Annotation of src/usr.bin/make/job.c, Revision 1.101
1.40 espie 1: /* $OpenPackages$ */
1.93 espie 2: /* $OpenBSD$ */
1.6 millert 3: /* $NetBSD: job.c,v 1.16 1996/11/06 17:59:08 christos Exp $ */
1.1 deraadt 4:
5: /*
6: * Copyright (c) 1988, 1989, 1990 The Regents of the University of California.
7: * Copyright (c) 1988, 1989 by Adam de Boor
8: * Copyright (c) 1989 by Berkeley Softworks
9: * All rights reserved.
10: *
11: * This code is derived from software contributed to Berkeley by
12: * Adam de Boor.
13: *
14: * Redistribution and use in source and binary forms, with or without
15: * modification, are permitted provided that the following conditions
16: * are met:
17: * 1. Redistributions of source code must retain the above copyright
18: * notice, this list of conditions and the following disclaimer.
19: * 2. Redistributions in binary form must reproduce the above copyright
20: * notice, this list of conditions and the following disclaimer in the
21: * documentation and/or other materials provided with the distribution.
1.55 millert 22: * 3. Neither the name of the University nor the names of its contributors
1.1 deraadt 23: * may be used to endorse or promote products derived from this software
24: * without specific prior written permission.
25: *
26: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36: * SUCH DAMAGE.
37: */
38:
39: /*-
40: * job.c --
41: * handle the creation etc. of our child processes.
42: *
43: * Interface:
1.40 espie 44: * Job_Make Start the creation of the given target.
1.1 deraadt 45: *
1.40 espie 46: * Job_CatchChildren Check for and handle the termination of any
47: * children. This must be called reasonably
48: * frequently to keep the whole make going at
49: * a decent clip, since job table entries aren't
50: * removed until their process is caught this way.
51: *
52: * Job_CatchOutput Print any output our children have produced.
53: * Should also be called fairly frequently to
54: * keep the user informed of what's going on.
55: * If no output is waiting, it will block for
56: * a time given by the SEL_* constants, below,
57: * or until output is ready.
58: *
1.53 jmc 59: * Job_Init Called to initialize this module. in addition,
1.40 espie 60: * any commands attached to the .BEGIN target
61: * are executed before this function returns.
62: * Hence, the makefile must have been parsed
63: * before this function is called.
64: *
65: * Job_End Cleanup any memory used.
66: *
1.41 espie 67: * Job_Full Return true if the job table is filled.
1.40 espie 68: *
1.41 espie 69: * Job_Empty Return true if the job table is completely
1.40 espie 70: * empty.
71: *
72: * Job_Finish Perform any final processing which needs doing.
73: * This includes the execution of any commands
74: * which have been/were attached to the .END
75: * target. It should only be called when the
76: * job table is empty.
77: *
78: * Job_AbortAll Abort all currently running jobs. It doesn't
79: * handle output or do anything for the jobs,
80: * just kills them. It should only be called in
81: * an emergency, as it were.
1.1 deraadt 82: *
1.40 espie 83: * Job_Wait Wait for all currently-running jobs to finish.
1.1 deraadt 84: */
85:
86: #include <sys/types.h>
87: #include <sys/wait.h>
1.41 espie 88: #include <ctype.h>
89: #include <errno.h>
1.1 deraadt 90: #include <fcntl.h>
1.41 espie 91: #include <signal.h>
1.69 espie 92: #include <stdarg.h>
1.1 deraadt 93: #include <stdio.h>
1.42 espie 94: #include <stdlib.h>
1.1 deraadt 95: #include <string.h>
1.41 espie 96: #include <unistd.h>
97: #include "config.h"
98: #include "defines.h"
1.1 deraadt 99: #include "job.h"
1.63 espie 100: #include "engine.h"
1.1 deraadt 101: #include "pathnames.h"
1.41 espie 102: #include "var.h"
103: #include "targ.h"
104: #include "error.h"
105: #include "lst.h"
106: #include "extern.h"
107: #include "gnode.h"
108: #include "memory.h"
109: #include "make.h"
110:
1.50 espie 111: /*
112: * The SEL_ constants determine the maximum amount of time spent in select
113: * before coming out to see if a child has finished. SEL_SEC is the number of
114: * seconds and SEL_USEC is the number of micro-seconds
115: */
116: #define SEL_SEC 0
117: #define SEL_USEC 500000
118:
119:
120: /*-
121: * Job Table definitions.
122: *
123: * Each job has several things associated with it:
124: * 1) The process id of the child shell
125: * 2) The graph node describing the target being made by this job
1.93 espie 126: * 3) An FILE* for writing out the commands. This is only
1.50 espie 127: * used before the job is actually started.
1.93 espie 128: * 4) Things used for handling the shell's output.
1.76 espie 129: * the output is being caught via a pipe and
1.50 espie 130: * the descriptors of our pipe, an array in which output is line
131: * buffered and the current position in that buffer are all
1.78 espie 132: * maintained for each job.
1.93 espie 133: * 5) A word of flags which determine how the module handles errors,
1.50 espie 134: * echoing, etc. for the job
135: *
136: * The job "table" is kept as a linked Lst in 'jobs', with the number of
137: * active jobs maintained in the 'nJobs' variable. At no time will this
138: * exceed the value of 'maxJobs', initialized by the Job_Init function.
139: *
140: * When a job is finished, the Make_Update function is called on each of the
141: * parents of the node which was just remade. This takes care of the upward
142: * traversal of the dependency graph.
143: */
144: #define JOB_BUFSIZE 1024
1.101 ! espie 145: struct job_pipe {
! 146: int fd;
! 147: char buffer[JOB_BUFSIZE];
! 148: size_t pos;
! 149: };
! 150:
1.50 espie 151: typedef struct Job_ {
1.51 mpech 152: pid_t pid; /* The child's process ID */
1.50 espie 153: GNode *node; /* The target the child is making */
154: short flags; /* Flags to control treatment of job */
155: #define JOB_IGNERR 0x001 /* Ignore non-zero exits */
156: #define JOB_SILENT 0x002 /* no output */
1.83 espie 157: #define JOB_SPECIAL 0x004 /* Target is a special one. */
1.50 espie 158: #define JOB_RESTART 0x080 /* Job needs to be completely restarted */
1.79 espie 159: #define JOB_RESUME 0x100 /* Job needs to be resumed b/c it stopped,
160: * for some reason */
161: #define JOB_CONTINUING 0x200 /* We are in the process of resuming this job.
162: * Used to avoid infinite recursion between
163: * JobFinish and JobRestart */
1.101 ! espie 164: struct job_pipe in[2];
1.50 espie 165: } Job;
166:
1.78 espie 167:
1.40 espie 168: static int aborting = 0; /* why is the make aborting? */
169: #define ABORT_ERROR 1 /* Because of an error */
170: #define ABORT_INTERRUPT 2 /* Because it was interrupted */
171: #define ABORT_WAIT 3 /* Waiting for jobs to finish */
1.1 deraadt 172:
1.40 espie 173: static int maxJobs; /* The most children we can run at once */
1.83 espie 174: static int nJobs; /* The number of children currently running */
1.95 espie 175: static LIST runningJobs; /* The structures that describe them */
1.79 espie 176: static bool jobFull; /* Flag to tell when the job table is full. It
1.83 espie 177: * is set true when nJobs equals maxJobs */
1.40 espie 178: static fd_set *outputsp; /* Set of descriptors of pipes connected to
1.1 deraadt 179: * the output channels of children */
1.8 deraadt 180: static int outputsn;
1.48 espie 181: static GNode *lastNode; /* The node for which output was most recently
1.1 deraadt 182: * produced. */
183: /*
1.50 espie 184: * When JobStart attempts to run a job but isn't allowed to,
1.96 espie 185: * the job is placed on the queuedJobs queue to be run
1.6 millert 186: * when the next job finishes.
