2 * Copyright (c) 1988, 1989, 1990, 1993
3 * The Regents of the University of California. All rights reserved.
4 * Copyright (c) 1988, 1989 by Adam de Boor
5 * Copyright (c) 1989 by Berkeley Softworks
8 * This code is derived from software contributed to Berkeley by
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. All advertising materials mentioning features or use of this software
20 * must display the following acknowledgement:
21 * This product includes software developed by the University of
22 * California, Berkeley and its contributors.
23 * 4. Neither the name of the University nor the names of its contributors
24 * may be used to endorse or promote products derived from this software
25 * without specific prior written permission.
27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
30 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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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 1.107 2005/05/23 18:19:05 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"
143 #define TMPPAT "/tmp/makeXXXXXXXXXX"
144 #define MKLVL_MAXVAL 500
145 #define MKLVL_ENVVAR "__MKLVL__"
149 * The SEL_ constants determine the maximum amount of time spent in select
150 * before coming out to see if a child has finished. SEL_SEC is the number of
151 * seconds and SEL_USEC is the number of micro-seconds
155 #endif /* !USE_KQUEUE */
158 * Job Table definitions.
160 * The job "table" is kept as a linked Lst in 'jobs', with the number of
161 * active jobs maintained in the 'nJobs' variable. At no time will this
162 * exceed the value of 'maxJobs', initialized by the Job_Init function.
164 * When a job is finished, the Make_Update function is called on each of the
165 * parents of the node which was just remade. This takes care of the upward
166 * traversal of the dependency graph.
168 #define JOB_BUFSIZE 1024
170 pid_t pid; /* The child's process ID */
172 struct GNode *node; /* The target the child is making */
175 * A LstNode for the first command to be saved after the job completes.
176 * This is NULL if there was no "..." in the job's commands.
181 * An FILE* for writing out the commands. This is only
182 * used before the job is actually started.
187 * A word of flags which determine how the module handles errors,
188 * echoing, etc. for the job
190 short flags; /* Flags to control treatment of job */
191 #define JOB_IGNERR 0x001 /* Ignore non-zero exits */
192 #define JOB_SILENT 0x002 /* no output */
193 #define JOB_SPECIAL 0x004 /* Target is a special one. i.e. run it locally
194 * if we can't export it and maxLocal is 0 */
195 #define JOB_IGNDOTS 0x008 /* Ignore "..." lines when processing
197 #define JOB_FIRST 0x020 /* Job is first job for the node */
198 #define JOB_RESTART 0x080 /* Job needs to be completely restarted */
199 #define JOB_RESUME 0x100 /* Job needs to be resumed b/c it stopped,
201 #define JOB_CONTINUING 0x200 /* We are in the process of resuming this job.
202 * Used to avoid infinite recursion between
203 * JobFinish and JobRestart */
205 /* union for handling shell's output */
208 * This part is used when usePipes is true.
209 * The output is being caught via a pipe and the descriptors
210 * of our pipe, an array in which output is line buffered and
211 * the current position in that buffer are all maintained for
216 * Input side of pipe associated with
217 * job's output channel
222 * Output side of pipe associated with job's
228 * Buffer for storing the output of the
231 char op_outBuf[JOB_BUFSIZE + 1];
233 /* Current position in op_outBuf */
238 * If usePipes is false the output is routed to a temporary
239 * file and all that is kept is the name of the file and the
240 * descriptor open to the file.
243 /* Name of file to which shell output was rerouted */
244 char of_outFile[sizeof(TMPPAT)];
247 * Stream open to the output file. Used to funnel all
248 * from a single job to one file while still allowing
249 * multiple shell invocations
254 } output; /* Data for tracking a shell's output */
256 TAILQ_ENTRY(Job) link; /* list link */
259 #define outPipe output.o_pipe.op_outPipe
260 #define inPipe output.o_pipe.op_inPipe
261 #define outBuf output.o_pipe.op_outBuf
262 #define curPos output.o_pipe.op_curPos
263 #define outFile output.o_file.of_outFile
264 #define outFd output.o_file.of_outFd
266 TAILQ_HEAD(JobList, Job);
269 * error handling variables
271 static int errors = 0; /* number of errors reported */
272 static int aborting = 0; /* why is the make aborting? */
273 #define ABORT_ERROR 1 /* Because of an error */
274 #define ABORT_INTERRUPT 2 /* Because it was interrupted */
275 #define ABORT_WAIT 3 /* Waiting for jobs to finish */
278 * XXX: Avoid SunOS bug... FILENO() is fp->_file, and file
279 * is a char! So when we go above 127 we turn negative!
281 #define FILENO(a) ((unsigned)fileno(a))
284 * post-make command processing. The node postCommands is really just the
285 * .END target but we keep it around to avoid having to search for it
288 static GNode *postCommands;
291 * The number of commands actually printed for a target. Should this
292 * number be 0, no shell will be executed.
294 static int numCommands;
297 * Return values from JobStart.
299 #define JOB_RUNNING 0 /* Job is running */
300 #define JOB_ERROR 1 /* Error in starting the job */
301 #define JOB_FINISHED 2 /* The job is already finished */
302 #define JOB_STOPPED 3 /* The job is stopped */
305 * The maximum number of jobs that may run. This is initialize from the
306 * -j argument for the leading make and from the FIFO for sub-makes.
309 static int nJobs; /* The number of children currently running */
311 /* The structures that describe them */
312 static struct JobList jobs = TAILQ_HEAD_INITIALIZER(jobs);
314 static Boolean jobFull; /* Flag to tell when the job table is full. It
315 * is set TRUE when (1) the total number of
316 * running jobs equals the maximum allowed */
318 static int kqfd; /* File descriptor obtained by kqueue() */
320 static fd_set outputs; /* Set of descriptors of pipes connected to
321 * the output channels of children */
324 static GNode *lastNode; /* The node for which output was most recently
326 static const char *targFmt; /* Format string to use to head output from a
327 * job when it's not the most-recent job heard
330 #define TARG_FMT "--- %s ---\n" /* Default format */
331 #define MESSAGE(fp, gn) \
332 fprintf(fp, targFmt, gn->name);
335 * When JobStart attempts to run a job but isn't allowed to
336 * or when Job_CatchChildren detects a job that has
337 * been stopped somehow, the job is placed on the stoppedJobs queue to be run
338 * when the next job finishes.
340 * Lst of Job structures describing jobs that were stopped due to
341 * concurrency limits or externally
343 static struct JobList stoppedJobs = TAILQ_HEAD_INITIALIZER(stoppedJobs);
345 static int fifoFd; /* Fd of our job fifo */
346 static char fifoName[] = "/tmp/make_fifo_XXXXXXXXX";
347 static int fifoMaster;
349 static sig_atomic_t interrupted;
352 #if defined(USE_PGRP) && defined(SYSV)
353 # define KILL(pid, sig) killpg(-(pid), (sig))
355 # if defined(USE_PGRP)
356 # define KILL(pid, sig) killpg((pid), (sig))
358 # define KILL(pid, sig) kill((pid), (sig))
363 * Grmpf... There is no way to set bits of the wait structure
364 * anymore with the stupid W*() macros. I liked the union wait
365 * stuff much more. So, we devise our own macros... This is
366 * really ugly, use dramamine sparingly. You have been warned.
368 #define W_SETMASKED(st, val, fun) \
371 int mask = fun(sh); \
373 for (sh = 0; ((mask >> sh) & 1) == 0; sh++) \
375 *(st) = (*(st) & ~mask) | ((val) << sh); \
378 #define W_SETTERMSIG(st, val) W_SETMASKED(st, val, WTERMSIG)
379 #define W_SETEXITSTATUS(st, val) W_SETMASKED(st, val, WEXITSTATUS)
382 * Information used to create a new process.
384 typedef struct ProcStuff {
385 int in; /* stdin for new process */
386 int out; /* stdout for new process */
387 int err; /* stderr for new process */
389 int merge_errors; /* true if stderr is redirected to stdin */
390 int pgroup; /* true if new process a process leader */
391 int searchpath; /* true if binary should be found via $PATH */
394 int argv_free; /* release argv after use */
400 static void JobRestart(Job *);
401 static int JobStart(GNode *, int, Job *);
402 static void JobDoOutput(Job *, Boolean);
403 static void JobInterrupt(int, int);
404 static void JobRestartJobs(void);
405 static void ProcExec(const ProcStuff *) __dead2;
406 static int Compat_RunCommand(char *, struct GNode *);
408 static GNode *curTarg = NULL;
409 static GNode *ENDNode;
412 * Create a fifo file with a uniq filename, and returns a file
413 * descriptor to that fifo.
416 mkfifotemp(char *template)
421 const char padchar[] =
422 "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
424 if (template[0] == '\0') {
425 errno = EINVAL; /* bad input string */
429 /* Find end of template string. */
430 pathend = strchr(template, '\0');
434 * Starting from the end of the template replace spaces with 'X' in
435 * them with random characters until there are no more 'X'.
437 while (ptr >= template && *ptr == 'X') {
438 uint32_t rand_num = arc4random() % (sizeof(padchar) - 1);
439 *ptr-- = padchar[rand_num];
443 /* Check the target directory. */
444 for (; ptr > template; --ptr) {
449 if (stat(template, &sbuf) != 0)
452 if (!S_ISDIR(sbuf.st_mode)) {
462 if (mkfifo(template, 0600) == 0) {
465 if ((fd = open(template, O_RDWR, 0600)) < 0) {
472 if (errno != EEXIST) {
478 * If we have a collision, cycle through the space of
481 for (ptr = start;;) {
484 if (*ptr == '\0' || ptr == pathend)
487 pad = strchr(padchar, *ptr);
488 if (pad == NULL || *++pad == '\0') {
500 catch_child(int sig __unused)
505 * In lieu of a good way to prevent every possible looping in make(1), stop
506 * there from being more than MKLVL_MAXVAL processes forked by make(1), to
507 * prevent a forkbomb from happening, in a dumb and mechanical way.
510 * Creates or modifies enviornment variable MKLVL_ENVVAR via setenv().
