1 /* $NetBSD: job.c,v 1.188 2016/08/26 23:28:39 dholland 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 1.188 2016/08/26 23:28:39 dholland Exp $";
75 #include <sys/cdefs.h>
78 static char sccsid[] = "@(#)job.c 8.2 (Berkeley) 3/19/94";
80 __RCSID("$NetBSD: job.c,v 1.188 2016/08/26 23:28:39 dholland 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 * Delete the target of a failed, interrupted, or otherwise
408 * unsuccessful job unless inhibited by .PRECIOUS.
411 JobDeleteTarget(GNode *gn)
413 if ((gn->type & (OP_JOIN|OP_PHONY)) == 0 && !Targ_Precious(gn)) {
414 char *file = (gn->path == NULL ? gn->name : gn->path);
415 if (!noExecute && eunlink(file) != -1) {
416 Error("*** %s removed", file);
422 * JobSigLock/JobSigUnlock
424 * Signal lock routines to get exclusive access. Currently used to
425 * protect `jobs' and `stoppedJobs' list manipulations.
427 static void JobSigLock(sigset_t *omaskp)
429 if (sigprocmask(SIG_BLOCK, &caught_signals, omaskp) != 0) {
430 Punt("JobSigLock: sigprocmask: %s", strerror(errno));
435 static void JobSigUnlock(sigset_t *omaskp)
437 (void)sigprocmask(SIG_SETMASK, omaskp, NULL);
441 JobCreatePipe(Job *job, int minfd)
445 if (pipe(job->jobPipe) == -1)
446 Punt("Cannot create pipe: %s", strerror(errno));
448 for (i = 0; i < 2; i++) {
449 /* Avoid using low numbered fds */
450 fd = fcntl(job->jobPipe[i], F_DUPFD, minfd);
452 close(job->jobPipe[i]);
453 job->jobPipe[i] = fd;
457 /* Set close-on-exec flag for both */
458 (void)fcntl(job->jobPipe[0], F_SETFD, FD_CLOEXEC);
459 (void)fcntl(job->jobPipe[1], F_SETFD, FD_CLOEXEC);
462 * We mark the input side of the pipe non-blocking; we poll(2) the
463 * pipe when we're waiting for a job token, but we might lose the
464 * race for the token when a new one becomes available, so the read
465 * from the pipe should not block.
467 fcntl(job->jobPipe[0], F_SETFL,
468 fcntl(job->jobPipe[0], F_GETFL, 0) | O_NONBLOCK);
472 *-----------------------------------------------------------------------
474 * Pass a signal to a job
477 * signop Signal to send it
480 * None, except the job may bite it.
482 *-----------------------------------------------------------------------
485 JobCondPassSig(int signo)
490 (void)fprintf(debug_file, "JobCondPassSig(%d) called.\n", signo);
493 for (job = job_table; job < job_table_end; job++) {
494 if (job->job_state != JOB_ST_RUNNING)
497 (void)fprintf(debug_file,
498 "JobCondPassSig passing signal %d to child %d.\n",
501 KILLPG(job->pid, signo);
506 *-----------------------------------------------------------------------
511 * signo The signal number we've received
517 * Sends a token on the child exit pipe to wake us up from
520 *-----------------------------------------------------------------------
523 JobChildSig(int signo MAKE_ATTR_UNUSED)
525 while (write(childExitJob.outPipe, CHILD_EXIT, 1) == -1 && errno == EAGAIN)
531 *-----------------------------------------------------------------------
533 * Resume all stopped jobs.
536 * signo The signal number we've received
542 * Jobs start running again.
544 *-----------------------------------------------------------------------
547 JobContinueSig(int signo MAKE_ATTR_UNUSED)
550 * Defer sending to SIGCONT to our stopped children until we return
551 * from the signal handler.
553 while (write(childExitJob.outPipe, DO_JOB_RESUME, 1) == -1 &&
559 *-----------------------------------------------------------------------
561 * Pass a signal on to all jobs, then resend to ourselves.
564 * signo The signal number we've received
570 * We die by the same signal.
572 *-----------------------------------------------------------------------
574 MAKE_ATTR_DEAD static void
575 JobPassSig_int(int signo)
577 /* Run .INTERRUPT target then exit */
578 JobInterrupt(TRUE, signo);
581 MAKE_ATTR_DEAD static void
582 JobPassSig_term(int signo)
584 /* Dont run .INTERRUPT target then exit */
585 JobInterrupt(FALSE, signo);
589 JobPassSig_suspend(int signo)
591 sigset_t nmask, omask;
592 struct sigaction act;
594 /* Suppress job started/continued messages */
597 /* Pass the signal onto every job */
598 JobCondPassSig(signo);
601 * Send ourselves the signal now we've given the message to everyone else.
602 * Note we block everything else possible while we're getting the signal.
603 * This ensures that all our jobs get continued when we wake up before
604 * we take any other signal.
607 sigdelset(&nmask, signo);
608 (void)sigprocmask(SIG_SETMASK, &nmask, &omask);
610 act.sa_handler = SIG_DFL;
611 sigemptyset(&act.sa_mask);
613 (void)sigaction(signo, &act, NULL);
616 (void)fprintf(debug_file,
617 "JobPassSig passing signal %d to self.\n", signo);
620 (void)kill(getpid(), signo);
623 * We've been continued.
625 * A whole host of signals continue to happen!
626 * SIGCHLD for any processes that actually suspended themselves.
627 * SIGCHLD for any processes that exited while we were alseep.
628 * The SIGCONT that actually caused us to wakeup.
630 * Since we defer passing the SIGCONT on to our children until
631 * the main processing loop, we can be sure that all the SIGCHLD
632 * events will have happened by then - and that the waitpid() will
633 * collect the child 'suspended' events.
634 * For correct sequencing we just need to ensure we process the
635 * waitpid() before passign on the SIGCONT.
637 * In any case nothing else is needed here.
640 /* Restore handler and signal mask */
641 act.sa_handler = JobPassSig_suspend;
642 (void)sigaction(signo, &act, NULL);
643 (void)sigprocmask(SIG_SETMASK, &omask, NULL);
647 *-----------------------------------------------------------------------
649 * Compare the pid of the job with the given pid and return 0 if they
650 * are equal. This function is called from Job_CatchChildren
651 * to find the job descriptor of the finished job.
655 * pid process id desired
658 * Job with matching pid
662 *-----------------------------------------------------------------------
665 JobFindPid(int pid, int status, Boolean isJobs)
669 for (job = job_table; job < job_table_end; job++) {
670 if ((job->job_state == status) && job->pid == pid)
673 if (DEBUG(JOB) && isJobs)
674 job_table_dump("no pid");
679 *-----------------------------------------------------------------------
681 * Put out another command for the given job. If the command starts
682 * with an @ or a - we process it specially. In the former case,
683 * so long as the -s and -n flags weren't given to make, we stick
684 * a shell-specific echoOff command in the script. In the latter,
685 * we ignore errors for the entire job, unless the shell has error
687 * If the command is just "..." we take all future commands for this
688 * job to be commands to be executed once the entire graph has been
689 * made and return non-zero to signal that the end of the commands
690 * was reached. These commands are later attached to the postCommands
691 * node and executed by Job_End when all things are done.
692 * This function is called from JobStart via Lst_ForEach.
695 * cmdp command string to print
696 * jobp job for which to print it
699 * Always 0, unless the command was "..."
702 * If the command begins with a '-' and the shell has no error control,
703 * the JOB_IGNERR flag is set in the job descriptor.
704 * If the command is "..." and we're not ignoring such things,
705 * tailCmds is set to the successor node of the cmd.
706 * numCommands is incremented if the command is actually printed.
