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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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
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 1.116 2005/06/16 20:51:04 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
171 pid_t pid; /* The child's process ID */
173 struct GNode *node; /* The target the child is making */
176 * A LstNode for the first command to be saved after the job completes.
177 * This is NULL if there was no "..." in the job's commands.
182 * An FILE* for writing out the commands. This is only
183 * used before the job is actually started.
188 * A word of flags which determine how the module handles errors,
189 * echoing, etc. for the job
191 short flags; /* Flags to control treatment of job */
192 #define JOB_IGNERR 0x001 /* Ignore non-zero exits */
193 #define JOB_SILENT 0x002 /* no output */
194 #define JOB_SPECIAL 0x004 /* Target is a special one. i.e. run it locally
195 * if we can't export it and maxLocal is 0 */
196 #define JOB_IGNDOTS 0x008 /* Ignore "..." lines when processing
198 #define JOB_FIRST 0x020 /* Job is first job for the node */
199 #define JOB_RESTART 0x080 /* Job needs to be completely restarted */
200 #define JOB_RESUME 0x100 /* Job needs to be resumed b/c it stopped,
202 #define JOB_CONTINUING 0x200 /* We are in the process of resuming this job.
203 * Used to avoid infinite recursion between
204 * JobFinish and JobRestart */
206 /* union for handling shell's output */
209 * This part is used when usePipes is true.
210 * The output is being caught via a pipe and the descriptors
211 * of our pipe, an array in which output is line buffered and
212 * the current position in that buffer are all maintained for
217 * Input side of pipe associated with
218 * job's output channel
223 * Output side of pipe associated with job's
229 * Buffer for storing the output of the
232 char op_outBuf[JOB_BUFSIZE + 1];
234 /* Current position in op_outBuf */
239 * If usePipes is false the output is routed to a temporary
240 * file and all that is kept is the name of the file and the
241 * descriptor open to the file.
244 /* Name of file to which shell output was rerouted */
245 char of_outFile[sizeof(TMPPAT)];
248 * Stream open to the output file. Used to funnel all
249 * from a single job to one file while still allowing
250 * multiple shell invocations
255 } output; /* Data for tracking a shell's output */
257 TAILQ_ENTRY(Job) link; /* list link */
260 #define outPipe output.o_pipe.op_outPipe
261 #define inPipe output.o_pipe.op_inPipe
262 #define outBuf output.o_pipe.op_outBuf
263 #define curPos output.o_pipe.op_curPos
264 #define outFile output.o_file.of_outFile
265 #define outFd output.o_file.of_outFd
267 TAILQ_HEAD(JobList, Job);
270 * error handling variables
272 static int errors = 0; /* number of errors reported */
273 static int aborting = 0; /* why is the make aborting? */
274 #define ABORT_ERROR 1 /* Because of an error */
275 #define ABORT_INTERRUPT 2 /* Because it was interrupted */
276 #define ABORT_WAIT 3 /* Waiting for jobs to finish */
279 * XXX: Avoid SunOS bug... FILENO() is fp->_file, and file
280 * is a char! So when we go above 127 we turn negative!
282 #define FILENO(a) ((unsigned)fileno(a))
285 * post-make command processing. The node postCommands is really just the
286 * .END target but we keep it around to avoid having to search for it
289 static GNode *postCommands;
292 * The number of commands actually printed for a target. Should this
293 * number be 0, no shell will be executed.
295 static int numCommands;
298 * Return values from JobStart.
300 #define JOB_RUNNING 0 /* Job is running */
301 #define JOB_ERROR 1 /* Error in starting the job */
302 #define JOB_FINISHED 2 /* The job is already finished */
303 #define JOB_STOPPED 3 /* The job is stopped */
306 * The maximum number of jobs that may run. This is initialize from the
307 * -j argument for the leading make and from the FIFO for sub-makes.
310 static int nJobs; /* The number of children currently running */
312 /* The structures that describe them */
313 static struct JobList jobs = TAILQ_HEAD_INITIALIZER(jobs);
315 static Boolean jobFull; /* Flag to tell when the job table is full. It
316 * is set TRUE when (1) the total number of
317 * running jobs equals the maximum allowed */
319 static int kqfd; /* File descriptor obtained by kqueue() */
321 static fd_set outputs; /* Set of descriptors of pipes connected to
322 * the output channels of children */
325 static GNode *lastNode; /* The node for which output was most recently
327 static const char *targFmt; /* Format string to use to head output from a
328 * job when it's not the most-recent job heard
331 #define TARG_FMT "--- %s ---\n" /* Default format */
332 #define MESSAGE(fp, gn) \
333 fprintf(fp, targFmt, gn->name);
336 * When JobStart attempts to run a job but isn't allowed to
337 * or when Job_CatchChildren detects a job that has
338 * been stopped somehow, the job is placed on the stoppedJobs queue to be run
339 * when the next job finishes.
341 * Lst of Job structures describing jobs that were stopped due to
342 * concurrency limits or externally
344 static struct JobList stoppedJobs = TAILQ_HEAD_INITIALIZER(stoppedJobs);
346 static int fifoFd; /* Fd of our job fifo */
347 static char fifoName[] = "/tmp/make_fifo_XXXXXXXXX";
348 static int fifoMaster;
350 static sig_atomic_t interrupted;
353 #if defined(USE_PGRP) && defined(SYSV)
354 # define KILL(pid, sig) killpg(-(pid), (sig))
356 # if defined(USE_PGRP)
357 # define KILL(pid, sig) killpg((pid), (sig))
359 # define KILL(pid, sig) kill((pid), (sig))
364 * Grmpf... There is no way to set bits of the wait structure
365 * anymore with the stupid W*() macros. I liked the union wait
366 * stuff much more. So, we devise our own macros... This is
367 * really ugly, use dramamine sparingly. You have been warned.
369 #define W_SETMASKED(st, val, fun) \
372 int mask = fun(sh); \
374 for (sh = 0; ((mask >> sh) & 1) == 0; sh++) \
376 *(st) = (*(st) & ~mask) | ((val) << sh); \
379 #define W_SETTERMSIG(st, val) W_SETMASKED(st, val, WTERMSIG)
380 #define W_SETEXITSTATUS(st, val) W_SETMASKED(st, val, WEXITSTATUS)
382 static void JobRestart(Job *);
383 static int JobStart(GNode *, int, Job *);
384 static void JobDoOutput(Job *, Boolean);
385 static void JobInterrupt(int, int);
386 static void JobRestartJobs(void);
387 static int Compat_RunCommand(char *, GNode *, GNode *);
389 static GNode *curTarg = NULL;
392 * Create a fifo file with a uniq filename, and returns a file
393 * descriptor to that fifo.
396 mkfifotemp(char *template)
401 const char padchar[] =
402 "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
404 if (template[0] == '\0') {
405 errno = EINVAL; /* bad input string */
409 /* Find end of template string. */
410 pathend = strchr(template, '\0');
414 * Starting from the end of the template replace spaces with 'X' in
415 * them with random characters until there are no more 'X'.
417 while (ptr >= template && *ptr == 'X') {
418 uint32_t rand_num = arc4random() % (sizeof(padchar) - 1);
419 *ptr-- = padchar[rand_num];
423 /* Check the target directory. */
424 for (; ptr > template; --ptr) {
429 if (stat(template, &sbuf) != 0)
432 if (!S_ISDIR(sbuf.st_mode)) {
442 if (mkfifo(template, 0600) == 0) {
445 if ((fd = open(template, O_RDWR, 0600)) < 0) {
452 if (errno != EEXIST) {
458 * If we have a collision, cycle through the space of
461 for (ptr = start;;) {
464 if (*ptr == '\0' || ptr == pathend)
467 pad = strchr(padchar, *ptr);
468 if (pad == NULL || *++pad == '\0') {
480 catch_child(int sig __unused)
485 * In lieu of a good way to prevent every possible looping in make(1), stop
486 * there from being more than MKLVL_MAXVAL processes forked by make(1), to
487 * prevent a forkbomb from happening, in a dumb and mechanical way.
490 * Creates or modifies enviornment variable MKLVL_ENVVAR via setenv().
493 check_make_level(void)
495 char *value = getenv(MKLVL_ENVVAR);
496 int level = (value == NULL) ? 0 : atoi(value);
499 errc(2, EAGAIN, "Invalid value for recursion level (%d).",
501 } else if (level > MKLVL_MAXVAL) {
502 errc(2, EAGAIN, "Max recursion level (%d) exceeded.",
506 sprintf(new_value, "%d", level + 1);
507 setenv(MKLVL_ENVVAR, new_value, 1);
517 * Catch SIGCHLD so that we get kicked out of select() when we
518 * need to look at a child. This is only known to matter for the
519 * -j case (perhaps without -P).
521 * XXX this is intentionally misplaced.
525 sigemptyset(&sa.sa_mask);
526 sa.sa_flags = SA_RESTART | SA_NOCLDSTOP;
527 sa.sa_handler = catch_child;
528 sigaction(SIGCHLD, &sa, NULL);
534 * get rid of resource limit on file descriptors
538 if (getrlimit(RLIMIT_NOFILE, &rl) == -1) {
541 rl.rlim_cur = rl.rlim_max;
542 if (setrlimit(RLIMIT_NOFILE, &rl) == -1) {
550 * Signal handler - set a variable and defer handling to the main code.
553 catchsignal(int signo)
559 * Catch the four signals that POSIX specifies if they aren't ignored.
