Annotation of src/usr.bin/make/job.c, Revision 1.138
1.138 ! natano 1: /* $OpenBSD: job.c,v 1.137 2017/01/21 11:30:11 deraadt Exp $ */
1.6 millert 2: /* $NetBSD: job.c,v 1.16 1996/11/06 17:59:08 christos Exp $ */
1.1 deraadt 3:
4: /*
1.124 espie 5: * Copyright (c) 2012 Marc Espie.
6: *
7: * Extensive code modifications for the OpenBSD project.
8: *
9: * Redistribution and use in source and binary forms, with or without
10: * modification, are permitted provided that the following conditions
11: * are met:
12: * 1. Redistributions of source code must retain the above copyright
13: * notice, this list of conditions and the following disclaimer.
14: * 2. Redistributions in binary form must reproduce the above copyright
15: * notice, this list of conditions and the following disclaimer in the
16: * documentation and/or other materials provided with the distribution.
17: *
18: * THIS SOFTWARE IS PROVIDED BY THE OPENBSD PROJECT AND CONTRIBUTORS
19: * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20: * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21: * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OPENBSD
22: * PROJECT OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23: * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24: * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28: * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29: */
30: /*
1.1 deraadt 31: * Copyright (c) 1988, 1989, 1990 The Regents of the University of California.
32: * Copyright (c) 1988, 1989 by Adam de Boor
33: * Copyright (c) 1989 by Berkeley Softworks
34: * All rights reserved.
35: *
36: * This code is derived from software contributed to Berkeley by
37: * Adam de Boor.
38: *
39: * Redistribution and use in source and binary forms, with or without
40: * modification, are permitted provided that the following conditions
41: * are met:
42: * 1. Redistributions of source code must retain the above copyright
43: * notice, this list of conditions and the following disclaimer.
44: * 2. Redistributions in binary form must reproduce the above copyright
45: * notice, this list of conditions and the following disclaimer in the
46: * documentation and/or other materials provided with the distribution.
1.55 millert 47: * 3. Neither the name of the University nor the names of its contributors
1.1 deraadt 48: * may be used to endorse or promote products derived from this software
49: * without specific prior written permission.
50: *
51: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
52: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
53: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
54: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
55: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
56: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
57: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
58: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
59: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
60: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
61: * SUCH DAMAGE.
62: */
63:
64: /*-
65: * job.c --
66: * handle the creation etc. of our child processes.
67: *
68: * Interface:
1.40 espie 69: * Job_Make Start the creation of the given target.
1.1 deraadt 70: *
1.124 espie 71: * Job_Init Called to initialize this module.
72: *
73: * Job_Begin execute commands attached to the .BEGIN target
74: * if any.
1.40 espie 75: *
1.117 espie 76: * can_start_job Return true if we can start job
1.40 espie 77: *
1.41 espie 78: * Job_Empty Return true if the job table is completely
1.40 espie 79: * empty.
80: *
81: * Job_Finish Perform any final processing which needs doing.
82: * This includes the execution of any commands
83: * which have been/were attached to the .END
1.124 espie 84: * target.
1.40 espie 85: *
1.117 espie 86: * Job_AbortAll Abort all current jobs. It doesn't
1.40 espie 87: * handle output or do anything for the jobs,
1.124 espie 88: * just kills them.
1.1 deraadt 89: *
1.117 espie 90: * Job_Wait Wait for all running jobs to finish.
1.1 deraadt 91: */
92:
93: #include <sys/types.h>
94: #include <sys/wait.h>
1.41 espie 95: #include <ctype.h>
96: #include <errno.h>
1.1 deraadt 97: #include <fcntl.h>
1.41 espie 98: #include <signal.h>
1.69 espie 99: #include <stdarg.h>
1.1 deraadt 100: #include <stdio.h>
1.42 espie 101: #include <stdlib.h>
1.1 deraadt 102: #include <string.h>
1.41 espie 103: #include <unistd.h>
