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 volatile 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') {
415 #if __FreeBSD_version < 800041
416 arc4random() % (sizeof(padchar) - 1);
418 arc4random_uniform(sizeof(padchar) - 1);
420 *ptr-- = padchar[rand_num];
424 /* Check the target directory. */
425 for (; ptr > template; --ptr) {
430 if (stat(template, &sbuf) != 0)
433 if (!S_ISDIR(sbuf.st_mode)) {
443 if (mkfifo(template, 0600) == 0) {
446 if ((fd = open(template, O_RDWR, 0600)) < 0) {
453 if (errno != EEXIST) {
459 * If we have a collision, cycle through the space of
462 for (ptr = start;;) {
465 if (*ptr == '\0' || ptr == pathend)
468 pad = strchr(padchar, *ptr);
469 if (pad == NULL || *++pad == '\0') {
481 catch_child(int sig __unused)
491 * Catch SIGCHLD so that we get kicked out of select() when we
492 * need to look at a child. This is only known to matter for the
493 * -j case (perhaps without -P).
495 * XXX this is intentionally misplaced.
499 sigemptyset(&sa.sa_mask);
500 sa.sa_flags = SA_RESTART | SA_NOCLDSTOP;
501 sa.sa_handler = catch_child;
502 sigaction(SIGCHLD, &sa, NULL);
506 * Wait for child process to terminate.
509 ProcWait(ProcStuff *ps)
515 * Wait for the process to exit.
519 if (pid == -1 && errno != EINTR) {
520 Fatal("error in wait: %d", pid);
523 if (pid == ps->child_pid) {
536 * Got a signal. Set global variables and hope that someone will
540 JobCatchSig(int signo)
548 * Pass a signal on to all local jobs if
549 * USE_PGRP is defined, then die ourselves.
552 * We die by the same signal.
555 JobPassSig(int signo)
558 sigset_t nmask, omask;
559 struct sigaction act;
562 sigaddset(&nmask, signo);
563 sigprocmask(SIG_SETMASK, &nmask, &omask);
565 DEBUGF(JOB, ("JobPassSig(%d) called.\n", signo));
566 TAILQ_FOREACH(job, &jobs, link) {
567 DEBUGF(JOB, ("JobPassSig passing signal %d to child %jd.\n",
568 signo, (intmax_t)job->pid));
569 KILL(job->pid, signo);
573 * Deal with proper cleanup based on the signal received. We only run
574 * the .INTERRUPT target if the signal was in fact an interrupt.
575 * The other three termination signals are more of a "get out *now*"
578 if (signo == SIGINT) {
579 JobInterrupt(TRUE, signo);
580 } else if (signo == SIGHUP || signo == SIGTERM || signo == SIGQUIT) {
581 JobInterrupt(FALSE, signo);
585 * Leave gracefully if SIGQUIT, rather than core dumping.
587 if (signo == SIGQUIT) {
592 * Send ourselves the signal now we've given the message to everyone
593 * else. Note we block everything else possible while we're getting
594 * the signal. This ensures that all our jobs get continued when we
595 * wake up before we take any other signal.
596 * XXX this comment seems wrong.
598 act.sa_handler = SIG_DFL;
599 sigemptyset(&act.sa_mask);
601 sigaction(signo, &act, NULL);
603 DEBUGF(JOB, ("JobPassSig passing signal to self, mask = %x.\n",
604 ~0 & ~(1 << (signo - 1))));
605 signal(signo, SIG_DFL);
607 KILL(getpid(), signo);
610 TAILQ_FOREACH(job, &jobs, link) {
611 DEBUGF(JOB, ("JobPassSig passing signal %d to child %jd.\n",
612 signo, (intmax_t)job->pid));
613 KILL(job->pid, signo);
616 sigprocmask(SIG_SETMASK, &omask, NULL);
617 sigprocmask(SIG_SETMASK, &omask, NULL);
618 act.sa_handler = JobPassSig;
619 sigaction(signo, &act, NULL);
624 * Put out another command for the given job. If the command starts
625 * with an @ or a - we process it specially. In the former case,
626 * so long as the -s and -n flags weren't given to make, we stick
627 * a shell-specific echoOff command in the script. In the latter,
628 * we ignore errors for the entire job, unless the shell has error
630 * If the command is just "..." we take all future commands for this
631 * job to be commands to be executed once the entire graph has been
632 * made and return non-zero to signal that the end of the commands
633 * was reached. These commands are later attached to the postCommands
634 * node and executed by Job_Finish when all things are done.
635 * This function is called from JobStart via LST_FOREACH.
638 * Always 0, unless the command was "..."
641 * If the command begins with a '-' and the shell has no error control,
642 * the JOB_IGNERR flag is set in the job descriptor.
643 * If the command is "..." and we're not ignoring such things,
644 * tailCmds is set to the successor node of the cmd.
645 * numCommands is incremented if the command is actually printed.
648 JobPrintCommand(char *cmd, Job *job)
650 Boolean noSpecials; /* true if we shouldn't worry about
651 * inserting special commands into
652 * the input stream. */
653 Boolean shutUp = FALSE; /* true if we put a no echo command
654 * into the command file */
655 Boolean errOff = FALSE; /* true if we turned error checking
656 * off before printing the command
657 * and need to turn it back on */
658 const char *cmdTemplate;/* Template to use when printing the command */
659 char *cmdStart; /* Start of expanded command */
660 LstNode *cmdNode; /* Node for replacing the command */
662 noSpecials = (noExecute && !(job->node->type & OP_MAKE));
664 if (strcmp(cmd, "...") == 0) {
665 job->node->type |= OP_SAVE_CMDS;
666 if ((job->flags & JOB_IGNDOTS) == 0) {
668 Lst_Succ(Lst_Member(&job->node->commands, cmd));
674 #define DBPRINTF(fmt, arg) \
675 DEBUGF(JOB, (fmt, arg)); \
676 fprintf(job->cmdFILE, fmt, arg); \
677 fflush(job->cmdFILE);
682 * For debugging, we replace each command with the result of expanding
683 * the variables in the command.
685 cmdNode = Lst_Member(&job->node->commands, cmd);
687 cmd = Buf_Peel(Var_Subst(cmd, job->node, FALSE));
690 Lst_Replace(cmdNode, cmdStart);
692 cmdTemplate = "%s\n";
695 * Check for leading @', -' or +'s to control echoing, error checking,
696 * and execution on -n.
698 while (*cmd == '@' || *cmd == '-' || *cmd == '+') {
702 shutUp = DEBUG(LOUD) ? FALSE : TRUE;
712 * We're not actually exececuting anything...
713 * but this one needs to be - use compat mode
716 Compat_RunCommand(cmd, job->node);
724 while (isspace((unsigned char)*cmd))
728 if (!(job->flags & JOB_SILENT) && !noSpecials &&
729 commandShell->hasEchoCtl) {
730 DBPRINTF("%s\n", commandShell->echoOff);
737 if (!(job->flags & JOB_IGNERR) && !noSpecials) {
738 if (commandShell->hasErrCtl) {
740 * We don't want the error-control commands
741 * showing up either, so we turn off echoing
742 * while executing them. We could put another
743 * field in the shell structure to tell
744 * JobDoOutput to look for this string too,
745 * but why make it any more complex than
748 if (!(job->flags & JOB_SILENT) && !shutUp &&
749 commandShell->hasEchoCtl) {
750 DBPRINTF("%s\n", commandShell->echoOff);
751 DBPRINTF("%s\n", commandShell->ignErr);
752 DBPRINTF("%s\n", commandShell->echoOn);
754 DBPRINTF("%s\n", commandShell->ignErr);
756 } else if (commandShell->ignErr &&
757 *commandShell->ignErr != '\0') {
759 * The shell has no error control, so we need to
760 * be weird to get it to ignore any errors from
761 * the command. If echoing is turned on, we turn
762 * it off and use the errCheck template to echo
763 * the command. Leave echoing off so the user
764 * doesn't see the weirdness we go through to
765 * ignore errors. Set cmdTemplate to use the
766 * weirdness instead of the simple "%s\n"
769 if (!(job->flags & JOB_SILENT) && !shutUp &&
770 commandShell->hasEchoCtl) {
771 DBPRINTF("%s\n", commandShell->echoOff);
772 DBPRINTF(commandShell->errCheck, cmd);
775 cmdTemplate = commandShell->ignErr;
777 * The error ignoration (hee hee) is already
778 * taken care of by the ignErr template, so
779 * pretend error checking is still on.
790 DBPRINTF(cmdTemplate, cmd);
794 * If echoing is already off, there's no point in issuing the
795 * echoOff command. Otherwise we issue it and pretend it was on
796 * for the whole command...
