1 /* $NetBSD: job.c,v 1.176 2013/08/04 16:48:15 sjg 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 1.176 2013/08/04 16:48:15 sjg Exp $";
75 #include <sys/cdefs.h>
78 static char sccsid[] = "@(#)job.c 8.2 (Berkeley) 3/19/94";
80 __RCSID("$NetBSD: job.c,v 1.176 2013/08/04 16:48:15 sjg 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>
148 #if !defined(USE_SELECT) && defined(HAVE_POLL_H)
151 #ifndef USE_SELECT /* no poll.h */
154 #if defined(HAVE_SYS_SELECT_H)
155 # include <sys/select.h>
162 #if defined(HAVE_SYS_SOCKET_H)
163 # include <sys/socket.h>
170 #include "pathnames.h"
172 # define STATIC static
175 * FreeBSD: traditionally .MAKE is not required to
176 * pass jobs queue to sub-makes.
177 * Use .MAKE.ALWAYS_PASS_JOB_QUEUE=no to disable.
179 #define MAKE_ALWAYS_PASS_JOB_QUEUE ".MAKE.ALWAYS_PASS_JOB_QUEUE"
180 static int Always_pass_job_queue = TRUE;
182 * FreeBSD: aborting entire parallel make isn't always
183 * desired. When doing tinderbox for example, failure of
184 * one architecture should not stop all.
185 * We still want to bail on interrupt though.
187 #define MAKE_JOB_ERROR_TOKEN "MAKE_JOB_ERROR_TOKEN"
188 static int Job_error_token = TRUE;
191 * error handling variables
193 static int errors = 0; /* number of errors reported */
194 static int aborting = 0; /* why is the make aborting? */
195 #define ABORT_ERROR 1 /* Because of an error */
196 #define ABORT_INTERRUPT 2 /* Because it was interrupted */
197 #define ABORT_WAIT 3 /* Waiting for jobs to finish */
198 #define JOB_TOKENS "+EI+" /* Token to requeue for each abort state */
201 * this tracks the number of tokens currently "out" to build jobs.
203 int jobTokensRunning = 0;
204 int not_parallel = 0; /* set if .NOT_PARALLEL */
207 * XXX: Avoid SunOS bug... FILENO() is fp->_file, and file
208 * is a char! So when we go above 127 we turn negative!
210 #define FILENO(a) ((unsigned) fileno(a))
213 * post-make command processing. The node postCommands is really just the
214 * .END target but we keep it around to avoid having to search for it
217 static GNode *postCommands = NULL;
218 /* node containing commands to execute when
219 * everything else is done */
220 static int numCommands; /* The number of commands actually printed
221 * for a target. Should this number be
222 * 0, no shell will be executed. */
225 * Return values from JobStart.
227 #define JOB_RUNNING 0 /* Job is running */
228 #define JOB_ERROR 1 /* Error in starting the job */
229 #define JOB_FINISHED 2 /* The job is already finished */
232 * Descriptions for various shells.
234 * The build environment may set DEFSHELL_INDEX to one of
235 * DEFSHELL_INDEX_SH, DEFSHELL_INDEX_KSH, or DEFSHELL_INDEX_CSH, to
236 * select one of the prefedined shells as the default shell.
238 * Alternatively, the build environment may set DEFSHELL_CUSTOM to the
239 * name or the full path of a sh-compatible shell, which will be used as
242 * ".SHELL" lines in Makefiles can choose the default shell from the
243 # set defined here, or add additional shells.
246 #ifdef DEFSHELL_CUSTOM
247 #define DEFSHELL_INDEX_CUSTOM 0
248 #define DEFSHELL_INDEX_SH 1
249 #define DEFSHELL_INDEX_KSH 2
250 #define DEFSHELL_INDEX_CSH 3
251 #else /* !DEFSHELL_CUSTOM */
252 #define DEFSHELL_INDEX_SH 0
253 #define DEFSHELL_INDEX_KSH 1
254 #define DEFSHELL_INDEX_CSH 2
255 #endif /* !DEFSHELL_CUSTOM */
257 #ifndef DEFSHELL_INDEX
258 #define DEFSHELL_INDEX 0 /* DEFSHELL_INDEX_CUSTOM or DEFSHELL_INDEX_SH */
259 #endif /* !DEFSHELL_INDEX */
261 static Shell shells[] = {
262 #ifdef DEFSHELL_CUSTOM
264 * An sh-compatible shell with a non-standard name.
266 * Keep this in sync with the "sh" description below, but avoid
267 * non-portable features that might not be supplied by all
268 * sh-compatible shells.
272 FALSE, "", "", "", 0,
273 FALSE, "echo \"%s\"\n", "%s\n", "{ %s \n} || exit $?\n", "'\n'", '#',
277 #endif /* DEFSHELL_CUSTOM */
279 * SH description. Echo control is also possible and, under
280 * sun UNIX anyway, one can even control error checking.
284 FALSE, "", "", "", 0,
285 FALSE, "echo \"%s\"\n", "%s\n", "{ %s \n} || exit $?\n", "'\n'", '#',
286 #if defined(MAKE_NATIVE) && defined(__NetBSD__)
298 TRUE, "set +v", "set -v", "set +v", 6,
299 FALSE, "echo \"%s\"\n", "%s\n", "{ %s \n} || exit $?\n", "'\n'", '#',
304 * CSH description. The csh can do echo control by playing
305 * with the setting of the 'echo' shell variable. Sadly,
306 * however, it is unable to do error control nicely.
310 TRUE, "unset verbose", "set verbose", "unset verbose", 10,
311 FALSE, "echo \"%s\"\n", "csh -c \"%s || exit 0\"\n", "", "'\\\n'", '#',
319 FALSE, NULL, NULL, NULL, 0,
320 FALSE, NULL, NULL, NULL, NULL, 0,
324 static Shell *commandShell = &shells[DEFSHELL_INDEX]; /* this is the shell to
326 * commands in the Makefile.
328 * Job_ParseShell function */
329 const char *shellPath = NULL, /* full pathname of
330 * executable image */
331 *shellName = NULL; /* last component of shell */
332 char *shellErrFlag = NULL;
333 static const char *shellArgv = NULL; /* Custom shell args */
336 STATIC Job *job_table; /* The structures that describe them */
337 STATIC Job *job_table_end; /* job_table + maxJobs */
338 static int wantToken; /* we want a token */
339 static int lurking_children = 0;
340 static int make_suspended = 0; /* non-zero if we've seen a SIGTSTP (etc) */
343 * Set of descriptors of pipes connected to
344 * the output channels of children
346 static struct pollfd *fds = NULL;
347 static Job **jobfds = NULL;
349 static void watchfd(Job *);
350 static void clearfd(Job *);
351 static int readyfd(Job *);
353 STATIC GNode *lastNode; /* The node for which output was most recently
355 static char *targPrefix = NULL; /* What we print at the start of TARG_FMT */
356 static Job tokenWaitJob; /* token wait pseudo-job */
358 static Job childExitJob; /* child exit pseudo-job */
359 #define CHILD_EXIT "."
360 #define DO_JOB_RESUME "R"
362 #define TARG_FMT "%s %s ---\n" /* Default format */
363 #define MESSAGE(fp, gn) \
364 if (maxJobs != 1 && targPrefix && *targPrefix) \
365 (void)fprintf(fp, TARG_FMT, targPrefix, gn->name)
367 static sigset_t caught_signals; /* Set of signals we handle */
369 #define KILLPG(pid, sig) kill(-(pid), (sig))
371 #define KILLPG(pid, sig) killpg((pid), (sig))
374 static void JobChildSig(int);
375 static void JobContinueSig(int);
376 static Job *JobFindPid(int, int, Boolean);
377 static int JobPrintCommand(void *, void *);
378 static int JobSaveCommand(void *, void *);
379 static void JobClose(Job *);
380 static void JobExec(Job *, char **);
381 static void JobMakeArgv(Job *, char **);
382 static int JobStart(GNode *, int);
383 static char *JobOutput(Job *, char *, char *, int);
384 static void JobDoOutput(Job *, Boolean);
385 static Shell *JobMatchShell(const char *);
386 static void JobInterrupt(int, int) MAKE_ATTR_DEAD;
387 static void JobRestartJobs(void);
388 static void JobTokenAdd(void);
389 static void JobSigLock(sigset_t *);
390 static void JobSigUnlock(sigset_t *);
391 static void JobSigReset(void);
393 const char *malloc_options="A";
396 job_table_dump(const char *where)
400 fprintf(debug_file, "job table @ %s\n", where);
401 for (job = job_table; job < job_table_end; job++) {
402 fprintf(debug_file, "job %d, status %d, flags %d, pid %d\n",
403 (int)(job - job_table), job->job_state, job->flags, job->pid);
408 * JobSigLock/JobSigUnlock
410 * Signal lock routines to get exclusive access. Currently used to
411 * protect `jobs' and `stoppedJobs' list manipulations.
