1 /* $NetBSD: job.c,v 1.177 2014/07/16 15:33:41 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 1.177 2014/07/16 15:33:41 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 1.177 2014/07/16 15:33:41 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 char *shellErrFlag = NULL;
317 static const char *shellArgv = NULL; /* Custom shell args */
320 STATIC Job *job_table; /* The structures that describe them */
321 STATIC Job *job_table_end; /* job_table + maxJobs */
322 static int wantToken; /* we want a token */
323 static int lurking_children = 0;
324 static int make_suspended = 0; /* non-zero if we've seen a SIGTSTP (etc) */
327 * Set of descriptors of pipes connected to
328 * the output channels of children
330 static struct pollfd *fds = NULL;
331 static Job **jobfds = NULL;
333 static void watchfd(Job *);
334 static void clearfd(Job *);
335 static int readyfd(Job *);
337 STATIC GNode *lastNode; /* The node for which output was most recently
339 static char *targPrefix = NULL; /* What we print at the start of TARG_FMT */
340 static Job tokenWaitJob; /* token wait pseudo-job */
342 static Job childExitJob; /* child exit pseudo-job */
343 #define CHILD_EXIT "."
344 #define DO_JOB_RESUME "R"
346 #define TARG_FMT "%s %s ---\n" /* Default format */
347 #define MESSAGE(fp, gn) \
348 if (maxJobs != 1 && targPrefix && *targPrefix) \
349 (void)fprintf(fp, TARG_FMT, targPrefix, gn->name)
351 static sigset_t caught_signals; /* Set of signals we handle */
353 #define KILLPG(pid, sig) kill(-(pid), (sig))
355 #define KILLPG(pid, sig) killpg((pid), (sig))
358 static void JobChildSig(int);
359 static void JobContinueSig(int);
360 static Job *JobFindPid(int, int, Boolean);
361 static int JobPrintCommand(void *, void *);
362 static int JobSaveCommand(void *, void *);
363 static void JobClose(Job *);
364 static void JobExec(Job *, char **);
365 static void JobMakeArgv(Job *, char **);
366 static int JobStart(GNode *, int);
367 static char *JobOutput(Job *, char *, char *, int);
368 static void JobDoOutput(Job *, Boolean);
369 static Shell *JobMatchShell(const char *);
370 static void JobInterrupt(int, int) MAKE_ATTR_DEAD;
371 static void JobRestartJobs(void);
372 static void JobTokenAdd(void);
373 static void JobSigLock(sigset_t *);
374 static void JobSigUnlock(sigset_t *);
375 static void JobSigReset(void);
377 const char *malloc_options="A";
380 job_table_dump(const char *where)
384 fprintf(debug_file, "job table @ %s\n", where);
385 for (job = job_table; job < job_table_end; job++) {
386 fprintf(debug_file, "job %d, status %d, flags %d, pid %d\n",
387 (int)(job - job_table), job->job_state, job->flags, job->pid);
392 * JobSigLock/JobSigUnlock
394 * Signal lock routines to get exclusive access. Currently used to
395 * protect `jobs' and `stoppedJobs' list manipulations.
397 static void JobSigLock(sigset_t *omaskp)
399 if (sigprocmask(SIG_BLOCK, &caught_signals, omaskp) != 0) {
400 Punt("JobSigLock: sigprocmask: %s", strerror(errno));
405 static void JobSigUnlock(sigset_t *omaskp)
407 (void)sigprocmask(SIG_SETMASK, omaskp, NULL);
411 JobCreatePipe(Job *job, int minfd)
415 if (pipe(job->jobPipe) == -1)
416 Punt("Cannot create pipe: %s", strerror(errno));
418 for (i = 0; i < 2; i++) {
419 /* Avoid using low numbered fds */
420 fd = fcntl(job->jobPipe[i], F_DUPFD, minfd);
422 close(job->jobPipe[i]);
423 job->jobPipe[i] = fd;
427 /* Set close-on-exec flag for both */
428 (void)fcntl(job->jobPipe[0], F_SETFD, 1);
429 (void)fcntl(job->jobPipe[1], F_SETFD, 1);
432 * We mark the input side of the pipe non-blocking; we poll(2) the
433 * pipe when we're waiting for a job token, but we might lose the
434 * race for the token when a new one becomes available, so the read
435 * from the pipe should not block.
437 fcntl(job->jobPipe[0], F_SETFL,
438 fcntl(job->jobPipe[0], F_GETFL, 0) | O_NONBLOCK);
442 *-----------------------------------------------------------------------
444 * Pass a signal to a job
447 * signop Signal to send it
450 * None, except the job may bite it.
452 *-----------------------------------------------------------------------
455 JobCondPassSig(int signo)
460 (void)fprintf(debug_file, "JobCondPassSig(%d) called.\n", signo);
463 for (job = job_table; job < job_table_end; job++) {
464 if (job->job_state != JOB_ST_RUNNING)
467 (void)fprintf(debug_file,
468 "JobCondPassSig passing signal %d to child %d.\n",
471 KILLPG(job->pid, signo);
476 *-----------------------------------------------------------------------
481 * signo The signal number we've received
487 * Sends a token on the child exit pipe to wake us up from
490 *-----------------------------------------------------------------------
493 JobChildSig(int signo MAKE_ATTR_UNUSED)
495 while (write(childExitJob.outPipe, CHILD_EXIT, 1) == -1 && errno == EAGAIN)
501 *-----------------------------------------------------------------------
503 * Resume all stopped jobs.
506 * signo The signal number we've received
512 * Jobs start running again.
514 *-----------------------------------------------------------------------
517 JobContinueSig(int signo MAKE_ATTR_UNUSED)
520 * Defer sending to SIGCONT to our stopped children until we return
521 * from the signal handler.
523 while (write(childExitJob.outPipe, DO_JOB_RESUME, 1) == -1 &&
529 *-----------------------------------------------------------------------
531 * Pass a signal on to all jobs, then resend to ourselves.
534 * signo The signal number we've received
540 * We die by the same signal.
542 *-----------------------------------------------------------------------
544 MAKE_ATTR_DEAD static void
545 JobPassSig_int(int signo)
547 /* Run .INTERRUPT target then exit */
548 JobInterrupt(TRUE, signo);
551 MAKE_ATTR_DEAD static void
552 JobPassSig_term(int signo)
554 /* Dont run .INTERRUPT target then exit */
555 JobInterrupt(FALSE, signo);
559 JobPassSig_suspend(int signo)
561 sigset_t nmask, omask;
562 struct sigaction act;
564 /* Suppress job started/continued messages */
567 /* Pass the signal onto every job */
568 JobCondPassSig(signo);
571 * Send ourselves the signal now we've given the message to everyone else.
572 * Note we block everything else possible while we're getting the signal.
573 * This ensures that all our jobs get continued when we wake up before
574 * we take any other signal.
577 sigdelset(&nmask, signo);
578 (void)sigprocmask(SIG_SETMASK, &nmask, &omask);
580 act.sa_handler = SIG_DFL;
581 sigemptyset(&act.sa_mask);
583 (void)sigaction(signo, &act, NULL);
586 (void)fprintf(debug_file,
587 "JobPassSig passing signal %d to self.\n", signo);
590 (void)kill(getpid(), signo);
593 * We've been continued.
595 * A whole host of signals continue to happen!
596 * SIGCHLD for any processes that actually suspended themselves.
597 * SIGCHLD for any processes that exited while we were alseep.
598 * The SIGCONT that actually caused us to wakeup.
600 * Since we defer passing the SIGCONT on to our children until
601 * the main processing loop, we can be sure that all the SIGCHLD
602 * events will have happened by then - and that the waitpid() will
603 * collect the child 'suspended' events.
604 * For correct sequencing we just need to ensure we process the
605 * waitpid() before passign on the SIGCONT.
607 * In any case nothing else is needed here.
610 /* Restore handler and signal mask */
611 act.sa_handler = JobPassSig_suspend;
612 (void)sigaction(signo, &act, NULL);
613 (void)sigprocmask(SIG_SETMASK, &omask, NULL);
617 *-----------------------------------------------------------------------
619 * Compare the pid of the job with the given pid and return 0 if they
620 * are equal. This function is called from Job_CatchChildren
621 * to find the job descriptor of the finished job.
