2 * Copyright (c) 1988, 1989, 1990, 1993
3 * The Regents of the University of California. All rights reserved.
4 * Copyright (c) 1988, 1989 by Adam de Boor
5 * Copyright (c) 1989 by Berkeley Softworks
8 * This code is derived from software contributed to Berkeley by
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. All advertising materials mentioning features or use of this software
20 * must display the following acknowledgement:
21 * This product includes software developed by the University of
22 * California, Berkeley and its contributors.
23 * 4. Neither the name of the University nor the names of its contributors
24 * may be used to endorse or promote products derived from this software
25 * without specific prior written permission.
27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
30 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
39 * @(#)job.c 8.2 (Berkeley) 3/19/94
42 #include <sys/cdefs.h>
43 __FBSDID("$FreeBSD$");
47 * handle the creation etc. of our child processes.
50 * Job_Make Start the creation of the given target.
53 * Check for and handle the termination of any children.
54 * This must be called reasonably frequently to keep the
55 * whole make going at a decent clip, since job table
56 * entries aren't removed until their process is caught
57 * this way. Its single argument is TRUE if the function
58 * should block waiting for a child to terminate.
60 * Job_CatchOutput Print any output our children have produced. Should
61 * also be called fairly frequently to keep the user
62 * informed of what's going on. If no output is waiting,
63 * it will block for a time given by the SEL_* constants,
64 * below, or until output is ready.
66 * Job_Init Called to intialize this module. in addition, any
67 * commands attached to the .BEGIN target are executed
68 * before this function returns. Hence, the makefile must
69 * have been parsed before this function is called.
71 * Job_Full Return TRUE if the job table is filled.
73 * Job_Empty Return TRUE if the job table is completely empty.
75 * Job_Finish Perform any final processing which needs doing. This
76 * includes the execution of any commands which have
77 * been/were attached to the .END target. It should only
78 * be called when the job table is empty.
80 * Job_AbortAll Abort all currently running jobs. It doesn't handle
81 * output or do anything for the jobs, just kills them.
82 * It should only be called in an emergency, as it were.
85 * Verify that the commands for a target are ok. Provide
86 * them if necessary and possible.
88 * Job_Touch Update a target without really updating it.
90 * Job_Wait Wait for all currently-running jobs to finish.
93 * The routines in this file implement the full-compatibility
94 * mode of PMake. Most of the special functionality of PMake
95 * is available in this mode. Things not supported:
97 * - friendly variable substitution.
100 * Compat_Run Initialize things for this module and recreate
101 * thems as need creatin'
104 #include <sys/queue.h>
105 #include <sys/types.h>
106 #include <sys/select.h>
107 #include <sys/stat.h>
109 #include <sys/event.h>
111 #include <sys/wait.h>
116 #include <inttypes.h>
140 #define TMPPAT "/tmp/makeXXXXXXXXXX"
144 * The SEL_ constants determine the maximum amount of time spent in select
145 * before coming out to see if a child has finished. SEL_SEC is the number of
146 * seconds and SEL_USEC is the number of micro-seconds
150 #endif /* !USE_KQUEUE */
153 * Job Table definitions.
155 * The job "table" is kept as a linked Lst in 'jobs', with the number of
156 * active jobs maintained in the 'nJobs' variable. At no time will this
157 * exceed the value of 'maxJobs', initialized by the Job_Init function.
159 * When a job is finished, the Make_Update function is called on each of the
160 * parents of the node which was just remade. This takes care of the upward
161 * traversal of the dependency graph.
163 #define JOB_BUFSIZE 1024
165 pid_t pid; /* The child's process ID */
167 struct GNode *node; /* The target the child is making */
170 * A LstNode for the first command to be saved after the job completes.
171 * This is NULL if there was no "..." in the job's commands.
176 * An FILE* for writing out the commands. This is only
177 * used before the job is actually started.
182 * A word of flags which determine how the module handles errors,
183 * echoing, etc. for the job
185 short flags; /* Flags to control treatment of job */
186 #define JOB_IGNERR 0x001 /* Ignore non-zero exits */
187 #define JOB_SILENT 0x002 /* no output */
188 #define JOB_SPECIAL 0x004 /* Target is a special one. i.e. run it locally
189 * if we can't export it and maxLocal is 0 */
190 #define JOB_IGNDOTS 0x008 /* Ignore "..." lines when processing
192 #define JOB_FIRST 0x020 /* Job is first job for the node */
193 #define JOB_RESTART 0x080 /* Job needs to be completely restarted */
194 #define JOB_RESUME 0x100 /* Job needs to be resumed b/c it stopped,
196 #define JOB_CONTINUING 0x200 /* We are in the process of resuming this job.
197 * Used to avoid infinite recursion between
198 * JobFinish and JobRestart */
200 /* union for handling shell's output */
203 * This part is used when usePipes is true.
204 * The output is being caught via a pipe and the descriptors
205 * of our pipe, an array in which output is line buffered and
206 * the current position in that buffer are all maintained for
211 * Input side of pipe associated with
212 * job's output channel
217 * Output side of pipe associated with job's
223 * Buffer for storing the output of the
226 char op_outBuf[JOB_BUFSIZE + 1];
228 /* Current position in op_outBuf */
233 * If usePipes is false the output is routed to a temporary
234 * file and all that is kept is the name of the file and the
235 * descriptor open to the file.
238 /* Name of file to which shell output was rerouted */
239 char of_outFile[sizeof(TMPPAT)];
242 * Stream open to the output file. Used to funnel all
243 * from a single job to one file while still allowing
244 * multiple shell invocations
249 } output; /* Data for tracking a shell's output */
251 TAILQ_ENTRY(Job) link; /* list link */
254 #define outPipe output.o_pipe.op_outPipe
255 #define inPipe output.o_pipe.op_inPipe
256 #define outBuf output.o_pipe.op_outBuf
257 #define curPos output.o_pipe.op_curPos
258 #define outFile output.o_file.of_outFile
259 #define outFd output.o_file.of_outFd
261 TAILQ_HEAD(JobList, Job);
264 * error handling variables
266 static int aborting = 0; /* why is the make aborting? */
267 #define ABORT_ERROR 1 /* Because of an error */
268 #define ABORT_INTERRUPT 2 /* Because it was interrupted */
269 #define ABORT_WAIT 3 /* Waiting for jobs to finish */
272 * XXX: Avoid SunOS bug... FILENO() is fp->_file, and file
273 * is a char! So when we go above 127 we turn negative!
275 #define FILENO(a) ((unsigned)fileno(a))
278 * post-make command processing. The node postCommands is really just the
279 * .END target but we keep it around to avoid having to search for it
282 static GNode *postCommands;
285 * The number of commands actually printed for a target. Should this
286 * number be 0, no shell will be executed.
288 static int numCommands;
291 * Return values from JobStart.
293 #define JOB_RUNNING 0 /* Job is running */
294 #define JOB_ERROR 1 /* Error in starting the job */
295 #define JOB_FINISHED 2 /* The job is already finished */
296 #define JOB_STOPPED 3 /* The job is stopped */
299 * The maximum number of jobs that may run. This is initialize from the
300 * -j argument for the leading make and from the FIFO for sub-makes.
304 static int nJobs; /* The number of children currently running */
306 /* The structures that describe them */
307 static struct JobList jobs = TAILQ_HEAD_INITIALIZER(jobs);
309 static Boolean jobFull; /* Flag to tell when the job table is full. It
310 * is set TRUE when (1) the total number of
311 * running jobs equals the maximum allowed */
313 static int kqfd; /* File descriptor obtained by kqueue() */
315 static fd_set outputs; /* Set of descriptors of pipes connected to
316 * the output channels of children */
319 static GNode *lastNode; /* The node for which output was most recently
321 static const char *targFmt; /* Format string to use to head output from a
322 * job when it's not the most-recent job heard
324 static char *targPrefix = NULL; /* What we print at the start of targFmt */
326 #define TARG_FMT "%s %s ---\n" /* Default format */
327 #define MESSAGE(fp, gn) \
328 fprintf(fp, targFmt, targPrefix, gn->name);
331 * When JobStart attempts to run a job but isn't allowed to
332 * or when Job_CatchChildren detects a job that has
333 * been stopped somehow, the job is placed on the stoppedJobs queue to be run
334 * when the next job finishes.
336 * Lst of Job structures describing jobs that were stopped due to
337 * concurrency limits or externally
339 static struct JobList stoppedJobs = TAILQ_HEAD_INITIALIZER(stoppedJobs);
341 static int fifoFd; /* Fd of our job fifo */
342 static char fifoName[] = "/tmp/make_fifo_XXXXXXXXX";
343 static int fifoMaster;
345 static sig_atomic_t interrupted;
348 #if defined(USE_PGRP) && defined(SYSV)
349 # define KILL(pid, sig) killpg(-(pid), (sig))
351 # if defined(USE_PGRP)
352 # define KILL(pid, sig) killpg((pid), (sig))
354 # define KILL(pid, sig) kill((pid), (sig))
359 * Grmpf... There is no way to set bits of the wait structure
360 * anymore with the stupid W*() macros. I liked the union wait
361 * stuff much more. So, we devise our own macros... This is
362 * really ugly, use dramamine sparingly. You have been warned.
364 #define W_SETMASKED(st, val, fun) \
367 int mask = fun(sh); \
369 for (sh = 0; ((mask >> sh) & 1) == 0; sh++) \
371 *(st) = (*(st) & ~mask) | ((val) << sh); \
374 #define W_SETTERMSIG(st, val) W_SETMASKED(st, val, WTERMSIG)
375 #define W_SETEXITSTATUS(st, val) W_SETMASKED(st, val, WEXITSTATUS)
377 static void JobRestart(Job *);
378 static int JobStart(GNode *, int, Job *);
379 static void JobDoOutput(Job *, Boolean);
380 static void JobInterrupt(int, int);
381 static void JobRestartJobs(void);
382 static int Compat_RunCommand(char *, struct GNode *);
384 static GNode *curTarg = NULL;
385 static GNode *ENDNode;
388 * Create a fifo file with a uniq filename, and returns a file
389 * descriptor to that fifo.
