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
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29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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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 1.112 2005/05/23 20:04:04 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 * Turn off ENV to make ksh happier.
557 * Signal handler - set a variable and defer handling to the main code.
560 catchsignal(int signo)
566 * Catch the four signals that POSIX specifies if they aren't ignored.
569 Proc_Setupsignals(Boolean compat)
573 sigemptyset(&sa.sa_mask);
575 sa.sa_handler = catchsignal;
577 if (signal(SIGHUP, SIG_IGN) != SIG_IGN) {
578 sigaction(SIGHUP, &sa, NULL);
580 if (signal(SIGINT, SIG_IGN) != SIG_IGN) {
581 sigaction(SIGINT, &sa, NULL);
583 if (signal(SIGQUIT, SIG_IGN) != SIG_IGN) {
584 sigaction(SIGQUIT, &sa, NULL);
586 if (signal(SIGTERM, SIG_IGN) != SIG_IGN) {
587 sigaction(SIGTERM, &sa, NULL);
595 * There are additional signals that need to be caught and
596 * passed if either the export system wants to be told
597 * directly of signals or if we're giving each job its own
598 * process group (since then it won't get signals from the
599 * terminal driver as we own the terminal)
602 if (signal(SIGTSTP, SIG_IGN) != SIG_IGN) {
603 sigaction(SIGTSTP, &sa, NULL);
605 if (signal(SIGTTOU, SIG_IGN) != SIG_IGN) {
606 sigaction(SIGTTOU, &sa, NULL);
608 if (signal(SIGTTIN, SIG_IGN) != SIG_IGN) {
609 sigaction(SIGTTIN, &sa, NULL);
611 if (signal(SIGWINCH, SIG_IGN) != SIG_IGN) {
612 sigaction(SIGWINCH, &sa, NULL);
618 * Wait for child process to terminate.
621 ProcWait(ProcStuff *ps)
627 * Wait for the process to exit.
630 pid = waitpid(ps->child_pid, &status, 0);
631 if (pid == -1 && errno != EINTR) {
632 Fatal("error in wait: %d", pid);
635 if (pid == ps->child_pid) {
648 * Pass a signal on to all local jobs if
649 * USE_PGRP is defined, then die ourselves.
652 * We die by the same signal.
655 JobPassSig(int signo)
658 sigset_t nmask, omask;
659 struct sigaction act;
662 sigaddset(&nmask, signo);
663 sigprocmask(SIG_SETMASK, &nmask, &omask);
665 DEBUGF(JOB, ("JobPassSig(%d) called.\n", signo));
666 TAILQ_FOREACH(job, &jobs, link) {
667 DEBUGF(JOB, ("JobPassSig passing signal %d to child %jd.\n",
668 signo, (intmax_t)job->pid));
669 KILL(job->pid, signo);
673 * Deal with proper cleanup based on the signal received. We only run
674 * the .INTERRUPT target if the signal was in fact an interrupt.
675 * The other three termination signals are more of a "get out *now*"
678 if (signo == SIGINT) {
679 JobInterrupt(TRUE, signo);
680 } else if (signo == SIGHUP || signo == SIGTERM || signo == SIGQUIT) {
681 JobInterrupt(FALSE, signo);
685 * Leave gracefully if SIGQUIT, rather than core dumping.
687 if (signo == SIGQUIT) {
692 * Send ourselves the signal now we've given the message to everyone
693 * else. Note we block everything else possible while we're getting
694 * the signal. This ensures that all our jobs get continued when we
695 * wake up before we take any other signal.
696 * XXX this comment seems wrong.
698 act.sa_handler = SIG_DFL;
699 sigemptyset(&act.sa_mask);
701 sigaction(signo, &act, NULL);
703 DEBUGF(JOB, ("JobPassSig passing signal to self, mask = %x.\n",
704 ~0 & ~(1 << (signo - 1))));
706 signal(signo, SIG_DFL);
707 KILL(getpid(), signo);
710 TAILQ_FOREACH(job, &jobs, link) {
711 DEBUGF(JOB, ("JobPassSig passing signal %d to child %jd.\n",
712 signo, (intmax_t)job->pid));
713 KILL(job->pid, signo);
716 sigprocmask(SIG_SETMASK, &omask, NULL);
717 sigprocmask(SIG_SETMASK, &omask, NULL);
718 act.sa_handler = JobPassSig;
719 sigaction(signo, &act, NULL);
724 * Put out another command for the given job. If the command starts
725 * with an @ or a - we process it specially. In the former case,
726 * so long as the -s and -n flags weren't given to make, we stick
727 * a shell-specific echoOff command in the script. In the latter,
728 * we ignore errors for the entire job, unless the shell has error
730 * If the command is just "..." we take all future commands for this
731 * job to be commands to be executed once the entire graph has been
732 * made and return non-zero to signal that the end of the commands
733 * was reached. These commands are later attached to the postCommands
734 * node and executed by Job_Finish when all things are done.
735 * This function is called from JobStart via LST_FOREACH.
738 * Always 0, unless the command was "..."
741 * If the command begins with a '-' and the shell has no error control,
742 * the JOB_IGNERR flag is set in the job descriptor.
743 * If the command is "..." and we're not ignoring such things,
744 * tailCmds is set to the successor node of the cmd.
745 * numCommands is incremented if the command is actually printed.
748 JobPrintCommand(char *cmd, Job *job)
750 Boolean noSpecials; /* true if we shouldn't worry about
751 * inserting special commands into
752 * the input stream. */
753 Boolean shutUp = FALSE; /* true if we put a no echo command
754 * into the command file */
755 Boolean errOff = FALSE; /* true if we turned error checking
756 * off before printing the command
757 * and need to turn it back on */
758 const char *cmdTemplate;/* Template to use when printing the command */
759 char *cmdStart; /* Start of expanded command */
760 LstNode *cmdNode; /* Node for replacing the command */
762 noSpecials = (noExecute && !(job->node->type & OP_MAKE));
764 if (strcmp(cmd, "...") == 0) {
765 job->node->type |= OP_SAVE_CMDS;
766 if ((job->flags & JOB_IGNDOTS) == 0) {
768 Lst_Succ(Lst_Member(&job->node->commands, cmd));
774 #define DBPRINTF(fmt, arg) \
775 DEBUGF(JOB, (fmt, arg)); \
776 fprintf(job->cmdFILE, fmt, arg); \
777 fflush(job->cmdFILE);
782 * For debugging, we replace each command with the result of expanding
783 * the variables in the command.
785 cmdNode = Lst_Member(&job->node->commands, cmd);
787 cmd = Buf_Peel(Var_Subst(cmd, job->node, FALSE));
790 Lst_Replace(cmdNode, cmdStart);
792 cmdTemplate = "%s\n";
795 * Check for leading @', -' or +'s to control echoing, error checking,
796 * and execution on -n.
798 while (*cmd == '@' || *cmd == '-' || *cmd == '+') {
802 shutUp = DEBUG(LOUD) ? FALSE : TRUE;
812 * We're not actually exececuting anything...
