1 /* $NetBSD: job.c,v 1.227 2020/08/30 19:56:02 rillig 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 1.227 2020/08/30 19:56:02 rillig Exp $";
75 #include <sys/cdefs.h>
78 static char sccsid[] = "@(#)job.c 8.2 (Berkeley) 3/19/94";
80 __RCSID("$NetBSD: job.c,v 1.227 2020/08/30 19:56:02 rillig 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 initialize 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 * FALSE 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>
146 #if !defined(USE_SELECT) && defined(HAVE_POLL_H)
149 #ifndef USE_SELECT /* no poll.h */
152 #if defined(HAVE_SYS_SELECT_H)
153 # include <sys/select.h>
158 #if defined(HAVE_SYS_SOCKET_H)
159 # include <sys/socket.h>
165 #include "pathnames.h"
167 # define STATIC static
170 * error handling variables
172 static int errors = 0; /* number of errors reported */
173 static int aborting = 0; /* why is the make aborting? */
174 #define ABORT_ERROR 1 /* Because of an error */
175 #define ABORT_INTERRUPT 2 /* Because it was interrupted */
176 #define ABORT_WAIT 3 /* Waiting for jobs to finish */
177 #define JOB_TOKENS "+EI+" /* Token to requeue for each abort state */
180 * this tracks the number of tokens currently "out" to build jobs.
182 int jobTokensRunning = 0;
185 * XXX: Avoid SunOS bug... FILENO() is fp->_file, and file
186 * is a char! So when we go above 127 we turn negative!
188 #define FILENO(a) ((unsigned) fileno(a))
191 * post-make command processing. The node postCommands is really just the
192 * .END target but we keep it around to avoid having to search for it
195 static GNode *postCommands = NULL;
196 /* node containing commands to execute when
197 * everything else is done */
198 static int numCommands; /* The number of commands actually printed
199 * for a target. Should this number be
200 * 0, no shell will be executed. */
203 * Return values from JobStart.
205 #define JOB_RUNNING 0 /* Job is running */
206 #define JOB_ERROR 1 /* Error in starting the job */
207 #define JOB_FINISHED 2 /* The job is already finished */
210 * Descriptions for various shells.
212 * The build environment may set DEFSHELL_INDEX to one of
213 * DEFSHELL_INDEX_SH, DEFSHELL_INDEX_KSH, or DEFSHELL_INDEX_CSH, to
214 * select one of the prefedined shells as the default shell.
216 * Alternatively, the build environment may set DEFSHELL_CUSTOM to the
217 * name or the full path of a sh-compatible shell, which will be used as
220 * ".SHELL" lines in Makefiles can choose the default shell from the
221 # set defined here, or add additional shells.
224 #ifdef DEFSHELL_CUSTOM
225 #define DEFSHELL_INDEX_CUSTOM 0
226 #define DEFSHELL_INDEX_SH 1
227 #define DEFSHELL_INDEX_KSH 2
228 #define DEFSHELL_INDEX_CSH 3
229 #else /* !DEFSHELL_CUSTOM */
230 #define DEFSHELL_INDEX_SH 0
231 #define DEFSHELL_INDEX_KSH 1
232 #define DEFSHELL_INDEX_CSH 2
233 #endif /* !DEFSHELL_CUSTOM */
235 #ifndef DEFSHELL_INDEX
236 #define DEFSHELL_INDEX 0 /* DEFSHELL_INDEX_CUSTOM or DEFSHELL_INDEX_SH */
237 #endif /* !DEFSHELL_INDEX */
239 static Shell shells[] = {
240 #ifdef DEFSHELL_CUSTOM
242 * An sh-compatible shell with a non-standard name.
244 * Keep this in sync with the "sh" description below, but avoid
245 * non-portable features that might not be supplied by all
246 * sh-compatible shells.
250 FALSE, "", "", "", 0,
251 FALSE, "echo \"%s\"\n", "%s\n", "{ %s \n} || exit $?\n", "'\n'", '#',
255 #endif /* DEFSHELL_CUSTOM */
257 * SH description. Echo control is also possible and, under
258 * sun UNIX anyway, one can even control error checking.
262 FALSE, "", "", "", 0,
263 FALSE, "echo \"%s\"\n", "%s\n", "{ %s \n} || exit $?\n", "'\n'", '#',
264 #if defined(MAKE_NATIVE) && defined(__NetBSD__)
276 TRUE, "set +v", "set -v", "set +v", 6,
277 FALSE, "echo \"%s\"\n", "%s\n", "{ %s \n} || exit $?\n", "'\n'", '#',
282 * CSH description. The csh can do echo control by playing
283 * with the setting of the 'echo' shell variable. Sadly,
284 * however, it is unable to do error control nicely.
288 TRUE, "unset verbose", "set verbose", "unset verbose", 10,
289 FALSE, "echo \"%s\"\n", "csh -c \"%s || exit 0\"\n", "", "'\\\n'", '#',
297 FALSE, NULL, NULL, NULL, 0,
298 FALSE, NULL, NULL, NULL, NULL, 0,
302 static Shell *commandShell = &shells[DEFSHELL_INDEX]; /* this is the shell to
304 * commands in the Makefile.
306 * Job_ParseShell function */
307 const char *shellPath = NULL, /* full pathname of
308 * executable image */
309 *shellName = NULL; /* last component of shell */
310 char *shellErrFlag = NULL;
311 static char *shellArgv = NULL; /* Custom shell args */
314 STATIC Job *job_table; /* The structures that describe them */
315 STATIC Job *job_table_end; /* job_table + maxJobs */
316 static int wantToken; /* we want a token */
317 static int lurking_children = 0;
318 static int make_suspended = 0; /* non-zero if we've seen a SIGTSTP (etc) */
321 * Set of descriptors of pipes connected to
322 * the output channels of children
324 static struct pollfd *fds = NULL;
325 static Job **jobfds = NULL;
327 static void watchfd(Job *);
328 static void clearfd(Job *);
329 static int readyfd(Job *);
331 STATIC GNode *lastNode; /* The node for which output was most recently
333 static char *targPrefix = NULL; /* What we print at the start of TARG_FMT */
334 static Job tokenWaitJob; /* token wait pseudo-job */
336 static Job childExitJob; /* child exit pseudo-job */
337 #define CHILD_EXIT "."
338 #define DO_JOB_RESUME "R"
340 static const int npseudojobs = 2; /* number of pseudo-jobs */
342 #define TARG_FMT "%s %s ---\n" /* Default format */
343 #define MESSAGE(fp, gn) \
344 if (maxJobs != 1 && targPrefix && *targPrefix) \
345 (void)fprintf(fp, TARG_FMT, targPrefix, gn->name)
347 static sigset_t caught_signals; /* Set of signals we handle */
349 static void JobChildSig(int);
350 static void JobContinueSig(int);
351 static Job *JobFindPid(int, int, Boolean);
352 static int JobPrintCommand(void *, void *);
353 static int JobSaveCommand(void *, void *);
354 static void JobClose(Job *);
355 static void JobExec(Job *, char **);
356 static void JobMakeArgv(Job *, char **);
357 static int JobStart(GNode *, int);
358 static char *JobOutput(Job *, char *, char *, int);
359 static void JobDoOutput(Job *, Boolean);
360 static Shell *JobMatchShell(const char *);
361 static void JobInterrupt(int, int) MAKE_ATTR_DEAD;
362 static void JobRestartJobs(void);
363 static void JobTokenAdd(void);
364 static void JobSigLock(sigset_t *);
365 static void JobSigUnlock(sigset_t *);
366 static void JobSigReset(void);
371 #if defined(USE_FILEMON) && !defined(USE_FILEMON_DEV)
379 job_table_dump(const char *where)
383 fprintf(debug_file, "job table @ %s\n", where);
384 for (job = job_table; job < job_table_end; job++) {
385 fprintf(debug_file, "job %d, status %d, flags %d, pid %d\n",
386 (int)(job - job_table), job->job_state, job->flags, job->pid);
391 * Delete the target of a failed, interrupted, or otherwise
392 * unsuccessful job unless inhibited by .PRECIOUS.
395 JobDeleteTarget(GNode *gn)
397 if ((gn->type & (OP_JOIN|OP_PHONY)) == 0 && !Targ_Precious(gn)) {
398 char *file = (gn->path == NULL ? gn->name : gn->path);
399 if (!noExecute && eunlink(file) != -1) {
400 Error("*** %s removed", file);
406 * JobSigLock/JobSigUnlock
408 * Signal lock routines to get exclusive access. Currently used to
409 * protect `jobs' and `stoppedJobs' list manipulations.
411 static void JobSigLock(sigset_t *omaskp)
413 if (sigprocmask(SIG_BLOCK, &caught_signals, omaskp) != 0) {
414 Punt("JobSigLock: sigprocmask: %s", strerror(errno));
419 static void JobSigUnlock(sigset_t *omaskp)
421 (void)sigprocmask(SIG_SETMASK, omaskp, NULL);
425 JobCreatePipe(Job *job, int minfd)
429 if (pipe(job->jobPipe) == -1)
430 Punt("Cannot create pipe: %s", strerror(errno));
432 for (i = 0; i < 2; i++) {
433 /* Avoid using low numbered fds */
434 fd = fcntl(job->jobPipe[i], F_DUPFD, minfd);
436 close(job->jobPipe[i]);
437 job->jobPipe[i] = fd;
441 /* Set close-on-exec flag for both */
442 if (fcntl(job->jobPipe[0], F_SETFD, FD_CLOEXEC) == -1)
443 Punt("Cannot set close-on-exec: %s", strerror(errno));
444 if (fcntl(job->jobPipe[1], F_SETFD, FD_CLOEXEC) == -1)
445 Punt("Cannot set close-on-exec: %s", strerror(errno));
448 * We mark the input side of the pipe non-blocking; we poll(2) the
449 * pipe when we're waiting for a job token, but we might lose the
450 * race for the token when a new one becomes available, so the read
451 * from the pipe should not block.