562 Proc_Setupsignals(Boolean compat)
566 sigemptyset(&sa.sa_mask);
568 sa.sa_handler = catchsignal;
570 if (signal(SIGHUP, SIG_IGN) != SIG_IGN) {
571 sigaction(SIGHUP, &sa, NULL);
573 if (signal(SIGINT, SIG_IGN) != SIG_IGN) {
574 sigaction(SIGINT, &sa, NULL);
576 if (signal(SIGQUIT, SIG_IGN) != SIG_IGN) {
577 sigaction(SIGQUIT, &sa, NULL);
579 if (signal(SIGTERM, SIG_IGN) != SIG_IGN) {
580 sigaction(SIGTERM, &sa, NULL);
588 * There are additional signals that need to be caught and
589 * passed if either the export system wants to be told
590 * directly of signals or if we're giving each job its own
591 * process group (since then it won't get signals from the
592 * terminal driver as we own the terminal)
595 if (signal(SIGTSTP, SIG_IGN) != SIG_IGN) {
596 sigaction(SIGTSTP, &sa, NULL);
598 if (signal(SIGTTOU, SIG_IGN) != SIG_IGN) {
599 sigaction(SIGTTOU, &sa, NULL);
601 if (signal(SIGTTIN, SIG_IGN) != SIG_IGN) {
602 sigaction(SIGTTIN, &sa, NULL);
604 if (signal(SIGWINCH, SIG_IGN) != SIG_IGN) {
605 sigaction(SIGWINCH, &sa, NULL);
611 * Wait for child process to terminate.
614 ProcWait(ProcStuff *ps)
620 * Wait for the process to exit.
623 pid = waitpid(ps->child_pid, &status, 0);
624 if (pid == -1 && errno != EINTR) {
625 Fatal("error in wait: %d", pid);
628 if (pid == ps->child_pid) {
641 * Pass a signal on to all local jobs if
642 * USE_PGRP is defined, then die ourselves.
645 * We die by the same signal.
648 JobPassSig(int signo)
651 sigset_t nmask, omask;
652 struct sigaction act;
655 sigaddset(&nmask, signo);
656 sigprocmask(SIG_SETMASK, &nmask, &omask);
658 DEBUGF(JOB, ("JobPassSig(%d) called.\n", signo));
659 TAILQ_FOREACH(job, &jobs, link) {
660 DEBUGF(JOB, ("JobPassSig passing signal %d to child %jd.\n",
661 signo, (intmax_t)job->pid));
662 KILL(job->pid, signo);
666 * Deal with proper cleanup based on the signal received. We only run
667 * the .INTERRUPT target if the signal was in fact an interrupt.
668 * The other three termination signals are more of a "get out *now*"
671 if (signo == SIGINT) {
672 JobInterrupt(TRUE, signo);
673 } else if (signo == SIGHUP || signo == SIGTERM || signo == SIGQUIT) {
674 JobInterrupt(FALSE, signo);
678 * Leave gracefully if SIGQUIT, rather than core dumping.
680 if (signo == SIGQUIT) {
685 * Send ourselves the signal now we've given the message to everyone
686 * else. Note we block everything else possible while we're getting
687 * the signal. This ensures that all our jobs get continued when we
688 * wake up before we take any other signal.
689 * XXX this comment seems wrong.
691 act.sa_handler = SIG_DFL;
692 sigemptyset(&act.sa_mask);
694 sigaction(signo, &act, NULL);
696 DEBUGF(JOB, ("JobPassSig passing signal to self, mask = %x.\n",
697 ~0 & ~(1 << (signo - 1))));
699 signal(signo, SIG_DFL);
700 KILL(getpid(), signo);
703 TAILQ_FOREACH(job, &jobs, link) {
704 DEBUGF(JOB, ("JobPassSig passing signal %d to child %jd.\n",
705 signo, (intmax_t)job->pid));
706 KILL(job->pid, signo);
709 sigprocmask(SIG_SETMASK, &omask, NULL);
710 sigprocmask(SIG_SETMASK, &omask, NULL);
711 act.sa_handler = JobPassSig;
712 sigaction(signo, &act, NULL);
717 * Put out another command for the given job. If the command starts
718 * with an @ or a - we process it specially. In the former case,
719 * so long as the -s and -n flags weren't given to make, we stick
720 * a shell-specific echoOff command in the script. In the latter,
721 * we ignore errors for the entire job, unless the shell has error
723 * If the command is just "..." we take all future commands for this
724 * job to be commands to be executed once the entire graph has been
725 * made and return non-zero to signal that the end of the commands
726 * was reached. These commands are later attached to the postCommands
727 * node and executed by Job_Finish when all things are done.
728 * This function is called from JobStart via LST_FOREACH.
731 * Always 0, unless the command was "..."
734 * If the command begins with a '-' and the shell has no error control,
735 * the JOB_IGNERR flag is set in the job descriptor.
736 * If the command is "..." and we're not ignoring such things,
737 * tailCmds is set to the successor node of the cmd.
738 * numCommands is incremented if the command is actually printed.
741 JobPrintCommand(char *cmd, Job *job)
743 Boolean noSpecials; /* true if we shouldn't worry about
744 * inserting special commands into
745 * the input stream. */
746 Boolean shutUp = FALSE; /* true if we put a no echo command
747 * into the command file */
748 Boolean errOff = FALSE; /* true if we turned error checking
749 * off before printing the command
750 * and need to turn it back on */
751 const char *cmdTemplate;/* Template to use when printing the command */
752 char *cmdStart; /* Start of expanded command */
753 LstNode *cmdNode; /* Node for replacing the command */
755 noSpecials = (noExecute && !(job->node->type & OP_MAKE));
757 if (strcmp(cmd, "...") == 0) {
758 job->node->type |= OP_SAVE_CMDS;
759 if ((job->flags & JOB_IGNDOTS) == 0) {
761 Lst_Succ(Lst_Member(&job->node->commands, cmd));
767 #define DBPRINTF(fmt, arg) \
768 DEBUGF(JOB, (fmt, arg)); \
769 fprintf(job->cmdFILE, fmt, arg); \
770 fflush(job->cmdFILE);
775 * For debugging, we replace each command with the result of expanding
776 * the variables in the command.
778 cmdNode = Lst_Member(&job->node->commands, cmd);
780 cmd = Buf_Peel(Var_Subst(cmd, job->node, FALSE));
783 Lst_Replace(cmdNode, cmdStart);
785 cmdTemplate = "%s\n";
788 * Check for leading @', -' or +'s to control echoing, error checking,
789 * and execution on -n.
791 while (*cmd == '@' || *cmd == '-' || *cmd == '+') {
795 shutUp = DEBUG(LOUD) ? FALSE : TRUE;
805 * We're not actually exececuting anything...
806 * but this one needs to be - use compat mode
809 Compat_RunCommand(cmd, job->node, NULL);
817 while (isspace((unsigned char)*cmd))
821 if (!(job->flags & JOB_SILENT) && !noSpecials &&
822 commandShell->hasEchoCtl) {
823 DBPRINTF("%s\n", commandShell->echoOff);
830 if (!(job->flags & JOB_IGNERR) && !noSpecials) {
831 if (commandShell->hasErrCtl) {
833 * We don't want the error-control commands
834 * showing up either, so we turn off echoing
835 * while executing them. We could put another
836 * field in the shell structure to tell
837 * JobDoOutput to look for this string too,
838 * but why make it any more complex than
841 if (!(job->flags & JOB_SILENT) && !shutUp &&
842 commandShell->hasEchoCtl) {
843 DBPRINTF("%s\n", commandShell->echoOff);
844 DBPRINTF("%s\n", commandShell->ignErr);
845 DBPRINTF("%s\n", commandShell->echoOn);
847 DBPRINTF("%s\n", commandShell->ignErr);
849 } else if (commandShell->ignErr &&
850 *commandShell->ignErr != '\0') {
852 * The shell has no error control, so we need to
853 * be weird to get it to ignore any errors from
854 * the command. If echoing is turned on, we turn
855 * it off and use the errCheck template to echo
856 * the command. Leave echoing off so the user
857 * doesn't see the weirdness we go through to
858 * ignore errors. Set cmdTemplate to use the
859 * weirdness instead of the simple "%s\n"
862 if (!(job->flags & JOB_SILENT) && !shutUp &&
863 commandShell->hasEchoCtl) {
864 DBPRINTF("%s\n", commandShell->echoOff);
865 DBPRINTF(commandShell->errCheck, cmd);
868 cmdTemplate = commandShell->ignErr;
870 * The error ignoration (hee hee) is already
871 * taken care of by the ignErr template, so
872 * pretend error checking is still on.
883 DBPRINTF(cmdTemplate, cmd);
887 * If echoing is already off, there's no point in issuing the
888 * echoOff command. Otherwise we issue it and pretend it was on
889 * for the whole command...
891 if (!shutUp && !(job->flags & JOB_SILENT) &&
892 commandShell->hasEchoCtl) {
893 DBPRINTF("%s\n", commandShell->echoOff);
896 DBPRINTF("%s\n", commandShell->errCheck);
899 DBPRINTF("%s\n", commandShell->echoOn);
906 * Called to close both input and output pipes when a job is finished.
909 * The file descriptors associated with the job are closed.
916 #if !defined(USE_KQUEUE)
917 FD_CLR(job->inPipe, &outputs);
919 if (job->outPipe != job->inPipe) {
922 JobDoOutput(job, TRUE);
926 JobDoOutput(job, TRUE);
932 * Do final processing for the given job including updating
933 * parents and starting new jobs as available/necessary. Note
934 * that we pay no attention to the JOB_IGNERR flag here.