798 if (!shutUp && !(job->flags & JOB_SILENT) &&
799 commandShell->hasEchoCtl) {
800 DBPRINTF("%s\n", commandShell->echoOff);
803 DBPRINTF("%s\n", commandShell->errCheck);
806 DBPRINTF("%s\n", commandShell->echoOn);
813 * Called to close both input and output pipes when a job is finished.
816 * The file descriptors associated with the job are closed.
823 #if !defined(USE_KQUEUE)
824 FD_CLR(job->inPipe, &outputs);
826 if (job->outPipe != job->inPipe) {
829 JobDoOutput(job, TRUE);
833 JobDoOutput(job, TRUE);
839 * Do final processing for the given job including updating
840 * parents and starting new jobs as available/necessary. Note
841 * that we pay no attention to the JOB_IGNERR flag here.
842 * This is because when we're called because of a noexecute flag
843 * or something, jstat.w_status is 0 and when called from
844 * Job_CatchChildren, the status is zeroed if it s/b ignored.
847 * Some nodes may be put on the toBeMade queue.
848 * Final commands for the job are placed on postCommands.
850 * If we got an error and are aborting (aborting == ABORT_ERROR) and
851 * the job list is now empty, we are done for the day.
852 * If we recognized an error (makeErrors !=0), we set the aborting flag
853 * to ABORT_ERROR so no more jobs will be started.
856 JobFinish(Job *job, int *status)
861 if (WIFEXITED(*status)) {
862 int job_status = WEXITSTATUS(*status);
866 * Deal with ignored errors in -B mode. We need to
867 * print a message telling of the ignored error as
868 * well as setting status.w_status to 0 so the next
869 * command gets run. To do this, we set done to be
870 * TRUE if in -B mode and the job exited non-zero.
872 if (job_status == 0) {
875 if (job->flags & JOB_IGNERR) {
879 * If it exited non-zero and either we're
880 * doing things our way or we're not ignoring
881 * errors, the job is finished. Similarly, if
882 * the shell died because of a signal the job
883 * is also finished. In these cases, finish
884 * out the job's output before printing the
888 if (job->cmdFILE != NULL &&
889 job->cmdFILE != stdout) {
890 fclose(job->cmdFILE);
895 } else if (WIFSIGNALED(*status)) {
896 if (WTERMSIG(*status) == SIGCONT) {
898 * No need to close things down or anything.
903 * If it exited non-zero and either we're
904 * doing things our way or we're not ignoring
905 * errors, the job is finished. Similarly, if
906 * the shell died because of a signal the job
907 * is also finished. In these cases, finish
908 * out the job's output before printing the
912 if (job->cmdFILE != NULL &&
913 job->cmdFILE != stdout) {
914 fclose(job->cmdFILE);
920 * No need to close things down or anything.
925 if (WIFEXITED(*status)) {
926 if (done || DEBUG(JOB)) {
931 (job->flags & JOB_IGNERR)) {
933 * If output is going to a file and this job
934 * is ignoring errors, arrange to have the
935 * exit status sent to the output file as
938 out = fdopen(job->outFd, "w");
940 Punt("Cannot fdopen");
945 DEBUGF(JOB, ("Process %jd exited.\n",
946 (intmax_t)job->pid));
948 if (WEXITSTATUS(*status) == 0) {
950 if (usePipes && job->node != lastNode) {
951 MESSAGE(out, job->node);
952 lastNode = job->node;
955 "*** Completed successfully\n");
958 if (usePipes && job->node != lastNode) {
959 MESSAGE(out, job->node);
960 lastNode = job->node;
962 fprintf(out, "*** Error code %d%s\n",
963 WEXITSTATUS(*status),
964 (job->flags & JOB_IGNERR) ?
967 if (job->flags & JOB_IGNERR) {
974 } else if (WIFSIGNALED(*status)) {
975 if (done || DEBUG(JOB) || (WTERMSIG(*status) == SIGCONT)) {
980 (job->flags & JOB_IGNERR)) {
982 * If output is going to a file and this job
983 * is ignoring errors, arrange to have the
984 * exit status sent to the output file as
987 out = fdopen(job->outFd, "w");
989 Punt("Cannot fdopen");
994 if (WTERMSIG(*status) == SIGCONT) {
996 * If the beastie has continued, shift the
997 * Job from the stopped list to the running
998 * one (or re-stop it if concurrency is
999 * exceeded) and go and get another child.
1001 if (job->flags & (JOB_RESUME | JOB_RESTART)) {
1002 if (usePipes && job->node != lastNode) {
1003 MESSAGE(out, job->node);
1004 lastNode = job->node;
1006 fprintf(out, "*** Continued\n");
1008 if (!(job->flags & JOB_CONTINUING)) {
1009 DEBUGF(JOB, ("Warning: process %jd was not "
1010 "continuing.\n", (intmax_t) job->pid));
1013 * We don't really want to restart a
1014 * job from scratch just because it
1015 * continued, especially not without
1016 * killing the continuing process!
1017 * That's why this is ifdef'ed out.
1023 job->flags &= ~JOB_CONTINUING;
1024 TAILQ_INSERT_TAIL(&jobs, job, link);
1026 DEBUGF(JOB, ("Process %jd is continuing locally.\n",
1027 (intmax_t) job->pid));
1028 if (nJobs == maxJobs) {
1030 DEBUGF(JOB, ("Job queue is full.\n"));
1036 if (usePipes && job->node != lastNode) {
1037 MESSAGE(out, job->node);
1038 lastNode = job->node;
1041 "*** Signal %d\n", WTERMSIG(*status));
1049 if (compatMake && !usePipes && (job->flags & JOB_IGNERR)) {
1051 * If output is going to a file and this job
1052 * is ignoring errors, arrange to have the
1053 * exit status sent to the output file as
1056 out = fdopen(job->outFd, "w");
1058 Punt("Cannot fdopen");
1063 DEBUGF(JOB, ("Process %jd stopped.\n", (intmax_t) job->pid));
1064 if (usePipes && job->node != lastNode) {
1065 MESSAGE(out, job->node);
1066 lastNode = job->node;
1068 fprintf(out, "*** Stopped -- signal %d\n", WSTOPSIG(*status));
1069 job->flags |= JOB_RESUME;
1070 TAILQ_INSERT_TAIL(&stoppedJobs, job, link);
1076 * Now handle the -B-mode stuff. If the beast still isn't finished,
1077 * try and restart the job on the next command. If JobStart says it's
1078 * ok, it's ok. If there's an error, this puppy is done.
1080 if (compatMake && WIFEXITED(*status) &&
1081 Lst_Succ(job->node->compat_command) != NULL) {
1082 switch (JobStart(job->node, job->flags & JOB_IGNDOTS, job)) {
1088 W_SETEXITSTATUS(status, 1);
1092 * If we got back a JOB_FINISHED code, JobStart has
1093 * already called Make_Update and freed the job
1094 * descriptor. We set done to false here to avoid fake
1095 * cycles and double frees. JobStart needs to do the
1096 * update so we can proceed up the graph when given
1108 if (done && aborting != ABORT_ERROR &&
1109 aborting != ABORT_INTERRUPT && *status == 0) {
1111 * As long as we aren't aborting and the job didn't return a
1112 * non-zero status that we shouldn't ignore, we call
1113 * Make_Update to update the parents. In addition, any saved
1114 * commands for the node are placed on the .END target.
1116 for (ln = job->tailCmds; ln != NULL; ln = LST_NEXT(ln)) {
1117 Lst_AtEnd(&postCommands->commands,
1119 Var_Subst(Lst_Datum(ln), job->node, FALSE)));
1122 job->node->made = MADE;
1123 Make_Update(job->node);
1126 } else if (*status != 0) {
1134 * Set aborting if any error.
1136 if (makeErrors && !keepgoing && aborting != ABORT_INTERRUPT) {
1138 * If we found any errors in this batch of children and the -k
1139 * flag wasn't given, we set the aborting flag so no more jobs
1142 aborting = ABORT_ERROR;
1145 if (aborting == ABORT_ERROR && Job_Empty()) {
1147 * If we are aborting and the job table is now empty, we finish.
1155 * Touch the given target. Called by JobStart when the -t flag was
1156 * given. Prints messages unless told to be silent.
1159 * The data modification of the file is changed. In addition, if the
1160 * file did not exist, it is created.
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_EXEC | OP_OPTIONAL)) {
1170 * .JOIN, .USE, .ZEROTIME and .OPTIONAL targets are "virtual"
1171 * targets and, as such, shouldn't really be created.
