1 /* $NetBSD: job.c,v 1.172 2013/03/05 22:01:43 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 1.172 2013/03/05 22:01:43 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 1.172 2013/03/05 22:01:43 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>
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 * error handling variables
177 static int errors = 0; /* number of errors reported */
178 static int aborting = 0; /* why is the make aborting? */
179 #define ABORT_ERROR 1 /* Because of an error */
180 #define ABORT_INTERRUPT 2 /* Because it was interrupted */
181 #define ABORT_WAIT 3 /* Waiting for jobs to finish */
182 #define JOB_TOKENS "+EI+" /* Token to requeue for each abort state */
185 * this tracks the number of tokens currently "out" to build jobs.
187 int jobTokensRunning = 0;
188 int not_parallel = 0; /* set if .NOT_PARALLEL */
191 * XXX: Avoid SunOS bug... FILENO() is fp->_file, and file
192 * is a char! So when we go above 127 we turn negative!
194 #define FILENO(a) ((unsigned) fileno(a))
197 * post-make command processing. The node postCommands is really just the
198 * .END target but we keep it around to avoid having to search for it
201 static GNode *postCommands = NULL;
202 /* node containing commands to execute when
203 * everything else is done */
204 static int numCommands; /* The number of commands actually printed
205 * for a target. Should this number be
206 * 0, no shell will be executed. */
209 * Return values from JobStart.
211 #define JOB_RUNNING 0 /* Job is running */
212 #define JOB_ERROR 1 /* Error in starting the job */
213 #define JOB_FINISHED 2 /* The job is already finished */
216 * Descriptions for various shells.
218 * The build environment may set DEFSHELL_INDEX to one of
219 * DEFSHELL_INDEX_SH, DEFSHELL_INDEX_KSH, or DEFSHELL_INDEX_CSH, to
220 * select one of the prefedined shells as the default shell.
222 * Alternatively, the build environment may set DEFSHELL_CUSTOM to the
223 * name or the full path of a sh-compatible shell, which will be used as
226 * ".SHELL" lines in Makefiles can choose the default shell from the
227 # set defined here, or add additional shells.
230 #ifdef DEFSHELL_CUSTOM
231 #define DEFSHELL_INDEX_CUSTOM 0
232 #define DEFSHELL_INDEX_SH 1
233 #define DEFSHELL_INDEX_KSH 2
234 #define DEFSHELL_INDEX_CSH 3
235 #else /* !DEFSHELL_CUSTOM */
236 #define DEFSHELL_INDEX_SH 0
237 #define DEFSHELL_INDEX_KSH 1
238 #define DEFSHELL_INDEX_CSH 2
239 #endif /* !DEFSHELL_CUSTOM */
241 #ifndef DEFSHELL_INDEX
242 #define DEFSHELL_INDEX 0 /* DEFSHELL_INDEX_CUSTOM or DEFSHELL_INDEX_SH */
243 #endif /* !DEFSHELL_INDEX */
245 static Shell shells[] = {
246 #ifdef DEFSHELL_CUSTOM
248 * An sh-compatible shell with a non-standard name.
250 * Keep this in sync with the "sh" description below, but avoid
251 * non-portable features that might not be supplied by all
252 * sh-compatible shells.
256 FALSE, "", "", "", 0,
257 FALSE, "echo \"%s\"\n", "%s\n", "{ %s \n} || exit $?\n", "'\n'", '#',
261 #endif /* DEFSHELL_CUSTOM */
263 * SH description. Echo control is also possible and, under
264 * sun UNIX anyway, one can even control error checking.
268 FALSE, "", "", "", 0,
269 FALSE, "echo \"%s\"\n", "%s\n", "{ %s \n} || exit $?\n", "'\n'", '#',
270 #if defined(MAKE_NATIVE) && defined(__NetBSD__)
282 TRUE, "set +v", "set -v", "set +v", 6,
283 FALSE, "echo \"%s\"\n", "%s\n", "{ %s \n} || exit $?\n", "'\n'", '#',
288 * CSH description. The csh can do echo control by playing
289 * with the setting of the 'echo' shell variable. Sadly,
290 * however, it is unable to do error control nicely.
294 TRUE, "unset verbose", "set verbose", "unset verbose", 10,
295 FALSE, "echo \"%s\"\n", "csh -c \"%s || exit 0\"\n", "", "'\\\n'", '#',
303 FALSE, NULL, NULL, NULL, 0,
304 FALSE, NULL, NULL, NULL, NULL, 0,
308 static Shell *commandShell = &shells[DEFSHELL_INDEX]; /* this is the shell to
310 * commands in the Makefile.
312 * Job_ParseShell function */
313 const char *shellPath = NULL, /* full pathname of
314 * executable image */
315 *shellName = NULL; /* last component of shell */
316 static const char *shellArgv = NULL; /* Custom shell args */
319 STATIC Job *job_table; /* The structures that describe them */
320 STATIC Job *job_table_end; /* job_table + maxJobs */
321 static int wantToken; /* we want a token */
322 static int lurking_children = 0;
323 static int make_suspended = 0; /* non-zero if we've seen a SIGTSTP (etc) */
326 * Set of descriptors of pipes connected to
327 * the output channels of children
329 static struct pollfd *fds = NULL;
330 static Job **jobfds = NULL;
332 static void watchfd(Job *);
333 static void clearfd(Job *);
334 static int readyfd(Job *);
336 STATIC GNode *lastNode; /* The node for which output was most recently
338 static char *targPrefix = NULL; /* What we print at the start of TARG_FMT */
339 static Job tokenWaitJob; /* token wait pseudo-job */
341 static Job childExitJob; /* child exit pseudo-job */
342 #define CHILD_EXIT "."
343 #define DO_JOB_RESUME "R"
345 #define TARG_FMT "%s %s ---\n" /* Default format */
346 #define MESSAGE(fp, gn) \
348 (void)fprintf(fp, TARG_FMT, targPrefix, gn->name)
350 static sigset_t caught_signals; /* Set of signals we handle */
352 #define KILLPG(pid, sig) kill(-(pid), (sig))
354 #define KILLPG(pid, sig) killpg((pid), (sig))
357 static void JobChildSig(int);
358 static void JobContinueSig(int);
359 static Job *JobFindPid(int, int, Boolean);
360 static int JobPrintCommand(void *, void *);
361 static int JobSaveCommand(void *, void *);
362 static void JobClose(Job *);
363 static void JobExec(Job *, char **);
364 static void JobMakeArgv(Job *, char **);
365 static int JobStart(GNode *, int);
366 static char *JobOutput(Job *, char *, char *, int);
367 static void JobDoOutput(Job *, Boolean);
368 static Shell *JobMatchShell(const char *);
369 static void JobInterrupt(int, int) MAKE_ATTR_DEAD;
370 static void JobRestartJobs(void);
371 static void JobTokenAdd(void);
372 static void JobSigLock(sigset_t *);
373 static void JobSigUnlock(sigset_t *);
374 static void JobSigReset(void);
376 const char *malloc_options="A";
379 job_table_dump(const char *where)
383 fprintf(debug_file, "job table @ %s\n", where);
384 for (job = job_table; job < job_table_end; job++) {
385 fprintf(debug_file, "job %d, status %d, flags %d, pid %d\n",
386 (int)(job - job_table), job->job_state, job->flags, job->pid);
391 * JobSigLock/JobSigUnlock
393 * Signal lock routines to get exclusive access. Currently used to
394 * protect `jobs' and `stoppedJobs' list manipulations.
396 static void JobSigLock(sigset_t *omaskp)
398 if (sigprocmask(SIG_BLOCK, &caught_signals, omaskp) != 0) {
399 Punt("JobSigLock: sigprocmask: %s", strerror(errno));
404 static void JobSigUnlock(sigset_t *omaskp)
406 (void)sigprocmask(SIG_SETMASK, omaskp, NULL);
410 JobCreatePipe(Job *job, int minfd)
414 if (pipe(job->jobPipe) == -1)
415 Punt("Cannot create pipe: %s", strerror(errno));
417 /* Set close-on-exec flag for both */
418 (void)fcntl(job->jobPipe[0], F_SETFD, 1);
419 (void)fcntl(job->jobPipe[1], F_SETFD, 1);
422 * We mark the input side of the pipe non-blocking; we poll(2) the
423 * pipe when we're waiting for a job token, but we might lose the
424 * race for the token when a new one becomes available, so the read
425 * from the pipe should not block.
427 fcntl(job->jobPipe[0], F_SETFL,
428 fcntl(job->jobPipe[0], F_GETFL, 0) | O_NONBLOCK);
430 for (i = 0; i < 2; i++) {
431 /* Avoid using low numbered fds */
432 fd = fcntl(job->jobPipe[i], F_DUPFD, minfd);
434 close(job->jobPipe[i]);
435 job->jobPipe[i] = fd;
441 *-----------------------------------------------------------------------
443 * Pass a signal to a job
446 * signop Signal to send it
449 * None, except the job may bite it.