453 flags = fcntl(job->jobPipe[0], F_GETFL, 0);
455 Punt("Cannot get flags: %s", strerror(errno));
457 if (fcntl(job->jobPipe[0], F_SETFL, flags) == -1)
458 Punt("Cannot set flags: %s", strerror(errno));
462 *-----------------------------------------------------------------------
464 * Pass a signal to a job
467 * signop Signal to send it
470 * None, except the job may bite it.
472 *-----------------------------------------------------------------------
475 JobCondPassSig(int signo)
480 (void)fprintf(debug_file, "JobCondPassSig(%d) called.\n", signo);
483 for (job = job_table; job < job_table_end; job++) {
484 if (job->job_state != JOB_ST_RUNNING)
487 (void)fprintf(debug_file,
488 "JobCondPassSig passing signal %d to child %d.\n",
491 KILLPG(job->pid, signo);
496 *-----------------------------------------------------------------------
501 * signo The signal number we've received
507 * Sends a token on the child exit pipe to wake us up from
510 *-----------------------------------------------------------------------
513 JobChildSig(int signo MAKE_ATTR_UNUSED)
515 while (write(childExitJob.outPipe, CHILD_EXIT, 1) == -1 && errno == EAGAIN)
521 *-----------------------------------------------------------------------
523 * Resume all stopped jobs.
526 * signo The signal number we've received
532 * Jobs start running again.
534 *-----------------------------------------------------------------------
537 JobContinueSig(int signo MAKE_ATTR_UNUSED)
540 * Defer sending to SIGCONT to our stopped children until we return
541 * from the signal handler.
543 while (write(childExitJob.outPipe, DO_JOB_RESUME, 1) == -1 &&
549 *-----------------------------------------------------------------------
551 * Pass a signal on to all jobs, then resend to ourselves.
554 * signo The signal number we've received
560 * We die by the same signal.
562 *-----------------------------------------------------------------------
564 MAKE_ATTR_DEAD static void
565 JobPassSig_int(int signo)
567 /* Run .INTERRUPT target then exit */
568 JobInterrupt(TRUE, signo);
571 MAKE_ATTR_DEAD static void
572 JobPassSig_term(int signo)
574 /* Dont run .INTERRUPT target then exit */
575 JobInterrupt(FALSE, signo);
579 JobPassSig_suspend(int signo)
581 sigset_t nmask, omask;
582 struct sigaction act;
584 /* Suppress job started/continued messages */
587 /* Pass the signal onto every job */
588 JobCondPassSig(signo);
591 * Send ourselves the signal now we've given the message to everyone else.
592 * Note we block everything else possible while we're getting the signal.
593 * This ensures that all our jobs get continued when we wake up before
594 * we take any other signal.
597 sigdelset(&nmask, signo);
598 (void)sigprocmask(SIG_SETMASK, &nmask, &omask);
600 act.sa_handler = SIG_DFL;
601 sigemptyset(&act.sa_mask);
603 (void)sigaction(signo, &act, NULL);
606 (void)fprintf(debug_file,
607 "JobPassSig passing signal %d to self.\n", signo);
610 (void)kill(getpid(), signo);
613 * We've been continued.
615 * A whole host of signals continue to happen!
616 * SIGCHLD for any processes that actually suspended themselves.
617 * SIGCHLD for any processes that exited while we were alseep.
618 * The SIGCONT that actually caused us to wakeup.
620 * Since we defer passing the SIGCONT on to our children until
621 * the main processing loop, we can be sure that all the SIGCHLD
622 * events will have happened by then - and that the waitpid() will
623 * collect the child 'suspended' events.
624 * For correct sequencing we just need to ensure we process the
625 * waitpid() before passign on the SIGCONT.
627 * In any case nothing else is needed here.
630 /* Restore handler and signal mask */
631 act.sa_handler = JobPassSig_suspend;
632 (void)sigaction(signo, &act, NULL);
633 (void)sigprocmask(SIG_SETMASK, &omask, NULL);
637 *-----------------------------------------------------------------------
639 * Compare the pid of the job with the given pid and return 0 if they
640 * are equal. This function is called from Job_CatchChildren
641 * to find the job descriptor of the finished job.
645 * pid process id desired
648 * Job with matching pid
652 *-----------------------------------------------------------------------
655 JobFindPid(int pid, int status, Boolean isJobs)
659 for (job = job_table; job < job_table_end; job++) {
660 if ((job->job_state == status) && job->pid == pid)
663 if (DEBUG(JOB) && isJobs)
664 job_table_dump("no pid");
669 *-----------------------------------------------------------------------
671 * Put out another command for the given job. If the command starts
672 * with an @ or a - we process it specially. In the former case,
673 * so long as the -s and -n flags weren't given to make, we stick
674 * a shell-specific echoOff command in the script. In the latter,
675 * we ignore errors for the entire job, unless the shell has error
677 * If the command is just "..." we take all future commands for this
678 * job to be commands to be executed once the entire graph has been
679 * made and return non-zero to signal that the end of the commands
680 * was reached. These commands are later attached to the postCommands
681 * node and executed by Job_End when all things are done.
682 * This function is called from JobStart via Lst_ForEach.
685 * cmdp command string to print
686 * jobp job for which to print it
689 * Always 0, unless the command was "..."
692 * If the command begins with a '-' and the shell has no error control,
693 * the JOB_IGNERR flag is set in the job descriptor.
694 * If the command is "..." and we're not ignoring such things,
695 * tailCmds is set to the successor node of the cmd.
696 * numCommands is incremented if the command is actually printed.
697 *-----------------------------------------------------------------------
700 JobPrintCommand(void *cmdp, void *jobp)
702 Boolean noSpecials; /* true if we shouldn't worry about
703 * inserting special commands into
704 * the input stream. */
705 Boolean shutUp = FALSE; /* true if we put a no echo command
706 * into the command file */
707 Boolean errOff = FALSE; /* true if we turned error checking
708 * off before printing the command
709 * and need to turn it back on */
710 const char *cmdTemplate; /* Template to use when printing the
712 char *cmdStart; /* Start of expanded command */
713 char *escCmd = NULL; /* Command with quotes/backticks escaped */
714 char *cmd = (char *)cmdp;
715 Job *job = (Job *)jobp;
717 noSpecials = NoExecute(job->node);
719 if (strcmp(cmd, "...") == 0) {
720 job->node->type |= OP_SAVE_CMDS;
721 if ((job->flags & JOB_IGNDOTS) == 0) {
722 LstNode dotsNode = Lst_FindDatum(job->node->commands, cmd);
723 job->tailCmds = dotsNode != NULL ? LstNode_Next(dotsNode) : NULL;
729 #define DBPRINTF(fmt, arg) if (DEBUG(JOB)) { \
730 (void)fprintf(debug_file, fmt, arg); \
732 (void)fprintf(job->cmdFILE, fmt, arg); \
733 (void)fflush(job->cmdFILE);
737 cmdStart = cmd = Var_Subst(cmd, job->node, VARE_WANTRES);
739 cmdTemplate = "%s\n";
742 * Check for leading @' and -'s to control echoing and error checking.
744 while (*cmd == '@' || *cmd == '-' || (*cmd == '+')) {
747 shutUp = DEBUG(LOUD) ? FALSE : TRUE;
755 * We're not actually executing anything...
756 * but this one needs to be - use compat mode just for it.
758 CompatRunCommand(cmdp, job->node);
767 while (isspace((unsigned char) *cmd))
771 * If the shell doesn't have error control the alternate echo'ing will
772 * be done (to avoid showing additional error checking code)
773 * and this will need the characters '$ ` \ "' escaped
776 if (!commandShell->hasErrCtl) {
779 /* Worst that could happen is every char needs escaping. */
780 escCmd = bmake_malloc((strlen(cmd) * 2) + 1);
781 for (i = 0, j = 0; cmd[i] != '\0'; i++, j++) {
782 if (cmd[i] == '$' || cmd[i] == '`' || cmd[i] == '\\' ||
791 if (!(job->flags & JOB_SILENT) && !noSpecials &&
792 commandShell->hasEchoCtl) {
793 DBPRINTF("%s\n", commandShell->echoOff);
795 if (commandShell->hasErrCtl)
802 if (commandShell->hasErrCtl) {
804 * we don't want the error-control commands showing
805 * up either, so we turn off echoing while executing
806 * them. We could put another field in the shell
807 * structure to tell JobDoOutput to look for this
808 * string too, but why make it any more complex than
811 if (!(job->flags & JOB_SILENT) && !shutUp &&
812 commandShell->hasEchoCtl) {
813 DBPRINTF("%s\n", commandShell->echoOff);
814 DBPRINTF("%s\n", commandShell->ignErr);
815 DBPRINTF("%s\n", commandShell->echoOn);
817 DBPRINTF("%s\n", commandShell->ignErr);
819 } else if (commandShell->ignErr &&
820 (*commandShell->ignErr != '\0'))
823 * The shell has no error control, so we need to be
824 * weird to get it to ignore any errors from the command.