413 static void JobSigLock(sigset_t *omaskp)
415 if (sigprocmask(SIG_BLOCK, &caught_signals, omaskp) != 0) {
416 Punt("JobSigLock: sigprocmask: %s", strerror(errno));
421 static void JobSigUnlock(sigset_t *omaskp)
423 (void)sigprocmask(SIG_SETMASK, omaskp, NULL);
427 JobCreatePipe(Job *job, int minfd)
431 if (pipe(job->jobPipe) == -1)
432 Punt("Cannot create pipe: %s", strerror(errno));
434 for (i = 0; i < 2; i++) {
435 /* Avoid using low numbered fds */
436 fd = fcntl(job->jobPipe[i], F_DUPFD, minfd);
438 close(job->jobPipe[i]);
439 job->jobPipe[i] = fd;
443 /* Set close-on-exec flag for both */
444 (void)fcntl(job->jobPipe[0], F_SETFD, 1);
445 (void)fcntl(job->jobPipe[1], F_SETFD, 1);
448 * We mark the input side of the pipe non-blocking; we poll(2) the
449 * pipe when we're waiting for a job token, but we might lose the
450 * race for the token when a new one becomes available, so the read
451 * from the pipe should not block.
453 fcntl(job->jobPipe[0], F_SETFL,
454 fcntl(job->jobPipe[0], F_GETFL, 0) | O_NONBLOCK);
458 *-----------------------------------------------------------------------
460 * Pass a signal to a job
463 * signop Signal to send it
466 * None, except the job may bite it.
468 *-----------------------------------------------------------------------
471 JobCondPassSig(int signo)
476 (void)fprintf(debug_file, "JobCondPassSig(%d) called.\n", signo);
479 for (job = job_table; job < job_table_end; job++) {
480 if (job->job_state != JOB_ST_RUNNING)
483 (void)fprintf(debug_file,
484 "JobCondPassSig passing signal %d to child %d.\n",
487 KILLPG(job->pid, signo);
492 *-----------------------------------------------------------------------
497 * signo The signal number we've received
503 * Sends a token on the child exit pipe to wake us up from
506 *-----------------------------------------------------------------------
509 JobChildSig(int signo MAKE_ATTR_UNUSED)
511 while (write(childExitJob.outPipe, CHILD_EXIT, 1) == -1 && errno == EAGAIN)
517 *-----------------------------------------------------------------------
519 * Resume all stopped jobs.
522 * signo The signal number we've received
528 * Jobs start running again.
530 *-----------------------------------------------------------------------
533 JobContinueSig(int signo MAKE_ATTR_UNUSED)
536 * Defer sending to SIGCONT to our stopped children until we return
537 * from the signal handler.
539 while (write(childExitJob.outPipe, DO_JOB_RESUME, 1) == -1 &&
545 *-----------------------------------------------------------------------
547 * Pass a signal on to all jobs, then resend to ourselves.
550 * signo The signal number we've received
556 * We die by the same signal.
558 *-----------------------------------------------------------------------
560 MAKE_ATTR_DEAD static void
561 JobPassSig_int(int signo)
563 /* Run .INTERRUPT target then exit */
564 JobInterrupt(TRUE, signo);
567 MAKE_ATTR_DEAD static void
568 JobPassSig_term(int signo)
570 /* Dont run .INTERRUPT target then exit */
571 JobInterrupt(FALSE, signo);
575 JobPassSig_suspend(int signo)
577 sigset_t nmask, omask;
578 struct sigaction act;
580 /* Suppress job started/continued messages */
583 /* Pass the signal onto every job */
584 JobCondPassSig(signo);
587 * Send ourselves the signal now we've given the message to everyone else.
588 * Note we block everything else possible while we're getting the signal.
589 * This ensures that all our jobs get continued when we wake up before
590 * we take any other signal.
593 sigdelset(&nmask, signo);
594 (void)sigprocmask(SIG_SETMASK, &nmask, &omask);
596 act.sa_handler = SIG_DFL;
597 sigemptyset(&act.sa_mask);
599 (void)sigaction(signo, &act, NULL);
602 (void)fprintf(debug_file,
603 "JobPassSig passing signal %d to self.\n", signo);
606 (void)kill(getpid(), signo);
609 * We've been continued.
611 * A whole host of signals continue to happen!
612 * SIGCHLD for any processes that actually suspended themselves.
613 * SIGCHLD for any processes that exited while we were alseep.
614 * The SIGCONT that actually caused us to wakeup.
616 * Since we defer passing the SIGCONT on to our children until
617 * the main processing loop, we can be sure that all the SIGCHLD
618 * events will have happened by then - and that the waitpid() will
619 * collect the child 'suspended' events.
620 * For correct sequencing we just need to ensure we process the
621 * waitpid() before passign on the SIGCONT.
623 * In any case nothing else is needed here.
626 /* Restore handler and signal mask */
627 act.sa_handler = JobPassSig_suspend;
628 (void)sigaction(signo, &act, NULL);
629 (void)sigprocmask(SIG_SETMASK, &omask, NULL);
633 *-----------------------------------------------------------------------
635 * Compare the pid of the job with the given pid and return 0 if they
636 * are equal. This function is called from Job_CatchChildren
637 * to find the job descriptor of the finished job.
641 * pid process id desired
644 * Job with matching pid
648 *-----------------------------------------------------------------------
651 JobFindPid(int pid, int status, Boolean isJobs)
655 for (job = job_table; job < job_table_end; job++) {
656 if ((job->job_state == status) && job->pid == pid)
659 if (DEBUG(JOB) && isJobs)
660 job_table_dump("no pid");
665 *-----------------------------------------------------------------------
667 * Put out another command for the given job. If the command starts
668 * with an @ or a - we process it specially. In the former case,
669 * so long as the -s and -n flags weren't given to make, we stick
670 * a shell-specific echoOff command in the script. In the latter,
671 * we ignore errors for the entire job, unless the shell has error
673 * If the command is just "..." we take all future commands for this
674 * job to be commands to be executed once the entire graph has been
675 * made and return non-zero to signal that the end of the commands
676 * was reached. These commands are later attached to the postCommands
677 * node and executed by Job_End when all things are done.
678 * This function is called from JobStart via Lst_ForEach.
681 * cmdp command string to print
682 * jobp job for which to print it
685 * Always 0, unless the command was "..."
688 * If the command begins with a '-' and the shell has no error control,
689 * the JOB_IGNERR flag is set in the job descriptor.
690 * If the command is "..." and we're not ignoring such things,
691 * tailCmds is set to the successor node of the cmd.
692 * numCommands is incremented if the command is actually printed.
693 *-----------------------------------------------------------------------
696 JobPrintCommand(void *cmdp, void *jobp)
698 Boolean noSpecials; /* true if we shouldn't worry about
699 * inserting special commands into
700 * the input stream. */
701 Boolean shutUp = FALSE; /* true if we put a no echo command
702 * into the command file */
703 Boolean errOff = FALSE; /* true if we turned error checking
704 * off before printing the command
705 * and need to turn it back on */
706 const char *cmdTemplate; /* Template to use when printing the
708 char *cmdStart; /* Start of expanded command */
709 char *escCmd = NULL; /* Command with quotes/backticks escaped */
710 char *cmd = (char *)cmdp;
711 Job *job = (Job *)jobp;
714 noSpecials = NoExecute(job->node);
716 if (strcmp(cmd, "...") == 0) {
717 job->node->type |= OP_SAVE_CMDS;
718 if ((job->flags & JOB_IGNDOTS) == 0) {
719 job->tailCmds = Lst_Succ(Lst_Member(job->node->commands,
726 #define DBPRINTF(fmt, arg) if (DEBUG(JOB)) { \
727 (void)fprintf(debug_file, fmt, arg); \
729 (void)fprintf(job->cmdFILE, fmt, arg); \
730 (void)fflush(job->cmdFILE);
734 cmdStart = cmd = Var_Subst(NULL, cmd, job->node, FALSE);
736 cmdTemplate = "%s\n";
739 * Check for leading @' and -'s to control echoing and error checking.
741 while (*cmd == '@' || *cmd == '-' || (*cmd == '+')) {
744 shutUp = DEBUG(LOUD) ? FALSE : TRUE;
747 job->flags |= JOB_IGNERR;
753 * We're not actually executing anything...
754 * but this one needs to be - use compat mode just for it.
756 CompatRunCommand(cmdp, job->node);
764 while (isspace((unsigned char) *cmd))
768 * If the shell doesn't have error control the alternate echo'ing will
769 * be done (to avoid showing additional error checking code)
770 * and this will need the characters '$ ` \ "' escaped
773 if (!commandShell->hasErrCtl) {
774 /* Worst that could happen is every char needs escaping. */
775 escCmd = bmake_malloc((strlen(cmd) * 2) + 1);
776 for (i = 0, j= 0; cmd[i] != '\0'; i++, j++) {
777 if (cmd[i] == '$' || cmd[i] == '`' || cmd[i] == '\\' ||
786 if (!(job->flags & JOB_SILENT) && !noSpecials &&
787 commandShell->hasEchoCtl) {
788 DBPRINTF("%s\n", commandShell->echoOff);
790 if (commandShell->hasErrCtl)
797 if (commandShell->hasErrCtl) {
799 * we don't want the error-control commands showing
800 * up either, so we turn off echoing while executing
801 * them. We could put another field in the shell
802 * structure to tell JobDoOutput to look for this
803 * string too, but why make it any more complex than
806 if (!(job->flags & JOB_SILENT) && !shutUp &&
807 commandShell->hasEchoCtl) {
808 DBPRINTF("%s\n", commandShell->echoOff);
809 DBPRINTF("%s\n", commandShell->ignErr);
810 DBPRINTF("%s\n", commandShell->echoOn);
812 DBPRINTF("%s\n", commandShell->ignErr);
814 } else if (commandShell->ignErr &&
815 (*commandShell->ignErr != '\0'))
818 * The shell has no error control, so we need to be
819 * weird to get it to ignore any errors from the command.
