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
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35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
39 * @(#)job.c 8.2 (Berkeley) 3/19/94
40 * $FreeBSD: src/usr.bin/make/job.c,v 1.75 2005/02/10 14:32:14 harti Exp $
41 * $DragonFly: src/usr.bin/make/job.c,v 1.122 2005/07/02 10:47:13 okumoto Exp $
50 * handle the creation etc. of our child processes.
53 * Job_Make Start the creation of the given target.
56 * Check for and handle the termination of any children.
57 * This must be called reasonably frequently to keep the
58 * whole make going at a decent clip, since job table
59 * entries aren't removed until their process is caught
60 * this way. Its single argument is TRUE if the function
61 * should block waiting for a child to terminate.
63 * Job_CatchOutput Print any output our children have produced. Should
64 * also be called fairly frequently to keep the user
65 * informed of what's going on. If no output is waiting,
66 * it will block for a time given by the SEL_* constants,
67 * below, or until output is ready.
69 * Job_Init Called to intialize this module. in addition, any
70 * commands attached to the .BEGIN target are executed
71 * before this function returns. Hence, the makefile must
72 * have been parsed before this function is called.
74 * Job_Full Return TRUE if the job table is filled.
76 * Job_Empty Return TRUE if the job table is completely empty.
78 * Job_Finish Perform any final processing which needs doing. This
79 * includes the execution of any commands which have
80 * been/were attached to the .END target. It should only
81 * be called when the job table is empty.
83 * Job_AbortAll Abort all currently running jobs. It doesn't handle
84 * output or do anything for the jobs, just kills them.
85 * It should only be called in an emergency, as it were.
88 * Verify that the commands for a target are ok. Provide
89 * them if necessary and possible.
91 * Job_Touch Update a target without really updating it.
93 * Job_Wait Wait for all currently-running jobs to finish.
96 * The routines in this file implement the full-compatibility
97 * mode of PMake. Most of the special functionality of PMake
98 * is available in this mode. Things not supported:
100 * - friendly variable substitution.
103 * Compat_Run Initialize things for this module and recreate
104 * thems as need creatin'
107 #include <sys/queue.h>
108 #include <sys/types.h>
109 #include <sys/select.h>
110 #include <sys/stat.h>
112 #include <sys/event.h>
114 #include <sys/wait.h>
119 #include <inttypes.h>
135 #include "pathnames.h"
144 #define TMPPAT "/tmp/makeXXXXXXXXXX"
145 #define MKLVL_MAXVAL 500
146 #define MKLVL_ENVVAR "__MKLVL__"
150 * The SEL_ constants determine the maximum amount of time spent in select
151 * before coming out to see if a child has finished. SEL_SEC is the number of
152 * seconds and SEL_USEC is the number of micro-seconds
156 #endif /* !USE_KQUEUE */
159 * Job Table definitions.
161 * The job "table" is kept as a linked Lst in 'jobs', with the number of
162 * active jobs maintained in the 'nJobs' variable. At no time will this
163 * exceed the value of 'maxJobs', initialized by the Job_Init function.
165 * When a job is finished, the Make_Update function is called on each of the
166 * parents of the node which was just remade. This takes care of the upward
167 * traversal of the dependency graph.
169 #define JOB_BUFSIZE 1024
172 pid_t pid; /* The child's process ID */
174 struct GNode *node; /* The target the child is making */
177 * A LstNode for the first command to be saved after the job completes.
178 * This is NULL if there was no "..." in the job's commands.
183 * An FILE* for writing out the commands. This is only
184 * used before the job is actually started.
189 * A word of flags which determine how the module handles errors,
190 * echoing, etc. for the job
192 short flags; /* Flags to control treatment of job */
193 #define JOB_IGNERR 0x001 /* Ignore non-zero exits */
194 #define JOB_SILENT 0x002 /* no output */
195 #define JOB_SPECIAL 0x004 /* Target is a special one. i.e. run it locally
196 * if we can't export it and maxLocal is 0 */
197 #define JOB_IGNDOTS 0x008 /* Ignore "..." lines when processing
199 #define JOB_FIRST 0x020 /* Job is first job for the node */
200 #define JOB_RESTART 0x080 /* Job needs to be completely restarted */
201 #define JOB_RESUME 0x100 /* Job needs to be resumed b/c it stopped,
203 #define JOB_CONTINUING 0x200 /* We are in the process of resuming this job.
204 * Used to avoid infinite recursion between
205 * JobFinish and JobRestart */
207 /* union for handling shell's output */
210 * This part is used when usePipes is true.
211 * The output is being caught via a pipe and the descriptors
212 * of our pipe, an array in which output is line buffered and
213 * the current position in that buffer are all maintained for
218 * Input side of pipe associated with
219 * job's output channel
224 * Output side of pipe associated with job's
230 * Buffer for storing the output of the
233 char op_outBuf[JOB_BUFSIZE + 1];
235 /* Current position in op_outBuf */
240 * If usePipes is false the output is routed to a temporary
241 * file and all that is kept is the name of the file and the
242 * descriptor open to the file.
245 /* Name of file to which shell output was rerouted */
246 char of_outFile[sizeof(TMPPAT)];
249 * Stream open to the output file. Used to funnel all
250 * from a single job to one file while still allowing
251 * multiple shell invocations
256 } output; /* Data for tracking a shell's output */
258 TAILQ_ENTRY(Job) link; /* list link */
261 #define outPipe output.o_pipe.op_outPipe
262 #define inPipe output.o_pipe.op_inPipe
263 #define outBuf output.o_pipe.op_outBuf
264 #define curPos output.o_pipe.op_curPos
265 #define outFile output.o_file.of_outFile
266 #define outFd output.o_file.of_outFd
268 TAILQ_HEAD(JobList, Job);
271 * error handling variables
273 static int errors = 0; /* number of errors reported */
274 static int aborting = 0; /* why is the make aborting? */
275 #define ABORT_ERROR 1 /* Because of an error */
276 #define ABORT_INTERRUPT 2 /* Because it was interrupted */
277 #define ABORT_WAIT 3 /* Waiting for jobs to finish */
280 * XXX: Avoid SunOS bug... FILENO() is fp->_file, and file
281 * is a char! So when we go above 127 we turn negative!
283 #define FILENO(a) ((unsigned)fileno(a))
286 * post-make command processing. The node postCommands is really just the
287 * .END target but we keep it around to avoid having to search for it
290 static GNode *postCommands;
293 * The number of commands actually printed for a target. Should this
294 * number be 0, no shell will be executed.
296 static int numCommands;
299 * Return values from JobStart.
301 #define JOB_RUNNING 0 /* Job is running */
302 #define JOB_ERROR 1 /* Error in starting the job */
303 #define JOB_FINISHED 2 /* The job is already finished */
304 #define JOB_STOPPED 3 /* The job is stopped */
307 * The maximum number of jobs that may run. This is initialize from the
308 * -j argument for the leading make and from the FIFO for sub-makes.
311 static int nJobs; /* The number of children currently running */
313 /* The structures that describe them */
314 static struct JobList jobs = TAILQ_HEAD_INITIALIZER(jobs);
316 static Boolean jobFull; /* Flag to tell when the job table is full. It
317 * is set TRUE when (1) the total number of
318 * running jobs equals the maximum allowed */
320 static int kqfd; /* File descriptor obtained by kqueue() */
322 static fd_set outputs; /* Set of descriptors of pipes connected to
323 * the output channels of children */
326 static GNode *lastNode; /* The node for which output was most recently
328 static const char *targFmt; /* Format string to use to head output from a
329 * job when it's not the most-recent job heard
332 #define TARG_FMT "--- %s ---\n" /* Default format */
333 #define MESSAGE(fp, gn) \
334 fprintf(fp, targFmt, gn->name);
337 * When JobStart attempts to run a job but isn't allowed to
338 * or when Job_CatchChildren detects a job that has
339 * been stopped somehow, the job is placed on the stoppedJobs queue to be run
340 * when the next job finishes.
342 * Lst of Job structures describing jobs that were stopped due to
343 * concurrency limits or externally
345 static struct JobList stoppedJobs = TAILQ_HEAD_INITIALIZER(stoppedJobs);
347 static int fifoFd; /* Fd of our job fifo */
348 static char fifoName[] = "/tmp/make_fifo_XXXXXXXXX";
349 static int fifoMaster;
351 static sig_atomic_t interrupted;
354 #if defined(USE_PGRP) && defined(SYSV)
355 # define KILL(pid, sig) killpg(-(pid), (sig))
357 # if defined(USE_PGRP)
358 # define KILL(pid, sig) killpg((pid), (sig))
360 # define KILL(pid, sig) kill((pid), (sig))
365 * Grmpf... There is no way to set bits of the wait structure
366 * anymore with the stupid W*() macros. I liked the union wait
367 * stuff much more. So, we devise our own macros... This is
368 * really ugly, use dramamine sparingly. You have been warned.
