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
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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
40 * $FreeBSD: src/usr.bin/make/job.c,v 1.75 2005/02/10 14:32:14 harti Exp $
41 * $DragonFly: src/usr.bin/make/job.c,v 1.121 2005/07/02 10:46:53 okumoto Exp $
50 * handle the creation etc. of our child processes.
53 * Job_Make Start the creation of the given target.
56 * Check for and handle the termination of any children.
57 * This must be called reasonably frequently to keep the
58 * whole make going at a decent clip, since job table
59 * entries aren't removed until their process is caught
60 * this way. Its single argument is TRUE if the function
61 * should block waiting for a child to terminate.
63 * Job_CatchOutput Print any output our children have produced. Should
64 * also be called fairly frequently to keep the user
65 * informed of what's going on. If no output is waiting,
66 * it will block for a time given by the SEL_* constants,
67 * below, or until output is ready.
69 * Job_Init Called to intialize this module. in addition, any
70 * commands attached to the .BEGIN target are executed
71 * before this function returns. Hence, the makefile must
72 * have been parsed before this function is called.
74 * Job_Full Return TRUE if the job table is filled.
76 * Job_Empty Return TRUE if the job table is completely empty.
78 * Job_Finish Perform any final processing which needs doing. This
79 * includes the execution of any commands which have
80 * been/were attached to the .END target. It should only
81 * be called when the job table is empty.
83 * Job_AbortAll Abort all currently running jobs. It doesn't handle
84 * output or do anything for the jobs, just kills them.
85 * It should only be called in an emergency, as it were.
88 * Verify that the commands for a target are ok. Provide
89 * them if necessary and possible.
91 * Job_Touch Update a target without really updating it.
93 * Job_Wait Wait for all currently-running jobs to finish.
96 * The routines in this file implement the full-compatibility
97 * mode of PMake. Most of the special functionality of PMake
98 * is available in this mode. Things not supported:
100 * - friendly variable substitution.
103 * Compat_Run Initialize things for this module and recreate
104 * thems as need creatin'
107 #include <sys/queue.h>
108 #include <sys/types.h>
109 #include <sys/select.h>
110 #include <sys/stat.h>
112 #include <sys/event.h>
114 #include <sys/wait.h>
119 #include <inttypes.h>
135 #include "pathnames.h"
144 #define TMPPAT "/tmp/makeXXXXXXXXXX"
145 #define MKLVL_MAXVAL 500
146 #define MKLVL_ENVVAR "__MKLVL__"
150 * The SEL_ constants determine the maximum amount of time spent in select
151 * before coming out to see if a child has finished. SEL_SEC is the number of
152 * seconds and SEL_USEC is the number of micro-seconds
156 #endif /* !USE_KQUEUE */
159 * Job Table definitions.
161 * The job "table" is kept as a linked Lst in 'jobs', with the number of
162 * active jobs maintained in the 'nJobs' variable. At no time will this
163 * exceed the value of 'maxJobs', initialized by the Job_Init function.
165 * When a job is finished, the Make_Update function is called on each of the
166 * parents of the node which was just remade. This takes care of the upward
167 * traversal of the dependency graph.
169 #define JOB_BUFSIZE 1024
172 pid_t pid; /* The child's process ID */
174 struct GNode *node; /* The target the child is making */
177 * A LstNode for the first command to be saved after the job completes.
178 * This is NULL if there was no "..." in the job's commands.
183 * An FILE* for writing out the commands. This is only
184 * used before the job is actually started.
189 * A word of flags which determine how the module handles errors,
190 * echoing, etc. for the job
192 short flags; /* Flags to control treatment of job */
193 #define JOB_IGNERR 0x001 /* Ignore non-zero exits */
194 #define JOB_SILENT 0x002 /* no output */
195 #define JOB_SPECIAL 0x004 /* Target is a special one. i.e. run it locally
196 * if we can't export it and maxLocal is 0 */
197 #define JOB_IGNDOTS 0x008 /* Ignore "..." lines when processing
199 #define JOB_FIRST 0x020 /* Job is first job for the node */
200 #define JOB_RESTART 0x080 /* Job needs to be completely restarted */
201 #define JOB_RESUME 0x100 /* Job needs to be resumed b/c it stopped,
203 #define JOB_CONTINUING 0x200 /* We are in the process of resuming this job.
204 * Used to avoid infinite recursion between
205 * JobFinish and JobRestart */
207 /* union for handling shell's output */
210 * This part is used when usePipes is true.
211 * The output is being caught via a pipe and the descriptors
212 * of our pipe, an array in which output is line buffered and
213 * the current position in that buffer are all maintained for
218 * Input side of pipe associated with
219 * job's output channel
224 * Output side of pipe associated with job's
230 * Buffer for storing the output of the
233 char op_outBuf[JOB_BUFSIZE + 1];
235 /* Current position in op_outBuf */
240 * If usePipes is false the output is routed to a temporary
241 * file and all that is kept is the name of the file and the
242 * descriptor open to the file.
245 /* Name of file to which shell output was rerouted */
246 char of_outFile[sizeof(TMPPAT)];
249 * Stream open to the output file. Used to funnel all
250 * from a single job to one file while still allowing
251 * multiple shell invocations
256 } output; /* Data for tracking a shell's output */
258 TAILQ_ENTRY(Job) link; /* list link */
261 #define outPipe output.o_pipe.op_outPipe
262 #define inPipe output.o_pipe.op_inPipe
263 #define outBuf output.o_pipe.op_outBuf
264 #define curPos output.o_pipe.op_curPos
265 #define outFile output.o_file.of_outFile
266 #define outFd output.o_file.of_outFd
268 TAILQ_HEAD(JobList, Job);
271 * error handling variables
273 static int errors = 0; /* number of errors reported */
274 static int aborting = 0; /* why is the make aborting? */
275 #define ABORT_ERROR 1 /* Because of an error */
276 #define ABORT_INTERRUPT 2 /* Because it was interrupted */
277 #define ABORT_WAIT 3 /* Waiting for jobs to finish */
280 * XXX: Avoid SunOS bug... FILENO() is fp->_file, and file
281 * is a char! So when we go above 127 we turn negative!
283 #define FILENO(a) ((unsigned)fileno(a))
286 * post-make command processing. The node postCommands is really just the
287 * .END target but we keep it around to avoid having to search for it
290 static GNode *postCommands;
293 * The number of commands actually printed for a target. Should this
294 * number be 0, no shell will be executed.
296 static int numCommands;
299 * Return values from JobStart.
301 #define JOB_RUNNING 0 /* Job is running */
302 #define JOB_ERROR 1 /* Error in starting the job */
303 #define JOB_FINISHED 2 /* The job is already finished */
304 #define JOB_STOPPED 3 /* The job is stopped */
307 * The maximum number of jobs that may run. This is initialize from the
308 * -j argument for the leading make and from the FIFO for sub-makes.
311 static int nJobs; /* The number of children currently running */
313 /* The structures that describe them */
314 static struct JobList jobs = TAILQ_HEAD_INITIALIZER(jobs);
316 static Boolean jobFull; /* Flag to tell when the job table is full. It
317 * is set TRUE when (1) the total number of
318 * running jobs equals the maximum allowed */
320 static int kqfd; /* File descriptor obtained by kqueue() */
322 static fd_set outputs; /* Set of descriptors of pipes connected to
323 * the output channels of children */
326 static GNode *lastNode; /* The node for which output was most recently
328 static const char *targFmt; /* Format string to use to head output from a
329 * job when it's not the most-recent job heard
332 #define TARG_FMT "--- %s ---\n" /* Default format */
333 #define MESSAGE(fp, gn) \
334 fprintf(fp, targFmt, gn->name);
337 * When JobStart attempts to run a job but isn't allowed to
338 * or when Job_CatchChildren detects a job that has
339 * been stopped somehow, the job is placed on the stoppedJobs queue to be run
340 * when the next job finishes.
342 * Lst of Job structures describing jobs that were stopped due to
343 * concurrency limits or externally
345 static struct JobList stoppedJobs = TAILQ_HEAD_INITIALIZER(stoppedJobs);
347 static int fifoFd; /* Fd of our job fifo */
348 static char fifoName[] = "/tmp/make_fifo_XXXXXXXXX";
349 static int fifoMaster;
351 static sig_atomic_t interrupted;
354 #if defined(USE_PGRP) && defined(SYSV)
355 # define KILL(pid, sig) killpg(-(pid), (sig))
357 # if defined(USE_PGRP)
358 # define KILL(pid, sig) killpg((pid), (sig))
360 # define KILL(pid, sig) kill((pid), (sig))
365 * Grmpf... There is no way to set bits of the wait structure
366 * anymore with the stupid W*() macros. I liked the union wait
367 * stuff much more. So, we devise our own macros... This is
368 * really ugly, use dramamine sparingly. You have been warned.
370 #define W_SETMASKED(st, val, fun) \
373 int mask = fun(sh); \
375 for (sh = 0; ((mask >> sh) & 1) == 0; sh++) \
377 *(st) = (*(st) & ~mask) | ((val) << sh); \
380 #define W_SETTERMSIG(st, val) W_SETMASKED(st, val, WTERMSIG)
381 #define W_SETEXITSTATUS(st, val) W_SETMASKED(st, val, WEXITSTATUS)
383 static void JobRestart(Job *);
384 static int JobStart(GNode *, int, Job *);
385 static void JobDoOutput(Job *, Boolean);
386 static void JobInterrupt(int, int);
387 static void JobRestartJobs(void);
388 static int Compat_RunCommand(char *, GNode *, GNode *);
390 static GNode *curTarg = NULL;
393 * Create a fifo file with a uniq filename, and returns a file
394 * descriptor to that fifo.
