1 /* $NetBSD: job.c,v 1.186 2016/02/18 18:29:14 christos 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 1.186 2016/02/18 18:29:14 christos Exp $";
75 #include <sys/cdefs.h>
78 static char sccsid[] = "@(#)job.c 8.2 (Berkeley) 3/19/94";
80 __RCSID("$NetBSD: job.c,v 1.186 2016/02/18 18:29:14 christos 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 const char *malloc_options="A";
395 job_table_dump(const char *where)
399 fprintf(debug_file, "job table @ %s\n", where);
400 for (job = job_table; job < job_table_end; job++) {
401 fprintf(debug_file, "job %d, status %d, flags %d, pid %d\n",
402 (int)(job - job_table), job->job_state, job->flags, job->pid);
407 * JobSigLock/JobSigUnlock
409 * Signal lock routines to get exclusive access. Currently used to
410 * protect `jobs' and `stoppedJobs' list manipulations.
412 static void JobSigLock(sigset_t *omaskp)
414 if (sigprocmask(SIG_BLOCK, &caught_signals, omaskp) != 0) {
415 Punt("JobSigLock: sigprocmask: %s", strerror(errno));
420 static void JobSigUnlock(sigset_t *omaskp)
422 (void)sigprocmask(SIG_SETMASK, omaskp, NULL);
426 JobCreatePipe(Job *job, int minfd)
430 if (pipe(job->jobPipe) == -1)
431 Punt("Cannot create pipe: %s", strerror(errno));
433 for (i = 0; i < 2; i++) {
434 /* Avoid using low numbered fds */
435 fd = fcntl(job->jobPipe[i], F_DUPFD, minfd);
437 close(job->jobPipe[i]);
438 job->jobPipe[i] = fd;
442 /* Set close-on-exec flag for both */
443 (void)fcntl(job->jobPipe[0], F_SETFD, FD_CLOEXEC);
444 (void)fcntl(job->jobPipe[1], F_SETFD, FD_CLOEXEC);
447 * We mark the input side of the pipe non-blocking; we poll(2) the
448 * pipe when we're waiting for a job token, but we might lose the
449 * race for the token when a new one becomes available, so the read
450 * from the pipe should not block.
452 fcntl(job->jobPipe[0], F_SETFL,
453 fcntl(job->jobPipe[0], F_GETFL, 0) | O_NONBLOCK);
457 *-----------------------------------------------------------------------
459 * Pass a signal to a job
462 * signop Signal to send it
465 * None, except the job may bite it.
467 *-----------------------------------------------------------------------
470 JobCondPassSig(int signo)
475 (void)fprintf(debug_file, "JobCondPassSig(%d) called.\n", signo);
478 for (job = job_table; job < job_table_end; job++) {
479 if (job->job_state != JOB_ST_RUNNING)
482 (void)fprintf(debug_file,
483 "JobCondPassSig passing signal %d to child %d.\n",
486 KILLPG(job->pid, signo);
491 *-----------------------------------------------------------------------
496 * signo The signal number we've received
502 * Sends a token on the child exit pipe to wake us up from
505 *-----------------------------------------------------------------------
508 JobChildSig(int signo MAKE_ATTR_UNUSED)
510 while (write(childExitJob.outPipe, CHILD_EXIT, 1) == -1 && errno == EAGAIN)
516 *-----------------------------------------------------------------------
518 * Resume all stopped jobs.
521 * signo The signal number we've received
527 * Jobs start running again.
529 *-----------------------------------------------------------------------
532 JobContinueSig(int signo MAKE_ATTR_UNUSED)
535 * Defer sending to SIGCONT to our stopped children until we return
536 * from the signal handler.
538 while (write(childExitJob.outPipe, DO_JOB_RESUME, 1) == -1 &&
544 *-----------------------------------------------------------------------
546 * Pass a signal on to all jobs, then resend to ourselves.
549 * signo The signal number we've received
555 * We die by the same signal.
557 *-----------------------------------------------------------------------
559 MAKE_ATTR_DEAD static void
560 JobPassSig_int(int signo)
562 /* Run .INTERRUPT target then exit */
563 JobInterrupt(TRUE, signo);
566 MAKE_ATTR_DEAD static void
567 JobPassSig_term(int signo)
569 /* Dont run .INTERRUPT target then exit */
570 JobInterrupt(FALSE, signo);
574 JobPassSig_suspend(int signo)
576 sigset_t nmask, omask;
577 struct sigaction act;
579 /* Suppress job started/continued messages */
582 /* Pass the signal onto every job */
583 JobCondPassSig(signo);
586 * Send ourselves the signal now we've given the message to everyone else.
587 * Note we block everything else possible while we're getting the signal.
588 * This ensures that all our jobs get continued when we wake up before
589 * we take any other signal.
592 sigdelset(&nmask, signo);
593 (void)sigprocmask(SIG_SETMASK, &nmask, &omask);
595 act.sa_handler = SIG_DFL;
596 sigemptyset(&act.sa_mask);
598 (void)sigaction(signo, &act, NULL);
601 (void)fprintf(debug_file,
602 "JobPassSig passing signal %d to self.\n", signo);
605 (void)kill(getpid(), signo);
608 * We've been continued.
610 * A whole host of signals continue to happen!
611 * SIGCHLD for any processes that actually suspended themselves.
612 * SIGCHLD for any processes that exited while we were alseep.
613 * The SIGCONT that actually caused us to wakeup.
615 * Since we defer passing the SIGCONT on to our children until
616 * the main processing loop, we can be sure that all the SIGCHLD
617 * events will have happened by then - and that the waitpid() will
618 * collect the child 'suspended' events.
619 * For correct sequencing we just need to ensure we process the
620 * waitpid() before passign on the SIGCONT.
622 * In any case nothing else is needed here.
625 /* Restore handler and signal mask */
626 act.sa_handler = JobPassSig_suspend;
627 (void)sigaction(signo, &act, NULL);
628 (void)sigprocmask(SIG_SETMASK, &omask, NULL);
632 *-----------------------------------------------------------------------
634 * Compare the pid of the job with the given pid and return 0 if they
635 * are equal. This function is called from Job_CatchChildren
636 * to find the job descriptor of the finished job.
640 * pid process id desired
643 * Job with matching pid
647 *-----------------------------------------------------------------------
650 JobFindPid(int pid, int status, Boolean isJobs)
654 for (job = job_table; job < job_table_end; job++) {
655 if ((job->job_state == status) && job->pid == pid)
658 if (DEBUG(JOB) && isJobs)
659 job_table_dump("no pid");
664 *-----------------------------------------------------------------------
666 * Put out another command for the given job. If the command starts
667 * with an @ or a - we process it specially. In the former case,
668 * so long as the -s and -n flags weren't given to make, we stick
669 * a shell-specific echoOff command in the script. In the latter,
670 * we ignore errors for the entire job, unless the shell has error
672 * If the command is just "..." we take all future commands for this
673 * job to be commands to be executed once the entire graph has been
674 * made and return non-zero to signal that the end of the commands
675 * was reached. These commands are later attached to the postCommands
676 * node and executed by Job_End when all things are done.
677 * This function is called from JobStart via Lst_ForEach.
680 * cmdp command string to print
681 * jobp job for which to print it
684 * Always 0, unless the command was "..."
687 * If the command begins with a '-' and the shell has no error control,
688 * the JOB_IGNERR flag is set in the job descriptor.
689 * If the command is "..." and we're not ignoring such things,
690 * tailCmds is set to the successor node of the cmd.
691 * numCommands is incremented if the command is actually printed.
692 *-----------------------------------------------------------------------
695 JobPrintCommand(void *cmdp, void *jobp)
697 Boolean noSpecials; /* true if we shouldn't worry about
698 * inserting special commands into
699 * the input stream. */
700 Boolean shutUp = FALSE; /* true if we put a no echo command
701 * into the command file */
702 Boolean errOff = FALSE; /* true if we turned error checking
703 * off before printing the command
704 * and need to turn it back on */
705 const char *cmdTemplate; /* Template to use when printing the
707 char *cmdStart; /* Start of expanded command */
708 char *escCmd = NULL; /* Command with quotes/backticks escaped */
709 char *cmd = (char *)cmdp;
710 Job *job = (Job *)jobp;
713 noSpecials = NoExecute(job->node);
715 if (strcmp(cmd, "...") == 0) {
716 job->node->type |= OP_SAVE_CMDS;
717 if ((job->flags & JOB_IGNDOTS) == 0) {
718 job->tailCmds = Lst_Succ(Lst_Member(job->node->commands,
725 #define DBPRINTF(fmt, arg) if (DEBUG(JOB)) { \
726 (void)fprintf(debug_file, fmt, arg); \
728 (void)fprintf(job->cmdFILE, fmt, arg); \
729 (void)fflush(job->cmdFILE);
733 cmdStart = cmd = Var_Subst(NULL, cmd, job->node, VARF_WANTRES);
735 cmdTemplate = "%s\n";
738 * Check for leading @' and -'s to control echoing and error checking.