392 mkfifotemp(char *template)
397 const unsigned char padchar[] =
398 "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
400 if (template[0] == '\0') {
401 errno = EINVAL; /* bad input string */
405 /* Find end of template string. */
406 pathend = strchr(template, '\0');
410 * Starting from the end of the template replace spaces with 'X' in
411 * them with random characters until there are no more 'X'.
413 while (ptr >= template && *ptr == 'X') {
414 uint32_t rand_num = arc4random() % (sizeof(padchar) - 1);
415 *ptr-- = padchar[rand_num];
419 /* Check the target directory. */
420 for (; ptr > template; --ptr) {
425 if (stat(template, &sbuf) != 0)
428 if (!S_ISDIR(sbuf.st_mode)) {
438 if (mkfifo(template, 0600) == 0) {
441 if ((fd = open(template, O_RDWR, 0600)) < 0) {
448 if (errno != EEXIST) {
454 * If we have a collision, cycle through the space of
457 for (ptr = start;;) {
460 if (*ptr == '\0' || ptr == pathend)
463 pad = strchr(padchar, *ptr);
464 if (pad == NULL || *++pad == '\0') {
476 catch_child(int sig __unused)
486 * Catch SIGCHLD so that we get kicked out of select() when we
487 * need to look at a child. This is only known to matter for the
488 * -j case (perhaps without -P).
490 * XXX this is intentionally misplaced.
494 sigemptyset(&sa.sa_mask);
495 sa.sa_flags = SA_RESTART | SA_NOCLDSTOP;
496 sa.sa_handler = catch_child;
497 sigaction(SIGCHLD, &sa, NULL);
501 * Wait for child process to terminate.
504 ProcWait(ProcStuff *ps)
510 * Wait for the process to exit.
514 if (pid == -1 && errno != EINTR) {
515 Fatal("error in wait: %d", pid);
518 if (pid == ps->child_pid) {
531 * Got a signal. Set global variables and hope that someone will
535 JobCatchSig(int signo)
543 * Pass a signal on to all local jobs if
544 * USE_PGRP is defined, then die ourselves.
547 * We die by the same signal.
550 JobPassSig(int signo)
553 sigset_t nmask, omask;
554 struct sigaction act;
557 sigaddset(&nmask, signo);
558 sigprocmask(SIG_SETMASK, &nmask, &omask);
560 DEBUGF(JOB, ("JobPassSig(%d) called.\n", signo));
561 TAILQ_FOREACH(job, &jobs, link) {
562 DEBUGF(JOB, ("JobPassSig passing signal %d to child %jd.\n",
563 signo, (intmax_t)job->pid));
564 KILL(job->pid, signo);
568 * Deal with proper cleanup based on the signal received. We only run
569 * the .INTERRUPT target if the signal was in fact an interrupt.
570 * The other three termination signals are more of a "get out *now*"
573 if (signo == SIGINT) {
574 JobInterrupt(TRUE, signo);
575 } else if (signo == SIGHUP || signo == SIGTERM || signo == SIGQUIT) {
576 JobInterrupt(FALSE, signo);
580 * Leave gracefully if SIGQUIT, rather than core dumping.
582 if (signo == SIGQUIT) {
587 * Send ourselves the signal now we've given the message to everyone
588 * else. Note we block everything else possible while we're getting
589 * the signal. This ensures that all our jobs get continued when we
590 * wake up before we take any other signal.
591 * XXX this comment seems wrong.
593 act.sa_handler = SIG_DFL;
594 sigemptyset(&act.sa_mask);
596 sigaction(signo, &act, NULL);
598 DEBUGF(JOB, ("JobPassSig passing signal to self, mask = %x.\n",
599 ~0 & ~(1 << (signo - 1))));
600 signal(signo, SIG_DFL);
602 KILL(getpid(), signo);
605 TAILQ_FOREACH(job, &jobs, link) {
606 DEBUGF(JOB, ("JobPassSig passing signal %d to child %jd.\n",
607 signo, (intmax_t)job->pid));
608 KILL(job->pid, signo);
611 sigprocmask(SIG_SETMASK, &omask, NULL);
612 sigprocmask(SIG_SETMASK, &omask, NULL);
613 act.sa_handler = JobPassSig;
614 sigaction(signo, &act, NULL);
619 * Put out another command for the given job. If the command starts
620 * with an @ or a - we process it specially. In the former case,
621 * so long as the -s and -n flags weren't given to make, we stick
622 * a shell-specific echoOff command in the script. In the latter,
623 * we ignore errors for the entire job, unless the shell has error
625 * If the command is just "..." we take all future commands for this
626 * job to be commands to be executed once the entire graph has been
627 * made and return non-zero to signal that the end of the commands
628 * was reached. These commands are later attached to the postCommands
629 * node and executed by Job_Finish when all things are done.
630 * This function is called from JobStart via LST_FOREACH.
633 * Always 0, unless the command was "..."
636 * If the command begins with a '-' and the shell has no error control,
637 * the JOB_IGNERR flag is set in the job descriptor.
638 * If the command is "..." and we're not ignoring such things,
639 * tailCmds is set to the successor node of the cmd.
640 * numCommands is incremented if the command is actually printed.
643 JobPrintCommand(char *cmd, Job *job)
645 Boolean noSpecials; /* true if we shouldn't worry about
646 * inserting special commands into
647 * the input stream. */
648 Boolean shutUp = FALSE; /* true if we put a no echo command
649 * into the command file */
650 Boolean errOff = FALSE; /* true if we turned error checking
651 * off before printing the command
652 * and need to turn it back on */
653 const char *cmdTemplate;/* Template to use when printing the command */
654 char *cmdStart; /* Start of expanded command */
655 LstNode *cmdNode; /* Node for replacing the command */
657 noSpecials = (noExecute && !(job->node->type & OP_MAKE));
659 if (strcmp(cmd, "...") == 0) {
660 job->node->type |= OP_SAVE_CMDS;
661 if ((job->flags & JOB_IGNDOTS) == 0) {
663 Lst_Succ(Lst_Member(&job->node->commands, cmd));
669 #define DBPRINTF(fmt, arg) \
670 DEBUGF(JOB, (fmt, arg)); \
671 fprintf(job->cmdFILE, fmt, arg); \
672 fflush(job->cmdFILE);
677 * For debugging, we replace each command with the result of expanding
678 * the variables in the command.
680 cmdNode = Lst_Member(&job->node->commands, cmd);
682 cmd = Buf_Peel(Var_Subst(cmd, job->node, FALSE));
685 Lst_Replace(cmdNode, cmdStart);
687 cmdTemplate = "%s\n";
690 * Check for leading @', -' or +'s to control echoing, error checking,
691 * and execution on -n.
693 while (*cmd == '@' || *cmd == '-' || *cmd == '+') {
697 shutUp = DEBUG(LOUD) ? FALSE : TRUE;
707 * We're not actually exececuting anything...
708 * but this one needs to be - use compat mode
711 Compat_RunCommand(cmd, job->node);
719 while (isspace((unsigned char)*cmd))
723 if (!(job->flags & JOB_SILENT) && !noSpecials &&
724 commandShell->hasEchoCtl) {
725 DBPRINTF("%s\n", commandShell->echoOff);
732 if (!(job->flags & JOB_IGNERR) && !noSpecials) {
733 if (commandShell->hasErrCtl) {
735 * We don't want the error-control commands
736 * showing up either, so we turn off echoing
737 * while executing them. We could put another
738 * field in the shell structure to tell
739 * JobDoOutput to look for this string too,
740 * but why make it any more complex than
743 if (!(job->flags & JOB_SILENT) && !shutUp &&
744 commandShell->hasEchoCtl) {
745 DBPRINTF("%s\n", commandShell->echoOff);
746 DBPRINTF("%s\n", commandShell->ignErr);
747 DBPRINTF("%s\n", commandShell->echoOn);
749 DBPRINTF("%s\n", commandShell->ignErr);
751 } else if (commandShell->ignErr &&
752 *commandShell->ignErr != '\0') {
754 * The shell has no error control, so we need to
755 * be weird to get it to ignore any errors from
756 * the command. If echoing is turned on, we turn
757 * it off and use the errCheck template to echo
758 * the command. Leave echoing off so the user
759 * doesn't see the weirdness we go through to
760 * ignore errors. Set cmdTemplate to use the
761 * weirdness instead of the simple "%s\n"
764 if (!(job->flags & JOB_SILENT) && !shutUp &&
765 commandShell->hasEchoCtl) {
766 DBPRINTF("%s\n", commandShell->echoOff);
767 DBPRINTF(commandShell->errCheck, cmd);
770 cmdTemplate = commandShell->ignErr;
772 * The error ignoration (hee hee) is already
773 * taken care of by the ignErr template, so
774 * pretend error checking is still on.
785 DBPRINTF(cmdTemplate, cmd);
789 * If echoing is already off, there's no point in issuing the
790 * echoOff command. Otherwise we issue it and pretend it was on
791 * for the whole command...
793 if (!shutUp && !(job->flags & JOB_SILENT) &&
794 commandShell->hasEchoCtl) {
795 DBPRINTF("%s\n", commandShell->echoOff);
798 DBPRINTF("%s\n", commandShell->errCheck);
801 DBPRINTF("%s\n", commandShell->echoOn);
808 * Called to close both input and output pipes when a job is finished.
811 * The file descriptors associated with the job are closed.
818 #if !defined(USE_KQUEUE)
819 FD_CLR(job->inPipe, &outputs);
821 if (job->outPipe != job->inPipe) {
824 JobDoOutput(job, TRUE);
828 JobDoOutput(job, TRUE);
834 * Do final processing for the given job including updating
835 * parents and starting new jobs as available/necessary. Note
836 * that we pay no attention to the JOB_IGNERR flag here.
