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

6 * All rights reserved.

8 * This code is derived from software contributed to Berkeley by

9 * Adam de Boor.

11 * Redistribution and use in source and binary forms, with or without

12 * modification, are permitted provided that the following conditions

13 * are met:

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

31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

37 * SUCH DAMAGE.

47 * handle the creation etc. of our child processes.

50 * Job_Make Start the creation of the given target.

53 * Check for and handle the termination of any children.

54 * This must be called reasonably frequently to keep the

55 * whole make going at a decent clip, since job table

56 * entries aren't removed until their process is caught

57 * this way. Its single argument is TRUE if the function

58 * should block waiting for a child to terminate.

60 * Job_CatchOutput Print any output our children have produced. Should

61 * also be called fairly frequently to keep the user

62 * informed of what's going on. If no output is waiting,

63 * it will block for a time given by the SEL_* constants,

64 * below, or until output is ready.

66 * Job_Init Called to intialize this module. in addition, any

67 * commands attached to the .BEGIN target are executed

68 * before this function returns. Hence, the makefile must

69 * have been parsed before this function is called.

71 * Job_Full Return TRUE if the job table is filled.

73 * Job_Empty Return TRUE if the job table is completely empty.

75 * Job_Finish Perform any final processing which needs doing. This

76 * includes the execution of any commands which have

77 * been/were attached to the .END target. It should only

78 * be called when the job table is empty.

80 * Job_AbortAll Abort all currently running jobs. It doesn't handle

81 * output or do anything for the jobs, just kills them.

82 * It should only be called in an emergency, as it were.

85 * Verify that the commands for a target are ok. Provide

86 * them if necessary and possible.

88 * Job_Touch Update a target without really updating it.

90 * Job_Wait Wait for all currently-running jobs to finish.

93 * The routines in this file implement the full-compatibility

94 * mode of PMake. Most of the special functionality of PMake

95 * is available in this mode. Things not supported:

96 * - different shells.

97 * - friendly variable substitution.

100 * Compat_Run Initialize things for this module and recreate

101 * thems as need creatin'

140 #define TMPPAT "/tmp/makeXXXXXXXXXX"

144 * The SEL_ constants determine the maximum amount of time spent in select

145 * before coming out to see if a child has finished. SEL_SEC is the number of

146 * seconds and SEL_USEC is the number of micro-seconds

148 #define SEL_SEC 2

149 #define SEL_USEC 0

153 * Job Table definitions.

155 * The job "table" is kept as a linked Lst in 'jobs', with the number of

156 * active jobs maintained in the 'nJobs' variable. At no time will this

157 * exceed the value of 'maxJobs', initialized by the Job_Init function.

159 * When a job is finished, the Make_Update function is called on each of the

160 * parents of the node which was just remade. This takes care of the upward

161 * traversal of the dependency graph.

163 #define JOB_BUFSIZE 1024

164 typedef struct Job {

165 pid_t pid; /* The child's process ID */

167 struct GNode *node; /* The target the child is making */

170 * A LstNode for the first command to be saved after the job completes.

171 * This is NULL if there was no "..." in the job's commands.

173 LstNode *tailCmds;

176 * An FILE* for writing out the commands. This is only

177 * used before the job is actually started.

179 FILE *cmdFILE;

182 * A word of flags which determine how the module handles errors,

183 * echoing, etc. for the job

185 short flags; /* Flags to control treatment of job */

186 #define JOB_IGNERR 0x001 /* Ignore non-zero exits */

187 #define JOB_SILENT 0x002 /* no output */

188 #define JOB_SPECIAL 0x004 /* Target is a special one. i.e. run it locally

189 * if we can't export it and maxLocal is 0 */

190 #define JOB_IGNDOTS 0x008 /* Ignore "..." lines when processing

191 * commands */

192 #define JOB_FIRST 0x020 /* Job is first job for the node */

193 #define JOB_RESTART 0x080 /* Job needs to be completely restarted */

194 #define JOB_RESUME 0x100 /* Job needs to be resumed b/c it stopped,

195 * for some reason */

196 #define JOB_CONTINUING 0x200 /* We are in the process of resuming this job.

197 * Used to avoid infinite recursion between

198 * JobFinish and JobRestart */

200 /* union for handling shell's output */

201 union {

203 * This part is used when usePipes is true.

204 * The output is being caught via a pipe and the descriptors

205 * of our pipe, an array in which output is line buffered and

206 * the current position in that buffer are all maintained for

207 * each job.

209 struct {

211 * Input side of pipe associated with

212 * job's output channel

214 int op_inPipe;

217 * Output side of pipe associated with job's

218 * output channel

220 int op_outPipe;

223 * Buffer for storing the output of the

224 * job, line by line

226 char op_outBuf[JOB_BUFSIZE + 1];

228 /* Current position in op_outBuf */

229 int op_curPos;

233 * If usePipes is false the output is routed to a temporary

234 * file and all that is kept is the name of the file and the

235 * descriptor open to the file.

237 struct {

238 /* Name of file to which shell output was rerouted */

239 char of_outFile[sizeof(TMPPAT)];

242 * Stream open to the output file. Used to funnel all

243 * from a single job to one file while still allowing

244 * multiple shell invocations

246 int of_outFd;

249 } output; /* Data for tracking a shell's output */

251 TAILQ_ENTRY(Job) link; /* list link */

254 #define outPipe output.o_pipe.op_outPipe

255 #define inPipe output.o_pipe.op_inPipe

256 #define outBuf output.o_pipe.op_outBuf

257 #define curPos output.o_pipe.op_curPos

258 #define outFile output.o_file.of_outFile

259 #define outFd output.o_file.of_outFd

264 * error handling variables

266 static int aborting = 0; /* why is the make aborting? */

267 #define ABORT_ERROR 1 /* Because of an error */

268 #define ABORT_INTERRUPT 2 /* Because it was interrupted */

269 #define ABORT_WAIT 3 /* Waiting for jobs to finish */

272 * XXX: Avoid SunOS bug... FILENO() is fp->_file, and file

273 * is a char! So when we go above 127 we turn negative!

278 * post-make command processing. The node postCommands is really just the

279 * .END target but we keep it around to avoid having to search for it

280 * all the time.

282 static GNode *postCommands;

285 * The number of commands actually printed for a target. Should this

286 * number be 0, no shell will be executed.

288 static int numCommands;

291 * Return values from JobStart.

293 #define JOB_RUNNING 0 /* Job is running */

294 #define JOB_ERROR 1 /* Error in starting the job */

295 #define JOB_FINISHED 2 /* The job is already finished */

296 #define JOB_STOPPED 3 /* The job is stopped */

299 * The maximum number of jobs that may run. This is initialize from the

300 * -j argument for the leading make and from the FIFO for sub-makes.

302 static int maxJobs;

304 static int nJobs; /* The number of children currently running */

306 /* The structures that describe them */

307 static struct JobList jobs = TAILQ_HEAD_INITIALIZER(jobs);

309 static Boolean jobFull; /* Flag to tell when the job table is full. It

310 * is set TRUE when (1) the total number of

311 * running jobs equals the maximum allowed */

313 static int kqfd; /* File descriptor obtained by kqueue() */

315 static fd_set outputs; /* Set of descriptors of pipes connected to

316 * the output channels of children */

319 static GNode *lastNode; /* The node for which output was most recently

321 static const char *targFmt; /* Format string to use to head output from a

322 * job when it's not the most-recent job heard

323 * from */

324 static char *targPrefix = NULL; /* What we print at the start of targFmt */

326 #define TARG_FMT "%s %s ---

" /* Default format */

331 * When JobStart attempts to run a job but isn't allowed to

332 * or when Job_CatchChildren detects a job that has

333 * been stopped somehow, the job is placed on the stoppedJobs queue to be run

334 * when the next job finishes.

336 * Lst of Job structures describing jobs that were stopped due to

337 * concurrency limits or externally

339 static struct JobList stoppedJobs = TAILQ_HEAD_INITIALIZER(stoppedJobs);

341 static int fifoFd; /* Fd of our job fifo */

342 static char fifoName[] = "/tmp/make_fifo_XXXXXXXXX";

343 static int fifoMaster;

345 static volatile sig_atomic_t interrupted;

349 # define KILL(pid, sig) killpg(-(pid), (sig))

351 # if defined(USE_PGRP)

352 # define KILL(pid, sig) killpg((pid), (sig))

353 # else

354 # define KILL(pid, sig) kill((pid), (sig))

355 # endif

359 * Grmpf... There is no way to set bits of the wait structure

360 * anymore with the stupid W*() macros. I liked the union wait

361 * stuff much more. So, we devise our own macros... This is

362 * really ugly, use dramamine sparingly. You have been warned.