1.1 deraadt 187: */
1.96 espie 188: static LIST stoppedJobs;
189: static LIST queuedJobs;
1.101 ! espie 190: static LIST errorsList;
! 191: static int errors;
! 192: struct error_info {
! 193: int status;
! 194: char *name;
! 195: };
! 196:
1.1 deraadt 197:
198:
199: #if defined(USE_PGRP) && defined(SYSV)
1.40 espie 200: # define KILL(pid, sig) killpg(-(pid), (sig))
1.1 deraadt 201: #else
202: # if defined(USE_PGRP)
1.2 deraadt 203: # define KILL(pid, sig) killpg((pid), (sig))
1.1 deraadt 204: # else
1.2 deraadt 205: # define KILL(pid, sig) kill((pid), (sig))
1.1 deraadt 206: # endif
207: #endif
208:
1.6 millert 209: /*
1.2 deraadt 210: * Grmpf... There is no way to set bits of the wait structure
211: * anymore with the stupid W*() macros. I liked the union wait
212: * stuff much more. So, we devise our own macros... This is
213: * really ugly, use dramamine sparingly. You have been warned.
214: */
215: #define W_SETMASKED(st, val, fun) \
216: { \
217: int sh = (int) ~0; \
218: int mask = fun(sh); \
219: \
220: for (sh = 0; ((mask >> sh) & 1) == 0; sh++) \
221: continue; \
222: *(st) = (*(st) & ~mask) | ((val) << sh); \
223: }
224:
225: #define W_SETTERMSIG(st, val) W_SETMASKED(st, val, WTERMSIG)
226: #define W_SETEXITSTATUS(st, val) W_SETMASKED(st, val, WEXITSTATUS)
227:
228:
1.93 espie 229: static void pass_signal_to_job(void *, void *);
230: static void handle_all_signals(void);
231: static void handle_signal(int);
1.40 espie 232: static int JobCmpPid(void *, void *);
233: static void JobClose(Job *);
1.101 ! espie 234: static void JobFinish(Job *, int);
! 235: static void JobExec(Job *);
1.40 espie 236: static void JobRestart(Job *);
1.97 espie 237: static void JobStart(GNode *, int);
1.40 espie 238: static void JobInterrupt(int, int);
239: static void JobRestartJobs(void);
1.84 espie 240: static void debug_printf(const char *, ...);
1.98 espie 241: static Job *prepare_job(GNode *, int);
1.96 espie 242: static void start_queued_job(Job *);
1.101 ! espie 243: static void token(Job *, FILE *);
! 244: static void print_partial_buffer(struct job_pipe *, Job *, FILE *, size_t);
! 245: static void print_partial_buffer_and_shift(struct job_pipe *, Job *, FILE *,
! 246: size_t);
! 247: static bool print_complete_lines(struct job_pipe *, Job *, FILE *, size_t);
! 248: static void prepare_pipe(struct job_pipe *, int *);
! 249: static void handle_job_output(Job *, int, bool);
! 250: static void register_error(int, Job *);
1.93 espie 251:
1.101 ! espie 252: static void
! 253: register_error(int status, Job *job)
! 254: {
! 255: struct error_info *p;
1.1 deraadt 256:
1.101 ! espie 257: errors++;
! 258: p = emalloc(sizeof(struct error_info));
! 259: p->status = status;
! 260: p->name = job->node->name;
! 261: if (p)
! 262: Lst_AtEnd(&errorsList, p);
! 263: }
1.93 espie 264:
1.101 ! espie 265: void
! 266: print_errors()
1.88 espie 267: {
1.101 ! espie 268: LstNode ln;
! 269: struct error_info *p;
1.88 espie 270:
1.101 ! espie 271: for (ln = Lst_First(&errorsList); ln != NULL; ln = Lst_Adv(ln)) {
! 272: p = (struct error_info *)Lst_Datum(ln);
! 273: if (WIFEXITED(p->status)) {
! 274: Error("\tExit status %d in target %s",
! 275: WEXITSTATUS(p->status), p->name);
! 276: } else if (WIFSIGNALED(p->status)) {
! 277: Error("\tReceived signal %d in target s",
! 278: WTERMSIG(p->status), p->name);
! 279: } else {
! 280: Error("\tStatus %d in target %s", p->status, p->name);
! 281: }
! 282: }
1.88 espie 283: }
284:
1.57 espie 285: static void
1.101 ! espie 286: token(Job *job, FILE *out)
1.57 espie 287: {
1.101 ! espie 288: if (job->node != lastNode) {
! 289: if (DEBUG(JOBTOKEN))
! 290: (void)fprintf(out, "--- %s ---\n", job->node->name);
! 291: lastNode = job->node;
1.57 espie 292: }
293: }
294:
295: static void
1.93 espie 296: handle_all_signals()
1.57 espie 297: {
1.93 espie 298: if (got_signal)
299: got_signal = 0;
300: else
301: return;
302:
1.57 espie 303: if (got_SIGINT) {
304: got_SIGINT=0;
1.93 espie 305: handle_signal(SIGINT);
1.57 espie 306: }
307: if (got_SIGHUP) {
308: got_SIGHUP=0;
1.93 espie 309: handle_signal(SIGHUP);
1.57 espie 310: }
311: if (got_SIGQUIT) {
312: got_SIGQUIT=0;
1.93 espie 313: handle_signal(SIGQUIT);
1.57 espie 314: }
315: if (got_SIGTERM) {
316: got_SIGTERM=0;
1.93 espie 317: handle_signal(SIGTERM);
1.57 espie 318: }
319: if (got_SIGTSTP) {
320: got_SIGTSTP=0;
1.93 espie 321: handle_signal(SIGTSTP);
1.57 espie 322: }
323: if (got_SIGTTOU) {
324: got_SIGTTOU=0;
1.93 espie 325: handle_signal(SIGTTOU);
1.57 espie 326: }
327: if (got_SIGTTIN) {
328: got_SIGTTIN=0;
1.93 espie 329: handle_signal(SIGTTIN);
1.57 espie 330: }
331: if (got_SIGWINCH) {
332: got_SIGWINCH=0;
1.93 espie 333: handle_signal(SIGWINCH);
1.57 espie 334: }
335: }
336:
1.1 deraadt 337: /*-
338: *-----------------------------------------------------------------------
339: * JobCondPassSig --
1.50 espie 340: * Pass a signal to a job if USE_PGRP
1.1 deraadt 341: * is defined.
342: *
343: * Side Effects:
344: * None, except the job may bite it.
345: *-----------------------------------------------------------------------
346: */
1.27 espie 347: static void
1.93 espie 348: pass_signal_to_job(void *jobp, /* Job to biff */
1.56 espie 349: void *signop) /* Signal to send it */
1.1 deraadt 350: {
1.66 espie 351: Job *job = (Job *)jobp;
352: int signo = *(int *)signop;
353: if (DEBUG(JOB)) {
354: (void)fprintf(stdout,
1.93 espie 355: "pass_signal_to_job passing signal %d to child %ld.\n",
1.66 espie 356: signo, (long)job->pid);
357: (void)fflush(stdout);
358: }
359: KILL(job->pid, signo);
1.1 deraadt 360: }
361:
362: /*-
363: *-----------------------------------------------------------------------
1.94 espie 364: * handle_signal --
1.68 espie 365: * Pass a signal to all local jobs if USE_PGRP is defined,
1.50 espie 366: * then die ourselves.
1.1 deraadt 367: *
368: * Side Effects:
369: * We die by the same signal.
