1 /* $NetBSD: job.c,v 1.165 2013/01/26 15:52:59 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 1.165 2013/01/26 15:52:59 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 1.165 2013/01/26 15:52:59 christos Exp $");
87 * handle the creation etc. of our child processes.
90 * Job_Make Start the creation of the given target.
92 * Job_CatchChildren Check for and handle the termination of any
93 * children. This must be called reasonably
94 * frequently to keep the whole make going at
95 * a decent clip, since job table entries aren't
96 * removed until their process is caught this way.
98 * Job_CatchOutput Print any output our children have produced.
99 * Should also be called fairly frequently to
100 * keep the user informed of what's going on.
101 * If no output is waiting, it will block for
102 * a time given by the SEL_* constants, below,
103 * or until output is ready.
105 * Job_Init Called to intialize this module. in addition,
106 * any commands attached to the .BEGIN target
107 * are executed before this function returns.
108 * Hence, the makefile must have been parsed
109 * before this function is called.
111 * Job_End Cleanup any memory used.
113 * Job_ParseShell Given the line following a .SHELL target, parse
114 * the line as a shell specification. Returns
115 * FAILURE if the spec was incorrect.
117 * Job_Finish Perform any final processing which needs doing.
118 * This includes the execution of any commands
119 * which have been/were attached to the .END
120 * target. It should only be called when the
121 * job table is empty.
123 * Job_AbortAll Abort all currently running jobs. It doesn't
124 * handle output or do anything for the jobs,
125 * just kills them. It should only be called in
126 * an emergency, as it were.
128 * Job_CheckCommands Verify that the commands for a target are
129 * ok. Provide them if necessary and possible.
131 * Job_Touch Update a target without really updating it.
133 * Job_Wait Wait for all currently-running jobs to finish.
139 #include <sys/types.h>
140 #include <sys/stat.h>
141 #include <sys/file.h>
142 #include <sys/time.h>
147 #if !defined(USE_SELECT) && defined(HAVE_POLL_H)
150 #ifndef USE_SELECT /* no poll.h */
153 #if defined(HAVE_SYS_SELECT_H)
154 # include <sys/select.h>
161 #if defined(HAVE_SYS_SOCKET_H)
162 # include <sys/socket.h>
169 #include "pathnames.h"
171 # define STATIC static
174 * error handling variables
176 static int errors = 0; /* number of errors reported */
177 static int aborting = 0; /* why is the make aborting? */
178 #define ABORT_ERROR 1 /* Because of an error */
179 #define ABORT_INTERRUPT 2 /* Because it was interrupted */
180 #define ABORT_WAIT 3 /* Waiting for jobs to finish */
181 #define JOB_TOKENS "+EI+" /* Token to requeue for each abort state */
184 * this tracks the number of tokens currently "out" to build jobs.
186 int jobTokensRunning = 0;
187 int not_parallel = 0; /* set if .NOT_PARALLEL */
190 * XXX: Avoid SunOS bug... FILENO() is fp->_file, and file
191 * is a char! So when we go above 127 we turn negative!
193 #define FILENO(a) ((unsigned) fileno(a))
196 * post-make command processing. The node postCommands is really just the
197 * .END target but we keep it around to avoid having to search for it
200 static GNode *postCommands = NULL;
201 /* node containing commands to execute when
202 * everything else is done */
203 static int numCommands; /* The number of commands actually printed
204 * for a target. Should this number be
205 * 0, no shell will be executed. */
208 * Return values from JobStart.
210 #define JOB_RUNNING 0 /* Job is running */
211 #define JOB_ERROR 1 /* Error in starting the job */
212 #define JOB_FINISHED 2 /* The job is already finished */
215 * Descriptions for various shells.
217 * The build environment may set DEFSHELL_INDEX to one of
218 * DEFSHELL_INDEX_SH, DEFSHELL_INDEX_KSH, or DEFSHELL_INDEX_CSH, to
219 * select one of the prefedined shells as the default shell.
221 * Alternatively, the build environment may set DEFSHELL_CUSTOM to the
222 * name or the full path of a sh-compatible shell, which will be used as
225 * ".SHELL" lines in Makefiles can choose the default shell from the
226 # set defined here, or add additional shells.
229 #ifdef DEFSHELL_CUSTOM
230 #define DEFSHELL_INDEX_CUSTOM 0
231 #define DEFSHELL_INDEX_SH 1
232 #define DEFSHELL_INDEX_KSH 2
233 #define DEFSHELL_INDEX_CSH 3
234 #else /* !DEFSHELL_CUSTOM */
235 #define DEFSHELL_INDEX_SH 0
236 #define DEFSHELL_INDEX_KSH 1
237 #define DEFSHELL_INDEX_CSH 2
238 #endif /* !DEFSHELL_CUSTOM */
240 #ifndef DEFSHELL_INDEX
241 #define DEFSHELL_INDEX 0 /* DEFSHELL_INDEX_CUSTOM or DEFSHELL_INDEX_SH */
242 #endif /* !DEFSHELL_INDEX */
244 static Shell shells[] = {
245 #ifdef DEFSHELL_CUSTOM
247 * An sh-compatible shell with a non-standard name.
249 * Keep this in sync with the "sh" description below, but avoid
250 * non-portable features that might not be supplied by all
251 * sh-compatible shells.
255 FALSE, "", "", "", 0,
256 FALSE, "echo \"%s\"\n", "%s\n", "{ %s \n} || exit $?\n", "'\n'", '#',
260 #endif /* DEFSHELL_CUSTOM */
262 * SH description. Echo control is also possible and, under
263 * sun UNIX anyway, one can even control error checking.
267 FALSE, "", "", "", 0,
268 FALSE, "echo \"%s\"\n", "%s\n", "{ %s \n} || exit $?\n", "'\n'", '#',
269 #if defined(MAKE_NATIVE) && defined(__NetBSD__)
281 TRUE, "set +v", "set -v", "set +v", 6,
282 FALSE, "echo \"%s\"\n", "%s\n", "{ %s \n} || exit $?\n", "'\n'", '#',
287 * CSH description. The csh can do echo control by playing
288 * with the setting of the 'echo' shell variable. Sadly,
289 * however, it is unable to do error control nicely.
293 TRUE, "unset verbose", "set verbose", "unset verbose", 10,
294 FALSE, "echo \"%s\"\n", "csh -c \"%s || exit 0\"\n", "", "'\\\n'", '#',
302 FALSE, NULL, NULL, NULL, 0,
303 FALSE, NULL, NULL, NULL, NULL, 0,
307 static Shell *commandShell = &shells[DEFSHELL_INDEX]; /* this is the shell to
309 * commands in the Makefile.
311 * Job_ParseShell function */
312 const char *shellPath = NULL, /* full pathname of
313 * executable image */
314 *shellName = NULL; /* last component of shell */
315 static const char *shellArgv = NULL; /* Custom shell args */
318 STATIC Job *job_table; /* The structures that describe them */
319 STATIC Job *job_table_end; /* job_table + maxJobs */
320 static int wantToken; /* we want a token */
321 static int lurking_children = 0;
322 static int make_suspended = 0; /* non-zero if we've seen a SIGTSTP (etc) */
325 * Set of descriptors of pipes connected to
326 * the output channels of children
328 static struct pollfd *fds = NULL;
329 static Job **jobfds = NULL;
331 static void watchfd(Job *);
332 static void clearfd(Job *);
333 static int readyfd(Job *);
335 STATIC GNode *lastNode; /* The node for which output was most recently
337 static char *targPrefix = NULL; /* What we print at the start of TARG_FMT */
338 static Job tokenWaitJob; /* token wait pseudo-job */
340 static Job childExitJob; /* child exit pseudo-job */
341 #define CHILD_EXIT "."
342 #define DO_JOB_RESUME "R"
344 #define TARG_FMT "%s %s ---\n" /* Default format */
345 #define MESSAGE(fp, gn) \
347 (void)fprintf(fp, TARG_FMT, targPrefix, gn->name)
349 static sigset_t caught_signals; /* Set of signals we handle */
351 #define KILLPG(pid, sig) kill(-(pid), (sig))
353 #define KILLPG(pid, sig) killpg((pid), (sig))
356 static void JobChildSig(int);
357 static void JobContinueSig(int);
358 static Job *JobFindPid(int, int, Boolean);
359 static int JobPrintCommand(void *, void *);
360 static int JobSaveCommand(void *, void *);
361 static void JobClose(Job *);
362 static void JobExec(Job *, char **);
363 static void JobMakeArgv(Job *, char **);
364 static int JobStart(GNode *, int);
365 static char *JobOutput(Job *, char *, char *, int);
366 static void JobDoOutput(Job *, Boolean);
367 static Shell *JobMatchShell(const char *);
368 static void JobInterrupt(int, int) MAKE_ATTR_DEAD;
369 static void JobRestartJobs(void);
370 static void JobTokenAdd(void);
371 static void JobSigLock(sigset_t *);
372 static void JobSigUnlock(sigset_t *);
373 static void JobSigReset(void);
375 const char *malloc_options="A";
378 job_table_dump(const char *where)
382 fprintf(debug_file, "job table @ %s\n", where);
383 for (job = job_table; job < job_table_end; job++) {
384 fprintf(debug_file, "job %d, status %d, flags %d, pid %d\n",
385 (int)(job - job_table), job->job_state, job->flags, job->pid);
390 * JobSigLock/JobSigUnlock
392 * Signal lock routines to get exclusive access. Currently used to
393 * protect `jobs' and `stoppedJobs' list manipulations.
