1 /* $NetBSD: job.c,v 1.190 2017/04/16 21:23:43 riastradh Exp $ */
4 * Copyright (c) 1988, 1989, 1990 The Regents of the University of California.
7 * This code is derived from software contributed to Berkeley by
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * Copyright (c) 1988, 1989 by Adam de Boor
37 * Copyright (c) 1989 by Berkeley Softworks
38 * All rights reserved.
40 * This code is derived from software contributed to Berkeley by
43 * Redistribution and use in source and binary forms, with or without
44 * modification, are permitted provided that the following conditions
46 * 1. Redistributions of source code must retain the above copyright
47 * notice, this list of conditions and the following disclaimer.
48 * 2. Redistributions in binary form must reproduce the above copyright
49 * notice, this list of conditions and the following disclaimer in the
50 * documentation and/or other materials provided with the distribution.
51 * 3. All advertising materials mentioning features or use of this software
52 * must display the following acknowledgement:
53 * This product includes software developed by the University of
54 * California, Berkeley and its contributors.
55 * 4. Neither the name of the University nor the names of its contributors
56 * may be used to endorse or promote products derived from this software
57 * without specific prior written permission.
59 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
60 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
61 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
62 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
63 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
64 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
65 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
66 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
67 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
68 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
73 static char rcsid[] = "$NetBSD: job.c,v 1.190 2017/04/16 21:23:43 riastradh Exp $";
75 #include <sys/cdefs.h>
78 static char sccsid[] = "@(#)job.c 8.2 (Berkeley) 3/19/94";
80 __RCSID("$NetBSD: job.c,v 1.190 2017/04/16 21:23:43 riastradh Exp $");
87 * handle the creation etc. of our child processes.
90 * Job_Make Start the creation of the given target.
92 * Job_CatchChildren Check for and handle the termination of any
93 * children. This must be called reasonably
94 * frequently to keep the whole make going at
95 * a decent clip, since job table entries aren't
96 * removed until their process is caught this way.
98 * Job_CatchOutput Print any output our children have produced.
99 * Should also be called fairly frequently to
100 * keep the user informed of what's going on.
101 * If no output is waiting, it will block for
102 * a time given by the SEL_* constants, below,
103 * or until output is ready.
105 * Job_Init Called to intialize this module. in addition,
106 * any commands attached to the .BEGIN target
107 * are executed before this function returns.
108 * Hence, the makefile must have been parsed
109 * before this function is called.
111 * Job_End Cleanup any memory used.
113 * Job_ParseShell Given the line following a .SHELL target, parse
114 * the line as a shell specification. Returns
115 * FAILURE if the spec was incorrect.
117 * Job_Finish Perform any final processing which needs doing.
118 * This includes the execution of any commands
119 * which have been/were attached to the .END
120 * target. It should only be called when the
121 * job table is empty.
123 * Job_AbortAll Abort all currently running jobs. It doesn't
124 * handle output or do anything for the jobs,
125 * just kills them. It should only be called in
126 * an emergency, as it were.
128 * Job_CheckCommands Verify that the commands for a target are
129 * ok. Provide them if necessary and possible.
131 * Job_Touch Update a target without really updating it.
133 * Job_Wait Wait for all currently-running jobs to finish.
139 #include <sys/types.h>
140 #include <sys/stat.h>
141 #include <sys/file.h>
142 #include <sys/time.h>
147 #if !defined(USE_SELECT) && defined(HAVE_POLL_H)
150 #ifndef USE_SELECT /* no poll.h */
153 #if defined(HAVE_SYS_SELECT_H)
154 # include <sys/select.h>
161 #if defined(HAVE_SYS_SOCKET_H)
162 # include <sys/socket.h>
169 #include "pathnames.h"
171 # define STATIC static
174 * FreeBSD: traditionally .MAKE is not required to
175 * pass jobs queue to sub-makes.
176 * Use .MAKE.ALWAYS_PASS_JOB_QUEUE=no to disable.
178 #define MAKE_ALWAYS_PASS_JOB_QUEUE ".MAKE.ALWAYS_PASS_JOB_QUEUE"
179 static int Always_pass_job_queue = TRUE;
181 * FreeBSD: aborting entire parallel make isn't always
182 * desired. When doing tinderbox for example, failure of
183 * one architecture should not stop all.
184 * We still want to bail on interrupt though.
186 #define MAKE_JOB_ERROR_TOKEN "MAKE_JOB_ERROR_TOKEN"
187 static int Job_error_token = TRUE;
190 * error handling variables
192 static int errors = 0; /* number of errors reported */
193 static int aborting = 0; /* why is the make aborting? */
194 #define ABORT_ERROR 1 /* Because of an error */
195 #define ABORT_INTERRUPT 2 /* Because it was interrupted */
196 #define ABORT_WAIT 3 /* Waiting for jobs to finish */
197 #define JOB_TOKENS "+EI+" /* Token to requeue for each abort state */
200 * this tracks the number of tokens currently "out" to build jobs.
202 int jobTokensRunning = 0;
203 int not_parallel = 0; /* set if .NOT_PARALLEL */
206 * XXX: Avoid SunOS bug... FILENO() is fp->_file, and file
207 * is a char! So when we go above 127 we turn negative!
209 #define FILENO(a) ((unsigned) fileno(a))
212 * post-make command processing. The node postCommands is really just the
213 * .END target but we keep it around to avoid having to search for it
216 static GNode *postCommands = NULL;
217 /* node containing commands to execute when
218 * everything else is done */
219 static int numCommands; /* The number of commands actually printed
220 * for a target. Should this number be
221 * 0, no shell will be executed. */
224 * Return values from JobStart.
226 #define JOB_RUNNING 0 /* Job is running */
227 #define JOB_ERROR 1 /* Error in starting the job */
228 #define JOB_FINISHED 2 /* The job is already finished */
231 * Descriptions for various shells.
233 * The build environment may set DEFSHELL_INDEX to one of
234 * DEFSHELL_INDEX_SH, DEFSHELL_INDEX_KSH, or DEFSHELL_INDEX_CSH, to
235 * select one of the prefedined shells as the default shell.
237 * Alternatively, the build environment may set DEFSHELL_CUSTOM to the
238 * name or the full path of a sh-compatible shell, which will be used as
241 * ".SHELL" lines in Makefiles can choose the default shell from the
242 # set defined here, or add additional shells.
245 #ifdef DEFSHELL_CUSTOM
246 #define DEFSHELL_INDEX_CUSTOM 0
247 #define DEFSHELL_INDEX_SH 1
248 #define DEFSHELL_INDEX_KSH 2
249 #define DEFSHELL_INDEX_CSH 3
250 #else /* !DEFSHELL_CUSTOM */
251 #define DEFSHELL_INDEX_SH 0
252 #define DEFSHELL_INDEX_KSH 1
253 #define DEFSHELL_INDEX_CSH 2
254 #endif /* !DEFSHELL_CUSTOM */
256 #ifndef DEFSHELL_INDEX
257 #define DEFSHELL_INDEX 0 /* DEFSHELL_INDEX_CUSTOM or DEFSHELL_INDEX_SH */
258 #endif /* !DEFSHELL_INDEX */
260 static Shell shells[] = {
261 #ifdef DEFSHELL_CUSTOM
263 * An sh-compatible shell with a non-standard name.
265 * Keep this in sync with the "sh" description below, but avoid
266 * non-portable features that might not be supplied by all
267 * sh-compatible shells.
271 FALSE, "", "", "", 0,
272 FALSE, "echo \"%s\"\n", "%s\n", "{ %s \n} || exit $?\n", "'\n'", '#',
276 #endif /* DEFSHELL_CUSTOM */
278 * SH description. Echo control is also possible and, under
279 * sun UNIX anyway, one can even control error checking.
283 FALSE, "", "", "", 0,
284 FALSE, "echo \"%s\"\n", "%s\n", "{ %s \n} || exit $?\n", "'\n'", '#',
285 #if defined(MAKE_NATIVE) && defined(__NetBSD__)
297 TRUE, "set +v", "set -v", "set +v", 6,
298 FALSE, "echo \"%s\"\n", "%s\n", "{ %s \n} || exit $?\n", "'\n'", '#',
303 * CSH description. The csh can do echo control by playing
304 * with the setting of the 'echo' shell variable. Sadly,
305 * however, it is unable to do error control nicely.
309 TRUE, "unset verbose", "set verbose", "unset verbose", 10,
310 FALSE, "echo \"%s\"\n", "csh -c \"%s || exit 0\"\n", "", "'\\\n'", '#',
318 FALSE, NULL, NULL, NULL, 0,
319 FALSE, NULL, NULL, NULL, NULL, 0,
323 static Shell *commandShell = &shells[DEFSHELL_INDEX]; /* this is the shell to
325 * commands in the Makefile.
327 * Job_ParseShell function */
328 const char *shellPath = NULL, /* full pathname of
329 * executable image */
330 *shellName = NULL; /* last component of shell */
331 char *shellErrFlag = NULL;
332 static const char *shellArgv = NULL; /* Custom shell args */
335 STATIC Job *job_table; /* The structures that describe them */
336 STATIC Job *job_table_end; /* job_table + maxJobs */
337 static int wantToken; /* we want a token */
338 static int lurking_children = 0;
339 static int make_suspended = 0; /* non-zero if we've seen a SIGTSTP (etc) */
342 * Set of descriptors of pipes connected to
343 * the output channels of children
345 static struct pollfd *fds = NULL;
346 static Job **jobfds = NULL;
348 static void watchfd(Job *);
349 static void clearfd(Job *);
350 static int readyfd(Job *);
352 STATIC GNode *lastNode; /* The node for which output was most recently
354 static char *targPrefix = NULL; /* What we print at the start of TARG_FMT */
355 static Job tokenWaitJob; /* token wait pseudo-job */
357 static Job childExitJob; /* child exit pseudo-job */
358 #define CHILD_EXIT "."