625 * pid process id desired
628 * Job with matching pid
632 *-----------------------------------------------------------------------
635 JobFindPid(int pid, int status, Boolean isJobs)
639 for (job = job_table; job < job_table_end; job++) {
640 if ((job->job_state == status) && job->pid == pid)
643 if (DEBUG(JOB) && isJobs)
644 job_table_dump("no pid");
649 *-----------------------------------------------------------------------
651 * Put out another command for the given job. If the command starts
652 * with an @ or a - we process it specially. In the former case,
653 * so long as the -s and -n flags weren't given to make, we stick
654 * a shell-specific echoOff command in the script. In the latter,
655 * we ignore errors for the entire job, unless the shell has error
657 * If the command is just "..." we take all future commands for this
658 * job to be commands to be executed once the entire graph has been
659 * made and return non-zero to signal that the end of the commands
660 * was reached. These commands are later attached to the postCommands
661 * node and executed by Job_End when all things are done.
662 * This function is called from JobStart via Lst_ForEach.
665 * cmdp command string to print
666 * jobp job for which to print it
669 * Always 0, unless the command was "..."
672 * If the command begins with a '-' and the shell has no error control,
673 * the JOB_IGNERR flag is set in the job descriptor.
674 * If the command is "..." and we're not ignoring such things,
675 * tailCmds is set to the successor node of the cmd.
676 * numCommands is incremented if the command is actually printed.
677 *-----------------------------------------------------------------------
680 JobPrintCommand(void *cmdp, void *jobp)
682 Boolean noSpecials; /* true if we shouldn't worry about
683 * inserting special commands into
684 * the input stream. */
685 Boolean shutUp = FALSE; /* true if we put a no echo command
686 * into the command file */
687 Boolean errOff = FALSE; /* true if we turned error checking
688 * off before printing the command
689 * and need to turn it back on */
690 const char *cmdTemplate; /* Template to use when printing the
692 char *cmdStart; /* Start of expanded command */
693 char *escCmd = NULL; /* Command with quotes/backticks escaped */
694 char *cmd = (char *)cmdp;
695 Job *job = (Job *)jobp;
698 noSpecials = NoExecute(job->node);
700 if (strcmp(cmd, "...") == 0) {
701 job->node->type |= OP_SAVE_CMDS;
702 if ((job->flags & JOB_IGNDOTS) == 0) {
703 job->tailCmds = Lst_Succ(Lst_Member(job->node->commands,
710 #define DBPRINTF(fmt, arg) if (DEBUG(JOB)) { \
711 (void)fprintf(debug_file, fmt, arg); \
713 (void)fprintf(job->cmdFILE, fmt, arg); \
714 (void)fflush(job->cmdFILE);
718 cmdStart = cmd = Var_Subst(NULL, cmd, job->node, FALSE);
720 cmdTemplate = "%s\n";
723 * Check for leading @' and -'s to control echoing and error checking.
725 while (*cmd == '@' || *cmd == '-' || (*cmd == '+')) {
728 shutUp = DEBUG(LOUD) ? FALSE : TRUE;
731 job->flags |= JOB_IGNERR;
737 * We're not actually executing anything...
738 * but this one needs to be - use compat mode just for it.
740 CompatRunCommand(cmdp, job->node);
748 while (isspace((unsigned char) *cmd))
752 * If the shell doesn't have error control the alternate echo'ing will
753 * be done (to avoid showing additional error checking code)
754 * and this will need the characters '$ ` \ "' escaped
757 if (!commandShell->hasErrCtl) {
758 /* Worst that could happen is every char needs escaping. */
759 escCmd = bmake_malloc((strlen(cmd) * 2) + 1);
760 for (i = 0, j= 0; cmd[i] != '\0'; i++, j++) {
761 if (cmd[i] == '$' || cmd[i] == '`' || cmd[i] == '\\' ||
770 if (!(job->flags & JOB_SILENT) && !noSpecials &&
771 commandShell->hasEchoCtl) {
772 DBPRINTF("%s\n", commandShell->echoOff);
774 if (commandShell->hasErrCtl)
781 if (commandShell->hasErrCtl) {
783 * we don't want the error-control commands showing
784 * up either, so we turn off echoing while executing
785 * them. We could put another field in the shell
786 * structure to tell JobDoOutput to look for this
787 * string too, but why make it any more complex than
790 if (!(job->flags & JOB_SILENT) && !shutUp &&
791 commandShell->hasEchoCtl) {
792 DBPRINTF("%s\n", commandShell->echoOff);
793 DBPRINTF("%s\n", commandShell->ignErr);
794 DBPRINTF("%s\n", commandShell->echoOn);
796 DBPRINTF("%s\n", commandShell->ignErr);
798 } else if (commandShell->ignErr &&
799 (*commandShell->ignErr != '\0'))
802 * The shell has no error control, so we need to be
803 * weird to get it to ignore any errors from the command.
804 * If echoing is turned on, we turn it off and use the
805 * errCheck template to echo the command. Leave echoing
806 * off so the user doesn't see the weirdness we go through
807 * to ignore errors. Set cmdTemplate to use the weirdness
808 * instead of the simple "%s\n" template.
810 if (!(job->flags & JOB_SILENT) && !shutUp) {
811 if (commandShell->hasEchoCtl) {
812 DBPRINTF("%s\n", commandShell->echoOff);
814 DBPRINTF(commandShell->errCheck, escCmd);
818 DBPRINTF(commandShell->errCheck, escCmd);
821 cmdTemplate = commandShell->ignErr;
823 * The error ignoration (hee hee) is already taken care
824 * of by the ignErr template, so pretend error checking
837 * If errors are being checked and the shell doesn't have error control
838 * but does supply an errOut template, then setup commands to run
842 if (!commandShell->hasErrCtl && commandShell->errOut &&
843 (*commandShell->errOut != '\0')) {
844 if (!(job->flags & JOB_SILENT) && !shutUp) {
845 if (commandShell->hasEchoCtl) {
846 DBPRINTF("%s\n", commandShell->echoOff);
848 DBPRINTF(commandShell->errCheck, escCmd);
851 /* If it's a comment line or blank, treat as an ignored error */
852 if ((escCmd[0] == commandShell->commentChar) ||
854 cmdTemplate = commandShell->ignErr;
856 cmdTemplate = commandShell->errOut;
861 if (DEBUG(SHELL) && strcmp(shellName, "sh") == 0 &&
862 (job->flags & JOB_TRACED) == 0) {
863 DBPRINTF("set -%s\n", "x");
864 job->flags |= JOB_TRACED;
867 DBPRINTF(cmdTemplate, cmd);
873 * If echoing is already off, there's no point in issuing the
874 * echoOff command. Otherwise we issue it and pretend it was on
875 * for the whole command...
877 if (!shutUp && !(job->flags & JOB_SILENT) && commandShell->hasEchoCtl){
878 DBPRINTF("%s\n", commandShell->echoOff);
881 DBPRINTF("%s\n", commandShell->errCheck);
883 if (shutUp && commandShell->hasEchoCtl) {
884 DBPRINTF("%s\n", commandShell->echoOn);
890 *-----------------------------------------------------------------------
892 * Save a command to be executed when everything else is done.
893 * Callback function for JobFinish...
899 * The command is tacked onto the end of postCommands's commands list.
901 *-----------------------------------------------------------------------
904 JobSaveCommand(void *cmd, void *gn)
906 cmd = Var_Subst(NULL, (char *)cmd, (GNode *)gn, FALSE);
907 (void)Lst_AtEnd(postCommands->commands, cmd);
913 *-----------------------------------------------------------------------
915 * Called to close both input and output pipes when a job is finished.
921 * The file descriptors associated with the job are closed.
923 *-----------------------------------------------------------------------
929 (void)close(job->outPipe);
932 JobDoOutput(job, TRUE);
933 (void)close(job->inPipe);
938 *-----------------------------------------------------------------------
940 * Do final processing for the given job including updating
941 * parents and starting new jobs as available/necessary. Note
942 * that we pay no attention to the JOB_IGNERR flag here.
943 * This is because when we're called because of a noexecute flag
944 * or something, jstat.w_status is 0 and when called from
945 * Job_CatchChildren, the status is zeroed if it s/b ignored.
949 * status sub-why job went away
955 * Final commands for the job are placed on postCommands.
957 * If we got an error and are aborting (aborting == ABORT_ERROR) and
958 * the job list is now empty, we are done for the day.
959 * If we recognized an error (errors !=0), we set the aborting flag
960 * to ABORT_ERROR so no more jobs will be started.
961 *-----------------------------------------------------------------------
965 JobFinish (Job *job, WAIT_T status)
967 Boolean done, return_job_token;
970 fprintf(debug_file, "Jobfinish: %d [%s], status %d\n",
971 job->pid, job->node->name, status);
974 if ((WIFEXITED(status) &&
975 (((WEXITSTATUS(status) != 0) && !(job->flags & JOB_IGNERR)))) ||
979 * If it exited non-zero and either we're doing things our
980 * way or we're not ignoring errors, the job is finished.
