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
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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.
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17 * notice, this list of conditions and the following disclaimer in the
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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.
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29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
39 * @(#)job.c 8.2 (Berkeley) 3/19/94
40 * $FreeBSD: src/usr.bin/make/job.c,v 1.75 2005/02/10 14:32:14 harti Exp $
41 * $DragonFly: src/usr.bin/make/job.c,v 1.82 2005/04/28 18:47:09 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_ParseShell Given the line following a .SHELL target, parse the
79 * line as a shell specification. Returns FAILURE if the
82 * Job_Finish Perform any final processing which needs doing. This
83 * includes the execution of any commands which have
84 * been/were attached to the .END target. It should only
85 * be called when the job table is empty.
87 * Job_AbortAll Abort all currently running jobs. It doesn't handle
88 * output or do anything for the jobs, just kills them.
89 * It should only be called in an emergency, as it were.
92 * Verify that the commands for a target are ok. Provide
93 * them if necessary and possible.
95 * Job_Touch Update a target without really updating it.
97 * Job_Wait Wait for all currently-running jobs to finish.
100 * The routines in this file implement the full-compatibility
101 * mode of PMake. Most of the special functionality of PMake
102 * is available in this mode. Things not supported:
103 * - different shells.
104 * - friendly variable substitution.
107 * Compat_Run Initialize things for this module and recreate
108 * thems as need creatin'
111 #include <sys/queue.h>
112 #include <sys/types.h>
113 #include <sys/select.h>
114 #include <sys/stat.h>
116 #include <sys/event.h>
118 #include <sys/wait.h>
122 #include <inttypes.h>
138 #include "pathnames.h"
145 #define TMPPAT "/tmp/makeXXXXXXXXXX"
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 * Shell Specifications:
271 * Some special stuff goes on if a shell doesn't have error control. In such
272 * a case, errCheck becomes a printf template for echoing the command,
273 * should echoing be on and ignErr becomes another printf template for
274 * executing the command while ignoring the return status. If either of these
275 * strings is empty when hasErrCtl is FALSE, the command will be executed
276 * anyway as is and if it causes an error, so be it.
278 #define DEF_SHELL_STRUCT(TAG, CONST) \
281 * the name of the shell. For Bourne and C shells, this is used \
282 * only to find the shell description when used as the single \
283 * source of a .SHELL target. For user-defined shells, this is \
284 * the full path of the shell. \
288 /* True if both echoOff and echoOn defined */ \
289 Boolean hasEchoCtl; \
291 CONST char *echoOff; /* command to turn off echo */ \
292 CONST char *echoOn; /* command to turn it back on */\
295 * What the shell prints, and its length, when given the \
296 * echo-off command. This line will not be printed when \
297 * received from the shell. This is usually the command which \
298 * was executed to turn off echoing \
300 CONST char *noPrint; \
302 /* set if can control error checking for individual commands */ \
305 /* string to turn error checking on */ \
306 CONST char *errCheck; \
308 /* string to turn off error checking */ \
309 CONST char *ignErr; \
311 CONST char *echo; /* command line flag: echo commands */ \
312 CONST char *exit; /* command line flag: exit on error */ \
315 DEF_SHELL_STRUCT(Shell,);
316 DEF_SHELL_STRUCT(CShell, const);
319 * error handling variables
321 static int errors = 0; /* number of errors reported */
322 static int aborting = 0; /* why is the make aborting? */
323 #define ABORT_ERROR 1 /* Because of an error */
324 #define ABORT_INTERRUPT 2 /* Because it was interrupted */
325 #define ABORT_WAIT 3 /* Waiting for jobs to finish */
328 * XXX: Avoid SunOS bug... FILENO() is fp->_file, and file
329 * is a char! So when we go above 127 we turn negative!
331 #define FILENO(a) ((unsigned)fileno(a))
334 * post-make command processing. The node postCommands is really just the
335 * .END target but we keep it around to avoid having to search for it
338 static GNode *postCommands;
341 * The number of commands actually printed for a target. Should this
342 * number be 0, no shell will be executed.
344 static int numCommands;
347 * Return values from JobStart.
349 #define JOB_RUNNING 0 /* Job is running */
350 #define JOB_ERROR 1 /* Error in starting the job */
351 #define JOB_FINISHED 2 /* The job is already finished */
352 #define JOB_STOPPED 3 /* The job is stopped */
355 * Descriptions for various shells.
357 static const struct CShell shells[] = {
359 * CSH description. The csh can do echo control by playing
360 * with the setting of the 'echo' shell variable. Sadly,
361 * however, it is unable to do error control nicely.
365 TRUE, "unset verbose", "set verbose", "unset verbose",
366 FALSE, "echo \"%s\"\n", "csh -c \"%s || exit 0\"",
370 * SH description. Echo control is also possible and, under
371 * sun UNIX anyway, one can even control error checking.
375 TRUE, "set -", "set -v", "set -",
376 TRUE, "set -e", "set +e",
377 #ifdef OLDBOURNESHELL
378 FALSE, "echo \"%s\"\n", "sh -c '%s || exit 0'\n",
383 * KSH description. The Korn shell has a superset of
384 * the Bourne shell's functionality.
388 TRUE, "set -", "set -v", "set -",
389 TRUE, "set -e", "set +e",
395 * This is the shell to which we pass all commands in the Makefile.
396 * It is set by the Job_ParseShell function.
398 static struct Shell *commandShell = NULL;
399 static char *shellPath = NULL; /* full pathname of executable image */
400 static char *shellName = NULL; /* last component of shell */
402 int maxJobs; /* The most children we can run at once */
403 static int nJobs; /* The number of children currently running */
405 /* The structures that describe them */
406 static struct JobList jobs = TAILQ_HEAD_INITIALIZER(jobs);
408 static Boolean jobFull; /* Flag to tell when the job table is full. It
409 * is set TRUE when (1) the total number of
410 * running jobs equals the maximum allowed */
412 static int kqfd; /* File descriptor obtained by kqueue() */
414 static fd_set outputs; /* Set of descriptors of pipes connected to
415 * the output channels of children */
418 static GNode *lastNode; /* The node for which output was most recently
420 static const char *targFmt; /* Format string to use to head output from a
421 * job when it's not the most-recent job heard
424 #define TARG_FMT "--- %s ---\n" /* Default format */
425 #define MESSAGE(fp, gn) \
426 fprintf(fp, targFmt, gn->name);
429 * When JobStart attempts to run a job but isn't allowed to
430 * or when Job_CatchChildren detects a job that has
431 * been stopped somehow, the job is placed on the stoppedJobs queue to be run
432 * when the next job finishes.
434 * Lst of Job structures describing jobs that were stopped due to
435 * concurrency limits or externally
437 static struct JobList stoppedJobs = TAILQ_HEAD_INITIALIZER(stoppedJobs);
439 static int fifoFd; /* Fd of our job fifo */
440 static char fifoName[] = "/tmp/make_fifo_XXXXXXXXX";
441 static int fifoMaster;
443 static sig_atomic_t interrupted;
446 #if defined(USE_PGRP) && defined(SYSV)
447 # define KILL(pid, sig) killpg(-(pid), (sig))
449 # if defined(USE_PGRP)
450 # define KILL(pid, sig) killpg((pid), (sig))
452 # define KILL(pid, sig) kill((pid), (sig))
457 * Grmpf... There is no way to set bits of the wait structure
458 * anymore with the stupid W*() macros. I liked the union wait
459 * stuff much more. So, we devise our own macros... This is
460 * really ugly, use dramamine sparingly. You have been warned.
462 #define W_SETMASKED(st, val, fun) \
465 int mask = fun(sh); \
467 for (sh = 0; ((mask >> sh) & 1) == 0; sh++) \
469 *(st) = (*(st) & ~mask) | ((val) << sh); \
472 #define W_SETTERMSIG(st, val) W_SETMASKED(st, val, WTERMSIG)
473 #define W_SETEXITSTATUS(st, val) W_SETMASKED(st, val, WEXITSTATUS)
476 * Information used to create a new process.
478 typedef struct ProcStuff {
479 int in; /* stdin for new process */
480 int out; /* stdout for new process */
481 int err; /* stderr for new process */
483 int merge_errors; /* true if stderr is redirected to stdin */
484 int pgroup; /* true if new process a process leader */
485 int searchpath; /* true if binary should be found via $PATH */
492 static void JobRestart(Job *);
493 static int JobStart(GNode *, int, Job *);
494 static void JobDoOutput(Job *, Boolean);
495 static struct Shell *JobMatchShell(const char *);
496 static void JobInterrupt(int, int);
497 static void JobRestartJobs(void);
498 static void ProcExec(ProcStuff *) __dead2;
501 * The following array is used to make a fast determination of which
502 * characters are interpreted specially by the shell. If a command
503 * contains any of these characters, it is executed by the shell, not
506 static char meta[256];
508 static GNode *curTarg = NULL;
509 static GNode *ENDNode;
512 * Replace the current process.
