1 /* $NetBSD: job.c,v 1.188 2016/08/26 23:28:39 dholland Exp $ */
4 * Copyright (c) 1988, 1989, 1990 The Regents of the University of California.
7 * This code is derived from software contributed to Berkeley by
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * Copyright (c) 1988, 1989 by Adam de Boor
37 * Copyright (c) 1989 by Berkeley Softworks
38 * All rights reserved.
40 * This code is derived from software contributed to Berkeley by
43 * Redistribution and use in source and binary forms, with or without
44 * modification, are permitted provided that the following conditions
46 * 1. Redistributions of source code must retain the above copyright
47 * notice, this list of conditions and the following disclaimer.
48 * 2. Redistributions in binary form must reproduce the above copyright
49 * notice, this list of conditions and the following disclaimer in the
50 * documentation and/or other materials provided with the distribution.
51 * 3. All advertising materials mentioning features or use of this software
52 * must display the following acknowledgement:
53 * This product includes software developed by the University of
54 * California, Berkeley and its contributors.
55 * 4. Neither the name of the University nor the names of its contributors
56 * may be used to endorse or promote products derived from this software
57 * without specific prior written permission.
59 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
60 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
61 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
62 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
63 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
64 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
65 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
66 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
67 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
68 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
73 static char rcsid
[] = "$NetBSD: job.c,v 1.188 2016/08/26 23:28:39 dholland Exp $";
75 #include <sys/cdefs.h>
78 static char sccsid
[] = "@(#)job.c 8.2 (Berkeley) 3/19/94";
80 __RCSID("$NetBSD: job.c,v 1.188 2016/08/26 23:28:39 dholland Exp $");
87 * handle the creation etc. of our child processes.
90 * Job_Make Start the creation of the given target.
92 * Job_CatchChildren Check for and handle the termination of any
93 * children. This must be called reasonably
94 * frequently to keep the whole make going at
95 * a decent clip, since job table entries aren't
96 * removed until their process is caught this way.
98 * Job_CatchOutput Print any output our children have produced.
99 * Should also be called fairly frequently to
100 * keep the user informed of what's going on.
101 * If no output is waiting, it will block for
102 * a time given by the SEL_* constants, below,
103 * or until output is ready.
105 * Job_Init Called to intialize this module. in addition,
106 * any commands attached to the .BEGIN target
107 * are executed before this function returns.
108 * Hence, the makefile must have been parsed
109 * before this function is called.
111 * Job_End Cleanup any memory used.
113 * Job_ParseShell Given the line following a .SHELL target, parse
114 * the line as a shell specification. Returns
115 * FAILURE if the spec was incorrect.
117 * Job_Finish Perform any final processing which needs doing.
118 * This includes the execution of any commands
119 * which have been/were attached to the .END
120 * target. It should only be called when the
121 * job table is empty.
123 * Job_AbortAll Abort all currently running jobs. It doesn't
124 * handle output or do anything for the jobs,
125 * just kills them. It should only be called in
126 * an emergency, as it were.
128 * Job_CheckCommands Verify that the commands for a target are
129 * ok. Provide them if necessary and possible.
131 * Job_Touch Update a target without really updating it.
133 * Job_Wait Wait for all currently-running jobs to finish.
139 #include <sys/types.h>
140 #include <sys/stat.h>
141 #include <sys/file.h>
142 #include <sys/time.h>
147 #if !defined(USE_SELECT) && defined(HAVE_POLL_H)
150 #ifndef USE_SELECT /* no poll.h */
153 #if defined(HAVE_SYS_SELECT_H)
154 # include <sys/select.h>
161 #if defined(HAVE_SYS_SOCKET_H)
162 # include <sys/socket.h>
169 #include "pathnames.h"
171 # define STATIC static
174 * 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 char *shellErrFlag
= NULL
;
316 static const char *shellArgv
= NULL
; /* Custom shell args */
319 STATIC Job
*job_table
; /* The structures that describe them */
320 STATIC Job
*job_table_end
; /* job_table + maxJobs */
321 static int wantToken
; /* we want a token */
322 static int lurking_children
= 0;
323 static int make_suspended
= 0; /* non-zero if we've seen a SIGTSTP (etc) */
326 * Set of descriptors of pipes connected to
327 * the output channels of children
329 static struct pollfd
*fds
= NULL
;
330 static Job
**jobfds
= NULL
;
332 static void watchfd(Job
*);
333 static void clearfd(Job
*);
334 static int readyfd(Job
*);
336 STATIC GNode
*lastNode
; /* The node for which output was most recently
338 static char *targPrefix
= NULL
; /* What we print at the start of TARG_FMT */
339 static Job tokenWaitJob
; /* token wait pseudo-job */
341 static Job childExitJob
; /* child exit pseudo-job */
342 #define CHILD_EXIT "."
343 #define DO_JOB_RESUME "R"
345 #define TARG_FMT "%s %s ---\n" /* Default format */
346 #define MESSAGE(fp, gn) \
347 if (maxJobs != 1 && targPrefix && *targPrefix) \
348 (void)fprintf(fp, TARG_FMT, targPrefix, gn->name)
350 static sigset_t caught_signals
; /* Set of signals we handle */
352 #define KILLPG(pid, sig) kill(-(pid), (sig))
354 #define KILLPG(pid, sig) killpg((pid), (sig))
357 static void JobChildSig(int);
358 static void JobContinueSig(int);
359 static Job
*JobFindPid(int, int, Boolean
);
360 static int JobPrintCommand(void *, void *);
361 static int JobSaveCommand(void *, void *);
362 static void JobClose(Job
*);
363 static void JobExec(Job
*, char **);
364 static void JobMakeArgv(Job
*, char **);
365 static int JobStart(GNode
*, int);
366 static char *JobOutput(Job
*, char *, char *, int);
367 static void JobDoOutput(Job
*, Boolean
);
368 static Shell
*JobMatchShell(const char *);
369 static void JobInterrupt(int, int) MAKE_ATTR_DEAD
;
370 static void JobRestartJobs(void);
371 static void JobTokenAdd(void);
372 static void JobSigLock(sigset_t
*);
373 static void JobSigUnlock(sigset_t
*);
374 static void JobSigReset(void);
376 const char *malloc_options
="A";
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 (void)fcntl(job
->jobPipe
[0], F_SETFD
, FD_CLOEXEC
);
443 (void)fcntl(job
->jobPipe
[1], F_SETFD
, FD_CLOEXEC
);
446 * We mark the input side of the pipe non-blocking; we poll(2) the
447 * pipe when we're waiting for a job token, but we might lose the
448 * race for the token when a new one becomes available, so the read
449 * from the pipe should not block.
451 fcntl(job
->jobPipe
[0], F_SETFL
,
452 fcntl(job
->jobPipe
[0], F_GETFL
, 0) | O_NONBLOCK
);
456 *-----------------------------------------------------------------------
458 * Pass a signal to a job
461 * signop Signal to send it
464 * None, except the job may bite it.
466 *-----------------------------------------------------------------------
469 JobCondPassSig(int signo
)
474 (void)fprintf(debug_file
, "JobCondPassSig(%d) called.\n", signo
);
477 for (job
= job_table
; job
< job_table_end
; job
++) {
478 if (job
->job_state
!= JOB_ST_RUNNING
)
481 (void)fprintf(debug_file
,
482 "JobCondPassSig passing signal %d to child %d.\n",
485 KILLPG(job
->pid
, signo
);
490 *-----------------------------------------------------------------------
495 * signo The signal number we've received
501 * Sends a token on the child exit pipe to wake us up from
504 *-----------------------------------------------------------------------
507 JobChildSig(int signo MAKE_ATTR_UNUSED
)
509 while (write(childExitJob
.outPipe
, CHILD_EXIT
, 1) == -1 && errno
== EAGAIN
)
515 *-----------------------------------------------------------------------
517 * Resume all stopped jobs.
520 * signo The signal number we've received
526 * Jobs start running again.
528 *-----------------------------------------------------------------------
531 JobContinueSig(int signo MAKE_ATTR_UNUSED
)
534 * Defer sending to SIGCONT to our stopped children until we return
535 * from the signal handler.
537 while (write(childExitJob
.outPipe
, DO_JOB_RESUME
, 1) == -1 &&
543 *-----------------------------------------------------------------------
545 * Pass a signal on to all jobs, then resend to ourselves.
548 * signo The signal number we've received
554 * We die by the same signal.
556 *-----------------------------------------------------------------------
558 MAKE_ATTR_DEAD
static void
559 JobPassSig_int(int signo
)
561 /* Run .INTERRUPT target then exit */
562 JobInterrupt(TRUE
, signo
);
565 MAKE_ATTR_DEAD
static void
566 JobPassSig_term(int signo
)
568 /* Dont run .INTERRUPT target then exit */
569 JobInterrupt(FALSE
, signo
);
573 JobPassSig_suspend(int signo
)
575 sigset_t nmask
, omask
;
576 struct sigaction act
;
578 /* Suppress job started/continued messages */
581 /* Pass the signal onto every job */
582 JobCondPassSig(signo
);
585 * Send ourselves the signal now we've given the message to everyone else.
586 * Note we block everything else possible while we're getting the signal.
587 * This ensures that all our jobs get continued when we wake up before
588 * we take any other signal.