359 #define DO_JOB_RESUME "R"
361 #define TARG_FMT "%s %s ---\n" /* Default format */
362 #define MESSAGE(fp, gn) \
363 if (maxJobs != 1 && targPrefix && *targPrefix) \
364 (void)fprintf(fp, TARG_FMT, targPrefix, gn->name)
366 static sigset_t caught_signals; /* Set of signals we handle */
368 #define KILLPG(pid, sig) kill(-(pid), (sig))
370 #define KILLPG(pid, sig) killpg((pid), (sig))
373 static void JobChildSig(int);
374 static void JobContinueSig(int);
375 static Job *JobFindPid(int, int, Boolean);
376 static int JobPrintCommand(void *, void *);
377 static int JobSaveCommand(void *, void *);
378 static void JobClose(Job *);
379 static void JobExec(Job *, char **);
380 static void JobMakeArgv(Job *, char **);
381 static int JobStart(GNode *, int);
382 static char *JobOutput(Job *, char *, char *, int);
383 static void JobDoOutput(Job *, Boolean);
384 static Shell *JobMatchShell(const char *);
385 static void JobInterrupt(int, int) MAKE_ATTR_DEAD;
386 static void JobRestartJobs(void);
387 static void JobTokenAdd(void);
388 static void JobSigLock(sigset_t *);
389 static void JobSigUnlock(sigset_t *);
390 static void JobSigReset(void);
392 #if !defined(MALLOC_OPTIONS)
393 # define MALLOC_OPTIONS "A"
395 const char *malloc_options= MALLOC_OPTIONS;
398 job_table_dump(const char *where)
402 fprintf(debug_file, "job table @ %s\n", where);
403 for (job = job_table; job < job_table_end; job++) {
404 fprintf(debug_file, "job %d, status %d, flags %d, pid %d\n",
405 (int)(job - job_table), job->job_state, job->flags, job->pid);
410 * Delete the target of a failed, interrupted, or otherwise
411 * unsuccessful job unless inhibited by .PRECIOUS.
414 JobDeleteTarget(GNode *gn)
416 if ((gn->type & (OP_JOIN|OP_PHONY)) == 0 && !Targ_Precious(gn)) {
417 char *file = (gn->path == NULL ? gn->name : gn->path);
418 if (!noExecute && eunlink(file) != -1) {
419 Error("*** %s removed", file);
425 * JobSigLock/JobSigUnlock
427 * Signal lock routines to get exclusive access. Currently used to
428 * protect `jobs' and `stoppedJobs' list manipulations.
430 static void JobSigLock(sigset_t *omaskp)
432 if (sigprocmask(SIG_BLOCK, &caught_signals, omaskp) != 0) {
433 Punt("JobSigLock: sigprocmask: %s", strerror(errno));
438 static void JobSigUnlock(sigset_t *omaskp)
440 (void)sigprocmask(SIG_SETMASK, omaskp, NULL);
444 JobCreatePipe(Job *job, int minfd)
448 if (pipe(job->jobPipe) == -1)
449 Punt("Cannot create pipe: %s", strerror(errno));
451 for (i = 0; i < 2; i++) {
452 /* Avoid using low numbered fds */
453 fd = fcntl(job->jobPipe[i], F_DUPFD, minfd);
455 close(job->jobPipe[i]);
456 job->jobPipe[i] = fd;
460 /* Set close-on-exec flag for both */
461 if (fcntl(job->jobPipe[0], F_SETFD, FD_CLOEXEC) == -1)
462 Punt("Cannot set close-on-exec: %s", strerror(errno));
463 if (fcntl(job->jobPipe[1], F_SETFD, FD_CLOEXEC) == -1)
464 Punt("Cannot set close-on-exec: %s", strerror(errno));
467 * We mark the input side of the pipe non-blocking; we poll(2) the
468 * pipe when we're waiting for a job token, but we might lose the
469 * race for the token when a new one becomes available, so the read
470 * from the pipe should not block.
472 flags = fcntl(job->jobPipe[0], F_GETFL, 0);
474 Punt("Cannot get flags: %s", strerror(errno));
476 if (fcntl(job->jobPipe[0], F_SETFL, flags) == -1)
477 Punt("Cannot set flags: %s", strerror(errno));
481 *-----------------------------------------------------------------------
483 * Pass a signal to a job
486 * signop Signal to send it
489 * None, except the job may bite it.
491 *-----------------------------------------------------------------------
494 JobCondPassSig(int signo)
499 (void)fprintf(debug_file, "JobCondPassSig(%d) called.\n", signo);
502 for (job = job_table; job < job_table_end; job++) {
503 if (job->job_state != JOB_ST_RUNNING)
506 (void)fprintf(debug_file,
507 "JobCondPassSig passing signal %d to child %d.\n",
510 KILLPG(job->pid, signo);
515 *-----------------------------------------------------------------------
520 * signo The signal number we've received
526 * Sends a token on the child exit pipe to wake us up from
529 *-----------------------------------------------------------------------
532 JobChildSig(int signo MAKE_ATTR_UNUSED)
534 while (write(childExitJob.outPipe, CHILD_EXIT, 1) == -1 && errno == EAGAIN)
540 *-----------------------------------------------------------------------
542 * Resume all stopped jobs.
545 * signo The signal number we've received
551 * Jobs start running again.
553 *-----------------------------------------------------------------------
556 JobContinueSig(int signo MAKE_ATTR_UNUSED)
559 * Defer sending to SIGCONT to our stopped children until we return
560 * from the signal handler.
562 while (write(childExitJob.outPipe, DO_JOB_RESUME, 1) == -1 &&
568 *-----------------------------------------------------------------------
570 * Pass a signal on to all jobs, then resend to ourselves.
573 * signo The signal number we've received
579 * We die by the same signal.
581 *-----------------------------------------------------------------------
583 MAKE_ATTR_DEAD static void
584 JobPassSig_int(int signo)
586 /* Run .INTERRUPT target then exit */
587 JobInterrupt(TRUE, signo);
590 MAKE_ATTR_DEAD static void
591 JobPassSig_term(int signo)
593 /* Dont run .INTERRUPT target then exit */
594 JobInterrupt(FALSE, signo);
598 JobPassSig_suspend(int signo)
600 sigset_t nmask, omask;
601 struct sigaction act;
603 /* Suppress job started/continued messages */
606 /* Pass the signal onto every job */
607 JobCondPassSig(signo);
610 * Send ourselves the signal now we've given the message to everyone else.
611 * Note we block everything else possible while we're getting the signal.
612 * This ensures that all our jobs get continued when we wake up before
613 * we take any other signal.
616 sigdelset(&nmask, signo);
617 (void)sigprocmask(SIG_SETMASK, &nmask, &omask);
619 act.sa_handler = SIG_DFL;
620 sigemptyset(&act.sa_mask);
622 (void)sigaction(signo, &act, NULL);
625 (void)fprintf(debug_file,
626 "JobPassSig passing signal %d to self.\n", signo);
629 (void)kill(getpid(), signo);
632 * We've been continued.
634 * A whole host of signals continue to happen!
635 * SIGCHLD for any processes that actually suspended themselves.
636 * SIGCHLD for any processes that exited while we were alseep.
637 * The SIGCONT that actually caused us to wakeup.
639 * Since we defer passing the SIGCONT on to our children until
640 * the main processing loop, we can be sure that all the SIGCHLD
641 * events will have happened by then - and that the waitpid() will
642 * collect the child 'suspended' events.
643 * For correct sequencing we just need to ensure we process the
644 * waitpid() before passign on the SIGCONT.
646 * In any case nothing else is needed here.
649 /* Restore handler and signal mask */
650 act.sa_handler = JobPassSig_suspend;
651 (void)sigaction(signo, &act, NULL);
652 (void)sigprocmask(SIG_SETMASK, &omask, NULL);
656 *-----------------------------------------------------------------------
658 * Compare the pid of the job with the given pid and return 0 if they
659 * are equal. This function is called from Job_CatchChildren
660 * to find the job descriptor of the finished job.
664 * pid process id desired
667 * Job with matching pid
671 *-----------------------------------------------------------------------
674 JobFindPid(int pid, int status, Boolean isJobs)
678 for (job = job_table; job < job_table_end; job++) {
679 if ((job->job_state == status) && job->pid == pid)
682 if (DEBUG(JOB) && isJobs)
683 job_table_dump("no pid");
688 *-----------------------------------------------------------------------
690 * Put out another command for the given job. If the command starts
691 * with an @ or a - we process it specially. In the former case,
692 * so long as the -s and -n flags weren't given to make, we stick
693 * a shell-specific echoOff command in the script. In the latter,
694 * we ignore errors for the entire job, unless the shell has error
696 * If the command is just "..." we take all future commands for this
697 * job to be commands to be executed once the entire graph has been
698 * made and return non-zero to signal that the end of the commands
699 * was reached. These commands are later attached to the postCommands
700 * node and executed by Job_End when all things are done.
701 * This function is called from JobStart via Lst_ForEach.
704 * cmdp command string to print
705 * jobp job for which to print it
708 * Always 0, unless the command was "..."
711 * If the command begins with a '-' and the shell has no error control,
712 * the JOB_IGNERR flag is set in the job descriptor.
713 * If the command is "..." and we're not ignoring such things,
714 * tailCmds is set to the successor node of the cmd.
715 * numCommands is incremented if the command is actually printed.