366 int sh = (int)~0; \

367 int mask = fun(sh); \

369 for (sh = 0; ((mask >> sh) & 1) == 0; sh++) \

377 static void JobRestart(Job *);

378 static int JobStart(GNode *, int, Job *);

379 static void JobDoOutput(Job *, Boolean);

380 static void JobInterrupt(int, int);

381 static void JobRestartJobs(void);

382 static int Compat_RunCommand(char *, struct GNode *);

384 static GNode *curTarg = NULL;

385 static GNode *ENDNode;

388 * Create a fifo file with a uniq filename, and returns a file

389 * descriptor to that fifo.

391 static int

394 char *start;

395 char *pathend;

396 char *ptr;

397 const unsigned char padchar[] =

400 if (template[0] == '\0') {

401 errno = EINVAL; /* bad input string */

402 return (-1);

405 /* Find end of template string. */

406 pathend = strchr(template, '\0');

407 ptr = pathend - 1;

410 * Starting from the end of the template replace spaces with 'X' in

411 * them with random characters until there are no more 'X'.

413 while (ptr >= template && *ptr == 'X') {

415 #if __FreeBSD_version < 800041

422 start = ptr + 1;

424 /* Check the target directory. */

425 for (; ptr > template; --ptr) {

426 if (*ptr == '/') {

427 struct stat sbuf;

430 if (stat(template, &sbuf) != 0)

431 return (-1);

433 if (!S_ISDIR(sbuf.st_mode)) {

434 errno = ENOTDIR;

435 return (-1);

442 for (;;) {

443 if (mkfifo(template, 0600) == 0) {

444 int fd;

446 if ((fd = open(template, O_RDWR, 0600)) < 0) {

448 return (-1);

449 } else {

450 return (fd);

452 } else {

453 if (errno != EEXIST) {

454 return (-1);

459 * If we have a collision, cycle through the space of

462 for (ptr = start;;) {

463 char *pad;

465 if (*ptr == '\0' || ptr == pathend)

466 return (-1);

468 pad = strchr(padchar, *ptr);

469 if (pad == NULL || *++pad == '\0') {

471 } else {

480 static void

481 catch_child(int sig __unused)

487 void

491 * Catch SIGCHLD so that we get kicked out of select() when we

492 * need to look at a child. This is only known to matter for the

493 * -j case (perhaps without -P).

495 * XXX this is intentionally misplaced.

497 struct sigaction sa;

506 * Wait for child process to terminate.

508 static int

512 int status;

515 * Wait for the process to exit.

517 for (;;) {

518 pid = wait(&status);

519 if (pid == -1 && errno != EINTR) {

520 Fatal("error in wait: %d", pid);

521 /* NOTREACHED */

523 if (pid == ps->child_pid) {

526 if (interrupted) {

531 return (status);

535 * JobCatchSignal

536 * Got a signal. Set global variables and hope that someone will

537 * handle it.

539 static void

543 interrupted = signo;

547 * JobPassSig --

548 * Pass a signal on to all local jobs if

549 * USE_PGRP is defined, then die ourselves.

551 * Side Effects:

552 * We die by the same signal.

554 static void

557 Job *job;

559 struct sigaction act;

567 DEBUGF(JOB, ("JobPassSig passing signal %d to child %jd.

",

573 * Deal with proper cleanup based on the signal received. We only run

574 * the .INTERRUPT target if the signal was in fact an interrupt.

575 * The other three termination signals are more of a "get out *now*"

578 if (signo == SIGINT) {

580 } else if (signo == SIGHUP || signo == SIGTERM || signo == SIGQUIT) {

585 * Leave gracefully if SIGQUIT, rather than core dumping.

587 if (signo == SIGQUIT) {

588 signo = SIGINT;

592 * Send ourselves the signal now we've given the message to everyone

593 * else. Note we block everything else possible while we're getting

594 * the signal. This ensures that all our jobs get continued when we

595 * wake up before we take any other signal.

596 * XXX this comment seems wrong.

603 DEBUGF(JOB, ("JobPassSig passing signal to self, mask = %x.

",

609 signo = SIGCONT;

611 DEBUGF(JOB, ("JobPassSig passing signal %d to child %jd.

",

623 * JobPrintCommand --

624 * Put out another command for the given job. If the command starts

625 * with an @ or a - we process it specially. In the former case,

626 * so long as the -s and -n flags weren't given to make, we stick

627 * a shell-specific echoOff command in the script. In the latter,

628 * we ignore errors for the entire job, unless the shell has error

630 * If the command is just "..." we take all future commands for this

631 * job to be commands to be executed once the entire graph has been

632 * made and return non-zero to signal that the end of the commands

633 * was reached. These commands are later attached to the postCommands

634 * node and executed by Job_Finish when all things are done.

635 * This function is called from JobStart via LST_FOREACH.

638 * Always 0, unless the command was "..."

640 * Side Effects:

641 * If the command begins with a '-' and the shell has no error control,

642 * the JOB_IGNERR flag is set in the job descriptor.

643 * If the command is "..." and we're not ignoring such things,

644 * tailCmds is set to the successor node of the cmd.

645 * numCommands is incremented if the command is actually printed.

647 static int

648 JobPrintCommand(char *cmd, Job *job)

650 Boolean noSpecials; /* true if we shouldn't worry about

651 * inserting special commands into

652 * the input stream. */

653 Boolean shutUp = FALSE; /* true if we put a no echo command

654 * into the command file */

655 Boolean errOff = FALSE; /* true if we turned error checking

656 * off before printing the command

657 * and need to turn it back on */

658 const char *cmdTemplate;/* Template to use when printing the command */

659 char *cmdStart; /* Start of expanded command */

660 LstNode *cmdNode; /* Node for replacing the command */

662 noSpecials = (noExecute && !(job->node->type & OP_MAKE));

664 if (strcmp(cmd, "...") == 0) {

666 if ((job->flags & JOB_IGNDOTS) == 0) {

669 return (1);

671 return (0);

679 numCommands += 1;

682 * For debugging, we replace each command with the result of expanding

683 * the variables in the command.

685 cmdNode = Lst_Member(&job->node->commands, cmd);

687 cmd = Buf_Peel(Var_Subst(cmd, job->node, FALSE));

688 cmdStart = cmd;

692 cmdTemplate = "%s

";

695 * Check for leading @', -' or +'s to control echoing, error checking,

696 * and execution on -n.

698 while (*cmd == '@' || *cmd == '-' || *cmd == '+') {

699 switch (*cmd) {

701 case '@':

702 shutUp = DEBUG(LOUD) ? FALSE : TRUE;

705 case '-':

706 errOff = TRUE;

709 case '+':

710 if (noSpecials) {

712 * We're not actually exececuting anything...

713 * but this one needs to be - use compat mode

714 * just for it.

717 return (0);

724 while (isspace((unsigned char)*cmd))

727 if (shutUp) {

728 if (!(job->flags & JOB_SILENT) && !noSpecials &&

731 } else {

732 shutUp = FALSE;

736 if (errOff) {

737 if (!(job->flags & JOB_IGNERR) && !noSpecials) {

738 if (commandShell->hasErrCtl) {

740 * We don't want the error-control commands

741 * showing up either, so we turn off echoing

742 * while executing them. We could put another

743 * field in the shell structure to tell

744 * JobDoOutput to look for this string too,

745 * but why make it any more complex than

746 * it already is?

748 if (!(job->flags & JOB_SILENT) && !shutUp &&

753 } else {

756 } else if (commandShell->ignErr &&

759 * The shell has no error control, so we need to

760 * be weird to get it to ignore any errors from

761 * the command. If echoing is turned on, we turn

762 * it off and use the errCheck template to echo

763 * the command. Leave echoing off so the user

764 * doesn't see the weirdness we go through to

765 * ignore errors. Set cmdTemplate to use the

766 * weirdness instead of the simple "%s

"

769 if (!(job->flags & JOB_SILENT) && !shutUp &&

773 shutUp = TRUE;

775 cmdTemplate = commandShell->ignErr;

777 * The error ignoration (hee hee) is already

778 * taken care of by the ignErr template, so

779 * pretend error checking is still on.

781 errOff = FALSE;

782 } else {

783 errOff = FALSE;

785 } else {

786 errOff = FALSE;

792 if (errOff) {

794 * If echoing is already off, there's no point in issuing the

795 * echoOff command. Otherwise we issue it and pretend it was on

796 * for the whole command...

798 if (!shutUp && !(job->flags & JOB_SILENT) &&

801 shutUp = TRUE;

805 if (shutUp) {

808 return (0);

812 * JobClose --

813 * Called to close both input and output pipes when a job is finished.

815 * Side Effects:

816 * The file descriptors associated with the job are closed.

818 static void

822 if (usePipes) {

826 if (job->outPipe != job->inPipe) {

831 } else {

838 * JobFinish --

839 * Do final processing for the given job including updating

840 * parents and starting new jobs as available/necessary. Note

841 * that we pay no attention to the JOB_IGNERR flag here.

842 * This is because when we're called because of a noexecute flag

843 * or something, jstat.w_status is 0 and when called from

844 * Job_CatchChildren, the status is zeroed if it s/b ignored.

846 * Side Effects:

847 * Some nodes may be put on the toBeMade queue.