591 sigdelset(&nmask
, signo
);
592 (void)sigprocmask(SIG_SETMASK
, &nmask
, &omask
);
594 act
.sa_handler
= SIG_DFL
;
595 sigemptyset(&act
.sa_mask
);
597 (void)sigaction(signo
, &act
, NULL
);
600 (void)fprintf(debug_file
,
601 "JobPassSig passing signal %d to self.\n", signo
);
604 (void)kill(getpid(), signo
);
607 * We've been continued.
609 * A whole host of signals continue to happen!
610 * SIGCHLD for any processes that actually suspended themselves.
611 * SIGCHLD for any processes that exited while we were alseep.
612 * The SIGCONT that actually caused us to wakeup.
614 * Since we defer passing the SIGCONT on to our children until
615 * the main processing loop, we can be sure that all the SIGCHLD
616 * events will have happened by then - and that the waitpid() will
617 * collect the child 'suspended' events.
618 * For correct sequencing we just need to ensure we process the
619 * waitpid() before passign on the SIGCONT.
621 * In any case nothing else is needed here.
624 /* Restore handler and signal mask */
625 act
.sa_handler
= JobPassSig_suspend
;
626 (void)sigaction(signo
, &act
, NULL
);
627 (void)sigprocmask(SIG_SETMASK
, &omask
, NULL
);
631 *-----------------------------------------------------------------------
633 * Compare the pid of the job with the given pid and return 0 if they
634 * are equal. This function is called from Job_CatchChildren
635 * to find the job descriptor of the finished job.
639 * pid process id desired
642 * Job with matching pid
646 *-----------------------------------------------------------------------
649 JobFindPid(int pid
, int status
, Boolean isJobs
)
653 for (job
= job_table
; job
< job_table_end
; job
++) {
654 if ((job
->job_state
== status
) && job
->pid
== pid
)
657 if (DEBUG(JOB
) && isJobs
)
658 job_table_dump("no pid");
663 *-----------------------------------------------------------------------
665 * Put out another command for the given job. If the command starts
666 * with an @ or a - we process it specially. In the former case,
667 * so long as the -s and -n flags weren't given to make, we stick
668 * a shell-specific echoOff command in the script. In the latter,
669 * we ignore errors for the entire job, unless the shell has error
671 * If the command is just "..." we take all future commands for this
672 * job to be commands to be executed once the entire graph has been
673 * made and return non-zero to signal that the end of the commands
674 * was reached. These commands are later attached to the postCommands
675 * node and executed by Job_End when all things are done.
676 * This function is called from JobStart via Lst_ForEach.
679 * cmdp command string to print
680 * jobp job for which to print it
683 * Always 0, unless the command was "..."
686 * If the command begins with a '-' and the shell has no error control,
687 * the JOB_IGNERR flag is set in the job descriptor.
688 * If the command is "..." and we're not ignoring such things,
689 * tailCmds is set to the successor node of the cmd.
690 * numCommands is incremented if the command is actually printed.
691 *-----------------------------------------------------------------------
694 JobPrintCommand(void *cmdp
, void *jobp
)
696 Boolean noSpecials
; /* true if we shouldn't worry about
697 * inserting special commands into
698 * the input stream. */
699 Boolean shutUp
= FALSE
; /* true if we put a no echo command
700 * into the command file */
701 Boolean errOff
= FALSE
; /* true if we turned error checking
702 * off before printing the command
703 * and need to turn it back on */
704 const char *cmdTemplate
; /* Template to use when printing the
706 char *cmdStart
; /* Start of expanded command */
707 char *escCmd
= NULL
; /* Command with quotes/backticks escaped */
708 char *cmd
= (char *)cmdp
;
709 Job
*job
= (Job
*)jobp
;
712 noSpecials
= NoExecute(job
->node
);
714 if (strcmp(cmd
, "...") == 0) {
715 job
->node
->type
|= OP_SAVE_CMDS
;
716 if ((job
->flags
& JOB_IGNDOTS
) == 0) {
717 job
->tailCmds
= Lst_Succ(Lst_Member(job
->node
->commands
,
724 #define DBPRINTF(fmt, arg) if (DEBUG(JOB)) { \
725 (void)fprintf(debug_file, fmt, arg); \
727 (void)fprintf(job->cmdFILE, fmt, arg); \
728 (void)fflush(job->cmdFILE);
732 cmdStart
= cmd
= Var_Subst(NULL
, cmd
, job
->node
, VARF_WANTRES
);
734 cmdTemplate
= "%s\n";
737 * Check for leading @' and -'s to control echoing and error checking.
739 while (*cmd
== '@' || *cmd
== '-' || (*cmd
== '+')) {
742 shutUp
= DEBUG(LOUD
) ? FALSE
: TRUE
;
750 * We're not actually executing anything...
751 * but this one needs to be - use compat mode just for it.
753 CompatRunCommand(cmdp
, job
->node
);
761 while (isspace((unsigned char) *cmd
))
765 * If the shell doesn't have error control the alternate echo'ing will
766 * be done (to avoid showing additional error checking code)
767 * and this will need the characters '$ ` \ "' escaped
770 if (!commandShell
->hasErrCtl
) {
771 /* Worst that could happen is every char needs escaping. */
772 escCmd
= bmake_malloc((strlen(cmd
) * 2) + 1);
773 for (i
= 0, j
= 0; cmd
[i
] != '\0'; i
++, j
++) {
774 if (cmd
[i
] == '$' || cmd
[i
] == '`' || cmd
[i
] == '\\' ||
783 if (!(job
->flags
& JOB_SILENT
) && !noSpecials
&&
784 commandShell
->hasEchoCtl
) {
785 DBPRINTF("%s\n", commandShell
->echoOff
);
787 if (commandShell
->hasErrCtl
)
794 if (commandShell
->hasErrCtl
) {
796 * we don't want the error-control commands showing
797 * up either, so we turn off echoing while executing
798 * them. We could put another field in the shell
799 * structure to tell JobDoOutput to look for this
800 * string too, but why make it any more complex than
803 if (!(job
->flags
& JOB_SILENT
) && !shutUp
&&
804 commandShell
->hasEchoCtl
) {
805 DBPRINTF("%s\n", commandShell
->echoOff
);
806 DBPRINTF("%s\n", commandShell
->ignErr
);
807 DBPRINTF("%s\n", commandShell
->echoOn
);
809 DBPRINTF("%s\n", commandShell
->ignErr
);
811 } else if (commandShell
->ignErr
&&
812 (*commandShell
->ignErr
!= '\0'))
815 * The shell has no error control, so we need to be
816 * weird to get it to ignore any errors from the command.
817 * If echoing is turned on, we turn it off and use the
818 * errCheck template to echo the command. Leave echoing
819 * off so the user doesn't see the weirdness we go through
820 * to ignore errors. Set cmdTemplate to use the weirdness
821 * instead of the simple "%s\n" template.
823 job
->flags
|= JOB_IGNERR
;
824 if (!(job
->flags
& JOB_SILENT
) && !shutUp
) {
825 if (commandShell
->hasEchoCtl
) {
826 DBPRINTF("%s\n", commandShell
->echoOff
);
828 DBPRINTF(commandShell
->errCheck
, escCmd
);
832 DBPRINTF(commandShell
->errCheck
, escCmd
);
835 cmdTemplate
= commandShell
->ignErr
;
837 * The error ignoration (hee hee) is already taken care
838 * of by the ignErr template, so pretend error checking
851 * If errors are being checked and the shell doesn't have error control
852 * but does supply an errOut template, then setup commands to run
856 if (!commandShell
->hasErrCtl
&& commandShell
->errOut
&&
857 (*commandShell
->errOut
!= '\0')) {
858 if (!(job
->flags
& JOB_SILENT
) && !shutUp
) {
859 if (commandShell
->hasEchoCtl
) {
860 DBPRINTF("%s\n", commandShell
->echoOff
);
862 DBPRINTF(commandShell
->errCheck
, escCmd
);
865 /* If it's a comment line or blank, treat as an ignored error */
866 if ((escCmd
[0] == commandShell
->commentChar
) ||
868 cmdTemplate
= commandShell
->ignErr
;
870 cmdTemplate
= commandShell
->errOut
;
875 if (DEBUG(SHELL
) && strcmp(shellName
, "sh") == 0 &&
876 (job
->flags
& JOB_TRACED
) == 0) {
877 DBPRINTF("set -%s\n", "x");
878 job
->flags
|= JOB_TRACED
;
881 DBPRINTF(cmdTemplate
, cmd
);
886 * If echoing is already off, there's no point in issuing the
887 * echoOff command. Otherwise we issue it and pretend it was on
888 * for the whole command...
890 if (!shutUp
&& !(job
->flags
& JOB_SILENT
) && commandShell
->hasEchoCtl
){
891 DBPRINTF("%s\n", commandShell
->echoOff
);
894 DBPRINTF("%s\n", commandShell
->errCheck
);
896 if (shutUp
&& commandShell
->hasEchoCtl
) {
897 DBPRINTF("%s\n", commandShell
->echoOn
);
903 *-----------------------------------------------------------------------
905 * Save a command to be executed when everything else is done.
906 * Callback function for JobFinish...
912 * The command is tacked onto the end of postCommands's commands list.