707 *-----------------------------------------------------------------------
710 JobPrintCommand(void *cmdp, void *jobp)
712 Boolean noSpecials; /* true if we shouldn't worry about
713 * inserting special commands into
714 * the input stream. */
715 Boolean shutUp = FALSE; /* true if we put a no echo command
716 * into the command file */
717 Boolean errOff = FALSE; /* true if we turned error checking
718 * off before printing the command
719 * and need to turn it back on */
720 const char *cmdTemplate; /* Template to use when printing the
722 char *cmdStart; /* Start of expanded command */
723 char *escCmd = NULL; /* Command with quotes/backticks escaped */
724 char *cmd = (char *)cmdp;
725 Job *job = (Job *)jobp;
728 noSpecials = NoExecute(job->node);
730 if (strcmp(cmd, "...") == 0) {
731 job->node->type |= OP_SAVE_CMDS;
732 if ((job->flags & JOB_IGNDOTS) == 0) {
733 job->tailCmds = Lst_Succ(Lst_Member(job->node->commands,
740 #define DBPRINTF(fmt, arg) if (DEBUG(JOB)) { \
741 (void)fprintf(debug_file, fmt, arg); \
743 (void)fprintf(job->cmdFILE, fmt, arg); \
744 (void)fflush(job->cmdFILE);
748 cmdStart = cmd = Var_Subst(NULL, cmd, job->node, VARF_WANTRES);
750 cmdTemplate = "%s\n";
753 * Check for leading @' and -'s to control echoing and error checking.
755 while (*cmd == '@' || *cmd == '-' || (*cmd == '+')) {
758 shutUp = DEBUG(LOUD) ? FALSE : TRUE;
766 * We're not actually executing anything...
767 * but this one needs to be - use compat mode just for it.
769 CompatRunCommand(cmdp, job->node);
777 while (isspace((unsigned char) *cmd))
781 * If the shell doesn't have error control the alternate echo'ing will
782 * be done (to avoid showing additional error checking code)
783 * and this will need the characters '$ ` \ "' escaped
786 if (!commandShell->hasErrCtl) {
787 /* Worst that could happen is every char needs escaping. */
788 escCmd = bmake_malloc((strlen(cmd) * 2) + 1);
789 for (i = 0, j= 0; cmd[i] != '\0'; i++, j++) {
790 if (cmd[i] == '$' || cmd[i] == '`' || cmd[i] == '\\' ||
799 if (!(job->flags & JOB_SILENT) && !noSpecials &&
800 commandShell->hasEchoCtl) {
801 DBPRINTF("%s\n", commandShell->echoOff);
803 if (commandShell->hasErrCtl)
810 if (commandShell->hasErrCtl) {
812 * we don't want the error-control commands showing
813 * up either, so we turn off echoing while executing
814 * them. We could put another field in the shell
815 * structure to tell JobDoOutput to look for this
816 * string too, but why make it any more complex than
819 if (!(job->flags & JOB_SILENT) && !shutUp &&
820 commandShell->hasEchoCtl) {
821 DBPRINTF("%s\n", commandShell->echoOff);
822 DBPRINTF("%s\n", commandShell->ignErr);
823 DBPRINTF("%s\n", commandShell->echoOn);
825 DBPRINTF("%s\n", commandShell->ignErr);
827 } else if (commandShell->ignErr &&
828 (*commandShell->ignErr != '\0'))
831 * The shell has no error control, so we need to be
832 * weird to get it to ignore any errors from the command.
833 * If echoing is turned on, we turn it off and use the
834 * errCheck template to echo the command. Leave echoing
835 * off so the user doesn't see the weirdness we go through
836 * to ignore errors. Set cmdTemplate to use the weirdness
837 * instead of the simple "%s\n" template.
839 job->flags |= JOB_IGNERR;
840 if (!(job->flags & JOB_SILENT) && !shutUp) {
841 if (commandShell->hasEchoCtl) {
842 DBPRINTF("%s\n", commandShell->echoOff);
844 DBPRINTF(commandShell->errCheck, escCmd);
848 DBPRINTF(commandShell->errCheck, escCmd);
851 cmdTemplate = commandShell->ignErr;
853 * The error ignoration (hee hee) is already taken care
854 * of by the ignErr template, so pretend error checking
867 * If errors are being checked and the shell doesn't have error control
868 * but does supply an errOut template, then setup commands to run
872 if (!commandShell->hasErrCtl && commandShell->errOut &&
873 (*commandShell->errOut != '\0')) {
874 if (!(job->flags & JOB_SILENT) && !shutUp) {
875 if (commandShell->hasEchoCtl) {
876 DBPRINTF("%s\n", commandShell->echoOff);
878 DBPRINTF(commandShell->errCheck, escCmd);
881 /* If it's a comment line or blank, treat as an ignored error */
882 if ((escCmd[0] == commandShell->commentChar) ||
884 cmdTemplate = commandShell->ignErr;
886 cmdTemplate = commandShell->errOut;
891 if (DEBUG(SHELL) && strcmp(shellName, "sh") == 0 &&
892 (job->flags & JOB_TRACED) == 0) {
893 DBPRINTF("set -%s\n", "x");
894 job->flags |= JOB_TRACED;
897 DBPRINTF(cmdTemplate, cmd);
902 * If echoing is already off, there's no point in issuing the
903 * echoOff command. Otherwise we issue it and pretend it was on
904 * for the whole command...
906 if (!shutUp && !(job->flags & JOB_SILENT) && commandShell->hasEchoCtl){
907 DBPRINTF("%s\n", commandShell->echoOff);
910 DBPRINTF("%s\n", commandShell->errCheck);
912 if (shutUp && commandShell->hasEchoCtl) {
913 DBPRINTF("%s\n", commandShell->echoOn);
919 *-----------------------------------------------------------------------
921 * Save a command to be executed when everything else is done.
922 * Callback function for JobFinish...
928 * The command is tacked onto the end of postCommands's commands list.
930 *-----------------------------------------------------------------------
933 JobSaveCommand(void *cmd, void *gn)
935 cmd = Var_Subst(NULL, (char *)cmd, (GNode *)gn, VARF_WANTRES);
936 (void)Lst_AtEnd(postCommands->commands, cmd);
942 *-----------------------------------------------------------------------
944 * Called to close both input and output pipes when a job is finished.
950 * The file descriptors associated with the job are closed.
952 *-----------------------------------------------------------------------
958 (void)close(job->outPipe);
961 JobDoOutput(job, TRUE);
962 (void)close(job->inPipe);
967 *-----------------------------------------------------------------------
969 * Do final processing for the given job including updating
970 * parents and starting new jobs as available/necessary. Note
971 * that we pay no attention to the JOB_IGNERR flag here.
972 * This is because when we're called because of a noexecute flag
973 * or something, jstat.w_status is 0 and when called from
974 * Job_CatchChildren, the status is zeroed if it s/b ignored.
978 * status sub-why job went away
984 * Final commands for the job are placed on postCommands.
986 * If we got an error and are aborting (aborting == ABORT_ERROR) and
987 * the job list is now empty, we are done for the day.
988 * If we recognized an error (errors !=0), we set the aborting flag
989 * to ABORT_ERROR so no more jobs will be started.
990 *-----------------------------------------------------------------------
994 JobFinish (Job *job, WAIT_T status)
996 Boolean done, return_job_token;
999 fprintf(debug_file, "Jobfinish: %d [%s], status %d\n",
1000 job->pid, job->node->name, status);
1003 if ((WIFEXITED(status) &&
1004 (((WEXITSTATUS(status) != 0) && !(job->flags & JOB_IGNERR)))) ||
1005 WIFSIGNALED(status))
1008 * If it exited non-zero and either we're doing things our
1009 * way or we're not ignoring errors, the job is finished.
1010 * Similarly, if the shell died because of a signal
1011 * the job is also finished. In these
1012 * cases, finish out the job's output before printing the exit
1016 if (job->cmdFILE != NULL && job->cmdFILE != stdout) {
1017 (void)fclose(job->cmdFILE);
1018 job->cmdFILE = NULL;
1021 } else if (WIFEXITED(status)) {
1023 * Deal with ignored errors in -B mode. We need to print a message
1024 * telling of the ignored error as well as setting status.w_status
1025 * to 0 so the next command gets run. To do this, we set done to be
1026 * TRUE if in -B mode and the job exited non-zero.
1028 done = WEXITSTATUS(status) != 0;
1030 * Old comment said: "Note we don't
1031 * want to close down any of the streams until we know we're at the
1033 * But we do. Otherwise when are we going to print the rest of the
1039 * No need to close things down or anything.