716 *-----------------------------------------------------------------------
719 JobPrintCommand(void *cmdp, void *jobp)
721 Boolean noSpecials; /* true if we shouldn't worry about
722 * inserting special commands into
723 * the input stream. */
724 Boolean shutUp = FALSE; /* true if we put a no echo command
725 * into the command file */
726 Boolean errOff = FALSE; /* true if we turned error checking
727 * off before printing the command
728 * and need to turn it back on */
729 const char *cmdTemplate; /* Template to use when printing the
731 char *cmdStart; /* Start of expanded command */
732 char *escCmd = NULL; /* Command with quotes/backticks escaped */
733 char *cmd = (char *)cmdp;
734 Job *job = (Job *)jobp;
737 noSpecials = NoExecute(job->node);
739 if (strcmp(cmd, "...") == 0) {
740 job->node->type |= OP_SAVE_CMDS;
741 if ((job->flags & JOB_IGNDOTS) == 0) {
742 job->tailCmds = Lst_Succ(Lst_Member(job->node->commands,
749 #define DBPRINTF(fmt, arg) if (DEBUG(JOB)) { \
750 (void)fprintf(debug_file, fmt, arg); \
752 (void)fprintf(job->cmdFILE, fmt, arg); \
753 (void)fflush(job->cmdFILE);
757 cmdStart = cmd = Var_Subst(NULL, cmd, job->node, VARF_WANTRES);
759 cmdTemplate = "%s\n";
762 * Check for leading @' and -'s to control echoing and error checking.
764 while (*cmd == '@' || *cmd == '-' || (*cmd == '+')) {
767 shutUp = DEBUG(LOUD) ? FALSE : TRUE;
775 * We're not actually executing anything...
776 * but this one needs to be - use compat mode just for it.
778 CompatRunCommand(cmdp, job->node);
787 while (isspace((unsigned char) *cmd))
791 * If the shell doesn't have error control the alternate echo'ing will
792 * be done (to avoid showing additional error checking code)
793 * and this will need the characters '$ ` \ "' escaped
796 if (!commandShell->hasErrCtl) {
797 /* Worst that could happen is every char needs escaping. */
798 escCmd = bmake_malloc((strlen(cmd) * 2) + 1);
799 for (i = 0, j= 0; cmd[i] != '\0'; i++, j++) {
800 if (cmd[i] == '$' || cmd[i] == '`' || cmd[i] == '\\' ||
809 if (!(job->flags & JOB_SILENT) && !noSpecials &&
810 commandShell->hasEchoCtl) {
811 DBPRINTF("%s\n", commandShell->echoOff);
813 if (commandShell->hasErrCtl)
820 if (commandShell->hasErrCtl) {
822 * we don't want the error-control commands showing
823 * up either, so we turn off echoing while executing
824 * them. We could put another field in the shell
825 * structure to tell JobDoOutput to look for this
826 * string too, but why make it any more complex than
829 if (!(job->flags & JOB_SILENT) && !shutUp &&
830 commandShell->hasEchoCtl) {
831 DBPRINTF("%s\n", commandShell->echoOff);
832 DBPRINTF("%s\n", commandShell->ignErr);
833 DBPRINTF("%s\n", commandShell->echoOn);
835 DBPRINTF("%s\n", commandShell->ignErr);
837 } else if (commandShell->ignErr &&
838 (*commandShell->ignErr != '\0'))
841 * The shell has no error control, so we need to be
842 * weird to get it to ignore any errors from the command.
843 * If echoing is turned on, we turn it off and use the
844 * errCheck template to echo the command. Leave echoing
845 * off so the user doesn't see the weirdness we go through
846 * to ignore errors. Set cmdTemplate to use the weirdness
847 * instead of the simple "%s\n" template.
849 job->flags |= JOB_IGNERR;
850 if (!(job->flags & JOB_SILENT) && !shutUp) {
851 if (commandShell->hasEchoCtl) {
852 DBPRINTF("%s\n", commandShell->echoOff);
854 DBPRINTF(commandShell->errCheck, escCmd);
858 DBPRINTF(commandShell->errCheck, escCmd);
861 cmdTemplate = commandShell->ignErr;
863 * The error ignoration (hee hee) is already taken care
864 * of by the ignErr template, so pretend error checking
877 * If errors are being checked and the shell doesn't have error control
878 * but does supply an errOut template, then setup commands to run
882 if (!commandShell->hasErrCtl && commandShell->errOut &&
883 (*commandShell->errOut != '\0')) {
884 if (!(job->flags & JOB_SILENT) && !shutUp) {
885 if (commandShell->hasEchoCtl) {
886 DBPRINTF("%s\n", commandShell->echoOff);
888 DBPRINTF(commandShell->errCheck, escCmd);
891 /* If it's a comment line or blank, treat as an ignored error */
892 if ((escCmd[0] == commandShell->commentChar) ||
894 cmdTemplate = commandShell->ignErr;
896 cmdTemplate = commandShell->errOut;
901 if (DEBUG(SHELL) && strcmp(shellName, "sh") == 0 &&
902 (job->flags & JOB_TRACED) == 0) {
903 DBPRINTF("set -%s\n", "x");
904 job->flags |= JOB_TRACED;
907 DBPRINTF(cmdTemplate, cmd);
912 * If echoing is already off, there's no point in issuing the
913 * echoOff command. Otherwise we issue it and pretend it was on
914 * for the whole command...
916 if (!shutUp && !(job->flags & JOB_SILENT) && commandShell->hasEchoCtl){
917 DBPRINTF("%s\n", commandShell->echoOff);
920 DBPRINTF("%s\n", commandShell->errCheck);
922 if (shutUp && commandShell->hasEchoCtl) {
923 DBPRINTF("%s\n", commandShell->echoOn);
929 *-----------------------------------------------------------------------
931 * Save a command to be executed when everything else is done.
932 * Callback function for JobFinish...
938 * The command is tacked onto the end of postCommands's commands list.
940 *-----------------------------------------------------------------------
943 JobSaveCommand(void *cmd, void *gn)
945 cmd = Var_Subst(NULL, (char *)cmd, (GNode *)gn, VARF_WANTRES);
946 (void)Lst_AtEnd(postCommands->commands, cmd);
952 *-----------------------------------------------------------------------
954 * Called to close both input and output pipes when a job is finished.
960 * The file descriptors associated with the job are closed.
962 *-----------------------------------------------------------------------
968 (void)close(job->outPipe);
971 JobDoOutput(job, TRUE);
972 (void)close(job->inPipe);
977 *-----------------------------------------------------------------------
979 * Do final processing for the given job including updating
980 * parents and starting new jobs as available/necessary. Note
981 * that we pay no attention to the JOB_IGNERR flag here.
982 * This is because when we're called because of a noexecute flag
983 * or something, jstat.w_status is 0 and when called from
984 * Job_CatchChildren, the status is zeroed if it s/b ignored.
988 * status sub-why job went away
994 * Final commands for the job are placed on postCommands.
996 * If we got an error and are aborting (aborting == ABORT_ERROR) and
997 * the job list is now empty, we are done for the day.
998 * If we recognized an error (errors !=0), we set the aborting flag
999 * to ABORT_ERROR so no more jobs will be started.
1000 *-----------------------------------------------------------------------
1004 JobFinish (Job *job, WAIT_T status)
1006 Boolean done, return_job_token;
1009 fprintf(debug_file, "Jobfinish: %d [%s], status %d\n",
1010 job->pid, job->node->name, status);
1013 if ((WIFEXITED(status) &&
1014 (((WEXITSTATUS(status) != 0) && !(job->flags & JOB_IGNERR)))) ||
1015 WIFSIGNALED(status))
1018 * If it exited non-zero and either we're doing things our
1019 * way or we're not ignoring errors, the job is finished.
1020 * Similarly, if the shell died because of a signal
1021 * the job is also finished. In these
1022 * cases, finish out the job's output before printing the exit
1026 if (job->cmdFILE != NULL && job->cmdFILE != stdout) {
1027 (void)fclose(job->cmdFILE);
1028 job->cmdFILE = NULL;
1031 } else if (WIFEXITED(status)) {
1033 * Deal with ignored errors in -B mode. We need to print a message
1034 * telling of the ignored error as well as setting status.w_status
1035 * to 0 so the next command gets run. To do this, we set done to be
1036 * TRUE if in -B mode and the job exited non-zero.
1038 done = WEXITSTATUS(status) != 0;
1040 * Old comment said: "Note we don't
1041 * want to close down any of the streams until we know we're at the
1043 * But we do. Otherwise when are we going to print the rest of the
1049 * No need to close things down or anything.
1055 if (WIFEXITED(status)) {
1057 (void)fprintf(debug_file, "Process %d [%s] exited.\n",
1058 job->pid, job->node->name);
1060 if (WEXITSTATUS(status) != 0) {
1061 if (job->node != lastNode) {
1062 MESSAGE(stdout, job->node);
1063 lastNode = job->node;
1067 meta_job_error(job, job->node, job->flags, WEXITSTATUS(status));
1070 (void)printf("*** [%s] Error code %d%s\n",
1072 WEXITSTATUS(status),
1073 (job->flags & JOB_IGNERR) ? " (ignored)" : "");
1074 if (job->flags & JOB_IGNERR) {
1075 WAIT_STATUS(status) = 0;
1077 if (deleteOnError) {
1078 JobDeleteTarget(job->node);
1080 PrintOnError(job->node, NULL);
1082 } else if (DEBUG(JOB)) {
1083 if (job->node != lastNode) {
1084 MESSAGE(stdout, job->node);
1085 lastNode = job->node;
1087 (void)printf("*** [%s] Completed successfully\n",
1091 if (job->node != lastNode) {
1092 MESSAGE(stdout, job->node);
1093 lastNode = job->node;
1095 (void)printf("*** [%s] Signal %d\n",
1096 job->node->name, WTERMSIG(status));
1097 if (deleteOnError) {
1098 JobDeleteTarget(job->node);
1101 (void)fflush(stdout);
1108 if ((x = meta_job_finish(job)) != 0 && status == 0) {
1114 return_job_token = FALSE;
1116 Trace_Log(JOBEND, job);
1117 if (!(job->flags & JOB_SPECIAL)) {
1118 if ((WAIT_STATUS(status) != 0) ||
1119 (aborting == ABORT_ERROR) ||
1120 (aborting == ABORT_INTERRUPT))
1121 return_job_token = TRUE;
1124 if ((aborting != ABORT_ERROR) && (aborting != ABORT_INTERRUPT) &&
1125 (WAIT_STATUS(status) == 0)) {
1127 * As long as we aren't aborting and the job didn't return a non-zero
1128 * status that we shouldn't ignore, we call Make_Update to update
1129 * the parents. In addition, any saved commands for the node are placed
1130 * on the .END target.