740 while (*cmd == '@' || *cmd == '-' || (*cmd == '+')) {
743 shutUp = DEBUG(LOUD) ? FALSE : TRUE;
751 * We're not actually executing anything...
752 * but this one needs to be - use compat mode just for it.
754 CompatRunCommand(cmdp, job->node);
762 while (isspace((unsigned char) *cmd))
766 * If the shell doesn't have error control the alternate echo'ing will
767 * be done (to avoid showing additional error checking code)
768 * and this will need the characters '$ ` \ "' escaped
771 if (!commandShell->hasErrCtl) {
772 /* Worst that could happen is every char needs escaping. */
773 escCmd = bmake_malloc((strlen(cmd) * 2) + 1);
774 for (i = 0, j= 0; cmd[i] != '\0'; i++, j++) {
775 if (cmd[i] == '$' || cmd[i] == '`' || cmd[i] == '\\' ||
784 if (!(job->flags & JOB_SILENT) && !noSpecials &&
785 commandShell->hasEchoCtl) {
786 DBPRINTF("%s\n", commandShell->echoOff);
788 if (commandShell->hasErrCtl)
795 if (commandShell->hasErrCtl) {
797 * we don't want the error-control commands showing
798 * up either, so we turn off echoing while executing
799 * them. We could put another field in the shell
800 * structure to tell JobDoOutput to look for this
801 * string too, but why make it any more complex than
804 if (!(job->flags & JOB_SILENT) && !shutUp &&
805 commandShell->hasEchoCtl) {
806 DBPRINTF("%s\n", commandShell->echoOff);
807 DBPRINTF("%s\n", commandShell->ignErr);
808 DBPRINTF("%s\n", commandShell->echoOn);
810 DBPRINTF("%s\n", commandShell->ignErr);
812 } else if (commandShell->ignErr &&
813 (*commandShell->ignErr != '\0'))
816 * The shell has no error control, so we need to be
817 * weird to get it to ignore any errors from the command.
818 * If echoing is turned on, we turn it off and use the
819 * errCheck template to echo the command. Leave echoing
820 * off so the user doesn't see the weirdness we go through
821 * to ignore errors. Set cmdTemplate to use the weirdness
822 * instead of the simple "%s\n" template.
824 job->flags |= JOB_IGNERR;
825 if (!(job->flags & JOB_SILENT) && !shutUp) {
826 if (commandShell->hasEchoCtl) {
827 DBPRINTF("%s\n", commandShell->echoOff);
829 DBPRINTF(commandShell->errCheck, escCmd);
833 DBPRINTF(commandShell->errCheck, escCmd);
836 cmdTemplate = commandShell->ignErr;
838 * The error ignoration (hee hee) is already taken care
839 * of by the ignErr template, so pretend error checking
852 * If errors are being checked and the shell doesn't have error control
853 * but does supply an errOut template, then setup commands to run
857 if (!commandShell->hasErrCtl && commandShell->errOut &&
858 (*commandShell->errOut != '\0')) {
859 if (!(job->flags & JOB_SILENT) && !shutUp) {
860 if (commandShell->hasEchoCtl) {
861 DBPRINTF("%s\n", commandShell->echoOff);
863 DBPRINTF(commandShell->errCheck, escCmd);
866 /* If it's a comment line or blank, treat as an ignored error */
867 if ((escCmd[0] == commandShell->commentChar) ||
869 cmdTemplate = commandShell->ignErr;
871 cmdTemplate = commandShell->errOut;
876 if (DEBUG(SHELL) && strcmp(shellName, "sh") == 0 &&
877 (job->flags & JOB_TRACED) == 0) {
878 DBPRINTF("set -%s\n", "x");
879 job->flags |= JOB_TRACED;
882 DBPRINTF(cmdTemplate, cmd);
887 * If echoing is already off, there's no point in issuing the
888 * echoOff command. Otherwise we issue it and pretend it was on
889 * for the whole command...
891 if (!shutUp && !(job->flags & JOB_SILENT) && commandShell->hasEchoCtl){
892 DBPRINTF("%s\n", commandShell->echoOff);
895 DBPRINTF("%s\n", commandShell->errCheck);
897 if (shutUp && commandShell->hasEchoCtl) {
898 DBPRINTF("%s\n", commandShell->echoOn);
904 *-----------------------------------------------------------------------
906 * Save a command to be executed when everything else is done.
907 * Callback function for JobFinish...
913 * The command is tacked onto the end of postCommands's commands list.
915 *-----------------------------------------------------------------------
918 JobSaveCommand(void *cmd, void *gn)
920 cmd = Var_Subst(NULL, (char *)cmd, (GNode *)gn, VARF_WANTRES);
921 (void)Lst_AtEnd(postCommands->commands, cmd);
927 *-----------------------------------------------------------------------
929 * Called to close both input and output pipes when a job is finished.
935 * The file descriptors associated with the job are closed.
937 *-----------------------------------------------------------------------
943 (void)close(job->outPipe);
946 JobDoOutput(job, TRUE);
947 (void)close(job->inPipe);
952 *-----------------------------------------------------------------------
954 * Do final processing for the given job including updating
955 * parents and starting new jobs as available/necessary. Note
956 * that we pay no attention to the JOB_IGNERR flag here.
957 * This is because when we're called because of a noexecute flag
958 * or something, jstat.w_status is 0 and when called from
959 * Job_CatchChildren, the status is zeroed if it s/b ignored.
963 * status sub-why job went away
969 * Final commands for the job are placed on postCommands.
971 * If we got an error and are aborting (aborting == ABORT_ERROR) and
972 * the job list is now empty, we are done for the day.
973 * If we recognized an error (errors !=0), we set the aborting flag
974 * to ABORT_ERROR so no more jobs will be started.
975 *-----------------------------------------------------------------------
979 JobFinish (Job *job, WAIT_T status)
981 Boolean done, return_job_token;
984 fprintf(debug_file, "Jobfinish: %d [%s], status %d\n",
985 job->pid, job->node->name, status);
988 if ((WIFEXITED(status) &&
989 (((WEXITSTATUS(status) != 0) && !(job->flags & JOB_IGNERR)))) ||
993 * If it exited non-zero and either we're doing things our
994 * way or we're not ignoring errors, the job is finished.
995 * Similarly, if the shell died because of a signal
996 * the job is also finished. In these
997 * cases, finish out the job's output before printing the exit
1001 if (job->cmdFILE != NULL && job->cmdFILE != stdout) {
1002 (void)fclose(job->cmdFILE);
1003 job->cmdFILE = NULL;
1006 } else if (WIFEXITED(status)) {
1008 * Deal with ignored errors in -B mode. We need to print a message
1009 * telling of the ignored error as well as setting status.w_status
1010 * to 0 so the next command gets run. To do this, we set done to be
1011 * TRUE if in -B mode and the job exited non-zero.
1013 done = WEXITSTATUS(status) != 0;
1015 * Old comment said: "Note we don't
1016 * want to close down any of the streams until we know we're at the
1018 * But we do. Otherwise when are we going to print the rest of the
1024 * No need to close things down or anything.