935 * This is because when we're called because of a noexecute flag
936 * or something, jstat.w_status is 0 and when called from
937 * Job_CatchChildren, the status is zeroed if it s/b ignored.
940 * Some nodes may be put on the toBeMade queue.
941 * Final commands for the job are placed on postCommands.
943 * If we got an error and are aborting (aborting == ABORT_ERROR) and
944 * the job list is now empty, we are done for the day.
945 * If we recognized an error (errors !=0), we set the aborting flag
946 * to ABORT_ERROR so no more jobs will be started.
949 JobFinish(Job *job, int *status)
954 if (WIFEXITED(*status)) {
955 int job_status = WEXITSTATUS(*status);
959 * Deal with ignored errors in -B mode. We need to
960 * print a message telling of the ignored error as
961 * well as setting status.w_status to 0 so the next
962 * command gets run. To do this, we set done to be
963 * TRUE if in -B mode and the job exited non-zero.
965 if (job_status == 0) {
968 if (job->flags & JOB_IGNERR) {
972 * If it exited non-zero and either we're
973 * doing things our way or we're not ignoring
974 * errors, the job is finished. Similarly, if
975 * the shell died because of a signal the job
976 * is also finished. In these cases, finish
977 * out the job's output before printing the
981 if (job->cmdFILE != NULL &&
982 job->cmdFILE != stdout) {
983 fclose(job->cmdFILE);
988 } else if (WIFSIGNALED(*status)) {
989 if (WTERMSIG(*status) == SIGCONT) {
991 * No need to close things down or anything.
996 * If it exited non-zero and either we're
997 * doing things our way or we're not ignoring
998 * errors, the job is finished. Similarly, if
999 * the shell died because of a signal the job
1000 * is also finished. In these cases, finish
1001 * out the job's output before printing the
1005 if (job->cmdFILE != NULL &&
1006 job->cmdFILE != stdout) {
1007 fclose(job->cmdFILE);
1013 * No need to close things down or anything.
1018 if (WIFEXITED(*status)) {
1019 if (done || DEBUG(JOB)) {
1024 (job->flags & JOB_IGNERR)) {
1026 * If output is going to a file and this job
1027 * is ignoring errors, arrange to have the
1028 * exit status sent to the output file as
1031 out = fdopen(job->outFd, "w");
1033 Punt("Cannot fdopen");
1038 DEBUGF(JOB, ("Process %jd exited.\n",
1039 (intmax_t)job->pid));
1041 if (WEXITSTATUS(*status) == 0) {
1043 if (usePipes && job->node != lastNode) {
1044 MESSAGE(out, job->node);
1045 lastNode = job->node;
1048 "*** Completed successfully\n");
1051 if (usePipes && job->node != lastNode) {
1052 MESSAGE(out, job->node);
1053 lastNode = job->node;
1055 fprintf(out, "*** Error code %d%s\n",
1056 WEXITSTATUS(*status),
1057 (job->flags & JOB_IGNERR) ?
1060 if (job->flags & JOB_IGNERR) {
1067 } else if (WIFSIGNALED(*status)) {
1068 if (done || DEBUG(JOB) || (WTERMSIG(*status) == SIGCONT)) {
1073 (job->flags & JOB_IGNERR)) {
1075 * If output is going to a file and this job
1076 * is ignoring errors, arrange to have the
1077 * exit status sent to the output file as
1080 out = fdopen(job->outFd, "w");
1082 Punt("Cannot fdopen");
1087 if (WTERMSIG(*status) == SIGCONT) {
1089 * If the beastie has continued, shift the
1090 * Job from the stopped list to the running
1091 * one (or re-stop it if concurrency is
1092 * exceeded) and go and get another child.
1094 if (job->flags & (JOB_RESUME | JOB_RESTART)) {
1095 if (usePipes && job->node != lastNode) {
1096 MESSAGE(out, job->node);
1097 lastNode = job->node;
1099 fprintf(out, "*** Continued\n");
1101 if (!(job->flags & JOB_CONTINUING)) {
1102 DEBUGF(JOB, ("Warning: process %jd was not "
1103 "continuing.\n", (intmax_t) job->pid));
1106 * We don't really want to restart a
1107 * job from scratch just because it
1108 * continued, especially not without
1109 * killing the continuing process!
1110 * That's why this is ifdef'ed out.
1116 job->flags &= ~JOB_CONTINUING;
1117 TAILQ_INSERT_TAIL(&jobs, job, link);
1119 DEBUGF(JOB, ("Process %jd is continuing locally.\n",
1120 (intmax_t) job->pid));
1121 if (nJobs == maxJobs) {
1123 DEBUGF(JOB, ("Job queue is full.\n"));
1129 if (usePipes && job->node != lastNode) {
1130 MESSAGE(out, job->node);
1131 lastNode = job->node;
1134 "*** Signal %d\n", WTERMSIG(*status));
1142 if (compatMake && !usePipes && (job->flags & JOB_IGNERR)) {
1144 * If output is going to a file and this job
1145 * is ignoring errors, arrange to have the
1146 * exit status sent to the output file as
1149 out = fdopen(job->outFd, "w");
1151 Punt("Cannot fdopen");
1156 DEBUGF(JOB, ("Process %jd stopped.\n", (intmax_t) job->pid));
1157 if (usePipes && job->node != lastNode) {
1158 MESSAGE(out, job->node);
1159 lastNode = job->node;
1161 fprintf(out, "*** Stopped -- signal %d\n", WSTOPSIG(*status));
1162 job->flags |= JOB_RESUME;
1163 TAILQ_INSERT_TAIL(&stoppedJobs, job, link);
1169 * Now handle the -B-mode stuff. If the beast still isn't finished,
1170 * try and restart the job on the next command. If JobStart says it's
1171 * ok, it's ok. If there's an error, this puppy is done.
1173 if (compatMake && WIFEXITED(*status) &&
1174 Lst_Succ(job->node->compat_command) != NULL) {
1175 switch (JobStart(job->node, job->flags & JOB_IGNDOTS, job)) {
1181 W_SETEXITSTATUS(status, 1);
1185 * If we got back a JOB_FINISHED code, JobStart has
1186 * already called Make_Update and freed the job
1187 * descriptor. We set done to false here to avoid fake
1188 * cycles and double frees. JobStart needs to do the
1189 * update so we can proceed up the graph when given
1201 if (done && aborting != ABORT_ERROR &&
1202 aborting != ABORT_INTERRUPT && *status == 0) {
1204 * As long as we aren't aborting and the job didn't return a
1205 * non-zero status that we shouldn't ignore, we call
1206 * Make_Update to update the parents. In addition, any saved
1207 * commands for the node are placed on the .END target.
1209 for (ln = job->tailCmds; ln != NULL; ln = LST_NEXT(ln)) {
1210 Lst_AtEnd(&postCommands->commands,
1212 Var_Subst(Lst_Datum(ln), job->node, FALSE)));
1215 job->node->made = MADE;
1216 Make_Update(job->node);
1219 } else if (*status != 0) {
1227 * Set aborting if any error.
1229 if (errors && !keepgoing && aborting != ABORT_INTERRUPT) {
1231 * If we found any errors in this batch of children and the -k
1232 * flag wasn't given, we set the aborting flag so no more jobs
1235 aborting = ABORT_ERROR;
1238 if (aborting == ABORT_ERROR && Job_Empty()) {
1240 * If we are aborting and the job table is now empty, we finish.
1248 * Touch the given target. Called by JobStart when the -t flag was
1249 * given. Prints messages unless told to be silent.
1252 * The data modification of the file is changed. In addition, if the
1253 * file did not exist, it is created.
1256 Job_Touch(GNode *gn, Boolean silent)
1258 int streamID; /* ID of stream opened to do the touch */
1259 struct utimbuf times; /* Times for utime() call */
1261 if (gn->type & (OP_JOIN | OP_USE | OP_EXEC | OP_OPTIONAL)) {
1263 * .JOIN, .USE, .ZEROTIME and .OPTIONAL targets are "virtual"
1264 * targets and, as such, shouldn't really be created.
1270 fprintf(stdout, "touch %s\n", gn->name);
1278 if (gn->type & OP_ARCHV) {
1280 } else if (gn->type & OP_LIB) {
1283 char *file = gn->path ? gn->path : gn->name;
1285 times.actime = times.modtime = now;
1286 if (utime(file, ×) < 0) {
1287 streamID = open(file, O_RDWR | O_CREAT, 0666);
1289 if (streamID >= 0) {
1293 * Read and write a byte to the file to change
1294 * the modification time, then close the file.
1296 if (read(streamID, &c, 1) == 1) {
1297 lseek(streamID, (off_t)0, SEEK_SET);
1298 write(streamID, &c, 1);
1303 fprintf(stdout, "*** couldn't touch %s: %s",
1304 file, strerror(errno));
1313 * Make sure the given node has all the commands it needs.
1316 * TRUE if the commands list is/was ok.