451 *-----------------------------------------------------------------------
454 JobCondPassSig(int signo)
459 (void)fprintf(debug_file, "JobCondPassSig(%d) called.\n", signo);
462 for (job = job_table; job < job_table_end; job++) {
463 if (job->job_state != JOB_ST_RUNNING)
466 (void)fprintf(debug_file,
467 "JobCondPassSig passing signal %d to child %d.\n",
470 KILLPG(job->pid, signo);
475 *-----------------------------------------------------------------------
480 * signo The signal number we've received
486 * Sends a token on the child exit pipe to wake us up from
489 *-----------------------------------------------------------------------
492 JobChildSig(int signo MAKE_ATTR_UNUSED)
494 while (write(childExitJob.outPipe, CHILD_EXIT, 1) == -1 && errno == EAGAIN)
500 *-----------------------------------------------------------------------
502 * Resume all stopped jobs.
505 * signo The signal number we've received
511 * Jobs start running again.
513 *-----------------------------------------------------------------------
516 JobContinueSig(int signo MAKE_ATTR_UNUSED)
519 * Defer sending to SIGCONT to our stopped children until we return
520 * from the signal handler.
522 while (write(childExitJob.outPipe, DO_JOB_RESUME, 1) == -1 &&
528 *-----------------------------------------------------------------------
530 * Pass a signal on to all jobs, then resend to ourselves.
533 * signo The signal number we've received
539 * We die by the same signal.
541 *-----------------------------------------------------------------------
543 MAKE_ATTR_DEAD static void
544 JobPassSig_int(int signo)
546 /* Run .INTERRUPT target then exit */
547 JobInterrupt(TRUE, signo);
550 MAKE_ATTR_DEAD static void
551 JobPassSig_term(int signo)
553 /* Dont run .INTERRUPT target then exit */
554 JobInterrupt(FALSE, signo);
558 JobPassSig_suspend(int signo)
560 sigset_t nmask, omask;
561 struct sigaction act;
563 /* Suppress job started/continued messages */
566 /* Pass the signal onto every job */
567 JobCondPassSig(signo);
570 * Send ourselves the signal now we've given the message to everyone else.
571 * Note we block everything else possible while we're getting the signal.
572 * This ensures that all our jobs get continued when we wake up before
573 * we take any other signal.
576 sigdelset(&nmask, signo);
577 (void)sigprocmask(SIG_SETMASK, &nmask, &omask);
579 act.sa_handler = SIG_DFL;
580 sigemptyset(&act.sa_mask);
582 (void)sigaction(signo, &act, NULL);
585 (void)fprintf(debug_file,
586 "JobPassSig passing signal %d to self.\n", signo);
589 (void)kill(getpid(), signo);
592 * We've been continued.
594 * A whole host of signals continue to happen!
595 * SIGCHLD for any processes that actually suspended themselves.
596 * SIGCHLD for any processes that exited while we were alseep.
597 * The SIGCONT that actually caused us to wakeup.
599 * Since we defer passing the SIGCONT on to our children until
600 * the main processing loop, we can be sure that all the SIGCHLD
601 * events will have happened by then - and that the waitpid() will
602 * collect the child 'suspended' events.
603 * For correct sequencing we just need to ensure we process the
604 * waitpid() before passign on the SIGCONT.
606 * In any case nothing else is needed here.
609 /* Restore handler and signal mask */
610 act.sa_handler = JobPassSig_suspend;
611 (void)sigaction(signo, &act, NULL);
612 (void)sigprocmask(SIG_SETMASK, &omask, NULL);
616 *-----------------------------------------------------------------------
618 * Compare the pid of the job with the given pid and return 0 if they
619 * are equal. This function is called from Job_CatchChildren
620 * to find the job descriptor of the finished job.
624 * pid process id desired
627 * Job with matching pid
631 *-----------------------------------------------------------------------
634 JobFindPid(int pid, int status, Boolean isJobs)
638 for (job = job_table; job < job_table_end; job++) {
639 if ((job->job_state == status) && job->pid == pid)
642 if (DEBUG(JOB) && isJobs)
643 job_table_dump("no pid");
648 *-----------------------------------------------------------------------
650 * Put out another command for the given job. If the command starts
651 * with an @ or a - we process it specially. In the former case,
652 * so long as the -s and -n flags weren't given to make, we stick
653 * a shell-specific echoOff command in the script. In the latter,
654 * we ignore errors for the entire job, unless the shell has error
656 * If the command is just "..." we take all future commands for this
657 * job to be commands to be executed once the entire graph has been
658 * made and return non-zero to signal that the end of the commands
659 * was reached. These commands are later attached to the postCommands
660 * node and executed by Job_End when all things are done.
661 * This function is called from JobStart via Lst_ForEach.
664 * cmdp command string to print
665 * jobp job for which to print it
668 * Always 0, unless the command was "..."
671 * If the command begins with a '-' and the shell has no error control,
672 * the JOB_IGNERR flag is set in the job descriptor.
673 * If the command is "..." and we're not ignoring such things,
674 * tailCmds is set to the successor node of the cmd.
675 * numCommands is incremented if the command is actually printed.
676 *-----------------------------------------------------------------------
679 JobPrintCommand(void *cmdp, void *jobp)
681 Boolean noSpecials; /* true if we shouldn't worry about
682 * inserting special commands into
683 * the input stream. */
684 Boolean shutUp = FALSE; /* true if we put a no echo command
685 * into the command file */
686 Boolean errOff = FALSE; /* true if we turned error checking
687 * off before printing the command
688 * and need to turn it back on */
689 const char *cmdTemplate; /* Template to use when printing the
691 char *cmdStart; /* Start of expanded command */
692 char *escCmd = NULL; /* Command with quotes/backticks escaped */
693 char *cmd = (char *)cmdp;
694 Job *job = (Job *)jobp;
697 noSpecials = NoExecute(job->node);
699 if (strcmp(cmd, "...") == 0) {
700 job->node->type |= OP_SAVE_CMDS;
701 if ((job->flags & JOB_IGNDOTS) == 0) {
702 job->tailCmds = Lst_Succ(Lst_Member(job->node->commands,
709 #define DBPRINTF(fmt, arg) if (DEBUG(JOB)) { \
710 (void)fprintf(debug_file, fmt, arg); \
712 (void)fprintf(job->cmdFILE, fmt, arg); \
713 (void)fflush(job->cmdFILE);
717 cmdStart = cmd = Var_Subst(NULL, cmd, job->node, FALSE);
719 cmdTemplate = "%s\n";
722 * Check for leading @' and -'s to control echoing and error checking.
724 while (*cmd == '@' || *cmd == '-' || (*cmd == '+')) {
727 shutUp = DEBUG(LOUD) ? FALSE : TRUE;
730 job->flags |= JOB_IGNERR;
736 * We're not actually executing anything...
737 * but this one needs to be - use compat mode just for it.
739 CompatRunCommand(cmdp, job->node);
747 while (isspace((unsigned char) *cmd))
751 * If the shell doesn't have error control the alternate echo'ing will
752 * be done (to avoid showing additional error checking code)
753 * and this will need the characters '$ ` \ "' escaped
756 if (!commandShell->hasErrCtl) {
757 /* Worst that could happen is every char needs escaping. */
758 escCmd = bmake_malloc((strlen(cmd) * 2) + 1);
759 for (i = 0, j= 0; cmd[i] != '\0'; i++, j++) {
760 if (cmd[i] == '$' || cmd[i] == '`' || cmd[i] == '\\' ||
769 if (!(job->flags & JOB_SILENT) && !noSpecials &&
770 commandShell->hasEchoCtl) {
771 DBPRINTF("%s\n", commandShell->echoOff);
773 if (commandShell->hasErrCtl)
780 if (commandShell->hasErrCtl) {
782 * we don't want the error-control commands showing
783 * up either, so we turn off echoing while executing
784 * them. We could put another field in the shell
785 * structure to tell JobDoOutput to look for this
786 * string too, but why make it any more complex than
789 if (!(job->flags & JOB_SILENT) && !shutUp &&
790 commandShell->hasEchoCtl) {
791 DBPRINTF("%s\n", commandShell->echoOff);
792 DBPRINTF("%s\n", commandShell->ignErr);
793 DBPRINTF("%s\n", commandShell->echoOn);
795 DBPRINTF("%s\n", commandShell->ignErr);
797 } else if (commandShell->ignErr &&
798 (*commandShell->ignErr != '\0'))
801 * The shell has no error control, so we need to be
802 * weird to get it to ignore any errors from the command.
803 * If echoing is turned on, we turn it off and use the
804 * errCheck template to echo the command. Leave echoing
805 * off so the user doesn't see the weirdness we go through
806 * to ignore errors. Set cmdTemplate to use the weirdness
807 * instead of the simple "%s\n" template.