820 * If echoing is turned on, we turn it off and use the
821 * errCheck template to echo the command. Leave echoing
822 * off so the user doesn't see the weirdness we go through
823 * to ignore errors. Set cmdTemplate to use the weirdness
824 * instead of the simple "%s\n" template.
826 if (!(job->flags & JOB_SILENT) && !shutUp) {
827 if (commandShell->hasEchoCtl) {
828 DBPRINTF("%s\n", commandShell->echoOff);
830 DBPRINTF(commandShell->errCheck, escCmd);
834 DBPRINTF(commandShell->errCheck, escCmd);
837 cmdTemplate = commandShell->ignErr;
839 * The error ignoration (hee hee) is already taken care
840 * of by the ignErr template, so pretend error checking
853 * If errors are being checked and the shell doesn't have error control
854 * but does supply an errOut template, then setup commands to run
858 if (!commandShell->hasErrCtl && commandShell->errOut &&
859 (*commandShell->errOut != '\0')) {
860 if (!(job->flags & JOB_SILENT) && !shutUp) {
861 if (commandShell->hasEchoCtl) {
862 DBPRINTF("%s\n", commandShell->echoOff);
864 DBPRINTF(commandShell->errCheck, escCmd);
867 /* If it's a comment line or blank, treat as an ignored error */
868 if ((escCmd[0] == commandShell->commentChar) ||
870 cmdTemplate = commandShell->ignErr;
872 cmdTemplate = commandShell->errOut;
877 if (DEBUG(SHELL) && strcmp(shellName, "sh") == 0 &&
878 (job->flags & JOB_TRACED) == 0) {
879 DBPRINTF("set -%s\n", "x");
880 job->flags |= JOB_TRACED;
883 DBPRINTF(cmdTemplate, cmd);
889 * If echoing is already off, there's no point in issuing the
890 * echoOff command. Otherwise we issue it and pretend it was on
891 * for the whole command...
893 if (!shutUp && !(job->flags & JOB_SILENT) && commandShell->hasEchoCtl){
894 DBPRINTF("%s\n", commandShell->echoOff);
897 DBPRINTF("%s\n", commandShell->errCheck);
899 if (shutUp && commandShell->hasEchoCtl) {
900 DBPRINTF("%s\n", commandShell->echoOn);
906 *-----------------------------------------------------------------------
908 * Save a command to be executed when everything else is done.
909 * Callback function for JobFinish...
915 * The command is tacked onto the end of postCommands's commands list.
917 *-----------------------------------------------------------------------
920 JobSaveCommand(void *cmd, void *gn)
922 cmd = Var_Subst(NULL, (char *)cmd, (GNode *)gn, FALSE);
923 (void)Lst_AtEnd(postCommands->commands, cmd);
929 *-----------------------------------------------------------------------
931 * Called to close both input and output pipes when a job is finished.
937 * The file descriptors associated with the job are closed.
939 *-----------------------------------------------------------------------
945 (void)close(job->outPipe);
948 JobDoOutput(job, TRUE);
949 (void)close(job->inPipe);
954 *-----------------------------------------------------------------------
956 * Do final processing for the given job including updating
957 * parents and starting new jobs as available/necessary. Note
958 * that we pay no attention to the JOB_IGNERR flag here.
959 * This is because when we're called because of a noexecute flag
960 * or something, jstat.w_status is 0 and when called from
961 * Job_CatchChildren, the status is zeroed if it s/b ignored.
965 * status sub-why job went away
971 * Final commands for the job are placed on postCommands.
973 * If we got an error and are aborting (aborting == ABORT_ERROR) and
974 * the job list is now empty, we are done for the day.
975 * If we recognized an error (errors !=0), we set the aborting flag
976 * to ABORT_ERROR so no more jobs will be started.
977 *-----------------------------------------------------------------------
981 JobFinish (Job *job, WAIT_T status)
983 Boolean done, return_job_token;
986 fprintf(debug_file, "Jobfinish: %d [%s], status %d\n",
987 job->pid, job->node->name, status);
990 if ((WIFEXITED(status) &&
991 (((WEXITSTATUS(status) != 0) && !(job->flags & JOB_IGNERR)))) ||
995 * If it exited non-zero and either we're doing things our
996 * way or we're not ignoring errors, the job is finished.
997 * Similarly, if the shell died because of a signal
998 * the job is also finished. In these
999 * cases, finish out the job's output before printing the exit
1003 if (job->cmdFILE != NULL && job->cmdFILE != stdout) {
1004 (void)fclose(job->cmdFILE);
1005 job->cmdFILE = NULL;
1008 } else if (WIFEXITED(status)) {
1010 * Deal with ignored errors in -B mode. We need to print a message
1011 * telling of the ignored error as well as setting status.w_status
1012 * to 0 so the next command gets run. To do this, we set done to be
1013 * TRUE if in -B mode and the job exited non-zero.
1015 done = WEXITSTATUS(status) != 0;
1017 * Old comment said: "Note we don't
1018 * want to close down any of the streams until we know we're at the
1020 * But we do. Otherwise when are we going to print the rest of the
1026 * No need to close things down or anything.
1032 if (WIFEXITED(status)) {
1034 (void)fprintf(debug_file, "Process %d [%s] exited.\n",
1035 job->pid, job->node->name);
1037 if (WEXITSTATUS(status) != 0) {
1038 if (job->node != lastNode) {
1039 MESSAGE(stdout, job->node);
1040 lastNode = job->node;
1044 meta_job_error(job, job->node, job->flags, WEXITSTATUS(status));
1047 (void)printf("*** [%s] Error code %d%s\n",
1049 WEXITSTATUS(status),
1050 (job->flags & JOB_IGNERR) ? " (ignored)" : "");
1051 if (job->flags & JOB_IGNERR) {
1052 WAIT_STATUS(status) = 0;
1054 PrintOnError(job->node, NULL);
1056 } else if (DEBUG(JOB)) {
1057 if (job->node != lastNode) {
1058 MESSAGE(stdout, job->node);
1059 lastNode = job->node;
1061 (void)printf("*** [%s] Completed successfully\n",
1065 if (job->node != lastNode) {
1066 MESSAGE(stdout, job->node);
1067 lastNode = job->node;
1069 (void)printf("*** [%s] Signal %d\n",
1070 job->node->name, WTERMSIG(status));
1072 (void)fflush(stdout);
1077 meta_job_finish(job);
1081 return_job_token = FALSE;
1083 Trace_Log(JOBEND, job);
1084 if (!(job->flags & JOB_SPECIAL)) {
1085 if ((WAIT_STATUS(status) != 0) ||
1086 (aborting == ABORT_ERROR) ||
1087 (aborting == ABORT_INTERRUPT))
1088 return_job_token = TRUE;
1091 if ((aborting != ABORT_ERROR) && (aborting != ABORT_INTERRUPT) &&
1092 (WAIT_STATUS(status) == 0)) {
1094 * As long as we aren't aborting and the job didn't return a non-zero
1095 * status that we shouldn't ignore, we call Make_Update to update
1096 * the parents. In addition, any saved commands for the node are placed
1097 * on the .END target.
1099 if (job->tailCmds != NULL) {
1100 Lst_ForEachFrom(job->node->commands, job->tailCmds,
1104 job->node->made = MADE;
1105 if (!(job->flags & JOB_SPECIAL))
1106 return_job_token = TRUE;
1107 Make_Update(job->node);
1108 job->job_state = JOB_ST_FREE;
1109 } else if (WAIT_STATUS(status)) {
1111 job->job_state = JOB_ST_FREE;
1115 * Set aborting if any error.
1117 if (errors && !keepgoing && (aborting != ABORT_INTERRUPT)) {
1119 * If we found any errors in this batch of children and the -k flag
1120 * wasn't given, we set the aborting flag so no more jobs get
1123 aborting = ABORT_ERROR;
1126 if (return_job_token)
1129 if (aborting == ABORT_ERROR && jobTokensRunning == 0) {
1131 * If we are aborting and the job table is now empty, we finish.
1138 *-----------------------------------------------------------------------
1140 * Touch the given target. Called by JobStart when the -t flag was
1144 * gn the node of the file to touch
1145 * silent TRUE if should not print message
1151 * The data modification of the file is changed. In addition, if the
1152 * file did not exist, it is created.
1153 *-----------------------------------------------------------------------
1156 Job_Touch(GNode *gn, Boolean silent)
1158 int streamID; /* ID of stream opened to do the touch */
1159 struct utimbuf times; /* Times for utime() call */
1161 if (gn->type & (OP_JOIN|OP_USE|OP_USEBEFORE|OP_EXEC|OP_OPTIONAL|
1162 OP_SPECIAL|OP_PHONY)) {
1164 * .JOIN, .USE, .ZEROTIME and .OPTIONAL targets are "virtual" targets
1165 * and, as such, shouldn't really be created.