1319 * The node will have commands from the .DEFAULT rule added to it
1323 Job_CheckCommands(GNode *gn, void (*abortProc)(const char *, ...))
1326 if (OP_NOP(gn->type) && Lst_IsEmpty(&gn->commands) &&
1327 (gn->type & OP_LIB) == 0) {
1329 * No commands. Look for .DEFAULT rule from which we might infer
1332 if (DEFAULT != NULL && !Lst_IsEmpty(&DEFAULT->commands)) {
1334 * Make only looks for a .DEFAULT if the node was
1335 * never the target of an operator, so that's what we
1336 * do too. If a .DEFAULT was given, we substitute its
1337 * commands for gn's commands and set the IMPSRC
1338 * variable to be the target's name The DEFAULT node
1339 * acts like a transformation rule, in that gn also
1340 * inherits any attributes or sources attached to
1343 Make_HandleUse(DEFAULT, gn);
1344 Var_Set(IMPSRC, Var_Value(TARGET, gn), gn);
1346 } else if (Dir_MTime(gn) == 0) {
1348 * The node wasn't the target of an operator we have
1349 * no .DEFAULT rule to go on and the target doesn't
1350 * already exist. There's nothing more we can do for
1351 * this branch. If the -k flag wasn't given, we stop
1352 * in our tracks, otherwise we just don't update
1353 * this node's parents so they never get examined.
1355 static const char msg[] =
1356 "make: don't know how to make";
1358 if (gn->type & OP_OPTIONAL) {
1359 fprintf(stdout, "%s %s(ignored)\n",
1362 } else if (keepgoing) {
1363 fprintf(stdout, "%s %s(continuing)\n",
1369 if (strcmp(gn->name,"love") == 0)
1370 (*abortProc)("Not war.");
1373 (*abortProc)("%s %s. Stop",
1384 * Execute the shell for the given job. Called from JobStart and
1388 * A shell is executed, outputs is altered and the Job structure added
1392 JobExec(Job *job, char **argv)
1399 DEBUGF(JOB, ("Running %s\n", job->node->name));
1400 DEBUGF(JOB, ("\tCommand: "));
1401 for (i = 0; argv[i] != NULL; i++) {
1402 DEBUGF(JOB, ("%s ", argv[i]));
1404 DEBUGF(JOB, ("\n"));
1408 * Some jobs produce no output and it's disconcerting to have
1409 * no feedback of their running (since they produce no output, the
1410 * banner with their name in it never appears). This is an attempt to
1411 * provide that feedback, even if nothing follows it.
1413 if (lastNode != job->node && (job->flags & JOB_FIRST) &&
1414 !(job->flags & JOB_SILENT)) {
1415 MESSAGE(stdout, job->node);
1416 lastNode = job->node;
1419 ps.in = FILENO(job->cmdFILE);
1422 * Set up the child's output to be routed through the
1423 * pipe we've created for it.
1425 ps.out = job->outPipe;
1428 * We're capturing output in a file, so we duplicate
1429 * the descriptor to the temporary file into the
1432 ps.out = job->outFd;
1434 ps.err = STDERR_FILENO;
1436 ps.merge_errors = 1;
1444 * Fork. Warning since we are doing vfork() instead of fork(),
1445 * do not allocate memory in the child process!
1447 if ((ps.child_pid = vfork()) == -1) {
1448 Punt("Cannot fork");
1450 } else if (ps.child_pid == 0) {
1464 job->pid = ps.child_pid;
1466 if (usePipes && (job->flags & JOB_FIRST)) {
1468 * The first time a job is run for a node, we set the
1469 * current position in the buffer to the beginning and
1470 * mark another stream to watch in the outputs mask.
1473 struct kevent kev[2];
1477 #if defined(USE_KQUEUE)
1478 EV_SET(&kev[0], job->inPipe, EVFILT_READ, EV_ADD, 0, 0, job);
1479 EV_SET(&kev[1], job->pid, EVFILT_PROC,
1480 EV_ADD | EV_ONESHOT, NOTE_EXIT, 0, NULL);
1481 if (kevent(kqfd, kev, 2, NULL, 0, NULL) != 0) {
1483 * kevent() will fail if the job is already
1486 if (errno != EINTR && errno != EBADF && errno != ESRCH)
1487 Punt("kevent: %s", strerror(errno));
1490 FD_SET(job->inPipe, &outputs);
1491 #endif /* USE_KQUEUE */
1494 if (job->cmdFILE != NULL && job->cmdFILE != stdout) {
1495 fclose(job->cmdFILE);
1496 job->cmdFILE = NULL;
1500 * Now the job is actually running, add it to the table.
1503 TAILQ_INSERT_TAIL(&jobs, job, link);
1504 if (nJobs == maxJobs) {
1512 * Create the argv needed to execute the shell for a given job.
1515 JobMakeArgv(Job *job, char **argv)
1518 static char args[10]; /* For merged arguments */
1520 argv[0] = commandShell->name;
1523 if ((commandShell->exit && *commandShell->exit != '-') ||
1524 (commandShell->echo && *commandShell->echo != '-')) {
1526 * At least one of the flags doesn't have a minus before it, so
1527 * merge them together. Have to do this because the *(&(@*#*&#$#
1528 * Bourne shell thinks its second argument is a file to source.
1529 * Grrrr. Note the ten-character limitation on the combined
1532 sprintf(args, "-%s%s", (job->flags & JOB_IGNERR) ? "" :
1533 commandShell->exit ? commandShell->exit : "",
1534 (job->flags & JOB_SILENT) ? "" :
1535 commandShell->echo ? commandShell->echo : "");
1542 if (!(job->flags & JOB_IGNERR) && commandShell->exit) {
1543 argv[argc] = commandShell->exit;
1546 if (!(job->flags & JOB_SILENT) && commandShell->echo) {
1547 argv[argc] = commandShell->echo;
1556 * Restart a job that stopped for some reason. The job must be neither
1557 * on the jobs nor on the stoppedJobs list.
1560 * jobFull will be set if the job couldn't be run.
1563 JobRestart(Job *job)
1566 if (job->flags & JOB_RESTART) {
1568 * Set up the control arguments to the shell. This is based on
1569 * the flags set earlier for this job. If the JOB_IGNERR flag
1570 * is clear, the 'exit' flag of the commandShell is used to
1571 * cause it to exit upon receiving an error. If the JOB_SILENT
1572 * flag is clear, the 'echo' flag of the commandShell is used
1573 * to get it to start echoing as soon as it starts
1574 * processing commands.
1578 JobMakeArgv(job, argv);
1580 DEBUGF(JOB, ("Restarting %s...", job->node->name));
1581 if (nJobs >= maxJobs && !(job->flags & JOB_SPECIAL)) {
1583 * Not allowed to run -- put it back on the hold
1584 * queue and mark the table full
1586 DEBUGF(JOB, ("holding\n"));
1587 TAILQ_INSERT_HEAD(&stoppedJobs, job, link);
1589 DEBUGF(JOB, ("Job queue is full.\n"));
1593 * Job may be run locally.
1595 DEBUGF(JOB, ("running locally\n"));
1601 * The job has stopped and needs to be restarted.
1602 * Why it stopped, we don't know...
1604 DEBUGF(JOB, ("Resuming %s...", job->node->name));
1605 if ((nJobs < maxJobs || ((job->flags & JOB_SPECIAL) &&
1606 maxJobs == 0)) && nJobs != maxJobs) {
1608 * If we haven't reached the concurrency limit already
1609 * (or the job must be run and maxJobs is 0), it's ok
1615 error = (KILL(job->pid, SIGCONT) != 0);
1619 * Make sure the user knows we've continued
1620 * the beast and actually put the thing in the
1623 job->flags |= JOB_CONTINUING;
1625 W_SETTERMSIG(&status, SIGCONT);
1626 JobFinish(job, &status);
1628 job->flags &= ~(JOB_RESUME|JOB_CONTINUING);
1629 DEBUGF(JOB, ("done\n"));
1631 Error("couldn't resume %s: %s",
1632 job->node->name, strerror(errno));
1634 W_SETEXITSTATUS(&status, 1);
1635 JobFinish(job, &status);
1639 * Job cannot be restarted. Mark the table as full and
1640 * place the job back on the list of stopped jobs.
1642 DEBUGF(JOB, ("table full\n"));
1643 TAILQ_INSERT_HEAD(&stoppedJobs, job, link);
1645 DEBUGF(JOB, ("Job queue is full.\n"));
1652 * Start a target-creation process going for the target described
1653 * by the graph node gn.
1656 * JOB_ERROR if there was an error in the commands, JOB_FINISHED
1657 * if there isn't actually anything left to do for the job and
1658 * JOB_RUNNING if the job has been started.
1661 * A new Job node is created and added to the list of running
1662 * jobs. PMake is forked and a child shell created.
1665 JobStart(GNode *gn, int flags, Job *previous)
1667 Job *job; /* new job descriptor */
1668 char *argv[4]; /* Argument vector to shell */
1669 Boolean cmdsOK; /* true if the nodes commands were all right */
1670 Boolean noExec; /* Set true if we decide not to run the job */
1671 int tfd; /* File descriptor for temp file */
1673 char tfile[sizeof(TMPPAT)];
1676 JobPassSig(interrupted);
1679 if (previous != NULL) {
1680 previous->flags &= ~(JOB_FIRST | JOB_IGNERR | JOB_SILENT);
1683 job = emalloc(sizeof(Job));
1688 job->tailCmds = NULL;
1691 * Set the initial value of the flags for this job based on the global
1692 * ones and the node's attributes... Any flags supplied by the caller
1693 * are also added to the field.