809 if (!(job->flags & JOB_SILENT) && !shutUp) {
810 if (commandShell->hasEchoCtl) {
811 DBPRINTF("%s\n", commandShell->echoOff);
813 DBPRINTF(commandShell->errCheck, escCmd);
817 DBPRINTF(commandShell->errCheck, escCmd);
820 cmdTemplate = commandShell->ignErr;
822 * The error ignoration (hee hee) is already taken care
823 * of by the ignErr template, so pretend error checking
836 * If errors are being checked and the shell doesn't have error control
837 * but does supply an errOut template, then setup commands to run
841 if (!commandShell->hasErrCtl && commandShell->errOut &&
842 (*commandShell->errOut != '\0')) {
843 if (!(job->flags & JOB_SILENT) && !shutUp) {
844 if (commandShell->hasEchoCtl) {
845 DBPRINTF("%s\n", commandShell->echoOff);
847 DBPRINTF(commandShell->errCheck, escCmd);
850 /* If it's a comment line or blank, treat as an ignored error */
851 if ((escCmd[0] == commandShell->commentChar) ||
853 cmdTemplate = commandShell->ignErr;
855 cmdTemplate = commandShell->errOut;
860 if (DEBUG(SHELL) && strcmp(shellName, "sh") == 0 &&
861 (job->flags & JOB_TRACED) == 0) {
862 DBPRINTF("set -%s\n", "x");
863 job->flags |= JOB_TRACED;
866 DBPRINTF(cmdTemplate, cmd);
872 * If echoing is already off, there's no point in issuing the
873 * echoOff command. Otherwise we issue it and pretend it was on
874 * for the whole command...
876 if (!shutUp && !(job->flags & JOB_SILENT) && commandShell->hasEchoCtl){
877 DBPRINTF("%s\n", commandShell->echoOff);
880 DBPRINTF("%s\n", commandShell->errCheck);
882 if (shutUp && commandShell->hasEchoCtl) {
883 DBPRINTF("%s\n", commandShell->echoOn);
889 *-----------------------------------------------------------------------
891 * Save a command to be executed when everything else is done.
892 * Callback function for JobFinish...
898 * The command is tacked onto the end of postCommands's commands list.
900 *-----------------------------------------------------------------------
903 JobSaveCommand(void *cmd, void *gn)
905 cmd = Var_Subst(NULL, (char *)cmd, (GNode *)gn, FALSE);
906 (void)Lst_AtEnd(postCommands->commands, cmd);
912 *-----------------------------------------------------------------------
914 * Called to close both input and output pipes when a job is finished.
920 * The file descriptors associated with the job are closed.
922 *-----------------------------------------------------------------------
928 (void)close(job->outPipe);
931 JobDoOutput(job, TRUE);
932 (void)close(job->inPipe);
937 *-----------------------------------------------------------------------
939 * Do final processing for the given job including updating
940 * parents and starting new jobs as available/necessary. Note
941 * that we pay no attention to the JOB_IGNERR flag here.
942 * This is because when we're called because of a noexecute flag
943 * or something, jstat.w_status is 0 and when called from
944 * Job_CatchChildren, the status is zeroed if it s/b ignored.
948 * status sub-why job went away
954 * Final commands for the job are placed on postCommands.
956 * If we got an error and are aborting (aborting == ABORT_ERROR) and
957 * the job list is now empty, we are done for the day.
958 * If we recognized an error (errors !=0), we set the aborting flag
959 * to ABORT_ERROR so no more jobs will be started.
960 *-----------------------------------------------------------------------
964 JobFinish (Job *job, WAIT_T status)
966 Boolean done, return_job_token;
969 fprintf(debug_file, "Jobfinish: %d [%s], status %d\n",
970 job->pid, job->node->name, status);
973 if ((WIFEXITED(status) &&
974 (((WEXITSTATUS(status) != 0) && !(job->flags & JOB_IGNERR)))) ||
978 * If it exited non-zero and either we're doing things our
979 * way or we're not ignoring errors, the job is finished.
980 * Similarly, if the shell died because of a signal
981 * the job is also finished. In these
982 * cases, finish out the job's output before printing the exit
986 if (job->cmdFILE != NULL && job->cmdFILE != stdout) {
987 (void)fclose(job->cmdFILE);
991 } else if (WIFEXITED(status)) {
993 * Deal with ignored errors in -B mode. We need to print a message
994 * telling of the ignored error as well as setting status.w_status
995 * to 0 so the next command gets run. To do this, we set done to be
996 * TRUE if in -B mode and the job exited non-zero.
998 done = WEXITSTATUS(status) != 0;
1000 * Old comment said: "Note we don't
1001 * want to close down any of the streams until we know we're at the
1003 * But we do. Otherwise when are we going to print the rest of the
1009 * No need to close things down or anything.
1015 if (WIFEXITED(status)) {
1017 (void)fprintf(debug_file, "Process %d [%s] exited.\n",
1018 job->pid, job->node->name);
1020 if (WEXITSTATUS(status) != 0) {
1021 if (job->node != lastNode) {
1022 MESSAGE(stdout, job->node);
1023 lastNode = job->node;
1027 meta_job_error(job, job->node, job->flags, WEXITSTATUS(status));
1030 (void)printf("*** [%s] Error code %d%s\n",
1032 WEXITSTATUS(status),
1033 (job->flags & JOB_IGNERR) ? " (ignored)" : "");
1034 if (job->flags & JOB_IGNERR) {
1035 WAIT_STATUS(status) = 0;
1037 PrintOnError(job->node, NULL);
1039 } else if (DEBUG(JOB)) {
1040 if (job->node != lastNode) {
1041 MESSAGE(stdout, job->node);
1042 lastNode = job->node;
1044 (void)printf("*** [%s] Completed successfully\n",
1048 if (job->node != lastNode) {
1049 MESSAGE(stdout, job->node);
1050 lastNode = job->node;
1052 (void)printf("*** [%s] Signal %d\n",
1053 job->node->name, WTERMSIG(status));
1055 (void)fflush(stdout);
1060 meta_job_finish(job);
1064 return_job_token = FALSE;
1066 Trace_Log(JOBEND, job);
1067 if (!(job->flags & JOB_SPECIAL)) {
1068 if ((WAIT_STATUS(status) != 0) ||
1069 (aborting == ABORT_ERROR) ||
1070 (aborting == ABORT_INTERRUPT))
1071 return_job_token = TRUE;
1074 if ((aborting != ABORT_ERROR) && (aborting != ABORT_INTERRUPT) &&
1075 (WAIT_STATUS(status) == 0)) {
1077 * As long as we aren't aborting and the job didn't return a non-zero
1078 * status that we shouldn't ignore, we call Make_Update to update
1079 * the parents. In addition, any saved commands for the node are placed
1080 * on the .END target.
1082 if (job->tailCmds != NULL) {
1083 Lst_ForEachFrom(job->node->commands, job->tailCmds,
1087 job->node->made = MADE;
1088 if (!(job->flags & JOB_SPECIAL))
1089 return_job_token = TRUE;
1090 Make_Update(job->node);
1091 job->job_state = JOB_ST_FREE;
1092 } else if (WAIT_STATUS(status)) {
1094 job->job_state = JOB_ST_FREE;
1098 * Set aborting if any error.
1100 if (errors && !keepgoing && (aborting != ABORT_INTERRUPT)) {
1102 * If we found any errors in this batch of children and the -k flag
1103 * wasn't given, we set the aborting flag so no more jobs get
1106 aborting = ABORT_ERROR;
1109 if (return_job_token)
1112 if (aborting == ABORT_ERROR && jobTokensRunning == 0) {
1114 * If we are aborting and the job table is now empty, we finish.
1121 *-----------------------------------------------------------------------
1123 * Touch the given target. Called by JobStart when the -t flag was
1127 * gn the node of the file to touch
1128 * silent TRUE if should not print message
1134 * The data modification of the file is changed. In addition, if the
1135 * file did not exist, it is created.
1136 *-----------------------------------------------------------------------
1139 Job_Touch(GNode *gn, Boolean silent)
1141 int streamID; /* ID of stream opened to do the touch */
1142 struct utimbuf times; /* Times for utime() call */
1144 if (gn->type & (OP_JOIN|OP_USE|OP_USEBEFORE|OP_EXEC|OP_OPTIONAL|
1145 OP_SPECIAL|OP_PHONY)) {
1147 * .JOIN, .USE, .ZEROTIME and .OPTIONAL targets are "virtual" targets
1148 * and, as such, shouldn't really be created.
1153 if (!silent || NoExecute(gn)) {
1154 (void)fprintf(stdout, "touch %s\n", gn->name);
1155 (void)fflush(stdout);
1158 if (NoExecute(gn)) {
1162 if (gn->type & OP_ARCHV) {
1164 } else if (gn->type & OP_LIB) {
1167 char *file = gn->path ? gn->path : gn->name;
1169 times.actime = times.modtime = now;
1170 if (utime(file, ×) < 0){
1171 streamID = open(file, O_RDWR | O_CREAT, 0666);
1173 if (streamID >= 0) {
1177 * Read and write a byte to the file to change the
1178 * modification time, then close the file.