1177 fprintf(stdout, "touch %s\n", gn->name);
1185 if (gn->type & OP_ARCHV) {
1187 } else if (gn->type & OP_LIB) {
1190 char *file = gn->path ? gn->path : gn->name;
1192 times.actime = times.modtime = now;
1193 if (utime(file, ×) < 0) {
1194 streamID = open(file, O_RDWR | O_CREAT, 0666);
1196 if (streamID >= 0) {
1200 * Read and write a byte to the file to change
1201 * the modification time, then close the file.
1203 if (read(streamID, &c, 1) == 1) {
1204 lseek(streamID, (off_t)0, SEEK_SET);
1205 write(streamID, &c, 1);
1210 fprintf(stdout, "*** couldn't touch %s: %s",
1211 file, strerror(errno));
1220 * Make sure the given node has all the commands it needs.
1223 * TRUE if the commands list is/was ok.
1226 * The node will have commands from the .DEFAULT rule added to it
1230 Job_CheckCommands(GNode *gn, void (*abortProc)(const char *, ...))
1233 if (OP_NOP(gn->type) && Lst_IsEmpty(&gn->commands) &&
1234 (gn->type & OP_LIB) == 0) {
1236 * No commands. Look for .DEFAULT rule from which we might infer
1239 if (DEFAULT != NULL && !Lst_IsEmpty(&DEFAULT->commands)) {
1241 * Make only looks for a .DEFAULT if the node was
1242 * never the target of an operator, so that's what we
1243 * do too. If a .DEFAULT was given, we substitute its
1244 * commands for gn's commands and set the IMPSRC
1245 * variable to be the target's name The DEFAULT node
1246 * acts like a transformation rule, in that gn also
1247 * inherits any attributes or sources attached to
1250 Make_HandleUse(DEFAULT, gn);
1251 Var_Set(IMPSRC, Var_Value(TARGET, gn), gn);
1253 } else if (Dir_MTime(gn) == 0) {
1255 * The node wasn't the target of an operator we have
1256 * no .DEFAULT rule to go on and the target doesn't
1257 * already exist. There's nothing more we can do for
1258 * this branch. If the -k flag wasn't given, we stop
1259 * in our tracks, otherwise we just don't update
1260 * this node's parents so they never get examined.
1262 static const char msg[] =
1263 "make: don't know how to make";
1265 if (gn->type & OP_OPTIONAL) {
1266 fprintf(stdout, "%s %s(ignored)\n",
1269 } else if (keepgoing) {
1270 fprintf(stdout, "%s %s(continuing)\n",
1275 #ifndef WITHOUT_OLD_JOKE
1276 if (strcmp(gn->name,"love") == 0)
1277 (*abortProc)("Not war.");
1280 (*abortProc)("%s %s. Stop",
1291 * Execute the shell for the given job. Called from JobStart and
1295 * A shell is executed, outputs is altered and the Job structure added
1299 JobExec(Job *job, char **argv)
1306 DEBUGF(JOB, ("Running %s\n", job->node->name));
1307 DEBUGF(JOB, ("\tCommand: "));
1308 for (i = 0; argv[i] != NULL; i++) {
1309 DEBUGF(JOB, ("%s ", argv[i]));
1311 DEBUGF(JOB, ("\n"));
1315 * Some jobs produce no output and it's disconcerting to have
1316 * no feedback of their running (since they produce no output, the
1317 * banner with their name in it never appears). This is an attempt to
1318 * provide that feedback, even if nothing follows it.
1320 if (lastNode != job->node && (job->flags & JOB_FIRST) &&
1321 !(job->flags & JOB_SILENT)) {
1322 MESSAGE(stdout, job->node);
1323 lastNode = job->node;
1326 ps.in = FILENO(job->cmdFILE);
1329 * Set up the child's output to be routed through the
1330 * pipe we've created for it.
1332 ps.out = job->outPipe;
1335 * We're capturing output in a file, so we duplicate
1336 * the descriptor to the temporary file into the
1339 ps.out = job->outFd;
1341 ps.err = STDERR_FILENO;
1343 ps.merge_errors = 1;
1351 * Fork. Warning since we are doing vfork() instead of fork(),
1352 * do not allocate memory in the child process!
1354 if ((ps.child_pid = vfork()) == -1) {
1355 Punt("Cannot fork");
1358 } else if (ps.child_pid == 0) {
1372 job->pid = ps.child_pid;
1374 if (usePipes && (job->flags & JOB_FIRST)) {
1376 * The first time a job is run for a node, we set the
1377 * current position in the buffer to the beginning and
1378 * mark another stream to watch in the outputs mask.
1381 struct kevent kev[2];
1385 #if defined(USE_KQUEUE)
1386 EV_SET(&kev[0], job->inPipe, EVFILT_READ, EV_ADD, 0, 0, job);
1387 EV_SET(&kev[1], job->pid, EVFILT_PROC,
1388 EV_ADD | EV_ONESHOT, NOTE_EXIT, 0, NULL);
1389 if (kevent(kqfd, kev, 2, NULL, 0, NULL) != 0) {
1391 * kevent() will fail if the job is already
1394 if (errno != EINTR && errno != EBADF && errno != ESRCH)
1395 Punt("kevent: %s", strerror(errno));
1398 FD_SET(job->inPipe, &outputs);
1399 #endif /* USE_KQUEUE */
1402 if (job->cmdFILE != NULL && job->cmdFILE != stdout) {
1403 fclose(job->cmdFILE);
1404 job->cmdFILE = NULL;
1408 * Now the job is actually running, add it to the table.
1411 TAILQ_INSERT_TAIL(&jobs, job, link);
1412 if (nJobs == maxJobs) {
1419 * Create the argv needed to execute the shell for a given job.
1422 JobMakeArgv(Job *job, char **argv)
1425 static char args[10]; /* For merged arguments */
1427 argv[0] = commandShell->name;
1430 if ((commandShell->exit && *commandShell->exit != '-') ||
1431 (commandShell->echo && *commandShell->echo != '-')) {
1433 * At least one of the flags doesn't have a minus before it, so
1434 * merge them together. Have to do this because the *(&(@*#*&#$#
1435 * Bourne shell thinks its second argument is a file to source.
1436 * Grrrr. Note the ten-character limitation on the combined
1439 sprintf(args, "-%s%s", (job->flags & JOB_IGNERR) ? "" :
1440 commandShell->exit ? commandShell->exit : "",
1441 (job->flags & JOB_SILENT) ? "" :
1442 commandShell->echo ? commandShell->echo : "");
1449 if (!(job->flags & JOB_IGNERR) && commandShell->exit) {
1450 argv[argc] = commandShell->exit;
1453 if (!(job->flags & JOB_SILENT) && commandShell->echo) {
1454 argv[argc] = commandShell->echo;
1463 * Restart a job that stopped for some reason. The job must be neither
1464 * on the jobs nor on the stoppedJobs list.
1467 * jobFull will be set if the job couldn't be run.
1470 JobRestart(Job *job)
1473 if (job->flags & JOB_RESTART) {
1475 * Set up the control arguments to the shell. This is based on
1476 * the flags set earlier for this job. If the JOB_IGNERR flag
1477 * is clear, the 'exit' flag of the commandShell is used to
1478 * cause it to exit upon receiving an error. If the JOB_SILENT
1479 * flag is clear, the 'echo' flag of the commandShell is used
1480 * to get it to start echoing as soon as it starts
1481 * processing commands.
1485 JobMakeArgv(job, argv);
1487 DEBUGF(JOB, ("Restarting %s...", job->node->name));
1488 if (nJobs >= maxJobs && !(job->flags & JOB_SPECIAL)) {
1490 * Not allowed to run -- put it back on the hold
1491 * queue and mark the table full
1493 DEBUGF(JOB, ("holding\n"));
1494 TAILQ_INSERT_HEAD(&stoppedJobs, job, link);
1496 DEBUGF(JOB, ("Job queue is full.\n"));
1500 * Job may be run locally.
1502 DEBUGF(JOB, ("running locally\n"));
1508 * The job has stopped and needs to be restarted.
1509 * Why it stopped, we don't know...
1511 DEBUGF(JOB, ("Resuming %s...", job->node->name));
1512 if ((nJobs < maxJobs || ((job->flags & JOB_SPECIAL) &&
1513 maxJobs == 0)) && nJobs != maxJobs) {
1515 * If we haven't reached the concurrency limit already
1516 * (or the job must be run and maxJobs is 0), it's ok
1522 error = (KILL(job->pid, SIGCONT) != 0);
1526 * Make sure the user knows we've continued
1527 * the beast and actually put the thing in the
1530 job->flags |= JOB_CONTINUING;
1532 W_SETTERMSIG(&status, SIGCONT);
1533 JobFinish(job, &status);
1535 job->flags &= ~(JOB_RESUME|JOB_CONTINUING);
1536 DEBUGF(JOB, ("done\n"));
1538 Error("couldn't resume %s: %s",
1539 job->node->name, strerror(errno));
1541 W_SETEXITSTATUS(&status, 1);
1542 JobFinish(job, &status);
1546 * Job cannot be restarted. Mark the table as full and
1547 * place the job back on the list of stopped jobs.