370: *-----------------------------------------------------------------------
371: */
372: static void
1.93 espie 373: handle_signal(int signo) /* The signal number we've received */
1.1 deraadt 374: {
1.66 espie 375: sigset_t nmask, omask;
376: struct sigaction act;
1.6 millert 377:
1.66 espie 378: if (DEBUG(JOB)) {
1.93 espie 379: (void)fprintf(stdout, "handle_signal(%d) called.\n", signo);
1.66 espie 380: (void)fflush(stdout);
381: }
1.95 espie 382: Lst_ForEach(&runningJobs, pass_signal_to_job, &signo);
1.66 espie 383:
384: /*
385: * Deal with proper cleanup based on the signal received. We only run
386: * the .INTERRUPT target if the signal was in fact an interrupt. The
387: * other three termination signals are more of a "get out *now*"
388: * command.
389: */
390: if (signo == SIGINT) {
391: JobInterrupt(true, signo);
392: } else if (signo == SIGHUP || signo == SIGTERM || signo == SIGQUIT) {
393: JobInterrupt(false, signo);
394: }
1.1 deraadt 395:
1.66 espie 396: /*
397: * Leave gracefully if SIGQUIT, rather than core dumping.
398: */
399: if (signo == SIGQUIT) {
400: Finish(0);
401: }
1.6 millert 402:
1.66 espie 403: /*
404: * Send ourselves the signal now we've given the message to everyone
405: * else. Note we block everything else possible while we're getting
406: * the signal. This ensures that all our jobs get continued when we
407: * wake up before we take any other signal.
408: */
409: sigemptyset(&nmask);
410: sigaddset(&nmask, signo);
411: sigprocmask(SIG_SETMASK, &nmask, &omask);
412: memset(&act, 0, sizeof act);
413: act.sa_handler = SIG_DFL;
414: sigemptyset(&act.sa_mask);
415: act.sa_flags = 0;
416: sigaction(signo, &act, NULL);
1.6 millert 417:
1.66 espie 418: if (DEBUG(JOB)) {
419: (void)fprintf(stdout,
1.93 espie 420: "handle_signal passing signal to self, mask = %x.\n",
1.66 espie 421: ~0 & ~(1 << (signo-1)));
422: (void)fflush(stdout);
423: }
424: (void)signal(signo, SIG_DFL);
1.1 deraadt 425:
1.66 espie 426: (void)KILL(getpid(), signo);
1.1 deraadt 427:
1.66 espie 428: signo = SIGCONT;
1.95 espie 429: Lst_ForEach(&runningJobs, pass_signal_to_job, &signo);
1.1 deraadt 430:
1.66 espie 431: (void)sigprocmask(SIG_SETMASK, &omask, NULL);
432: sigprocmask(SIG_SETMASK, &omask, NULL);
433: act.sa_handler = SigHandler;
434: sigaction(signo, &act, NULL);
1.1 deraadt 435: }
436:
437: /*-
438: *-----------------------------------------------------------------------
439: * JobCmpPid --
440: * Compare the pid of the job with the given pid and return 0 if they
441: * are equal. This function is called from Job_CatchChildren via
442: * Lst_Find to find the job descriptor of the finished job.
443: *
444: * Results:
445: * 0 if the pid's match
446: *-----------------------------------------------------------------------
447: */
448: static int
1.56 espie 449: JobCmpPid(void *job, /* job to examine */
450: void *pid) /* process id desired */
1.1 deraadt 451: {
1.66 espie 452: return *(pid_t *)pid - ((Job *)job)->pid;
1.1 deraadt 453: }
454:
1.69 espie 455: static void
1.84 espie 456: debug_printf(const char *fmt, ...)
457: {
458: if (DEBUG(JOB)) {
459: va_list va;
460:
461: va_start(va, fmt);
462: (void)vfprintf(stdout, fmt, va);
463: fflush(stdout);
464: va_end(va);
465: }
466: }
467:
1.1 deraadt 468: /*-
469: *-----------------------------------------------------------------------
1.2 deraadt 470: * JobClose --
471: * Called to close both input and output pipes when a job is finished.
472: *
473: * Side Effects:
474: * The file descriptors associated with the job are closed.
475: *-----------------------------------------------------------------------
476: */
477: static void
1.56 espie 478: JobClose(Job *job)
1.2 deraadt 479: {
1.101 ! espie 480: int i;
! 481:
! 482: for (i = 0; i < 2; i++) {
! 483: FD_CLR(job->in[i].fd, outputsp);
! 484: handle_job_output(job, i, true);
! 485: (void)close(job->in[i].fd);
1.66 espie 486: }
1.1 deraadt 487: }
488:
489: /*-
490: *-----------------------------------------------------------------------
491: * JobFinish --
492: * Do final processing for the given job including updating
493: * parents and starting new jobs as available/necessary. Note
494: * that we pay no attention to the JOB_IGNERR flag here.
495: * This is because when we're called because of a noexecute flag
496: * or something, jstat.w_status is 0 and when called from
497: * Job_CatchChildren, the status is zeroed if it s/b ignored.
498: *
499: * Side Effects:
500: * Some nodes may be put on the toBeMade queue.
1.78 espie 501: * Final commands for the job are placed on end_node.
1.1 deraadt 502: *
1.6 millert 503: * If we got an error and are aborting (aborting == ABORT_ERROR) and
1.1 deraadt 504: * the job list is now empty, we are done for the day.
1.101 ! espie 505: * If we recognized an error we set the aborting flag
1.1 deraadt 506: * to ABORT_ERROR so no more jobs will be started.
507: *-----------------------------------------------------------------------
508: */
509: /*ARGSUSED*/
510: static void
1.101 ! espie 511: JobFinish(Job *job, int status)
1.2 deraadt 512: {
1.78 espie 513: bool done;
1.2 deraadt 514:
1.101 ! espie 515: if ((WIFEXITED(status) &&
! 516: WEXITSTATUS(status) != 0 && !(job->flags & JOB_IGNERR)) ||
! 517: (WIFSIGNALED(status) && WTERMSIG(status) != SIGCONT)) {
1.66 espie 518: /*
519: * If it exited non-zero and either we're doing things our
520: * way or we're not ignoring errors, the job is finished.
521: * Similarly, if the shell died because of a signal
522: * the job is also finished. In these
523: * cases, finish out the job's output before printing the exit
524: * status...
525: */
526: JobClose(job);
527: done = true;
1.101 ! espie 528: } else if (WIFEXITED(status)) {
1.66 espie 529: /*
530: * Deal with ignored errors in -B mode. We need to print a
531: * message telling of the ignored error as well as setting
532: * status.w_status to 0 so the next command gets run. To do
533: * this, we set done to be true if in -B mode and the job
534: * exited non-zero.
535: */
1.101 ! espie 536: done = WEXITSTATUS(status) != 0;
1.66 espie 537: /*
538: * Old comment said: "Note we don't want to close down any of
539: * the streams until we know we're at the end." But we do.
540: * Otherwise when are we going to print the rest of the stuff?
541: */
542: JobClose(job);
543: } else {
544: /*
545: * No need to close things down or anything.