1696 if (Targ_Ignore(gn)) {
1697 job->flags |= JOB_IGNERR;
1699 if (Targ_Silent(gn)) {
1700 job->flags |= JOB_SILENT;
1702 job->flags |= flags;
1705 * Check the commands now so any attributes from .DEFAULT have a chance
1706 * to migrate to the node.
1708 if (!compatMake && (job->flags & JOB_FIRST)) {
1709 cmdsOK = Job_CheckCommands(gn, Error);
1715 * If the -n flag wasn't given, we open up OUR (not the child's)
1716 * temporary file to stuff commands in it. The thing is rd/wr so we
1717 * don't need to reopen it to feed it to the shell. If the -n flag
1718 * *was* given, we just set the file to be stdout. Cute, huh?
1720 if ((gn->type & OP_MAKE) || (!noExecute && !touchFlag)) {
1722 * We're serious here, but if the commands were bogus, we're
1729 strcpy(tfile, TMPPAT);
1730 if ((tfd = mkstemp(tfile)) == -1)
1731 Punt("Cannot create temp file: %s", strerror(errno));
1732 job->cmdFILE = fdopen(tfd, "w+");
1734 if (job->cmdFILE == NULL) {
1736 Punt("Could not open %s", tfile);
1738 fcntl(FILENO(job->cmdFILE), F_SETFD, 1);
1740 * Send the commands to the command file, flush all its
1741 * buffers then rewind and remove the thing.
1746 * Used to be backwards; replace when start doing multiple
1747 * commands per shell.
1751 * Be compatible: If this is the first time for this
1752 * node, verify its commands are ok and open the
1753 * commands list for sequential access by later
1754 * invocations of JobStart. Once that is done, we take
1755 * the next command off the list and print it to the
1756 * command file. If the command was an ellipsis, note
1757 * that there's nothing more to execute.
1759 if (job->flags & JOB_FIRST)
1760 gn->compat_command = Lst_First(&gn->commands);
1762 gn->compat_command =
1763 Lst_Succ(gn->compat_command);
1765 if (gn->compat_command == NULL ||
1766 JobPrintCommand(Lst_Datum(gn->compat_command), job))
1769 if (noExec && !(job->flags & JOB_FIRST)) {
1771 * If we're not going to execute anything, the
1772 * job is done and we need to close down the
1773 * various file descriptors we've opened for
1774 * output, then call JobDoOutput to catch the
1775 * final characters or send the file to the
1776 * screen... Note that the i/o streams are only
1777 * open if this isn't the first job. Note also
1778 * that this could not be done in
1779 * Job_CatchChildren b/c it wasn't clear if
1780 * there were more commands to execute or not...
1786 * We can do all the commands at once. hooray for sanity
1789 LST_FOREACH(ln, &gn->commands) {
1790 if (JobPrintCommand(Lst_Datum(ln), job))
1795 * If we didn't print out any commands to the shell
1796 * script, there's not much point in executing the
1799 if (numCommands == 0) {
1804 } else if (noExecute) {
1806 * Not executing anything -- just print all the commands to
1807 * stdout in one fell swoop. This will still set up
1808 * job->tailCmds correctly.
1810 if (lastNode != gn) {
1811 MESSAGE(stdout, gn);
1814 job->cmdFILE = stdout;
1817 * Only print the commands if they're ok, but don't die if
1818 * they're not -- just let the user know they're bad and keep
1819 * going. It doesn't do any harm in this case and may do
1823 LST_FOREACH(ln, &gn->commands) {
1824 if (JobPrintCommand(Lst_Datum(ln), job))
1829 * Don't execute the shell, thank you.
1835 * Just touch the target and note that no shell should be
1836 * executed. Set cmdFILE to stdout to make life easier. Check
1837 * the commands, too, but don't die if they're no good -- it
1838 * does no harm to keep working up the graph.
1840 job->cmdFILE = stdout;
1841 Job_Touch(gn, job->flags & JOB_SILENT);
1846 * If we're not supposed to execute a shell, don't.
1850 * Unlink and close the command file if we opened one
1852 if (job->cmdFILE != stdout) {
1853 if (job->cmdFILE != NULL)
1854 fclose(job->cmdFILE);
1860 * We only want to work our way up the graph if we aren't here
1861 * because the commands for the job were no good.
1864 if (aborting == 0) {
1865 for (ln = job->tailCmds; ln != NULL;
1866 ln = LST_NEXT(ln)) {
1867 Lst_AtEnd(&postCommands->commands,
1868 Buf_Peel(Var_Subst(Lst_Datum(ln),
1869 job->node, FALSE)));
1871 job->node->made = MADE;
1872 Make_Update(job->node);
1875 return(JOB_FINISHED);
1881 fflush(job->cmdFILE);
1885 * Set up the control arguments to the shell. This is based on the flags
1886 * set earlier for this job.
1888 JobMakeArgv(job, argv);
1891 * If we're using pipes to catch output, create the pipe by which we'll
1892 * get the shell's output. If we're using files, print out that we're
1893 * starting a job and then set up its temporary-file name.
1895 if (!compatMake || (job->flags & JOB_FIRST)) {
1900 Punt("Cannot create pipe: %s", strerror(errno));
1901 job->inPipe = fd[0];
1902 job->outPipe = fd[1];
1903 fcntl(job->inPipe, F_SETFD, 1);
1904 fcntl(job->outPipe, F_SETFD, 1);
1906 fprintf(stdout, "Remaking `%s'\n", gn->name);
1908 strcpy(job->outFile, TMPPAT);
1909 if ((job->outFd = mkstemp(job->outFile)) == -1)
1910 Punt("cannot create temp file: %s",
1912 fcntl(job->outFd, F_SETFD, 1);
1916 if (nJobs >= maxJobs && !(job->flags & JOB_SPECIAL) && maxJobs != 0) {
1918 * We've hit the limit of concurrency, so put the job on hold
1919 * until some other job finishes. Note that the special jobs
1920 * (.BEGIN, .INTERRUPT and .END) may be run even when the
1921 * limit has been reached (e.g. when maxJobs == 0).
1925 DEBUGF(JOB, ("Can only run job locally.\n"));
1926 job->flags |= JOB_RESTART;
1927 TAILQ_INSERT_TAIL(&stoppedJobs, job, link);
1929 if (nJobs >= maxJobs) {
1931 * If we're running this job as a special case
1932 * (see above), at least say the table is full.
1935 DEBUGF(JOB, ("Local job queue is full.\n"));
1939 return (JOB_RUNNING);
1943 JobOutput(Job *job, char *cp, char *endp, int msg)
1947 if (commandShell->noPrint) {
1948 ecp = strstr(cp, commandShell->noPrint);
1949 while (ecp != NULL) {
1952 if (msg && job->node != lastNode) {
1953 MESSAGE(stdout, job->node);
1954 lastNode = job->node;
1957 * The only way there wouldn't be a newline
1958 * after this line is if it were the last in
1959 * the buffer. However, since the non-printable
1960 * comes after it, there must be a newline, so
1961 * we don't print one.
1963 fprintf(stdout, "%s", cp);
1966 cp = ecp + strlen(commandShell->noPrint);
1969 * Still more to print, look again after
1970 * skipping the whitespace following the
1971 * non-printable command....
1974 while (*cp == ' ' || *cp == '\t' ||
1978 ecp = strstr(cp, commandShell->noPrint);
1989 * This function is called at different times depending on
1990 * whether the user has specified that output is to be collected
1991 * via pipes or temporary files. In the former case, we are called
1992 * whenever there is something to read on the pipe. We collect more
1993 * output from the given job and store it in the job's outBuf. If
1994 * this makes up a line, we print it tagged by the job's identifier,
1996 * If output has been collected in a temporary file, we open the
1997 * file and read it line by line, transfering it to our own
1998 * output channel until the file is empty. At which point we
1999 * remove the temporary file.
2000 * In both cases, however, we keep our figurative eye out for the
2001 * 'noPrint' line for the shell from which the output came. If
2002 * we recognize a line, we don't print it. If the command is not
2003 * alone on the line (the character after it is not \0 or \n), we
2004 * do print whatever follows it.
2007 * curPos may be shifted as may the contents of outBuf.
2010 JobDoOutput(Job *job, Boolean finish)
2012 Boolean gotNL = FALSE; /* true if got a newline */
2013 Boolean fbuf; /* true if our buffer filled up */
2014 int nr; /* number of bytes read */
2015 int i; /* auxiliary index into outBuf */
2016 int max; /* limit for i (end of current data) */
2017 int nRead; /* (Temporary) number of bytes read */
2018 FILE *oFILE; /* Stream pointer to shell's output file */
2023 * Read as many bytes as will fit in the buffer.
2029 nRead = read(job->inPipe, &job->outBuf[job->curPos],
2030 JOB_BUFSIZE - job->curPos);
2032 * Check for interrupt here too, because the above read may
2033 * block when the child process is stopped. In this case the
2034 * interrupt will unblock it (we don't use SA_RESTART).
2037 JobPassSig(interrupted);
2040 DEBUGF(JOB, ("JobDoOutput(piperead)"));
2047 * If we hit the end-of-file (the job is dead), we must flush
2048 * its remaining output, so pretend we read a newline if
2049 * there's any output remaining in the buffer.
2050 * Also clear the 'finish' flag so we stop looping.