1549 DEBUGF(JOB, ("table full\n"));
1550 TAILQ_INSERT_HEAD(&stoppedJobs, job, link);
1552 DEBUGF(JOB, ("Job queue is full.\n"));
1559 * Start a target-creation process going for the target described
1560 * by the graph node gn.
1563 * JOB_ERROR if there was an error in the commands, JOB_FINISHED
1564 * if there isn't actually anything left to do for the job and
1565 * JOB_RUNNING if the job has been started.
1568 * A new Job node is created and added to the list of running
1569 * jobs. PMake is forked and a child shell created.
1572 JobStart(GNode *gn, int flags, Job *previous)
1574 Job *job; /* new job descriptor */
1575 char *argv[4]; /* Argument vector to shell */
1576 Boolean cmdsOK; /* true if the nodes commands were all right */
1577 Boolean noExec; /* Set true if we decide not to run the job */
1578 int tfd; /* File descriptor for temp file */
1580 char tfile[sizeof(TMPPAT)];
1583 JobPassSig(interrupted);
1586 if (previous != NULL) {
1587 previous->flags &= ~(JOB_FIRST | JOB_IGNERR | JOB_SILENT);
1590 job = emalloc(sizeof(Job));
1595 job->tailCmds = NULL;
1598 * Set the initial value of the flags for this job based on the global
1599 * ones and the node's attributes... Any flags supplied by the caller
1600 * are also added to the field.
1603 if (Targ_Ignore(gn)) {
1604 job->flags |= JOB_IGNERR;
1606 if (Targ_Silent(gn)) {
1607 job->flags |= JOB_SILENT;
1609 job->flags |= flags;
1612 * Check the commands now so any attributes from .DEFAULT have a chance
1613 * to migrate to the node.
1615 if (!compatMake && (job->flags & JOB_FIRST)) {
1616 cmdsOK = Job_CheckCommands(gn, Error);
1622 * If the -n flag wasn't given, we open up OUR (not the child's)
1623 * temporary file to stuff commands in it. The thing is rd/wr so we
1624 * don't need to reopen it to feed it to the shell. If the -n flag
1625 * *was* given, we just set the file to be stdout. Cute, huh?
1627 if ((gn->type & OP_MAKE) || (!noExecute && !touchFlag)) {
1629 * We're serious here, but if the commands were bogus, we're
1636 strcpy(tfile, TMPPAT);
1637 if ((tfd = mkstemp(tfile)) == -1)
1638 Punt("Cannot create temp file: %s", strerror(errno));
1639 job->cmdFILE = fdopen(tfd, "w+");
1641 if (job->cmdFILE == NULL) {
1643 Punt("Could not open %s", tfile);
1645 fcntl(FILENO(job->cmdFILE), F_SETFD, 1);
1647 * Send the commands to the command file, flush all its
1648 * buffers then rewind and remove the thing.
1653 * Used to be backwards; replace when start doing multiple
1654 * commands per shell.
1658 * Be compatible: If this is the first time for this
1659 * node, verify its commands are ok and open the
1660 * commands list for sequential access by later
1661 * invocations of JobStart. Once that is done, we take
1662 * the next command off the list and print it to the
1663 * command file. If the command was an ellipsis, note
1664 * that there's nothing more to execute.
1666 if (job->flags & JOB_FIRST)
1667 gn->compat_command = Lst_First(&gn->commands);
1669 gn->compat_command =
1670 Lst_Succ(gn->compat_command);
1672 if (gn->compat_command == NULL ||
1673 JobPrintCommand(Lst_Datum(gn->compat_command), job))
1676 if (noExec && !(job->flags & JOB_FIRST)) {
1678 * If we're not going to execute anything, the
1679 * job is done and we need to close down the
1680 * various file descriptors we've opened for
1681 * output, then call JobDoOutput to catch the
1682 * final characters or send the file to the
1683 * screen... Note that the i/o streams are only
1684 * open if this isn't the first job. Note also
1685 * that this could not be done in
1686 * Job_CatchChildren b/c it wasn't clear if
1687 * there were more commands to execute or not...
1693 * We can do all the commands at once. hooray for sanity
1696 LST_FOREACH(ln, &gn->commands) {
1697 if (JobPrintCommand(Lst_Datum(ln), job))
1702 * If we didn't print out any commands to the shell
1703 * script, there's not much point in executing the
1706 if (numCommands == 0) {
1711 } else if (noExecute) {
1713 * Not executing anything -- just print all the commands to
1714 * stdout in one fell swoop. This will still set up
1715 * job->tailCmds correctly.
1717 if (lastNode != gn) {
1718 MESSAGE(stdout, gn);
1721 job->cmdFILE = stdout;
1724 * Only print the commands if they're ok, but don't die if
1725 * they're not -- just let the user know they're bad and keep
1726 * going. It doesn't do any harm in this case and may do
1730 LST_FOREACH(ln, &gn->commands) {
1731 if (JobPrintCommand(Lst_Datum(ln), job))
1736 * Don't execute the shell, thank you.
1742 * Just touch the target and note that no shell should be
1743 * executed. Set cmdFILE to stdout to make life easier. Check
1744 * the commands, too, but don't die if they're no good -- it
1745 * does no harm to keep working up the graph.
1747 job->cmdFILE = stdout;
1748 Job_Touch(gn, job->flags & JOB_SILENT);
1753 * If we're not supposed to execute a shell, don't.
1757 * Unlink and close the command file if we opened one
1759 if (job->cmdFILE != stdout) {
1760 if (job->cmdFILE != NULL)
1761 fclose(job->cmdFILE);
1767 * We only want to work our way up the graph if we aren't here
1768 * because the commands for the job were no good.
1771 if (aborting == 0) {
1772 for (ln = job->tailCmds; ln != NULL;
1773 ln = LST_NEXT(ln)) {
1774 Lst_AtEnd(&postCommands->commands,
1775 Buf_Peel(Var_Subst(Lst_Datum(ln),
1776 job->node, FALSE)));
1778 job->node->made = MADE;
1779 Make_Update(job->node);
1782 return(JOB_FINISHED);
1788 fflush(job->cmdFILE);
1792 * Set up the control arguments to the shell. This is based on the flags
1793 * set earlier for this job.
1795 JobMakeArgv(job, argv);
1798 * If we're using pipes to catch output, create the pipe by which we'll
1799 * get the shell's output. If we're using files, print out that we're
1800 * starting a job and then set up its temporary-file name.
1802 if (!compatMake || (job->flags & JOB_FIRST)) {
1807 Punt("Cannot create pipe: %s", strerror(errno));
1808 job->inPipe = fd[0];
1809 job->outPipe = fd[1];
1810 fcntl(job->inPipe, F_SETFD, 1);
1811 fcntl(job->outPipe, F_SETFD, 1);
1813 fprintf(stdout, "Remaking `%s'\n", gn->name);
1815 strcpy(job->outFile, TMPPAT);
1816 if ((job->outFd = mkstemp(job->outFile)) == -1)
1817 Punt("cannot create temp file: %s",
1819 fcntl(job->outFd, F_SETFD, 1);
1823 if (nJobs >= maxJobs && !(job->flags & JOB_SPECIAL) && maxJobs != 0) {
1825 * We've hit the limit of concurrency, so put the job on hold
1826 * until some other job finishes. Note that the special jobs
1827 * (.BEGIN, .INTERRUPT and .END) may be run even when the
1828 * limit has been reached (e.g. when maxJobs == 0).
1832 DEBUGF(JOB, ("Can only run job locally.\n"));
1833 job->flags |= JOB_RESTART;
1834 TAILQ_INSERT_TAIL(&stoppedJobs, job, link);
1836 if (nJobs >= maxJobs) {
1838 * If we're running this job as a special case
1839 * (see above), at least say the table is full.
1842 DEBUGF(JOB, ("Local job queue is full.\n"));
1846 return (JOB_RUNNING);
1850 JobOutput(Job *job, char *cp, char *endp, int msg)
1854 if (commandShell->noPrint) {
1855 ecp = strstr(cp, commandShell->noPrint);
1856 while (ecp != NULL) {
1859 if (msg && job->node != lastNode) {
1860 MESSAGE(stdout, job->node);
1861 lastNode = job->node;
1864 * The only way there wouldn't be a newline
1865 * after this line is if it were the last in
1866 * the buffer. However, since the non-printable
1867 * comes after it, there must be a newline, so
1868 * we don't print one.