1030 if (WIFEXITED(status)) {
1032 (void)fprintf(debug_file, "Process %d [%s] exited.\n",
1033 job->pid, job->node->name);
1035 if (WEXITSTATUS(status) != 0) {
1036 if (job->node != lastNode) {
1037 MESSAGE(stdout, job->node);
1038 lastNode = job->node;
1042 meta_job_error(job, job->node, job->flags, WEXITSTATUS(status));
1045 (void)printf("*** [%s] Error code %d%s\n",
1047 WEXITSTATUS(status),
1048 (job->flags & JOB_IGNERR) ? " (ignored)" : "");
1049 if (job->flags & JOB_IGNERR) {
1050 WAIT_STATUS(status) = 0;
1052 PrintOnError(job->node, NULL);
1054 } else if (DEBUG(JOB)) {
1055 if (job->node != lastNode) {
1056 MESSAGE(stdout, job->node);
1057 lastNode = job->node;
1059 (void)printf("*** [%s] Completed successfully\n",
1063 if (job->node != lastNode) {
1064 MESSAGE(stdout, job->node);
1065 lastNode = job->node;
1067 (void)printf("*** [%s] Signal %d\n",
1068 job->node->name, WTERMSIG(status));
1070 (void)fflush(stdout);
1075 meta_job_finish(job);
1079 return_job_token = FALSE;
1081 Trace_Log(JOBEND, job);
1082 if (!(job->flags & JOB_SPECIAL)) {
1083 if ((WAIT_STATUS(status) != 0) ||
1084 (aborting == ABORT_ERROR) ||
1085 (aborting == ABORT_INTERRUPT))
1086 return_job_token = TRUE;
1089 if ((aborting != ABORT_ERROR) && (aborting != ABORT_INTERRUPT) &&
1090 (WAIT_STATUS(status) == 0)) {
1092 * As long as we aren't aborting and the job didn't return a non-zero
1093 * status that we shouldn't ignore, we call Make_Update to update
1094 * the parents. In addition, any saved commands for the node are placed
1095 * on the .END target.
1097 if (job->tailCmds != NULL) {
1098 Lst_ForEachFrom(job->node->commands, job->tailCmds,
1102 job->node->made = MADE;
1103 if (!(job->flags & JOB_SPECIAL))
1104 return_job_token = TRUE;
1105 Make_Update(job->node);
1106 job->job_state = JOB_ST_FREE;
1107 } else if (WAIT_STATUS(status)) {
1109 job->job_state = JOB_ST_FREE;
1113 * Set aborting if any error.
1115 if (errors && !keepgoing && (aborting != ABORT_INTERRUPT)) {
1117 * If we found any errors in this batch of children and the -k flag
1118 * wasn't given, we set the aborting flag so no more jobs get
1121 aborting = ABORT_ERROR;
1124 if (return_job_token)
1127 if (aborting == ABORT_ERROR && jobTokensRunning == 0) {
1129 * If we are aborting and the job table is now empty, we finish.
1136 *-----------------------------------------------------------------------
1138 * Touch the given target. Called by JobStart when the -t flag was
1142 * gn the node of the file to touch
1143 * silent TRUE if should not print message
1149 * The data modification of the file is changed. In addition, if the
1150 * file did not exist, it is created.
1151 *-----------------------------------------------------------------------
1154 Job_Touch(GNode *gn, Boolean silent)
1156 int streamID; /* ID of stream opened to do the touch */
1157 struct utimbuf times; /* Times for utime() call */
1159 if (gn->type & (OP_JOIN|OP_USE|OP_USEBEFORE|OP_EXEC|OP_OPTIONAL|
1160 OP_SPECIAL|OP_PHONY)) {
1162 * .JOIN, .USE, .ZEROTIME and .OPTIONAL targets are "virtual" targets
1163 * and, as such, shouldn't really be created.
1168 if (!silent || NoExecute(gn)) {
1169 (void)fprintf(stdout, "touch %s\n", gn->name);
1170 (void)fflush(stdout);
1173 if (NoExecute(gn)) {
1177 if (gn->type & OP_ARCHV) {
1179 } else if (gn->type & OP_LIB) {
1182 char *file = gn->path ? gn->path : gn->name;
1184 times.actime = times.modtime = now;
1185 if (utime(file, ×) < 0){
1186 streamID = open(file, O_RDWR | O_CREAT, 0666);
1188 if (streamID >= 0) {
1192 * Read and write a byte to the file to change the
1193 * modification time, then close the file.
1195 if (read(streamID, &c, 1) == 1) {
1196 (void)lseek(streamID, (off_t)0, SEEK_SET);
1197 while (write(streamID, &c, 1) == -1 && errno == EAGAIN)
1201 (void)close(streamID);
1203 (void)fprintf(stdout, "*** couldn't touch %s: %s",
1204 file, strerror(errno));
1205 (void)fflush(stdout);
1212 *-----------------------------------------------------------------------
1213 * Job_CheckCommands --
1214 * Make sure the given node has all the commands it needs.
1217 * gn The target whose commands need verifying
1218 * abortProc Function to abort with message
1221 * TRUE if the commands list is/was ok.
1224 * The node will have commands from the .DEFAULT rule added to it
1226 *-----------------------------------------------------------------------
1229 Job_CheckCommands(GNode *gn, void (*abortProc)(const char *, ...))
1231 if (OP_NOP(gn->type) && Lst_IsEmpty(gn->commands) &&
1232 ((gn->type & OP_LIB) == 0 || Lst_IsEmpty(gn->children))) {
1234 * No commands. Look for .DEFAULT rule from which we might infer
1237 if ((DEFAULT != NULL) && !Lst_IsEmpty(DEFAULT->commands) &&
1238 (gn->type & OP_SPECIAL) == 0) {
1241 * Make only looks for a .DEFAULT if the node was never the
1242 * target of an operator, so that's what we do too. If
1243 * a .DEFAULT was given, we substitute its commands for gn's
1244 * commands and set the IMPSRC variable to be the target's name
1245 * The DEFAULT node acts like a transformation rule, in that
1246 * gn also inherits any attributes or sources attached to
1249 Make_HandleUse(DEFAULT, gn);
1250 Var_Set(IMPSRC, Var_Value(TARGET, gn, &p1), gn, 0);
1252 } else if (Dir_MTime(gn, 0) == 0 && (gn->type & OP_SPECIAL) == 0) {
1254 * The node wasn't the target of an operator we have no .DEFAULT
1255 * rule to go on and the target doesn't already exist. There's
1256 * nothing more we can do for this branch. If the -k flag wasn't
1257 * given, we stop in our tracks, otherwise we just don't update
1258 * this node's parents so they never get examined.
1260 static const char msg[] = ": don't know how to make";
1262 if (gn->flags & FROM_DEPEND) {
1263 if (!Job_RunTarget(".STALE", gn->fname))
1264 fprintf(stdout, "%s: %s, %d: ignoring stale %s for %s\n",
1265 progname, gn->fname, gn->lineno, makeDependfile,
1270 if (gn->type & OP_OPTIONAL) {
1271 (void)fprintf(stdout, "%s%s %s (ignored)\n", progname,
1273 (void)fflush(stdout);
1274 } else if (keepgoing) {
1275 (void)fprintf(stdout, "%s%s %s (continuing)\n", progname,
1277 (void)fflush(stdout);
1280 (*abortProc)("%s%s %s. Stop", progname, msg, gn->name);
1289 *-----------------------------------------------------------------------
1291 * Execute the shell for the given job. Called from JobStart
1294 * job Job to execute
1300 * A shell is executed, outputs is altered and the Job structure added
1303 *-----------------------------------------------------------------------
1306 JobExec(Job *job, char **argv)
1308 int cpid; /* ID of new child */
1311 job->flags &= ~JOB_TRACED;
1316 (void)fprintf(debug_file, "Running %s %sly\n", job->node->name, "local");
1317 (void)fprintf(debug_file, "\tCommand: ");
1318 for (i = 0; argv[i] != NULL; i++) {
1319 (void)fprintf(debug_file, "%s ", argv[i]);
1321 (void)fprintf(debug_file, "\n");
1325 * Some jobs produce no output and it's disconcerting to have
1326 * no feedback of their running (since they produce no output, the
1327 * banner with their name in it never appears). This is an attempt to
1328 * provide that feedback, even if nothing follows it.
1330 if ((lastNode != job->node) && !(job->flags & JOB_SILENT)) {
1331 MESSAGE(stdout, job->node);
1332 lastNode = job->node;
1335 /* No interruptions until this job is on the `jobs' list */
1338 /* Pre-emptively mark job running, pid still zero though */
1339 job->job_state = JOB_ST_RUNNING;
1343 Punt("Cannot vfork: %s", strerror(errno));
1351 meta_job_child(job);
1355 * Reset all signal handlers; this is necessary because we also
1356 * need to unblock signals before we exec(2).