848 * Final commands for the job are placed on postCommands.

850 * If we got an error and are aborting (aborting == ABORT_ERROR) and

851 * the job list is now empty, we are done for the day.

852 * If we recognized an error (makeErrors !=0), we set the aborting flag

853 * to ABORT_ERROR so no more jobs will be started.

855 static void

856 JobFinish(Job *job, int *status)

858 Boolean done;

859 LstNode *ln;

861 if (WIFEXITED(*status)) {

862 int job_status = WEXITSTATUS(*status);

866 * Deal with ignored errors in -B mode. We need to

867 * print a message telling of the ignored error as

868 * well as setting status.w_status to 0 so the next

869 * command gets run. To do this, we set done to be

870 * TRUE if in -B mode and the job exited non-zero.

872 if (job_status == 0) {

873 done = FALSE;

874 } else {

875 if (job->flags & JOB_IGNERR) {

876 done = TRUE;

877 } else {

879 * If it exited non-zero and either we're

880 * doing things our way or we're not ignoring

881 * errors, the job is finished. Similarly, if

882 * the shell died because of a signal the job

883 * is also finished. In these cases, finish

884 * out the job's output before printing the

885 * exit status...

887 done = TRUE;

888 if (job->cmdFILE != NULL &&

895 } else if (WIFSIGNALED(*status)) {

896 if (WTERMSIG(*status) == SIGCONT) {

898 * No need to close things down or anything.

900 done = FALSE;

901 } else {

903 * If it exited non-zero and either we're

904 * doing things our way or we're not ignoring

905 * errors, the job is finished. Similarly, if

906 * the shell died because of a signal the job

907 * is also finished. In these cases, finish

908 * out the job's output before printing the

909 * exit status...

912 if (job->cmdFILE != NULL &&

916 done = TRUE;

918 } else {

920 * No need to close things down or anything.

922 done = FALSE;

925 if (WIFEXITED(*status)) {

926 if (done || DEBUG(JOB)) {

927 FILE *out;

929 if (compatMake &&

933 * If output is going to a file and this job

934 * is ignoring errors, arrange to have the

935 * exit status sent to the output file as

938 out = fdopen(job->outFd, "w");

939 if (out == NULL)

941 } else {

942 out = stdout;

948 if (WEXITSTATUS(*status) == 0) {

949 if (DEBUG(JOB)) {

950 if (usePipes && job->node != lastNode) {

952 lastNode = job->node;

955 "*** Completed successfully

");

957 } else {

958 if (usePipes && job->node != lastNode) {

960 lastNode = job->node;

962 fprintf(out, "*** Error code %d%s

",

967 if (job->flags & JOB_IGNERR) {

974 } else if (WIFSIGNALED(*status)) {

975 if (done || DEBUG(JOB) || (WTERMSIG(*status) == SIGCONT)) {

976 FILE *out;

978 if (compatMake &&

982 * If output is going to a file and this job

983 * is ignoring errors, arrange to have the

984 * exit status sent to the output file as

987 out = fdopen(job->outFd, "w");

988 if (out == NULL)

990 } else {

991 out = stdout;

994 if (WTERMSIG(*status) == SIGCONT) {

996 * If the beastie has continued, shift the

997 * Job from the stopped list to the running

998 * one (or re-stop it if concurrency is

999 * exceeded) and go and get another child.

1001 if (job->flags & (JOB_RESUME | JOB_RESTART)) {

1002 if (usePipes && job->node != lastNode) {

1004 lastNode = job->node;

1008 if (!(job->flags & JOB_CONTINUING)) {

1009 DEBUGF(JOB, ("Warning: process %jd was not "

1011 #ifdef notdef

1013 * We don't really want to restart a

1014 * job from scratch just because it

1015 * continued, especially not without

1016 * killing the continuing process!

1017 * That's why this is ifdef'ed out.

1018 * FD - 9/17/90

1025 nJobs += 1;

1026 DEBUGF(JOB, ("Process %jd is continuing locally.

",

1028 if (nJobs == maxJobs) {

1029 jobFull = TRUE;

1030 DEBUGF(JOB, ("Job queue is full.

"));

1035 } else {

1036 if (usePipes && job->node != lastNode) {

1038 lastNode = job->node;

1041 "*** Signal %d

", WTERMSIG(*status));

1045 } else {

1046 /* STOPPED */

1047 FILE *out;

1049 if (compatMake && !usePipes && (job->flags & JOB_IGNERR)) {

1051 * If output is going to a file and this job

1052 * is ignoring errors, arrange to have the

1053 * exit status sent to the output file as

1056 out = fdopen(job->outFd, "w");

1057 if (out == NULL)

1059 } else {

1060 out = stdout;

1064 if (usePipes && job->node != lastNode) {

1066 lastNode = job->node;

1068 fprintf(out, "*** Stopped -- signal %d

", WSTOPSIG(*status));

1076 * Now handle the -B-mode stuff. If the beast still isn't finished,

1077 * try and restart the job on the next command. If JobStart says it's

1078 * ok, it's ok. If there's an error, this puppy is done.

1080 if (compatMake && WIFEXITED(*status) &&

1082 switch (JobStart(job->node, job->flags & JOB_IGNDOTS, job)) {

1083 case JOB_RUNNING:

1084 done = FALSE;

1086 case JOB_ERROR:

1087 done = TRUE;

1090 case JOB_FINISHED:

1092 * If we got back a JOB_FINISHED code, JobStart has

1093 * already called Make_Update and freed the job

1094 * descriptor. We set done to false here to avoid fake

1095 * cycles and double frees. JobStart needs to do the

1096 * update so we can proceed up the graph when given

1097 * the -n flag..

1099 done = FALSE;

1104 } else {

1105 done = TRUE;

1108 if (done && aborting != ABORT_ERROR &&

1109 aborting != ABORT_INTERRUPT && *status == 0) {

1111 * As long as we aren't aborting and the job didn't return a

1112 * non-zero status that we shouldn't ignore, we call

1113 * Make_Update to update the parents. In addition, any saved

1114 * commands for the node are placed on the .END target.

1116 for (ln = job->tailCmds; ln != NULL; ln = LST_NEXT(ln)) {

1126 } else if (*status != 0) {

1134 * Set aborting if any error.

1136 if (makeErrors && !keepgoing && aborting != ABORT_INTERRUPT) {

1138 * If we found any errors in this batch of children and the -k

1139 * flag wasn't given, we set the aborting flag so no more jobs

1140 * get started.

1142 aborting = ABORT_ERROR;

1145 if (aborting == ABORT_ERROR && Job_Empty()) {

1147 * If we are aborting and the job table is now empty, we finish.

1155 * Touch the given target. Called by JobStart when the -t flag was

1156 * given. Prints messages unless told to be silent.

1158 * Side Effects:

1159 * The data modification of the file is changed. In addition, if the

1160 * file did not exist, it is created.

1162 void

1163 Job_Touch(GNode *gn, Boolean silent)

1165 int streamID; /* ID of stream opened to do the touch */

1166 struct utimbuf times; /* Times for utime() call */

1168 if (gn->type & (OP_JOIN | OP_USE | OP_EXEC | OP_OPTIONAL)) {

1170 * .JOIN, .USE, .ZEROTIME and .OPTIONAL targets are "virtual"

1171 * targets and, as such, shouldn't really be created.

1176 if (!silent) {

1181 if (noExecute) {

1185 if (gn->type & OP_ARCHV) {

1187 } else if (gn->type & OP_LIB) {

1189 } else {

1190 char *file = gn->path ? gn->path : gn->name;

1193 if (utime(file, ×) < 0) {

1194 streamID = open(file, O_RDWR | O_CREAT, 0666);

1196 if (streamID >= 0) {

1197 char c;

1200 * Read and write a byte to the file to change

1201 * the modification time, then close the file.

1203 if (read(streamID, &c, 1) == 1) {

1209 } else {

1210 fprintf(stdout, "*** couldn't touch %s: %s",

1220 * Make sure the given node has all the commands it needs.

1223 * TRUE if the commands list is/was ok.

1225 * Side Effects:

1226 * The node will have commands from the .DEFAULT rule added to it

1227 * if it needs them.

1229 Boolean

1230 Job_CheckCommands(GNode *gn, void (*abortProc)(const char *, ...))

1233 if (OP_NOP(gn->type) && Lst_IsEmpty(&gn->commands) &&

1236 * No commands. Look for .DEFAULT rule from which we might infer

1239 if (DEFAULT != NULL && !Lst_IsEmpty(&DEFAULT->commands)) {

1241 * Make only looks for a .DEFAULT if the node was

1242 * never the target of an operator, so that's what we

1243 * do too. If a .DEFAULT was given, we substitute its

1244 * commands for gn's commands and set the IMPSRC

1245 * variable to be the target's name The DEFAULT node

1246 * acts like a transformation rule, in that gn also

1247 * inherits any attributes or sources attached to

1253 } else if (Dir_MTime(gn) == 0) {

1255 * The node wasn't the target of an operator we have

1256 * no .DEFAULT rule to go on and the target doesn't

1257 * already exist. There's nothing more we can do for

1258 * this branch. If the -k flag wasn't given, we stop

1259 * in our tracks, otherwise we just don't update

1260 * this node's parents so they never get examined.