1170 if (!silent || NoExecute(gn)) {
1171 (void)fprintf(stdout, "touch %s\n", gn->name);
1172 (void)fflush(stdout);
1175 if (NoExecute(gn)) {
1179 if (gn->type & OP_ARCHV) {
1181 } else if (gn->type & OP_LIB) {
1184 char *file = gn->path ? gn->path : gn->name;
1186 times.actime = times.modtime = now;
1187 if (utime(file, ×) < 0){
1188 streamID = open(file, O_RDWR | O_CREAT, 0666);
1190 if (streamID >= 0) {
1194 * Read and write a byte to the file to change the
1195 * modification time, then close the file.
1197 if (read(streamID, &c, 1) == 1) {
1198 (void)lseek(streamID, (off_t)0, SEEK_SET);
1199 while (write(streamID, &c, 1) == -1 && errno == EAGAIN)
1203 (void)close(streamID);
1205 (void)fprintf(stdout, "*** couldn't touch %s: %s",
1206 file, strerror(errno));
1207 (void)fflush(stdout);
1214 *-----------------------------------------------------------------------
1215 * Job_CheckCommands --
1216 * Make sure the given node has all the commands it needs.
1219 * gn The target whose commands need verifying
1220 * abortProc Function to abort with message
1223 * TRUE if the commands list is/was ok.
1226 * The node will have commands from the .DEFAULT rule added to it
1228 *-----------------------------------------------------------------------
1231 Job_CheckCommands(GNode *gn, void (*abortProc)(const char *, ...))
1233 if (OP_NOP(gn->type) && Lst_IsEmpty(gn->commands) &&
1234 ((gn->type & OP_LIB) == 0 || Lst_IsEmpty(gn->children))) {
1236 * No commands. Look for .DEFAULT rule from which we might infer
1239 if ((DEFAULT != NULL) && !Lst_IsEmpty(DEFAULT->commands) &&
1240 (gn->type & OP_SPECIAL) == 0) {
1243 * Make only looks for a .DEFAULT if the node was never the
1244 * target of an operator, so that's what we do too. If
1245 * a .DEFAULT was given, we substitute its commands for gn's
1246 * commands and set the IMPSRC variable to be the target's name
1247 * The DEFAULT node acts like a transformation rule, in that
1248 * gn also inherits any attributes or sources attached to
1251 Make_HandleUse(DEFAULT, gn);
1252 Var_Set(IMPSRC, Var_Value(TARGET, gn, &p1), gn, 0);
1255 } else if (Dir_MTime(gn, 0) == 0 && (gn->type & OP_SPECIAL) == 0) {
1257 * The node wasn't the target of an operator we have no .DEFAULT
1258 * rule to go on and the target doesn't already exist. There's
1259 * nothing more we can do for this branch. If the -k flag wasn't
1260 * given, we stop in our tracks, otherwise we just don't update
1261 * this node's parents so they never get examined.
1263 static const char msg[] = ": don't know how to make";
1265 if (gn->flags & FROM_DEPEND) {
1266 if (!Job_RunTarget(".STALE", gn->fname))
1267 fprintf(stdout, "%s: %s, %d: ignoring stale %s for %s\n",
1268 progname, gn->fname, gn->lineno, makeDependfile,
1273 if (gn->type & OP_OPTIONAL) {
1274 (void)fprintf(stdout, "%s%s %s (ignored)\n", progname,
1276 (void)fflush(stdout);
1277 } else if (keepgoing) {
1278 (void)fprintf(stdout, "%s%s %s (continuing)\n", progname,
1280 (void)fflush(stdout);
1283 (*abortProc)("%s%s %s. Stop", progname, msg, gn->name);
1292 *-----------------------------------------------------------------------
1294 * Execute the shell for the given job. Called from JobStart
1297 * job Job to execute
1303 * A shell is executed, outputs is altered and the Job structure added
1306 *-----------------------------------------------------------------------
1309 JobExec(Job *job, char **argv)
1311 int cpid; /* ID of new child */
1314 job->flags &= ~JOB_TRACED;
1319 (void)fprintf(debug_file, "Running %s %sly\n", job->node->name, "local");
1320 (void)fprintf(debug_file, "\tCommand: ");
1321 for (i = 0; argv[i] != NULL; i++) {
1322 (void)fprintf(debug_file, "%s ", argv[i]);
1324 (void)fprintf(debug_file, "\n");
1328 * Some jobs produce no output and it's disconcerting to have
1329 * no feedback of their running (since they produce no output, the
1330 * banner with their name in it never appears). This is an attempt to
1331 * provide that feedback, even if nothing follows it.
1333 if ((lastNode != job->node) && !(job->flags & JOB_SILENT)) {
1334 MESSAGE(stdout, job->node);
1335 lastNode = job->node;
1338 /* No interruptions until this job is on the `jobs' list */
1341 /* Pre-emptively mark job running, pid still zero though */
1342 job->job_state = JOB_ST_RUNNING;
1346 Punt("Cannot vfork: %s", strerror(errno));
1354 meta_job_child(job);
1358 * Reset all signal handlers; this is necessary because we also
1359 * need to unblock signals before we exec(2).
1363 /* Now unblock signals */
1364 sigemptyset(&tmask);
1365 JobSigUnlock(&tmask);
1368 * Must duplicate the input stream down to the child's input and
1369 * reset it to the beginning (again). Since the stream was marked
1370 * close-on-exec, we must clear that bit in the new input.
1372 if (dup2(FILENO(job->cmdFILE), 0) == -1) {
1373 execError("dup2", "job->cmdFILE");
1376 (void)fcntl(0, F_SETFD, 0);
1377 (void)lseek(0, (off_t)0, SEEK_SET);
1379 if (Always_pass_job_queue || (job->node->type & OP_MAKE)) {
1381 * Pass job token pipe to submakes.
1383 fcntl(tokenWaitJob.inPipe, F_SETFD, 0);
1384 fcntl(tokenWaitJob.outPipe, F_SETFD, 0);
1388 * Set up the child's output to be routed through the pipe
1389 * we've created for it.
1391 if (dup2(job->outPipe, 1) == -1) {
1392 execError("dup2", "job->outPipe");
1396 * The output channels are marked close on exec. This bit was
1397 * duplicated by the dup2(on some systems), so we have to clear
1398 * it before routing the shell's error output to the same place as
1399 * its standard output.
1401 (void)fcntl(1, F_SETFD, 0);
1402 if (dup2(1, 2) == -1) {
1403 execError("dup2", "1, 2");
1408 * We want to switch the child into a different process family so
1409 * we can kill it and all its descendants in one fell swoop,
1410 * by killing its process family, but not commit suicide.
1412 #if defined(HAVE_SETPGID)
1413 (void)setpgid(0, getpid());
1415 #if defined(HAVE_SETSID)
1416 /* XXX: dsl - I'm sure this should be setpgrp()... */
1419 (void)setpgrp(0, getpid());
1425 (void)execv(shellPath, argv);
1426 execError("exec", shellPath);
1430 /* Parent, continuing after the child exec */
1433 Trace_Log(JOBSTART, job);
1436 * Set the current position in the buffer to the beginning
1437 * and mark another stream to watch in the outputs mask
1443 if (job->cmdFILE != NULL && job->cmdFILE != stdout) {
1444 (void)fclose(job->cmdFILE);
1445 job->cmdFILE = NULL;
1449 * Now the job is actually running, add it to the table.
1452 fprintf(debug_file, "JobExec(%s): pid %d added to jobs table\n",
1453 job->node->name, job->pid);
1454 job_table_dump("job started");
1456 JobSigUnlock(&mask);
1460 *-----------------------------------------------------------------------
1462 * Create the argv needed to execute the shell for a given job.
1469 *-----------------------------------------------------------------------
1472 JobMakeArgv(Job *job, char **argv)
1475 static char args[10]; /* For merged arguments */
1477 argv[0] = UNCONST(shellName);
1480 if ((commandShell->exit && (*commandShell->exit != '-')) ||
1481 (commandShell->echo && (*commandShell->echo != '-')))
1484 * At least one of the flags doesn't have a minus before it, so
1485 * merge them together. Have to do this because the *(&(@*#*&#$#
1486 * Bourne shell thinks its second argument is a file to source.
1487 * Grrrr. Note the ten-character limitation on the combined arguments.
1489 (void)snprintf(args, sizeof(args), "-%s%s",
1490 ((job->flags & JOB_IGNERR) ? "" :
1491 (commandShell->exit ? commandShell->exit : "")),
1492 ((job->flags & JOB_SILENT) ? "" :
1493 (commandShell->echo ? commandShell->echo : "")));
1500 if (!(job->flags & JOB_IGNERR) && commandShell->exit) {
1501 argv[argc] = UNCONST(commandShell->exit);
1504 if (!(job->flags & JOB_SILENT) && commandShell->echo) {
1505 argv[argc] = UNCONST(commandShell->echo);
1513 *-----------------------------------------------------------------------
1515 * Start a target-creation process going for the target described
1516 * by the graph node gn.
1519 * gn target to create
1520 * flags flags for the job to override normal ones.
1521 * e.g. JOB_SPECIAL or JOB_IGNDOTS
1522 * previous The previous Job structure for this node, if any.
1525 * JOB_ERROR if there was an error in the commands, JOB_FINISHED
1526 * if there isn't actually anything left to do for the job and
1527 * JOB_RUNNING if the job has been started.