1360 /* Now unblock signals */
1361 sigemptyset(&tmask);
1362 JobSigUnlock(&tmask);
1365 * Must duplicate the input stream down to the child's input and
1366 * reset it to the beginning (again). Since the stream was marked
1367 * close-on-exec, we must clear that bit in the new input.
1369 if (dup2(FILENO(job->cmdFILE), 0) == -1) {
1370 execError("dup2", "job->cmdFILE");
1373 (void)fcntl(0, F_SETFD, 0);
1374 (void)lseek(0, (off_t)0, SEEK_SET);
1376 if (Always_pass_job_queue ||
1377 (job->node->type & (OP_MAKE | OP_SUBMAKE))) {
1379 * Pass job token pipe to submakes.
1381 fcntl(tokenWaitJob.inPipe, F_SETFD, 0);
1382 fcntl(tokenWaitJob.outPipe, F_SETFD, 0);
1386 * Set up the child's output to be routed through the pipe
1387 * we've created for it.
1389 if (dup2(job->outPipe, 1) == -1) {
1390 execError("dup2", "job->outPipe");
1394 * The output channels are marked close on exec. This bit was
1395 * duplicated by the dup2(on some systems), so we have to clear
1396 * it before routing the shell's error output to the same place as
1397 * its standard output.
1399 (void)fcntl(1, F_SETFD, 0);
1400 if (dup2(1, 2) == -1) {
1401 execError("dup2", "1, 2");
1406 * We want to switch the child into a different process family so
1407 * we can kill it and all its descendants in one fell swoop,
1408 * by killing its process family, but not commit suicide.
1410 #if defined(HAVE_SETPGID)
1411 (void)setpgid(0, getpid());
1413 #if defined(HAVE_SETSID)
1414 /* XXX: dsl - I'm sure this should be setpgrp()... */
1417 (void)setpgrp(0, getpid());
1423 (void)execv(shellPath, argv);
1424 execError("exec", shellPath);
1428 /* Parent, continuing after the child exec */
1431 Trace_Log(JOBSTART, job);
1434 * Set the current position in the buffer to the beginning
1435 * and mark another stream to watch in the outputs mask
1441 if (job->cmdFILE != NULL && job->cmdFILE != stdout) {
1442 (void)fclose(job->cmdFILE);
1443 job->cmdFILE = NULL;
1447 * Now the job is actually running, add it to the table.
1450 fprintf(debug_file, "JobExec(%s): pid %d added to jobs table\n",
1451 job->node->name, job->pid);
1452 job_table_dump("job started");
1454 JobSigUnlock(&mask);
1458 *-----------------------------------------------------------------------
1460 * Create the argv needed to execute the shell for a given job.
1467 *-----------------------------------------------------------------------
1470 JobMakeArgv(Job *job, char **argv)
1473 static char args[10]; /* For merged arguments */
1475 argv[0] = UNCONST(shellName);
1478 if ((commandShell->exit && (*commandShell->exit != '-')) ||
1479 (commandShell->echo && (*commandShell->echo != '-')))
1482 * At least one of the flags doesn't have a minus before it, so
1483 * merge them together. Have to do this because the *(&(@*#*&#$#
1484 * Bourne shell thinks its second argument is a file to source.
1485 * Grrrr. Note the ten-character limitation on the combined arguments.
1487 (void)snprintf(args, sizeof(args), "-%s%s",
1488 ((job->flags & JOB_IGNERR) ? "" :
1489 (commandShell->exit ? commandShell->exit : "")),
1490 ((job->flags & JOB_SILENT) ? "" :
1491 (commandShell->echo ? commandShell->echo : "")));
1498 if (!(job->flags & JOB_IGNERR) && commandShell->exit) {
1499 argv[argc] = UNCONST(commandShell->exit);
1502 if (!(job->flags & JOB_SILENT) && commandShell->echo) {
1503 argv[argc] = UNCONST(commandShell->echo);
1511 *-----------------------------------------------------------------------
1513 * Start a target-creation process going for the target described
1514 * by the graph node gn.
1517 * gn target to create
1518 * flags flags for the job to override normal ones.
1519 * e.g. JOB_SPECIAL or JOB_IGNDOTS
1520 * previous The previous Job structure for this node, if any.
1523 * JOB_ERROR if there was an error in the commands, JOB_FINISHED
1524 * if there isn't actually anything left to do for the job and
1525 * JOB_RUNNING if the job has been started.
1528 * A new Job node is created and added to the list of running
1529 * jobs. PMake is forked and a child shell created.
1531 * NB: I'm fairly sure that this code is never called with JOB_SPECIAL set
1532 * JOB_IGNDOTS is never set (dsl)
1533 * Also the return value is ignored by everyone.
1534 *-----------------------------------------------------------------------
1537 JobStart(GNode *gn, int flags)
1539 Job *job; /* new job descriptor */
1540 char *argv[10]; /* Argument vector to shell */
1541 Boolean cmdsOK; /* true if the nodes commands were all right */
1542 Boolean noExec; /* Set true if we decide not to run the job */
1543 int tfd; /* File descriptor to the temp file */
1545 for (job = job_table; job < job_table_end; job++) {
1546 if (job->job_state == JOB_ST_FREE)
1549 if (job >= job_table_end)
1550 Punt("JobStart no job slots vacant");
1552 memset(job, 0, sizeof *job);
1553 job->job_state = JOB_ST_SETUP;
1554 if (gn->type & OP_SPECIAL)
1555 flags |= JOB_SPECIAL;
1558 job->tailCmds = NULL;
1561 * Set the initial value of the flags for this job based on the global
1562 * ones and the node's attributes... Any flags supplied by the caller
1563 * are also added to the field.
1566 if (Targ_Ignore(gn)) {
1567 job->flags |= JOB_IGNERR;
1569 if (Targ_Silent(gn)) {
1570 job->flags |= JOB_SILENT;
1572 job->flags |= flags;
1575 * Check the commands now so any attributes from .DEFAULT have a chance
1576 * to migrate to the node
1578 cmdsOK = Job_CheckCommands(gn, Error);
1580 job->inPollfd = NULL;
1582 * If the -n flag wasn't given, we open up OUR (not the child's)
1583 * temporary file to stuff commands in it. The thing is rd/wr so we don't
1584 * need to reopen it to feed it to the shell. If the -n flag *was* given,
1585 * we just set the file to be stdout. Cute, huh?
1587 if (((gn->type & OP_MAKE) && !(noRecursiveExecute)) ||
1588 (!noExecute && !touchFlag)) {
1590 * tfile is the name of a file into which all shell commands are
1591 * put. It is removed before the child shell is executed, unless
1592 * DEBUG(SCRIPT) is set.
1597 * We're serious here, but if the commands were bogus, we're
1601 PrintOnError(gn, NULL); /* provide some clue */
1606 tfd = mkTempFile(TMPPAT, &tfile);
1608 (void)eunlink(tfile);
1609 JobSigUnlock(&mask);
1611 job->cmdFILE = fdopen(tfd, "w+");
1612 if (job->cmdFILE == NULL) {
1613 Punt("Could not fdopen %s", tfile);
1615 (void)fcntl(FILENO(job->cmdFILE), F_SETFD, FD_CLOEXEC);
1617 * Send the commands to the command file, flush all its buffers then
1618 * rewind and remove the thing.
1624 meta_job_start(job, gn);
1625 if (Targ_Silent(gn)) { /* might have changed */
1626 job->flags |= JOB_SILENT;
1631 * We can do all the commands at once. hooray for sanity
1634 Lst_ForEach(gn->commands, JobPrintCommand, job);
1637 * If we didn't print out any commands to the shell script,
1638 * there's not much point in executing the shell, is there?
1640 if (numCommands == 0) {
1645 } else if (NoExecute(gn)) {
1647 * Not executing anything -- just print all the commands to stdout
1648 * in one fell swoop. This will still set up job->tailCmds correctly.
1650 if (lastNode != gn) {
1651 MESSAGE(stdout, gn);
1654 job->cmdFILE = stdout;
1656 * Only print the commands if they're ok, but don't die if they're
1657 * not -- just let the user know they're bad and keep going. It
1658 * doesn't do any harm in this case and may do some good.
1661 Lst_ForEach(gn->commands, JobPrintCommand, job);
1664 * Don't execute the shell, thank you.
1669 * Just touch the target and note that no shell should be executed.