395 static void JobSigLock(sigset_t *omaskp)
397 if (sigprocmask(SIG_BLOCK, &caught_signals, omaskp) != 0) {
398 Punt("JobSigLock: sigprocmask: %s", strerror(errno));
403 static void JobSigUnlock(sigset_t *omaskp)
405 (void)sigprocmask(SIG_SETMASK, omaskp, NULL);
409 JobCreatePipe(Job *job, int minfd)
413 if (pipe(job->jobPipe) == -1)
414 Punt("Cannot create pipe: %s", strerror(errno));
416 /* Set close-on-exec flag for both */
417 (void)fcntl(job->jobPipe[0], F_SETFD, 1);
418 (void)fcntl(job->jobPipe[1], F_SETFD, 1);
421 * We mark the input side of the pipe non-blocking; we poll(2) the
422 * pipe when we're waiting for a job token, but we might lose the
423 * race for the token when a new one becomes available, so the read
424 * from the pipe should not block.
426 fcntl(job->jobPipe[0], F_SETFL,
427 fcntl(job->jobPipe[0], F_GETFL, 0) | O_NONBLOCK);
429 for (i = 0; i < 2; i++) {
430 /* Avoid using low numbered fds */
431 fd = fcntl(job->jobPipe[i], F_DUPFD, minfd);
433 close(job->jobPipe[i]);
434 job->jobPipe[i] = fd;
440 *-----------------------------------------------------------------------
442 * Pass a signal to a job
445 * signop Signal to send it
448 * None, except the job may bite it.
450 *-----------------------------------------------------------------------
453 JobCondPassSig(int signo)
458 (void)fprintf(debug_file, "JobCondPassSig(%d) called.\n", signo);
461 for (job = job_table; job < job_table_end; job++) {
462 if (job->job_state != JOB_ST_RUNNING)
465 (void)fprintf(debug_file,
466 "JobCondPassSig passing signal %d to child %d.\n",
469 KILLPG(job->pid, signo);
474 *-----------------------------------------------------------------------
479 * signo The signal number we've received
485 * Sends a token on the child exit pipe to wake us up from
488 *-----------------------------------------------------------------------
491 JobChildSig(int signo MAKE_ATTR_UNUSED)
493 while (write(childExitJob.outPipe, CHILD_EXIT, 1) == -1 && errno == EAGAIN)
499 *-----------------------------------------------------------------------
501 * Resume all stopped jobs.
504 * signo The signal number we've received
510 * Jobs start running again.
512 *-----------------------------------------------------------------------
515 JobContinueSig(int signo MAKE_ATTR_UNUSED)
518 * Defer sending to SIGCONT to our stopped children until we return
519 * from the signal handler.
521 while (write(childExitJob.outPipe, DO_JOB_RESUME, 1) == -1 &&
527 *-----------------------------------------------------------------------
529 * Pass a signal on to all jobs, then resend to ourselves.
532 * signo The signal number we've received
538 * We die by the same signal.
540 *-----------------------------------------------------------------------
542 MAKE_ATTR_DEAD static void
543 JobPassSig_int(int signo)
545 /* Run .INTERRUPT target then exit */
546 JobInterrupt(TRUE, signo);
549 MAKE_ATTR_DEAD static void
550 JobPassSig_term(int signo)
552 /* Dont run .INTERRUPT target then exit */
553 JobInterrupt(FALSE, signo);
557 JobPassSig_suspend(int signo)
559 sigset_t nmask, omask;
560 struct sigaction act;
562 /* Suppress job started/continued messages */
565 /* Pass the signal onto every job */
566 JobCondPassSig(signo);
569 * Send ourselves the signal now we've given the message to everyone else.
570 * Note we block everything else possible while we're getting the signal.
571 * This ensures that all our jobs get continued when we wake up before
572 * we take any other signal.
575 sigdelset(&nmask, signo);
576 (void)sigprocmask(SIG_SETMASK, &nmask, &omask);
578 act.sa_handler = SIG_DFL;
579 sigemptyset(&act.sa_mask);
581 (void)sigaction(signo, &act, NULL);
584 (void)fprintf(debug_file,
585 "JobPassSig passing signal %d to self.\n", signo);
588 (void)kill(getpid(), signo);
591 * We've been continued.
593 * A whole host of signals continue to happen!
594 * SIGCHLD for any processes that actually suspended themselves.
595 * SIGCHLD for any processes that exited while we were alseep.
596 * The SIGCONT that actually caused us to wakeup.
598 * Since we defer passing the SIGCONT on to our children until
599 * the main processing loop, we can be sure that all the SIGCHLD
600 * events will have happened by then - and that the waitpid() will
601 * collect the child 'suspended' events.
602 * For correct sequencing we just need to ensure we process the
603 * waitpid() before passign on the SIGCONT.
605 * In any case nothing else is needed here.
608 /* Restore handler and signal mask */
609 act.sa_handler = JobPassSig_suspend;
610 (void)sigaction(signo, &act, NULL);
611 (void)sigprocmask(SIG_SETMASK, &omask, NULL);
615 *-----------------------------------------------------------------------
617 * Compare the pid of the job with the given pid and return 0 if they
618 * are equal. This function is called from Job_CatchChildren
619 * to find the job descriptor of the finished job.
623 * pid process id desired
626 * Job with matching pid
630 *-----------------------------------------------------------------------
633 JobFindPid(int pid, int status, Boolean isJobs)
637 for (job = job_table; job < job_table_end; job++) {
638 if ((job->job_state == status) && job->pid == pid)
641 if (DEBUG(JOB) && isJobs)
642 job_table_dump("no pid");
647 *-----------------------------------------------------------------------
649 * Put out another command for the given job. If the command starts
650 * with an @ or a - we process it specially. In the former case,
651 * so long as the -s and -n flags weren't given to make, we stick
652 * a shell-specific echoOff command in the script. In the latter,
653 * we ignore errors for the entire job, unless the shell has error
655 * If the command is just "..." we take all future commands for this
656 * job to be commands to be executed once the entire graph has been
657 * made and return non-zero to signal that the end of the commands
658 * was reached. These commands are later attached to the postCommands
659 * node and executed by Job_End when all things are done.
660 * This function is called from JobStart via Lst_ForEach.
663 * cmdp command string to print
664 * jobp job for which to print it
667 * Always 0, unless the command was "..."
670 * If the command begins with a '-' and the shell has no error control,
671 * the JOB_IGNERR flag is set in the job descriptor.
672 * If the command is "..." and we're not ignoring such things,
673 * tailCmds is set to the successor node of the cmd.
674 * numCommands is incremented if the command is actually printed.
675 *-----------------------------------------------------------------------
678 JobPrintCommand(void *cmdp, void *jobp)
680 Boolean noSpecials; /* true if we shouldn't worry about
681 * inserting special commands into
682 * the input stream. */
683 Boolean shutUp = FALSE; /* true if we put a no echo command
684 * into the command file */
685 Boolean errOff = FALSE; /* true if we turned error checking
686 * off before printing the command
687 * and need to turn it back on */
688 const char *cmdTemplate; /* Template to use when printing the
690 char *cmdStart; /* Start of expanded command */
691 char *escCmd = NULL; /* Command with quotes/backticks escaped */
692 char *cmd = (char *)cmdp;
693 Job *job = (Job *)jobp;
696 noSpecials = NoExecute(job->node);
698 if (strcmp(cmd, "...") == 0) {
699 job->node->type |= OP_SAVE_CMDS;
700 if ((job->flags & JOB_IGNDOTS) == 0) {
701 job->tailCmds = Lst_Succ(Lst_Member(job->node->commands,
708 #define DBPRINTF(fmt, arg) if (DEBUG(JOB)) { \
709 (void)fprintf(debug_file, fmt, arg); \
711 (void)fprintf(job->cmdFILE, fmt, arg); \
712 (void)fflush(job->cmdFILE);
716 cmdStart = cmd = Var_Subst(NULL, cmd, job->node, FALSE);
718 cmdTemplate = "%s\n";
721 * Check for leading @' and -'s to control echoing and error checking.
723 while (*cmd == '@' || *cmd == '-' || (*cmd == '+')) {
726 shutUp = DEBUG(LOUD) ? FALSE : TRUE;
729 job->flags |= JOB_IGNERR;
735 * We're not actually executing anything...
736 * but this one needs to be - use compat mode just for it.