813 * but this one needs to be - use compat mode
816 Compat_RunCommand(cmd, job->node, NULL);
824 while (isspace((unsigned char)*cmd))
828 if (!(job->flags & JOB_SILENT) && !noSpecials &&
829 commandShell->hasEchoCtl) {
830 DBPRINTF("%s\n", commandShell->echoOff);
837 if (!(job->flags & JOB_IGNERR) && !noSpecials) {
838 if (commandShell->hasErrCtl) {
840 * We don't want the error-control commands
841 * showing up either, so we turn off echoing
842 * while executing them. We could put another
843 * field in the shell structure to tell
844 * JobDoOutput to look for this string too,
845 * but why make it any more complex than
848 if (!(job->flags & JOB_SILENT) && !shutUp &&
849 commandShell->hasEchoCtl) {
850 DBPRINTF("%s\n", commandShell->echoOff);
851 DBPRINTF("%s\n", commandShell->ignErr);
852 DBPRINTF("%s\n", commandShell->echoOn);
854 DBPRINTF("%s\n", commandShell->ignErr);
856 } else if (commandShell->ignErr &&
857 *commandShell->ignErr != '\0') {
859 * The shell has no error control, so we need to
860 * be weird to get it to ignore any errors from
861 * the command. If echoing is turned on, we turn
862 * it off and use the errCheck template to echo
863 * the command. Leave echoing off so the user
864 * doesn't see the weirdness we go through to
865 * ignore errors. Set cmdTemplate to use the
866 * weirdness instead of the simple "%s\n"
869 if (!(job->flags & JOB_SILENT) && !shutUp &&
870 commandShell->hasEchoCtl) {
871 DBPRINTF("%s\n", commandShell->echoOff);
872 DBPRINTF(commandShell->errCheck, cmd);
875 cmdTemplate = commandShell->ignErr;
877 * The error ignoration (hee hee) is already
878 * taken care of by the ignErr template, so
879 * pretend error checking is still on.
890 DBPRINTF(cmdTemplate, cmd);
894 * If echoing is already off, there's no point in issuing the
895 * echoOff command. Otherwise we issue it and pretend it was on
896 * for the whole command...
898 if (!shutUp && !(job->flags & JOB_SILENT) &&
899 commandShell->hasEchoCtl) {
900 DBPRINTF("%s\n", commandShell->echoOff);
903 DBPRINTF("%s\n", commandShell->errCheck);
906 DBPRINTF("%s\n", commandShell->echoOn);
913 * Called to close both input and output pipes when a job is finished.
916 * The file descriptors associated with the job are closed.
923 #if !defined(USE_KQUEUE)
924 FD_CLR(job->inPipe, &outputs);
926 if (job->outPipe != job->inPipe) {
929 JobDoOutput(job, TRUE);
933 JobDoOutput(job, TRUE);
939 * Do final processing for the given job including updating
940 * parents and starting new jobs as available/necessary. Note
941 * that we pay no attention to the JOB_IGNERR flag here.
942 * This is because when we're called because of a noexecute flag
943 * or something, jstat.w_status is 0 and when called from
944 * Job_CatchChildren, the status is zeroed if it s/b ignored.
947 * Some nodes may be put on the toBeMade queue.
948 * Final commands for the job are placed on postCommands.
950 * If we got an error and are aborting (aborting == ABORT_ERROR) and
951 * the job list is now empty, we are done for the day.
952 * If we recognized an error (errors !=0), we set the aborting flag
953 * to ABORT_ERROR so no more jobs will be started.
956 JobFinish(Job *job, int *status)
961 if (WIFEXITED(*status)) {
962 int job_status = WEXITSTATUS(*status);
966 * Deal with ignored errors in -B mode. We need to
967 * print a message telling of the ignored error as
968 * well as setting status.w_status to 0 so the next
969 * command gets run. To do this, we set done to be
970 * TRUE if in -B mode and the job exited non-zero.
972 if (job_status == 0) {
975 if (job->flags & JOB_IGNERR) {
979 * If it exited non-zero and either we're
980 * doing things our way or we're not ignoring
981 * errors, the job is finished. Similarly, if
982 * the shell died because of a signal the job
983 * is also finished. In these cases, finish
984 * out the job's output before printing the
988 if (job->cmdFILE != NULL &&
989 job->cmdFILE != stdout) {
990 fclose(job->cmdFILE);
995 } else if (WIFSIGNALED(*status)) {
996 if (WTERMSIG(*status) == SIGCONT) {
998 * No need to close things down or anything.
1003 * If it exited non-zero and either we're
1004 * doing things our way or we're not ignoring
1005 * errors, the job is finished. Similarly, if
1006 * the shell died because of a signal the job
1007 * is also finished. In these cases, finish
1008 * out the job's output before printing the
1012 if (job->cmdFILE != NULL &&
1013 job->cmdFILE != stdout) {
1014 fclose(job->cmdFILE);
1020 * No need to close things down or anything.
1025 if (WIFEXITED(*status)) {
1026 if (done || DEBUG(JOB)) {
1031 (job->flags & JOB_IGNERR)) {
1033 * If output is going to a file and this job
1034 * is ignoring errors, arrange to have the
1035 * exit status sent to the output file as
1038 out = fdopen(job->outFd, "w");
1040 Punt("Cannot fdopen");
1045 DEBUGF(JOB, ("Process %jd exited.\n",
1046 (intmax_t)job->pid));
1048 if (WEXITSTATUS(*status) == 0) {
1050 if (usePipes && job->node != lastNode) {
1051 MESSAGE(out, job->node);
1052 lastNode = job->node;
1055 "*** Completed successfully\n");
1058 if (usePipes && job->node != lastNode) {
1059 MESSAGE(out, job->node);
1060 lastNode = job->node;
1062 fprintf(out, "*** Error code %d%s\n",
1063 WEXITSTATUS(*status),
1064 (job->flags & JOB_IGNERR) ?
1067 if (job->flags & JOB_IGNERR) {
1074 } else if (WIFSIGNALED(*status)) {
1075 if (done || DEBUG(JOB) || (WTERMSIG(*status) == SIGCONT)) {
1080 (job->flags & JOB_IGNERR)) {
1082 * If output is going to a file and this job
1083 * is ignoring errors, arrange to have the
1084 * exit status sent to the output file as
1087 out = fdopen(job->outFd, "w");
1089 Punt("Cannot fdopen");
1094 if (WTERMSIG(*status) == SIGCONT) {
1096 * If the beastie has continued, shift the
1097 * Job from the stopped list to the running
1098 * one (or re-stop it if concurrency is
1099 * exceeded) and go and get another child.
1101 if (job->flags & (JOB_RESUME | JOB_RESTART)) {
1102 if (usePipes && job->node != lastNode) {
1103 MESSAGE(out, job->node);
1104 lastNode = job->node;
1106 fprintf(out, "*** Continued\n");
1108 if (!(job->flags & JOB_CONTINUING)) {
1109 DEBUGF(JOB, ("Warning: process %jd was not "
1110 "continuing.\n", (intmax_t) job->pid));
1113 * We don't really want to restart a
1114 * job from scratch just because it
1115 * continued, especially not without
1116 * killing the continuing process!
1117 * That's why this is ifdef'ed out.
1123 job->flags &= ~JOB_CONTINUING;
1124 TAILQ_INSERT_TAIL(&jobs, job, link);
1126 DEBUGF(JOB, ("Process %jd is continuing locally.\n",
1127 (intmax_t) job->pid));
1128 if (nJobs == maxJobs) {
1130 DEBUGF(JOB, ("Job queue is full.\n"));
1136 if (usePipes && job->node != lastNode) {
1137 MESSAGE(out, job->node);
1138 lastNode = job->node;
1141 "*** Signal %d\n", WTERMSIG(*status));
1149 if (compatMake && !usePipes && (job->flags & JOB_IGNERR)) {
1151 * If output is going to a file and this job
1152 * is ignoring errors, arrange to have the
1153 * exit status sent to the output file as
1156 out = fdopen(job->outFd, "w");
1158 Punt("Cannot fdopen");
1163 DEBUGF(JOB, ("Process %jd stopped.\n", (intmax_t) job->pid));
1164 if (usePipes && job->node != lastNode) {
1165 MESSAGE(out, job->node);
1166 lastNode = job->node;
1168 fprintf(out, "*** Stopped -- signal %d\n", WSTOPSIG(*status));
1169 job->flags |= JOB_RESUME;
1170 TAILQ_INSERT_TAIL(&stoppedJobs, job, link);
1176 * Now handle the -B-mode stuff. If the beast still isn't finished,
1177 * try and restart the job on the next command. If JobStart says it's
1178 * ok, it's ok. If there's an error, this puppy is done.