837 * This is because when we're called because of a noexecute flag
838 * or something, jstat.w_status is 0 and when called from
839 * Job_CatchChildren, the status is zeroed if it s/b ignored.
842 * Some nodes may be put on the toBeMade queue.
843 * Final commands for the job are placed on postCommands.
845 * If we got an error and are aborting (aborting == ABORT_ERROR) and
846 * the job list is now empty, we are done for the day.
847 * If we recognized an error (makeErrors !=0), we set the aborting flag
848 * to ABORT_ERROR so no more jobs will be started.
851 JobFinish(Job *job, int *status)
856 if (WIFEXITED(*status)) {
857 int job_status = WEXITSTATUS(*status);
861 * Deal with ignored errors in -B mode. We need to
862 * print a message telling of the ignored error as
863 * well as setting status.w_status to 0 so the next
864 * command gets run. To do this, we set done to be
865 * TRUE if in -B mode and the job exited non-zero.
867 if (job_status == 0) {
870 if (job->flags & JOB_IGNERR) {
874 * If it exited non-zero and either we're
875 * doing things our way or we're not ignoring
876 * errors, the job is finished. Similarly, if
877 * the shell died because of a signal the job
878 * is also finished. In these cases, finish
879 * out the job's output before printing the
883 if (job->cmdFILE != NULL &&
884 job->cmdFILE != stdout) {
885 fclose(job->cmdFILE);
890 } else if (WIFSIGNALED(*status)) {
891 if (WTERMSIG(*status) == SIGCONT) {
893 * No need to close things down or anything.
898 * If it exited non-zero and either we're
899 * doing things our way or we're not ignoring
900 * errors, the job is finished. Similarly, if
901 * the shell died because of a signal the job
902 * is also finished. In these cases, finish
903 * out the job's output before printing the
907 if (job->cmdFILE != NULL &&
908 job->cmdFILE != stdout) {
909 fclose(job->cmdFILE);
915 * No need to close things down or anything.
920 if (WIFEXITED(*status)) {
921 if (done || DEBUG(JOB)) {
926 (job->flags & JOB_IGNERR)) {
928 * If output is going to a file and this job
929 * is ignoring errors, arrange to have the
930 * exit status sent to the output file as
933 out = fdopen(job->outFd, "w");
935 Punt("Cannot fdopen");
940 DEBUGF(JOB, ("Process %jd exited.\n",
941 (intmax_t)job->pid));
943 if (WEXITSTATUS(*status) == 0) {
945 if (usePipes && job->node != lastNode) {
946 MESSAGE(out, job->node);
947 lastNode = job->node;
950 "*** Completed successfully\n");
953 if (usePipes && job->node != lastNode) {
954 MESSAGE(out, job->node);
955 lastNode = job->node;
957 fprintf(out, "*** Error code %d%s\n",
958 WEXITSTATUS(*status),
959 (job->flags & JOB_IGNERR) ?
962 if (job->flags & JOB_IGNERR) {
969 } else if (WIFSIGNALED(*status)) {
970 if (done || DEBUG(JOB) || (WTERMSIG(*status) == SIGCONT)) {
975 (job->flags & JOB_IGNERR)) {
977 * If output is going to a file and this job
978 * is ignoring errors, arrange to have the
979 * exit status sent to the output file as
982 out = fdopen(job->outFd, "w");
984 Punt("Cannot fdopen");
989 if (WTERMSIG(*status) == SIGCONT) {
991 * If the beastie has continued, shift the
992 * Job from the stopped list to the running
993 * one (or re-stop it if concurrency is
994 * exceeded) and go and get another child.
996 if (job->flags & (JOB_RESUME | JOB_RESTART)) {
997 if (usePipes && job->node != lastNode) {
998 MESSAGE(out, job->node);
999 lastNode = job->node;
1001 fprintf(out, "*** Continued\n");
1003 if (!(job->flags & JOB_CONTINUING)) {
1004 DEBUGF(JOB, ("Warning: process %jd was not "
1005 "continuing.\n", (intmax_t) job->pid));
1008 * We don't really want to restart a
1009 * job from scratch just because it
1010 * continued, especially not without
1011 * killing the continuing process!
1012 * That's why this is ifdef'ed out.
1018 job->flags &= ~JOB_CONTINUING;
1019 TAILQ_INSERT_TAIL(&jobs, job, link);
1021 DEBUGF(JOB, ("Process %jd is continuing locally.\n",
1022 (intmax_t) job->pid));
1023 if (nJobs == maxJobs) {
1025 DEBUGF(JOB, ("Job queue is full.\n"));
1031 if (usePipes && job->node != lastNode) {
1032 MESSAGE(out, job->node);
1033 lastNode = job->node;
1036 "*** Signal %d\n", WTERMSIG(*status));
1044 if (compatMake && !usePipes && (job->flags & JOB_IGNERR)) {
1046 * If output is going to a file and this job
1047 * is ignoring errors, arrange to have the
1048 * exit status sent to the output file as
1051 out = fdopen(job->outFd, "w");
1053 Punt("Cannot fdopen");
1058 DEBUGF(JOB, ("Process %jd stopped.\n", (intmax_t) job->pid));
1059 if (usePipes && job->node != lastNode) {
1060 MESSAGE(out, job->node);
1061 lastNode = job->node;
1063 fprintf(out, "*** Stopped -- signal %d\n", WSTOPSIG(*status));
1064 job->flags |= JOB_RESUME;
1065 TAILQ_INSERT_TAIL(&stoppedJobs, job, link);
1071 * Now handle the -B-mode stuff. If the beast still isn't finished,
1072 * try and restart the job on the next command. If JobStart says it's
1073 * ok, it's ok. If there's an error, this puppy is done.
1075 if (compatMake && WIFEXITED(*status) &&
1076 Lst_Succ(job->node->compat_command) != NULL) {
1077 switch (JobStart(job->node, job->flags & JOB_IGNDOTS, job)) {
1083 W_SETEXITSTATUS(status, 1);
1087 * If we got back a JOB_FINISHED code, JobStart has
1088 * already called Make_Update and freed the job
1089 * descriptor. We set done to false here to avoid fake
1090 * cycles and double frees. JobStart needs to do the
1091 * update so we can proceed up the graph when given
1103 if (done && aborting != ABORT_ERROR &&
1104 aborting != ABORT_INTERRUPT && *status == 0) {
1106 * As long as we aren't aborting and the job didn't return a
1107 * non-zero status that we shouldn't ignore, we call
1108 * Make_Update to update the parents. In addition, any saved
1109 * commands for the node are placed on the .END target.
1111 for (ln = job->tailCmds; ln != NULL; ln = LST_NEXT(ln)) {
1112 Lst_AtEnd(&postCommands->commands,
1114 Var_Subst(Lst_Datum(ln), job->node, FALSE)));
1117 job->node->made = MADE;
1118 Make_Update(job->node);
1121 } else if (*status != 0) {
1129 * Set aborting if any error.
1131 if (makeErrors && !keepgoing && aborting != ABORT_INTERRUPT) {
1133 * If we found any errors in this batch of children and the -k
1134 * flag wasn't given, we set the aborting flag so no more jobs
1137 aborting = ABORT_ERROR;
1140 if (aborting == ABORT_ERROR && Job_Empty()) {
1142 * If we are aborting and the job table is now empty, we finish.
1150 * Touch the given target. Called by JobStart when the -t flag was
1151 * given. Prints messages unless told to be silent.
1154 * The data modification of the file is changed. In addition, if the
1155 * file did not exist, it is created.
1158 Job_Touch(GNode *gn, Boolean silent)
1160 int streamID; /* ID of stream opened to do the touch */
1161 struct utimbuf times; /* Times for utime() call */
1163 if (gn->type & (OP_JOIN | OP_USE | OP_EXEC | OP_OPTIONAL)) {
1165 * .JOIN, .USE, .ZEROTIME and .OPTIONAL targets are "virtual"
1166 * targets and, as such, shouldn't really be created.
1172 fprintf(stdout, "touch %s\n", gn->name);
1180 if (gn->type & OP_ARCHV) {
1182 } else if (gn->type & OP_LIB) {
1185 char *file = gn->path ? gn->path : gn->name;
1187 times.actime = times.modtime = now;
1188 if (utime(file, ×) < 0) {
1189 streamID = open(file, O_RDWR | O_CREAT, 0666);
1191 if (streamID >= 0) {
1195 * Read and write a byte to the file to change
1196 * the modification time, then close the file.
1198 if (read(streamID, &c, 1) == 1) {
1199 lseek(streamID, (off_t)0, SEEK_SET);
1200 write(streamID, &c, 1);
1205 fprintf(stdout, "*** couldn't touch %s: %s",
1206 file, strerror(errno));
1215 * Make sure the given node has all the commands it needs.
1218 * TRUE if the commands list is/was ok.
1221 * The node will have commands from the .DEFAULT rule added to it
1225 Job_CheckCommands(GNode *gn, void (*abortProc)(const char *, ...))
1228 if (OP_NOP(gn->type) && Lst_IsEmpty(&gn->commands) &&
1229 (gn->type & OP_LIB) == 0) {
1231 * No commands. Look for .DEFAULT rule from which we might infer
1234 if (DEFAULT != NULL && !Lst_IsEmpty(&DEFAULT->commands)) {
1236 * Make only looks for a .DEFAULT if the node was
1237 * never the target of an operator, so that's what we
1238 * do too. If a .DEFAULT was given, we substitute its
1239 * commands for gn's commands and set the IMPSRC
1240 * variable to be the target's name The DEFAULT node
1241 * acts like a transformation rule, in that gn also
1242 * inherits any attributes or sources attached to
1245 Make_HandleUse(DEFAULT, gn);
1246 Var_Set(IMPSRC, Var_Value(TARGET, gn), gn);
1248 } else if (Dir_MTime(gn) == 0) {
1250 * The node wasn't the target of an operator we have
1251 * no .DEFAULT rule to go on and the target doesn't
1252 * already exist. There's nothing more we can do for
1253 * this branch. If the -k flag wasn't given, we stop
1254 * in our tracks, otherwise we just don't update
1255 * this node's parents so they never get examined.