513 check_make_level(void)
515 char *value = getenv(MKLVL_ENVVAR);
516 int level = (value == NULL) ? 0 : atoi(value);
519 errc(2, EAGAIN, "Invalid value for recursion level (%d).",
521 } else if (level > MKLVL_MAXVAL) {
522 errc(2, EAGAIN, "Max recursion level (%d) exceeded.",
526 sprintf(new_value, "%d", level + 1);
527 setenv(MKLVL_ENVVAR, new_value, 1);
537 * Catch SIGCHLD so that we get kicked out of select() when we
538 * need to look at a child. This is only known to matter for the
539 * -j case (perhaps without -P).
541 * XXX this is intentionally misplaced.
545 sigemptyset(&sa.sa_mask);
546 sa.sa_flags = SA_RESTART | SA_NOCLDSTOP;
547 sa.sa_handler = catch_child;
548 sigaction(SIGCHLD, &sa, NULL);
554 * get rid of resource limit on file descriptors
558 if (getrlimit(RLIMIT_NOFILE, &rl) == -1) {
561 rl.rlim_cur = rl.rlim_max;
562 if (setrlimit(RLIMIT_NOFILE, &rl) == -1) {
570 * Turn off ENV to make ksh happier.
577 * Replace the current process.
580 ProcExec(const ProcStuff *ps)
582 if (ps->in != STDIN_FILENO) {
584 * Redirect the child's stdin to the input fd
585 * and reset it to the beginning (again).
587 if (dup2(ps->in, STDIN_FILENO) == -1)
588 Punt("Cannot dup2: %s", strerror(errno));
589 lseek(STDIN_FILENO, (off_t)0, SEEK_SET);
592 if (ps->out != STDOUT_FILENO) {
594 * Redirect the child's stdout to the output fd.
596 if (dup2(ps->out, STDOUT_FILENO) == -1)
597 Punt("Cannot dup2: %s", strerror(errno));
601 if (ps->err != STDERR_FILENO) {
603 * Redirect the child's stderr to the err fd.
605 if (dup2(ps->err, STDERR_FILENO) == -1)
606 Punt("Cannot dup2: %s", strerror(errno));
610 if (ps->merge_errors) {
612 * Send stderr to parent process too.
614 if (dup2(STDOUT_FILENO, STDERR_FILENO) == -1)
615 Punt("Cannot dup2: %s", strerror(errno));
619 * The file descriptors for stdin, stdout, or stderr might
620 * have been marked close-on-exec. Clear the flag on all
623 fcntl(STDIN_FILENO, F_SETFD,
624 fcntl(STDIN_FILENO, F_GETFD) & (~FD_CLOEXEC));
625 fcntl(STDOUT_FILENO, F_SETFD,
626 fcntl(STDOUT_FILENO, F_GETFD) & (~FD_CLOEXEC));
627 fcntl(STDERR_FILENO, F_SETFD,
628 fcntl(STDERR_FILENO, F_GETFD) & (~FD_CLOEXEC));
633 * Become a process group leader, so we can kill it and all
634 * its descendants in one fell swoop, by killing its process
635 * family, but not commit suicide.
640 setpgid(0, getpid());
642 #endif /* USE_PGRP */
645 if (ps->searchpath) {
646 execvp(ps->argv[0], ps->argv);
648 write(STDERR_FILENO, ps->argv[0], strlen(ps->argv[0]));
649 write(STDERR_FILENO, ":", 1);
650 write(STDERR_FILENO, strerror(errno), strlen(strerror(errno)));
651 write(STDERR_FILENO, "\n", 1);
653 execv(commandShell->path, ps->argv);
656 "Could not execute shell\n",
657 sizeof("Could not execute shell"));
661 * Since we are the child process, exit without flushing buffers.
667 * Wait for child process to terminate.
670 ProcWait(ProcStuff *ps)
676 * Wait for the process to exit.
679 pid = waitpid(ps->child_pid, &status, 0);
680 if (pid == -1 && errno != EINTR) {
681 Fatal("error in wait: %d", pid);
684 if (pid == ps->child_pid) {
697 * Got a signal. Set global variables and hope that someone will
701 JobCatchSig(int signo)
709 * Pass a signal on to all local jobs if
710 * USE_PGRP is defined, then die ourselves.
713 * We die by the same signal.
716 JobPassSig(int signo)
719 sigset_t nmask, omask;
720 struct sigaction act;
723 sigaddset(&nmask, signo);
724 sigprocmask(SIG_SETMASK, &nmask, &omask);
726 DEBUGF(JOB, ("JobPassSig(%d) called.\n", signo));
727 TAILQ_FOREACH(job, &jobs, link) {
728 DEBUGF(JOB, ("JobPassSig passing signal %d to child %jd.\n",
729 signo, (intmax_t)job->pid));
730 KILL(job->pid, signo);
734 * Deal with proper cleanup based on the signal received. We only run
735 * the .INTERRUPT target if the signal was in fact an interrupt.
736 * The other three termination signals are more of a "get out *now*"
739 if (signo == SIGINT) {
740 JobInterrupt(TRUE, signo);
741 } else if (signo == SIGHUP || signo == SIGTERM || signo == SIGQUIT) {
742 JobInterrupt(FALSE, signo);
746 * Leave gracefully if SIGQUIT, rather than core dumping.
748 if (signo == SIGQUIT) {
753 * Send ourselves the signal now we've given the message to everyone
754 * else. Note we block everything else possible while we're getting
755 * the signal. This ensures that all our jobs get continued when we
756 * wake up before we take any other signal.
757 * XXX this comment seems wrong.
759 act.sa_handler = SIG_DFL;
760 sigemptyset(&act.sa_mask);
762 sigaction(signo, &act, NULL);
764 DEBUGF(JOB, ("JobPassSig passing signal to self, mask = %x.\n",
765 ~0 & ~(1 << (signo - 1))));
766 signal(signo, SIG_DFL);
768 KILL(getpid(), signo);
771 TAILQ_FOREACH(job, &jobs, link) {
772 DEBUGF(JOB, ("JobPassSig passing signal %d to child %jd.\n",
773 signo, (intmax_t)job->pid));
774 KILL(job->pid, signo);
777 sigprocmask(SIG_SETMASK, &omask, NULL);
778 sigprocmask(SIG_SETMASK, &omask, NULL);
779 act.sa_handler = JobPassSig;
780 sigaction(signo, &act, NULL);
785 * Put out another command for the given job. If the command starts
786 * with an @ or a - we process it specially. In the former case,
787 * so long as the -s and -n flags weren't given to make, we stick
788 * a shell-specific echoOff command in the script. In the latter,
789 * we ignore errors for the entire job, unless the shell has error
791 * If the command is just "..." we take all future commands for this
792 * job to be commands to be executed once the entire graph has been
793 * made and return non-zero to signal that the end of the commands
794 * was reached. These commands are later attached to the postCommands
795 * node and executed by Job_Finish when all things are done.
796 * This function is called from JobStart via LST_FOREACH.
799 * Always 0, unless the command was "..."
802 * If the command begins with a '-' and the shell has no error control,
803 * the JOB_IGNERR flag is set in the job descriptor.
804 * If the command is "..." and we're not ignoring such things,
805 * tailCmds is set to the successor node of the cmd.
806 * numCommands is incremented if the command is actually printed.
809 JobPrintCommand(char *cmd, Job *job)
811 Boolean noSpecials; /* true if we shouldn't worry about
812 * inserting special commands into
813 * the input stream. */
814 Boolean shutUp = FALSE; /* true if we put a no echo command
815 * into the command file */
816 Boolean errOff = FALSE; /* true if we turned error checking
817 * off before printing the command
818 * and need to turn it back on */
819 const char *cmdTemplate;/* Template to use when printing the command */
820 char *cmdStart; /* Start of expanded command */
821 LstNode *cmdNode; /* Node for replacing the command */
823 noSpecials = (noExecute && !(job->node->type & OP_MAKE));
825 if (strcmp(cmd, "...") == 0) {
826 job->node->type |= OP_SAVE_CMDS;
827 if ((job->flags & JOB_IGNDOTS) == 0) {
829 Lst_Succ(Lst_Member(&job->node->commands, cmd));
835 #define DBPRINTF(fmt, arg) \
836 DEBUGF(JOB, (fmt, arg)); \
837 fprintf(job->cmdFILE, fmt, arg); \
838 fflush(job->cmdFILE);
843 * For debugging, we replace each command with the result of expanding
844 * the variables in the command.
846 cmdNode = Lst_Member(&job->node->commands, cmd);
848 cmd = Buf_Peel(Var_Subst(cmd, job->node, FALSE));
851 Lst_Replace(cmdNode, cmdStart);
853 cmdTemplate = "%s\n";
856 * Check for leading @', -' or +'s to control echoing, error checking,
857 * and execution on -n.
859 while (*cmd == '@' || *cmd == '-' || *cmd == '+') {
863 shutUp = DEBUG(LOUD) ? FALSE : TRUE;
873 * We're not actually exececuting anything...
874 * but this one needs to be - use compat mode
877 Compat_RunCommand(cmd, job->node);
885 while (isspace((unsigned char)*cmd))
889 if (!(job->flags & JOB_SILENT) && !noSpecials &&
890 commandShell->hasEchoCtl) {
891 DBPRINTF("%s\n", commandShell->echoOff);
898 if (!(job->flags & JOB_IGNERR) && !noSpecials) {
899 if (commandShell->hasErrCtl) {
901 * We don't want the error-control commands
902 * showing up either, so we turn off echoing
903 * while executing them. We could put another
904 * field in the shell structure to tell
905 * JobDoOutput to look for this string too,
906 * but why make it any more complex than
909 if (!(job->flags & JOB_SILENT) && !shutUp &&
910 commandShell->hasEchoCtl) {
911 DBPRINTF("%s\n", commandShell->echoOff);
912 DBPRINTF("%s\n", commandShell->ignErr);
913 DBPRINTF("%s\n", commandShell->echoOn);
915 DBPRINTF("%s\n", commandShell->ignErr);
917 } else if (commandShell->ignErr &&
918 *commandShell->ignErr != '\0') {
920 * The shell has no error control, so we need to
921 * be weird to get it to ignore any errors from
922 * the command. If echoing is turned on, we turn
923 * it off and use the errCheck template to echo
924 * the command. Leave echoing off so the user
925 * doesn't see the weirdness we go through to
926 * ignore errors. Set cmdTemplate to use the
927 * weirdness instead of the simple "%s\n"
930 if (!(job->flags & JOB_SILENT) && !shutUp &&
931 commandShell->hasEchoCtl) {
932 DBPRINTF("%s\n", commandShell->echoOff);
933 DBPRINTF(commandShell->errCheck, cmd);
936 cmdTemplate = commandShell->ignErr;
938 * The error ignoration (hee hee) is already
939 * taken care of by the ignErr template, so
940 * pretend error checking is still on.