397 mkfifotemp(char *template)
402 const char padchar[] =
403 "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
405 if (template[0] == '\0') {
406 errno = EINVAL; /* bad input string */
410 /* Find end of template string. */
411 pathend = strchr(template, '\0');
415 * Starting from the end of the template replace spaces with 'X' in
416 * them with random characters until there are no more 'X'.
418 while (ptr >= template && *ptr == 'X') {
419 uint32_t rand_num = arc4random() % (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)
486 * In lieu of a good way to prevent every possible looping in make(1), stop
487 * there from being more than MKLVL_MAXVAL processes forked by make(1), to
488 * prevent a forkbomb from happening, in a dumb and mechanical way.
491 * Creates or modifies enviornment variable MKLVL_ENVVAR via setenv().
494 check_make_level(void)
496 char *value = getenv(MKLVL_ENVVAR);
497 int level = (value == NULL) ? 0 : atoi(value);
500 errc(2, EAGAIN, "Invalid value for recursion level (%d).",
502 } else if (level > MKLVL_MAXVAL) {
503 errc(2, EAGAIN, "Max recursion level (%d) exceeded.",
507 sprintf(new_value, "%d", level + 1);
508 setenv(MKLVL_ENVVAR, new_value, 1);
518 * Catch SIGCHLD so that we get kicked out of select() when we
519 * need to look at a child. This is only known to matter for the
520 * -j case (perhaps without -P).
522 * XXX this is intentionally misplaced.
526 sigemptyset(&sa.sa_mask);
527 sa.sa_flags = SA_RESTART | SA_NOCLDSTOP;
528 sa.sa_handler = catch_child;
529 sigaction(SIGCHLD, &sa, NULL);
535 * get rid of resource limit on file descriptors
539 if (getrlimit(RLIMIT_NOFILE, &rl) == -1) {
542 rl.rlim_cur = rl.rlim_max;
543 if (setrlimit(RLIMIT_NOFILE, &rl) == -1) {
551 * Signal handler - set a variable and defer handling to the main code.
554 catchsignal(int signo)
560 * Catch the four signals that POSIX specifies if they aren't ignored.
563 Proc_Setupsignals(Boolean compat)
567 sigemptyset(&sa.sa_mask);
569 sa.sa_handler = catchsignal;
571 if (signal(SIGHUP, SIG_IGN) != SIG_IGN) {
572 sigaction(SIGHUP, &sa, NULL);
574 if (signal(SIGINT, SIG_IGN) != SIG_IGN) {
575 sigaction(SIGINT, &sa, NULL);
577 if (signal(SIGQUIT, SIG_IGN) != SIG_IGN) {
578 sigaction(SIGQUIT, &sa, NULL);
580 if (signal(SIGTERM, SIG_IGN) != SIG_IGN) {
581 sigaction(SIGTERM, &sa, NULL);
589 * There are additional signals that need to be caught and
590 * passed if either the export system wants to be told
591 * directly of signals or if we're giving each job its own
592 * process group (since then it won't get signals from the
593 * terminal driver as we own the terminal)
596 if (signal(SIGTSTP, SIG_IGN) != SIG_IGN) {
597 sigaction(SIGTSTP, &sa, NULL);
599 if (signal(SIGTTOU, SIG_IGN) != SIG_IGN) {
600 sigaction(SIGTTOU, &sa, NULL);
602 if (signal(SIGTTIN, SIG_IGN) != SIG_IGN) {
603 sigaction(SIGTTIN, &sa, NULL);
605 if (signal(SIGWINCH, SIG_IGN) != SIG_IGN) {
606 sigaction(SIGWINCH, &sa, NULL);
612 * Wait for child process to terminate.
615 ProcWait(ProcStuff *ps)
621 * Wait for the process to exit.
624 pid = waitpid(ps->child_pid, &status, 0);
625 if (pid == -1 && errno != EINTR) {
626 Fatal("error in wait: %d", pid);
629 if (pid == ps->child_pid) {
642 * Pass a signal on to all local jobs if
643 * USE_PGRP is defined, then die ourselves.
646 * We die by the same signal.
649 JobPassSig(int signo)
652 sigset_t nmask, omask;
653 struct sigaction act;
656 sigaddset(&nmask, signo);
657 sigprocmask(SIG_SETMASK, &nmask, &omask);
659 DEBUGF(JOB, ("JobPassSig(%d) called.\n", signo));
660 TAILQ_FOREACH(job, &jobs, link) {
661 DEBUGF(JOB, ("JobPassSig passing signal %d to child %jd.\n",
662 signo, (intmax_t)job->pid));
663 KILL(job->pid, signo);
667 * Deal with proper cleanup based on the signal received. We only run
668 * the .INTERRUPT target if the signal was in fact an interrupt.
669 * The other three termination signals are more of a "get out *now*"
672 if (signo == SIGINT) {
673 JobInterrupt(TRUE, signo);
674 } else if (signo == SIGHUP || signo == SIGTERM || signo == SIGQUIT) {
675 JobInterrupt(FALSE, signo);
679 * Leave gracefully if SIGQUIT, rather than core dumping.
681 if (signo == SIGQUIT) {
686 * Send ourselves the signal now we've given the message to everyone
687 * else. Note we block everything else possible while we're getting
688 * the signal. This ensures that all our jobs get continued when we
689 * wake up before we take any other signal.
690 * XXX this comment seems wrong.
692 act.sa_handler = SIG_DFL;
693 sigemptyset(&act.sa_mask);
695 sigaction(signo, &act, NULL);
697 DEBUGF(JOB, ("JobPassSig passing signal to self, mask = %x.\n",
698 ~0 & ~(1 << (signo - 1))));
700 signal(signo, SIG_DFL);
701 KILL(getpid(), signo);
704 TAILQ_FOREACH(job, &jobs, link) {
705 DEBUGF(JOB, ("JobPassSig passing signal %d to child %jd.\n",
706 signo, (intmax_t)job->pid));
707 KILL(job->pid, signo);
710 sigprocmask(SIG_SETMASK, &omask, NULL);
711 sigprocmask(SIG_SETMASK, &omask, NULL);
712 act.sa_handler = JobPassSig;
713 sigaction(signo, &act, NULL);
718 * Put out another command for the given job. If the command starts
719 * with an @ or a - we process it specially. In the former case,
720 * so long as the -s and -n flags weren't given to make, we stick
721 * a shell-specific echoOff command in the script. In the latter,
722 * we ignore errors for the entire job, unless the shell has error
724 * If the command is just "..." we take all future commands for this
725 * job to be commands to be executed once the entire graph has been
726 * made and return non-zero to signal that the end of the commands
727 * was reached. These commands are later attached to the postCommands
728 * node and executed by Job_Finish when all things are done.
729 * This function is called from JobStart via LST_FOREACH.
732 * Always 0, unless the command was "..."
735 * If the command begins with a '-' and the shell has no error control,
736 * the JOB_IGNERR flag is set in the job descriptor.
737 * If the command is "..." and we're not ignoring such things,
738 * tailCmds is set to the successor node of the cmd.
739 * numCommands is incremented if the command is actually printed.
742 JobPrintCommand(char *cmd, Job *job)
744 struct Shell *shell = job->shell;
745 Boolean noSpecials; /* true if we shouldn't worry about
746 * inserting special commands into
747 * the input stream. */
748 Boolean shutUp = FALSE; /* true if we put a no echo command
749 * into the command file */
750 Boolean errOff = FALSE; /* true if we turned error checking
751 * off before printing the command
752 * and need to turn it back on */
753 const char *cmdTemplate;/* Template to use when printing the command */
754 char *cmdStart; /* Start of expanded command */
755 LstNode *cmdNode; /* Node for replacing the command */
757 noSpecials = (noExecute && !(job->node->type & OP_MAKE));
759 if (strcmp(cmd, "...") == 0) {
760 job->node->type |= OP_SAVE_CMDS;
761 if ((job->flags & JOB_IGNDOTS) == 0) {
763 Lst_Succ(Lst_Member(&job->node->commands, cmd));
769 #define DBPRINTF(fmt, arg) \
770 DEBUGF(JOB, (fmt, arg)); \
771 fprintf(job->cmdFILE, fmt, arg); \
772 fflush(job->cmdFILE);
777 * For debugging, we replace each command with the result of expanding
778 * the variables in the command.
780 cmdNode = Lst_Member(&job->node->commands, cmd);
782 cmd = Buf_Peel(Var_Subst(cmd, job->node, FALSE));
785 Lst_Replace(cmdNode, cmdStart);
787 cmdTemplate = "%s\n";
790 * Check for leading @', -' or +'s to control echoing, error checking,
791 * and execution on -n.
793 while (*cmd == '@' || *cmd == '-' || *cmd == '+') {
797 shutUp = DEBUG(LOUD) ? FALSE : TRUE;
807 * We're not actually exececuting anything...
808 * but this one needs to be - use compat mode
811 Compat_RunCommand(cmd, job->node, NULL);
819 while (isspace((unsigned char)*cmd))
823 if (!(job->flags & JOB_SILENT) && !noSpecials &&
825 DBPRINTF("%s\n", shell->echoOff);
832 if (!(job->flags & JOB_IGNERR) && !noSpecials) {
833 if (shell->hasErrCtl) {
835 * We don't want the error-control commands
836 * showing up either, so we turn off echoing
837 * while executing them. We could put another
838 * field in the shell structure to tell
839 * JobDoOutput to look for this string too,
840 * but why make it any more complex than
843 if (!(job->flags & JOB_SILENT) && !shutUp &&
845 DBPRINTF("%s\n", shell->echoOff);
846 DBPRINTF("%s\n", shell->ignErr);
847 DBPRINTF("%s\n", shell->echoOn);
849 DBPRINTF("%s\n", shell->ignErr);
851 } else if (shell->ignErr &&
852 *shell->ignErr != '\0') {
854 * The shell has no error control, so we need to
855 * be weird to get it to ignore any errors from
856 * the command. If echoing is turned on, we turn
857 * it off and use the errCheck template to echo
858 * the command. Leave echoing off so the user
859 * doesn't see the weirdness we go through to
860 * ignore errors. Set cmdTemplate to use the
861 * weirdness instead of the simple "%s\n"
864 if (!(job->flags & JOB_SILENT) && !shutUp &&
866 DBPRINTF("%s\n", shell->echoOff);
867 DBPRINTF(shell->errCheck, cmd);
870 cmdTemplate = shell->ignErr;
872 * The error ignoration (hee hee) is already
873 * taken care of by the ignErr template, so
874 * pretend error checking is still on.