515 ProcExec(ProcStuff *ps)
517 if (ps->in != STDIN_FILENO) {
519 * Redirect the child's stdin to the input fd
520 * and reset it to the beginning (again).
522 if (dup2(ps->in, STDIN_FILENO) == -1)
523 Punt("Cannot dup2: %s", strerror(errno));
524 lseek(STDIN_FILENO, (off_t)0, SEEK_SET);
527 if (ps->out != STDOUT_FILENO) {
529 * Redirect the child's stdout to the output fd.
531 if (dup2(ps->out, STDOUT_FILENO) == -1)
532 Punt("Cannot dup2: %s", strerror(errno));
536 if (ps->err != STDERR_FILENO) {
538 * Redirect the child's stderr to the err fd.
540 if (dup2(ps->err, STDERR_FILENO) == -1)
541 Punt("Cannot dup2: %s", strerror(errno));
545 if (ps->merge_errors) {
547 * Send stderr to parent process too.
549 if (dup2(STDOUT_FILENO, STDERR_FILENO) == -1)
550 Punt("Cannot dup2: %s", strerror(errno));
554 * The file descriptors for stdin, stdout, or stderr might
555 * have been marked close-on-exec. Clear the flag on all
558 fcntl(STDIN_FILENO, F_SETFD,
559 fcntl(STDIN_FILENO, F_GETFD) & (~FD_CLOEXEC));
560 fcntl(STDOUT_FILENO, F_SETFD,
561 fcntl(STDOUT_FILENO, F_GETFD) & (~FD_CLOEXEC));
562 fcntl(STDERR_FILENO, F_SETFD,
563 fcntl(STDERR_FILENO, F_GETFD) & (~FD_CLOEXEC));
568 * Become a process group leader, so we can kill it and all
569 * its descendants in one fell swoop, by killing its process
570 * family, but not commit suicide.
575 setpgid(0, getpid());
577 #endif /* USE_PGRP */
580 if (ps->searchpath) {
581 execvp(ps->argv[0], ps->argv);
583 write(STDERR_FILENO, ps->argv[0], strlen(ps->argv[0]));
584 write(STDERR_FILENO, ":", 1);
585 write(STDERR_FILENO, strerror(errno), strlen(strerror(errno)));
586 write(STDERR_FILENO, "\n", 1);
588 execv(shellPath, ps->argv);
591 "Could not execute shell\n",
592 sizeof("Could not execute shell"));
596 * Since we are the child process, exit without flushing buffers.
602 * Wait for child process to terminate.
605 ProcWait(ProcStuff *ps)
611 * Wait for the process to exit.
615 if (pid == -1 && errno != EINTR) {
616 Fatal("error in wait: %d", pid);
619 if (pid == ps->child_pid) {
632 * Got a signal. Set global variables and hope that someone will
636 JobCatchSig(int signo)
644 * Pass a signal on to all local jobs if
645 * USE_PGRP is defined, then die ourselves.
648 * We die by the same signal.
651 JobPassSig(int signo)
654 sigset_t nmask, omask;
655 struct sigaction act;
658 sigaddset(&nmask, signo);
659 sigprocmask(SIG_SETMASK, &nmask, &omask);
661 DEBUGF(JOB, ("JobPassSig(%d) called.\n", signo));
662 TAILQ_FOREACH(job, &jobs, link) {
663 DEBUGF(JOB, ("JobPassSig passing signal %d to child %jd.\n",
664 signo, (intmax_t)job->pid));
665 KILL(job->pid, signo);
669 * Deal with proper cleanup based on the signal received. We only run
670 * the .INTERRUPT target if the signal was in fact an interrupt.
671 * The other three termination signals are more of a "get out *now*"
674 if (signo == SIGINT) {
675 JobInterrupt(TRUE, signo);
676 } else if (signo == SIGHUP || signo == SIGTERM || signo == SIGQUIT) {
677 JobInterrupt(FALSE, signo);
681 * Leave gracefully if SIGQUIT, rather than core dumping.
683 if (signo == SIGQUIT) {
688 * Send ourselves the signal now we've given the message to everyone
689 * else. Note we block everything else possible while we're getting
690 * the signal. This ensures that all our jobs get continued when we
691 * wake up before we take any other signal.
692 * XXX this comment seems wrong.
694 act.sa_handler = SIG_DFL;
695 sigemptyset(&act.sa_mask);
697 sigaction(signo, &act, NULL);
699 DEBUGF(JOB, ("JobPassSig passing signal to self, mask = %x.\n",
700 ~0 & ~(1 << (signo - 1))));
701 signal(signo, SIG_DFL);
703 KILL(getpid(), signo);
706 TAILQ_FOREACH(job, &jobs, link) {
707 DEBUGF(JOB, ("JobPassSig passing signal %d to child %jd.\n",
708 signo, (intmax_t)job->pid));
709 KILL(job->pid, signo);
712 sigprocmask(SIG_SETMASK, &omask, NULL);
713 sigprocmask(SIG_SETMASK, &omask, NULL);
714 act.sa_handler = JobPassSig;
715 sigaction(signo, &act, NULL);
720 * Put out another command for the given job. If the command starts
721 * with an @ or a - we process it specially. In the former case,
722 * so long as the -s and -n flags weren't given to make, we stick
723 * a shell-specific echoOff command in the script. In the latter,
724 * we ignore errors for the entire job, unless the shell has error
726 * If the command is just "..." we take all future commands for this
727 * job to be commands to be executed once the entire graph has been
728 * made and return non-zero to signal that the end of the commands
729 * was reached. These commands are later attached to the postCommands
730 * node and executed by Job_Finish when all things are done.
731 * This function is called from JobStart via LST_FOREACH.
734 * Always 0, unless the command was "..."
737 * If the command begins with a '-' and the shell has no error control,
738 * the JOB_IGNERR flag is set in the job descriptor.
739 * If the command is "..." and we're not ignoring such things,
740 * tailCmds is set to the successor node of the cmd.
741 * numCommands is incremented if the command is actually printed.
744 JobPrintCommand(char *cmd, Job *job)
746 Boolean noSpecials; /* true if we shouldn't worry about
747 * inserting special commands into
748 * the input stream. */
749 Boolean shutUp = FALSE; /* true if we put a no echo command
750 * into the command file */
751 Boolean errOff = FALSE; /* true if we turned error checking
752 * off before printing the command
753 * and need to turn it back on */
754 const char *cmdTemplate;/* Template to use when printing the command */
755 char *cmdStart; /* Start of expanded command */
756 LstNode *cmdNode; /* Node for replacing the command */
758 noSpecials = (noExecute && !(job->node->type & OP_MAKE));
760 if (strcmp(cmd, "...") == 0) {
761 job->node->type |= OP_SAVE_CMDS;
762 if ((job->flags & JOB_IGNDOTS) == 0) {
764 Lst_Succ(Lst_Member(&job->node->commands, cmd));
770 #define DBPRINTF(fmt, arg) \
771 DEBUGF(JOB, (fmt, arg)); \
772 fprintf(job->cmdFILE, fmt, arg); \
773 fflush(job->cmdFILE);
778 * For debugging, we replace each command with the result of expanding
779 * the variables in the command.
781 cmdNode = Lst_Member(&job->node->commands, cmd);
783 cmd = Buf_Peel(Var_Subst(cmd, job->node, FALSE));
786 Lst_Replace(cmdNode, cmdStart);
788 cmdTemplate = "%s\n";
791 * Check for leading @', -' or +'s to control echoing, error checking,
792 * and execution on -n.
794 while (*cmd == '@' || *cmd == '-' || *cmd == '+') {
798 shutUp = DEBUG(LOUD) ? FALSE : TRUE;
808 * We're not actually exececuting anything...