370 #define W_SETMASKED(st, val, fun) \
373 int mask = fun(sh); \
375 for (sh = 0; ((mask >> sh) & 1) == 0; sh++) \
377 *(st) = (*(st) & ~mask) | ((val) << sh); \
380 #define W_SETTERMSIG(st, val) W_SETMASKED(st, val, WTERMSIG)
381 #define W_SETEXITSTATUS(st, val) W_SETMASKED(st, val, WEXITSTATUS)
383 static void JobRestart(Job *);
384 static int JobStart(GNode *, int, Job *);
385 static void JobDoOutput(Job *, Boolean);
386 static void JobInterrupt(int, int);
387 static void JobRestartJobs(void);
388 static int Compat_RunCommand(char *, GNode *, GNode *);
390 static GNode *curTarg = NULL;
393 * Create a fifo file with a uniq filename, and returns a file
394 * descriptor to that fifo.
397 mkfifotemp(char *template)
402 const char padchar[] =
403 "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
405 if (template[0] == '\0') {
406 errno = EINVAL; /* bad input string */
410 /* Find end of template string. */
411 pathend = strchr(template, '\0');
415 * Starting from the end of the template replace spaces with 'X' in
416 * them with random characters until there are no more 'X'.
418 while (ptr >= template && *ptr == 'X') {
419 uint32_t rand_num = arc4random() % (sizeof(padchar) - 1);
420 *ptr-- = padchar[rand_num];
424 /* Check the target directory. */
425 for (; ptr > template; --ptr) {
430 if (stat(template, &sbuf) != 0)
433 if (!S_ISDIR(sbuf.st_mode)) {
443 if (mkfifo(template, 0600) == 0) {
446 if ((fd = open(template, O_RDWR, 0600)) < 0) {
453 if (errno != EEXIST) {
459 * If we have a collision, cycle through the space of
462 for (ptr = start;;) {
465 if (*ptr == '\0' || ptr == pathend)
468 pad = strchr(padchar, *ptr);
469 if (pad == NULL || *++pad == '\0') {
481 * In lieu of a good way to prevent every possible looping in make(1), stop
482 * there from being more than MKLVL_MAXVAL processes forked by make(1), to
483 * prevent a forkbomb from happening, in a dumb and mechanical way.
486 * Creates or modifies enviornment variable MKLVL_ENVVAR via setenv().
489 check_make_level(void)
491 char *value = getenv(MKLVL_ENVVAR);
492 int level = (value == NULL) ? 0 : atoi(value);
495 errc(2, EAGAIN, "Invalid value for recursion level (%d).",
497 } else if (level > MKLVL_MAXVAL) {
498 errc(2, EAGAIN, "Max recursion level (%d) exceeded.",
502 sprintf(new_value, "%d", level + 1);
503 setenv(MKLVL_ENVVAR, new_value, 1);
508 * Signal handler - set a variable and defer handling to the main code.
511 catchsignal(int signo)
517 catch_child(int sig __unused)
536 * 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) {
548 /* Initialize signal flag */
552 * Setup handler to catch SIGCHLD so that we get kicked out of
553 * select() when we need to look at a child. This is only known to
554 * matter for the -j case (perhaps without -P).
556 sigemptyset(&sa.sa_mask);
557 sa.sa_handler = catch_child;
558 sa.sa_flags = SA_RESTART | SA_NOCLDSTOP;
559 sigaction(SIGCHLD, &sa, NULL);
562 * Catch the four signals that POSIX specifies if they aren't
565 sigemptyset(&sa.sa_mask);
566 sa.sa_handler = catchsignal;
569 if (signal(SIGHUP, SIG_IGN) != SIG_IGN) {
570 sigaction(SIGHUP, &sa, NULL);
572 if (signal(SIGINT, SIG_IGN) != SIG_IGN) {
573 sigaction(SIGINT, &sa, NULL);
575 if (signal(SIGQUIT, SIG_IGN) != SIG_IGN) {
576 sigaction(SIGQUIT, &sa, NULL);
578 if (signal(SIGTERM, SIG_IGN) != SIG_IGN) {
579 sigaction(SIGTERM, &sa, NULL);
583 if (compat == FALSE) {
585 * There are additional signals that need to be caught and
586 * passed if either the export system wants to be told
587 * directly of signals or if we're giving each job its own
588 * process group (since then it won't get signals from the
589 * terminal driver as we own the terminal)
591 if (signal(SIGTSTP, SIG_IGN) != SIG_IGN) {
592 sigaction(SIGTSTP, &sa, NULL);
594 if (signal(SIGTTOU, SIG_IGN) != SIG_IGN) {
595 sigaction(SIGTTOU, &sa, NULL);
597 if (signal(SIGTTIN, SIG_IGN) != SIG_IGN) {
598 sigaction(SIGTTIN, &sa, NULL);
600 if (signal(SIGWINCH, SIG_IGN) != SIG_IGN) {
601 sigaction(SIGWINCH, &sa, NULL);
608 * Wait for child process to terminate.
611 ProcWait(ProcStuff *ps)
617 * Wait for the process to exit.
620 pid = waitpid(ps->child_pid, &status, 0);
621 if (pid == -1 && errno != EINTR) {
622 Fatal("error in wait: %d", pid);
625 if (pid == ps->child_pid) {
638 * Pass a signal on to all local jobs if
639 * USE_PGRP is defined, then die ourselves.
642 * We die by the same signal.
645 JobPassSig(int signo)
648 sigset_t nmask, omask;
649 struct sigaction act;
652 sigaddset(&nmask, signo);
653 sigprocmask(SIG_SETMASK, &nmask, &omask);
655 DEBUGF(JOB, ("JobPassSig(%d) called.\n", signo));
656 TAILQ_FOREACH(job, &jobs, link) {
657 DEBUGF(JOB, ("JobPassSig passing signal %d to child %jd.\n",
658 signo, (intmax_t)job->pid));
659 KILL(job->pid, signo);
663 * Deal with proper cleanup based on the signal received. We only run
664 * the .INTERRUPT target if the signal was in fact an interrupt.
665 * The other three termination signals are more of a "get out *now*"
668 if (signo == SIGINT) {
669 JobInterrupt(TRUE, signo);
670 } else if (signo == SIGHUP || signo == SIGTERM || signo == SIGQUIT) {
671 JobInterrupt(FALSE, signo);
675 * Leave gracefully if SIGQUIT, rather than core dumping.
677 if (signo == SIGQUIT) {
682 * Send ourselves the signal now we've given the message to everyone
683 * else. Note we block everything else possible while we're getting
684 * the signal. This ensures that all our jobs get continued when we
685 * wake up before we take any other signal.
686 * XXX this comment seems wrong.
688 act.sa_handler = SIG_DFL;
689 sigemptyset(&act.sa_mask);
691 sigaction(signo, &act, NULL);
693 DEBUGF(JOB, ("JobPassSig passing signal to self, mask = %x.\n",
694 ~0 & ~(1 << (signo - 1))));
696 signal(signo, SIG_DFL);
697 KILL(getpid(), signo);
700 TAILQ_FOREACH(job, &jobs, link) {
701 DEBUGF(JOB, ("JobPassSig passing signal %d to child %jd.\n",
702 signo, (intmax_t)job->pid));
703 KILL(job->pid, signo);
706 sigprocmask(SIG_SETMASK, &omask, NULL);
707 sigprocmask(SIG_SETMASK, &omask, NULL);
708 act.sa_handler = JobPassSig;
709 sigaction(signo, &act, NULL);
714 * Put out another command for the given job. If the command starts
715 * with an @ or a - we process it specially. In the former case,
716 * so long as the -s and -n flags weren't given to make, we stick
717 * a shell-specific echoOff command in the script. In the latter,
718 * we ignore errors for the entire job, unless the shell has error
720 * If the command is just "..." we take all future commands for this
721 * job to be commands to be executed once the entire graph has been
722 * made and return non-zero to signal that the end of the commands
723 * was reached. These commands are later attached to the postCommands
724 * node and executed by Job_Finish when all things are done.
725 * This function is called from JobStart via LST_FOREACH.
728 * Always 0, unless the command was "..."
731 * If the command begins with a '-' and the shell has no error control,
732 * the JOB_IGNERR flag is set in the job descriptor.
733 * If the command is "..." and we're not ignoring such things,
734 * tailCmds is set to the successor node of the cmd.
735 * numCommands is incremented if the command is actually printed.
738 JobPrintCommand(char *cmd, Job *job)
740 struct Shell *shell = job->shell;
741 Boolean noSpecials; /* true if we shouldn't worry about
742 * inserting special commands into
743 * the input stream. */
744 Boolean shutUp = FALSE; /* true if we put a no echo command
745 * into the command file */
746 Boolean errOff = FALSE; /* true if we turned error checking
747 * off before printing the command
748 * and need to turn it back on */
749 const char *cmdTemplate;/* Template to use when printing the command */
750 char *cmdStart; /* Start of expanded command */
751 LstNode *cmdNode; /* Node for replacing the command */
753 noSpecials = (noExecute && !(job->node->type & OP_MAKE));
755 if (strcmp(cmd, "...") == 0) {
756 job->node->type |= OP_SAVE_CMDS;
757 if ((job->flags & JOB_IGNDOTS) == 0) {
759 Lst_Succ(Lst_Member(&job->node->commands, cmd));
765 #define DBPRINTF(fmt, arg) \
766 DEBUGF(JOB, (fmt, arg)); \
767 fprintf(job->cmdFILE, fmt, arg); \
768 fflush(job->cmdFILE);
773 * For debugging, we replace each command with the result of expanding
774 * the variables in the command.