885 DBPRINTF(cmdTemplate, cmd);
889 * If echoing is already off, there's no point in issuing the
890 * echoOff command. Otherwise we issue it and pretend it was on
891 * for the whole command...
893 if (!shutUp && !(job->flags & JOB_SILENT) &&
895 DBPRINTF("%s\n", shell->echoOff);
898 DBPRINTF("%s\n", shell->errCheck);
901 DBPRINTF("%s\n", shell->echoOn);
908 * Called to close both input and output pipes when a job is finished.
911 * The file descriptors associated with the job are closed.
918 #if !defined(USE_KQUEUE)
919 FD_CLR(job->inPipe, &outputs);
921 if (job->outPipe != job->inPipe) {
924 JobDoOutput(job, TRUE);
928 JobDoOutput(job, TRUE);
934 * Do final processing for the given job including updating
935 * parents and starting new jobs as available/necessary. Note
936 * that we pay no attention to the JOB_IGNERR flag here.
937 * This is because when we're called because of a noexecute flag
938 * or something, jstat.w_status is 0 and when called from
939 * Job_CatchChildren, the status is zeroed if it s/b ignored.
942 * Some nodes may be put on the toBeMade queue.
943 * Final commands for the job are placed on postCommands.
945 * If we got an error and are aborting (aborting == ABORT_ERROR) and
946 * the job list is now empty, we are done for the day.
947 * If we recognized an error (errors !=0), we set the aborting flag
948 * to ABORT_ERROR so no more jobs will be started.
951 JobFinish(Job *job, int *status)
956 if (WIFEXITED(*status)) {
957 int job_status = WEXITSTATUS(*status);
961 * Deal with ignored errors in -B mode. We need to
962 * print a message telling of the ignored error as
963 * well as setting status.w_status to 0 so the next
964 * command gets run. To do this, we set done to be
965 * TRUE if in -B mode and the job exited non-zero.
967 if (job_status == 0) {
970 if (job->flags & JOB_IGNERR) {
974 * If it exited non-zero and either we're
975 * doing things our way or we're not ignoring
976 * errors, the job is finished. Similarly, if
977 * the shell died because of a signal the job
978 * is also finished. In these cases, finish
979 * out the job's output before printing the
983 if (job->cmdFILE != NULL &&
984 job->cmdFILE != stdout) {
985 fclose(job->cmdFILE);
990 } else if (WIFSIGNALED(*status)) {
991 if (WTERMSIG(*status) == SIGCONT) {
993 * No need to close things down or anything.
998 * If it exited non-zero and either we're
999 * doing things our way or we're not ignoring
1000 * errors, the job is finished. Similarly, if
1001 * the shell died because of a signal the job
1002 * is also finished. In these cases, finish
1003 * out the job's output before printing the
1007 if (job->cmdFILE != NULL &&
1008 job->cmdFILE != stdout) {
1009 fclose(job->cmdFILE);
1015 * No need to close things down or anything.
1020 if (WIFEXITED(*status)) {
1021 if (done || DEBUG(JOB)) {
1026 (job->flags & JOB_IGNERR)) {
1028 * If output is going to a file and this job
1029 * is ignoring errors, arrange to have the
1030 * exit status sent to the output file as
1033 out = fdopen(job->outFd, "w");
1035 Punt("Cannot fdopen");
1040 DEBUGF(JOB, ("Process %jd exited.\n",
1041 (intmax_t)job->pid));
1043 if (WEXITSTATUS(*status) == 0) {
1045 if (usePipes && job->node != lastNode) {
1046 MESSAGE(out, job->node);
1047 lastNode = job->node;
1050 "*** Completed successfully\n");
1053 if (usePipes && job->node != lastNode) {
1054 MESSAGE(out, job->node);
1055 lastNode = job->node;
1057 fprintf(out, "*** Error code %d%s\n",
1058 WEXITSTATUS(*status),
1059 (job->flags & JOB_IGNERR) ?
1062 if (job->flags & JOB_IGNERR) {
1069 } else if (WIFSIGNALED(*status)) {
1070 if (done || DEBUG(JOB) || (WTERMSIG(*status) == SIGCONT)) {
1075 (job->flags & JOB_IGNERR)) {
1077 * If output is going to a file and this job
1078 * is ignoring errors, arrange to have the
1079 * exit status sent to the output file as
1082 out = fdopen(job->outFd, "w");
1084 Punt("Cannot fdopen");
1089 if (WTERMSIG(*status) == SIGCONT) {
1091 * If the beastie has continued, shift the
1092 * Job from the stopped list to the running
1093 * one (or re-stop it if concurrency is
1094 * exceeded) and go and get another child.
1096 if (job->flags & (JOB_RESUME | JOB_RESTART)) {
1097 if (usePipes && job->node != lastNode) {
1098 MESSAGE(out, job->node);
1099 lastNode = job->node;
1101 fprintf(out, "*** Continued\n");
1103 if (!(job->flags & JOB_CONTINUING)) {
1104 DEBUGF(JOB, ("Warning: process %jd was not "
1105 "continuing.\n", (intmax_t) job->pid));
1108 * We don't really want to restart a
1109 * job from scratch just because it
1110 * continued, especially not without
1111 * killing the continuing process!
1112 * That's why this is ifdef'ed out.
1118 job->flags &= ~JOB_CONTINUING;
1119 TAILQ_INSERT_TAIL(&jobs, job, link);
1121 DEBUGF(JOB, ("Process %jd is continuing locally.\n",
1122 (intmax_t) job->pid));
1123 if (nJobs == maxJobs) {
1125 DEBUGF(JOB, ("Job queue is full.\n"));
1131 if (usePipes && job->node != lastNode) {
1132 MESSAGE(out, job->node);
1133 lastNode = job->node;
1136 "*** Signal %d\n", WTERMSIG(*status));
1144 if (compatMake && !usePipes && (job->flags & JOB_IGNERR)) {
1146 * If output is going to a file and this job
1147 * is ignoring errors, arrange to have the
1148 * exit status sent to the output file as
1151 out = fdopen(job->outFd, "w");
1153 Punt("Cannot fdopen");
1158 DEBUGF(JOB, ("Process %jd stopped.\n", (intmax_t) job->pid));
1159 if (usePipes && job->node != lastNode) {
1160 MESSAGE(out, job->node);
1161 lastNode = job->node;
1163 fprintf(out, "*** Stopped -- signal %d\n", WSTOPSIG(*status));
1164 job->flags |= JOB_RESUME;
1165 TAILQ_INSERT_TAIL(&stoppedJobs, job, link);
1171 * Now handle the -B-mode stuff. If the beast still isn't finished,
1172 * try and restart the job on the next command. If JobStart says it's
1173 * ok, it's ok. If there's an error, this puppy is done.
1175 if (compatMake && WIFEXITED(*status) &&
1176 Lst_Succ(job->node->compat_command) != NULL) {
1177 switch (JobStart(job->node, job->flags & JOB_IGNDOTS, job)) {
1183 W_SETEXITSTATUS(status, 1);
1187 * If we got back a JOB_FINISHED code, JobStart has
1188 * already called Make_Update and freed the job
1189 * descriptor. We set done to false here to avoid fake
1190 * cycles and double frees. JobStart needs to do the
1191 * update so we can proceed up the graph when given
1203 if (done && aborting != ABORT_ERROR &&
1204 aborting != ABORT_INTERRUPT && *status == 0) {
1206 * As long as we aren't aborting and the job didn't return a
1207 * non-zero status that we shouldn't ignore, we call
1208 * Make_Update to update the parents. In addition, any saved
1209 * commands for the node are placed on the .END target.
1211 for (ln = job->tailCmds; ln != NULL; ln = LST_NEXT(ln)) {
1212 Lst_AtEnd(&postCommands->commands,
1214 Var_Subst(Lst_Datum(ln), job->node, FALSE)));
1217 job->node->made = MADE;
1218 Make_Update(job->node);
1221 } else if (*status != 0) {
1229 * Set aborting if any error.
1231 if (errors && !keepgoing && aborting != ABORT_INTERRUPT) {
1233 * If we found any errors in this batch of children and the -k
1234 * flag wasn't given, we set the aborting flag so no more jobs
1237 aborting = ABORT_ERROR;
1240 if (aborting == ABORT_ERROR && Job_Empty()) {
1242 * If we are aborting and the job table is now empty, we finish.
1250 * Touch the given target. Called by JobStart when the -t flag was
1251 * given. Prints messages unless told to be silent.
1254 * The data modification of the file is changed. In addition, if the
1255 * file did not exist, it is created.
1258 Job_Touch(GNode *gn, Boolean silent)
1260 int streamID; /* ID of stream opened to do the touch */
1261 struct utimbuf times; /* Times for utime() call */
1263 if (gn->type & (OP_JOIN | OP_USE | OP_EXEC | OP_OPTIONAL)) {
1265 * .JOIN, .USE, .ZEROTIME and .OPTIONAL targets are "virtual"
1266 * targets and, as such, shouldn't really be created.