1670 * Set cmdFILE to stdout to make life easier. Check the commands, too,
1671 * but don't die if they're no good -- it does no harm to keep working
1674 job->cmdFILE = stdout;
1675 Job_Touch(gn, job->flags&JOB_SILENT);
1678 /* Just in case it isn't already... */
1679 (void)fflush(job->cmdFILE);
1682 * If we're not supposed to execute a shell, don't.
1685 if (!(job->flags & JOB_SPECIAL))
1688 * Unlink and close the command file if we opened one
1690 if (job->cmdFILE != stdout) {
1691 if (job->cmdFILE != NULL) {
1692 (void)fclose(job->cmdFILE);
1693 job->cmdFILE = NULL;
1698 * We only want to work our way up the graph if we aren't here because
1699 * the commands for the job were no good.
1701 if (cmdsOK && aborting == 0) {
1702 if (job->tailCmds != NULL) {
1703 Lst_ForEachFrom(job->node->commands, job->tailCmds,
1707 job->node->made = MADE;
1708 Make_Update(job->node);
1710 job->job_state = JOB_ST_FREE;
1711 return cmdsOK ? JOB_FINISHED : JOB_ERROR;
1715 * Set up the control arguments to the shell. This is based on the flags
1716 * set earlier for this job.
1718 JobMakeArgv(job, argv);
1720 /* Create the pipe by which we'll get the shell's output. */
1721 JobCreatePipe(job, 3);
1724 return(JOB_RUNNING);
1728 JobOutput(Job *job, char *cp, char *endp, int msg)
1732 if (commandShell->noPrint) {
1733 ecp = Str_FindSubstring(cp, commandShell->noPrint);
1734 while (ecp != NULL) {
1737 if (!beSilent && msg && job->node != lastNode) {
1738 MESSAGE(stdout, job->node);
1739 lastNode = job->node;
1742 * The only way there wouldn't be a newline after
1743 * this line is if it were the last in the buffer.
1744 * however, since the non-printable comes after it,
1745 * there must be a newline, so we don't print one.
1747 (void)fprintf(stdout, "%s", cp);
1748 (void)fflush(stdout);
1750 cp = ecp + commandShell->noPLen;
1753 * Still more to print, look again after skipping
1754 * the whitespace following the non-printable
1758 while (*cp == ' ' || *cp == '\t' || *cp == '\n') {
1761 ecp = Str_FindSubstring(cp, commandShell->noPrint);
1771 *-----------------------------------------------------------------------
1773 * This function is called at different times depending on
1774 * whether the user has specified that output is to be collected
1775 * via pipes or temporary files. In the former case, we are called
1776 * whenever there is something to read on the pipe. We collect more
1777 * output from the given job and store it in the job's outBuf. If
1778 * this makes up a line, we print it tagged by the job's identifier,
1780 * If output has been collected in a temporary file, we open the
1781 * file and read it line by line, transfering it to our own
1782 * output channel until the file is empty. At which point we
1783 * remove the temporary file.
1784 * In both cases, however, we keep our figurative eye out for the
1785 * 'noPrint' line for the shell from which the output came. If
1786 * we recognize a line, we don't print it. If the command is not
1787 * alone on the line (the character after it is not \0 or \n), we
1788 * do print whatever follows it.
1791 * job the job whose output needs printing
1792 * finish TRUE if this is the last time we'll be called
1799 * curPos may be shifted as may the contents of outBuf.
1800 *-----------------------------------------------------------------------
1803 JobDoOutput(Job *job, Boolean finish)
1805 Boolean gotNL = FALSE; /* true if got a newline */
1806 Boolean fbuf; /* true if our buffer filled up */
1807 int nr; /* number of bytes read */
1808 int i; /* auxiliary index into outBuf */
1809 int max; /* limit for i (end of current data) */
1810 int nRead; /* (Temporary) number of bytes read */
1813 * Read as many bytes as will fit in the buffer.
1819 nRead = read(job->inPipe, &job->outBuf[job->curPos],
1820 JOB_BUFSIZE - job->curPos);
1822 if (errno == EAGAIN)
1825 perror("JobDoOutput(piperead)");
1833 * If we hit the end-of-file (the job is dead), we must flush its
1834 * remaining output, so pretend we read a newline if there's any
1835 * output remaining in the buffer.
1836 * Also clear the 'finish' flag so we stop looping.
1838 if ((nr == 0) && (job->curPos != 0)) {
1839 job->outBuf[job->curPos] = '\n';
1842 } else if (nr == 0) {
1847 * Look for the last newline in the bytes we just got. If there is
1848 * one, break out of the loop with 'i' as its index and gotNL set
1851 max = job->curPos + nr;
1852 for (i = job->curPos + nr - 1; i >= job->curPos; i--) {
1853 if (job->outBuf[i] == '\n') {
1856 } else if (job->outBuf[i] == '\0') {
1860 job->outBuf[i] = ' ';
1866 if (job->curPos == JOB_BUFSIZE) {
1868 * If we've run out of buffer space, we have no choice
1869 * but to print the stuff. sigh.
1875 if (gotNL || fbuf) {
1877 * Need to send the output to the screen. Null terminate it
1878 * first, overwriting the newline character if there was one.
1879 * So long as the line isn't one we should filter (according
1880 * to the shell description), we print the line, preceded
1881 * by a target banner if this target isn't the same as the
1882 * one for which we last printed something.
1883 * The rest of the data in the buffer are then shifted down
1884 * to the start of the buffer and curPos is set accordingly.
1886 job->outBuf[i] = '\0';
1887 if (i >= job->curPos) {
1890 cp = JobOutput(job, job->outBuf, &job->outBuf[i], FALSE);
1893 * There's still more in that thar buffer. This time, though,
1894 * we know there's no newline at the end, so we add one of
1895 * our own free will.
1898 if (!beSilent && job->node != lastNode) {
1899 MESSAGE(stdout, job->node);
1900 lastNode = job->node;
1904 meta_job_output(job, cp, gotNL ? "\n" : "");
1907 (void)fprintf(stdout, "%s%s", cp, gotNL ? "\n" : "");
1908 (void)fflush(stdout);
1912 * max is the last offset still in the buffer. Move any remaining
1913 * characters to the start of the buffer and update the end marker
1917 (void)memmove(job->outBuf, &job->outBuf[i + 1], max - (i + 1));
1918 job->curPos = max - (i + 1);
1926 * If the finish flag is true, we must loop until we hit
1927 * end-of-file on the pipe. This is guaranteed to happen
1928 * eventually since the other end of the pipe is now closed
1929 * (we closed it explicitly and the child has exited). When
1930 * we do get an EOF, finish will be set FALSE and we'll fall
1942 * Unfortunately it is too complicated to run .BEGIN, .END,
1943 * and .INTERRUPT job in the parallel job module. This has
1944 * the nice side effect that it avoids a lot of other problems.
1946 Lst lst = Lst_Init(FALSE);
1947 Lst_AtEnd(lst, targ);
1948 (void)Make_Run(lst);
1949 Lst_Destroy(lst, NULL);
1950 JobStart(targ, JOB_SPECIAL);
1951 while (jobTokensRunning) {
1955 Compat_Make(targ, targ);
1956 if (targ->made == ERROR) {
1957 PrintOnError(targ, "\n\nStop.");
1964 *-----------------------------------------------------------------------
1965 * Job_CatchChildren --
1966 * Handle the exit of a child. Called from Make_Make.
1969 * block TRUE if should block on the wait
1975 * The job descriptor is removed from the list of children.
1978 * We do waits, blocking or not, according to the wisdom of our
1979 * caller, until there are no more children to report. For each
1980 * job, call JobFinish to finish things off.
1982 *-----------------------------------------------------------------------
1986 Job_CatchChildren(void)
1988 int pid; /* pid of dead child */
1989 WAIT_T status; /* Exit/termination status */
1992 * Don't even bother if we know there's no one around.
1994 if (jobTokensRunning == 0)
1997 while ((pid = waitpid((pid_t) -1, &status, WNOHANG | WUNTRACED)) > 0) {
1999 (void)fprintf(debug_file, "Process %d exited/stopped status %x.\n", pid,
2000 WAIT_STATUS(status));
2002 JobReapChild(pid, status, TRUE);
2007 * It is possible that wait[pid]() was called from elsewhere,
2008 * this lets us reap jobs regardless.
