1 /* $NetBSD: job.c,v 1.163 2012/07/03 21:03:40 sjg 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 1.163 2012/07/03 21:03:40 sjg Exp $";
75 #include <sys/cdefs.h>
78 static char sccsid[] = "@(#)job.c 8.2 (Berkeley) 3/19/94";
80 __RCSID("$NetBSD: job.c,v 1.163 2012/07/03 21:03:40 sjg 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 write(childExitJob.outPipe, CHILD_EXIT, 1);
498 *-----------------------------------------------------------------------
500 * Resume all stopped jobs.
503 * signo The signal number we've received
509 * Jobs start running again.
511 *-----------------------------------------------------------------------
514 JobContinueSig(int signo MAKE_ATTR_UNUSED)
517 * Defer sending to SIGCONT to our stopped children until we return
518 * from the signal handler.
520 write(childExitJob.outPipe, DO_JOB_RESUME, 1);
524 *-----------------------------------------------------------------------
526 * Pass a signal on to all jobs, then resend to ourselves.
529 * signo The signal number we've received
535 * We die by the same signal.
537 *-----------------------------------------------------------------------
539 MAKE_ATTR_DEAD static void
540 JobPassSig_int(int signo)
542 /* Run .INTERRUPT target then exit */
543 JobInterrupt(TRUE, signo);
546 MAKE_ATTR_DEAD static void
547 JobPassSig_term(int signo)
549 /* Dont run .INTERRUPT target then exit */
550 JobInterrupt(FALSE, signo);
554 JobPassSig_suspend(int signo)
556 sigset_t nmask, omask;
557 struct sigaction act;
559 /* Suppress job started/continued messages */
562 /* Pass the signal onto every job */
563 JobCondPassSig(signo);
566 * Send ourselves the signal now we've given the message to everyone else.
567 * Note we block everything else possible while we're getting the signal.
568 * This ensures that all our jobs get continued when we wake up before
569 * we take any other signal.
572 sigdelset(&nmask, signo);
573 (void)sigprocmask(SIG_SETMASK, &nmask, &omask);
575 act.sa_handler = SIG_DFL;
576 sigemptyset(&act.sa_mask);
578 (void)sigaction(signo, &act, NULL);
581 (void)fprintf(debug_file,
582 "JobPassSig passing signal %d to self.\n", signo);
585 (void)kill(getpid(), signo);
588 * We've been continued.
590 * A whole host of signals continue to happen!
591 * SIGCHLD for any processes that actually suspended themselves.
592 * SIGCHLD for any processes that exited while we were alseep.
593 * The SIGCONT that actually caused us to wakeup.
595 * Since we defer passing the SIGCONT on to our children until
596 * the main processing loop, we can be sure that all the SIGCHLD
597 * events will have happened by then - and that the waitpid() will
598 * collect the child 'suspended' events.
599 * For correct sequencing we just need to ensure we process the
600 * waitpid() before passign on the SIGCONT.
602 * In any case nothing else is needed here.
605 /* Restore handler and signal mask */
606 act.sa_handler = JobPassSig_suspend;
607 (void)sigaction(signo, &act, NULL);
608 (void)sigprocmask(SIG_SETMASK, &omask, NULL);
612 *-----------------------------------------------------------------------
614 * Compare the pid of the job with the given pid and return 0 if they
615 * are equal. This function is called from Job_CatchChildren
616 * to find the job descriptor of the finished job.
620 * pid process id desired
623 * Job with matching pid
627 *-----------------------------------------------------------------------
630 JobFindPid(int pid, int status, Boolean isJobs)
634 for (job = job_table; job < job_table_end; job++) {
635 if ((job->job_state == status) && job->pid == pid)
638 if (DEBUG(JOB) && isJobs)
639 job_table_dump("no pid");
644 *-----------------------------------------------------------------------
646 * Put out another command for the given job. If the command starts
647 * with an @ or a - we process it specially. In the former case,
648 * so long as the -s and -n flags weren't given to make, we stick
649 * a shell-specific echoOff command in the script. In the latter,
650 * we ignore errors for the entire job, unless the shell has error
652 * If the command is just "..." we take all future commands for this
653 * job to be commands to be executed once the entire graph has been
654 * made and return non-zero to signal that the end of the commands
655 * was reached. These commands are later attached to the postCommands
656 * node and executed by Job_End when all things are done.
657 * This function is called from JobStart via Lst_ForEach.
660 * cmdp command string to print
661 * jobp job for which to print it
664 * Always 0, unless the command was "..."
667 * If the command begins with a '-' and the shell has no error control,
668 * the JOB_IGNERR flag is set in the job descriptor.
669 * If the command is "..." and we're not ignoring such things,
670 * tailCmds is set to the successor node of the cmd.
671 * numCommands is incremented if the command is actually printed.
672 *-----------------------------------------------------------------------
675 JobPrintCommand(void *cmdp, void *jobp)
677 Boolean noSpecials; /* true if we shouldn't worry about
678 * inserting special commands into
679 * the input stream. */
680 Boolean shutUp = FALSE; /* true if we put a no echo command
681 * into the command file */
682 Boolean errOff = FALSE; /* true if we turned error checking
683 * off before printing the command
684 * and need to turn it back on */
685 const char *cmdTemplate; /* Template to use when printing the
687 char *cmdStart; /* Start of expanded command */
688 char *escCmd = NULL; /* Command with quotes/backticks escaped */
689 char *cmd = (char *)cmdp;
690 Job *job = (Job *)jobp;
694 noSpecials = NoExecute(job->node);
696 if (strcmp(cmd, "...") == 0) {
697 job->node->type |= OP_SAVE_CMDS;
698 if ((job->flags & JOB_IGNDOTS) == 0) {
699 job->tailCmds = Lst_Succ(Lst_Member(job->node->commands,
706 #define DBPRINTF(fmt, arg) if (DEBUG(JOB)) { \
707 (void)fprintf(debug_file, fmt, arg); \
709 (void)fprintf(job->cmdFILE, fmt, arg); \
710 (void)fflush(job->cmdFILE);
714 cmdStart = cmd = Var_Subst(NULL, cmd, job->node, FALSE);
716 cmdTemplate = "%s\n";
719 * Check for leading @' and -'s to control echoing and error checking.
721 while (*cmd == '@' || *cmd == '-' || (*cmd == '+')) {
724 shutUp = DEBUG(LOUD) ? FALSE : TRUE;
727 job->flags |= JOB_IGNERR;
733 * We're not actually executing anything...
734 * but this one needs to be - use compat mode just for it.
736 CompatRunCommand(cmdp, job->node);
744 while (isspace((unsigned char) *cmd))
748 * If the shell doesn't have error control the alternate echo'ing will
749 * be done (to avoid showing additional error checking code)
750 * and this will need the characters '$ ` \ "' escaped
753 if (!commandShell->hasErrCtl) {
754 /* Worst that could happen is every char needs escaping. */
755 escCmd = bmake_malloc((strlen(cmd) * 2) + 1);
756 for (i = 0, j= 0; cmd[i] != '\0'; i++, j++) {
757 if (cmd[i] == '$' || cmd[i] == '`' || cmd[i] == '\\' ||
766 if (!(job->flags & JOB_SILENT) && !noSpecials &&
767 commandShell->hasEchoCtl) {
768 DBPRINTF("%s\n", commandShell->echoOff);
770 if (commandShell->hasErrCtl)
777 if (commandShell->hasErrCtl) {
779 * we don't want the error-control commands showing
780 * up either, so we turn off echoing while executing
781 * them. We could put another field in the shell
782 * structure to tell JobDoOutput to look for this
783 * string too, but why make it any more complex than
786 if (!(job->flags & JOB_SILENT) && !shutUp &&
787 commandShell->hasEchoCtl) {
788 DBPRINTF("%s\n", commandShell->echoOff);
789 DBPRINTF("%s\n", commandShell->ignErr);
790 DBPRINTF("%s\n", commandShell->echoOn);
792 DBPRINTF("%s\n", commandShell->ignErr);
794 } else if (commandShell->ignErr &&
795 (*commandShell->ignErr != '\0'))
798 * The shell has no error control, so we need to be
799 * weird to get it to ignore any errors from the command.