1272 fprintf(stdout, "touch %s\n", gn->name);
1280 if (gn->type & OP_ARCHV) {
1282 } else if (gn->type & OP_LIB) {
1285 char *file = gn->path ? gn->path : gn->name;
1287 times.actime = times.modtime = now;
1288 if (utime(file, ×) < 0) {
1289 streamID = open(file, O_RDWR | O_CREAT, 0666);
1291 if (streamID >= 0) {
1295 * Read and write a byte to the file to change
1296 * the modification time, then close the file.
1298 if (read(streamID, &c, 1) == 1) {
1299 lseek(streamID, (off_t)0, SEEK_SET);
1300 write(streamID, &c, 1);
1305 fprintf(stdout, "*** couldn't touch %s: %s",
1306 file, strerror(errno));
1315 * Make sure the given node has all the commands it needs.
1318 * TRUE if the commands list is/was ok.
1321 * The node will have commands from the .DEFAULT rule added to it
1325 Job_CheckCommands(GNode *gn, void (*abortProc)(const char *, ...))
1328 if (OP_NOP(gn->type) && Lst_IsEmpty(&gn->commands) &&
1329 (gn->type & OP_LIB) == 0) {
1331 * No commands. Look for .DEFAULT rule from which we might infer
1334 if (DEFAULT != NULL && !Lst_IsEmpty(&DEFAULT->commands)) {
1336 * Make only looks for a .DEFAULT if the node was
1337 * never the target of an operator, so that's what we
1338 * do too. If a .DEFAULT was given, we substitute its
1339 * commands for gn's commands and set the IMPSRC
1340 * variable to be the target's name The DEFAULT node
1341 * acts like a transformation rule, in that gn also
1342 * inherits any attributes or sources attached to
1345 Make_HandleUse(DEFAULT, gn);
1346 Var_Set(IMPSRC, Var_Value(TARGET, gn), gn);
1348 } else if (Dir_MTime(gn) == 0) {
1350 * The node wasn't the target of an operator we have
1351 * no .DEFAULT rule to go on and the target doesn't
1352 * already exist. There's nothing more we can do for
1353 * this branch. If the -k flag wasn't given, we stop
1354 * in our tracks, otherwise we just don't update
1355 * this node's parents so they never get examined.
1357 static const char msg[] =
1358 "make: don't know how to make";
1360 if (gn->type & OP_OPTIONAL) {
1361 fprintf(stdout, "%s %s(ignored)\n",
1364 } else if (keepgoing) {
1365 fprintf(stdout, "%s %s(continuing)\n",
1371 if (strcmp(gn->name,"love") == 0)
1372 (*abortProc)("Not war.");
1375 (*abortProc)("%s %s. Stop",
1386 * Execute the shell for the given job. Called from JobStart and
1390 * A shell is executed, outputs is altered and the Job structure added
1394 JobExec(Job *job, char **argv)
1396 struct Shell *shell = job->shell;
1402 DEBUGF(JOB, ("Running %s\n", job->node->name));
1403 DEBUGF(JOB, ("\tCommand: "));
1404 for (i = 0; argv[i] != NULL; i++) {
1405 DEBUGF(JOB, ("%s ", argv[i]));
1407 DEBUGF(JOB, ("\n"));
1411 * Some jobs produce no output and it's disconcerting to have
1412 * no feedback of their running (since they produce no output, the
1413 * banner with their name in it never appears). This is an attempt to
1414 * provide that feedback, even if nothing follows it.
1416 if (lastNode != job->node && (job->flags & JOB_FIRST) &&
1417 !(job->flags & JOB_SILENT)) {
1418 MESSAGE(stdout, job->node);
1419 lastNode = job->node;
1422 ps.in = FILENO(job->cmdFILE);
1425 * Set up the child's output to be routed through the
1426 * pipe we've created for it.
1428 ps.out = job->outPipe;
1431 * We're capturing output in a file, so we duplicate
1432 * the descriptor to the temporary file into the
1435 ps.out = job->outFd;
1437 ps.err = STDERR_FILENO;
1439 ps.merge_errors = 1;
1447 * Fork. Warning since we are doing vfork() instead of fork(),
1448 * do not allocate memory in the child process!
1450 if ((ps.child_pid = vfork()) == -1) {
1451 Punt("Cannot fork");
1453 } else if (ps.child_pid == 0) {
1460 Proc_Exec(&ps, shell);
1467 job->pid = ps.child_pid;
1469 if (usePipes && (job->flags & JOB_FIRST)) {
1471 * The first time a job is run for a node, we set the
1472 * current position in the buffer to the beginning and
1473 * mark another stream to watch in the outputs mask.
1476 struct kevent kev[2];
1480 #if defined(USE_KQUEUE)
1481 EV_SET(&kev[0], job->inPipe, EVFILT_READ, EV_ADD, 0, 0, job);
1482 EV_SET(&kev[1], job->pid, EVFILT_PROC,
1483 EV_ADD | EV_ONESHOT, NOTE_EXIT, 0, NULL);
1484 if (kevent(kqfd, kev, 2, NULL, 0, NULL) != 0) {
1486 * kevent() will fail if the job is already
1489 if (errno != EINTR && errno != EBADF && errno != ESRCH)
1490 Punt("kevent: %s", strerror(errno));
1493 FD_SET(job->inPipe, &outputs);
1494 #endif /* USE_KQUEUE */
1497 if (job->cmdFILE != NULL && job->cmdFILE != stdout) {
1498 fclose(job->cmdFILE);
1499 job->cmdFILE = NULL;
1503 * Now the job is actually running, add it to the table.
1506 TAILQ_INSERT_TAIL(&jobs, job, link);
1507 if (nJobs == maxJobs) {
1515 * Create the argv needed to execute the shell for a given job.
1518 JobMakeArgv(Job *job, char **argv)
1520 struct Shell *shell = job->shell;
1522 static char args[10]; /* For merged arguments */
1524 argv[0] = shell->name;
1527 if ((shell->exit && *shell->exit != '-') ||
1528 (shell->echo && *shell->echo != '-')) {
1530 * At least one of the flags doesn't have a minus before it, so
1531 * merge them together. Have to do this because the *(&(@*#*&#$#
1532 * Bourne shell thinks its second argument is a file to source.
1533 * Grrrr. Note the ten-character limitation on the combined
1536 sprintf(args, "-%s%s", (job->flags & JOB_IGNERR) ? "" :
1537 shell->exit ? shell->exit : "",
1538 (job->flags & JOB_SILENT) ? "" :
1539 shell->echo ? shell->echo : "");
1546 if (!(job->flags & JOB_IGNERR) && shell->exit) {
1547 argv[argc] = shell->exit;
1550 if (!(job->flags & JOB_SILENT) && shell->echo) {
1551 argv[argc] = shell->echo;
1560 * Restart a job that stopped for some reason. The job must be neither
1561 * on the jobs nor on the stoppedJobs list.
1564 * jobFull will be set if the job couldn't be run.
1567 JobRestart(Job *job)
1570 if (job->flags & JOB_RESTART) {
1572 * Set up the control arguments to the shell. This is based on
1573 * the flags set earlier for this job. If the JOB_IGNERR flag
1574 * is clear, the 'exit' flag of the shell is used to
1575 * cause it to exit upon receiving an error. If the JOB_SILENT
1576 * flag is clear, the 'echo' flag of the shell is used
1577 * to get it to start echoing as soon as it starts
1578 * processing commands.
1582 JobMakeArgv(job, argv);
1584 DEBUGF(JOB, ("Restarting %s...", job->node->name));
1585 if (nJobs >= maxJobs && !(job->flags & JOB_SPECIAL)) {
1587 * Not allowed to run -- put it back on the hold
1588 * queue and mark the table full
1590 DEBUGF(JOB, ("holding\n"));
1591 TAILQ_INSERT_HEAD(&stoppedJobs, job, link);
1593 DEBUGF(JOB, ("Job queue is full.\n"));
1597 * Job may be run locally.
1599 DEBUGF(JOB, ("running locally\n"));
1605 * The job has stopped and needs to be restarted.
1606 * Why it stopped, we don't know...
1608 DEBUGF(JOB, ("Resuming %s...", job->node->name));
1609 if ((nJobs < maxJobs || ((job->flags & JOB_SPECIAL) &&
1610 maxJobs == 0)) && nJobs != maxJobs) {
1612 * If we haven't reached the concurrency limit already
1613 * (or the job must be run and maxJobs is 0), it's ok
1619 error = (KILL(job->pid, SIGCONT) != 0);
1623 * Make sure the user knows we've continued
1624 * the beast and actually put the thing in the
1627 job->flags |= JOB_CONTINUING;
1629 W_SETTERMSIG(&status, SIGCONT);
1630 JobFinish(job, &status);
1632 job->flags &= ~(JOB_RESUME|JOB_CONTINUING);
1633 DEBUGF(JOB, ("done\n"));
1635 Error("couldn't resume %s: %s",
1636 job->node->name, strerror(errno));
1638 W_SETEXITSTATUS(&status, 1);
1639 JobFinish(job, &status);
1643 * Job cannot be restarted. Mark the table as full and
1644 * place the job back on the list of stopped jobs.
1646 DEBUGF(JOB, ("table full\n"));
1647 TAILQ_INSERT_HEAD(&stoppedJobs, job, link);
1649 DEBUGF(JOB, ("Job queue is full.\n"));
1656 * Start a target-creation process going for the target described
1657 * by the graph node gn.
1660 * JOB_ERROR if there was an error in the commands, JOB_FINISHED
1661 * if there isn't actually anything left to do for the job and
1662 * JOB_RUNNING if the job has been started.
1665 * A new Job node is created and added to the list of running
1666 * jobs. PMake is forked and a child shell created.