1870 fprintf(stdout, "%s", cp);
1873 cp = ecp + strlen(commandShell->noPrint);
1876 * Still more to print, look again after
1877 * skipping the whitespace following the
1878 * non-printable command....
1881 while (*cp == ' ' || *cp == '\t' ||
1885 ecp = strstr(cp, commandShell->noPrint);
1896 * This function is called at different times depending on
1897 * whether the user has specified that output is to be collected
1898 * via pipes or temporary files. In the former case, we are called
1899 * whenever there is something to read on the pipe. We collect more
1900 * output from the given job and store it in the job's outBuf. If
1901 * this makes up a line, we print it tagged by the job's identifier,
1903 * If output has been collected in a temporary file, we open the
1904 * file and read it line by line, transfering it to our own
1905 * output channel until the file is empty. At which point we
1906 * remove the temporary file.
1907 * In both cases, however, we keep our figurative eye out for the
1908 * 'noPrint' line for the shell from which the output came. If
1909 * we recognize a line, we don't print it. If the command is not
1910 * alone on the line (the character after it is not \0 or \n), we
1911 * do print whatever follows it.
1914 * curPos may be shifted as may the contents of outBuf.
1917 JobDoOutput(Job *job, Boolean finish)
1919 Boolean gotNL = FALSE; /* true if got a newline */
1920 Boolean fbuf; /* true if our buffer filled up */
1921 int nr; /* number of bytes read */
1922 int i; /* auxiliary index into outBuf */
1923 int max; /* limit for i (end of current data) */
1924 int nRead; /* (Temporary) number of bytes read */
1925 FILE *oFILE; /* Stream pointer to shell's output file */
1930 * Read as many bytes as will fit in the buffer.
1936 nRead = read(job->inPipe, &job->outBuf[job->curPos],
1937 JOB_BUFSIZE - job->curPos);
1939 * Check for interrupt here too, because the above read may
1940 * block when the child process is stopped. In this case the
1941 * interrupt will unblock it (we don't use SA_RESTART).
1944 JobPassSig(interrupted);
1947 DEBUGF(JOB, ("JobDoOutput(piperead)"));
1954 * If we hit the end-of-file (the job is dead), we must flush
1955 * its remaining output, so pretend we read a newline if
1956 * there's any output remaining in the buffer.
1957 * Also clear the 'finish' flag so we stop looping.
1959 if (nr == 0 && job->curPos != 0) {
1960 job->outBuf[job->curPos] = '\n';
1963 } else if (nr == 0) {
1968 * Look for the last newline in the bytes we just got. If there
1969 * is one, break out of the loop with 'i' as its index and
1972 max = job->curPos + nr;
1973 for (i = job->curPos + nr - 1; i >= job->curPos; i--) {
1974 if (job->outBuf[i] == '\n') {
1977 } else if (job->outBuf[i] == '\0') {
1981 job->outBuf[i] = ' ';
1987 if (job->curPos == JOB_BUFSIZE) {
1989 * If we've run out of buffer space, we have
1990 * no choice but to print the stuff. sigh.
1996 if (gotNL || fbuf) {
1998 * Need to send the output to the screen. Null terminate
1999 * it first, overwriting the newline character if there
2000 * was one. So long as the line isn't one we should
2001 * filter (according to the shell description), we print
2002 * the line, preceded by a target banner if this target
2003 * isn't the same as the one for which we last printed
2004 * something. The rest of the data in the buffer are
2005 * then shifted down to the start of the buffer and
2006 * curPos is set accordingly.
2008 job->outBuf[i] = '\0';
2009 if (i >= job->curPos) {
2012 cp = JobOutput(job, job->outBuf,
2013 &job->outBuf[i], FALSE);
2016 * There's still more in that buffer. This time,
2017 * though, we know there's no newline at the
2018 * end, so we add one of our own free will.
2021 if (job->node != lastNode) {
2022 MESSAGE(stdout, job->node);
2023 lastNode = job->node;
2025 fprintf(stdout, "%s%s", cp,
2031 /* shift the remaining characters down */
2032 memcpy(job->outBuf, &job->outBuf[i + 1],
2034 job->curPos = max - (i + 1);
2038 * We have written everything out, so we just
2039 * start over from the start of the buffer.
2040 * No copying. No nothing.
2047 * If the finish flag is true, we must loop until we hit
2048 * end-of-file on the pipe. This is guaranteed to happen
2049 * eventually since the other end of the pipe is now
2050 * closed (we closed it explicitly and the child has
2051 * exited). When we do get an EOF, finish will be set
2052 * FALSE and we'll fall through and out.
2059 * We've been called to retrieve the output of the job from the
2060 * temporary file where it's been squirreled away. This consists
2061 * of opening the file, reading the output line by line, being
2062 * sure not to print the noPrint line for the shell we used,
2063 * then close and remove the temporary file. Very simple.
2065 * Change to read in blocks and do FindSubString type things
2066 * as for pipes? That would allow for "@echo -n..."
2068 oFILE = fopen(job->outFile, "r");
2069 if (oFILE != NULL) {
2070 fprintf(stdout, "Results of making %s:\n",
2074 while (fgets(inLine, sizeof(inLine), oFILE) != NULL) {
2075 char *cp, *endp, *oendp;
2078 oendp = endp = inLine + strlen(inLine);
2079 if (endp[-1] == '\n') {
2082 cp = JobOutput(job, inLine, endp, FALSE);
2085 * There's still more in that buffer. This time,
2086 * though, we know there's no newline at the
2087 * end, so we add one of our own free will.
2089 fprintf(stdout, "%s", cp);
2091 if (endp != oendp) {
2092 fprintf(stdout, "\n");
2097 eunlink(job->outFile);
2104 * Handle the exit of a child. Called from Make_Make.
2107 * The job descriptor is removed from the list of children.
2110 * We do waits, blocking or not, according to the wisdom of our
2111 * caller, until there are no more children to report. For each
2112 * job, call JobFinish to finish things off. This will take care of
2113 * putting jobs on the stoppedJobs queue.
2116 Job_CatchChildren(Boolean block)
2118 pid_t pid; /* pid of dead child */
2119 Job *job; /* job descriptor for dead child */
2120 int status; /* Exit/termination status */
2123 * Don't even bother if we know there's no one around.
2130 pid = waitpid((pid_t)-1, &status,
2131 (block ? 0 : WNOHANG) | WUNTRACED);
2135 DEBUGF(JOB, ("Process %jd exited or stopped.\n",
2138 TAILQ_FOREACH(job, &jobs, link) {
2139 if (job->pid == pid)
2144 if (WIFSIGNALED(status) &&
2145 (WTERMSIG(status) == SIGCONT)) {
2146 TAILQ_FOREACH(job, &jobs, link) {
2147 if (job->pid == pid)
2151 Error("Resumed child (%jd) "
2152 "not in table", (intmax_t)pid);
2155 TAILQ_REMOVE(&stoppedJobs, job, link);
2157 Error("Child (%jd) not in table?",
2162 TAILQ_REMOVE(&jobs, job, link);
2164 if (fifoFd >= 0 && maxJobs > 1) {
2165 write(fifoFd, "+", 1);
2167 if (nJobs >= maxJobs)
2172 DEBUGF(JOB, ("Job queue is no longer full.\n"));
2177 JobFinish(job, &status);
2180 JobPassSig(interrupted);
2185 * Catch the output from our children, if we're using
2186 * pipes do so. Otherwise just block time until we get a
2187 * signal(most likely a SIGCHLD) since there's no point in
2188 * just spinning when there's nothing to do and the reaping
2189 * of a child can wait for a while.
2192 * Output is read from pipes if we're piping.