914 *-----------------------------------------------------------------------
917 JobSaveCommand(void *cmd
, void *gn
)
919 cmd
= Var_Subst(NULL
, (char *)cmd
, (GNode
*)gn
, VARF_WANTRES
);
920 (void)Lst_AtEnd(postCommands
->commands
, cmd
);
926 *-----------------------------------------------------------------------
928 * Called to close both input and output pipes when a job is finished.
934 * The file descriptors associated with the job are closed.
936 *-----------------------------------------------------------------------
942 (void)close(job
->outPipe
);
945 JobDoOutput(job
, TRUE
);
946 (void)close(job
->inPipe
);
951 *-----------------------------------------------------------------------
953 * Do final processing for the given job including updating
954 * parents and starting new jobs as available/necessary. Note
955 * that we pay no attention to the JOB_IGNERR flag here.
956 * This is because when we're called because of a noexecute flag
957 * or something, jstat.w_status is 0 and when called from
958 * Job_CatchChildren, the status is zeroed if it s/b ignored.
962 * status sub-why job went away
968 * Final commands for the job are placed on postCommands.
970 * If we got an error and are aborting (aborting == ABORT_ERROR) and
971 * the job list is now empty, we are done for the day.
972 * If we recognized an error (errors !=0), we set the aborting flag
973 * to ABORT_ERROR so no more jobs will be started.
974 *-----------------------------------------------------------------------
978 JobFinish (Job
*job
, WAIT_T status
)
980 Boolean done
, return_job_token
;
983 fprintf(debug_file
, "Jobfinish: %d [%s], status %d\n",
984 job
->pid
, job
->node
->name
, status
);
987 if ((WIFEXITED(status
) &&
988 (((WEXITSTATUS(status
) != 0) && !(job
->flags
& JOB_IGNERR
)))) ||
992 * If it exited non-zero and either we're doing things our
993 * way or we're not ignoring errors, the job is finished.
994 * Similarly, if the shell died because of a signal
995 * the job is also finished. In these
996 * cases, finish out the job's output before printing the exit
1000 if (job
->cmdFILE
!= NULL
&& job
->cmdFILE
!= stdout
) {
1001 (void)fclose(job
->cmdFILE
);
1002 job
->cmdFILE
= NULL
;
1005 } else if (WIFEXITED(status
)) {
1007 * Deal with ignored errors in -B mode. We need to print a message
1008 * telling of the ignored error as well as setting status.w_status
1009 * to 0 so the next command gets run. To do this, we set done to be
1010 * TRUE if in -B mode and the job exited non-zero.
1012 done
= WEXITSTATUS(status
) != 0;
1014 * Old comment said: "Note we don't
1015 * want to close down any of the streams until we know we're at the
1017 * But we do. Otherwise when are we going to print the rest of the
1023 * No need to close things down or anything.
1029 if (WIFEXITED(status
)) {
1031 (void)fprintf(debug_file
, "Process %d [%s] exited.\n",
1032 job
->pid
, job
->node
->name
);
1034 if (WEXITSTATUS(status
) != 0) {
1035 if (job
->node
!= lastNode
) {
1036 MESSAGE(stdout
, job
->node
);
1037 lastNode
= job
->node
;
1041 meta_job_error(job
, job
->node
, job
->flags
, WEXITSTATUS(status
));
1044 (void)printf("*** [%s] Error code %d%s\n",
1046 WEXITSTATUS(status
),
1047 (job
->flags
& JOB_IGNERR
) ? " (ignored)" : "");
1048 if (job
->flags
& JOB_IGNERR
) {
1049 WAIT_STATUS(status
) = 0;
1051 if (deleteOnError
) {
1052 JobDeleteTarget(job
->node
);
1054 PrintOnError(job
->node
, NULL
);
1056 } else if (DEBUG(JOB
)) {
1057 if (job
->node
!= lastNode
) {
1058 MESSAGE(stdout
, job
->node
);
1059 lastNode
= job
->node
;
1061 (void)printf("*** [%s] Completed successfully\n",
1065 if (job
->node
!= lastNode
) {
1066 MESSAGE(stdout
, job
->node
);
1067 lastNode
= job
->node
;
1069 (void)printf("*** [%s] Signal %d\n",
1070 job
->node
->name
, WTERMSIG(status
));
1071 if (deleteOnError
) {
1072 JobDeleteTarget(job
->node
);
1075 (void)fflush(stdout
);
1082 if ((x
= meta_job_finish(job
)) != 0 && status
== 0) {
1088 return_job_token
= FALSE
;
1090 Trace_Log(JOBEND
, job
);
1091 if (!(job
->flags
& JOB_SPECIAL
)) {
1092 if ((WAIT_STATUS(status
) != 0) ||
1093 (aborting
== ABORT_ERROR
) ||
1094 (aborting
== ABORT_INTERRUPT
))
1095 return_job_token
= TRUE
;
1098 if ((aborting
!= ABORT_ERROR
) && (aborting
!= ABORT_INTERRUPT
) &&
1099 (WAIT_STATUS(status
) == 0)) {
1101 * As long as we aren't aborting and the job didn't return a non-zero
1102 * status that we shouldn't ignore, we call Make_Update to update
1103 * the parents. In addition, any saved commands for the node are placed
1104 * on the .END target.
1106 if (job
->tailCmds
!= NULL
) {
1107 Lst_ForEachFrom(job
->node
->commands
, job
->tailCmds
,
1111 job
->node
->made
= MADE
;
1112 if (!(job
->flags
& JOB_SPECIAL
))
1113 return_job_token
= TRUE
;
1114 Make_Update(job
->node
);
1115 job
->job_state
= JOB_ST_FREE
;
1116 } else if (WAIT_STATUS(status
)) {
1118 job
->job_state
= JOB_ST_FREE
;
1122 * Set aborting if any error.
1124 if (errors
&& !keepgoing
&& (aborting
!= ABORT_INTERRUPT
)) {
1126 * If we found any errors in this batch of children and the -k flag
1127 * wasn't given, we set the aborting flag so no more jobs get
1130 aborting
= ABORT_ERROR
;
1133 if (return_job_token
)
1136 if (aborting
== ABORT_ERROR
&& jobTokensRunning
== 0) {
1138 * If we are aborting and the job table is now empty, we finish.
1145 *-----------------------------------------------------------------------
1147 * Touch the given target. Called by JobStart when the -t flag was
1151 * gn the node of the file to touch
1152 * silent TRUE if should not print message
1158 * The data modification of the file is changed. In addition, if the
1159 * file did not exist, it is created.
1160 *-----------------------------------------------------------------------
1163 Job_Touch(GNode
*gn
, Boolean silent
)
1165 int streamID
; /* ID of stream opened to do the touch */
1166 struct utimbuf times
; /* Times for utime() call */
1168 if (gn
->type
& (OP_JOIN
|OP_USE
|OP_USEBEFORE
|OP_EXEC
|OP_OPTIONAL
|
1169 OP_SPECIAL
|OP_PHONY
)) {
1171 * .JOIN, .USE, .ZEROTIME and .OPTIONAL targets are "virtual" targets
1172 * and, as such, shouldn't really be created.
1177 if (!silent
|| NoExecute(gn
)) {
1178 (void)fprintf(stdout
, "touch %s\n", gn
->name
);
1179 (void)fflush(stdout
);
1182 if (NoExecute(gn
)) {
1186 if (gn
->type
& OP_ARCHV
) {
1188 } else if (gn
->type
& OP_LIB
) {
1191 char *file
= gn
->path
? gn
->path
: gn
->name
;
1193 times
.actime
= times
.modtime
= now
;
1194 if (utime(file
, ×
) < 0){
1195 streamID
= open(file
, O_RDWR
| O_CREAT
, 0666);
1197 if (streamID
>= 0) {
1201 * Read and write a byte to the file to change the
1202 * modification time, then close the file.
1204 if (read(streamID
, &c
, 1) == 1) {
1205 (void)lseek(streamID
, (off_t
)0, SEEK_SET
);
1206 while (write(streamID
, &c
, 1) == -1 && errno
== EAGAIN
)
1210 (void)close(streamID
);
1212 (void)fprintf(stdout
, "*** couldn't touch %s: %s",
1213 file
, strerror(errno
));
1214 (void)fflush(stdout
);
1221 *-----------------------------------------------------------------------
1222 * Job_CheckCommands --
1223 * Make sure the given node has all the commands it needs.
1226 * gn The target whose commands need verifying
1227 * abortProc Function to abort with message
1230 * TRUE if the commands list is/was ok.
1233 * The node will have commands from the .DEFAULT rule added to it
1235 *-----------------------------------------------------------------------
1238 Job_CheckCommands(GNode
*gn
, void (*abortProc
)(const char *, ...))
1240 if (OP_NOP(gn
->type
) && Lst_IsEmpty(gn
->commands
) &&
1241 ((gn
->type
& OP_LIB
) == 0 || Lst_IsEmpty(gn
->children
))) {
1243 * No commands. Look for .DEFAULT rule from which we might infer
1246 if ((DEFAULT
!= NULL
) && !Lst_IsEmpty(DEFAULT
->commands
) &&
1247 (gn
->type
& OP_SPECIAL
) == 0) {
1250 * Make only looks for a .DEFAULT if the node was never the
1251 * target of an operator, so that's what we do too. If
1252 * a .DEFAULT was given, we substitute its commands for gn's
1253 * commands and set the IMPSRC variable to be the target's name
1254 * The DEFAULT node acts like a transformation rule, in that
1255 * gn also inherits any attributes or sources attached to
1258 Make_HandleUse(DEFAULT
, gn
);
1259 Var_Set(IMPSRC
, Var_Value(TARGET
, gn
, &p1
), gn
, 0);
1261 } else if (Dir_MTime(gn
, 0) == 0 && (gn
->type
& OP_SPECIAL
) == 0) {
1263 * The node wasn't the target of an operator we have no .DEFAULT
1264 * rule to go on and the target doesn't already exist. There's
1265 * nothing more we can do for this branch. If the -k flag wasn't
1266 * given, we stop in our tracks, otherwise we just don't update
1267 * this node's parents so they never get examined.