1257 static const char msg[] =
1258 "make: don't know how to make";
1260 if (gn->type & OP_OPTIONAL) {
1261 fprintf(stdout, "%s %s(ignored)\n",
1264 } else if (keepgoing) {
1265 fprintf(stdout, "%s %s(continuing)\n",
1270 #ifndef WITHOUT_OLD_JOKE
1271 if (strcmp(gn->name,"love") == 0)
1272 (*abortProc)("Not war.");
1275 (*abortProc)("%s %s. Stop",
1286 * Execute the shell for the given job. Called from JobStart and
1290 * A shell is executed, outputs is altered and the Job structure added
1294 JobExec(Job *job, char **argv)
1301 DEBUGF(JOB, ("Running %s\n", job->node->name));
1302 DEBUGF(JOB, ("\tCommand: "));
1303 for (i = 0; argv[i] != NULL; i++) {
1304 DEBUGF(JOB, ("%s ", argv[i]));
1306 DEBUGF(JOB, ("\n"));
1310 * Some jobs produce no output and it's disconcerting to have
1311 * no feedback of their running (since they produce no output, the
1312 * banner with their name in it never appears). This is an attempt to
1313 * provide that feedback, even if nothing follows it.
1315 if (lastNode != job->node && (job->flags & JOB_FIRST) &&
1316 !(job->flags & JOB_SILENT)) {
1317 MESSAGE(stdout, job->node);
1318 lastNode = job->node;
1321 ps.in = FILENO(job->cmdFILE);
1324 * Set up the child's output to be routed through the
1325 * pipe we've created for it.
1327 ps.out = job->outPipe;
1330 * We're capturing output in a file, so we duplicate
1331 * the descriptor to the temporary file into the
1334 ps.out = job->outFd;
1336 ps.err = STDERR_FILENO;
1338 ps.merge_errors = 1;
1346 * Fork. Warning since we are doing vfork() instead of fork(),
1347 * do not allocate memory in the child process!
1349 if ((ps.child_pid = vfork()) == -1) {
1350 Punt("Cannot fork");
1353 } else if (ps.child_pid == 0) {
1367 job->pid = ps.child_pid;
1369 if (usePipes && (job->flags & JOB_FIRST)) {
1371 * The first time a job is run for a node, we set the
1372 * current position in the buffer to the beginning and
1373 * mark another stream to watch in the outputs mask.
1376 struct kevent kev[2];
1380 #if defined(USE_KQUEUE)
1381 EV_SET(&kev[0], job->inPipe, EVFILT_READ, EV_ADD, 0, 0, job);
1382 EV_SET(&kev[1], job->pid, EVFILT_PROC,
1383 EV_ADD | EV_ONESHOT, NOTE_EXIT, 0, NULL);
1384 if (kevent(kqfd, kev, 2, NULL, 0, NULL) != 0) {
1386 * kevent() will fail if the job is already
1389 if (errno != EINTR && errno != EBADF && errno != ESRCH)
1390 Punt("kevent: %s", strerror(errno));
1393 FD_SET(job->inPipe, &outputs);
1394 #endif /* USE_KQUEUE */
1397 if (job->cmdFILE != NULL && job->cmdFILE != stdout) {
1398 fclose(job->cmdFILE);
1399 job->cmdFILE = NULL;
1403 * Now the job is actually running, add it to the table.
1406 TAILQ_INSERT_TAIL(&jobs, job, link);
1407 if (nJobs == maxJobs) {
1414 * Create the argv needed to execute the shell for a given job.
1417 JobMakeArgv(Job *job, char **argv)
1420 static char args[10]; /* For merged arguments */
1422 argv[0] = commandShell->name;
1425 if ((commandShell->exit && *commandShell->exit != '-') ||
1426 (commandShell->echo && *commandShell->echo != '-')) {
1428 * At least one of the flags doesn't have a minus before it, so
1429 * merge them together. Have to do this because the *(&(@*#*&#$#
1430 * Bourne shell thinks its second argument is a file to source.
1431 * Grrrr. Note the ten-character limitation on the combined
1434 sprintf(args, "-%s%s", (job->flags & JOB_IGNERR) ? "" :
1435 commandShell->exit ? commandShell->exit : "",
1436 (job->flags & JOB_SILENT) ? "" :
1437 commandShell->echo ? commandShell->echo : "");
1444 if (!(job->flags & JOB_IGNERR) && commandShell->exit) {
1445 argv[argc] = commandShell->exit;
1448 if (!(job->flags & JOB_SILENT) && commandShell->echo) {
1449 argv[argc] = commandShell->echo;
1458 * Restart a job that stopped for some reason. The job must be neither
1459 * on the jobs nor on the stoppedJobs list.
1462 * jobFull will be set if the job couldn't be run.
1465 JobRestart(Job *job)
1468 if (job->flags & JOB_RESTART) {
1470 * Set up the control arguments to the shell. This is based on
1471 * the flags set earlier for this job. If the JOB_IGNERR flag
1472 * is clear, the 'exit' flag of the commandShell is used to
1473 * cause it to exit upon receiving an error. If the JOB_SILENT
1474 * flag is clear, the 'echo' flag of the commandShell is used
1475 * to get it to start echoing as soon as it starts
1476 * processing commands.
1480 JobMakeArgv(job, argv);
1482 DEBUGF(JOB, ("Restarting %s...", job->node->name));
1483 if (nJobs >= maxJobs && !(job->flags & JOB_SPECIAL)) {
1485 * Not allowed to run -- put it back on the hold
1486 * queue and mark the table full
1488 DEBUGF(JOB, ("holding\n"));
1489 TAILQ_INSERT_HEAD(&stoppedJobs, job, link);
1491 DEBUGF(JOB, ("Job queue is full.\n"));
1495 * Job may be run locally.
1497 DEBUGF(JOB, ("running locally\n"));
1503 * The job has stopped and needs to be restarted.
1504 * Why it stopped, we don't know...
1506 DEBUGF(JOB, ("Resuming %s...", job->node->name));
1507 if ((nJobs < maxJobs || ((job->flags & JOB_SPECIAL) &&
1508 maxJobs == 0)) && nJobs != maxJobs) {
1510 * If we haven't reached the concurrency limit already
1511 * (or the job must be run and maxJobs is 0), it's ok
1517 error = (KILL(job->pid, SIGCONT) != 0);
1521 * Make sure the user knows we've continued
1522 * the beast and actually put the thing in the
1525 job->flags |= JOB_CONTINUING;
1527 W_SETTERMSIG(&status, SIGCONT);
1528 JobFinish(job, &status);
1530 job->flags &= ~(JOB_RESUME|JOB_CONTINUING);
1531 DEBUGF(JOB, ("done\n"));
1533 Error("couldn't resume %s: %s",
1534 job->node->name, strerror(errno));
1536 W_SETEXITSTATUS(&status, 1);
1537 JobFinish(job, &status);
1541 * Job cannot be restarted. Mark the table as full and
1542 * place the job back on the list of stopped jobs.
1544 DEBUGF(JOB, ("table full\n"));
1545 TAILQ_INSERT_HEAD(&stoppedJobs, job, link);
1547 DEBUGF(JOB, ("Job queue is full.\n"));
1554 * Start a target-creation process going for the target described
1555 * by the graph node gn.
1558 * JOB_ERROR if there was an error in the commands, JOB_FINISHED
1559 * if there isn't actually anything left to do for the job and
1560 * JOB_RUNNING if the job has been started.
1563 * A new Job node is created and added to the list of running
1564 * jobs. PMake is forked and a child shell created.
1567 JobStart(GNode *gn, int flags, Job *previous)
1569 Job *job; /* new job descriptor */
1570 char *argv[4]; /* Argument vector to shell */
1571 Boolean cmdsOK; /* true if the nodes commands were all right */
1572 Boolean noExec; /* Set true if we decide not to run the job */
1573 int tfd; /* File descriptor for temp file */
1575 char tfile[sizeof(TMPPAT)];
1578 JobPassSig(interrupted);
1581 if (previous != NULL) {
1582 previous->flags &= ~(JOB_FIRST | JOB_IGNERR | JOB_SILENT);
1585 job = emalloc(sizeof(Job));
1590 job->tailCmds = NULL;
1593 * Set the initial value of the flags for this job based on the global
1594 * ones and the node's attributes... Any flags supplied by the caller
1595 * are also added to the field.
1598 if (Targ_Ignore(gn)) {
1599 job->flags |= JOB_IGNERR;
1601 if (Targ_Silent(gn)) {
1602 job->flags |= JOB_SILENT;
1604 job->flags |= flags;
1607 * Check the commands now so any attributes from .DEFAULT have a chance
1608 * to migrate to the node.
1610 if (!compatMake && (job->flags & JOB_FIRST)) {
1611 cmdsOK = Job_CheckCommands(gn, Error);
1617 * If the -n flag wasn't given, we open up OUR (not the child's)
1618 * temporary file to stuff commands in it. The thing is rd/wr so we
1619 * don't need to reopen it to feed it to the shell. If the -n flag
1620 * *was* given, we just set the file to be stdout. Cute, huh?
1622 if ((gn->type & OP_MAKE) || (!noExecute && !touchFlag)) {
1624 * We're serious here, but if the commands were bogus, we're
1631 strcpy(tfile, TMPPAT);
1632 if ((tfd = mkstemp(tfile)) == -1)
1633 Punt("Cannot create temp file: %s", strerror(errno));
1634 job->cmdFILE = fdopen(tfd, "w+");
1636 if (job->cmdFILE == NULL) {
1638 Punt("Could not open %s", tfile);
1640 fcntl(FILENO(job->cmdFILE), F_SETFD, 1);
1642 * Send the commands to the command file, flush all its
1643 * buffers then rewind and remove the thing.