1180 if (read(streamID, &c, 1) == 1) {
1181 (void)lseek(streamID, (off_t)0, SEEK_SET);
1182 while (write(streamID, &c, 1) == -1 && errno == EAGAIN)
1186 (void)close(streamID);
1188 (void)fprintf(stdout, "*** couldn't touch %s: %s",
1189 file, strerror(errno));
1190 (void)fflush(stdout);
1197 *-----------------------------------------------------------------------
1198 * Job_CheckCommands --
1199 * Make sure the given node has all the commands it needs.
1202 * gn The target whose commands need verifying
1203 * abortProc Function to abort with message
1206 * TRUE if the commands list is/was ok.
1209 * The node will have commands from the .DEFAULT rule added to it
1211 *-----------------------------------------------------------------------
1214 Job_CheckCommands(GNode *gn, void (*abortProc)(const char *, ...))
1216 if (OP_NOP(gn->type) && Lst_IsEmpty(gn->commands) &&
1217 ((gn->type & OP_LIB) == 0 || Lst_IsEmpty(gn->children))) {
1219 * No commands. Look for .DEFAULT rule from which we might infer
1222 if ((DEFAULT != NULL) && !Lst_IsEmpty(DEFAULT->commands) &&
1223 (gn->type & OP_SPECIAL) == 0) {
1226 * Make only looks for a .DEFAULT if the node was never the
1227 * target of an operator, so that's what we do too. If
1228 * a .DEFAULT was given, we substitute its commands for gn's
1229 * commands and set the IMPSRC variable to be the target's name
1230 * The DEFAULT node acts like a transformation rule, in that
1231 * gn also inherits any attributes or sources attached to
1234 Make_HandleUse(DEFAULT, gn);
1235 Var_Set(IMPSRC, Var_Value(TARGET, gn, &p1), gn, 0);
1238 } else if (Dir_MTime(gn, 0) == 0 && (gn->type & OP_SPECIAL) == 0) {
1240 * The node wasn't the target of an operator we have no .DEFAULT
1241 * rule to go on and the target doesn't already exist. There's
1242 * nothing more we can do for this branch. If the -k flag wasn't
1243 * given, we stop in our tracks, otherwise we just don't update
1244 * this node's parents so they never get examined.
1246 static const char msg[] = ": don't know how to make";
1248 if (gn->flags & FROM_DEPEND) {
1249 if (!Job_RunTarget(".STALE", gn->fname))
1250 fprintf(stdout, "%s: %s, %d: ignoring stale %s for %s\n",
1251 progname, gn->fname, gn->lineno, makeDependfile,
1256 if (gn->type & OP_OPTIONAL) {
1257 (void)fprintf(stdout, "%s%s %s (ignored)\n", progname,
1259 (void)fflush(stdout);
1260 } else if (keepgoing) {
1261 (void)fprintf(stdout, "%s%s %s (continuing)\n", progname,
1263 (void)fflush(stdout);
1266 (*abortProc)("%s%s %s. Stop", progname, msg, gn->name);
1275 *-----------------------------------------------------------------------
1277 * Execute the shell for the given job. Called from JobStart
1280 * job Job to execute
1286 * A shell is executed, outputs is altered and the Job structure added
1289 *-----------------------------------------------------------------------
1292 JobExec(Job *job, char **argv)
1294 int cpid; /* ID of new child */
1297 job->flags &= ~JOB_TRACED;
1302 (void)fprintf(debug_file, "Running %s %sly\n", job->node->name, "local");
1303 (void)fprintf(debug_file, "\tCommand: ");
1304 for (i = 0; argv[i] != NULL; i++) {
1305 (void)fprintf(debug_file, "%s ", argv[i]);
1307 (void)fprintf(debug_file, "\n");
1311 * Some jobs produce no output and it's disconcerting to have
1312 * no feedback of their running (since they produce no output, the
1313 * banner with their name in it never appears). This is an attempt to
1314 * provide that feedback, even if nothing follows it.
1316 if ((lastNode != job->node) && !(job->flags & JOB_SILENT)) {
1317 MESSAGE(stdout, job->node);
1318 lastNode = job->node;
1321 /* No interruptions until this job is on the `jobs' list */
1324 /* Pre-emptively mark job running, pid still zero though */
1325 job->job_state = JOB_ST_RUNNING;
1329 Punt("Cannot vfork: %s", strerror(errno));
1337 meta_job_child(job);
1341 * Reset all signal handlers; this is necessary because we also
1342 * need to unblock signals before we exec(2).
1346 /* Now unblock signals */
1347 sigemptyset(&tmask);
1348 JobSigUnlock(&tmask);
1351 * Must duplicate the input stream down to the child's input and
1352 * reset it to the beginning (again). Since the stream was marked
1353 * close-on-exec, we must clear that bit in the new input.
1355 if (dup2(FILENO(job->cmdFILE), 0) == -1) {
1356 execError("dup2", "job->cmdFILE");
1359 (void)fcntl(0, F_SETFD, 0);
1360 (void)lseek(0, (off_t)0, SEEK_SET);
1362 if (job->node->type & OP_MAKE) {
1364 * Pass job token pipe to submakes.
1366 fcntl(tokenWaitJob.inPipe, F_SETFD, 0);
1367 fcntl(tokenWaitJob.outPipe, F_SETFD, 0);
1371 * Set up the child's output to be routed through the pipe
1372 * we've created for it.
1374 if (dup2(job->outPipe, 1) == -1) {
1375 execError("dup2", "job->outPipe");
1379 * The output channels are marked close on exec. This bit was
1380 * duplicated by the dup2(on some systems), so we have to clear
1381 * it before routing the shell's error output to the same place as
1382 * its standard output.
1384 (void)fcntl(1, F_SETFD, 0);
1385 if (dup2(1, 2) == -1) {
1386 execError("dup2", "1, 2");
1391 * We want to switch the child into a different process family so
1392 * we can kill it and all its descendants in one fell swoop,
1393 * by killing its process family, but not commit suicide.
1395 #if defined(HAVE_SETPGID)
1396 (void)setpgid(0, getpid());
1398 #if defined(HAVE_SETSID)
1399 /* XXX: dsl - I'm sure this should be setpgrp()... */
1402 (void)setpgrp(0, getpid());
1408 (void)execv(shellPath, argv);
1409 execError("exec", shellPath);
1413 /* Parent, continuing after the child exec */
1416 Trace_Log(JOBSTART, job);
1419 * Set the current position in the buffer to the beginning
1420 * and mark another stream to watch in the outputs mask
1426 if (job->cmdFILE != NULL && job->cmdFILE != stdout) {
1427 (void)fclose(job->cmdFILE);
1428 job->cmdFILE = NULL;
1432 * Now the job is actually running, add it to the table.
1435 fprintf(debug_file, "JobExec(%s): pid %d added to jobs table\n",
1436 job->node->name, job->pid);
1437 job_table_dump("job started");
1439 JobSigUnlock(&mask);
1443 *-----------------------------------------------------------------------
1445 * Create the argv needed to execute the shell for a given job.
1452 *-----------------------------------------------------------------------
1455 JobMakeArgv(Job *job, char **argv)
1458 static char args[10]; /* For merged arguments */
1460 argv[0] = UNCONST(shellName);
1463 if ((commandShell->exit && (*commandShell->exit != '-')) ||
1464 (commandShell->echo && (*commandShell->echo != '-')))
1467 * At least one of the flags doesn't have a minus before it, so
1468 * merge them together. Have to do this because the *(&(@*#*&#$#
1469 * Bourne shell thinks its second argument is a file to source.
1470 * Grrrr. Note the ten-character limitation on the combined arguments.
1472 (void)snprintf(args, sizeof(args), "-%s%s",
1473 ((job->flags & JOB_IGNERR) ? "" :
1474 (commandShell->exit ? commandShell->exit : "")),
1475 ((job->flags & JOB_SILENT) ? "" :
1476 (commandShell->echo ? commandShell->echo : "")));
1483 if (!(job->flags & JOB_IGNERR) && commandShell->exit) {
1484 argv[argc] = UNCONST(commandShell->exit);
1487 if (!(job->flags & JOB_SILENT) && commandShell->echo) {
1488 argv[argc] = UNCONST(commandShell->echo);
1496 *-----------------------------------------------------------------------
1498 * Start a target-creation process going for the target described
1499 * by the graph node gn.
1502 * gn target to create
1503 * flags flags for the job to override normal ones.
1504 * e.g. JOB_SPECIAL or JOB_IGNDOTS
1505 * previous The previous Job structure for this node, if any.
1508 * JOB_ERROR if there was an error in the commands, JOB_FINISHED
1509 * if there isn't actually anything left to do for the job and
1510 * JOB_RUNNING if the job has been started.
1513 * A new Job node is created and added to the list of running
1514 * jobs. PMake is forked and a child shell created.
1516 * NB: I'm fairly sure that this code is never called with JOB_SPECIAL set
1517 * JOB_IGNDOTS is never set (dsl)
1518 * Also the return value is ignored by everyone.