738 CompatRunCommand(cmdp, job->node);
746 while (isspace((unsigned char) *cmd))
750 * If the shell doesn't have error control the alternate echo'ing will
751 * be done (to avoid showing additional error checking code)
752 * and this will need the characters '$ ` \ "' escaped
755 if (!commandShell->hasErrCtl) {
756 /* Worst that could happen is every char needs escaping. */
757 escCmd = bmake_malloc((strlen(cmd) * 2) + 1);
758 for (i = 0, j= 0; cmd[i] != '\0'; i++, j++) {
759 if (cmd[i] == '$' || cmd[i] == '`' || cmd[i] == '\\' ||
768 if (!(job->flags & JOB_SILENT) && !noSpecials &&
769 commandShell->hasEchoCtl) {
770 DBPRINTF("%s\n", commandShell->echoOff);
772 if (commandShell->hasErrCtl)
779 if (commandShell->hasErrCtl) {
781 * we don't want the error-control commands showing
782 * up either, so we turn off echoing while executing
783 * them. We could put another field in the shell
784 * structure to tell JobDoOutput to look for this
785 * string too, but why make it any more complex than
788 if (!(job->flags & JOB_SILENT) && !shutUp &&
789 commandShell->hasEchoCtl) {
790 DBPRINTF("%s\n", commandShell->echoOff);
791 DBPRINTF("%s\n", commandShell->ignErr);
792 DBPRINTF("%s\n", commandShell->echoOn);
794 DBPRINTF("%s\n", commandShell->ignErr);
796 } else if (commandShell->ignErr &&
797 (*commandShell->ignErr != '\0'))
800 * The shell has no error control, so we need to be
801 * weird to get it to ignore any errors from the command.
802 * If echoing is turned on, we turn it off and use the
803 * errCheck template to echo the command. Leave echoing
804 * off so the user doesn't see the weirdness we go through
805 * to ignore errors. Set cmdTemplate to use the weirdness
806 * instead of the simple "%s\n" template.
808 if (!(job->flags & JOB_SILENT) && !shutUp) {
809 if (commandShell->hasEchoCtl) {
810 DBPRINTF("%s\n", commandShell->echoOff);
812 DBPRINTF(commandShell->errCheck, escCmd);
816 DBPRINTF(commandShell->errCheck, escCmd);
819 cmdTemplate = commandShell->ignErr;
821 * The error ignoration (hee hee) is already taken care
822 * of by the ignErr template, so pretend error checking
835 * If errors are being checked and the shell doesn't have error control
836 * but does supply an errOut template, then setup commands to run
840 if (!commandShell->hasErrCtl && commandShell->errOut &&
841 (*commandShell->errOut != '\0')) {
842 if (!(job->flags & JOB_SILENT) && !shutUp) {
843 if (commandShell->hasEchoCtl) {
844 DBPRINTF("%s\n", commandShell->echoOff);
846 DBPRINTF(commandShell->errCheck, escCmd);
849 /* If it's a comment line or blank, treat as an ignored error */
850 if ((escCmd[0] == commandShell->commentChar) ||
852 cmdTemplate = commandShell->ignErr;
854 cmdTemplate = commandShell->errOut;
859 if (DEBUG(SHELL) && strcmp(shellName, "sh") == 0 &&
860 (job->flags & JOB_TRACED) == 0) {
861 DBPRINTF("set -%s\n", "x");
862 job->flags |= JOB_TRACED;
865 DBPRINTF(cmdTemplate, cmd);
871 * If echoing is already off, there's no point in issuing the
872 * echoOff command. Otherwise we issue it and pretend it was on
873 * for the whole command...
875 if (!shutUp && !(job->flags & JOB_SILENT) && commandShell->hasEchoCtl){
876 DBPRINTF("%s\n", commandShell->echoOff);
879 DBPRINTF("%s\n", commandShell->errCheck);
881 if (shutUp && commandShell->hasEchoCtl) {
882 DBPRINTF("%s\n", commandShell->echoOn);
888 *-----------------------------------------------------------------------
890 * Save a command to be executed when everything else is done.
891 * Callback function for JobFinish...
897 * The command is tacked onto the end of postCommands's commands list.
899 *-----------------------------------------------------------------------
902 JobSaveCommand(void *cmd, void *gn)
904 cmd = Var_Subst(NULL, (char *)cmd, (GNode *)gn, FALSE);
905 (void)Lst_AtEnd(postCommands->commands, cmd);
911 *-----------------------------------------------------------------------
913 * Called to close both input and output pipes when a job is finished.
919 * The file descriptors associated with the job are closed.
921 *-----------------------------------------------------------------------
927 (void)close(job->outPipe);
930 JobDoOutput(job, TRUE);
931 (void)close(job->inPipe);
936 *-----------------------------------------------------------------------
938 * Do final processing for the given job including updating
939 * parents and starting new jobs as available/necessary. Note
940 * that we pay no attention to the JOB_IGNERR flag here.
941 * This is because when we're called because of a noexecute flag
942 * or something, jstat.w_status is 0 and when called from
943 * Job_CatchChildren, the status is zeroed if it s/b ignored.
947 * status sub-why job went away
953 * Final commands for the job are placed on postCommands.
955 * If we got an error and are aborting (aborting == ABORT_ERROR) and
956 * the job list is now empty, we are done for the day.
957 * If we recognized an error (errors !=0), we set the aborting flag
958 * to ABORT_ERROR so no more jobs will be started.
959 *-----------------------------------------------------------------------
963 JobFinish (Job *job, WAIT_T status)
965 Boolean done, return_job_token;
968 fprintf(debug_file, "Jobfinish: %d [%s], status %d\n",
969 job->pid, job->node->name, status);
972 if ((WIFEXITED(status) &&
973 (((WEXITSTATUS(status) != 0) && !(job->flags & JOB_IGNERR)))) ||
977 * If it exited non-zero and either we're doing things our
978 * way or we're not ignoring errors, the job is finished.
979 * Similarly, if the shell died because of a signal
980 * the job is also finished. In these
981 * cases, finish out the job's output before printing the exit
985 if (job->cmdFILE != NULL && job->cmdFILE != stdout) {
986 (void)fclose(job->cmdFILE);
990 } else if (WIFEXITED(status)) {
992 * Deal with ignored errors in -B mode. We need to print a message
993 * telling of the ignored error as well as setting status.w_status
994 * to 0 so the next command gets run. To do this, we set done to be
995 * TRUE if in -B mode and the job exited non-zero.
997 done = WEXITSTATUS(status) != 0;
999 * Old comment said: "Note we don't
1000 * want to close down any of the streams until we know we're at the
1002 * But we do. Otherwise when are we going to print the rest of the
1008 * No need to close things down or anything.
1014 if (WIFEXITED(status)) {
1016 (void)fprintf(debug_file, "Process %d [%s] exited.\n",
1017 job->pid, job->node->name);
1019 if (WEXITSTATUS(status) != 0) {
1020 if (job->node != lastNode) {
1021 MESSAGE(stdout, job->node);
1022 lastNode = job->node;
1026 meta_job_error(job, job->node, job->flags, WEXITSTATUS(status));
1029 (void)printf("*** [%s] Error code %d%s\n",
1031 WEXITSTATUS(status),
1032 (job->flags & JOB_IGNERR) ? " (ignored)" : "");
1033 if (job->flags & JOB_IGNERR) {
1034 WAIT_STATUS(status) = 0;
1036 PrintOnError(job->node, NULL);
1038 } else if (DEBUG(JOB)) {
1039 if (job->node != lastNode) {
1040 MESSAGE(stdout, job->node);
1041 lastNode = job->node;
1043 (void)printf("*** [%s] Completed successfully\n",
1047 if (job->node != lastNode) {
1048 MESSAGE(stdout, job->node);
1049 lastNode = job->node;
1051 (void)printf("*** [%s] Signal %d\n",
1052 job->node->name, WTERMSIG(status));
1054 (void)fflush(stdout);
1059 meta_job_finish(job);
1063 return_job_token = FALSE;
1065 Trace_Log(JOBEND, job);
1066 if (!(job->flags & JOB_SPECIAL)) {
1067 if ((WAIT_STATUS(status) != 0) ||
1068 (aborting == ABORT_ERROR) ||
1069 (aborting == ABORT_INTERRUPT))
1070 return_job_token = TRUE;
1073 if ((aborting != ABORT_ERROR) && (aborting != ABORT_INTERRUPT) &&
1074 (WAIT_STATUS(status) == 0)) {
1076 * As long as we aren't aborting and the job didn't return a non-zero
1077 * status that we shouldn't ignore, we call Make_Update to update
1078 * the parents. In addition, any saved commands for the node are placed
1079 * on the .END target.
1081 if (job->tailCmds != NULL) {
1082 Lst_ForEachFrom(job->node->commands, job->tailCmds,
1086 job->node->made = MADE;
1087 if (!(job->flags & JOB_SPECIAL))
1088 return_job_token = TRUE;
1089 Make_Update(job->node);
1090 job->job_state = JOB_ST_FREE;
1091 } else if (WAIT_STATUS(status)) {
1093 job->job_state = JOB_ST_FREE;
1097 * Set aborting if any error.
1099 if (errors && !keepgoing && (aborting != ABORT_INTERRUPT)) {
1101 * If we found any errors in this batch of children and the -k flag
1102 * wasn't given, we set the aborting flag so no more jobs get
1105 aborting = ABORT_ERROR;
1108 if (return_job_token)
1111 if (aborting == ABORT_ERROR && jobTokensRunning == 0) {
1113 * If we are aborting and the job table is now empty, we finish.