1269 static const char msg
[] = ": don't know how to make";
1271 if (gn
->flags
& FROM_DEPEND
) {
1272 if (!Job_RunTarget(".STALE", gn
->fname
))
1273 fprintf(stdout
, "%s: %s, %d: ignoring stale %s for %s\n",
1274 progname
, gn
->fname
, gn
->lineno
, makeDependfile
,
1279 if (gn
->type
& OP_OPTIONAL
) {
1280 (void)fprintf(stdout
, "%s%s %s (ignored)\n", progname
,
1282 (void)fflush(stdout
);
1283 } else if (keepgoing
) {
1284 (void)fprintf(stdout
, "%s%s %s (continuing)\n", progname
,
1286 (void)fflush(stdout
);
1289 (*abortProc
)("%s%s %s. Stop", progname
, msg
, gn
->name
);
1298 *-----------------------------------------------------------------------
1300 * Execute the shell for the given job. Called from JobStart
1303 * job Job to execute
1309 * A shell is executed, outputs is altered and the Job structure added
1312 *-----------------------------------------------------------------------
1315 JobExec(Job
*job
, char **argv
)
1317 int cpid
; /* ID of new child */
1320 job
->flags
&= ~JOB_TRACED
;
1325 (void)fprintf(debug_file
, "Running %s %sly\n", job
->node
->name
, "local");
1326 (void)fprintf(debug_file
, "\tCommand: ");
1327 for (i
= 0; argv
[i
] != NULL
; i
++) {
1328 (void)fprintf(debug_file
, "%s ", argv
[i
]);
1330 (void)fprintf(debug_file
, "\n");
1334 * Some jobs produce no output and it's disconcerting to have
1335 * no feedback of their running (since they produce no output, the
1336 * banner with their name in it never appears). This is an attempt to
1337 * provide that feedback, even if nothing follows it.
1339 if ((lastNode
!= job
->node
) && !(job
->flags
& JOB_SILENT
)) {
1340 MESSAGE(stdout
, job
->node
);
1341 lastNode
= job
->node
;
1344 /* No interruptions until this job is on the `jobs' list */
1347 /* Pre-emptively mark job running, pid still zero though */
1348 job
->job_state
= JOB_ST_RUNNING
;
1352 Punt("Cannot vfork: %s", strerror(errno
));
1360 meta_job_child(job
);
1364 * Reset all signal handlers; this is necessary because we also
1365 * need to unblock signals before we exec(2).
1369 /* Now unblock signals */
1370 sigemptyset(&tmask
);
1371 JobSigUnlock(&tmask
);
1374 * Must duplicate the input stream down to the child's input and
1375 * reset it to the beginning (again). Since the stream was marked
1376 * close-on-exec, we must clear that bit in the new input.
1378 if (dup2(FILENO(job
->cmdFILE
), 0) == -1) {
1379 execError("dup2", "job->cmdFILE");
1382 (void)fcntl(0, F_SETFD
, 0);
1383 (void)lseek(0, (off_t
)0, SEEK_SET
);
1385 if (job
->node
->type
& (OP_MAKE
| OP_SUBMAKE
)) {
1387 * Pass job token pipe to submakes.
1389 fcntl(tokenWaitJob
.inPipe
, F_SETFD
, 0);
1390 fcntl(tokenWaitJob
.outPipe
, F_SETFD
, 0);
1394 * Set up the child's output to be routed through the pipe
1395 * we've created for it.
1397 if (dup2(job
->outPipe
, 1) == -1) {
1398 execError("dup2", "job->outPipe");
1402 * The output channels are marked close on exec. This bit was
1403 * duplicated by the dup2(on some systems), so we have to clear
1404 * it before routing the shell's error output to the same place as
1405 * its standard output.
1407 (void)fcntl(1, F_SETFD
, 0);
1408 if (dup2(1, 2) == -1) {
1409 execError("dup2", "1, 2");
1414 * We want to switch the child into a different process family so
1415 * we can kill it and all its descendants in one fell swoop,
1416 * by killing its process family, but not commit suicide.
1418 #if defined(HAVE_SETPGID)
1419 (void)setpgid(0, getpid());
1421 #if defined(HAVE_SETSID)
1422 /* XXX: dsl - I'm sure this should be setpgrp()... */
1425 (void)setpgrp(0, getpid());
1431 (void)execv(shellPath
, argv
);
1432 execError("exec", shellPath
);
1436 /* Parent, continuing after the child exec */
1439 Trace_Log(JOBSTART
, job
);
1442 * Set the current position in the buffer to the beginning
1443 * and mark another stream to watch in the outputs mask
1449 if (job
->cmdFILE
!= NULL
&& job
->cmdFILE
!= stdout
) {
1450 (void)fclose(job
->cmdFILE
);
1451 job
->cmdFILE
= NULL
;
1455 * Now the job is actually running, add it to the table.
1458 fprintf(debug_file
, "JobExec(%s): pid %d added to jobs table\n",
1459 job
->node
->name
, job
->pid
);
1460 job_table_dump("job started");
1462 JobSigUnlock(&mask
);
1466 *-----------------------------------------------------------------------
1468 * Create the argv needed to execute the shell for a given job.
1475 *-----------------------------------------------------------------------
1478 JobMakeArgv(Job
*job
, char **argv
)
1481 static char args
[10]; /* For merged arguments */
1483 argv
[0] = UNCONST(shellName
);
1486 if ((commandShell
->exit
&& (*commandShell
->exit
!= '-')) ||
1487 (commandShell
->echo
&& (*commandShell
->echo
!= '-')))
1490 * At least one of the flags doesn't have a minus before it, so
1491 * merge them together. Have to do this because the *(&(@*#*&#$#
1492 * Bourne shell thinks its second argument is a file to source.
1493 * Grrrr. Note the ten-character limitation on the combined arguments.
1495 (void)snprintf(args
, sizeof(args
), "-%s%s",
1496 ((job
->flags
& JOB_IGNERR
) ? "" :
1497 (commandShell
->exit
? commandShell
->exit
: "")),
1498 ((job
->flags
& JOB_SILENT
) ? "" :
1499 (commandShell
->echo
? commandShell
->echo
: "")));
1506 if (!(job
->flags
& JOB_IGNERR
) && commandShell
->exit
) {
1507 argv
[argc
] = UNCONST(commandShell
->exit
);
1510 if (!(job
->flags
& JOB_SILENT
) && commandShell
->echo
) {
1511 argv
[argc
] = UNCONST(commandShell
->echo
);
1519 *-----------------------------------------------------------------------
1521 * Start a target-creation process going for the target described
1522 * by the graph node gn.
1525 * gn target to create
1526 * flags flags for the job to override normal ones.
1527 * e.g. JOB_SPECIAL or JOB_IGNDOTS
1528 * previous The previous Job structure for this node, if any.
1531 * JOB_ERROR if there was an error in the commands, JOB_FINISHED
1532 * if there isn't actually anything left to do for the job and
1533 * JOB_RUNNING if the job has been started.
1536 * A new Job node is created and added to the list of running
1537 * jobs. PMake is forked and a child shell created.
1539 * NB: I'm fairly sure that this code is never called with JOB_SPECIAL set
1540 * JOB_IGNDOTS is never set (dsl)
1541 * Also the return value is ignored by everyone.
1542 *-----------------------------------------------------------------------
1545 JobStart(GNode
*gn
, int flags
)
1547 Job
*job
; /* new job descriptor */
1548 char *argv
[10]; /* Argument vector to shell */
1549 Boolean cmdsOK
; /* true if the nodes commands were all right */
1550 Boolean noExec
; /* Set true if we decide not to run the job */
1551 int tfd
; /* File descriptor to the temp file */
1553 for (job
= job_table
; job
< job_table_end
; job
++) {
1554 if (job
->job_state
== JOB_ST_FREE
)
1557 if (job
>= job_table_end
)
1558 Punt("JobStart no job slots vacant");
1560 memset(job
, 0, sizeof *job
);
1561 job
->job_state
= JOB_ST_SETUP
;
1562 if (gn
->type
& OP_SPECIAL
)
1563 flags
|= JOB_SPECIAL
;
1566 job
->tailCmds
= NULL
;
1569 * Set the initial value of the flags for this job based on the global
1570 * ones and the node's attributes... Any flags supplied by the caller
1571 * are also added to the field.
1574 if (Targ_Ignore(gn
)) {
1575 job
->flags
|= JOB_IGNERR
;
1577 if (Targ_Silent(gn
)) {
1578 job
->flags
|= JOB_SILENT
;
1580 job
->flags
|= flags
;
1583 * Check the commands now so any attributes from .DEFAULT have a chance
1584 * to migrate to the node
1586 cmdsOK
= Job_CheckCommands(gn
, Error
);
1588 job
->inPollfd
= NULL
;
1590 * If the -n flag wasn't given, we open up OUR (not the child's)
1591 * temporary file to stuff commands in it. The thing is rd/wr so we don't
1592 * need to reopen it to feed it to the shell. If the -n flag *was* given,
1593 * we just set the file to be stdout. Cute, huh?