776 cmdNode = Lst_Member(&job->node->commands, cmd);
778 cmd = Buf_Peel(Var_Subst(cmd, job->node, FALSE));
781 Lst_Replace(cmdNode, cmdStart);
783 cmdTemplate = "%s\n";
786 * Check for leading @', -' or +'s to control echoing, error checking,
787 * and execution on -n.
789 while (*cmd == '@' || *cmd == '-' || *cmd == '+') {
793 shutUp = DEBUG(LOUD) ? FALSE : TRUE;
803 * We're not actually exececuting anything...
804 * but this one needs to be - use compat mode
807 Compat_RunCommand(cmd, job->node, NULL);
815 while (isspace((unsigned char)*cmd))
819 if (!(job->flags & JOB_SILENT) && !noSpecials &&
821 DBPRINTF("%s\n", shell->echoOff);
828 if (!(job->flags & JOB_IGNERR) && !noSpecials) {
829 if (shell->hasErrCtl) {
831 * We don't want the error-control commands
832 * showing up either, so we turn off echoing
833 * while executing them. We could put another
834 * field in the shell structure to tell
835 * JobDoOutput to look for this string too,
836 * but why make it any more complex than
839 if (!(job->flags & JOB_SILENT) && !shutUp &&
841 DBPRINTF("%s\n", shell->echoOff);
842 DBPRINTF("%s\n", shell->ignErr);
843 DBPRINTF("%s\n", shell->echoOn);
845 DBPRINTF("%s\n", shell->ignErr);
847 } else if (shell->ignErr &&
848 *shell->ignErr != '\0') {
850 * The shell has no error control, so we need to
851 * be weird to get it to ignore any errors from
852 * the command. If echoing is turned on, we turn
853 * it off and use the errCheck template to echo
854 * the command. Leave echoing off so the user
855 * doesn't see the weirdness we go through to
856 * ignore errors. Set cmdTemplate to use the
857 * weirdness instead of the simple "%s\n"
860 if (!(job->flags & JOB_SILENT) && !shutUp &&
862 DBPRINTF("%s\n", shell->echoOff);
863 DBPRINTF(shell->errCheck, cmd);
866 cmdTemplate = shell->ignErr;
868 * The error ignoration (hee hee) is already
869 * taken care of by the ignErr template, so
870 * pretend error checking is still on.
881 DBPRINTF(cmdTemplate, cmd);
885 * If echoing is already off, there's no point in issuing the
886 * echoOff command. Otherwise we issue it and pretend it was on
887 * for the whole command...
889 if (!shutUp && !(job->flags & JOB_SILENT) &&
891 DBPRINTF("%s\n", shell->echoOff);
894 DBPRINTF("%s\n", shell->errCheck);
897 DBPRINTF("%s\n", shell->echoOn);
904 * Called to close both input and output pipes when a job is finished.
907 * The file descriptors associated with the job are closed.
914 #if !defined(USE_KQUEUE)
915 FD_CLR(job->inPipe, &outputs);
917 if (job->outPipe != job->inPipe) {
920 JobDoOutput(job, TRUE);
924 JobDoOutput(job, TRUE);
930 * Do final processing for the given job including updating
931 * parents and starting new jobs as available/necessary. Note
932 * that we pay no attention to the JOB_IGNERR flag here.
933 * This is because when we're called because of a noexecute flag
934 * or something, jstat.w_status is 0 and when called from
935 * Job_CatchChildren, the status is zeroed if it s/b ignored.
938 * Some nodes may be put on the toBeMade queue.
939 * Final commands for the job are placed on postCommands.
941 * If we got an error and are aborting (aborting == ABORT_ERROR) and
942 * the job list is now empty, we are done for the day.
943 * If we recognized an error (errors !=0), we set the aborting flag
944 * to ABORT_ERROR so no more jobs will be started.
947 JobFinish(Job *job, int *status)
952 if (WIFEXITED(*status)) {
953 int job_status = WEXITSTATUS(*status);
957 * Deal with ignored errors in -B mode. We need to
958 * print a message telling of the ignored error as
959 * well as setting status.w_status to 0 so the next
960 * command gets run. To do this, we set done to be
961 * TRUE if in -B mode and the job exited non-zero.
963 if (job_status == 0) {
966 if (job->flags & JOB_IGNERR) {
970 * If it exited non-zero and either we're
971 * doing things our way or we're not ignoring
972 * errors, the job is finished. Similarly, if
973 * the shell died because of a signal the job
974 * is also finished. In these cases, finish
975 * out the job's output before printing the
979 if (job->cmdFILE != NULL &&
980 job->cmdFILE != stdout) {
981 fclose(job->cmdFILE);
986 } else if (WIFSIGNALED(*status)) {
987 if (WTERMSIG(*status) == SIGCONT) {
989 * No need to close things down or anything.
994 * If it exited non-zero and either we're
995 * doing things our way or we're not ignoring
996 * errors, the job is finished. Similarly, if
997 * the shell died because of a signal the job
998 * is also finished. In these cases, finish
999 * out the job's output before printing the
1003 if (job->cmdFILE != NULL &&
1004 job->cmdFILE != stdout) {
1005 fclose(job->cmdFILE);
1011 * No need to close things down or anything.
1016 if (WIFEXITED(*status)) {
1017 if (done || DEBUG(JOB)) {
1022 (job->flags & JOB_IGNERR)) {
1024 * If output is going to a file and this job
1025 * is ignoring errors, arrange to have the
1026 * exit status sent to the output file as
1029 out = fdopen(job->outFd, "w");
1031 Punt("Cannot fdopen");
1036 DEBUGF(JOB, ("Process %jd exited.\n",
1037 (intmax_t)job->pid));
1039 if (WEXITSTATUS(*status) == 0) {
1041 if (usePipes && job->node != lastNode) {
1042 MESSAGE(out, job->node);
1043 lastNode = job->node;
1046 "*** Completed successfully\n");
1049 if (usePipes && job->node != lastNode) {
1050 MESSAGE(out, job->node);
1051 lastNode = job->node;
1053 fprintf(out, "*** Error code %d%s\n",
1054 WEXITSTATUS(*status),
1055 (job->flags & JOB_IGNERR) ?
1058 if (job->flags & JOB_IGNERR) {
1065 } else if (WIFSIGNALED(*status)) {
1066 if (done || DEBUG(JOB) || (WTERMSIG(*status) == SIGCONT)) {
1071 (job->flags & JOB_IGNERR)) {
1073 * If output is going to a file and this job
1074 * is ignoring errors, arrange to have the
1075 * exit status sent to the output file as
1078 out = fdopen(job->outFd, "w");
1080 Punt("Cannot fdopen");
1085 if (WTERMSIG(*status) == SIGCONT) {
1087 * If the beastie has continued, shift the
1088 * Job from the stopped list to the running
1089 * one (or re-stop it if concurrency is
1090 * exceeded) and go and get another child.
1092 if (job->flags & (JOB_RESUME | JOB_RESTART)) {
1093 if (usePipes && job->node != lastNode) {
1094 MESSAGE(out, job->node);
1095 lastNode = job->node;
1097 fprintf(out, "*** Continued\n");
1099 if (!(job->flags & JOB_CONTINUING)) {
1100 DEBUGF(JOB, ("Warning: process %jd was not "
1101 "continuing.\n", (intmax_t) job->pid));
1104 * We don't really want to restart a
1105 * job from scratch just because it
1106 * continued, especially not without
1107 * killing the continuing process!
1108 * That's why this is ifdef'ed out.
1114 job->flags &= ~JOB_CONTINUING;
1115 TAILQ_INSERT_TAIL(&jobs, job, link);
1117 DEBUGF(JOB, ("Process %jd is continuing locally.\n",
1118 (intmax_t) job->pid));
1119 if (nJobs == maxJobs) {
1121 DEBUGF(JOB, ("Job queue is full.\n"));
1127 if (usePipes && job->node != lastNode) {
1128 MESSAGE(out, job->node);
1129 lastNode = job->node;
1132 "*** Signal %d\n", WTERMSIG(*status));
1140 if (compatMake && !usePipes && (job->flags & JOB_IGNERR)) {
1142 * If output is going to a file and this job
1143 * is ignoring errors, arrange to have the
1144 * exit status sent to the output file as
1147 out = fdopen(job->outFd, "w");
1149 Punt("Cannot fdopen");
1154 DEBUGF(JOB, ("Process %jd stopped.\n", (intmax_t) job->pid));
1155 if (usePipes && job->node != lastNode) {
1156 MESSAGE(out, job->node);
1157 lastNode = job->node;
1159 fprintf(out, "*** Stopped -- signal %d\n", WSTOPSIG(*status));
1160 job->flags |= JOB_RESUME;
1161 TAILQ_INSERT_TAIL(&stoppedJobs, job, link);
1167 * Now handle the -B-mode stuff. If the beast still isn't finished,
1168 * try and restart the job on the next command. If JobStart says it's
1169 * ok, it's ok. If there's an error, this puppy is done.