800 * If echoing is turned on, we turn it off and use the
801 * errCheck template to echo the command. Leave echoing
802 * off so the user doesn't see the weirdness we go through
803 * to ignore errors. Set cmdTemplate to use the weirdness
804 * instead of the simple "%s\n" template.
806 if (!(job->flags & JOB_SILENT) && !shutUp) {
807 if (commandShell->hasEchoCtl) {
808 DBPRINTF("%s\n", commandShell->echoOff);
810 DBPRINTF(commandShell->errCheck, escCmd);
814 DBPRINTF(commandShell->errCheck, escCmd);
817 cmdTemplate = commandShell->ignErr;
819 * The error ignoration (hee hee) is already taken care
820 * of by the ignErr template, so pretend error checking
833 * If errors are being checked and the shell doesn't have error control
834 * but does supply an errOut template, then setup commands to run
838 if (!commandShell->hasErrCtl && commandShell->errOut &&
839 (*commandShell->errOut != '\0')) {
840 if (!(job->flags & JOB_SILENT) && !shutUp) {
841 if (commandShell->hasEchoCtl) {
842 DBPRINTF("%s\n", commandShell->echoOff);
844 DBPRINTF(commandShell->errCheck, escCmd);
847 /* If it's a comment line or blank, treat as an ignored error */
848 if ((escCmd[0] == commandShell->commentChar) ||
850 cmdTemplate = commandShell->ignErr;
852 cmdTemplate = commandShell->errOut;
857 if (DEBUG(SHELL) && strcmp(shellName, "sh") == 0 &&
858 (job->flags & JOB_TRACED) == 0) {
859 DBPRINTF("set -%s\n", "x");
860 job->flags |= JOB_TRACED;
863 if ((cp = Check_Cwd_Cmd(cmd)) != NULL) {
864 DBPRINTF("test -d %s && ", cp);
865 DBPRINTF("cd %s\n", cp);
868 DBPRINTF(cmdTemplate, cmd);
874 * If echoing is already off, there's no point in issuing the
875 * echoOff command. Otherwise we issue it and pretend it was on
876 * for the whole command...
878 if (!shutUp && !(job->flags & JOB_SILENT) && commandShell->hasEchoCtl){
879 DBPRINTF("%s\n", commandShell->echoOff);
882 DBPRINTF("%s\n", commandShell->errCheck);
884 if (shutUp && commandShell->hasEchoCtl) {
885 DBPRINTF("%s\n", commandShell->echoOn);
888 DBPRINTF("test -d %s && ", cp);
889 DBPRINTF("cd %s\n", Var_Value(".OBJDIR", VAR_GLOBAL, &tmp));
895 *-----------------------------------------------------------------------
897 * Save a command to be executed when everything else is done.
898 * Callback function for JobFinish...
904 * The command is tacked onto the end of postCommands's commands list.
906 *-----------------------------------------------------------------------
909 JobSaveCommand(void *cmd, void *gn)
911 cmd = Var_Subst(NULL, (char *)cmd, (GNode *)gn, FALSE);
912 (void)Lst_AtEnd(postCommands->commands, cmd);
918 *-----------------------------------------------------------------------
920 * Called to close both input and output pipes when a job is finished.
926 * The file descriptors associated with the job are closed.
928 *-----------------------------------------------------------------------
934 (void)close(job->outPipe);
937 JobDoOutput(job, TRUE);
938 (void)close(job->inPipe);
943 *-----------------------------------------------------------------------
945 * Do final processing for the given job including updating
946 * parents and starting new jobs as available/necessary. Note
947 * that we pay no attention to the JOB_IGNERR flag here.
948 * This is because when we're called because of a noexecute flag
949 * or something, jstat.w_status is 0 and when called from
950 * Job_CatchChildren, the status is zeroed if it s/b ignored.
954 * status sub-why job went away
960 * Final commands for the job are placed on postCommands.
962 * If we got an error and are aborting (aborting == ABORT_ERROR) and
963 * the job list is now empty, we are done for the day.
964 * If we recognized an error (errors !=0), we set the aborting flag
965 * to ABORT_ERROR so no more jobs will be started.
966 *-----------------------------------------------------------------------
970 JobFinish (Job *job, WAIT_T status)
972 Boolean done, return_job_token;
975 fprintf(debug_file, "Jobfinish: %d [%s], status %d\n",
976 job->pid, job->node->name, status);
979 if ((WIFEXITED(status) &&
980 (((WEXITSTATUS(status) != 0) && !(job->flags & JOB_IGNERR)))) ||
984 * If it exited non-zero and either we're doing things our
985 * way or we're not ignoring errors, the job is finished.
986 * Similarly, if the shell died because of a signal
987 * the job is also finished. In these
988 * cases, finish out the job's output before printing the exit
992 if (job->cmdFILE != NULL && job->cmdFILE != stdout) {
993 (void)fclose(job->cmdFILE);
997 } else if (WIFEXITED(status)) {
999 * Deal with ignored errors in -B mode. We need to print a message
1000 * telling of the ignored error as well as setting status.w_status
1001 * to 0 so the next command gets run. To do this, we set done to be
1002 * TRUE if in -B mode and the job exited non-zero.
1004 done = WEXITSTATUS(status) != 0;
1006 * Old comment said: "Note we don't
1007 * want to close down any of the streams until we know we're at the
1009 * But we do. Otherwise when are we going to print the rest of the
1015 * No need to close things down or anything.
1021 if (WIFEXITED(status)) {
1023 (void)fprintf(debug_file, "Process %d [%s] exited.\n",
1024 job->pid, job->node->name);
1026 if (WEXITSTATUS(status) != 0) {
1027 if (job->node != lastNode) {
1028 MESSAGE(stdout, job->node);
1029 lastNode = job->node;
1033 meta_job_error(job, job->node, job->flags, WEXITSTATUS(status));
1036 (void)printf("*** [%s] Error code %d%s\n",
1038 WEXITSTATUS(status),
1039 (job->flags & JOB_IGNERR) ? " (ignored)" : "");
1040 if (job->flags & JOB_IGNERR) {
1041 WAIT_STATUS(status) = 0;
1043 PrintOnError(job->node, NULL);
1045 } else if (DEBUG(JOB)) {
1046 if (job->node != lastNode) {
1047 MESSAGE(stdout, job->node);
1048 lastNode = job->node;
1050 (void)printf("*** [%s] Completed successfully\n",
1054 if (job->node != lastNode) {
1055 MESSAGE(stdout, job->node);
1056 lastNode = job->node;
1058 (void)printf("*** [%s] Signal %d\n",
1059 job->node->name, WTERMSIG(status));
1061 (void)fflush(stdout);
1066 meta_job_finish(job);
1070 return_job_token = FALSE;
1072 Trace_Log(JOBEND, job);
1073 if (!(job->flags & JOB_SPECIAL)) {
1074 if ((WAIT_STATUS(status) != 0) ||
1075 (aborting == ABORT_ERROR) ||
1076 (aborting == ABORT_INTERRUPT))
1077 return_job_token = TRUE;
1080 if ((aborting != ABORT_ERROR) && (aborting != ABORT_INTERRUPT) &&
1081 (WAIT_STATUS(status) == 0)) {
1083 * As long as we aren't aborting and the job didn't return a non-zero
1084 * status that we shouldn't ignore, we call Make_Update to update
1085 * the parents. In addition, any saved commands for the node are placed
1086 * on the .END target.