546: */
547: done = false;
1.1 deraadt 548: }
1.6 millert 549:
1.66 espie 550: if (done ||
1.101 ! espie 551: WIFSTOPPED(status) ||
! 552: (WIFSIGNALED(status) && WTERMSIG(status) == SIGCONT) ||
1.66 espie 553: DEBUG(JOB)) {
1.101 ! espie 554: if (WIFEXITED(status)) {
1.84 espie 555: debug_printf("Process %ld exited.\n", (long)job->pid);
1.101 ! espie 556: if (WEXITSTATUS(status) != 0) {
! 557: token(job, stdout);
! 558: (void)fprintf(stdout, "*** Error code %d%s\n",
! 559: WEXITSTATUS(status),
1.68 espie 560: (job->flags & JOB_IGNERR) ? "(ignored)" :
1.66 espie 561: "");
562:
563: if (job->flags & JOB_IGNERR) {
1.101 ! espie 564: status = 0;
1.66 espie 565: }
566: } else if (DEBUG(JOB)) {
1.101 ! espie 567: token(job, stdout);
! 568: (void)fprintf(stdout,
1.66 espie 569: "*** Completed successfully\n");
570: }
1.101 ! espie 571: } else if (WIFSTOPPED(status)) {
1.84 espie 572: debug_printf("Process %ld stopped.\n", (long)job->pid);
1.101 ! espie 573: token(job, stdout);
! 574: (void)fprintf(stdout, "*** Stopped -- signal %d\n",
! 575: WSTOPSIG(status));
1.66 espie 576: job->flags |= JOB_RESUME;
577: Lst_AtEnd(&stoppedJobs, job);
1.101 ! espie 578: (void)fflush(stdout);
1.66 espie 579: return;
1.101 ! espie 580: } else if (WTERMSIG(status) == SIGCONT) {
1.66 espie 581: /*
582: * If the beastie has continued, shift the Job from the
583: * stopped list to the running one (or re-stop it if
584: * concurrency is exceeded) and go and get another
585: * child.
586: */
587: if (job->flags & (JOB_RESUME|JOB_RESTART)) {
1.101 ! espie 588: token(job, stdout);
! 589: (void)fprintf(stdout, "*** Continued\n");
1.66 espie 590: }
591: if (!(job->flags & JOB_CONTINUING)) {
1.84 espie 592: debug_printf(
593: "Warning: "
594: "process %ld was not continuing.\n",
595: (long)job->pid);
1.66 espie 596: #if 0
597: /*
598: * We don't really want to restart a job from
599: * scratch just because it continued,
600: * especially not without killing the
601: * continuing process! That's why this is
602: * ifdef'ed out. FD - 9/17/90
603: */
604: JobRestart(job);
1.2 deraadt 605: #endif
1.66 espie 606: }
607: job->flags &= ~JOB_CONTINUING;
1.95 espie 608: Lst_AtEnd(&runningJobs, job);
1.67 espie 609: nJobs++;
1.84 espie 610: debug_printf("Process %ld is continuing locally.\n",
611: (long)job->pid);
1.66 espie 612: if (nJobs == maxJobs) {
613: jobFull = true;
1.84 espie 614: debug_printf("Job queue is full.\n");
1.66 espie 615: }
1.101 ! espie 616: (void)fflush(stdout);
1.66 espie 617: return;
618: } else {
1.101 ! espie 619: token(job, stdout);
! 620: (void)fprintf(stdout, "*** Signal %d\n",
! 621: WTERMSIG(status));
1.40 espie 622: }
1.66 espie 623:
1.101 ! espie 624: (void)fflush(stdout);
1.1 deraadt 625: }
626:
1.85 espie 627: done = true;
1.1 deraadt 628:
1.66 espie 629: if (done &&
630: aborting != ABORT_ERROR &&
631: aborting != ABORT_INTERRUPT &&
1.101 ! espie 632: status == 0) {
1.66 espie 633: /* As long as we aren't aborting and the job didn't return a
634: * non-zero status that we shouldn't ignore, we call
1.101 ! espie 635: * Make_Update to update the parents. */
1.66 espie 636: job->node->made = MADE;
637: Make_Update(job->node);
638: free(job);
1.101 ! espie 639: } else if (status != 0) {
! 640: register_error(status, job);
1.66 espie 641: free(job);
642: }
1.1 deraadt 643:
1.66 espie 644: JobRestartJobs();
1.1 deraadt 645:
646: /*
1.66 espie 647: * Set aborting if any error.
1.1 deraadt 648: */
1.101 ! espie 649: if (errors && !keepgoing &&
! 650: aborting != ABORT_INTERRUPT) {
1.66 espie 651: /*
652: * If we found any errors in this batch of children and the -k
653: * flag wasn't given, we set the aborting flag so no more jobs
654: * get started.
655: */
656: aborting = ABORT_ERROR;
657: }
1.6 millert 658:
1.66 espie 659: if (aborting == ABORT_ERROR && Job_Empty()) {
660: /*
661: * If we are aborting and the job table is now empty, we finish.
662: */
663: Finish(errors);
664: }
1.1 deraadt 665: }
666:
1.101 ! espie 667: static void
! 668: prepare_pipe(struct job_pipe *p, int *fd)
! 669: {
! 670: p->pos = 0;
! 671: (void)fcntl(fd[0], F_SETFD, FD_CLOEXEC);
! 672: p->fd = fd[0];
! 673: close(fd[1]);
! 674:
! 675: if (outputsp == NULL || p->fd > outputsn) {
! 676: int fdn, ofdn;
! 677: fd_set *tmp;
! 678:
! 679: fdn = howmany(p->fd+1, NFDBITS);
! 680: ofdn = outputsn ? howmany(outputsn+1, NFDBITS) : 0;
! 681:
! 682: if (fdn != ofdn) {
! 683: tmp = recalloc(outputsp, fdn, sizeof(fd_mask));
! 684: if (tmp == NULL)
! 685: return;
! 686: outputsp = tmp;
! 687: }
! 688: outputsn = p->fd;
! 689: }
! 690: fcntl(p->fd, F_SETFL, O_NONBLOCK);
! 691: FD_SET(p->fd, outputsp);
! 692: }
! 693:
1.1 deraadt 694: /*-
695: *-----------------------------------------------------------------------
696: * JobExec --
697: * Execute the shell for the given job. Called from JobStart and
698: * JobRestart.
699: *
700: * Side Effects:
701: * A shell is executed, outputs is altered and the Job structure added
702: * to the job table.
703: *-----------------------------------------------------------------------
704: */
705: static void
1.101 ! espie 706: JobExec(Job *job)
1.1 deraadt 707: {
1.66 espie 708: pid_t cpid; /* ID of new child */
1.101 ! espie 709: int fds[4];
! 710: int *fdout = fds;
! 711: int *fderr = fds+2;
! 712: int result;
! 713: int i;
1.6 millert 714:
1.66 espie 715: if (DEBUG(JOB)) {
716: (void)fprintf(stdout, "Running %s\n", job->node->name);
717: (void)fflush(stdout);
1.1 deraadt 718: }
1.6 millert 719:
1.66 espie 720: /*
721: * Some jobs produce no output and it's disconcerting to have
722: * no feedback of their running (since they produce no output, the
723: * banner with their name in it never appears). This is an attempt to
724: * provide that feedback, even if nothing follows it.
725: */
1.101 ! espie 726: token(job, stdout);
! 727:
! 728: setup_engine();
! 729:
! 730: /* Create the pipe by which we'll get the shell's output.
! 731: */
! 732: if (pipe(fdout) == -1)
! 733: Punt("Cannot create pipe: %s", strerror(errno));
1.1 deraadt 734:
1.101 ! espie 735: if (pipe(fderr) == -1)
! 736: Punt("Cannot create pipe: %s", strerror(errno));
1.94 espie 737:
1.66 espie 738: if ((cpid = fork()) == -1) {
739: Punt("Cannot fork");
740: } else if (cpid == 0) {
1.6 millert 741:
1.101 ! espie 742: /* standard pipe code to route stdout and stderr */
! 743: close(fdout[0]);
! 744: if (dup2(fdout[1], 1) == -1)
! 745: Punt("Cannot dup2(outPipe): %s", strerror(errno));
! 746: if (fdout[1] != 1)
! 747: close(fdout[1]);
! 748: close(fderr[0]);
! 749: if (dup2(fderr[1], 2) == -1)
! 750: Punt("Cannot dup2(errPipe): %s", strerror(errno));
! 751: if (fderr[1] != 2)
! 752: close(fderr[1]);
1.1 deraadt 753:
754: #ifdef USE_PGRP
1.66 espie 755: /*
756: * We want to switch the child into a different process family
757: * so we can kill it and all its descendants in one fell swoop,
758: * by killing its process family, but not commit suicide.