1171 if (compatMake && WIFEXITED(*status) &&
1172 Lst_Succ(job->node->compat_command) != NULL) {
1173 switch (JobStart(job->node, job->flags & JOB_IGNDOTS, job)) {
1179 W_SETEXITSTATUS(status, 1);
1183 * If we got back a JOB_FINISHED code, JobStart has
1184 * already called Make_Update and freed the job
1185 * descriptor. We set done to false here to avoid fake
1186 * cycles and double frees. JobStart needs to do the
1187 * update so we can proceed up the graph when given
1199 if (done && aborting != ABORT_ERROR &&
1200 aborting != ABORT_INTERRUPT && *status == 0) {
1202 * As long as we aren't aborting and the job didn't return a
1203 * non-zero status that we shouldn't ignore, we call
1204 * Make_Update to update the parents. In addition, any saved
1205 * commands for the node are placed on the .END target.
1207 for (ln = job->tailCmds; ln != NULL; ln = LST_NEXT(ln)) {
1208 Lst_AtEnd(&postCommands->commands,
1210 Var_Subst(Lst_Datum(ln), job->node, FALSE)));
1213 job->node->made = MADE;
1214 Make_Update(job->node);
1217 } else if (*status != 0) {
1225 * Set aborting if any error.
1227 if (errors && !keepgoing && aborting != ABORT_INTERRUPT) {
1229 * If we found any errors in this batch of children and the -k
1230 * flag wasn't given, we set the aborting flag so no more jobs
1233 aborting = ABORT_ERROR;
1236 if (aborting == ABORT_ERROR && Job_Empty()) {
1238 * If we are aborting and the job table is now empty, we finish.
1246 * Touch the given target. Called by JobStart when the -t flag was
1247 * given. Prints messages unless told to be silent.
1250 * The data modification of the file is changed. In addition, if the
1251 * file did not exist, it is created.
1254 Job_Touch(GNode *gn, Boolean silent)
1256 int streamID; /* ID of stream opened to do the touch */
1257 struct utimbuf times; /* Times for utime() call */
1259 if (gn->type & (OP_JOIN | OP_USE | OP_EXEC | OP_OPTIONAL)) {
1261 * .JOIN, .USE, .ZEROTIME and .OPTIONAL targets are "virtual"
1262 * targets and, as such, shouldn't really be created.
1268 fprintf(stdout, "touch %s\n", gn->name);
1276 if (gn->type & OP_ARCHV) {
1278 } else if (gn->type & OP_LIB) {
1281 char *file = gn->path ? gn->path : gn->name;
1283 times.actime = times.modtime = now;
1284 if (utime(file, ×) < 0) {
1285 streamID = open(file, O_RDWR | O_CREAT, 0666);
1287 if (streamID >= 0) {
1291 * Read and write a byte to the file to change
1292 * the modification time, then close the file.
1294 if (read(streamID, &c, 1) == 1) {
1295 lseek(streamID, (off_t)0, SEEK_SET);
1296 write(streamID, &c, 1);
1301 fprintf(stdout, "*** couldn't touch %s: %s",
1302 file, strerror(errno));
1311 * Make sure the given node has all the commands it needs.
1314 * TRUE if the commands list is/was ok.
1317 * The node will have commands from the .DEFAULT rule added to it
1321 Job_CheckCommands(GNode *gn, void (*abortProc)(const char *, ...))
1324 if (OP_NOP(gn->type) && Lst_IsEmpty(&gn->commands) &&
1325 (gn->type & OP_LIB) == 0) {
1327 * No commands. Look for .DEFAULT rule from which we might infer
1330 if (DEFAULT != NULL && !Lst_IsEmpty(&DEFAULT->commands)) {
1332 * Make only looks for a .DEFAULT if the node was
1333 * never the target of an operator, so that's what we
1334 * do too. If a .DEFAULT was given, we substitute its
1335 * commands for gn's commands and set the IMPSRC
1336 * variable to be the target's name The DEFAULT node
1337 * acts like a transformation rule, in that gn also
1338 * inherits any attributes or sources attached to
1341 Make_HandleUse(DEFAULT, gn);
1342 Var_Set(IMPSRC, Var_Value(TARGET, gn), gn);
1344 } else if (Dir_MTime(gn) == 0) {
1346 * The node wasn't the target of an operator we have
1347 * no .DEFAULT rule to go on and the target doesn't
1348 * already exist. There's nothing more we can do for
1349 * this branch. If the -k flag wasn't given, we stop
1350 * in our tracks, otherwise we just don't update
1351 * this node's parents so they never get examined.
1353 static const char msg[] =
1354 "make: don't know how to make";
1356 if (gn->type & OP_OPTIONAL) {
1357 fprintf(stdout, "%s %s(ignored)\n",
1360 } else if (keepgoing) {
1361 fprintf(stdout, "%s %s(continuing)\n",
1367 if (strcmp(gn->name,"love") == 0)
1368 (*abortProc)("Not war.");
1371 (*abortProc)("%s %s. Stop",
1382 * Execute the shell for the given job. Called from JobStart and
1386 * A shell is executed, outputs is altered and the Job structure added
1390 JobExec(Job *job, char **argv)
1392 struct Shell *shell = job->shell;
1398 DEBUGF(JOB, ("Running %s\n", job->node->name));
1399 DEBUGF(JOB, ("\tCommand: "));
1400 for (i = 0; argv[i] != NULL; i++) {
1401 DEBUGF(JOB, ("%s ", argv[i]));
1403 DEBUGF(JOB, ("\n"));
1407 * Some jobs produce no output and it's disconcerting to have
1408 * no feedback of their running (since they produce no output, the
1409 * banner with their name in it never appears). This is an attempt to
1410 * provide that feedback, even if nothing follows it.
1412 if (lastNode != job->node && (job->flags & JOB_FIRST) &&
1413 !(job->flags & JOB_SILENT)) {
1414 MESSAGE(stdout, job->node);
1415 lastNode = job->node;
1418 ps.in = FILENO(job->cmdFILE);
1421 * Set up the child's output to be routed through the
1422 * pipe we've created for it.
1424 ps.out = job->outPipe;
1427 * We're capturing output in a file, so we duplicate
1428 * the descriptor to the temporary file into the
1431 ps.out = job->outFd;
1433 ps.err = STDERR_FILENO;
1435 ps.merge_errors = 1;
1443 * Fork. Warning since we are doing vfork() instead of fork(),
1444 * do not allocate memory in the child process!
1446 if ((ps.child_pid = vfork()) == -1) {
1447 Punt("Cannot fork");
1449 } else if (ps.child_pid == 0) {
1456 Proc_Exec(&ps, shell);
1463 job->pid = ps.child_pid;
1465 if (usePipes && (job->flags & JOB_FIRST)) {
1467 * The first time a job is run for a node, we set the
1468 * current position in the buffer to the beginning and
1469 * mark another stream to watch in the outputs mask.
1472 struct kevent kev[2];
1476 #if defined(USE_KQUEUE)
1477 EV_SET(&kev[0], job->inPipe, EVFILT_READ, EV_ADD, 0, 0, job);
1478 EV_SET(&kev[1], job->pid, EVFILT_PROC,
1479 EV_ADD | EV_ONESHOT, NOTE_EXIT, 0, NULL);
1480 if (kevent(kqfd, kev, 2, NULL, 0, NULL) != 0) {
1482 * kevent() will fail if the job is already
1485 if (errno != EINTR && errno != EBADF && errno != ESRCH)
1486 Punt("kevent: %s", strerror(errno));
1489 FD_SET(job->inPipe, &outputs);
1490 #endif /* USE_KQUEUE */
1493 if (job->cmdFILE != NULL && job->cmdFILE != stdout) {
1494 fclose(job->cmdFILE);
1495 job->cmdFILE = NULL;
1499 * Now the job is actually running, add it to the table.
1502 TAILQ_INSERT_TAIL(&jobs, job, link);
1503 if (nJobs == maxJobs) {
1511 * Create the argv needed to execute the shell for a given job.
1514 JobMakeArgv(Job *job, char **argv)
1516 struct Shell *shell = job->shell;
1518 static char args[10]; /* For merged arguments */
1520 argv[0] = shell->name;
1523 if ((shell->exit && *shell->exit != '-') ||
1524 (shell->echo && *shell->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 shell->exit ? shell->exit : "",
1534 (job->flags & JOB_SILENT) ? "" :
1535 shell->echo ? shell->echo : "");
1542 if (!(job->flags & JOB_IGNERR) && shell->exit) {
1543 argv[argc] = shell->exit;
1546 if (!(job->flags & JOB_SILENT) && shell->echo) {
1547 argv[argc] = shell->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 shell 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 shell 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 job = emalloc(sizeof(Job));
1683 previous->flags &= ~(JOB_FIRST | JOB_IGNERR | JOB_SILENT);
1687 job->shell = commandShell;
1689 job->tailCmds = NULL;
1692 * Set the initial value of the flags for this job based on the global
1693 * ones and the node's attributes... Any flags supplied by the caller
1694 * are also added to the field.