1088 if (job->tailCmds != NULL) {
1089 Lst_ForEachFrom(job->node->commands, job->tailCmds,
1093 job->node->made = MADE;
1094 if (!(job->flags & JOB_SPECIAL))
1095 return_job_token = TRUE;
1096 Make_Update(job->node);
1097 job->job_state = JOB_ST_FREE;
1098 } else if (WAIT_STATUS(status)) {
1100 job->job_state = JOB_ST_FREE;
1104 * Set aborting if any error.
1106 if (errors && !keepgoing && (aborting != ABORT_INTERRUPT)) {
1108 * If we found any errors in this batch of children and the -k flag
1109 * wasn't given, we set the aborting flag so no more jobs get
1112 aborting = ABORT_ERROR;
1115 if (return_job_token)
1118 if (aborting == ABORT_ERROR && jobTokensRunning == 0) {
1120 * If we are aborting and the job table is now empty, we finish.
1127 *-----------------------------------------------------------------------
1129 * Touch the given target. Called by JobStart when the -t flag was
1133 * gn the node of the file to touch
1134 * silent TRUE if should not print message
1140 * The data modification of the file is changed. In addition, if the
1141 * file did not exist, it is created.
1142 *-----------------------------------------------------------------------
1145 Job_Touch(GNode *gn, Boolean silent)
1147 int streamID; /* ID of stream opened to do the touch */
1148 struct utimbuf times; /* Times for utime() call */
1150 if (gn->type & (OP_JOIN|OP_USE|OP_USEBEFORE|OP_EXEC|OP_OPTIONAL|
1151 OP_SPECIAL|OP_PHONY)) {
1153 * .JOIN, .USE, .ZEROTIME and .OPTIONAL targets are "virtual" targets
1154 * and, as such, shouldn't really be created.
1159 if (!silent || NoExecute(gn)) {
1160 (void)fprintf(stdout, "touch %s\n", gn->name);
1161 (void)fflush(stdout);
1164 if (NoExecute(gn)) {
1168 if (gn->type & OP_ARCHV) {
1170 } else if (gn->type & OP_LIB) {
1173 char *file = gn->path ? gn->path : gn->name;
1175 times.actime = times.modtime = now;
1176 if (utime(file, ×) < 0){
1177 streamID = open(file, O_RDWR | O_CREAT, 0666);
1179 if (streamID >= 0) {
1183 * Read and write a byte to the file to change the
1184 * modification time, then close the file.
1186 if (read(streamID, &c, 1) == 1) {
1187 (void)lseek(streamID, (off_t)0, SEEK_SET);
1188 (void)write(streamID, &c, 1);
1191 (void)close(streamID);
1193 (void)fprintf(stdout, "*** couldn't touch %s: %s",
1194 file, strerror(errno));
1195 (void)fflush(stdout);
1202 *-----------------------------------------------------------------------
1203 * Job_CheckCommands --
1204 * Make sure the given node has all the commands it needs.
1207 * gn The target whose commands need verifying
1208 * abortProc Function to abort with message
1211 * TRUE if the commands list is/was ok.
1214 * The node will have commands from the .DEFAULT rule added to it
1216 *-----------------------------------------------------------------------
1219 Job_CheckCommands(GNode *gn, void (*abortProc)(const char *, ...))
1221 if (OP_NOP(gn->type) && Lst_IsEmpty(gn->commands) &&
1222 ((gn->type & OP_LIB) == 0 || Lst_IsEmpty(gn->children))) {
1224 * No commands. Look for .DEFAULT rule from which we might infer
1227 if ((DEFAULT != NULL) && !Lst_IsEmpty(DEFAULT->commands) &&
1228 (gn->type & OP_SPECIAL) == 0) {
1231 * Make only looks for a .DEFAULT if the node was never the
1232 * target of an operator, so that's what we do too. If
1233 * a .DEFAULT was given, we substitute its commands for gn's
1234 * commands and set the IMPSRC variable to be the target's name
1235 * The DEFAULT node acts like a transformation rule, in that
1236 * gn also inherits any attributes or sources attached to
1239 Make_HandleUse(DEFAULT, gn);
1240 Var_Set(IMPSRC, Var_Value(TARGET, gn, &p1), gn, 0);
1243 } else if (Dir_MTime(gn, 0) == 0 && (gn->type & OP_SPECIAL) == 0) {
1245 * The node wasn't the target of an operator we have no .DEFAULT
1246 * rule to go on and the target doesn't already exist. There's
1247 * nothing more we can do for this branch. If the -k flag wasn't
1248 * given, we stop in our tracks, otherwise we just don't update
1249 * this node's parents so they never get examined.
1251 static const char msg[] = ": don't know how to make";
1253 if (gn->flags & FROM_DEPEND) {
1254 fprintf(stdout, "%s: ignoring stale %s for %s\n",
1255 progname, makeDependfile, gn->name);
1259 if (gn->type & OP_OPTIONAL) {
1260 (void)fprintf(stdout, "%s%s %s (ignored)\n", progname,
1262 (void)fflush(stdout);
1263 } else if (keepgoing) {
1264 (void)fprintf(stdout, "%s%s %s (continuing)\n", progname,
1266 (void)fflush(stdout);
1269 (*abortProc)("%s%s %s. Stop", progname, msg, gn->name);
1278 *-----------------------------------------------------------------------
1280 * Execute the shell for the given job. Called from JobStart
1283 * job Job to execute
1289 * A shell is executed, outputs is altered and the Job structure added
1292 *-----------------------------------------------------------------------
1295 JobExec(Job *job, char **argv)
1297 int cpid; /* ID of new child */
1300 job->flags &= ~JOB_TRACED;
1305 (void)fprintf(debug_file, "Running %s %sly\n", job->node->name, "local");
1306 (void)fprintf(debug_file, "\tCommand: ");
1307 for (i = 0; argv[i] != NULL; i++) {
1308 (void)fprintf(debug_file, "%s ", argv[i]);
1310 (void)fprintf(debug_file, "\n");
1314 * Some jobs produce no output and it's disconcerting to have
1315 * no feedback of their running (since they produce no output, the
1316 * banner with their name in it never appears). This is an attempt to
1317 * provide that feedback, even if nothing follows it.
1319 if ((lastNode != job->node) && !(job->flags & JOB_SILENT)) {
1320 MESSAGE(stdout, job->node);
1321 lastNode = job->node;
1324 /* No interruptions until this job is on the `jobs' list */
1327 /* Pre-emptively mark job running, pid still zero though */
1328 job->job_state = JOB_ST_RUNNING;
1332 Punt("Cannot vfork: %s", strerror(errno));
1340 meta_job_child(job);
1344 * Reset all signal handlers; this is necessary because we also
1345 * need to unblock signals before we exec(2).
1349 /* Now unblock signals */
1350 sigemptyset(&tmask);
1351 JobSigUnlock(&tmask);
1354 * Must duplicate the input stream down to the child's input and
1355 * reset it to the beginning (again). Since the stream was marked
1356 * close-on-exec, we must clear that bit in the new input.
1358 if (dup2(FILENO(job->cmdFILE), 0) == -1) {
1359 execError("dup2", "job->cmdFILE");
1362 (void)fcntl(0, F_SETFD, 0);
1363 (void)lseek(0, (off_t)0, SEEK_SET);
1365 if (job->node->type & OP_MAKE) {
1367 * Pass job token pipe to submakes.
1369 fcntl(tokenWaitJob.inPipe, F_SETFD, 0);
1370 fcntl(tokenWaitJob.outPipe, F_SETFD, 0);
1374 * Set up the child's output to be routed through the pipe
1375 * we've created for it.