809 * but this one needs to be - use compat mode
812 Compat_RunCommand(cmd, job->node);
820 while (isspace((unsigned char)*cmd))
824 if (!(job->flags & JOB_SILENT) && !noSpecials &&
825 commandShell->hasEchoCtl) {
826 DBPRINTF("%s\n", commandShell->echoOff);
833 if (!(job->flags & JOB_IGNERR) && !noSpecials) {
834 if (commandShell->hasErrCtl) {
836 * We don't want the error-control commands
837 * showing up either, so we turn off echoing
838 * while executing them. We could put another
839 * field in the shell structure to tell
840 * JobDoOutput to look for this string too,
841 * but why make it any more complex than
844 if (!(job->flags & JOB_SILENT) && !shutUp &&
845 commandShell->hasEchoCtl) {
846 DBPRINTF("%s\n", commandShell->echoOff);
847 DBPRINTF("%s\n", commandShell->ignErr);
848 DBPRINTF("%s\n", commandShell->echoOn);
850 DBPRINTF("%s\n", commandShell->ignErr);
852 } else if (commandShell->ignErr &&
853 *commandShell->ignErr != '\0') {
855 * The shell has no error control, so we need to
856 * be weird to get it to ignore any errors from
857 * the command. If echoing is turned on, we turn
858 * it off and use the errCheck template to echo
859 * the command. Leave echoing off so the user
860 * doesn't see the weirdness we go through to
861 * ignore errors. Set cmdTemplate to use the
862 * weirdness instead of the simple "%s\n"
865 if (!(job->flags & JOB_SILENT) && !shutUp &&
866 commandShell->hasEchoCtl) {
867 DBPRINTF("%s\n", commandShell->echoOff);
868 DBPRINTF(commandShell->errCheck, cmd);
871 cmdTemplate = commandShell->ignErr;
873 * The error ignoration (hee hee) is already
874 * taken care of by the ignErr template, so
875 * pretend error checking is still on.
886 DBPRINTF(cmdTemplate, cmd);
890 * If echoing is already off, there's no point in issuing the
891 * echoOff command. Otherwise we issue it and pretend it was on
892 * for the whole command...
894 if (!shutUp && !(job->flags & JOB_SILENT) &&
895 commandShell->hasEchoCtl) {
896 DBPRINTF("%s\n", commandShell->echoOff);
899 DBPRINTF("%s\n", commandShell->errCheck);
902 DBPRINTF("%s\n", commandShell->echoOn);
909 * Called to close both input and output pipes when a job is finished.
912 * The file descriptors associated with the job are closed.
919 #if !defined(USE_KQUEUE)
920 FD_CLR(job->inPipe, &outputs);
922 if (job->outPipe != job->inPipe) {
925 JobDoOutput(job, TRUE);
929 JobDoOutput(job, TRUE);
935 * Do final processing for the given job including updating
936 * parents and starting new jobs as available/necessary. Note
937 * that we pay no attention to the JOB_IGNERR flag here.
938 * This is because when we're called because of a noexecute flag
939 * or something, jstat.w_status is 0 and when called from
940 * Job_CatchChildren, the status is zeroed if it s/b ignored.
943 * Some nodes may be put on the toBeMade queue.
944 * Final commands for the job are placed on postCommands.
946 * If we got an error and are aborting (aborting == ABORT_ERROR) and
947 * the job list is now empty, we are done for the day.
948 * If we recognized an error (errors !=0), we set the aborting flag
949 * to ABORT_ERROR so no more jobs will be started.
952 JobFinish(Job *job, int *status)
957 if (WIFEXITED(*status)) {
958 int job_status = WEXITSTATUS(*status);
962 * Deal with ignored errors in -B mode. We need to
963 * print a message telling of the ignored error as
964 * well as setting status.w_status to 0 so the next
965 * command gets run. To do this, we set done to be
966 * TRUE if in -B mode and the job exited non-zero.
968 if (job_status == 0) {
971 if (job->flags & JOB_IGNERR) {
975 * If it exited non-zero and either we're
976 * doing things our way or we're not ignoring
977 * errors, the job is finished. Similarly, if
978 * the shell died because of a signal the job
979 * is also finished. In these cases, finish
980 * out the job's output before printing the
984 if (job->cmdFILE != NULL &&
985 job->cmdFILE != stdout) {
986 fclose(job->cmdFILE);
991 } else if (WIFSIGNALED(*status)) {
992 if (WTERMSIG(*status) == SIGCONT) {
994 * No need to close things down or anything.
999 * If it exited non-zero and either we're
1000 * doing things our way or we're not ignoring
1001 * errors, the job is finished. Similarly, if
1002 * the shell died because of a signal the job
1003 * is also finished. In these cases, finish
1004 * out the job's output before printing the
1008 if (job->cmdFILE != NULL &&
1009 job->cmdFILE != stdout) {
1010 fclose(job->cmdFILE);
1016 * No need to close things down or anything.
1021 if (done || WIFSTOPPED(*status) ||
1022 (WIFSIGNALED(*status) && WTERMSIG(*status) == SIGCONT) ||
1026 if (compatMake && !usePipes && (job->flags & JOB_IGNERR)) {
1028 * If output is going to a file and this job is ignoring
1029 * errors, arrange to have the exit status sent to the
1030 * output file as well.
1032 out = fdopen(job->outFd, "w");
1034 Punt("Cannot fdopen");
1039 if (WIFEXITED(*status)) {
1040 DEBUGF(JOB, ("Process %jd exited.\n",
1041 (intmax_t)job->pid));
1042 if (WEXITSTATUS(*status) != 0) {
1043 if (usePipes && job->node != lastNode) {
1044 MESSAGE(out, job->node);
1045 lastNode = job->node;
1047 fprintf(out, "*** Error code %d%s\n",
1048 WEXITSTATUS(*status),
1049 (job->flags & JOB_IGNERR) ?
1052 if (job->flags & JOB_IGNERR) {
1055 } else if (DEBUG(JOB)) {
1056 if (usePipes && job->node != lastNode) {
1057 MESSAGE(out, job->node);
1058 lastNode = job->node;
1060 fprintf(out, "*** Completed successfully\n");
1063 } else if (WIFSTOPPED(*status)) {
1064 DEBUGF(JOB, ("Process %jd stopped.\n",
1065 (intmax_t)job->pid));
1066 if (usePipes && job->node != lastNode) {
1067 MESSAGE(out, job->node);
1068 lastNode = job->node;
1070 fprintf(out, "*** Stopped -- signal %d\n",
1072 job->flags |= JOB_RESUME;
1073 TAILQ_INSERT_TAIL(&stoppedJobs, job, link);
1077 } else if (WTERMSIG(*status) == SIGCONT) {
1079 * If the beastie has continued, shift the Job from
1080 * the stopped list to the running one (or re-stop it
1081 * if concurrency is exceeded) and go and get another
1084 if (job->flags & (JOB_RESUME | JOB_RESTART)) {
1085 if (usePipes && job->node != lastNode) {
1086 MESSAGE(out, job->node);
1087 lastNode = job->node;
1089 fprintf(out, "*** Continued\n");
1091 if (!(job->flags & JOB_CONTINUING)) {
1092 DEBUGF(JOB, ("Warning: process %jd was not "
1093 "continuing.\n", (intmax_t)job->pid));
1096 * We don't really want to restart a job from
1097 * scratch just because it continued, especially
1098 * not without killing the continuing process!
1099 * That's why this is ifdef'ed out.
1105 job->flags &= ~JOB_CONTINUING;
1106 TAILQ_INSERT_TAIL(&jobs, job, link);
1108 DEBUGF(JOB, ("Process %jd is continuing locally.\n",
1109 (intmax_t)job->pid));
1110 if (nJobs == maxJobs) {
1112 DEBUGF(JOB, ("Job queue is full.\n"));
1118 if (usePipes && job->node != lastNode) {
1119 MESSAGE(out, job->node);
1120 lastNode = job->node;
1122 fprintf(out, "*** Signal %d\n", WTERMSIG(*status));
1129 * Now handle the -B-mode stuff. If the beast still isn't finished,
1130 * try and restart the job on the next command. If JobStart says it's
1131 * ok, it's ok. If there's an error, this puppy is done.
1133 if (compatMake && WIFEXITED(*status) &&
1134 Lst_Succ(job->node->compat_command) != NULL) {
1135 switch (JobStart(job->node, job->flags & JOB_IGNDOTS, job)) {
1141 W_SETEXITSTATUS(status, 1);
1145 * If we got back a JOB_FINISHED code, JobStart has
1146 * already called Make_Update and freed the job
1147 * descriptor. We set done to false here to avoid fake
1148 * cycles and double frees. JobStart needs to do the
1149 * update so we can proceed up the graph when given
1161 if (done && aborting != ABORT_ERROR &&
1162 aborting != ABORT_INTERRUPT && *status == 0) {
1164 * As long as we aren't aborting and the job didn't return a
1165 * non-zero status that we shouldn't ignore, we call
1166 * Make_Update to update the parents. In addition, any saved
1167 * commands for the node are placed on the .END target.