1669 JobStart(GNode *gn, int flags, Job *previous)
1671 Job *job; /* new job descriptor */
1672 char *argv[4]; /* Argument vector to shell */
1673 Boolean cmdsOK; /* true if the nodes commands were all right */
1674 Boolean noExec; /* Set true if we decide not to run the job */
1675 int tfd; /* File descriptor for temp file */
1677 char tfile[sizeof(TMPPAT)];
1680 JobPassSig(interrupted);
1683 if (previous == NULL) {
1684 job = emalloc(sizeof(Job));
1687 previous->flags &= ~(JOB_FIRST | JOB_IGNERR | JOB_SILENT);
1691 job->shell = commandShell;
1693 job->tailCmds = NULL;
1696 * Set the initial value of the flags for this job based on the global
1697 * ones and the node's attributes... Any flags supplied by the caller
1698 * are also added to the field.
1701 if (Targ_Ignore(gn)) {
1702 job->flags |= JOB_IGNERR;
1704 if (Targ_Silent(gn)) {
1705 job->flags |= JOB_SILENT;
1707 job->flags |= flags;
1710 * Check the commands now so any attributes from .DEFAULT have a chance
1711 * to migrate to the node.
1713 if (!compatMake && (job->flags & JOB_FIRST)) {
1714 cmdsOK = Job_CheckCommands(gn, Error);
1720 * If the -n flag wasn't given, we open up OUR (not the child's)
1721 * temporary file to stuff commands in it. The thing is rd/wr so we
1722 * don't need to reopen it to feed it to the shell. If the -n flag
1723 * *was* given, we just set the file to be stdout. Cute, huh?
1725 if ((gn->type & OP_MAKE) || (!noExecute && !touchFlag)) {
1727 * We're serious here, but if the commands were bogus, we're
1734 strcpy(tfile, TMPPAT);
1735 if ((tfd = mkstemp(tfile)) == -1)
1736 Punt("Cannot create temp file: %s", strerror(errno));
1737 job->cmdFILE = fdopen(tfd, "w+");
1739 if (job->cmdFILE == NULL) {
1741 Punt("Could not open %s", tfile);
1743 fcntl(FILENO(job->cmdFILE), F_SETFD, 1);
1745 * Send the commands to the command file, flush all its
1746 * buffers then rewind and remove the thing.
1751 * Used to be backwards; replace when start doing multiple
1752 * commands per shell.
1756 * Be compatible: If this is the first time for this
1757 * node, verify its commands are ok and open the
1758 * commands list for sequential access by later
1759 * invocations of JobStart. Once that is done, we take
1760 * the next command off the list and print it to the
1761 * command file. If the command was an ellipsis, note
1762 * that there's nothing more to execute.
1764 if (job->flags & JOB_FIRST)
1765 gn->compat_command = Lst_First(&gn->commands);
1767 gn->compat_command =
1768 Lst_Succ(gn->compat_command);
1770 if (gn->compat_command == NULL ||
1771 JobPrintCommand(Lst_Datum(gn->compat_command), job))
1774 if (noExec && !(job->flags & JOB_FIRST)) {
1776 * If we're not going to execute anything, the
1777 * job is done and we need to close down the
1778 * various file descriptors we've opened for
1779 * output, then call JobDoOutput to catch the
1780 * final characters or send the file to the
1781 * screen... Note that the i/o streams are only
1782 * open if this isn't the first job. Note also
1783 * that this could not be done in
1784 * Job_CatchChildren b/c it wasn't clear if
1785 * there were more commands to execute or not...
1791 * We can do all the commands at once. hooray for sanity
1794 LST_FOREACH(ln, &gn->commands) {
1795 if (JobPrintCommand(Lst_Datum(ln), job))
1800 * If we didn't print out any commands to the shell
1801 * script, there's not much point in executing the
1804 if (numCommands == 0) {
1809 } else if (noExecute) {
1811 * Not executing anything -- just print all the commands to
1812 * stdout in one fell swoop. This will still set up
1813 * job->tailCmds correctly.
1815 if (lastNode != gn) {
1816 MESSAGE(stdout, gn);
1819 job->cmdFILE = stdout;
1822 * Only print the commands if they're ok, but don't die if
1823 * they're not -- just let the user know they're bad and keep
1824 * going. It doesn't do any harm in this case and may do
1828 LST_FOREACH(ln, &gn->commands) {
1829 if (JobPrintCommand(Lst_Datum(ln), job))
1834 * Don't execute the shell, thank you.
1840 * Just touch the target and note that no shell should be
1841 * executed. Set cmdFILE to stdout to make life easier. Check
1842 * the commands, too, but don't die if they're no good -- it
1843 * does no harm to keep working up the graph.
1845 job->cmdFILE = stdout;
1846 Job_Touch(gn, job->flags & JOB_SILENT);
1851 * If we're not supposed to execute a shell, don't.
1855 * Unlink and close the command file if we opened one
1857 if (job->cmdFILE != stdout) {
1858 if (job->cmdFILE != NULL)
1859 fclose(job->cmdFILE);
1865 * We only want to work our way up the graph if we aren't here
1866 * because the commands for the job were no good.
1869 if (aborting == 0) {
1870 for (ln = job->tailCmds; ln != NULL;
1871 ln = LST_NEXT(ln)) {
1872 Lst_AtEnd(&postCommands->commands,
1873 Buf_Peel(Var_Subst(Lst_Datum(ln),
1874 job->node, FALSE)));
1876 job->node->made = MADE;
1877 Make_Update(job->node);
1880 return(JOB_FINISHED);
1886 fflush(job->cmdFILE);
1890 * Set up the control arguments to the shell. This is based on the flags
1891 * set earlier for this job.
1893 JobMakeArgv(job, argv);
1896 * If we're using pipes to catch output, create the pipe by which we'll
1897 * get the shell's output. If we're using files, print out that we're
1898 * starting a job and then set up its temporary-file name.
1900 if (!compatMake || (job->flags & JOB_FIRST)) {
1905 Punt("Cannot create pipe: %s", strerror(errno));
1906 job->inPipe = fd[0];
1907 job->outPipe = fd[1];
1908 fcntl(job->inPipe, F_SETFD, 1);
1909 fcntl(job->outPipe, F_SETFD, 1);
1911 fprintf(stdout, "Remaking `%s'\n", gn->name);
1913 strcpy(job->outFile, TMPPAT);
1914 if ((job->outFd = mkstemp(job->outFile)) == -1)
1915 Punt("cannot create temp file: %s",
1917 fcntl(job->outFd, F_SETFD, 1);
1921 if (nJobs >= maxJobs && !(job->flags & JOB_SPECIAL) && maxJobs != 0) {
1923 * We've hit the limit of concurrency, so put the job on hold
1924 * until some other job finishes. Note that the special jobs
1925 * (.BEGIN, .INTERRUPT and .END) may be run even when the
1926 * limit has been reached (e.g. when maxJobs == 0).
1930 DEBUGF(JOB, ("Can only run job locally.\n"));
1931 job->flags |= JOB_RESTART;
1932 TAILQ_INSERT_TAIL(&stoppedJobs, job, link);
1934 if (nJobs >= maxJobs) {
1936 * If we're running this job as a special case
1937 * (see above), at least say the table is full.
1940 DEBUGF(JOB, ("Local job queue is full.\n"));
1944 return (JOB_RUNNING);
1948 JobOutput(Job *job, char *cp, char *endp, int msg)
1950 struct Shell *shell = job->shell;
1953 if (shell->noPrint) {
1954 ecp = strstr(cp, shell->noPrint);
1955 while (ecp != NULL) {
1958 if (msg && job->node != lastNode) {
1959 MESSAGE(stdout, job->node);
1960 lastNode = job->node;
1963 * The only way there wouldn't be a newline
1964 * after this line is if it were the last in
1965 * the buffer. However, since the non-printable
1966 * comes after it, there must be a newline, so
1967 * we don't print one.
1969 fprintf(stdout, "%s", cp);
1972 cp = ecp + strlen(shell->noPrint);
1975 * Still more to print, look again after
1976 * skipping the whitespace following the
1977 * non-printable command....
1980 while (*cp == ' ' || *cp == '\t' ||
1984 ecp = strstr(cp, shell->noPrint);
1995 * This function is called at different times depending on
1996 * whether the user has specified that output is to be collected
1997 * via pipes or temporary files. In the former case, we are called
1998 * whenever there is something to read on the pipe. We collect more
1999 * output from the given job and store it in the job's outBuf. If
2000 * this makes up a line, we print it tagged by the job's identifier,
2002 * If output has been collected in a temporary file, we open the
2003 * file and read it line by line, transfering it to our own
2004 * output channel until the file is empty. At which point we
2005 * remove the temporary file.
2006 * In both cases, however, we keep our figurative eye out for the
2007 * 'noPrint' line for the shell from which the output came. If
2008 * we recognize a line, we don't print it. If the command is not
2009 * alone on the line (the character after it is not \0 or \n), we
2010 * do print whatever follows it.
2013 * curPos may be shifted as may the contents of outBuf.
2016 JobDoOutput(Job *job, Boolean finish)
2018 Boolean gotNL = FALSE; /* true if got a newline */
2019 Boolean fbuf; /* true if our buffer filled up */
2020 int nr; /* number of bytes read */
2021 int i; /* auxiliary index into outBuf */
2022 int max; /* limit for i (end of current data) */
2023 int nRead; /* (Temporary) number of bytes read */
2024 FILE *oFILE; /* Stream pointer to shell's output file */
2029 * Read as many bytes as will fit in the buffer.
2035 nRead = read(job->inPipe, &job->outBuf[job->curPos],
2036 JOB_BUFSIZE - job->curPos);
2038 * Check for interrupt here too, because the above read may
2039 * block when the child process is stopped. In this case the
2040 * interrupt will unblock it (we don't use SA_RESTART).