759: */
1.2 deraadt 760: # if defined(SYSV)
1.66 espie 761: (void)setsid();
1.2 deraadt 762: # else
1.66 espie 763: (void)setpgid(0, getpid());
1.2 deraadt 764: # endif
765: #endif /* USE_PGRP */
1.1 deraadt 766:
1.101 ! espie 767: /* most cases won't return, but will exit directly */
! 768: result = run_gnode(job->node, 1);
! 769: switch(result) {
! 770: case MADE:
! 771: exit(0);
! 772: case ERROR:
! 773: exit(1);
! 774: default:
! 775: fprintf(stderr,
! 776: "Could not run gnode, returned %d\n", result);
! 777: exit(1);
! 778: }
1.66 espie 779: } else {
780: job->pid = cpid;
781:
1.101 ! espie 782: /* we set the current position in the buffers to the beginning
1.87 espie 783: * and mark another stream to watch in the outputs mask
784: */
1.101 ! espie 785: for (i = 0; i < 2; i++)
! 786: prepare_pipe(&job->in[i], fds+2*i);
1.1 deraadt 787: }
788:
1.48 espie 789: /*
1.66 espie 790: * Now the job is actually running, add it to the table.
1.48 espie 791: */
1.67 espie 792: nJobs++;
1.95 espie 793: Lst_AtEnd(&runningJobs, job);
1.66 espie 794: if (nJobs == maxJobs) {
795: jobFull = true;
1.1 deraadt 796: }
797: }
798:
1.96 espie 799: static void
800: start_queued_job(Job *job)
801: {
802: if (DEBUG(JOB)) {
803: (void)fprintf(stdout, "Restarting %s...",
804: job->node->name);
805: (void)fflush(stdout);
806: }
807: if (nJobs >= maxJobs && !(job->flags & JOB_SPECIAL)) {
808: /*
809: * Can't be exported and not allowed to run locally --
810: * put it back on the hold queue and mark the table
811: * full
812: */
813: debug_printf("holding\n");
814: Lst_AtFront(&stoppedJobs, job);
815: jobFull = true;
816: debug_printf("Job queue is full.\n");
817: return;
818: } else {
819: /*
820: * Job may be run locally.
821: */
822: debug_printf("running locally\n");
823: }
1.101 ! espie 824: JobExec(job);
1.96 espie 825: }
826:
1.1 deraadt 827: /*-
828: *-----------------------------------------------------------------------
829: * JobRestart --
1.6 millert 830: * Restart a job that stopped for some reason.
1.1 deraadt 831: *
832: * Side Effects:
833: * jobFull will be set if the job couldn't be run.
834: *-----------------------------------------------------------------------
835: */
836: static void
1.56 espie 837: JobRestart(Job *job)
1.1 deraadt 838: {
1.66 espie 839: if (job->flags & JOB_RESTART) {
1.96 espie 840: start_queued_job(job);
1.66 espie 841: } else {
1.1 deraadt 842: /*
1.66 espie 843: * The job has stopped and needs to be restarted. Why it
844: * stopped, we don't know...
1.1 deraadt 845: */
1.84 espie 846: debug_printf("Resuming %s...", job->node->name);
1.83 espie 847: if ((nJobs < maxJobs || ((job->flags & JOB_SPECIAL) &&
848: maxJobs == 0)) && nJobs != maxJobs) {
1.66 espie 849: /*
1.79 espie 850: * If we haven't reached the concurrency limit already
1.83 espie 851: * (or maxJobs is 0), it's ok to resume the job.
1.66 espie 852: */
853: bool error;
1.101 ! espie 854: int status = 0;
1.66 espie 855:
856: error = KILL(job->pid, SIGCONT) != 0;
857:
858: if (!error) {
859: /*
860: * Make sure the user knows we've continued the
861: * beast and actually put the thing in the job
862: * table.
863: */
864: job->flags |= JOB_CONTINUING;
865: W_SETTERMSIG(&status, SIGCONT);
1.101 ! espie 866: JobFinish(job, status);
1.66 espie 867:
868: job->flags &= ~(JOB_RESUME|JOB_CONTINUING);
1.84 espie 869: debug_printf("done\n");
1.66 espie 870: } else {
871: Error("couldn't resume %s: %s",
872: job->node->name, strerror(errno));
873: W_SETEXITSTATUS(&status, 1);
1.101 ! espie 874: JobFinish(job, status);
1.66 espie 875: }
876: } else {
877: /*
878: * Job cannot be restarted. Mark the table as full and
879: * place the job back on the list of stopped jobs.
880: */
1.84 espie 881: debug_printf("table full\n");
1.66 espie 882: Lst_AtFront(&stoppedJobs, job);
883: jobFull = true;
1.84 espie 884: debug_printf("Job queue is full.\n");
1.1 deraadt 885: }
886: }
887: }
888:
1.98 espie 889: static Job *
890: prepare_job(GNode *gn, int flags)
1.78 espie 891: {
892: Job *job; /* new job descriptor */
893: bool cmdsOK; /* true if the nodes commands were all right */
894: bool noExec; /* Set true if we decide not to run the job */
1.66 espie 895:
1.86 espie 896: job = emalloc(sizeof(Job));
897: if (job == NULL) {
898: Punt("JobStart out of memory");
1.1 deraadt 899: }
900:
1.66 espie 901: job->node = gn;
1.1 deraadt 902:
903: /*
1.66 espie 904: * Set the initial value of the flags for this job based on the global
905: * ones and the node's attributes... Any flags supplied by the caller
906: * are also added to the field.
1.1 deraadt 907: */
1.87 espie 908: job->flags = flags;
1.66 espie 909: if (Targ_Ignore(gn)) {
910: job->flags |= JOB_IGNERR;
911: }
912: if (Targ_Silent(gn)) {
913: job->flags |= JOB_SILENT;
1.1 deraadt 914: }
1.6 millert 915:
1.1 deraadt 916: /*
1.66 espie 917: * Check the commands now so any attributes from .DEFAULT have a chance
918: * to migrate to the node
1.1 deraadt 919: */
1.87 espie 920: cmdsOK = Job_CheckCommands(gn, Error);
1.1 deraadt 921:
922: /*
1.66 espie 923: * If the -n flag wasn't given, we open up OUR (not the child's)
924: * temporary file to stuff commands in it. The thing is rd/wr so we
925: * don't need to reopen it to feed it to the shell. If the -n flag
926: * *was* given, we just set the file to be stdout. Cute, huh?
1.1 deraadt 927: */
1.66 espie 928: if ((gn->type & OP_MAKE) || (!noExecute && !touchFlag)) {
929: /*
930: * We're serious here, but if the commands were bogus, we're
931: * also dead...
932: */
933: if (!cmdsOK) {
934: DieHorribly();
935: }
1.6 millert 936:
1.101 ! espie 937: if (Lst_IsEmpty(&gn->commands))
! 938: noExec = true;
! 939: else
! 940: noExec = false;
1.66 espie 941:
1.101 ! espie 942: } else if (noExecute) {
! 943: if (!cmdsOK || Lst_IsEmpty(&gn->commands))
1.85 espie 944: noExec = true;
1.101 ! espie 945: else
! 946: noExec = false;
1.66 espie 947: } else {
948: /*
949: * Just touch the target and note that no shell should be
1.101 ! espie 950: * executed. Check
1.66 espie 951: * the commands, too, but don't die if they're no good -- it
952: * does no harm to keep working up the graph.