981 * Similarly, if the shell died because of a signal
982 * the job is also finished. In these
983 * cases, finish out the job's output before printing the exit
987 if (job->cmdFILE != NULL && job->cmdFILE != stdout) {
988 (void)fclose(job->cmdFILE);
992 } else if (WIFEXITED(status)) {
994 * Deal with ignored errors in -B mode. We need to print a message
995 * telling of the ignored error as well as setting status.w_status
996 * to 0 so the next command gets run. To do this, we set done to be
997 * TRUE if in -B mode and the job exited non-zero.
999 done = WEXITSTATUS(status) != 0;
1001 * Old comment said: "Note we don't
1002 * want to close down any of the streams until we know we're at the
1004 * But we do. Otherwise when are we going to print the rest of the
1010 * No need to close things down or anything.
1016 if (WIFEXITED(status)) {
1018 (void)fprintf(debug_file, "Process %d [%s] exited.\n",
1019 job->pid, job->node->name);
1021 if (WEXITSTATUS(status) != 0) {
1022 if (job->node != lastNode) {
1023 MESSAGE(stdout, job->node);
1024 lastNode = job->node;
1028 meta_job_error(job, job->node, job->flags, WEXITSTATUS(status));
1031 (void)printf("*** [%s] Error code %d%s\n",
1033 WEXITSTATUS(status),
1034 (job->flags & JOB_IGNERR) ? " (ignored)" : "");
1035 if (job->flags & JOB_IGNERR) {
1036 WAIT_STATUS(status) = 0;
1038 PrintOnError(job->node, NULL);
1040 } else if (DEBUG(JOB)) {
1041 if (job->node != lastNode) {
1042 MESSAGE(stdout, job->node);
1043 lastNode = job->node;
1045 (void)printf("*** [%s] Completed successfully\n",
1049 if (job->node != lastNode) {
1050 MESSAGE(stdout, job->node);
1051 lastNode = job->node;
1053 (void)printf("*** [%s] Signal %d\n",
1054 job->node->name, WTERMSIG(status));
1056 (void)fflush(stdout);
1061 meta_job_finish(job);
1065 return_job_token = FALSE;
1067 Trace_Log(JOBEND, job);
1068 if (!(job->flags & JOB_SPECIAL)) {
1069 if ((WAIT_STATUS(status) != 0) ||
1070 (aborting == ABORT_ERROR) ||
1071 (aborting == ABORT_INTERRUPT))
1072 return_job_token = TRUE;
1075 if ((aborting != ABORT_ERROR) && (aborting != ABORT_INTERRUPT) &&
1076 (WAIT_STATUS(status) == 0)) {
1078 * As long as we aren't aborting and the job didn't return a non-zero
1079 * status that we shouldn't ignore, we call Make_Update to update
1080 * the parents. In addition, any saved commands for the node are placed
1081 * on the .END target.
1083 if (job->tailCmds != NULL) {
1084 Lst_ForEachFrom(job->node->commands, job->tailCmds,
1088 job->node->made = MADE;
1089 if (!(job->flags & JOB_SPECIAL))
1090 return_job_token = TRUE;
1091 Make_Update(job->node);
1092 job->job_state = JOB_ST_FREE;
1093 } else if (WAIT_STATUS(status)) {
1095 job->job_state = JOB_ST_FREE;
1099 * Set aborting if any error.
1101 if (errors && !keepgoing && (aborting != ABORT_INTERRUPT)) {
1103 * If we found any errors in this batch of children and the -k flag
1104 * wasn't given, we set the aborting flag so no more jobs get
1107 aborting = ABORT_ERROR;
1110 if (return_job_token)
1113 if (aborting == ABORT_ERROR && jobTokensRunning == 0) {
1115 * If we are aborting and the job table is now empty, we finish.
1122 *-----------------------------------------------------------------------
1124 * Touch the given target. Called by JobStart when the -t flag was
1128 * gn the node of the file to touch
1129 * silent TRUE if should not print message
1135 * The data modification of the file is changed. In addition, if the
1136 * file did not exist, it is created.
1137 *-----------------------------------------------------------------------
1140 Job_Touch(GNode *gn, Boolean silent)
1142 int streamID; /* ID of stream opened to do the touch */
1143 struct utimbuf times; /* Times for utime() call */
1145 if (gn->type & (OP_JOIN|OP_USE|OP_USEBEFORE|OP_EXEC|OP_OPTIONAL|
1146 OP_SPECIAL|OP_PHONY)) {
1148 * .JOIN, .USE, .ZEROTIME and .OPTIONAL targets are "virtual" targets
1149 * and, as such, shouldn't really be created.
1154 if (!silent || NoExecute(gn)) {
1155 (void)fprintf(stdout, "touch %s\n", gn->name);
1156 (void)fflush(stdout);
1159 if (NoExecute(gn)) {
1163 if (gn->type & OP_ARCHV) {
1165 } else if (gn->type & OP_LIB) {
1168 char *file = gn->path ? gn->path : gn->name;
1170 times.actime = times.modtime = now;
1171 if (utime(file, ×) < 0){
1172 streamID = open(file, O_RDWR | O_CREAT, 0666);
1174 if (streamID >= 0) {
1178 * Read and write a byte to the file to change the
1179 * modification time, then close the file.
1181 if (read(streamID, &c, 1) == 1) {
1182 (void)lseek(streamID, (off_t)0, SEEK_SET);
1183 while (write(streamID, &c, 1) == -1 && errno == EAGAIN)
1187 (void)close(streamID);
1189 (void)fprintf(stdout, "*** couldn't touch %s: %s",
1190 file, strerror(errno));
1191 (void)fflush(stdout);
1198 *-----------------------------------------------------------------------
1199 * Job_CheckCommands --
1200 * Make sure the given node has all the commands it needs.
1203 * gn The target whose commands need verifying
1204 * abortProc Function to abort with message
1207 * TRUE if the commands list is/was ok.
1210 * The node will have commands from the .DEFAULT rule added to it
1212 *-----------------------------------------------------------------------
1215 Job_CheckCommands(GNode *gn, void (*abortProc)(const char *, ...))
1217 if (OP_NOP(gn->type) && Lst_IsEmpty(gn->commands) &&
1218 ((gn->type & OP_LIB) == 0 || Lst_IsEmpty(gn->children))) {
1220 * No commands. Look for .DEFAULT rule from which we might infer
1223 if ((DEFAULT != NULL) && !Lst_IsEmpty(DEFAULT->commands) &&
1224 (gn->type & OP_SPECIAL) == 0) {
1227 * Make only looks for a .DEFAULT if the node was never the
1228 * target of an operator, so that's what we do too. If
1229 * a .DEFAULT was given, we substitute its commands for gn's
1230 * commands and set the IMPSRC variable to be the target's name
1231 * The DEFAULT node acts like a transformation rule, in that
1232 * gn also inherits any attributes or sources attached to
1235 Make_HandleUse(DEFAULT, gn);
1236 Var_Set(IMPSRC, Var_Value(TARGET, gn, &p1), gn, 0);
1239 } else if (Dir_MTime(gn, 0) == 0 && (gn->type & OP_SPECIAL) == 0) {
1241 * The node wasn't the target of an operator we have no .DEFAULT
1242 * rule to go on and the target doesn't already exist. There's
1243 * nothing more we can do for this branch. If the -k flag wasn't
1244 * given, we stop in our tracks, otherwise we just don't update
1245 * this node's parents so they never get examined.
1247 static const char msg[] = ": don't know how to make";
1249 if (gn->flags & FROM_DEPEND) {
1250 if (!Job_RunTarget(".STALE", gn->fname))
1251 fprintf(stdout, "%s: %s, %d: ignoring stale %s for %s\n",
1252 progname, gn->fname, gn->lineno, makeDependfile,
1257 if (gn->type & OP_OPTIONAL) {
1258 (void)fprintf(stdout, "%s%s %s (ignored)\n", progname,
1260 (void)fflush(stdout);
1261 } else if (keepgoing) {
1262 (void)fprintf(stdout, "%s%s %s (continuing)\n", progname,
1264 (void)fflush(stdout);
1267 (*abortProc)("%s%s %s. Stop", progname, msg, gn->name);
1276 *-----------------------------------------------------------------------
1278 * Execute the shell for the given job. Called from JobStart
1281 * job Job to execute
1287 * A shell is executed, outputs is altered and the Job structure added
1290 *-----------------------------------------------------------------------
1293 JobExec(Job *job, char **argv)
1295 int cpid; /* ID of new child */
1298 job->flags &= ~JOB_TRACED;
1303 (void)fprintf(debug_file, "Running %s %sly\n", job->node->name, "local");
1304 (void)fprintf(debug_file, "\tCommand: ");
1305 for (i = 0; argv[i] != NULL; i++) {
1306 (void)fprintf(debug_file, "%s ", argv[i]);
1308 (void)fprintf(debug_file, "\n");
1312 * Some jobs produce no output and it's disconcerting to have
1313 * no feedback of their running (since they produce no output, the
1314 * banner with their name in it never appears). This is an attempt to
1315 * provide that feedback, even if nothing follows it.