2043 JobPassSig(interrupted);
2046 DEBUGF(JOB, ("JobDoOutput(piperead)"));
2053 * If we hit the end-of-file (the job is dead), we must flush
2054 * its remaining output, so pretend we read a newline if
2055 * there's any output remaining in the buffer.
2056 * Also clear the 'finish' flag so we stop looping.
2058 if (nr == 0 && job->curPos != 0) {
2059 job->outBuf[job->curPos] = '\n';
2062 } else if (nr == 0) {
2067 * Look for the last newline in the bytes we just got. If there
2068 * is one, break out of the loop with 'i' as its index and
2071 max = job->curPos + nr;
2072 for (i = job->curPos + nr - 1; i >= job->curPos; i--) {
2073 if (job->outBuf[i] == '\n') {
2076 } else if (job->outBuf[i] == '\0') {
2080 job->outBuf[i] = ' ';
2086 if (job->curPos == JOB_BUFSIZE) {
2088 * If we've run out of buffer space, we have
2089 * no choice but to print the stuff. sigh.
2095 if (gotNL || fbuf) {
2097 * Need to send the output to the screen. Null terminate
2098 * it first, overwriting the newline character if there
2099 * was one. So long as the line isn't one we should
2100 * filter (according to the shell description), we print
2101 * the line, preceded by a target banner if this target
2102 * isn't the same as the one for which we last printed
2103 * something. The rest of the data in the buffer are
2104 * then shifted down to the start of the buffer and
2105 * curPos is set accordingly.
2107 job->outBuf[i] = '\0';
2108 if (i >= job->curPos) {
2111 cp = JobOutput(job, job->outBuf,
2112 &job->outBuf[i], FALSE);
2115 * There's still more in that buffer. This time,
2116 * though, we know there's no newline at the
2117 * end, so we add one of our own free will.
2120 if (job->node != lastNode) {
2121 MESSAGE(stdout, job->node);
2122 lastNode = job->node;
2124 fprintf(stdout, "%s%s", cp,
2130 /* shift the remaining characters down */
2131 memcpy(job->outBuf, &job->outBuf[i + 1],
2133 job->curPos = max - (i + 1);
2137 * We have written everything out, so we just
2138 * start over from the start of the buffer.
2139 * No copying. No nothing.
2146 * If the finish flag is true, we must loop until we hit
2147 * end-of-file on the pipe. This is guaranteed to happen
2148 * eventually since the other end of the pipe is now
2149 * closed (we closed it explicitly and the child has
2150 * exited). When we do get an EOF, finish will be set
2151 * FALSE and we'll fall through and out.
2158 * We've been called to retrieve the output of the job from the
2159 * temporary file where it's been squirreled away. This consists
2160 * of opening the file, reading the output line by line, being
2161 * sure not to print the noPrint line for the shell we used,
2162 * then close and remove the temporary file. Very simple.
2164 * Change to read in blocks and do FindSubString type things
2165 * as for pipes? That would allow for "@echo -n..."
2167 oFILE = fopen(job->outFile, "r");
2168 if (oFILE != NULL) {
2169 fprintf(stdout, "Results of making %s:\n",
2173 while (fgets(inLine, sizeof(inLine), oFILE) != NULL) {
2174 char *cp, *endp, *oendp;
2177 oendp = endp = inLine + strlen(inLine);
2178 if (endp[-1] == '\n') {
2181 cp = JobOutput(job, inLine, endp, FALSE);
2184 * There's still more in that buffer. This time,
2185 * though, we know there's no newline at the
2186 * end, so we add one of our own free will.
2188 fprintf(stdout, "%s", cp);
2190 if (endp != oendp) {
2191 fprintf(stdout, "\n");
2196 eunlink(job->outFile);
2203 * Handle the exit of a child. Called from Make_Make.
2206 * The job descriptor is removed from the list of children.
2209 * We do waits, blocking or not, according to the wisdom of our
2210 * caller, until there are no more children to report. For each
2211 * job, call JobFinish to finish things off. This will take care of
2212 * putting jobs on the stoppedJobs queue.
2215 Job_CatchChildren(Boolean block)
2217 pid_t pid; /* pid of dead child */
2218 Job *job; /* job descriptor for dead child */
2219 int status; /* Exit/termination status */
2222 * Don't even bother if we know there's no one around.
2229 pid = waitpid((pid_t)-1, &status,
2230 (block ? 0 : WNOHANG) | WUNTRACED);
2234 DEBUGF(JOB, ("Process %jd exited or stopped.\n",
2237 TAILQ_FOREACH(job, &jobs, link) {
2238 if (job->pid == pid)
2243 if (WIFSIGNALED(status) &&
2244 (WTERMSIG(status) == SIGCONT)) {
2245 TAILQ_FOREACH(job, &jobs, link) {
2246 if (job->pid == pid)
2250 Error("Resumed child (%jd) "
2251 "not in table", (intmax_t)pid);
2254 TAILQ_REMOVE(&stoppedJobs, job, link);
2256 Error("Child (%jd) not in table?",
2261 TAILQ_REMOVE(&jobs, job, link);
2263 if (fifoFd >= 0 && maxJobs > 1) {
2264 write(fifoFd, "+", 1);
2266 if (nJobs >= maxJobs)
2271 DEBUGF(JOB, ("Job queue is no longer full.\n"));
2276 JobFinish(job, &status);
2279 JobPassSig(interrupted);
2284 * Catch the output from our children, if we're using
2285 * pipes do so. Otherwise just block time until we get a
2286 * signal(most likely a SIGCHLD) since there's no point in
2287 * just spinning when there's nothing to do and the reaping
2288 * of a child can wait for a while.
2291 * Output is read from pipes if we're piping.
2295 Job_CatchOutput(int flag __unused)
2297 Job_CatchOutput(int flag)
2303 struct kevent kev[KEV_SIZE];
2306 struct timeval timeout;
2315 if ((nfds = kevent(kqfd, NULL, 0, kev, KEV_SIZE, NULL)) == -1) {
2317 Punt("kevent: %s", strerror(errno));
2319 JobPassSig(interrupted);
2321 for (i = 0; i < nfds; i++) {
2322 if (kev[i].flags & EV_ERROR) {
2323 warnc(kev[i].data, "kevent");
2326 switch (kev[i].filter) {
2328 JobDoOutput(kev[i].udata, FALSE);
2332 * Just wake up and let
2333 * Job_CatchChildren() collect the
2342 timeout.tv_sec = SEL_SEC;
2343 timeout.tv_usec = SEL_USEC;
2344 if (flag && jobFull && fifoFd >= 0)
2345 FD_SET(fifoFd, &readfds);
2347 nfds = select(FD_SETSIZE, &readfds, (fd_set *)NULL,
2348 (fd_set *)NULL, &timeout);
2351 JobPassSig(interrupted);
2354 if (fifoFd >= 0 && FD_ISSET(fifoFd, &readfds)) {
2358 job = TAILQ_FIRST(&jobs);
2359 while (nfds != 0 && job != NULL) {
2360 if (FD_ISSET(job->inPipe, &readfds)) {
2361 JobDoOutput(job, FALSE);
2364 job = TAILQ_NEXT(job, link);
2366 #endif /* !USE_KQUEUE */
2372 * Start the creation of a target. Basically a front-end for
2373 * JobStart used by the Make module.
2376 * Another job is started.
2382 JobStart(gn, 0, NULL);
2387 * Initialize the process module, given a maximum number of jobs.
2390 * lists and counters are initialized
2393 Job_Init(int maxproc)
2395 GNode *begin; /* node for commands to do at the very start */
2399 env = getenv("MAKE_JOBS_FIFO");
2401 if (env == NULL && maxproc > 1) {
2403 * We did not find the environment variable so we are the
2404 * leader. Create the fifo, open it, write one char per
2405 * allowed job into the pipe.
2407 fifoFd = mkfifotemp(fifoName);
2412 fcntl(fifoFd, F_SETFL, O_NONBLOCK);
2414 setenv("MAKE_JOBS_FIFO", env, 1);
2415 while (maxproc-- > 0) {
2416 write(fifoFd, "+", 1);
2418 /* The master make does not get a magic token */
2423 } else if (env != NULL) {
2425 * We had the environment variable so we are a slave.
2426 * Open fifo and give ourselves a magic token which represents
2427 * the token our parent make has grabbed to start his make
2428 * process. Otherwise the sub-makes would gobble up tokens and
2429 * the proper number of tokens to specify to -j would depend
2430 * on the depth of the tree and the order of execution.
2432 fifoFd = open(env, O_RDWR, 0);
2434 fcntl(fifoFd, F_SETFL, O_NONBLOCK);
2451 if ((maxJobs == 1 && fifoFd < 0) || beVerbose == 0) {
2453 * If only one job can run at a time, there's no need for a
2454 * banner, no is there?
2461 Proc_Setupsignals(FALSE);
2464 if ((kqfd = kqueue()) == -1) {
2465 Punt("kqueue: %s", strerror(errno));
2469 begin = Targ_FindNode(".BEGIN", TARG_NOCREATE);
2471 if (begin != NULL) {
2472 JobStart(begin, JOB_SPECIAL, (Job *)NULL);
2475 Job_CatchChildren(!usePipes);
2478 postCommands = Targ_FindNode(".END", TARG_CREATE);
2483 * See if the job table is full. It is considered full if it is OR
2484 * if we are in the process of aborting OR if we have
2485 * reached/exceeded our local quota. This prevents any more jobs
2489 * TRUE if the job table is full, FALSE otherwise
2499 if (fifoFd >= 0 && jobFull) {
2500 i = read(fifoFd, &c, 1);
2511 * See if the job table is empty. Because the local concurrency may
2512 * be set to 0, it is possible for the job table to become empty,
2513 * while the list of stoppedJobs remains non-empty. In such a case,
2514 * we want to restart as many jobs as we can.
2517 * TRUE if it is. FALSE if it ain't.