1132 if (job->tailCmds != NULL) {
1133 Lst_ForEachFrom(job->node->commands, job->tailCmds,
1137 job->node->made = MADE;
1138 if (!(job->flags & JOB_SPECIAL))
1139 return_job_token = TRUE;
1140 Make_Update(job->node);
1141 job->job_state = JOB_ST_FREE;
1142 } else if (WAIT_STATUS(status)) {
1144 job->job_state = JOB_ST_FREE;
1148 * Set aborting if any error.
1150 if (errors && !keepgoing && (aborting != ABORT_INTERRUPT)) {
1152 * If we found any errors in this batch of children and the -k flag
1153 * wasn't given, we set the aborting flag so no more jobs get
1156 aborting = ABORT_ERROR;
1159 if (return_job_token)
1162 if (aborting == ABORT_ERROR && jobTokensRunning == 0) {
1164 * If we are aborting and the job table is now empty, we finish.
1171 *-----------------------------------------------------------------------
1173 * Touch the given target. Called by JobStart when the -t flag was
1177 * gn the node of the file to touch
1178 * silent TRUE if should not print message
1184 * The data modification of the file is changed. In addition, if the
1185 * file did not exist, it is created.
1186 *-----------------------------------------------------------------------
1189 Job_Touch(GNode *gn, Boolean silent)
1191 int streamID; /* ID of stream opened to do the touch */
1192 struct utimbuf times; /* Times for utime() call */
1194 if (gn->type & (OP_JOIN|OP_USE|OP_USEBEFORE|OP_EXEC|OP_OPTIONAL|
1195 OP_SPECIAL|OP_PHONY)) {
1197 * .JOIN, .USE, .ZEROTIME and .OPTIONAL targets are "virtual" targets
1198 * and, as such, shouldn't really be created.
1203 if (!silent || NoExecute(gn)) {
1204 (void)fprintf(stdout, "touch %s\n", gn->name);
1205 (void)fflush(stdout);
1208 if (NoExecute(gn)) {
1212 if (gn->type & OP_ARCHV) {
1214 } else if (gn->type & OP_LIB) {
1217 char *file = gn->path ? gn->path : gn->name;
1219 times.actime = times.modtime = now;
1220 if (utime(file, ×) < 0){
1221 streamID = open(file, O_RDWR | O_CREAT, 0666);
1223 if (streamID >= 0) {
1227 * Read and write a byte to the file to change the
1228 * modification time, then close the file.
1230 if (read(streamID, &c, 1) == 1) {
1231 (void)lseek(streamID, (off_t)0, SEEK_SET);
1232 while (write(streamID, &c, 1) == -1 && errno == EAGAIN)
1236 (void)close(streamID);
1238 (void)fprintf(stdout, "*** couldn't touch %s: %s",
1239 file, strerror(errno));
1240 (void)fflush(stdout);
1247 *-----------------------------------------------------------------------
1248 * Job_CheckCommands --
1249 * Make sure the given node has all the commands it needs.
1252 * gn The target whose commands need verifying
1253 * abortProc Function to abort with message
1256 * TRUE if the commands list is/was ok.
1259 * The node will have commands from the .DEFAULT rule added to it
1261 *-----------------------------------------------------------------------
1264 Job_CheckCommands(GNode *gn, void (*abortProc)(const char *, ...))
1266 if (OP_NOP(gn->type) && Lst_IsEmpty(gn->commands) &&
1267 ((gn->type & OP_LIB) == 0 || Lst_IsEmpty(gn->children))) {
1269 * No commands. Look for .DEFAULT rule from which we might infer
1272 if ((DEFAULT != NULL) && !Lst_IsEmpty(DEFAULT->commands) &&
1273 (gn->type & OP_SPECIAL) == 0) {
1276 * Make only looks for a .DEFAULT if the node was never the
1277 * target of an operator, so that's what we do too. If
1278 * a .DEFAULT was given, we substitute its commands for gn's
1279 * commands and set the IMPSRC variable to be the target's name
1280 * The DEFAULT node acts like a transformation rule, in that
1281 * gn also inherits any attributes or sources attached to
1284 Make_HandleUse(DEFAULT, gn);
1285 Var_Set(IMPSRC, Var_Value(TARGET, gn, &p1), gn, 0);
1287 } else if (Dir_MTime(gn, 0) == 0 && (gn->type & OP_SPECIAL) == 0) {
1289 * The node wasn't the target of an operator we have no .DEFAULT
1290 * rule to go on and the target doesn't already exist. There's
1291 * nothing more we can do for this branch. If the -k flag wasn't
1292 * given, we stop in our tracks, otherwise we just don't update
1293 * this node's parents so they never get examined.
1295 static const char msg[] = ": don't know how to make";
1297 if (gn->flags & FROM_DEPEND) {
1298 if (!Job_RunTarget(".STALE", gn->fname))
1299 fprintf(stdout, "%s: %s, %d: ignoring stale %s for %s\n",
1300 progname, gn->fname, gn->lineno, makeDependfile,
1305 if (gn->type & OP_OPTIONAL) {
1306 (void)fprintf(stdout, "%s%s %s (ignored)\n", progname,
1308 (void)fflush(stdout);
1309 } else if (keepgoing) {
1310 (void)fprintf(stdout, "%s%s %s (continuing)\n", progname,
1312 (void)fflush(stdout);
1315 (*abortProc)("%s%s %s. Stop", progname, msg, gn->name);
1324 *-----------------------------------------------------------------------
1326 * Execute the shell for the given job. Called from JobStart
1329 * job Job to execute
1335 * A shell is executed, outputs is altered and the Job structure added
1338 *-----------------------------------------------------------------------
1341 JobExec(Job *job, char **argv)
1343 int cpid; /* ID of new child */
1346 job->flags &= ~JOB_TRACED;
1351 (void)fprintf(debug_file, "Running %s %sly\n", job->node->name, "local");
1352 (void)fprintf(debug_file, "\tCommand: ");
1353 for (i = 0; argv[i] != NULL; i++) {
1354 (void)fprintf(debug_file, "%s ", argv[i]);
1356 (void)fprintf(debug_file, "\n");
1360 * Some jobs produce no output and it's disconcerting to have
1361 * no feedback of their running (since they produce no output, the
1362 * banner with their name in it never appears). This is an attempt to
1363 * provide that feedback, even if nothing follows it.
1365 if ((lastNode != job->node) && !(job->flags & JOB_SILENT)) {
1366 MESSAGE(stdout, job->node);
1367 lastNode = job->node;
1370 /* No interruptions until this job is on the `jobs' list */
1373 /* Pre-emptively mark job running, pid still zero though */
1374 job->job_state = JOB_ST_RUNNING;
1378 Punt("Cannot vfork: %s", strerror(errno));
1386 meta_job_child(job);
1390 * Reset all signal handlers; this is necessary because we also
1391 * need to unblock signals before we exec(2).
1395 /* Now unblock signals */
1396 sigemptyset(&tmask);
1397 JobSigUnlock(&tmask);
1400 * Must duplicate the input stream down to the child's input and
1401 * reset it to the beginning (again). Since the stream was marked
1402 * close-on-exec, we must clear that bit in the new input.
1404 if (dup2(FILENO(job->cmdFILE), 0) == -1) {
1405 execError("dup2", "job->cmdFILE");
1408 if (fcntl(0, F_SETFD, 0) == -1) {
1409 execError("fcntl clear close-on-exec", "stdin");
1412 if (lseek(0, (off_t)0, SEEK_SET) == -1) {
1413 execError("lseek to 0", "stdin");
1417 if (Always_pass_job_queue ||
1418 (job->node->type & (OP_MAKE | OP_SUBMAKE))) {
1420 * Pass job token pipe to submakes.
1422 if (fcntl(tokenWaitJob.inPipe, F_SETFD, 0) == -1) {
1423 execError("clear close-on-exec", "tokenWaitJob.inPipe");
1426 if (fcntl(tokenWaitJob.outPipe, F_SETFD, 0) == -1) {
1427 execError("clear close-on-exec", "tokenWaitJob.outPipe");
1433 * Set up the child's output to be routed through the pipe
1434 * we've created for it.
1436 if (dup2(job->outPipe, 1) == -1) {
1437 execError("dup2", "job->outPipe");
1441 * The output channels are marked close on exec. This bit was
1442 * duplicated by the dup2(on some systems), so we have to clear
1443 * it before routing the shell's error output to the same place as
1444 * its standard output.
1446 if (fcntl(1, F_SETFD, 0) == -1) {
1447 execError("clear close-on-exec", "stdout");
1450 if (dup2(1, 2) == -1) {
1451 execError("dup2", "1, 2");
1456 * We want to switch the child into a different process family so
1457 * we can kill it and all its descendants in one fell swoop,
1458 * by killing its process family, but not commit suicide.
1460 #if defined(HAVE_SETPGID)
1461 (void)setpgid(0, getpid());
1463 #if defined(HAVE_SETSID)
1464 /* XXX: dsl - I'm sure this should be setpgrp()... */
1467 (void)setpgrp(0, getpid());
1473 (void)execv(shellPath, argv);
1474 execError("exec", shellPath);
1478 /* Parent, continuing after the child exec */
1481 Trace_Log(JOBSTART, job);
1484 * Set the current position in the buffer to the beginning
1485 * and mark another stream to watch in the outputs mask
1491 if (job->cmdFILE != NULL && job->cmdFILE != stdout) {
1492 (void)fclose(job->cmdFILE);
1493 job->cmdFILE = NULL;
1497 * Now the job is actually running, add it to the table.