1045 if (WIFEXITED(status)) {
1047 (void)fprintf(debug_file, "Process %d [%s] exited.\n",
1048 job->pid, job->node->name);
1050 if (WEXITSTATUS(status) != 0) {
1051 if (job->node != lastNode) {
1052 MESSAGE(stdout, job->node);
1053 lastNode = job->node;
1057 meta_job_error(job, job->node, job->flags, WEXITSTATUS(status));
1060 (void)printf("*** [%s] Error code %d%s\n",
1062 WEXITSTATUS(status),
1063 (job->flags & JOB_IGNERR) ? " (ignored)" : "");
1064 if (job->flags & JOB_IGNERR) {
1065 WAIT_STATUS(status) = 0;
1067 if (deleteOnError) {
1068 JobDeleteTarget(job->node);
1070 PrintOnError(job->node, NULL);
1072 } else if (DEBUG(JOB)) {
1073 if (job->node != lastNode) {
1074 MESSAGE(stdout, job->node);
1075 lastNode = job->node;
1077 (void)printf("*** [%s] Completed successfully\n",
1081 if (job->node != lastNode) {
1082 MESSAGE(stdout, job->node);
1083 lastNode = job->node;
1085 (void)printf("*** [%s] Signal %d\n",
1086 job->node->name, WTERMSIG(status));
1087 if (deleteOnError) {
1088 JobDeleteTarget(job->node);
1091 (void)fflush(stdout);
1098 if ((x = meta_job_finish(job)) != 0 && status == 0) {
1104 return_job_token = FALSE;
1106 Trace_Log(JOBEND, job);
1107 if (!(job->flags & JOB_SPECIAL)) {
1108 if ((WAIT_STATUS(status) != 0) ||
1109 (aborting == ABORT_ERROR) ||
1110 (aborting == ABORT_INTERRUPT))
1111 return_job_token = TRUE;
1114 if ((aborting != ABORT_ERROR) && (aborting != ABORT_INTERRUPT) &&
1115 (WAIT_STATUS(status) == 0)) {
1117 * As long as we aren't aborting and the job didn't return a non-zero
1118 * status that we shouldn't ignore, we call Make_Update to update
1119 * the parents. In addition, any saved commands for the node are placed
1120 * on the .END target.
1122 if (job->tailCmds != NULL) {
1123 Lst_ForEachFrom(job->node->commands, job->tailCmds,
1127 job->node->made = MADE;
1128 if (!(job->flags & JOB_SPECIAL))
1129 return_job_token = TRUE;
1130 Make_Update(job->node);
1131 job->job_state = JOB_ST_FREE;
1132 } else if (WAIT_STATUS(status)) {
1134 job->job_state = JOB_ST_FREE;
1138 * Set aborting if any error.
1140 if (errors && !keepgoing && (aborting != ABORT_INTERRUPT)) {
1142 * If we found any errors in this batch of children and the -k flag
1143 * wasn't given, we set the aborting flag so no more jobs get
1146 aborting = ABORT_ERROR;
1149 if (return_job_token)
1152 if (aborting == ABORT_ERROR && jobTokensRunning == 0) {
1154 * If we are aborting and the job table is now empty, we finish.
1161 *-----------------------------------------------------------------------
1163 * Touch the given target. Called by JobStart when the -t flag was
1167 * gn the node of the file to touch
1168 * silent TRUE if should not print message
1174 * The data modification of the file is changed. In addition, if the
1175 * file did not exist, it is created.
1176 *-----------------------------------------------------------------------
1179 Job_Touch(GNode *gn, Boolean silent)
1181 int streamID; /* ID of stream opened to do the touch */
1182 struct utimbuf times; /* Times for utime() call */
1184 if (gn->type & (OP_JOIN|OP_USE|OP_USEBEFORE|OP_EXEC|OP_OPTIONAL|
1185 OP_SPECIAL|OP_PHONY)) {
1187 * .JOIN, .USE, .ZEROTIME and .OPTIONAL targets are "virtual" targets
1188 * and, as such, shouldn't really be created.
1193 if (!silent || NoExecute(gn)) {
1194 (void)fprintf(stdout, "touch %s\n", gn->name);
1195 (void)fflush(stdout);
1198 if (NoExecute(gn)) {
1202 if (gn->type & OP_ARCHV) {
1204 } else if (gn->type & OP_LIB) {
1207 char *file = gn->path ? gn->path : gn->name;
1209 times.actime = times.modtime = now;
1210 if (utime(file, ×) < 0){
1211 streamID = open(file, O_RDWR | O_CREAT, 0666);
1213 if (streamID >= 0) {
1217 * Read and write a byte to the file to change the
1218 * modification time, then close the file.
1220 if (read(streamID, &c, 1) == 1) {
1221 (void)lseek(streamID, (off_t)0, SEEK_SET);
1222 while (write(streamID, &c, 1) == -1 && errno == EAGAIN)
1226 (void)close(streamID);
1228 (void)fprintf(stdout, "*** couldn't touch %s: %s",
1229 file, strerror(errno));
1230 (void)fflush(stdout);
1237 *-----------------------------------------------------------------------
1238 * Job_CheckCommands --
1239 * Make sure the given node has all the commands it needs.
1242 * gn The target whose commands need verifying
1243 * abortProc Function to abort with message
1246 * TRUE if the commands list is/was ok.
1249 * The node will have commands from the .DEFAULT rule added to it
1251 *-----------------------------------------------------------------------
1254 Job_CheckCommands(GNode *gn, void (*abortProc)(const char *, ...))
1256 if (OP_NOP(gn->type) && Lst_IsEmpty(gn->commands) &&
1257 ((gn->type & OP_LIB) == 0 || Lst_IsEmpty(gn->children))) {
1259 * No commands. Look for .DEFAULT rule from which we might infer
1262 if ((DEFAULT != NULL) && !Lst_IsEmpty(DEFAULT->commands) &&
1263 (gn->type & OP_SPECIAL) == 0) {
1266 * Make only looks for a .DEFAULT if the node was never the
1267 * target of an operator, so that's what we do too. If
1268 * a .DEFAULT was given, we substitute its commands for gn's
1269 * commands and set the IMPSRC variable to be the target's name
1270 * The DEFAULT node acts like a transformation rule, in that
1271 * gn also inherits any attributes or sources attached to
1274 Make_HandleUse(DEFAULT, gn);
1275 Var_Set(IMPSRC, Var_Value(TARGET, gn, &p1), gn, 0);
1277 } else if (Dir_MTime(gn, 0) == 0 && (gn->type & OP_SPECIAL) == 0) {
1279 * The node wasn't the target of an operator we have no .DEFAULT
1280 * rule to go on and the target doesn't already exist. There's
1281 * nothing more we can do for this branch. If the -k flag wasn't
1282 * given, we stop in our tracks, otherwise we just don't update
1283 * this node's parents so they never get examined.
1285 static const char msg[] = ": don't know how to make";
1287 if (gn->flags & FROM_DEPEND) {
1288 if (!Job_RunTarget(".STALE", gn->fname))
1289 fprintf(stdout, "%s: %s, %d: ignoring stale %s for %s\n",
1290 progname, gn->fname, gn->lineno, makeDependfile,
1295 if (gn->type & OP_OPTIONAL) {
1296 (void)fprintf(stdout, "%s%s %s (ignored)\n", progname,
1298 (void)fflush(stdout);
1299 } else if (keepgoing) {
1300 (void)fprintf(stdout, "%s%s %s (continuing)\n", progname,
1302 (void)fflush(stdout);
1305 (*abortProc)("%s%s %s. Stop", progname, msg, gn->name);
1314 *-----------------------------------------------------------------------
1316 * Execute the shell for the given job. Called from JobStart
1319 * job Job to execute
1325 * A shell is executed, outputs is altered and the Job structure added
1328 *-----------------------------------------------------------------------
1331 JobExec(Job *job, char **argv)
1333 int cpid; /* ID of new child */
1336 job->flags &= ~JOB_TRACED;
1341 (void)fprintf(debug_file, "Running %s %sly\n", job->node->name, "local");
1342 (void)fprintf(debug_file, "\tCommand: ");
1343 for (i = 0; argv[i] != NULL; i++) {
1344 (void)fprintf(debug_file, "%s ", argv[i]);
1346 (void)fprintf(debug_file, "\n");
1350 * Some jobs produce no output and it's disconcerting to have
1351 * no feedback of their running (since they produce no output, the
1352 * banner with their name in it never appears). This is an attempt to
1353 * provide that feedback, even if nothing follows it.