1.30 espie 953: */
1.87 espie 954: Job_Touch(gn, job->flags & JOB_SILENT);
1.41 espie 955: noExec = true;
1.1 deraadt 956: }
1.66 espie 957:
1.1 deraadt 958: /*
1.66 espie 959: * If we're not supposed to execute a shell, don't.
1.1 deraadt 960: */
1.66 espie 961: if (noExec) {
962: /*
963: * We only want to work our way up the graph if we aren't here
964: * because the commands for the job were no good.
965: */
966: if (cmdsOK) {
967: if (aborting == 0) {
968: Make_Update(job->node);
969: }
970: }
1.99 espie 971: free(job);
972: return NULL;
1.1 deraadt 973: } else {
1.98 espie 974: return job;
1.1 deraadt 975: }
1.98 espie 976: }
1.1 deraadt 977:
1.98 espie 978: /*-
979: *-----------------------------------------------------------------------
980: * JobStart --
981: * Start a target-creation process going for the target described
982: * by the graph node gn.
983: *
984: * Side Effects:
985: * A new Job node is created and added to the list of running
986: * jobs. PMake is forked and a child shell created.
987: *-----------------------------------------------------------------------
988: */
989: static void
990: JobStart(GNode *gn, /* target to create */
991: int flags) /* flags for the job to override normal ones.
992: * e.g. JOB_SPECIAL */
993: {
994: Job *job;
995: job = prepare_job(gn, flags);
996: if (!job)
997: return;
1.83 espie 998: if (nJobs >= maxJobs && !(job->flags & JOB_SPECIAL) &&
999: maxJobs != 0) {
1.79 espie 1000: /*
1001: * The job can only be run locally, but we've hit the limit of
1002: * local concurrency, so put the job on hold until some other
1003: * job finishes. Note that the special jobs (.BEGIN, .INTERRUPT
1004: * and .END) may be run locally even when the local limit has
1.83 espie 1005: * been reached (e.g. when maxJobs == 0), though they will be
1.79 espie 1006: * exported if at all possible. In addition, any target marked
1.83 espie 1007: * with .NOEXPORT will be run locally if maxJobs is 0.
1.66 espie 1008: */
1009: jobFull = true;
1.6 millert 1010:
1.84 espie 1011: debug_printf("Can only run job locally.\n");
1.66 espie 1012: job->flags |= JOB_RESTART;
1013: Lst_AtEnd(&stoppedJobs, job);
1.79 espie 1014: } else {
1.83 espie 1015: if (nJobs >= maxJobs) {
1.79 espie 1016: /*
1017: * If we're running this job locally as a special case
1018: * (see above), at least say the table is full.
1019: */
1020: jobFull = true;
1.84 espie 1021: debug_printf("Local job queue is full.\n");
1.79 espie 1022: }
1.101 ! espie 1023: JobExec(job);
1.1 deraadt 1024: }
1025: }
1026:
1.101 ! espie 1027: /* Helper functions for JobDoOutput */
! 1028:
! 1029:
! 1030: /* output debugging token and print characters from 0 to endpos */
! 1031: static void
! 1032: print_partial_buffer(struct job_pipe *p, Job *job, FILE *out, size_t endPos)
1.2 deraadt 1033: {
1.101 ! espie 1034: size_t i;
1.2 deraadt 1035:
1.101 ! espie 1036: token(job, out);
! 1037: for (i = 0; i < endPos; i++)
! 1038: putc(p->buffer[i], out);
! 1039: }
! 1040:
! 1041: /* print partial buffer and shift remaining contents */
! 1042: static void
! 1043: print_partial_buffer_and_shift(struct job_pipe *p, Job *job, FILE *out,
! 1044: size_t endPos)
! 1045: {
! 1046: size_t i;
! 1047:
! 1048: print_partial_buffer(p, job, out, endPos);
! 1049:
! 1050: for (i = endPos; i < p->pos; i++)
! 1051: p->buffer[i-endPos] = p->buffer[i];
! 1052: p->pos -= endPos;
! 1053: }
! 1054:
! 1055: /* print complete lines, looking back to the limit position
! 1056: * (stuff before limit was already scanned).
! 1057: * returns true if something was printed.
! 1058: */
! 1059: static bool
! 1060: print_complete_lines(struct job_pipe *p, Job *job, FILE *out, size_t limit)
! 1061: {
! 1062: size_t i;
! 1063:
! 1064: for (i = p->pos; i > limit; i--) {
! 1065: if (p->buffer[i-1] == '\n') {
! 1066: print_partial_buffer_and_shift(p, job, out, i);
! 1067: return true;
1.2 deraadt 1068: }
1069: }
1.101 ! espie 1070: return false;
1.2 deraadt 1071: }
1.1 deraadt 1072: /*-
1073: *-----------------------------------------------------------------------
1.101 ! espie 1074: * handle_pipe --
1.89 espie 1075: * This functions is called whenever there is something to read on the
1076: * pipe. We collect more output from the given job and store it in the
1.101 ! espie 1077: * job's outBuf. If this makes up lines, we print it tagged by the job's
1.89 espie 1078: * identifier, as necessary.
1.1 deraadt 1079: *
1080: * Side Effects:
1081: * curPos may be shifted as may the contents of outBuf.
1082: *-----------------------------------------------------------------------
1083: */
1.48 espie 1084: static void
1.101 ! espie 1085: handle_pipe(struct job_pipe *p,
! 1086: Job *job, FILE *out, bool finish)
1.66 espie 1087: {
1088: int nr; /* number of bytes read */
1.101 ! espie 1089: int oldpos; /* optimization */
1.1 deraadt 1090:
1.101 ! espie 1091: /* want to get everything ? -> we block */
! 1092: if (finish)
! 1093: fcntl(p->fd, F_SETFL, 0);
! 1094:
! 1095: do {
! 1096: nr = read(p->fd, &p->buffer[p->pos],
! 1097: JOB_BUFSIZE - p->pos);
! 1098: if (nr == -1) {
! 1099: if (errno == EAGAIN)
! 1100: break;
! 1101: if (DEBUG(JOB)) {
! 1102: perror("JobDoOutput(piperead)");
! 1103: }
1.66 espie 1104: }
1.101 ! espie 1105: oldpos = p->pos;
! 1106: p->pos += nr;
! 1107: if (!print_complete_lines(p, job, out, oldpos))
! 1108: if (p->pos == JOB_BUFSIZE) {
! 1109: print_partial_buffer(p, job, out, p->pos);
! 1110: p->pos = 0;
! 1111: }
! 1112: } while (nr != 0);
1.1 deraadt 1113:
1.101 ! espie 1114: /* at end of file, we print whatever is left */
! 1115: if (nr == 0) {
! 1116: print_partial_buffer(p, job, out, p->pos);
! 1117: if (p->pos > 0 && p->buffer[p->pos - 1] != '\n')
! 1118: putchar('\n');
! 1119: p->pos = 0;
1.76 espie 1120: }
1.101 ! espie 1121: }
1.6 millert 1122:
1.101 ! espie 1123: static void
! 1124: handle_job_output(Job *job, int i, bool finish)
! 1125: {
! 1126: handle_pipe(&job->in[i], job, i == 0 ? stdout : stderr, finish);
1.1 deraadt 1127: }
1128:
1129: /*-
1130: *-----------------------------------------------------------------------
1131: * Job_CatchChildren --
1132: * Handle the exit of a child. Called from Make_Make.
1133: *
1134: * Side Effects:
1135: * The job descriptor is removed from the list of children.