1500 fprintf(debug_file, "JobExec(%s): pid %d added to jobs table\n",
1501 job->node->name, job->pid);
1502 job_table_dump("job started");
1504 JobSigUnlock(&mask);
1508 *-----------------------------------------------------------------------
1510 * Create the argv needed to execute the shell for a given job.
1517 *-----------------------------------------------------------------------
1520 JobMakeArgv(Job *job, char **argv)
1523 static char args[10]; /* For merged arguments */
1525 argv[0] = UNCONST(shellName);
1528 if ((commandShell->exit && (*commandShell->exit != '-')) ||
1529 (commandShell->echo && (*commandShell->echo != '-')))
1532 * At least one of the flags doesn't have a minus before it, so
1533 * merge them together. Have to do this because the *(&(@*#*&#$#
1534 * Bourne shell thinks its second argument is a file to source.
1535 * Grrrr. Note the ten-character limitation on the combined arguments.
1537 (void)snprintf(args, sizeof(args), "-%s%s",
1538 ((job->flags & JOB_IGNERR) ? "" :
1539 (commandShell->exit ? commandShell->exit : "")),
1540 ((job->flags & JOB_SILENT) ? "" :
1541 (commandShell->echo ? commandShell->echo : "")));
1548 if (!(job->flags & JOB_IGNERR) && commandShell->exit) {
1549 argv[argc] = UNCONST(commandShell->exit);
1552 if (!(job->flags & JOB_SILENT) && commandShell->echo) {
1553 argv[argc] = UNCONST(commandShell->echo);
1561 *-----------------------------------------------------------------------
1563 * Start a target-creation process going for the target described
1564 * by the graph node gn.
1567 * gn target to create
1568 * flags flags for the job to override normal ones.
1569 * e.g. JOB_SPECIAL or JOB_IGNDOTS
1570 * previous The previous Job structure for this node, if any.
1573 * JOB_ERROR if there was an error in the commands, JOB_FINISHED
1574 * if there isn't actually anything left to do for the job and
1575 * JOB_RUNNING if the job has been started.
1578 * A new Job node is created and added to the list of running
1579 * jobs. PMake is forked and a child shell created.
1581 * NB: I'm fairly sure that this code is never called with JOB_SPECIAL set
1582 * JOB_IGNDOTS is never set (dsl)
1583 * Also the return value is ignored by everyone.
1584 *-----------------------------------------------------------------------
1587 JobStart(GNode *gn, int flags)
1589 Job *job; /* new job descriptor */
1590 char *argv[10]; /* Argument vector to shell */
1591 Boolean cmdsOK; /* true if the nodes commands were all right */
1592 Boolean noExec; /* Set true if we decide not to run the job */
1593 int tfd; /* File descriptor to the temp file */
1595 for (job = job_table; job < job_table_end; job++) {
1596 if (job->job_state == JOB_ST_FREE)
1599 if (job >= job_table_end)
1600 Punt("JobStart no job slots vacant");
1602 memset(job, 0, sizeof *job);
1603 job->job_state = JOB_ST_SETUP;
1604 if (gn->type & OP_SPECIAL)
1605 flags |= JOB_SPECIAL;
1608 job->tailCmds = NULL;
1611 * Set the initial value of the flags for this job based on the global
1612 * ones and the node's attributes... Any flags supplied by the caller
1613 * are also added to the field.
1616 if (Targ_Ignore(gn)) {
1617 job->flags |= JOB_IGNERR;
1619 if (Targ_Silent(gn)) {
1620 job->flags |= JOB_SILENT;
1622 job->flags |= flags;
1625 * Check the commands now so any attributes from .DEFAULT have a chance
1626 * to migrate to the node
1628 cmdsOK = Job_CheckCommands(gn, Error);
1630 job->inPollfd = NULL;
1632 * If the -n flag wasn't given, we open up OUR (not the child's)
1633 * temporary file to stuff commands in it. The thing is rd/wr so we don't
1634 * need to reopen it to feed it to the shell. If the -n flag *was* given,
1635 * we just set the file to be stdout. Cute, huh?
1637 if (((gn->type & OP_MAKE) && !(noRecursiveExecute)) ||
1638 (!noExecute && !touchFlag)) {
1640 * tfile is the name of a file into which all shell commands are
1641 * put. It is removed before the child shell is executed, unless
1642 * DEBUG(SCRIPT) is set.
1647 * We're serious here, but if the commands were bogus, we're
1651 PrintOnError(gn, NULL); /* provide some clue */
1656 tfd = mkTempFile(TMPPAT, &tfile);
1658 (void)eunlink(tfile);
1659 JobSigUnlock(&mask);
1661 job->cmdFILE = fdopen(tfd, "w+");
1662 if (job->cmdFILE == NULL) {
1663 Punt("Could not fdopen %s", tfile);
1665 (void)fcntl(FILENO(job->cmdFILE), F_SETFD, FD_CLOEXEC);
1667 * Send the commands to the command file, flush all its buffers then
1668 * rewind and remove the thing.
1674 meta_job_start(job, gn);
1675 if (Targ_Silent(gn)) { /* might have changed */
1676 job->flags |= JOB_SILENT;
1681 * We can do all the commands at once. hooray for sanity
1684 Lst_ForEach(gn->commands, JobPrintCommand, job);
1687 * If we didn't print out any commands to the shell script,
1688 * there's not much point in executing the shell, is there?
1690 if (numCommands == 0) {
1695 } else if (NoExecute(gn)) {
1697 * Not executing anything -- just print all the commands to stdout
1698 * in one fell swoop. This will still set up job->tailCmds correctly.
1700 if (lastNode != gn) {
1701 MESSAGE(stdout, gn);
1704 job->cmdFILE = stdout;
1706 * Only print the commands if they're ok, but don't die if they're
1707 * not -- just let the user know they're bad and keep going. It
1708 * doesn't do any harm in this case and may do some good.
1711 Lst_ForEach(gn->commands, JobPrintCommand, job);
1714 * Don't execute the shell, thank you.
1719 * Just touch the target and note that no shell should be executed.
1720 * Set cmdFILE to stdout to make life easier. Check the commands, too,
1721 * but don't die if they're no good -- it does no harm to keep working
1724 job->cmdFILE = stdout;
1725 Job_Touch(gn, job->flags&JOB_SILENT);
1728 /* Just in case it isn't already... */
1729 (void)fflush(job->cmdFILE);
1732 * If we're not supposed to execute a shell, don't.
1735 if (!(job->flags & JOB_SPECIAL))
1738 * Unlink and close the command file if we opened one
1740 if (job->cmdFILE != stdout) {
1741 if (job->cmdFILE != NULL) {
1742 (void)fclose(job->cmdFILE);
1743 job->cmdFILE = NULL;
1748 * We only want to work our way up the graph if we aren't here because
1749 * the commands for the job were no good.
1751 if (cmdsOK && aborting == 0) {
1752 if (job->tailCmds != NULL) {
1753 Lst_ForEachFrom(job->node->commands, job->tailCmds,
1757 job->node->made = MADE;
1758 Make_Update(job->node);
1760 job->job_state = JOB_ST_FREE;
1761 return cmdsOK ? JOB_FINISHED : JOB_ERROR;
1765 * Set up the control arguments to the shell. This is based on the flags
1766 * set earlier for this job.
1768 JobMakeArgv(job, argv);
1770 /* Create the pipe by which we'll get the shell's output. */
1771 JobCreatePipe(job, 3);
1774 return(JOB_RUNNING);
1778 JobOutput(Job *job, char *cp, char *endp, int msg)
1782 if (commandShell->noPrint) {
1783 ecp = Str_FindSubstring(cp, commandShell->noPrint);
1784 while (ecp != NULL) {
1787 if (!beSilent && msg && job->node != lastNode) {
1788 MESSAGE(stdout, job->node);
1789 lastNode = job->node;
1792 * The only way there wouldn't be a newline after
1793 * this line is if it were the last in the buffer.
1794 * however, since the non-printable comes after it,
1795 * there must be a newline, so we don't print one.
1797 (void)fprintf(stdout, "%s", cp);
1798 (void)fflush(stdout);
1800 cp = ecp + commandShell->noPLen;
1803 * Still more to print, look again after skipping
1804 * the whitespace following the non-printable
1808 while (*cp == ' ' || *cp == '\t' || *cp == '\n') {
1811 ecp = Str_FindSubstring(cp, commandShell->noPrint);
1821 *-----------------------------------------------------------------------
1823 * This function is called at different times depending on
1824 * whether the user has specified that output is to be collected
1825 * via pipes or temporary files. In the former case, we are called
1826 * whenever there is something to read on the pipe. We collect more
1827 * output from the given job and store it in the job's outBuf. If
1828 * this makes up a line, we print it tagged by the job's identifier,
1830 * If output has been collected in a temporary file, we open the
1831 * file and read it line by line, transfering it to our own
1832 * output channel until the file is empty. At which point we
1833 * remove the temporary file.
1834 * In both cases, however, we keep our figurative eye out for the
1835 * 'noPrint' line for the shell from which the output came. If
1836 * we recognize a line, we don't print it. If the command is not
1837 * alone on the line (the character after it is not \0 or \n), we
1838 * do print whatever follows it.
1841 * job the job whose output needs printing
1842 * finish TRUE if this is the last time we'll be called
1849 * curPos may be shifted as may the contents of outBuf.