1355 if ((lastNode != job->node) && !(job->flags & JOB_SILENT)) {
1356 MESSAGE(stdout, job->node);
1357 lastNode = job->node;
1360 /* No interruptions until this job is on the `jobs' list */
1363 /* Pre-emptively mark job running, pid still zero though */
1364 job->job_state = JOB_ST_RUNNING;
1368 Punt("Cannot vfork: %s", strerror(errno));
1376 meta_job_child(job);
1380 * Reset all signal handlers; this is necessary because we also
1381 * need to unblock signals before we exec(2).
1385 /* Now unblock signals */
1386 sigemptyset(&tmask);
1387 JobSigUnlock(&tmask);
1390 * Must duplicate the input stream down to the child's input and
1391 * reset it to the beginning (again). Since the stream was marked
1392 * close-on-exec, we must clear that bit in the new input.
1394 if (dup2(FILENO(job->cmdFILE), 0) == -1) {
1395 execError("dup2", "job->cmdFILE");
1398 (void)fcntl(0, F_SETFD, 0);
1399 (void)lseek(0, (off_t)0, SEEK_SET);
1401 if (Always_pass_job_queue ||
1402 (job->node->type & (OP_MAKE | OP_SUBMAKE))) {
1404 * Pass job token pipe to submakes.
1406 fcntl(tokenWaitJob.inPipe, F_SETFD, 0);
1407 fcntl(tokenWaitJob.outPipe, F_SETFD, 0);
1411 * Set up the child's output to be routed through the pipe
1412 * we've created for it.
1414 if (dup2(job->outPipe, 1) == -1) {
1415 execError("dup2", "job->outPipe");
1419 * The output channels are marked close on exec. This bit was
1420 * duplicated by the dup2(on some systems), so we have to clear
1421 * it before routing the shell's error output to the same place as
1422 * its standard output.
1424 (void)fcntl(1, F_SETFD, 0);
1425 if (dup2(1, 2) == -1) {
1426 execError("dup2", "1, 2");
1431 * We want to switch the child into a different process family so
1432 * we can kill it and all its descendants in one fell swoop,
1433 * by killing its process family, but not commit suicide.
1435 #if defined(HAVE_SETPGID)
1436 (void)setpgid(0, getpid());
1438 #if defined(HAVE_SETSID)
1439 /* XXX: dsl - I'm sure this should be setpgrp()... */
1442 (void)setpgrp(0, getpid());
1448 (void)execv(shellPath, argv);
1449 execError("exec", shellPath);
1453 /* Parent, continuing after the child exec */
1456 Trace_Log(JOBSTART, job);
1459 * Set the current position in the buffer to the beginning
1460 * and mark another stream to watch in the outputs mask
1466 if (job->cmdFILE != NULL && job->cmdFILE != stdout) {
1467 (void)fclose(job->cmdFILE);
1468 job->cmdFILE = NULL;
1472 * Now the job is actually running, add it to the table.
1475 fprintf(debug_file, "JobExec(%s): pid %d added to jobs table\n",
1476 job->node->name, job->pid);
1477 job_table_dump("job started");
1479 JobSigUnlock(&mask);
1483 *-----------------------------------------------------------------------
1485 * Create the argv needed to execute the shell for a given job.
1492 *-----------------------------------------------------------------------
1495 JobMakeArgv(Job *job, char **argv)
1498 static char args[10]; /* For merged arguments */
1500 argv[0] = UNCONST(shellName);
1503 if ((commandShell->exit && (*commandShell->exit != '-')) ||
1504 (commandShell->echo && (*commandShell->echo != '-')))
1507 * At least one of the flags doesn't have a minus before it, so
1508 * merge them together. Have to do this because the *(&(@*#*&#$#
1509 * Bourne shell thinks its second argument is a file to source.
1510 * Grrrr. Note the ten-character limitation on the combined arguments.
1512 (void)snprintf(args, sizeof(args), "-%s%s",
1513 ((job->flags & JOB_IGNERR) ? "" :
1514 (commandShell->exit ? commandShell->exit : "")),
1515 ((job->flags & JOB_SILENT) ? "" :
1516 (commandShell->echo ? commandShell->echo : "")));
1523 if (!(job->flags & JOB_IGNERR) && commandShell->exit) {
1524 argv[argc] = UNCONST(commandShell->exit);
1527 if (!(job->flags & JOB_SILENT) && commandShell->echo) {
1528 argv[argc] = UNCONST(commandShell->echo);
1536 *-----------------------------------------------------------------------
1538 * Start a target-creation process going for the target described
1539 * by the graph node gn.
1542 * gn target to create
1543 * flags flags for the job to override normal ones.
1544 * e.g. JOB_SPECIAL or JOB_IGNDOTS
1545 * previous The previous Job structure for this node, if any.
1548 * JOB_ERROR if there was an error in the commands, JOB_FINISHED
1549 * if there isn't actually anything left to do for the job and
1550 * JOB_RUNNING if the job has been started.
1553 * A new Job node is created and added to the list of running
1554 * jobs. PMake is forked and a child shell created.
1556 * NB: I'm fairly sure that this code is never called with JOB_SPECIAL set
1557 * JOB_IGNDOTS is never set (dsl)
1558 * Also the return value is ignored by everyone.
1559 *-----------------------------------------------------------------------
1562 JobStart(GNode *gn, int flags)
1564 Job *job; /* new job descriptor */
1565 char *argv[10]; /* Argument vector to shell */
1566 Boolean cmdsOK; /* true if the nodes commands were all right */
1567 Boolean noExec; /* Set true if we decide not to run the job */
1568 int tfd; /* File descriptor to the temp file */
1570 for (job = job_table; job < job_table_end; job++) {
1571 if (job->job_state == JOB_ST_FREE)
1574 if (job >= job_table_end)
1575 Punt("JobStart no job slots vacant");
1577 memset(job, 0, sizeof *job);
1578 job->job_state = JOB_ST_SETUP;
1579 if (gn->type & OP_SPECIAL)
1580 flags |= JOB_SPECIAL;
1583 job->tailCmds = NULL;
1586 * Set the initial value of the flags for this job based on the global
1587 * ones and the node's attributes... Any flags supplied by the caller
1588 * are also added to the field.
1591 if (Targ_Ignore(gn)) {
1592 job->flags |= JOB_IGNERR;
1594 if (Targ_Silent(gn)) {
1595 job->flags |= JOB_SILENT;
1597 job->flags |= flags;
1600 * Check the commands now so any attributes from .DEFAULT have a chance
1601 * to migrate to the node
1603 cmdsOK = Job_CheckCommands(gn, Error);
1605 job->inPollfd = NULL;
1607 * If the -n flag wasn't given, we open up OUR (not the child's)
1608 * temporary file to stuff commands in it. The thing is rd/wr so we don't
1609 * need to reopen it to feed it to the shell. If the -n flag *was* given,
1610 * we just set the file to be stdout. Cute, huh?
1612 if (((gn->type & OP_MAKE) && !(noRecursiveExecute)) ||
1613 (!noExecute && !touchFlag)) {
1615 * tfile is the name of a file into which all shell commands are
1616 * put. It is removed before the child shell is executed, unless
1617 * DEBUG(SCRIPT) is set.
1622 * We're serious here, but if the commands were bogus, we're
1626 PrintOnError(gn, NULL); /* provide some clue */
1631 tfd = mkTempFile(TMPPAT, &tfile);
1633 (void)eunlink(tfile);
1634 JobSigUnlock(&mask);
1636 job->cmdFILE = fdopen(tfd, "w+");
1637 if (job->cmdFILE == NULL) {
1638 Punt("Could not fdopen %s", tfile);
1640 (void)fcntl(FILENO(job->cmdFILE), F_SETFD, FD_CLOEXEC);
1642 * Send the commands to the command file, flush all its buffers then
1643 * rewind and remove the thing.
1649 meta_job_start(job, gn);
1650 if (Targ_Silent(gn)) { /* might have changed */
1651 job->flags |= JOB_SILENT;
1656 * We can do all the commands at once. hooray for sanity
1659 Lst_ForEach(gn->commands, JobPrintCommand, job);
1662 * If we didn't print out any commands to the shell script,
1663 * there's not much point in executing the shell, is there?
1665 if (numCommands == 0) {
1670 } else if (NoExecute(gn)) {
1672 * Not executing anything -- just print all the commands to stdout
1673 * in one fell swoop. This will still set up job->tailCmds correctly.
1675 if (lastNode != gn) {
1676 MESSAGE(stdout, gn);
1679 job->cmdFILE = stdout;
1681 * Only print the commands if they're ok, but don't die if they're
1682 * not -- just let the user know they're bad and keep going. It
1683 * doesn't do any harm in this case and may do some good.