1262 static const char msg[] =

1263 "make: don't know how to make";

1265 if (gn->type & OP_OPTIONAL) {

1269 } else if (keepgoing) {

1273 return (FALSE);

1274 } else {

1276 if (strcmp(gn->name,"love") == 0)

1278 else

1282 return (FALSE);

1286 return (TRUE);

1290 * JobExec

1291 * Execute the shell for the given job. Called from JobStart and

1294 * Side Effects:

1295 * A shell is executed, outputs is altered and the Job structure added

1296 * to the job table.

1298 static void

1299 JobExec(Job *job, char **argv)

1301 ProcStuff ps;

1303 if (DEBUG(JOB)) {

1304 int i;

1308 for (i = 0; argv[i] != NULL; i++) {

1315 * Some jobs produce no output and it's disconcerting to have

1316 * no feedback of their running (since they produce no output, the

1317 * banner with their name in it never appears). This is an attempt to

1318 * provide that feedback, even if nothing follows it.

1320 if (lastNode != job->node && (job->flags & JOB_FIRST) &&

1323 lastNode = job->node;

1327 if (usePipes) {

1329 * Set up the child's output to be routed through the

1330 * pipe we've created for it.

1333 } else {

1335 * We're capturing output in a file, so we duplicate

1336 * the descriptor to the temporary file into the

1337 * standard output.

1351 * Fork. Warning since we are doing vfork() instead of fork(),

1352 * do not allocate memory in the child process!

1354 if ((ps.child_pid = vfork()) == -1) {

1358 } else if (ps.child_pid == 0) {

1360 * Child

1362 if (fifoFd >= 0)

1366 /* NOTREACHED */

1370 * Parent

1374 if (usePipes && (job->flags & JOB_FIRST)) {

1376 * The first time a job is run for a node, we set the

1377 * current position in the buffer to the beginning and

1378 * mark another stream to watch in the outputs mask.

1381 struct kevent kev[2];

1389 if (kevent(kqfd, kev, 2, NULL, 0, NULL) != 0) {

1391 * kevent() will fail if the job is already

1392 * finished

1394 if (errno != EINTR && errno != EBADF && errno != ESRCH)

1402 if (job->cmdFILE != NULL && job->cmdFILE != stdout) {

1408 * Now the job is actually running, add it to the table.

1410 nJobs += 1;

1412 if (nJobs == maxJobs) {

1413 jobFull = TRUE;

1418 * JobMakeArgv

1419 * Create the argv needed to execute the shell for a given job.

1421 static void

1422 JobMakeArgv(Job *job, char **argv)

1424 int argc;

1425 static char args[10]; /* For merged arguments */

1428 argc = 1;

1430 if ((commandShell->exit && *commandShell->exit != '-') ||

1433 * At least one of the flags doesn't have a minus before it, so

1434 * merge them together. Have to do this because the *(&(@*#*&#$#

1435 * Bourne shell thinks its second argument is a file to source.

1436 * Grrrr. Note the ten-character limitation on the combined

1444 if (args[1]) {

1448 } else {

1449 if (!(job->flags & JOB_IGNERR) && commandShell->exit) {

1453 if (!(job->flags & JOB_SILENT) && commandShell->echo) {

1462 * JobRestart

1463 * Restart a job that stopped for some reason. The job must be neither

1464 * on the jobs nor on the stoppedJobs list.

1466 * Side Effects:

1467 * jobFull will be set if the job couldn't be run.

1469 static void

1473 if (job->flags & JOB_RESTART) {

1475 * Set up the control arguments to the shell. This is based on

1476 * the flags set earlier for this job. If the JOB_IGNERR flag

1477 * is clear, the 'exit' flag of the commandShell is used to

1478 * cause it to exit upon receiving an error. If the JOB_SILENT

1479 * flag is clear, the 'echo' flag of the commandShell is used

1480 * to get it to start echoing as soon as it starts

1481 * processing commands.

1483 char *argv[4];

1488 if (nJobs >= maxJobs && !(job->flags & JOB_SPECIAL)) {

1490 * Not allowed to run -- put it back on the hold

1491 * queue and mark the table full

1495 jobFull = TRUE;

1496 DEBUGF(JOB, ("Job queue is full.

"));

1498 } else {

1500 * Job may be run locally.

1506 } else {

1508 * The job has stopped and needs to be restarted.

1509 * Why it stopped, we don't know...

1512 if ((nJobs < maxJobs || ((job->flags & JOB_SPECIAL) &&

1513 maxJobs == 0)) && nJobs != maxJobs) {

1515 * If we haven't reached the concurrency limit already

1516 * (or the job must be run and maxJobs is 0), it's ok

1517 * to resume it.

1519 Boolean error;

1520 int status;

1522 error = (KILL(job->pid, SIGCONT) != 0);

1524 if (!error) {

1526 * Make sure the user knows we've continued

1527 * the beast and actually put the thing in the

1528 * job table.

1531 status = 0;

1537 } else {

1538 Error("couldn't resume %s: %s",

1540 status = 0;

1544 } else {

1546 * Job cannot be restarted. Mark the table as full and

1547 * place the job back on the list of stopped jobs.

1551 jobFull = TRUE;

1552 DEBUGF(JOB, ("Job queue is full.

"));

1558 * JobStart

1559 * Start a target-creation process going for the target described

1560 * by the graph node gn.

1563 * JOB_ERROR if there was an error in the commands, JOB_FINISHED

1564 * if there isn't actually anything left to do for the job and

1565 * JOB_RUNNING if the job has been started.

1567 * Side Effects:

1568 * A new Job node is created and added to the list of running

1569 * jobs. PMake is forked and a child shell created.

1571 static int

1572 JobStart(GNode *gn, int flags, Job *previous)

1574 Job *job; /* new job descriptor */

1575 char *argv[4]; /* Argument vector to shell */

1576 Boolean cmdsOK; /* true if the nodes commands were all right */

1577 Boolean noExec; /* Set true if we decide not to run the job */

1578 int tfd; /* File descriptor for temp file */

1579 LstNode *ln;

1580 char tfile[sizeof(TMPPAT)];

1582 if (interrupted) {

1584 return (JOB_ERROR);

1586 if (previous != NULL) {

1588 job = previous;

1589 } else {

1590 job = emalloc(sizeof(Job));

1591 flags |= JOB_FIRST;

1598 * Set the initial value of the flags for this job based on the global

1599 * ones and the node's attributes... Any flags supplied by the caller

1600 * are also added to the field.

1603 if (Targ_Ignore(gn)) {

1606 if (Targ_Silent(gn)) {

1612 * Check the commands now so any attributes from .DEFAULT have a chance

1613 * to migrate to the node.

1615 if (!compatMake && (job->flags & JOB_FIRST)) {

1616 cmdsOK = Job_CheckCommands(gn, Error);

1617 } else {

1618 cmdsOK = TRUE;

1622 * If the -n flag wasn't given, we open up OUR (not the child's)

1623 * temporary file to stuff commands in it. The thing is rd/wr so we

1624 * don't need to reopen it to feed it to the shell. If the -n flag

1625 * *was* given, we just set the file to be stdout. Cute, huh?

1627 if ((gn->type & OP_MAKE) || (!noExecute && !touchFlag)) {

1629 * We're serious here, but if the commands were bogus, we're

1630 * also dead...

1632 if (!cmdsOK) {

1637 if ((tfd = mkstemp(tfile)) == -1)

1638 Punt("Cannot create temp file: %s", strerror(errno));

1641 if (job->cmdFILE == NULL) {

1643 Punt("Could not open %s", tfile);

1647 * Send the commands to the command file, flush all its

1648 * buffers then rewind and remove the thing.

1650 noExec = FALSE;

1653 * Used to be backwards; replace when start doing multiple

1654 * commands per shell.

1656 if (compatMake) {

1658 * Be compatible: If this is the first time for this

1659 * node, verify its commands are ok and open the

1660 * commands list for sequential access by later

1661 * invocations of JobStart. Once that is done, we take

1662 * the next command off the list and print it to the

1663 * command file. If the command was an ellipsis, note

1664 * that there's nothing more to execute.

1666 if (job->flags & JOB_FIRST)

1668 else

1672 if (gn->compat_command == NULL ||

1674 noExec = TRUE;

1676 if (noExec && !(job->flags & JOB_FIRST)) {

1678 * If we're not going to execute anything, the

1679 * job is done and we need to close down the

1680 * various file descriptors we've opened for

1681 * output, then call JobDoOutput to catch the

1682 * final characters or send the file to the

1683 * screen... Note that the i/o streams are only

1684 * open if this isn't the first job. Note also

1685 * that this could not be done in

1686 * Job_CatchChildren b/c it wasn't clear if

1687 * there were more commands to execute or not...