1530 * A new Job node is created and added to the list of running
1531 * jobs. PMake is forked and a child shell created.
1533 * NB: I'm fairly sure that this code is never called with JOB_SPECIAL set
1534 * JOB_IGNDOTS is never set (dsl)
1535 * Also the return value is ignored by everyone.
1536 *-----------------------------------------------------------------------
1539 JobStart(GNode *gn, int flags)
1541 Job *job; /* new job descriptor */
1542 char *argv[10]; /* Argument vector to shell */
1543 Boolean cmdsOK; /* true if the nodes commands were all right */
1544 Boolean noExec; /* Set true if we decide not to run the job */
1545 int tfd; /* File descriptor to the temp file */
1547 for (job = job_table; job < job_table_end; job++) {
1548 if (job->job_state == JOB_ST_FREE)
1551 if (job >= job_table_end)
1552 Punt("JobStart no job slots vacant");
1554 memset(job, 0, sizeof *job);
1555 job->job_state = JOB_ST_SETUP;
1556 if (gn->type & OP_SPECIAL)
1557 flags |= JOB_SPECIAL;
1560 job->tailCmds = NULL;
1563 * Set the initial value of the flags for this job based on the global
1564 * ones and the node's attributes... Any flags supplied by the caller
1565 * are also added to the field.
1568 if (Targ_Ignore(gn)) {
1569 job->flags |= JOB_IGNERR;
1571 if (Targ_Silent(gn)) {
1572 job->flags |= JOB_SILENT;
1574 job->flags |= flags;
1577 * Check the commands now so any attributes from .DEFAULT have a chance
1578 * to migrate to the node
1580 cmdsOK = Job_CheckCommands(gn, Error);
1582 job->inPollfd = NULL;
1584 * If the -n flag wasn't given, we open up OUR (not the child's)
1585 * temporary file to stuff commands in it. The thing is rd/wr so we don't
1586 * need to reopen it to feed it to the shell. If the -n flag *was* given,
1587 * we just set the file to be stdout. Cute, huh?
1589 if (((gn->type & OP_MAKE) && !(noRecursiveExecute)) ||
1590 (!noExecute && !touchFlag)) {
1592 * tfile is the name of a file into which all shell commands are
1593 * put. It is removed before the child shell is executed, unless
1594 * DEBUG(SCRIPT) is set.
1599 * We're serious here, but if the commands were bogus, we're
1603 PrintOnError(gn, NULL); /* provide some clue */
1608 tfd = mkTempFile(TMPPAT, &tfile);
1610 (void)eunlink(tfile);
1611 JobSigUnlock(&mask);
1613 job->cmdFILE = fdopen(tfd, "w+");
1614 if (job->cmdFILE == NULL) {
1615 Punt("Could not fdopen %s", tfile);
1617 (void)fcntl(FILENO(job->cmdFILE), F_SETFD, 1);
1619 * Send the commands to the command file, flush all its buffers then
1620 * rewind and remove the thing.
1626 meta_job_start(job, gn);
1627 if (Targ_Silent(gn)) { /* might have changed */
1628 job->flags |= JOB_SILENT;
1633 * We can do all the commands at once. hooray for sanity
1636 Lst_ForEach(gn->commands, JobPrintCommand, job);
1639 * If we didn't print out any commands to the shell script,
1640 * there's not much point in executing the shell, is there?
1642 if (numCommands == 0) {
1647 } else if (NoExecute(gn)) {
1649 * Not executing anything -- just print all the commands to stdout
1650 * in one fell swoop. This will still set up job->tailCmds correctly.
1652 if (lastNode != gn) {
1653 MESSAGE(stdout, gn);
1656 job->cmdFILE = stdout;
1658 * Only print the commands if they're ok, but don't die if they're
1659 * not -- just let the user know they're bad and keep going. It
1660 * doesn't do any harm in this case and may do some good.
1663 Lst_ForEach(gn->commands, JobPrintCommand, job);
1666 * Don't execute the shell, thank you.
1671 * Just touch the target and note that no shell should be executed.
1672 * Set cmdFILE to stdout to make life easier. Check the commands, too,
1673 * but don't die if they're no good -- it does no harm to keep working
1676 job->cmdFILE = stdout;
1677 Job_Touch(gn, job->flags&JOB_SILENT);
1680 /* Just in case it isn't already... */
1681 (void)fflush(job->cmdFILE);
1684 * If we're not supposed to execute a shell, don't.
1687 if (!(job->flags & JOB_SPECIAL))
1690 * Unlink and close the command file if we opened one
1692 if (job->cmdFILE != stdout) {
1693 if (job->cmdFILE != NULL) {
1694 (void)fclose(job->cmdFILE);
1695 job->cmdFILE = NULL;
1700 * We only want to work our way up the graph if we aren't here because
1701 * the commands for the job were no good.
1703 if (cmdsOK && aborting == 0) {
1704 if (job->tailCmds != NULL) {
1705 Lst_ForEachFrom(job->node->commands, job->tailCmds,
1709 job->node->made = MADE;
1710 Make_Update(job->node);
1712 job->job_state = JOB_ST_FREE;
1713 return cmdsOK ? JOB_FINISHED : JOB_ERROR;
1717 * Set up the control arguments to the shell. This is based on the flags
1718 * set earlier for this job.
1720 JobMakeArgv(job, argv);
1722 /* Create the pipe by which we'll get the shell's output. */
1723 JobCreatePipe(job, 3);
1726 return(JOB_RUNNING);
1730 JobOutput(Job *job, char *cp, char *endp, int msg)
1734 if (commandShell->noPrint) {
1735 ecp = Str_FindSubstring(cp, commandShell->noPrint);
1736 while (ecp != NULL) {
1739 if (!beSilent && msg && job->node != lastNode) {
1740 MESSAGE(stdout, job->node);
1741 lastNode = job->node;
1744 * The only way there wouldn't be a newline after
1745 * this line is if it were the last in the buffer.
1746 * however, since the non-printable comes after it,
1747 * there must be a newline, so we don't print one.
1749 (void)fprintf(stdout, "%s", cp);
1750 (void)fflush(stdout);
1752 cp = ecp + commandShell->noPLen;
1755 * Still more to print, look again after skipping
1756 * the whitespace following the non-printable
1760 while (*cp == ' ' || *cp == '\t' || *cp == '\n') {
1763 ecp = Str_FindSubstring(cp, commandShell->noPrint);
1773 *-----------------------------------------------------------------------
1775 * This function is called at different times depending on
1776 * whether the user has specified that output is to be collected
1777 * via pipes or temporary files. In the former case, we are called
1778 * whenever there is something to read on the pipe. We collect more
1779 * output from the given job and store it in the job's outBuf. If
1780 * this makes up a line, we print it tagged by the job's identifier,
1782 * If output has been collected in a temporary file, we open the
1783 * file and read it line by line, transfering it to our own
1784 * output channel until the file is empty. At which point we
1785 * remove the temporary file.
1786 * In both cases, however, we keep our figurative eye out for the
1787 * 'noPrint' line for the shell from which the output came. If
1788 * we recognize a line, we don't print it. If the command is not
1789 * alone on the line (the character after it is not \0 or \n), we
1790 * do print whatever follows it.
1793 * job the job whose output needs printing
1794 * finish TRUE if this is the last time we'll be called
1801 * curPos may be shifted as may the contents of outBuf.
1802 *-----------------------------------------------------------------------
1805 JobDoOutput(Job *job, Boolean finish)
1807 Boolean gotNL = FALSE; /* true if got a newline */
1808 Boolean fbuf; /* true if our buffer filled up */
1809 int nr; /* number of bytes read */
1810 int i; /* auxiliary index into outBuf */
1811 int max; /* limit for i (end of current data) */
1812 int nRead; /* (Temporary) number of bytes read */
1815 * Read as many bytes as will fit in the buffer.
1821 nRead = read(job->inPipe, &job->outBuf[job->curPos],
1822 JOB_BUFSIZE - job->curPos);
1824 if (errno == EAGAIN)
1827 perror("JobDoOutput(piperead)");
1835 * If we hit the end-of-file (the job is dead), we must flush its
1836 * remaining output, so pretend we read a newline if there's any
1837 * output remaining in the buffer.
1838 * Also clear the 'finish' flag so we stop looping.
1840 if ((nr == 0) && (job->curPos != 0)) {
1841 job->outBuf[job->curPos] = '\n';
1844 } else if (nr == 0) {
1849 * Look for the last newline in the bytes we just got. If there is
1850 * one, break out of the loop with 'i' as its index and gotNL set
1853 max = job->curPos + nr;
1854 for (i = job->curPos + nr - 1; i >= job->curPos; i--) {
1855 if (job->outBuf[i] == '\n') {
1858 } else if (job->outBuf[i] == '\0') {
1862 job->outBuf[i] = ' ';
1868 if (job->curPos == JOB_BUFSIZE) {
1870 * If we've run out of buffer space, we have no choice
1871 * but to print the stuff. sigh.
1877 if (gotNL || fbuf) {
1879 * Need to send the output to the screen. Null terminate it
1880 * first, overwriting the newline character if there was one.
1881 * So long as the line isn't one we should filter (according
1882 * to the shell description), we print the line, preceded
1883 * by a target banner if this target isn't the same as the
1884 * one for which we last printed something.