1648 * Used to be backwards; replace when start doing multiple
1649 * commands per shell.
1653 * Be compatible: If this is the first time for this
1654 * node, verify its commands are ok and open the
1655 * commands list for sequential access by later
1656 * invocations of JobStart. Once that is done, we take
1657 * the next command off the list and print it to the
1658 * command file. If the command was an ellipsis, note
1659 * that there's nothing more to execute.
1661 if (job->flags & JOB_FIRST)
1662 gn->compat_command = Lst_First(&gn->commands);
1664 gn->compat_command =
1665 Lst_Succ(gn->compat_command);
1667 if (gn->compat_command == NULL ||
1668 JobPrintCommand(Lst_Datum(gn->compat_command), job))
1671 if (noExec && !(job->flags & JOB_FIRST)) {
1673 * If we're not going to execute anything, the
1674 * job is done and we need to close down the
1675 * various file descriptors we've opened for
1676 * output, then call JobDoOutput to catch the
1677 * final characters or send the file to the
1678 * screen... Note that the i/o streams are only
1679 * open if this isn't the first job. Note also
1680 * that this could not be done in
1681 * Job_CatchChildren b/c it wasn't clear if
1682 * there were more commands to execute or not...
1688 * We can do all the commands at once. hooray for sanity
1691 LST_FOREACH(ln, &gn->commands) {
1692 if (JobPrintCommand(Lst_Datum(ln), job))
1697 * If we didn't print out any commands to the shell
1698 * script, there's not much point in executing the
1701 if (numCommands == 0) {
1706 } else if (noExecute) {
1708 * Not executing anything -- just print all the commands to
1709 * stdout in one fell swoop. This will still set up
1710 * job->tailCmds correctly.
1712 if (lastNode != gn) {
1713 MESSAGE(stdout, gn);
1716 job->cmdFILE = stdout;
1719 * Only print the commands if they're ok, but don't die if
1720 * they're not -- just let the user know they're bad and keep
1721 * going. It doesn't do any harm in this case and may do
1725 LST_FOREACH(ln, &gn->commands) {
1726 if (JobPrintCommand(Lst_Datum(ln), job))
1731 * Don't execute the shell, thank you.
1737 * Just touch the target and note that no shell should be
1738 * executed. Set cmdFILE to stdout to make life easier. Check
1739 * the commands, too, but don't die if they're no good -- it
1740 * does no harm to keep working up the graph.
1742 job->cmdFILE = stdout;
1743 Job_Touch(gn, job->flags & JOB_SILENT);
1748 * If we're not supposed to execute a shell, don't.
1752 * Unlink and close the command file if we opened one
1754 if (job->cmdFILE != stdout) {
1755 if (job->cmdFILE != NULL)
1756 fclose(job->cmdFILE);
1762 * We only want to work our way up the graph if we aren't here
1763 * because the commands for the job were no good.
1766 if (aborting == 0) {
1767 for (ln = job->tailCmds; ln != NULL;
1768 ln = LST_NEXT(ln)) {
1769 Lst_AtEnd(&postCommands->commands,
1770 Buf_Peel(Var_Subst(Lst_Datum(ln),
1771 job->node, FALSE)));
1773 job->node->made = MADE;
1774 Make_Update(job->node);
1777 return(JOB_FINISHED);
1783 fflush(job->cmdFILE);
1787 * Set up the control arguments to the shell. This is based on the flags
1788 * set earlier for this job.
1790 JobMakeArgv(job, argv);
1793 * If we're using pipes to catch output, create the pipe by which we'll
1794 * get the shell's output. If we're using files, print out that we're
1795 * starting a job and then set up its temporary-file name.
1797 if (!compatMake || (job->flags & JOB_FIRST)) {
1802 Punt("Cannot create pipe: %s", strerror(errno));
1803 job->inPipe = fd[0];
1804 job->outPipe = fd[1];
1805 fcntl(job->inPipe, F_SETFD, 1);
1806 fcntl(job->outPipe, F_SETFD, 1);
1808 fprintf(stdout, "Remaking `%s'\n", gn->name);
1810 strcpy(job->outFile, TMPPAT);
1811 if ((job->outFd = mkstemp(job->outFile)) == -1)
1812 Punt("cannot create temp file: %s",
1814 fcntl(job->outFd, F_SETFD, 1);
1818 if (nJobs >= maxJobs && !(job->flags & JOB_SPECIAL) && maxJobs != 0) {
1820 * We've hit the limit of concurrency, so put the job on hold
1821 * until some other job finishes. Note that the special jobs
1822 * (.BEGIN, .INTERRUPT and .END) may be run even when the
1823 * limit has been reached (e.g. when maxJobs == 0).
1827 DEBUGF(JOB, ("Can only run job locally.\n"));
1828 job->flags |= JOB_RESTART;
1829 TAILQ_INSERT_TAIL(&stoppedJobs, job, link);
1831 if (nJobs >= maxJobs) {
1833 * If we're running this job as a special case
1834 * (see above), at least say the table is full.
1837 DEBUGF(JOB, ("Local job queue is full.\n"));
1841 return (JOB_RUNNING);
1845 JobOutput(Job *job, char *cp, char *endp, int msg)
1849 if (commandShell->noPrint) {
1850 ecp = strstr(cp, commandShell->noPrint);
1851 while (ecp != NULL) {
1854 if (msg && job->node != lastNode) {
1855 MESSAGE(stdout, job->node);
1856 lastNode = job->node;
1859 * The only way there wouldn't be a newline
1860 * after this line is if it were the last in
1861 * the buffer. However, since the non-printable
1862 * comes after it, there must be a newline, so
1863 * we don't print one.
1865 fprintf(stdout, "%s", cp);
1868 cp = ecp + strlen(commandShell->noPrint);
1871 * Still more to print, look again after
1872 * skipping the whitespace following the
1873 * non-printable command....
1876 while (*cp == ' ' || *cp == '\t' ||
1880 ecp = strstr(cp, commandShell->noPrint);
1891 * This function is called at different times depending on
1892 * whether the user has specified that output is to be collected
1893 * via pipes or temporary files. In the former case, we are called
1894 * whenever there is something to read on the pipe. We collect more
1895 * output from the given job and store it in the job's outBuf. If
1896 * this makes up a line, we print it tagged by the job's identifier,
1898 * If output has been collected in a temporary file, we open the
1899 * file and read it line by line, transfering it to our own
1900 * output channel until the file is empty. At which point we
1901 * remove the temporary file.
1902 * In both cases, however, we keep our figurative eye out for the
1903 * 'noPrint' line for the shell from which the output came. If
1904 * we recognize a line, we don't print it. If the command is not
1905 * alone on the line (the character after it is not \0 or \n), we
1906 * do print whatever follows it.
1909 * curPos may be shifted as may the contents of outBuf.
1912 JobDoOutput(Job *job, Boolean finish)
1914 Boolean gotNL = FALSE; /* true if got a newline */
1915 Boolean fbuf; /* true if our buffer filled up */
1916 int nr; /* number of bytes read */
1917 int i; /* auxiliary index into outBuf */
1918 int max; /* limit for i (end of current data) */
1919 int nRead; /* (Temporary) number of bytes read */
1920 FILE *oFILE; /* Stream pointer to shell's output file */
1925 * Read as many bytes as will fit in the buffer.
1931 nRead = read(job->inPipe, &job->outBuf[job->curPos],
1932 JOB_BUFSIZE - job->curPos);
1934 * Check for interrupt here too, because the above read may
1935 * block when the child process is stopped. In this case the
1936 * interrupt will unblock it (we don't use SA_RESTART).
1939 JobPassSig(interrupted);
1942 DEBUGF(JOB, ("JobDoOutput(piperead)"));
1949 * If we hit the end-of-file (the job is dead), we must flush
1950 * its remaining output, so pretend we read a newline if
1951 * there's any output remaining in the buffer.
1952 * Also clear the 'finish' flag so we stop looping.
1954 if (nr == 0 && job->curPos != 0) {
1955 job->outBuf[job->curPos] = '\n';
1958 } else if (nr == 0) {
1963 * Look for the last newline in the bytes we just got. If there
1964 * is one, break out of the loop with 'i' as its index and
1967 max = job->curPos + nr;
1968 for (i = job->curPos + nr - 1; i >= job->curPos; i--) {
1969 if (job->outBuf[i] == '\n') {
1972 } else if (job->outBuf[i] == '\0') {
1976 job->outBuf[i] = ' ';
1982 if (job->curPos == JOB_BUFSIZE) {
1984 * If we've run out of buffer space, we have
1985 * no choice but to print the stuff. sigh.
1991 if (gotNL || fbuf) {
1993 * Need to send the output to the screen. Null terminate
1994 * it first, overwriting the newline character if there
1995 * was one. So long as the line isn't one we should
1996 * filter (according to the shell description), we print
1997 * the line, preceded by a target banner if this target
1998 * isn't the same as the one for which we last printed
1999 * something. The rest of the data in the buffer are
2000 * then shifted down to the start of the buffer and
2001 * curPos is set accordingly.
2003 job->outBuf[i] = '\0';
2004 if (i >= job->curPos) {
2007 cp = JobOutput(job, job->outBuf,
2008 &job->outBuf[i], FALSE);
2011 * There's still more in that buffer. This time,
2012 * though, we know there's no newline at the
2013 * end, so we add one of our own free will.
2016 if (job->node != lastNode) {
2017 MESSAGE(stdout, job->node);
2018 lastNode = job->node;
2020 fprintf(stdout, "%s%s", cp,
2026 /* shift the remaining characters down */
2027 memcpy(job->outBuf, &job->outBuf[i + 1],
2029 job->curPos = max - (i + 1);
2033 * We have written everything out, so we just
2034 * start over from the start of the buffer.
2035 * No copying. No nothing.
2042 * If the finish flag is true, we must loop until we hit
2043 * end-of-file on the pipe. This is guaranteed to happen
2044 * eventually since the other end of the pipe is now
2045 * closed (we closed it explicitly and the child has
2046 * exited). When we do get an EOF, finish will be set
2047 * FALSE and we'll fall through and out.