1120 *-----------------------------------------------------------------------
1122 * Touch the given target. Called by JobStart when the -t flag was
1126 * gn the node of the file to touch
1127 * silent TRUE if should not print message
1133 * The data modification of the file is changed. In addition, if the
1134 * file did not exist, it is created.
1135 *-----------------------------------------------------------------------
1138 Job_Touch(GNode *gn, Boolean silent)
1140 int streamID; /* ID of stream opened to do the touch */
1141 struct utimbuf times; /* Times for utime() call */
1143 if (gn->type & (OP_JOIN|OP_USE|OP_USEBEFORE|OP_EXEC|OP_OPTIONAL|
1144 OP_SPECIAL|OP_PHONY)) {
1146 * .JOIN, .USE, .ZEROTIME and .OPTIONAL targets are "virtual" targets
1147 * and, as such, shouldn't really be created.
1152 if (!silent || NoExecute(gn)) {
1153 (void)fprintf(stdout, "touch %s\n", gn->name);
1154 (void)fflush(stdout);
1157 if (NoExecute(gn)) {
1161 if (gn->type & OP_ARCHV) {
1163 } else if (gn->type & OP_LIB) {
1166 char *file = gn->path ? gn->path : gn->name;
1168 times.actime = times.modtime = now;
1169 if (utime(file, ×) < 0){
1170 streamID = open(file, O_RDWR | O_CREAT, 0666);
1172 if (streamID >= 0) {
1176 * Read and write a byte to the file to change the
1177 * modification time, then close the file.
1179 if (read(streamID, &c, 1) == 1) {
1180 (void)lseek(streamID, (off_t)0, SEEK_SET);
1181 while (write(streamID, &c, 1) == -1 && errno == EAGAIN)
1185 (void)close(streamID);
1187 (void)fprintf(stdout, "*** couldn't touch %s: %s",
1188 file, strerror(errno));
1189 (void)fflush(stdout);
1196 *-----------------------------------------------------------------------
1197 * Job_CheckCommands --
1198 * Make sure the given node has all the commands it needs.
1201 * gn The target whose commands need verifying
1202 * abortProc Function to abort with message
1205 * TRUE if the commands list is/was ok.
1208 * The node will have commands from the .DEFAULT rule added to it
1210 *-----------------------------------------------------------------------
1213 Job_CheckCommands(GNode *gn, void (*abortProc)(const char *, ...))
1215 if (OP_NOP(gn->type) && Lst_IsEmpty(gn->commands) &&
1216 ((gn->type & OP_LIB) == 0 || Lst_IsEmpty(gn->children))) {
1218 * No commands. Look for .DEFAULT rule from which we might infer
1221 if ((DEFAULT != NULL) && !Lst_IsEmpty(DEFAULT->commands) &&
1222 (gn->type & OP_SPECIAL) == 0) {
1225 * Make only looks for a .DEFAULT if the node was never the
1226 * target of an operator, so that's what we do too. If
1227 * a .DEFAULT was given, we substitute its commands for gn's
1228 * commands and set the IMPSRC variable to be the target's name
1229 * The DEFAULT node acts like a transformation rule, in that
1230 * gn also inherits any attributes or sources attached to
1233 Make_HandleUse(DEFAULT, gn);
1234 Var_Set(IMPSRC, Var_Value(TARGET, gn, &p1), gn, 0);
1237 } else if (Dir_MTime(gn, 0) == 0 && (gn->type & OP_SPECIAL) == 0) {
1239 * The node wasn't the target of an operator we have no .DEFAULT
1240 * rule to go on and the target doesn't already exist. There's
1241 * nothing more we can do for this branch. If the -k flag wasn't
1242 * given, we stop in our tracks, otherwise we just don't update
1243 * this node's parents so they never get examined.
1245 static const char msg[] = ": don't know how to make";
1247 if (gn->flags & FROM_DEPEND) {
1248 fprintf(stdout, "%s: ignoring stale %s for %s\n",
1249 progname, makeDependfile, gn->name);
1253 if (gn->type & OP_OPTIONAL) {
1254 (void)fprintf(stdout, "%s%s %s (ignored)\n", progname,
1256 (void)fflush(stdout);
1257 } else if (keepgoing) {
1258 (void)fprintf(stdout, "%s%s %s (continuing)\n", progname,
1260 (void)fflush(stdout);
1263 (*abortProc)("%s%s %s. Stop", progname, msg, gn->name);
1272 *-----------------------------------------------------------------------
1274 * Execute the shell for the given job. Called from JobStart
1277 * job Job to execute
1283 * A shell is executed, outputs is altered and the Job structure added
1286 *-----------------------------------------------------------------------
1289 JobExec(Job *job, char **argv)
1291 int cpid; /* ID of new child */
1294 job->flags &= ~JOB_TRACED;
1299 (void)fprintf(debug_file, "Running %s %sly\n", job->node->name, "local");
1300 (void)fprintf(debug_file, "\tCommand: ");
1301 for (i = 0; argv[i] != NULL; i++) {
1302 (void)fprintf(debug_file, "%s ", argv[i]);
1304 (void)fprintf(debug_file, "\n");
1308 * Some jobs produce no output and it's disconcerting to have
1309 * no feedback of their running (since they produce no output, the
1310 * banner with their name in it never appears). This is an attempt to
1311 * provide that feedback, even if nothing follows it.
1313 if ((lastNode != job->node) && !(job->flags & JOB_SILENT)) {
1314 MESSAGE(stdout, job->node);
1315 lastNode = job->node;
1318 /* No interruptions until this job is on the `jobs' list */
1321 /* Pre-emptively mark job running, pid still zero though */
1322 job->job_state = JOB_ST_RUNNING;
1326 Punt("Cannot vfork: %s", strerror(errno));
1334 meta_job_child(job);
1338 * Reset all signal handlers; this is necessary because we also
1339 * need to unblock signals before we exec(2).
1343 /* Now unblock signals */
1344 sigemptyset(&tmask);
1345 JobSigUnlock(&tmask);
1348 * Must duplicate the input stream down to the child's input and
1349 * reset it to the beginning (again). Since the stream was marked
1350 * close-on-exec, we must clear that bit in the new input.
1352 if (dup2(FILENO(job->cmdFILE), 0) == -1) {
1353 execError("dup2", "job->cmdFILE");
1356 (void)fcntl(0, F_SETFD, 0);
1357 (void)lseek(0, (off_t)0, SEEK_SET);
1359 if (job->node->type & OP_MAKE) {
1361 * Pass job token pipe to submakes.
1363 fcntl(tokenWaitJob.inPipe, F_SETFD, 0);
1364 fcntl(tokenWaitJob.outPipe, F_SETFD, 0);
1368 * Set up the child's output to be routed through the pipe
1369 * we've created for it.
1371 if (dup2(job->outPipe, 1) == -1) {
1372 execError("dup2", "job->outPipe");
1376 * The output channels are marked close on exec. This bit was
1377 * duplicated by the dup2(on some systems), so we have to clear
1378 * it before routing the shell's error output to the same place as
1379 * its standard output.
1381 (void)fcntl(1, F_SETFD, 0);
1382 if (dup2(1, 2) == -1) {
1383 execError("dup2", "1, 2");
1388 * We want to switch the child into a different process family so
1389 * we can kill it and all its descendants in one fell swoop,
1390 * by killing its process family, but not commit suicide.
1392 #if defined(HAVE_SETPGID)
1393 (void)setpgid(0, getpid());
1395 #if defined(HAVE_SETSID)
1396 /* XXX: dsl - I'm sure this should be setpgrp()... */
1399 (void)setpgrp(0, getpid());
1405 (void)execv(shellPath, argv);
1406 execError("exec", shellPath);
1410 /* Parent, continuing after the child exec */
1413 Trace_Log(JOBSTART, job);
1416 * Set the current position in the buffer to the beginning
1417 * and mark another stream to watch in the outputs mask
1423 if (job->cmdFILE != NULL && job->cmdFILE != stdout) {
1424 (void)fclose(job->cmdFILE);
1425 job->cmdFILE = NULL;
1429 * Now the job is actually running, add it to the table.
1432 fprintf(debug_file, "JobExec(%s): pid %d added to jobs table\n",
1433 job->node->name, job->pid);
1434 job_table_dump("job started");
1436 JobSigUnlock(&mask);
1440 *-----------------------------------------------------------------------
1442 * Create the argv needed to execute the shell for a given job.
1449 *-----------------------------------------------------------------------
1452 JobMakeArgv(Job *job, char **argv)
1455 static char args[10]; /* For merged arguments */
1457 argv[0] = UNCONST(shellName);
1460 if ((commandShell->exit && (*commandShell->exit != '-')) ||
1461 (commandShell->echo && (*commandShell->echo != '-')))
1464 * At least one of the flags doesn't have a minus before it, so
1465 * merge them together. Have to do this because the *(&(@*#*&#$#
1466 * Bourne shell thinks its second argument is a file to source.
1467 * Grrrr. Note the ten-character limitation on the combined arguments.