1885 * The rest of the data in the buffer are then shifted down
1886 * to the start of the buffer and curPos is set accordingly.
1888 job->outBuf[i] = '\0';
1889 if (i >= job->curPos) {
1892 cp = JobOutput(job, job->outBuf, &job->outBuf[i], FALSE);
1895 * There's still more in that thar buffer. This time, though,
1896 * we know there's no newline at the end, so we add one of
1897 * our own free will.
1900 if (!beSilent && job->node != lastNode) {
1901 MESSAGE(stdout, job->node);
1902 lastNode = job->node;
1906 meta_job_output(job, cp, gotNL ? "\n" : "");
1909 (void)fprintf(stdout, "%s%s", cp, gotNL ? "\n" : "");
1910 (void)fflush(stdout);
1914 /* shift the remaining characters down */
1915 (void)memcpy(job->outBuf, &job->outBuf[i + 1], max - (i + 1));
1916 job->curPos = max - (i + 1);
1920 * We have written everything out, so we just start over
1921 * from the start of the buffer. No copying. No nothing.
1928 * If the finish flag is true, we must loop until we hit
1929 * end-of-file on the pipe. This is guaranteed to happen
1930 * eventually since the other end of the pipe is now closed
1931 * (we closed it explicitly and the child has exited). When
1932 * we do get an EOF, finish will be set FALSE and we'll fall
1944 * Unfortunately it is too complicated to run .BEGIN, .END,
1945 * and .INTERRUPT job in the parallel job module. This has
1946 * the nice side effect that it avoids a lot of other problems.
1948 Lst lst = Lst_Init(FALSE);
1949 Lst_AtEnd(lst, targ);
1950 (void)Make_Run(lst);
1951 Lst_Destroy(lst, NULL);
1952 JobStart(targ, JOB_SPECIAL);
1953 while (jobTokensRunning) {
1957 Compat_Make(targ, targ);
1958 if (targ->made == ERROR) {
1959 PrintOnError(targ, "\n\nStop.");
1966 *-----------------------------------------------------------------------
1967 * Job_CatchChildren --
1968 * Handle the exit of a child. Called from Make_Make.
1971 * block TRUE if should block on the wait
1977 * The job descriptor is removed from the list of children.
1980 * We do waits, blocking or not, according to the wisdom of our
1981 * caller, until there are no more children to report. For each
1982 * job, call JobFinish to finish things off.
1984 *-----------------------------------------------------------------------
1988 Job_CatchChildren(void)
1990 int pid; /* pid of dead child */
1991 WAIT_T status; /* Exit/termination status */
1994 * Don't even bother if we know there's no one around.
1996 if (jobTokensRunning == 0)
1999 while ((pid = waitpid((pid_t) -1, &status, WNOHANG | WUNTRACED)) > 0) {
2001 (void)fprintf(debug_file, "Process %d exited/stopped status %x.\n", pid,
2002 WAIT_STATUS(status));
2004 JobReapChild(pid, status, TRUE);
2009 * It is possible that wait[pid]() was called from elsewhere,
2010 * this lets us reap jobs regardless.
2013 JobReapChild(pid_t pid, WAIT_T status, Boolean isJobs)
2015 Job *job; /* job descriptor for dead child */
2018 * Don't even bother if we know there's no one around.
2020 if (jobTokensRunning == 0)
2023 job = JobFindPid(pid, JOB_ST_RUNNING, isJobs);
2026 if (!lurking_children)
2027 Error("Child (%d) status %x not in table?", pid, status);
2029 return; /* not ours */
2031 if (WIFSTOPPED(status)) {
2033 (void)fprintf(debug_file, "Process %d (%s) stopped.\n",
2034 job->pid, job->node->name);
2036 if (!make_suspended) {
2037 switch (WSTOPSIG(status)) {
2039 (void)printf("*** [%s] Suspended\n", job->node->name);
2042 (void)printf("*** [%s] Stopped\n", job->node->name);
2045 (void)printf("*** [%s] Stopped -- signal %d\n",
2046 job->node->name, WSTOPSIG(status));
2048 job->job_suspended = 1;
2050 (void)fflush(stdout);
2054 job->job_state = JOB_ST_FINISHED;
2055 job->exit_status = WAIT_STATUS(status);
2057 JobFinish(job, status);
2061 *-----------------------------------------------------------------------
2062 * Job_CatchOutput --
2063 * Catch the output from our children, if we're using
2064 * pipes do so. Otherwise just block time until we get a
2065 * signal(most likely a SIGCHLD) since there's no point in
2066 * just spinning when there's nothing to do and the reaping
2067 * of a child can wait for a while.
2073 * Output is read from pipes if we're piping.
2074 * -----------------------------------------------------------------------
2077 Job_CatchOutput(void)
2083 (void)fflush(stdout);
2085 /* The first fd in the list is the job token pipe */
2087 nready = poll(fds + 1 - wantToken, nfds - 1 + wantToken, POLL_MSEC);
2088 } while (nready < 0 && errno == EINTR);
2091 Punt("poll: %s", strerror(errno));
2093 if (nready > 0 && readyfd(&childExitJob)) {
2096 count = read(childExitJob.inPipe, &token, 1);
2099 Punt("unexpected eof on token pipe");
2101 Punt("token pipe read: %s", strerror(errno));
2103 if (token == DO_JOB_RESUME[0])
2104 /* Complete relay requested from our SIGCONT handler */
2113 Job_CatchChildren();
2117 for (i = 2; i < nfds; i++) {
2118 if (!fds[i].revents)
2121 if (job->job_state == JOB_ST_RUNNING)
2122 JobDoOutput(job, FALSE);
2129 *-----------------------------------------------------------------------
2131 * Start the creation of a target. Basically a front-end for
2132 * JobStart used by the Make module.
2138 * Another job is started.
2140 *-----------------------------------------------------------------------
2145 (void)JobStart(gn, 0);
2151 if (shellPath == NULL) {
2153 * We are using the default shell, which may be an absolute
2154 * path if DEFSHELL_CUSTOM is defined.
2156 shellName = commandShell->name;
2157 #ifdef DEFSHELL_CUSTOM
2158 if (*shellName == '/') {
2159 shellPath = shellName;
2160 shellName = strrchr(shellPath, '/');
2164 shellPath = str_concat(_PATH_DEFSHELLDIR, shellName, STR_ADDSLASH);
2166 if (commandShell->exit == NULL) {
2167 commandShell->exit = "";
2169 if (commandShell->echo == NULL) {
2170 commandShell->echo = "";
2172 if (commandShell->hasErrCtl && *commandShell->exit) {
2174 strcmp(commandShell->exit, &shellErrFlag[1]) != 0) {
2176 shellErrFlag = NULL;
2178 if (!shellErrFlag) {
2179 int n = strlen(commandShell->exit) + 2;
2181 shellErrFlag = bmake_malloc(n);
2183 snprintf(shellErrFlag, n, "-%s", commandShell->exit);
2186 } else if (shellErrFlag) {
2188 shellErrFlag = NULL;
2193 * Returns the string literal that is used in the current command shell
2194 * to produce a newline character.
2197 Shell_GetNewline(void)
2200 return commandShell->newline;
2209 } else if (!Var_Exists(MAKE_JOB_PREFIX, VAR_GLOBAL)) {
2210 Var_Set(MAKE_JOB_PREFIX, "---", VAR_GLOBAL, 0);
2213 targPrefix = Var_Subst(NULL, "${" MAKE_JOB_PREFIX "}", VAR_GLOBAL, 0);
2217 *-----------------------------------------------------------------------
2219 * Initialize the process module
2227 * lists and counters are initialized
2228 *-----------------------------------------------------------------------
2234 /* Allocate space for all the job info */
2235 job_table = bmake_malloc(maxJobs * sizeof *job_table);
2236 memset(job_table, 0, maxJobs * sizeof *job_table);
2237 job_table_end = job_table + maxJobs;
2245 Always_pass_job_queue = getBoolean(MAKE_ALWAYS_PASS_JOB_QUEUE,
2246 Always_pass_job_queue);
2248 Job_error_token = getBoolean(MAKE_JOB_ERROR_TOKEN, Job_error_token);
2252 * There is a non-zero chance that we already have children.
2253 * eg after 'make -f- <<EOF'
2254 * Since their termination causes a 'Child (pid) not in table' message,
2255 * Collect the status of any that are already dead, and suppress the
2256 * error message if there are any undead ones.
2260 rval = waitpid((pid_t) -1, &status, WNOHANG);
2264 lurking_children = 1;
2270 JobCreatePipe(&childExitJob, 3);
2272 /* We can only need to wait for tokens, children and output from each job */
2273 fds = bmake_malloc(sizeof (*fds) * (2 + maxJobs));
2274 jobfds = bmake_malloc(sizeof (*jobfds) * (2 + maxJobs));
2276 /* These are permanent entries and take slots 0 and 1 */
2277 watchfd(&tokenWaitJob);
2278 watchfd(&childExitJob);
2280 sigemptyset(&caught_signals);
2282 * Install a SIGCHLD handler.
2284 (void)bmake_signal(SIGCHLD, JobChildSig);
2285 sigaddset(&caught_signals, SIGCHLD);
2287 #define ADDSIG(s,h) \
2288 if (bmake_signal(s, SIG_IGN) != SIG_IGN) { \
2289 sigaddset(&caught_signals, s); \
2290 (void)bmake_signal(s, h); \
2294 * Catch the four signals that POSIX specifies if they aren't ignored.