1519 *-----------------------------------------------------------------------
1522 JobStart(GNode *gn, int flags)
1524 Job *job; /* new job descriptor */
1525 char *argv[10]; /* Argument vector to shell */
1526 Boolean cmdsOK; /* true if the nodes commands were all right */
1527 Boolean noExec; /* Set true if we decide not to run the job */
1528 int tfd; /* File descriptor to the temp file */
1530 for (job = job_table; job < job_table_end; job++) {
1531 if (job->job_state == JOB_ST_FREE)
1534 if (job >= job_table_end)
1535 Punt("JobStart no job slots vacant");
1537 memset(job, 0, sizeof *job);
1538 job->job_state = JOB_ST_SETUP;
1539 if (gn->type & OP_SPECIAL)
1540 flags |= JOB_SPECIAL;
1543 job->tailCmds = NULL;
1546 * Set the initial value of the flags for this job based on the global
1547 * ones and the node's attributes... Any flags supplied by the caller
1548 * are also added to the field.
1551 if (Targ_Ignore(gn)) {
1552 job->flags |= JOB_IGNERR;
1554 if (Targ_Silent(gn)) {
1555 job->flags |= JOB_SILENT;
1557 job->flags |= flags;
1560 * Check the commands now so any attributes from .DEFAULT have a chance
1561 * to migrate to the node
1563 cmdsOK = Job_CheckCommands(gn, Error);
1565 job->inPollfd = NULL;
1567 * If the -n flag wasn't given, we open up OUR (not the child's)
1568 * temporary file to stuff commands in it. The thing is rd/wr so we don't
1569 * need to reopen it to feed it to the shell. If the -n flag *was* given,
1570 * we just set the file to be stdout. Cute, huh?
1572 if (((gn->type & OP_MAKE) && !(noRecursiveExecute)) ||
1573 (!noExecute && !touchFlag)) {
1575 * tfile is the name of a file into which all shell commands are
1576 * put. It is removed before the child shell is executed, unless
1577 * DEBUG(SCRIPT) is set.
1582 * We're serious here, but if the commands were bogus, we're
1586 PrintOnError(gn, NULL); /* provide some clue */
1591 tfd = mkTempFile(TMPPAT, &tfile);
1593 (void)eunlink(tfile);
1594 JobSigUnlock(&mask);
1596 job->cmdFILE = fdopen(tfd, "w+");
1597 if (job->cmdFILE == NULL) {
1598 Punt("Could not fdopen %s", tfile);
1600 (void)fcntl(FILENO(job->cmdFILE), F_SETFD, 1);
1602 * Send the commands to the command file, flush all its buffers then
1603 * rewind and remove the thing.
1609 meta_job_start(job, gn);
1610 if (Targ_Silent(gn)) { /* might have changed */
1611 job->flags |= JOB_SILENT;
1616 * We can do all the commands at once. hooray for sanity
1619 Lst_ForEach(gn->commands, JobPrintCommand, job);
1622 * If we didn't print out any commands to the shell script,
1623 * there's not much point in executing the shell, is there?
1625 if (numCommands == 0) {
1630 } else if (NoExecute(gn)) {
1632 * Not executing anything -- just print all the commands to stdout
1633 * in one fell swoop. This will still set up job->tailCmds correctly.
1635 if (lastNode != gn) {
1636 MESSAGE(stdout, gn);
1639 job->cmdFILE = stdout;
1641 * Only print the commands if they're ok, but don't die if they're
1642 * not -- just let the user know they're bad and keep going. It
1643 * doesn't do any harm in this case and may do some good.
1646 Lst_ForEach(gn->commands, JobPrintCommand, job);
1649 * Don't execute the shell, thank you.
1654 * Just touch the target and note that no shell should be executed.
1655 * Set cmdFILE to stdout to make life easier. Check the commands, too,
1656 * but don't die if they're no good -- it does no harm to keep working
1659 job->cmdFILE = stdout;
1660 Job_Touch(gn, job->flags&JOB_SILENT);
1663 /* Just in case it isn't already... */
1664 (void)fflush(job->cmdFILE);
1667 * If we're not supposed to execute a shell, don't.
1670 if (!(job->flags & JOB_SPECIAL))
1673 * Unlink and close the command file if we opened one
1675 if (job->cmdFILE != stdout) {
1676 if (job->cmdFILE != NULL) {
1677 (void)fclose(job->cmdFILE);
1678 job->cmdFILE = NULL;
1683 * We only want to work our way up the graph if we aren't here because
1684 * the commands for the job were no good.
1686 if (cmdsOK && aborting == 0) {
1687 if (job->tailCmds != NULL) {
1688 Lst_ForEachFrom(job->node->commands, job->tailCmds,
1692 job->node->made = MADE;
1693 Make_Update(job->node);
1695 job->job_state = JOB_ST_FREE;
1696 return cmdsOK ? JOB_FINISHED : JOB_ERROR;
1700 * Set up the control arguments to the shell. This is based on the flags
1701 * set earlier for this job.
1703 JobMakeArgv(job, argv);
1705 /* Create the pipe by which we'll get the shell's output. */
1706 JobCreatePipe(job, 3);
1709 return(JOB_RUNNING);
1713 JobOutput(Job *job, char *cp, char *endp, int msg)
1717 if (commandShell->noPrint) {
1718 ecp = Str_FindSubstring(cp, commandShell->noPrint);
1719 while (ecp != NULL) {
1722 if (!beSilent && msg && job->node != lastNode) {
1723 MESSAGE(stdout, job->node);
1724 lastNode = job->node;
1727 * The only way there wouldn't be a newline after
1728 * this line is if it were the last in the buffer.
1729 * however, since the non-printable comes after it,
1730 * there must be a newline, so we don't print one.
1732 (void)fprintf(stdout, "%s", cp);
1733 (void)fflush(stdout);
1735 cp = ecp + commandShell->noPLen;
1738 * Still more to print, look again after skipping
1739 * the whitespace following the non-printable
1743 while (*cp == ' ' || *cp == '\t' || *cp == '\n') {
1746 ecp = Str_FindSubstring(cp, commandShell->noPrint);
1756 *-----------------------------------------------------------------------
1758 * This function is called at different times depending on
1759 * whether the user has specified that output is to be collected
1760 * via pipes or temporary files. In the former case, we are called
1761 * whenever there is something to read on the pipe. We collect more
1762 * output from the given job and store it in the job's outBuf. If
1763 * this makes up a line, we print it tagged by the job's identifier,
1765 * If output has been collected in a temporary file, we open the
1766 * file and read it line by line, transfering it to our own
1767 * output channel until the file is empty. At which point we
1768 * remove the temporary file.
1769 * In both cases, however, we keep our figurative eye out for the
1770 * 'noPrint' line for the shell from which the output came. If
1771 * we recognize a line, we don't print it. If the command is not
1772 * alone on the line (the character after it is not \0 or \n), we
1773 * do print whatever follows it.
1776 * job the job whose output needs printing
1777 * finish TRUE if this is the last time we'll be called
1784 * curPos may be shifted as may the contents of outBuf.
1785 *-----------------------------------------------------------------------
1788 JobDoOutput(Job *job, Boolean finish)
1790 Boolean gotNL = FALSE; /* true if got a newline */
1791 Boolean fbuf; /* true if our buffer filled up */
1792 int nr; /* number of bytes read */
1793 int i; /* auxiliary index into outBuf */
1794 int max; /* limit for i (end of current data) */
1795 int nRead; /* (Temporary) number of bytes read */
1798 * Read as many bytes as will fit in the buffer.
1804 nRead = read(job->inPipe, &job->outBuf[job->curPos],
1805 JOB_BUFSIZE - job->curPos);
1807 if (errno == EAGAIN)
1810 perror("JobDoOutput(piperead)");
1818 * If we hit the end-of-file (the job is dead), we must flush its
1819 * remaining output, so pretend we read a newline if there's any
1820 * output remaining in the buffer.
1821 * Also clear the 'finish' flag so we stop looping.
1823 if ((nr == 0) && (job->curPos != 0)) {
1824 job->outBuf[job->curPos] = '\n';
1827 } else if (nr == 0) {
1832 * Look for the last newline in the bytes we just got. If there is
1833 * one, break out of the loop with 'i' as its index and gotNL set
1836 max = job->curPos + nr;
1837 for (i = job->curPos + nr - 1; i >= job->curPos; i--) {
1838 if (job->outBuf[i] == '\n') {
1841 } else if (job->outBuf[i] == '\0') {
1845 job->outBuf[i] = ' ';
1851 if (job->curPos == JOB_BUFSIZE) {
1853 * If we've run out of buffer space, we have no choice
1854 * but to print the stuff. sigh.
1860 if (gotNL || fbuf) {
1862 * Need to send the output to the screen. Null terminate it
1863 * first, overwriting the newline character if there was one.
1864 * So long as the line isn't one we should filter (according
1865 * to the shell description), we print the line, preceded
1866 * by a target banner if this target isn't the same as the
1867 * one for which we last printed something.