1317 if ((lastNode != job->node) && !(job->flags & JOB_SILENT)) {
1318 MESSAGE(stdout, job->node);
1319 lastNode = job->node;
1322 /* No interruptions until this job is on the `jobs' list */
1325 /* Pre-emptively mark job running, pid still zero though */
1326 job->job_state = JOB_ST_RUNNING;
1330 Punt("Cannot vfork: %s", strerror(errno));
1338 meta_job_child(job);
1342 * Reset all signal handlers; this is necessary because we also
1343 * need to unblock signals before we exec(2).
1347 /* Now unblock signals */
1348 sigemptyset(&tmask);
1349 JobSigUnlock(&tmask);
1352 * Must duplicate the input stream down to the child's input and
1353 * reset it to the beginning (again). Since the stream was marked
1354 * close-on-exec, we must clear that bit in the new input.
1356 if (dup2(FILENO(job->cmdFILE), 0) == -1) {
1357 execError("dup2", "job->cmdFILE");
1360 (void)fcntl(0, F_SETFD, 0);
1361 (void)lseek(0, (off_t)0, SEEK_SET);
1364 * Always pass job token pipe to submakes. In the previous version
1365 * only the OP_MAKE flag was checked, which simply doesn't catch all
1366 * situtions and can lead to a massive multiplication of jobs. This
1367 * may have been corrected with OR OP_SUBMAKE, but until this is
1368 * known for sure, keep the original modication in place
1370 * if (job->node->type & (OP_MAKE | OP_SUBMAKE))
1374 * Pass job token pipe to submakes.
1376 fcntl(tokenWaitJob.inPipe, F_SETFD, 0);
1377 fcntl(tokenWaitJob.outPipe, F_SETFD, 0);
1381 * Set up the child's output to be routed through the pipe
1382 * we've created for it.
1384 if (dup2(job->outPipe, 1) == -1) {
1385 execError("dup2", "job->outPipe");
1389 * The output channels are marked close on exec. This bit was
1390 * duplicated by the dup2(on some systems), so we have to clear
1391 * it before routing the shell's error output to the same place as
1392 * its standard output.
1394 (void)fcntl(1, F_SETFD, 0);
1395 if (dup2(1, 2) == -1) {
1396 execError("dup2", "1, 2");
1401 * We want to switch the child into a different process family so
1402 * we can kill it and all its descendants in one fell swoop,
1403 * by killing its process family, but not commit suicide.
1405 #if defined(HAVE_SETPGID)
1406 (void)setpgid(0, getpid());
1408 #if defined(HAVE_SETSID)
1409 /* XXX: dsl - I'm sure this should be setpgrp()... */
1412 (void)setpgrp(0, getpid());
1418 (void)execv(shellPath, argv);
1419 execError("exec", shellPath);
1423 /* Parent, continuing after the child exec */
1426 Trace_Log(JOBSTART, job);
1429 * Set the current position in the buffer to the beginning
1430 * and mark another stream to watch in the outputs mask
1436 if (job->cmdFILE != NULL && job->cmdFILE != stdout) {
1437 (void)fclose(job->cmdFILE);
1438 job->cmdFILE = NULL;
1442 * Now the job is actually running, add it to the table.
1445 fprintf(debug_file, "JobExec(%s): pid %d added to jobs table\n",
1446 job->node->name, job->pid);
1447 job_table_dump("job started");
1449 JobSigUnlock(&mask);
1453 *-----------------------------------------------------------------------
1455 * Create the argv needed to execute the shell for a given job.
1462 *-----------------------------------------------------------------------
1465 JobMakeArgv(Job *job, char **argv)
1468 static char args[10]; /* For merged arguments */
1470 argv[0] = UNCONST(shellName);
1473 if ((commandShell->exit && (*commandShell->exit != '-')) ||
1474 (commandShell->echo && (*commandShell->echo != '-')))
1477 * At least one of the flags doesn't have a minus before it, so
1478 * merge them together. Have to do this because the *(&(@*#*&#$#
1479 * Bourne shell thinks its second argument is a file to source.
1480 * Grrrr. Note the ten-character limitation on the combined arguments.
1482 (void)snprintf(args, sizeof(args), "-%s%s",
1483 ((job->flags & JOB_IGNERR) ? "" :
1484 (commandShell->exit ? commandShell->exit : "")),
1485 ((job->flags & JOB_SILENT) ? "" :
1486 (commandShell->echo ? commandShell->echo : "")));
1493 if (!(job->flags & JOB_IGNERR) && commandShell->exit) {
1494 argv[argc] = UNCONST(commandShell->exit);
1497 if (!(job->flags & JOB_SILENT) && commandShell->echo) {
1498 argv[argc] = UNCONST(commandShell->echo);
1506 *-----------------------------------------------------------------------
1508 * Start a target-creation process going for the target described
1509 * by the graph node gn.
1512 * gn target to create
1513 * flags flags for the job to override normal ones.
1514 * e.g. JOB_SPECIAL or JOB_IGNDOTS
1515 * previous The previous Job structure for this node, if any.
1518 * JOB_ERROR if there was an error in the commands, JOB_FINISHED
1519 * if there isn't actually anything left to do for the job and
1520 * JOB_RUNNING if the job has been started.
1523 * A new Job node is created and added to the list of running
1524 * jobs. PMake is forked and a child shell created.
1526 * NB: I'm fairly sure that this code is never called with JOB_SPECIAL set
1527 * JOB_IGNDOTS is never set (dsl)
1528 * Also the return value is ignored by everyone.
1529 *-----------------------------------------------------------------------
1532 JobStart(GNode *gn, int flags)
1534 Job *job; /* new job descriptor */
1535 char *argv[10]; /* Argument vector to shell */
1536 Boolean cmdsOK; /* true if the nodes commands were all right */
1537 Boolean noExec; /* Set true if we decide not to run the job */
1538 int tfd; /* File descriptor to the temp file */
1540 for (job = job_table; job < job_table_end; job++) {
1541 if (job->job_state == JOB_ST_FREE)
1544 if (job >= job_table_end)
1545 Punt("JobStart no job slots vacant");
1547 memset(job, 0, sizeof *job);
1548 job->job_state = JOB_ST_SETUP;
1549 if (gn->type & OP_SPECIAL)
1550 flags |= JOB_SPECIAL;
1553 job->tailCmds = NULL;
1556 * Set the initial value of the flags for this job based on the global
1557 * ones and the node's attributes... Any flags supplied by the caller
1558 * are also added to the field.
1561 if (Targ_Ignore(gn)) {
1562 job->flags |= JOB_IGNERR;
1564 if (Targ_Silent(gn)) {
1565 job->flags |= JOB_SILENT;
1567 job->flags |= flags;
1570 * Check the commands now so any attributes from .DEFAULT have a chance
1571 * to migrate to the node
1573 cmdsOK = Job_CheckCommands(gn, Error);
1575 job->inPollfd = NULL;
1577 * If the -n flag wasn't given, we open up OUR (not the child's)
1578 * temporary file to stuff commands in it. The thing is rd/wr so we don't
1579 * need to reopen it to feed it to the shell. If the -n flag *was* given,
1580 * we just set the file to be stdout. Cute, huh?
1582 if (((gn->type & OP_MAKE) && !(noRecursiveExecute)) ||
1583 (!noExecute && !touchFlag)) {
1585 * tfile is the name of a file into which all shell commands are
1586 * put. It is removed before the child shell is executed, unless
1587 * DEBUG(SCRIPT) is set.
1592 * We're serious here, but if the commands were bogus, we're
1596 PrintOnError(gn, NULL); /* provide some clue */
1601 tfd = mkTempFile(TMPPAT, &tfile);
1603 (void)eunlink(tfile);
1604 JobSigUnlock(&mask);
1606 job->cmdFILE = fdopen(tfd, "w+");
1607 if (job->cmdFILE == NULL) {
1608 Punt("Could not fdopen %s", tfile);
1610 (void)fcntl(FILENO(job->cmdFILE), F_SETFD, 1);
1612 * Send the commands to the command file, flush all its buffers then
1613 * rewind and remove the thing.