104: #include "config.h"
105: #include "defines.h"
1.1 deraadt 106: #include "job.h"
1.63 espie 107: #include "engine.h"
1.1 deraadt 108: #include "pathnames.h"
1.41 espie 109: #include "var.h"
110: #include "targ.h"
111: #include "error.h"
1.124 espie 112: #include "extern.h"
1.41 espie 113: #include "lst.h"
114: #include "gnode.h"
115: #include "memory.h"
116: #include "make.h"
1.124 espie 117: #include "buf.h"
1.78 espie 118:
1.40 espie 119: static int aborting = 0; /* why is the make aborting? */
120: #define ABORT_ERROR 1 /* Because of an error */
121: #define ABORT_INTERRUPT 2 /* Because it was interrupted */
122: #define ABORT_WAIT 3 /* Waiting for jobs to finish */
1.1 deraadt 123:
1.40 espie 124: static int maxJobs; /* The most children we can run at once */
1.124 espie 125: static int nJobs; /* Number of jobs already allocated */
126: static bool no_new_jobs; /* Mark recursive shit so we shouldn't start
127: * something else at the same time
128: */
129: Job *runningJobs; /* Jobs currently running a process */
130: Job *errorJobs; /* Jobs in error at end */
131: static Job *heldJobs; /* Jobs not running yet because of expensive */
1.134 espie 132: static pid_t mypid; /* Used for printing debugging messages */
1.1 deraadt 133:
1.128 espie 134: static volatile sig_atomic_t got_fatal;
1.112 espie 135:
1.124 espie 136: static volatile sig_atomic_t got_SIGINT, got_SIGHUP, got_SIGQUIT, got_SIGTERM,
1.128 espie 137: got_SIGINFO;
1.112 espie 138:
1.124 espie 139: static sigset_t sigset, emptyset;
1.112 espie 140:
1.126 espie 141: static void handle_fatal_signal(int);
1.124 espie 142: static void handle_siginfo(void);
143: static void postprocess_job(Job *, bool);
144: static Job *prepare_job(GNode *);
145: static void determine_job_next_step(Job *);
146: static void remove_job(Job *, bool);
147: static void may_continue_job(Job *);
148: static void continue_job(Job *);
149: static Job *reap_finished_job(pid_t);
150: static bool reap_jobs(void);
1.112 espie 151:
1.111 espie 152: static void loop_handle_running_jobs(void);
1.124 espie 153: static bool expensive_job(Job *);
154: static bool expensive_command(const char *);
155: static void setup_signal(int);
156: static void notice_signal(int);
157: static void setup_all_signals(void);
1.128 espie 158: static const char *really_kill(Job *, int);
159: static void debug_kill_printf(const char *, ...);
160: static void debug_vprintf(const char *, va_list);
161: static void may_remove_target(Job *);
1.131 espie 162: static const char *really_kill(Job *, int);
163: static void print_error(Job *);
164: static void internal_print_errors(void);
165:
166: static int dying_signal = 0;
167:
168: const char * basedirectory = NULL;
1.127 espie 169:
1.128 espie 170: static const char *
171: really_kill(Job *job, int signo)
172: {
173: pid_t pid = job->pid;
174: if (getpgid(pid) != getpgrp()) {
175: if (killpg(pid, signo) == 0)
176: return "group got signal";
177: pid = -pid;
178: } else {
179: if (kill(pid, signo) == 0)
180: return "process got signal";
181: }
1.138 ! natano 182: if (errno == ESRCH)
1.128 espie 183: job->flags |= JOB_LOST;
1.138 ! natano 184: return strerror(errno);
1.128 espie 185: }
186:
187: static void
188: may_remove_target(Job *j)
189: {
1.131 espie 190: int dying = check_dying_signal();
191:
192: if (dying && !noExecute && !Targ_Precious(j->node)) {
1.128 espie 193: const char *file = Var(TARGET_INDEX, j->node);
194: int r = eunlink(file);
195:
196: if (DEBUG(JOB) && r == -1)
197: fprintf(stderr, " *** would unlink %s\n", file);
198: if (r != -1)
199: fprintf(stderr, " *** %s removed\n", file);
1.127 espie 200: }
201: }
1.126 espie 202:
1.131 espie 203: static void
204: buf_addcurdir(BUFFER *buf)
205: {
206: const char *v = Var_Value(".CURDIR");
207: if (basedirectory != NULL) {
208: size_t len = strlen(basedirectory);
209: if (strncmp(basedirectory, v, len) == 0 &&
210: v[len] == '/') {
211: v += len+1;
212: } else if (strcmp(basedirectory, v) == 0) {
213: Buf_AddString(buf, ".");
214: return;
215: }
216: }
217: Buf_AddString(buf, v);
218: }
219:
220: static const char *
221: shortened_curdir(void)
222: {
223: static BUFFER buf;
224: bool first = true;
225: if (first) {
226: Buf_Init(&buf, 0);
227: buf_addcurdir(&buf);
228: first = false;
229: }
230: return Buf_Retrieve(&buf);
231: }
232:
233: static void
234: quick_error(Job *j, int signo, bool first)
235: {
236: if (first) {