2054 * We've been called to retrieve the output of the job from the
2055 * temporary file where it's been squirreled away. This consists
2056 * of opening the file, reading the output line by line, being
2057 * sure not to print the noPrint line for the shell we used,
2058 * then close and remove the temporary file. Very simple.
2060 * Change to read in blocks and do FindSubString type things
2061 * as for pipes? That would allow for "@echo -n..."
2063 oFILE = fopen(job->outFile, "r");
2064 if (oFILE != NULL) {
2065 fprintf(stdout, "Results of making %s:\n",
2069 while (fgets(inLine, sizeof(inLine), oFILE) != NULL) {
2070 char *cp, *endp, *oendp;
2073 oendp = endp = inLine + strlen(inLine);
2074 if (endp[-1] == '\n') {
2077 cp = JobOutput(job, inLine, endp, FALSE);
2080 * There's still more in that buffer. This time,
2081 * though, we know there's no newline at the
2082 * end, so we add one of our own free will.
2084 fprintf(stdout, "%s", cp);
2086 if (endp != oendp) {
2087 fprintf(stdout, "\n");
2092 eunlink(job->outFile);
2099 * Handle the exit of a child. Called from Make_Make.
2102 * The job descriptor is removed from the list of children.
2105 * We do waits, blocking or not, according to the wisdom of our
2106 * caller, until there are no more children to report. For each
2107 * job, call JobFinish to finish things off. This will take care of
2108 * putting jobs on the stoppedJobs queue.
2111 Job_CatchChildren(Boolean block)
2113 pid_t pid; /* pid of dead child */
2114 Job *job; /* job descriptor for dead child */
2115 int status; /* Exit/termination status */
2118 * Don't even bother if we know there's no one around.
2125 pid = waitpid((pid_t)-1, &status,
2126 (block ? 0 : WNOHANG) | WUNTRACED);
2130 DEBUGF(JOB, ("Process %jd exited or stopped.\n",
2133 TAILQ_FOREACH(job, &jobs, link) {
2134 if (job->pid == pid)
2139 if (WIFSIGNALED(status) &&
2140 (WTERMSIG(status) == SIGCONT)) {
2141 TAILQ_FOREACH(job, &jobs, link) {
2142 if (job->pid == pid)
2146 Error("Resumed child (%jd) "
2147 "not in table", (intmax_t)pid);
2150 TAILQ_REMOVE(&stoppedJobs, job, link);
2152 Error("Child (%jd) not in table?",
2157 TAILQ_REMOVE(&jobs, job, link);
2159 if (fifoFd >= 0 && maxJobs > 1) {
2160 write(fifoFd, "+", 1);
2162 if (nJobs >= maxJobs)
2167 DEBUGF(JOB, ("Job queue is no longer full.\n"));
2172 JobFinish(job, &status);
2175 JobPassSig(interrupted);
2180 * Catch the output from our children, if we're using
2181 * pipes do so. Otherwise just block time until we get a
2182 * signal(most likely a SIGCHLD) since there's no point in
2183 * just spinning when there's nothing to do and the reaping
2184 * of a child can wait for a while.
2187 * Output is read from pipes if we're piping.
2188 * -----------------------------------------------------------------------
2192 Job_CatchOutput(int flag __unused)
2194 Job_CatchOutput(int flag)
2200 struct kevent kev[KEV_SIZE];
2203 struct timeval timeout;
2212 if ((nfds = kevent(kqfd, NULL, 0, kev, KEV_SIZE, NULL)) == -1) {
2214 Punt("kevent: %s", strerror(errno));
2216 JobPassSig(interrupted);
2218 for (i = 0; i < nfds; i++) {
2219 if (kev[i].flags & EV_ERROR) {
2220 warnc(kev[i].data, "kevent");
2223 switch (kev[i].filter) {
2225 JobDoOutput(kev[i].udata, FALSE);
2229 * Just wake up and let
2230 * Job_CatchChildren() collect the
2239 timeout.tv_sec = SEL_SEC;
2240 timeout.tv_usec = SEL_USEC;
2241 if (flag && jobFull && fifoFd >= 0)
2242 FD_SET(fifoFd, &readfds);
2244 nfds = select(FD_SETSIZE, &readfds, (fd_set *)NULL,
2245 (fd_set *)NULL, &timeout);
2248 JobPassSig(interrupted);
2251 if (fifoFd >= 0 && FD_ISSET(fifoFd, &readfds)) {
2255 job = TAILQ_FIRST(&jobs);
2256 while (nfds != 0 && job != NULL) {
2257 if (FD_ISSET(job->inPipe, &readfds)) {
2258 JobDoOutput(job, FALSE);
2261 job = TAILQ_NEXT(job, link);
2263 #endif /* !USE_KQUEUE */
2269 * Start the creation of a target. Basically a front-end for
2270 * JobStart used by the Make module.
2273 * Another job is started.
2279 JobStart(gn, 0, NULL);
2288 } else if (!Var_Exists(MAKE_JOB_PREFIX, VAR_GLOBAL)) {
2289 Var_SetGlobal(MAKE_JOB_PREFIX, "---");
2291 targPrefix = Var_Subst("${" MAKE_JOB_PREFIX "}", VAR_GLOBAL, 0)->buf;
2296 * Initialize the process module, given a maximum number of jobs.
2299 * lists and counters are initialized
2302 Job_Init(int maxproc)
2304 GNode *begin; /* node for commands to do at the very start */
2306 struct sigaction sa;
2309 env = getenv("MAKE_JOBS_FIFO");
2311 if (env == NULL && maxproc > 1) {
2313 * We did not find the environment variable so we are the
2314 * leader. Create the fifo, open it, write one char per
2315 * allowed job into the pipe.
2317 fifoFd = mkfifotemp(fifoName);
2322 fcntl(fifoFd, F_SETFL, O_NONBLOCK);
2324 setenv("MAKE_JOBS_FIFO", env, 1);
2325 while (maxproc-- > 0) {
2326 write(fifoFd, "+", 1);
2328 /* The master make does not get a magic token */
2333 } else if (env != NULL) {
2335 * We had the environment variable so we are a slave.
2336 * Open fifo and give ourselves a magic token which represents
2337 * the token our parent make has grabbed to start his make
2338 * process. Otherwise the sub-makes would gobble up tokens and
2339 * the proper number of tokens to specify to -j would depend
2340 * on the depth of the tree and the order of execution.
2342 fifoFd = open(env, O_RDWR, 0);
2344 fcntl(fifoFd, F_SETFL, O_NONBLOCK);
2360 if ((maxJobs == 1 && fifoFd < 0) || !beVerbose || is_posix || beQuiet) {
2362 * If only one job can run at a time, there's no need for a
2363 * banner, no is there?
2371 * Catch the four signals that POSIX specifies if they aren't ignored.
2372 * JobCatchSignal will just set global variables and hope someone
2373 * else is going to handle the interrupt.
2375 sa.sa_handler = JobCatchSig;
2376 sigemptyset(&sa.sa_mask);
2379 if (signal(SIGINT, SIG_IGN) != SIG_IGN) {
2380 sigaction(SIGINT, &sa, NULL);
2382 if (signal(SIGHUP, SIG_IGN) != SIG_IGN) {
2383 sigaction(SIGHUP, &sa, NULL);
2385 if (signal(SIGQUIT, SIG_IGN) != SIG_IGN) {
2386 sigaction(SIGQUIT, &sa, NULL);
2388 if (signal(SIGTERM, SIG_IGN) != SIG_IGN) {
2389 sigaction(SIGTERM, &sa, NULL);
2392 * There are additional signals that need to be caught and passed if
2393 * either the export system wants to be told directly of signals or if
2394 * we're giving each job its own process group (since then it won't get
2395 * signals from the terminal driver as we own the terminal)
2397 #if defined(USE_PGRP)
2398 if (signal(SIGTSTP, SIG_IGN) != SIG_IGN) {
2399 sigaction(SIGTSTP, &sa, NULL);
2401 if (signal(SIGTTOU, SIG_IGN) != SIG_IGN) {
2402 sigaction(SIGTTOU, &sa, NULL);
2404 if (signal(SIGTTIN, SIG_IGN) != SIG_IGN) {
2405 sigaction(SIGTTIN, &sa, NULL);
2407 if (signal(SIGWINCH, SIG_IGN) != SIG_IGN) {
2408 sigaction(SIGWINCH, &sa, NULL);
2413 if ((kqfd = kqueue()) == -1) {
2414 Punt("kqueue: %s", strerror(errno));
2418 begin = Targ_FindNode(".BEGIN", TARG_NOCREATE);
2420 if (begin != NULL) {
2421 JobStart(begin, JOB_SPECIAL, (Job *)NULL);
2424 Job_CatchChildren(!usePipes);
2427 postCommands = Targ_FindNode(".END", TARG_CREATE);
2432 * See if the job table is full. It is considered full if it is OR
2433 * if we are in the process of aborting OR if we have
2434 * reached/exceeded our local quota. This prevents any more jobs
2438 * TRUE if the job table is full, FALSE otherwise
2448 if (fifoFd >= 0 && jobFull) {
2449 i = read(fifoFd, &c, 1);
2460 * See if the job table is empty. Because the local concurrency may
2461 * be set to 0, it is possible for the job table to become empty,
2462 * while the list of stoppedJobs remains non-empty. In such a case,
2463 * we want to restart as many jobs as we can.
2466 * TRUE if it is. FALSE if it ain't.
2472 if (!TAILQ_EMPTY(&stoppedJobs) && !aborting) {
2474 * The job table is obviously not full if it has no
2475 * jobs in it...Try and restart the stopped jobs.
2490 * Handle the receipt of an interrupt.
2493 * All children are killed. Another job will be started if the
2494 * .INTERRUPT target was given.