1868 * The rest of the data in the buffer are then shifted down
1869 * to the start of the buffer and curPos is set accordingly.
1871 job->outBuf[i] = '\0';
1872 if (i >= job->curPos) {
1875 cp = JobOutput(job, job->outBuf, &job->outBuf[i], FALSE);
1878 * There's still more in that thar buffer. This time, though,
1879 * we know there's no newline at the end, so we add one of
1880 * our own free will.
1883 if (!beSilent && job->node != lastNode) {
1884 MESSAGE(stdout, job->node);
1885 lastNode = job->node;
1889 meta_job_output(job, cp, gotNL ? "\n" : "");
1892 (void)fprintf(stdout, "%s%s", cp, gotNL ? "\n" : "");
1893 (void)fflush(stdout);
1897 /* shift the remaining characters down */
1898 (void)memcpy(job->outBuf, &job->outBuf[i + 1], max - (i + 1));
1899 job->curPos = max - (i + 1);
1903 * We have written everything out, so we just start over
1904 * from the start of the buffer. No copying. No nothing.
1911 * If the finish flag is true, we must loop until we hit
1912 * end-of-file on the pipe. This is guaranteed to happen
1913 * eventually since the other end of the pipe is now closed
1914 * (we closed it explicitly and the child has exited). When
1915 * we do get an EOF, finish will be set FALSE and we'll fall
1927 * Unfortunately it is too complicated to run .BEGIN, .END,
1928 * and .INTERRUPT job in the parallel job module. This has
1929 * the nice side effect that it avoids a lot of other problems.
1931 Lst lst = Lst_Init(FALSE);
1932 Lst_AtEnd(lst, targ);
1933 (void)Make_Run(lst);
1934 Lst_Destroy(lst, NULL);
1935 JobStart(targ, JOB_SPECIAL);
1936 while (jobTokensRunning) {
1940 Compat_Make(targ, targ);
1941 if (targ->made == ERROR) {
1942 PrintOnError(targ, "\n\nStop.");
1949 *-----------------------------------------------------------------------
1950 * Job_CatchChildren --
1951 * Handle the exit of a child. Called from Make_Make.
1954 * block TRUE if should block on the wait
1960 * The job descriptor is removed from the list of children.
1963 * We do waits, blocking or not, according to the wisdom of our
1964 * caller, until there are no more children to report. For each
1965 * job, call JobFinish to finish things off.
1967 *-----------------------------------------------------------------------
1971 Job_CatchChildren(void)
1973 int pid; /* pid of dead child */
1974 WAIT_T status; /* Exit/termination status */
1977 * Don't even bother if we know there's no one around.
1979 if (jobTokensRunning == 0)
1982 while ((pid = waitpid((pid_t) -1, &status, WNOHANG | WUNTRACED)) > 0) {
1984 (void)fprintf(debug_file, "Process %d exited/stopped status %x.\n", pid,
1985 WAIT_STATUS(status));
1987 JobReapChild(pid, status, TRUE);
1992 * It is possible that wait[pid]() was called from elsewhere,
1993 * this lets us reap jobs regardless.
1996 JobReapChild(pid_t pid, WAIT_T status, Boolean isJobs)
1998 Job *job; /* job descriptor for dead child */
2001 * Don't even bother if we know there's no one around.
2003 if (jobTokensRunning == 0)
2006 job = JobFindPid(pid, JOB_ST_RUNNING, isJobs);
2009 if (!lurking_children)
2010 Error("Child (%d) status %x not in table?", pid, status);
2012 return; /* not ours */
2014 if (WIFSTOPPED(status)) {
2016 (void)fprintf(debug_file, "Process %d (%s) stopped.\n",
2017 job->pid, job->node->name);
2019 if (!make_suspended) {
2020 switch (WSTOPSIG(status)) {
2022 (void)printf("*** [%s] Suspended\n", job->node->name);
2025 (void)printf("*** [%s] Stopped\n", job->node->name);
2028 (void)printf("*** [%s] Stopped -- signal %d\n",
2029 job->node->name, WSTOPSIG(status));
2031 job->job_suspended = 1;
2033 (void)fflush(stdout);
2037 job->job_state = JOB_ST_FINISHED;
2038 job->exit_status = WAIT_STATUS(status);
2040 JobFinish(job, status);
2044 *-----------------------------------------------------------------------
2045 * Job_CatchOutput --
2046 * Catch the output from our children, if we're using
2047 * pipes do so. Otherwise just block time until we get a
2048 * signal(most likely a SIGCHLD) since there's no point in
2049 * just spinning when there's nothing to do and the reaping
2050 * of a child can wait for a while.
2056 * Output is read from pipes if we're piping.
2057 * -----------------------------------------------------------------------
2060 Job_CatchOutput(void)
2066 (void)fflush(stdout);
2068 /* The first fd in the list is the job token pipe */
2070 nready = poll(fds + 1 - wantToken, nfds - 1 + wantToken, POLL_MSEC);
2071 } while (nready < 0 && errno == EINTR);
2074 Punt("poll: %s", strerror(errno));
2076 if (nready > 0 && readyfd(&childExitJob)) {
2079 count = read(childExitJob.inPipe, &token, 1);
2082 Punt("unexpected eof on token pipe");
2084 Punt("token pipe read: %s", strerror(errno));
2086 if (token == DO_JOB_RESUME[0])
2087 /* Complete relay requested from our SIGCONT handler */
2096 Job_CatchChildren();
2100 for (i = 2; i < nfds; i++) {
2101 if (!fds[i].revents)
2104 if (job->job_state == JOB_ST_RUNNING)
2105 JobDoOutput(job, FALSE);
2112 *-----------------------------------------------------------------------
2114 * Start the creation of a target. Basically a front-end for
2115 * JobStart used by the Make module.
2121 * Another job is started.
2123 *-----------------------------------------------------------------------
2128 (void)JobStart(gn, 0);
2134 if (shellPath == NULL) {
2136 * We are using the default shell, which may be an absolute
2137 * path if DEFSHELL_CUSTOM is defined.
2139 shellName = commandShell->name;
2140 #ifdef DEFSHELL_CUSTOM
2141 if (*shellName == '/') {
2142 shellPath = shellName;
2143 shellName = strrchr(shellPath, '/');
2147 shellPath = str_concat(_PATH_DEFSHELLDIR, shellName, STR_ADDSLASH);
2149 if (commandShell->exit == NULL) {
2150 commandShell->exit = "";
2152 if (commandShell->echo == NULL) {
2153 commandShell->echo = "";
2158 * Returns the string literal that is used in the current command shell
2159 * to produce a newline character.
2162 Shell_GetNewline(void)
2165 return commandShell->newline;
2174 } else if (!Var_Exists(MAKE_JOB_PREFIX, VAR_GLOBAL)) {
2175 Var_Set(MAKE_JOB_PREFIX, "---", VAR_GLOBAL, 0);
2178 targPrefix = Var_Subst(NULL, "${" MAKE_JOB_PREFIX "}", VAR_GLOBAL, 0);
2182 *-----------------------------------------------------------------------
2184 * Initialize the process module
2192 * lists and counters are initialized
2193 *-----------------------------------------------------------------------
2198 /* Allocate space for all the job info */
2199 job_table = bmake_malloc(maxJobs * sizeof *job_table);
2200 memset(job_table, 0, maxJobs * sizeof *job_table);
2201 job_table_end = job_table + maxJobs;
2210 * There is a non-zero chance that we already have children.
2211 * eg after 'make -f- <<EOF'
2212 * Since their termination causes a 'Child (pid) not in table' message,
2213 * Collect the status of any that are already dead, and suppress the
2214 * error message if there are any undead ones.
2218 rval = waitpid((pid_t) -1, &status, WNOHANG);
2222 lurking_children = 1;
2228 JobCreatePipe(&childExitJob, 3);
2230 /* We can only need to wait for tokens, children and output from each job */
2231 fds = bmake_malloc(sizeof (*fds) * (2 + maxJobs));
2232 jobfds = bmake_malloc(sizeof (*jobfds) * (2 + maxJobs));
2234 /* These are permanent entries and take slots 0 and 1 */
2235 watchfd(&tokenWaitJob);
2236 watchfd(&childExitJob);
2238 sigemptyset(&caught_signals);
2240 * Install a SIGCHLD handler.
2242 (void)bmake_signal(SIGCHLD, JobChildSig);
2243 sigaddset(&caught_signals, SIGCHLD);
2245 #define ADDSIG(s,h) \
2246 if (bmake_signal(s, SIG_IGN) != SIG_IGN) { \
2247 sigaddset(&caught_signals, s); \
2248 (void)bmake_signal(s, h); \
2252 * Catch the four signals that POSIX specifies if they aren't ignored.
2253 * JobPassSig will take care of calling JobInterrupt if appropriate.