825 * If echoing is turned on, we turn it off and use the
826 * errCheck template to echo the command. Leave echoing
827 * off so the user doesn't see the weirdness we go through
828 * to ignore errors. Set cmdTemplate to use the weirdness
829 * instead of the simple "%s\n" template.
831 job->flags |= JOB_IGNERR;
832 if (!(job->flags & JOB_SILENT) && !shutUp) {
833 if (commandShell->hasEchoCtl) {
834 DBPRINTF("%s\n", commandShell->echoOff);
836 DBPRINTF(commandShell->errCheck, escCmd);
840 DBPRINTF(commandShell->errCheck, escCmd);
843 cmdTemplate = commandShell->ignErr;
845 * The error ignoration (hee hee) is already taken care
846 * of by the ignErr template, so pretend error checking
859 * If errors are being checked and the shell doesn't have error control
860 * but does supply an errOut template, then setup commands to run
864 if (!commandShell->hasErrCtl && commandShell->errOut &&
865 (*commandShell->errOut != '\0')) {
866 if (!(job->flags & JOB_SILENT) && !shutUp) {
867 if (commandShell->hasEchoCtl) {
868 DBPRINTF("%s\n", commandShell->echoOff);
870 DBPRINTF(commandShell->errCheck, escCmd);
873 /* If it's a comment line or blank, treat as an ignored error */
874 if ((escCmd[0] == commandShell->commentChar) ||
876 cmdTemplate = commandShell->ignErr;
878 cmdTemplate = commandShell->errOut;
883 if (DEBUG(SHELL) && strcmp(shellName, "sh") == 0 &&
884 (job->flags & JOB_TRACED) == 0) {
885 DBPRINTF("set -%s\n", "x");
886 job->flags |= JOB_TRACED;
889 DBPRINTF(cmdTemplate, cmd);
894 * If echoing is already off, there's no point in issuing the
895 * echoOff command. Otherwise we issue it and pretend it was on
896 * for the whole command...
898 if (!shutUp && !(job->flags & JOB_SILENT) && commandShell->hasEchoCtl){
899 DBPRINTF("%s\n", commandShell->echoOff);
902 DBPRINTF("%s\n", commandShell->errCheck);
904 if (shutUp && commandShell->hasEchoCtl) {
905 DBPRINTF("%s\n", commandShell->echoOn);
911 *-----------------------------------------------------------------------
913 * Save a command to be executed when everything else is done.
914 * Callback function for JobFinish...
920 * The command is tacked onto the end of postCommands' commands list.
922 *-----------------------------------------------------------------------
925 JobSaveCommand(void *cmd, void *gn)
927 cmd = Var_Subst((char *)cmd, (GNode *)gn, VARE_WANTRES);
928 Lst_Append(postCommands->commands, cmd);
934 *-----------------------------------------------------------------------
936 * Called to close both input and output pipes when a job is finished.
942 * The file descriptors associated with the job are closed.
944 *-----------------------------------------------------------------------
950 (void)close(job->outPipe);
953 JobDoOutput(job, TRUE);
954 (void)close(job->inPipe);
959 *-----------------------------------------------------------------------
961 * Do final processing for the given job including updating
962 * parents and starting new jobs as available/necessary. Note
963 * that we pay no attention to the JOB_IGNERR flag here.
964 * This is because when we're called because of a noexecute flag
965 * or something, jstat.w_status is 0 and when called from
966 * Job_CatchChildren, the status is zeroed if it s/b ignored.
970 * status sub-why job went away
976 * Final commands for the job are placed on postCommands.
978 * If we got an error and are aborting (aborting == ABORT_ERROR) and
979 * the job list is now empty, we are done for the day.
980 * If we recognized an error (errors !=0), we set the aborting flag
981 * to ABORT_ERROR so no more jobs will be started.
982 *-----------------------------------------------------------------------
986 JobFinish (Job *job, WAIT_T status)
988 Boolean done, return_job_token;
991 fprintf(debug_file, "Jobfinish: %d [%s], status %d\n",
992 job->pid, job->node->name, status);
995 if ((WIFEXITED(status) &&
996 (((WEXITSTATUS(status) != 0) && !(job->flags & JOB_IGNERR)))) ||
1000 * If it exited non-zero and either we're doing things our
1001 * way or we're not ignoring errors, the job is finished.
1002 * Similarly, if the shell died because of a signal
1003 * the job is also finished. In these
1004 * cases, finish out the job's output before printing the exit
1008 if (job->cmdFILE != NULL && job->cmdFILE != stdout) {
1009 (void)fclose(job->cmdFILE);
1010 job->cmdFILE = NULL;
1013 } else if (WIFEXITED(status)) {
1015 * Deal with ignored errors in -B mode. We need to print a message
1016 * telling of the ignored error as well as setting status.w_status
1017 * to 0 so the next command gets run. To do this, we set done to be
1018 * TRUE if in -B mode and the job exited non-zero.
1020 done = WEXITSTATUS(status) != 0;
1022 * Old comment said: "Note we don't
1023 * want to close down any of the streams until we know we're at the
1025 * But we do. Otherwise when are we going to print the rest of the
1031 * No need to close things down or anything.
1037 if (WIFEXITED(status)) {
1039 (void)fprintf(debug_file, "Process %d [%s] exited.\n",
1040 job->pid, job->node->name);
1042 if (WEXITSTATUS(status) != 0) {
1043 if (job->node != lastNode) {
1044 MESSAGE(stdout, job->node);
1045 lastNode = job->node;
1049 meta_job_error(job, job->node, job->flags, WEXITSTATUS(status));
1052 if (!dieQuietly(job->node, -1))
1053 (void)printf("*** [%s] Error code %d%s\n",
1055 WEXITSTATUS(status),
1056 (job->flags & JOB_IGNERR) ? " (ignored)" : "");
1057 if (job->flags & JOB_IGNERR) {
1058 WAIT_STATUS(status) = 0;
1060 if (deleteOnError) {
1061 JobDeleteTarget(job->node);
1063 PrintOnError(job->node, NULL);
1065 } else if (DEBUG(JOB)) {
1066 if (job->node != lastNode) {
1067 MESSAGE(stdout, job->node);
1068 lastNode = job->node;
1070 (void)printf("*** [%s] Completed successfully\n",
1074 if (job->node != lastNode) {
1075 MESSAGE(stdout, job->node);
1076 lastNode = job->node;
1078 (void)printf("*** [%s] Signal %d\n",
1079 job->node->name, WTERMSIG(status));
1080 if (deleteOnError) {
1081 JobDeleteTarget(job->node);
1084 (void)fflush(stdout);
1091 if ((x = meta_job_finish(job)) != 0 && status == 0) {
1097 return_job_token = FALSE;
1099 Trace_Log(JOBEND, job);
1100 if (!(job->flags & JOB_SPECIAL)) {
1101 if ((WAIT_STATUS(status) != 0) ||
1102 (aborting == ABORT_ERROR) ||
1103 (aborting == ABORT_INTERRUPT))
1104 return_job_token = TRUE;
1107 if ((aborting != ABORT_ERROR) && (aborting != ABORT_INTERRUPT) &&
1108 (WAIT_STATUS(status) == 0)) {
1110 * As long as we aren't aborting and the job didn't return a non-zero
1111 * status that we shouldn't ignore, we call Make_Update to update
1112 * the parents. In addition, any saved commands for the node are placed
1113 * on the .END target.
1115 if (job->tailCmds != NULL) {
1116 Lst_ForEachFrom(job->node->commands, job->tailCmds,
1120 job->node->made = MADE;
1121 if (!(job->flags & JOB_SPECIAL))
1122 return_job_token = TRUE;
1123 Make_Update(job->node);
1124 job->job_state = JOB_ST_FREE;
1125 } else if (WAIT_STATUS(status)) {
1127 job->job_state = JOB_ST_FREE;
1131 * Set aborting if any error.
1133 if (errors && !keepgoing && (aborting != ABORT_INTERRUPT)) {
1135 * If we found any errors in this batch of children and the -k flag
1136 * wasn't given, we set the aborting flag so no more jobs get
1139 aborting = ABORT_ERROR;
1142 if (return_job_token)
1145 if (aborting == ABORT_ERROR && jobTokensRunning == 0) {
1147 * If we are aborting and the job table is now empty, we finish.
1154 *-----------------------------------------------------------------------
1156 * Touch the given target. Called by JobStart when the -t flag was
1160 * gn the node of the file to touch
1161 * silent TRUE if should not print message
1167 * The data modification of the file is changed. In addition, if the
1168 * file did not exist, it is created.
1169 *-----------------------------------------------------------------------
1172 Job_Touch(GNode *gn, Boolean silent)
1174 int streamID; /* ID of stream opened to do the touch */
1175 struct utimbuf times; /* Times for utime() call */
1177 if (gn->type & (OP_JOIN|OP_USE|OP_USEBEFORE|OP_EXEC|OP_OPTIONAL|
1178 OP_SPECIAL|OP_PHONY)) {
1180 * .JOIN, .USE, .ZEROTIME and .OPTIONAL targets are "virtual" targets
1181 * and, as such, shouldn't really be created.