2052 if (nr == 0 && job->curPos != 0) {
2053 job->outBuf[job->curPos] = '\n';
2056 } else if (nr == 0) {
2061 * Look for the last newline in the bytes we just got. If there
2062 * is one, break out of the loop with 'i' as its index and
2065 max = job->curPos + nr;
2066 for (i = job->curPos + nr - 1; i >= job->curPos; i--) {
2067 if (job->outBuf[i] == '\n') {
2070 } else if (job->outBuf[i] == '\0') {
2074 job->outBuf[i] = ' ';
2080 if (job->curPos == JOB_BUFSIZE) {
2082 * If we've run out of buffer space, we have
2083 * no choice but to print the stuff. sigh.
2089 if (gotNL || fbuf) {
2091 * Need to send the output to the screen. Null terminate
2092 * it first, overwriting the newline character if there
2093 * was one. So long as the line isn't one we should
2094 * filter (according to the shell description), we print
2095 * the line, preceded by a target banner if this target
2096 * isn't the same as the one for which we last printed
2097 * something. The rest of the data in the buffer are
2098 * then shifted down to the start of the buffer and
2099 * curPos is set accordingly.
2101 job->outBuf[i] = '\0';
2102 if (i >= job->curPos) {
2105 cp = JobOutput(job, job->outBuf,
2106 &job->outBuf[i], FALSE);
2109 * There's still more in that buffer. This time,
2110 * though, we know there's no newline at the
2111 * end, so we add one of our own free will.
2114 if (job->node != lastNode) {
2115 MESSAGE(stdout, job->node);
2116 lastNode = job->node;
2118 fprintf(stdout, "%s%s", cp,
2124 /* shift the remaining characters down */
2125 memcpy(job->outBuf, &job->outBuf[i + 1],
2127 job->curPos = max - (i + 1);
2131 * We have written everything out, so we just
2132 * start over from the start of the buffer.
2133 * No copying. No nothing.
2140 * If the finish flag is true, we must loop until we hit
2141 * end-of-file on the pipe. This is guaranteed to happen
2142 * eventually since the other end of the pipe is now
2143 * closed (we closed it explicitly and the child has
2144 * exited). When we do get an EOF, finish will be set
2145 * FALSE and we'll fall through and out.
2152 * We've been called to retrieve the output of the job from the
2153 * temporary file where it's been squirreled away. This consists
2154 * of opening the file, reading the output line by line, being
2155 * sure not to print the noPrint line for the shell we used,
2156 * then close and remove the temporary file. Very simple.
2158 * Change to read in blocks and do FindSubString type things
2159 * as for pipes? That would allow for "@echo -n..."
2161 oFILE = fopen(job->outFile, "r");
2162 if (oFILE != NULL) {
2163 fprintf(stdout, "Results of making %s:\n",
2167 while (fgets(inLine, sizeof(inLine), oFILE) != NULL) {
2168 char *cp, *endp, *oendp;
2171 oendp = endp = inLine + strlen(inLine);
2172 if (endp[-1] == '\n') {
2175 cp = JobOutput(job, inLine, endp, FALSE);
2178 * There's still more in that buffer. This time,
2179 * though, we know there's no newline at the
2180 * end, so we add one of our own free will.
2182 fprintf(stdout, "%s", cp);
2184 if (endp != oendp) {
2185 fprintf(stdout, "\n");
2190 eunlink(job->outFile);
2197 * Handle the exit of a child. Called from Make_Make.
2200 * The job descriptor is removed from the list of children.
2203 * We do waits, blocking or not, according to the wisdom of our
2204 * caller, until there are no more children to report. For each
2205 * job, call JobFinish to finish things off. This will take care of
2206 * putting jobs on the stoppedJobs queue.
2209 Job_CatchChildren(Boolean block)
2211 pid_t pid; /* pid of dead child */
2212 Job *job; /* job descriptor for dead child */
2213 int status; /* Exit/termination status */
2216 * Don't even bother if we know there's no one around.
2223 pid = waitpid((pid_t)-1, &status,
2224 (block ? 0 : WNOHANG) | WUNTRACED);
2228 DEBUGF(JOB, ("Process %jd exited or stopped.\n",
2231 TAILQ_FOREACH(job, &jobs, link) {
2232 if (job->pid == pid)
2237 if (WIFSIGNALED(status) &&
2238 (WTERMSIG(status) == SIGCONT)) {
2239 TAILQ_FOREACH(job, &jobs, link) {
2240 if (job->pid == pid)
2244 Error("Resumed child (%jd) "
2245 "not in table", (intmax_t)pid);
2248 TAILQ_REMOVE(&stoppedJobs, job, link);
2250 Error("Child (%jd) not in table?",
2255 TAILQ_REMOVE(&jobs, job, link);
2257 if (fifoFd >= 0 && maxJobs > 1) {
2258 write(fifoFd, "+", 1);
2260 if (nJobs >= maxJobs)
2265 DEBUGF(JOB, ("Job queue is no longer full.\n"));
2270 JobFinish(job, &status);
2273 JobPassSig(interrupted);
2278 * Catch the output from our children, if we're using
2279 * pipes do so. Otherwise just block time until we get a
2280 * signal(most likely a SIGCHLD) since there's no point in
2281 * just spinning when there's nothing to do and the reaping
2282 * of a child can wait for a while.
2285 * Output is read from pipes if we're piping.
2289 Job_CatchOutput(int flag __unused)
2291 Job_CatchOutput(int flag)
2297 struct kevent kev[KEV_SIZE];
2300 struct timeval timeout;
2309 if ((nfds = kevent(kqfd, NULL, 0, kev, KEV_SIZE, NULL)) == -1) {
2311 Punt("kevent: %s", strerror(errno));
2313 JobPassSig(interrupted);
2315 for (i = 0; i < nfds; i++) {
2316 if (kev[i].flags & EV_ERROR) {
2317 warnc(kev[i].data, "kevent");
2320 switch (kev[i].filter) {
2322 JobDoOutput(kev[i].udata, FALSE);
2326 * Just wake up and let
2327 * Job_CatchChildren() collect the
2336 timeout.tv_sec = SEL_SEC;
2337 timeout.tv_usec = SEL_USEC;
2338 if (flag && jobFull && fifoFd >= 0)
2339 FD_SET(fifoFd, &readfds);
2341 nfds = select(FD_SETSIZE, &readfds, (fd_set *)NULL,
2342 (fd_set *)NULL, &timeout);
2345 JobPassSig(interrupted);
2348 if (fifoFd >= 0 && FD_ISSET(fifoFd, &readfds)) {
2352 job = TAILQ_FIRST(&jobs);
2353 while (nfds != 0 && job != NULL) {
2354 if (FD_ISSET(job->inPipe, &readfds)) {
2355 JobDoOutput(job, FALSE);
2358 job = TAILQ_NEXT(job, link);
2360 #endif /* !USE_KQUEUE */
2366 * Start the creation of a target. Basically a front-end for
2367 * JobStart used by the Make module.
2370 * Another job is started.
2376 JobStart(gn, 0, NULL);
2381 * Initialize the process module, given a maximum number of jobs.
2384 * lists and counters are initialized
2387 Job_Init(int maxproc)
2389 GNode *begin; /* node for commands to do at the very start */
2393 env = getenv("MAKE_JOBS_FIFO");
2395 if (env == NULL && maxproc > 1) {
2397 * We did not find the environment variable so we are the
2398 * leader. Create the fifo, open it, write one char per
2399 * allowed job into the pipe.
2401 fifoFd = mkfifotemp(fifoName);
2406 fcntl(fifoFd, F_SETFL, O_NONBLOCK);
2408 setenv("MAKE_JOBS_FIFO", env, 1);
2409 while (maxproc-- > 0) {
2410 write(fifoFd, "+", 1);
2412 /* The master make does not get a magic token */
2417 } else if (env != NULL) {
2419 * We had the environment variable so we are a slave.
2420 * Open fifo and give ourselves a magic token which represents
2421 * the token our parent make has grabbed to start his make
2422 * process. Otherwise the sub-makes would gobble up tokens and
2423 * the proper number of tokens to specify to -j would depend
2424 * on the depth of the tree and the order of execution.
2426 fifoFd = open(env, O_RDWR, 0);
2428 fcntl(fifoFd, F_SETFL, O_NONBLOCK);
2445 if ((maxJobs == 1 && fifoFd < 0) || beVerbose == 0) {
2447 * If only one job can run at a time, there's no need for a
2448 * banner, no is there?
2455 Proc_Setupsignals(FALSE);
2458 if ((kqfd = kqueue()) == -1) {
2459 Punt("kqueue: %s", strerror(errno));
2463 begin = Targ_FindNode(".BEGIN", TARG_NOCREATE);
2465 if (begin != NULL) {
2466 JobStart(begin, JOB_SPECIAL, (Job *)NULL);
2469 Job_CatchChildren(!usePipes);
2472 postCommands = Targ_FindNode(".END", TARG_CREATE);
2477 * See if the job table is full. It is considered full if it is OR
2478 * if we are in the process of aborting OR if we have
2479 * reached/exceeded our local quota. This prevents any more jobs
2483 * TRUE if the job table is full, FALSE otherwise
2493 if (fifoFd >= 0 && jobFull) {
2494 i = read(fifoFd, &c, 1);
2505 * See if the job table is empty. Because the local concurrency may
2506 * be set to 0, it is possible for the job table to become empty,
2507 * while the list of stoppedJobs remains non-empty. In such a case,
2508 * we want to restart as many jobs as we can.
2511 * TRUE if it is. FALSE if it ain't.
2517 if (!TAILQ_EMPTY(&stoppedJobs) && !aborting) {
2519 * The job table is obviously not full if it has no
2520 * jobs in it...Try and restart the stopped jobs.