1697 if (Targ_Ignore(gn)) {
1698 job->flags |= JOB_IGNERR;
1700 if (Targ_Silent(gn)) {
1701 job->flags |= JOB_SILENT;
1703 job->flags |= flags;
1706 * Check the commands now so any attributes from .DEFAULT have a chance
1707 * to migrate to the node.
1709 if (!compatMake && (job->flags & JOB_FIRST)) {
1710 cmdsOK = Job_CheckCommands(gn, Error);
1716 * If the -n flag wasn't given, we open up OUR (not the child's)
1717 * temporary file to stuff commands in it. The thing is rd/wr so we
1718 * don't need to reopen it to feed it to the shell. If the -n flag
1719 * *was* given, we just set the file to be stdout. Cute, huh?
1721 if ((gn->type & OP_MAKE) || (!noExecute && !touchFlag)) {
1723 * We're serious here, but if the commands were bogus, we're
1730 strcpy(tfile, TMPPAT);
1731 if ((tfd = mkstemp(tfile)) == -1)
1732 Punt("Cannot create temp file: %s", strerror(errno));
1733 job->cmdFILE = fdopen(tfd, "w+");
1735 if (job->cmdFILE == NULL) {
1737 Punt("Could not open %s", tfile);
1739 fcntl(FILENO(job->cmdFILE), F_SETFD, 1);
1741 * Send the commands to the command file, flush all its
1742 * buffers then rewind and remove the thing.
1747 * Used to be backwards; replace when start doing multiple
1748 * commands per shell.
1752 * Be compatible: If this is the first time for this
1753 * node, verify its commands are ok and open the
1754 * commands list for sequential access by later
1755 * invocations of JobStart. Once that is done, we take
1756 * the next command off the list and print it to the
1757 * command file. If the command was an ellipsis, note
1758 * that there's nothing more to execute.
1760 if (job->flags & JOB_FIRST)
1761 gn->compat_command = Lst_First(&gn->commands);
1763 gn->compat_command =
1764 Lst_Succ(gn->compat_command);
1766 if (gn->compat_command == NULL ||
1767 JobPrintCommand(Lst_Datum(gn->compat_command), job))
1770 if (noExec && !(job->flags & JOB_FIRST)) {
1772 * If we're not going to execute anything, the
1773 * job is done and we need to close down the
1774 * various file descriptors we've opened for
1775 * output, then call JobDoOutput to catch the
1776 * final characters or send the file to the
1777 * screen... Note that the i/o streams are only
1778 * open if this isn't the first job. Note also
1779 * that this could not be done in
1780 * Job_CatchChildren b/c it wasn't clear if
1781 * there were more commands to execute or not...
1787 * We can do all the commands at once. hooray for sanity
1790 LST_FOREACH(ln, &gn->commands) {
1791 if (JobPrintCommand(Lst_Datum(ln), job))
1796 * If we didn't print out any commands to the shell
1797 * script, there's not much point in executing the
1800 if (numCommands == 0) {
1805 } else if (noExecute) {
1807 * Not executing anything -- just print all the commands to
1808 * stdout in one fell swoop. This will still set up
1809 * job->tailCmds correctly.
1811 if (lastNode != gn) {
1812 MESSAGE(stdout, gn);
1815 job->cmdFILE = stdout;
1818 * Only print the commands if they're ok, but don't die if
1819 * they're not -- just let the user know they're bad and keep
1820 * going. It doesn't do any harm in this case and may do
1824 LST_FOREACH(ln, &gn->commands) {
1825 if (JobPrintCommand(Lst_Datum(ln), job))
1830 * Don't execute the shell, thank you.
1836 * Just touch the target and note that no shell should be
1837 * executed. Set cmdFILE to stdout to make life easier. Check
1838 * the commands, too, but don't die if they're no good -- it
1839 * does no harm to keep working up the graph.
1841 job->cmdFILE = stdout;
1842 Job_Touch(gn, job->flags & JOB_SILENT);
1847 * If we're not supposed to execute a shell, don't.
1851 * Unlink and close the command file if we opened one
1853 if (job->cmdFILE != stdout) {
1854 if (job->cmdFILE != NULL)
1855 fclose(job->cmdFILE);
1861 * We only want to work our way up the graph if we aren't here
1862 * because the commands for the job were no good.
1865 if (aborting == 0) {
1866 for (ln = job->tailCmds; ln != NULL;
1867 ln = LST_NEXT(ln)) {
1868 Lst_AtEnd(&postCommands->commands,
1869 Buf_Peel(Var_Subst(Lst_Datum(ln),
1870 job->node, FALSE)));
1872 job->node->made = MADE;
1873 Make_Update(job->node);
1876 return(JOB_FINISHED);
1882 fflush(job->cmdFILE);
1886 * Set up the control arguments to the shell. This is based on the flags
1887 * set earlier for this job.
1889 JobMakeArgv(job, argv);
1892 * If we're using pipes to catch output, create the pipe by which we'll
1893 * get the shell's output. If we're using files, print out that we're
1894 * starting a job and then set up its temporary-file name.
1896 if (!compatMake || (job->flags & JOB_FIRST)) {
1901 Punt("Cannot create pipe: %s", strerror(errno));
1902 job->inPipe = fd[0];
1903 job->outPipe = fd[1];
1904 fcntl(job->inPipe, F_SETFD, 1);
1905 fcntl(job->outPipe, F_SETFD, 1);
1907 fprintf(stdout, "Remaking `%s'\n", gn->name);
1909 strcpy(job->outFile, TMPPAT);
1910 if ((job->outFd = mkstemp(job->outFile)) == -1)
1911 Punt("cannot create temp file: %s",
1913 fcntl(job->outFd, F_SETFD, 1);
1917 if (nJobs >= maxJobs && !(job->flags & JOB_SPECIAL) && maxJobs != 0) {
1919 * We've hit the limit of concurrency, so put the job on hold
1920 * until some other job finishes. Note that the special jobs
1921 * (.BEGIN, .INTERRUPT and .END) may be run even when the
1922 * limit has been reached (e.g. when maxJobs == 0).
1926 DEBUGF(JOB, ("Can only run job locally.\n"));
1927 job->flags |= JOB_RESTART;
1928 TAILQ_INSERT_TAIL(&stoppedJobs, job, link);
1930 if (nJobs >= maxJobs) {
1932 * If we're running this job as a special case
1933 * (see above), at least say the table is full.
1936 DEBUGF(JOB, ("Local job queue is full.\n"));
1940 return (JOB_RUNNING);
1944 JobOutput(Job *job, char *cp, char *endp, int msg)
1946 struct Shell *shell = job->shell;
1949 if (shell->noPrint) {
1950 ecp = strstr(cp, shell->noPrint);
1951 while (ecp != NULL) {
1954 if (msg && job->node != lastNode) {
1955 MESSAGE(stdout, job->node);
1956 lastNode = job->node;
1959 * The only way there wouldn't be a newline
1960 * after this line is if it were the last in
1961 * the buffer. However, since the non-printable
1962 * comes after it, there must be a newline, so
1963 * we don't print one.
1965 fprintf(stdout, "%s", cp);
1968 cp = ecp + strlen(shell->noPrint);
1971 * Still more to print, look again after
1972 * skipping the whitespace following the
1973 * non-printable command....
1976 while (*cp == ' ' || *cp == '\t' ||
1980 ecp = strstr(cp, shell->noPrint);
1991 * This function is called at different times depending on
1992 * whether the user has specified that output is to be collected
1993 * via pipes or temporary files. In the former case, we are called
1994 * whenever there is something to read on the pipe. We collect more
1995 * output from the given job and store it in the job's outBuf. If
1996 * this makes up a line, we print it tagged by the job's identifier,
1998 * If output has been collected in a temporary file, we open the
1999 * file and read it line by line, transfering it to our own
2000 * output channel until the file is empty. At which point we
2001 * remove the temporary file.
2002 * In both cases, however, we keep our figurative eye out for the
2003 * 'noPrint' line for the shell from which the output came. If
2004 * we recognize a line, we don't print it. If the command is not
2005 * alone on the line (the character after it is not \0 or \n), we
2006 * do print whatever follows it.
2009 * curPos may be shifted as may the contents of outBuf.
2012 JobDoOutput(Job *job, Boolean finish)
2014 Boolean gotNL = FALSE; /* true if got a newline */
2015 Boolean fbuf; /* true if our buffer filled up */
2016 int nr; /* number of bytes read */
2017 int i; /* auxiliary index into outBuf */
2018 int max; /* limit for i (end of current data) */
2019 int nRead; /* (Temporary) number of bytes read */
2020 FILE *oFILE; /* Stream pointer to shell's output file */
2025 * Read as many bytes as will fit in the buffer.
2031 nRead = read(job->inPipe, &job->outBuf[job->curPos],
2032 JOB_BUFSIZE - job->curPos);
2034 * Check for interrupt here too, because the above read may
2035 * block when the child process is stopped. In this case the
2036 * interrupt will unblock it (we don't use SA_RESTART).