1619 meta_job_start(job, gn);
1620 if (Targ_Silent(gn)) { /* might have changed */
1621 job->flags |= JOB_SILENT;
1626 * We can do all the commands at once. hooray for sanity
1629 Lst_ForEach(gn->commands, JobPrintCommand, job);
1632 * If we didn't print out any commands to the shell script,
1633 * there's not much point in executing the shell, is there?
1635 if (numCommands == 0) {
1640 } else if (NoExecute(gn)) {
1642 * Not executing anything -- just print all the commands to stdout
1643 * in one fell swoop. This will still set up job->tailCmds correctly.
1645 if (lastNode != gn) {
1646 MESSAGE(stdout, gn);
1649 job->cmdFILE = stdout;
1651 * Only print the commands if they're ok, but don't die if they're
1652 * not -- just let the user know they're bad and keep going. It
1653 * doesn't do any harm in this case and may do some good.
1656 Lst_ForEach(gn->commands, JobPrintCommand, job);
1659 * Don't execute the shell, thank you.
1664 * Just touch the target and note that no shell should be executed.
1665 * Set cmdFILE to stdout to make life easier. Check the commands, too,
1666 * but don't die if they're no good -- it does no harm to keep working
1669 job->cmdFILE = stdout;
1670 Job_Touch(gn, job->flags&JOB_SILENT);
1673 /* Just in case it isn't already... */
1674 (void)fflush(job->cmdFILE);
1677 * If we're not supposed to execute a shell, don't.
1680 if (!(job->flags & JOB_SPECIAL))
1683 * Unlink and close the command file if we opened one
1685 if (job->cmdFILE != stdout) {
1686 if (job->cmdFILE != NULL) {
1687 (void)fclose(job->cmdFILE);
1688 job->cmdFILE = NULL;
1693 * We only want to work our way up the graph if we aren't here because
1694 * the commands for the job were no good.
1696 if (cmdsOK && aborting == 0) {
1697 if (job->tailCmds != NULL) {
1698 Lst_ForEachFrom(job->node->commands, job->tailCmds,
1702 job->node->made = MADE;
1703 Make_Update(job->node);
1705 job->job_state = JOB_ST_FREE;
1706 return cmdsOK ? JOB_FINISHED : JOB_ERROR;
1710 * Set up the control arguments to the shell. This is based on the flags
1711 * set earlier for this job.
1713 JobMakeArgv(job, argv);
1715 /* Create the pipe by which we'll get the shell's output. */
1716 JobCreatePipe(job, 3);
1719 return(JOB_RUNNING);
1723 JobOutput(Job *job, char *cp, char *endp, int msg)
1727 if (commandShell->noPrint) {
1728 ecp = Str_FindSubstring(cp, commandShell->noPrint);
1729 while (ecp != NULL) {
1732 if (!beSilent && msg && job->node != lastNode) {
1733 MESSAGE(stdout, job->node);
1734 lastNode = job->node;
1737 * The only way there wouldn't be a newline after
1738 * this line is if it were the last in the buffer.
1739 * however, since the non-printable comes after it,
1740 * there must be a newline, so we don't print one.
1742 (void)fprintf(stdout, "%s", cp);
1743 (void)fflush(stdout);
1745 cp = ecp + commandShell->noPLen;
1748 * Still more to print, look again after skipping
1749 * the whitespace following the non-printable
1753 while (*cp == ' ' || *cp == '\t' || *cp == '\n') {
1756 ecp = Str_FindSubstring(cp, commandShell->noPrint);
1766 *-----------------------------------------------------------------------
1768 * This function is called at different times depending on
1769 * whether the user has specified that output is to be collected
1770 * via pipes or temporary files. In the former case, we are called
1771 * whenever there is something to read on the pipe. We collect more
1772 * output from the given job and store it in the job's outBuf. If
1773 * this makes up a line, we print it tagged by the job's identifier,
1775 * If output has been collected in a temporary file, we open the
1776 * file and read it line by line, transfering it to our own
1777 * output channel until the file is empty. At which point we
1778 * remove the temporary file.
1779 * In both cases, however, we keep our figurative eye out for the
1780 * 'noPrint' line for the shell from which the output came. If
1781 * we recognize a line, we don't print it. If the command is not
1782 * alone on the line (the character after it is not \0 or \n), we
1783 * do print whatever follows it.
1786 * job the job whose output needs printing
1787 * finish TRUE if this is the last time we'll be called
1794 * curPos may be shifted as may the contents of outBuf.
1795 *-----------------------------------------------------------------------
1798 JobDoOutput(Job *job, Boolean finish)
1800 Boolean gotNL = FALSE; /* true if got a newline */
1801 Boolean fbuf; /* true if our buffer filled up */
1802 int nr; /* number of bytes read */
1803 int i; /* auxiliary index into outBuf */
1804 int max; /* limit for i (end of current data) */
1805 int nRead; /* (Temporary) number of bytes read */
1808 * Read as many bytes as will fit in the buffer.
1814 nRead = read(job->inPipe, &job->outBuf[job->curPos],
1815 JOB_BUFSIZE - job->curPos);
1817 if (errno == EAGAIN)
1820 perror("JobDoOutput(piperead)");
1828 * If we hit the end-of-file (the job is dead), we must flush its
1829 * remaining output, so pretend we read a newline if there's any
1830 * output remaining in the buffer.
1831 * Also clear the 'finish' flag so we stop looping.
1833 if ((nr == 0) && (job->curPos != 0)) {
1834 job->outBuf[job->curPos] = '\n';
1837 } else if (nr == 0) {
1842 * Look for the last newline in the bytes we just got. If there is
1843 * one, break out of the loop with 'i' as its index and gotNL set
1846 max = job->curPos + nr;
1847 for (i = job->curPos + nr - 1; i >= job->curPos; i--) {
1848 if (job->outBuf[i] == '\n') {
1851 } else if (job->outBuf[i] == '\0') {
1855 job->outBuf[i] = ' ';
1861 if (job->curPos == JOB_BUFSIZE) {
1863 * If we've run out of buffer space, we have no choice
1864 * but to print the stuff. sigh.
1870 if (gotNL || fbuf) {
1872 * Need to send the output to the screen. Null terminate it
1873 * first, overwriting the newline character if there was one.
1874 * So long as the line isn't one we should filter (according
1875 * to the shell description), we print the line, preceded
1876 * by a target banner if this target isn't the same as the
1877 * one for which we last printed something.
1878 * The rest of the data in the buffer are then shifted down
1879 * to the start of the buffer and curPos is set accordingly.
1881 job->outBuf[i] = '\0';
1882 if (i >= job->curPos) {
1885 cp = JobOutput(job, job->outBuf, &job->outBuf[i], FALSE);
1888 * There's still more in that thar buffer. This time, though,
1889 * we know there's no newline at the end, so we add one of
1890 * our own free will.
1893 if (!beSilent && job->node != lastNode) {
1894 MESSAGE(stdout, job->node);
1895 lastNode = job->node;
1899 meta_job_output(job, cp, gotNL ? "\n" : "");
1902 (void)fprintf(stdout, "%s%s", cp, gotNL ? "\n" : "");
1903 (void)fflush(stdout);
1907 /* shift the remaining characters down */
1908 (void)memcpy(job->outBuf, &job->outBuf[i + 1], max - (i + 1));
1909 job->curPos = max - (i + 1);
1913 * We have written everything out, so we just start over
1914 * from the start of the buffer. No copying. No nothing.
1921 * If the finish flag is true, we must loop until we hit
1922 * end-of-file on the pipe. This is guaranteed to happen
1923 * eventually since the other end of the pipe is now closed
1924 * (we closed it explicitly and the child has exited). When
1925 * we do get an EOF, finish will be set FALSE and we'll fall
1937 * Unfortunately it is too complicated to run .BEGIN, .END,
1938 * and .INTERRUPT job in the parallel job module. This has
1939 * the nice side effect that it avoids a lot of other problems.
1941 Lst lst = Lst_Init(FALSE);
1942 Lst_AtEnd(lst, targ);
1943 (void)Make_Run(lst);
1944 Lst_Destroy(lst, NULL);
1945 JobStart(targ, JOB_SPECIAL);
1946 while (jobTokensRunning) {
1950 Compat_Make(targ, targ);
1951 if (targ->made == ERROR) {
1952 PrintOnError(targ, "\n\nStop.");
1959 *-----------------------------------------------------------------------
1960 * Job_CatchChildren --
1961 * Handle the exit of a child. Called from Make_Make.