2535 * Handle the receipt of an interrupt.
2538 * All children are killed. Another job will be started if the
2539 * .INTERRUPT target was given.
2542 JobInterrupt(int runINTERRUPT, int signo)
2544 Job *job; /* job descriptor in that element */
2545 GNode *interrupt; /* the node describing the .INTERRUPT target */
2547 aborting = ABORT_INTERRUPT;
2549 TAILQ_FOREACH(job, &jobs, link) {
2550 if (!Targ_Precious(job->node)) {
2551 char *file = (job->node->path == NULL ?
2552 job->node->name : job->node->path);
2554 if (!noExecute && eunlink(file) != -1) {
2555 Error("*** %s removed", file);
2559 DEBUGF(JOB, ("JobInterrupt passing signal to child "
2560 "%jd.\n", (intmax_t)job->pid));
2561 KILL(job->pid, signo);
2565 if (runINTERRUPT && !touchFlag) {
2567 * clear the interrupted flag because we would get an
2568 * infinite loop otherwise.
2572 interrupt = Targ_FindNode(".INTERRUPT", TARG_NOCREATE);
2573 if (interrupt != NULL) {
2574 ignoreErrors = FALSE;
2576 JobStart(interrupt, JOB_IGNDOTS, (Job *)NULL);
2579 Job_CatchChildren(!usePipes);
2587 * Do final processing such as the running of the commands
2588 * attached to the .END target.
2591 * Number of errors reported.
2597 if (postCommands != NULL && !Lst_IsEmpty(&postCommands->commands)) {
2599 Error("Errors reported so .END ignored");
2601 JobStart(postCommands, JOB_SPECIAL | JOB_IGNDOTS, NULL);
2605 Job_CatchChildren(!usePipes);
2620 * Waits for all running jobs to finish and returns. Sets 'aborting'
2621 * to ABORT_WAIT to prevent other jobs from starting.
2624 * Currently running jobs finish.
2630 aborting = ABORT_WAIT;
2631 while (nJobs != 0) {
2633 Job_CatchChildren(!usePipes);
2640 * Abort all currently running jobs without handling output or anything.
2641 * This function is to be called only in the event of a major
2642 * error. Most definitely NOT to be called from JobInterrupt.
2645 * All children are killed, not just the firstborn
2650 Job *job; /* the job descriptor in that element */
2653 aborting = ABORT_ERROR;
2656 TAILQ_FOREACH(job, &jobs, link) {
2658 * kill the child process with increasingly drastic
2659 * signals to make darn sure it's dead.
2661 KILL(job->pid, SIGINT);
2662 KILL(job->pid, SIGKILL);
2667 * Catch as many children as want to report in at first, then give up
2669 while (waitpid((pid_t)-1, &status, WNOHANG) > 0)
2675 * Tries to restart stopped jobs if there are slots available.
2676 * Note that this tries to restart them regardless of pending errors.
2677 * It's not good to leave stopped jobs lying around!
2680 * Resumes(and possibly migrates) jobs.
2683 JobRestartJobs(void)
2687 while (!jobFull && (job = TAILQ_FIRST(&stoppedJobs)) != NULL) {
2688 DEBUGF(JOB, ("Job queue is not full. "
2689 "Restarting a stopped job.\n"));
2690 TAILQ_REMOVE(&stoppedJobs, job, link);
2697 * Execute the command in cmd, and return the output of that command
2701 * A string containing the output of the command, or the empty string
2702 * If error is not NULL, it contains the reason for the command failure
2703 * Any output sent to stderr in the child process is passed to stderr,
2704 * and not captured in the string.
2707 * The string must be freed by the caller.
2710 Cmd_Exec(const char *cmd, const char **error)
2712 int fds[2]; /* Pipe streams */
2713 int status; /* command exit status */
2714 Buffer *buf; /* buffer to store the result */
2722 * Open a pipe for fetching its output
2724 if (pipe(fds) == -1) {
2725 *error = "Couldn't create pipe for \"%s\"";
2729 /* Set close-on-exec on read side of pipe. */
2730 fcntl(fds[0], F_SETFD, fcntl(fds[0], F_GETFD) | FD_CLOEXEC);
2732 ps.in = STDIN_FILENO;
2734 ps.err = STDERR_FILENO;
2736 ps.merge_errors = 0;
2740 /* Set up arguments for shell */
2741 ps.argv = emalloc(4 * sizeof(char *));
2742 ps.argv[0] = strdup(commandShell->name);
2743 ps.argv[1] = strdup("-c");
2744 ps.argv[2] = strdup(cmd);
2749 * Fork. Warning since we are doing vfork() instead of fork(),
2750 * do not allocate memory in the child process!
2752 if ((ps.child_pid = vfork()) == -1) {
2753 *error = "Couldn't exec \"%s\"";
2755 } else if (ps.child_pid == 0) {
2768 close(fds[1]); /* No need for the writing half of the pipe. */
2771 char result[BUFSIZ];
2773 rcnt = read(fds[0], result, sizeof(result));
2775 Buf_AddBytes(buf, (size_t)rcnt, (Byte *)result);
2776 } while (rcnt > 0 || (rcnt == -1 && errno == EINTR));
2779 *error = "Error reading shell's output for \"%s\"";
2782 * Close the input side of the pipe.
2786 status = ProcWait(&ps);
2788 *error = "\"%s\" returned non-zero status";
2790 Buf_StripNewlines(buf);
2798 * Interrupt the creation of the current target and remove it if
2799 * it ain't precious.
2805 * The target is removed and the process exits. If .INTERRUPT exists,
2806 * its commands are run first WITH INTERRUPTS IGNORED..
2809 CompatInterrupt(int signo, GNode *ENDNode)
2812 sigset_t nmask, omask;
2815 sigemptyset(&nmask);
2816 sigaddset(&nmask, SIGINT);
2817 sigaddset(&nmask, SIGTERM);
2818 sigaddset(&nmask, SIGHUP);
2819 sigaddset(&nmask, SIGQUIT);
2820 sigprocmask(SIG_SETMASK, &nmask, &omask);
2822 /* prevent recursion in evaluation of .INTERRUPT */
2825 if (curTarg != NULL && !Targ_Precious(curTarg)) {
2826 const char *file = Var_Value(TARGET, curTarg);
2828 if (!noExecute && eunlink(file) != -1) {
2829 printf("*** %s removed\n", file);
2834 * Run .INTERRUPT only if hit with interrupt signal
2836 if (signo == SIGINT) {
2837 gn = Targ_FindNode(".INTERRUPT", TARG_NOCREATE);
2839 LST_FOREACH(ln, &gn->commands) {
2840 if (Compat_RunCommand(Lst_Datum(ln), gn, ENDNode))
2846 sigprocmask(SIG_SETMASK, &omask, NULL);
2848 if (signo == SIGQUIT)
2850 signal(signo, SIG_DFL);
2851 kill(getpid(), signo);
2855 * Execute the next command for a target. If the command returns an
2856 * error, the node's made field is set to ERROR and creation stops.
2857 * The node from which the command came is also given. This is used
2858 * to execute the commands in compat mode and when executing commands
2859 * with the '+' flag in non-compat mode. In these modes each command
2860 * line should be executed by its own shell. We do some optimisation here:
2861 * if the shell description defines both a string of meta characters and
2862 * a list of builtins and the command line neither contains a meta character
2863 * nor starts with one of the builtins then we execute the command directly
2864 * without invoking a shell.
2867 * 0 if the command succeeded, 1 if an error occurred.
2870 * The node's 'made' field may be set to ERROR.
2873 Compat_RunCommand(char *cmd, GNode *gn, GNode *ENDNode)
2876 char *cmdStart; /* Start of expanded command */
2877 Boolean silent; /* Don't print command */
2878 Boolean doit; /* Execute even in -n */
2879 Boolean errCheck; /* Check errors */
2880 int reason; /* Reason for child's death */
2881 int status; /* Description of child's death */
2882 LstNode *cmdNode; /* Node where current cmd is located */
2883 char **av; /* Argument vector for thing to exec */
2886 silent = gn->type & OP_SILENT;
2887 errCheck = !(gn->type & OP_IGNORE);
2890 cmdNode = Lst_Member(&gn->commands, cmd);
2891 cmdStart = Buf_Peel(Var_Subst(cmd, gn, FALSE));
2893 if (*cmdStart == '\0') {
2895 Error("%s expands to empty string", cmd);
2900 Lst_Replace(cmdNode, cmdStart);
2902 if ((gn->type & OP_SAVE_CMDS) && (gn != ENDNode)) {
2903 Lst_AtEnd(&ENDNode->commands, cmdStart);
2905 } else if (strcmp(cmdStart, "...") == 0) {
2906 gn->type |= OP_SAVE_CMDS;
2910 while (*cmd == '@' || *cmd == '-' || *cmd == '+') {
2914 silent = DEBUG(LOUD) ? FALSE : TRUE;
2928 while (isspace((unsigned char)*cmd))
2932 * Print the command before echoing if we're not supposed to be quiet
2933 * for this one. We also print the command if -n given, but not if '+'.
2935 if (!silent || (noExecute && !doit)) {
2936 printf("%s\n", cmd);
2941 * If we're not supposed to execute any commands, this is as far as
2944 if (!doit && noExecute) {
2948 if (commandShell->meta != NULL &&
2949 strpbrk(cmd, commandShell->meta) != NULL) {
2951 * We found a "meta" character and need to pass the command
2958 char **sh_builtin = commandShell->builtins.argv + 1;
2961 * Break the command into words to form an argument
2962 * vector we can execute.