1469 (void)snprintf(args, sizeof(args), "-%s%s",
1470 ((job->flags & JOB_IGNERR) ? "" :
1471 (commandShell->exit ? commandShell->exit : "")),
1472 ((job->flags & JOB_SILENT) ? "" :
1473 (commandShell->echo ? commandShell->echo : "")));
1480 if (!(job->flags & JOB_IGNERR) && commandShell->exit) {
1481 argv[argc] = UNCONST(commandShell->exit);
1484 if (!(job->flags & JOB_SILENT) && commandShell->echo) {
1485 argv[argc] = UNCONST(commandShell->echo);
1493 *-----------------------------------------------------------------------
1495 * Start a target-creation process going for the target described
1496 * by the graph node gn.
1499 * gn target to create
1500 * flags flags for the job to override normal ones.
1501 * e.g. JOB_SPECIAL or JOB_IGNDOTS
1502 * previous The previous Job structure for this node, if any.
1505 * JOB_ERROR if there was an error in the commands, JOB_FINISHED
1506 * if there isn't actually anything left to do for the job and
1507 * JOB_RUNNING if the job has been started.
1510 * A new Job node is created and added to the list of running
1511 * jobs. PMake is forked and a child shell created.
1513 * NB: I'm fairly sure that this code is never called with JOB_SPECIAL set
1514 * JOB_IGNDOTS is never set (dsl)
1515 * Also the return value is ignored by everyone.
1516 *-----------------------------------------------------------------------
1519 JobStart(GNode *gn, int flags)
1521 Job *job; /* new job descriptor */
1522 char *argv[10]; /* Argument vector to shell */
1523 Boolean cmdsOK; /* true if the nodes commands were all right */
1524 Boolean noExec; /* Set true if we decide not to run the job */
1525 int tfd; /* File descriptor to the temp file */
1527 for (job = job_table; job < job_table_end; job++) {
1528 if (job->job_state == JOB_ST_FREE)
1531 if (job >= job_table_end)
1532 Punt("JobStart no job slots vacant");
1534 memset(job, 0, sizeof *job);
1535 job->job_state = JOB_ST_SETUP;
1536 if (gn->type & OP_SPECIAL)
1537 flags |= JOB_SPECIAL;
1540 job->tailCmds = NULL;
1543 * Set the initial value of the flags for this job based on the global
1544 * ones and the node's attributes... Any flags supplied by the caller
1545 * are also added to the field.
1548 if (Targ_Ignore(gn)) {
1549 job->flags |= JOB_IGNERR;
1551 if (Targ_Silent(gn)) {
1552 job->flags |= JOB_SILENT;
1554 job->flags |= flags;
1557 * Check the commands now so any attributes from .DEFAULT have a chance
1558 * to migrate to the node
1560 cmdsOK = Job_CheckCommands(gn, Error);
1562 job->inPollfd = NULL;
1564 * If the -n flag wasn't given, we open up OUR (not the child's)
1565 * temporary file to stuff commands in it. The thing is rd/wr so we don't
1566 * need to reopen it to feed it to the shell. If the -n flag *was* given,
1567 * we just set the file to be stdout. Cute, huh?
1569 if (((gn->type & OP_MAKE) && !(noRecursiveExecute)) ||
1570 (!noExecute && !touchFlag)) {
1572 * tfile is the name of a file into which all shell commands are
1573 * put. It is removed before the child shell is executed, unless
1574 * DEBUG(SCRIPT) is set.
1579 * We're serious here, but if the commands were bogus, we're
1583 PrintOnError(gn, NULL); /* provide some clue */
1588 tfd = mkTempFile(TMPPAT, &tfile);
1590 (void)eunlink(tfile);
1591 JobSigUnlock(&mask);
1593 job->cmdFILE = fdopen(tfd, "w+");
1594 if (job->cmdFILE == NULL) {
1595 Punt("Could not fdopen %s", tfile);
1597 (void)fcntl(FILENO(job->cmdFILE), F_SETFD, 1);
1599 * Send the commands to the command file, flush all its buffers then
1600 * rewind and remove the thing.
1606 meta_job_start(job, gn);
1607 if (Targ_Silent(gn)) { /* might have changed */
1608 job->flags |= JOB_SILENT;
1613 * We can do all the commands at once. hooray for sanity
1616 Lst_ForEach(gn->commands, JobPrintCommand, job);
1619 * If we didn't print out any commands to the shell script,
1620 * there's not much point in executing the shell, is there?
1622 if (numCommands == 0) {
1627 } else if (NoExecute(gn)) {
1629 * Not executing anything -- just print all the commands to stdout
1630 * in one fell swoop. This will still set up job->tailCmds correctly.
1632 if (lastNode != gn) {
1633 MESSAGE(stdout, gn);
1636 job->cmdFILE = stdout;
1638 * Only print the commands if they're ok, but don't die if they're
1639 * not -- just let the user know they're bad and keep going. It
1640 * doesn't do any harm in this case and may do some good.
1643 Lst_ForEach(gn->commands, JobPrintCommand, job);
1646 * Don't execute the shell, thank you.
1651 * Just touch the target and note that no shell should be executed.
1652 * Set cmdFILE to stdout to make life easier. Check the commands, too,
1653 * but don't die if they're no good -- it does no harm to keep working
1656 job->cmdFILE = stdout;
1657 Job_Touch(gn, job->flags&JOB_SILENT);
1660 /* Just in case it isn't already... */
1661 (void)fflush(job->cmdFILE);
1664 * If we're not supposed to execute a shell, don't.
1667 if (!(job->flags & JOB_SPECIAL))
1670 * Unlink and close the command file if we opened one
1672 if (job->cmdFILE != stdout) {
1673 if (job->cmdFILE != NULL) {
1674 (void)fclose(job->cmdFILE);
1675 job->cmdFILE = NULL;
1680 * We only want to work our way up the graph if we aren't here because
1681 * the commands for the job were no good.
1683 if (cmdsOK && aborting == 0) {
1684 if (job->tailCmds != NULL) {
1685 Lst_ForEachFrom(job->node->commands, job->tailCmds,
1689 job->node->made = MADE;
1690 Make_Update(job->node);
1692 job->job_state = JOB_ST_FREE;
1693 return cmdsOK ? JOB_FINISHED : JOB_ERROR;
1697 * Set up the control arguments to the shell. This is based on the flags
1698 * set earlier for this job.
1700 JobMakeArgv(job, argv);
1702 /* Create the pipe by which we'll get the shell's output. */
1703 JobCreatePipe(job, 3);
1706 return(JOB_RUNNING);
1710 JobOutput(Job *job, char *cp, char *endp, int msg)
1714 if (commandShell->noPrint) {
1715 ecp = Str_FindSubstring(cp, commandShell->noPrint);
1716 while (ecp != NULL) {
1719 if (!beSilent && msg && job->node != lastNode) {
1720 MESSAGE(stdout, job->node);
1721 lastNode = job->node;
1724 * The only way there wouldn't be a newline after
1725 * this line is if it were the last in the buffer.
1726 * however, since the non-printable comes after it,
1727 * there must be a newline, so we don't print one.
1729 (void)fprintf(stdout, "%s", cp);
1730 (void)fflush(stdout);
1732 cp = ecp + commandShell->noPLen;
1735 * Still more to print, look again after skipping
1736 * the whitespace following the non-printable
1740 while (*cp == ' ' || *cp == '\t' || *cp == '\n') {
1743 ecp = Str_FindSubstring(cp, commandShell->noPrint);
1753 *-----------------------------------------------------------------------
1755 * This function is called at different times depending on
1756 * whether the user has specified that output is to be collected
1757 * via pipes or temporary files. In the former case, we are called
1758 * whenever there is something to read on the pipe. We collect more
1759 * output from the given job and store it in the job's outBuf. If
1760 * this makes up a line, we print it tagged by the job's identifier,
1762 * If output has been collected in a temporary file, we open the
1763 * file and read it line by line, transfering it to our own
1764 * output channel until the file is empty. At which point we
1765 * remove the temporary file.
1766 * In both cases, however, we keep our figurative eye out for the
1767 * 'noPrint' line for the shell from which the output came. If
1768 * we recognize a line, we don't print it. If the command is not
1769 * alone on the line (the character after it is not \0 or \n), we
1770 * do print whatever follows it.
1773 * job the job whose output needs printing
1774 * finish TRUE if this is the last time we'll be called
1781 * curPos may be shifted as may the contents of outBuf.
1782 *-----------------------------------------------------------------------
1785 JobDoOutput(Job *job, Boolean finish)
1787 Boolean gotNL = FALSE; /* true if got a newline */
1788 Boolean fbuf; /* true if our buffer filled up */
1789 int nr; /* number of bytes read */
1790 int i; /* auxiliary index into outBuf */
1791 int max; /* limit for i (end of current data) */
1792 int nRead; /* (Temporary) number of bytes read */
1795 * Read as many bytes as will fit in the buffer.
1801 nRead = read(job->inPipe, &job->outBuf[job->curPos],
1802 JOB_BUFSIZE - job->curPos);
1804 if (errno == EAGAIN)
1807 perror("JobDoOutput(piperead)");
1815 * If we hit the end-of-file (the job is dead), we must flush its
1816 * remaining output, so pretend we read a newline if there's any
1817 * output remaining in the buffer.
1818 * Also clear the 'finish' flag so we stop looping.