2524 if (!TAILQ_EMPTY(&stoppedJobs) && !aborting) {
2526 * The job table is obviously not full if it has no
2527 * jobs in it...Try and restart the stopped jobs.
2542 * Handle the receipt of an interrupt.
2545 * All children are killed. Another job will be started if the
2546 * .INTERRUPT target was given.
2549 JobInterrupt(int runINTERRUPT, int signo)
2551 Job *job; /* job descriptor in that element */
2552 GNode *interrupt; /* the node describing the .INTERRUPT target */
2554 aborting = ABORT_INTERRUPT;
2556 TAILQ_FOREACH(job, &jobs, link) {
2557 if (!Targ_Precious(job->node)) {
2558 char *file = (job->node->path == NULL ?
2559 job->node->name : job->node->path);
2561 if (!noExecute && eunlink(file) != -1) {
2562 Error("*** %s removed", file);
2566 DEBUGF(JOB, ("JobInterrupt passing signal to child "
2567 "%jd.\n", (intmax_t)job->pid));
2568 KILL(job->pid, signo);
2572 if (runINTERRUPT && !touchFlag) {
2574 * clear the interrupted flag because we would get an
2575 * infinite loop otherwise.
2579 interrupt = Targ_FindNode(".INTERRUPT", TARG_NOCREATE);
2580 if (interrupt != NULL) {
2581 ignoreErrors = FALSE;
2583 JobStart(interrupt, JOB_IGNDOTS, (Job *)NULL);
2586 Job_CatchChildren(!usePipes);
2594 * Do final processing such as the running of the commands
2595 * attached to the .END target.
2598 * Number of errors reported.
2604 if (postCommands != NULL && !Lst_IsEmpty(&postCommands->commands)) {
2606 Error("Errors reported so .END ignored");
2608 JobStart(postCommands, JOB_SPECIAL | JOB_IGNDOTS, NULL);
2612 Job_CatchChildren(!usePipes);
2627 * Waits for all running jobs to finish and returns. Sets 'aborting'
2628 * to ABORT_WAIT to prevent other jobs from starting.
2631 * Currently running jobs finish.
2637 aborting = ABORT_WAIT;
2638 while (nJobs != 0) {
2640 Job_CatchChildren(!usePipes);
2647 * Abort all currently running jobs without handling output or anything.
2648 * This function is to be called only in the event of a major
2649 * error. Most definitely NOT to be called from JobInterrupt.
2652 * All children are killed, not just the firstborn
2657 Job *job; /* the job descriptor in that element */
2660 aborting = ABORT_ERROR;
2663 TAILQ_FOREACH(job, &jobs, link) {
2665 * kill the child process with increasingly drastic
2666 * signals to make darn sure it's dead.
2668 KILL(job->pid, SIGINT);
2669 KILL(job->pid, SIGKILL);
2674 * Catch as many children as want to report in at first, then give up
2676 while (waitpid((pid_t)-1, &status, WNOHANG) > 0)
2682 * Tries to restart stopped jobs if there are slots available.
2683 * Note that this tries to restart them regardless of pending errors.
2684 * It's not good to leave stopped jobs lying around!
2687 * Resumes(and possibly migrates) jobs.
2690 JobRestartJobs(void)
2694 while (!jobFull && (job = TAILQ_FIRST(&stoppedJobs)) != NULL) {
2695 DEBUGF(JOB, ("Job queue is not full. "
2696 "Restarting a stopped job.\n"));
2697 TAILQ_REMOVE(&stoppedJobs, job, link);
2704 * Execute the command in cmd, and return the output of that command
2708 * A string containing the output of the command, or the empty string
2709 * If error is not NULL, it contains the reason for the command failure
2710 * Any output sent to stderr in the child process is passed to stderr,
2711 * and not captured in the string.
2714 * The string must be freed by the caller.
2717 Cmd_Exec(const char *cmd, const char **error)
2719 struct Shell *shell = commandShell;
2720 int fds[2]; /* Pipe streams */
2721 int status; /* command exit status */
2722 Buffer *buf; /* buffer to store the result */
2730 * Open a pipe for fetching its output
2732 if (pipe(fds) == -1) {
2733 *error = "Couldn't create pipe for \"%s\"";
2737 /* Set close-on-exec on read side of pipe. */
2738 fcntl(fds[0], F_SETFD, fcntl(fds[0], F_GETFD) | FD_CLOEXEC);
2740 ps.in = STDIN_FILENO;
2742 ps.err = STDERR_FILENO;
2744 ps.merge_errors = 0;
2748 /* Set up arguments for shell */
2749 ps.argv = emalloc(4 * sizeof(char *));
2750 ps.argv[0] = strdup(shell->name);
2751 ps.argv[1] = strdup("-c");
2752 ps.argv[2] = strdup(cmd);
2757 * Fork. Warning since we are doing vfork() instead of fork(),
2758 * do not allocate memory in the child process!
2760 if ((ps.child_pid = vfork()) == -1) {
2761 *error = "Couldn't exec \"%s\"";
2763 } else if (ps.child_pid == 0) {
2767 Proc_Exec(&ps, shell);
2776 close(fds[1]); /* No need for the writing half of the pipe. */
2779 char result[BUFSIZ];
2781 rcnt = read(fds[0], result, sizeof(result));
2783 Buf_AddBytes(buf, (size_t)rcnt, (Byte *)result);
2784 } while (rcnt > 0 || (rcnt == -1 && errno == EINTR));
2787 *error = "Error reading shell's output for \"%s\"";
2790 * Close the input side of the pipe.
2794 status = ProcWait(&ps);
2796 *error = "\"%s\" returned non-zero status";
2798 Buf_StripNewlines(buf);
2806 * Interrupt the creation of the current target and remove it if
2807 * it ain't precious.
2813 * The target is removed and the process exits. If .INTERRUPT exists,
2814 * its commands are run first WITH INTERRUPTS IGNORED..
2817 CompatInterrupt(int signo, GNode *ENDNode)
2820 sigset_t nmask, omask;
2823 sigemptyset(&nmask);
2824 sigaddset(&nmask, SIGINT);
2825 sigaddset(&nmask, SIGTERM);
2826 sigaddset(&nmask, SIGHUP);
2827 sigaddset(&nmask, SIGQUIT);
2828 sigprocmask(SIG_SETMASK, &nmask, &omask);
2830 /* prevent recursion in evaluation of .INTERRUPT */
2833 if (curTarg != NULL && !Targ_Precious(curTarg)) {
2834 const char *file = Var_Value(TARGET, curTarg);
2836 if (!noExecute && eunlink(file) != -1) {
2837 printf("*** %s removed\n", file);
2842 * Run .INTERRUPT only if hit with interrupt signal
2844 if (signo == SIGINT) {
2845 gn = Targ_FindNode(".INTERRUPT", TARG_NOCREATE);
2847 LST_FOREACH(ln, &gn->commands) {
2848 if (Compat_RunCommand(Lst_Datum(ln), gn, ENDNode))
2854 sigprocmask(SIG_SETMASK, &omask, NULL);
2856 if (signo == SIGQUIT)
2858 signal(signo, SIG_DFL);
2859 kill(getpid(), signo);
2863 * Execute the next command for a target. If the command returns an
2864 * error, the node's made field is set to ERROR and creation stops.
2865 * The node from which the command came is also given. This is used
2866 * to execute the commands in compat mode and when executing commands
2867 * with the '+' flag in non-compat mode. In these modes each command
2868 * line should be executed by its own shell. We do some optimisation here:
2869 * if the shell description defines both a string of meta characters and
2870 * a list of builtins and the command line neither contains a meta character
2871 * nor starts with one of the builtins then we execute the command directly
2872 * without invoking a shell.
2875 * 0 if the command succeeded, 1 if an error occurred.
2878 * The node's 'made' field may be set to ERROR.
2881 Compat_RunCommand(char *cmd, GNode *gn, GNode *ENDNode)
2883 struct Shell *shell = commandShell;
2885 char *cmdStart; /* Start of expanded command */
2886 Boolean silent; /* Don't print command */
2887 Boolean doit; /* Execute even in -n */
2888 Boolean errCheck; /* Check errors */
2889 int reason; /* Reason for child's death */
2890 int status; /* Description of child's death */
2891 LstNode *cmdNode; /* Node where current cmd is located */
2892 char **av; /* Argument vector for thing to exec */
2895 silent = gn->type & OP_SILENT;
2896 errCheck = !(gn->type & OP_IGNORE);
2899 cmdNode = Lst_Member(&gn->commands, cmd);
2900 cmdStart = Buf_Peel(Var_Subst(cmd, gn, FALSE));
2902 if (*cmdStart == '\0') {
2904 Error("%s expands to empty string", cmd);
2909 Lst_Replace(cmdNode, cmdStart);
2911 if ((gn->type & OP_SAVE_CMDS) && (gn != ENDNode)) {
2912 Lst_AtEnd(&ENDNode->commands, cmdStart);
2914 } else if (strcmp(cmdStart, "...") == 0) {
2915 gn->type |= OP_SAVE_CMDS;
2919 while (*cmd == '@' || *cmd == '-' || *cmd == '+') {
2923 silent = DEBUG(LOUD) ? FALSE : TRUE;
2937 while (isspace((unsigned char)*cmd))
2941 * Print the command before echoing if we're not supposed to be quiet
2942 * for this one. We also print the command if -n given, but not if '+'.
2944 if (!silent || (noExecute && !doit)) {
2945 printf("%s\n", cmd);
2950 * If we're not supposed to execute any commands, this is as far as
2953 if (!doit && noExecute) {
2957 if (shell->meta != NULL &&
2958 strpbrk(cmd, shell->meta) != NULL) {
2960 * We found a "meta" character and need to pass the command
2967 char **sh_builtin = shell->builtins.argv + 1;
2970 * Break the command into words to form an argument
2971 * vector we can execute.