1964 * block TRUE if should block on the wait
1970 * The job descriptor is removed from the list of children.
1973 * We do waits, blocking or not, according to the wisdom of our
1974 * caller, until there are no more children to report. For each
1975 * job, call JobFinish to finish things off.
1977 *-----------------------------------------------------------------------
1981 Job_CatchChildren(void)
1983 int pid; /* pid of dead child */
1984 WAIT_T status; /* Exit/termination status */
1987 * Don't even bother if we know there's no one around.
1989 if (jobTokensRunning == 0)
1992 while ((pid = waitpid((pid_t) -1, &status, WNOHANG | WUNTRACED)) > 0) {
1994 (void)fprintf(debug_file, "Process %d exited/stopped status %x.\n", pid,
1995 WAIT_STATUS(status));
1997 JobReapChild(pid, status, TRUE);
2002 * It is possible that wait[pid]() was called from elsewhere,
2003 * this lets us reap jobs regardless.
2006 JobReapChild(pid_t pid, WAIT_T status, Boolean isJobs)
2008 Job *job; /* job descriptor for dead child */
2011 * Don't even bother if we know there's no one around.
2013 if (jobTokensRunning == 0)
2016 job = JobFindPid(pid, JOB_ST_RUNNING, isJobs);
2019 if (!lurking_children)
2020 Error("Child (%d) status %x not in table?", pid, status);
2022 return; /* not ours */
2024 if (WIFSTOPPED(status)) {
2026 (void)fprintf(debug_file, "Process %d (%s) stopped.\n",
2027 job->pid, job->node->name);
2029 if (!make_suspended) {
2030 switch (WSTOPSIG(status)) {
2032 (void)printf("*** [%s] Suspended\n", job->node->name);
2035 (void)printf("*** [%s] Stopped\n", job->node->name);
2038 (void)printf("*** [%s] Stopped -- signal %d\n",
2039 job->node->name, WSTOPSIG(status));
2041 job->job_suspended = 1;
2043 (void)fflush(stdout);
2047 job->job_state = JOB_ST_FINISHED;
2048 job->exit_status = WAIT_STATUS(status);
2050 JobFinish(job, status);
2054 *-----------------------------------------------------------------------
2055 * Job_CatchOutput --
2056 * Catch the output from our children, if we're using
2057 * pipes do so. Otherwise just block time until we get a
2058 * signal(most likely a SIGCHLD) since there's no point in
2059 * just spinning when there's nothing to do and the reaping
2060 * of a child can wait for a while.
2066 * Output is read from pipes if we're piping.
2067 * -----------------------------------------------------------------------
2070 Job_CatchOutput(void)
2076 (void)fflush(stdout);
2078 /* The first fd in the list is the job token pipe */
2080 nready = poll(fds + 1 - wantToken, nfds - 1 + wantToken, POLL_MSEC);
2081 } while (nready < 0 && errno == EINTR);
2084 Punt("poll: %s", strerror(errno));
2086 if (nready > 0 && readyfd(&childExitJob)) {
2089 count = read(childExitJob.inPipe, &token, 1);
2092 Punt("unexpected eof on token pipe");
2094 Punt("token pipe read: %s", strerror(errno));
2096 if (token == DO_JOB_RESUME[0])
2097 /* Complete relay requested from our SIGCONT handler */
2106 Job_CatchChildren();
2110 for (i = 2; i < nfds; i++) {
2111 if (!fds[i].revents)
2114 if (job->job_state == JOB_ST_RUNNING)
2115 JobDoOutput(job, FALSE);
2122 *-----------------------------------------------------------------------
2124 * Start the creation of a target. Basically a front-end for
2125 * JobStart used by the Make module.
2131 * Another job is started.
2133 *-----------------------------------------------------------------------
2138 (void)JobStart(gn, 0);
2144 if (shellPath == NULL) {
2146 * We are using the default shell, which may be an absolute
2147 * path if DEFSHELL_CUSTOM is defined.
2149 shellName = commandShell->name;
2150 #ifdef DEFSHELL_CUSTOM
2151 if (*shellName == '/') {
2152 shellPath = shellName;
2153 shellName = strrchr(shellPath, '/');
2157 shellPath = str_concat(_PATH_DEFSHELLDIR, shellName, STR_ADDSLASH);
2159 if (commandShell->exit == NULL) {
2160 commandShell->exit = "";
2162 if (commandShell->echo == NULL) {
2163 commandShell->echo = "";
2165 if (commandShell->hasErrCtl && *commandShell->exit) {
2167 strcmp(commandShell->exit, &shellErrFlag[1]) != 0) {
2169 shellErrFlag = NULL;
2171 if (!shellErrFlag) {
2172 int n = strlen(commandShell->exit) + 2;
2174 shellErrFlag = bmake_malloc(n);
2176 snprintf(shellErrFlag, n, "-%s", commandShell->exit);
2179 } else if (shellErrFlag) {
2181 shellErrFlag = NULL;
2186 * Returns the string literal that is used in the current command shell
2187 * to produce a newline character.
2190 Shell_GetNewline(void)
2193 return commandShell->newline;
2202 } else if (!Var_Exists(MAKE_JOB_PREFIX, VAR_GLOBAL)) {
2203 Var_Set(MAKE_JOB_PREFIX, "---", VAR_GLOBAL, 0);
2206 targPrefix = Var_Subst(NULL, "${" MAKE_JOB_PREFIX "}", VAR_GLOBAL, 0);
2210 *-----------------------------------------------------------------------
2212 * Initialize the process module
2220 * lists and counters are initialized
2221 *-----------------------------------------------------------------------
2227 /* Allocate space for all the job info */
2228 job_table = bmake_malloc(maxJobs * sizeof *job_table);
2229 memset(job_table, 0, maxJobs * sizeof *job_table);
2230 job_table_end = job_table + maxJobs;
2239 * There is a non-zero chance that we already have children.
2240 * eg after 'make -f- <<EOF'
2241 * Since their termination causes a 'Child (pid) not in table' message,
2242 * Collect the status of any that are already dead, and suppress the
2243 * error message if there are any undead ones.
2247 rval = waitpid((pid_t) -1, &status, WNOHANG);
2251 lurking_children = 1;
2257 JobCreatePipe(&childExitJob, 3);
2259 /* We can only need to wait for tokens, children and output from each job */
2260 fds = bmake_malloc(sizeof (*fds) * (2 + maxJobs));
2261 jobfds = bmake_malloc(sizeof (*jobfds) * (2 + maxJobs));
2263 /* These are permanent entries and take slots 0 and 1 */
2264 watchfd(&tokenWaitJob);
2265 watchfd(&childExitJob);
2267 sigemptyset(&caught_signals);
2269 * Install a SIGCHLD handler.
2271 (void)bmake_signal(SIGCHLD, JobChildSig);
2272 sigaddset(&caught_signals, SIGCHLD);
2274 #define ADDSIG(s,h) \
2275 if (bmake_signal(s, SIG_IGN) != SIG_IGN) { \
2276 sigaddset(&caught_signals, s); \
2277 (void)bmake_signal(s, h); \
2281 * Catch the four signals that POSIX specifies if they aren't ignored.
2282 * JobPassSig will take care of calling JobInterrupt if appropriate.
2284 ADDSIG(SIGINT, JobPassSig_int)
2285 ADDSIG(SIGHUP, JobPassSig_term)
2286 ADDSIG(SIGTERM, JobPassSig_term)
2287 ADDSIG(SIGQUIT, JobPassSig_term)
2290 * There are additional signals that need to be caught and passed if
2291 * either the export system wants to be told directly of signals or if
2292 * we're giving each job its own process group (since then it won't get
2293 * signals from the terminal driver as we own the terminal)
2295 ADDSIG(SIGTSTP, JobPassSig_suspend)
2296 ADDSIG(SIGTTOU, JobPassSig_suspend)
2297 ADDSIG(SIGTTIN, JobPassSig_suspend)
2298 ADDSIG(SIGWINCH, JobCondPassSig)
2299 ADDSIG(SIGCONT, JobContinueSig)
2302 (void)Job_RunTarget(".BEGIN", NULL);
2303 postCommands = Targ_FindNode(".END", TARG_CREATE);
2306 static void JobSigReset(void)
2309 if (sigismember(&caught_signals, s)) { \
2310 (void)bmake_signal(s, SIG_DFL); \
2323 (void)bmake_signal(SIGCHLD, SIG_DFL);
2327 *-----------------------------------------------------------------------
2329 * Find a shell in 'shells' given its name.
