SIGQUIT, CompatCatchSig); 3310 } 3311} 3312 3313/*- 3314 *----------------------------------------------------------------------- 3315 * Compat_Run -- 3316 * Start making again, given a list of target nodes. 3317 * 3318 * Results: 3319 * None. 3320 * 3321 * Side Effects: 3322 * Guess what? 3323 * 3324 *----------------------------------------------------------------------- 3325 */ 3326void 3327Compat_Run(Lst *targs) 3328{ 3329 GNode *gn = NULL; /* Current root target */ 3330 int error_cnt; /* Number of targets not remade due to errors */ 3331 LstNode *ln; 3332 3333 Compat_InstallSignalHandlers(); 3334 ENDNode = Targ_FindNode(".END", TARG_CREATE); 3335 /* 3336 * If the user has defined a .BEGIN target, execute the commands 3337 * attached to it. 3338 */ 3339 if (!queryFlag) { 3340 gn = Targ_FindNode(".BEGIN", TARG_NOCREATE); 3341 if (gn != NULL) { 3342 LST_FOREACH(ln, &gn->commands) { 3343 if (Compat_RunCommand(Lst_Datum(ln), gn)) 3344 break; 3345 } 3346 if (gn->made == ERROR) { 3347 printf("\n\nStop.\n"); 3348 exit(1); 3349 } 3350 } 3351 } 3352 3353 /* 3354 * For each entry in the list of targets to create, call Compat_Make on 3355 * it to create the thing. Compat_Make will leave the 'made' field of gn 3356 * in one of several states: 3357 * UPTODATE gn was already up-to-date 3358 * MADE gn was recreated successfully 3359 * ERROR An error occurred while gn was being created 3360 * ABORTED gn was not remade because one of its inferiors 3361 * could not be made due to errors. 3362 */ 3363 error_cnt = 0; 3364 while (!Lst_IsEmpty(targs)) { 3365 gn = Lst_DeQueue(targs); 3366 Compat_Make(gn, gn); 3367 3368 if (gn->made == UPTODATE) { 3369 printf("`%s' is up to date.\n", gn->name); 3370 } else if (gn->made == ABORTED) { 3371 printf("`%s' not remade because of errors.\n", 3372 gn->name); 3373 error_cnt += 1; 3374 } 3375 } 3376 3377 /* 3378 * If the user has defined a .END target, run its commands. 3379 */ 3380 if (error_cnt == 0) { 3381 LST_FOREACH(ln, &ENDNode->commands) { 3382 if (Compat_RunCommand(Lst_Datum(ln), ENDNode)) 3383 break; 3384 } 3385 } 3386} 3387 3388