2295 * JobPassSig will take care of calling JobInterrupt if appropriate.
2297 ADDSIG(SIGINT, JobPassSig_int)
2298 ADDSIG(SIGHUP, JobPassSig_term)
2299 ADDSIG(SIGTERM, JobPassSig_term)
2300 ADDSIG(SIGQUIT, JobPassSig_term)
2303 * There are additional signals that need to be caught and passed if
2304 * either the export system wants to be told directly of signals or if
2305 * we're giving each job its own process group (since then it won't get
2306 * signals from the terminal driver as we own the terminal)
2308 ADDSIG(SIGTSTP, JobPassSig_suspend)
2309 ADDSIG(SIGTTOU, JobPassSig_suspend)
2310 ADDSIG(SIGTTIN, JobPassSig_suspend)
2311 ADDSIG(SIGWINCH, JobCondPassSig)
2312 ADDSIG(SIGCONT, JobContinueSig)
2315 (void)Job_RunTarget(".BEGIN", NULL);
2316 postCommands = Targ_FindNode(".END", TARG_CREATE);
2319 static void JobSigReset(void)
2322 if (sigismember(&caught_signals, s)) { \
2323 (void)bmake_signal(s, SIG_DFL); \
2336 (void)bmake_signal(SIGCHLD, SIG_DFL);
2340 *-----------------------------------------------------------------------
2342 * Find a shell in 'shells' given its name.
2345 * A pointer to the Shell structure.
2350 *-----------------------------------------------------------------------
2353 JobMatchShell(const char *name)
2357 for (sh = shells; sh->name != NULL; sh++) {
2358 if (strcmp(name, sh->name) == 0)
2365 *-----------------------------------------------------------------------
2367 * Parse a shell specification and set up commandShell, shellPath
2368 * and shellName appropriately.
2371 * line The shell spec
2374 * FAILURE if the specification was incorrect.
2377 * commandShell points to a Shell structure (either predefined or
2378 * created from the shell spec), shellPath is the full path of the
2379 * shell described by commandShell, while shellName is just the
2380 * final component of shellPath.
2383 * A shell specification consists of a .SHELL target, with dependency
2384 * operator, followed by a series of blank-separated words. Double
2385 * quotes can be used to use blanks in words. A backslash escapes
2386 * anything (most notably a double-quote and a space) and
2387 * provides the functionality it does in C. Each word consists of
2388 * keyword and value separated by an equal sign. There should be no
2389 * unnecessary spaces in the word. The keywords are as follows:
2390 * name Name of shell.
2391 * path Location of shell.
2392 * quiet Command to turn off echoing.
2393 * echo Command to turn echoing on
2394 * filter Result of turning off echoing that shouldn't be
2396 * echoFlag Flag to turn echoing on at the start
2397 * errFlag Flag to turn error checking on at the start
2398 * hasErrCtl True if shell has error checking control
2399 * newline String literal to represent a newline char
2400 * check Command to turn on error checking if hasErrCtl
2401 * is TRUE or template of command to echo a command
2402 * for which error checking is off if hasErrCtl is
2404 * ignore Command to turn off error checking if hasErrCtl
2405 * is TRUE or template of command to execute a
2406 * command so as to ignore any errors it returns if
2407 * hasErrCtl is FALSE.
2409 *-----------------------------------------------------------------------
2412 Job_ParseShell(char *line)
2419 Boolean fullSpec = FALSE;
2422 while (isspace((unsigned char)*line)) {
2427 free(UNCONST(shellArgv));
2429 memset(&newShell, 0, sizeof(newShell));
2432 * Parse the specification by keyword
2434 words = brk_string(line, &argc, TRUE, &path);
2435 if (words == NULL) {
2436 Error("Unterminated quoted string [%s]", line);
2441 for (path = NULL, argv = words; argc != 0; argc--, argv++) {
2442 if (strncmp(*argv, "path=", 5) == 0) {
2444 } else if (strncmp(*argv, "name=", 5) == 0) {
2445 newShell.name = &argv[0][5];
2447 if (strncmp(*argv, "quiet=", 6) == 0) {
2448 newShell.echoOff = &argv[0][6];
2449 } else if (strncmp(*argv, "echo=", 5) == 0) {
2450 newShell.echoOn = &argv[0][5];
2451 } else if (strncmp(*argv, "filter=", 7) == 0) {
2452 newShell.noPrint = &argv[0][7];
2453 newShell.noPLen = strlen(newShell.noPrint);
2454 } else if (strncmp(*argv, "echoFlag=", 9) == 0) {
2455 newShell.echo = &argv[0][9];
2456 } else if (strncmp(*argv, "errFlag=", 8) == 0) {
2457 newShell.exit = &argv[0][8];
2458 } else if (strncmp(*argv, "hasErrCtl=", 10) == 0) {
2459 char c = argv[0][10];
2460 newShell.hasErrCtl = !((c != 'Y') && (c != 'y') &&
2461 (c != 'T') && (c != 't'));
2462 } else if (strncmp(*argv, "newline=", 8) == 0) {
2463 newShell.newline = &argv[0][8];
2464 } else if (strncmp(*argv, "check=", 6) == 0) {
2465 newShell.errCheck = &argv[0][6];
2466 } else if (strncmp(*argv, "ignore=", 7) == 0) {
2467 newShell.ignErr = &argv[0][7];
2468 } else if (strncmp(*argv, "errout=", 7) == 0) {
2469 newShell.errOut = &argv[0][7];
2470 } else if (strncmp(*argv, "comment=", 8) == 0) {
2471 newShell.commentChar = argv[0][8];
2473 Parse_Error(PARSE_FATAL, "Unknown keyword \"%s\"",
2484 * If no path was given, the user wants one of the pre-defined shells,
2485 * yes? So we find the one s/he wants with the help of JobMatchShell
2486 * and set things up the right way. shellPath will be set up by
2489 if (newShell.name == NULL) {
2490 Parse_Error(PARSE_FATAL, "Neither path nor name specified");
2494 if ((sh = JobMatchShell(newShell.name)) == NULL) {
2495 Parse_Error(PARSE_WARNING, "%s: No matching shell",
2501 shellName = newShell.name;
2503 /* Shell_Init has already been called! Do it again. */
2504 free(UNCONST(shellPath));
2511 * The user provided a path. If s/he gave nothing else (fullSpec is
2512 * FALSE), try and find a matching shell in the ones we know of.
2513 * Else we just take the specification at its word and copy it
2514 * to a new location. In either case, we need to record the
2515 * path the user gave for the shell.
2518 path = strrchr(path, '/');
2520 path = UNCONST(shellPath);
2524 if (newShell.name != NULL) {
2525 shellName = newShell.name;
2530 if ((sh = JobMatchShell(shellName)) == NULL) {
2531 Parse_Error(PARSE_WARNING, "%s: No matching shell",
2538 commandShell = bmake_malloc(sizeof(Shell));
2539 *commandShell = newShell;
2541 /* this will take care of shellErrFlag */
2545 if (commandShell->echoOn && commandShell->echoOff) {
2546 commandShell->hasEchoCtl = TRUE;
2549 if (!commandShell->hasErrCtl) {
2550 if (commandShell->errCheck == NULL) {
2551 commandShell->errCheck = "";
2553 if (commandShell->ignErr == NULL) {
2554 commandShell->ignErr = "%s\n";
2559 * Do not free up the words themselves, since they might be in use by the
2560 * shell specification.
2567 *-----------------------------------------------------------------------
2569 * Handle the receipt of an interrupt.
2572 * runINTERRUPT Non-zero if commands for the .INTERRUPT target
2573 * should be executed
2574 * signo signal received
2580 * All children are killed. Another job will be started if the
2581 * .INTERRUPT target was given.
2582 *-----------------------------------------------------------------------
2585 JobInterrupt(int runINTERRUPT, int signo)
2587 Job *job; /* job descriptor in that element */
2588 GNode *interrupt; /* the node describing the .INTERRUPT target */
2592 aborting = ABORT_INTERRUPT;
2596 for (job = job_table; job < job_table_end; job++) {
2597 if (job->job_state != JOB_ST_RUNNING)
2602 if ((gn->type & (OP_JOIN|OP_PHONY)) == 0 && !Targ_Precious(gn)) {
2603 char *file = (gn->path == NULL ? gn->name : gn->path);
2604 if (!noExecute && eunlink(file) != -1) {
2605 Error("*** %s removed", file);
2610 (void)fprintf(debug_file,
2611 "JobInterrupt passing signal %d to child %d.\n",
2614 KILLPG(job->pid, signo);
2618 JobSigUnlock(&mask);
2620 if (runINTERRUPT && !touchFlag) {
2621 interrupt = Targ_FindNode(".INTERRUPT", TARG_NOCREATE);
2622 if (interrupt != NULL) {
2623 ignoreErrors = FALSE;
2627 Trace_Log(MAKEINTR, 0);
2632 *-----------------------------------------------------------------------
2634 * Do final processing such as the running of the commands
2635 * attached to the .END target.
2638 * Number of errors reported.