2011 JobReapChild(pid_t pid, WAIT_T status, Boolean isJobs)
2013 Job *job; /* job descriptor for dead child */
2016 * Don't even bother if we know there's no one around.
2018 if (jobTokensRunning == 0)
2021 job = JobFindPid(pid, JOB_ST_RUNNING, isJobs);
2024 if (!lurking_children)
2025 Error("Child (%d) status %x not in table?", pid, status);
2027 return; /* not ours */
2029 if (WIFSTOPPED(status)) {
2031 (void)fprintf(debug_file, "Process %d (%s) stopped.\n",
2032 job->pid, job->node->name);
2034 if (!make_suspended) {
2035 switch (WSTOPSIG(status)) {
2037 (void)printf("*** [%s] Suspended\n", job->node->name);
2040 (void)printf("*** [%s] Stopped\n", job->node->name);
2043 (void)printf("*** [%s] Stopped -- signal %d\n",
2044 job->node->name, WSTOPSIG(status));
2046 job->job_suspended = 1;
2048 (void)fflush(stdout);
2052 job->job_state = JOB_ST_FINISHED;
2053 job->exit_status = WAIT_STATUS(status);
2055 JobFinish(job, status);
2059 *-----------------------------------------------------------------------
2060 * Job_CatchOutput --
2061 * Catch the output from our children, if we're using
2062 * pipes do so. Otherwise just block time until we get a
2063 * signal(most likely a SIGCHLD) since there's no point in
2064 * just spinning when there's nothing to do and the reaping
2065 * of a child can wait for a while.
2071 * Output is read from pipes if we're piping.
2072 * -----------------------------------------------------------------------
2075 Job_CatchOutput(void)
2081 (void)fflush(stdout);
2083 /* The first fd in the list is the job token pipe */
2085 nready = poll(fds + 1 - wantToken, nfds - 1 + wantToken, POLL_MSEC);
2086 } while (nready < 0 && errno == EINTR);
2089 Punt("poll: %s", strerror(errno));
2091 if (nready > 0 && readyfd(&childExitJob)) {
2094 count = read(childExitJob.inPipe, &token, 1);
2097 Punt("unexpected eof on token pipe");
2099 Punt("token pipe read: %s", strerror(errno));
2101 if (token == DO_JOB_RESUME[0])
2102 /* Complete relay requested from our SIGCONT handler */
2111 Job_CatchChildren();
2115 for (i = 2; i < nfds; i++) {
2116 if (!fds[i].revents)
2119 if (job->job_state == JOB_ST_RUNNING)
2120 JobDoOutput(job, FALSE);
2127 *-----------------------------------------------------------------------
2129 * Start the creation of a target. Basically a front-end for
2130 * JobStart used by the Make module.
2136 * Another job is started.
2138 *-----------------------------------------------------------------------
2143 (void)JobStart(gn, 0);
2149 if (shellPath == NULL) {
2151 * We are using the default shell, which may be an absolute
2152 * path if DEFSHELL_CUSTOM is defined.
2154 shellName = commandShell->name;
2155 #ifdef DEFSHELL_CUSTOM
2156 if (*shellName == '/') {
2157 shellPath = shellName;
2158 shellName = strrchr(shellPath, '/');
2162 shellPath = str_concat(_PATH_DEFSHELLDIR, shellName, STR_ADDSLASH);
2164 if (commandShell->exit == NULL) {
2165 commandShell->exit = "";
2167 if (commandShell->echo == NULL) {
2168 commandShell->echo = "";
2170 if (commandShell->hasErrCtl && *commandShell->exit) {
2172 strcmp(commandShell->exit, &shellErrFlag[1]) != 0) {
2174 shellErrFlag = NULL;
2176 if (!shellErrFlag) {
2177 int n = strlen(commandShell->exit) + 2;
2179 shellErrFlag = bmake_malloc(n);
2181 snprintf(shellErrFlag, n, "-%s", commandShell->exit);
2184 } else if (shellErrFlag) {
2186 shellErrFlag = NULL;
2191 * Returns the string literal that is used in the current command shell
2192 * to produce a newline character.
2195 Shell_GetNewline(void)
2198 return commandShell->newline;
2207 } else if (!Var_Exists(MAKE_JOB_PREFIX, VAR_GLOBAL)) {
2208 Var_Set(MAKE_JOB_PREFIX, "---", VAR_GLOBAL, 0);
2211 targPrefix = Var_Subst(NULL, "${" MAKE_JOB_PREFIX "}",
2212 VAR_GLOBAL, VARF_WANTRES);
2216 *-----------------------------------------------------------------------
2218 * Initialize the process module
2226 * lists and counters are initialized
2227 *-----------------------------------------------------------------------
2233 /* Allocate space for all the job info */
2234 job_table = bmake_malloc(maxJobs * sizeof *job_table);
2235 memset(job_table, 0, maxJobs * sizeof *job_table);
2236 job_table_end = job_table + maxJobs;
2244 Always_pass_job_queue = getBoolean(MAKE_ALWAYS_PASS_JOB_QUEUE,
2245 Always_pass_job_queue);
2247 Job_error_token = getBoolean(MAKE_JOB_ERROR_TOKEN, Job_error_token);
2251 * There is a non-zero chance that we already have children.
2252 * eg after 'make -f- <<EOF'
2253 * Since their termination causes a 'Child (pid) not in table' message,
2254 * Collect the status of any that are already dead, and suppress the
2255 * error message if there are any undead ones.
2259 rval = waitpid((pid_t) -1, &status, WNOHANG);
2263 lurking_children = 1;
2269 JobCreatePipe(&childExitJob, 3);
2271 /* We can only need to wait for tokens, children and output from each job */
2272 fds = bmake_malloc(sizeof (*fds) * (2 + maxJobs));
2273 jobfds = bmake_malloc(sizeof (*jobfds) * (2 + maxJobs));
2275 /* These are permanent entries and take slots 0 and 1 */
2276 watchfd(&tokenWaitJob);
2277 watchfd(&childExitJob);
2279 sigemptyset(&caught_signals);
2281 * Install a SIGCHLD handler.
2283 (void)bmake_signal(SIGCHLD, JobChildSig);
2284 sigaddset(&caught_signals, SIGCHLD);
2286 #define ADDSIG(s,h) \
2287 if (bmake_signal(s, SIG_IGN) != SIG_IGN) { \
2288 sigaddset(&caught_signals, s); \
2289 (void)bmake_signal(s, h); \
2293 * Catch the four signals that POSIX specifies if they aren't ignored.
2294 * JobPassSig will take care of calling JobInterrupt if appropriate.
2296 ADDSIG(SIGINT, JobPassSig_int)
2297 ADDSIG(SIGHUP, JobPassSig_term)
2298 ADDSIG(SIGTERM, JobPassSig_term)
2299 ADDSIG(SIGQUIT, JobPassSig_term)
2302 * There are additional signals that need to be caught and passed if
2303 * either the export system wants to be told directly of signals or if
2304 * we're giving each job its own process group (since then it won't get
2305 * signals from the terminal driver as we own the terminal)
2307 ADDSIG(SIGTSTP, JobPassSig_suspend)
2308 ADDSIG(SIGTTOU, JobPassSig_suspend)
2309 ADDSIG(SIGTTIN, JobPassSig_suspend)
2310 ADDSIG(SIGWINCH, JobCondPassSig)
2311 ADDSIG(SIGCONT, JobContinueSig)
2314 (void)Job_RunTarget(".BEGIN", NULL);
2315 postCommands = Targ_FindNode(".END", TARG_CREATE);
2318 static void JobSigReset(void)
2321 if (sigismember(&caught_signals, s)) { \
2322 (void)bmake_signal(s, SIG_DFL); \
2335 (void)bmake_signal(SIGCHLD, SIG_DFL);
2339 *-----------------------------------------------------------------------
2341 * Find a shell in 'shells' given its name.
2344 * A pointer to the Shell structure.
2349 *-----------------------------------------------------------------------
2352 JobMatchShell(const char *name)
2356 for (sh = shells; sh->name != NULL; sh++) {
2357 if (strcmp(name, sh->name) == 0)
2364 *-----------------------------------------------------------------------
2366 * Parse a shell specification and set up commandShell, shellPath
2367 * and shellName appropriately.
2370 * line The shell spec
2373 * FAILURE if the specification was incorrect.