2193 * -----------------------------------------------------------------------
2197 Job_CatchOutput(int flag __unused)
2199 Job_CatchOutput(int flag)
2205 struct kevent kev[KEV_SIZE];
2208 struct timeval timeout;
2217 if ((nfds = kevent(kqfd, NULL, 0, kev, KEV_SIZE, NULL)) == -1) {
2219 Punt("kevent: %s", strerror(errno));
2221 JobPassSig(interrupted);
2223 for (i = 0; i < nfds; i++) {
2224 if (kev[i].flags & EV_ERROR) {
2225 warnc(kev[i].data, "kevent");
2228 switch (kev[i].filter) {
2230 JobDoOutput(kev[i].udata, FALSE);
2234 * Just wake up and let
2235 * Job_CatchChildren() collect the
2244 timeout.tv_sec = SEL_SEC;
2245 timeout.tv_usec = SEL_USEC;
2246 if (flag && jobFull && fifoFd >= 0)
2247 FD_SET(fifoFd, &readfds);
2249 nfds = select(FD_SETSIZE, &readfds, (fd_set *)NULL,
2250 (fd_set *)NULL, &timeout);
2253 JobPassSig(interrupted);
2256 if (fifoFd >= 0 && FD_ISSET(fifoFd, &readfds)) {
2260 job = TAILQ_FIRST(&jobs);
2261 while (nfds != 0 && job != NULL) {
2262 if (FD_ISSET(job->inPipe, &readfds)) {
2263 JobDoOutput(job, FALSE);
2266 job = TAILQ_NEXT(job, link);
2268 #endif /* !USE_KQUEUE */
2274 * Start the creation of a target. Basically a front-end for
2275 * JobStart used by the Make module.
2278 * Another job is started.
2284 JobStart(gn, 0, NULL);
2293 } else if (!Var_Exists(MAKE_JOB_PREFIX, VAR_GLOBAL)) {
2294 Var_SetGlobal(MAKE_JOB_PREFIX, "---");
2296 targPrefix = Var_Subst("${" MAKE_JOB_PREFIX "}", VAR_GLOBAL, 0)->buf;
2301 * Initialize the process module, given a maximum number of jobs.
2304 * lists and counters are initialized
2307 Job_Init(int maxproc)
2309 GNode *begin; /* node for commands to do at the very start */
2311 struct sigaction sa;
2314 env = getenv("MAKE_JOBS_FIFO");
2316 if (env == NULL && maxproc > 1) {
2318 * We did not find the environment variable so we are the
2319 * leader. Create the fifo, open it, write one char per
2320 * allowed job into the pipe.
2322 fifoFd = mkfifotemp(fifoName);
2327 fcntl(fifoFd, F_SETFL, O_NONBLOCK);
2329 setenv("MAKE_JOBS_FIFO", env, 1);
2330 while (maxproc-- > 0) {
2331 write(fifoFd, "+", 1);
2333 /* The master make does not get a magic token */
2338 } else if (env != NULL) {
2340 * We had the environment variable so we are a slave.
2341 * Open fifo and give ourselves a magic token which represents
2342 * the token our parent make has grabbed to start his make
2343 * process. Otherwise the sub-makes would gobble up tokens and
2344 * the proper number of tokens to specify to -j would depend
2345 * on the depth of the tree and the order of execution.
2347 fifoFd = open(env, O_RDWR, 0);
2349 fcntl(fifoFd, F_SETFL, O_NONBLOCK);
2365 if ((maxJobs == 1 && fifoFd < 0) || !beVerbose || is_posix || beQuiet) {
2367 * If only one job can run at a time, there's no need for a
2368 * banner, no is there?
2376 * Catch the four signals that POSIX specifies if they aren't ignored.
2377 * JobCatchSignal will just set global variables and hope someone
2378 * else is going to handle the interrupt.
2380 sa.sa_handler = JobCatchSig;
2381 sigemptyset(&sa.sa_mask);
2384 if (signal(SIGINT, SIG_IGN) != SIG_IGN) {
2385 sigaction(SIGINT, &sa, NULL);
2387 if (signal(SIGHUP, SIG_IGN) != SIG_IGN) {
2388 sigaction(SIGHUP, &sa, NULL);
2390 if (signal(SIGQUIT, SIG_IGN) != SIG_IGN) {
2391 sigaction(SIGQUIT, &sa, NULL);
2393 if (signal(SIGTERM, SIG_IGN) != SIG_IGN) {
2394 sigaction(SIGTERM, &sa, NULL);
2397 * There are additional signals that need to be caught and passed if
2398 * either the export system wants to be told directly of signals or if
2399 * we're giving each job its own process group (since then it won't get
2400 * signals from the terminal driver as we own the terminal)
2402 #if defined(USE_PGRP)
2403 if (signal(SIGTSTP, SIG_IGN) != SIG_IGN) {
2404 sigaction(SIGTSTP, &sa, NULL);
2406 if (signal(SIGTTOU, SIG_IGN) != SIG_IGN) {
2407 sigaction(SIGTTOU, &sa, NULL);
2409 if (signal(SIGTTIN, SIG_IGN) != SIG_IGN) {
2410 sigaction(SIGTTIN, &sa, NULL);
2412 if (signal(SIGWINCH, SIG_IGN) != SIG_IGN) {
2413 sigaction(SIGWINCH, &sa, NULL);
2418 if ((kqfd = kqueue()) == -1) {
2419 Punt("kqueue: %s", strerror(errno));
2423 begin = Targ_FindNode(".BEGIN", TARG_NOCREATE);
2425 if (begin != NULL) {
2426 JobStart(begin, JOB_SPECIAL, (Job *)NULL);
2429 Job_CatchChildren(!usePipes);
2432 postCommands = Targ_FindNode(".END", TARG_CREATE);
2437 * See if the job table is full. It is considered full if it is OR
2438 * if we are in the process of aborting OR if we have
2439 * reached/exceeded our local quota. This prevents any more jobs
2443 * TRUE if the job table is full, FALSE otherwise
2453 if (fifoFd >= 0 && jobFull) {
2454 i = read(fifoFd, &c, 1);
2465 * See if the job table is empty. Because the local concurrency may
2466 * be set to 0, it is possible for the job table to become empty,
2467 * while the list of stoppedJobs remains non-empty. In such a case,
2468 * we want to restart as many jobs as we can.
2471 * TRUE if it is. FALSE if it ain't.
2477 if (!TAILQ_EMPTY(&stoppedJobs) && !aborting) {
2479 * The job table is obviously not full if it has no
2480 * jobs in it...Try and restart the stopped jobs.
2495 * Handle the receipt of an interrupt.
2498 * All children are killed. Another job will be started if the
2499 * .INTERRUPT target was given.
2502 JobInterrupt(int runINTERRUPT, int signo)
2504 Job *job; /* job descriptor in that element */
2505 GNode *interrupt; /* the node describing the .INTERRUPT target */
2507 aborting = ABORT_INTERRUPT;
2509 TAILQ_FOREACH(job, &jobs, link) {
2510 if (!Targ_Precious(job->node)) {
2511 char *file = (job->node->path == NULL ?
2512 job->node->name : job->node->path);
2514 if (!noExecute && eunlink(file) != -1) {
2515 Error("*** %s removed", file);
2519 DEBUGF(JOB, ("JobInterrupt passing signal to child "
2520 "%jd.\n", (intmax_t)job->pid));
2521 KILL(job->pid, signo);
2525 if (runINTERRUPT && !touchFlag) {
2527 * clear the interrupted flag because we would get an
2528 * infinite loop otherwise.
2532 interrupt = Targ_FindNode(".INTERRUPT", TARG_NOCREATE);
2533 if (interrupt != NULL) {
2534 ignoreErrors = FALSE;
2536 JobStart(interrupt, JOB_IGNDOTS, (Job *)NULL);
2539 Job_CatchChildren(!usePipes);
2549 * Do final processing such as the running of the commands
2550 * attached to the .END target.
2559 if (postCommands != NULL && !Lst_IsEmpty(&postCommands->commands)) {
2561 Error("Errors reported so .END ignored");
2563 JobStart(postCommands, JOB_SPECIAL | JOB_IGNDOTS, NULL);
2567 Job_CatchChildren(!usePipes);
2581 * Waits for all running jobs to finish and returns. Sets 'aborting'
2582 * to ABORT_WAIT to prevent other jobs from starting.
2585 * Currently running jobs finish.
2591 aborting = ABORT_WAIT;
2592 while (nJobs != 0) {
2594 Job_CatchChildren(!usePipes);
2601 * Abort all currently running jobs without handling output or anything.
2602 * This function is to be called only in the event of a major
2603 * error. Most definitely NOT to be called from JobInterrupt.
2606 * All children are killed, not just the firstborn
2611 Job *job; /* the job descriptor in that element */
2614 aborting = ABORT_ERROR;
2617 TAILQ_FOREACH(job, &jobs, link) {
2619 * kill the child process with increasingly drastic
2620 * signals to make darn sure it's dead.
2622 KILL(job->pid, SIGINT);
2623 KILL(job->pid, SIGKILL);
2628 * Catch as many children as want to report in at first, then give up
2630 while (waitpid((pid_t)-1, &foo, WNOHANG) > 0)
2636 * Tries to restart stopped jobs if there are slots available.
2637 * Note that this tries to restart them regardless of pending errors.
2638 * It's not good to leave stopped jobs lying around!