2497 JobInterrupt(int runINTERRUPT, int signo)
2499 Job *job; /* job descriptor in that element */
2500 GNode *interrupt; /* the node describing the .INTERRUPT target */
2502 aborting = ABORT_INTERRUPT;
2504 TAILQ_FOREACH(job, &jobs, link) {
2505 if (!Targ_Precious(job->node)) {
2506 char *file = (job->node->path == NULL ?
2507 job->node->name : job->node->path);
2509 if (!noExecute && eunlink(file) != -1) {
2510 Error("*** %s removed", file);
2514 DEBUGF(JOB, ("JobInterrupt passing signal to child "
2515 "%jd.\n", (intmax_t)job->pid));
2516 KILL(job->pid, signo);
2520 if (runINTERRUPT && !touchFlag) {
2522 * clear the interrupted flag because we would get an
2523 * infinite loop otherwise.
2527 interrupt = Targ_FindNode(".INTERRUPT", TARG_NOCREATE);
2528 if (interrupt != NULL) {
2529 ignoreErrors = FALSE;
2531 JobStart(interrupt, JOB_IGNDOTS, (Job *)NULL);
2534 Job_CatchChildren(!usePipes);
2544 * Do final processing such as the running of the commands
2545 * attached to the .END target.
2554 if (postCommands != NULL && !Lst_IsEmpty(&postCommands->commands)) {
2556 Error("Errors reported so .END ignored");
2558 JobStart(postCommands, JOB_SPECIAL | JOB_IGNDOTS, NULL);
2562 Job_CatchChildren(!usePipes);
2576 * Waits for all running jobs to finish and returns. Sets 'aborting'
2577 * to ABORT_WAIT to prevent other jobs from starting.
2580 * Currently running jobs finish.
2586 aborting = ABORT_WAIT;
2587 while (nJobs != 0) {
2589 Job_CatchChildren(!usePipes);
2596 * Abort all currently running jobs without handling output or anything.
2597 * This function is to be called only in the event of a major
2598 * error. Most definitely NOT to be called from JobInterrupt.
2601 * All children are killed, not just the firstborn
2606 Job *job; /* the job descriptor in that element */
2609 aborting = ABORT_ERROR;
2612 TAILQ_FOREACH(job, &jobs, link) {
2614 * kill the child process with increasingly drastic
2615 * signals to make darn sure it's dead.
2617 KILL(job->pid, SIGINT);
2618 KILL(job->pid, SIGKILL);
2623 * Catch as many children as want to report in at first, then give up
2625 while (waitpid((pid_t)-1, &foo, WNOHANG) > 0)
2631 * Tries to restart stopped jobs if there are slots available.
2632 * Note that this tries to restart them regardless of pending errors.
2633 * It's not good to leave stopped jobs lying around!
2636 * Resumes(and possibly migrates) jobs.
2639 JobRestartJobs(void)
2643 while (!jobFull && (job = TAILQ_FIRST(&stoppedJobs)) != NULL) {
2644 DEBUGF(JOB, ("Job queue is not full. "
2645 "Restarting a stopped job.\n"));
2646 TAILQ_REMOVE(&stoppedJobs, job, link);
2653 * Execute the command in cmd, and return the output of that command
2657 * A string containing the output of the command, or the empty string
2658 * If error is not NULL, it contains the reason for the command failure
2659 * Any output sent to stderr in the child process is passed to stderr,
2660 * and not captured in the string.
2663 * The string must be freed by the caller.
2666 Cmd_Exec(const char *cmd, const char **error)
2668 int fds[2]; /* Pipe streams */
2669 int status; /* command exit status */
2670 Buffer *buf; /* buffer to store the result */
2678 * Open a pipe for fetching its output
2680 if (pipe(fds) == -1) {
2681 *error = "Couldn't create pipe for \"%s\"";
2685 /* Set close-on-exec on read side of pipe. */
2686 fcntl(fds[0], F_SETFD, fcntl(fds[0], F_GETFD) | FD_CLOEXEC);
2688 ps.in = STDIN_FILENO;
2690 ps.err = STDERR_FILENO;
2692 ps.merge_errors = 0;
2696 /* Set up arguments for shell */
2697 ps.argv = emalloc(4 * sizeof(char *));
2698 ps.argv[0] = strdup(commandShell->name);
2699 ps.argv[1] = strdup("-c");
2700 ps.argv[2] = strdup(cmd);
2705 * Fork. Warning since we are doing vfork() instead of fork(),
2706 * do not allocate memory in the child process!
2708 if ((ps.child_pid = vfork()) == -1) {
2709 *error = "Couldn't exec \"%s\"";
2712 } else if (ps.child_pid == 0) {
2725 close(fds[1]); /* No need for the writing half of the pipe. */
2728 char result[BUFSIZ];
2730 rcnt = read(fds[0], result, sizeof(result));
2732 Buf_AddBytes(buf, (size_t)rcnt, (Byte *)result);
2733 } while (rcnt > 0 || (rcnt == -1 && errno == EINTR));
2736 *error = "Error reading shell's output for \"%s\"";
2739 * Close the input side of the pipe.
2743 status = ProcWait(&ps);
2746 *error = "\"%s\" returned non-zero status";
2748 Buf_StripNewlines(buf);
2755 * Interrupt handler - set flag and defer handling to the main code
2758 CompatCatchSig(int signo)
2761 interrupted = signo;
2765 *-----------------------------------------------------------------------
2766 * CompatInterrupt --
2767 * Interrupt the creation of the current target and remove it if
2768 * it ain't precious.
2774 * The target is removed and the process exits. If .INTERRUPT exists,
2775 * its commands are run first WITH INTERRUPTS IGNORED..
2777 *-----------------------------------------------------------------------
2780 CompatInterrupt(int signo)
2783 sigset_t nmask, omask;
2786 sigemptyset(&nmask);
2787 sigaddset(&nmask, SIGINT);
2788 sigaddset(&nmask, SIGTERM);
2789 sigaddset(&nmask, SIGHUP);
2790 sigaddset(&nmask, SIGQUIT);
2791 sigprocmask(SIG_SETMASK, &nmask, &omask);
2793 /* prevent recursion in evaluation of .INTERRUPT */
2796 if (curTarg != NULL && !Targ_Precious(curTarg)) {
2797 const char *file = Var_Value(TARGET, curTarg);
2799 if (!noExecute && eunlink(file) != -1) {
2800 printf("*** %s removed\n", file);
2805 * Run .INTERRUPT only if hit with interrupt signal
2807 if (signo == SIGINT) {
2808 gn = Targ_FindNode(".INTERRUPT", TARG_NOCREATE);
2810 LST_FOREACH(ln, &gn->commands) {
2811 if (Compat_RunCommand(Lst_Datum(ln), gn))
2817 sigprocmask(SIG_SETMASK, &omask, NULL);
2819 if (signo == SIGQUIT)
2821 signal(signo, SIG_DFL);
2822 kill(getpid(), signo);
2829 * Returns NULL if a specified line must be executed by the shell,
2830 * and an argument vector if it can be run via execvp().
2833 * Uses brk_string so destroys the contents of argv.
2836 shellneed(ArgArray *aa, char *cmd)
2841 if (commandShell->meta == NULL || commandShell->builtins.argc <= 1)
2845 if (strpbrk(cmd, commandShell->meta) != NULL)
2849 * Break the command into words to form an argument
2850 * vector we can execute.
2852 brk_string(aa, cmd, TRUE);
2853 for (p = commandShell->builtins.argv + 1; *p != 0; p++) {
2854 if ((ret = strcmp(aa->argv[1], *p)) == 0) {
2855 /* found - use shell */
2864 return (aa->argv + 1);
2868 * Execute the next command for a target. If the command returns an
2869 * error, the node's made field is set to ERROR and creation stops.
2870 * The node from which the command came is also given. This is used
2871 * to execute the commands in compat mode and when executing commands
2872 * with the '+' flag in non-compat mode. In these modes each command
2873 * line should be executed by its own shell. We do some optimisation here:
2874 * if the shell description defines both a string of meta characters and
2875 * a list of builtins and the command line neither contains a meta character
2876 * nor starts with one of the builtins then we execute the command directly
2877 * without invoking a shell.
2880 * 0 if the command succeeded, 1 if an error occurred.
2883 * The node's 'made' field may be set to ERROR.
2886 Compat_RunCommand(char *cmd, GNode *gn)
2889 char *cmdStart; /* Start of expanded command */
2890 Boolean silent; /* Don't print command */
2891 Boolean doit; /* Execute even in -n */
2892 Boolean errCheck; /* Check errors */
2893 int reason; /* Reason for child's death */
2894 int status; /* Description of child's death */
2895 LstNode *cmdNode; /* Node where current cmd is located */
2896 char **av; /* Argument vector for thing to exec */
2899 silent = gn->type & OP_SILENT;
2900 errCheck = !(gn->type & OP_IGNORE);
2903 cmdNode = Lst_Member(&gn->commands, cmd);
2904 cmdStart = Buf_Peel(Var_Subst(cmd, gn, FALSE));
2907 * brk_string will return an argv with a NULL in av[0], thus causing
2908 * execvp() to choke and die horribly. Besides, how can we execute a
2909 * null command? In any case, we warn the user that the command
2910 * expanded to nothing (is this the right thing to do?).
2912 if (*cmdStart == '\0') {
2914 Error("%s expands to empty string", cmd);
2919 Lst_Replace(cmdNode, cmdStart);
2921 if ((gn->type & OP_SAVE_CMDS) && (gn != ENDNode)) {
2922 Lst_AtEnd(&ENDNode->commands, cmdStart);
2924 } else if (strcmp(cmdStart, "...") == 0) {
2925 gn->type |= OP_SAVE_CMDS;
2929 while (*cmd == '@' || *cmd == '-' || *cmd == '+') {
2933 silent = DEBUG(LOUD) ? FALSE : TRUE;
2947 while (isspace((unsigned char)*cmd))
2951 * Print the command before echoing if we're not supposed to be quiet
2952 * for this one. We also print the command if -n given, but not if '+'.