1686 Lst_ForEach(gn->commands, JobPrintCommand, job);
1689 * Don't execute the shell, thank you.
1694 * Just touch the target and note that no shell should be executed.
1695 * Set cmdFILE to stdout to make life easier. Check the commands, too,
1696 * but don't die if they're no good -- it does no harm to keep working
1699 job->cmdFILE = stdout;
1700 Job_Touch(gn, job->flags&JOB_SILENT);
1703 /* Just in case it isn't already... */
1704 (void)fflush(job->cmdFILE);
1707 * If we're not supposed to execute a shell, don't.
1710 if (!(job->flags & JOB_SPECIAL))
1713 * Unlink and close the command file if we opened one
1715 if (job->cmdFILE != stdout) {
1716 if (job->cmdFILE != NULL) {
1717 (void)fclose(job->cmdFILE);
1718 job->cmdFILE = NULL;
1723 * We only want to work our way up the graph if we aren't here because
1724 * the commands for the job were no good.
1726 if (cmdsOK && aborting == 0) {
1727 if (job->tailCmds != NULL) {
1728 Lst_ForEachFrom(job->node->commands, job->tailCmds,
1732 job->node->made = MADE;
1733 Make_Update(job->node);
1735 job->job_state = JOB_ST_FREE;
1736 return cmdsOK ? JOB_FINISHED : JOB_ERROR;
1740 * Set up the control arguments to the shell. This is based on the flags
1741 * set earlier for this job.
1743 JobMakeArgv(job, argv);
1745 /* Create the pipe by which we'll get the shell's output. */
1746 JobCreatePipe(job, 3);
1749 return(JOB_RUNNING);
1753 JobOutput(Job *job, char *cp, char *endp, int msg)
1757 if (commandShell->noPrint) {
1758 ecp = Str_FindSubstring(cp, commandShell->noPrint);
1759 while (ecp != NULL) {
1762 if (!beSilent && msg && job->node != lastNode) {
1763 MESSAGE(stdout, job->node);
1764 lastNode = job->node;
1767 * The only way there wouldn't be a newline after
1768 * this line is if it were the last in the buffer.
1769 * however, since the non-printable comes after it,
1770 * there must be a newline, so we don't print one.
1772 (void)fprintf(stdout, "%s", cp);
1773 (void)fflush(stdout);
1775 cp = ecp + commandShell->noPLen;
1778 * Still more to print, look again after skipping
1779 * the whitespace following the non-printable
1783 while (*cp == ' ' || *cp == '\t' || *cp == '\n') {
1786 ecp = Str_FindSubstring(cp, commandShell->noPrint);
1796 *-----------------------------------------------------------------------
1798 * This function is called at different times depending on
1799 * whether the user has specified that output is to be collected
1800 * via pipes or temporary files. In the former case, we are called
1801 * whenever there is something to read on the pipe. We collect more
1802 * output from the given job and store it in the job's outBuf. If
1803 * this makes up a line, we print it tagged by the job's identifier,
1805 * If output has been collected in a temporary file, we open the
1806 * file and read it line by line, transfering it to our own
1807 * output channel until the file is empty. At which point we
1808 * remove the temporary file.
1809 * In both cases, however, we keep our figurative eye out for the
1810 * 'noPrint' line for the shell from which the output came. If
1811 * we recognize a line, we don't print it. If the command is not
1812 * alone on the line (the character after it is not \0 or \n), we
1813 * do print whatever follows it.
1816 * job the job whose output needs printing
1817 * finish TRUE if this is the last time we'll be called
1824 * curPos may be shifted as may the contents of outBuf.
1825 *-----------------------------------------------------------------------
1828 JobDoOutput(Job *job, Boolean finish)
1830 Boolean gotNL = FALSE; /* true if got a newline */
1831 Boolean fbuf; /* true if our buffer filled up */
1832 int nr; /* number of bytes read */
1833 int i; /* auxiliary index into outBuf */
1834 int max; /* limit for i (end of current data) */
1835 int nRead; /* (Temporary) number of bytes read */
1838 * Read as many bytes as will fit in the buffer.
1844 nRead = read(job->inPipe, &job->outBuf[job->curPos],
1845 JOB_BUFSIZE - job->curPos);
1847 if (errno == EAGAIN)
1850 perror("JobDoOutput(piperead)");
1858 * If we hit the end-of-file (the job is dead), we must flush its
1859 * remaining output, so pretend we read a newline if there's any
1860 * output remaining in the buffer.
1861 * Also clear the 'finish' flag so we stop looping.
1863 if ((nr == 0) && (job->curPos != 0)) {
1864 job->outBuf[job->curPos] = '\n';
1867 } else if (nr == 0) {
1872 * Look for the last newline in the bytes we just got. If there is
1873 * one, break out of the loop with 'i' as its index and gotNL set
1876 max = job->curPos + nr;
1877 for (i = job->curPos + nr - 1; i >= job->curPos; i--) {
1878 if (job->outBuf[i] == '\n') {
1881 } else if (job->outBuf[i] == '\0') {
1885 job->outBuf[i] = ' ';
1891 if (job->curPos == JOB_BUFSIZE) {
1893 * If we've run out of buffer space, we have no choice
1894 * but to print the stuff. sigh.
1900 if (gotNL || fbuf) {
1902 * Need to send the output to the screen. Null terminate it
1903 * first, overwriting the newline character if there was one.
1904 * So long as the line isn't one we should filter (according
1905 * to the shell description), we print the line, preceded
1906 * by a target banner if this target isn't the same as the
1907 * one for which we last printed something.
1908 * The rest of the data in the buffer are then shifted down
1909 * to the start of the buffer and curPos is set accordingly.
1911 job->outBuf[i] = '\0';
1912 if (i >= job->curPos) {
1915 cp = JobOutput(job, job->outBuf, &job->outBuf[i], FALSE);
1918 * There's still more in that thar buffer. This time, though,
1919 * we know there's no newline at the end, so we add one of
1920 * our own free will.
1923 if (!beSilent && job->node != lastNode) {
1924 MESSAGE(stdout, job->node);
1925 lastNode = job->node;
1929 meta_job_output(job, cp, gotNL ? "\n" : "");
1932 (void)fprintf(stdout, "%s%s", cp, gotNL ? "\n" : "");
1933 (void)fflush(stdout);
1937 * max is the last offset still in the buffer. Move any remaining
1938 * characters to the start of the buffer and update the end marker
1942 (void)memmove(job->outBuf, &job->outBuf[i + 1], max - (i + 1));
1943 job->curPos = max - (i + 1);
1951 * If the finish flag is true, we must loop until we hit
1952 * end-of-file on the pipe. This is guaranteed to happen
1953 * eventually since the other end of the pipe is now closed
1954 * (we closed it explicitly and the child has exited). When
1955 * we do get an EOF, finish will be set FALSE and we'll fall
1967 * Unfortunately it is too complicated to run .BEGIN, .END,
1968 * and .INTERRUPT job in the parallel job module. This has
1969 * the nice side effect that it avoids a lot of other problems.
1971 Lst lst = Lst_Init(FALSE);
1972 Lst_AtEnd(lst, targ);
1973 (void)Make_Run(lst);
1974 Lst_Destroy(lst, NULL);
1975 JobStart(targ, JOB_SPECIAL);
1976 while (jobTokensRunning) {
1980 Compat_Make(targ, targ);
1981 if (targ->made == ERROR) {
1982 PrintOnError(targ, "\n\nStop.");
1989 *-----------------------------------------------------------------------
1990 * Job_CatchChildren --
1991 * Handle the exit of a child. Called from Make_Make.
1994 * block TRUE if should block on the wait
2000 * The job descriptor is removed from the list of children.
2003 * We do waits, blocking or not, according to the wisdom of our
2004 * caller, until there are no more children to report. For each
2005 * job, call JobFinish to finish things off.
2007 *-----------------------------------------------------------------------
2011 Job_CatchChildren(void)
2013 int pid; /* pid of dead child */
2014 WAIT_T status; /* Exit/termination status */
2017 * Don't even bother if we know there's no one around.