2641 * Resumes(and possibly migrates) jobs.
2644 JobRestartJobs(void)
2648 while (!jobFull && (job = TAILQ_FIRST(&stoppedJobs)) != NULL) {
2649 DEBUGF(JOB, ("Job queue is not full. "
2650 "Restarting a stopped job.\n"));
2651 TAILQ_REMOVE(&stoppedJobs, job, link);
2658 * Execute the command in cmd, and return the output of that command
2662 * A string containing the output of the command, or the empty string
2663 * If error is not NULL, it contains the reason for the command failure
2664 * Any output sent to stderr in the child process is passed to stderr,
2665 * and not captured in the string.
2668 * The string must be freed by the caller.
2671 Cmd_Exec(const char *cmd, const char **error)
2673 int fds[2]; /* Pipe streams */
2674 int status; /* command exit status */
2675 Buffer *buf; /* buffer to store the result */
2683 * Open a pipe for fetching its output
2685 if (pipe(fds) == -1) {
2686 *error = "Couldn't create pipe for \"%s\"";
2690 /* Set close-on-exec on read side of pipe. */
2691 fcntl(fds[0], F_SETFD, fcntl(fds[0], F_GETFD) | FD_CLOEXEC);
2693 ps.in = STDIN_FILENO;
2695 ps.err = STDERR_FILENO;
2697 ps.merge_errors = 0;
2701 /* Set up arguments for shell */
2702 ps.argv = emalloc(4 * sizeof(char *));
2703 ps.argv[0] = strdup(commandShell->name);
2704 ps.argv[1] = strdup("-c");
2705 ps.argv[2] = strdup(cmd);
2710 * Fork. Warning since we are doing vfork() instead of fork(),
2711 * do not allocate memory in the child process!
2713 if ((ps.child_pid = vfork()) == -1) {
2714 *error = "Couldn't exec \"%s\"";
2717 } else if (ps.child_pid == 0) {
2730 close(fds[1]); /* No need for the writing half of the pipe. */
2733 char result[BUFSIZ];
2735 rcnt = read(fds[0], result, sizeof(result));
2737 Buf_AddBytes(buf, (size_t)rcnt, (Byte *)result);
2738 } while (rcnt > 0 || (rcnt == -1 && errno == EINTR));
2741 *error = "Error reading shell's output for \"%s\"";
2744 * Close the input side of the pipe.
2748 status = ProcWait(&ps);
2751 *error = "\"%s\" returned non-zero status";
2753 Buf_StripNewlines(buf);
2760 * Interrupt handler - set flag and defer handling to the main code
2763 CompatCatchSig(int signo)
2766 interrupted = signo;
2770 *-----------------------------------------------------------------------
2771 * CompatInterrupt --
2772 * Interrupt the creation of the current target and remove it if
2773 * it ain't precious.
2779 * The target is removed and the process exits. If .INTERRUPT exists,
2780 * its commands are run first WITH INTERRUPTS IGNORED..
2782 *-----------------------------------------------------------------------
2785 CompatInterrupt(int signo)
2788 sigset_t nmask, omask;
2791 sigemptyset(&nmask);
2792 sigaddset(&nmask, SIGINT);
2793 sigaddset(&nmask, SIGTERM);
2794 sigaddset(&nmask, SIGHUP);
2795 sigaddset(&nmask, SIGQUIT);
2796 sigprocmask(SIG_SETMASK, &nmask, &omask);
2798 /* prevent recursion in evaluation of .INTERRUPT */
2801 if (curTarg != NULL && !Targ_Precious(curTarg)) {
2802 const char *file = Var_Value(TARGET, curTarg);
2804 if (!noExecute && eunlink(file) != -1) {
2805 printf("*** %s removed\n", file);
2810 * Run .INTERRUPT only if hit with interrupt signal
2812 if (signo == SIGINT) {
2813 gn = Targ_FindNode(".INTERRUPT", TARG_NOCREATE);
2815 LST_FOREACH(ln, &gn->commands) {
2816 if (Compat_RunCommand(Lst_Datum(ln), gn))
2822 sigprocmask(SIG_SETMASK, &omask, NULL);
2824 if (signo == SIGQUIT)
2826 signal(signo, SIG_DFL);
2827 kill(getpid(), signo);
2834 * Returns NULL if a specified line must be executed by the shell,
2835 * and an argument vector if it can be run via execvp().
2838 * Uses brk_string so destroys the contents of argv.
2841 shellneed(ArgArray *aa, char *cmd)
2846 if (commandShell->meta == NULL || commandShell->builtins.argc <= 1)
2850 if (strpbrk(cmd, commandShell->meta) != NULL)
2854 * Break the command into words to form an argument
2855 * vector we can execute.
2857 brk_string(aa, cmd, TRUE);
2858 for (p = commandShell->builtins.argv + 1; *p != 0; p++) {
2859 if ((ret = strcmp(aa->argv[1], *p)) == 0) {
2860 /* found - use shell */
2869 return (aa->argv + 1);
2873 * Execute the next command for a target. If the command returns an
2874 * error, the node's made field is set to ERROR and creation stops.
2875 * The node from which the command came is also given. This is used
2876 * to execute the commands in compat mode and when executing commands
2877 * with the '+' flag in non-compat mode. In these modes each command
2878 * line should be executed by its own shell. We do some optimisation here:
2879 * if the shell description defines both a string of meta characters and
2880 * a list of builtins and the command line neither contains a meta character
2881 * nor starts with one of the builtins then we execute the command directly
2882 * without invoking a shell.
2885 * 0 if the command succeeded, 1 if an error occurred.
2888 * The node's 'made' field may be set to ERROR.
2891 Compat_RunCommand(char *cmd, GNode *gn)
2894 char *cmdStart; /* Start of expanded command */
2895 Boolean silent; /* Don't print command */
2896 Boolean doit; /* Execute even in -n */
2897 Boolean errCheck; /* Check errors */
2898 int reason; /* Reason for child's death */
2899 int status; /* Description of child's death */
2900 LstNode *cmdNode; /* Node where current cmd is located */
2901 char **av; /* Argument vector for thing to exec */
2904 silent = gn->type & OP_SILENT;
2905 errCheck = !(gn->type & OP_IGNORE);
2908 cmdNode = Lst_Member(&gn->commands, cmd);
2909 cmdStart = Buf_Peel(Var_Subst(cmd, gn, FALSE));
2912 * brk_string will return an argv with a NULL in av[0], thus causing
2913 * execvp() to choke and die horribly. Besides, how can we execute a
2914 * null command? In any case, we warn the user that the command
2915 * expanded to nothing (is this the right thing to do?).
2917 if (*cmdStart == '\0') {
2919 Error("%s expands to empty string", cmd);
2924 Lst_Replace(cmdNode, cmdStart);
2926 if ((gn->type & OP_SAVE_CMDS) && (gn != ENDNode)) {
2927 Lst_AtEnd(&ENDNode->commands, cmdStart);
2929 } else if (strcmp(cmdStart, "...") == 0) {
2930 gn->type |= OP_SAVE_CMDS;
2934 while (*cmd == '@' || *cmd == '-' || *cmd == '+') {
2938 silent = DEBUG(LOUD) ? FALSE : TRUE;
2952 while (isspace((unsigned char)*cmd))
2956 * Print the command before echoing if we're not supposed to be quiet
2957 * for this one. We also print the command if -n given, but not if '+'.
2959 if (!silent || (noExecute && !doit)) {
2960 printf("%s\n", cmd);
2965 * If we're not supposed to execute any commands, this is as far as
2968 if (!doit && noExecute) {
2972 ps.in = STDIN_FILENO;
2973 ps.out = STDOUT_FILENO;
2974 ps.err = STDERR_FILENO;
2976 ps.merge_errors = 0;
2980 if ((av = shellneed(&aa, cmd)) == NULL) {
2982 * Shell meta character or shell builtin found - pass
2983 * command to shell. We give the shell the -e flag as
2984 * well as -c if it is supposed to exit when it hits an error.
2986 ps.argv = emalloc(4 * sizeof(char *));
2987 ps.argv[0] = strdup(commandShell->path);
2988 ps.argv[1] = strdup(errCheck ? "-ec" : "-c");
2989 ps.argv[2] = strdup(cmd);
2996 ps.errCheck = errCheck;
2999 * Warning since we are doing vfork() instead of fork(),
3000 * do not allocate memory in the child process!
3002 if ((ps.child_pid = vfork()) == -1) {
3003 Fatal("Could not fork");
3005 } else if (ps.child_pid == 0) {
3023 * we need to print out the command associated with this
3024 * Gnode in Targ_PrintCmd from Targ_PrintGraph when debugging
3025 * at level g2, in main(), Fatal() and DieHorribly(),
3026 * therefore do not free it when debugging.