1180 if (compatMake && WIFEXITED(*status) &&
1181 Lst_Succ(job->node->compat_command) != NULL) {
1182 switch (JobStart(job->node, job->flags & JOB_IGNDOTS, job)) {
1188 W_SETEXITSTATUS(status, 1);
1192 * If we got back a JOB_FINISHED code, JobStart has
1193 * already called Make_Update and freed the job
1194 * descriptor. We set done to false here to avoid fake
1195 * cycles and double frees. JobStart needs to do the
1196 * update so we can proceed up the graph when given
1208 if (done && aborting != ABORT_ERROR &&
1209 aborting != ABORT_INTERRUPT && *status == 0) {
1211 * As long as we aren't aborting and the job didn't return a
1212 * non-zero status that we shouldn't ignore, we call
1213 * Make_Update to update the parents. In addition, any saved
1214 * commands for the node are placed on the .END target.
1216 for (ln = job->tailCmds; ln != NULL; ln = LST_NEXT(ln)) {
1217 Lst_AtEnd(&postCommands->commands,
1219 Var_Subst(Lst_Datum(ln), job->node, FALSE)));
1222 job->node->made = MADE;
1223 Make_Update(job->node);
1226 } else if (*status != 0) {
1234 * Set aborting if any error.
1236 if (errors && !keepgoing && aborting != ABORT_INTERRUPT) {
1238 * If we found any errors in this batch of children and the -k
1239 * flag wasn't given, we set the aborting flag so no more jobs
1242 aborting = ABORT_ERROR;
1245 if (aborting == ABORT_ERROR && Job_Empty()) {
1247 * If we are aborting and the job table is now empty, we finish.
1255 * Touch the given target. Called by JobStart when the -t flag was
1256 * given. Prints messages unless told to be silent.
1259 * The data modification of the file is changed. In addition, if the
1260 * file did not exist, it is created.
1263 Job_Touch(GNode *gn, Boolean silent)
1265 int streamID; /* ID of stream opened to do the touch */
1266 struct utimbuf times; /* Times for utime() call */
1268 if (gn->type & (OP_JOIN | OP_USE | OP_EXEC | OP_OPTIONAL)) {
1270 * .JOIN, .USE, .ZEROTIME and .OPTIONAL targets are "virtual"
1271 * targets and, as such, shouldn't really be created.
1277 fprintf(stdout, "touch %s\n", gn->name);
1285 if (gn->type & OP_ARCHV) {
1287 } else if (gn->type & OP_LIB) {
1290 char *file = gn->path ? gn->path : gn->name;
1292 times.actime = times.modtime = now;
1293 if (utime(file, ×) < 0) {
1294 streamID = open(file, O_RDWR | O_CREAT, 0666);
1296 if (streamID >= 0) {
1300 * Read and write a byte to the file to change
1301 * the modification time, then close the file.
1303 if (read(streamID, &c, 1) == 1) {
1304 lseek(streamID, (off_t)0, SEEK_SET);
1305 write(streamID, &c, 1);
1310 fprintf(stdout, "*** couldn't touch %s: %s",
1311 file, strerror(errno));
1320 * Make sure the given node has all the commands it needs.
1323 * TRUE if the commands list is/was ok.
1326 * The node will have commands from the .DEFAULT rule added to it
1330 Job_CheckCommands(GNode *gn, void (*abortProc)(const char *, ...))
1333 if (OP_NOP(gn->type) && Lst_IsEmpty(&gn->commands) &&
1334 (gn->type & OP_LIB) == 0) {
1336 * No commands. Look for .DEFAULT rule from which we might infer
1339 if (DEFAULT != NULL && !Lst_IsEmpty(&DEFAULT->commands)) {
1341 * Make only looks for a .DEFAULT if the node was
1342 * never the target of an operator, so that's what we
1343 * do too. If a .DEFAULT was given, we substitute its
1344 * commands for gn's commands and set the IMPSRC
1345 * variable to be the target's name The DEFAULT node
1346 * acts like a transformation rule, in that gn also
1347 * inherits any attributes or sources attached to
1350 Make_HandleUse(DEFAULT, gn);
1351 Var_Set(IMPSRC, Var_Value(TARGET, gn), gn);
1353 } else if (Dir_MTime(gn) == 0) {
1355 * The node wasn't the target of an operator we have
1356 * no .DEFAULT rule to go on and the target doesn't
1357 * already exist. There's nothing more we can do for
1358 * this branch. If the -k flag wasn't given, we stop
1359 * in our tracks, otherwise we just don't update
1360 * this node's parents so they never get examined.
1362 static const char msg[] =
1363 "make: don't know how to make";
1365 if (gn->type & OP_OPTIONAL) {
1366 fprintf(stdout, "%s %s(ignored)\n",
1369 } else if (keepgoing) {
1370 fprintf(stdout, "%s %s(continuing)\n",
1376 if (strcmp(gn->name,"love") == 0)
1377 (*abortProc)("Not war.");
1380 (*abortProc)("%s %s. Stop",
1391 * Execute the shell for the given job. Called from JobStart and
1395 * A shell is executed, outputs is altered and the Job structure added
1399 JobExec(Job *job, char **argv)
1406 DEBUGF(JOB, ("Running %s\n", job->node->name));
1407 DEBUGF(JOB, ("\tCommand: "));
1408 for (i = 0; argv[i] != NULL; i++) {
1409 DEBUGF(JOB, ("%s ", argv[i]));
1411 DEBUGF(JOB, ("\n"));
1415 * Some jobs produce no output and it's disconcerting to have
1416 * no feedback of their running (since they produce no output, the
1417 * banner with their name in it never appears). This is an attempt to
1418 * provide that feedback, even if nothing follows it.
1420 if (lastNode != job->node && (job->flags & JOB_FIRST) &&
1421 !(job->flags & JOB_SILENT)) {
1422 MESSAGE(stdout, job->node);
1423 lastNode = job->node;
1426 ps.in = FILENO(job->cmdFILE);
1429 * Set up the child's output to be routed through the
1430 * pipe we've created for it.
1432 ps.out = job->outPipe;
1435 * We're capturing output in a file, so we duplicate
1436 * the descriptor to the temporary file into the
1439 ps.out = job->outFd;
1441 ps.err = STDERR_FILENO;
1443 ps.merge_errors = 1;
1451 * Fork. Warning since we are doing vfork() instead of fork(),
1452 * do not allocate memory in the child process!
1454 if ((ps.child_pid = vfork()) == -1) {
1455 Punt("Cannot fork");
1457 } else if (ps.child_pid == 0) {
1471 job->pid = ps.child_pid;
1473 if (usePipes && (job->flags & JOB_FIRST)) {
1475 * The first time a job is run for a node, we set the
1476 * current position in the buffer to the beginning and
1477 * mark another stream to watch in the outputs mask.
1480 struct kevent kev[2];
1484 #if defined(USE_KQUEUE)
1485 EV_SET(&kev[0], job->inPipe, EVFILT_READ, EV_ADD, 0, 0, job);
1486 EV_SET(&kev[1], job->pid, EVFILT_PROC,
1487 EV_ADD | EV_ONESHOT, NOTE_EXIT, 0, NULL);
1488 if (kevent(kqfd, kev, 2, NULL, 0, NULL) != 0) {
1490 * kevent() will fail if the job is already
1493 if (errno != EINTR && errno != EBADF && errno != ESRCH)
1494 Punt("kevent: %s", strerror(errno));
1497 FD_SET(job->inPipe, &outputs);
1498 #endif /* USE_KQUEUE */
1501 if (job->cmdFILE != NULL && job->cmdFILE != stdout) {
1502 fclose(job->cmdFILE);
1503 job->cmdFILE = NULL;
1507 * Now the job is actually running, add it to the table.