1186 if (!silent || NoExecute(gn)) {
1187 (void)fprintf(stdout, "touch %s\n", gn->name);
1188 (void)fflush(stdout);
1191 if (NoExecute(gn)) {
1195 if (gn->type & OP_ARCHV) {
1197 } else if (gn->type & OP_LIB) {
1200 char *file = gn->path ? gn->path : gn->name;
1202 times.actime = times.modtime = now;
1203 if (utime(file, ×) < 0){
1204 streamID = open(file, O_RDWR | O_CREAT, 0666);
1206 if (streamID >= 0) {
1210 * Read and write a byte to the file to change the
1211 * modification time, then close the file.
1213 if (read(streamID, &c, 1) == 1) {
1214 (void)lseek(streamID, (off_t)0, SEEK_SET);
1215 while (write(streamID, &c, 1) == -1 && errno == EAGAIN)
1219 (void)close(streamID);
1221 (void)fprintf(stdout, "*** couldn't touch %s: %s",
1222 file, strerror(errno));
1223 (void)fflush(stdout);
1230 *-----------------------------------------------------------------------
1231 * Job_CheckCommands --
1232 * Make sure the given node has all the commands it needs.
1235 * gn The target whose commands need verifying
1236 * abortProc Function to abort with message
1239 * TRUE if the commands list is/was ok.
1242 * The node will have commands from the .DEFAULT rule added to it
1244 *-----------------------------------------------------------------------
1247 Job_CheckCommands(GNode *gn, void (*abortProc)(const char *, ...))
1249 if (OP_NOP(gn->type) && Lst_IsEmpty(gn->commands) &&
1250 ((gn->type & OP_LIB) == 0 || Lst_IsEmpty(gn->children))) {
1252 * No commands. Look for .DEFAULT rule from which we might infer
1255 if ((DEFAULT != NULL) && !Lst_IsEmpty(DEFAULT->commands) &&
1256 (gn->type & OP_SPECIAL) == 0) {
1259 * Make only looks for a .DEFAULT if the node was never the
1260 * target of an operator, so that's what we do too. If
1261 * a .DEFAULT was given, we substitute its commands for gn's
1262 * commands and set the IMPSRC variable to be the target's name
1263 * The DEFAULT node acts like a transformation rule, in that
1264 * gn also inherits any attributes or sources attached to
1267 Make_HandleUse(DEFAULT, gn);
1268 Var_Set(IMPSRC, Var_Value(TARGET, gn, &p1), gn);
1270 } else if (Dir_MTime(gn, 0) == 0 && (gn->type & OP_SPECIAL) == 0) {
1272 * The node wasn't the target of an operator we have no .DEFAULT
1273 * rule to go on and the target doesn't already exist. There's
1274 * nothing more we can do for this branch. If the -k flag wasn't
1275 * given, we stop in our tracks, otherwise we just don't update
1276 * this node's parents so they never get examined.
1278 static const char msg[] = ": don't know how to make";
1280 if (gn->flags & FROM_DEPEND) {
1281 if (!Job_RunTarget(".STALE", gn->fname))
1282 fprintf(stdout, "%s: %s, %d: ignoring stale %s for %s\n",
1283 progname, gn->fname, gn->lineno, makeDependfile,
1288 if (gn->type & OP_OPTIONAL) {
1289 (void)fprintf(stdout, "%s%s %s (ignored)\n", progname,
1291 (void)fflush(stdout);
1292 } else if (keepgoing) {
1293 (void)fprintf(stdout, "%s%s %s (continuing)\n", progname,
1295 (void)fflush(stdout);
1298 (*abortProc)("%s%s %s. Stop", progname, msg, gn->name);
1307 *-----------------------------------------------------------------------
1309 * Execute the shell for the given job. Called from JobStart
1312 * job Job to execute
1318 * A shell is executed, outputs is altered and the Job structure added
1321 *-----------------------------------------------------------------------
1324 JobExec(Job *job, char **argv)
1326 int cpid; /* ID of new child */
1329 job->flags &= ~JOB_TRACED;
1334 (void)fprintf(debug_file, "Running %s %sly\n", job->node->name, "local");
1335 (void)fprintf(debug_file, "\tCommand: ");
1336 for (i = 0; argv[i] != NULL; i++) {
1337 (void)fprintf(debug_file, "%s ", argv[i]);
1339 (void)fprintf(debug_file, "\n");
1343 * Some jobs produce no output and it's disconcerting to have
1344 * no feedback of their running (since they produce no output, the
1345 * banner with their name in it never appears). This is an attempt to
1346 * provide that feedback, even if nothing follows it.
1348 if ((lastNode != job->node) && !(job->flags & JOB_SILENT)) {
1349 MESSAGE(stdout, job->node);
1350 lastNode = job->node;
1353 /* No interruptions until this job is on the `jobs' list */
1356 /* Pre-emptively mark job running, pid still zero though */
1357 job->job_state = JOB_ST_RUNNING;
1361 Punt("Cannot vfork: %s", strerror(errno));
1369 meta_job_child(job);
1373 * Reset all signal handlers; this is necessary because we also
1374 * need to unblock signals before we exec(2).
1378 /* Now unblock signals */
1379 sigemptyset(&tmask);
1380 JobSigUnlock(&tmask);
1383 * Must duplicate the input stream down to the child's input and
1384 * reset it to the beginning (again). Since the stream was marked
1385 * close-on-exec, we must clear that bit in the new input.
1387 if (dup2(FILENO(job->cmdFILE), 0) == -1) {
1388 execError("dup2", "job->cmdFILE");
1391 if (fcntl(0, F_SETFD, 0) == -1) {
1392 execError("fcntl clear close-on-exec", "stdin");
1395 if (lseek(0, (off_t)0, SEEK_SET) == -1) {
1396 execError("lseek to 0", "stdin");
1400 if (job->node->type & (OP_MAKE | OP_SUBMAKE)) {
1402 * Pass job token pipe to submakes.
1404 if (fcntl(tokenWaitJob.inPipe, F_SETFD, 0) == -1) {
1405 execError("clear close-on-exec", "tokenWaitJob.inPipe");
1408 if (fcntl(tokenWaitJob.outPipe, F_SETFD, 0) == -1) {
1409 execError("clear close-on-exec", "tokenWaitJob.outPipe");
1415 * Set up the child's output to be routed through the pipe
1416 * we've created for it.
1418 if (dup2(job->outPipe, 1) == -1) {
1419 execError("dup2", "job->outPipe");
1423 * The output channels are marked close on exec. This bit was
1424 * duplicated by the dup2(on some systems), so we have to clear
1425 * it before routing the shell's error output to the same place as
1426 * its standard output.
1428 if (fcntl(1, F_SETFD, 0) == -1) {
1429 execError("clear close-on-exec", "stdout");
1432 if (dup2(1, 2) == -1) {
1433 execError("dup2", "1, 2");
1438 * We want to switch the child into a different process family so
1439 * we can kill it and all its descendants in one fell swoop,
1440 * by killing its process family, but not commit suicide.
1442 #if defined(HAVE_SETPGID)
1443 (void)setpgid(0, getpid());
1445 #if defined(HAVE_SETSID)
1446 /* XXX: dsl - I'm sure this should be setpgrp()... */
1449 (void)setpgrp(0, getpid());
1455 (void)execv(shellPath, argv);
1456 execError("exec", shellPath);
1460 /* Parent, continuing after the child exec */
1463 Trace_Log(JOBSTART, job);
1467 meta_job_parent(job, cpid);
1472 * Set the current position in the buffer to the beginning
1473 * and mark another stream to watch in the outputs mask
1479 if (job->cmdFILE != NULL && job->cmdFILE != stdout) {
1480 (void)fclose(job->cmdFILE);
1481 job->cmdFILE = NULL;
1485 * Now the job is actually running, add it to the table.
1488 fprintf(debug_file, "JobExec(%s): pid %d added to jobs table\n",
1489 job->node->name, job->pid);
1490 job_table_dump("job started");
1492 JobSigUnlock(&mask);
1496 *-----------------------------------------------------------------------
1498 * Create the argv needed to execute the shell for a given job.
1505 *-----------------------------------------------------------------------
1508 JobMakeArgv(Job *job, char **argv)
1511 static char args[10]; /* For merged arguments */
1513 argv[0] = UNCONST(shellName);
1516 if ((commandShell->exit && (*commandShell->exit != '-')) ||
1517 (commandShell->echo && (*commandShell->echo != '-')))
1520 * At least one of the flags doesn't have a minus before it, so
1521 * merge them together. Have to do this because the *(&(@*#*&#$#
1522 * Bourne shell thinks its second argument is a file to source.
1523 * Grrrr. Note the ten-character limitation on the combined arguments.
1525 (void)snprintf(args, sizeof(args), "-%s%s",
1526 ((job->flags & JOB_IGNERR) ? "" :
1527 (commandShell->exit ? commandShell->exit : "")),
1528 ((job->flags & JOB_SILENT) ? "" :
1529 (commandShell->echo ? commandShell->echo : "")));
1536 if (!(job->flags & JOB_IGNERR) && commandShell->exit) {
1537 argv[argc] = UNCONST(commandShell->exit);
1540 if (!(job->flags & JOB_SILENT) && commandShell->echo) {
1541 argv[argc] = UNCONST(commandShell->echo);
1549 *-----------------------------------------------------------------------
1551 * Start a target-creation process going for the target described
1552 * by the graph node gn.
1555 * gn target to create
1556 * flags flags for the job to override normal ones.
1557 * e.g. JOB_SPECIAL or JOB_IGNDOTS
1558 * previous The previous Job structure for this node, if any.
1561 * JOB_ERROR if there was an error in the commands, JOB_FINISHED
1562 * if there isn't actually anything left to do for the job and
1563 * JOB_RUNNING if the job has been started.