951 DBPRINTF(cmdTemplate, cmd);
955 * If echoing is already off, there's no point in issuing the
956 * echoOff command. Otherwise we issue it and pretend it was on
957 * for the whole command...
959 if (!shutUp && !(job->flags & JOB_SILENT) &&
960 commandShell->hasEchoCtl) {
961 DBPRINTF("%s\n", commandShell->echoOff);
964 DBPRINTF("%s\n", commandShell->errCheck);
967 DBPRINTF("%s\n", commandShell->echoOn);
974 * Called to close both input and output pipes when a job is finished.
977 * The file descriptors associated with the job are closed.
984 #if !defined(USE_KQUEUE)
985 FD_CLR(job->inPipe, &outputs);
987 if (job->outPipe != job->inPipe) {
990 JobDoOutput(job, TRUE);
994 JobDoOutput(job, TRUE);
1000 * Do final processing for the given job including updating
1001 * parents and starting new jobs as available/necessary. Note
1002 * that we pay no attention to the JOB_IGNERR flag here.
1003 * This is because when we're called because of a noexecute flag
1004 * or something, jstat.w_status is 0 and when called from
1005 * Job_CatchChildren, the status is zeroed if it s/b ignored.
1008 * Some nodes may be put on the toBeMade queue.
1009 * Final commands for the job are placed on postCommands.
1011 * If we got an error and are aborting (aborting == ABORT_ERROR) and
1012 * the job list is now empty, we are done for the day.
1013 * If we recognized an error (errors !=0), we set the aborting flag
1014 * to ABORT_ERROR so no more jobs will be started.
1017 JobFinish(Job *job, int *status)
1022 if (WIFEXITED(*status)) {
1023 int job_status = WEXITSTATUS(*status);
1027 * Deal with ignored errors in -B mode. We need to
1028 * print a message telling of the ignored error as
1029 * well as setting status.w_status to 0 so the next
1030 * command gets run. To do this, we set done to be
1031 * TRUE if in -B mode and the job exited non-zero.
1033 if (job_status == 0) {
1036 if (job->flags & JOB_IGNERR) {
1040 * If it exited non-zero and either we're
1041 * doing things our way or we're not ignoring
1042 * errors, the job is finished. Similarly, if
1043 * the shell died because of a signal the job
1044 * is also finished. In these cases, finish
1045 * out the job's output before printing the
1049 if (job->cmdFILE != NULL &&
1050 job->cmdFILE != stdout) {
1051 fclose(job->cmdFILE);
1056 } else if (WIFSIGNALED(*status)) {
1057 if (WTERMSIG(*status) == SIGCONT) {
1059 * No need to close things down or anything.
1064 * If it exited non-zero and either we're
1065 * doing things our way or we're not ignoring
1066 * errors, the job is finished. Similarly, if
1067 * the shell died because of a signal the job
1068 * is also finished. In these cases, finish
1069 * out the job's output before printing the
1073 if (job->cmdFILE != NULL &&
1074 job->cmdFILE != stdout) {
1075 fclose(job->cmdFILE);
1081 * No need to close things down or anything.
1086 if (WIFEXITED(*status)) {
1087 if (done || DEBUG(JOB)) {
1092 (job->flags & JOB_IGNERR)) {
1094 * If output is going to a file and this job
1095 * is ignoring errors, arrange to have the
1096 * exit status sent to the output file as
1099 out = fdopen(job->outFd, "w");
1101 Punt("Cannot fdopen");
1106 DEBUGF(JOB, ("Process %jd exited.\n",
1107 (intmax_t)job->pid));
1109 if (WEXITSTATUS(*status) == 0) {
1111 if (usePipes && job->node != lastNode) {
1112 MESSAGE(out, job->node);
1113 lastNode = job->node;
1116 "*** Completed successfully\n");
1119 if (usePipes && job->node != lastNode) {
1120 MESSAGE(out, job->node);
1121 lastNode = job->node;
1123 fprintf(out, "*** Error code %d%s\n",
1124 WEXITSTATUS(*status),
1125 (job->flags & JOB_IGNERR) ?
1128 if (job->flags & JOB_IGNERR) {
1135 } else if (WIFSIGNALED(*status)) {
1136 if (done || DEBUG(JOB) || (WTERMSIG(*status) == SIGCONT)) {
1141 (job->flags & JOB_IGNERR)) {
1143 * If output is going to a file and this job
1144 * is ignoring errors, arrange to have the
1145 * exit status sent to the output file as
1148 out = fdopen(job->outFd, "w");
1150 Punt("Cannot fdopen");
1155 if (WTERMSIG(*status) == SIGCONT) {
1157 * If the beastie has continued, shift the
1158 * Job from the stopped list to the running
1159 * one (or re-stop it if concurrency is
1160 * exceeded) and go and get another child.
1162 if (job->flags & (JOB_RESUME | JOB_RESTART)) {
1163 if (usePipes && job->node != lastNode) {
1164 MESSAGE(out, job->node);
1165 lastNode = job->node;
1167 fprintf(out, "*** Continued\n");
1169 if (!(job->flags & JOB_CONTINUING)) {
1170 DEBUGF(JOB, ("Warning: process %jd was not "
1171 "continuing.\n", (intmax_t) job->pid));
1174 * We don't really want to restart a
1175 * job from scratch just because it
1176 * continued, especially not without
1177 * killing the continuing process!
1178 * That's why this is ifdef'ed out.
1184 job->flags &= ~JOB_CONTINUING;
1185 TAILQ_INSERT_TAIL(&jobs, job, link);
1187 DEBUGF(JOB, ("Process %jd is continuing locally.\n",
1188 (intmax_t) job->pid));
1189 if (nJobs == maxJobs) {
1191 DEBUGF(JOB, ("Job queue is full.\n"));
1197 if (usePipes && job->node != lastNode) {
1198 MESSAGE(out, job->node);
1199 lastNode = job->node;
1202 "*** Signal %d\n", WTERMSIG(*status));
1210 if (compatMake && !usePipes && (job->flags & JOB_IGNERR)) {
1212 * If output is going to a file and this job
1213 * is ignoring errors, arrange to have the
1214 * exit status sent to the output file as
1217 out = fdopen(job->outFd, "w");
1219 Punt("Cannot fdopen");
1224 DEBUGF(JOB, ("Process %jd stopped.\n", (intmax_t) job->pid));
1225 if (usePipes && job->node != lastNode) {
1226 MESSAGE(out, job->node);
1227 lastNode = job->node;
1229 fprintf(out, "*** Stopped -- signal %d\n", WSTOPSIG(*status));
1230 job->flags |= JOB_RESUME;
1231 TAILQ_INSERT_TAIL(&stoppedJobs, job, link);
1237 * Now handle the -B-mode stuff. If the beast still isn't finished,
1238 * try and restart the job on the next command. If JobStart says it's
1239 * ok, it's ok. If there's an error, this puppy is done.
1241 if (compatMake && WIFEXITED(*status) &&
1242 Lst_Succ(job->node->compat_command) != NULL) {
1243 switch (JobStart(job->node, job->flags & JOB_IGNDOTS, job)) {
1249 W_SETEXITSTATUS(status, 1);
1253 * If we got back a JOB_FINISHED code, JobStart has
1254 * already called Make_Update and freed the job
1255 * descriptor. We set done to false here to avoid fake
1256 * cycles and double frees. JobStart needs to do the
1257 * update so we can proceed up the graph when given
1269 if (done && aborting != ABORT_ERROR &&
1270 aborting != ABORT_INTERRUPT && *status == 0) {
1272 * As long as we aren't aborting and the job didn't return a
1273 * non-zero status that we shouldn't ignore, we call
1274 * Make_Update to update the parents. In addition, any saved
1275 * commands for the node are placed on the .END target.
1277 for (ln = job->tailCmds; ln != NULL; ln = LST_NEXT(ln)) {
1278 Lst_AtEnd(&postCommands->commands,
1280 Var_Subst(Lst_Datum(ln), job->node, FALSE)));
1283 job->node->made = MADE;
1284 Make_Update(job->node);
1287 } else if (*status != 0) {
1295 * Set aborting if any error.
1297 if (errors && !keepgoing && aborting != ABORT_INTERRUPT) {
1299 * If we found any errors in this batch of children and the -k
1300 * flag wasn't given, we set the aborting flag so no more jobs
1303 aborting = ABORT_ERROR;
1306 if (aborting == ABORT_ERROR && Job_Empty()) {
1308 * If we are aborting and the job table is now empty, we finish.
1316 * Touch the given target. Called by JobStart when the -t flag was
1317 * given. Prints messages unless told to be silent.
1320 * The data modification of the file is changed. In addition, if the
1321 * file did not exist, it is created.
1324 Job_Touch(GNode *gn, Boolean silent)
1326 int streamID; /* ID of stream opened to do the touch */
1327 struct utimbuf times; /* Times for utime() call */
1329 if (gn->type & (OP_JOIN | OP_USE | OP_EXEC | OP_OPTIONAL)) {
1331 * .JOIN, .USE, .ZEROTIME and .OPTIONAL targets are "virtual"
1332 * targets and, as such, shouldn't really be created.