2255 ADDSIG(SIGINT, JobPassSig_int)
2256 ADDSIG(SIGHUP, JobPassSig_term)
2257 ADDSIG(SIGTERM, JobPassSig_term)
2258 ADDSIG(SIGQUIT, JobPassSig_term)
2261 * There are additional signals that need to be caught and passed if
2262 * either the export system wants to be told directly of signals or if
2263 * we're giving each job its own process group (since then it won't get
2264 * signals from the terminal driver as we own the terminal)
2266 ADDSIG(SIGTSTP, JobPassSig_suspend)
2267 ADDSIG(SIGTTOU, JobPassSig_suspend)
2268 ADDSIG(SIGTTIN, JobPassSig_suspend)
2269 ADDSIG(SIGWINCH, JobCondPassSig)
2270 ADDSIG(SIGCONT, JobContinueSig)
2273 (void)Job_RunTarget(".BEGIN", NULL);
2274 postCommands = Targ_FindNode(".END", TARG_CREATE);
2277 static void JobSigReset(void)
2280 if (sigismember(&caught_signals, s)) { \
2281 (void)bmake_signal(s, SIG_DFL); \
2294 (void)bmake_signal(SIGCHLD, SIG_DFL);
2298 *-----------------------------------------------------------------------
2300 * Find a shell in 'shells' given its name.
2303 * A pointer to the Shell structure.
2308 *-----------------------------------------------------------------------
2311 JobMatchShell(const char *name)
2315 for (sh = shells; sh->name != NULL; sh++) {
2316 if (strcmp(name, sh->name) == 0)
2323 *-----------------------------------------------------------------------
2325 * Parse a shell specification and set up commandShell, shellPath
2326 * and shellName appropriately.
2329 * line The shell spec
2332 * FAILURE if the specification was incorrect.
2335 * commandShell points to a Shell structure (either predefined or
2336 * created from the shell spec), shellPath is the full path of the
2337 * shell described by commandShell, while shellName is just the
2338 * final component of shellPath.
2341 * A shell specification consists of a .SHELL target, with dependency
2342 * operator, followed by a series of blank-separated words. Double
2343 * quotes can be used to use blanks in words. A backslash escapes
2344 * anything (most notably a double-quote and a space) and
2345 * provides the functionality it does in C. Each word consists of
2346 * keyword and value separated by an equal sign. There should be no
2347 * unnecessary spaces in the word. The keywords are as follows:
2348 * name Name of shell.
2349 * path Location of shell.
2350 * quiet Command to turn off echoing.
2351 * echo Command to turn echoing on
2352 * filter Result of turning off echoing that shouldn't be
2354 * echoFlag Flag to turn echoing on at the start
2355 * errFlag Flag to turn error checking on at the start
2356 * hasErrCtl True if shell has error checking control
2357 * newline String literal to represent a newline char
2358 * check Command to turn on error checking if hasErrCtl
2359 * is TRUE or template of command to echo a command
2360 * for which error checking is off if hasErrCtl is
2362 * ignore Command to turn off error checking if hasErrCtl
2363 * is TRUE or template of command to execute a
2364 * command so as to ignore any errors it returns if
2365 * hasErrCtl is FALSE.
2367 *-----------------------------------------------------------------------
2370 Job_ParseShell(char *line)
2377 Boolean fullSpec = FALSE;
2380 while (isspace((unsigned char)*line)) {
2385 free(UNCONST(shellArgv));
2387 memset(&newShell, 0, sizeof(newShell));
2390 * Parse the specification by keyword
2392 words = brk_string(line, &argc, TRUE, &path);
2393 if (words == NULL) {
2394 Error("Unterminated quoted string [%s]", line);
2399 for (path = NULL, argv = words; argc != 0; argc--, argv++) {
2400 if (strncmp(*argv, "path=", 5) == 0) {
2402 } else if (strncmp(*argv, "name=", 5) == 0) {
2403 newShell.name = &argv[0][5];
2405 if (strncmp(*argv, "quiet=", 6) == 0) {
2406 newShell.echoOff = &argv[0][6];
2407 } else if (strncmp(*argv, "echo=", 5) == 0) {
2408 newShell.echoOn = &argv[0][5];
2409 } else if (strncmp(*argv, "filter=", 7) == 0) {
2410 newShell.noPrint = &argv[0][7];
2411 newShell.noPLen = strlen(newShell.noPrint);
2412 } else if (strncmp(*argv, "echoFlag=", 9) == 0) {
2413 newShell.echo = &argv[0][9];
2414 } else if (strncmp(*argv, "errFlag=", 8) == 0) {
2415 newShell.exit = &argv[0][8];
2416 } else if (strncmp(*argv, "hasErrCtl=", 10) == 0) {
2417 char c = argv[0][10];
2418 newShell.hasErrCtl = !((c != 'Y') && (c != 'y') &&
2419 (c != 'T') && (c != 't'));
2420 } else if (strncmp(*argv, "newline=", 8) == 0) {
2421 newShell.newline = &argv[0][8];
2422 } else if (strncmp(*argv, "check=", 6) == 0) {
2423 newShell.errCheck = &argv[0][6];
2424 } else if (strncmp(*argv, "ignore=", 7) == 0) {
2425 newShell.ignErr = &argv[0][7];
2426 } else if (strncmp(*argv, "errout=", 7) == 0) {
2427 newShell.errOut = &argv[0][7];
2428 } else if (strncmp(*argv, "comment=", 8) == 0) {
2429 newShell.commentChar = argv[0][8];
2431 Parse_Error(PARSE_FATAL, "Unknown keyword \"%s\"",
2442 * If no path was given, the user wants one of the pre-defined shells,
2443 * yes? So we find the one s/he wants with the help of JobMatchShell
2444 * and set things up the right way. shellPath will be set up by
2447 if (newShell.name == NULL) {
2448 Parse_Error(PARSE_FATAL, "Neither path nor name specified");
2452 if ((sh = JobMatchShell(newShell.name)) == NULL) {
2453 Parse_Error(PARSE_WARNING, "%s: No matching shell",
2459 shellName = newShell.name;
2461 /* Shell_Init has already been called! Do it again. */
2462 free(UNCONST(shellPath));
2469 * The user provided a path. If s/he gave nothing else (fullSpec is
2470 * FALSE), try and find a matching shell in the ones we know of.
2471 * Else we just take the specification at its word and copy it
2472 * to a new location. In either case, we need to record the
2473 * path the user gave for the shell.
2476 path = strrchr(path, '/');
2478 path = UNCONST(shellPath);
2482 if (newShell.name != NULL) {
2483 shellName = newShell.name;
2488 if ((sh = JobMatchShell(shellName)) == NULL) {
2489 Parse_Error(PARSE_WARNING, "%s: No matching shell",
2496 commandShell = bmake_malloc(sizeof(Shell));
2497 *commandShell = newShell;
2501 if (commandShell->echoOn && commandShell->echoOff) {
2502 commandShell->hasEchoCtl = TRUE;
2505 if (!commandShell->hasErrCtl) {
2506 if (commandShell->errCheck == NULL) {
2507 commandShell->errCheck = "";
2509 if (commandShell->ignErr == NULL) {
2510 commandShell->ignErr = "%s\n";
2515 * Do not free up the words themselves, since they might be in use by the
2516 * shell specification.
2523 *-----------------------------------------------------------------------
2525 * Handle the receipt of an interrupt.
2528 * runINTERRUPT Non-zero if commands for the .INTERRUPT target
2529 * should be executed
2530 * signo signal received
2536 * All children are killed. Another job will be started if the
2537 * .INTERRUPT target was given.
2538 *-----------------------------------------------------------------------
2541 JobInterrupt(int runINTERRUPT, int signo)
2543 Job *job; /* job descriptor in that element */
2544 GNode *interrupt; /* the node describing the .INTERRUPT target */
2548 aborting = ABORT_INTERRUPT;
2552 for (job = job_table; job < job_table_end; job++) {
2553 if (job->job_state != JOB_ST_RUNNING)
2558 if ((gn->type & (OP_JOIN|OP_PHONY)) == 0 && !Targ_Precious(gn)) {
2559 char *file = (gn->path == NULL ? gn->name : gn->path);
2560 if (!noExecute && eunlink(file) != -1) {
2561 Error("*** %s removed", file);
2566 (void)fprintf(debug_file,
2567 "JobInterrupt passing signal %d to child %d.\n",
2570 KILLPG(job->pid, signo);
2574 JobSigUnlock(&mask);
2576 if (runINTERRUPT && !touchFlag) {
2577 interrupt = Targ_FindNode(".INTERRUPT", TARG_NOCREATE);
2578 if (interrupt != NULL) {
2579 ignoreErrors = FALSE;
2583 Trace_Log(MAKEINTR, 0);
2588 *-----------------------------------------------------------------------
2590 * Do final processing such as the running of the commands
2591 * attached to the .END target.
2594 * Number of errors reported.