1377 if (dup2(job->outPipe, 1) == -1) {
1378 execError("dup2", "job->outPipe");
1382 * The output channels are marked close on exec. This bit was
1383 * duplicated by the dup2(on some systems), so we have to clear
1384 * it before routing the shell's error output to the same place as
1385 * its standard output.
1387 (void)fcntl(1, F_SETFD, 0);
1388 if (dup2(1, 2) == -1) {
1389 execError("dup2", "1, 2");
1394 * We want to switch the child into a different process family so
1395 * we can kill it and all its descendants in one fell swoop,
1396 * by killing its process family, but not commit suicide.
1398 #if defined(HAVE_SETPGID)
1399 (void)setpgid(0, getpid());
1401 #if defined(HAVE_SETSID)
1402 /* XXX: dsl - I'm sure this should be setpgrp()... */
1405 (void)setpgrp(0, getpid());
1411 (void)execv(shellPath, argv);
1412 execError("exec", shellPath);
1416 /* Parent, continuing after the child exec */
1419 Trace_Log(JOBSTART, job);
1422 * Set the current position in the buffer to the beginning
1423 * and mark another stream to watch in the outputs mask
1429 if (job->cmdFILE != NULL && job->cmdFILE != stdout) {
1430 (void)fclose(job->cmdFILE);
1431 job->cmdFILE = NULL;
1435 * Now the job is actually running, add it to the table.
1438 fprintf(debug_file, "JobExec(%s): pid %d added to jobs table\n",
1439 job->node->name, job->pid);
1440 job_table_dump("job started");
1442 JobSigUnlock(&mask);
1446 *-----------------------------------------------------------------------
1448 * Create the argv needed to execute the shell for a given job.
1455 *-----------------------------------------------------------------------
1458 JobMakeArgv(Job *job, char **argv)
1461 static char args[10]; /* For merged arguments */
1463 argv[0] = UNCONST(shellName);
1466 if ((commandShell->exit && (*commandShell->exit != '-')) ||
1467 (commandShell->echo && (*commandShell->echo != '-')))
1470 * At least one of the flags doesn't have a minus before it, so
1471 * merge them together. Have to do this because the *(&(@*#*&#$#
1472 * Bourne shell thinks its second argument is a file to source.
1473 * Grrrr. Note the ten-character limitation on the combined arguments.
1475 (void)snprintf(args, sizeof(args), "-%s%s",
1476 ((job->flags & JOB_IGNERR) ? "" :
1477 (commandShell->exit ? commandShell->exit : "")),
1478 ((job->flags & JOB_SILENT) ? "" :
1479 (commandShell->echo ? commandShell->echo : "")));
1486 if (!(job->flags & JOB_IGNERR) && commandShell->exit) {
1487 argv[argc] = UNCONST(commandShell->exit);
1490 if (!(job->flags & JOB_SILENT) && commandShell->echo) {
1491 argv[argc] = UNCONST(commandShell->echo);
1499 *-----------------------------------------------------------------------
1501 * Start a target-creation process going for the target described
1502 * by the graph node gn.
1505 * gn target to create
1506 * flags flags for the job to override normal ones.
1507 * e.g. JOB_SPECIAL or JOB_IGNDOTS
1508 * previous The previous Job structure for this node, if any.
1511 * JOB_ERROR if there was an error in the commands, JOB_FINISHED
1512 * if there isn't actually anything left to do for the job and
1513 * JOB_RUNNING if the job has been started.
1516 * A new Job node is created and added to the list of running
1517 * jobs. PMake is forked and a child shell created.
1519 * NB: I'm fairly sure that this code is never called with JOB_SPECIAL set
1520 * JOB_IGNDOTS is never set (dsl)
1521 * Also the return value is ignored by everyone.
1522 *-----------------------------------------------------------------------
1525 JobStart(GNode *gn, int flags)
1527 Job *job; /* new job descriptor */
1528 char *argv[10]; /* Argument vector to shell */
1529 Boolean cmdsOK; /* true if the nodes commands were all right */
1530 Boolean noExec; /* Set true if we decide not to run the job */
1531 int tfd; /* File descriptor to the temp file */
1533 for (job = job_table; job < job_table_end; job++) {
1534 if (job->job_state == JOB_ST_FREE)
1537 if (job >= job_table_end)
1538 Punt("JobStart no job slots vacant");
1540 memset(job, 0, sizeof *job);
1541 job->job_state = JOB_ST_SETUP;
1542 if (gn->type & OP_SPECIAL)
1543 flags |= JOB_SPECIAL;
1546 job->tailCmds = NULL;
1549 * Set the initial value of the flags for this job based on the global
1550 * ones and the node's attributes... Any flags supplied by the caller
1551 * are also added to the field.
1554 if (Targ_Ignore(gn)) {
1555 job->flags |= JOB_IGNERR;
1557 if (Targ_Silent(gn)) {
1558 job->flags |= JOB_SILENT;
1560 job->flags |= flags;
1563 * Check the commands now so any attributes from .DEFAULT have a chance
1564 * to migrate to the node
1566 cmdsOK = Job_CheckCommands(gn, Error);
1568 job->inPollfd = NULL;
1570 * If the -n flag wasn't given, we open up OUR (not the child's)
1571 * temporary file to stuff commands in it. The thing is rd/wr so we don't
1572 * need to reopen it to feed it to the shell. If the -n flag *was* given,
1573 * we just set the file to be stdout. Cute, huh?
1575 if (((gn->type & OP_MAKE) && !(noRecursiveExecute)) ||
1576 (!noExecute && !touchFlag)) {
1578 * tfile is the name of a file into which all shell commands are
1579 * put. It is removed before the child shell is executed, unless
1580 * DEBUG(SCRIPT) is set.
1585 * We're serious here, but if the commands were bogus, we're
1589 PrintOnError(gn, NULL); /* provide some clue */
1594 tfd = mkTempFile(TMPPAT, &tfile);
1596 (void)eunlink(tfile);
1597 JobSigUnlock(&mask);
1599 job->cmdFILE = fdopen(tfd, "w+");
1600 if (job->cmdFILE == NULL) {
1601 Punt("Could not fdopen %s", tfile);
1603 (void)fcntl(FILENO(job->cmdFILE), F_SETFD, 1);
1605 * Send the commands to the command file, flush all its buffers then
1606 * rewind and remove the thing.
1612 meta_job_start(job, gn);
1613 if (Targ_Silent(gn)) { /* might have changed */
1614 job->flags |= JOB_SILENT;
1619 * We can do all the commands at once. hooray for sanity
1622 Lst_ForEach(gn->commands, JobPrintCommand, job);
1625 * If we didn't print out any commands to the shell script,
1626 * there's not much point in executing the shell, is there?
1628 if (numCommands == 0) {
1633 } else if (NoExecute(gn)) {
1635 * Not executing anything -- just print all the commands to stdout
1636 * in one fell swoop. This will still set up job->tailCmds correctly.
1638 if (lastNode != gn) {
1639 MESSAGE(stdout, gn);
1642 job->cmdFILE = stdout;
1644 * Only print the commands if they're ok, but don't die if they're
1645 * not -- just let the user know they're bad and keep going. It
1646 * doesn't do any harm in this case and may do some good.
1649 Lst_ForEach(gn->commands, JobPrintCommand, job);
1652 * Don't execute the shell, thank you.
1657 * Just touch the target and note that no shell should be executed.
1658 * Set cmdFILE to stdout to make life easier. Check the commands, too,
1659 * but don't die if they're no good -- it does no harm to keep working
1662 job->cmdFILE = stdout;
1663 Job_Touch(gn, job->flags&JOB_SILENT);
1666 /* Just in case it isn't already... */
1667 (void)fflush(job->cmdFILE);
1670 * If we're not supposed to execute a shell, don't.