1338 fprintf(stdout, "touch %s\n", gn->name);
1346 if (gn->type & OP_ARCHV) {
1348 } else if (gn->type & OP_LIB) {
1351 char *file = gn->path ? gn->path : gn->name;
1353 times.actime = times.modtime = now;
1354 if (utime(file, ×) < 0) {
1355 streamID = open(file, O_RDWR | O_CREAT, 0666);
1357 if (streamID >= 0) {
1361 * Read and write a byte to the file to change
1362 * the modification time, then close the file.
1364 if (read(streamID, &c, 1) == 1) {
1365 lseek(streamID, (off_t)0, SEEK_SET);
1366 write(streamID, &c, 1);
1371 fprintf(stdout, "*** couldn't touch %s: %s",
1372 file, strerror(errno));
1381 * Make sure the given node has all the commands it needs.
1384 * TRUE if the commands list is/was ok.
1387 * The node will have commands from the .DEFAULT rule added to it
1391 Job_CheckCommands(GNode *gn, void (*abortProc)(const char *, ...))
1394 if (OP_NOP(gn->type) && Lst_IsEmpty(&gn->commands) &&
1395 (gn->type & OP_LIB) == 0) {
1397 * No commands. Look for .DEFAULT rule from which we might infer
1400 if (DEFAULT != NULL && !Lst_IsEmpty(&DEFAULT->commands)) {
1402 * Make only looks for a .DEFAULT if the node was
1403 * never the target of an operator, so that's what we
1404 * do too. If a .DEFAULT was given, we substitute its
1405 * commands for gn's commands and set the IMPSRC
1406 * variable to be the target's name The DEFAULT node
1407 * acts like a transformation rule, in that gn also
1408 * inherits any attributes or sources attached to
1411 Make_HandleUse(DEFAULT, gn);
1412 Var_Set(IMPSRC, Var_Value(TARGET, gn), gn);
1414 } else if (Dir_MTime(gn) == 0) {
1416 * The node wasn't the target of an operator we have
1417 * no .DEFAULT rule to go on and the target doesn't
1418 * already exist. There's nothing more we can do for
1419 * this branch. If the -k flag wasn't given, we stop
1420 * in our tracks, otherwise we just don't update
1421 * this node's parents so they never get examined.
1423 static const char msg[] =
1424 "make: don't know how to make";
1426 if (gn->type & OP_OPTIONAL) {
1427 fprintf(stdout, "%s %s(ignored)\n",
1430 } else if (keepgoing) {
1431 fprintf(stdout, "%s %s(continuing)\n",
1437 if (strcmp(gn->name,"love") == 0)
1438 (*abortProc)("Not war.");
1441 (*abortProc)("%s %s. Stop",
1452 * Execute the shell for the given job. Called from JobStart and
1456 * A shell is executed, outputs is altered and the Job structure added
1460 JobExec(Job *job, char **argv)
1467 DEBUGF(JOB, ("Running %s\n", job->node->name));
1468 DEBUGF(JOB, ("\tCommand: "));
1469 for (i = 0; argv[i] != NULL; i++) {
1470 DEBUGF(JOB, ("%s ", argv[i]));
1472 DEBUGF(JOB, ("\n"));
1476 * Some jobs produce no output and it's disconcerting to have
1477 * no feedback of their running (since they produce no output, the
1478 * banner with their name in it never appears). This is an attempt to
1479 * provide that feedback, even if nothing follows it.
1481 if (lastNode != job->node && (job->flags & JOB_FIRST) &&
1482 !(job->flags & JOB_SILENT)) {
1483 MESSAGE(stdout, job->node);
1484 lastNode = job->node;
1487 ps.in = FILENO(job->cmdFILE);
1490 * Set up the child's output to be routed through the
1491 * pipe we've created for it.
1493 ps.out = job->outPipe;
1496 * We're capturing output in a file, so we duplicate
1497 * the descriptor to the temporary file into the
1500 ps.out = job->outFd;
1502 ps.err = STDERR_FILENO;
1504 ps.merge_errors = 1;
1512 * Fork. Warning since we are doing vfork() instead of fork(),
1513 * do not allocate memory in the child process!
1515 if ((ps.child_pid = vfork()) == -1) {
1516 Punt("Cannot fork");
1518 } else if (ps.child_pid == 0) {
1532 job->pid = ps.child_pid;
1534 if (usePipes && (job->flags & JOB_FIRST)) {
1536 * The first time a job is run for a node, we set the
1537 * current position in the buffer to the beginning and
1538 * mark another stream to watch in the outputs mask.
1541 struct kevent kev[2];
1545 #if defined(USE_KQUEUE)
1546 EV_SET(&kev[0], job->inPipe, EVFILT_READ, EV_ADD, 0, 0, job);
1547 EV_SET(&kev[1], job->pid, EVFILT_PROC,
1548 EV_ADD | EV_ONESHOT, NOTE_EXIT, 0, NULL);
1549 if (kevent(kqfd, kev, 2, NULL, 0, NULL) != 0) {
1551 * kevent() will fail if the job is already
1554 if (errno != EINTR && errno != EBADF && errno != ESRCH)
1555 Punt("kevent: %s", strerror(errno));
1558 FD_SET(job->inPipe, &outputs);
1559 #endif /* USE_KQUEUE */
1562 if (job->cmdFILE != NULL && job->cmdFILE != stdout) {
1563 fclose(job->cmdFILE);
1564 job->cmdFILE = NULL;
1568 * Now the job is actually running, add it to the table.
1571 TAILQ_INSERT_TAIL(&jobs, job, link);
1572 if (nJobs == maxJobs) {
1580 * Create the argv needed to execute the shell for a given job.
1583 JobMakeArgv(Job *job, char **argv)
1586 static char args[10]; /* For merged arguments */
1588 argv[0] = commandShell->name;
1591 if ((commandShell->exit && *commandShell->exit != '-') ||
1592 (commandShell->echo && *commandShell->echo != '-')) {
1594 * At least one of the flags doesn't have a minus before it, so
1595 * merge them together. Have to do this because the *(&(@*#*&#$#
1596 * Bourne shell thinks its second argument is a file to source.
1597 * Grrrr. Note the ten-character limitation on the combined
1600 sprintf(args, "-%s%s", (job->flags & JOB_IGNERR) ? "" :
1601 commandShell->exit ? commandShell->exit : "",
1602 (job->flags & JOB_SILENT) ? "" :
1603 commandShell->echo ? commandShell->echo : "");
1610 if (!(job->flags & JOB_IGNERR) && commandShell->exit) {
1611 argv[argc] = commandShell->exit;
1614 if (!(job->flags & JOB_SILENT) && commandShell->echo) {
1615 argv[argc] = commandShell->echo;
1624 * Restart a job that stopped for some reason. The job must be neither
1625 * on the jobs nor on the stoppedJobs list.
1628 * jobFull will be set if the job couldn't be run.
1631 JobRestart(Job *job)
1634 if (job->flags & JOB_RESTART) {
1636 * Set up the control arguments to the shell. This is based on
1637 * the flags set earlier for this job. If the JOB_IGNERR flag
1638 * is clear, the 'exit' flag of the commandShell is used to
1639 * cause it to exit upon receiving an error. If the JOB_SILENT
1640 * flag is clear, the 'echo' flag of the commandShell is used
1641 * to get it to start echoing as soon as it starts
1642 * processing commands.
1646 JobMakeArgv(job, argv);
1648 DEBUGF(JOB, ("Restarting %s...", job->node->name));
1649 if (nJobs >= maxJobs && !(job->flags & JOB_SPECIAL)) {
1651 * Not allowed to run -- put it back on the hold
1652 * queue and mark the table full
1654 DEBUGF(JOB, ("holding\n"));
1655 TAILQ_INSERT_HEAD(&stoppedJobs, job, link);
1657 DEBUGF(JOB, ("Job queue is full.\n"));
1661 * Job may be run locally.
1663 DEBUGF(JOB, ("running locally\n"));
1669 * The job has stopped and needs to be restarted.
1670 * Why it stopped, we don't know...
1672 DEBUGF(JOB, ("Resuming %s...", job->node->name));
1673 if ((nJobs < maxJobs || ((job->flags & JOB_SPECIAL) &&
1674 maxJobs == 0)) && nJobs != maxJobs) {
1676 * If we haven't reached the concurrency limit already
1677 * (or the job must be run and maxJobs is 0), it's ok
1683 error = (KILL(job->pid, SIGCONT) != 0);
1687 * Make sure the user knows we've continued
1688 * the beast and actually put the thing in the
1691 job->flags |= JOB_CONTINUING;
1693 W_SETTERMSIG(&status, SIGCONT);
1694 JobFinish(job, &status);
1696 job->flags &= ~(JOB_RESUME|JOB_CONTINUING);
1697 DEBUGF(JOB, ("done\n"));
1699 Error("couldn't resume %s: %s",
1700 job->node->name, strerror(errno));
1702 W_SETEXITSTATUS(&status, 1);
1703 JobFinish(job, &status);
1707 * Job cannot be restarted. Mark the table as full and
1708 * place the job back on the list of stopped jobs.
1710 DEBUGF(JOB, ("table full\n"));
1711 TAILQ_INSERT_HEAD(&stoppedJobs, job, link);
1713 DEBUGF(JOB, ("Job queue is full.\n"));
1720 * Start a target-creation process going for the target described
1721 * by the graph node gn.
1724 * JOB_ERROR if there was an error in the commands, JOB_FINISHED
1725 * if there isn't actually anything left to do for the job and
1726 * JOB_RUNNING if the job has been started.
1729 * A new Job node is created and added to the list of running
1730 * jobs. PMake is forked and a child shell created.