1595 if (((gn
->type
& OP_MAKE
) && !(noRecursiveExecute
)) ||
1596 (!noExecute
&& !touchFlag
)) {
1598 * tfile is the name of a file into which all shell commands are
1599 * put. It is removed before the child shell is executed, unless
1600 * DEBUG(SCRIPT) is set.
1605 * We're serious here, but if the commands were bogus, we're
1609 PrintOnError(gn
, NULL
); /* provide some clue */
1614 tfd
= mkTempFile(TMPPAT
, &tfile
);
1616 (void)eunlink(tfile
);
1617 JobSigUnlock(&mask
);
1619 job
->cmdFILE
= fdopen(tfd
, "w+");
1620 if (job
->cmdFILE
== NULL
) {
1621 Punt("Could not fdopen %s", tfile
);
1623 (void)fcntl(FILENO(job
->cmdFILE
), F_SETFD
, FD_CLOEXEC
);
1625 * Send the commands to the command file, flush all its buffers then
1626 * rewind and remove the thing.
1632 meta_job_start(job
, gn
);
1633 if (Targ_Silent(gn
)) { /* might have changed */
1634 job
->flags
|= JOB_SILENT
;
1639 * We can do all the commands at once. hooray for sanity
1642 Lst_ForEach(gn
->commands
, JobPrintCommand
, job
);
1645 * If we didn't print out any commands to the shell script,
1646 * there's not much point in executing the shell, is there?
1648 if (numCommands
== 0) {
1653 } else if (NoExecute(gn
)) {
1655 * Not executing anything -- just print all the commands to stdout
1656 * in one fell swoop. This will still set up job->tailCmds correctly.
1658 if (lastNode
!= gn
) {
1659 MESSAGE(stdout
, gn
);
1662 job
->cmdFILE
= stdout
;
1664 * Only print the commands if they're ok, but don't die if they're
1665 * not -- just let the user know they're bad and keep going. It
1666 * doesn't do any harm in this case and may do some good.
1669 Lst_ForEach(gn
->commands
, JobPrintCommand
, job
);
1672 * Don't execute the shell, thank you.
1677 * Just touch the target and note that no shell should be executed.
1678 * Set cmdFILE to stdout to make life easier. Check the commands, too,
1679 * but don't die if they're no good -- it does no harm to keep working
1682 job
->cmdFILE
= stdout
;
1683 Job_Touch(gn
, job
->flags
&JOB_SILENT
);
1686 /* Just in case it isn't already... */
1687 (void)fflush(job
->cmdFILE
);
1690 * If we're not supposed to execute a shell, don't.
1693 if (!(job
->flags
& JOB_SPECIAL
))
1696 * Unlink and close the command file if we opened one
1698 if (job
->cmdFILE
!= stdout
) {
1699 if (job
->cmdFILE
!= NULL
) {
1700 (void)fclose(job
->cmdFILE
);
1701 job
->cmdFILE
= NULL
;
1706 * We only want to work our way up the graph if we aren't here because
1707 * the commands for the job were no good.
1709 if (cmdsOK
&& aborting
== 0) {
1710 if (job
->tailCmds
!= NULL
) {
1711 Lst_ForEachFrom(job
->node
->commands
, job
->tailCmds
,
1715 job
->node
->made
= MADE
;
1716 Make_Update(job
->node
);
1718 job
->job_state
= JOB_ST_FREE
;
1719 return cmdsOK
? JOB_FINISHED
: JOB_ERROR
;
1723 * Set up the control arguments to the shell. This is based on the flags
1724 * set earlier for this job.
1726 JobMakeArgv(job
, argv
);
1728 /* Create the pipe by which we'll get the shell's output. */
1729 JobCreatePipe(job
, 3);
1732 return(JOB_RUNNING
);
1736 JobOutput(Job
*job
, char *cp
, char *endp
, int msg
)
1740 if (commandShell
->noPrint
) {
1741 ecp
= Str_FindSubstring(cp
, commandShell
->noPrint
);
1742 while (ecp
!= NULL
) {
1745 if (!beSilent
&& msg
&& job
->node
!= lastNode
) {
1746 MESSAGE(stdout
, job
->node
);
1747 lastNode
= job
->node
;
1750 * The only way there wouldn't be a newline after
1751 * this line is if it were the last in the buffer.
1752 * however, since the non-printable comes after it,
1753 * there must be a newline, so we don't print one.
1755 (void)fprintf(stdout
, "%s", cp
);
1756 (void)fflush(stdout
);
1758 cp
= ecp
+ commandShell
->noPLen
;
1761 * Still more to print, look again after skipping
1762 * the whitespace following the non-printable
1766 while (*cp
== ' ' || *cp
== '\t' || *cp
== '\n') {
1769 ecp
= Str_FindSubstring(cp
, commandShell
->noPrint
);
1779 *-----------------------------------------------------------------------
1781 * This function is called at different times depending on
1782 * whether the user has specified that output is to be collected
1783 * via pipes or temporary files. In the former case, we are called
1784 * whenever there is something to read on the pipe. We collect more
1785 * output from the given job and store it in the job's outBuf. If
1786 * this makes up a line, we print it tagged by the job's identifier,
1788 * If output has been collected in a temporary file, we open the
1789 * file and read it line by line, transfering it to our own
1790 * output channel until the file is empty. At which point we
1791 * remove the temporary file.
1792 * In both cases, however, we keep our figurative eye out for the
1793 * 'noPrint' line for the shell from which the output came. If
1794 * we recognize a line, we don't print it. If the command is not
1795 * alone on the line (the character after it is not \0 or \n), we
1796 * do print whatever follows it.
1799 * job the job whose output needs printing
1800 * finish TRUE if this is the last time we'll be called
1807 * curPos may be shifted as may the contents of outBuf.
1808 *-----------------------------------------------------------------------
1811 JobDoOutput(Job
*job
, Boolean finish
)
1813 Boolean gotNL
= FALSE
; /* true if got a newline */
1814 Boolean fbuf
; /* true if our buffer filled up */
1815 int nr
; /* number of bytes read */
1816 int i
; /* auxiliary index into outBuf */
1817 int max
; /* limit for i (end of current data) */
1818 int nRead
; /* (Temporary) number of bytes read */
1821 * Read as many bytes as will fit in the buffer.
1827 nRead
= read(job
->inPipe
, &job
->outBuf
[job
->curPos
],
1828 JOB_BUFSIZE
- job
->curPos
);
1830 if (errno
== EAGAIN
)
1833 perror("JobDoOutput(piperead)");
1841 * If we hit the end-of-file (the job is dead), we must flush its
1842 * remaining output, so pretend we read a newline if there's any
1843 * output remaining in the buffer.
1844 * Also clear the 'finish' flag so we stop looping.
1846 if ((nr
== 0) && (job
->curPos
!= 0)) {
1847 job
->outBuf
[job
->curPos
] = '\n';
1850 } else if (nr
== 0) {
1855 * Look for the last newline in the bytes we just got. If there is
1856 * one, break out of the loop with 'i' as its index and gotNL set
1859 max
= job
->curPos
+ nr
;
1860 for (i
= job
->curPos
+ nr
- 1; i
>= job
->curPos
; i
--) {
1861 if (job
->outBuf
[i
] == '\n') {
1864 } else if (job
->outBuf
[i
] == '\0') {
1868 job
->outBuf
[i
] = ' ';
1874 if (job
->curPos
== JOB_BUFSIZE
) {
1876 * If we've run out of buffer space, we have no choice
1877 * but to print the stuff. sigh.
1883 if (gotNL
|| fbuf
) {
1885 * Need to send the output to the screen. Null terminate it
1886 * first, overwriting the newline character if there was one.
1887 * So long as the line isn't one we should filter (according
1888 * to the shell description), we print the line, preceded
1889 * by a target banner if this target isn't the same as the
1890 * one for which we last printed something.
1891 * The rest of the data in the buffer are then shifted down
1892 * to the start of the buffer and curPos is set accordingly.
1894 job
->outBuf
[i
] = '\0';
1895 if (i
>= job
->curPos
) {
1898 cp
= JobOutput(job
, job
->outBuf
, &job
->outBuf
[i
], FALSE
);
1901 * There's still more in that thar buffer. This time, though,
1902 * we know there's no newline at the end, so we add one of
1903 * our own free will.
1906 if (!beSilent
&& job
->node
!= lastNode
) {
1907 MESSAGE(stdout
, job
->node
);
1908 lastNode
= job
->node
;
1912 meta_job_output(job
, cp
, gotNL
? "\n" : "");
1915 (void)fprintf(stdout
, "%s%s", cp
, gotNL
? "\n" : "");
1916 (void)fflush(stdout
);
1920 * max is the last offset still in the buffer. Move any remaining
1921 * characters to the start of the buffer and update the end marker
1925 (void)memmove(job
->outBuf
, &job
->outBuf
[i
+ 1], max
- (i
+ 1));
1926 job
->curPos
= max
- (i
+ 1);
1934 * If the finish flag is true, we must loop until we hit
1935 * end-of-file on the pipe. This is guaranteed to happen
1936 * eventually since the other end of the pipe is now closed
1937 * (we closed it explicitly and the child has exited). When
1938 * we do get an EOF, finish will be set FALSE and we'll fall
1950 * Unfortunately it is too complicated to run .BEGIN, .END,
1951 * and .INTERRUPT job in the parallel job module. This has
1952 * the nice side effect that it avoids a lot of other problems.