2039 JobPassSig(interrupted);
2042 DEBUGF(JOB, ("JobDoOutput(piperead)"));
2049 * If we hit the end-of-file (the job is dead), we must flush
2050 * its remaining output, so pretend we read a newline if
2051 * there's any output remaining in the buffer.
2052 * Also clear the 'finish' flag so we stop looping.
2054 if (nr == 0 && job->curPos != 0) {
2055 job->outBuf[job->curPos] = '\n';
2058 } else if (nr == 0) {
2063 * Look for the last newline in the bytes we just got. If there
2064 * is one, break out of the loop with 'i' as its index and
2067 max = job->curPos + nr;
2068 for (i = job->curPos + nr - 1; i >= job->curPos; i--) {
2069 if (job->outBuf[i] == '\n') {
2072 } else if (job->outBuf[i] == '\0') {
2076 job->outBuf[i] = ' ';
2082 if (job->curPos == JOB_BUFSIZE) {
2084 * If we've run out of buffer space, we have
2085 * no choice but to print the stuff. sigh.
2091 if (gotNL || fbuf) {
2093 * Need to send the output to the screen. Null terminate
2094 * it first, overwriting the newline character if there
2095 * was one. So long as the line isn't one we should
2096 * filter (according to the shell description), we print
2097 * the line, preceded by a target banner if this target
2098 * isn't the same as the one for which we last printed
2099 * something. The rest of the data in the buffer are
2100 * then shifted down to the start of the buffer and
2101 * curPos is set accordingly.
2103 job->outBuf[i] = '\0';
2104 if (i >= job->curPos) {
2107 cp = JobOutput(job, job->outBuf,
2108 &job->outBuf[i], FALSE);
2111 * There's still more in that buffer. This time,
2112 * though, we know there's no newline at the
2113 * end, so we add one of our own free will.
2116 if (job->node != lastNode) {
2117 MESSAGE(stdout, job->node);
2118 lastNode = job->node;
2120 fprintf(stdout, "%s%s", cp,
2126 /* shift the remaining characters down */
2127 memcpy(job->outBuf, &job->outBuf[i + 1],
2129 job->curPos = max - (i + 1);
2133 * We have written everything out, so we just
2134 * start over from the start of the buffer.
2135 * No copying. No nothing.
2142 * If the finish flag is true, we must loop until we hit
2143 * end-of-file on the pipe. This is guaranteed to happen
2144 * eventually since the other end of the pipe is now
2145 * closed (we closed it explicitly and the child has
2146 * exited). When we do get an EOF, finish will be set
2147 * FALSE and we'll fall through and out.
2154 * We've been called to retrieve the output of the job from the
2155 * temporary file where it's been squirreled away. This consists
2156 * of opening the file, reading the output line by line, being
2157 * sure not to print the noPrint line for the shell we used,
2158 * then close and remove the temporary file. Very simple.
2160 * Change to read in blocks and do FindSubString type things
2161 * as for pipes? That would allow for "@echo -n..."
2163 oFILE = fopen(job->outFile, "r");
2164 if (oFILE != NULL) {
2165 fprintf(stdout, "Results of making %s:\n",
2169 while (fgets(inLine, sizeof(inLine), oFILE) != NULL) {
2170 char *cp, *endp, *oendp;
2173 oendp = endp = inLine + strlen(inLine);
2174 if (endp[-1] == '\n') {
2177 cp = JobOutput(job, inLine, endp, FALSE);
2180 * There's still more in that buffer. This time,
2181 * though, we know there's no newline at the
2182 * end, so we add one of our own free will.
2184 fprintf(stdout, "%s", cp);
2186 if (endp != oendp) {
2187 fprintf(stdout, "\n");
2192 eunlink(job->outFile);
2199 * Handle the exit of a child. Called from Make_Make.
2202 * The job descriptor is removed from the list of children.
2205 * We do waits, blocking or not, according to the wisdom of our
2206 * caller, until there are no more children to report. For each
2207 * job, call JobFinish to finish things off. This will take care of
2208 * putting jobs on the stoppedJobs queue.
2211 Job_CatchChildren(Boolean block)
2213 pid_t pid; /* pid of dead child */
2214 Job *job; /* job descriptor for dead child */
2215 int status; /* Exit/termination status */
2218 * Don't even bother if we know there's no one around.
2225 pid = waitpid((pid_t)-1, &status,
2226 (block ? 0 : WNOHANG) | WUNTRACED);
2230 DEBUGF(JOB, ("Process %jd exited or stopped.\n",
2233 TAILQ_FOREACH(job, &jobs, link) {
2234 if (job->pid == pid)
2239 if (WIFSIGNALED(status) &&
2240 (WTERMSIG(status) == SIGCONT)) {
2241 TAILQ_FOREACH(job, &jobs, link) {
2242 if (job->pid == pid)
2246 Error("Resumed child (%jd) "
2247 "not in table", (intmax_t)pid);
2250 TAILQ_REMOVE(&stoppedJobs, job, link);
2252 Error("Child (%jd) not in table?",
2257 TAILQ_REMOVE(&jobs, job, link);
2259 if (fifoFd >= 0 && maxJobs > 1) {
2260 write(fifoFd, "+", 1);
2262 if (nJobs >= maxJobs)
2267 DEBUGF(JOB, ("Job queue is no longer full.\n"));
2272 JobFinish(job, &status);
2275 JobPassSig(interrupted);
2280 * Catch the output from our children, if we're using
2281 * pipes do so. Otherwise just block time until we get a
2282 * signal(most likely a SIGCHLD) since there's no point in
2283 * just spinning when there's nothing to do and the reaping
2284 * of a child can wait for a while.
2287 * Output is read from pipes if we're piping.
2291 Job_CatchOutput(int flag __unused)
2293 Job_CatchOutput(int flag)
2299 struct kevent kev[KEV_SIZE];
2302 struct timeval timeout;
2311 if ((nfds = kevent(kqfd, NULL, 0, kev, KEV_SIZE, NULL)) == -1) {
2313 Punt("kevent: %s", strerror(errno));
2315 JobPassSig(interrupted);
2317 for (i = 0; i < nfds; i++) {
2318 if (kev[i].flags & EV_ERROR) {
2319 warnc(kev[i].data, "kevent");
2322 switch (kev[i].filter) {
2324 JobDoOutput(kev[i].udata, FALSE);
2328 * Just wake up and let
2329 * Job_CatchChildren() collect the
2338 timeout.tv_sec = SEL_SEC;
2339 timeout.tv_usec = SEL_USEC;
2340 if (flag && jobFull && fifoFd >= 0)
2341 FD_SET(fifoFd, &readfds);
2343 nfds = select(FD_SETSIZE, &readfds, (fd_set *)NULL,
2344 (fd_set *)NULL, &timeout);
2347 JobPassSig(interrupted);
2350 if (fifoFd >= 0 && FD_ISSET(fifoFd, &readfds)) {
2354 job = TAILQ_FIRST(&jobs);
2355 while (nfds != 0 && job != NULL) {
2356 if (FD_ISSET(job->inPipe, &readfds)) {
2357 JobDoOutput(job, FALSE);
2360 job = TAILQ_NEXT(job, link);
2362 #endif /* !USE_KQUEUE */
2368 * Start the creation of a target. Basically a front-end for
2369 * JobStart used by the Make module.
2372 * Another job is started.
2378 JobStart(gn, 0, NULL);
2383 * Initialize the process module, given a maximum number of jobs.
2386 * lists and counters are initialized
2389 Job_Init(int maxproc)
2391 GNode *begin; /* node for commands to do at the very start */
2395 env = getenv("MAKE_JOBS_FIFO");
2397 if (env == NULL && maxproc > 1) {
2399 * We did not find the environment variable so we are the
2400 * leader. Create the fifo, open it, write one char per
2401 * allowed job into the pipe.
2403 fifoFd = mkfifotemp(fifoName);
2408 fcntl(fifoFd, F_SETFL, O_NONBLOCK);
2410 setenv("MAKE_JOBS_FIFO", env, 1);
2411 while (maxproc-- > 0) {
2412 write(fifoFd, "+", 1);
2414 /* The master make does not get a magic token */
2419 } else if (env != NULL) {
2421 * We had the environment variable so we are a slave.
2422 * Open fifo and give ourselves a magic token which represents
2423 * the token our parent make has grabbed to start his make
2424 * process. Otherwise the sub-makes would gobble up tokens and
2425 * the proper number of tokens to specify to -j would depend
2426 * on the depth of the tree and the order of execution.
2428 fifoFd = open(env, O_RDWR, 0);
2430 fcntl(fifoFd, F_SETFL, O_NONBLOCK);
2447 if ((maxJobs == 1 && fifoFd < 0) || beVerbose == 0) {
2449 * If only one job can run at a time, there's no need for a
2450 * banner, no is there?
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.
2518 if (!TAILQ_EMPTY(&stoppedJobs) && !aborting) {
2520 * The job table is obviously not full if it has no
2521 * jobs in it...Try and restart the stopped jobs.