2964 brk_string(&aa, cmd, TRUE);
2967 for (p = sh_builtin; *p != 0; p++) {
2968 if (strcmp(av[0], *p) == 0) {
2970 * This command must be passed by the shell
2971 * for other reasons.. or.. possibly not at
2980 ps.in = STDIN_FILENO;
2981 ps.out = STDOUT_FILENO;
2982 ps.err = STDERR_FILENO;
2984 ps.merge_errors = 0;
2990 * We give the shell the -e flag as well as -c if it's
2991 * supposed to exit when it hits an error.
2993 ps.argv = emalloc(4 * sizeof(char *));
2994 ps.argv[0] = strdup(commandShell->path);
2995 ps.argv[1] = strdup(errCheck ? "-ec" : "-c");
2996 ps.argv[2] = strdup(cmd);
3003 ps.errCheck = errCheck;
3006 * Fork and execute the single command. If the fork fails, we abort.
3007 * Warning since we are doing vfork() instead of fork(),
3008 * do not allocate memory in the child process!
3010 if ((ps.child_pid = vfork()) == -1) {
3011 Fatal("Could not fork");
3013 } else if (ps.child_pid == 0) {
3031 * we need to print out the command associated with this
3032 * Gnode in Targ_PrintCmd from Targ_PrintGraph when debugging
3033 * at level g2, in main(), Fatal() and DieHorribly(),
3034 * therefore do not free it when debugging.
3036 if (!DEBUG(GRAPH2)) {
3041 * The child is off and running. Now all we can do is wait...
3043 reason = ProcWait(&ps);
3046 CompatInterrupt(interrupted, ENDNode);
3049 * Decode and report the reason child exited, then
3050 * indicate how we handled it.
3052 if (WIFEXITED(reason)) {
3053 status = WEXITSTATUS(reason);
3057 printf("*** Error code %d", status);
3059 } else if (WIFSTOPPED(reason)) {
3060 status = WSTOPSIG(reason);
3062 status = WTERMSIG(reason);
3063 printf("*** Signal %d", status);
3074 printf(" (continuing)\n");
3079 * Continue executing
3080 * commands for this target.
3081 * If we return 0, this will
3084 printf(" (ignored)\n");
3092 * Make a target, given the parent, to abort if necessary.
3095 * If an error is detected and not being ignored, the process exits.
3098 CompatMake(GNode *gn, GNode *pgn, GNode *ENDNode, Boolean queryFlag)
3102 if (gn->type & OP_USE) {
3103 Make_HandleUse(gn, pgn);
3105 } else if (gn->made == UNMADE) {
3107 * First mark ourselves to be made, then apply whatever
3108 * transformations the suffix module thinks are necessary.
3109 * Once that's done, we can descend and make all our children.
3110 * If any of them has an error but the -k flag was given, our
3111 * 'make' field will be set FALSE again. This is our signal to
3112 * not attempt to do anything but abort our parent as well.
3115 gn->made = BEINGMADE;
3117 LST_FOREACH(ln, &gn->children)
3118 CompatMake(Lst_Datum(ln), gn, ENDNode, queryFlag);
3125 if (Lst_Member(&gn->iParents, pgn) != NULL) {
3126 Var_Set(IMPSRC, Var_Value(TARGET, gn), pgn);
3130 * All the children were made ok. Now cmtime contains the
3131 * modification time of the newest child, we need to find out
3132 * if we exist and when we were modified last. The criteria for
3133 * datedness are defined by the Make_OODate function.
3135 DEBUGF(MAKE, ("Examining %s...", gn->name));
3136 if (!Make_OODate(gn)) {
3137 gn->made = UPTODATE;
3138 DEBUGF(MAKE, ("up-to-date.\n"));
3141 DEBUGF(MAKE, ("out-of-date.\n"));
3145 * If the user is just seeing if something is out-of-date,
3146 * exit now to tell him/her "yes".
3153 * We need to be re-made. We also have to make sure we've got
3154 * a $? variable. To be nice, we also define the $> variable
3155 * using Make_DoAllVar().
3160 * Alter our type to tell if errors should be ignored or things
3161 * should not be printed so Compat_RunCommand knows what to do.
3163 if (Targ_Ignore(gn)) {
3164 gn->type |= OP_IGNORE;
3166 if (Targ_Silent(gn)) {
3167 gn->type |= OP_SILENT;
3170 if (Job_CheckCommands(gn, Fatal)) {
3172 * Our commands are ok, but we still have to worry
3173 * about the -t flag...
3177 LST_FOREACH(ln, &gn->commands) {
3178 if (Compat_RunCommand(Lst_Datum(ln), gn, ENDNode))
3183 Job_Touch(gn, gn->type & OP_SILENT);
3189 if (gn->made != ERROR) {
3191 * If the node was made successfully, mark it so, update
3192 * its modification time and timestamp all its parents.
3193 * Note that for .ZEROTIME targets, the timestamping
3194 * isn't done. This is to keep its state from affecting
3195 * that of its parent.
3200 * We can't re-stat the thing, but we can at least take
3201 * care of rules where a target depends on a source that
3202 * actually creates the target, but only if it has
3210 * mv y.tab.o parse.o
3211 * cmp -s y.tab.h parse.h || mv y.tab.h parse.h
3213 * In this case, if the definitions produced by yacc
3214 * haven't changed from before, parse.h won't have been
3215 * updated and gn->mtime will reflect the current
3216 * modification time for parse.h. This is something of a
3217 * kludge, I admit, but it's a useful one..
3219 * XXX: People like to use a rule like
3223 * To force things that depend on FRC to be made, so we
3224 * have to check for gn->children being empty as well...
3226 if (!Lst_IsEmpty(&gn->commands) ||
3227 Lst_IsEmpty(&gn->children)) {
3232 * This is what Make does and it's actually a good
3233 * thing, as it allows rules like
3235 * cmp -s y.tab.h parse.h || cp y.tab.h parse.h
3237 * to function as intended. Unfortunately, thanks to
3238 * the stateless nature of NFS (and the speed of this
3239 * program), there are times when the modification time
3240 * of a file created on a remote machine will not be
3241 * modified before the stat() implied by the Dir_MTime
3242 * occurs, thus leading us to believe that the file
3243 * is unchanged, wreaking havoc with files that depend
3246 * I have decided it is better to make too much than to
3247 * make too little, so this stuff is commented out
3248 * unless you're sure it's ok.
3251 if (noExecute || Dir_MTime(gn) == 0) {
3254 if (gn->cmtime > gn->mtime)
3255 gn->mtime = gn->cmtime;
3256 DEBUGF(MAKE, ("update time: %s\n",
3257 Targ_FmtTime(gn->mtime)));
3259 if (!(gn->type & OP_EXEC)) {
3260 pgn->childMade = TRUE;
3261 Make_TimeStamp(pgn, gn);
3264 } else if (keepgoing) {
3268 printf("\n\nStop in %s.\n", Var_Value(".CURDIR", gn));
3271 } else if (gn->made == ERROR) {
3273 * Already had an error when making this beastie. Tell the
3278 if (Lst_Member(&gn->iParents, pgn) != NULL) {
3279 Var_Set(IMPSRC, Var_Value(TARGET, gn), pgn);
3283 Error("Graph cycles through %s\n", gn->name);
3288 if ((gn->type & OP_EXEC) == 0) {
3289 pgn->childMade = TRUE;
3290 Make_TimeStamp(pgn, gn);
3294 if ((gn->type & OP_EXEC) == 0) {
3295 Make_TimeStamp(pgn, gn);
3308 * Start making again, given a list of target nodes.
3317 Compat_Run(Lst *targs, Boolean queryFlag)
3319 GNode *gn = NULL; /* Current root target */
3320 int error_cnt; /* Number of targets not remade due to errors */
3324 Proc_Setupsignals(TRUE);
3326 ENDNode = Targ_FindNode(".END", TARG_CREATE);
3328 * If the user has defined a .BEGIN target, execute the commands
3332 gn = Targ_FindNode(".BEGIN", TARG_NOCREATE);
3334 LST_FOREACH(ln, &gn->commands) {
3335 if (Compat_RunCommand(Lst_Datum(ln), gn, ENDNode))
3338 if (gn->made == ERROR) {
3339 printf("\n\nStop.\n");
3346 * For each entry in the list of targets to create, call CompatMake on
3347 * it to create the thing. CompatMake will leave the 'made' field of gn
3348 * in one of several states:
3349 * UPTODATE gn was already up-to-date
3350 * MADE gn was recreated successfully
3351 * ERROR An error occurred while gn was being created
3352 * ABORTED gn was not remade because one of its inferiors
3353 * could not be made due to errors.
3356 while (!Lst_IsEmpty(targs)) {
3357 gn = Lst_DeQueue(targs);
3358 CompatMake(gn, gn, ENDNode, queryFlag);
3360 if (gn->made == UPTODATE) {
3361 printf("`%s' is up to date.\n", gn->name);
3362 } else if (gn->made == ABORTED) {
3363 printf("`%s' not remade because of errors.\n",
3370 * If the user has defined a .END target, run its commands.
3372 if (error_cnt == 0) {
3373 LST_FOREACH(ln, &ENDNode->commands) {
3374 if (Compat_RunCommand(Lst_Datum(ln), gn, ENDNode))
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