1820 if ((nr == 0) && (job->curPos != 0)) {
1821 job->outBuf[job->curPos] = '\n';
1824 } else if (nr == 0) {
1829 * Look for the last newline in the bytes we just got. If there is
1830 * one, break out of the loop with 'i' as its index and gotNL set
1833 max = job->curPos + nr;
1834 for (i = job->curPos + nr - 1; i >= job->curPos; i--) {
1835 if (job->outBuf[i] == '\n') {
1838 } else if (job->outBuf[i] == '\0') {
1842 job->outBuf[i] = ' ';
1848 if (job->curPos == JOB_BUFSIZE) {
1850 * If we've run out of buffer space, we have no choice
1851 * but to print the stuff. sigh.
1857 if (gotNL || fbuf) {
1859 * Need to send the output to the screen. Null terminate it
1860 * first, overwriting the newline character if there was one.
1861 * So long as the line isn't one we should filter (according
1862 * to the shell description), we print the line, preceded
1863 * by a target banner if this target isn't the same as the
1864 * one for which we last printed something.
1865 * The rest of the data in the buffer are then shifted down
1866 * to the start of the buffer and curPos is set accordingly.
1868 job->outBuf[i] = '\0';
1869 if (i >= job->curPos) {
1872 cp = JobOutput(job, job->outBuf, &job->outBuf[i], FALSE);
1875 * There's still more in that thar buffer. This time, though,
1876 * we know there's no newline at the end, so we add one of
1877 * our own free will.
1880 if (!beSilent && job->node != lastNode) {
1881 MESSAGE(stdout, job->node);
1882 lastNode = job->node;
1886 meta_job_output(job, cp, gotNL ? "\n" : "");
1889 (void)fprintf(stdout, "%s%s", cp, gotNL ? "\n" : "");
1890 (void)fflush(stdout);
1894 /* shift the remaining characters down */
1895 (void)memcpy(job->outBuf, &job->outBuf[i + 1], max - (i + 1));
1896 job->curPos = max - (i + 1);
1900 * We have written everything out, so we just start over
1901 * from the start of the buffer. No copying. No nothing.
1908 * If the finish flag is true, we must loop until we hit
1909 * end-of-file on the pipe. This is guaranteed to happen
1910 * eventually since the other end of the pipe is now closed
1911 * (we closed it explicitly and the child has exited). When
1912 * we do get an EOF, finish will be set FALSE and we'll fall
1924 * Unfortunately it is too complicated to run .BEGIN, .END,
1925 * and .INTERRUPT job in the parallel job module. This has
1926 * the nice side effect that it avoids a lot of other problems.
1928 Lst lst = Lst_Init(FALSE);
1929 Lst_AtEnd(lst, targ);
1930 (void)Make_Run(lst);
1931 Lst_Destroy(lst, NULL);
1932 JobStart(targ, JOB_SPECIAL);
1933 while (jobTokensRunning) {
1937 Compat_Make(targ, targ);
1938 if (targ->made == ERROR) {
1939 PrintOnError(targ, "\n\nStop.");
1946 *-----------------------------------------------------------------------
1947 * Job_CatchChildren --
1948 * Handle the exit of a child. Called from Make_Make.
1951 * block TRUE if should block on the wait
1957 * The job descriptor is removed from the list of children.
1960 * We do waits, blocking or not, according to the wisdom of our
1961 * caller, until there are no more children to report. For each
1962 * job, call JobFinish to finish things off.
1964 *-----------------------------------------------------------------------
1968 Job_CatchChildren(void)
1970 int pid; /* pid of dead child */
1971 WAIT_T status; /* Exit/termination status */
1974 * Don't even bother if we know there's no one around.
1976 if (jobTokensRunning == 0)
1979 while ((pid = waitpid((pid_t) -1, &status, WNOHANG | WUNTRACED)) > 0) {
1981 (void)fprintf(debug_file, "Process %d exited/stopped status %x.\n", pid,
1982 WAIT_STATUS(status));
1984 JobReapChild(pid, status, TRUE);
1989 * It is possible that wait[pid]() was called from elsewhere,
1990 * this lets us reap jobs regardless.
1993 JobReapChild(pid_t pid, WAIT_T status, Boolean isJobs)
1995 Job *job; /* job descriptor for dead child */
1998 * Don't even bother if we know there's no one around.
2000 if (jobTokensRunning == 0)
2003 job = JobFindPid(pid, JOB_ST_RUNNING, isJobs);
2006 if (!lurking_children)
2007 Error("Child (%d) status %x not in table?", pid, status);
2009 return; /* not ours */
2011 if (WIFSTOPPED(status)) {
2013 (void)fprintf(debug_file, "Process %d (%s) stopped.\n",
2014 job->pid, job->node->name);
2016 if (!make_suspended) {
2017 switch (WSTOPSIG(status)) {
2019 (void)printf("*** [%s] Suspended\n", job->node->name);
2022 (void)printf("*** [%s] Stopped\n", job->node->name);
2025 (void)printf("*** [%s] Stopped -- signal %d\n",
2026 job->node->name, WSTOPSIG(status));
2028 job->job_suspended = 1;
2030 (void)fflush(stdout);
2034 job->job_state = JOB_ST_FINISHED;
2035 job->exit_status = WAIT_STATUS(status);
2037 JobFinish(job, status);
2041 *-----------------------------------------------------------------------
2042 * Job_CatchOutput --
2043 * Catch the output from our children, if we're using
2044 * pipes do so. Otherwise just block time until we get a
2045 * signal(most likely a SIGCHLD) since there's no point in
2046 * just spinning when there's nothing to do and the reaping
2047 * of a child can wait for a while.
2053 * Output is read from pipes if we're piping.
2054 * -----------------------------------------------------------------------
2057 Job_CatchOutput(void)
2063 (void)fflush(stdout);
2065 /* The first fd in the list is the job token pipe */
2066 nready = poll(fds + 1 - wantToken, nfds - 1 + wantToken, POLL_MSEC);
2068 if (nready < 0 || readyfd(&childExitJob)) {
2071 while (read(childExitJob.inPipe, &token, 1) == -1 && errno == EAGAIN)
2073 if (token == DO_JOB_RESUME[0])
2074 /* Complete relay requested from our SIGCONT handler */
2076 Job_CatchChildren();
2082 if (wantToken && readyfd(&tokenWaitJob))
2085 for (i = 2; i < nfds; i++) {
2086 if (!fds[i].revents)
2089 if (job->job_state != JOB_ST_RUNNING)
2091 JobDoOutput(job, FALSE);
2096 *-----------------------------------------------------------------------
2098 * Start the creation of a target. Basically a front-end for
2099 * JobStart used by the Make module.
2105 * Another job is started.
2107 *-----------------------------------------------------------------------
2112 (void)JobStart(gn, 0);
2118 if (shellPath == NULL) {
2120 * We are using the default shell, which may be an absolute
2121 * path if DEFSHELL_CUSTOM is defined.
2123 shellName = commandShell->name;
2124 #ifdef DEFSHELL_CUSTOM
2125 if (*shellName == '/') {
2126 shellPath = shellName;
2127 shellName = strrchr(shellPath, '/');
2131 shellPath = str_concat(_PATH_DEFSHELLDIR, shellName, STR_ADDSLASH);
2133 if (commandShell->exit == NULL) {
2134 commandShell->exit = "";
2136 if (commandShell->echo == NULL) {
2137 commandShell->echo = "";
2142 * Returns the string literal that is used in the current command shell
2143 * to produce a newline character.
2146 Shell_GetNewline(void)
2149 return commandShell->newline;
2158 } else if (!Var_Exists(MAKE_JOB_PREFIX, VAR_GLOBAL)) {
2159 Var_Set(MAKE_JOB_PREFIX, "---", VAR_GLOBAL, 0);
2162 targPrefix = Var_Subst(NULL, "${" MAKE_JOB_PREFIX "}", VAR_GLOBAL, 0);
2166 *-----------------------------------------------------------------------
2168 * Initialize the process module
2176 * lists and counters are initialized
2177 *-----------------------------------------------------------------------
2182 GNode *begin; /* node for commands to do at the very start */
2184 /* Allocate space for all the job info */
2185 job_table = bmake_malloc(maxJobs * sizeof *job_table);
2186 memset(job_table, 0, maxJobs * sizeof *job_table);
2187 job_table_end = job_table + maxJobs;
2196 * There is a non-zero chance that we already have children.
2197 * eg after 'make -f- <<EOF'
2198 * Since their termination causes a 'Child (pid) not in table' message,
2199 * Collect the status of any that are already dead, and suppress the
2200 * error message if there are any undead ones.
2204 rval = waitpid((pid_t) -1, &status, WNOHANG);
2208 lurking_children = 1;
2214 JobCreatePipe(&childExitJob, 3);
2216 /* We can only need to wait for tokens, children and output from each job */
2217 fds = bmake_malloc(sizeof (*fds) * (2 + maxJobs));
2218 jobfds = bmake_malloc(sizeof (*jobfds) * (2 + maxJobs));
2220 /* These are permanent entries and take slots 0 and 1 */
2221 watchfd(&tokenWaitJob);
2222 watchfd(&childExitJob);
2224 sigemptyset(&caught_signals);
2226 * Install a SIGCHLD handler.