1566 * A new Job node is created and added to the list of running
1567 * jobs. PMake is forked and a child shell created.
1569 * NB: I'm fairly sure that this code is never called with JOB_SPECIAL set
1570 * JOB_IGNDOTS is never set (dsl)
1571 * Also the return value is ignored by everyone.
1572 *-----------------------------------------------------------------------
1575 JobStart(GNode *gn, int flags)
1577 Job *job; /* new job descriptor */
1578 char *argv[10]; /* Argument vector to shell */
1579 Boolean cmdsOK; /* true if the nodes commands were all right */
1580 Boolean noExec; /* Set true if we decide not to run the job */
1581 int tfd; /* File descriptor to the temp file */
1583 for (job = job_table; job < job_table_end; job++) {
1584 if (job->job_state == JOB_ST_FREE)
1587 if (job >= job_table_end)
1588 Punt("JobStart no job slots vacant");
1590 memset(job, 0, sizeof *job);
1591 job->job_state = JOB_ST_SETUP;
1592 if (gn->type & OP_SPECIAL)
1593 flags |= JOB_SPECIAL;
1596 job->tailCmds = NULL;
1599 * Set the initial value of the flags for this job based on the global
1600 * ones and the node's attributes... Any flags supplied by the caller
1601 * are also added to the field.
1604 if (Targ_Ignore(gn)) {
1605 job->flags |= JOB_IGNERR;
1607 if (Targ_Silent(gn)) {
1608 job->flags |= JOB_SILENT;
1610 job->flags |= flags;
1613 * Check the commands now so any attributes from .DEFAULT have a chance
1614 * to migrate to the node
1616 cmdsOK = Job_CheckCommands(gn, Error);
1618 job->inPollfd = NULL;
1620 * If the -n flag wasn't given, we open up OUR (not the child's)
1621 * temporary file to stuff commands in it. The thing is rd/wr so we don't
1622 * need to reopen it to feed it to the shell. If the -n flag *was* given,
1623 * we just set the file to be stdout. Cute, huh?
1625 if (((gn->type & OP_MAKE) && !(noRecursiveExecute)) ||
1626 (!noExecute && !touchFlag)) {
1628 * tfile is the name of a file into which all shell commands are
1629 * put. It is removed before the child shell is executed, unless
1630 * DEBUG(SCRIPT) is set.
1635 * We're serious here, but if the commands were bogus, we're
1639 PrintOnError(gn, NULL); /* provide some clue */
1644 tfd = mkTempFile(TMPPAT, &tfile);
1646 (void)eunlink(tfile);
1647 JobSigUnlock(&mask);
1649 job->cmdFILE = fdopen(tfd, "w+");
1650 if (job->cmdFILE == NULL) {
1651 Punt("Could not fdopen %s", tfile);
1653 (void)fcntl(FILENO(job->cmdFILE), F_SETFD, FD_CLOEXEC);
1655 * Send the commands to the command file, flush all its buffers then
1656 * rewind and remove the thing.
1662 meta_job_start(job, gn);
1663 if (Targ_Silent(gn)) { /* might have changed */
1664 job->flags |= JOB_SILENT;
1669 * We can do all the commands at once. hooray for sanity
1672 Lst_ForEach(gn->commands, JobPrintCommand, job);
1675 * If we didn't print out any commands to the shell script,
1676 * there's not much point in executing the shell, is there?
1678 if (numCommands == 0) {
1683 } else if (NoExecute(gn)) {
1685 * Not executing anything -- just print all the commands to stdout
1686 * in one fell swoop. This will still set up job->tailCmds correctly.
1688 if (lastNode != gn) {
1689 MESSAGE(stdout, gn);
1692 job->cmdFILE = stdout;
1694 * Only print the commands if they're ok, but don't die if they're
1695 * not -- just let the user know they're bad and keep going. It
1696 * doesn't do any harm in this case and may do some good.
1699 Lst_ForEach(gn->commands, JobPrintCommand, job);
1702 * Don't execute the shell, thank you.
1707 * Just touch the target and note that no shell should be executed.
1708 * Set cmdFILE to stdout to make life easier. Check the commands, too,
1709 * but don't die if they're no good -- it does no harm to keep working
1712 job->cmdFILE = stdout;
1713 Job_Touch(gn, job->flags&JOB_SILENT);
1716 /* Just in case it isn't already... */
1717 (void)fflush(job->cmdFILE);
1720 * If we're not supposed to execute a shell, don't.
1723 if (!(job->flags & JOB_SPECIAL))
1726 * Unlink and close the command file if we opened one
1728 if (job->cmdFILE != stdout) {
1729 if (job->cmdFILE != NULL) {
1730 (void)fclose(job->cmdFILE);
1731 job->cmdFILE = NULL;
1736 * We only want to work our way up the graph if we aren't here because
1737 * the commands for the job were no good.
1739 if (cmdsOK && aborting == 0) {
1740 if (job->tailCmds != NULL) {
1741 Lst_ForEachFrom(job->node->commands, job->tailCmds,
1745 job->node->made = MADE;
1746 Make_Update(job->node);
1748 job->job_state = JOB_ST_FREE;
1749 return cmdsOK ? JOB_FINISHED : JOB_ERROR;
1753 * Set up the control arguments to the shell. This is based on the flags
1754 * set earlier for this job.
1756 JobMakeArgv(job, argv);
1758 /* Create the pipe by which we'll get the shell's output. */
1759 JobCreatePipe(job, 3);
1766 JobOutput(Job *job, char *cp, char *endp, int msg)
1770 if (commandShell->noPrint) {
1771 ecp = Str_FindSubstring(cp, commandShell->noPrint);
1772 while (ecp != NULL) {
1775 if (!beSilent && msg && job->node != lastNode) {
1776 MESSAGE(stdout, job->node);
1777 lastNode = job->node;
1780 * The only way there wouldn't be a newline after
1781 * this line is if it were the last in the buffer.
1782 * however, since the non-printable comes after it,
1783 * there must be a newline, so we don't print one.
1785 (void)fprintf(stdout, "%s", cp);
1786 (void)fflush(stdout);
1788 cp = ecp + commandShell->noPLen;
1791 * Still more to print, look again after skipping
1792 * the whitespace following the non-printable
1796 while (*cp == ' ' || *cp == '\t' || *cp == '\n') {
1799 ecp = Str_FindSubstring(cp, commandShell->noPrint);
1809 *-----------------------------------------------------------------------
1811 * This function is called at different times depending on
1812 * whether the user has specified that output is to be collected
1813 * via pipes or temporary files. In the former case, we are called
1814 * whenever there is something to read on the pipe. We collect more
1815 * output from the given job and store it in the job's outBuf. If
1816 * this makes up a line, we print it tagged by the job's identifier,
1818 * If output has been collected in a temporary file, we open the
1819 * file and read it line by line, transfering it to our own
1820 * output channel until the file is empty. At which point we
1821 * remove the temporary file.
1822 * In both cases, however, we keep our figurative eye out for the
1823 * 'noPrint' line for the shell from which the output came. If
1824 * we recognize a line, we don't print it. If the command is not
1825 * alone on the line (the character after it is not \0 or \n), we
1826 * do print whatever follows it.
1829 * job the job whose output needs printing
1830 * finish TRUE if this is the last time we'll be called
1837 * curPos may be shifted as may the contents of outBuf.
1838 *-----------------------------------------------------------------------
1841 JobDoOutput(Job *job, Boolean finish)
1843 Boolean gotNL = FALSE; /* true if got a newline */
1844 Boolean fbuf; /* true if our buffer filled up */
1845 int nr; /* number of bytes read */
1846 int i; /* auxiliary index into outBuf */
1847 int max; /* limit for i (end of current data) */
1848 int nRead; /* (Temporary) number of bytes read */
1851 * Read as many bytes as will fit in the buffer.
1857 nRead = read(job->inPipe, &job->outBuf[job->curPos],
1858 JOB_BUFSIZE - job->curPos);
1860 if (errno == EAGAIN)
1863 perror("JobDoOutput(piperead)");
1871 * If we hit the end-of-file (the job is dead), we must flush its
1872 * remaining output, so pretend we read a newline if there's any
1873 * output remaining in the buffer.
1874 * Also clear the 'finish' flag so we stop looping.
1876 if ((nr == 0) && (job->curPos != 0)) {
1877 job->outBuf[job->curPos] = '\n';
1880 } else if (nr == 0) {
1885 * Look for the last newline in the bytes we just got. If there is
1886 * one, break out of the loop with 'i' as its index and gotNL set
1889 max = job->curPos + nr;
1890 for (i = job->curPos + nr - 1; i >= job->curPos; i--) {
1891 if (job->outBuf[i] == '\n') {
1894 } else if (job->outBuf[i] == '\0') {
1898 job->outBuf[i] = ' ';
1904 if (job->curPos == JOB_BUFSIZE) {
1906 * If we've run out of buffer space, we have no choice
1907 * but to print the stuff. sigh.
1913 if (gotNL || fbuf) {
1915 * Need to send the output to the screen. Null terminate it
1916 * first, overwriting the newline character if there was one.
1917 * So long as the line isn't one we should filter (according
1918 * to the shell description), we print the line, preceded
1919 * by a target banner if this target isn't the same as the
1920 * one for which we last printed something.
1921 * The rest of the data in the buffer are then shifted down
1922 * to the start of the buffer and curPos is set accordingly.