1169 for (ln = job->tailCmds; ln != NULL; ln = LST_NEXT(ln)) {
1170 Lst_AtEnd(&postCommands->commands,
1172 Var_Subst(Lst_Datum(ln), job->node, FALSE)));
1175 job->node->made = MADE;
1176 Make_Update(job->node);
1179 } else if (*status != 0) {
1187 * Set aborting if any error.
1189 if (errors && !keepgoing && aborting != ABORT_INTERRUPT) {
1191 * If we found any errors in this batch of children and the -k
1192 * flag wasn't given, we set the aborting flag so no more jobs
1195 aborting = ABORT_ERROR;
1198 if (aborting == ABORT_ERROR && Job_Empty()) {
1200 * If we are aborting and the job table is now empty, we finish.
1208 * Touch the given target. Called by JobStart when the -t flag was
1209 * given. Prints messages unless told to be silent.
1212 * The data modification of the file is changed. In addition, if the
1213 * file did not exist, it is created.
1216 Job_Touch(GNode *gn, Boolean silent)
1218 int streamID; /* ID of stream opened to do the touch */
1219 struct utimbuf times; /* Times for utime() call */
1221 if (gn->type & (OP_JOIN | OP_USE | OP_EXEC | OP_OPTIONAL)) {
1223 * .JOIN, .USE, .ZEROTIME and .OPTIONAL targets are "virtual"
1224 * targets and, as such, shouldn't really be created.
1230 fprintf(stdout, "touch %s\n", gn->name);
1238 if (gn->type & OP_ARCHV) {
1240 } else if (gn->type & OP_LIB) {
1243 char *file = gn->path ? gn->path : gn->name;
1245 times.actime = times.modtime = now;
1246 if (utime(file, ×) < 0) {
1247 streamID = open(file, O_RDWR | O_CREAT, 0666);
1249 if (streamID >= 0) {
1253 * Read and write a byte to the file to change
1254 * the modification time, then close the file.
1256 if (read(streamID, &c, 1) == 1) {
1257 lseek(streamID, (off_t)0, SEEK_SET);
1258 write(streamID, &c, 1);
1263 fprintf(stdout, "*** couldn't touch %s: %s",
1264 file, strerror(errno));
1273 * Make sure the given node has all the commands it needs.
1276 * TRUE if the commands list is/was ok.
1279 * The node will have commands from the .DEFAULT rule added to it
1283 Job_CheckCommands(GNode *gn, void (*abortProc)(const char *, ...))
1286 if (OP_NOP(gn->type) && Lst_IsEmpty(&gn->commands) &&
1287 (gn->type & OP_LIB) == 0) {
1289 * No commands. Look for .DEFAULT rule from which we might infer
1292 if (DEFAULT != NULL && !Lst_IsEmpty(&DEFAULT->commands)) {
1295 * Make only looks for a .DEFAULT if the node was
1296 * never the target of an operator, so that's what we
1297 * do too. If a .DEFAULT was given, we substitute its
1298 * commands for gn's commands and set the IMPSRC
1299 * variable to be the target's name The DEFAULT node
1300 * acts like a transformation rule, in that gn also
1301 * inherits any attributes or sources attached to
1304 Make_HandleUse(DEFAULT, gn);
1305 Var_Set(IMPSRC, Var_Value(TARGET, gn, &p1), gn);
1308 } else if (Dir_MTime(gn) == 0) {
1310 * The node wasn't the target of an operator we have
1311 * no .DEFAULT rule to go on and the target doesn't
1312 * already exist. There's nothing more we can do for
1313 * this branch. If the -k flag wasn't given, we stop
1314 * in our tracks, otherwise we just don't update
1315 * this node's parents so they never get examined.
1317 static const char msg[] =
1318 "make: don't know how to make";
1320 if (gn->type & OP_OPTIONAL) {
1321 fprintf(stdout, "%s %s(ignored)\n",
1324 } else if (keepgoing) {
1325 fprintf(stdout, "%s %s(continuing)\n",
1331 if (strcmp(gn->name,"love") == 0)
1332 (*abortProc)("Not war.");
1335 (*abortProc)("%s %s. Stop",
1346 * Execute the shell for the given job. Called from JobStart and
1350 * A shell is executed, outputs is altered and the Job structure added
1354 JobExec(Job *job, char **argv)
1361 DEBUGF(JOB, ("Running %s\n", job->node->name));
1362 DEBUGF(JOB, ("\tCommand: "));
1363 for (i = 0; argv[i] != NULL; i++) {
1364 DEBUGF(JOB, ("%s ", argv[i]));
1366 DEBUGF(JOB, ("\n"));
1370 * Some jobs produce no output and it's disconcerting to have
1371 * no feedback of their running (since they produce no output, the
1372 * banner with their name in it never appears). This is an attempt to
1373 * provide that feedback, even if nothing follows it.
1375 if (lastNode != job->node && (job->flags & JOB_FIRST) &&
1376 !(job->flags & JOB_SILENT)) {
1377 MESSAGE(stdout, job->node);
1378 lastNode = job->node;
1381 ps.in = FILENO(job->cmdFILE);
1384 * Set up the child's output to be routed through the
1385 * pipe we've created for it.
1387 ps.out = job->outPipe;
1390 * We're capturing output in a file, so we duplicate
1391 * the descriptor to the temporary file into the
1394 ps.out = job->outFd;
1396 ps.err = STDERR_FILENO;
1398 ps.merge_errors = 1;
1405 * Fork. Warning since we are doing vfork() instead of fork(),
1406 * do not allocate memory in the child process!
1408 if ((ps.child_pid = vfork()) == -1) {
1409 Punt("Cannot fork");
1411 } else if (ps.child_pid == 0) {
1425 job->pid = ps.child_pid;
1427 if (usePipes && (job->flags & JOB_FIRST)) {
1429 * The first time a job is run for a node, we set the
1430 * current position in the buffer to the beginning and
1431 * mark another stream to watch in the outputs mask.
1434 struct kevent kev[2];
1438 #if defined(USE_KQUEUE)
1439 EV_SET(&kev[0], job->inPipe, EVFILT_READ, EV_ADD, 0, 0, job);
1440 EV_SET(&kev[1], job->pid, EVFILT_PROC,
1441 EV_ADD | EV_ONESHOT, NOTE_EXIT, 0, NULL);
1442 if (kevent(kqfd, kev, 2, NULL, 0, NULL) != 0) {
1444 * kevent() will fail if the job is already
1447 if (errno != EINTR && errno != EBADF && errno != ESRCH)
1448 Punt("kevent: %s", strerror(errno));
1451 FD_SET(job->inPipe, &outputs);
1452 #endif /* USE_KQUEUE */
1455 if (job->cmdFILE != NULL && job->cmdFILE != stdout) {
1456 fclose(job->cmdFILE);
1457 job->cmdFILE = NULL;
1461 * Now the job is actually running, add it to the table.
1464 TAILQ_INSERT_TAIL(&jobs, job, link);
1465 if (nJobs == maxJobs) {
1473 * Create the argv needed to execute the shell for a given job.
1476 JobMakeArgv(Job *job, char **argv)
1479 static char args[10]; /* For merged arguments */
1481 argv[0] = shellName;
1484 if ((commandShell->exit && *commandShell->exit != '-') ||
1485 (commandShell->echo && *commandShell->echo != '-')) {
1487 * At least one of the flags doesn't have a minus before it, so
1488 * merge them together. Have to do this because the *(&(@*#*&#$#
1489 * Bourne shell thinks its second argument is a file to source.
1490 * Grrrr. Note the ten-character limitation on the combined
1493 sprintf(args, "-%s%s", (job->flags & JOB_IGNERR) ? "" :
1494 commandShell->exit ? commandShell->exit : "",
1495 (job->flags & JOB_SILENT) ? "" :
1496 commandShell->echo ? commandShell->echo : "");
1503 if (!(job->flags & JOB_IGNERR) && commandShell->exit) {
1504 argv[argc] = commandShell->exit;
1507 if (!(job->flags & JOB_SILENT) && commandShell->echo) {
1508 argv[argc] = commandShell->echo;
1517 * Restart a job that stopped for some reason. The job must be neither
1518 * on the jobs nor on the stoppedJobs list.
1521 * jobFull will be set if the job couldn't be run.