237: fprintf(stderr, "*** Signal SIG%s", sys_signame[signo]);
238: fprintf(stderr, " in %s (", shortened_curdir());
239: } else
240: fprintf(stderr, " ");
241:
242: fprintf(stderr, "%s", j->node->name);
243: free(j->cmd);
244: }
245:
1.126 espie 246: static void
1.130 espie 247: print_error(Job *j)
1.126 espie 248: {
1.130 espie 249: static bool first = true;
1.131 espie 250: BUFFER buf;
251:
252: Buf_Init(&buf, 0);
1.126 espie 253:
1.131 espie 254: if (j->exit_type == JOB_EXIT_BAD)
255: Buf_printf(&buf, "*** Error %d", j->code);
256: else if (j->exit_type == JOB_SIGNALED) {
1.128 espie 257: if (j->code < NSIG)
1.131 espie 258: Buf_printf(&buf, "*** Signal SIG%s",
1.128 espie 259: sys_signame[j->code]);
260: else
1.131 espie 261: Buf_printf(&buf, "*** unknown signal %d", j->code);
1.128 espie 262: } else
1.131 espie 263: Buf_printf(&buf, "*** Should not happen %d/%d",
264: j->exit_type, j->code);
1.128 espie 265: if (DEBUG(KILL) && (j->flags & JOB_LOST))
1.131 espie 266: Buf_AddChar(&buf, '!');
1.130 espie 267: if (first) {
1.131 espie 268: Buf_AddString(&buf, " in ");
269: buf_addcurdir(&buf);
1.130 espie 270: first = false;
271: }
1.131 espie 272: Buf_printf(&buf, " (%s:%lu", j->location->fname, j->location->lineno);
273: Buf_printf(&buf, " '%s'", j->node->name);
274: if ((j->flags & (JOB_SILENT | JOB_IS_EXPENSIVE)) == JOB_SILENT
1.132 espie 275: && Buf_Size(&buf) < 140-2) {
1.131 espie 276: size_t len = strlen(j->cmd);
277: Buf_AddString(&buf, ": ");
278: if (len + Buf_Size(&buf) < 140)
279: Buf_AddString(&buf, j->cmd);
280: else {
281: Buf_AddChars(&buf, 140 - Buf_Size(&buf), j->cmd);
282: Buf_AddString(&buf, "...");
283: }
284: }
285: fprintf(stderr, "%s)\n", Buf_Retrieve(&buf));
286: Buf_Destroy(&buf);
1.126 espie 287: free(j->cmd);
1.131 espie 288: }
289: static void
290: quick_summary(int signo)
291: {
292: Job *j, *k, *jnext;
293: bool first = true;
294:
295: k = errorJobs;
296: errorJobs = NULL;
297: for (j = k; j != NULL; j = jnext) {
298: jnext = j->next;
299: if ((j->exit_type == JOB_EXIT_BAD && j->code == signo+128) ||
300: (j->exit_type == JOB_SIGNALED && j->code == signo)) {
301: quick_error(j, signo, first);
302: first = false;
303: } else {
304: j->next = errorJobs;
305: errorJobs = j;
306: }
307: }
308: if (!first)
309: fprintf(stderr, ")\n");
1.126 espie 310: }
1.93 espie 311:
1.131 espie 312: static void
313: internal_print_errors()
1.101 espie 314: {
1.126 espie 315: Job *j, *k, *jnext;
1.131 espie 316: int dying;
1.124 espie 317:
1.130 espie 318: if (!errorJobs)
1.133 espie 319: fprintf(stderr, "Stop in %s\n", shortened_curdir());
1.1 deraadt 320:
1.131 espie 321: for (j = errorJobs; j != NULL; j = j->next)
322: may_remove_target(j);
323: dying = check_dying_signal();
324: if (dying)
325: quick_summary(dying);
1.126 espie 326: while (errorJobs != NULL) {
327: k = errorJobs;
328: errorJobs = NULL;
329: for (j = k; j != NULL; j = jnext) {
330: jnext = j->next;
331: if (j->location->fname == k->location->fname)
1.130 espie 332: print_error(j);
1.126 espie 333: else {
334: j->next = errorJobs;
335: errorJobs = j;
336: }
337: }
1.101 espie 338: }
1.88 espie 339: }
340:
1.131 espie 341: void
342: print_errors(void)
343: {
344: handle_all_signals();
345: internal_print_errors();
346: }
347:
1.57 espie 348: static void
1.124 espie 349: setup_signal(int sig)
1.57 espie 350: {
1.124 espie 351: if (signal(sig, SIG_IGN) != SIG_IGN) {
352: (void)signal(sig, notice_signal);
353: sigaddset(&sigset, sig);
1.57 espie 354: }
355: }
356:
357: static void
1.124 espie 358: notice_signal(int sig)
1.1 deraadt 359: {
1.126 espie 360:
1.124 espie 361: switch(sig) {
1.117 espie 362: case SIGINT:
363: got_SIGINT++;
1.124 espie 364: got_fatal = 1;
365: break;
1.117 espie 366: case SIGHUP:
367: got_SIGHUP++;
1.124 espie 368: got_fatal = 1;
369: break;
1.117 espie 370: case SIGQUIT:
371: got_SIGQUIT++;
1.124 espie 372: got_fatal = 1;
373: break;
1.117 espie 374: case SIGTERM:
375: got_SIGTERM++;
1.124 espie 376: got_fatal = 1;
1.117 espie 377: break;
1.124 espie 378: case SIGINFO:
379: got_SIGINFO++;
1.117 espie 380: break;
1.124 espie 381: case SIGCHLD:
1.117 espie 382: break;
1.66 espie 383: }
1.124 espie 384: }
1.117 espie 385:
1.135 espie 386: static void
1.124 espie 387: setup_all_signals(void)
388: {
389: sigemptyset(&sigset);
390: sigemptyset(&emptyset);
391: /*
392: * Catch the four signals that POSIX specifies if they aren't ignored.