1850 *-----------------------------------------------------------------------
1853 JobDoOutput(Job *job, Boolean finish)
1855 Boolean gotNL = FALSE; /* true if got a newline */
1856 Boolean fbuf; /* true if our buffer filled up */
1857 int nr; /* number of bytes read */
1858 int i; /* auxiliary index into outBuf */
1859 int max; /* limit for i (end of current data) */
1860 int nRead; /* (Temporary) number of bytes read */
1863 * Read as many bytes as will fit in the buffer.
1869 nRead = read(job->inPipe, &job->outBuf[job->curPos],
1870 JOB_BUFSIZE - job->curPos);
1872 if (errno == EAGAIN)
1875 perror("JobDoOutput(piperead)");
1883 * If we hit the end-of-file (the job is dead), we must flush its
1884 * remaining output, so pretend we read a newline if there's any
1885 * output remaining in the buffer.
1886 * Also clear the 'finish' flag so we stop looping.
1888 if ((nr == 0) && (job->curPos != 0)) {
1889 job->outBuf[job->curPos] = '\n';
1892 } else if (nr == 0) {
1897 * Look for the last newline in the bytes we just got. If there is
1898 * one, break out of the loop with 'i' as its index and gotNL set
1901 max = job->curPos + nr;
1902 for (i = job->curPos + nr - 1; i >= job->curPos; i--) {
1903 if (job->outBuf[i] == '\n') {
1906 } else if (job->outBuf[i] == '\0') {
1910 job->outBuf[i] = ' ';
1916 if (job->curPos == JOB_BUFSIZE) {
1918 * If we've run out of buffer space, we have no choice
1919 * but to print the stuff. sigh.
1925 if (gotNL || fbuf) {
1927 * Need to send the output to the screen. Null terminate it
1928 * first, overwriting the newline character if there was one.
1929 * So long as the line isn't one we should filter (according
1930 * to the shell description), we print the line, preceded
1931 * by a target banner if this target isn't the same as the
1932 * one for which we last printed something.
1933 * The rest of the data in the buffer are then shifted down
1934 * to the start of the buffer and curPos is set accordingly.
1936 job->outBuf[i] = '\0';
1937 if (i >= job->curPos) {
1940 cp = JobOutput(job, job->outBuf, &job->outBuf[i], FALSE);
1943 * There's still more in that thar buffer. This time, though,
1944 * we know there's no newline at the end, so we add one of
1945 * our own free will.
1948 if (!beSilent && job->node != lastNode) {
1949 MESSAGE(stdout, job->node);
1950 lastNode = job->node;
1954 meta_job_output(job, cp, gotNL ? "\n" : "");
1957 (void)fprintf(stdout, "%s%s", cp, gotNL ? "\n" : "");
1958 (void)fflush(stdout);
1962 * max is the last offset still in the buffer. Move any remaining
1963 * characters to the start of the buffer and update the end marker
1967 (void)memmove(job->outBuf, &job->outBuf[i + 1], max - (i + 1));
1968 job->curPos = max - (i + 1);
1976 * If the finish flag is true, we must loop until we hit
1977 * end-of-file on the pipe. This is guaranteed to happen
1978 * eventually since the other end of the pipe is now closed
1979 * (we closed it explicitly and the child has exited). When
1980 * we do get an EOF, finish will be set FALSE and we'll fall
1992 * Unfortunately it is too complicated to run .BEGIN, .END,
1993 * and .INTERRUPT job in the parallel job module. This has
1994 * the nice side effect that it avoids a lot of other problems.
1996 Lst lst = Lst_Init(FALSE);
1997 Lst_AtEnd(lst, targ);
1998 (void)Make_Run(lst);
1999 Lst_Destroy(lst, NULL);
2000 JobStart(targ, JOB_SPECIAL);
2001 while (jobTokensRunning) {
2005 Compat_Make(targ, targ);
2006 if (targ->made == ERROR) {
2007 PrintOnError(targ, "\n\nStop.");
2014 *-----------------------------------------------------------------------
2015 * Job_CatchChildren --
2016 * Handle the exit of a child. Called from Make_Make.
2019 * block TRUE if should block on the wait
2025 * The job descriptor is removed from the list of children.
2028 * We do waits, blocking or not, according to the wisdom of our
2029 * caller, until there are no more children to report. For each
2030 * job, call JobFinish to finish things off.
2032 *-----------------------------------------------------------------------
2036 Job_CatchChildren(void)
2038 int pid; /* pid of dead child */
2039 WAIT_T status; /* Exit/termination status */
2042 * Don't even bother if we know there's no one around.
2044 if (jobTokensRunning == 0)
2047 while ((pid = waitpid((pid_t) -1, &status, WNOHANG | WUNTRACED)) > 0) {
2049 (void)fprintf(debug_file, "Process %d exited/stopped status %x.\n", pid,
2050 WAIT_STATUS(status));
2052 JobReapChild(pid, status, TRUE);
2057 * It is possible that wait[pid]() was called from elsewhere,
2058 * this lets us reap jobs regardless.
2061 JobReapChild(pid_t pid, WAIT_T status, Boolean isJobs)
2063 Job *job; /* job descriptor for dead child */
2066 * Don't even bother if we know there's no one around.
2068 if (jobTokensRunning == 0)
2071 job = JobFindPid(pid, JOB_ST_RUNNING, isJobs);
2074 if (!lurking_children)
2075 Error("Child (%d) status %x not in table?", pid, status);
2077 return; /* not ours */
2079 if (WIFSTOPPED(status)) {
2081 (void)fprintf(debug_file, "Process %d (%s) stopped.\n",
2082 job->pid, job->node->name);
2084 if (!make_suspended) {
2085 switch (WSTOPSIG(status)) {
2087 (void)printf("*** [%s] Suspended\n", job->node->name);
2090 (void)printf("*** [%s] Stopped\n", job->node->name);
2093 (void)printf("*** [%s] Stopped -- signal %d\n",
2094 job->node->name, WSTOPSIG(status));
2096 job->job_suspended = 1;
2098 (void)fflush(stdout);
2102 job->job_state = JOB_ST_FINISHED;
2103 job->exit_status = WAIT_STATUS(status);
2105 JobFinish(job, status);
2109 *-----------------------------------------------------------------------
2110 * Job_CatchOutput --
2111 * Catch the output from our children, if we're using
2112 * pipes do so. Otherwise just block time until we get a
2113 * signal(most likely a SIGCHLD) since there's no point in
2114 * just spinning when there's nothing to do and the reaping
2115 * of a child can wait for a while.
2121 * Output is read from pipes if we're piping.
2122 * -----------------------------------------------------------------------
2125 Job_CatchOutput(void)
2131 (void)fflush(stdout);
2133 /* The first fd in the list is the job token pipe */
2135 nready = poll(fds + 1 - wantToken, nfds - 1 + wantToken, POLL_MSEC);
2136 } while (nready < 0 && errno == EINTR);
2139 Punt("poll: %s", strerror(errno));
2141 if (nready > 0 && readyfd(&childExitJob)) {
2144 count = read(childExitJob.inPipe, &token, 1);
2147 Punt("unexpected eof on token pipe");
2149 Punt("token pipe read: %s", strerror(errno));
2151 if (token == DO_JOB_RESUME[0])
2152 /* Complete relay requested from our SIGCONT handler */
2161 Job_CatchChildren();
2165 for (i = 2; i < nfds; i++) {
2166 if (!fds[i].revents)
2169 if (job->job_state == JOB_ST_RUNNING)
2170 JobDoOutput(job, FALSE);
2177 *-----------------------------------------------------------------------
2179 * Start the creation of a target. Basically a front-end for
2180 * JobStart used by the Make module.
2186 * Another job is started.
2188 *-----------------------------------------------------------------------
2193 (void)JobStart(gn, 0);
2199 if (shellPath == NULL) {
2201 * We are using the default shell, which may be an absolute
2202 * path if DEFSHELL_CUSTOM is defined.
2204 shellName = commandShell->name;
2205 #ifdef DEFSHELL_CUSTOM
2206 if (*shellName == '/') {
2207 shellPath = shellName;
2208 shellName = strrchr(shellPath, '/');
2212 shellPath = str_concat(_PATH_DEFSHELLDIR, shellName, STR_ADDSLASH);
2214 if (commandShell->exit == NULL) {
2215 commandShell->exit = "";
2217 if (commandShell->echo == NULL) {
2218 commandShell->echo = "";
2220 if (commandShell->hasErrCtl && *commandShell->exit) {
2222 strcmp(commandShell->exit, &shellErrFlag[1]) != 0) {
2224 shellErrFlag = NULL;
2226 if (!shellErrFlag) {
2227 int n = strlen(commandShell->exit) + 2;
2229 shellErrFlag = bmake_malloc(n);
2231 snprintf(shellErrFlag, n, "-%s", commandShell->exit);
2234 } else if (shellErrFlag) {
2236 shellErrFlag = NULL;
2241 * Returns the string literal that is used in the current command shell
2242 * to produce a newline character.
2245 Shell_GetNewline(void)
2248 return commandShell->newline;
2257 } else if (!Var_Exists(MAKE_JOB_PREFIX, VAR_GLOBAL)) {
2258 Var_Set(MAKE_JOB_PREFIX, "---", VAR_GLOBAL, 0);
2261 targPrefix = Var_Subst(NULL, "${" MAKE_JOB_PREFIX "}",
2262 VAR_GLOBAL, VARF_WANTRES);
2266 *-----------------------------------------------------------------------
2268 * Initialize the process module
2276 * lists and counters are initialized
2277 *-----------------------------------------------------------------------
2283 /* Allocate space for all the job info */
2284 job_table = bmake_malloc(maxJobs * sizeof *job_table);
2285 memset(job_table, 0, maxJobs * sizeof *job_table);
2286 job_table_end = job_table + maxJobs;
2294 Always_pass_job_queue = getBoolean(MAKE_ALWAYS_PASS_JOB_QUEUE,
2295 Always_pass_job_queue);
2297 Job_error_token = getBoolean(MAKE_JOB_ERROR_TOKEN, Job_error_token);
2301 * There is a non-zero chance that we already have children.