1524 JobRestart(Job *job)
1527 if (job->flags & JOB_RESTART) {
1529 * Set up the control arguments to the shell. This is based on
1530 * the flags set earlier for this job. If the JOB_IGNERR flag
1531 * is clear, the 'exit' flag of the commandShell is used to
1532 * cause it to exit upon receiving an error. If the JOB_SILENT
1533 * flag is clear, the 'echo' flag of the commandShell is used
1534 * to get it to start echoing as soon as it starts
1535 * processing commands.
1539 JobMakeArgv(job, argv);
1541 DEBUGF(JOB, ("Restarting %s...", job->node->name));
1542 if (nJobs >= maxJobs && !(job->flags & JOB_SPECIAL)) {
1544 * Not allowed to run -- put it back on the hold
1545 * queue and mark the table full
1547 DEBUGF(JOB, ("holding\n"));
1548 TAILQ_INSERT_HEAD(&stoppedJobs, job, link);
1550 DEBUGF(JOB, ("Job queue is full.\n"));
1554 * Job may be run locally.
1556 DEBUGF(JOB, ("running locally\n"));
1562 * The job has stopped and needs to be restarted.
1563 * Why it stopped, we don't know...
1565 DEBUGF(JOB, ("Resuming %s...", job->node->name));
1566 if ((nJobs < maxJobs || ((job->flags & JOB_SPECIAL) &&
1567 maxJobs == 0)) && nJobs != maxJobs) {
1569 * If we haven't reached the concurrency limit already
1570 * (or the job must be run and maxJobs is 0), it's ok
1576 error = (KILL(job->pid, SIGCONT) != 0);
1580 * Make sure the user knows we've continued
1581 * the beast and actually put the thing in the
1584 job->flags |= JOB_CONTINUING;
1586 W_SETTERMSIG(&status, SIGCONT);
1587 JobFinish(job, &status);
1589 job->flags &= ~(JOB_RESUME|JOB_CONTINUING);
1590 DEBUGF(JOB, ("done\n"));
1592 Error("couldn't resume %s: %s",
1593 job->node->name, strerror(errno));
1595 W_SETEXITSTATUS(&status, 1);
1596 JobFinish(job, &status);
1600 * Job cannot be restarted. Mark the table as full and
1601 * place the job back on the list of stopped jobs.
1603 DEBUGF(JOB, ("table full\n"));
1604 TAILQ_INSERT_HEAD(&stoppedJobs, job, link);
1606 DEBUGF(JOB, ("Job queue is full.\n"));
1613 * Start a target-creation process going for the target described
1614 * by the graph node gn.
1617 * JOB_ERROR if there was an error in the commands, JOB_FINISHED
1618 * if there isn't actually anything left to do for the job and
1619 * JOB_RUNNING if the job has been started.
1622 * A new Job node is created and added to the list of running
1623 * jobs. PMake is forked and a child shell created.
1626 JobStart(GNode *gn, int flags, Job *previous)
1628 Job *job; /* new job descriptor */
1629 char *argv[4]; /* Argument vector to shell */
1630 Boolean cmdsOK; /* true if the nodes commands were all right */
1631 Boolean noExec; /* Set true if we decide not to run the job */
1632 int tfd; /* File descriptor for temp file */
1634 char tfile[sizeof(TMPPAT)];
1637 JobPassSig(interrupted);
1640 if (previous != NULL) {
1641 previous->flags &= ~(JOB_FIRST | JOB_IGNERR | JOB_SILENT);
1644 job = emalloc(sizeof(Job));
1649 job->tailCmds = NULL;
1652 * Set the initial value of the flags for this job based on the global
1653 * ones and the node's attributes... Any flags supplied by the caller
1654 * are also added to the field.
1657 if (Targ_Ignore(gn)) {
1658 job->flags |= JOB_IGNERR;
1660 if (Targ_Silent(gn)) {
1661 job->flags |= JOB_SILENT;
1663 job->flags |= flags;
1666 * Check the commands now so any attributes from .DEFAULT have a chance
1667 * to migrate to the node.
1669 if (!compatMake && (job->flags & JOB_FIRST)) {
1670 cmdsOK = Job_CheckCommands(gn, Error);
1676 * If the -n flag wasn't given, we open up OUR (not the child's)
1677 * temporary file to stuff commands in it. The thing is rd/wr so we
1678 * don't need to reopen it to feed it to the shell. If the -n flag
1679 * *was* given, we just set the file to be stdout. Cute, huh?
1681 if ((gn->type & OP_MAKE) || (!noExecute && !touchFlag)) {
1683 * We're serious here, but if the commands were bogus, we're
1690 strcpy(tfile, TMPPAT);
1691 if ((tfd = mkstemp(tfile)) == -1)
1692 Punt("Cannot create temp file: %s", strerror(errno));
1693 job->cmdFILE = fdopen(tfd, "w+");
1695 if (job->cmdFILE == NULL) {
1697 Punt("Could not open %s", tfile);
1699 fcntl(FILENO(job->cmdFILE), F_SETFD, 1);
1701 * Send the commands to the command file, flush all its
1702 * buffers then rewind and remove the thing.
1707 * Used to be backwards; replace when start doing multiple
1708 * commands per shell.
1712 * Be compatible: If this is the first time for this
1713 * node, verify its commands are ok and open the
1714 * commands list for sequential access by later
1715 * invocations of JobStart. Once that is done, we take
1716 * the next command off the list and print it to the
1717 * command file. If the command was an ellipsis, note
1718 * that there's nothing more to execute.
1720 if (job->flags & JOB_FIRST)
1721 gn->compat_command = Lst_First(&gn->commands);
1723 gn->compat_command =
1724 Lst_Succ(gn->compat_command);
1726 if (gn->compat_command == NULL ||
1727 JobPrintCommand(Lst_Datum(gn->compat_command), job))
1730 if (noExec && !(job->flags & JOB_FIRST)) {
1732 * If we're not going to execute anything, the
1733 * job is done and we need to close down the
1734 * various file descriptors we've opened for
1735 * output, then call JobDoOutput to catch the
1736 * final characters or send the file to the
1737 * screen... Note that the i/o streams are only
1738 * open if this isn't the first job. Note also
1739 * that this could not be done in
1740 * Job_CatchChildren b/c it wasn't clear if
1741 * there were more commands to execute or not...
1747 * We can do all the commands at once. hooray for sanity
1750 LST_FOREACH(ln, &gn->commands) {
1751 if (JobPrintCommand(Lst_Datum(ln), job))
1756 * If we didn't print out any commands to the shell
1757 * script, there's not much point in executing the
1760 if (numCommands == 0) {
1765 } else if (noExecute) {
1767 * Not executing anything -- just print all the commands to
1768 * stdout in one fell swoop. This will still set up
1769 * job->tailCmds correctly.
1771 if (lastNode != gn) {
1772 MESSAGE(stdout, gn);
1775 job->cmdFILE = stdout;
1778 * Only print the commands if they're ok, but don't die if
1779 * they're not -- just let the user know they're bad and keep
1780 * going. It doesn't do any harm in this case and may do
1784 LST_FOREACH(ln, &gn->commands) {
1785 if (JobPrintCommand(Lst_Datum(ln), job))
1790 * Don't execute the shell, thank you.
1796 * Just touch the target and note that no shell should be
1797 * executed. Set cmdFILE to stdout to make life easier. Check
1798 * the commands, too, but don't die if they're no good -- it
1799 * does no harm to keep working up the graph.
1801 job->cmdFILE = stdout;
1802 Job_Touch(gn, job->flags & JOB_SILENT);
1807 * If we're not supposed to execute a shell, don't.
1811 * Unlink and close the command file if we opened one
1813 if (job->cmdFILE != stdout) {
1814 if (job->cmdFILE != NULL)
1815 fclose(job->cmdFILE);
1821 * We only want to work our way up the graph if we aren't here
1822 * because the commands for the job were no good.
1825 if (aborting == 0) {
1826 for (ln = job->tailCmds; ln != NULL;
1827 ln = LST_NEXT(ln)) {
1828 Lst_AtEnd(&postCommands->commands,
1829 Buf_Peel(Var_Subst(Lst_Datum(ln),
1830 job->node, FALSE)));
1832 job->node->made = MADE;
1833 Make_Update(job->node);
1836 return(JOB_FINISHED);
1842 fflush(job->cmdFILE);
1846 * Set up the control arguments to the shell. This is based on the flags
1847 * set earlier for this job.
1849 JobMakeArgv(job, argv);
1852 * If we're using pipes to catch output, create the pipe by which we'll
1853 * get the shell's output. If we're using files, print out that we're
1854 * starting a job and then set up its temporary-file name.