1733 JobStart(GNode *gn, int flags, Job *previous)
1735 Job *job; /* new job descriptor */
1736 char *argv[4]; /* Argument vector to shell */
1737 Boolean cmdsOK; /* true if the nodes commands were all right */
1738 Boolean noExec; /* Set true if we decide not to run the job */
1739 int tfd; /* File descriptor for temp file */
1741 char tfile[sizeof(TMPPAT)];
1744 JobPassSig(interrupted);
1747 if (previous != NULL) {
1748 previous->flags &= ~(JOB_FIRST | JOB_IGNERR | JOB_SILENT);
1751 job = emalloc(sizeof(Job));
1756 job->tailCmds = NULL;
1759 * Set the initial value of the flags for this job based on the global
1760 * ones and the node's attributes... Any flags supplied by the caller
1761 * are also added to the field.
1764 if (Targ_Ignore(gn)) {
1765 job->flags |= JOB_IGNERR;
1767 if (Targ_Silent(gn)) {
1768 job->flags |= JOB_SILENT;
1770 job->flags |= flags;
1773 * Check the commands now so any attributes from .DEFAULT have a chance
1774 * to migrate to the node.
1776 if (!compatMake && (job->flags & JOB_FIRST)) {
1777 cmdsOK = Job_CheckCommands(gn, Error);
1783 * If the -n flag wasn't given, we open up OUR (not the child's)
1784 * temporary file to stuff commands in it. The thing is rd/wr so we
1785 * don't need to reopen it to feed it to the shell. If the -n flag
1786 * *was* given, we just set the file to be stdout. Cute, huh?
1788 if ((gn->type & OP_MAKE) || (!noExecute && !touchFlag)) {
1790 * We're serious here, but if the commands were bogus, we're
1797 strcpy(tfile, TMPPAT);
1798 if ((tfd = mkstemp(tfile)) == -1)
1799 Punt("Cannot create temp file: %s", strerror(errno));
1800 job->cmdFILE = fdopen(tfd, "w+");
1802 if (job->cmdFILE == NULL) {
1804 Punt("Could not open %s", tfile);
1806 fcntl(FILENO(job->cmdFILE), F_SETFD, 1);
1808 * Send the commands to the command file, flush all its
1809 * buffers then rewind and remove the thing.
1814 * Used to be backwards; replace when start doing multiple
1815 * commands per shell.
1819 * Be compatible: If this is the first time for this
1820 * node, verify its commands are ok and open the
1821 * commands list for sequential access by later
1822 * invocations of JobStart. Once that is done, we take
1823 * the next command off the list and print it to the
1824 * command file. If the command was an ellipsis, note
1825 * that there's nothing more to execute.
1827 if (job->flags & JOB_FIRST)
1828 gn->compat_command = Lst_First(&gn->commands);
1830 gn->compat_command =
1831 Lst_Succ(gn->compat_command);
1833 if (gn->compat_command == NULL ||
1834 JobPrintCommand(Lst_Datum(gn->compat_command), job))
1837 if (noExec && !(job->flags & JOB_FIRST)) {
1839 * If we're not going to execute anything, the
1840 * job is done and we need to close down the
1841 * various file descriptors we've opened for
1842 * output, then call JobDoOutput to catch the
1843 * final characters or send the file to the
1844 * screen... Note that the i/o streams are only
1845 * open if this isn't the first job. Note also
1846 * that this could not be done in
1847 * Job_CatchChildren b/c it wasn't clear if
1848 * there were more commands to execute or not...
1854 * We can do all the commands at once. hooray for sanity
1857 LST_FOREACH(ln, &gn->commands) {
1858 if (JobPrintCommand(Lst_Datum(ln), job))
1863 * If we didn't print out any commands to the shell
1864 * script, there's not much point in executing the
1867 if (numCommands == 0) {
1872 } else if (noExecute) {
1874 * Not executing anything -- just print all the commands to
1875 * stdout in one fell swoop. This will still set up
1876 * job->tailCmds correctly.
1878 if (lastNode != gn) {
1879 MESSAGE(stdout, gn);
1882 job->cmdFILE = stdout;
1885 * Only print the commands if they're ok, but don't die if
1886 * they're not -- just let the user know they're bad and keep
1887 * going. It doesn't do any harm in this case and may do
1891 LST_FOREACH(ln, &gn->commands) {
1892 if (JobPrintCommand(Lst_Datum(ln), job))
1897 * Don't execute the shell, thank you.
1903 * Just touch the target and note that no shell should be
1904 * executed. Set cmdFILE to stdout to make life easier. Check
1905 * the commands, too, but don't die if they're no good -- it
1906 * does no harm to keep working up the graph.
1908 job->cmdFILE = stdout;
1909 Job_Touch(gn, job->flags & JOB_SILENT);
1914 * If we're not supposed to execute a shell, don't.
1918 * Unlink and close the command file if we opened one
1920 if (job->cmdFILE != stdout) {
1921 if (job->cmdFILE != NULL)
1922 fclose(job->cmdFILE);
1928 * We only want to work our way up the graph if we aren't here
1929 * because the commands for the job were no good.
1932 if (aborting == 0) {
1933 for (ln = job->tailCmds; ln != NULL;
1934 ln = LST_NEXT(ln)) {
1935 Lst_AtEnd(&postCommands->commands,
1936 Buf_Peel(Var_Subst(Lst_Datum(ln),
1937 job->node, FALSE)));
1939 job->node->made = MADE;
1940 Make_Update(job->node);
1943 return(JOB_FINISHED);
1949 fflush(job->cmdFILE);
1953 * Set up the control arguments to the shell. This is based on the flags
1954 * set earlier for this job.
1956 JobMakeArgv(job, argv);
1959 * If we're using pipes to catch output, create the pipe by which we'll
1960 * get the shell's output. If we're using files, print out that we're
1961 * starting a job and then set up its temporary-file name.
1963 if (!compatMake || (job->flags & JOB_FIRST)) {
1968 Punt("Cannot create pipe: %s", strerror(errno));
1969 job->inPipe = fd[0];
1970 job->outPipe = fd[1];
1971 fcntl(job->inPipe, F_SETFD, 1);
1972 fcntl(job->outPipe, F_SETFD, 1);
1974 fprintf(stdout, "Remaking `%s'\n", gn->name);
1976 strcpy(job->outFile, TMPPAT);
1977 if ((job->outFd = mkstemp(job->outFile)) == -1)
1978 Punt("cannot create temp file: %s",
1980 fcntl(job->outFd, F_SETFD, 1);
1984 if (nJobs >= maxJobs && !(job->flags & JOB_SPECIAL) && maxJobs != 0) {
1986 * We've hit the limit of concurrency, so put the job on hold
1987 * until some other job finishes. Note that the special jobs
1988 * (.BEGIN, .INTERRUPT and .END) may be run even when the
1989 * limit has been reached (e.g. when maxJobs == 0).
1993 DEBUGF(JOB, ("Can only run job locally.\n"));
1994 job->flags |= JOB_RESTART;
1995 TAILQ_INSERT_TAIL(&stoppedJobs, job, link);
1997 if (nJobs >= maxJobs) {
1999 * If we're running this job as a special case
2000 * (see above), at least say the table is full.
2003 DEBUGF(JOB, ("Local job queue is full.\n"));
2007 return (JOB_RUNNING);
2011 JobOutput(Job *job, char *cp, char *endp, int msg)
2015 if (commandShell->noPrint) {
2016 ecp = strstr(cp, commandShell->noPrint);
2017 while (ecp != NULL) {
2020 if (msg && job->node != lastNode) {
2021 MESSAGE(stdout, job->node);
2022 lastNode = job->node;
2025 * The only way there wouldn't be a newline
2026 * after this line is if it were the last in
2027 * the buffer. However, since the non-printable
2028 * comes after it, there must be a newline, so
2029 * we don't print one.
2031 fprintf(stdout, "%s", cp);
2034 cp = ecp + strlen(commandShell->noPrint);
2037 * Still more to print, look again after
2038 * skipping the whitespace following the
2039 * non-printable command....
2042 while (*cp == ' ' || *cp == '\t' ||
2046 ecp = strstr(cp, commandShell->noPrint);
2057 * This function is called at different times depending on
2058 * whether the user has specified that output is to be collected
2059 * via pipes or temporary files. In the former case, we are called
2060 * whenever there is something to read on the pipe. We collect more
2061 * output from the given job and store it in the job's outBuf. If
2062 * this makes up a line, we print it tagged by the job's identifier,
2064 * If output has been collected in a temporary file, we open the
2065 * file and read it line by line, transfering it to our own
2066 * output channel until the file is empty. At which point we
2067 * remove the temporary file.
2068 * In both cases, however, we keep our figurative eye out for the
2069 * 'noPrint' line for the shell from which the output came. If
2070 * we recognize a line, we don't print it. If the command is not
2071 * alone on the line (the character after it is not \0 or \n), we
2072 * do print whatever follows it.
2075 * curPos may be shifted as may the contents of outBuf.
2078 JobDoOutput(Job *job, Boolean finish)
2080 Boolean gotNL = FALSE; /* true if got a newline */
2081 Boolean fbuf; /* true if our buffer filled up */
2082 int nr; /* number of bytes read */
2083 int i; /* auxiliary index into outBuf */
2084 int max; /* limit for i (end of current data) */
2085 int nRead; /* (Temporary) number of bytes read */
2086 FILE *oFILE; /* Stream pointer to shell's output file */
2091 * Read as many bytes as will fit in the buffer.
2097 nRead = read(job->inPipe, &job->outBuf[job->curPos],
2098 JOB_BUFSIZE - job->curPos);
2100 * Check for interrupt here too, because the above read may
2101 * block when the child process is stopped. In this case the
2102 * interrupt will unblock it (we don't use SA_RESTART).
2105 JobPassSig(interrupted);
2108 DEBUGF(JOB, ("JobDoOutput(piperead)"));
2115 * If we hit the end-of-file (the job is dead), we must flush
2116 * its remaining output, so pretend we read a newline if
2117 * there's any output remaining in the buffer.
2118 * Also clear the 'finish' flag so we stop looping.