2536 * Handle the receipt of an interrupt.
2539 * All children are killed. Another job will be started if the
2540 * .INTERRUPT target was given.
2543 JobInterrupt(int runINTERRUPT, int signo)
2545 Job *job; /* job descriptor in that element */
2546 GNode *interrupt; /* the node describing the .INTERRUPT target */
2548 aborting = ABORT_INTERRUPT;
2550 TAILQ_FOREACH(job, &jobs, link) {
2551 if (!Targ_Precious(job->node)) {
2552 char *file = (job->node->path == NULL ?
2553 job->node->name : job->node->path);
2555 if (!noExecute && eunlink(file) != -1) {
2556 Error("*** %s removed", file);
2560 DEBUGF(JOB, ("JobInterrupt passing signal to child "
2561 "%jd.\n", (intmax_t)job->pid));
2562 KILL(job->pid, signo);
2566 if (runINTERRUPT && !touchFlag) {
2568 * clear the interrupted flag because we would get an
2569 * infinite loop otherwise.
2573 interrupt = Targ_FindNode(".INTERRUPT", TARG_NOCREATE);
2574 if (interrupt != NULL) {
2575 ignoreErrors = FALSE;
2577 JobStart(interrupt, JOB_IGNDOTS, (Job *)NULL);
2580 Job_CatchChildren(!usePipes);
2588 * Do final processing such as the running of the commands
2589 * attached to the .END target.
2592 * Number of errors reported.
2598 if (postCommands != NULL && !Lst_IsEmpty(&postCommands->commands)) {
2600 Error("Errors reported so .END ignored");
2602 JobStart(postCommands, JOB_SPECIAL | JOB_IGNDOTS, NULL);
2606 Job_CatchChildren(!usePipes);
2621 * Waits for all running jobs to finish and returns. Sets 'aborting'
2622 * to ABORT_WAIT to prevent other jobs from starting.
2625 * Currently running jobs finish.
2631 aborting = ABORT_WAIT;
2632 while (nJobs != 0) {
2634 Job_CatchChildren(!usePipes);
2641 * Abort all currently running jobs without handling output or anything.
2642 * This function is to be called only in the event of a major
2643 * error. Most definitely NOT to be called from JobInterrupt.
2646 * All children are killed, not just the firstborn
2651 Job *job; /* the job descriptor in that element */
2654 aborting = ABORT_ERROR;
2657 TAILQ_FOREACH(job, &jobs, link) {
2659 * kill the child process with increasingly drastic
2660 * signals to make darn sure it's dead.
2662 KILL(job->pid, SIGINT);
2663 KILL(job->pid, SIGKILL);
2668 * Catch as many children as want to report in at first, then give up
2670 while (waitpid((pid_t)-1, &status, WNOHANG) > 0)
2676 * Tries to restart stopped jobs if there are slots available.
2677 * Note that this tries to restart them regardless of pending errors.
2678 * It's not good to leave stopped jobs lying around!
2681 * Resumes(and possibly migrates) jobs.
2684 JobRestartJobs(void)
2688 while (!jobFull && (job = TAILQ_FIRST(&stoppedJobs)) != NULL) {
2689 DEBUGF(JOB, ("Job queue is not full. "
2690 "Restarting a stopped job.\n"));
2691 TAILQ_REMOVE(&stoppedJobs, job, link);
2698 * Execute the command in cmd, and return the output of that command
2702 * A string containing the output of the command, or the empty string
2703 * If error is not NULL, it contains the reason for the command failure
2704 * Any output sent to stderr in the child process is passed to stderr,
2705 * and not captured in the string.
2708 * The string must be freed by the caller.
2711 Cmd_Exec(const char *cmd, const char **error)
2713 struct Shell *shell = commandShell;
2714 int fds[2]; /* Pipe streams */
2715 int status; /* command exit status */
2716 Buffer *buf; /* buffer to store the result */
2724 * Open a pipe for fetching its output
2726 if (pipe(fds) == -1) {
2727 *error = "Couldn't create pipe for \"%s\"";
2731 /* Set close-on-exec on read side of pipe. */
2732 fcntl(fds[0], F_SETFD, fcntl(fds[0], F_GETFD) | FD_CLOEXEC);
2734 ps.in = STDIN_FILENO;
2736 ps.err = STDERR_FILENO;
2738 ps.merge_errors = 0;
2742 /* Set up arguments for shell */
2743 ps.argv = emalloc(4 * sizeof(char *));
2744 ps.argv[0] = strdup(shell->name);
2745 ps.argv[1] = strdup("-c");
2746 ps.argv[2] = strdup(cmd);
2751 * Fork. Warning since we are doing vfork() instead of fork(),
2752 * do not allocate memory in the child process!
2754 if ((ps.child_pid = vfork()) == -1) {
2755 *error = "Couldn't exec \"%s\"";
2757 } else if (ps.child_pid == 0) {
2761 Proc_Exec(&ps, shell);
2770 close(fds[1]); /* No need for the writing half of the pipe. */
2773 char result[BUFSIZ];
2775 rcnt = read(fds[0], result, sizeof(result));
2777 Buf_AddBytes(buf, (size_t)rcnt, (Byte *)result);
2778 } while (rcnt > 0 || (rcnt == -1 && errno == EINTR));
2781 *error = "Error reading shell's output for \"%s\"";
2784 * Close the input side of the pipe.
2788 status = ProcWait(&ps);
2790 *error = "\"%s\" returned non-zero status";
2792 Buf_StripNewlines(buf);
2800 * Interrupt the creation of the current target and remove it if
2801 * it ain't precious.
2807 * The target is removed and the process exits. If .INTERRUPT exists,
2808 * its commands are run first WITH INTERRUPTS IGNORED..
2811 CompatInterrupt(int signo, GNode *ENDNode)
2814 sigset_t nmask, omask;
2817 sigemptyset(&nmask);
2818 sigaddset(&nmask, SIGINT);
2819 sigaddset(&nmask, SIGTERM);
2820 sigaddset(&nmask, SIGHUP);
2821 sigaddset(&nmask, SIGQUIT);
2822 sigprocmask(SIG_SETMASK, &nmask, &omask);
2824 /* prevent recursion in evaluation of .INTERRUPT */
2827 if (curTarg != NULL && !Targ_Precious(curTarg)) {
2828 const char *file = Var_Value(TARGET, curTarg);
2830 if (!noExecute && eunlink(file) != -1) {
2831 printf("*** %s removed\n", file);
2836 * Run .INTERRUPT only if hit with interrupt signal
2838 if (signo == SIGINT) {
2839 gn = Targ_FindNode(".INTERRUPT", TARG_NOCREATE);
2841 LST_FOREACH(ln, &gn->commands) {
2842 if (Compat_RunCommand(Lst_Datum(ln), gn, ENDNode))
2848 sigprocmask(SIG_SETMASK, &omask, NULL);
2850 if (signo == SIGQUIT)
2852 signal(signo, SIG_DFL);
2853 kill(getpid(), signo);
2857 * Execute the next command for a target. If the command returns an
2858 * error, the node's made field is set to ERROR and creation stops.
2859 * The node from which the command came is also given. This is used
2860 * to execute the commands in compat mode and when executing commands
2861 * with the '+' flag in non-compat mode. In these modes each command
2862 * line should be executed by its own shell. We do some optimisation here:
2863 * if the shell description defines both a string of meta characters and
2864 * a list of builtins and the command line neither contains a meta character
2865 * nor starts with one of the builtins then we execute the command directly
2866 * without invoking a shell.
2869 * 0 if the command succeeded, 1 if an error occurred.
2872 * The node's 'made' field may be set to ERROR.
2875 Compat_RunCommand(char *cmd, GNode *gn, GNode *ENDNode)
2877 struct Shell *shell = commandShell;
2879 char *cmdStart; /* Start of expanded command */
2880 Boolean silent; /* Don't print command */
2881 Boolean doit; /* Execute even in -n */
2882 Boolean errCheck; /* Check errors */
2883 int reason; /* Reason for child's death */
2884 int status; /* Description of child's death */
2885 LstNode *cmdNode; /* Node where current cmd is located */
2886 char **av; /* Argument vector for thing to exec */
2889 silent = gn->type & OP_SILENT;
2890 errCheck = !(gn->type & OP_IGNORE);
2893 cmdNode = Lst_Member(&gn->commands, cmd);
2894 cmdStart = Buf_Peel(Var_Subst(cmd, gn, FALSE));
2896 if (*cmdStart == '\0') {
2898 Error("%s expands to empty string", cmd);
2903 Lst_Replace(cmdNode, cmdStart);
2905 if ((gn->type & OP_SAVE_CMDS) && (gn != ENDNode)) {
2906 Lst_AtEnd(&ENDNode->commands, cmdStart);
2908 } else if (strcmp(cmdStart, "...") == 0) {
2909 gn->type |= OP_SAVE_CMDS;
2913 while (*cmd == '@' || *cmd == '-' || *cmd == '+') {
2917 silent = DEBUG(LOUD) ? FALSE : TRUE;
2931 while (isspace((unsigned char)*cmd))
2935 * Print the command before echoing if we're not supposed to be quiet
2936 * for this one. We also print the command if -n given, but not if '+'.