1856 if (!compatMake || (job->flags & JOB_FIRST)) {
1861 Punt("Cannot create pipe: %s", strerror(errno));
1862 job->inPipe = fd[0];
1863 job->outPipe = fd[1];
1864 fcntl(job->inPipe, F_SETFD, 1);
1865 fcntl(job->outPipe, F_SETFD, 1);
1867 fprintf(stdout, "Remaking `%s'\n", gn->name);
1869 strcpy(job->outFile, TMPPAT);
1870 if ((job->outFd = mkstemp(job->outFile)) == -1)
1871 Punt("cannot create temp file: %s",
1873 fcntl(job->outFd, F_SETFD, 1);
1877 if (nJobs >= maxJobs && !(job->flags & JOB_SPECIAL) && maxJobs != 0) {
1879 * We've hit the limit of concurrency, so put the job on hold
1880 * until some other job finishes. Note that the special jobs
1881 * (.BEGIN, .INTERRUPT and .END) may be run even when the
1882 * limit has been reached (e.g. when maxJobs == 0).
1886 DEBUGF(JOB, ("Can only run job locally.\n"));
1887 job->flags |= JOB_RESTART;
1888 TAILQ_INSERT_TAIL(&stoppedJobs, job, link);
1890 if (nJobs >= maxJobs) {
1892 * If we're running this job as a special case
1893 * (see above), at least say the table is full.
1896 DEBUGF(JOB, ("Local job queue is full.\n"));
1900 return (JOB_RUNNING);
1904 JobOutput(Job *job, char *cp, char *endp, int msg)
1908 if (commandShell->noPrint) {
1909 ecp = strstr(cp, commandShell->noPrint);
1910 while (ecp != NULL) {
1913 if (msg && job->node != lastNode) {
1914 MESSAGE(stdout, job->node);
1915 lastNode = job->node;
1918 * The only way there wouldn't be a newline
1919 * after this line is if it were the last in
1920 * the buffer. However, since the non-printable
1921 * comes after it, there must be a newline, so
1922 * we don't print one.
1924 fprintf(stdout, "%s", cp);
1927 cp = ecp + strlen(commandShell->noPrint);
1930 * Still more to print, look again after
1931 * skipping the whitespace following the
1932 * non-printable command....
1935 while (*cp == ' ' || *cp == '\t' ||
1939 ecp = strstr(cp, commandShell->noPrint);
1950 * This function is called at different times depending on
1951 * whether the user has specified that output is to be collected
1952 * via pipes or temporary files. In the former case, we are called
1953 * whenever there is something to read on the pipe. We collect more
1954 * output from the given job and store it in the job's outBuf. If
1955 * this makes up a line, we print it tagged by the job's identifier,
1957 * If output has been collected in a temporary file, we open the
1958 * file and read it line by line, transfering it to our own
1959 * output channel until the file is empty. At which point we
1960 * remove the temporary file.
1961 * In both cases, however, we keep our figurative eye out for the
1962 * 'noPrint' line for the shell from which the output came. If
1963 * we recognize a line, we don't print it. If the command is not
1964 * alone on the line (the character after it is not \0 or \n), we
1965 * do print whatever follows it.
1968 * curPos may be shifted as may the contents of outBuf.
1971 JobDoOutput(Job *job, Boolean finish)
1973 Boolean gotNL = FALSE; /* true if got a newline */
1974 Boolean fbuf; /* true if our buffer filled up */
1975 int nr; /* number of bytes read */
1976 int i; /* auxiliary index into outBuf */
1977 int max; /* limit for i (end of current data) */
1978 int nRead; /* (Temporary) number of bytes read */
1979 FILE *oFILE; /* Stream pointer to shell's output file */
1984 * Read as many bytes as will fit in the buffer.
1990 nRead = read(job->inPipe, &job->outBuf[job->curPos],
1991 JOB_BUFSIZE - job->curPos);
1993 * Check for interrupt here too, because the above read may
1994 * block when the child process is stopped. In this case the
1995 * interrupt will unblock it (we don't use SA_RESTART).
1998 JobPassSig(interrupted);
2001 DEBUGF(JOB, ("JobDoOutput(piperead)"));
2008 * If we hit the end-of-file (the job is dead), we must flush
2009 * its remaining output, so pretend we read a newline if
2010 * there's any output remaining in the buffer.
2011 * Also clear the 'finish' flag so we stop looping.
2013 if (nr == 0 && job->curPos != 0) {
2014 job->outBuf[job->curPos] = '\n';
2017 } else if (nr == 0) {
2022 * Look for the last newline in the bytes we just got. If there
2023 * is one, break out of the loop with 'i' as its index and
2026 max = job->curPos + nr;
2027 for (i = job->curPos + nr - 1; i >= job->curPos; i--) {
2028 if (job->outBuf[i] == '\n') {
2031 } else if (job->outBuf[i] == '\0') {
2035 job->outBuf[i] = ' ';
2041 if (job->curPos == JOB_BUFSIZE) {
2043 * If we've run out of buffer space, we have
2044 * no choice but to print the stuff. sigh.
2050 if (gotNL || fbuf) {
2052 * Need to send the output to the screen. Null terminate
2053 * it first, overwriting the newline character if there
2054 * was one. So long as the line isn't one we should
2055 * filter (according to the shell description), we print
2056 * the line, preceded by a target banner if this target
2057 * isn't the same as the one for which we last printed
2058 * something. The rest of the data in the buffer are
2059 * then shifted down to the start of the buffer and
2060 * curPos is set accordingly.
2062 job->outBuf[i] = '\0';
2063 if (i >= job->curPos) {
2066 cp = JobOutput(job, job->outBuf,
2067 &job->outBuf[i], FALSE);
2070 * There's still more in that buffer. This time,
2071 * though, we know there's no newline at the
2072 * end, so we add one of our own free will.
2075 if (job->node != lastNode) {
2076 MESSAGE(stdout, job->node);
2077 lastNode = job->node;
2079 fprintf(stdout, "%s%s", cp,
2085 /* shift the remaining characters down */
2086 memcpy(job->outBuf, &job->outBuf[i + 1],
2088 job->curPos = max - (i + 1);
2092 * We have written everything out, so we just
2093 * start over from the start of the buffer.
2094 * No copying. No nothing.
2101 * If the finish flag is true, we must loop until we hit
2102 * end-of-file on the pipe. This is guaranteed to happen
2103 * eventually since the other end of the pipe is now
2104 * closed (we closed it explicitly and the child has
2105 * exited). When we do get an EOF, finish will be set
2106 * FALSE and we'll fall through and out.
2113 * We've been called to retrieve the output of the job from the
2114 * temporary file where it's been squirreled away. This consists
2115 * of opening the file, reading the output line by line, being
2116 * sure not to print the noPrint line for the shell we used,
2117 * then close and remove the temporary file. Very simple.
2119 * Change to read in blocks and do FindSubString type things
2120 * as for pipes? That would allow for "@echo -n..."
2122 oFILE = fopen(job->outFile, "r");
2123 if (oFILE != NULL) {
2124 fprintf(stdout, "Results of making %s:\n",
2128 while (fgets(inLine, sizeof(inLine), oFILE) != NULL) {
2129 char *cp, *endp, *oendp;
2132 oendp = endp = inLine + strlen(inLine);
2133 if (endp[-1] == '\n') {
2136 cp = JobOutput(job, inLine, endp, FALSE);
2139 * There's still more in that buffer. This time,
2140 * though, we know there's no newline at the
2141 * end, so we add one of our own free will.
2143 fprintf(stdout, "%s", cp);
2145 if (endp != oendp) {
2146 fprintf(stdout, "\n");
2151 eunlink(job->outFile);
2158 * Handle the exit of a child. Called from Make_Make.
2161 * The job descriptor is removed from the list of children.
2164 * We do waits, blocking or not, according to the wisdom of our
2165 * caller, until there are no more children to report. For each
2166 * job, call JobFinish to finish things off. This will take care of
2167 * putting jobs on the stoppedJobs queue.
2170 Job_CatchChildren(Boolean block)
2172 pid_t pid; /* pid of dead child */
2173 Job *job; /* job descriptor for dead child */
2174 int status; /* Exit/termination status */
2177 * Don't even bother if we know there's no one around.