1510 TAILQ_INSERT_TAIL(&jobs, job, link);
1511 if (nJobs == maxJobs) {
1519 * Create the argv needed to execute the shell for a given job.
1522 JobMakeArgv(Job *job, char **argv)
1525 static char args[10]; /* For merged arguments */
1527 argv[0] = commandShell->name;
1530 if ((commandShell->exit && *commandShell->exit != '-') ||
1531 (commandShell->echo && *commandShell->echo != '-')) {
1533 * At least one of the flags doesn't have a minus before it, so
1534 * merge them together. Have to do this because the *(&(@*#*&#$#
1535 * Bourne shell thinks its second argument is a file to source.
1536 * Grrrr. Note the ten-character limitation on the combined
1539 sprintf(args, "-%s%s", (job->flags & JOB_IGNERR) ? "" :
1540 commandShell->exit ? commandShell->exit : "",
1541 (job->flags & JOB_SILENT) ? "" :
1542 commandShell->echo ? commandShell->echo : "");
1549 if (!(job->flags & JOB_IGNERR) && commandShell->exit) {
1550 argv[argc] = commandShell->exit;
1553 if (!(job->flags & JOB_SILENT) && commandShell->echo) {
1554 argv[argc] = commandShell->echo;
1563 * Restart a job that stopped for some reason. The job must be neither
1564 * on the jobs nor on the stoppedJobs list.
1567 * jobFull will be set if the job couldn't be run.
1570 JobRestart(Job *job)
1573 if (job->flags & JOB_RESTART) {
1575 * Set up the control arguments to the shell. This is based on
1576 * the flags set earlier for this job. If the JOB_IGNERR flag
1577 * is clear, the 'exit' flag of the commandShell is used to
1578 * cause it to exit upon receiving an error. If the JOB_SILENT
1579 * flag is clear, the 'echo' flag of the commandShell is used
1580 * to get it to start echoing as soon as it starts
1581 * processing commands.
1585 JobMakeArgv(job, argv);
1587 DEBUGF(JOB, ("Restarting %s...", job->node->name));
1588 if (nJobs >= maxJobs && !(job->flags & JOB_SPECIAL)) {
1590 * Not allowed to run -- put it back on the hold
1591 * queue and mark the table full
1593 DEBUGF(JOB, ("holding\n"));
1594 TAILQ_INSERT_HEAD(&stoppedJobs, job, link);
1596 DEBUGF(JOB, ("Job queue is full.\n"));
1600 * Job may be run locally.
1602 DEBUGF(JOB, ("running locally\n"));
1608 * The job has stopped and needs to be restarted.
1609 * Why it stopped, we don't know...
1611 DEBUGF(JOB, ("Resuming %s...", job->node->name));
1612 if ((nJobs < maxJobs || ((job->flags & JOB_SPECIAL) &&
1613 maxJobs == 0)) && nJobs != maxJobs) {
1615 * If we haven't reached the concurrency limit already
1616 * (or the job must be run and maxJobs is 0), it's ok
1622 error = (KILL(job->pid, SIGCONT) != 0);
1626 * Make sure the user knows we've continued
1627 * the beast and actually put the thing in the
1630 job->flags |= JOB_CONTINUING;
1632 W_SETTERMSIG(&status, SIGCONT);
1633 JobFinish(job, &status);
1635 job->flags &= ~(JOB_RESUME|JOB_CONTINUING);
1636 DEBUGF(JOB, ("done\n"));
1638 Error("couldn't resume %s: %s",
1639 job->node->name, strerror(errno));
1641 W_SETEXITSTATUS(&status, 1);
1642 JobFinish(job, &status);
1646 * Job cannot be restarted. Mark the table as full and
1647 * place the job back on the list of stopped jobs.
1649 DEBUGF(JOB, ("table full\n"));
1650 TAILQ_INSERT_HEAD(&stoppedJobs, job, link);
1652 DEBUGF(JOB, ("Job queue is full.\n"));
1659 * Start a target-creation process going for the target described
1660 * by the graph node gn.
1663 * JOB_ERROR if there was an error in the commands, JOB_FINISHED
1664 * if there isn't actually anything left to do for the job and
1665 * JOB_RUNNING if the job has been started.
1668 * A new Job node is created and added to the list of running
1669 * jobs. PMake is forked and a child shell created.
1672 JobStart(GNode *gn, int flags, Job *previous)
1674 Job *job; /* new job descriptor */
1675 char *argv[4]; /* Argument vector to shell */
1676 Boolean cmdsOK; /* true if the nodes commands were all right */
1677 Boolean noExec; /* Set true if we decide not to run the job */
1678 int tfd; /* File descriptor for temp file */
1680 char tfile[sizeof(TMPPAT)];
1683 JobPassSig(interrupted);
1686 if (previous != NULL) {
1687 previous->flags &= ~(JOB_FIRST | JOB_IGNERR | JOB_SILENT);
1690 job = emalloc(sizeof(Job));
1695 job->tailCmds = NULL;
1698 * Set the initial value of the flags for this job based on the global
1699 * ones and the node's attributes... Any flags supplied by the caller
1700 * are also added to the field.
1703 if (Targ_Ignore(gn)) {
1704 job->flags |= JOB_IGNERR;
1706 if (Targ_Silent(gn)) {
1707 job->flags |= JOB_SILENT;
1709 job->flags |= flags;
1712 * Check the commands now so any attributes from .DEFAULT have a chance
1713 * to migrate to the node.
1715 if (!compatMake && (job->flags & JOB_FIRST)) {
1716 cmdsOK = Job_CheckCommands(gn, Error);
1722 * If the -n flag wasn't given, we open up OUR (not the child's)
1723 * temporary file to stuff commands in it. The thing is rd/wr so we
1724 * don't need to reopen it to feed it to the shell. If the -n flag
1725 * *was* given, we just set the file to be stdout. Cute, huh?
1727 if ((gn->type & OP_MAKE) || (!noExecute && !touchFlag)) {
1729 * We're serious here, but if the commands were bogus, we're
1736 strcpy(tfile, TMPPAT);
1737 if ((tfd = mkstemp(tfile)) == -1)
1738 Punt("Cannot create temp file: %s", strerror(errno));
1739 job->cmdFILE = fdopen(tfd, "w+");
1741 if (job->cmdFILE == NULL) {
1743 Punt("Could not open %s", tfile);
1745 fcntl(FILENO(job->cmdFILE), F_SETFD, 1);
1747 * Send the commands to the command file, flush all its
1748 * buffers then rewind and remove the thing.
1753 * Used to be backwards; replace when start doing multiple
1754 * commands per shell.
1758 * Be compatible: If this is the first time for this
1759 * node, verify its commands are ok and open the
1760 * commands list for sequential access by later
1761 * invocations of JobStart. Once that is done, we take
1762 * the next command off the list and print it to the
1763 * command file. If the command was an ellipsis, note
1764 * that there's nothing more to execute.
1766 if (job->flags & JOB_FIRST)
1767 gn->compat_command = Lst_First(&gn->commands);
1769 gn->compat_command =
1770 Lst_Succ(gn->compat_command);
1772 if (gn->compat_command == NULL ||
1773 JobPrintCommand(Lst_Datum(gn->compat_command), job))
1776 if (noExec && !(job->flags & JOB_FIRST)) {
1778 * If we're not going to execute anything, the
1779 * job is done and we need to close down the
1780 * various file descriptors we've opened for
1781 * output, then call JobDoOutput to catch the
1782 * final characters or send the file to the
1783 * screen... Note that the i/o streams are only
1784 * open if this isn't the first job. Note also
1785 * that this could not be done in
1786 * Job_CatchChildren b/c it wasn't clear if
1787 * there were more commands to execute or not...