2642 *-----------------------------------------------------------------------
2647 if (postCommands != NULL &&
2648 (!Lst_IsEmpty(postCommands->commands) ||
2649 !Lst_IsEmpty(postCommands->children))) {
2651 Error("Errors reported so .END ignored");
2653 JobRun(postCommands);
2660 *-----------------------------------------------------------------------
2662 * Cleanup any memory used by the jobs module
2669 *-----------------------------------------------------------------------
2681 *-----------------------------------------------------------------------
2683 * Waits for all running jobs to finish and returns. Sets 'aborting'
2684 * to ABORT_WAIT to prevent other jobs from starting.
2690 * Currently running jobs finish.
2692 *-----------------------------------------------------------------------
2697 aborting = ABORT_WAIT;
2698 while (jobTokensRunning != 0) {
2705 *-----------------------------------------------------------------------
2707 * Abort all currently running jobs without handling output or anything.
2708 * This function is to be called only in the event of a major
2709 * error. Most definitely NOT to be called from JobInterrupt.
2715 * All children are killed, not just the firstborn
2716 *-----------------------------------------------------------------------
2721 Job *job; /* the job descriptor in that element */
2724 aborting = ABORT_ERROR;
2726 if (jobTokensRunning) {
2727 for (job = job_table; job < job_table_end; job++) {
2728 if (job->job_state != JOB_ST_RUNNING)
2731 * kill the child process with increasingly drastic signals to make
2732 * darn sure it's dead.
2734 KILLPG(job->pid, SIGINT);
2735 KILLPG(job->pid, SIGKILL);
2740 * Catch as many children as want to report in at first, then give up
2742 while (waitpid((pid_t) -1, &foo, WNOHANG) > 0)
2748 *-----------------------------------------------------------------------
2750 * Tries to restart stopped jobs if there are slots available.
2751 * Called in process context in response to a SIGCONT.
2759 *-----------------------------------------------------------------------
2762 JobRestartJobs(void)
2766 for (job = job_table; job < job_table_end; job++) {
2767 if (job->job_state == JOB_ST_RUNNING &&
2768 (make_suspended || job->job_suspended)) {
2770 (void)fprintf(debug_file, "Restarting stopped job pid %d.\n",
2773 if (job->job_suspended) {
2774 (void)printf("*** [%s] Continued\n", job->node->name);
2775 (void)fflush(stdout);
2777 job->job_suspended = 0;
2778 if (KILLPG(job->pid, SIGCONT) != 0 && DEBUG(JOB)) {
2779 fprintf(debug_file, "Failed to send SIGCONT to %d\n", job->pid);
2782 if (job->job_state == JOB_ST_FINISHED)
2783 /* Job exit deferred after calling waitpid() in a signal handler */
2784 JobFinish(job, job->exit_status);
2792 if (job->inPollfd != NULL)
2793 Punt("Watching watched job");
2795 fds[nfds].fd = job->inPipe;
2796 fds[nfds].events = POLLIN;
2798 job->inPollfd = &fds[nfds];
2806 if (job->inPollfd == NULL)
2807 Punt("Unwatching unwatched job");
2808 i = job->inPollfd - fds;
2811 * Move last job in table into hole made by dead job.
2815 jobfds[i] = jobfds[nfds];
2816 jobfds[i]->inPollfd = &fds[i];
2818 job->inPollfd = NULL;
2824 if (job->inPollfd == NULL)
2825 Punt("Polling unwatched job");
2826 return (job->inPollfd->revents & POLLIN) != 0;
2830 *-----------------------------------------------------------------------
2832 * Put a token into the job pipe so that some make process can start
2836 * Allows more build jobs to be spawned somewhere.
2838 *-----------------------------------------------------------------------
2844 char tok = JOB_TOKENS[aborting], tok1;
2846 if (!Job_error_token && aborting == ABORT_ERROR) {
2847 if (jobTokensRunning == 0)
2849 tok = '+'; /* no error token */
2852 /* If we are depositing an error token flush everything else */
2853 while (tok != '+' && read(tokenWaitJob.inPipe, &tok1, 1) == 1)
2857 fprintf(debug_file, "(%d) aborting %d, deposit token %c\n",
2858 getpid(), aborting, tok);
2859 while (write(tokenWaitJob.outPipe, &tok, 1) == -1 && errno == EAGAIN)
2864 *-----------------------------------------------------------------------
2865 * Job_ServerStartTokenAdd --
2866 * Prep the job token pipe in the root make process.
2868 *-----------------------------------------------------------------------
2872 Job_ServerStart(int max_tokens, int jp_0, int jp_1)
2877 if (jp_0 >= 0 && jp_1 >= 0) {
2878 /* Pipe passed in from parent */
2879 tokenWaitJob.inPipe = jp_0;
2880 tokenWaitJob.outPipe = jp_1;
2881 (void)fcntl(jp_0, F_SETFD, 1);
2882 (void)fcntl(jp_1, F_SETFD, 1);
2886 JobCreatePipe(&tokenWaitJob, 15);
2888 snprintf(jobarg, sizeof(jobarg), "%d,%d",
2889 tokenWaitJob.inPipe, tokenWaitJob.outPipe);
2891 Var_Append(MAKEFLAGS, "-J", VAR_GLOBAL);
2892 Var_Append(MAKEFLAGS, jobarg, VAR_GLOBAL);
2895 * Preload the job pipe with one token per job, save the one
2896 * "extra" token for the primary job.
2898 * XXX should clip maxJobs against PIPE_BUF -- if max_tokens is
2899 * larger than the write buffer size of the pipe, we will
2902 for (i = 1; i < max_tokens; i++)
2907 *-----------------------------------------------------------------------
2908 * Job_TokenReturn --
2909 * Return a withdrawn token to the pool.
2911 *-----------------------------------------------------------------------
2915 Job_TokenReturn(void)
2918 if (jobTokensRunning < 0)
2919 Punt("token botch");
2920 if (jobTokensRunning || JOB_TOKENS[aborting] != '+')
2925 *-----------------------------------------------------------------------
2926 * Job_TokenWithdraw --
2927 * Attempt to withdraw a token from the pool.
2930 * Returns TRUE if a token was withdrawn, and FALSE if the pool
2931 * is currently empty.
2934 * If pool is empty, set wantToken so that we wake up
2935 * when a token is released.
2937 *-----------------------------------------------------------------------
2942 Job_TokenWithdraw(void)
2949 fprintf(debug_file, "Job_TokenWithdraw(%d): aborting %d, running %d\n",
2950 getpid(), aborting, jobTokensRunning);
2952 if (aborting || (jobTokensRunning >= maxJobs))
2955 count = read(tokenWaitJob.inPipe, &tok, 1);
2957 Fatal("eof on job pipe!");
2958 if (count < 0 && jobTokensRunning != 0) {
2959 if (errno != EAGAIN) {
2960 Fatal("job pipe read: %s", strerror(errno));
2963 fprintf(debug_file, "(%d) blocked for token\n", getpid());
2968 if (count == 1 && tok != '+') {
2969 /* make being abvorted - remove any other job tokens */
2971 fprintf(debug_file, "(%d) aborted by token %c\n", getpid(), tok);
2972 while (read(tokenWaitJob.inPipe, &tok1, 1) == 1)
2974 /* And put the stopper back */
2975 while (write(tokenWaitJob.outPipe, &tok, 1) == -1 && errno == EAGAIN)
2977 Fatal("A failure has been detected in another branch of the parallel make");
2980 if (count == 1 && jobTokensRunning == 0)
2981 /* We didn't want the token really */
2982 while (write(tokenWaitJob.outPipe, &tok, 1) == -1 && errno == EAGAIN)
2987 fprintf(debug_file, "(%d) withdrew token\n", getpid());
2992 *-----------------------------------------------------------------------
2994 * Run the named target if found. If a filename is specified, then
2995 * set that to the sources.
3001 * exits if the target fails.
3003 *-----------------------------------------------------------------------
3006 Job_RunTarget(const char *target, const char *fname) {
3007 GNode *gn = Targ_FindNode(target, TARG_NOCREATE);
3013 Var_Set(ALLSRC, fname, gn, 0);
3016 if (gn->made == ERROR) {
3017 PrintOnError(gn, "\n\nStop.");
3025 emul_poll(struct pollfd *fd, int nfd, int timeout)
3028 int i, maxfd, nselect, npoll;
3029 struct timeval tv, *tvp;
3036 for (i = 0; i < nfd; i++) {
3039 if (fd[i].events & POLLIN)
3040 FD_SET(fd[i].fd, &rfds);
3042 if (fd[i].events & POLLOUT)
3043 FD_SET(fd[i].fd, &wfds);
3045 if (fd[i].fd > maxfd)
3049 if (maxfd >= FD_SETSIZE) {
3050 Punt("Ran out of fd_set slots; "
3051 "recompile with a larger FD_SETSIZE.");
3057 usecs = timeout * 1000;
3058 tv.tv_sec = usecs / 1000000;
3059 tv.tv_usec = usecs % 1000000;
3063 nselect = select(maxfd + 1, &rfds, &wfds, 0, tvp);
3069 for (i = 0; i < nfd; i++) {
3070 if (FD_ISSET(fd[i].fd, &rfds))
3071 fd[i].revents |= POLLIN;
3073 if (FD_ISSET(fd[i].fd, &wfds))
3074 fd[i].revents |= POLLOUT;
3082 #endif /* USE_SELECT */