2332 * A pointer to the Shell structure.
2337 *-----------------------------------------------------------------------
2340 JobMatchShell(const char *name)
2344 for (sh = shells; sh->name != NULL; sh++) {
2345 if (strcmp(name, sh->name) == 0)
2352 *-----------------------------------------------------------------------
2354 * Parse a shell specification and set up commandShell, shellPath
2355 * and shellName appropriately.
2358 * line The shell spec
2361 * FAILURE if the specification was incorrect.
2364 * commandShell points to a Shell structure (either predefined or
2365 * created from the shell spec), shellPath is the full path of the
2366 * shell described by commandShell, while shellName is just the
2367 * final component of shellPath.
2370 * A shell specification consists of a .SHELL target, with dependency
2371 * operator, followed by a series of blank-separated words. Double
2372 * quotes can be used to use blanks in words. A backslash escapes
2373 * anything (most notably a double-quote and a space) and
2374 * provides the functionality it does in C. Each word consists of
2375 * keyword and value separated by an equal sign. There should be no
2376 * unnecessary spaces in the word. The keywords are as follows:
2377 * name Name of shell.
2378 * path Location of shell.
2379 * quiet Command to turn off echoing.
2380 * echo Command to turn echoing on
2381 * filter Result of turning off echoing that shouldn't be
2383 * echoFlag Flag to turn echoing on at the start
2384 * errFlag Flag to turn error checking on at the start
2385 * hasErrCtl True if shell has error checking control
2386 * newline String literal to represent a newline char
2387 * check Command to turn on error checking if hasErrCtl
2388 * is TRUE or template of command to echo a command
2389 * for which error checking is off if hasErrCtl is
2391 * ignore Command to turn off error checking if hasErrCtl
2392 * is TRUE or template of command to execute a
2393 * command so as to ignore any errors it returns if
2394 * hasErrCtl is FALSE.
2396 *-----------------------------------------------------------------------
2399 Job_ParseShell(char *line)
2406 Boolean fullSpec = FALSE;
2409 while (isspace((unsigned char)*line)) {
2414 free(UNCONST(shellArgv));
2416 memset(&newShell, 0, sizeof(newShell));
2419 * Parse the specification by keyword
2421 words = brk_string(line, &argc, TRUE, &path);
2422 if (words == NULL) {
2423 Error("Unterminated quoted string [%s]", line);
2428 for (path = NULL, argv = words; argc != 0; argc--, argv++) {
2429 if (strncmp(*argv, "path=", 5) == 0) {
2431 } else if (strncmp(*argv, "name=", 5) == 0) {
2432 newShell.name = &argv[0][5];
2434 if (strncmp(*argv, "quiet=", 6) == 0) {
2435 newShell.echoOff = &argv[0][6];
2436 } else if (strncmp(*argv, "echo=", 5) == 0) {
2437 newShell.echoOn = &argv[0][5];
2438 } else if (strncmp(*argv, "filter=", 7) == 0) {
2439 newShell.noPrint = &argv[0][7];
2440 newShell.noPLen = strlen(newShell.noPrint);
2441 } else if (strncmp(*argv, "echoFlag=", 9) == 0) {
2442 newShell.echo = &argv[0][9];
2443 } else if (strncmp(*argv, "errFlag=", 8) == 0) {
2444 newShell.exit = &argv[0][8];
2445 } else if (strncmp(*argv, "hasErrCtl=", 10) == 0) {
2446 char c = argv[0][10];
2447 newShell.hasErrCtl = !((c != 'Y') && (c != 'y') &&
2448 (c != 'T') && (c != 't'));
2449 } else if (strncmp(*argv, "newline=", 8) == 0) {
2450 newShell.newline = &argv[0][8];
2451 } else if (strncmp(*argv, "check=", 6) == 0) {
2452 newShell.errCheck = &argv[0][6];
2453 } else if (strncmp(*argv, "ignore=", 7) == 0) {
2454 newShell.ignErr = &argv[0][7];
2455 } else if (strncmp(*argv, "errout=", 7) == 0) {
2456 newShell.errOut = &argv[0][7];
2457 } else if (strncmp(*argv, "comment=", 8) == 0) {
2458 newShell.commentChar = argv[0][8];
2460 Parse_Error(PARSE_FATAL, "Unknown keyword \"%s\"",
2471 * If no path was given, the user wants one of the pre-defined shells,
2472 * yes? So we find the one s/he wants with the help of JobMatchShell
2473 * and set things up the right way. shellPath will be set up by
2476 if (newShell.name == NULL) {
2477 Parse_Error(PARSE_FATAL, "Neither path nor name specified");
2481 if ((sh = JobMatchShell(newShell.name)) == NULL) {
2482 Parse_Error(PARSE_WARNING, "%s: No matching shell",
2488 shellName = newShell.name;
2490 /* Shell_Init has already been called! Do it again. */
2491 free(UNCONST(shellPath));
2498 * The user provided a path. If s/he gave nothing else (fullSpec is
2499 * FALSE), try and find a matching shell in the ones we know of.
2500 * Else we just take the specification at its word and copy it
2501 * to a new location. In either case, we need to record the
2502 * path the user gave for the shell.
2505 path = strrchr(path, '/');
2507 path = UNCONST(shellPath);
2511 if (newShell.name != NULL) {
2512 shellName = newShell.name;
2517 if ((sh = JobMatchShell(shellName)) == NULL) {
2518 Parse_Error(PARSE_WARNING, "%s: No matching shell",
2525 commandShell = bmake_malloc(sizeof(Shell));
2526 *commandShell = newShell;
2528 /* this will take care of shellErrFlag */
2532 if (commandShell->echoOn && commandShell->echoOff) {
2533 commandShell->hasEchoCtl = TRUE;
2536 if (!commandShell->hasErrCtl) {
2537 if (commandShell->errCheck == NULL) {
2538 commandShell->errCheck = "";
2540 if (commandShell->ignErr == NULL) {
2541 commandShell->ignErr = "%s\n";
2546 * Do not free up the words themselves, since they might be in use by the
2547 * shell specification.
2554 *-----------------------------------------------------------------------
2556 * Handle the receipt of an interrupt.
2559 * runINTERRUPT Non-zero if commands for the .INTERRUPT target
2560 * should be executed
2561 * signo signal received
2567 * All children are killed. Another job will be started if the
2568 * .INTERRUPT target was given.
2569 *-----------------------------------------------------------------------
2572 JobInterrupt(int runINTERRUPT, int signo)
2574 Job *job; /* job descriptor in that element */
2575 GNode *interrupt; /* the node describing the .INTERRUPT target */
2579 aborting = ABORT_INTERRUPT;
2583 for (job = job_table; job < job_table_end; job++) {
2584 if (job->job_state != JOB_ST_RUNNING)
2589 if ((gn->type & (OP_JOIN|OP_PHONY)) == 0 && !Targ_Precious(gn)) {
2590 char *file = (gn->path == NULL ? gn->name : gn->path);
2591 if (!noExecute && eunlink(file) != -1) {
2592 Error("*** %s removed", file);
2597 (void)fprintf(debug_file,
2598 "JobInterrupt passing signal %d to child %d.\n",
2601 KILLPG(job->pid, signo);
2605 JobSigUnlock(&mask);
2607 if (runINTERRUPT && !touchFlag) {
2608 interrupt = Targ_FindNode(".INTERRUPT", TARG_NOCREATE);
2609 if (interrupt != NULL) {
2610 ignoreErrors = FALSE;
2614 Trace_Log(MAKEINTR, 0);
2619 *-----------------------------------------------------------------------
2621 * Do final processing such as the running of the commands
2622 * attached to the .END target.
2625 * Number of errors reported.
2629 *-----------------------------------------------------------------------
2634 if (postCommands != NULL &&
2635 (!Lst_IsEmpty(postCommands->commands) ||
2636 !Lst_IsEmpty(postCommands->children))) {
2638 Error("Errors reported so .END ignored");
2640 JobRun(postCommands);
2647 *-----------------------------------------------------------------------
2649 * Cleanup any memory used by the jobs module
2656 *-----------------------------------------------------------------------
2668 *-----------------------------------------------------------------------
2670 * Waits for all running jobs to finish and returns. Sets 'aborting'
2671 * to ABORT_WAIT to prevent other jobs from starting.
2677 * Currently running jobs finish.