1793 * We can do all the commands at once. hooray for sanity
1796 LST_FOREACH(ln, &gn->commands) {
1797 if (JobPrintCommand(Lst_Datum(ln), job))
1802 * If we didn't print out any commands to the shell
1803 * script, there's not much point in executing the
1806 if (numCommands == 0) {
1811 } else if (noExecute) {
1813 * Not executing anything -- just print all the commands to
1814 * stdout in one fell swoop. This will still set up
1815 * job->tailCmds correctly.
1817 if (lastNode != gn) {
1818 MESSAGE(stdout, gn);
1821 job->cmdFILE = stdout;
1824 * Only print the commands if they're ok, but don't die if
1825 * they're not -- just let the user know they're bad and keep
1826 * going. It doesn't do any harm in this case and may do
1830 LST_FOREACH(ln, &gn->commands) {
1831 if (JobPrintCommand(Lst_Datum(ln), job))
1836 * Don't execute the shell, thank you.
1842 * Just touch the target and note that no shell should be
1843 * executed. Set cmdFILE to stdout to make life easier. Check
1844 * the commands, too, but don't die if they're no good -- it
1845 * does no harm to keep working up the graph.
1847 job->cmdFILE = stdout;
1848 Job_Touch(gn, job->flags & JOB_SILENT);
1853 * If we're not supposed to execute a shell, don't.
1857 * Unlink and close the command file if we opened one
1859 if (job->cmdFILE != stdout) {
1860 if (job->cmdFILE != NULL)
1861 fclose(job->cmdFILE);
1867 * We only want to work our way up the graph if we aren't here
1868 * because the commands for the job were no good.
1871 if (aborting == 0) {
1872 for (ln = job->tailCmds; ln != NULL;
1873 ln = LST_NEXT(ln)) {
1874 Lst_AtEnd(&postCommands->commands,
1875 Buf_Peel(Var_Subst(Lst_Datum(ln),
1876 job->node, FALSE)));
1878 job->node->made = MADE;
1879 Make_Update(job->node);
1882 return(JOB_FINISHED);
1888 fflush(job->cmdFILE);
1892 * Set up the control arguments to the shell. This is based on the flags
1893 * set earlier for this job.
1895 JobMakeArgv(job, argv);
1898 * If we're using pipes to catch output, create the pipe by which we'll
1899 * get the shell's output. If we're using files, print out that we're
1900 * starting a job and then set up its temporary-file name.
1902 if (!compatMake || (job->flags & JOB_FIRST)) {
1907 Punt("Cannot create pipe: %s", strerror(errno));
1908 job->inPipe = fd[0];
1909 job->outPipe = fd[1];
1910 fcntl(job->inPipe, F_SETFD, 1);
1911 fcntl(job->outPipe, F_SETFD, 1);
1913 fprintf(stdout, "Remaking `%s'\n", gn->name);
1915 strcpy(job->outFile, TMPPAT);
1916 if ((job->outFd = mkstemp(job->outFile)) == -1)
1917 Punt("cannot create temp file: %s",
1919 fcntl(job->outFd, F_SETFD, 1);
1923 if (nJobs >= maxJobs && !(job->flags & JOB_SPECIAL) && maxJobs != 0) {
1925 * We've hit the limit of concurrency, so put the job on hold
1926 * until some other job finishes. Note that the special jobs
1927 * (.BEGIN, .INTERRUPT and .END) may be run even when the
1928 * limit has been reached (e.g. when maxJobs == 0).
1932 DEBUGF(JOB, ("Can only run job locally.\n"));
1933 job->flags |= JOB_RESTART;
1934 TAILQ_INSERT_TAIL(&stoppedJobs, job, link);
1936 if (nJobs >= maxJobs) {
1938 * If we're running this job as a special case
1939 * (see above), at least say the table is full.
1942 DEBUGF(JOB, ("Local job queue is full.\n"));
1946 return (JOB_RUNNING);
1950 JobOutput(Job *job, char *cp, char *endp, int msg)
1954 if (commandShell->noPrint) {
1955 ecp = strstr(cp, commandShell->noPrint);
1956 while (ecp != NULL) {
1959 if (msg && job->node != lastNode) {
1960 MESSAGE(stdout, job->node);
1961 lastNode = job->node;
1964 * The only way there wouldn't be a newline
1965 * after this line is if it were the last in
1966 * the buffer. However, since the non-printable
1967 * comes after it, there must be a newline, so
1968 * we don't print one.
1970 fprintf(stdout, "%s", cp);
1973 cp = ecp + strlen(commandShell->noPrint);
1976 * Still more to print, look again after
1977 * skipping the whitespace following the
1978 * non-printable command....
1981 while (*cp == ' ' || *cp == '\t' ||
1985 ecp = strstr(cp, commandShell->noPrint);
1996 * This function is called at different times depending on
1997 * whether the user has specified that output is to be collected
1998 * via pipes or temporary files. In the former case, we are called
1999 * whenever there is something to read on the pipe. We collect more
2000 * output from the given job and store it in the job's outBuf. If
2001 * this makes up a line, we print it tagged by the job's identifier,
2003 * If output has been collected in a temporary file, we open the
2004 * file and read it line by line, transfering it to our own
2005 * output channel until the file is empty. At which point we
2006 * remove the temporary file.
2007 * In both cases, however, we keep our figurative eye out for the
2008 * 'noPrint' line for the shell from which the output came. If
2009 * we recognize a line, we don't print it. If the command is not
2010 * alone on the line (the character after it is not \0 or \n), we
2011 * do print whatever follows it.
2014 * curPos may be shifted as may the contents of outBuf.
2017 JobDoOutput(Job *job, Boolean finish)
2019 Boolean gotNL = FALSE; /* true if got a newline */
2020 Boolean fbuf; /* true if our buffer filled up */
2021 int nr; /* number of bytes read */
2022 int i; /* auxiliary index into outBuf */
2023 int max; /* limit for i (end of current data) */
2024 int nRead; /* (Temporary) number of bytes read */
2025 FILE *oFILE; /* Stream pointer to shell's output file */
2030 * Read as many bytes as will fit in the buffer.
2036 nRead = read(job->inPipe, &job->outBuf[job->curPos],
2037 JOB_BUFSIZE - job->curPos);
2039 * Check for interrupt here too, because the above read may
2040 * block when the child process is stopped. In this case the
2041 * interrupt will unblock it (we don't use SA_RESTART).
2044 JobPassSig(interrupted);
2047 DEBUGF(JOB, ("JobDoOutput(piperead)"));
2054 * If we hit the end-of-file (the job is dead), we must flush
2055 * its remaining output, so pretend we read a newline if
2056 * there's any output remaining in the buffer.
2057 * Also clear the 'finish' flag so we stop looping.
2059 if (nr == 0 && job->curPos != 0) {
2060 job->outBuf[job->curPos] = '\n';
2063 } else if (nr == 0) {
2068 * Look for the last newline in the bytes we just got. If there
2069 * is one, break out of the loop with 'i' as its index and
2072 max = job->curPos + nr;
2073 for (i = job->curPos + nr - 1; i >= job->curPos; i--) {
2074 if (job->outBuf[i] == '\n') {
2077 } else if (job->outBuf[i] == '\0') {
2081 job->outBuf[i] = ' ';
2087 if (job->curPos == JOB_BUFSIZE) {
2089 * If we've run out of buffer space, we have
2090 * no choice but to print the stuff. sigh.
2096 if (gotNL || fbuf) {
2098 * Need to send the output to the screen. Null terminate
2099 * it first, overwriting the newline character if there
2100 * was one. So long as the line isn't one we should
2101 * filter (according to the shell description), we print
2102 * the line, preceded by a target banner if this target
2103 * isn't the same as the one for which we last printed
2104 * something. The rest of the data in the buffer are
2105 * then shifted down to the start of the buffer and
2106 * curPos is set accordingly.