393: * handle_signal will take care of calling JobInterrupt if appropriate.
394: */
395: setup_signal(SIGINT);
396: setup_signal(SIGHUP);
397: setup_signal(SIGQUIT);
398: setup_signal(SIGTERM);
399: /* Display running jobs on SIGINFO */
400: setup_signal(SIGINFO);
401: /* Have to see SIGCHLD */
402: setup_signal(SIGCHLD);
403: got_fatal = 0;
1.1 deraadt 404: }
405:
1.124 espie 406: static void
407: handle_siginfo(void)
1.1 deraadt 408: {
1.126 espie 409: static BUFFER buf;
410: static size_t length = 0;
411:
1.124 espie 412: Job *job;
413: bool first = true;
1.66 espie 414:
1.124 espie 415: got_SIGINFO = 0;
416: /* we have to store the info in a buffer, because status from all
417: * makes running would get intermixed otherwise
1.66 espie 418: */
1.124 espie 419:
1.126 espie 420: if (length == 0) {
421: Buf_Init(&buf, 0);
1.131 espie 422: Buf_printf(&buf, "%s in ", Var_Value("MAKE"));
423: buf_addcurdir(&buf);
424: Buf_AddString(&buf, ": ");
1.126 espie 425: length = Buf_Size(&buf);
426: } else
427: Buf_Truncate(&buf, length);
1.124 espie 428:
429: for (job = runningJobs; job != NULL ; job = job->next) {
430: if (!first)
431: Buf_puts(&buf, ", ");
432: first = false;
433: Buf_puts(&buf, job->node->name);
434: }
435: Buf_puts(&buf, first ? "nothing running\n" : "\n");
1.1 deraadt 436:
1.124 espie 437: fputs(Buf_Retrieve(&buf), stderr);
1.1 deraadt 438: }
439:
1.131 espie 440: int
441: check_dying_signal(void)
442: {
443: sigset_t set;
444: if (dying_signal)
445: return dying_signal;
446: sigpending(&set);
447: if (got_SIGINT || sigismember(&set, SIGINT))
448: return dying_signal = SIGINT;
449: if (got_SIGHUP || sigismember(&set, SIGHUP))
450: return dying_signal = SIGHUP;
451: if (got_SIGQUIT || sigismember(&set, SIGQUIT))
452: return dying_signal = SIGQUIT;
453: if (got_SIGTERM || sigismember(&set, SIGTERM))
454: return dying_signal = SIGTERM;
455: return 0;
456: }
457:
1.124 espie 458: void
459: handle_all_signals(void)
1.1 deraadt 460: {
1.124 espie 461: if (got_SIGINFO)
462: handle_siginfo();
463: while (got_fatal) {
464: got_fatal = 0;
465: aborting = ABORT_INTERRUPT;
466:
467: if (got_SIGINT) {
468: got_SIGINT=0;
1.126 espie 469: handle_fatal_signal(SIGINT);
1.124 espie 470: }
471: if (got_SIGHUP) {
472: got_SIGHUP=0;
1.126 espie 473: handle_fatal_signal(SIGHUP);
1.124 espie 474: }
475: if (got_SIGQUIT) {
476: got_SIGQUIT=0;
1.126 espie 477: handle_fatal_signal(SIGQUIT);
1.124 espie 478: }
479: if (got_SIGTERM) {
480: got_SIGTERM=0;
1.126 espie 481: handle_fatal_signal(SIGTERM);
1.124 espie 482: }
483: }
1.1 deraadt 484: }
485:
1.128 espie 486: static void
487: debug_vprintf(const char *fmt, va_list va)
488: {
489: (void)printf("[%ld] ", (long)mypid);
490: (void)vprintf(fmt, va);
491: fflush(stdout);
492: }
493:
1.124 espie 494: void
495: debug_job_printf(const char *fmt, ...)
1.84 espie 496: {
497: if (DEBUG(JOB)) {
498: va_list va;
499: va_start(va, fmt);
1.128 espie 500: debug_vprintf(fmt, va);
501: va_end(va);
502: }
503: }
504:
505: static void
506: debug_kill_printf(const char *fmt, ...)
507: {
508: if (DEBUG(KILL)) {
509: va_list va;
510: va_start(va, fmt);
511: debug_vprintf(fmt, va);
1.84 espie 512: va_end(va);
513: }
514: }
1.119 espie 515:
1.1 deraadt 516: /*-
517: *-----------------------------------------------------------------------
1.124 espie 518: * postprocess_job --
519: * Do final processing for the given job including updating
1.119 espie 520: * parents and starting new jobs as available/necessary.