3028 if (!DEBUG(GRAPH2)) {
3033 * The child is off and running. Now all we can do is wait...
3035 reason = ProcWait(&ps);
3038 CompatInterrupt(interrupted);
3041 * Decode and report the reason child exited, then
3042 * indicate how we handled it.
3044 if (WIFEXITED(reason)) {
3045 status = WEXITSTATUS(reason);
3049 printf("*** Error code %d", status);
3051 } else if (WIFSTOPPED(reason)) {
3052 status = WSTOPSIG(reason);
3054 status = WTERMSIG(reason);
3055 printf("*** Signal %d", status);
3066 printf(" (continuing)\n");
3071 * Continue executing
3072 * commands for this target.
3073 * If we return 0, this will
3076 printf(" (ignored)\n");
3083 *-----------------------------------------------------------------------
3085 * Make a target, given the parent, to abort if necessary.
3088 * If an error is detected and not being ignored, the process exits.
3090 *-----------------------------------------------------------------------
3093 Compat_Make(GNode *gn, GNode *pgn)
3097 if (gn->type & OP_USE) {
3098 Make_HandleUse(gn, pgn);
3100 } else if (gn->made == UNMADE) {
3102 * First mark ourselves to be made, then apply whatever
3103 * transformations the suffix module thinks are necessary.
3104 * Once that's done, we can descend and make all our children.
3105 * If any of them has an error but the -k flag was given, our
3106 * 'make' field will be set FALSE again. This is our signal to
3107 * not attempt to do anything but abort our parent as well.
3110 gn->made = BEINGMADE;
3112 LST_FOREACH(ln, &gn->children)
3113 Compat_Make(Lst_Datum(ln), gn);
3120 if (Lst_Member(&gn->iParents, pgn) != NULL) {
3121 Var_Set(IMPSRC, Var_Value(TARGET, gn), pgn);
3125 * All the children were made ok. Now cmtime contains the
3126 * modification time of the newest child, we need to find out
3127 * if we exist and when we were modified last. The criteria for
3128 * datedness are defined by the Make_OODate function.
3130 DEBUGF(MAKE, ("Examining %s...", gn->name));
3131 if (!Make_OODate(gn)) {
3132 gn->made = UPTODATE;
3133 DEBUGF(MAKE, ("up-to-date.\n"));
3136 DEBUGF(MAKE, ("out-of-date.\n"));
3140 * If the user is just seeing if something is out-of-date,
3141 * exit now to tell him/her "yes".
3148 * We need to be re-made. We also have to make sure we've got
3149 * a $? variable. To be nice, we also define the $> variable
3150 * using Make_DoAllVar().
3155 * Alter our type to tell if errors should be ignored or things
3156 * should not be printed so Compat_RunCommand knows what to do.
3158 if (Targ_Ignore(gn)) {
3159 gn->type |= OP_IGNORE;
3161 if (Targ_Silent(gn)) {
3162 gn->type |= OP_SILENT;
3165 if (Job_CheckCommands(gn, Fatal)) {
3167 * Our commands are ok, but we still have to worry
3168 * about the -t flag...
3172 LST_FOREACH(ln, &gn->commands) {
3173 if (Compat_RunCommand(Lst_Datum(ln),
3179 Job_Touch(gn, gn->type & OP_SILENT);
3185 if (gn->made != ERROR) {
3187 * If the node was made successfully, mark it so, update
3188 * its modification time and timestamp all its parents.
3189 * Note that for .ZEROTIME targets, the timestamping
3190 * isn't done. This is to keep its state from affecting
3191 * that of its parent.
3196 * We can't re-stat the thing, but we can at least take
3197 * care of rules where a target depends on a source that
3198 * actually creates the target, but only if it has
3206 * mv y.tab.o parse.o
3207 * cmp -s y.tab.h parse.h || mv y.tab.h parse.h
3209 * In this case, if the definitions produced by yacc
3210 * haven't changed from before, parse.h won't have been
3211 * updated and gn->mtime will reflect the current
3212 * modification time for parse.h. This is something of a
3213 * kludge, I admit, but it's a useful one..
3215 * XXX: People like to use a rule like
3219 * To force things that depend on FRC to be made, so we
3220 * have to check for gn->children being empty as well...
3222 if (!Lst_IsEmpty(&gn->commands) ||
3223 Lst_IsEmpty(&gn->children)) {
3228 * This is what Make does and it's actually a good
3229 * thing, as it allows rules like
3231 * cmp -s y.tab.h parse.h || cp y.tab.h parse.h
3233 * to function as intended. Unfortunately, thanks to
3234 * the stateless nature of NFS (and the speed of this
3235 * program), there are times when the modification time
3236 * of a file created on a remote machine will not be
3237 * modified before the stat() implied by the Dir_MTime
3238 * occurs, thus leading us to believe that the file
3239 * is unchanged, wreaking havoc with files that depend
3242 * I have decided it is better to make too much than to
3243 * make too little, so this stuff is commented out
3244 * unless you're sure it's ok.
3247 if (noExecute || Dir_MTime(gn) == 0) {
3250 if (gn->cmtime > gn->mtime)
3251 gn->mtime = gn->cmtime;
3252 DEBUGF(MAKE, ("update time: %s\n",
3253 Targ_FmtTime(gn->mtime)));
3255 if (!(gn->type & OP_EXEC)) {
3256 pgn->childMade = TRUE;
3257 Make_TimeStamp(pgn, gn);
3260 } else if (keepgoing) {
3264 printf("\n\nStop in %s.\n", Var_Value(".CURDIR", gn));
3267 } else if (gn->made == ERROR) {
3269 * Already had an error when making this beastie. Tell the
3274 if (Lst_Member(&gn->iParents, pgn) != NULL) {
3275 Var_Set(IMPSRC, Var_Value(TARGET, gn), pgn);
3279 Error("Graph cycles through %s\n", gn->name);
3284 if ((gn->type & OP_EXEC) == 0) {
3285 pgn->childMade = TRUE;
3286 Make_TimeStamp(pgn, gn);
3290 if ((gn->type & OP_EXEC) == 0) {
3291 Make_TimeStamp(pgn, gn);
3303 * Install signal handlers for Compat_Run
3306 Compat_InstallSignalHandlers(void)
3309 if (signal(SIGINT, SIG_IGN) != SIG_IGN) {
3310 signal(SIGINT, CompatCatchSig);
3312 if (signal(SIGTERM, SIG_IGN) != SIG_IGN) {
3313 signal(SIGTERM, CompatCatchSig);
3315 if (signal(SIGHUP, SIG_IGN) != SIG_IGN) {
3316 signal(SIGHUP, CompatCatchSig);
3318 if (signal(SIGQUIT, SIG_IGN) != SIG_IGN) {
3319 signal(SIGQUIT, CompatCatchSig);
3324 *-----------------------------------------------------------------------
3326 * Start making again, given a list of target nodes.
3334 *-----------------------------------------------------------------------
3337 Compat_Run(Lst *targs)
3339 GNode *gn = NULL; /* Current root target */
3342 Compat_InstallSignalHandlers();
3343 ENDNode = Targ_FindNode(".END", TARG_CREATE);
3345 * If the user has defined a .BEGIN target, execute the commands
3349 gn = Targ_FindNode(".BEGIN", TARG_NOCREATE);
3351 LST_FOREACH(ln, &gn->commands) {
3352 if (Compat_RunCommand(Lst_Datum(ln), gn))
3355 if (gn->made == ERROR) {
3356 printf("\n\nStop.\n");
3363 * For each entry in the list of targets to create, call Compat_Make on
3364 * it to create the thing. Compat_Make will leave the 'made' field of gn
3365 * in one of several states:
3366 * UPTODATE gn was already up-to-date
3367 * MADE gn was recreated successfully
3368 * ERROR An error occurred while gn was being created
3369 * ABORTED gn was not remade because one of its inferiors
3370 * could not be made due to errors.
3373 while (!Lst_IsEmpty(targs)) {
3374 gn = Lst_DeQueue(targs);
3375 Compat_Make(gn, gn);
3377 if (gn->made == UPTODATE) {
3378 printf("`%s' is up to date.\n", gn->name);
3379 } else if (gn->made == ABORTED) {
3380 printf("`%s' not remade because of errors.\n",
3387 * If the user has defined a .END target, run its commands.
3389 if (makeErrors == 0) {
3390 LST_FOREACH(ln, &ENDNode->commands) {
3391 if (Compat_RunCommand(Lst_Datum(ln), ENDNode))