2973 brk_string(&aa, cmd, TRUE);
2976 for (p = sh_builtin; *p != 0; p++) {
2977 if (strcmp(av[0], *p) == 0) {
2979 * This command must be passed by the shell
2980 * for other reasons.. or.. possibly not at
2989 ps.in = STDIN_FILENO;
2990 ps.out = STDOUT_FILENO;
2991 ps.err = STDERR_FILENO;
2993 ps.merge_errors = 0;
2999 * We give the shell the -e flag as well as -c if it's
3000 * supposed to exit when it hits an error.
3002 ps.argv = emalloc(4 * sizeof(char *));
3003 ps.argv[0] = strdup(shell->path);
3004 ps.argv[1] = strdup(errCheck ? "-ec" : "-c");
3005 ps.argv[2] = strdup(cmd);
3012 ps.errCheck = errCheck;
3015 * Fork and execute the single command. If the fork fails, we abort.
3016 * Warning since we are doing vfork() instead of fork(),
3017 * do not allocate memory in the child process!
3019 if ((ps.child_pid = vfork()) == -1) {
3020 Fatal("Could not fork");
3022 } else if (ps.child_pid == 0) {
3026 Proc_Exec(&ps, shell);
3040 * we need to print out the command associated with this
3041 * Gnode in Targ_PrintCmd from Targ_PrintGraph when debugging
3042 * at level g2, in main(), Fatal() and DieHorribly(),
3043 * therefore do not free it when debugging.
3045 if (!DEBUG(GRAPH2)) {
3050 * The child is off and running. Now all we can do is wait...
3052 reason = ProcWait(&ps);
3055 CompatInterrupt(interrupted, ENDNode);
3058 * Decode and report the reason child exited, then
3059 * indicate how we handled it.
3061 if (WIFEXITED(reason)) {
3062 status = WEXITSTATUS(reason);
3066 printf("*** Error code %d", status);
3068 } else if (WIFSTOPPED(reason)) {
3069 status = WSTOPSIG(reason);
3071 status = WTERMSIG(reason);
3072 printf("*** Signal %d", status);
3083 printf(" (continuing)\n");
3088 * Continue executing
3089 * commands for this target.
3090 * If we return 0, this will
3093 printf(" (ignored)\n");
3101 * Make a target, given the parent, to abort if necessary.
3104 * If an error is detected and not being ignored, the process exits.
3107 CompatMake(GNode *gn, GNode *pgn, GNode *ENDNode, Boolean queryFlag)
3111 if (gn->type & OP_USE) {
3112 Make_HandleUse(gn, pgn);
3114 } else if (gn->made == UNMADE) {
3116 * First mark ourselves to be made, then apply whatever
3117 * transformations the suffix module thinks are necessary.
3118 * Once that's done, we can descend and make all our children.
3119 * If any of them has an error but the -k flag was given, our
3120 * 'make' field will be set FALSE again. This is our signal to
3121 * not attempt to do anything but abort our parent as well.
3124 gn->made = BEINGMADE;
3126 LST_FOREACH(ln, &gn->children)
3127 CompatMake(Lst_Datum(ln), gn, ENDNode, queryFlag);
3134 if (Lst_Member(&gn->iParents, pgn) != NULL) {
3135 Var_Set(IMPSRC, Var_Value(TARGET, gn), pgn);
3139 * All the children were made ok. Now cmtime contains the
3140 * modification time of the newest child, we need to find out
3141 * if we exist and when we were modified last. The criteria for
3142 * datedness are defined by the Make_OODate function.
3144 DEBUGF(MAKE, ("Examining %s...", gn->name));
3145 if (!Make_OODate(gn)) {
3146 gn->made = UPTODATE;
3147 DEBUGF(MAKE, ("up-to-date.\n"));
3150 DEBUGF(MAKE, ("out-of-date.\n"));
3154 * If the user is just seeing if something is out-of-date,
3155 * exit now to tell him/her "yes".
3162 * We need to be re-made. We also have to make sure we've got
3163 * a $? variable. To be nice, we also define the $> variable
3164 * using Make_DoAllVar().
3169 * Alter our type to tell if errors should be ignored or things
3170 * should not be printed so Compat_RunCommand knows what to do.
3172 if (Targ_Ignore(gn)) {
3173 gn->type |= OP_IGNORE;
3175 if (Targ_Silent(gn)) {
3176 gn->type |= OP_SILENT;
3179 if (Job_CheckCommands(gn, Fatal)) {
3181 * Our commands are ok, but we still have to worry
3182 * about the -t flag...
3186 LST_FOREACH(ln, &gn->commands) {
3187 if (Compat_RunCommand(Lst_Datum(ln), gn, ENDNode))
3192 Job_Touch(gn, gn->type & OP_SILENT);
3198 if (gn->made != ERROR) {
3200 * If the node was made successfully, mark it so, update
3201 * its modification time and timestamp all its parents.
3202 * Note that for .ZEROTIME targets, the timestamping
3203 * isn't done. This is to keep its state from affecting
3204 * that of its parent.
3209 * We can't re-stat the thing, but we can at least take
3210 * care of rules where a target depends on a source that
3211 * actually creates the target, but only if it has
3219 * mv y.tab.o parse.o
3220 * cmp -s y.tab.h parse.h || mv y.tab.h parse.h
3222 * In this case, if the definitions produced by yacc
3223 * haven't changed from before, parse.h won't have been
3224 * updated and gn->mtime will reflect the current
3225 * modification time for parse.h. This is something of a
3226 * kludge, I admit, but it's a useful one..
3228 * XXX: People like to use a rule like
3232 * To force things that depend on FRC to be made, so we
3233 * have to check for gn->children being empty as well...
3235 if (!Lst_IsEmpty(&gn->commands) ||
3236 Lst_IsEmpty(&gn->children)) {
3241 * This is what Make does and it's actually a good
3242 * thing, as it allows rules like
3244 * cmp -s y.tab.h parse.h || cp y.tab.h parse.h
3246 * to function as intended. Unfortunately, thanks to
3247 * the stateless nature of NFS (and the speed of this
3248 * program), there are times when the modification time
3249 * of a file created on a remote machine will not be
3250 * modified before the stat() implied by the Dir_MTime
3251 * occurs, thus leading us to believe that the file
3252 * is unchanged, wreaking havoc with files that depend
3255 * I have decided it is better to make too much than to
3256 * make too little, so this stuff is commented out
3257 * unless you're sure it's ok.
3260 if (noExecute || Dir_MTime(gn) == 0) {
3263 if (gn->cmtime > gn->mtime)
3264 gn->mtime = gn->cmtime;
3265 DEBUGF(MAKE, ("update time: %s\n",
3266 Targ_FmtTime(gn->mtime)));
3268 if (!(gn->type & OP_EXEC)) {
3269 pgn->childMade = TRUE;
3270 Make_TimeStamp(pgn, gn);
3273 } else if (keepgoing) {
3277 printf("\n\nStop in %s.\n", Var_Value(".CURDIR", gn));
3280 } else if (gn->made == ERROR) {
3282 * Already had an error when making this beastie. Tell the
3287 if (Lst_Member(&gn->iParents, pgn) != NULL) {
3288 Var_Set(IMPSRC, Var_Value(TARGET, gn), pgn);
3292 Error("Graph cycles through %s\n", gn->name);
3297 if ((gn->type & OP_EXEC) == 0) {
3298 pgn->childMade = TRUE;
3299 Make_TimeStamp(pgn, gn);
3303 if ((gn->type & OP_EXEC) == 0) {
3304 Make_TimeStamp(pgn, gn);
3316 * Start making given a list of target nodes. Returns what the exit
3317 * status of make should be.
3319 * @note Obviously some function we call is exiting since the code only
3320 * returns 0. We will fix that bug eventually.
3323 Compat_Run(Lst *targs, Boolean queryFlag)
3325 GNode *gn = NULL; /* Current root target */
3326 int error_cnt; /* Number of targets not remade due to errors */
3330 Proc_Setupsignals(TRUE);
3332 ENDNode = Targ_FindNode(".END", TARG_CREATE);
3334 * If the user has defined a .BEGIN target, execute the commands
3337 if (queryFlag == FALSE) {
3338 gn = Targ_FindNode(".BEGIN", TARG_NOCREATE);
3340 LST_FOREACH(ln, &gn->commands) {
3341 if (Compat_RunCommand(Lst_Datum(ln), gn, ENDNode))
3344 if (gn->made == ERROR) {
3345 printf("\n\nStop.\n");
3348 * (queryFlag && outOfDate) ? 1 : 0 ->
3349 * (FALSE && TRUE) ? 1 : 0 ->
3350 * 0 Successful completion?
3359 * For each entry in the list of targets to create, call CompatMake on
3360 * it to create the thing. CompatMake will leave the 'made' field of gn
3361 * in one of several states:
3362 * UPTODATE gn was already up-to-date
3363 * MADE gn was recreated successfully
3364 * ERROR An error occurred while gn was being created
3365 * ABORTED gn was not remade because one of its inferiors
3366 * could not be made due to errors.
3369 while (!Lst_IsEmpty(targs)) {
3370 gn = Lst_DeQueue(targs);
3371 CompatMake(gn, gn, ENDNode, queryFlag);
3373 if (gn->made == UPTODATE) {
3374 printf("`%s' is up to date.\n", gn->name);
3375 } else if (gn->made == ABORTED) {
3376 printf("`%s' not remade because of errors.\n",
3383 * If the user has defined a .END target, run its commands.
3385 if (error_cnt == 0) {
3386 LST_FOREACH(ln, &ENDNode->commands) {
3387 if (Compat_RunCommand(Lst_Datum(ln), gn, ENDNode))
3392 return (0); /* Successful completion */
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