2120 if (nr == 0 && job->curPos != 0) {
2121 job->outBuf[job->curPos] = '\n';
2124 } else if (nr == 0) {
2129 * Look for the last newline in the bytes we just got. If there
2130 * is one, break out of the loop with 'i' as its index and
2133 max = job->curPos + nr;
2134 for (i = job->curPos + nr - 1; i >= job->curPos; i--) {
2135 if (job->outBuf[i] == '\n') {
2138 } else if (job->outBuf[i] == '\0') {
2142 job->outBuf[i] = ' ';
2148 if (job->curPos == JOB_BUFSIZE) {
2150 * If we've run out of buffer space, we have
2151 * no choice but to print the stuff. sigh.
2157 if (gotNL || fbuf) {
2159 * Need to send the output to the screen. Null terminate
2160 * it first, overwriting the newline character if there
2161 * was one. So long as the line isn't one we should
2162 * filter (according to the shell description), we print
2163 * the line, preceded by a target banner if this target
2164 * isn't the same as the one for which we last printed
2165 * something. The rest of the data in the buffer are
2166 * then shifted down to the start of the buffer and
2167 * curPos is set accordingly.
2169 job->outBuf[i] = '\0';
2170 if (i >= job->curPos) {
2173 cp = JobOutput(job, job->outBuf,
2174 &job->outBuf[i], FALSE);
2177 * There's still more in that buffer. This time,
2178 * though, we know there's no newline at the
2179 * end, so we add one of our own free will.
2182 if (job->node != lastNode) {
2183 MESSAGE(stdout, job->node);
2184 lastNode = job->node;
2186 fprintf(stdout, "%s%s", cp,
2192 /* shift the remaining characters down */
2193 memcpy(job->outBuf, &job->outBuf[i + 1],
2195 job->curPos = max - (i + 1);
2199 * We have written everything out, so we just
2200 * start over from the start of the buffer.
2201 * No copying. No nothing.
2208 * If the finish flag is true, we must loop until we hit
2209 * end-of-file on the pipe. This is guaranteed to happen
2210 * eventually since the other end of the pipe is now
2211 * closed (we closed it explicitly and the child has
2212 * exited). When we do get an EOF, finish will be set
2213 * FALSE and we'll fall through and out.
2220 * We've been called to retrieve the output of the job from the
2221 * temporary file where it's been squirreled away. This consists
2222 * of opening the file, reading the output line by line, being
2223 * sure not to print the noPrint line for the shell we used,
2224 * then close and remove the temporary file. Very simple.
2226 * Change to read in blocks and do FindSubString type things
2227 * as for pipes? That would allow for "@echo -n..."
2229 oFILE = fopen(job->outFile, "r");
2230 if (oFILE != NULL) {
2231 fprintf(stdout, "Results of making %s:\n",
2235 while (fgets(inLine, sizeof(inLine), oFILE) != NULL) {
2236 char *cp, *endp, *oendp;
2239 oendp = endp = inLine + strlen(inLine);
2240 if (endp[-1] == '\n') {
2243 cp = JobOutput(job, inLine, endp, FALSE);
2246 * There's still more in that buffer. This time,
2247 * though, we know there's no newline at the
2248 * end, so we add one of our own free will.
2250 fprintf(stdout, "%s", cp);
2252 if (endp != oendp) {
2253 fprintf(stdout, "\n");
2258 eunlink(job->outFile);
2265 * Handle the exit of a child. Called from Make_Make.
2268 * The job descriptor is removed from the list of children.
2271 * We do waits, blocking or not, according to the wisdom of our
2272 * caller, until there are no more children to report. For each
2273 * job, call JobFinish to finish things off. This will take care of
2274 * putting jobs on the stoppedJobs queue.
2277 Job_CatchChildren(Boolean block)
2279 pid_t pid; /* pid of dead child */
2280 Job *job; /* job descriptor for dead child */
2281 int status; /* Exit/termination status */
2284 * Don't even bother if we know there's no one around.
2291 pid = waitpid((pid_t)-1, &status,
2292 (block ? 0 : WNOHANG) | WUNTRACED);
2296 DEBUGF(JOB, ("Process %jd exited or stopped.\n",
2299 TAILQ_FOREACH(job, &jobs, link) {
2300 if (job->pid == pid)
2305 if (WIFSIGNALED(status) &&
2306 (WTERMSIG(status) == SIGCONT)) {
2307 TAILQ_FOREACH(job, &jobs, link) {
2308 if (job->pid == pid)
2312 Error("Resumed child (%jd) "
2313 "not in table", (intmax_t)pid);
2316 TAILQ_REMOVE(&stoppedJobs, job, link);
2318 Error("Child (%jd) not in table?",
2323 TAILQ_REMOVE(&jobs, job, link);
2325 if (fifoFd >= 0 && maxJobs > 1) {
2326 write(fifoFd, "+", 1);
2328 if (nJobs >= maxJobs)
2333 DEBUGF(JOB, ("Job queue is no longer full.\n"));
2338 JobFinish(job, &status);
2341 JobPassSig(interrupted);
2346 * Catch the output from our children, if we're using
2347 * pipes do so. Otherwise just block time until we get a
2348 * signal(most likely a SIGCHLD) since there's no point in
2349 * just spinning when there's nothing to do and the reaping
2350 * of a child can wait for a while.
2353 * Output is read from pipes if we're piping.
2357 Job_CatchOutput(int flag __unused)
2359 Job_CatchOutput(int flag)
2365 struct kevent kev[KEV_SIZE];
2368 struct timeval timeout;
2377 if ((nfds = kevent(kqfd, NULL, 0, kev, KEV_SIZE, NULL)) == -1) {
2379 Punt("kevent: %s", strerror(errno));
2381 JobPassSig(interrupted);
2383 for (i = 0; i < nfds; i++) {
2384 if (kev[i].flags & EV_ERROR) {
2385 warnc(kev[i].data, "kevent");
2388 switch (kev[i].filter) {
2390 JobDoOutput(kev[i].udata, FALSE);
2394 * Just wake up and let
2395 * Job_CatchChildren() collect the
2404 timeout.tv_sec = SEL_SEC;
2405 timeout.tv_usec = SEL_USEC;
2406 if (flag && jobFull && fifoFd >= 0)
2407 FD_SET(fifoFd, &readfds);
2409 nfds = select(FD_SETSIZE, &readfds, (fd_set *)NULL,
2410 (fd_set *)NULL, &timeout);
2413 JobPassSig(interrupted);
2416 if (fifoFd >= 0 && FD_ISSET(fifoFd, &readfds)) {
2420 job = TAILQ_FIRST(&jobs);
2421 while (nfds != 0 && job != NULL) {
2422 if (FD_ISSET(job->inPipe, &readfds)) {
2423 JobDoOutput(job, FALSE);
2426 job = TAILQ_NEXT(job, link);
2428 #endif /* !USE_KQUEUE */
2434 * Start the creation of a target. Basically a front-end for
2435 * JobStart used by the Make module.
2438 * Another job is started.
2444 JobStart(gn, 0, NULL);
2449 * Initialize the process module, given a maximum number of jobs.
2452 * lists and counters are initialized
2455 Job_Init(int maxproc)
2457 GNode *begin; /* node for commands to do at the very start */
2459 struct sigaction sa;
2462 env = getenv("MAKE_JOBS_FIFO");
2464 if (env == NULL && maxproc > 1) {
2466 * We did not find the environment variable so we are the
2467 * leader. Create the fifo, open it, write one char per
2468 * allowed job into the pipe.
2470 fifoFd = mkfifotemp(fifoName);
2475 fcntl(fifoFd, F_SETFL, O_NONBLOCK);
2477 setenv("MAKE_JOBS_FIFO", env, 1);
2478 while (maxproc-- > 0) {
2479 write(fifoFd, "+", 1);
2481 /* The master make does not get a magic token */
2486 } else if (env != NULL) {
2488 * We had the environment variable so we are a slave.
2489 * Open fifo and give ourselves a magic token which represents
2490 * the token our parent make has grabbed to start his make
2491 * process. Otherwise the sub-makes would gobble up tokens and
2492 * the proper number of tokens to specify to -j would depend
2493 * on the depth of the tree and the order of execution.
2495 fifoFd = open(env, O_RDWR, 0);
2497 fcntl(fifoFd, F_SETFL, O_NONBLOCK);
2514 if ((maxJobs == 1 && fifoFd < 0) || beVerbose == 0) {
2516 * If only one job can run at a time, there's no need for a
2517 * banner, no is there?
2525 * Catch the four signals that POSIX specifies if they aren't ignored.
2526 * JobCatchSignal will just set global variables and hope someone
2527 * else is going to handle the interrupt.
2529 sa.sa_handler = JobCatchSig;
2530 sigemptyset(&sa.sa_mask);
2533 if (signal(SIGINT, SIG_IGN) != SIG_IGN) {
2534 sigaction(SIGINT, &sa, NULL);
2536 if (signal(SIGHUP, SIG_IGN) != SIG_IGN) {
2537 sigaction(SIGHUP, &sa, NULL);
2539 if (signal(SIGQUIT, SIG_IGN) != SIG_IGN) {
2540 sigaction(SIGQUIT, &sa, NULL);
2542 if (signal(SIGTERM, SIG_IGN) != SIG_IGN) {
2543 sigaction(SIGTERM, &sa, NULL);
2546 * There are additional signals that need to be caught and passed if
2547 * either the export system wants to be told directly of signals or if
2548 * we're giving each job its own process group (since then it won't get
2549 * signals from the terminal driver as we own the terminal)
2551 #if defined(USE_PGRP)
2552 if (signal(SIGTSTP, SIG_IGN) != SIG_IGN) {
2553 sigaction(SIGTSTP, &sa, NULL);
2555 if (signal(SIGTTOU, SIG_IGN) != SIG_IGN) {
2556 sigaction(SIGTTOU, &sa, NULL);
2558 if (signal(SIGTTIN, SIG_IGN) != SIG_IGN) {
2559 sigaction(SIGTTIN, &sa, NULL);
2561 if (signal(SIGWINCH, SIG_IGN) != SIG_IGN) {
2562 sigaction(SIGWINCH, &sa, NULL);
2567 if ((kqfd = kqueue()) == -1) {
2568 Punt("kqueue: %s", strerror(errno));
2572 begin = Targ_FindNode(".BEGIN", TARG_NOCREATE);
2574 if (begin != NULL) {
2575 JobStart(begin, JOB_SPECIAL, (Job *)NULL);
2578 Job_CatchChildren(!usePipes);
2581 postCommands = Targ_FindNode(".END", TARG_CREATE);
2586 * See if the job table is full. It is considered full if it is OR
2587 * if we are in the process of aborting OR if we have
2588 * reached/exceeded our local quota. This prevents any more jobs
2592 * TRUE if the job table is full, FALSE otherwise
2602 if (fifoFd >= 0 && jobFull) {
2603 i = read(fifoFd, &c, 1);
2614 * See if the job table is empty. Because the local concurrency may
2615 * be set to 0, it is possible for the job table to become empty,
2616 * while the list of stoppedJobs remains non-empty. In such a case,
2617 * we want to restart as many jobs as we can.