1673 if (!(job->flags & JOB_SPECIAL))
1676 * Unlink and close the command file if we opened one
1678 if (job->cmdFILE != stdout) {
1679 if (job->cmdFILE != NULL) {
1680 (void)fclose(job->cmdFILE);
1681 job->cmdFILE = NULL;
1686 * We only want to work our way up the graph if we aren't here because
1687 * the commands for the job were no good.
1689 if (cmdsOK && aborting == 0) {
1690 if (job->tailCmds != NULL) {
1691 Lst_ForEachFrom(job->node->commands, job->tailCmds,
1695 job->node->made = MADE;
1696 Make_Update(job->node);
1698 job->job_state = JOB_ST_FREE;
1699 return cmdsOK ? JOB_FINISHED : JOB_ERROR;
1703 * Set up the control arguments to the shell. This is based on the flags
1704 * set earlier for this job.
1706 JobMakeArgv(job, argv);
1708 /* Create the pipe by which we'll get the shell's output. */
1709 JobCreatePipe(job, 3);
1712 return(JOB_RUNNING);
1716 JobOutput(Job *job, char *cp, char *endp, int msg)
1720 if (commandShell->noPrint) {
1721 ecp = Str_FindSubstring(cp, commandShell->noPrint);
1722 while (ecp != NULL) {
1725 if (!beSilent && msg && job->node != lastNode) {
1726 MESSAGE(stdout, job->node);
1727 lastNode = job->node;
1730 * The only way there wouldn't be a newline after
1731 * this line is if it were the last in the buffer.
1732 * however, since the non-printable comes after it,
1733 * there must be a newline, so we don't print one.
1735 (void)fprintf(stdout, "%s", cp);
1736 (void)fflush(stdout);
1738 cp = ecp + commandShell->noPLen;
1741 * Still more to print, look again after skipping
1742 * the whitespace following the non-printable
1746 while (*cp == ' ' || *cp == '\t' || *cp == '\n') {
1749 ecp = Str_FindSubstring(cp, commandShell->noPrint);
1759 *-----------------------------------------------------------------------
1761 * This function is called at different times depending on
1762 * whether the user has specified that output is to be collected
1763 * via pipes or temporary files. In the former case, we are called
1764 * whenever there is something to read on the pipe. We collect more
1765 * output from the given job and store it in the job's outBuf. If
1766 * this makes up a line, we print it tagged by the job's identifier,
1768 * If output has been collected in a temporary file, we open the
1769 * file and read it line by line, transfering it to our own
1770 * output channel until the file is empty. At which point we
1771 * remove the temporary file.
1772 * In both cases, however, we keep our figurative eye out for the
1773 * 'noPrint' line for the shell from which the output came. If
1774 * we recognize a line, we don't print it. If the command is not
1775 * alone on the line (the character after it is not \0 or \n), we
1776 * do print whatever follows it.
1779 * job the job whose output needs printing
1780 * finish TRUE if this is the last time we'll be called
1787 * curPos may be shifted as may the contents of outBuf.
1788 *-----------------------------------------------------------------------
1791 JobDoOutput(Job *job, Boolean finish)
1793 Boolean gotNL = FALSE; /* true if got a newline */
1794 Boolean fbuf; /* true if our buffer filled up */
1795 int nr; /* number of bytes read */
1796 int i; /* auxiliary index into outBuf */
1797 int max; /* limit for i (end of current data) */
1798 int nRead; /* (Temporary) number of bytes read */
1801 * Read as many bytes as will fit in the buffer.
1807 nRead = read(job->inPipe, &job->outBuf[job->curPos],
1808 JOB_BUFSIZE - job->curPos);
1810 if (errno == EAGAIN)
1813 perror("JobDoOutput(piperead)");
1821 * If we hit the end-of-file (the job is dead), we must flush its
1822 * remaining output, so pretend we read a newline if there's any
1823 * output remaining in the buffer.
1824 * Also clear the 'finish' flag so we stop looping.
1826 if ((nr == 0) && (job->curPos != 0)) {
1827 job->outBuf[job->curPos] = '\n';
1830 } else if (nr == 0) {
1835 * Look for the last newline in the bytes we just got. If there is
1836 * one, break out of the loop with 'i' as its index and gotNL set
1839 max = job->curPos + nr;
1840 for (i = job->curPos + nr - 1; i >= job->curPos; i--) {
1841 if (job->outBuf[i] == '\n') {
1844 } else if (job->outBuf[i] == '\0') {
1848 job->outBuf[i] = ' ';
1854 if (job->curPos == JOB_BUFSIZE) {
1856 * If we've run out of buffer space, we have no choice
1857 * but to print the stuff. sigh.
1863 if (gotNL || fbuf) {
1865 * Need to send the output to the screen. Null terminate it
1866 * first, overwriting the newline character if there was one.
1867 * So long as the line isn't one we should filter (according
1868 * to the shell description), we print the line, preceded
1869 * by a target banner if this target isn't the same as the
1870 * one for which we last printed something.
1871 * The rest of the data in the buffer are then shifted down
1872 * to the start of the buffer and curPos is set accordingly.
1874 job->outBuf[i] = '\0';
1875 if (i >= job->curPos) {
1878 cp = JobOutput(job, job->outBuf, &job->outBuf[i], FALSE);
1881 * There's still more in that thar buffer. This time, though,
1882 * we know there's no newline at the end, so we add one of
1883 * our own free will.
1886 if (!beSilent && job->node != lastNode) {
1887 MESSAGE(stdout, job->node);
1888 lastNode = job->node;
1892 meta_job_output(job, cp, gotNL ? "\n" : "");
1895 (void)fprintf(stdout, "%s%s", cp, gotNL ? "\n" : "");
1896 (void)fflush(stdout);
1900 /* shift the remaining characters down */
1901 (void)memcpy(job->outBuf, &job->outBuf[i + 1], max - (i + 1));
1902 job->curPos = max - (i + 1);
1906 * We have written everything out, so we just start over
1907 * from the start of the buffer. No copying. No nothing.
1914 * If the finish flag is true, we must loop until we hit
1915 * end-of-file on the pipe. This is guaranteed to happen
1916 * eventually since the other end of the pipe is now closed
1917 * (we closed it explicitly and the child has exited). When
1918 * we do get an EOF, finish will be set FALSE and we'll fall
1930 * Unfortunately it is too complicated to run .BEGIN, .END,
1931 * and .INTERRUPT job in the parallel job module. This has
1932 * the nice side effect that it avoids a lot of other problems.
1934 Lst lst = Lst_Init(FALSE);
1935 Lst_AtEnd(lst, targ);
1936 (void)Make_Run(lst);
1937 Lst_Destroy(lst, NULL);
1938 JobStart(targ, JOB_SPECIAL);
1939 while (jobTokensRunning) {
1943 Compat_Make(targ, targ);
1944 if (targ->made == ERROR) {
1945 PrintOnError(targ, "\n\nStop.");
1952 *-----------------------------------------------------------------------
1953 * Job_CatchChildren --
1954 * Handle the exit of a child. Called from Make_Make.
1957 * block TRUE if should block on the wait
1963 * The job descriptor is removed from the list of children.
1966 * We do waits, blocking or not, according to the wisdom of our
1967 * caller, until there are no more children to report. For each
1968 * job, call JobFinish to finish things off.
1970 *-----------------------------------------------------------------------
1974 Job_CatchChildren(void)
1976 int pid; /* pid of dead child */
1977 WAIT_T status; /* Exit/termination status */
1980 * Don't even bother if we know there's no one around.
1982 if (jobTokensRunning == 0)
1985 while ((pid = waitpid((pid_t) -1, &status, WNOHANG | WUNTRACED)) > 0) {
1987 (void)fprintf(debug_file, "Process %d exited/stopped status %x.\n", pid,
1988 WAIT_STATUS(status));
1990 JobReapChild(pid, status, TRUE);
1995 * It is possible that wait[pid]() was called from elsewhere,
1996 * this lets us reap jobs regardless.