2954 if (!silent || (noExecute && !doit)) {
2955 printf("%s\n", cmd);
2960 * If we're not supposed to execute any commands, this is as far as
2963 if (!doit && noExecute) {
2967 ps.in = STDIN_FILENO;
2968 ps.out = STDOUT_FILENO;
2969 ps.err = STDERR_FILENO;
2971 ps.merge_errors = 0;
2975 if ((av = shellneed(&aa, cmd)) == NULL) {
2977 * Shell meta character or shell builtin found - pass
2978 * command to shell. We give the shell the -e flag as
2979 * well as -c if it is supposed to exit when it hits an error.
2981 ps.argv = emalloc(4 * sizeof(char *));
2982 ps.argv[0] = strdup(commandShell->path);
2983 ps.argv[1] = strdup(errCheck ? "-ec" : "-c");
2984 ps.argv[2] = strdup(cmd);
2991 ps.errCheck = errCheck;
2994 * Warning since we are doing vfork() instead of fork(),
2995 * do not allocate memory in the child process!
2997 if ((ps.child_pid = vfork()) == -1) {
2998 Fatal("Could not fork");
3000 } else if (ps.child_pid == 0) {
3018 * we need to print out the command associated with this
3019 * Gnode in Targ_PrintCmd from Targ_PrintGraph when debugging
3020 * at level g2, in main(), Fatal() and DieHorribly(),
3021 * therefore do not free it when debugging.
3023 if (!DEBUG(GRAPH2)) {
3028 * The child is off and running. Now all we can do is wait...
3030 reason = ProcWait(&ps);
3033 CompatInterrupt(interrupted);
3036 * Decode and report the reason child exited, then
3037 * indicate how we handled it.
3039 if (WIFEXITED(reason)) {
3040 status = WEXITSTATUS(reason);
3044 printf("*** Error code %d", status);
3046 } else if (WIFSTOPPED(reason)) {
3047 status = WSTOPSIG(reason);
3049 status = WTERMSIG(reason);
3050 printf("*** Signal %d", status);
3061 printf(" (continuing)\n");
3066 * Continue executing
3067 * commands for this target.
3068 * If we return 0, this will
3071 printf(" (ignored)\n");
3078 *-----------------------------------------------------------------------
3080 * Make a target, given the parent, to abort if necessary.
3083 * If an error is detected and not being ignored, the process exits.
3085 *-----------------------------------------------------------------------
3088 Compat_Make(GNode *gn, GNode *pgn)
3092 if (gn->type & OP_USE) {
3093 Make_HandleUse(gn, pgn);
3095 } else if (gn->made == UNMADE) {
3097 * First mark ourselves to be made, then apply whatever
3098 * transformations the suffix module thinks are necessary.
3099 * Once that's done, we can descend and make all our children.
3100 * If any of them has an error but the -k flag was given, our
3101 * 'make' field will be set FALSE again. This is our signal to
3102 * not attempt to do anything but abort our parent as well.
3105 gn->made = BEINGMADE;
3107 LST_FOREACH(ln, &gn->children)
3108 Compat_Make(Lst_Datum(ln), gn);
3115 if (Lst_Member(&gn->iParents, pgn) != NULL) {
3116 Var_Set(IMPSRC, Var_Value(TARGET, gn), pgn);
3120 * All the children were made ok. Now cmtime contains the
3121 * modification time of the newest child, we need to find out
3122 * if we exist and when we were modified last. The criteria for
3123 * datedness are defined by the Make_OODate function.
3125 DEBUGF(MAKE, ("Examining %s...", gn->name));
3126 if (!Make_OODate(gn)) {
3127 gn->made = UPTODATE;
3128 DEBUGF(MAKE, ("up-to-date.\n"));
3131 DEBUGF(MAKE, ("out-of-date.\n"));
3135 * If the user is just seeing if something is out-of-date,
3136 * exit now to tell him/her "yes".
3143 * We need to be re-made. We also have to make sure we've got
3144 * a $? variable. To be nice, we also define the $> variable
3145 * using Make_DoAllVar().
3150 * Alter our type to tell if errors should be ignored or things
3151 * should not be printed so Compat_RunCommand knows what to do.
3153 if (Targ_Ignore(gn)) {
3154 gn->type |= OP_IGNORE;
3156 if (Targ_Silent(gn)) {
3157 gn->type |= OP_SILENT;
3160 if (Job_CheckCommands(gn, Fatal)) {
3162 * Our commands are ok, but we still have to worry
3163 * about the -t flag...
3167 LST_FOREACH(ln, &gn->commands) {
3168 if (Compat_RunCommand(Lst_Datum(ln),
3174 Job_Touch(gn, gn->type & OP_SILENT);
3180 if (gn->made != ERROR) {
3182 * If the node was made successfully, mark it so, update
3183 * its modification time and timestamp all its parents.
3184 * Note that for .ZEROTIME targets, the timestamping
3185 * isn't done. This is to keep its state from affecting
3186 * that of its parent.
3191 * We can't re-stat the thing, but we can at least take
3192 * care of rules where a target depends on a source that
3193 * actually creates the target, but only if it has
3201 * mv y.tab.o parse.o
3202 * cmp -s y.tab.h parse.h || mv y.tab.h parse.h
3204 * In this case, if the definitions produced by yacc
3205 * haven't changed from before, parse.h won't have been
3206 * updated and gn->mtime will reflect the current
3207 * modification time for parse.h. This is something of a
3208 * kludge, I admit, but it's a useful one..
3210 * XXX: People like to use a rule like
3214 * To force things that depend on FRC to be made, so we
3215 * have to check for gn->children being empty as well...
3217 if (!Lst_IsEmpty(&gn->commands) ||
3218 Lst_IsEmpty(&gn->children)) {
3223 * This is what Make does and it's actually a good
3224 * thing, as it allows rules like
3226 * cmp -s y.tab.h parse.h || cp y.tab.h parse.h
3228 * to function as intended. Unfortunately, thanks to
3229 * the stateless nature of NFS (and the speed of this
3230 * program), there are times when the modification time
3231 * of a file created on a remote machine will not be
3232 * modified before the stat() implied by the Dir_MTime
3233 * occurs, thus leading us to believe that the file
3234 * is unchanged, wreaking havoc with files that depend
3237 * I have decided it is better to make too much than to
3238 * make too little, so this stuff is commented out
3239 * unless you're sure it's ok.
3242 if (noExecute || Dir_MTime(gn) == 0) {
3245 if (gn->cmtime > gn->mtime)
3246 gn->mtime = gn->cmtime;
3247 DEBUGF(MAKE, ("update time: %s\n",
3248 Targ_FmtTime(gn->mtime)));
3250 if (!(gn->type & OP_EXEC)) {
3251 pgn->childMade = TRUE;
3252 Make_TimeStamp(pgn, gn);
3255 } else if (keepgoing) {
3259 printf("\n\nStop in %s.\n", Var_Value(".CURDIR", gn));
3262 } else if (gn->made == ERROR) {
3264 * Already had an error when making this beastie. Tell the
3269 if (Lst_Member(&gn->iParents, pgn) != NULL) {
3270 Var_Set(IMPSRC, Var_Value(TARGET, gn), pgn);
3274 Error("Graph cycles through %s\n", gn->name);
3279 if ((gn->type & OP_EXEC) == 0) {
3280 pgn->childMade = TRUE;
3281 Make_TimeStamp(pgn, gn);
3285 if ((gn->type & OP_EXEC) == 0) {
3286 Make_TimeStamp(pgn, gn);
3298 * Install signal handlers for Compat_Run
3301 Compat_InstallSignalHandlers(void)
3304 if (signal(SIGINT, SIG_IGN) != SIG_IGN) {
3305 signal(SIGINT, CompatCatchSig);
3307 if (signal(SIGTERM, SIG_IGN) != SIG_IGN) {
3308 signal(SIGTERM, CompatCatchSig);
3310 if (signal(SIGHUP, SIG_IGN) != SIG_IGN) {
3311 signal(SIGHUP, CompatCatchSig);
3313 if (signal(SIGQUIT, SIG_IGN) != SIG_IGN) {
3314 signal(SIGQUIT, CompatCatchSig);
3319 *-----------------------------------------------------------------------
3321 * Start making again, given a list of target nodes.
3329 *-----------------------------------------------------------------------
3332 Compat_Run(Lst *targs)
3334 GNode *gn = NULL; /* Current root target */
3337 Compat_InstallSignalHandlers();
3338 ENDNode = Targ_FindNode(".END", TARG_CREATE);
3340 * If the user has defined a .BEGIN target, execute the commands
3344 gn = Targ_FindNode(".BEGIN", TARG_NOCREATE);
3346 LST_FOREACH(ln, &gn->commands) {
3347 if (Compat_RunCommand(Lst_Datum(ln), gn))
3350 if (gn->made == ERROR) {
3351 printf("\n\nStop.\n");
3358 * For each entry in the list of targets to create, call Compat_Make on
3359 * it to create the thing. Compat_Make will leave the 'made' field of gn
3360 * in one of several states:
3361 * UPTODATE gn was already up-to-date
3362 * MADE gn was recreated successfully
3363 * ERROR An error occurred while gn was being created
3364 * ABORTED gn was not remade because one of its inferiors
3365 * could not be made due to errors.
3368 while (!Lst_IsEmpty(targs)) {
3369 gn = Lst_DeQueue(targs);
3370 Compat_Make(gn, gn);
3372 if (gn->made == UPTODATE) {
3373 printf("`%s' is up to date.\n", gn->name);
3374 } else if (gn->made == ABORTED) {
3375 printf("`%s' not remade because of errors.\n",
3382 * If the user has defined a .END target, run its commands.
3384 if (makeErrors == 0) {
3385 LST_FOREACH(ln, &ENDNode->commands) {
3386 if (Compat_RunCommand(Lst_Datum(ln), ENDNode))