2019 if (jobTokensRunning == 0)
2022 while ((pid = waitpid((pid_t) -1, &status, WNOHANG | WUNTRACED)) > 0) {
2024 (void)fprintf(debug_file, "Process %d exited/stopped status %x.\n", pid,
2025 WAIT_STATUS(status));
2027 JobReapChild(pid, status, TRUE);
2032 * It is possible that wait[pid]() was called from elsewhere,
2033 * this lets us reap jobs regardless.
2036 JobReapChild(pid_t pid, WAIT_T status, Boolean isJobs)
2038 Job *job; /* job descriptor for dead child */
2041 * Don't even bother if we know there's no one around.
2043 if (jobTokensRunning == 0)
2046 job = JobFindPid(pid, JOB_ST_RUNNING, isJobs);
2049 if (!lurking_children)
2050 Error("Child (%d) status %x not in table?", pid, status);
2052 return; /* not ours */
2054 if (WIFSTOPPED(status)) {
2056 (void)fprintf(debug_file, "Process %d (%s) stopped.\n",
2057 job->pid, job->node->name);
2059 if (!make_suspended) {
2060 switch (WSTOPSIG(status)) {
2062 (void)printf("*** [%s] Suspended\n", job->node->name);
2065 (void)printf("*** [%s] Stopped\n", job->node->name);
2068 (void)printf("*** [%s] Stopped -- signal %d\n",
2069 job->node->name, WSTOPSIG(status));
2071 job->job_suspended = 1;
2073 (void)fflush(stdout);
2077 job->job_state = JOB_ST_FINISHED;
2078 job->exit_status = WAIT_STATUS(status);
2080 JobFinish(job, status);
2084 *-----------------------------------------------------------------------
2085 * Job_CatchOutput --
2086 * Catch the output from our children, if we're using
2087 * pipes do so. Otherwise just block time until we get a
2088 * signal(most likely a SIGCHLD) since there's no point in
2089 * just spinning when there's nothing to do and the reaping
2090 * of a child can wait for a while.
2096 * Output is read from pipes if we're piping.
2097 * -----------------------------------------------------------------------
2100 Job_CatchOutput(void)
2106 (void)fflush(stdout);
2108 /* The first fd in the list is the job token pipe */
2110 nready = poll(fds + 1 - wantToken, nfds - 1 + wantToken, POLL_MSEC);
2111 } while (nready < 0 && errno == EINTR);
2114 Punt("poll: %s", strerror(errno));
2116 if (nready > 0 && readyfd(&childExitJob)) {
2119 count = read(childExitJob.inPipe, &token, 1);
2122 Punt("unexpected eof on token pipe");
2124 Punt("token pipe read: %s", strerror(errno));
2126 if (token == DO_JOB_RESUME[0])
2127 /* Complete relay requested from our SIGCONT handler */
2136 Job_CatchChildren();
2140 for (i = 2; i < nfds; i++) {
2141 if (!fds[i].revents)
2144 if (job->job_state == JOB_ST_RUNNING)
2145 JobDoOutput(job, FALSE);
2152 *-----------------------------------------------------------------------
2154 * Start the creation of a target. Basically a front-end for
2155 * JobStart used by the Make module.
2161 * Another job is started.
2163 *-----------------------------------------------------------------------
2168 (void)JobStart(gn, 0);
2174 if (shellPath == NULL) {
2176 * We are using the default shell, which may be an absolute
2177 * path if DEFSHELL_CUSTOM is defined.
2179 shellName = commandShell->name;
2180 #ifdef DEFSHELL_CUSTOM
2181 if (*shellName == '/') {
2182 shellPath = shellName;
2183 shellName = strrchr(shellPath, '/');
2187 shellPath = str_concat(_PATH_DEFSHELLDIR, shellName, STR_ADDSLASH);
2189 if (commandShell->exit == NULL) {
2190 commandShell->exit = "";
2192 if (commandShell->echo == NULL) {
2193 commandShell->echo = "";
2195 if (commandShell->hasErrCtl && *commandShell->exit) {
2197 strcmp(commandShell->exit, &shellErrFlag[1]) != 0) {
2199 shellErrFlag = NULL;
2201 if (!shellErrFlag) {
2202 int n = strlen(commandShell->exit) + 2;
2204 shellErrFlag = bmake_malloc(n);
2206 snprintf(shellErrFlag, n, "-%s", commandShell->exit);
2209 } else if (shellErrFlag) {
2211 shellErrFlag = NULL;
2216 * Returns the string literal that is used in the current command shell
2217 * to produce a newline character.
2220 Shell_GetNewline(void)
2223 return commandShell->newline;
2232 } else if (!Var_Exists(MAKE_JOB_PREFIX, VAR_GLOBAL)) {
2233 Var_Set(MAKE_JOB_PREFIX, "---", VAR_GLOBAL, 0);
2236 targPrefix = Var_Subst(NULL, "${" MAKE_JOB_PREFIX "}",
2237 VAR_GLOBAL, VARF_WANTRES);
2241 *-----------------------------------------------------------------------
2243 * Initialize the process module
2251 * lists and counters are initialized
2252 *-----------------------------------------------------------------------
2258 /* Allocate space for all the job info */
2259 job_table = bmake_malloc(maxJobs * sizeof *job_table);
2260 memset(job_table, 0, maxJobs * sizeof *job_table);
2261 job_table_end = job_table + maxJobs;
2269 Always_pass_job_queue = getBoolean(MAKE_ALWAYS_PASS_JOB_QUEUE,
2270 Always_pass_job_queue);
2272 Job_error_token = getBoolean(MAKE_JOB_ERROR_TOKEN, Job_error_token);
2276 * There is a non-zero chance that we already have children.
2277 * eg after 'make -f- <<EOF'
2278 * Since their termination causes a 'Child (pid) not in table' message,
2279 * Collect the status of any that are already dead, and suppress the
2280 * error message if there are any undead ones.
2284 rval = waitpid((pid_t) -1, &status, WNOHANG);
2288 lurking_children = 1;
2294 JobCreatePipe(&childExitJob, 3);
2296 /* We can only need to wait for tokens, children and output from each job */
2297 fds = bmake_malloc(sizeof (*fds) * (2 + maxJobs));
2298 jobfds = bmake_malloc(sizeof (*jobfds) * (2 + maxJobs));
2300 /* These are permanent entries and take slots 0 and 1 */
2301 watchfd(&tokenWaitJob);
2302 watchfd(&childExitJob);
2304 sigemptyset(&caught_signals);
2306 * Install a SIGCHLD handler.
2308 (void)bmake_signal(SIGCHLD, JobChildSig);
2309 sigaddset(&caught_signals, SIGCHLD);
2311 #define ADDSIG(s,h) \
2312 if (bmake_signal(s, SIG_IGN) != SIG_IGN) { \
2313 sigaddset(&caught_signals, s); \
2314 (void)bmake_signal(s, h); \
2318 * Catch the four signals that POSIX specifies if they aren't ignored.
2319 * JobPassSig will take care of calling JobInterrupt if appropriate.
2321 ADDSIG(SIGINT, JobPassSig_int)
2322 ADDSIG(SIGHUP, JobPassSig_term)
2323 ADDSIG(SIGTERM, JobPassSig_term)
2324 ADDSIG(SIGQUIT, JobPassSig_term)
2327 * There are additional signals that need to be caught and passed if
2328 * either the export system wants to be told directly of signals or if
2329 * we're giving each job its own process group (since then it won't get
2330 * signals from the terminal driver as we own the terminal)
2332 ADDSIG(SIGTSTP, JobPassSig_suspend)
2333 ADDSIG(SIGTTOU, JobPassSig_suspend)
2334 ADDSIG(SIGTTIN, JobPassSig_suspend)
2335 ADDSIG(SIGWINCH, JobCondPassSig)
2336 ADDSIG(SIGCONT, JobContinueSig)
2339 (void)Job_RunTarget(".BEGIN", NULL);
2340 postCommands = Targ_FindNode(".END", TARG_CREATE);
2343 static void JobSigReset(void)
2346 if (sigismember(&caught_signals, s)) { \
2347 (void)bmake_signal(s, SIG_DFL); \
2360 (void)bmake_signal(SIGCHLD, SIG_DFL);
2364 *-----------------------------------------------------------------------
2366 * Find a shell in 'shells' given its name.
2369 * A pointer to the Shell structure.