2108 job->outBuf[i] = '\0';
2109 if (i >= job->curPos) {
2112 cp = JobOutput(job, job->outBuf,
2113 &job->outBuf[i], FALSE);
2116 * There's still more in that buffer. This time,
2117 * though, we know there's no newline at the
2118 * end, so we add one of our own free will.
2121 if (job->node != lastNode) {
2122 MESSAGE(stdout, job->node);
2123 lastNode = job->node;
2125 fprintf(stdout, "%s%s", cp,
2131 /* shift the remaining characters down */
2132 memcpy(job->outBuf, &job->outBuf[i + 1],
2134 job->curPos = max - (i + 1);
2138 * We have written everything out, so we just
2139 * start over from the start of the buffer.
2140 * No copying. No nothing.
2147 * If the finish flag is true, we must loop until we hit
2148 * end-of-file on the pipe. This is guaranteed to happen
2149 * eventually since the other end of the pipe is now
2150 * closed (we closed it explicitly and the child has
2151 * exited). When we do get an EOF, finish will be set
2152 * FALSE and we'll fall through and out.
2159 * We've been called to retrieve the output of the job from the
2160 * temporary file where it's been squirreled away. This consists
2161 * of opening the file, reading the output line by line, being
2162 * sure not to print the noPrint line for the shell we used,
2163 * then close and remove the temporary file. Very simple.
2165 * Change to read in blocks and do FindSubString type things
2166 * as for pipes? That would allow for "@echo -n..."
2168 oFILE = fopen(job->outFile, "r");
2169 if (oFILE != NULL) {
2170 fprintf(stdout, "Results of making %s:\n",
2174 while (fgets(inLine, sizeof(inLine), oFILE) != NULL) {
2175 char *cp, *endp, *oendp;
2178 oendp = endp = inLine + strlen(inLine);
2179 if (endp[-1] == '\n') {
2182 cp = JobOutput(job, inLine, endp, FALSE);
2185 * There's still more in that buffer. This time,
2186 * though, we know there's no newline at the
2187 * end, so we add one of our own free will.
2189 fprintf(stdout, "%s", cp);
2191 if (endp != oendp) {
2192 fprintf(stdout, "\n");
2197 eunlink(job->outFile);
2204 * Handle the exit of a child. Called from Make_Make.
2207 * The job descriptor is removed from the list of children.
2210 * We do waits, blocking or not, according to the wisdom of our
2211 * caller, until there are no more children to report. For each
2212 * job, call JobFinish to finish things off. This will take care of
2213 * putting jobs on the stoppedJobs queue.
2216 Job_CatchChildren(Boolean block)
2218 pid_t pid; /* pid of dead child */
2219 Job *job; /* job descriptor for dead child */
2220 int status; /* Exit/termination status */
2223 * Don't even bother if we know there's no one around.
2230 pid = waitpid((pid_t)-1, &status,
2231 (block ? 0 : WNOHANG) | WUNTRACED);
2235 DEBUGF(JOB, ("Process %jd exited or stopped.\n",
2238 TAILQ_FOREACH(job, &jobs, link) {
2239 if (job->pid == pid)
2244 if (WIFSIGNALED(status) &&
2245 (WTERMSIG(status) == SIGCONT)) {
2246 TAILQ_FOREACH(job, &jobs, link) {
2247 if (job->pid == pid)
2251 Error("Resumed child (%jd) "
2252 "not in table", (intmax_t)pid);
2255 TAILQ_REMOVE(&stoppedJobs, job, link);
2257 Error("Child (%jd) not in table?",
2262 TAILQ_REMOVE(&jobs, job, link);
2264 if (fifoFd >= 0 && maxJobs > 1) {
2265 write(fifoFd, "+", 1);
2267 if (nJobs >= maxJobs)
2272 DEBUGF(JOB, ("Job queue is no longer full.\n"));
2277 JobFinish(job, &status);
2280 JobPassSig(interrupted);
2285 * Catch the output from our children, if we're using
2286 * pipes do so. Otherwise just block time until we get a
2287 * signal(most likely a SIGCHLD) since there's no point in
2288 * just spinning when there's nothing to do and the reaping
2289 * of a child can wait for a while.
2292 * Output is read from pipes if we're piping.
2296 Job_CatchOutput(int flag __unused)
2298 Job_CatchOutput(int flag)
2304 struct kevent kev[KEV_SIZE];
2307 struct timeval timeout;
2316 if ((nfds = kevent(kqfd, NULL, 0, kev, KEV_SIZE, NULL)) == -1) {
2318 Punt("kevent: %s", strerror(errno));
2320 JobPassSig(interrupted);
2322 for (i = 0; i < nfds; i++) {
2323 if (kev[i].flags & EV_ERROR) {
2324 warnc(kev[i].data, "kevent");
2327 switch (kev[i].filter) {
2329 JobDoOutput(kev[i].udata, FALSE);
2333 * Just wake up and let
2334 * Job_CatchChildren() collect the
2343 timeout.tv_sec = SEL_SEC;
2344 timeout.tv_usec = SEL_USEC;
2345 if (flag && jobFull && fifoFd >= 0)
2346 FD_SET(fifoFd, &readfds);
2348 nfds = select(FD_SETSIZE, &readfds, (fd_set *)NULL,
2349 (fd_set *)NULL, &timeout);
2352 JobPassSig(interrupted);
2355 if (fifoFd >= 0 && FD_ISSET(fifoFd, &readfds)) {
2359 job = TAILQ_FIRST(&jobs);
2360 while (nfds != 0 && job != NULL) {
2361 if (FD_ISSET(job->inPipe, &readfds)) {
2362 JobDoOutput(job, FALSE);
2365 job = TAILQ_NEXT(job, link);
2367 #endif /* !USE_KQUEUE */
2373 * Start the creation of a target. Basically a front-end for
2374 * JobStart used by the Make module.
2377 * Another job is started.
2383 JobStart(gn, 0, NULL);
2388 * Initialize the process module, given a maximum number of jobs.
2391 * lists and counters are initialized
2394 Job_Init(int maxproc)
2396 GNode *begin; /* node for commands to do at the very start */
2400 env = getenv("MAKE_JOBS_FIFO");
2402 if (env == NULL && maxproc > 1) {
2404 * We did not find the environment variable so we are the
2405 * leader. Create the fifo, open it, write one char per
2406 * allowed job into the pipe.
2408 fifoFd = mkfifotemp(fifoName);
2413 fcntl(fifoFd, F_SETFL, O_NONBLOCK);
2415 setenv("MAKE_JOBS_FIFO", env, 1);
2416 while (maxproc-- > 0) {
2417 write(fifoFd, "+", 1);
2419 /* The master make does not get a magic token */
2424 } else if (env != NULL) {
2426 * We had the environment variable so we are a slave.
2427 * Open fifo and give ourselves a magic token which represents
2428 * the token our parent make has grabbed to start his make
2429 * process. Otherwise the sub-makes would gobble up tokens and
2430 * the proper number of tokens to specify to -j would depend
2431 * on the depth of the tree and the order of execution.
2433 fifoFd = open(env, O_RDWR, 0);
2435 fcntl(fifoFd, F_SETFL, O_NONBLOCK);
2452 if ((maxJobs == 1 && fifoFd < 0) || beVerbose == 0) {
2454 * If only one job can run at a time, there's no need for a
2455 * banner, no is there?