2598 *-----------------------------------------------------------------------
2603 if (postCommands != NULL &&
2604 (!Lst_IsEmpty(postCommands->commands) ||
2605 !Lst_IsEmpty(postCommands->children))) {
2607 Error("Errors reported so .END ignored");
2609 JobRun(postCommands);
2616 *-----------------------------------------------------------------------
2618 * Cleanup any memory used by the jobs module
2625 *-----------------------------------------------------------------------
2637 *-----------------------------------------------------------------------
2639 * Waits for all running jobs to finish and returns. Sets 'aborting'
2640 * to ABORT_WAIT to prevent other jobs from starting.
2646 * Currently running jobs finish.
2648 *-----------------------------------------------------------------------
2653 aborting = ABORT_WAIT;
2654 while (jobTokensRunning != 0) {
2661 *-----------------------------------------------------------------------
2663 * Abort all currently running jobs without handling output or anything.
2664 * This function is to be called only in the event of a major
2665 * error. Most definitely NOT to be called from JobInterrupt.
2671 * All children are killed, not just the firstborn
2672 *-----------------------------------------------------------------------
2677 Job *job; /* the job descriptor in that element */
2680 aborting = ABORT_ERROR;
2682 if (jobTokensRunning) {
2683 for (job = job_table; job < job_table_end; job++) {
2684 if (job->job_state != JOB_ST_RUNNING)
2687 * kill the child process with increasingly drastic signals to make
2688 * darn sure it's dead.
2690 KILLPG(job->pid, SIGINT);
2691 KILLPG(job->pid, SIGKILL);
2696 * Catch as many children as want to report in at first, then give up
2698 while (waitpid((pid_t) -1, &foo, WNOHANG) > 0)
2704 *-----------------------------------------------------------------------
2706 * Tries to restart stopped jobs if there are slots available.
2707 * Called in process context in response to a SIGCONT.
2715 *-----------------------------------------------------------------------
2718 JobRestartJobs(void)
2722 for (job = job_table; job < job_table_end; job++) {
2723 if (job->job_state == JOB_ST_RUNNING &&
2724 (make_suspended || job->job_suspended)) {
2726 (void)fprintf(debug_file, "Restarting stopped job pid %d.\n",
2729 if (job->job_suspended) {
2730 (void)printf("*** [%s] Continued\n", job->node->name);
2731 (void)fflush(stdout);
2733 job->job_suspended = 0;
2734 if (KILLPG(job->pid, SIGCONT) != 0 && DEBUG(JOB)) {
2735 fprintf(debug_file, "Failed to send SIGCONT to %d\n", job->pid);
2738 if (job->job_state == JOB_ST_FINISHED)
2739 /* Job exit deferred after calling waitpid() in a signal handler */
2740 JobFinish(job, job->exit_status);
2748 if (job->inPollfd != NULL)
2749 Punt("Watching watched job");
2751 fds[nfds].fd = job->inPipe;
2752 fds[nfds].events = POLLIN;
2754 job->inPollfd = &fds[nfds];
2762 if (job->inPollfd == NULL)
2763 Punt("Unwatching unwatched job");
2764 i = job->inPollfd - fds;
2767 * Move last job in table into hole made by dead job.
2771 jobfds[i] = jobfds[nfds];
2772 jobfds[i]->inPollfd = &fds[i];
2774 job->inPollfd = NULL;
2780 if (job->inPollfd == NULL)
2781 Punt("Polling unwatched job");
2782 return (job->inPollfd->revents & POLLIN) != 0;
2786 *-----------------------------------------------------------------------
2788 * Put a token into the job pipe so that some make process can start
2792 * Allows more build jobs to be spawned somewhere.
2794 *-----------------------------------------------------------------------
2800 char tok = JOB_TOKENS[aborting], tok1;
2802 /* If we are depositing an error token flush everything else */
2803 while (tok != '+' && read(tokenWaitJob.inPipe, &tok1, 1) == 1)
2807 fprintf(debug_file, "(%d) aborting %d, deposit token %c\n",
2808 getpid(), aborting, JOB_TOKENS[aborting]);
2809 while (write(tokenWaitJob.outPipe, &tok, 1) == -1 && errno == EAGAIN)
2814 *-----------------------------------------------------------------------
2815 * Job_ServerStartTokenAdd --
2816 * Prep the job token pipe in the root make process.
2818 *-----------------------------------------------------------------------
2822 Job_ServerStart(int max_tokens, int jp_0, int jp_1)
2827 if (jp_0 >= 0 && jp_1 >= 0) {
2828 /* Pipe passed in from parent */
2829 tokenWaitJob.inPipe = jp_0;
2830 tokenWaitJob.outPipe = jp_1;
2834 JobCreatePipe(&tokenWaitJob, 15);
2836 snprintf(jobarg, sizeof(jobarg), "%d,%d",
2837 tokenWaitJob.inPipe, tokenWaitJob.outPipe);
2839 Var_Append(MAKEFLAGS, "-J", VAR_GLOBAL);
2840 Var_Append(MAKEFLAGS, jobarg, VAR_GLOBAL);
2843 * Preload the job pipe with one token per job, save the one
2844 * "extra" token for the primary job.
2846 * XXX should clip maxJobs against PIPE_BUF -- if max_tokens is
2847 * larger than the write buffer size of the pipe, we will
2850 for (i = 1; i < max_tokens; i++)
2855 *-----------------------------------------------------------------------
2856 * Job_TokenReturn --
2857 * Return a withdrawn token to the pool.
2859 *-----------------------------------------------------------------------
2863 Job_TokenReturn(void)
2866 if (jobTokensRunning < 0)
2867 Punt("token botch");
2868 if (jobTokensRunning || JOB_TOKENS[aborting] != '+')
2873 *-----------------------------------------------------------------------
2874 * Job_TokenWithdraw --
2875 * Attempt to withdraw a token from the pool.
2878 * Returns TRUE if a token was withdrawn, and FALSE if the pool
2879 * is currently empty.
2882 * If pool is empty, set wantToken so that we wake up
2883 * when a token is released.
2885 *-----------------------------------------------------------------------
2890 Job_TokenWithdraw(void)
2897 fprintf(debug_file, "Job_TokenWithdraw(%d): aborting %d, running %d\n",
2898 getpid(), aborting, jobTokensRunning);
2900 if (aborting || (jobTokensRunning >= maxJobs))
2903 count = read(tokenWaitJob.inPipe, &tok, 1);
2905 Fatal("eof on job pipe!");
2906 if (count < 0 && jobTokensRunning != 0) {
2907 if (errno != EAGAIN) {
2908 Fatal("job pipe read: %s", strerror(errno));
2911 fprintf(debug_file, "(%d) blocked for token\n", getpid());
2916 if (count == 1 && tok != '+') {
2917 /* make being abvorted - remove any other job tokens */
2919 fprintf(debug_file, "(%d) aborted by token %c\n", getpid(), tok);
2920 while (read(tokenWaitJob.inPipe, &tok1, 1) == 1)
2922 /* And put the stopper back */
2923 while (write(tokenWaitJob.outPipe, &tok, 1) == -1 && errno == EAGAIN)
2925 Fatal("A failure has been detected in another branch of the parallel make");
2928 if (count == 1 && jobTokensRunning == 0)
2929 /* We didn't want the token really */
2930 while (write(tokenWaitJob.outPipe, &tok, 1) == -1 && errno == EAGAIN)
2935 fprintf(debug_file, "(%d) withdrew token\n", getpid());
2940 *-----------------------------------------------------------------------
2942 * Run the named target if found. If a filename is specified, then
2943 * set that to the sources.
2949 * exits if the target fails.
2951 *-----------------------------------------------------------------------
2954 Job_RunTarget(const char *target, const char *fname) {
2955 GNode *gn = Targ_FindNode(target, TARG_NOCREATE);
2961 Var_Set(ALLSRC, fname, gn, 0);
2964 if (gn->made == ERROR) {
2965 PrintOnError(gn, "\n\nStop.");
2973 emul_poll(struct pollfd *fd, int nfd, int timeout)
2976 int i, maxfd, nselect, npoll;
2977 struct timeval tv, *tvp;
2984 for (i = 0; i < nfd; i++) {
2987 if (fd[i].events & POLLIN)
2988 FD_SET(fd[i].fd, &rfds);
2990 if (fd[i].events & POLLOUT)
2991 FD_SET(fd[i].fd, &wfds);
2993 if (fd[i].fd > maxfd)
2997 if (maxfd >= FD_SETSIZE) {
2998 Punt("Ran out of fd_set slots; "
2999 "recompile with a larger FD_SETSIZE.");
3005 usecs = timeout * 1000;
3006 tv.tv_sec = usecs / 1000000;
3007 tv.tv_usec = usecs % 1000000;
3011 nselect = select(maxfd + 1, &rfds, &wfds, 0, tvp);
3017 for (i = 0; i < nfd; i++) {
3018 if (FD_ISSET(fd[i].fd, &rfds))
3019 fd[i].revents |= POLLIN;
3021 if (FD_ISSET(fd[i].fd, &wfds))
3022 fd[i].revents |= POLLOUT;
3030 #endif /* USE_SELECT */