2374 *-----------------------------------------------------------------------
2377 JobMatchShell(const char *name)
2381 for (sh = shells; sh->name != NULL; sh++) {
2382 if (strcmp(name, sh->name) == 0)
2389 *-----------------------------------------------------------------------
2391 * Parse a shell specification and set up commandShell, shellPath
2392 * and shellName appropriately.
2395 * line The shell spec
2398 * FAILURE if the specification was incorrect.
2401 * commandShell points to a Shell structure (either predefined or
2402 * created from the shell spec), shellPath is the full path of the
2403 * shell described by commandShell, while shellName is just the
2404 * final component of shellPath.
2407 * A shell specification consists of a .SHELL target, with dependency
2408 * operator, followed by a series of blank-separated words. Double
2409 * quotes can be used to use blanks in words. A backslash escapes
2410 * anything (most notably a double-quote and a space) and
2411 * provides the functionality it does in C. Each word consists of
2412 * keyword and value separated by an equal sign. There should be no
2413 * unnecessary spaces in the word. The keywords are as follows:
2414 * name Name of shell.
2415 * path Location of shell.
2416 * quiet Command to turn off echoing.
2417 * echo Command to turn echoing on
2418 * filter Result of turning off echoing that shouldn't be
2420 * echoFlag Flag to turn echoing on at the start
2421 * errFlag Flag to turn error checking on at the start
2422 * hasErrCtl True if shell has error checking control
2423 * newline String literal to represent a newline char
2424 * check Command to turn on error checking if hasErrCtl
2425 * is TRUE or template of command to echo a command
2426 * for which error checking is off if hasErrCtl is
2428 * ignore Command to turn off error checking if hasErrCtl
2429 * is TRUE or template of command to execute a
2430 * command so as to ignore any errors it returns if
2431 * hasErrCtl is FALSE.
2433 *-----------------------------------------------------------------------
2436 Job_ParseShell(char *line)
2443 Boolean fullSpec = FALSE;
2446 while (isspace((unsigned char)*line)) {
2450 free(UNCONST(shellArgv));
2452 memset(&newShell, 0, sizeof(newShell));
2455 * Parse the specification by keyword
2457 words = brk_string(line, &argc, TRUE, &path);
2458 if (words == NULL) {
2459 Error("Unterminated quoted string [%s]", line);
2464 for (path = NULL, argv = words; argc != 0; argc--, argv++) {
2465 if (strncmp(*argv, "path=", 5) == 0) {
2467 } else if (strncmp(*argv, "name=", 5) == 0) {
2468 newShell.name = &argv[0][5];
2470 if (strncmp(*argv, "quiet=", 6) == 0) {
2471 newShell.echoOff = &argv[0][6];
2472 } else if (strncmp(*argv, "echo=", 5) == 0) {
2473 newShell.echoOn = &argv[0][5];
2474 } else if (strncmp(*argv, "filter=", 7) == 0) {
2475 newShell.noPrint = &argv[0][7];
2476 newShell.noPLen = strlen(newShell.noPrint);
2477 } else if (strncmp(*argv, "echoFlag=", 9) == 0) {
2478 newShell.echo = &argv[0][9];
2479 } else if (strncmp(*argv, "errFlag=", 8) == 0) {
2480 newShell.exit = &argv[0][8];
2481 } else if (strncmp(*argv, "hasErrCtl=", 10) == 0) {
2482 char c = argv[0][10];
2483 newShell.hasErrCtl = !((c != 'Y') && (c != 'y') &&
2484 (c != 'T') && (c != 't'));
2485 } else if (strncmp(*argv, "newline=", 8) == 0) {
2486 newShell.newline = &argv[0][8];
2487 } else if (strncmp(*argv, "check=", 6) == 0) {
2488 newShell.errCheck = &argv[0][6];
2489 } else if (strncmp(*argv, "ignore=", 7) == 0) {
2490 newShell.ignErr = &argv[0][7];
2491 } else if (strncmp(*argv, "errout=", 7) == 0) {
2492 newShell.errOut = &argv[0][7];
2493 } else if (strncmp(*argv, "comment=", 8) == 0) {
2494 newShell.commentChar = argv[0][8];
2496 Parse_Error(PARSE_FATAL, "Unknown keyword \"%s\"",
2507 * If no path was given, the user wants one of the pre-defined shells,
2508 * yes? So we find the one s/he wants with the help of JobMatchShell
2509 * and set things up the right way. shellPath will be set up by
2512 if (newShell.name == NULL) {
2513 Parse_Error(PARSE_FATAL, "Neither path nor name specified");
2517 if ((sh = JobMatchShell(newShell.name)) == NULL) {
2518 Parse_Error(PARSE_WARNING, "%s: No matching shell",
2524 shellName = newShell.name;
2526 /* Shell_Init has already been called! Do it again. */
2527 free(UNCONST(shellPath));
2534 * The user provided a path. If s/he gave nothing else (fullSpec is
2535 * FALSE), try and find a matching shell in the ones we know of.
2536 * Else we just take the specification at its word and copy it
2537 * to a new location. In either case, we need to record the
2538 * path the user gave for the shell.
2541 path = strrchr(path, '/');
2543 path = UNCONST(shellPath);
2547 if (newShell.name != NULL) {
2548 shellName = newShell.name;
2553 if ((sh = JobMatchShell(shellName)) == NULL) {
2554 Parse_Error(PARSE_WARNING, "%s: No matching shell",
2561 commandShell = bmake_malloc(sizeof(Shell));
2562 *commandShell = newShell;
2564 /* this will take care of shellErrFlag */
2568 if (commandShell->echoOn && commandShell->echoOff) {
2569 commandShell->hasEchoCtl = TRUE;
2572 if (!commandShell->hasErrCtl) {
2573 if (commandShell->errCheck == NULL) {
2574 commandShell->errCheck = "";
2576 if (commandShell->ignErr == NULL) {
2577 commandShell->ignErr = "%s\n";
2582 * Do not free up the words themselves, since they might be in use by the
2583 * shell specification.
2590 *-----------------------------------------------------------------------
2592 * Handle the receipt of an interrupt.
2595 * runINTERRUPT Non-zero if commands for the .INTERRUPT target
2596 * should be executed
2597 * signo signal received
2603 * All children are killed. Another job will be started if the
2604 * .INTERRUPT target was given.
2605 *-----------------------------------------------------------------------
2608 JobInterrupt(int runINTERRUPT, int signo)
2610 Job *job; /* job descriptor in that element */
2611 GNode *interrupt; /* the node describing the .INTERRUPT target */
2615 aborting = ABORT_INTERRUPT;
2619 for (job = job_table; job < job_table_end; job++) {
2620 if (job->job_state != JOB_ST_RUNNING)
2625 JobDeleteTarget(gn);
2628 (void)fprintf(debug_file,
2629 "JobInterrupt passing signal %d to child %d.\n",
2632 KILLPG(job->pid, signo);
2636 JobSigUnlock(&mask);
2638 if (runINTERRUPT && !touchFlag) {
2639 interrupt = Targ_FindNode(".INTERRUPT", TARG_NOCREATE);
2640 if (interrupt != NULL) {
2641 ignoreErrors = FALSE;
2645 Trace_Log(MAKEINTR, 0);
2650 *-----------------------------------------------------------------------
2652 * Do final processing such as the running of the commands
2653 * attached to the .END target.
2656 * Number of errors reported.
2660 *-----------------------------------------------------------------------
2665 if (postCommands != NULL &&
2666 (!Lst_IsEmpty(postCommands->commands) ||
2667 !Lst_IsEmpty(postCommands->children))) {
2669 Error("Errors reported so .END ignored");
2671 JobRun(postCommands);
2678 *-----------------------------------------------------------------------
2680 * Cleanup any memory used by the jobs module
2687 *-----------------------------------------------------------------------
2698 *-----------------------------------------------------------------------
2700 * Waits for all running jobs to finish and returns. Sets 'aborting'
2701 * to ABORT_WAIT to prevent other jobs from starting.
2707 * Currently running jobs finish.
2709 *-----------------------------------------------------------------------
2714 aborting = ABORT_WAIT;
2715 while (jobTokensRunning != 0) {
2722 *-----------------------------------------------------------------------
2724 * Abort all currently running jobs without handling output or anything.
2725 * This function is to be called only in the event of a major
2726 * error. Most definitely NOT to be called from JobInterrupt.