2938 if (!silent || (noExecute && !doit)) {
2939 printf("%s\n", cmd);
2944 * If we're not supposed to execute any commands, this is as far as
2947 if (!doit && noExecute) {
2951 if (shell->meta != NULL &&
2952 strpbrk(cmd, shell->meta) != NULL) {
2954 * We found a "meta" character and need to pass the command
2961 char **sh_builtin = shell->builtins.argv + 1;
2964 * Break the command into words to form an argument
2965 * vector we can execute.
2967 brk_string(&aa, cmd, TRUE);
2970 for (p = sh_builtin; *p != 0; p++) {
2971 if (strcmp(av[0], *p) == 0) {
2973 * This command must be passed by the shell
2974 * for other reasons.. or.. possibly not at
2983 ps.in = STDIN_FILENO;
2984 ps.out = STDOUT_FILENO;
2985 ps.err = STDERR_FILENO;
2987 ps.merge_errors = 0;
2993 * We give the shell the -e flag as well as -c if it's
2994 * supposed to exit when it hits an error.
2996 ps.argv = emalloc(4 * sizeof(char *));
2997 ps.argv[0] = strdup(shell->path);
2998 ps.argv[1] = strdup(errCheck ? "-ec" : "-c");
2999 ps.argv[2] = strdup(cmd);
3006 ps.errCheck = errCheck;
3009 * Fork and execute the single command. If the fork fails, we abort.
3010 * Warning since we are doing vfork() instead of fork(),
3011 * do not allocate memory in the child process!
3013 if ((ps.child_pid = vfork()) == -1) {
3014 Fatal("Could not fork");
3016 } else if (ps.child_pid == 0) {
3020 Proc_Exec(&ps, shell);
3034 * we need to print out the command associated with this
3035 * Gnode in Targ_PrintCmd from Targ_PrintGraph when debugging
3036 * at level g2, in main(), Fatal() and DieHorribly(),
3037 * therefore do not free it when debugging.
3039 if (!DEBUG(GRAPH2)) {
3044 * The child is off and running. Now all we can do is wait...
3046 reason = ProcWait(&ps);
3049 CompatInterrupt(interrupted, ENDNode);
3052 * Decode and report the reason child exited, then
3053 * indicate how we handled it.
3055 if (WIFEXITED(reason)) {
3056 status = WEXITSTATUS(reason);
3060 printf("*** Error code %d", status);
3062 } else if (WIFSTOPPED(reason)) {
3063 status = WSTOPSIG(reason);
3065 status = WTERMSIG(reason);
3066 printf("*** Signal %d", status);
3077 printf(" (continuing)\n");
3082 * Continue executing
3083 * commands for this target.
3084 * If we return 0, this will
3087 printf(" (ignored)\n");
3095 * Make a target, given the parent, to abort if necessary.
3098 * If an error is detected and not being ignored, the process exits.
3101 CompatMake(GNode *gn, GNode *pgn, GNode *ENDNode, Boolean queryFlag)
3105 if (gn->type & OP_USE) {
3106 Make_HandleUse(gn, pgn);
3108 } else if (gn->made == UNMADE) {
3110 * First mark ourselves to be made, then apply whatever
3111 * transformations the suffix module thinks are necessary.
3112 * Once that's done, we can descend and make all our children.
3113 * If any of them has an error but the -k flag was given, our
3114 * 'make' field will be set FALSE again. This is our signal to
3115 * not attempt to do anything but abort our parent as well.
3118 gn->made = BEINGMADE;
3120 LST_FOREACH(ln, &gn->children)
3121 CompatMake(Lst_Datum(ln), gn, ENDNode, queryFlag);
3128 if (Lst_Member(&gn->iParents, pgn) != NULL) {
3129 Var_Set(IMPSRC, Var_Value(TARGET, gn), pgn);
3133 * All the children were made ok. Now cmtime contains the
3134 * modification time of the newest child, we need to find out
3135 * if we exist and when we were modified last. The criteria for
3136 * datedness are defined by the Make_OODate function.
3138 DEBUGF(MAKE, ("Examining %s...", gn->name));
3139 if (!Make_OODate(gn)) {
3140 gn->made = UPTODATE;
3141 DEBUGF(MAKE, ("up-to-date.\n"));
3144 DEBUGF(MAKE, ("out-of-date.\n"));
3148 * If the user is just seeing if something is out-of-date,
3149 * exit now to tell him/her "yes".
3156 * We need to be re-made. We also have to make sure we've got
3157 * a $? variable. To be nice, we also define the $> variable
3158 * using Make_DoAllVar().
3163 * Alter our type to tell if errors should be ignored or things
3164 * should not be printed so Compat_RunCommand knows what to do.
3166 if (Targ_Ignore(gn)) {
3167 gn->type |= OP_IGNORE;
3169 if (Targ_Silent(gn)) {
3170 gn->type |= OP_SILENT;
3173 if (Job_CheckCommands(gn, Fatal)) {
3175 * Our commands are ok, but we still have to worry
3176 * about the -t flag...
3180 LST_FOREACH(ln, &gn->commands) {
3181 if (Compat_RunCommand(Lst_Datum(ln), gn, ENDNode))
3186 Job_Touch(gn, gn->type & OP_SILENT);
3192 if (gn->made != ERROR) {
3194 * If the node was made successfully, mark it so, update
3195 * its modification time and timestamp all its parents.
3196 * Note that for .ZEROTIME targets, the timestamping
3197 * isn't done. This is to keep its state from affecting
3198 * that of its parent.
3203 * We can't re-stat the thing, but we can at least take
3204 * care of rules where a target depends on a source that
3205 * actually creates the target, but only if it has
3213 * mv y.tab.o parse.o
3214 * cmp -s y.tab.h parse.h || mv y.tab.h parse.h
3216 * In this case, if the definitions produced by yacc
3217 * haven't changed from before, parse.h won't have been
3218 * updated and gn->mtime will reflect the current
3219 * modification time for parse.h. This is something of a
3220 * kludge, I admit, but it's a useful one..
3222 * XXX: People like to use a rule like
3226 * To force things that depend on FRC to be made, so we
3227 * have to check for gn->children being empty as well...
3229 if (!Lst_IsEmpty(&gn->commands) ||
3230 Lst_IsEmpty(&gn->children)) {
3235 * This is what Make does and it's actually a good
3236 * thing, as it allows rules like
3238 * cmp -s y.tab.h parse.h || cp y.tab.h parse.h
3240 * to function as intended. Unfortunately, thanks to
3241 * the stateless nature of NFS (and the speed of this
3242 * program), there are times when the modification time
3243 * of a file created on a remote machine will not be
3244 * modified before the stat() implied by the Dir_MTime
3245 * occurs, thus leading us to believe that the file
3246 * is unchanged, wreaking havoc with files that depend
3249 * I have decided it is better to make too much than to
3250 * make too little, so this stuff is commented out
3251 * unless you're sure it's ok.
3254 if (noExecute || Dir_MTime(gn) == 0) {
3257 if (gn->cmtime > gn->mtime)
3258 gn->mtime = gn->cmtime;
3259 DEBUGF(MAKE, ("update time: %s\n",
3260 Targ_FmtTime(gn->mtime)));
3262 if (!(gn->type & OP_EXEC)) {
3263 pgn->childMade = TRUE;
3264 Make_TimeStamp(pgn, gn);
3267 } else if (keepgoing) {
3271 printf("\n\nStop in %s.\n", Var_Value(".CURDIR", gn));
3274 } else if (gn->made == ERROR) {
3276 * Already had an error when making this beastie. Tell the
3281 if (Lst_Member(&gn->iParents, pgn) != NULL) {
3282 Var_Set(IMPSRC, Var_Value(TARGET, gn), pgn);
3286 Error("Graph cycles through %s\n", gn->name);
3291 if ((gn->type & OP_EXEC) == 0) {
3292 pgn->childMade = TRUE;
3293 Make_TimeStamp(pgn, gn);
3297 if ((gn->type & OP_EXEC) == 0) {
3298 Make_TimeStamp(pgn, gn);
3310 * Start making given a list of target nodes. Returns what the exit
3311 * status of make should be.
3313 * @note Obviously some function we call is exiting since the code only
3314 * returns 0. We will fix that bug eventually.
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 ENDNode = Targ_FindNode(".END", TARG_CREATE);
3326 * If the user has defined a .BEGIN target, execute the commands
3329 if (queryFlag == FALSE) {
3330 gn = Targ_FindNode(".BEGIN", TARG_NOCREATE);
3332 LST_FOREACH(ln, &gn->commands) {
3333 if (Compat_RunCommand(Lst_Datum(ln), gn, ENDNode))
3336 if (gn->made == ERROR) {
3337 printf("\n\nStop.\n");
3340 * (queryFlag && outOfDate) ? 1 : 0 ->
3341 * (FALSE && TRUE) ? 1 : 0 ->
3342 * 0 Successful completion?
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))
3384 return (0); /* Successful completion */
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