2620 * TRUE if it is. FALSE if it ain't.
2626 if (!TAILQ_EMPTY(&stoppedJobs) && !aborting) {
2628 * The job table is obviously not full if it has no
2629 * jobs in it...Try and restart the stopped jobs.
2644 * Handle the receipt of an interrupt.
2647 * All children are killed. Another job will be started if the
2648 * .INTERRUPT target was given.
2651 JobInterrupt(int runINTERRUPT, int signo)
2653 Job *job; /* job descriptor in that element */
2654 GNode *interrupt; /* the node describing the .INTERRUPT target */
2656 aborting = ABORT_INTERRUPT;
2658 TAILQ_FOREACH(job, &jobs, link) {
2659 if (!Targ_Precious(job->node)) {
2660 char *file = (job->node->path == NULL ?
2661 job->node->name : job->node->path);
2663 if (!noExecute && eunlink(file) != -1) {
2664 Error("*** %s removed", file);
2668 DEBUGF(JOB, ("JobInterrupt passing signal to child "
2669 "%jd.\n", (intmax_t)job->pid));
2670 KILL(job->pid, signo);
2674 if (runINTERRUPT && !touchFlag) {
2676 * clear the interrupted flag because we would get an
2677 * infinite loop otherwise.
2681 interrupt = Targ_FindNode(".INTERRUPT", TARG_NOCREATE);
2682 if (interrupt != NULL) {
2683 ignoreErrors = FALSE;
2685 JobStart(interrupt, JOB_IGNDOTS, (Job *)NULL);
2688 Job_CatchChildren(!usePipes);
2696 * Do final processing such as the running of the commands
2697 * attached to the .END target.
2700 * Number of errors reported.
2706 if (postCommands != NULL && !Lst_IsEmpty(&postCommands->commands)) {
2708 Error("Errors reported so .END ignored");
2710 JobStart(postCommands, JOB_SPECIAL | JOB_IGNDOTS, NULL);
2714 Job_CatchChildren(!usePipes);
2729 * Waits for all running jobs to finish and returns. Sets 'aborting'
2730 * to ABORT_WAIT to prevent other jobs from starting.
2733 * Currently running jobs finish.
2739 aborting = ABORT_WAIT;
2740 while (nJobs != 0) {
2742 Job_CatchChildren(!usePipes);
2749 * Abort all currently running jobs without handling output or anything.
2750 * This function is to be called only in the event of a major
2751 * error. Most definitely NOT to be called from JobInterrupt.
2754 * All children are killed, not just the firstborn
2759 Job *job; /* the job descriptor in that element */
2762 aborting = ABORT_ERROR;
2765 TAILQ_FOREACH(job, &jobs, link) {
2767 * kill the child process with increasingly drastic
2768 * signals to make darn sure it's dead.
2770 KILL(job->pid, SIGINT);
2771 KILL(job->pid, SIGKILL);
2776 * Catch as many children as want to report in at first, then give up
2778 while (waitpid((pid_t)-1, &status, WNOHANG) > 0)
2784 * Tries to restart stopped jobs if there are slots available.
2785 * Note that this tries to restart them regardless of pending errors.
2786 * It's not good to leave stopped jobs lying around!
2789 * Resumes(and possibly migrates) jobs.
2792 JobRestartJobs(void)
2796 while (!jobFull && (job = TAILQ_FIRST(&stoppedJobs)) != NULL) {
2797 DEBUGF(JOB, ("Job queue is not full. "
2798 "Restarting a stopped job.\n"));
2799 TAILQ_REMOVE(&stoppedJobs, job, link);
2806 * Execute the command in cmd, and return the output of that command
2810 * A string containing the output of the command, or the empty string
2811 * If error is not NULL, it contains the reason for the command failure
2812 * Any output sent to stderr in the child process is passed to stderr,
2813 * and not captured in the string.
2816 * The string must be freed by the caller.
2819 Cmd_Exec(const char *cmd, const char **error)
2821 int fds[2]; /* Pipe streams */
2822 int status; /* command exit status */
2823 Buffer *buf; /* buffer to store the result */
2831 * Open a pipe for fetching its output
2833 if (pipe(fds) == -1) {
2834 *error = "Couldn't create pipe for \"%s\"";
2838 /* Set close-on-exec on read side of pipe. */
2839 fcntl(fds[0], F_SETFD, fcntl(fds[0], F_GETFD) | FD_CLOEXEC);
2841 ps.in = STDIN_FILENO;
2843 ps.err = STDERR_FILENO;
2845 ps.merge_errors = 0;
2849 /* Set up arguments for shell */
2850 ps.argv = emalloc(4 * sizeof(char *));
2851 ps.argv[0] = strdup(commandShell->name);
2852 ps.argv[1] = strdup("-c");
2853 ps.argv[2] = strdup(cmd);
2858 * Fork. Warning since we are doing vfork() instead of fork(),
2859 * do not allocate memory in the child process!
2861 if ((ps.child_pid = vfork()) == -1) {
2862 *error = "Couldn't exec \"%s\"";
2864 } else if (ps.child_pid == 0) {
2877 close(fds[1]); /* No need for the writing half of the pipe. */
2880 char result[BUFSIZ];
2882 rcnt = read(fds[0], result, sizeof(result));
2884 Buf_AddBytes(buf, (size_t)rcnt, (Byte *)result);
2885 } while (rcnt > 0 || (rcnt == -1 && errno == EINTR));
2888 *error = "Error reading shell's output for \"%s\"";
2891 * Close the input side of the pipe.
2895 status = ProcWait(&ps);
2897 *error = "\"%s\" returned non-zero status";
2899 Buf_StripNewlines(buf);
2906 * Interrupt handler - set flag and defer handling to the main code
2909 CompatCatchSig(int signo)
2912 interrupted = signo;
2917 * Interrupt the creation of the current target and remove it if
2918 * it ain't precious.
2924 * The target is removed and the process exits. If .INTERRUPT exists,
2925 * its commands are run first WITH INTERRUPTS IGNORED..
2928 CompatInterrupt(int signo)
2931 sigset_t nmask, omask;
2934 sigemptyset(&nmask);
2935 sigaddset(&nmask, SIGINT);
2936 sigaddset(&nmask, SIGTERM);
2937 sigaddset(&nmask, SIGHUP);
2938 sigaddset(&nmask, SIGQUIT);
2939 sigprocmask(SIG_SETMASK, &nmask, &omask);
2941 /* prevent recursion in evaluation of .INTERRUPT */
2944 if (curTarg != NULL && !Targ_Precious(curTarg)) {
2945 const char *file = Var_Value(TARGET, curTarg);
2947 if (!noExecute && eunlink(file) != -1) {
2948 printf("*** %s removed\n", file);
2953 * Run .INTERRUPT only if hit with interrupt signal
2955 if (signo == SIGINT) {
2956 gn = Targ_FindNode(".INTERRUPT", TARG_NOCREATE);
2958 LST_FOREACH(ln, &gn->commands) {
2959 if (Compat_RunCommand(Lst_Datum(ln), gn))
2965 sigprocmask(SIG_SETMASK, &omask, NULL);
2967 if (signo == SIGQUIT)
2969 signal(signo, SIG_DFL);
2970 kill(getpid(), signo);
2975 * Execute the next command for a target. If the command returns an
2976 * error, the node's made field is set to ERROR and creation stops.
2977 * The node from which the command came is also given.
2980 * 0 if the command succeeded, 1 if an error occurred.
2983 * The node's 'made' field may be set to ERROR.
2986 Compat_RunCommand(char *cmd, GNode *gn)
2989 char *cmdStart; /* Start of expanded command */
2990 Boolean silent; /* Don't print command */
2991 Boolean doit; /* Execute even in -n */
2992 Boolean errCheck; /* Check errors */
2993 int reason; /* Reason for child's death */
2994 int status; /* Description of child's death */
2995 LstNode *cmdNode; /* Node where current cmd is located */
2996 char **av; /* Argument vector for thing to exec */
2999 silent = gn->type & OP_SILENT;
3000 errCheck = !(gn->type & OP_IGNORE);
3003 cmdNode = Lst_Member(&gn->commands, cmd);
3004 cmdStart = Buf_Peel(Var_Subst(cmd, gn, FALSE));
3006 if (*cmdStart == '\0') {
3008 Error("%s expands to empty string", cmd);
3013 Lst_Replace(cmdNode, cmdStart);
3015 if ((gn->type & OP_SAVE_CMDS) && (gn != ENDNode)) {
3016 Lst_AtEnd(&ENDNode->commands, cmdStart);
3018 } else if (strcmp(cmdStart, "...") == 0) {
3019 gn->type |= OP_SAVE_CMDS;
3023 while (*cmd == '@' || *cmd == '-' || *cmd == '+') {
3027 silent = DEBUG(LOUD) ? FALSE : TRUE;
3041 while (isspace((unsigned char)*cmd))
3045 * Print the command before echoing if we're not supposed to be quiet
3046 * for this one. We also print the command if -n given, but not if '+'.