1.1 deraadt 521: *
522: * Side Effects:
1.6 millert 523: * If we got an error and are aborting (aborting == ABORT_ERROR) and
1.1 deraadt 524: * the job list is now empty, we are done for the day.
1.101 espie 525: * If we recognized an error we set the aborting flag
1.1 deraadt 526: * to ABORT_ERROR so no more jobs will be started.
527: *-----------------------------------------------------------------------
528: */
529: /*ARGSUSED*/
1.112 espie 530:
1.1 deraadt 531: static void
1.124 espie 532: postprocess_job(Job *job, bool okay)
1.2 deraadt 533: {
1.124 espie 534: if (okay &&
1.66 espie 535: aborting != ABORT_ERROR &&
1.124 espie 536: aborting != ABORT_INTERRUPT) {
1.66 espie 537: /* As long as we aren't aborting and the job didn't return a
538: * non-zero status that we shouldn't ignore, we call
1.101 espie 539: * Make_Update to update the parents. */
1.108 espie 540: job->node->built_status = MADE;
1.66 espie 541: Make_Update(job->node);
1.124 espie 542: free(job);
1.66 espie 543: }
1.1 deraadt 544:
1.124 espie 545: if (errorJobs != NULL && !keepgoing &&
1.117 espie 546: aborting != ABORT_INTERRUPT)
1.66 espie 547: aborting = ABORT_ERROR;
1.6 millert 548:
1.124 espie 549: if (aborting == ABORT_ERROR && DEBUG(QUICKDEATH))
1.126 espie 550: handle_fatal_signal(SIGINT);
1.117 espie 551: if (aborting == ABORT_ERROR && Job_Empty())
1.124 espie 552: Finish();
1.1 deraadt 553: }
554:
1.124 espie 555: /* expensive jobs handling: in order to avoid forking an exponential number
556: * of jobs, make tries to figure out "recursive make" configurations.
557: * It may err on the side of caution.
558: * Basically, a command is "expensive" if it's likely to fork an extra
559: * level of make: either by looking at the command proper, or if it has
560: * some specific qualities ('+cmd' are likely to be recursive, as are
561: * .MAKE: commands). It's possible to explicitly say some targets are
562: * expensive or cheap with .EXPENSIVE or .CHEAP.
563: *
564: * While an expensive command is running, no_new_jobs
565: * is set, so jobs that would fork new processes are accumulated in the
566: * heldJobs list instead.
567: *
568: * This heuristics is also used on error exit: we display silent commands
569: * that failed, unless those ARE expensive commands: expensive commands
570: * are likely to not be failing by themselves, but to be the result of
571: * a cascade of failures in descendant makes.
572: */
573: void
574: determine_expensive_job(Job *job)
575: {
576: if (expensive_job(job)) {
577: job->flags |= JOB_IS_EXPENSIVE;
578: no_new_jobs = true;
579: } else
580: job->flags &= ~JOB_IS_EXPENSIVE;
581: if (DEBUG(EXPENSIVE))
582: fprintf(stderr, "[%ld] Target %s running %.50s: %s\n",
583: (long)mypid, job->node->name, job->cmd,
584: job->flags & JOB_IS_EXPENSIVE ? "expensive" : "cheap");
1.101 espie 585: }
586:
1.124 espie 587: static bool
588: expensive_job(Job *job)
1.1 deraadt 589: {
1.124 espie 590: if (job->node->type & OP_CHEAP)
591: return false;
592: if (job->node->type & (OP_EXPENSIVE | OP_MAKE))
593: return true;
594: return expensive_command(job->cmd);
1.96 espie 595: }
596:
1.117 espie 597: static bool
598: expensive_command(const char *s)
1.1 deraadt 599: {
1.117 espie 600: const char *p;
601: bool include = false;
602: bool expensive = false;
1.66 espie 603:
1.117 espie 604: /* okay, comments are cheap, always */
605: if (*s == '#')
606: return false;
1.124 espie 607: /* and commands we always execute are expensive */
608: if (*s == '+')
609: return true;
1.66 espie 610:
1.117 espie 611: for (p = s; *p != '\0'; p++) {
612: if (*p == ' ' || *p == '\t') {
613: include = false;
614: if (p[1] == '-' && p[2] == 'I')
615: include = true;
616: }
617: if (include)
618: continue;
619: /* KMP variant, avoid looking twice at the same
620: * letter.