1691 } else {

1693 * We can do all the commands at once. hooray for sanity

1695 numCommands = 0;

1697 if (JobPrintCommand(Lst_Datum(ln), job))

1702 * If we didn't print out any commands to the shell

1703 * script, there's not much point in executing the

1704 * shell, is there?

1706 if (numCommands == 0) {

1707 noExec = TRUE;

1711 } else if (noExecute) {

1713 * Not executing anything -- just print all the commands to

1714 * stdout in one fell swoop. This will still set up

1717 if (lastNode != gn) {

1719 lastNode = gn;

1724 * Only print the commands if they're ok, but don't die if

1725 * they're not -- just let the user know they're bad and keep

1726 * going. It doesn't do any harm in this case and may do

1727 * some good.

1729 if (cmdsOK) {

1731 if (JobPrintCommand(Lst_Datum(ln), job))

1736 * Don't execute the shell, thank you.

1738 noExec = TRUE;

1740 } else {

1742 * Just touch the target and note that no shell should be

1743 * executed. Set cmdFILE to stdout to make life easier. Check

1744 * the commands, too, but don't die if they're no good -- it

1745 * does no harm to keep working up the graph.

1749 noExec = TRUE;

1753 * If we're not supposed to execute a shell, don't.

1755 if (noExec) {

1757 * Unlink and close the command file if we opened one

1759 if (job->cmdFILE != stdout) {

1760 if (job->cmdFILE != NULL)

1762 } else {

1767 * We only want to work our way up the graph if we aren't here

1768 * because the commands for the job were no good.

1770 if (cmdsOK) {

1771 if (aborting == 0) {

1772 for (ln = job->tailCmds; ln != NULL;

1773 ln = LST_NEXT(ln)) {

1783 } else {

1787 } else {

1792 * Set up the control arguments to the shell. This is based on the flags

1793 * set earlier for this job.

1798 * If we're using pipes to catch output, create the pipe by which we'll

1799 * get the shell's output. If we're using files, print out that we're

1800 * starting a job and then set up its temporary-file name.

1802 if (!compatMake || (job->flags & JOB_FIRST)) {

1803 if (usePipes) {

1804 int fd[2];

1806 if (pipe(fd) == -1)

1807 Punt("Cannot create pipe: %s", strerror(errno));

1812 } else {

1816 if ((job->outFd = mkstemp(job->outFile)) == -1)

1817 Punt("cannot create temp file: %s",

1823 if (nJobs >= maxJobs && !(job->flags & JOB_SPECIAL) && maxJobs != 0) {

1825 * We've hit the limit of concurrency, so put the job on hold

1826 * until some other job finishes. Note that the special jobs

1827 * (.BEGIN, .INTERRUPT and .END) may be run even when the

1828 * limit has been reached (e.g. when maxJobs == 0).

1830 jobFull = TRUE;

1832 DEBUGF(JOB, ("Can only run job locally.

"));

1835 } else {

1836 if (nJobs >= maxJobs) {

1838 * If we're running this job as a special case

1839 * (see above), at least say the table is full.

1841 jobFull = TRUE;

1842 DEBUGF(JOB, ("Local job queue is full.

"));

1846 return (JOB_RUNNING);

1849 static char *

1850 JobOutput(Job *job, char *cp, char *endp, int msg)

1852 char *ecp;

1854 if (commandShell->noPrint) {

1855 ecp = strstr(cp, commandShell->noPrint);

1856 while (ecp != NULL) {

1857 if (cp != ecp) {

1859 if (msg && job->node != lastNode) {

1861 lastNode = job->node;

1864 * The only way there wouldn't be a newline

1865 * after this line is if it were the last in

1866 * the buffer. However, since the non-printable

1867 * comes after it, there must be a newline, so

1868 * we don't print one.

1873 cp = ecp + strlen(commandShell->noPrint);

1874 if (cp != endp) {

1876 * Still more to print, look again after

1877 * skipping the whitespace following the

1881 while (*cp == ' ' || *cp == '\t' ||

1885 ecp = strstr(cp, commandShell->noPrint);

1886 } else {

1887 return (cp);

1891 return (cp);

1895 * JobDoOutput

1896 * This function is called at different times depending on

1897 * whether the user has specified that output is to be collected

1898 * via pipes or temporary files. In the former case, we are called

1899 * whenever there is something to read on the pipe. We collect more

1900 * output from the given job and store it in the job's outBuf. If

1901 * this makes up a line, we print it tagged by the job's identifier,

1902 * as necessary.

1903 * If output has been collected in a temporary file, we open the

1904 * file and read it line by line, transfering it to our own

1905 * output channel until the file is empty. At which point we

1906 * remove the temporary file.

1907 * In both cases, however, we keep our figurative eye out for the

1908 * 'noPrint' line for the shell from which the output came. If

1909 * we recognize a line, we don't print it. If the command is not

1910 * alone on the line (the character after it is not \0 or

), we

1911 * do print whatever follows it.

1913 * Side Effects:

1914 * curPos may be shifted as may the contents of outBuf.

1916 static void

1917 JobDoOutput(Job *job, Boolean finish)

1919 Boolean gotNL = FALSE; /* true if got a newline */

1920 Boolean fbuf; /* true if our buffer filled up */

1921 int nr; /* number of bytes read */

1922 int i; /* auxiliary index into outBuf */

1923 int max; /* limit for i (end of current data) */

1924 int nRead; /* (Temporary) number of bytes read */

1925 FILE *oFILE; /* Stream pointer to shell's output file */

1926 char inLine[132];

1928 if (usePipes) {

1930 * Read as many bytes as will fit in the buffer.

1933 gotNL = FALSE;

1934 fbuf = FALSE;

1936 nRead = read(job->inPipe, &job->outBuf[job->curPos],

1939 * Check for interrupt here too, because the above read may

1940 * block when the child process is stopped. In this case the

1941 * interrupt will unblock it (we don't use SA_RESTART).

1943 if (interrupted)

1946 if (nRead < 0) {

1948 nr = 0;

1949 } else {

1950 nr = nRead;

1954 * If we hit the end-of-file (the job is dead), we must flush

1955 * its remaining output, so pretend we read a newline if

1956 * there's any output remaining in the buffer.

1957 * Also clear the 'finish' flag so we stop looping.

1959 if (nr == 0 && job->curPos != 0) {

1961 nr = 1;

1962 finish = FALSE;

1963 } else if (nr == 0) {

1964 finish = FALSE;

1968 * Look for the last newline in the bytes we just got. If there

1969 * is one, break out of the loop with 'i' as its index and

1970 * gotNL set TRUE.

1972 max = job->curPos + nr;

1973 for (i = job->curPos + nr - 1; i >= job->curPos; i--) {

1974 if (job->outBuf[i] == '

') {

1975 gotNL = TRUE;

1977 } else if (job->outBuf[i] == '\0') {

1985 if (!gotNL) {

1987 if (job->curPos == JOB_BUFSIZE) {

1989 * If we've run out of buffer space, we have

1990 * no choice but to print the stuff. sigh.

1992 fbuf = TRUE;

1993 i = job->curPos;

1996 if (gotNL || fbuf) {

1998 * Need to send the output to the screen. Null terminate

1999 * it first, overwriting the newline character if there

2000 * was one. So long as the line isn't one we should

2001 * filter (according to the shell description), we print

2002 * the line, preceded by a target banner if this target

2003 * isn't the same as the one for which we last printed

2004 * something. The rest of the data in the buffer are

2005 * then shifted down to the start of the buffer and

2006 * curPos is set accordingly.

2009 if (i >= job->curPos) {

2010 char *cp;

2012 cp = JobOutput(job, job->outBuf,

2016 * There's still more in that buffer. This time,

2017 * though, we know there's no newline at the

2018 * end, so we add one of our own free will.

2020 if (*cp != '\0') {

2021 if (job->node != lastNode) {

2023 lastNode = job->node;

2026 gotNL ? "

" : "");

2030 if (i < max - 1) {

2031 /* shift the remaining characters down */

2033 max - (i + 1));

2034 job->curPos = max - (i + 1);

2036 } else {

2038 * We have written everything out, so we just

2039 * start over from the start of the buffer.

2040 * No copying. No nothing.

2045 if (finish) {

2047 * If the finish flag is true, we must loop until we hit

2048 * end-of-file on the pipe. This is guaranteed to happen

2049 * eventually since the other end of the pipe is now

2050 * closed (we closed it explicitly and the child has

2051 * exited). When we do get an EOF, finish will be set

2052 * FALSE and we'll fall through and out.

2054 goto end_loop;

2057 } else {

2059 * We've been called to retrieve the output of the job from the

2060 * temporary file where it's been squirreled away. This consists

2061 * of opening the file, reading the output line by line, being

2062 * sure not to print the noPrint line for the shell we used,

2063 * then close and remove the temporary file. Very simple.

2065 * Change to read in blocks and do FindSubString type things

2066 * as for pipes? That would allow for "@echo -n..."