2184 pid = waitpid((pid_t)-1, &status,
2185 (block ? 0 : WNOHANG) | WUNTRACED);
2189 DEBUGF(JOB, ("Process %jd exited or stopped.\n",
2192 TAILQ_FOREACH(job, &jobs, link) {
2193 if (job->pid == pid)
2198 if (WIFSIGNALED(status) &&
2199 (WTERMSIG(status) == SIGCONT)) {
2200 TAILQ_FOREACH(job, &jobs, link) {
2201 if (job->pid == pid)
2205 Error("Resumed child (%jd) "
2206 "not in table", (intmax_t)pid);
2209 TAILQ_REMOVE(&stoppedJobs, job, link);
2211 Error("Child (%jd) not in table?",
2216 TAILQ_REMOVE(&jobs, job, link);
2218 if (fifoFd >= 0 && maxJobs > 1) {
2219 write(fifoFd, "+", 1);
2221 if (nJobs >= maxJobs)
2226 DEBUGF(JOB, ("Job queue is no longer full.\n"));
2231 JobFinish(job, &status);
2234 JobPassSig(interrupted);
2239 * Catch the output from our children, if we're using
2240 * pipes do so. Otherwise just block time until we get a
2241 * signal(most likely a SIGCHLD) since there's no point in
2242 * just spinning when there's nothing to do and the reaping
2243 * of a child can wait for a while.
2246 * Output is read from pipes if we're piping.
2247 * -----------------------------------------------------------------------
2251 Job_CatchOutput(int flag __unused)
2253 Job_CatchOutput(int flag)
2259 struct kevent kev[KEV_SIZE];
2262 struct timeval timeout;
2271 if ((nfds = kevent(kqfd, NULL, 0, kev, KEV_SIZE, NULL)) == -1) {
2273 Punt("kevent: %s", strerror(errno));
2275 JobPassSig(interrupted);
2277 for (i = 0; i < nfds; i++) {
2278 if (kev[i].flags & EV_ERROR) {
2279 warnc(kev[i].data, "kevent");
2282 switch (kev[i].filter) {
2284 JobDoOutput(kev[i].udata, FALSE);
2288 * Just wake up and let
2289 * Job_CatchChildren() collect the
2298 timeout.tv_sec = SEL_SEC;
2299 timeout.tv_usec = SEL_USEC;
2300 if (flag && jobFull && fifoFd >= 0)
2301 FD_SET(fifoFd, &readfds);
2303 nfds = select(FD_SETSIZE, &readfds, (fd_set *)NULL,
2304 (fd_set *)NULL, &timeout);
2307 JobPassSig(interrupted);
2310 if (fifoFd >= 0 && FD_ISSET(fifoFd, &readfds)) {
2314 job = TAILQ_FIRST(&jobs);
2315 while (nfds != 0 && job != NULL) {
2316 if (FD_ISSET(job->inPipe, &readfds)) {
2317 JobDoOutput(job, FALSE);
2320 job = TAILQ_NEXT(job, link);
2322 #endif /* !USE_KQUEUE */
2328 * Start the creation of a target. Basically a front-end for
2329 * JobStart used by the Make module.
2332 * Another job is started.
2338 JobStart(gn, 0, NULL);
2343 * Make a new copy of the shell structure including a copy of the strings
2344 * in it. This also defaults some fields in case they are NULL.
2347 * The function returns a pointer to the new shell structure.
2349 static struct Shell *
2350 JobCopyShell(const struct Shell *osh)
2354 nsh = emalloc(sizeof(*nsh));
2355 nsh->name = estrdup(osh->name);
2357 if (osh->echoOff != NULL)
2358 nsh->echoOff = estrdup(osh->echoOff);
2360 nsh->echoOff = NULL;
2361 if (osh->echoOn != NULL)
2362 nsh->echoOn = estrdup(osh->echoOn);
2365 nsh->hasEchoCtl = osh->hasEchoCtl;
2367 if (osh->noPrint != NULL)
2368 nsh->noPrint = estrdup(osh->noPrint);
2370 nsh->noPrint = NULL;
2372 nsh->hasErrCtl = osh->hasErrCtl;
2373 if (osh->errCheck == NULL)
2374 nsh->errCheck = estrdup("");
2376 nsh->errCheck = estrdup(osh->errCheck);
2377 if (osh->ignErr == NULL)
2378 nsh->ignErr = estrdup("%s");
2380 nsh->ignErr = estrdup(osh->ignErr);
2382 if (osh->echo == NULL)
2383 nsh->echo = estrdup("");
2385 nsh->echo = estrdup(osh->echo);
2387 if (osh->exit == NULL)
2388 nsh->exit = estrdup("");
2390 nsh->exit = estrdup(osh->exit);
2397 * Free a shell structure and all associated strings.
2400 JobFreeShell(struct Shell *sh)
2420 if (commandShell == NULL)
2421 commandShell = JobMatchShell(shells[DEFSHELL].name);
2423 if (shellPath == NULL) {
2425 * The user didn't specify a shell to use, so we are using the
2426 * default one... Both the absolute path and the last component
2427 * must be set. The last component is taken from the 'name'
2428 * field of the default shell description pointed-to by
2429 * commandShell. All default shells are located in
2432 shellName = commandShell->name;
2433 shellPath = str_concat(PATH_DEFSHELLDIR, shellName,
2440 * Initialize the process module, given a maximum number of jobs.
2443 * lists and counters are initialized
2446 Job_Init(int maxproc)
2448 GNode *begin; /* node for commands to do at the very start */
2450 struct sigaction sa;
2453 env = getenv("MAKE_JOBS_FIFO");
2455 if (env == NULL && maxproc > 1) {
2457 * We did not find the environment variable so we are the
2458 * leader. Create the fifo, open it, write one char per
2459 * allowed job into the pipe.
2462 if (!mkfifo(fifoName, 0600)) {
2463 fifoFd = open(fifoName, O_RDWR | O_NONBLOCK, 0);
2466 fcntl(fifoFd, F_SETFL, O_NONBLOCK);
2468 setenv("MAKE_JOBS_FIFO", env, 1);
2469 while (maxproc-- > 0) {
2470 write(fifoFd, "+", 1);
2472 /* The master make does not get a magic token */
2481 } else if (env != NULL) {
2483 * We had the environment variable so we are a slave.
2484 * Open fifo and give ourselves a magic token which represents
2485 * the token our parent make has grabbed to start his make
2486 * process. Otherwise the sub-makes would gobble up tokens and
2487 * the proper number of tokens to specify to -j would depend
2488 * on the depth of the tree and the order of execution.
2490 fifoFd = open(env, O_RDWR, 0);
2492 fcntl(fifoFd, F_SETFL, O_NONBLOCK);
2509 if ((maxJobs == 1 && fifoFd < 0) || beVerbose == 0) {
2511 * If only one job can run at a time, there's no need for a
2512 * banner, no is there?
2522 * Catch the four signals that POSIX specifies if they aren't ignored.
2523 * JobCatchSignal will just set global variables and hope someone
2524 * else is going to handle the interrupt.
2526 sa.sa_handler = JobCatchSig;
2527 sigemptyset(&sa.sa_mask);
2530 if (signal(SIGINT, SIG_IGN) != SIG_IGN) {
2531 sigaction(SIGINT, &sa, NULL);
2533 if (signal(SIGHUP, SIG_IGN) != SIG_IGN) {
2534 sigaction(SIGHUP, &sa, NULL);
2536 if (signal(SIGQUIT, SIG_IGN) != SIG_IGN) {
2537 sigaction(SIGQUIT, &sa, NULL);
2539 if (signal(SIGTERM, SIG_IGN) != SIG_IGN) {
2540 sigaction(SIGTERM, &sa, NULL);
2543 * There are additional signals that need to be caught and passed if
2544 * either the export system wants to be told directly of signals or if
2545 * we're giving each job its own process group (since then it won't get
2546 * signals from the terminal driver as we own the terminal)
2548 #if defined(USE_PGRP)
2549 if (signal(SIGTSTP, SIG_IGN) != SIG_IGN) {
2550 sigaction(SIGTSTP, &sa, NULL);
2552 if (signal(SIGTTOU, SIG_IGN) != SIG_IGN) {
2553 sigaction(SIGTTOU, &sa, NULL);
2555 if (signal(SIGTTIN, SIG_IGN) != SIG_IGN) {
2556 sigaction(SIGTTIN, &sa, NULL);
2558 if (signal(SIGWINCH, SIG_IGN) != SIG_IGN) {
2559 sigaction(SIGWINCH, &sa, NULL);
2564 if ((kqfd = kqueue()) == -1) {
2565 Punt("kqueue: %s", strerror(errno));
2569 begin = Targ_FindNode(".BEGIN", TARG_NOCREATE);
2571 if (begin != NULL) {
2572 JobStart(begin, JOB_SPECIAL, (Job *)NULL);
2575 Job_CatchChildren(!usePipes);
2578 postCommands = Targ_FindNode(".END", TARG_CREATE);
2583 * See if the job table is full. It is considered full if it is OR
2584 * if we are in the process of aborting OR if we have
2585 * reached/exceeded our local quota. This prevents any more jobs
2589 * TRUE if the job table is full, FALSE otherwise
2599 if (fifoFd >= 0 && jobFull) {
2600 i = read(fifoFd, &c, 1);
2611 * See if the job table is empty. Because the local concurrency may
2612 * be set to 0, it is possible for the job table to become empty,
2613 * while the list of stoppedJobs remains non-empty. In such a case,
2614 * we want to restart as many jobs as we can.