1954 Lst lst
= Lst_Init(FALSE
);
1955 Lst_AtEnd(lst
, targ
);
1956 (void)Make_Run(lst
);
1957 Lst_Destroy(lst
, NULL
);
1958 JobStart(targ
, JOB_SPECIAL
);
1959 while (jobTokensRunning
) {
1963 Compat_Make(targ
, targ
);
1964 if (targ
->made
== ERROR
) {
1965 PrintOnError(targ
, "\n\nStop.");
1972 *-----------------------------------------------------------------------
1973 * Job_CatchChildren --
1974 * Handle the exit of a child. Called from Make_Make.
1977 * block TRUE if should block on the wait
1983 * The job descriptor is removed from the list of children.
1986 * We do waits, blocking or not, according to the wisdom of our
1987 * caller, until there are no more children to report. For each
1988 * job, call JobFinish to finish things off.
1990 *-----------------------------------------------------------------------
1994 Job_CatchChildren(void)
1996 int pid
; /* pid of dead child */
1997 WAIT_T status
; /* Exit/termination status */
2000 * Don't even bother if we know there's no one around.
2002 if (jobTokensRunning
== 0)
2005 while ((pid
= waitpid((pid_t
) -1, &status
, WNOHANG
| WUNTRACED
)) > 0) {
2007 (void)fprintf(debug_file
, "Process %d exited/stopped status %x.\n", pid
,
2008 WAIT_STATUS(status
));
2010 JobReapChild(pid
, status
, TRUE
);
2015 * It is possible that wait[pid]() was called from elsewhere,
2016 * this lets us reap jobs regardless.
2019 JobReapChild(pid_t pid
, WAIT_T status
, Boolean isJobs
)
2021 Job
*job
; /* job descriptor for dead child */
2024 * Don't even bother if we know there's no one around.
2026 if (jobTokensRunning
== 0)
2029 job
= JobFindPid(pid
, JOB_ST_RUNNING
, isJobs
);
2032 if (!lurking_children
)
2033 Error("Child (%d) status %x not in table?", pid
, status
);
2035 return; /* not ours */
2037 if (WIFSTOPPED(status
)) {
2039 (void)fprintf(debug_file
, "Process %d (%s) stopped.\n",
2040 job
->pid
, job
->node
->name
);
2042 if (!make_suspended
) {
2043 switch (WSTOPSIG(status
)) {
2045 (void)printf("*** [%s] Suspended\n", job
->node
->name
);
2048 (void)printf("*** [%s] Stopped\n", job
->node
->name
);
2051 (void)printf("*** [%s] Stopped -- signal %d\n",
2052 job
->node
->name
, WSTOPSIG(status
));
2054 job
->job_suspended
= 1;
2056 (void)fflush(stdout
);
2060 job
->job_state
= JOB_ST_FINISHED
;
2061 job
->exit_status
= WAIT_STATUS(status
);
2063 JobFinish(job
, status
);
2067 *-----------------------------------------------------------------------
2068 * Job_CatchOutput --
2069 * Catch the output from our children, if we're using
2070 * pipes do so. Otherwise just block time until we get a
2071 * signal(most likely a SIGCHLD) since there's no point in
2072 * just spinning when there's nothing to do and the reaping
2073 * of a child can wait for a while.
2079 * Output is read from pipes if we're piping.
2080 * -----------------------------------------------------------------------
2083 Job_CatchOutput(void)
2089 (void)fflush(stdout
);
2091 /* The first fd in the list is the job token pipe */
2093 nready
= poll(fds
+ 1 - wantToken
, nfds
- 1 + wantToken
, POLL_MSEC
);
2094 } while (nready
< 0 && errno
== EINTR
);
2097 Punt("poll: %s", strerror(errno
));
2099 if (nready
> 0 && readyfd(&childExitJob
)) {
2102 count
= read(childExitJob
.inPipe
, &token
, 1);
2105 Punt("unexpected eof on token pipe");
2107 Punt("token pipe read: %s", strerror(errno
));
2109 if (token
== DO_JOB_RESUME
[0])
2110 /* Complete relay requested from our SIGCONT handler */
2119 Job_CatchChildren();
2123 for (i
= 2; i
< nfds
; i
++) {
2124 if (!fds
[i
].revents
)
2127 if (job
->job_state
== JOB_ST_RUNNING
)
2128 JobDoOutput(job
, FALSE
);
2135 *-----------------------------------------------------------------------
2137 * Start the creation of a target. Basically a front-end for
2138 * JobStart used by the Make module.
2144 * Another job is started.
2146 *-----------------------------------------------------------------------
2151 (void)JobStart(gn
, 0);
2157 if (shellPath
== NULL
) {
2159 * We are using the default shell, which may be an absolute
2160 * path if DEFSHELL_CUSTOM is defined.
2162 shellName
= commandShell
->name
;
2163 #ifdef DEFSHELL_CUSTOM
2164 if (*shellName
== '/') {
2165 shellPath
= shellName
;
2166 shellName
= strrchr(shellPath
, '/');
2170 shellPath
= str_concat(_PATH_DEFSHELLDIR
, shellName
, STR_ADDSLASH
);
2172 if (commandShell
->exit
== NULL
) {
2173 commandShell
->exit
= "";
2175 if (commandShell
->echo
== NULL
) {
2176 commandShell
->echo
= "";
2178 if (commandShell
->hasErrCtl
&& *commandShell
->exit
) {
2180 strcmp(commandShell
->exit
, &shellErrFlag
[1]) != 0) {
2182 shellErrFlag
= NULL
;
2184 if (!shellErrFlag
) {
2185 int n
= strlen(commandShell
->exit
) + 2;
2187 shellErrFlag
= bmake_malloc(n
);
2189 snprintf(shellErrFlag
, n
, "-%s", commandShell
->exit
);
2192 } else if (shellErrFlag
) {
2194 shellErrFlag
= NULL
;
2199 * Returns the string literal that is used in the current command shell
2200 * to produce a newline character.
2203 Shell_GetNewline(void)
2206 return commandShell
->newline
;
2215 } else if (!Var_Exists(MAKE_JOB_PREFIX
, VAR_GLOBAL
)) {
2216 Var_Set(MAKE_JOB_PREFIX
, "---", VAR_GLOBAL
, 0);
2219 targPrefix
= Var_Subst(NULL
, "${" MAKE_JOB_PREFIX
"}",
2220 VAR_GLOBAL
, VARF_WANTRES
);
2224 *-----------------------------------------------------------------------
2226 * Initialize the process module
2234 * lists and counters are initialized
2235 *-----------------------------------------------------------------------
2241 /* Allocate space for all the job info */
2242 job_table
= bmake_malloc(maxJobs
* sizeof *job_table
);
2243 memset(job_table
, 0, maxJobs
* sizeof *job_table
);
2244 job_table_end
= job_table
+ maxJobs
;
2253 * There is a non-zero chance that we already have children.
2254 * eg after 'make -f- <<EOF'
2255 * Since their termination causes a 'Child (pid) not in table' message,
2256 * Collect the status of any that are already dead, and suppress the
2257 * error message if there are any undead ones.
2261 rval
= waitpid((pid_t
) -1, &status
, WNOHANG
);
2265 lurking_children
= 1;
2271 JobCreatePipe(&childExitJob
, 3);
2273 /* We can only need to wait for tokens, children and output from each job */
2274 fds
= bmake_malloc(sizeof (*fds
) * (2 + maxJobs
));
2275 jobfds
= bmake_malloc(sizeof (*jobfds
) * (2 + maxJobs
));
2277 /* These are permanent entries and take slots 0 and 1 */
2278 watchfd(&tokenWaitJob
);
2279 watchfd(&childExitJob
);
2281 sigemptyset(&caught_signals
);
2283 * Install a SIGCHLD handler.
2285 (void)bmake_signal(SIGCHLD
, JobChildSig
);
2286 sigaddset(&caught_signals
, SIGCHLD
);
2288 #define ADDSIG(s,h) \
2289 if (bmake_signal(s, SIG_IGN) != SIG_IGN) { \
2290 sigaddset(&caught_signals, s); \
2291 (void)bmake_signal(s, h); \
2295 * Catch the four signals that POSIX specifies if they aren't ignored.
2296 * JobPassSig will take care of calling JobInterrupt if appropriate.