2068 oFILE = fopen(job->outFile, "r");

2069 if (oFILE != NULL) {

2070 fprintf(stdout, "Results of making %s:

",

2074 while (fgets(inLine, sizeof(inLine), oFILE) != NULL) {

2075 char *cp, *endp, *oendp;

2077 cp = inLine;

2078 oendp = endp = inLine + strlen(inLine);

2079 if (endp[-1] == '

') {

2082 cp = JobOutput(job, inLine, endp, FALSE);

2085 * There's still more in that buffer. This time,

2086 * though, we know there's no newline at the

2087 * end, so we add one of our own free will.

2091 if (endp != oendp) {

2104 * Handle the exit of a child. Called from Make_Make.

2106 * Side Effects:

2107 * The job descriptor is removed from the list of children.

2110 * We do waits, blocking or not, according to the wisdom of our

2111 * caller, until there are no more children to report. For each

2112 * job, call JobFinish to finish things off. This will take care of

2113 * putting jobs on the stoppedJobs queue.

2115 void

2118 pid_t pid; /* pid of dead child */

2119 Job *job; /* job descriptor for dead child */

2120 int status; /* Exit/termination status */

2123 * Don't even bother if we know there's no one around.

2125 if (nJobs == 0) {

2129 for (;;) {

2130 pid = waitpid((pid_t)-1, &status,

2131 (block ? 0 : WNOHANG) | WUNTRACED);

2132 if (pid <= 0)

2135 DEBUGF(JOB, ("Process %jd exited or stopped.

",

2139 if (job->pid == pid)

2143 if (job == NULL) {

2144 if (WIFSIGNALED(status) &&

2147 if (job->pid == pid)

2150 if (job == NULL) {

2151 Error("Resumed child (%jd) "

2152 "not in table", (intmax_t)pid);

2156 } else {

2157 Error("Child (%jd) not in table?",

2161 } else {

2163 nJobs -= 1;

2164 if (fifoFd >= 0 && maxJobs > 1) {

2167 if (nJobs >= maxJobs)

2168 jobFull = TRUE;

2169 else

2170 jobFull = FALSE;

2171 } else {

2172 DEBUGF(JOB, ("Job queue is no longer full.

"));

2173 jobFull = FALSE;

2179 if (interrupted)

2185 * Catch the output from our children, if we're using

2186 * pipes do so. Otherwise just block time until we get a

2187 * signal(most likely a SIGCHLD) since there's no point in

2188 * just spinning when there's nothing to do and the reaping

2189 * of a child can wait for a while.

2191 * Side Effects:

2192 * Output is read from pipes if we're piping.

2195 void

2197 Job_CatchOutput(int flag __unused)

2202 int nfds;

2204 #define KEV_SIZE 4

2205 struct kevent kev[KEV_SIZE];

2206 int i;

2208 struct timeval timeout;

2210 Job *job;

2215 if (usePipes) {

2217 if ((nfds = kevent(kqfd, NULL, 0, kev, KEV_SIZE, NULL)) == -1) {

2218 if (errno != EINTR)

2220 if (interrupted)

2222 } else {

2223 for (i = 0; i < nfds; i++) {

2224 if (kev[i].flags & EV_ERROR) {

2228 switch (kev[i].filter) {

2229 case EVFILT_READ:

2232 case EVFILT_PROC:

2234 * Just wake up and let

2235 * Job_CatchChildren() collect the

2236 * terminated job.

2243 readfds = outputs;

2246 if (flag && jobFull && fifoFd >= 0)

2249 nfds = select(FD_SETSIZE, &readfds, (fd_set *)NULL,

2251 if (nfds <= 0) {

2252 if (interrupted)

2256 if (fifoFd >= 0 && FD_ISSET(fifoFd, &readfds)) {

2257 if (--nfds <= 0)

2260 job = TAILQ_FIRST(&jobs);

2261 while (nfds != 0 && job != NULL) {

2262 if (FD_ISSET(job->inPipe, &readfds)) {

2266 job = TAILQ_NEXT(job, link);

2274 * Start the creation of a target. Basically a front-end for

2275 * JobStart used by the Make module.

2277 * Side Effects:

2278 * Another job is started.

2280 void

2287 void

2291 if (targPrefix) {

2293 } else if (!Var_Exists(MAKE_JOB_PREFIX, VAR_GLOBAL)) {

2296 targPrefix = Var_Subst("${" MAKE_JOB_PREFIX "}", VAR_GLOBAL, 0)->buf;

2301 * Initialize the process module, given a maximum number of jobs.

2303 * Side Effects:

2304 * lists and counters are initialized

2306 void

2309 GNode *begin; /* node for commands to do at the very start */

2310 const char *env;

2311 struct sigaction sa;

2313 fifoFd = -1;

2314 env = getenv("MAKE_JOBS_FIFO");

2316 if (env == NULL && maxproc > 1) {

2318 * We did not find the environment variable so we are the

2319 * leader. Create the fifo, open it, write one char per

2320 * allowed job into the pipe.

2322 fifoFd = mkfifotemp(fifoName);

2323 if (fifoFd < 0) {

2324 env = NULL;

2325 } else {

2326 fifoMaster = 1;

2328 env = fifoName;

2330 while (maxproc-- > 0) {

2333 /* The master make does not get a magic token */

2334 jobFull = TRUE;

2335 maxJobs = 0;

2338 } else if (env != NULL) {

2340 * We had the environment variable so we are a slave.

2341 * Open fifo and give ourselves a magic token which represents

2342 * the token our parent make has grabbed to start his make

2343 * process. Otherwise the sub-makes would gobble up tokens and

2344 * the proper number of tokens to specify to -j would depend

2345 * on the depth of the tree and the order of execution.

2347 fifoFd = open(env, O_RDWR, 0);

2348 if (fifoFd >= 0) {

2350 maxJobs = 1;

2351 jobFull = FALSE;

2354 if (fifoFd < 0) {

2355 maxJobs = maxproc;

2356 jobFull = FALSE;

2357 } else {

2359 nJobs = 0;

2361 aborting = 0;

2362 makeErrors = 0;

2364 lastNode = NULL;

2365 if ((maxJobs == 1 && fifoFd < 0) || !beVerbose || is_posix || beQuiet) {

2367 * If only one job can run at a time, there's no need for a

2368 * banner, no is there?

2370 targFmt = "";

2371 } else {

2372 targFmt = TARG_FMT;

2376 * Catch the four signals that POSIX specifies if they aren't ignored.

2377 * JobCatchSignal will just set global variables and hope someone

2378 * else is going to handle the interrupt.

2384 if (signal(SIGINT, SIG_IGN) != SIG_IGN) {

2387 if (signal(SIGHUP, SIG_IGN) != SIG_IGN) {

2390 if (signal(SIGQUIT, SIG_IGN) != SIG_IGN) {

2393 if (signal(SIGTERM, SIG_IGN) != SIG_IGN) {

2397 * There are additional signals that need to be caught and passed if

2398 * either the export system wants to be told directly of signals or if

2399 * we're giving each job its own process group (since then it won't get

2400 * signals from the terminal driver as we own the terminal)

2403 if (signal(SIGTSTP, SIG_IGN) != SIG_IGN) {

2406 if (signal(SIGTTOU, SIG_IGN) != SIG_IGN) {

2409 if (signal(SIGTTIN, SIG_IGN) != SIG_IGN) {

2412 if (signal(SIGWINCH, SIG_IGN) != SIG_IGN) {

2418 if ((kqfd = kqueue()) == -1) {

2423 begin = Targ_FindNode(".BEGIN", TARG_NOCREATE);

2425 if (begin != NULL) {

2427 while (nJobs) {

2432 postCommands = Targ_FindNode(".END", TARG_CREATE);

2437 * See if the job table is full. It is considered full if it is OR

2438 * if we are in the process of aborting OR if we have

2439 * reached/exceeded our local quota. This prevents any more jobs

2440 * from starting up.

2443 * TRUE if the job table is full, FALSE otherwise

2445 Boolean

2448 char c;

2449 int i;

2451 if (aborting)

2452 return (aborting);

2453 if (fifoFd >= 0 && jobFull) {

2454 i = read(fifoFd, &c, 1);

2455 if (i > 0) {

2457 jobFull = FALSE;

2460 return (jobFull);

2465 * See if the job table is empty. Because the local concurrency may

2466 * be set to 0, it is possible for the job table to become empty,

2467 * while the list of stoppedJobs remains non-empty. In such a case,

2468 * we want to restart as many jobs as we can.

2471 * TRUE if it is. FALSE if it ain't.

2473 Boolean

2476 if (nJobs == 0) {

2477 if (!TAILQ_EMPTY(&stoppedJobs) && !aborting) {

2479 * The job table is obviously not full if it has no

2480 * jobs in it...Try and restart the stopped jobs.

2482 jobFull = FALSE;

2484 return (FALSE);

2485 } else {

2486 return (TRUE);

2488 } else {

2489 return (FALSE);

2494 * JobInterrupt

2495 * Handle the receipt of an interrupt.