2302 * eg after 'make -f- <<EOF'
2303 * Since their termination causes a 'Child (pid) not in table' message,
2304 * Collect the status of any that are already dead, and suppress the
2305 * error message if there are any undead ones.
2309 rval = waitpid((pid_t) -1, &status, WNOHANG);
2313 lurking_children = 1;
2319 JobCreatePipe(&childExitJob, 3);
2321 /* We can only need to wait for tokens, children and output from each job */
2322 fds = bmake_malloc(sizeof (*fds) * (2 + maxJobs));
2323 jobfds = bmake_malloc(sizeof (*jobfds) * (2 + maxJobs));
2325 /* These are permanent entries and take slots 0 and 1 */
2326 watchfd(&tokenWaitJob);
2327 watchfd(&childExitJob);
2329 sigemptyset(&caught_signals);
2331 * Install a SIGCHLD handler.
2333 (void)bmake_signal(SIGCHLD, JobChildSig);
2334 sigaddset(&caught_signals, SIGCHLD);
2336 #define ADDSIG(s,h) \
2337 if (bmake_signal(s, SIG_IGN) != SIG_IGN) { \
2338 sigaddset(&caught_signals, s); \
2339 (void)bmake_signal(s, h); \
2343 * Catch the four signals that POSIX specifies if they aren't ignored.
2344 * JobPassSig will take care of calling JobInterrupt if appropriate.
2346 ADDSIG(SIGINT, JobPassSig_int)
2347 ADDSIG(SIGHUP, JobPassSig_term)
2348 ADDSIG(SIGTERM, JobPassSig_term)
2349 ADDSIG(SIGQUIT, JobPassSig_term)
2352 * There are additional signals that need to be caught and passed if
2353 * either the export system wants to be told directly of signals or if
2354 * we're giving each job its own process group (since then it won't get
2355 * signals from the terminal driver as we own the terminal)
2357 ADDSIG(SIGTSTP, JobPassSig_suspend)
2358 ADDSIG(SIGTTOU, JobPassSig_suspend)
2359 ADDSIG(SIGTTIN, JobPassSig_suspend)
2360 ADDSIG(SIGWINCH, JobCondPassSig)
2361 ADDSIG(SIGCONT, JobContinueSig)
2364 (void)Job_RunTarget(".BEGIN", NULL);
2365 postCommands = Targ_FindNode(".END", TARG_CREATE);
2368 static void JobSigReset(void)
2371 if (sigismember(&caught_signals, s)) { \
2372 (void)bmake_signal(s, SIG_DFL); \
2385 (void)bmake_signal(SIGCHLD, SIG_DFL);
2389 *-----------------------------------------------------------------------
2391 * Find a shell in 'shells' given its name.
2394 * A pointer to the Shell structure.
2399 *-----------------------------------------------------------------------
2402 JobMatchShell(const char *name)
2406 for (sh = shells; sh->name != NULL; sh++) {
2407 if (strcmp(name, sh->name) == 0)
2414 *-----------------------------------------------------------------------
2416 * Parse a shell specification and set up commandShell, shellPath
2417 * and shellName appropriately.
2420 * line The shell spec
2423 * FAILURE if the specification was incorrect.
2426 * commandShell points to a Shell structure (either predefined or
2427 * created from the shell spec), shellPath is the full path of the
2428 * shell described by commandShell, while shellName is just the
2429 * final component of shellPath.
2432 * A shell specification consists of a .SHELL target, with dependency
2433 * operator, followed by a series of blank-separated words. Double
2434 * quotes can be used to use blanks in words. A backslash escapes
2435 * anything (most notably a double-quote and a space) and
2436 * provides the functionality it does in C. Each word consists of
2437 * keyword and value separated by an equal sign. There should be no
2438 * unnecessary spaces in the word. The keywords are as follows:
2439 * name Name of shell.
2440 * path Location of shell.
2441 * quiet Command to turn off echoing.
2442 * echo Command to turn echoing on
2443 * filter Result of turning off echoing that shouldn't be
2445 * echoFlag Flag to turn echoing on at the start
2446 * errFlag Flag to turn error checking on at the start
2447 * hasErrCtl True if shell has error checking control
2448 * newline String literal to represent a newline char
2449 * check Command to turn on error checking if hasErrCtl
2450 * is TRUE or template of command to echo a command
2451 * for which error checking is off if hasErrCtl is
2453 * ignore Command to turn off error checking if hasErrCtl
2454 * is TRUE or template of command to execute a
2455 * command so as to ignore any errors it returns if
2456 * hasErrCtl is FALSE.
2458 *-----------------------------------------------------------------------
2461 Job_ParseShell(char *line)
2468 Boolean fullSpec = FALSE;
2471 while (isspace((unsigned char)*line)) {
2475 free(UNCONST(shellArgv));
2477 memset(&newShell, 0, sizeof(newShell));
2480 * Parse the specification by keyword
2482 words = brk_string(line, &argc, TRUE, &path);
2483 if (words == NULL) {
2484 Error("Unterminated quoted string [%s]", line);
2489 for (path = NULL, argv = words; argc != 0; argc--, argv++) {
2490 if (strncmp(*argv, "path=", 5) == 0) {
2492 } else if (strncmp(*argv, "name=", 5) == 0) {
2493 newShell.name = &argv[0][5];
2495 if (strncmp(*argv, "quiet=", 6) == 0) {
2496 newShell.echoOff = &argv[0][6];
2497 } else if (strncmp(*argv, "echo=", 5) == 0) {
2498 newShell.echoOn = &argv[0][5];
2499 } else if (strncmp(*argv, "filter=", 7) == 0) {
2500 newShell.noPrint = &argv[0][7];
2501 newShell.noPLen = strlen(newShell.noPrint);
2502 } else if (strncmp(*argv, "echoFlag=", 9) == 0) {
2503 newShell.echo = &argv[0][9];
2504 } else if (strncmp(*argv, "errFlag=", 8) == 0) {
2505 newShell.exit = &argv[0][8];
2506 } else if (strncmp(*argv, "hasErrCtl=", 10) == 0) {
2507 char c = argv[0][10];
2508 newShell.hasErrCtl = !((c != 'Y') && (c != 'y') &&
2509 (c != 'T') && (c != 't'));
2510 } else if (strncmp(*argv, "newline=", 8) == 0) {
2511 newShell.newline = &argv[0][8];
2512 } else if (strncmp(*argv, "check=", 6) == 0) {
2513 newShell.errCheck = &argv[0][6];
2514 } else if (strncmp(*argv, "ignore=", 7) == 0) {
2515 newShell.ignErr = &argv[0][7];
2516 } else if (strncmp(*argv, "errout=", 7) == 0) {
2517 newShell.errOut = &argv[0][7];
2518 } else if (strncmp(*argv, "comment=", 8) == 0) {
2519 newShell.commentChar = argv[0][8];
2521 Parse_Error(PARSE_FATAL, "Unknown keyword \"%s\"",
2532 * If no path was given, the user wants one of the pre-defined shells,
2533 * yes? So we find the one s/he wants with the help of JobMatchShell
2534 * and set things up the right way. shellPath will be set up by
2537 if (newShell.name == NULL) {
2538 Parse_Error(PARSE_FATAL, "Neither path nor name specified");
2542 if ((sh = JobMatchShell(newShell.name)) == NULL) {
2543 Parse_Error(PARSE_WARNING, "%s: No matching shell",
2549 shellName = newShell.name;
2551 /* Shell_Init has already been called! Do it again. */
2552 free(UNCONST(shellPath));
2559 * The user provided a path. If s/he gave nothing else (fullSpec is
2560 * FALSE), try and find a matching shell in the ones we know of.
2561 * Else we just take the specification at its word and copy it
2562 * to a new location. In either case, we need to record the
2563 * path the user gave for the shell.
2566 path = strrchr(path, '/');
2568 path = UNCONST(shellPath);
2572 if (newShell.name != NULL) {
2573 shellName = newShell.name;
2578 if ((sh = JobMatchShell(shellName)) == NULL) {
2579 Parse_Error(PARSE_WARNING, "%s: No matching shell",
2586 commandShell = bmake_malloc(sizeof(Shell));
2587 *commandShell = newShell;
2589 /* this will take care of shellErrFlag */
2593 if (commandShell->echoOn && commandShell->echoOff) {
2594 commandShell->hasEchoCtl = TRUE;
2597 if (!commandShell->hasErrCtl) {
2598 if (commandShell->errCheck == NULL) {
2599 commandShell->errCheck = "";
2601 if (commandShell->ignErr == NULL) {
2602 commandShell->ignErr = "%s\n";
2607 * Do not free up the words themselves, since they might be in use by the
2608 * shell specification.
2615 *-----------------------------------------------------------------------
2617 * Handle the receipt of an interrupt.
2620 * runINTERRUPT Non-zero if commands for the .INTERRUPT target
2621 * should be executed
2622 * signo signal received
2628 * All children are killed. Another job will be started if the
2629 * .INTERRUPT target was given.
2630 *-----------------------------------------------------------------------
2633 JobInterrupt(int runINTERRUPT, int signo)
2635 Job *job; /* job descriptor in that element */
2636 GNode *interrupt; /* the node describing the .INTERRUPT target */
2640 aborting = ABORT_INTERRUPT;
2644 for (job = job_table; job < job_table_end; job++) {
2645 if (job->job_state != JOB_ST_RUNNING)
2650 JobDeleteTarget(gn);
2653 (void)fprintf(debug_file,
2654 "JobInterrupt passing signal %d to child %d.\n",
2657 KILLPG(job->pid, signo);
2661 JobSigUnlock(&mask);
2663 if (runINTERRUPT && !touchFlag) {
2664 interrupt = Targ_FindNode(".INTERRUPT", TARG_NOCREATE);
2665 if (interrupt != NULL) {
2666 ignoreErrors = FALSE;
2670 Trace_Log(MAKEINTR, 0);
2675 *-----------------------------------------------------------------------
2677 * Do final processing such as the running of the commands
2678 * attached to the .END target.