1999 JobReapChild(pid_t pid, WAIT_T status, Boolean isJobs)
2001 Job *job; /* job descriptor for dead child */
2004 * Don't even bother if we know there's no one around.
2006 if (jobTokensRunning == 0)
2009 job = JobFindPid(pid, JOB_ST_RUNNING, isJobs);
2012 if (!lurking_children)
2013 Error("Child (%d) status %x not in table?", pid, status);
2015 return; /* not ours */
2017 if (WIFSTOPPED(status)) {
2019 (void)fprintf(debug_file, "Process %d (%s) stopped.\n",
2020 job->pid, job->node->name);
2022 if (!make_suspended) {
2023 switch (WSTOPSIG(status)) {
2025 (void)printf("*** [%s] Suspended\n", job->node->name);
2028 (void)printf("*** [%s] Stopped\n", job->node->name);
2031 (void)printf("*** [%s] Stopped -- signal %d\n",
2032 job->node->name, WSTOPSIG(status));
2034 job->job_suspended = 1;
2036 (void)fflush(stdout);
2040 job->job_state = JOB_ST_FINISHED;
2041 job->exit_status = WAIT_STATUS(status);
2043 JobFinish(job, status);
2047 *-----------------------------------------------------------------------
2048 * Job_CatchOutput --
2049 * Catch the output from our children, if we're using
2050 * pipes do so. Otherwise just block time until we get a
2051 * signal(most likely a SIGCHLD) since there's no point in
2052 * just spinning when there's nothing to do and the reaping
2053 * of a child can wait for a while.
2059 * Output is read from pipes if we're piping.
2060 * -----------------------------------------------------------------------
2063 Job_CatchOutput(void)
2069 (void)fflush(stdout);
2071 /* The first fd in the list is the job token pipe */
2072 nready = poll(fds + 1 - wantToken, nfds - 1 + wantToken, POLL_MSEC);
2074 if (nready < 0 || readyfd(&childExitJob)) {
2077 (void)read(childExitJob.inPipe, &token, 1);
2078 if (token == DO_JOB_RESUME[0])
2079 /* Complete relay requested from our SIGCONT handler */
2081 Job_CatchChildren();
2087 if (wantToken && readyfd(&tokenWaitJob))
2090 for (i = 2; i < nfds; i++) {
2091 if (!fds[i].revents)
2094 if (job->job_state != JOB_ST_RUNNING)
2096 JobDoOutput(job, FALSE);
2101 *-----------------------------------------------------------------------
2103 * Start the creation of a target. Basically a front-end for
2104 * JobStart used by the Make module.
2110 * Another job is started.
2112 *-----------------------------------------------------------------------
2117 (void)JobStart(gn, 0);
2123 if (shellPath == NULL) {
2125 * We are using the default shell, which may be an absolute
2126 * path if DEFSHELL_CUSTOM is defined.
2128 shellName = commandShell->name;
2129 #ifdef DEFSHELL_CUSTOM
2130 if (*shellName == '/') {
2131 shellPath = shellName;
2132 shellName = strrchr(shellPath, '/');
2136 shellPath = str_concat(_PATH_DEFSHELLDIR, shellName, STR_ADDSLASH);
2138 if (commandShell->exit == NULL) {
2139 commandShell->exit = "";
2141 if (commandShell->echo == NULL) {
2142 commandShell->echo = "";
2147 * Returns the string literal that is used in the current command shell
2148 * to produce a newline character.
2151 Shell_GetNewline(void)
2154 return commandShell->newline;
2163 } else if (!Var_Exists(MAKE_JOB_PREFIX, VAR_GLOBAL)) {
2164 Var_Set(MAKE_JOB_PREFIX, "---", VAR_GLOBAL, 0);
2167 targPrefix = Var_Subst(NULL, "${" MAKE_JOB_PREFIX "}", VAR_GLOBAL, 0);
2171 *-----------------------------------------------------------------------
2173 * Initialize the process module
2181 * lists and counters are initialized
2182 *-----------------------------------------------------------------------
2187 GNode *begin; /* node for commands to do at the very start */
2189 /* Allocate space for all the job info */
2190 job_table = bmake_malloc(maxJobs * sizeof *job_table);
2191 memset(job_table, 0, maxJobs * sizeof *job_table);
2192 job_table_end = job_table + maxJobs;
2201 * There is a non-zero chance that we already have children.
2202 * eg after 'make -f- <<EOF'
2203 * Since their termination causes a 'Child (pid) not in table' message,
2204 * Collect the status of any that are already dead, and suppress the
2205 * error message if there are any undead ones.
2209 rval = waitpid((pid_t) -1, &status, WNOHANG);
2213 lurking_children = 1;
2219 JobCreatePipe(&childExitJob, 3);
2221 /* We can only need to wait for tokens, children and output from each job */
2222 fds = bmake_malloc(sizeof (*fds) * (2 + maxJobs));
2223 jobfds = bmake_malloc(sizeof (*jobfds) * (2 + maxJobs));
2225 /* These are permanent entries and take slots 0 and 1 */
2226 watchfd(&tokenWaitJob);
2227 watchfd(&childExitJob);
2229 sigemptyset(&caught_signals);
2231 * Install a SIGCHLD handler.
2233 (void)bmake_signal(SIGCHLD, JobChildSig);
2234 sigaddset(&caught_signals, SIGCHLD);
2236 #define ADDSIG(s,h) \
2237 if (bmake_signal(s, SIG_IGN) != SIG_IGN) { \
2238 sigaddset(&caught_signals, s); \
2239 (void)bmake_signal(s, h); \
2243 * Catch the four signals that POSIX specifies if they aren't ignored.
2244 * JobPassSig will take care of calling JobInterrupt if appropriate.
2246 ADDSIG(SIGINT, JobPassSig_int)
2247 ADDSIG(SIGHUP, JobPassSig_term)
2248 ADDSIG(SIGTERM, JobPassSig_term)
2249 ADDSIG(SIGQUIT, JobPassSig_term)
2252 * There are additional signals that need to be caught and passed if
2253 * either the export system wants to be told directly of signals or if
2254 * we're giving each job its own process group (since then it won't get
2255 * signals from the terminal driver as we own the terminal)
2257 ADDSIG(SIGTSTP, JobPassSig_suspend)
2258 ADDSIG(SIGTTOU, JobPassSig_suspend)
2259 ADDSIG(SIGTTIN, JobPassSig_suspend)
2260 ADDSIG(SIGWINCH, JobCondPassSig)
2261 ADDSIG(SIGCONT, JobContinueSig)
2264 begin = Targ_FindNode(".BEGIN", TARG_NOCREATE);
2266 if (begin != NULL) {
2268 if (begin->made == ERROR) {
2269 PrintOnError(begin, "\n\nStop.");
2273 postCommands = Targ_FindNode(".END", TARG_CREATE);
2276 static void JobSigReset(void)
2279 if (sigismember(&caught_signals, s)) { \
2280 (void)bmake_signal(s, SIG_DFL); \
2293 (void)bmake_signal(SIGCHLD, SIG_DFL);
2297 *-----------------------------------------------------------------------
2299 * Find a shell in 'shells' given its name.
2302 * A pointer to the Shell structure.
2307 *-----------------------------------------------------------------------
2310 JobMatchShell(const char *name)
2314 for (sh = shells; sh->name != NULL; sh++) {
2315 if (strcmp(name, sh->name) == 0)
2322 *-----------------------------------------------------------------------
2324 * Parse a shell specification and set up commandShell, shellPath
2325 * and shellName appropriately.
2328 * line The shell spec
2331 * FAILURE if the specification was incorrect.
2334 * commandShell points to a Shell structure (either predefined or
2335 * created from the shell spec), shellPath is the full path of the
2336 * shell described by commandShell, while shellName is just the
2337 * final component of shellPath.