2679 *-----------------------------------------------------------------------
2684 aborting = ABORT_WAIT;
2685 while (jobTokensRunning != 0) {
2692 *-----------------------------------------------------------------------
2694 * Abort all currently running jobs without handling output or anything.
2695 * This function is to be called only in the event of a major
2696 * error. Most definitely NOT to be called from JobInterrupt.
2702 * All children are killed, not just the firstborn
2703 *-----------------------------------------------------------------------
2708 Job *job; /* the job descriptor in that element */
2711 aborting = ABORT_ERROR;
2713 if (jobTokensRunning) {
2714 for (job = job_table; job < job_table_end; job++) {
2715 if (job->job_state != JOB_ST_RUNNING)
2718 * kill the child process with increasingly drastic signals to make
2719 * darn sure it's dead.
2721 KILLPG(job->pid, SIGINT);
2722 KILLPG(job->pid, SIGKILL);
2727 * Catch as many children as want to report in at first, then give up
2729 while (waitpid((pid_t) -1, &foo, WNOHANG) > 0)
2735 *-----------------------------------------------------------------------
2737 * Tries to restart stopped jobs if there are slots available.
2738 * Called in process context in response to a SIGCONT.
2746 *-----------------------------------------------------------------------
2749 JobRestartJobs(void)
2753 for (job = job_table; job < job_table_end; job++) {
2754 if (job->job_state == JOB_ST_RUNNING &&
2755 (make_suspended || job->job_suspended)) {
2757 (void)fprintf(debug_file, "Restarting stopped job pid %d.\n",
2760 if (job->job_suspended) {
2761 (void)printf("*** [%s] Continued\n", job->node->name);
2762 (void)fflush(stdout);
2764 job->job_suspended = 0;
2765 if (KILLPG(job->pid, SIGCONT) != 0 && DEBUG(JOB)) {
2766 fprintf(debug_file, "Failed to send SIGCONT to %d\n", job->pid);
2769 if (job->job_state == JOB_ST_FINISHED)
2770 /* Job exit deferred after calling waitpid() in a signal handler */
2771 JobFinish(job, job->exit_status);
2779 if (job->inPollfd != NULL)
2780 Punt("Watching watched job");
2782 fds[nfds].fd = job->inPipe;
2783 fds[nfds].events = POLLIN;
2785 job->inPollfd = &fds[nfds];
2793 if (job->inPollfd == NULL)
2794 Punt("Unwatching unwatched job");
2795 i = job->inPollfd - fds;
2798 * Move last job in table into hole made by dead job.
2802 jobfds[i] = jobfds[nfds];
2803 jobfds[i]->inPollfd = &fds[i];
2805 job->inPollfd = NULL;
2811 if (job->inPollfd == NULL)
2812 Punt("Polling unwatched job");
2813 return (job->inPollfd->revents & POLLIN) != 0;
2817 *-----------------------------------------------------------------------
2819 * Put a token into the job pipe so that some make process can start
2823 * Allows more build jobs to be spawned somewhere.
2825 *-----------------------------------------------------------------------
2831 char tok = JOB_TOKENS[aborting], tok1;
2833 /* If we are depositing an error token flush everything else */
2834 while (tok != '+' && read(tokenWaitJob.inPipe, &tok1, 1) == 1)
2838 fprintf(debug_file, "(%d) aborting %d, deposit token %c\n",
2839 getpid(), aborting, JOB_TOKENS[aborting]);
2840 while (write(tokenWaitJob.outPipe, &tok, 1) == -1 && errno == EAGAIN)
2845 *-----------------------------------------------------------------------
2846 * Job_ServerStartTokenAdd --
2847 * Prep the job token pipe in the root make process.
2849 *-----------------------------------------------------------------------
2853 Job_ServerStart(int max_tokens, int jp_0, int jp_1)
2858 if (jp_0 >= 0 && jp_1 >= 0) {
2859 /* Pipe passed in from parent */
2860 tokenWaitJob.inPipe = jp_0;
2861 tokenWaitJob.outPipe = jp_1;
2862 (void)fcntl(jp_0, F_SETFD, 1);
2863 (void)fcntl(jp_1, F_SETFD, 1);
2867 JobCreatePipe(&tokenWaitJob, 15);
2869 snprintf(jobarg, sizeof(jobarg), "%d,%d",
2870 tokenWaitJob.inPipe, tokenWaitJob.outPipe);
2872 Var_Append(MAKEFLAGS, "-J", VAR_GLOBAL);
2873 Var_Append(MAKEFLAGS, jobarg, VAR_GLOBAL);
2876 * Preload the job pipe with one token per job, save the one
2877 * "extra" token for the primary job.
2879 * XXX should clip maxJobs against PIPE_BUF -- if max_tokens is
2880 * larger than the write buffer size of the pipe, we will
2883 for (i = 1; i < max_tokens; i++)
2888 *-----------------------------------------------------------------------
2889 * Job_TokenReturn --
2890 * Return a withdrawn token to the pool.
2892 *-----------------------------------------------------------------------
2896 Job_TokenReturn(void)
2899 if (jobTokensRunning < 0)
2900 Punt("token botch");
2901 if (jobTokensRunning || JOB_TOKENS[aborting] != '+')
2906 *-----------------------------------------------------------------------
2907 * Job_TokenWithdraw --
2908 * Attempt to withdraw a token from the pool.
2911 * Returns TRUE if a token was withdrawn, and FALSE if the pool
2912 * is currently empty.
2915 * If pool is empty, set wantToken so that we wake up
2916 * when a token is released.
2918 *-----------------------------------------------------------------------
2923 Job_TokenWithdraw(void)
2930 fprintf(debug_file, "Job_TokenWithdraw(%d): aborting %d, running %d\n",
2931 getpid(), aborting, jobTokensRunning);
2933 if (aborting || (jobTokensRunning >= maxJobs))
2936 count = read(tokenWaitJob.inPipe, &tok, 1);
2938 Fatal("eof on job pipe!");
2939 if (count < 0 && jobTokensRunning != 0) {
2940 if (errno != EAGAIN) {
2941 Fatal("job pipe read: %s", strerror(errno));
2944 fprintf(debug_file, "(%d) blocked for token\n", getpid());
2949 if (count == 1 && tok != '+') {
2950 /* make being abvorted - remove any other job tokens */
2952 fprintf(debug_file, "(%d) aborted by token %c\n", getpid(), tok);
2953 while (read(tokenWaitJob.inPipe, &tok1, 1) == 1)
2955 /* And put the stopper back */
2956 while (write(tokenWaitJob.outPipe, &tok, 1) == -1 && errno == EAGAIN)
2958 Fatal("A failure has been detected in another branch of the parallel make");
2961 if (count == 1 && jobTokensRunning == 0)
2962 /* We didn't want the token really */
2963 while (write(tokenWaitJob.outPipe, &tok, 1) == -1 && errno == EAGAIN)
2968 fprintf(debug_file, "(%d) withdrew token\n", getpid());
2973 *-----------------------------------------------------------------------
2975 * Run the named target if found. If a filename is specified, then
2976 * set that to the sources.
2982 * exits if the target fails.
2984 *-----------------------------------------------------------------------
2987 Job_RunTarget(const char *target, const char *fname) {
2988 GNode *gn = Targ_FindNode(target, TARG_NOCREATE);
2994 Var_Set(ALLSRC, fname, gn, 0);
2997 if (gn->made == ERROR) {
2998 PrintOnError(gn, "\n\nStop.");
3006 emul_poll(struct pollfd *fd, int nfd, int timeout)
3009 int i, maxfd, nselect, npoll;
3010 struct timeval tv, *tvp;
3017 for (i = 0; i < nfd; i++) {
3020 if (fd[i].events & POLLIN)
3021 FD_SET(fd[i].fd, &rfds);
3023 if (fd[i].events & POLLOUT)
3024 FD_SET(fd[i].fd, &wfds);
3026 if (fd[i].fd > maxfd)
3030 if (maxfd >= FD_SETSIZE) {
3031 Punt("Ran out of fd_set slots; "
3032 "recompile with a larger FD_SETSIZE.");
3038 usecs = timeout * 1000;
3039 tv.tv_sec = usecs / 1000000;
3040 tv.tv_usec = usecs % 1000000;
3044 nselect = select(maxfd + 1, &rfds, &wfds, 0, tvp);
3050 for (i = 0; i < nfd; i++) {
3051 if (FD_ISSET(fd[i].fd, &rfds))
3052 fd[i].revents |= POLLIN;
3054 if (FD_ISSET(fd[i].fd, &wfds))
3055 fd[i].revents |= POLLOUT;
3063 #endif /* USE_SELECT */