2681 * Number of errors reported.
2685 *-----------------------------------------------------------------------
2690 if (postCommands != NULL &&
2691 (!Lst_IsEmpty(postCommands->commands) ||
2692 !Lst_IsEmpty(postCommands->children))) {
2694 Error("Errors reported so .END ignored");
2696 JobRun(postCommands);
2703 *-----------------------------------------------------------------------
2705 * Cleanup any memory used by the jobs module
2712 *-----------------------------------------------------------------------
2723 *-----------------------------------------------------------------------
2725 * Waits for all running jobs to finish and returns. Sets 'aborting'
2726 * to ABORT_WAIT to prevent other jobs from starting.
2732 * Currently running jobs finish.
2734 *-----------------------------------------------------------------------
2739 aborting = ABORT_WAIT;
2740 while (jobTokensRunning != 0) {
2747 *-----------------------------------------------------------------------
2749 * Abort all currently running jobs without handling output or anything.
2750 * This function is to be called only in the event of a major
2751 * error. Most definitely NOT to be called from JobInterrupt.
2757 * All children are killed, not just the firstborn
2758 *-----------------------------------------------------------------------
2763 Job *job; /* the job descriptor in that element */
2766 aborting = ABORT_ERROR;
2768 if (jobTokensRunning) {
2769 for (job = job_table; job < job_table_end; job++) {
2770 if (job->job_state != JOB_ST_RUNNING)
2773 * kill the child process with increasingly drastic signals to make
2774 * darn sure it's dead.
2776 KILLPG(job->pid, SIGINT);
2777 KILLPG(job->pid, SIGKILL);
2782 * Catch as many children as want to report in at first, then give up
2784 while (waitpid((pid_t) -1, &foo, WNOHANG) > 0)
2790 *-----------------------------------------------------------------------
2792 * Tries to restart stopped jobs if there are slots available.
2793 * Called in process context in response to a SIGCONT.
2801 *-----------------------------------------------------------------------
2804 JobRestartJobs(void)
2808 for (job = job_table; job < job_table_end; job++) {
2809 if (job->job_state == JOB_ST_RUNNING &&
2810 (make_suspended || job->job_suspended)) {
2812 (void)fprintf(debug_file, "Restarting stopped job pid %d.\n",
2815 if (job->job_suspended) {
2816 (void)printf("*** [%s] Continued\n", job->node->name);
2817 (void)fflush(stdout);
2819 job->job_suspended = 0;
2820 if (KILLPG(job->pid, SIGCONT) != 0 && DEBUG(JOB)) {
2821 fprintf(debug_file, "Failed to send SIGCONT to %d\n", job->pid);
2824 if (job->job_state == JOB_ST_FINISHED)
2825 /* Job exit deferred after calling waitpid() in a signal handler */
2826 JobFinish(job, job->exit_status);
2834 if (job->inPollfd != NULL)
2835 Punt("Watching watched job");
2837 fds[nfds].fd = job->inPipe;
2838 fds[nfds].events = POLLIN;
2840 job->inPollfd = &fds[nfds];
2848 if (job->inPollfd == NULL)
2849 Punt("Unwatching unwatched job");
2850 i = job->inPollfd - fds;
2853 * Move last job in table into hole made by dead job.
2857 jobfds[i] = jobfds[nfds];
2858 jobfds[i]->inPollfd = &fds[i];
2860 job->inPollfd = NULL;
2866 if (job->inPollfd == NULL)
2867 Punt("Polling unwatched job");
2868 return (job->inPollfd->revents & POLLIN) != 0;
2872 *-----------------------------------------------------------------------
2874 * Put a token into the job pipe so that some make process can start
2878 * Allows more build jobs to be spawned somewhere.
2880 *-----------------------------------------------------------------------
2886 char tok = JOB_TOKENS[aborting], tok1;
2888 if (!Job_error_token && aborting == ABORT_ERROR) {
2889 if (jobTokensRunning == 0)
2891 tok = '+'; /* no error token */
2894 /* If we are depositing an error token flush everything else */
2895 while (tok != '+' && read(tokenWaitJob.inPipe, &tok1, 1) == 1)
2899 fprintf(debug_file, "(%d) aborting %d, deposit token %c\n",
2900 getpid(), aborting, tok);
2901 while (write(tokenWaitJob.outPipe, &tok, 1) == -1 && errno == EAGAIN)
2906 *-----------------------------------------------------------------------
2907 * Job_ServerStartTokenAdd --
2908 * Prep the job token pipe in the root make process.
2910 *-----------------------------------------------------------------------
2914 Job_ServerStart(int max_tokens, int jp_0, int jp_1)
2919 if (jp_0 >= 0 && jp_1 >= 0) {
2920 /* Pipe passed in from parent */
2921 tokenWaitJob.inPipe = jp_0;
2922 tokenWaitJob.outPipe = jp_1;
2923 (void)fcntl(jp_0, F_SETFD, FD_CLOEXEC);
2924 (void)fcntl(jp_1, F_SETFD, FD_CLOEXEC);
2928 JobCreatePipe(&tokenWaitJob, 15);
2930 snprintf(jobarg, sizeof(jobarg), "%d,%d",
2931 tokenWaitJob.inPipe, tokenWaitJob.outPipe);
2933 Var_Append(MAKEFLAGS, "-J", VAR_GLOBAL);
2934 Var_Append(MAKEFLAGS, jobarg, VAR_GLOBAL);
2937 * Preload the job pipe with one token per job, save the one
2938 * "extra" token for the primary job.
2940 * XXX should clip maxJobs against PIPE_BUF -- if max_tokens is
2941 * larger than the write buffer size of the pipe, we will
2944 for (i = 1; i < max_tokens; i++)
2949 *-----------------------------------------------------------------------
2950 * Job_TokenReturn --
2951 * Return a withdrawn token to the pool.
2953 *-----------------------------------------------------------------------
2957 Job_TokenReturn(void)
2960 if (jobTokensRunning < 0)
2961 Punt("token botch");
2962 if (jobTokensRunning || JOB_TOKENS[aborting] != '+')
2967 *-----------------------------------------------------------------------
2968 * Job_TokenWithdraw --
2969 * Attempt to withdraw a token from the pool.
2972 * Returns TRUE if a token was withdrawn, and FALSE if the pool
2973 * is currently empty.
2976 * If pool is empty, set wantToken so that we wake up
2977 * when a token is released.
2979 *-----------------------------------------------------------------------
2984 Job_TokenWithdraw(void)
2991 fprintf(debug_file, "Job_TokenWithdraw(%d): aborting %d, running %d\n",
2992 getpid(), aborting, jobTokensRunning);
2994 if (aborting || (jobTokensRunning >= maxJobs))
2997 count = read(tokenWaitJob.inPipe, &tok, 1);
2999 Fatal("eof on job pipe!");
3000 if (count < 0 && jobTokensRunning != 0) {
3001 if (errno != EAGAIN) {
3002 Fatal("job pipe read: %s", strerror(errno));
3005 fprintf(debug_file, "(%d) blocked for token\n", getpid());
3010 if (count == 1 && tok != '+') {
3011 /* make being abvorted - remove any other job tokens */
3013 fprintf(debug_file, "(%d) aborted by token %c\n", getpid(), tok);
3014 while (read(tokenWaitJob.inPipe, &tok1, 1) == 1)
3016 /* And put the stopper back */
3017 while (write(tokenWaitJob.outPipe, &tok, 1) == -1 && errno == EAGAIN)
3019 Fatal("A failure has been detected in another branch of the parallel make");
3022 if (count == 1 && jobTokensRunning == 0)
3023 /* We didn't want the token really */
3024 while (write(tokenWaitJob.outPipe, &tok, 1) == -1 && errno == EAGAIN)
3029 fprintf(debug_file, "(%d) withdrew token\n", getpid());
3034 *-----------------------------------------------------------------------
3036 * Run the named target if found. If a filename is specified, then
3037 * set that to the sources.
3043 * exits if the target fails.
3045 *-----------------------------------------------------------------------
3048 Job_RunTarget(const char *target, const char *fname) {
3049 GNode *gn = Targ_FindNode(target, TARG_NOCREATE);
3055 Var_Set(ALLSRC, fname, gn, 0);
3058 if (gn->made == ERROR) {
3059 PrintOnError(gn, "\n\nStop.");
3067 emul_poll(struct pollfd *fd, int nfd, int timeout)
3070 int i, maxfd, nselect, npoll;
3071 struct timeval tv, *tvp;
3078 for (i = 0; i < nfd; i++) {
3081 if (fd[i].events & POLLIN)
3082 FD_SET(fd[i].fd, &rfds);
3084 if (fd[i].events & POLLOUT)
3085 FD_SET(fd[i].fd, &wfds);
3087 if (fd[i].fd > maxfd)
3091 if (maxfd >= FD_SETSIZE) {
3092 Punt("Ran out of fd_set slots; "
3093 "recompile with a larger FD_SETSIZE.");
3099 usecs = timeout * 1000;
3100 tv.tv_sec = usecs / 1000000;
3101 tv.tv_usec = usecs % 1000000;
3105 nselect = select(maxfd + 1, &rfds, &wfds, 0, tvp);
3111 for (i = 0; i < nfd; i++) {
3112 if (FD_ISSET(fd[i].fd, &rfds))
3113 fd[i].revents |= POLLIN;
3115 if (FD_ISSET(fd[i].fd, &wfds))
3116 fd[i].revents |= POLLOUT;
3124 #endif /* USE_SELECT */