2462 Proc_Setupsignals(FALSE);
2465 if ((kqfd = kqueue()) == -1) {
2466 Punt("kqueue: %s", strerror(errno));
2470 begin = Targ_FindNode(".BEGIN", TARG_NOCREATE);
2472 if (begin != NULL) {
2473 JobStart(begin, JOB_SPECIAL, (Job *)NULL);
2476 Job_CatchChildren(!usePipes);
2479 postCommands = Targ_FindNode(".END", TARG_CREATE);
2484 * See if the job table is full. It is considered full if it is OR
2485 * if we are in the process of aborting OR if we have
2486 * reached/exceeded our local quota. This prevents any more jobs
2490 * TRUE if the job table is full, FALSE otherwise
2500 if (fifoFd >= 0 && jobFull) {
2501 i = read(fifoFd, &c, 1);
2512 * See if the job table is empty. Because the local concurrency may
2513 * be set to 0, it is possible for the job table to become empty,
2514 * while the list of stoppedJobs remains non-empty. In such a case,
2515 * we want to restart as many jobs as we can.
2518 * 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 int fds[2]; /* Pipe streams */
2720 int status; /* command exit status */
2721 Buffer *buf; /* buffer to store the result */
2729 * Open a pipe for fetching its output
2731 if (pipe(fds) == -1) {
2732 *error = "Couldn't create pipe for \"%s\"";
2736 /* Set close-on-exec on read side of pipe. */
2737 fcntl(fds[0], F_SETFD, fcntl(fds[0], F_GETFD) | FD_CLOEXEC);
2739 ps.in = STDIN_FILENO;
2741 ps.err = STDERR_FILENO;
2743 ps.merge_errors = 0;
2747 /* Set up arguments for shell */
2748 ps.argv = emalloc(4 * sizeof(char *));
2749 ps.argv[0] = strdup(commandShell->name);
2750 ps.argv[1] = strdup("-c");
2751 ps.argv[2] = strdup(cmd);
2756 * Fork. Warning since we are doing vfork() instead of fork(),
2757 * do not allocate memory in the child process!
2759 if ((ps.child_pid = vfork()) == -1) {
2760 *error = "Couldn't exec \"%s\"";
2762 } else if (ps.child_pid == 0) {
2775 close(fds[1]); /* No need for the writing half of the pipe. */
2778 char result[BUFSIZ];
2780 rcnt = read(fds[0], result, sizeof(result));
2782 Buf_AddBytes(buf, (size_t)rcnt, (Byte *)result);
2783 } while (rcnt > 0 || (rcnt == -1 && errno == EINTR));
2786 *error = "Error reading shell's output for \"%s\"";
2789 * Close the input side of the pipe.
2793 status = ProcWait(&ps);
2795 *error = "\"%s\" returned non-zero status";
2797 Buf_StripNewlines(buf);
2805 * Interrupt the creation of the current target and remove it if
2806 * it ain't precious.
2812 * The target is removed and the process exits. If .INTERRUPT exists,
2813 * its commands are run first WITH INTERRUPTS IGNORED..
2816 CompatInterrupt(int signo, GNode *ENDNode)
2819 sigset_t nmask, omask;
2822 sigemptyset(&nmask);
2823 sigaddset(&nmask, SIGINT);
2824 sigaddset(&nmask, SIGTERM);
2825 sigaddset(&nmask, SIGHUP);
2826 sigaddset(&nmask, SIGQUIT);
2827 sigprocmask(SIG_SETMASK, &nmask, &omask);
2829 /* prevent recursion in evaluation of .INTERRUPT */
2832 if (curTarg != NULL && !Targ_Precious(curTarg)) {
2833 const char *file = Var_Value(TARGET, curTarg);
2835 if (!noExecute && eunlink(file) != -1) {
2836 printf("*** %s removed\n", file);
2841 * Run .INTERRUPT only if hit with interrupt signal
2843 if (signo == SIGINT) {
2844 gn = Targ_FindNode(".INTERRUPT", TARG_NOCREATE);
2846 LST_FOREACH(ln, &gn->commands) {
2847 if (Compat_RunCommand(Lst_Datum(ln), gn, ENDNode))
2853 sigprocmask(SIG_SETMASK, &omask, NULL);
2855 if (signo == SIGQUIT)
2857 signal(signo, SIG_DFL);
2858 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.
2868 * 0 if the command succeeded, 1 if an error occurred.
2871 * The node's 'made' field may be set to ERROR.
2874 Compat_RunCommand(char *cmd, GNode *gn, GNode *ENDNode)
2877 char *cmdStart; /* Start of expanded command */
2878 Boolean silent; /* Don't print command */
2879 Boolean doit; /* Execute even in -n */
2880 Boolean errCheck; /* Check errors */
2881 int reason; /* Reason for child's death */
2882 int status; /* Description of child's death */
2883 LstNode *cmdNode; /* Node where current cmd is located */
2884 char **av; /* Argument vector for thing to exec */
2887 silent = gn->type & OP_SILENT;
2888 errCheck = !(gn->type & OP_IGNORE);
2891 cmdNode = Lst_Member(&gn->commands, cmd);
2892 cmdStart = Buf_Peel(Var_Subst(cmd, gn, FALSE));
2894 if (*cmdStart == '\0') {
2896 Error("%s expands to empty string", cmd);
2901 Lst_Replace(cmdNode, cmdStart);
2903 if ((gn->type & OP_SAVE_CMDS) && (gn != ENDNode)) {
2904 Lst_AtEnd(&ENDNode->commands, cmdStart);
2906 } else if (strcmp(cmdStart, "...") == 0) {
2907 gn->type |= OP_SAVE_CMDS;
2911 while (*cmd == '@' || *cmd == '-' || *cmd == '+') {
2915 silent = DEBUG(LOUD) ? FALSE : TRUE;
2929 while (isspace((unsigned char)*cmd))
2933 * Print the command before echoing if we're not supposed to be quiet
2934 * for this one. We also print the command if -n given, but not if '+'.
2936 if (!silent || (noExecute && !doit)) {
2937 printf("%s\n", cmd);
2942 * If we're not supposed to execute any commands, this is as far as
2945 if (!doit && noExecute) {
2949 if (strpbrk(cmd, "#=|^(){};&<>*?[]:$`\\\n")) {
2951 * We found a "meta" character and need to pass the command
2958 const char *sh_builtin[] = {
2959 "alias", "cd", "eval", "exec",
2960 "exit", "read", "set", "ulimit",
2961 "unalias", "umask", "unset", "wait",
2966 * Break the command into words to form an argument
2967 * vector we can execute.
2969 brk_string(&aa, cmd, TRUE);
2972 for (p = sh_builtin; *p != 0; p++) {
2973 if (strcmp(av[0], *p) == 0) {
2975 * This command must be passed by the shell
2976 * for other reasons.. or.. possibly not at
2985 ps.in = STDIN_FILENO;
2986 ps.out = STDOUT_FILENO;
2987 ps.err = STDERR_FILENO;
2989 ps.merge_errors = 0;
2995 * We give the shell the -e flag as well as -c if it's
2996 * supposed to exit when it hits an error.
2998 ps.argv = emalloc(4 * sizeof(char *));
2999 ps.argv[0] = strdup(commandShell->path);
3000 ps.argv[1] = strdup(errCheck ? "-ec" : "-c");
3001 ps.argv[2] = strdup(cmd);
3008 ps.errCheck = errCheck;
3011 * Fork and execute the single command. If the fork fails, we abort.
3012 * Warning since we are doing vfork() instead of fork(),
3013 * do not allocate memory in the child process!
3015 if ((ps.child_pid = vfork()) == -1) {
3016 Fatal("Could not fork");
3018 } else if (ps.child_pid == 0) {
3036 * we need to print out the command associated with this
3037 * Gnode in Targ_PrintCmd from Targ_PrintGraph when debugging
3038 * at level g2, in main(), Fatal() and DieHorribly(),
3039 * therefore do not free it when debugging.
3041 if (!DEBUG(GRAPH2)) {
3046 * The child is off and running. Now all we can do is wait...