621: */
622: if (*p != 'm')
623: continue;
624: if (p[1] != 'a')
625: continue;
626: p++;
627: if (p[1] != 'k')
628: continue;
629: p++;
630: if (p[1] != 'e')
631: continue;
632: p++;
633: expensive = true;
634: while (p[1] != '\0' && p[1] != ' ' && p[1] != '\t') {
1.124 espie 635: if (p[1] == '.' || p[1] == '/') {
1.117 espie 636: expensive = false;
637: break;
1.66 espie 638: }
1.117 espie 639: p++;
1.1 deraadt 640: }
1.117 espie 641: if (expensive)
642: return true;
1.1 deraadt 643: }
1.117 espie 644: return false;
645: }
646:
1.98 espie 647: static Job *
1.124 espie 648: prepare_job(GNode *gn)
1.78 espie 649: {
1.124 espie 650: /* a new job is prepared unless its commands are bogus (we don't
651: * have anything for it), or if we're in touch mode.
652: *
653: * Note that even in noexec mode, some commands may still run
654: * thanks to the +cmd construct.
1.1 deraadt 655: */
1.124 espie 656: if (node_find_valid_commands(gn)) {
657: if (touchFlag) {
658: Job_Touch(gn);
659: return NULL;
660: } else {
661: Job *job;
1.6 millert 662:
1.124 espie 663: job = emalloc(sizeof(Job));
664: if (job == NULL)
665: Punt("can't create job: out of memory");
1.66 espie 666:
1.124 espie 667: job_attach_node(job, gn);
668: return job;
669: }
1.66 espie 670: } else {
1.124 espie 671: node_failure(gn);
672: return NULL;
1.1 deraadt 673: }
1.124 espie 674: }
1.66 espie 675:
1.124 espie 676: static void
677: may_continue_job(Job *job)
678: {
679: if (no_new_jobs) {
680: if (DEBUG(EXPENSIVE))
681: fprintf(stderr, "[%ld] expensive -> hold %s\n",
682: (long)mypid, job->node->name);
683: job->next = heldJobs;
684: heldJobs = job;
685: } else
686: continue_job(job);
687: }
1.122 espie 688:
1.124 espie 689: static void
690: continue_job(Job *job)
691: {
692: bool finished = job_run_next(job);
693: if (finished)
694: remove_job(job, true);
695: else
696: determine_expensive_job(job);
1.98 espie 697: }
1.1 deraadt 698:
1.98 espie 699: /*-
700: *-----------------------------------------------------------------------
1.124 espie 701: * Job_Make --
1.98 espie 702: * Start a target-creation process going for the target described
703: * by the graph node gn.
704: *
705: * Side Effects:
1.124 espie 706: * A new Job node is created and its commands continued, which
707: * may fork the first command of that job.
1.98 espie 708: *-----------------------------------------------------------------------
709: */
1.124 espie 710: void
711: Job_Make(GNode *gn)
1.98 espie 712: {
713: Job *job;
1.124 espie 714:
715: job = prepare_job(gn);
1.98 espie 716: if (!job)
717: return;
1.124 espie 718: nJobs++;
719: may_continue_job(job);
1.1 deraadt 720: }
721:
1.101 espie 722: static void
1.124 espie 723: determine_job_next_step(Job *job)
1.2 deraadt 724: {
1.124 espie 725: bool okay;
726: if (job->flags & JOB_IS_EXPENSIVE) {
727: no_new_jobs = false;
728: if (DEBUG(EXPENSIVE))
729: fprintf(stderr, "[%ld] "
730: "Returning from expensive target %s, "
731: "allowing new jobs\n", (long)mypid,
732: job->node->name);
733: }
1.2 deraadt 734:
1.124 espie 735: okay = job->exit_type == JOB_EXIT_OKAY;
736: if (!okay || job->next_cmd == NULL)
737: remove_job(job, okay);
738: else
739: may_continue_job(job);
1.101 espie 740: }
741:
742: static void
1.124 espie 743: remove_job(Job *job, bool okay)
1.101 espie 744: {
1.124 espie 745: nJobs--;
746: postprocess_job(job, okay);
747: while (!no_new_jobs) {
748: if (heldJobs != NULL) {
749: job = heldJobs;
750: heldJobs = heldJobs->next;
751: if (DEBUG(EXPENSIVE))
752: fprintf(stderr, "[%ld] cheap -> release %s\n",
753: (long)mypid, job->node->name);
754: continue_job(job);
755: } else
756: break;
1.2 deraadt 757: }
758: }
1.111 espie 759:
1.124 espie 760: /*
761: * job = reap_finished_job(pid):
762: * retrieve and remove a job from runningJobs, based on its pid
1.1 deraadt 763: *
1.124 espie 764: * Note that we remove it right away, so that handle_signals()
765: * is accurate.