3048 if (!silent || (noExecute && !doit)) {
3049 printf("%s\n", cmd);
3054 * If we're not supposed to execute any commands, this is as far as
3057 if (!doit && noExecute) {
3061 if (strpbrk(cmd, "#=|^(){};&<>*?[]:$`\\\n")) {
3063 * We found a "meta" character and need to pass the command
3070 const char *sh_builtin[] = {
3071 "alias", "cd", "eval", "exec",
3072 "exit", "read", "set", "ulimit",
3073 "unalias", "umask", "unset", "wait",
3078 * Break the command into words to form an argument
3079 * vector we can execute.
3081 brk_string(&aa, cmd, TRUE);
3084 for (p = sh_builtin; *p != 0; p++) {
3085 if (strcmp(av[0], *p) == 0) {
3087 * This command must be passed by the shell
3088 * for other reasons.. or.. possibly not at
3097 ps.in = STDIN_FILENO;
3098 ps.out = STDOUT_FILENO;
3099 ps.err = STDERR_FILENO;
3101 ps.merge_errors = 0;
3107 * We give the shell the -e flag as well as -c if it's
3108 * supposed to exit when it hits an error.
3110 ps.argv = emalloc(4 * sizeof(char *));
3111 ps.argv[0] = strdup(commandShell->path);
3112 ps.argv[1] = strdup(errCheck ? "-ec" : "-c");
3113 ps.argv[2] = strdup(cmd);
3120 ps.errCheck = errCheck;
3123 * Fork and execute the single command. If the fork fails, we abort.
3124 * Warning since we are doing vfork() instead of fork(),
3125 * do not allocate memory in the child process!
3127 if ((ps.child_pid = vfork()) == -1) {
3128 Fatal("Could not fork");
3130 } else if (ps.child_pid == 0) {
3148 * we need to print out the command associated with this
3149 * Gnode in Targ_PrintCmd from Targ_PrintGraph when debugging
3150 * at level g2, in main(), Fatal() and DieHorribly(),
3151 * therefore do not free it when debugging.
3153 if (!DEBUG(GRAPH2)) {
3158 * The child is off and running. Now all we can do is wait...
3160 reason = ProcWait(&ps);
3163 CompatInterrupt(interrupted);
3166 * Decode and report the reason child exited, then
3167 * indicate how we handled it.
3169 if (WIFEXITED(reason)) {
3170 status = WEXITSTATUS(reason);
3174 printf("*** Error code %d", status);
3176 } else if (WIFSTOPPED(reason)) {
3177 status = WSTOPSIG(reason);
3179 status = WTERMSIG(reason);
3180 printf("*** Signal %d", status);
3191 printf(" (continuing)\n");
3196 * Continue executing
3197 * commands for this target.
3198 * If we return 0, this will
3201 printf(" (ignored)\n");
3209 * Make a target, given the parent, to abort if necessary.
3212 * If an error is detected and not being ignored, the process exits.
3215 CompatMake(GNode *gn, GNode *pgn)
3219 if (gn->type & OP_USE) {
3220 Make_HandleUse(gn, pgn);
3222 } else if (gn->made == UNMADE) {
3224 * First mark ourselves to be made, then apply whatever
3225 * transformations the suffix module thinks are necessary.
3226 * Once that's done, we can descend and make all our children.
3227 * If any of them has an error but the -k flag was given, our
3228 * 'make' field will be set FALSE again. This is our signal to
3229 * not attempt to do anything but abort our parent as well.
3232 gn->made = BEINGMADE;
3234 LST_FOREACH(ln, &gn->children)
3235 CompatMake(Lst_Datum(ln), gn);
3242 if (Lst_Member(&gn->iParents, pgn) != NULL) {
3243 Var_Set(IMPSRC, Var_Value(TARGET, gn), pgn);
3247 * All the children were made ok. Now cmtime contains the
3248 * modification time of the newest child, we need to find out
3249 * if we exist and when we were modified last. The criteria for
3250 * datedness are defined by the Make_OODate function.
3252 DEBUGF(MAKE, ("Examining %s...", gn->name));
3253 if (!Make_OODate(gn)) {
3254 gn->made = UPTODATE;
3255 DEBUGF(MAKE, ("up-to-date.\n"));
3258 DEBUGF(MAKE, ("out-of-date.\n"));
3262 * If the user is just seeing if something is out-of-date,
3263 * exit now to tell him/her "yes".
3270 * We need to be re-made. We also have to make sure we've got
3271 * a $? variable. To be nice, we also define the $> variable
3272 * using Make_DoAllVar().
3277 * Alter our type to tell if errors should be ignored or things
3278 * should not be printed so Compat_RunCommand knows what to do.
3280 if (Targ_Ignore(gn)) {
3281 gn->type |= OP_IGNORE;
3283 if (Targ_Silent(gn)) {
3284 gn->type |= OP_SILENT;
3287 if (Job_CheckCommands(gn, Fatal)) {
3289 * Our commands are ok, but we still have to worry
3290 * about the -t flag...
3294 LST_FOREACH(ln, &gn->commands) {
3295 if (Compat_RunCommand(Lst_Datum(ln),
3301 Job_Touch(gn, gn->type & OP_SILENT);
3307 if (gn->made != ERROR) {
3309 * If the node was made successfully, mark it so, update
3310 * its modification time and timestamp all its parents.
3311 * Note that for .ZEROTIME targets, the timestamping
3312 * isn't done. This is to keep its state from affecting
3313 * that of its parent.
3318 * We can't re-stat the thing, but we can at least take
3319 * care of rules where a target depends on a source that
3320 * actually creates the target, but only if it has
3328 * mv y.tab.o parse.o
3329 * cmp -s y.tab.h parse.h || mv y.tab.h parse.h
3331 * In this case, if the definitions produced by yacc
3332 * haven't changed from before, parse.h won't have been
3333 * updated and gn->mtime will reflect the current
3334 * modification time for parse.h. This is something of a
3335 * kludge, I admit, but it's a useful one..
3337 * XXX: People like to use a rule like
3341 * To force things that depend on FRC to be made, so we
3342 * have to check for gn->children being empty as well...
3344 if (!Lst_IsEmpty(&gn->commands) ||
3345 Lst_IsEmpty(&gn->children)) {
3350 * This is what Make does and it's actually a good
3351 * thing, as it allows rules like
3353 * cmp -s y.tab.h parse.h || cp y.tab.h parse.h
3355 * to function as intended. Unfortunately, thanks to
3356 * the stateless nature of NFS (and the speed of this
3357 * program), there are times when the modification time
3358 * of a file created on a remote machine will not be
3359 * modified before the stat() implied by the Dir_MTime
3360 * occurs, thus leading us to believe that the file
3361 * is unchanged, wreaking havoc with files that depend
3364 * I have decided it is better to make too much than to
3365 * make too little, so this stuff is commented out
3366 * unless you're sure it's ok.
3369 if (noExecute || Dir_MTime(gn) == 0) {
3372 if (gn->cmtime > gn->mtime)
3373 gn->mtime = gn->cmtime;
3374 DEBUGF(MAKE, ("update time: %s\n",
3375 Targ_FmtTime(gn->mtime)));
3377 if (!(gn->type & OP_EXEC)) {
3378 pgn->childMade = TRUE;
3379 Make_TimeStamp(pgn, gn);
3382 } else if (keepgoing) {
3386 printf("\n\nStop in %s.\n", Var_Value(".CURDIR", gn));
3389 } else if (gn->made == ERROR) {
3391 * Already had an error when making this beastie. Tell the
3396 if (Lst_Member(&gn->iParents, pgn) != NULL) {
3397 Var_Set(IMPSRC, Var_Value(TARGET, gn), pgn);
3401 Error("Graph cycles through %s\n", gn->name);
3406 if ((gn->type & OP_EXEC) == 0) {
3407 pgn->childMade = TRUE;
3408 Make_TimeStamp(pgn, gn);
3412 if ((gn->type & OP_EXEC) == 0) {
3413 Make_TimeStamp(pgn, gn);
3426 * Start making again, given a list of target nodes.
3435 Compat_Run(Lst *targs)
3437 GNode *gn = NULL; /* Current root target */
3438 int error_cnt; /* Number of targets not remade due to errors */
3441 if (signal(SIGINT, SIG_IGN) != SIG_IGN) {
3442 signal(SIGINT, CompatCatchSig);
3444 if (signal(SIGTERM, SIG_IGN) != SIG_IGN) {
3445 signal(SIGTERM, CompatCatchSig);
3447 if (signal(SIGHUP, SIG_IGN) != SIG_IGN) {
3448 signal(SIGHUP, CompatCatchSig);
3450 if (signal(SIGQUIT, SIG_IGN) != SIG_IGN) {
3451 signal(SIGQUIT, CompatCatchSig);
3454 ENDNode = Targ_FindNode(".END", TARG_CREATE);
3456 * If the user has defined a .BEGIN target, execute the commands
3460 gn = Targ_FindNode(".BEGIN", TARG_NOCREATE);
3462 LST_FOREACH(ln, &gn->commands) {
3463 if (Compat_RunCommand(Lst_Datum(ln), gn))
3466 if (gn->made == ERROR) {
3467 printf("\n\nStop.\n");
3474 * For each entry in the list of targets to create, call CompatMake on
3475 * it to create the thing. CompatMake will leave the 'made' field of gn
3476 * in one of several states:
3477 * UPTODATE gn was already up-to-date
3478 * MADE gn was recreated successfully
3479 * ERROR An error occurred while gn was being created
3480 * ABORTED gn was not remade because one of its inferiors
3481 * could not be made due to errors.
3484 while (!Lst_IsEmpty(targs)) {
3485 gn = Lst_DeQueue(targs);
3488 if (gn->made == UPTODATE) {
3489 printf("`%s' is up to date.\n", gn->name);
3490 } else if (gn->made == ABORTED) {
3491 printf("`%s' not remade because of errors.\n",
3498 * If the user has defined a .END target, run its commands.
3500 if (error_cnt == 0) {
3501 LST_FOREACH(ln, &ENDNode->commands) {
3502 if (Compat_RunCommand(Lst_Datum(ln), gn))
lentferj's projects / dragonfly.git / blob