3048 reason = ProcWait(&ps);
3051 CompatInterrupt(interrupted, ENDNode);
3054 * Decode and report the reason child exited, then
3055 * indicate how we handled it.
3057 if (WIFEXITED(reason)) {
3058 status = WEXITSTATUS(reason);
3062 printf("*** Error code %d", status);
3064 } else if (WIFSTOPPED(reason)) {
3065 status = WSTOPSIG(reason);
3067 status = WTERMSIG(reason);
3068 printf("*** Signal %d", status);
3079 printf(" (continuing)\n");
3084 * Continue executing
3085 * commands for this target.
3086 * If we return 0, this will
3089 printf(" (ignored)\n");
3097 * Make a target, given the parent, to abort if necessary.
3100 * If an error is detected and not being ignored, the process exits.
3103 CompatMake(GNode *gn, GNode *pgn, GNode *ENDNode, Boolean queryFlag)
3107 if (gn->type & OP_USE) {
3108 Make_HandleUse(gn, pgn);
3110 } else if (gn->made == UNMADE) {
3112 * First mark ourselves to be made, then apply whatever
3113 * transformations the suffix module thinks are necessary.
3114 * Once that's done, we can descend and make all our children.
3115 * If any of them has an error but the -k flag was given, our
3116 * 'make' field will be set FALSE again. This is our signal to
3117 * not attempt to do anything but abort our parent as well.
3120 gn->made = BEINGMADE;
3122 LST_FOREACH(ln, &gn->children)
3123 CompatMake(Lst_Datum(ln), gn, ENDNode, queryFlag);
3130 if (Lst_Member(&gn->iParents, pgn) != NULL) {
3131 Var_Set(IMPSRC, Var_Value(TARGET, gn), pgn);
3135 * All the children were made ok. Now cmtime contains the
3136 * modification time of the newest child, we need to find out
3137 * if we exist and when we were modified last. The criteria for
3138 * datedness are defined by the Make_OODate function.
3140 DEBUGF(MAKE, ("Examining %s...", gn->name));
3141 if (!Make_OODate(gn)) {
3142 gn->made = UPTODATE;
3143 DEBUGF(MAKE, ("up-to-date.\n"));
3146 DEBUGF(MAKE, ("out-of-date.\n"));
3150 * If the user is just seeing if something is out-of-date,
3151 * exit now to tell him/her "yes".
3158 * We need to be re-made. We also have to make sure we've got
3159 * a $? variable. To be nice, we also define the $> variable
3160 * using Make_DoAllVar().
3165 * Alter our type to tell if errors should be ignored or things
3166 * should not be printed so Compat_RunCommand knows what to do.
3168 if (Targ_Ignore(gn)) {
3169 gn->type |= OP_IGNORE;
3171 if (Targ_Silent(gn)) {
3172 gn->type |= OP_SILENT;
3175 if (Job_CheckCommands(gn, Fatal)) {
3177 * Our commands are ok, but we still have to worry
3178 * about the -t flag...
3182 LST_FOREACH(ln, &gn->commands) {
3183 if (Compat_RunCommand(Lst_Datum(ln), gn, ENDNode))
3188 Job_Touch(gn, gn->type & OP_SILENT);
3194 if (gn->made != ERROR) {
3196 * If the node was made successfully, mark it so, update
3197 * its modification time and timestamp all its parents.
3198 * Note that for .ZEROTIME targets, the timestamping
3199 * isn't done. This is to keep its state from affecting
3200 * that of its parent.
3205 * We can't re-stat the thing, but we can at least take
3206 * care of rules where a target depends on a source that
3207 * actually creates the target, but only if it has
3215 * mv y.tab.o parse.o
3216 * cmp -s y.tab.h parse.h || mv y.tab.h parse.h
3218 * In this case, if the definitions produced by yacc
3219 * haven't changed from before, parse.h won't have been
3220 * updated and gn->mtime will reflect the current
3221 * modification time for parse.h. This is something of a
3222 * kludge, I admit, but it's a useful one..
3224 * XXX: People like to use a rule like
3228 * To force things that depend on FRC to be made, so we
3229 * have to check for gn->children being empty as well...
3231 if (!Lst_IsEmpty(&gn->commands) ||
3232 Lst_IsEmpty(&gn->children)) {
3237 * This is what Make does and it's actually a good
3238 * thing, as it allows rules like
3240 * cmp -s y.tab.h parse.h || cp y.tab.h parse.h
3242 * to function as intended. Unfortunately, thanks to
3243 * the stateless nature of NFS (and the speed of this
3244 * program), there are times when the modification time
3245 * of a file created on a remote machine will not be
3246 * modified before the stat() implied by the Dir_MTime
3247 * occurs, thus leading us to believe that the file
3248 * is unchanged, wreaking havoc with files that depend
3251 * I have decided it is better to make too much than to
3252 * make too little, so this stuff is commented out
3253 * unless you're sure it's ok.
3256 if (noExecute || Dir_MTime(gn) == 0) {
3259 if (gn->cmtime > gn->mtime)
3260 gn->mtime = gn->cmtime;
3261 DEBUGF(MAKE, ("update time: %s\n",
3262 Targ_FmtTime(gn->mtime)));
3264 if (!(gn->type & OP_EXEC)) {
3265 pgn->childMade = TRUE;
3266 Make_TimeStamp(pgn, gn);
3269 } else if (keepgoing) {
3273 printf("\n\nStop in %s.\n", Var_Value(".CURDIR", gn));
3276 } else if (gn->made == ERROR) {
3278 * Already had an error when making this beastie. Tell the
3283 if (Lst_Member(&gn->iParents, pgn) != NULL) {
3284 Var_Set(IMPSRC, Var_Value(TARGET, gn), pgn);
3288 Error("Graph cycles through %s\n", gn->name);
3293 if ((gn->type & OP_EXEC) == 0) {
3294 pgn->childMade = TRUE;
3295 Make_TimeStamp(pgn, gn);
3299 if ((gn->type & OP_EXEC) == 0) {
3300 Make_TimeStamp(pgn, gn);
3313 * Start making again, given a list of target nodes.
3322 Compat_Run(Lst *targs, Boolean queryFlag)
3324 GNode *gn = NULL; /* Current root target */
3325 int error_cnt; /* Number of targets not remade due to errors */
3329 Proc_Setupsignals(TRUE);
3331 ENDNode = Targ_FindNode(".END", TARG_CREATE);
3333 * If the user has defined a .BEGIN target, execute the commands
3337 gn = Targ_FindNode(".BEGIN", TARG_NOCREATE);
3339 LST_FOREACH(ln, &gn->commands) {
3340 if (Compat_RunCommand(Lst_Datum(ln), gn, ENDNode))
3343 if (gn->made == ERROR) {
3344 printf("\n\nStop.\n");
3351 * For each entry in the list of targets to create, call CompatMake on
3352 * it to create the thing. CompatMake will leave the 'made' field of gn
3353 * in one of several states:
3354 * UPTODATE gn was already up-to-date
3355 * MADE gn was recreated successfully
3356 * ERROR An error occurred while gn was being created
3357 * ABORTED gn was not remade because one of its inferiors
3358 * could not be made due to errors.
3361 while (!Lst_IsEmpty(targs)) {
3362 gn = Lst_DeQueue(targs);
3363 CompatMake(gn, gn, ENDNode, queryFlag);
3365 if (gn->made == UPTODATE) {
3366 printf("`%s' is up to date.\n", gn->name);
3367 } else if (gn->made == ABORTED) {
3368 printf("`%s' not remade because of errors.\n",
3375 * If the user has defined a .END target, run its commands.
3377 if (error_cnt == 0) {
3378 LST_FOREACH(ln, &ENDNode->commands) {
3379 if (Compat_RunCommand(Lst_Datum(ln), gn, ENDNode))