2228 (void)bmake_signal(SIGCHLD, JobChildSig);
2229 sigaddset(&caught_signals, SIGCHLD);
2231 #define ADDSIG(s,h) \
2232 if (bmake_signal(s, SIG_IGN) != SIG_IGN) { \
2233 sigaddset(&caught_signals, s); \
2234 (void)bmake_signal(s, h); \
2238 * Catch the four signals that POSIX specifies if they aren't ignored.
2239 * JobPassSig will take care of calling JobInterrupt if appropriate.
2241 ADDSIG(SIGINT, JobPassSig_int)
2242 ADDSIG(SIGHUP, JobPassSig_term)
2243 ADDSIG(SIGTERM, JobPassSig_term)
2244 ADDSIG(SIGQUIT, JobPassSig_term)
2247 * There are additional signals that need to be caught and passed if
2248 * either the export system wants to be told directly of signals or if
2249 * we're giving each job its own process group (since then it won't get
2250 * signals from the terminal driver as we own the terminal)
2252 ADDSIG(SIGTSTP, JobPassSig_suspend)
2253 ADDSIG(SIGTTOU, JobPassSig_suspend)
2254 ADDSIG(SIGTTIN, JobPassSig_suspend)
2255 ADDSIG(SIGWINCH, JobCondPassSig)
2256 ADDSIG(SIGCONT, JobContinueSig)
2259 begin = Targ_FindNode(".BEGIN", TARG_NOCREATE);
2261 if (begin != NULL) {
2263 if (begin->made == ERROR) {
2264 PrintOnError(begin, "\n\nStop.");
2268 postCommands = Targ_FindNode(".END", TARG_CREATE);
2271 static void JobSigReset(void)
2274 if (sigismember(&caught_signals, s)) { \
2275 (void)bmake_signal(s, SIG_DFL); \
2288 (void)bmake_signal(SIGCHLD, SIG_DFL);
2292 *-----------------------------------------------------------------------
2294 * Find a shell in 'shells' given its name.
2297 * A pointer to the Shell structure.
2302 *-----------------------------------------------------------------------
2305 JobMatchShell(const char *name)
2309 for (sh = shells; sh->name != NULL; sh++) {
2310 if (strcmp(name, sh->name) == 0)
2317 *-----------------------------------------------------------------------
2319 * Parse a shell specification and set up commandShell, shellPath
2320 * and shellName appropriately.
2323 * line The shell spec
2326 * FAILURE if the specification was incorrect.
2329 * commandShell points to a Shell structure (either predefined or
2330 * created from the shell spec), shellPath is the full path of the
2331 * shell described by commandShell, while shellName is just the
2332 * final component of shellPath.
2335 * A shell specification consists of a .SHELL target, with dependency
2336 * operator, followed by a series of blank-separated words. Double
2337 * quotes can be used to use blanks in words. A backslash escapes
2338 * anything (most notably a double-quote and a space) and
2339 * provides the functionality it does in C. Each word consists of
2340 * keyword and value separated by an equal sign. There should be no
2341 * unnecessary spaces in the word. The keywords are as follows:
2342 * name Name of shell.
2343 * path Location of shell.
2344 * quiet Command to turn off echoing.
2345 * echo Command to turn echoing on
2346 * filter Result of turning off echoing that shouldn't be
2348 * echoFlag Flag to turn echoing on at the start
2349 * errFlag Flag to turn error checking on at the start
2350 * hasErrCtl True if shell has error checking control
2351 * newline String literal to represent a newline char
2352 * check Command to turn on error checking if hasErrCtl
2353 * is TRUE or template of command to echo a command
2354 * for which error checking is off if hasErrCtl is
2356 * ignore Command to turn off error checking if hasErrCtl
2357 * is TRUE or template of command to execute a
2358 * command so as to ignore any errors it returns if
2359 * hasErrCtl is FALSE.
2361 *-----------------------------------------------------------------------
2364 Job_ParseShell(char *line)
2371 Boolean fullSpec = FALSE;
2374 while (isspace((unsigned char)*line)) {
2379 free(UNCONST(shellArgv));
2381 memset(&newShell, 0, sizeof(newShell));
2384 * Parse the specification by keyword
2386 words = brk_string(line, &argc, TRUE, &path);
2387 if (words == NULL) {
2388 Error("Unterminated quoted string [%s]", line);
2393 for (path = NULL, argv = words; argc != 0; argc--, argv++) {
2394 if (strncmp(*argv, "path=", 5) == 0) {
2396 } else if (strncmp(*argv, "name=", 5) == 0) {
2397 newShell.name = &argv[0][5];
2399 if (strncmp(*argv, "quiet=", 6) == 0) {
2400 newShell.echoOff = &argv[0][6];
2401 } else if (strncmp(*argv, "echo=", 5) == 0) {
2402 newShell.echoOn = &argv[0][5];
2403 } else if (strncmp(*argv, "filter=", 7) == 0) {
2404 newShell.noPrint = &argv[0][7];
2405 newShell.noPLen = strlen(newShell.noPrint);
2406 } else if (strncmp(*argv, "echoFlag=", 9) == 0) {
2407 newShell.echo = &argv[0][9];
2408 } else if (strncmp(*argv, "errFlag=", 8) == 0) {
2409 newShell.exit = &argv[0][8];
2410 } else if (strncmp(*argv, "hasErrCtl=", 10) == 0) {
2411 char c = argv[0][10];
2412 newShell.hasErrCtl = !((c != 'Y') && (c != 'y') &&
2413 (c != 'T') && (c != 't'));
2414 } else if (strncmp(*argv, "newline=", 8) == 0) {
2415 newShell.newline = &argv[0][8];
2416 } else if (strncmp(*argv, "check=", 6) == 0) {
2417 newShell.errCheck = &argv[0][6];
2418 } else if (strncmp(*argv, "ignore=", 7) == 0) {
2419 newShell.ignErr = &argv[0][7];
2420 } else if (strncmp(*argv, "errout=", 7) == 0) {
2421 newShell.errOut = &argv[0][7];
2422 } else if (strncmp(*argv, "comment=", 8) == 0) {
2423 newShell.commentChar = argv[0][8];
2425 Parse_Error(PARSE_FATAL, "Unknown keyword \"%s\"",
2436 * If no path was given, the user wants one of the pre-defined shells,
2437 * yes? So we find the one s/he wants with the help of JobMatchShell
2438 * and set things up the right way. shellPath will be set up by
2441 if (newShell.name == NULL) {
2442 Parse_Error(PARSE_FATAL, "Neither path nor name specified");
2446 if ((sh = JobMatchShell(newShell.name)) == NULL) {
2447 Parse_Error(PARSE_WARNING, "%s: No matching shell",
2453 shellName = newShell.name;
2455 /* Shell_Init has already been called! Do it again. */
2456 free(UNCONST(shellPath));
2463 * The user provided a path. If s/he gave nothing else (fullSpec is
2464 * FALSE), try and find a matching shell in the ones we know of.
2465 * Else we just take the specification at its word and copy it
2466 * to a new location. In either case, we need to record the
2467 * path the user gave for the shell.
2470 path = strrchr(path, '/');
2472 path = UNCONST(shellPath);
2476 if (newShell.name != NULL) {
2477 shellName = newShell.name;
2482 if ((sh = JobMatchShell(shellName)) == NULL) {
2483 Parse_Error(PARSE_WARNING, "%s: No matching shell",
2490 commandShell = bmake_malloc(sizeof(Shell));
2491 *commandShell = newShell;
2495 if (commandShell->echoOn && commandShell->echoOff) {
2496 commandShell->hasEchoCtl = TRUE;
2499 if (!commandShell->hasErrCtl) {
2500 if (commandShell->errCheck == NULL) {
2501 commandShell->errCheck = "";
2503 if (commandShell->ignErr == NULL) {
2504 commandShell->ignErr = "%s\n";
2509 * Do not free up the words themselves, since they might be in use by the
2510 * shell specification.
2517 *-----------------------------------------------------------------------
2519 * Handle the receipt of an interrupt.
2522 * runINTERRUPT Non-zero if commands for the .INTERRUPT target
2523 * should be executed
2524 * signo signal received
2530 * All children are killed. Another job will be started if the
2531 * .INTERRUPT target was given.
2532 *-----------------------------------------------------------------------
2535 JobInterrupt(int runINTERRUPT, int signo)
2537 Job *job; /* job descriptor in that element */
2538 GNode *interrupt; /* the node describing the .INTERRUPT target */
2542 aborting = ABORT_INTERRUPT;
2546 for (job = job_table; job < job_table_end; job++) {
2547 if (job->job_state != JOB_ST_RUNNING)
2552 if ((gn->type & (OP_JOIN|OP_PHONY)) == 0 && !Targ_Precious(gn)) {
2553 char *file = (gn->path == NULL ? gn->name : gn->path);
2554 if (!noExecute && eunlink(file) != -1) {
2555 Error("*** %s removed", file);
2560 (void)fprintf(debug_file,
2561 "JobInterrupt passing signal %d to child %d.\n",
2564 KILLPG(job->pid, signo);
2568 JobSigUnlock(&mask);
2570 if (runINTERRUPT && !touchFlag) {
2571 interrupt = Targ_FindNode(".INTERRUPT", TARG_NOCREATE);
2572 if (interrupt != NULL) {
2573 ignoreErrors = FALSE;
2577 Trace_Log(MAKEINTR, 0);
2582 *-----------------------------------------------------------------------
2584 * Do final processing such as the running of the commands
2585 * attached to the .END target.