2340 * A shell specification consists of a .SHELL target, with dependency
2341 * operator, followed by a series of blank-separated words. Double
2342 * quotes can be used to use blanks in words. A backslash escapes
2343 * anything (most notably a double-quote and a space) and
2344 * provides the functionality it does in C. Each word consists of
2345 * keyword and value separated by an equal sign. There should be no
2346 * unnecessary spaces in the word. The keywords are as follows:
2347 * name Name of shell.
2348 * path Location of shell.
2349 * quiet Command to turn off echoing.
2350 * echo Command to turn echoing on
2351 * filter Result of turning off echoing that shouldn't be
2353 * echoFlag Flag to turn echoing on at the start
2354 * errFlag Flag to turn error checking on at the start
2355 * hasErrCtl True if shell has error checking control
2356 * newline String literal to represent a newline char
2357 * check Command to turn on error checking if hasErrCtl
2358 * is TRUE or template of command to echo a command
2359 * for which error checking is off if hasErrCtl is
2361 * ignore Command to turn off error checking if hasErrCtl
2362 * is TRUE or template of command to execute a
2363 * command so as to ignore any errors it returns if
2364 * hasErrCtl is FALSE.
2366 *-----------------------------------------------------------------------
2369 Job_ParseShell(char *line)
2376 Boolean fullSpec = FALSE;
2379 while (isspace((unsigned char)*line)) {
2384 free(UNCONST(shellArgv));
2386 memset(&newShell, 0, sizeof(newShell));
2389 * Parse the specification by keyword
2391 words = brk_string(line, &argc, TRUE, &path);
2392 if (words == NULL) {
2393 Error("Unterminated quoted string [%s]", line);
2398 for (path = NULL, argv = words; argc != 0; argc--, argv++) {
2399 if (strncmp(*argv, "path=", 5) == 0) {
2401 } else if (strncmp(*argv, "name=", 5) == 0) {
2402 newShell.name = &argv[0][5];
2404 if (strncmp(*argv, "quiet=", 6) == 0) {
2405 newShell.echoOff = &argv[0][6];
2406 } else if (strncmp(*argv, "echo=", 5) == 0) {
2407 newShell.echoOn = &argv[0][5];
2408 } else if (strncmp(*argv, "filter=", 7) == 0) {
2409 newShell.noPrint = &argv[0][7];
2410 newShell.noPLen = strlen(newShell.noPrint);
2411 } else if (strncmp(*argv, "echoFlag=", 9) == 0) {
2412 newShell.echo = &argv[0][9];
2413 } else if (strncmp(*argv, "errFlag=", 8) == 0) {
2414 newShell.exit = &argv[0][8];
2415 } else if (strncmp(*argv, "hasErrCtl=", 10) == 0) {
2416 char c = argv[0][10];
2417 newShell.hasErrCtl = !((c != 'Y') && (c != 'y') &&
2418 (c != 'T') && (c != 't'));
2419 } else if (strncmp(*argv, "newline=", 8) == 0) {
2420 newShell.newline = &argv[0][8];
2421 } else if (strncmp(*argv, "check=", 6) == 0) {
2422 newShell.errCheck = &argv[0][6];
2423 } else if (strncmp(*argv, "ignore=", 7) == 0) {
2424 newShell.ignErr = &argv[0][7];
2425 } else if (strncmp(*argv, "errout=", 7) == 0) {
2426 newShell.errOut = &argv[0][7];
2427 } else if (strncmp(*argv, "comment=", 8) == 0) {
2428 newShell.commentChar = argv[0][8];
2430 Parse_Error(PARSE_FATAL, "Unknown keyword \"%s\"",
2441 * If no path was given, the user wants one of the pre-defined shells,
2442 * yes? So we find the one s/he wants with the help of JobMatchShell
2443 * and set things up the right way. shellPath will be set up by
2446 if (newShell.name == NULL) {
2447 Parse_Error(PARSE_FATAL, "Neither path nor name specified");
2451 if ((sh = JobMatchShell(newShell.name)) == NULL) {
2452 Parse_Error(PARSE_WARNING, "%s: No matching shell",
2458 shellName = newShell.name;
2460 /* Shell_Init has already been called! Do it again. */
2461 free(UNCONST(shellPath));
2468 * The user provided a path. If s/he gave nothing else (fullSpec is
2469 * FALSE), try and find a matching shell in the ones we know of.
2470 * Else we just take the specification at its word and copy it
2471 * to a new location. In either case, we need to record the
2472 * path the user gave for the shell.
2475 path = strrchr(path, '/');
2477 path = UNCONST(shellPath);
2481 if (newShell.name != NULL) {
2482 shellName = newShell.name;
2487 if ((sh = JobMatchShell(shellName)) == NULL) {
2488 Parse_Error(PARSE_WARNING, "%s: No matching shell",
2495 commandShell = bmake_malloc(sizeof(Shell));
2496 *commandShell = newShell;
2500 if (commandShell->echoOn && commandShell->echoOff) {
2501 commandShell->hasEchoCtl = TRUE;
2504 if (!commandShell->hasErrCtl) {
2505 if (commandShell->errCheck == NULL) {
2506 commandShell->errCheck = "";
2508 if (commandShell->ignErr == NULL) {
2509 commandShell->ignErr = "%s\n";
2514 * Do not free up the words themselves, since they might be in use by the
2515 * shell specification.
2522 *-----------------------------------------------------------------------
2524 * Handle the receipt of an interrupt.
2527 * runINTERRUPT Non-zero if commands for the .INTERRUPT target
2528 * should be executed
2529 * signo signal received
2535 * All children are killed. Another job will be started if the
2536 * .INTERRUPT target was given.
2537 *-----------------------------------------------------------------------
2540 JobInterrupt(int runINTERRUPT, int signo)
2542 Job *job; /* job descriptor in that element */
2543 GNode *interrupt; /* the node describing the .INTERRUPT target */
2547 aborting = ABORT_INTERRUPT;
2551 for (job = job_table; job < job_table_end; job++) {
2552 if (job->job_state != JOB_ST_RUNNING)
2557 if ((gn->type & (OP_JOIN|OP_PHONY)) == 0 && !Targ_Precious(gn)) {
2558 char *file = (gn->path == NULL ? gn->name : gn->path);
2559 if (!noExecute && eunlink(file) != -1) {
2560 Error("*** %s removed", file);
2565 (void)fprintf(debug_file,
2566 "JobInterrupt passing signal %d to child %d.\n",
2569 KILLPG(job->pid, signo);
2573 JobSigUnlock(&mask);
2575 if (runINTERRUPT && !touchFlag) {
2576 interrupt = Targ_FindNode(".INTERRUPT", TARG_NOCREATE);
2577 if (interrupt != NULL) {
2578 ignoreErrors = FALSE;
2582 Trace_Log(MAKEINTR, 0);
2587 *-----------------------------------------------------------------------
2589 * Do final processing such as the running of the commands
2590 * attached to the .END target.
2593 * Number of errors reported.
2597 *-----------------------------------------------------------------------
2602 if (postCommands != NULL &&
2603 (!Lst_IsEmpty(postCommands->commands) ||
2604 !Lst_IsEmpty(postCommands->children))) {
2606 Error("Errors reported so .END ignored");
2608 JobRun(postCommands);
2615 *-----------------------------------------------------------------------
2617 * Cleanup any memory used by the jobs module
2624 *-----------------------------------------------------------------------
2636 *-----------------------------------------------------------------------
2638 * Waits for all running jobs to finish and returns. Sets 'aborting'
2639 * to ABORT_WAIT to prevent other jobs from starting.
2645 * Currently running jobs finish.