1.1 deraadt 766: */
1.124 espie 767: static Job *
768: reap_finished_job(pid_t pid)
1.66 espie 769: {
1.124 espie 770: Job **j, *job;
1.1 deraadt 771:
1.124 espie 772: for (j = &runningJobs; *j != NULL; j = &((*j)->next))
773: if ((*j)->pid == pid) {
774: job = *j;
775: *j = job->next;
776: return job;
1.66 espie 777: }
1.1 deraadt 778:
1.124 espie 779: return NULL;
1.101 espie 780: }
1.6 millert 781:
1.124 espie 782: /*
783: * classic waitpid handler: retrieve as many dead children as possible.
784: * returns true if succesful
785: */
786: static bool
787: reap_jobs(void)
1.117 espie 788: {
1.124 espie 789: pid_t pid; /* pid of dead child */
790: int status; /* Exit/termination status */
791: bool reaped = false;
1.117 espie 792: Job *job;
793:
794: while ((pid = waitpid(WAIT_ANY, &status, WNOHANG)) > 0) {
1.124 espie 795: reaped = true;
796: job = reap_finished_job(pid);
1.1 deraadt 797:
1.124 espie 798: if (job == NULL) {
799: Punt("Child (%ld) not in table?", (long)pid);
1.66 espie 800: } else {
1.124 espie 801: job_handle_status(job, status);
802: determine_job_next_step(job);
1.1 deraadt 803: }
804: }
1.124 espie 805: /* sanity check, should not happen */
806: if (pid == -1 && errno == ECHILD && runningJobs != NULL)
807: Punt("Process has no children, but runningJobs is not empty ?");
808: return reaped;
1.1 deraadt 809: }
810:
811: void
1.124 espie 812: handle_running_jobs(void)
1.1 deraadt 813: {
1.124 espie 814: sigset_t old;
815: /* reaping children in the presence of caught signals */
1.91 espie 816:
1.124 espie 817: /* first, we make sure to hold on new signals, to synchronize
818: * reception of new stuff on sigsuspend
819: */
820: sigprocmask(SIG_BLOCK, &sigset, &old);
1.135 espie 821: /* note this will NOT loop until runningJobs == NULL.
822: * It's merely an optimisation, namely that we don't need to go
823: * through the logic if no job is present. As soon as a job
824: * gets reaped, we WILL exit the loop through the break.
825: */
1.124 espie 826: while (runningJobs != NULL) {
827: /* did we already have pending stuff that advances things ?
828: * then handle_all_signals() will not return
829: * or reap_jobs() will reap_jobs()
830: */
831: handle_all_signals();
832: if (reap_jobs())
833: break;
834: /* okay, so it's safe to suspend, we have nothing to do but
835: * wait...
836: */
837: sigsuspend(&emptyset);
1.1 deraadt 838: }
1.124 espie 839: sigprocmask(SIG_SETMASK, &old, NULL);
1.1 deraadt 840: }
841:
1.111 espie 842: void
1.124 espie 843: handle_one_job(Job *job)
1.111 espie 844: {
1.124 espie 845: int stat;
846: int status;
847: sigset_t old;
848:
849: sigprocmask(SIG_BLOCK, &sigset, &old);
850: while (1) {
851: handle_all_signals();
852: stat = waitpid(job->pid, &status, WNOHANG);
853: if (stat == job->pid)
854: break;
855: sigsuspend(&emptyset);
856: }
857: runningJobs = NULL;
858: job_handle_status(job, status);
859: sigprocmask(SIG_SETMASK, &old, NULL);
1.111 espie 860: }
861:
862: static void
863: loop_handle_running_jobs()
864: {
1.124 espie 865: while (runningJobs != NULL)
1.111 espie 866: handle_running_jobs();
867: }
1.1 deraadt 868:
869: void
1.83 espie 870: Job_Init(int maxproc)
1.1 deraadt 871: {
1.124 espie 872: runningJobs = NULL;
873: heldJobs = NULL;
874: errorJobs = NULL;
1.117 espie 875: maxJobs = maxproc;
1.124 espie 876: mypid = getpid();
877:
1.117 espie 878: nJobs = 0;
1.66 espie 879:
1.117 espie 880: aborting = 0;
1.124 espie 881: setup_all_signals();
1.1 deraadt 882: }
883:
1.41 espie 884: bool
1.117 espie 885: can_start_job(void)
1.1 deraadt 886: {
1.124 espie 887: if (aborting || nJobs >= maxJobs)
1.117 espie 888: return false;
1.119 espie 889: else
1.117 espie 890: return true;
1.1 deraadt 891: }
892:
1.41 espie 893: bool
1.56 espie 894: Job_Empty(void)
1.1 deraadt 895: {
1.124 espie 896: return runningJobs == NULL;
1.1 deraadt 897: }
898:
899: /*-
900: *-----------------------------------------------------------------------
1.126 espie 901: * handle_fatal_signal --
902: * Handle the receipt of a fatal interrupt
1.1 deraadt 903: *
904: * Side Effects:
1.126 espie 905: * All children are killed. Another job may be started if there
906: * is an interrupt target and the signal was SIGINT.