2376 * commandShell points to a Shell structure (either predefined or
2377 * created from the shell spec), shellPath is the full path of the
2378 * shell described by commandShell, while shellName is just the
2379 * final component of shellPath.
2382 * A shell specification consists of a .SHELL target, with dependency
2383 * operator, followed by a series of blank-separated words. Double
2384 * quotes can be used to use blanks in words. A backslash escapes
2385 * anything (most notably a double-quote and a space) and
2386 * provides the functionality it does in C. Each word consists of
2387 * keyword and value separated by an equal sign. There should be no
2388 * unnecessary spaces in the word. The keywords are as follows:
2389 * name Name of shell.
2390 * path Location of shell.
2391 * quiet Command to turn off echoing.
2392 * echo Command to turn echoing on
2393 * filter Result of turning off echoing that shouldn't be
2395 * echoFlag Flag to turn echoing on at the start
2396 * errFlag Flag to turn error checking on at the start
2397 * hasErrCtl True if shell has error checking control
2398 * newline String literal to represent a newline char
2399 * check Command to turn on error checking if hasErrCtl
2400 * is TRUE or template of command to echo a command
2401 * for which error checking is off if hasErrCtl is
2403 * ignore Command to turn off error checking if hasErrCtl
2404 * is TRUE or template of command to execute a
2405 * command so as to ignore any errors it returns if
2406 * hasErrCtl is FALSE.
2408 *-----------------------------------------------------------------------
2411 Job_ParseShell(char *line)
2418 Boolean fullSpec = FALSE;
2421 while (isspace((unsigned char)*line)) {
2425 free(UNCONST(shellArgv));
2427 memset(&newShell, 0, sizeof(newShell));
2430 * Parse the specification by keyword
2432 words = brk_string(line, &argc, TRUE, &path);
2433 if (words == NULL) {
2434 Error("Unterminated quoted string [%s]", line);
2439 for (path = NULL, argv = words; argc != 0; argc--, argv++) {
2440 if (strncmp(*argv, "path=", 5) == 0) {
2442 } else if (strncmp(*argv, "name=", 5) == 0) {
2443 newShell.name = &argv[0][5];
2445 if (strncmp(*argv, "quiet=", 6) == 0) {
2446 newShell.echoOff = &argv[0][6];
2447 } else if (strncmp(*argv, "echo=", 5) == 0) {
2448 newShell.echoOn = &argv[0][5];
2449 } else if (strncmp(*argv, "filter=", 7) == 0) {
2450 newShell.noPrint = &argv[0][7];
2451 newShell.noPLen = strlen(newShell.noPrint);
2452 } else if (strncmp(*argv, "echoFlag=", 9) == 0) {
2453 newShell.echo = &argv[0][9];
2454 } else if (strncmp(*argv, "errFlag=", 8) == 0) {
2455 newShell.exit = &argv[0][8];
2456 } else if (strncmp(*argv, "hasErrCtl=", 10) == 0) {
2457 char c = argv[0][10];
2458 newShell.hasErrCtl = !((c != 'Y') && (c != 'y') &&
2459 (c != 'T') && (c != 't'));
2460 } else if (strncmp(*argv, "newline=", 8) == 0) {
2461 newShell.newline = &argv[0][8];
2462 } else if (strncmp(*argv, "check=", 6) == 0) {
2463 newShell.errCheck = &argv[0][6];
2464 } else if (strncmp(*argv, "ignore=", 7) == 0) {
2465 newShell.ignErr = &argv[0][7];
2466 } else if (strncmp(*argv, "errout=", 7) == 0) {
2467 newShell.errOut = &argv[0][7];
2468 } else if (strncmp(*argv, "comment=", 8) == 0) {
2469 newShell.commentChar = argv[0][8];
2471 Parse_Error(PARSE_FATAL, "Unknown keyword \"%s\"",
2482 * If no path was given, the user wants one of the pre-defined shells,
2483 * yes? So we find the one s/he wants with the help of JobMatchShell
2484 * and set things up the right way. shellPath will be set up by
2487 if (newShell.name == NULL) {
2488 Parse_Error(PARSE_FATAL, "Neither path nor name specified");
2492 if ((sh = JobMatchShell(newShell.name)) == NULL) {
2493 Parse_Error(PARSE_WARNING, "%s: No matching shell",
2499 shellName = newShell.name;
2501 /* Shell_Init has already been called! Do it again. */
2502 free(UNCONST(shellPath));
2509 * The user provided a path. If s/he gave nothing else (fullSpec is
2510 * FALSE), try and find a matching shell in the ones we know of.
2511 * Else we just take the specification at its word and copy it
2512 * to a new location. In either case, we need to record the
2513 * path the user gave for the shell.
2516 path = strrchr(path, '/');
2518 path = UNCONST(shellPath);
2522 if (newShell.name != NULL) {
2523 shellName = newShell.name;
2528 if ((sh = JobMatchShell(shellName)) == NULL) {
2529 Parse_Error(PARSE_WARNING, "%s: No matching shell",
2536 commandShell = bmake_malloc(sizeof(Shell));
2537 *commandShell = newShell;
2539 /* this will take care of shellErrFlag */
2543 if (commandShell->echoOn && commandShell->echoOff) {
2544 commandShell->hasEchoCtl = TRUE;
2547 if (!commandShell->hasErrCtl) {
2548 if (commandShell->errCheck == NULL) {
2549 commandShell->errCheck = "";
2551 if (commandShell->ignErr == NULL) {
2552 commandShell->ignErr = "%s\n";
2557 * Do not free up the words themselves, since they might be in use by the
2558 * shell specification.
2565 *-----------------------------------------------------------------------
2567 * Handle the receipt of an interrupt.
2570 * runINTERRUPT Non-zero if commands for the .INTERRUPT target
2571 * should be executed
2572 * signo signal received
2578 * All children are killed. Another job will be started if the
2579 * .INTERRUPT target was given.
2580 *-----------------------------------------------------------------------
2583 JobInterrupt(int runINTERRUPT, int signo)
2585 Job *job; /* job descriptor in that element */
2586 GNode *interrupt; /* the node describing the .INTERRUPT target */
2590 aborting = ABORT_INTERRUPT;
2594 for (job = job_table; job < job_table_end; job++) {
2595 if (job->job_state != JOB_ST_RUNNING)
2600 if ((gn->type & (OP_JOIN|OP_PHONY)) == 0 && !Targ_Precious(gn)) {
2601 char *file = (gn->path == NULL ? gn->name : gn->path);
2602 if (!noExecute && eunlink(file) != -1) {
2603 Error("*** %s removed", file);
2608 (void)fprintf(debug_file,
2609 "JobInterrupt passing signal %d to child %d.\n",
2612 KILLPG(job->pid, signo);
2616 JobSigUnlock(&mask);
2618 if (runINTERRUPT && !touchFlag) {
2619 interrupt = Targ_FindNode(".INTERRUPT", TARG_NOCREATE);
2620 if (interrupt != NULL) {
2621 ignoreErrors = FALSE;
2625 Trace_Log(MAKEINTR, 0);
2630 *-----------------------------------------------------------------------
2632 * Do final processing such as the running of the commands
2633 * attached to the .END target.
2636 * Number of errors reported.
2640 *-----------------------------------------------------------------------
2645 if (postCommands != NULL &&
2646 (!Lst_IsEmpty(postCommands->commands) ||
2647 !Lst_IsEmpty(postCommands->children))) {
2649 Error("Errors reported so .END ignored");
2651 JobRun(postCommands);
2658 *-----------------------------------------------------------------------
2660 * Cleanup any memory used by the jobs module
2667 *-----------------------------------------------------------------------
2678 *-----------------------------------------------------------------------
2680 * Waits for all running jobs to finish and returns. Sets 'aborting'
2681 * to ABORT_WAIT to prevent other jobs from starting.
2687 * Currently running jobs finish.
2689 *-----------------------------------------------------------------------
2694 aborting = ABORT_WAIT;
2695 while (jobTokensRunning != 0) {
2702 *-----------------------------------------------------------------------
2704 * Abort all currently running jobs without handling output or anything.
2705 * This function is to be called only in the event of a major
2706 * error. Most definitely NOT to be called from JobInterrupt.