1136: *
1137: * Notes:
1138: * We do waits, blocking or not, according to the wisdom of our
1139: * caller, until there are no more children to report. For each
1140: * job, call JobFinish to finish things off. This will take care of
1141: * putting jobs on the stoppedJobs queue.
1142: *-----------------------------------------------------------------------
1143: */
1144: void
1.76 espie 1145: Job_CatchChildren()
1.1 deraadt 1146: {
1.78 espie 1147: pid_t pid; /* pid of dead child */
1148: Job *job; /* job descriptor for dead child */
1149: LstNode jnode; /* list element for finding job */
1150: int status; /* Exit/termination status */
1.1 deraadt 1151:
1.66 espie 1152: /*
1153: * Don't even bother if we know there's no one around.
1154: */
1.83 espie 1155: if (nJobs == 0) {
1.66 espie 1156: return;
1.2 deraadt 1157: }
1.6 millert 1158:
1.76 espie 1159: while ((pid = waitpid((pid_t) -1, &status, WNOHANG|WUNTRACED)) > 0) {
1.93 espie 1160: handle_all_signals();
1.84 espie 1161: debug_printf("Process %ld exited or stopped.\n", (long)pid);
1.1 deraadt 1162:
1.95 espie 1163: jnode = Lst_Find(&runningJobs, JobCmpPid, &pid);
1.1 deraadt 1164:
1.18 espie 1165: if (jnode == NULL) {
1.68 espie 1166: if (WIFSIGNALED(status) &&
1.66 espie 1167: (WTERMSIG(status) == SIGCONT)) {
1168: jnode = Lst_Find(&stoppedJobs, JobCmpPid, &pid);
1169: if (jnode == NULL) {
1170: Error("Resumed child (%ld) not in table", (long)pid);
1171: continue;
1172: }
1173: job = (Job *)Lst_Datum(jnode);
1174: Lst_Remove(&stoppedJobs, jnode);
1175: } else {
1176: Error("Child (%ld) not in table?", (long)pid);
1177: continue;
1178: }
1179: } else {
1180: job = (Job *)Lst_Datum(jnode);
1.95 espie 1181: Lst_Remove(&runningJobs, jnode);
1.67 espie 1182: nJobs--;
1.84 espie 1183: if (jobFull)
1184: debug_printf("Job queue is no longer full.\n");
1.66 espie 1185: jobFull = false;
1.1 deraadt 1186: }
1.66 espie 1187:
1.101 ! espie 1188: JobFinish(job, status);
1.1 deraadt 1189: }
1190: }
1191:
1192: /*-
1193: *-----------------------------------------------------------------------
1194: * Job_CatchOutput --
1195: * Catch the output from our children, if we're using
1196: * pipes do so. Otherwise just block time until we get a
1.6 millert 1197: * signal (most likely a SIGCHLD) since there's no point in
1.1 deraadt 1198: * just spinning when there's nothing to do and the reaping
1.6 millert 1199: * of a child can wait for a while.
1.1 deraadt 1200: *
1201: * Side Effects:
1202: * Output is read from pipes if we're piping.
1203: * -----------------------------------------------------------------------
1204: */
1205: void
1.56 espie 1206: Job_CatchOutput(void)
1.1 deraadt 1207: {
1.66 espie 1208: int nfds;
1209: struct timeval timeout;
1210: LstNode ln;
1211: Job *job;
1.101 ! espie 1212: int i;
1.66 espie 1213:
1.76 espie 1214: int count = howmany(outputsn+1, NFDBITS) * sizeof(fd_mask);
1215: fd_set *readfdsp = malloc(count);
1.91 espie 1216:
1.77 espie 1217: (void)fflush(stdout);
1.76 espie 1218: if (readfdsp == NULL)
1219: return;
1220:
1221: memcpy(readfdsp, outputsp, count);
1222: timeout.tv_sec = SEL_SEC;
1223: timeout.tv_usec = SEL_USEC;
1.66 espie 1224:
1.91 espie 1225: nfds = select(outputsn+1, readfdsp, NULL, NULL, &timeout);
1.93 espie 1226: handle_all_signals();
1.91 espie 1227: if (nfds > 0) {
1.95 espie 1228: for (ln = Lst_First(&runningJobs); nfds && ln != NULL;
1.76 espie 1229: ln = Lst_Adv(ln)) {
1230: job = (Job *)Lst_Datum(ln);
1.101 ! espie 1231: for (i = 0; i < 2; i++) {
! 1232: if (FD_ISSET(job->in[i].fd, readfdsp)) {
! 1233: handle_job_output(job, i, false);
! 1234: nfds--;
! 1235: }
1.66 espie 1236: }
1.1 deraadt 1237: }
1238: }
1.76 espie 1239: free(readfdsp);
1.1 deraadt 1240: }
1241:
1242: /*-
1243: *-----------------------------------------------------------------------
1244: * Job_Make --
1245: * Start the creation of a target. Basically a front-end for
1246: * JobStart used by the Make module.
1247: *
1248: * Side Effects:
1249: * Another job is started.
1250: *-----------------------------------------------------------------------
1251: */
1252: void
1.56 espie 1253: Job_Make(GNode *gn)
1.1 deraadt 1254: {
1.86 espie 1255: (void)JobStart(gn, 0);
1.1 deraadt 1256: }
1257:
1258: /*-
1259: *-----------------------------------------------------------------------
1260: * Job_Init --
1261: * Initialize the process module
1262: *
1263: * Side Effects:
1264: * lists and counters are initialized
1265: *-----------------------------------------------------------------------
1266: */
1267: void
1.83 espie 1268: Job_Init(int maxproc)
1.1 deraadt 1269: {
1.95 espie 1270: Static_Lst_Init(&runningJobs);
1.66 espie 1271: Static_Lst_Init(&stoppedJobs);
1.96 espie 1272: Static_Lst_Init(&queuedJobs);
1.101 ! espie 1273: Static_Lst_Init(&errorsList);
1.66 espie 1274: maxJobs = maxproc;
1.79 espie 1275: nJobs = 0;
1.66 espie 1276: jobFull = false;
1.101 ! espie 1277: errors = 0;
1.66 espie 1278:
1279: aborting = 0;
1.40 espie 1280:
1.66 espie 1281: lastNode = NULL;
1.1 deraadt 1282:
1.78 espie 1283: if ((begin_node->type & OP_DUMMY) == 0) {
1.86 espie 1284: JobStart(begin_node, JOB_SPECIAL);
1.66 espie 1285: while (nJobs) {
1286: Job_CatchOutput();
1.76 espie 1287: Job_CatchChildren();
1.66 espie 1288: }
1.1 deraadt 1289: }
1290: }
1291:
1292: /*-
1293: *-----------------------------------------------------------------------
1294: * Job_Full --
1295: * See if the job table is full. It is considered full if it is OR
1296: * if we are in the process of aborting OR if we have
1297: * reached/exceeded our local quota. This prevents any more jobs
1298: * from starting up.
1299: *
1300: * Results:
1.41 espie 1301: * true if the job table is full, false otherwise
1.1 deraadt 1302: *-----------------------------------------------------------------------
1303: */
1.41 espie 1304: bool
1.56 espie 1305: Job_Full(void)
1.1 deraadt 1306: {
1.66 espie 1307: return aborting || jobFull;
1.1 deraadt 1308: }
1309:
1310: /*-
1311: *-----------------------------------------------------------------------
1312: * Job_Empty --
1.40 espie 1313: * See if the job table is empty. Because the local concurrency may
1.1 deraadt 1314: * be set to 0, it is possible for the job table to become empty,
1315: * while the list of stoppedJobs remains non-empty. In such a case,
1316: * we want to restart as many jobs as we can.
1317: *
1318: * Results:
1.41 espie 1319: * true if it is. false if it ain't.