1924 job->outBuf[i] = '\0';
1925 if (i >= job->curPos) {
1928 cp = JobOutput(job, job->outBuf, &job->outBuf[i], FALSE);
1931 * There's still more in that thar buffer. This time, though,
1932 * we know there's no newline at the end, so we add one of
1933 * our own free will.
1936 if (!beSilent && job->node != lastNode) {
1937 MESSAGE(stdout, job->node);
1938 lastNode = job->node;
1942 meta_job_output(job, cp, gotNL ? "\n" : "");
1945 (void)fprintf(stdout, "%s%s", cp, gotNL ? "\n" : "");
1946 (void)fflush(stdout);
1950 * max is the last offset still in the buffer. Move any remaining
1951 * characters to the start of the buffer and update the end marker
1955 (void)memmove(job->outBuf, &job->outBuf[i + 1], max - (i + 1));
1956 job->curPos = max - (i + 1);
1964 * If the finish flag is true, we must loop until we hit
1965 * end-of-file on the pipe. This is guaranteed to happen
1966 * eventually since the other end of the pipe is now closed
1967 * (we closed it explicitly and the child has exited). When
1968 * we do get an EOF, finish will be set FALSE and we'll fall
1980 * Unfortunately it is too complicated to run .BEGIN, .END,
1981 * and .INTERRUPT job in the parallel job module. This has
1982 * the nice side effect that it avoids a lot of other problems.
1984 Lst lst = Lst_Init();
1985 Lst_Append(lst, targ);
1986 (void)Make_Run(lst);
1987 Lst_Destroy(lst, NULL);
1988 JobStart(targ, JOB_SPECIAL);
1989 while (jobTokensRunning) {
1993 Compat_Make(targ, targ);
1994 if (targ->made == ERROR) {
1995 PrintOnError(targ, "\n\nStop.");
2002 *-----------------------------------------------------------------------
2003 * Job_CatchChildren --
2004 * Handle the exit of a child. Called from Make_Make.
2007 * block TRUE if should block on the wait
2013 * The job descriptor is removed from the list of children.
2016 * We do waits, blocking or not, according to the wisdom of our
2017 * caller, until there are no more children to report. For each
2018 * job, call JobFinish to finish things off.
2020 *-----------------------------------------------------------------------
2024 Job_CatchChildren(void)
2026 int pid; /* pid of dead child */
2027 WAIT_T status; /* Exit/termination status */
2030 * Don't even bother if we know there's no one around.
2032 if (jobTokensRunning == 0)
2035 while ((pid = waitpid((pid_t) -1, &status, WNOHANG | WUNTRACED)) > 0) {
2037 (void)fprintf(debug_file, "Process %d exited/stopped status %x.\n", pid,
2038 WAIT_STATUS(status));
2040 JobReapChild(pid, status, TRUE);
2045 * It is possible that wait[pid]() was called from elsewhere,
2046 * this lets us reap jobs regardless.
2049 JobReapChild(pid_t pid, WAIT_T status, Boolean isJobs)
2051 Job *job; /* job descriptor for dead child */
2054 * Don't even bother if we know there's no one around.
2056 if (jobTokensRunning == 0)
2059 job = JobFindPid(pid, JOB_ST_RUNNING, isJobs);
2062 if (!lurking_children)
2063 Error("Child (%d) status %x not in table?", pid, status);
2065 return; /* not ours */
2067 if (WIFSTOPPED(status)) {
2069 (void)fprintf(debug_file, "Process %d (%s) stopped.\n",
2070 job->pid, job->node->name);
2072 if (!make_suspended) {
2073 switch (WSTOPSIG(status)) {
2075 (void)printf("*** [%s] Suspended\n", job->node->name);
2078 (void)printf("*** [%s] Stopped\n", job->node->name);
2081 (void)printf("*** [%s] Stopped -- signal %d\n",
2082 job->node->name, WSTOPSIG(status));
2084 job->job_suspended = 1;
2086 (void)fflush(stdout);
2090 job->job_state = JOB_ST_FINISHED;
2091 job->exit_status = WAIT_STATUS(status);
2093 JobFinish(job, status);
2097 *-----------------------------------------------------------------------
2098 * Job_CatchOutput --
2099 * Catch the output from our children, if we're using
2100 * pipes do so. Otherwise just block time until we get a
2101 * signal(most likely a SIGCHLD) since there's no point in
2102 * just spinning when there's nothing to do and the reaping
2103 * of a child can wait for a while.
2109 * Output is read from pipes if we're piping.
2110 * -----------------------------------------------------------------------
2113 Job_CatchOutput(void)
2119 (void)fflush(stdout);
2121 /* The first fd in the list is the job token pipe */
2123 nready = poll(fds + 1 - wantToken, nfds - 1 + wantToken, POLL_MSEC);
2124 } while (nready < 0 && errno == EINTR);
2127 Punt("poll: %s", strerror(errno));
2129 if (nready > 0 && readyfd(&childExitJob)) {
2132 count = read(childExitJob.inPipe, &token, 1);
2135 Punt("unexpected eof on token pipe");
2137 Punt("token pipe read: %s", strerror(errno));
2139 if (token == DO_JOB_RESUME[0])
2140 /* Complete relay requested from our SIGCONT handler */
2149 Job_CatchChildren();
2153 for (i = npseudojobs*nfds_per_job(); i < nfds; i++) {
2154 if (!fds[i].revents)
2157 if (job->job_state == JOB_ST_RUNNING)
2158 JobDoOutput(job, FALSE);
2159 #if defined(USE_FILEMON) && !defined(USE_FILEMON_DEV)
2161 * With meta mode, we may have activity on the job's filemon
2162 * descriptor too, which at the moment is any pollfd other than
2165 if (useMeta && job->inPollfd != &fds[i]) {
2166 if (meta_job_event(job) <= 0) {
2167 fds[i].events = 0; /* never mind */
2177 *-----------------------------------------------------------------------
2179 * Start the creation of a target. Basically a front-end for
2180 * JobStart used by the Make module.
2186 * Another job is started.
2188 *-----------------------------------------------------------------------
2193 (void)JobStart(gn, 0);
2199 if (shellPath == NULL) {
2201 * We are using the default shell, which may be an absolute
2202 * path if DEFSHELL_CUSTOM is defined.
2204 shellName = commandShell->name;
2205 #ifdef DEFSHELL_CUSTOM
2206 if (*shellName == '/') {
2207 shellPath = shellName;
2208 shellName = strrchr(shellPath, '/');
2212 shellPath = str_concat3(_PATH_DEFSHELLDIR, "/", shellName);
2214 Var_Set_with_flags(".SHELL", shellPath, VAR_CMD, VAR_SET_READONLY);
2215 if (commandShell->exit == NULL) {
2216 commandShell->exit = "";
2218 if (commandShell->echo == NULL) {
2219 commandShell->echo = "";
2221 if (commandShell->hasErrCtl && *commandShell->exit) {
2223 strcmp(commandShell->exit, &shellErrFlag[1]) != 0) {
2225 shellErrFlag = NULL;
2227 if (!shellErrFlag) {
2228 int n = strlen(commandShell->exit) + 2;
2230 shellErrFlag = bmake_malloc(n);
2232 snprintf(shellErrFlag, n, "-%s", commandShell->exit);
2235 } else if (shellErrFlag) {
2237 shellErrFlag = NULL;
2242 * Returns the string literal that is used in the current command shell
2243 * to produce a newline character.
2246 Shell_GetNewline(void)
2248 return commandShell->newline;
2256 } else if (!Var_Exists(MAKE_JOB_PREFIX, VAR_GLOBAL)) {
2257 Var_Set(MAKE_JOB_PREFIX, "---", VAR_GLOBAL);
2260 targPrefix = Var_Subst("${" MAKE_JOB_PREFIX "}",
2261 VAR_GLOBAL, VARE_WANTRES);
2264 /* Initialize the process module. */
2269 /* Allocate space for all the job info */
2270 job_table = bmake_malloc(maxJobs * sizeof *job_table);
2271 memset(job_table, 0, maxJobs * sizeof *job_table);
2272 job_table_end = job_table + maxJobs;
2281 * There is a non-zero chance that we already have children.
2282 * eg after 'make -f- <<EOF'
2283 * Since their termination causes a 'Child (pid) not in table' message,
2284 * Collect the status of any that are already dead, and suppress the
2285 * error message if there are any undead ones.
2289 rval = waitpid((pid_t) -1, &status, WNOHANG);
2293 lurking_children = 1;
2299 JobCreatePipe(&childExitJob, 3);
2301 /* Preallocate enough for the maximum number of jobs. */
2302 fds = bmake_malloc(sizeof(*fds) *
2303 (npseudojobs + maxJobs) * nfds_per_job());
2304 jobfds = bmake_malloc(sizeof(*jobfds) *
2305 (npseudojobs + maxJobs) * nfds_per_job());
2307 /* These are permanent entries and take slots 0 and 1 */
2308 watchfd(&tokenWaitJob);
2309 watchfd(&childExitJob);
2311 sigemptyset(&caught_signals);
2313 * Install a SIGCHLD handler.
2315 (void)bmake_signal(SIGCHLD, JobChildSig);
2316 sigaddset(&caught_signals, SIGCHLD);
2318 #define ADDSIG(s,h) \
2319 if (bmake_signal(s, SIG_IGN) != SIG_IGN) { \
2320 sigaddset(&caught_signals, s); \
2321 (void)bmake_signal(s, h); \
2325 * Catch the four signals that POSIX specifies if they aren't ignored.