2298 ADDSIG(SIGINT
, JobPassSig_int
)
2299 ADDSIG(SIGHUP
, JobPassSig_term
)
2300 ADDSIG(SIGTERM
, JobPassSig_term
)
2301 ADDSIG(SIGQUIT
, JobPassSig_term
)
2304 * There are additional signals that need to be caught and passed if
2305 * either the export system wants to be told directly of signals or if
2306 * we're giving each job its own process group (since then it won't get
2307 * signals from the terminal driver as we own the terminal)
2309 ADDSIG(SIGTSTP
, JobPassSig_suspend
)
2310 ADDSIG(SIGTTOU
, JobPassSig_suspend
)
2311 ADDSIG(SIGTTIN
, JobPassSig_suspend
)
2312 ADDSIG(SIGWINCH
, JobCondPassSig
)
2313 ADDSIG(SIGCONT
, JobContinueSig
)
2316 (void)Job_RunTarget(".BEGIN", NULL
);
2317 postCommands
= Targ_FindNode(".END", TARG_CREATE
);
2320 static void JobSigReset(void)
2323 if (sigismember(&caught_signals, s)) { \
2324 (void)bmake_signal(s, SIG_DFL); \
2337 (void)bmake_signal(SIGCHLD
, SIG_DFL
);
2341 *-----------------------------------------------------------------------
2343 * Find a shell in 'shells' given its name.
2346 * A pointer to the Shell structure.
2351 *-----------------------------------------------------------------------
2354 JobMatchShell(const char *name
)
2358 for (sh
= shells
; sh
->name
!= NULL
; sh
++) {
2359 if (strcmp(name
, sh
->name
) == 0)
2366 *-----------------------------------------------------------------------
2368 * Parse a shell specification and set up commandShell, shellPath
2369 * and shellName appropriately.
2372 * line The shell spec
2375 * FAILURE if the specification was incorrect.
2378 * commandShell points to a Shell structure (either predefined or
2379 * created from the shell spec), shellPath is the full path of the
2380 * shell described by commandShell, while shellName is just the
2381 * final component of shellPath.
2384 * A shell specification consists of a .SHELL target, with dependency
2385 * operator, followed by a series of blank-separated words. Double
2386 * quotes can be used to use blanks in words. A backslash escapes
2387 * anything (most notably a double-quote and a space) and
2388 * provides the functionality it does in C. Each word consists of
2389 * keyword and value separated by an equal sign. There should be no
2390 * unnecessary spaces in the word. The keywords are as follows:
2391 * name Name of shell.
2392 * path Location of shell.
2393 * quiet Command to turn off echoing.
2394 * echo Command to turn echoing on
2395 * filter Result of turning off echoing that shouldn't be
2397 * echoFlag Flag to turn echoing on at the start
2398 * errFlag Flag to turn error checking on at the start
2399 * hasErrCtl True if shell has error checking control
2400 * newline String literal to represent a newline char
2401 * check Command to turn on error checking if hasErrCtl
2402 * is TRUE or template of command to echo a command
2403 * for which error checking is off if hasErrCtl is
2405 * ignore Command to turn off error checking if hasErrCtl
2406 * is TRUE or template of command to execute a
2407 * command so as to ignore any errors it returns if
2408 * hasErrCtl is FALSE.
2410 *-----------------------------------------------------------------------
2413 Job_ParseShell(char *line
)
2420 Boolean fullSpec
= FALSE
;
2423 while (isspace((unsigned char)*line
)) {
2427 free(UNCONST(shellArgv
));
2429 memset(&newShell
, 0, sizeof(newShell
));
2432 * Parse the specification by keyword
2434 words
= brk_string(line
, &argc
, TRUE
, &path
);
2435 if (words
== NULL
) {
2436 Error("Unterminated quoted string [%s]", line
);
2441 for (path
= NULL
, argv
= words
; argc
!= 0; argc
--, argv
++) {
2442 if (strncmp(*argv
, "path=", 5) == 0) {
2444 } else if (strncmp(*argv
, "name=", 5) == 0) {
2445 newShell
.name
= &argv
[0][5];
2447 if (strncmp(*argv
, "quiet=", 6) == 0) {
2448 newShell
.echoOff
= &argv
[0][6];
2449 } else if (strncmp(*argv
, "echo=", 5) == 0) {
2450 newShell
.echoOn
= &argv
[0][5];
2451 } else if (strncmp(*argv
, "filter=", 7) == 0) {
2452 newShell
.noPrint
= &argv
[0][7];
2453 newShell
.noPLen
= strlen(newShell
.noPrint
);
2454 } else if (strncmp(*argv
, "echoFlag=", 9) == 0) {
2455 newShell
.echo
= &argv
[0][9];
2456 } else if (strncmp(*argv
, "errFlag=", 8) == 0) {
2457 newShell
.exit
= &argv
[0][8];
2458 } else if (strncmp(*argv
, "hasErrCtl=", 10) == 0) {
2459 char c
= argv
[0][10];
2460 newShell
.hasErrCtl
= !((c
!= 'Y') && (c
!= 'y') &&
2461 (c
!= 'T') && (c
!= 't'));
2462 } else if (strncmp(*argv
, "newline=", 8) == 0) {
2463 newShell
.newline
= &argv
[0][8];
2464 } else if (strncmp(*argv
, "check=", 6) == 0) {
2465 newShell
.errCheck
= &argv
[0][6];
2466 } else if (strncmp(*argv
, "ignore=", 7) == 0) {
2467 newShell
.ignErr
= &argv
[0][7];
2468 } else if (strncmp(*argv
, "errout=", 7) == 0) {
2469 newShell
.errOut
= &argv
[0][7];
2470 } else if (strncmp(*argv
, "comment=", 8) == 0) {
2471 newShell
.commentChar
= argv
[0][8];
2473 Parse_Error(PARSE_FATAL
, "Unknown keyword \"%s\"",
2484 * If no path was given, the user wants one of the pre-defined shells,
2485 * yes? So we find the one s/he wants with the help of JobMatchShell
2486 * and set things up the right way. shellPath will be set up by
2489 if (newShell
.name
== NULL
) {
2490 Parse_Error(PARSE_FATAL
, "Neither path nor name specified");
2494 if ((sh
= JobMatchShell(newShell
.name
)) == NULL
) {
2495 Parse_Error(PARSE_WARNING
, "%s: No matching shell",
2501 shellName
= newShell
.name
;
2503 /* Shell_Init has already been called! Do it again. */
2504 free(UNCONST(shellPath
));
2511 * The user provided a path. If s/he gave nothing else (fullSpec is
2512 * FALSE), try and find a matching shell in the ones we know of.
2513 * Else we just take the specification at its word and copy it
2514 * to a new location. In either case, we need to record the
2515 * path the user gave for the shell.
2518 path
= strrchr(path
, '/');
2520 path
= UNCONST(shellPath
);
2524 if (newShell
.name
!= NULL
) {
2525 shellName
= newShell
.name
;
2530 if ((sh
= JobMatchShell(shellName
)) == NULL
) {
2531 Parse_Error(PARSE_WARNING
, "%s: No matching shell",
2538 commandShell
= bmake_malloc(sizeof(Shell
));
2539 *commandShell
= newShell
;
2541 /* this will take care of shellErrFlag */
2545 if (commandShell
->echoOn
&& commandShell
->echoOff
) {
2546 commandShell
->hasEchoCtl
= TRUE
;
2549 if (!commandShell
->hasErrCtl
) {
2550 if (commandShell
->errCheck
== NULL
) {
2551 commandShell
->errCheck
= "";
2553 if (commandShell
->ignErr
== NULL
) {
2554 commandShell
->ignErr
= "%s\n";
2559 * Do not free up the words themselves, since they might be in use by the
2560 * shell specification.
2567 *-----------------------------------------------------------------------
2569 * Handle the receipt of an interrupt.
2572 * runINTERRUPT Non-zero if commands for the .INTERRUPT target
2573 * should be executed
2574 * signo signal received
2580 * All children are killed. Another job will be started if the
2581 * .INTERRUPT target was given.
2582 *-----------------------------------------------------------------------
2585 JobInterrupt(int runINTERRUPT
, int signo
)
2587 Job
*job
; /* job descriptor in that element */
2588 GNode
*interrupt
; /* the node describing the .INTERRUPT target */
2592 aborting
= ABORT_INTERRUPT
;
2596 for (job
= job_table
; job
< job_table_end
; job
++) {
2597 if (job
->job_state
!= JOB_ST_RUNNING
)
2602 JobDeleteTarget(gn
);
2605 (void)fprintf(debug_file
,
2606 "JobInterrupt passing signal %d to child %d.\n",
2609 KILLPG(job
->pid
, signo
);
2613 JobSigUnlock(&mask
);
2615 if (runINTERRUPT
&& !touchFlag
) {
2616 interrupt
= Targ_FindNode(".INTERRUPT", TARG_NOCREATE
);
2617 if (interrupt
!= NULL
) {
2618 ignoreErrors
= FALSE
;
2622 Trace_Log(MAKEINTR
, 0);
2627 *-----------------------------------------------------------------------
2629 * Do final processing such as the running of the commands
2630 * attached to the .END target.
2633 * Number of errors reported.
2637 *-----------------------------------------------------------------------
2642 if (postCommands
!= NULL
&&
2643 (!Lst_IsEmpty(postCommands
->commands
) ||
2644 !Lst_IsEmpty(postCommands
->children
))) {
2646 Error("Errors reported so .END ignored");
2648 JobRun(postCommands
);
2655 *-----------------------------------------------------------------------
2657 * Cleanup any memory used by the jobs module
2664 *-----------------------------------------------------------------------
2675 *-----------------------------------------------------------------------
2677 * Waits for all running jobs to finish and returns. Sets 'aborting'
2678 * to ABORT_WAIT to prevent other jobs from starting.
2684 * Currently running jobs finish.