2497 * Side Effects:

2498 * All children are killed. Another job will be started if the

2499 * .INTERRUPT target was given.

2501 static void

2502 JobInterrupt(int runINTERRUPT, int signo)

2504 Job *job; /* job descriptor in that element */

2505 GNode *interrupt; /* the node describing the .INTERRUPT target */

2507 aborting = ABORT_INTERRUPT;

2510 if (!Targ_Precious(job->node)) {

2511 char *file = (job->node->path == NULL ?

2514 if (!noExecute && eunlink(file) != -1) {

2518 if (job->pid) {

2519 DEBUGF(JOB, ("JobInterrupt passing signal to child "

2525 if (runINTERRUPT && !touchFlag) {

2527 * clear the interrupted flag because we would get an

2528 * infinite loop otherwise.

2530 interrupted = 0;

2532 interrupt = Targ_FindNode(".INTERRUPT", TARG_NOCREATE);

2533 if (interrupt != NULL) {

2534 ignoreErrors = FALSE;

2537 while (nJobs) {

2543 if (fifoMaster)

2549 * Do final processing such as the running of the commands

2550 * attached to the .END target.

2555 void

2559 if (postCommands != NULL && !Lst_IsEmpty(&postCommands->commands)) {

2560 if (makeErrors) {

2561 Error("Errors reported so .END ignored");

2562 } else {

2565 while (nJobs) {

2571 if (fifoFd >= 0) {

2573 fifoFd = -1;

2574 if (fifoMaster)

2581 * Waits for all running jobs to finish and returns. Sets 'aborting'

2582 * to ABORT_WAIT to prevent other jobs from starting.

2584 * Side Effects:

2585 * Currently running jobs finish.

2587 void

2591 aborting = ABORT_WAIT;

2592 while (nJobs != 0) {

2596 aborting = 0;

2601 * Abort all currently running jobs without handling output or anything.

2602 * This function is to be called only in the event of a major

2603 * error. Most definitely NOT to be called from JobInterrupt.

2605 * Side Effects:

2606 * All children are killed, not just the firstborn

2608 void

2611 Job *job; /* the job descriptor in that element */

2612 int foo;

2614 aborting = ABORT_ERROR;

2616 if (nJobs) {

2619 * kill the child process with increasingly drastic

2620 * signals to make darn sure it's dead.

2628 * Catch as many children as want to report in at first, then give up

2630 while (waitpid((pid_t)-1, &foo, WNOHANG) > 0)

2635 * JobRestartJobs

2636 * Tries to restart stopped jobs if there are slots available.

2637 * Note that this tries to restart them regardless of pending errors.

2638 * It's not good to leave stopped jobs lying around!

2640 * Side Effects:

2641 * Resumes(and possibly migrates) jobs.

2643 static void

2646 Job *job;

2648 while (!jobFull && (job = TAILQ_FIRST(&stoppedJobs)) != NULL) {

2649 DEBUGF(JOB, ("Job queue is not full. "

2650 "Restarting a stopped job.

"));

2658 * Execute the command in cmd, and return the output of that command

2659 * in a string.

2662 * A string containing the output of the command, or the empty string

2663 * If error is not NULL, it contains the reason for the command failure

2664 * Any output sent to stderr in the child process is passed to stderr,

2665 * and not captured in the string.

2667 * Side Effects:

2668 * The string must be freed by the caller.

2670 Buffer *

2671 Cmd_Exec(const char *cmd, const char **error)

2673 int fds[2]; /* Pipe streams */

2674 int status; /* command exit status */

2675 Buffer *buf; /* buffer to store the result */

2677 ProcStuff ps;

2680 buf = Buf_Init(0);

2683 * Open a pipe for fetching its output

2685 if (pipe(fds) == -1) {

2686 *error = "Couldn't create pipe for \"%s\"";

2687 return (buf);

2690 /* Set close-on-exec on read side of pipe. */

2701 /* Set up arguments for shell */

2710 * Fork. Warning since we are doing vfork() instead of fork(),

2711 * do not allocate memory in the child process!

2713 if ((ps.child_pid = vfork()) == -1) {

2714 *error = "Couldn't exec \"%s\"";

2715 return (buf);

2717 } else if (ps.child_pid == 0) {

2719 * Child

2722 /* NOTREACHED */

2730 close(fds[1]); /* No need for the writing half of the pipe. */

2732 do {

2733 char result[BUFSIZ];

2735 rcnt = read(fds[0], result, sizeof(result));

2736 if (rcnt != -1)

2738 } while (rcnt > 0 || (rcnt == -1 && errno == EINTR));

2740 if (rcnt == -1)

2741 *error = "Error reading shell's output for \"%s\"";

2744 * Close the input side of the pipe.

2748 status = ProcWait(&ps);

2750 if (status)

2751 *error = "\"%s\" returned non-zero status";

2755 return (buf);

2760 * Interrupt handler - set flag and defer handling to the main code

2762 static void

2766 interrupted = signo;

2771 * CompatInterrupt --

2772 * Interrupt the creation of the current target and remove it if

2773 * it ain't precious.

2778 * Side Effects:

2779 * The target is removed and the process exits. If .INTERRUPT exists,

2780 * its commands are run first WITH INTERRUPTS IGNORED..

2784 static void

2787 GNode *gn;

2789 LstNode *ln;

2798 /* prevent recursion in evaluation of .INTERRUPT */

2799 interrupted = 0;

2801 if (curTarg != NULL && !Targ_Precious(curTarg)) {

2802 const char *file = Var_Value(TARGET, curTarg);

2804 if (!noExecute && eunlink(file) != -1) {

2810 * Run .INTERRUPT only if hit with interrupt signal

2812 if (signo == SIGINT) {

2813 gn = Targ_FindNode(".INTERRUPT", TARG_NOCREATE);

2814 if (gn != NULL) {

2816 if (Compat_RunCommand(Lst_Datum(ln), gn))

2824 if (signo == SIGQUIT)

2831 * shellneed

2834 * Returns NULL if a specified line must be executed by the shell,

2835 * and an argument vector if it can be run via execvp().

2837 * Side Effects:

2838 * Uses brk_string so destroys the contents of argv.

2840 static char **

2841 shellneed(ArgArray *aa, char *cmd)

2843 char **p;

2844 int ret;

2846 if (commandShell->meta == NULL || commandShell->builtins.argc <= 1)

2847 /* use shell */

2848 return (NULL);

2850 if (strpbrk(cmd, commandShell->meta) != NULL)

2851 return (NULL);

2854 * Break the command into words to form an argument

2855 * vector we can execute.

2858 for (p = commandShell->builtins.argv + 1; *p != 0; p++) {

2859 if ((ret = strcmp(aa->argv[1], *p)) == 0) {

2860 /* found - use shell */

2862 return (NULL);

2864 if (ret < 0) {

2865 /* not found */

2869 return (aa->argv + 1);

2873 * Execute the next command for a target. If the command returns an

2874 * error, the node's made field is set to ERROR and creation stops.

2875 * The node from which the command came is also given. This is used

2876 * to execute the commands in compat mode and when executing commands

2877 * with the '+' flag in non-compat mode. In these modes each command

2878 * line should be executed by its own shell. We do some optimisation here:

2879 * if the shell description defines both a string of meta characters and

2880 * a list of builtins and the command line neither contains a meta character

2881 * nor starts with one of the builtins then we execute the command directly

2882 * without invoking a shell.

2885 * 0 if the command succeeded, 1 if an error occurred.

2887 * Side Effects:

2888 * The node's 'made' field may be set to ERROR.

2890 static int

2891 Compat_RunCommand(char *cmd, GNode *gn)

2893 ArgArray aa;

2894 char *cmdStart; /* Start of expanded command */

2895 Boolean silent; /* Don't print command */

2896 Boolean doit; /* Execute even in -n */

2897 Boolean errCheck; /* Check errors */

2898 int reason; /* Reason for child's death */

2899 int status; /* Description of child's death */

2900 LstNode *cmdNode; /* Node where current cmd is located */

2901 char **av; /* Argument vector for thing to exec */

2902 ProcStuff ps;

2904 silent = gn->type & OP_SILENT;

2905 errCheck = !(gn->type & OP_IGNORE);

2906 doit = FALSE;

2908 cmdNode = Lst_Member(&gn->commands, cmd);

2909 cmdStart = Buf_Peel(Var_Subst(cmd, gn, FALSE));

2912 * brk_string will return an argv with a NULL in av[0], thus causing

2913 * execvp() to choke and die horribly. Besides, how can we execute a

2914 * null command? In any case, we warn the user that the command

2915 * expanded to nothing (is this the right thing to do?).