2712 * All children are killed, not just the firstborn
2713 *-----------------------------------------------------------------------
2718 Job *job; /* the job descriptor in that element */
2721 aborting = ABORT_ERROR;
2723 if (jobTokensRunning) {
2724 for (job = job_table; job < job_table_end; job++) {
2725 if (job->job_state != JOB_ST_RUNNING)
2728 * kill the child process with increasingly drastic signals to make
2729 * darn sure it's dead.
2731 KILLPG(job->pid, SIGINT);
2732 KILLPG(job->pid, SIGKILL);
2737 * Catch as many children as want to report in at first, then give up
2739 while (waitpid((pid_t) -1, &foo, WNOHANG) > 0)
2745 *-----------------------------------------------------------------------
2747 * Tries to restart stopped jobs if there are slots available.
2748 * Called in process context in response to a SIGCONT.
2756 *-----------------------------------------------------------------------
2759 JobRestartJobs(void)
2763 for (job = job_table; job < job_table_end; job++) {
2764 if (job->job_state == JOB_ST_RUNNING &&
2765 (make_suspended || job->job_suspended)) {
2767 (void)fprintf(debug_file, "Restarting stopped job pid %d.\n",
2770 if (job->job_suspended) {
2771 (void)printf("*** [%s] Continued\n", job->node->name);
2772 (void)fflush(stdout);
2774 job->job_suspended = 0;
2775 if (KILLPG(job->pid, SIGCONT) != 0 && DEBUG(JOB)) {
2776 fprintf(debug_file, "Failed to send SIGCONT to %d\n", job->pid);
2779 if (job->job_state == JOB_ST_FINISHED)
2780 /* Job exit deferred after calling waitpid() in a signal handler */
2781 JobFinish(job, job->exit_status);
2789 if (job->inPollfd != NULL)
2790 Punt("Watching watched job");
2792 fds[nfds].fd = job->inPipe;
2793 fds[nfds].events = POLLIN;
2795 job->inPollfd = &fds[nfds];
2803 if (job->inPollfd == NULL)
2804 Punt("Unwatching unwatched job");
2805 i = job->inPollfd - fds;
2808 * Move last job in table into hole made by dead job.
2812 jobfds[i] = jobfds[nfds];
2813 jobfds[i]->inPollfd = &fds[i];
2815 job->inPollfd = NULL;
2821 if (job->inPollfd == NULL)
2822 Punt("Polling unwatched job");
2823 return (job->inPollfd->revents & POLLIN) != 0;
2827 *-----------------------------------------------------------------------
2829 * Put a token into the job pipe so that some make process can start
2833 * Allows more build jobs to be spawned somewhere.
2835 *-----------------------------------------------------------------------
2841 char tok = JOB_TOKENS[aborting], tok1;
2843 if (!Job_error_token && aborting == ABORT_ERROR) {
2844 if (jobTokensRunning == 0)
2846 tok = '+'; /* no error token */
2849 /* If we are depositing an error token flush everything else */
2850 while (tok != '+' && read(tokenWaitJob.inPipe, &tok1, 1) == 1)
2854 fprintf(debug_file, "(%d) aborting %d, deposit token %c\n",
2855 getpid(), aborting, tok);
2856 while (write(tokenWaitJob.outPipe, &tok, 1) == -1 && errno == EAGAIN)
2861 *-----------------------------------------------------------------------
2862 * Job_ServerStartTokenAdd --
2863 * Prep the job token pipe in the root make process.
2865 *-----------------------------------------------------------------------
2869 Job_ServerStart(int max_tokens, int jp_0, int jp_1)
2874 if (jp_0 >= 0 && jp_1 >= 0) {
2875 /* Pipe passed in from parent */
2876 tokenWaitJob.inPipe = jp_0;
2877 tokenWaitJob.outPipe = jp_1;
2878 (void)fcntl(jp_0, F_SETFD, FD_CLOEXEC);
2879 (void)fcntl(jp_1, F_SETFD, FD_CLOEXEC);
2883 JobCreatePipe(&tokenWaitJob, 15);
2885 snprintf(jobarg, sizeof(jobarg), "%d,%d",
2886 tokenWaitJob.inPipe, tokenWaitJob.outPipe);
2888 Var_Append(MAKEFLAGS, "-J", VAR_GLOBAL);
2889 Var_Append(MAKEFLAGS, jobarg, VAR_GLOBAL);
2892 * Preload the job pipe with one token per job, save the one
2893 * "extra" token for the primary job.
2895 * XXX should clip maxJobs against PIPE_BUF -- if max_tokens is
2896 * larger than the write buffer size of the pipe, we will
2899 for (i = 1; i < max_tokens; i++)
2904 *-----------------------------------------------------------------------
2905 * Job_TokenReturn --
2906 * Return a withdrawn token to the pool.
2908 *-----------------------------------------------------------------------
2912 Job_TokenReturn(void)
2915 if (jobTokensRunning < 0)
2916 Punt("token botch");
2917 if (jobTokensRunning || JOB_TOKENS[aborting] != '+')
2922 *-----------------------------------------------------------------------
2923 * Job_TokenWithdraw --
2924 * Attempt to withdraw a token from the pool.
2927 * Returns TRUE if a token was withdrawn, and FALSE if the pool
2928 * is currently empty.
2931 * If pool is empty, set wantToken so that we wake up
2932 * when a token is released.
2934 *-----------------------------------------------------------------------
2939 Job_TokenWithdraw(void)
2946 fprintf(debug_file, "Job_TokenWithdraw(%d): aborting %d, running %d\n",
2947 getpid(), aborting, jobTokensRunning);
2949 if (aborting || (jobTokensRunning >= maxJobs))
2952 count = read(tokenWaitJob.inPipe, &tok, 1);
2954 Fatal("eof on job pipe!");
2955 if (count < 0 && jobTokensRunning != 0) {
2956 if (errno != EAGAIN) {
2957 Fatal("job pipe read: %s", strerror(errno));
2960 fprintf(debug_file, "(%d) blocked for token\n", getpid());
2965 if (count == 1 && tok != '+') {
2966 /* make being abvorted - remove any other job tokens */
2968 fprintf(debug_file, "(%d) aborted by token %c\n", getpid(), tok);
2969 while (read(tokenWaitJob.inPipe, &tok1, 1) == 1)
2971 /* And put the stopper back */
2972 while (write(tokenWaitJob.outPipe, &tok, 1) == -1 && errno == EAGAIN)
2974 Fatal("A failure has been detected in another branch of the parallel make");
2977 if (count == 1 && jobTokensRunning == 0)
2978 /* We didn't want the token really */
2979 while (write(tokenWaitJob.outPipe, &tok, 1) == -1 && errno == EAGAIN)
2984 fprintf(debug_file, "(%d) withdrew token\n", getpid());
2989 *-----------------------------------------------------------------------
2991 * Run the named target if found. If a filename is specified, then
2992 * set that to the sources.
2998 * exits if the target fails.
3000 *-----------------------------------------------------------------------
3003 Job_RunTarget(const char *target, const char *fname) {
3004 GNode *gn = Targ_FindNode(target, TARG_NOCREATE);
3010 Var_Set(ALLSRC, fname, gn, 0);
3013 if (gn->made == ERROR) {
3014 PrintOnError(gn, "\n\nStop.");
3022 emul_poll(struct pollfd *fd, int nfd, int timeout)
3025 int i, maxfd, nselect, npoll;
3026 struct timeval tv, *tvp;
3033 for (i = 0; i < nfd; i++) {
3036 if (fd[i].events & POLLIN)
3037 FD_SET(fd[i].fd, &rfds);
3039 if (fd[i].events & POLLOUT)
3040 FD_SET(fd[i].fd, &wfds);
3042 if (fd[i].fd > maxfd)
3046 if (maxfd >= FD_SETSIZE) {
3047 Punt("Ran out of fd_set slots; "
3048 "recompile with a larger FD_SETSIZE.");
3054 usecs = timeout * 1000;
3055 tv.tv_sec = usecs / 1000000;
3056 tv.tv_usec = usecs % 1000000;
3060 nselect = select(maxfd + 1, &rfds, &wfds, 0, tvp);
3066 for (i = 0; i < nfd; i++) {
3067 if (FD_ISSET(fd[i].fd, &rfds))
3068 fd[i].revents |= POLLIN;
3070 if (FD_ISSET(fd[i].fd, &wfds))
3071 fd[i].revents |= POLLOUT;
3079 #endif /* USE_SELECT */