2326 * JobPassSig will take care of calling JobInterrupt if appropriate.
2328 ADDSIG(SIGINT, JobPassSig_int)
2329 ADDSIG(SIGHUP, JobPassSig_term)
2330 ADDSIG(SIGTERM, JobPassSig_term)
2331 ADDSIG(SIGQUIT, JobPassSig_term)
2334 * There are additional signals that need to be caught and passed if
2335 * either the export system wants to be told directly of signals or if
2336 * we're giving each job its own process group (since then it won't get
2337 * signals from the terminal driver as we own the terminal)
2339 ADDSIG(SIGTSTP, JobPassSig_suspend)
2340 ADDSIG(SIGTTOU, JobPassSig_suspend)
2341 ADDSIG(SIGTTIN, JobPassSig_suspend)
2342 ADDSIG(SIGWINCH, JobCondPassSig)
2343 ADDSIG(SIGCONT, JobContinueSig)
2346 (void)Job_RunTarget(".BEGIN", NULL);
2347 postCommands = Targ_FindNode(".END", TARG_CREATE);
2350 static void JobSigReset(void)
2353 if (sigismember(&caught_signals, s)) { \
2354 (void)bmake_signal(s, SIG_DFL); \
2367 (void)bmake_signal(SIGCHLD, SIG_DFL);
2370 /* Find a shell in 'shells' given its name, or return NULL. */
2372 JobMatchShell(const char *name)
2376 for (sh = shells; sh->name != NULL; sh++) {
2377 if (strcmp(name, sh->name) == 0)
2384 *-----------------------------------------------------------------------
2386 * Parse a shell specification and set up commandShell, shellPath
2387 * and shellName appropriately.
2390 * line The shell spec
2393 * FALSE if the specification was incorrect.
2396 * commandShell points to a Shell structure (either predefined or
2397 * created from the shell spec), shellPath is the full path of the
2398 * shell described by commandShell, while shellName is just the
2399 * final component of shellPath.
2402 * A shell specification consists of a .SHELL target, with dependency
2403 * operator, followed by a series of blank-separated words. Double
2404 * quotes can be used to use blanks in words. A backslash escapes
2405 * anything (most notably a double-quote and a space) and
2406 * provides the functionality it does in C. Each word consists of
2407 * keyword and value separated by an equal sign. There should be no
2408 * unnecessary spaces in the word. The keywords are as follows:
2409 * name Name of shell.
2410 * path Location of shell.
2411 * quiet Command to turn off echoing.
2412 * echo Command to turn echoing on
2413 * filter Result of turning off echoing that shouldn't be
2415 * echoFlag Flag to turn echoing on at the start
2416 * errFlag Flag to turn error checking on at the start
2417 * hasErrCtl True if shell has error checking control
2418 * newline String literal to represent a newline char
2419 * check Command to turn on error checking if hasErrCtl
2420 * is TRUE or template of command to echo a command
2421 * for which error checking is off if hasErrCtl is
2423 * ignore Command to turn off error checking if hasErrCtl
2424 * is TRUE or template of command to execute a
2425 * command so as to ignore any errors it returns if
2426 * hasErrCtl is FALSE.
2428 *-----------------------------------------------------------------------
2431 Job_ParseShell(char *line)
2439 Boolean fullSpec = FALSE;
2442 while (isspace((unsigned char)*line)) {
2448 memset(&newShell, 0, sizeof(newShell));
2451 * Parse the specification by keyword
2453 wordsList = Str_Words(line, TRUE);
2454 words = wordsList.words;
2455 argc = wordsList.len;
2456 path = wordsList.freeIt;
2457 if (words == NULL) {
2458 Error("Unterminated quoted string [%s]", line);
2463 for (path = NULL, argv = words; argc != 0; argc--, argv++) {
2464 if (strncmp(*argv, "path=", 5) == 0) {
2466 } else if (strncmp(*argv, "name=", 5) == 0) {
2467 newShell.name = &argv[0][5];
2469 if (strncmp(*argv, "quiet=", 6) == 0) {
2470 newShell.echoOff = &argv[0][6];
2471 } else if (strncmp(*argv, "echo=", 5) == 0) {
2472 newShell.echoOn = &argv[0][5];
2473 } else if (strncmp(*argv, "filter=", 7) == 0) {
2474 newShell.noPrint = &argv[0][7];
2475 newShell.noPLen = strlen(newShell.noPrint);
2476 } else if (strncmp(*argv, "echoFlag=", 9) == 0) {
2477 newShell.echo = &argv[0][9];
2478 } else if (strncmp(*argv, "errFlag=", 8) == 0) {
2479 newShell.exit = &argv[0][8];
2480 } else if (strncmp(*argv, "hasErrCtl=", 10) == 0) {
2481 char c = argv[0][10];
2482 newShell.hasErrCtl = !((c != 'Y') && (c != 'y') &&
2483 (c != 'T') && (c != 't'));
2484 } else if (strncmp(*argv, "newline=", 8) == 0) {
2485 newShell.newline = &argv[0][8];
2486 } else if (strncmp(*argv, "check=", 6) == 0) {
2487 newShell.errCheck = &argv[0][6];
2488 } else if (strncmp(*argv, "ignore=", 7) == 0) {
2489 newShell.ignErr = &argv[0][7];
2490 } else if (strncmp(*argv, "errout=", 7) == 0) {
2491 newShell.errOut = &argv[0][7];
2492 } else if (strncmp(*argv, "comment=", 8) == 0) {
2493 newShell.commentChar = argv[0][8];
2495 Parse_Error(PARSE_FATAL, "Unknown keyword \"%s\"",
2506 * If no path was given, the user wants one of the pre-defined shells,
2507 * yes? So we find the one s/he wants with the help of JobMatchShell
2508 * and set things up the right way. shellPath will be set up by
2511 if (newShell.name == NULL) {
2512 Parse_Error(PARSE_FATAL, "Neither path nor name specified");
2516 if ((sh = JobMatchShell(newShell.name)) == NULL) {
2517 Parse_Error(PARSE_WARNING, "%s: No matching shell",
2523 shellName = newShell.name;
2525 /* Shell_Init has already been called! Do it again. */
2526 free(UNCONST(shellPath));
2533 * The user provided a path. If s/he gave nothing else (fullSpec is
2534 * FALSE), try and find a matching shell in the ones we know of.
2535 * Else we just take the specification at its word and copy it
2536 * to a new location. In either case, we need to record the
2537 * path the user gave for the shell.
2540 path = strrchr(path, '/');
2542 path = UNCONST(shellPath);
2546 if (newShell.name != NULL) {
2547 shellName = newShell.name;
2552 if ((sh = JobMatchShell(shellName)) == NULL) {
2553 Parse_Error(PARSE_WARNING, "%s: No matching shell",
2560 commandShell = bmake_malloc(sizeof(Shell));
2561 *commandShell = newShell;
2563 /* this will take care of shellErrFlag */
2567 if (commandShell->echoOn && commandShell->echoOff) {
2568 commandShell->hasEchoCtl = TRUE;
2571 if (!commandShell->hasErrCtl) {
2572 if (commandShell->errCheck == NULL) {
2573 commandShell->errCheck = "";
2575 if (commandShell->ignErr == NULL) {
2576 commandShell->ignErr = "%s\n";
2581 * Do not free up the words themselves, since they might be in use by the
2582 * shell specification.
2589 *-----------------------------------------------------------------------
2591 * Handle the receipt of an interrupt.
2594 * runINTERRUPT Non-zero if commands for the .INTERRUPT target
2595 * should be executed
2596 * signo signal received
2602 * All children are killed. Another job will be started if the
2603 * .INTERRUPT target was given.
2604 *-----------------------------------------------------------------------
2607 JobInterrupt(int runINTERRUPT, int signo)
2609 Job *job; /* job descriptor in that element */
2610 GNode *interrupt; /* the node describing the .INTERRUPT target */
2614 aborting = ABORT_INTERRUPT;
2618 for (job = job_table; job < job_table_end; job++) {
2619 if (job->job_state != JOB_ST_RUNNING)
2624 JobDeleteTarget(gn);
2627 (void)fprintf(debug_file,
2628 "JobInterrupt passing signal %d to child %d.\n",
2631 KILLPG(job->pid, signo);
2635 JobSigUnlock(&mask);
2637 if (runINTERRUPT && !touchFlag) {
2638 interrupt = Targ_FindNode(".INTERRUPT", TARG_NOCREATE);
2639 if (interrupt != NULL) {
2640 ignoreErrors = FALSE;
2644 Trace_Log(MAKEINTR, 0);
2649 *-----------------------------------------------------------------------
2651 * Do final processing such as the running of the commands
2652 * attached to the .END target.
2655 * Number of errors reported.
2659 *-----------------------------------------------------------------------
2664 if (postCommands != NULL &&
2665 (!Lst_IsEmpty(postCommands->commands) ||
2666 !Lst_IsEmpty(postCommands->children))) {
2668 Error("Errors reported so .END ignored");
2670 JobRun(postCommands);
2677 *-----------------------------------------------------------------------
2679 * Cleanup any memory used by the jobs module
2686 *-----------------------------------------------------------------------
2697 *-----------------------------------------------------------------------
2699 * Waits for all running jobs to finish and returns. Sets 'aborting'
2700 * to ABORT_WAIT to prevent other jobs from starting.
2706 * Currently running jobs finish.