2647 *-----------------------------------------------------------------------
2652 aborting = ABORT_WAIT;
2653 while (jobTokensRunning != 0) {
2660 *-----------------------------------------------------------------------
2662 * Abort all currently running jobs without handling output or anything.
2663 * This function is to be called only in the event of a major
2664 * error. Most definitely NOT to be called from JobInterrupt.
2670 * All children are killed, not just the firstborn
2671 *-----------------------------------------------------------------------
2676 Job *job; /* the job descriptor in that element */
2679 aborting = ABORT_ERROR;
2681 if (jobTokensRunning) {
2682 for (job = job_table; job < job_table_end; job++) {
2683 if (job->job_state != JOB_ST_RUNNING)
2686 * kill the child process with increasingly drastic signals to make
2687 * darn sure it's dead.
2689 KILLPG(job->pid, SIGINT);
2690 KILLPG(job->pid, SIGKILL);
2695 * Catch as many children as want to report in at first, then give up
2697 while (waitpid((pid_t) -1, &foo, WNOHANG) > 0)
2703 *-----------------------------------------------------------------------
2705 * Tries to restart stopped jobs if there are slots available.
2706 * Called in process context in response to a SIGCONT.
2714 *-----------------------------------------------------------------------
2717 JobRestartJobs(void)
2721 for (job = job_table; job < job_table_end; job++) {
2722 if (job->job_state == JOB_ST_RUNNING &&
2723 (make_suspended || job->job_suspended)) {
2725 (void)fprintf(debug_file, "Restarting stopped job pid %d.\n",
2728 if (job->job_suspended) {
2729 (void)printf("*** [%s] Continued\n", job->node->name);
2730 (void)fflush(stdout);
2732 job->job_suspended = 0;
2733 if (KILLPG(job->pid, SIGCONT) != 0 && DEBUG(JOB)) {
2734 fprintf(debug_file, "Failed to send SIGCONT to %d\n", job->pid);
2737 if (job->job_state == JOB_ST_FINISHED)
2738 /* Job exit deferred after calling waitpid() in a signal handler */
2739 JobFinish(job, job->exit_status);
2747 if (job->inPollfd != NULL)
2748 Punt("Watching watched job");
2750 fds[nfds].fd = job->inPipe;
2751 fds[nfds].events = POLLIN;
2753 job->inPollfd = &fds[nfds];
2761 if (job->inPollfd == NULL)
2762 Punt("Unwatching unwatched job");
2763 i = job->inPollfd - fds;
2766 * Move last job in table into hole made by dead job.
2770 jobfds[i] = jobfds[nfds];
2771 jobfds[i]->inPollfd = &fds[i];
2773 job->inPollfd = NULL;
2779 if (job->inPollfd == NULL)
2780 Punt("Polling unwatched job");
2781 return (job->inPollfd->revents & POLLIN) != 0;
2785 *-----------------------------------------------------------------------
2787 * Put a token into the job pipe so that some make process can start
2791 * Allows more build jobs to be spawned somewhere.
2793 *-----------------------------------------------------------------------
2799 char tok = JOB_TOKENS[aborting], tok1;
2801 /* If we are depositing an error token flush everything else */
2802 while (tok != '+' && read(tokenWaitJob.inPipe, &tok1, 1) == 1)
2806 fprintf(debug_file, "(%d) aborting %d, deposit token %c\n",
2807 getpid(), aborting, JOB_TOKENS[aborting]);
2808 write(tokenWaitJob.outPipe, &tok, 1);
2812 *-----------------------------------------------------------------------
2813 * Job_ServerStartTokenAdd --
2814 * Prep the job token pipe in the root make process.
2816 *-----------------------------------------------------------------------
2820 Job_ServerStart(int max_tokens, int jp_0, int jp_1)
2825 if (jp_0 >= 0 && jp_1 >= 0) {
2826 /* Pipe passed in from parent */
2827 tokenWaitJob.inPipe = jp_0;
2828 tokenWaitJob.outPipe = jp_1;
2832 JobCreatePipe(&tokenWaitJob, 15);
2834 snprintf(jobarg, sizeof(jobarg), "%d,%d",
2835 tokenWaitJob.inPipe, tokenWaitJob.outPipe);
2837 Var_Append(MAKEFLAGS, "-J", VAR_GLOBAL);
2838 Var_Append(MAKEFLAGS, jobarg, VAR_GLOBAL);
2841 * Preload the job pipe with one token per job, save the one
2842 * "extra" token for the primary job.
2844 * XXX should clip maxJobs against PIPE_BUF -- if max_tokens is
2845 * larger than the write buffer size of the pipe, we will
2848 for (i = 1; i < max_tokens; i++)
2853 *-----------------------------------------------------------------------
2854 * Job_TokenReturn --
2855 * Return a withdrawn token to the pool.
2857 *-----------------------------------------------------------------------
2861 Job_TokenReturn(void)
2864 if (jobTokensRunning < 0)
2865 Punt("token botch");
2866 if (jobTokensRunning || JOB_TOKENS[aborting] != '+')
2871 *-----------------------------------------------------------------------
2872 * Job_TokenWithdraw --
2873 * Attempt to withdraw a token from the pool.
2876 * Returns TRUE if a token was withdrawn, and FALSE if the pool
2877 * is currently empty.
2880 * If pool is empty, set wantToken so that we wake up
2881 * when a token is released.
2883 *-----------------------------------------------------------------------
2888 Job_TokenWithdraw(void)
2895 fprintf(debug_file, "Job_TokenWithdraw(%d): aborting %d, running %d\n",
2896 getpid(), aborting, jobTokensRunning);
2898 if (aborting || (jobTokensRunning >= maxJobs))
2901 count = read(tokenWaitJob.inPipe, &tok, 1);
2903 Fatal("eof on job pipe!");
2904 if (count < 0 && jobTokensRunning != 0) {
2905 if (errno != EAGAIN) {
2906 Fatal("job pipe read: %s", strerror(errno));
2909 fprintf(debug_file, "(%d) blocked for token\n", getpid());
2914 if (count == 1 && tok != '+') {
2915 /* make being abvorted - remove any other job tokens */
2917 fprintf(debug_file, "(%d) aborted by token %c\n", getpid(), tok);
2918 while (read(tokenWaitJob.inPipe, &tok1, 1) == 1)
2920 /* And put the stopper back */
2921 write(tokenWaitJob.outPipe, &tok, 1);
2922 Fatal("A failure has been detected in another branch of the parallel make");
2925 if (count == 1 && jobTokensRunning == 0)
2926 /* We didn't want the token really */
2927 write(tokenWaitJob.outPipe, &tok, 1);
2931 fprintf(debug_file, "(%d) withdrew token\n", getpid());
2937 emul_poll(struct pollfd *fd, int nfd, int timeout)
2940 int i, maxfd, nselect, npoll;
2941 struct timeval tv, *tvp;
2948 for (i = 0; i < nfd; i++) {
2951 if (fd[i].events & POLLIN)
2952 FD_SET(fd[i].fd, &rfds);
2954 if (fd[i].events & POLLOUT)
2955 FD_SET(fd[i].fd, &wfds);
2957 if (fd[i].fd > maxfd)
2961 if (maxfd >= FD_SETSIZE) {
2962 Punt("Ran out of fd_set slots; "
2963 "recompile with a larger FD_SETSIZE.");
2969 usecs = timeout * 1000;
2970 tv.tv_sec = usecs / 1000000;
2971 tv.tv_usec = usecs % 1000000;
2975 nselect = select(maxfd + 1, &rfds, &wfds, 0, tvp);
2981 for (i = 0; i < nfd; i++) {
2982 if (FD_ISSET(fd[i].fd, &rfds))
2983 fd[i].revents |= POLLIN;
2985 if (FD_ISSET(fd[i].fd, &wfds))
2986 fd[i].revents |= POLLOUT;
2994 #endif /* USE_SELECT */