1.1 deraadt 907: *-----------------------------------------------------------------------
908: */
909: static void
1.126 espie 910: handle_fatal_signal(int signo)
1.1 deraadt 911: {
1.124 espie 912: Job *job;
1.66 espie 913:
1.128 espie 914: debug_kill_printf("handle_fatal_signal(%d) called.\n", signo);
1.66 espie 915:
1.131 espie 916: dying_signal = signo;
1.124 espie 917: for (job = runningJobs; job != NULL; job = job->next) {
1.128 espie 918: debug_kill_printf("passing to "
919: "child %ld running %s: %s\n", (long)job->pid,
920: job->node->name, really_kill(job, signo));
921: may_remove_target(job);
1.2 deraadt 922: }
1.1 deraadt 923:
1.124 espie 924: if (signo == SIGINT && !touchFlag) {
1.78 espie 925: if ((interrupt_node->type & OP_DUMMY) == 0) {
1.66 espie 926: ignoreErrors = false;
927:
1.124 espie 928: Job_Make(interrupt_node);
1.66 espie 929: }
1.1 deraadt 930: }
1.124 espie 931: loop_handle_running_jobs();
1.131 espie 932: internal_print_errors();
1.124 espie 933:
934: /* die by that signal */
935: sigprocmask(SIG_BLOCK, &sigset, NULL);
936: signal(signo, SIG_DFL);
1.126 espie 937: kill(getpid(), signo);
1.124 espie 938: sigprocmask(SIG_SETMASK, &emptyset, NULL);
939: /*NOTREACHED*/
1.131 espie 940: fprintf(stderr, "This should never happen\n");
941: exit(1);
1.1 deraadt 942: }
943:
944: /*
945: *-----------------------------------------------------------------------
1.12 espie 946: * Job_Finish --
1.1 deraadt 947: * Do final processing such as the running of the commands
1.6 millert 948: * attached to the .END target.
1.1 deraadt 949: *
1.124 espie 950: * return true if fatal errors have happened.
1.1 deraadt 951: *-----------------------------------------------------------------------
952: */
1.124 espie 953: bool
1.56 espie 954: Job_Finish(void)
1.1 deraadt 955: {
1.134 espie 956: bool problem = errorJobs != NULL;
1.124 espie 957:
1.116 espie 958: if ((end_node->type & OP_DUMMY) == 0) {
1.134 espie 959: if (problem) {
1.66 espie 960: Error("Errors reported so .END ignored");
961: } else {
1.124 espie 962: Job_Make(end_node);
1.111 espie 963: loop_handle_running_jobs();
1.66 espie 964: }
1.1 deraadt 965: }
1.134 espie 966: return problem;
1.1 deraadt 967: }
968:
1.124 espie 969: void
970: Job_Begin(void)
971: {
972: if ((begin_node->type & OP_DUMMY) == 0) {
973: Job_Make(begin_node);
974: loop_handle_running_jobs();
975: }
976: }
977:
1.1 deraadt 978: /*-
979: *-----------------------------------------------------------------------
980: * Job_Wait --
981: * Waits for all running jobs to finish and returns. Sets 'aborting'
982: * to ABORT_WAIT to prevent other jobs from starting.
983: *
984: * Side Effects:
985: * Currently running jobs finish.
986: *
987: *-----------------------------------------------------------------------
988: */
989: void
1.56 espie 990: Job_Wait(void)
1.1 deraadt 991: {
1.66 espie 992: aborting = ABORT_WAIT;
1.111 espie 993: loop_handle_running_jobs();
1.66 espie 994: aborting = 0;
1.1 deraadt 995: }
996:
997: /*-
998: *-----------------------------------------------------------------------
999: * Job_AbortAll --
1000: * Abort all currently running jobs without handling output or anything.
1001: * This function is to be called only in the event of a major
1.124 espie 1002: * error.
1.1 deraadt 1003: *
1004: * Side Effects:
1.124 espie 1005: * All children are killed
1.1 deraadt 1006: *-----------------------------------------------------------------------
1007: */
1008: void
1.56 espie 1009: Job_AbortAll(void)
1.1 deraadt 1010: {
1.66 espie 1011: Job *job; /* the job descriptor in that element */
1012: int foo;
1.6 millert 1013:
1.66 espie 1014: aborting = ABORT_ERROR;
1.6 millert 1015:
1.124 espie 1016: for (job = runningJobs; job != NULL; job = job->next) {
1.126 espie 1017: killpg(job->pid, SIGINT);
1018: killpg(job->pid, SIGKILL);
1.1 deraadt 1019: }
1.6 millert 1020:
1.66 espie 1021: /*
1022: * Catch as many children as want to report in at first, then give up
1023: */
1.117 espie 1024: while (waitpid(WAIT_ANY, &foo, WNOHANG) > 0)
1.66 espie 1025: continue;
1.2 deraadt 1026: }
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