2588 * Number of errors reported.
2592 *-----------------------------------------------------------------------
2597 if (postCommands != NULL &&
2598 (!Lst_IsEmpty(postCommands->commands) ||
2599 !Lst_IsEmpty(postCommands->children))) {
2601 Error("Errors reported so .END ignored");
2603 JobRun(postCommands);
2610 *-----------------------------------------------------------------------
2612 * Cleanup any memory used by the jobs module
2619 *-----------------------------------------------------------------------
2631 *-----------------------------------------------------------------------
2633 * Waits for all running jobs to finish and returns. Sets 'aborting'
2634 * to ABORT_WAIT to prevent other jobs from starting.
2640 * Currently running jobs finish.
2642 *-----------------------------------------------------------------------
2647 aborting = ABORT_WAIT;
2648 while (jobTokensRunning != 0) {
2655 *-----------------------------------------------------------------------
2657 * Abort all currently running jobs without handling output or anything.
2658 * This function is to be called only in the event of a major
2659 * error. Most definitely NOT to be called from JobInterrupt.
2665 * All children are killed, not just the firstborn
2666 *-----------------------------------------------------------------------
2671 Job *job; /* the job descriptor in that element */
2674 aborting = ABORT_ERROR;
2676 if (jobTokensRunning) {
2677 for (job = job_table; job < job_table_end; job++) {
2678 if (job->job_state != JOB_ST_RUNNING)
2681 * kill the child process with increasingly drastic signals to make
2682 * darn sure it's dead.
2684 KILLPG(job->pid, SIGINT);
2685 KILLPG(job->pid, SIGKILL);
2690 * Catch as many children as want to report in at first, then give up
2692 while (waitpid((pid_t) -1, &foo, WNOHANG) > 0)
2698 *-----------------------------------------------------------------------
2700 * Tries to restart stopped jobs if there are slots available.
2701 * Called in process context in response to a SIGCONT.
2709 *-----------------------------------------------------------------------
2712 JobRestartJobs(void)
2716 for (job = job_table; job < job_table_end; job++) {
2717 if (job->job_state == JOB_ST_RUNNING &&
2718 (make_suspended || job->job_suspended)) {
2720 (void)fprintf(debug_file, "Restarting stopped job pid %d.\n",
2723 if (job->job_suspended) {
2724 (void)printf("*** [%s] Continued\n", job->node->name);
2725 (void)fflush(stdout);
2727 job->job_suspended = 0;
2728 if (KILLPG(job->pid, SIGCONT) != 0 && DEBUG(JOB)) {
2729 fprintf(debug_file, "Failed to send SIGCONT to %d\n", job->pid);
2732 if (job->job_state == JOB_ST_FINISHED)
2733 /* Job exit deferred after calling waitpid() in a signal handler */
2734 JobFinish(job, job->exit_status);
2742 if (job->inPollfd != NULL)
2743 Punt("Watching watched job");
2745 fds[nfds].fd = job->inPipe;
2746 fds[nfds].events = POLLIN;
2748 job->inPollfd = &fds[nfds];
2756 if (job->inPollfd == NULL)
2757 Punt("Unwatching unwatched job");
2758 i = job->inPollfd - fds;
2761 * Move last job in table into hole made by dead job.
2765 jobfds[i] = jobfds[nfds];
2766 jobfds[i]->inPollfd = &fds[i];
2768 job->inPollfd = NULL;
2774 if (job->inPollfd == NULL)
2775 Punt("Polling unwatched job");
2776 return (job->inPollfd->revents & POLLIN) != 0;
2780 *-----------------------------------------------------------------------
2782 * Put a token into the job pipe so that some make process can start
2786 * Allows more build jobs to be spawned somewhere.
2788 *-----------------------------------------------------------------------
2794 char tok = JOB_TOKENS[aborting], tok1;
2796 /* If we are depositing an error token flush everything else */
2797 while (tok != '+' && read(tokenWaitJob.inPipe, &tok1, 1) == 1)
2801 fprintf(debug_file, "(%d) aborting %d, deposit token %c\n",
2802 getpid(), aborting, JOB_TOKENS[aborting]);
2803 while (write(tokenWaitJob.outPipe, &tok, 1) == -1 && errno == EAGAIN)
2808 *-----------------------------------------------------------------------
2809 * Job_ServerStartTokenAdd --
2810 * Prep the job token pipe in the root make process.
2812 *-----------------------------------------------------------------------
2816 Job_ServerStart(int max_tokens, int jp_0, int jp_1)
2821 if (jp_0 >= 0 && jp_1 >= 0) {
2822 /* Pipe passed in from parent */
2823 tokenWaitJob.inPipe = jp_0;
2824 tokenWaitJob.outPipe = jp_1;
2828 JobCreatePipe(&tokenWaitJob, 15);
2830 snprintf(jobarg, sizeof(jobarg), "%d,%d",
2831 tokenWaitJob.inPipe, tokenWaitJob.outPipe);
2833 Var_Append(MAKEFLAGS, "-J", VAR_GLOBAL);
2834 Var_Append(MAKEFLAGS, jobarg, VAR_GLOBAL);
2837 * Preload the job pipe with one token per job, save the one
2838 * "extra" token for the primary job.
2840 * XXX should clip maxJobs against PIPE_BUF -- if max_tokens is
2841 * larger than the write buffer size of the pipe, we will
2844 for (i = 1; i < max_tokens; i++)
2849 *-----------------------------------------------------------------------
2850 * Job_TokenReturn --
2851 * Return a withdrawn token to the pool.
2853 *-----------------------------------------------------------------------
2857 Job_TokenReturn(void)
2860 if (jobTokensRunning < 0)
2861 Punt("token botch");
2862 if (jobTokensRunning || JOB_TOKENS[aborting] != '+')
2867 *-----------------------------------------------------------------------
2868 * Job_TokenWithdraw --
2869 * Attempt to withdraw a token from the pool.
2872 * Returns TRUE if a token was withdrawn, and FALSE if the pool
2873 * is currently empty.
2876 * If pool is empty, set wantToken so that we wake up
2877 * when a token is released.
2879 *-----------------------------------------------------------------------
2884 Job_TokenWithdraw(void)
2891 fprintf(debug_file, "Job_TokenWithdraw(%d): aborting %d, running %d\n",
2892 getpid(), aborting, jobTokensRunning);
2894 if (aborting || (jobTokensRunning >= maxJobs))
2897 count = read(tokenWaitJob.inPipe, &tok, 1);
2899 Fatal("eof on job pipe!");
2900 if (count < 0 && jobTokensRunning != 0) {
2901 if (errno != EAGAIN) {
2902 Fatal("job pipe read: %s", strerror(errno));
2905 fprintf(debug_file, "(%d) blocked for token\n", getpid());
2910 if (count == 1 && tok != '+') {
2911 /* make being abvorted - remove any other job tokens */
2913 fprintf(debug_file, "(%d) aborted by token %c\n", getpid(), tok);
2914 while (read(tokenWaitJob.inPipe, &tok1, 1) == 1)
2916 /* And put the stopper back */
2917 while (write(tokenWaitJob.outPipe, &tok, 1) == -1 && errno == EAGAIN)
2919 Fatal("A failure has been detected in another branch of the parallel make");
2922 if (count == 1 && jobTokensRunning == 0)
2923 /* We didn't want the token really */
2924 while (write(tokenWaitJob.outPipe, &tok, 1) == -1 && errno == EAGAIN)
2929 fprintf(debug_file, "(%d) withdrew token\n", getpid());
2935 emul_poll(struct pollfd *fd, int nfd, int timeout)
2938 int i, maxfd, nselect, npoll;
2939 struct timeval tv, *tvp;
2946 for (i = 0; i < nfd; i++) {
2949 if (fd[i].events & POLLIN)
2950 FD_SET(fd[i].fd, &rfds);
2952 if (fd[i].events & POLLOUT)
2953 FD_SET(fd[i].fd, &wfds);
2955 if (fd[i].fd > maxfd)
2959 if (maxfd >= FD_SETSIZE) {
2960 Punt("Ran out of fd_set slots; "
2961 "recompile with a larger FD_SETSIZE.");
2967 usecs = timeout * 1000;
2968 tv.tv_sec = usecs / 1000000;
2969 tv.tv_usec = usecs % 1000000;
2973 nselect = select(maxfd + 1, &rfds, &wfds, 0, tvp);
2979 for (i = 0; i < nfd; i++) {
2980 if (FD_ISSET(fd[i].fd, &rfds))
2981 fd[i].revents |= POLLIN;
2983 if (FD_ISSET(fd[i].fd, &wfds))
2984 fd[i].revents |= POLLOUT;
2992 #endif /* USE_SELECT */