2686 *-----------------------------------------------------------------------
2691 aborting
= ABORT_WAIT
;
2692 while (jobTokensRunning
!= 0) {
2699 *-----------------------------------------------------------------------
2701 * Abort all currently running jobs without handling output or anything.
2702 * This function is to be called only in the event of a major
2703 * error. Most definitely NOT to be called from JobInterrupt.
2709 * All children are killed, not just the firstborn
2710 *-----------------------------------------------------------------------
2715 Job
*job
; /* the job descriptor in that element */
2718 aborting
= ABORT_ERROR
;
2720 if (jobTokensRunning
) {
2721 for (job
= job_table
; job
< job_table_end
; job
++) {
2722 if (job
->job_state
!= JOB_ST_RUNNING
)
2725 * kill the child process with increasingly drastic signals to make
2726 * darn sure it's dead.
2728 KILLPG(job
->pid
, SIGINT
);
2729 KILLPG(job
->pid
, SIGKILL
);
2734 * Catch as many children as want to report in at first, then give up
2736 while (waitpid((pid_t
) -1, &foo
, WNOHANG
) > 0)
2742 *-----------------------------------------------------------------------
2744 * Tries to restart stopped jobs if there are slots available.
2745 * Called in process context in response to a SIGCONT.
2753 *-----------------------------------------------------------------------
2756 JobRestartJobs(void)
2760 for (job
= job_table
; job
< job_table_end
; job
++) {
2761 if (job
->job_state
== JOB_ST_RUNNING
&&
2762 (make_suspended
|| job
->job_suspended
)) {
2764 (void)fprintf(debug_file
, "Restarting stopped job pid %d.\n",
2767 if (job
->job_suspended
) {
2768 (void)printf("*** [%s] Continued\n", job
->node
->name
);
2769 (void)fflush(stdout
);
2771 job
->job_suspended
= 0;
2772 if (KILLPG(job
->pid
, SIGCONT
) != 0 && DEBUG(JOB
)) {
2773 fprintf(debug_file
, "Failed to send SIGCONT to %d\n", job
->pid
);
2776 if (job
->job_state
== JOB_ST_FINISHED
)
2777 /* Job exit deferred after calling waitpid() in a signal handler */
2778 JobFinish(job
, job
->exit_status
);
2786 if (job
->inPollfd
!= NULL
)
2787 Punt("Watching watched job");
2789 fds
[nfds
].fd
= job
->inPipe
;
2790 fds
[nfds
].events
= POLLIN
;
2792 job
->inPollfd
= &fds
[nfds
];
2800 if (job
->inPollfd
== NULL
)
2801 Punt("Unwatching unwatched job");
2802 i
= job
->inPollfd
- fds
;
2805 * Move last job in table into hole made by dead job.
2809 jobfds
[i
] = jobfds
[nfds
];
2810 jobfds
[i
]->inPollfd
= &fds
[i
];
2812 job
->inPollfd
= NULL
;
2818 if (job
->inPollfd
== NULL
)
2819 Punt("Polling unwatched job");
2820 return (job
->inPollfd
->revents
& POLLIN
) != 0;
2824 *-----------------------------------------------------------------------
2826 * Put a token into the job pipe so that some make process can start
2830 * Allows more build jobs to be spawned somewhere.
2832 *-----------------------------------------------------------------------
2838 char tok
= JOB_TOKENS
[aborting
], tok1
;
2840 /* If we are depositing an error token flush everything else */
2841 while (tok
!= '+' && read(tokenWaitJob
.inPipe
, &tok1
, 1) == 1)
2845 fprintf(debug_file
, "(%d) aborting %d, deposit token %c\n",
2846 getpid(), aborting
, JOB_TOKENS
[aborting
]);
2847 while (write(tokenWaitJob
.outPipe
, &tok
, 1) == -1 && errno
== EAGAIN
)
2852 *-----------------------------------------------------------------------
2853 * Job_ServerStartTokenAdd --
2854 * Prep the job token pipe in the root make process.
2856 *-----------------------------------------------------------------------
2860 Job_ServerStart(int max_tokens
, int jp_0
, int jp_1
)
2865 if (jp_0
>= 0 && jp_1
>= 0) {
2866 /* Pipe passed in from parent */
2867 tokenWaitJob
.inPipe
= jp_0
;
2868 tokenWaitJob
.outPipe
= jp_1
;
2869 (void)fcntl(jp_0
, F_SETFD
, FD_CLOEXEC
);
2870 (void)fcntl(jp_1
, F_SETFD
, FD_CLOEXEC
);
2874 JobCreatePipe(&tokenWaitJob
, 15);
2876 snprintf(jobarg
, sizeof(jobarg
), "%d,%d",
2877 tokenWaitJob
.inPipe
, tokenWaitJob
.outPipe
);
2879 Var_Append(MAKEFLAGS
, "-J", VAR_GLOBAL
);
2880 Var_Append(MAKEFLAGS
, jobarg
, VAR_GLOBAL
);
2883 * Preload the job pipe with one token per job, save the one
2884 * "extra" token for the primary job.
2886 * XXX should clip maxJobs against PIPE_BUF -- if max_tokens is
2887 * larger than the write buffer size of the pipe, we will
2890 for (i
= 1; i
< max_tokens
; i
++)
2895 *-----------------------------------------------------------------------
2896 * Job_TokenReturn --
2897 * Return a withdrawn token to the pool.
2899 *-----------------------------------------------------------------------
2903 Job_TokenReturn(void)
2906 if (jobTokensRunning
< 0)
2907 Punt("token botch");
2908 if (jobTokensRunning
|| JOB_TOKENS
[aborting
] != '+')
2913 *-----------------------------------------------------------------------
2914 * Job_TokenWithdraw --
2915 * Attempt to withdraw a token from the pool.
2918 * Returns TRUE if a token was withdrawn, and FALSE if the pool
2919 * is currently empty.
2922 * If pool is empty, set wantToken so that we wake up
2923 * when a token is released.
2925 *-----------------------------------------------------------------------
2930 Job_TokenWithdraw(void)
2937 fprintf(debug_file
, "Job_TokenWithdraw(%d): aborting %d, running %d\n",
2938 getpid(), aborting
, jobTokensRunning
);
2940 if (aborting
|| (jobTokensRunning
>= maxJobs
))
2943 count
= read(tokenWaitJob
.inPipe
, &tok
, 1);
2945 Fatal("eof on job pipe!");
2946 if (count
< 0 && jobTokensRunning
!= 0) {
2947 if (errno
!= EAGAIN
) {
2948 Fatal("job pipe read: %s", strerror(errno
));
2951 fprintf(debug_file
, "(%d) blocked for token\n", getpid());
2956 if (count
== 1 && tok
!= '+') {
2957 /* make being abvorted - remove any other job tokens */
2959 fprintf(debug_file
, "(%d) aborted by token %c\n", getpid(), tok
);
2960 while (read(tokenWaitJob
.inPipe
, &tok1
, 1) == 1)
2962 /* And put the stopper back */
2963 while (write(tokenWaitJob
.outPipe
, &tok
, 1) == -1 && errno
== EAGAIN
)
2965 Fatal("A failure has been detected in another branch of the parallel make");
2968 if (count
== 1 && jobTokensRunning
== 0)
2969 /* We didn't want the token really */
2970 while (write(tokenWaitJob
.outPipe
, &tok
, 1) == -1 && errno
== EAGAIN
)
2975 fprintf(debug_file
, "(%d) withdrew token\n", getpid());
2980 *-----------------------------------------------------------------------
2982 * Run the named target if found. If a filename is specified, then
2983 * set that to the sources.
2989 * exits if the target fails.
2991 *-----------------------------------------------------------------------
2994 Job_RunTarget(const char *target
, const char *fname
) {
2995 GNode
*gn
= Targ_FindNode(target
, TARG_NOCREATE
);
3001 Var_Set(ALLSRC
, fname
, gn
, 0);
3004 if (gn
->made
== ERROR
) {
3005 PrintOnError(gn
, "\n\nStop.");
3013 emul_poll(struct pollfd
*fd
, int nfd
, int timeout
)
3016 int i
, maxfd
, nselect
, npoll
;
3017 struct timeval tv
, *tvp
;
3024 for (i
= 0; i
< nfd
; i
++) {
3027 if (fd
[i
].events
& POLLIN
)
3028 FD_SET(fd
[i
].fd
, &rfds
);
3030 if (fd
[i
].events
& POLLOUT
)
3031 FD_SET(fd
[i
].fd
, &wfds
);
3033 if (fd
[i
].fd
> maxfd
)
3037 if (maxfd
>= FD_SETSIZE
) {
3038 Punt("Ran out of fd_set slots; "
3039 "recompile with a larger FD_SETSIZE.");
3045 usecs
= timeout
* 1000;
3046 tv
.tv_sec
= usecs
/ 1000000;
3047 tv
.tv_usec
= usecs
% 1000000;
3051 nselect
= select(maxfd
+ 1, &rfds
, &wfds
, 0, tvp
);
3057 for (i
= 0; i
< nfd
; i
++) {
3058 if (FD_ISSET(fd
[i
].fd
, &rfds
))
3059 fd
[i
].revents
|= POLLIN
;
3061 if (FD_ISSET(fd
[i
].fd
, &wfds
))
3062 fd
[i
].revents
|= POLLOUT
;
3070 #endif /* USE_SELECT */