2732 * All children are killed, not just the firstborn
2733 *-----------------------------------------------------------------------
2738 Job *job; /* the job descriptor in that element */
2741 aborting = ABORT_ERROR;
2743 if (jobTokensRunning) {
2744 for (job = job_table; job < job_table_end; job++) {
2745 if (job->job_state != JOB_ST_RUNNING)
2748 * kill the child process with increasingly drastic signals to make
2749 * darn sure it's dead.
2751 KILLPG(job->pid, SIGINT);
2752 KILLPG(job->pid, SIGKILL);
2757 * Catch as many children as want to report in at first, then give up
2759 while (waitpid((pid_t) -1, &foo, WNOHANG) > 0)
2765 *-----------------------------------------------------------------------
2767 * Tries to restart stopped jobs if there are slots available.
2768 * Called in process context in response to a SIGCONT.
2776 *-----------------------------------------------------------------------
2779 JobRestartJobs(void)
2783 for (job = job_table; job < job_table_end; job++) {
2784 if (job->job_state == JOB_ST_RUNNING &&
2785 (make_suspended || job->job_suspended)) {
2787 (void)fprintf(debug_file, "Restarting stopped job pid %d.\n",
2790 if (job->job_suspended) {
2791 (void)printf("*** [%s] Continued\n", job->node->name);
2792 (void)fflush(stdout);
2794 job->job_suspended = 0;
2795 if (KILLPG(job->pid, SIGCONT) != 0 && DEBUG(JOB)) {
2796 fprintf(debug_file, "Failed to send SIGCONT to %d\n", job->pid);
2799 if (job->job_state == JOB_ST_FINISHED)
2800 /* Job exit deferred after calling waitpid() in a signal handler */
2801 JobFinish(job, job->exit_status);
2809 if (job->inPollfd != NULL)
2810 Punt("Watching watched job");
2812 fds[nfds].fd = job->inPipe;
2813 fds[nfds].events = POLLIN;
2815 job->inPollfd = &fds[nfds];
2823 if (job->inPollfd == NULL)
2824 Punt("Unwatching unwatched job");
2825 i = job->inPollfd - fds;
2828 * Move last job in table into hole made by dead job.
2832 jobfds[i] = jobfds[nfds];
2833 jobfds[i]->inPollfd = &fds[i];
2835 job->inPollfd = NULL;
2841 if (job->inPollfd == NULL)
2842 Punt("Polling unwatched job");
2843 return (job->inPollfd->revents & POLLIN) != 0;
2847 *-----------------------------------------------------------------------
2849 * Put a token into the job pipe so that some make process can start
2853 * Allows more build jobs to be spawned somewhere.
2855 *-----------------------------------------------------------------------
2861 char tok = JOB_TOKENS[aborting], tok1;
2863 if (!Job_error_token && aborting == ABORT_ERROR) {
2864 if (jobTokensRunning == 0)
2866 tok = '+'; /* no error token */
2869 /* If we are depositing an error token flush everything else */
2870 while (tok != '+' && read(tokenWaitJob.inPipe, &tok1, 1) == 1)
2874 fprintf(debug_file, "(%d) aborting %d, deposit token %c\n",
2875 getpid(), aborting, tok);
2876 while (write(tokenWaitJob.outPipe, &tok, 1) == -1 && errno == EAGAIN)
2881 *-----------------------------------------------------------------------
2882 * Job_ServerStartTokenAdd --
2883 * Prep the job token pipe in the root make process.
2885 *-----------------------------------------------------------------------
2889 Job_ServerStart(int max_tokens, int jp_0, int jp_1)
2894 if (jp_0 >= 0 && jp_1 >= 0) {
2895 /* Pipe passed in from parent */
2896 tokenWaitJob.inPipe = jp_0;
2897 tokenWaitJob.outPipe = jp_1;
2898 (void)fcntl(jp_0, F_SETFD, FD_CLOEXEC);
2899 (void)fcntl(jp_1, F_SETFD, FD_CLOEXEC);
2903 JobCreatePipe(&tokenWaitJob, 15);
2905 snprintf(jobarg, sizeof(jobarg), "%d,%d",
2906 tokenWaitJob.inPipe, tokenWaitJob.outPipe);
2908 Var_Append(MAKEFLAGS, "-J", VAR_GLOBAL);
2909 Var_Append(MAKEFLAGS, jobarg, VAR_GLOBAL);
2912 * Preload the job pipe with one token per job, save the one
2913 * "extra" token for the primary job.
2915 * XXX should clip maxJobs against PIPE_BUF -- if max_tokens is
2916 * larger than the write buffer size of the pipe, we will
2919 for (i = 1; i < max_tokens; i++)
2924 *-----------------------------------------------------------------------
2925 * Job_TokenReturn --
2926 * Return a withdrawn token to the pool.
2928 *-----------------------------------------------------------------------
2932 Job_TokenReturn(void)
2935 if (jobTokensRunning < 0)
2936 Punt("token botch");
2937 if (jobTokensRunning || JOB_TOKENS[aborting] != '+')
2942 *-----------------------------------------------------------------------
2943 * Job_TokenWithdraw --
2944 * Attempt to withdraw a token from the pool.
2947 * Returns TRUE if a token was withdrawn, and FALSE if the pool
2948 * is currently empty.
2951 * If pool is empty, set wantToken so that we wake up
2952 * when a token is released.
2954 *-----------------------------------------------------------------------
2959 Job_TokenWithdraw(void)
2966 fprintf(debug_file, "Job_TokenWithdraw(%d): aborting %d, running %d\n",
2967 getpid(), aborting, jobTokensRunning);
2969 if (aborting || (jobTokensRunning >= maxJobs))
2972 count = read(tokenWaitJob.inPipe, &tok, 1);
2974 Fatal("eof on job pipe!");
2975 if (count < 0 && jobTokensRunning != 0) {
2976 if (errno != EAGAIN) {
2977 Fatal("job pipe read: %s", strerror(errno));
2980 fprintf(debug_file, "(%d) blocked for token\n", getpid());
2985 if (count == 1 && tok != '+') {
2986 /* make being abvorted - remove any other job tokens */
2988 fprintf(debug_file, "(%d) aborted by token %c\n", getpid(), tok);
2989 while (read(tokenWaitJob.inPipe, &tok1, 1) == 1)
2991 /* And put the stopper back */
2992 while (write(tokenWaitJob.outPipe, &tok, 1) == -1 && errno == EAGAIN)
2994 Fatal("A failure has been detected in another branch of the parallel make");
2997 if (count == 1 && jobTokensRunning == 0)
2998 /* We didn't want the token really */
2999 while (write(tokenWaitJob.outPipe, &tok, 1) == -1 && errno == EAGAIN)
3004 fprintf(debug_file, "(%d) withdrew token\n", getpid());
3009 *-----------------------------------------------------------------------
3011 * Run the named target if found. If a filename is specified, then
3012 * set that to the sources.
3018 * exits if the target fails.
3020 *-----------------------------------------------------------------------
3023 Job_RunTarget(const char *target, const char *fname) {
3024 GNode *gn = Targ_FindNode(target, TARG_NOCREATE);
3030 Var_Set(ALLSRC, fname, gn, 0);
3033 if (gn->made == ERROR) {
3034 PrintOnError(gn, "\n\nStop.");
3042 emul_poll(struct pollfd *fd, int nfd, int timeout)
3045 int i, maxfd, nselect, npoll;
3046 struct timeval tv, *tvp;
3053 for (i = 0; i < nfd; i++) {
3056 if (fd[i].events & POLLIN)
3057 FD_SET(fd[i].fd, &rfds);
3059 if (fd[i].events & POLLOUT)
3060 FD_SET(fd[i].fd, &wfds);
3062 if (fd[i].fd > maxfd)
3066 if (maxfd >= FD_SETSIZE) {
3067 Punt("Ran out of fd_set slots; "
3068 "recompile with a larger FD_SETSIZE.");
3074 usecs = timeout * 1000;
3075 tv.tv_sec = usecs / 1000000;
3076 tv.tv_usec = usecs % 1000000;
3080 nselect = select(maxfd + 1, &rfds, &wfds, 0, tvp);
3086 for (i = 0; i < nfd; i++) {
3087 if (FD_ISSET(fd[i].fd, &rfds))
3088 fd[i].revents |= POLLIN;
3090 if (FD_ISSET(fd[i].fd, &wfds))
3091 fd[i].revents |= POLLOUT;
3099 #endif /* USE_SELECT */