2708 *-----------------------------------------------------------------------
2713 aborting = ABORT_WAIT;
2714 while (jobTokensRunning != 0) {
2721 *-----------------------------------------------------------------------
2723 * Abort all currently running jobs without handling output or anything.
2724 * This function is to be called only in the event of a major
2725 * error. Most definitely NOT to be called from JobInterrupt.
2731 * All children are killed, not just the firstborn
2732 *-----------------------------------------------------------------------
2737 Job *job; /* the job descriptor in that element */
2740 aborting = ABORT_ERROR;
2742 if (jobTokensRunning) {
2743 for (job = job_table; job < job_table_end; job++) {
2744 if (job->job_state != JOB_ST_RUNNING)
2747 * kill the child process with increasingly drastic signals to make
2748 * darn sure it's dead.
2750 KILLPG(job->pid, SIGINT);
2751 KILLPG(job->pid, SIGKILL);
2756 * Catch as many children as want to report in at first, then give up
2758 while (waitpid((pid_t) -1, &foo, WNOHANG) > 0)
2763 *-----------------------------------------------------------------------
2765 * Tries to restart stopped jobs if there are slots available.
2766 * Called in process context in response to a SIGCONT.
2774 *-----------------------------------------------------------------------
2777 JobRestartJobs(void)
2781 for (job = job_table; job < job_table_end; job++) {
2782 if (job->job_state == JOB_ST_RUNNING &&
2783 (make_suspended || job->job_suspended)) {
2785 (void)fprintf(debug_file, "Restarting stopped job pid %d.\n",
2788 if (job->job_suspended) {
2789 (void)printf("*** [%s] Continued\n", job->node->name);
2790 (void)fflush(stdout);
2792 job->job_suspended = 0;
2793 if (KILLPG(job->pid, SIGCONT) != 0 && DEBUG(JOB)) {
2794 fprintf(debug_file, "Failed to send SIGCONT to %d\n", job->pid);
2797 if (job->job_state == JOB_ST_FINISHED)
2798 /* Job exit deferred after calling waitpid() in a signal handler */
2799 JobFinish(job, job->exit_status);
2807 if (job->inPollfd != NULL)
2808 Punt("Watching watched job");
2810 fds[nfds].fd = job->inPipe;
2811 fds[nfds].events = POLLIN;
2813 job->inPollfd = &fds[nfds];
2815 #if defined(USE_FILEMON) && !defined(USE_FILEMON_DEV)
2817 fds[nfds].fd = meta_job_fd(job);
2818 fds[nfds].events = fds[nfds].fd == -1 ? 0 : POLLIN;
2829 if (job->inPollfd == NULL)
2830 Punt("Unwatching unwatched job");
2831 i = job->inPollfd - fds;
2833 #if defined(USE_FILEMON) && !defined(USE_FILEMON_DEV)
2836 * Sanity check: there should be two fds per job, so the job's
2837 * pollfd number should be even.
2839 assert(nfds_per_job() == 2);
2841 Punt("odd-numbered fd with meta");
2846 * Move last job in table into hole made by dead job.
2850 jobfds[i] = jobfds[nfds];
2851 jobfds[i]->inPollfd = &fds[i];
2852 #if defined(USE_FILEMON) && !defined(USE_FILEMON_DEV)
2854 fds[i + 1] = fds[nfds + 1];
2855 jobfds[i + 1] = jobfds[nfds + 1];
2859 job->inPollfd = NULL;
2865 if (job->inPollfd == NULL)
2866 Punt("Polling unwatched job");
2867 return (job->inPollfd->revents & POLLIN) != 0;
2871 *-----------------------------------------------------------------------
2873 * Put a token into the job pipe so that some make process can start
2877 * Allows more build jobs to be spawned somewhere.
2879 *-----------------------------------------------------------------------
2885 char tok = JOB_TOKENS[aborting], tok1;
2887 /* If we are depositing an error token flush everything else */
2888 while (tok != '+' && read(tokenWaitJob.inPipe, &tok1, 1) == 1)
2892 fprintf(debug_file, "(%d) aborting %d, deposit token %c\n",
2893 getpid(), aborting, JOB_TOKENS[aborting]);
2894 while (write(tokenWaitJob.outPipe, &tok, 1) == -1 && errno == EAGAIN)
2899 *-----------------------------------------------------------------------
2900 * Job_ServerStartTokenAdd --
2901 * Prep the job token pipe in the root make process.
2903 *-----------------------------------------------------------------------
2907 Job_ServerStart(int max_tokens, int jp_0, int jp_1)
2912 if (jp_0 >= 0 && jp_1 >= 0) {
2913 /* Pipe passed in from parent */
2914 tokenWaitJob.inPipe = jp_0;
2915 tokenWaitJob.outPipe = jp_1;
2916 (void)fcntl(jp_0, F_SETFD, FD_CLOEXEC);
2917 (void)fcntl(jp_1, F_SETFD, FD_CLOEXEC);
2921 JobCreatePipe(&tokenWaitJob, 15);
2923 snprintf(jobarg, sizeof(jobarg), "%d,%d",
2924 tokenWaitJob.inPipe, tokenWaitJob.outPipe);
2926 Var_Append(MAKEFLAGS, "-J", VAR_GLOBAL);
2927 Var_Append(MAKEFLAGS, jobarg, VAR_GLOBAL);
2930 * Preload the job pipe with one token per job, save the one
2931 * "extra" token for the primary job.
2933 * XXX should clip maxJobs against PIPE_BUF -- if max_tokens is
2934 * larger than the write buffer size of the pipe, we will
2937 for (i = 1; i < max_tokens; i++)
2942 *-----------------------------------------------------------------------
2943 * Job_TokenReturn --
2944 * Return a withdrawn token to the pool.
2946 *-----------------------------------------------------------------------
2950 Job_TokenReturn(void)
2953 if (jobTokensRunning < 0)
2954 Punt("token botch");
2955 if (jobTokensRunning || JOB_TOKENS[aborting] != '+')
2960 *-----------------------------------------------------------------------
2961 * Job_TokenWithdraw --
2962 * Attempt to withdraw a token from the pool.
2965 * Returns TRUE if a token was withdrawn, and FALSE if the pool
2966 * is currently empty.
2969 * If pool is empty, set wantToken so that we wake up
2970 * when a token is released.
2972 *-----------------------------------------------------------------------
2977 Job_TokenWithdraw(void)
2984 fprintf(debug_file, "Job_TokenWithdraw(%d): aborting %d, running %d\n",
2985 getpid(), aborting, jobTokensRunning);
2987 if (aborting || (jobTokensRunning >= maxJobs))
2990 count = read(tokenWaitJob.inPipe, &tok, 1);
2992 Fatal("eof on job pipe!");
2993 if (count < 0 && jobTokensRunning != 0) {
2994 if (errno != EAGAIN) {
2995 Fatal("job pipe read: %s", strerror(errno));
2998 fprintf(debug_file, "(%d) blocked for token\n", getpid());
3002 if (count == 1 && tok != '+') {
3003 /* make being abvorted - remove any other job tokens */
3005 fprintf(debug_file, "(%d) aborted by token %c\n", getpid(), tok);
3006 while (read(tokenWaitJob.inPipe, &tok1, 1) == 1)
3008 /* And put the stopper back */
3009 while (write(tokenWaitJob.outPipe, &tok, 1) == -1 && errno == EAGAIN)
3011 if (dieQuietly(NULL, 1))
3013 Fatal("A failure has been detected in another branch of the parallel make");
3016 if (count == 1 && jobTokensRunning == 0)
3017 /* We didn't want the token really */
3018 while (write(tokenWaitJob.outPipe, &tok, 1) == -1 && errno == EAGAIN)
3023 fprintf(debug_file, "(%d) withdrew token\n", getpid());
3028 *-----------------------------------------------------------------------
3030 * Run the named target if found. If a filename is specified, then
3031 * set that to the sources.
3037 * exits if the target fails.
3039 *-----------------------------------------------------------------------
3042 Job_RunTarget(const char *target, const char *fname) {
3043 GNode *gn = Targ_FindNode(target, TARG_NOCREATE);
3049 Var_Set(ALLSRC, fname, gn);
3052 if (gn->made == ERROR) {
3053 PrintOnError(gn, "\n\nStop.");
3061 emul_poll(struct pollfd *fd, int nfd, int timeout)
3064 int i, maxfd, nselect, npoll;
3065 struct timeval tv, *tvp;
3072 for (i = 0; i < nfd; i++) {
3075 if (fd[i].events & POLLIN)
3076 FD_SET(fd[i].fd, &rfds);
3078 if (fd[i].events & POLLOUT)
3079 FD_SET(fd[i].fd, &wfds);
3081 if (fd[i].fd > maxfd)
3085 if (maxfd >= FD_SETSIZE) {
3086 Punt("Ran out of fd_set slots; "
3087 "recompile with a larger FD_SETSIZE.");
3093 usecs = timeout * 1000;
3094 tv.tv_sec = usecs / 1000000;
3095 tv.tv_usec = usecs % 1000000;
3099 nselect = select(maxfd + 1, &rfds, &wfds, 0, tvp);
3105 for (i = 0; i < nfd; i++) {
3106 if (FD_ISSET(fd[i].fd, &rfds))
3107 fd[i].revents |= POLLIN;
3109 if (FD_ISSET(fd[i].fd, &wfds))
3110 fd[i].revents |= POLLOUT;
3118 #endif /* USE_SELECT */