2917 if (*cmdStart == '\0') {

2919 Error("%s expands to empty string", cmd);

2920 return (0);

2921 } else {

2922 cmd = cmdStart;

2926 if ((gn->type & OP_SAVE_CMDS) && (gn != ENDNode)) {

2928 return (0);

2929 } else if (strcmp(cmdStart, "...") == 0) {

2931 return (0);

2934 while (*cmd == '@' || *cmd == '-' || *cmd == '+') {

2935 switch (*cmd) {

2937 case '@':

2938 silent = DEBUG(LOUD) ? FALSE : TRUE;

2941 case '-':

2942 errCheck = FALSE;

2945 case '+':

2946 doit = TRUE;

2952 while (isspace((unsigned char)*cmd))

2956 * Print the command before echoing if we're not supposed to be quiet

2957 * for this one. We also print the command if -n given, but not if '+'.

2959 if (!silent || (noExecute && !doit)) {

2965 * If we're not supposed to execute any commands, this is as far as

2966 * we go...

2968 if (!doit && noExecute) {

2969 return (0);

2980 if ((av = shellneed(&aa, cmd)) == NULL) {

2982 * Shell meta character or shell builtin found - pass

2983 * command to shell. We give the shell the -e flag as

2984 * well as -c if it is supposed to exit when it hits an error.

2992 } else {

2999 * Warning since we are doing vfork() instead of fork(),

3000 * do not allocate memory in the child process!

3002 if ((ps.child_pid = vfork()) == -1) {

3003 Fatal("Could not fork");

3005 } else if (ps.child_pid == 0) {

3007 * Child

3010 /* NOTREACHED */

3012 } else {

3013 if (ps.argv_free) {

3018 } else {

3023 * we need to print out the command associated with this

3024 * Gnode in Targ_PrintCmd from Targ_PrintGraph when debugging

3025 * at level g2, in main(), Fatal() and DieHorribly(),

3026 * therefore do not free it when debugging.

3028 if (!DEBUG(GRAPH2)) {

3033 * The child is off and running. Now all we can do is wait...

3035 reason = ProcWait(&ps);

3037 if (interrupted)

3041 * Decode and report the reason child exited, then

3042 * indicate how we handled it.

3044 if (WIFEXITED(reason)) {

3045 status = WEXITSTATUS(reason);

3046 if (status == 0) {

3047 return (0);

3048 } else {

3049 printf("*** Error code %d", status);

3051 } else if (WIFSTOPPED(reason)) {

3052 status = WSTOPSIG(reason);

3053 } else {

3054 status = WTERMSIG(reason);

3055 printf("*** Signal %d", status);

3058 if (ps.errCheck) {

3060 if (keepgoing) {

3062 * Abort the current

3063 * target, but let

3064 * others continue.

3068 return (status);

3069 } else {

3071 * Continue executing

3072 * commands for this target.

3073 * If we return 0, this will

3077 return (0);

3085 * Make a target, given the parent, to abort if necessary.

3087 * Side Effects:

3088 * If an error is detected and not being ignored, the process exits.

3092 int

3093 Compat_Make(GNode *gn, GNode *pgn)

3095 LstNode *ln;

3097 if (gn->type & OP_USE) {

3100 } else if (gn->made == UNMADE) {

3102 * First mark ourselves to be made, then apply whatever

3103 * transformations the suffix module thinks are necessary.

3104 * Once that's done, we can descend and make all our children.

3105 * If any of them has an error but the -k flag was given, our

3106 * 'make' field will be set FALSE again. This is our signal to

3107 * not attempt to do anything but abort our parent as well.

3114 if (!gn->make) {

3117 return (0);

3120 if (Lst_Member(&gn->iParents, pgn) != NULL) {

3125 * All the children were made ok. Now cmtime contains the

3126 * modification time of the newest child, we need to find out

3127 * if we exist and when we were modified last. The criteria for

3128 * datedness are defined by the Make_OODate function.

3131 if (!Make_OODate(gn)) {

3134 return (0);

3135 } else {

3140 * If the user is just seeing if something is out-of-date,

3141 * exit now to tell him/her "yes".

3143 if (queryFlag) {

3148 * We need to be re-made. We also have to make sure we've got

3149 * a $? variable. To be nice, we also define the $> variable

3150 * using Make_DoAllVar().

3155 * Alter our type to tell if errors should be ignored or things

3156 * should not be printed so Compat_RunCommand knows what to do.

3158 if (Targ_Ignore(gn)) {

3161 if (Targ_Silent(gn)) {

3165 if (Job_CheckCommands(gn, Fatal)) {

3167 * Our commands are ok, but we still have to worry

3168 * about the -t flag...

3170 if (!touchFlag) {

3171 curTarg = gn;

3173 if (Compat_RunCommand(Lst_Datum(ln),

3177 curTarg = NULL;

3178 } else {

3181 } else {

3185 if (gn->made != ERROR) {

3187 * If the node was made successfully, mark it so, update

3188 * its modification time and timestamp all its parents.

3189 * Note that for .ZEROTIME targets, the timestamping

3190 * isn't done. This is to keep its state from affecting

3191 * that of its parent.

3194 #ifndef RECHECK

3196 * We can't re-stat the thing, but we can at least take

3197 * care of rules where a target depends on a source that

3198 * actually creates the target, but only if it has

3204 * yacc -d parse.y

3205 * cc -c y.tab.c

3206 * mv y.tab.o parse.o

3207 * cmp -s y.tab.h parse.h || mv y.tab.h parse.h

3209 * In this case, if the definitions produced by yacc

3210 * haven't changed from before, parse.h won't have been

3211 * updated and gn->mtime will reflect the current

3212 * modification time for parse.h. This is something of a

3213 * kludge, I admit, but it's a useful one..

3215 * XXX: People like to use a rule like

3219 * To force things that depend on FRC to be made, so we

3220 * have to check for gn->children being empty as well...

3222 if (!Lst_IsEmpty(&gn->commands) ||

3228 * This is what Make does and it's actually a good

3229 * thing, as it allows rules like

3231 * cmp -s y.tab.h parse.h || cp y.tab.h parse.h

3233 * to function as intended. Unfortunately, thanks to

3234 * the stateless nature of NFS (and the speed of this

3235 * program), there are times when the modification time

3236 * of a file created on a remote machine will not be

3237 * modified before the stat() implied by the Dir_MTime

3238 * occurs, thus leading us to believe that the file

3239 * is unchanged, wreaking havoc with files that depend

3240 * on this one.

3242 * I have decided it is better to make too much than to

3243 * make too little, so this stuff is commented out

3244 * unless you're sure it's ok.

3245 * -- ardeb 1/12/88

3247 if (noExecute || Dir_MTime(gn) == 0) {

3250 if (gn->cmtime > gn->mtime)

3255 if (!(gn->type & OP_EXEC)) {

3260 } else if (keepgoing) {

3263 } else {

3264 printf("



Stop in %s.

", Var_Value(".CURDIR", gn));

3267 } else if (gn->made == ERROR) {

3269 * Already had an error when making this beastie. Tell the

3270 * parent to abort.

3273 } else {

3274 if (Lst_Member(&gn->iParents, pgn) != NULL) {

3278 case BEINGMADE:

3279 Error("Graph cycles through %s

", gn->name);

3283 case MADE:

3284 if ((gn->type & OP_EXEC) == 0) {

3289 case UPTODATE:

3290 if ((gn->type & OP_EXEC) == 0) {

3299 return (0);

3303 * Install signal handlers for Compat_Run

3305 void

3309 if (signal(SIGINT, SIG_IGN) != SIG_IGN) {

3312 if (signal(SIGTERM, SIG_IGN) != SIG_IGN) {

3315 if (signal(SIGHUP, SIG_IGN) != SIG_IGN) {

3318 if (signal(SIGQUIT, SIG_IGN) != SIG_IGN) {

3326 * Start making again, given a list of target nodes.

3331 * Side Effects:

3332 * Guess what?

3336 void

3339 GNode *gn = NULL; /* Current root target */

3340 LstNode *ln;

3343 ENDNode = Targ_FindNode(".END", TARG_CREATE);

3345 * If the user has defined a .BEGIN target, execute the commands

3346 * attached to it.

3348 if (!queryFlag) {

3349 gn = Targ_FindNode(".BEGIN", TARG_NOCREATE);

3350 if (gn != NULL) {

3352 if (Compat_RunCommand(Lst_Datum(ln), gn))

3355 if (gn->made == ERROR) {

3363 * For each entry in the list of targets to create, call Compat_Make on

3364 * it to create the thing. Compat_Make will leave the 'made' field of gn

3365 * in one of several states:

3366 * UPTODATE gn was already up-to-date

3367 * MADE gn was recreated successfully

3368 * ERROR An error occurred while gn was being created

3369 * ABORTED gn was not remade because one of its inferiors

3370 * could not be made due to errors.

3372 makeErrors = 0;

3373 while (!Lst_IsEmpty(targs)) {

3374 gn = Lst_DeQueue(targs);

3377 if (gn->made == UPTODATE) {

3378 printf("`%s' is up to date.

", gn->name);

3379 } else if (gn->made == ABORTED) {

3380 printf("`%s' not remade because of errors.

",

3387 * If the user has defined a .END target, run its commands.

3389 if (makeErrors == 0) {