1.1 deraadt 1320: * -----------------------------------------------------------------------
1321: */
1.41 espie 1322: bool
1.56 espie 1323: Job_Empty(void)
1.1 deraadt 1324: {
1.66 espie 1325: if (nJobs == 0) {
1326: if (!Lst_IsEmpty(&stoppedJobs) && !aborting) {
1327: /*
1328: * The job table is obviously not full if it has no
1329: * jobs in it...Try and restart the stopped jobs.
1330: */
1331: jobFull = false;
1332: JobRestartJobs();
1333: return false;
1334: } else {
1335: return true;
1336: }
1.1 deraadt 1337: } else {
1.66 espie 1338: return false;
1.1 deraadt 1339: }
1340: }
1341:
1342: /*-
1343: *-----------------------------------------------------------------------
1344: * JobInterrupt --
1345: * Handle the receipt of an interrupt.
1346: *
1347: * Side Effects:
1348: * All children are killed. Another job will be started if the
1349: * .INTERRUPT target was given.
1350: *-----------------------------------------------------------------------
1351: */
1352: static void
1.56 espie 1353: JobInterrupt(int runINTERRUPT, /* Non-zero if commands for the .INTERRUPT
1.1 deraadt 1354: * target should be executed */
1.66 espie 1355: int signo) /* signal received */
1.1 deraadt 1356: {
1.66 espie 1357: LstNode ln; /* element in job table */
1.78 espie 1358: Job *job; /* job descriptor in that element */
1.66 espie 1359:
1360: aborting = ABORT_INTERRUPT;
1361:
1.95 espie 1362: for (ln = Lst_First(&runningJobs); ln != NULL; ln = Lst_Adv(ln)) {
1.66 espie 1363: job = (Job *)Lst_Datum(ln);
1364:
1365: if (!Targ_Precious(job->node)) {
1366: const char *file = job->node->path == NULL ?
1367: job->node->name : job->node->path;
1368: if (!noExecute && eunlink(file) != -1) {
1369: Error("*** %s removed", file);
1370: }
1371: }
1372: if (job->pid) {
1.84 espie 1373: debug_printf("JobInterrupt passing signal to "
1374: "child %ld.\n", (long)job->pid);
1.66 espie 1375: KILL(job->pid, signo);
1376: }
1.2 deraadt 1377: }
1.1 deraadt 1378:
1.66 espie 1379: if (runINTERRUPT && !touchFlag) {
1.78 espie 1380: if ((interrupt_node->type & OP_DUMMY) == 0) {
1.66 espie 1381: ignoreErrors = false;
1382:
1.101 ! espie 1383: JobStart(interrupt_node, 0);
1.66 espie 1384: while (nJobs) {
1385: Job_CatchOutput();
1.76 espie 1386: Job_CatchChildren();
1.66 espie 1387: }
1388: }
1.1 deraadt 1389: }
1.66 espie 1390: exit(signo);
1.1 deraadt 1391: }
1392:
1393: /*
1394: *-----------------------------------------------------------------------
1.12 espie 1395: * Job_Finish --
1.1 deraadt 1396: * Do final processing such as the running of the commands
1.6 millert 1397: * attached to the .END target.
1.1 deraadt 1398: *
1399: * Results:
1400: * Number of errors reported.
1.40 espie 1401: *
1.1 deraadt 1402: *-----------------------------------------------------------------------
1403: */
1404: int
1.56 espie 1405: Job_Finish(void)
1.1 deraadt 1406: {
1.78 espie 1407: if (end_node != NULL && !Lst_IsEmpty(&end_node->commands)) {
1.66 espie 1408: if (errors) {
1409: Error("Errors reported so .END ignored");
1410: } else {
1.101 ! espie 1411: JobStart(end_node, JOB_SPECIAL);
1.1 deraadt 1412:
1.66 espie 1413: while (nJobs) {
1414: Job_CatchOutput();
1.76 espie 1415: Job_CatchChildren();
1.66 espie 1416: }
1417: }
1.1 deraadt 1418: }
1.66 espie 1419: return errors;
1.1 deraadt 1420: }
1421:
1.41 espie 1422: #ifdef CLEANUP
1.12 espie 1423: void
1.56 espie 1424: Job_End(void)
1.12 espie 1425: {
1.41 espie 1426: }
1.13 espie 1427: #endif
1.40 espie 1428:
1.1 deraadt 1429: /*-
1430: *-----------------------------------------------------------------------
1431: * Job_Wait --
1432: * Waits for all running jobs to finish and returns. Sets 'aborting'
1433: * to ABORT_WAIT to prevent other jobs from starting.
1434: *
1435: * Side Effects:
1436: * Currently running jobs finish.
1437: *
1438: *-----------------------------------------------------------------------
1439: */
1440: void
1.56 espie 1441: Job_Wait(void)
1.1 deraadt 1442: {
1.66 espie 1443: aborting = ABORT_WAIT;
1444: while (nJobs != 0) {
1445: Job_CatchOutput();
1.76 espie 1446: Job_CatchChildren();
1.66 espie 1447: }
1448: aborting = 0;
1.1 deraadt 1449: }
1450:
1451: /*-
1452: *-----------------------------------------------------------------------
1453: * Job_AbortAll --
1454: * Abort all currently running jobs without handling output or anything.
1455: * This function is to be called only in the event of a major
1456: * error. Most definitely NOT to be called from JobInterrupt.
1457: *
1458: * Side Effects:
1459: * All children are killed, not just the firstborn
1460: *-----------------------------------------------------------------------
1461: */
1462: void
1.56 espie 1463: Job_AbortAll(void)
1.1 deraadt 1464: {
1.66 espie 1465: LstNode ln; /* element in job table */
1466: Job *job; /* the job descriptor in that element */
1467: int foo;
1.6 millert 1468:
1.66 espie 1469: aborting = ABORT_ERROR;
1.6 millert 1470:
1.66 espie 1471: if (nJobs) {
1.95 espie 1472: for (ln = Lst_First(&runningJobs); ln != NULL;
1473: ln = Lst_Adv(ln)) {
1.66 espie 1474: job = (Job *)Lst_Datum(ln);
1475:
1476: /*
1477: * kill the child process with increasingly drastic
1478: * signals to make darn sure it's dead.
1479: */
1480: KILL(job->pid, SIGINT);
1481: KILL(job->pid, SIGKILL);
1482: }
1.1 deraadt 1483: }
1.6 millert 1484:
1.66 espie 1485: /*
1486: * Catch as many children as want to report in at first, then give up
1487: */
1488: while (waitpid(-1, &foo, WNOHANG) > 0)
1489: continue;
1.2 deraadt 1490: }
1.40 espie 1491:
1.2 deraadt 1492: /*-
1493: *-----------------------------------------------------------------------
1494: * JobRestartJobs --
1495: * Tries to restart stopped jobs if there are slots available.
1496: * Note that this tries to restart them regardless of pending errors.
1497: * It's not good to leave stopped jobs lying around!
1498: *
1499: * Side Effects:
1500: * Resumes(and possibly migrates) jobs.
1501: *-----------------------------------------------------------------------
1502: */
1503: static void
1.56 espie 1504: JobRestartJobs(void)
1.2 deraadt 1505: {
1.66 espie 1506: Job *job;
1.19 espie 1507:
1.66 espie 1508: while (!jobFull && (job = (Job *)Lst_DeQueue(&stoppedJobs)) != NULL) {
1.84 espie 1509: debug_printf("Job queue is not full. "
1510: "Restarting a stopped job.\n");
1.66 espie 1511: JobRestart(job);
1.2 deraadt 1512: }
1.1 deraadt 1513: }
![[BACK]](/icons/back.gif){kind=icon}
Return to job.c CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [local] / src / usr.bin / make