2617 * TRUE if it is. FALSE if it ain't.
2623 if (!TAILQ_EMPTY(&stoppedJobs) && !aborting) {
2625 * The job table is obviously not full if it has no
2626 * jobs in it...Try and restart the stopped jobs.
2641 * Find a matching shell in 'shells' given its final component.
2644 * A pointer to a freshly allocated Shell structure with a copy
2645 * of the static structure or NULL if no shell with the given name
2648 static struct Shell *
2649 JobMatchShell(const char *name)
2651 const struct CShell *sh; /* Pointer into shells table */
2654 for (sh = shells; sh < shells + __arysize(shells); sh++)
2655 if (strcmp(sh->name, name) == 0)
2658 if (sh == shells + __arysize(shells))
2662 nsh = emalloc(sizeof(*nsh));
2664 nsh->name = estrdup(sh->name);
2665 nsh->echoOff = estrdup(sh->echoOff);
2666 nsh->echoOn = estrdup(sh->echoOn);
2667 nsh->hasEchoCtl = sh->hasEchoCtl;
2668 nsh->noPrint = estrdup(sh->noPrint);
2669 nsh->hasErrCtl = sh->hasErrCtl;
2670 nsh->errCheck = estrdup(sh->errCheck);
2671 nsh->ignErr = estrdup(sh->ignErr);
2672 nsh->echo = estrdup(sh->echo);
2673 nsh->exit = estrdup(sh->exit);
2680 * Parse a shell specification and set up commandShell, shellPath
2681 * and shellName appropriately.
2684 * FAILURE if the specification was incorrect.
2687 * commandShell points to a Shell structure (either predefined or
2688 * created from the shell spec), shellPath is the full path of the
2689 * shell described by commandShell, while shellName is just the
2690 * final component of shellPath.
2693 * A shell specification consists of a .SHELL target, with dependency
2694 * operator, followed by a series of blank-separated words. Double
2695 * quotes can be used to use blanks in words. A backslash escapes
2696 * anything (most notably a double-quote and a space) and
2697 * provides the functionality it does in C. Each word consists of
2698 * keyword and value separated by an equal sign. There should be no
2699 * unnecessary spaces in the word. The keywords are as follows:
2700 * name Name of shell.
2701 * path Location of shell. Overrides "name" if given
2702 * quiet Command to turn off echoing.
2703 * echo Command to turn echoing on
2704 * filter Result of turning off echoing that shouldn't be
2706 * echoFlag Flag to turn echoing on at the start
2707 * errFlag Flag to turn error checking on at the start
2708 * hasErrCtl True if shell has error checking control
2709 * check Command to turn on error checking if hasErrCtl
2710 * is TRUE or template of command to echo a command
2711 * for which error checking is off if hasErrCtl is
2713 * ignore Command to turn off error checking if hasErrCtl
2714 * is TRUE or template of command to execute a
2715 * command so as to ignore any errors it returns if
2716 * hasErrCtl is FALSE.
2719 Job_ParseShell(char *line)
2727 Boolean fullSpec = FALSE;
2728 struct Shell newShell;
2731 while (isspace((unsigned char)*line)) {
2734 words = brk_string(line, &wordCount, TRUE);
2736 memset(&newShell, 0, sizeof(newShell));
2740 * Parse the specification by keyword but skip the first word - it
2741 * is not set by brk_string.
2746 for (argc = wordCount, argv = words; argc != 0; argc--, argv++) {
2748 * Split keyword and value
2750 if ((eq = strchr(*argv, '=')) == NULL) {
2751 Parse_Error(PARSE_FATAL, "missing '=' in shell "
2752 "specification keyword '%s'", *argv);
2757 if (strcmp(*argv, "path") == 0) {
2759 } else if (strcmp(*argv, "name") == 0) {
2761 } else if (strcmp(*argv, "quiet") == 0) {
2762 newShell.echoOff = eq;
2764 } else if (strcmp(*argv, "echo") == 0) {
2765 newShell.echoOn = eq;
2767 } else if (strcmp(*argv, "filter") == 0) {
2768 newShell.noPrint = eq;
2770 } else if (strcmp(*argv, "echoFlag") == 0) {
2773 } else if (strcmp(*argv, "errFlag") == 0) {
2776 } else if (strcmp(*argv, "hasErrCtl") == 0) {
2777 newShell.hasErrCtl = (*eq == 'Y' || *eq == 'y' ||
2778 *eq == 'T' || *eq == 't');
2780 } else if (strcmp(*argv, "check") == 0) {
2781 newShell.errCheck = eq;
2783 } else if (strcmp(*argv, "ignore") == 0) {
2784 newShell.ignErr = eq;
2787 Parse_Error(PARSE_FATAL, "unknown keyword in shell "
2788 "specification '%s'", *argv);
2794 * Some checks (could be more)
2797 if ((newShell.echoOn != NULL) ^ (newShell.echoOff != NULL))
2798 Parse_Error(PARSE_FATAL, "Shell must have either both "
2799 "echoOff and echoOn or none of them");
2801 if (newShell.echoOn != NULL && newShell.echoOff)
2802 newShell.hasEchoCtl = TRUE;
2807 * If no path was given, the user wants one of the pre-defined
2808 * shells, yes? So we find the one s/he wants with the help of
2809 * JobMatchShell and set things up the right way. shellPath
2810 * will be set up by Job_Init.
2812 if (newShell.name == NULL) {
2813 Parse_Error(PARSE_FATAL,
2814 "Neither path nor name specified");
2817 if ((sh = JobMatchShell(newShell.name)) == NULL) {
2818 Parse_Error(PARSE_FATAL, "%s: no matching shell",
2825 * The user provided a path. If s/he gave nothing else
2826 * (fullSpec is FALSE), try and find a matching shell in the
2827 * ones we know of. Else we just take the specification at its
2828 * word and copy it to a new location. In either case, we need
2829 * to record the path the user gave for the shell.
2832 shellPath = estrdup(path);
2833 if (newShell.name == NULL) {
2834 /* get the base name as the name */
2835 path = strrchr(path, '/');
2841 newShell.name = path;
2845 if ((sh = JobMatchShell(newShell.name)) == NULL) {
2846 Parse_Error(PARSE_FATAL,
2847 "%s: no matching shell", newShell.name);
2851 sh = JobCopyShell(&newShell);
2855 /* set the new shell */
2856 JobFreeShell(commandShell);
2859 shellName = commandShell->name;
2866 * Handle the receipt of an interrupt.
2869 * All children are killed. Another job will be started if the
2870 * .INTERRUPT target was given.
2873 JobInterrupt(int runINTERRUPT, int signo)
2875 Job *job; /* job descriptor in that element */
2876 GNode *interrupt; /* the node describing the .INTERRUPT target */
2878 aborting = ABORT_INTERRUPT;
2880 TAILQ_FOREACH(job, &jobs, link) {
2881 if (!Targ_Precious(job->node)) {
2882 char *file = (job->node->path == NULL ?
2883 job->node->name : job->node->path);
2885 if (!noExecute && eunlink(file) != -1) {
2886 Error("*** %s removed", file);
2890 DEBUGF(JOB, ("JobInterrupt passing signal to child "
2891 "%jd.\n", (intmax_t)job->pid));
2892 KILL(job->pid, signo);
2896 if (runINTERRUPT && !touchFlag) {
2898 * clear the interrupted flag because we would get an
2899 * infinite loop otherwise.
2903 interrupt = Targ_FindNode(".INTERRUPT", TARG_NOCREATE);
2904 if (interrupt != NULL) {
2905 ignoreErrors = FALSE;
2907 JobStart(interrupt, JOB_IGNDOTS, (Job *)NULL);
2910 Job_CatchChildren(!usePipes);
2918 * Do final processing such as the running of the commands
2919 * attached to the .END target.
2922 * Number of errors reported.
2928 if (postCommands != NULL && !Lst_IsEmpty(&postCommands->commands)) {
2930 Error("Errors reported so .END ignored");
2932 JobStart(postCommands, JOB_SPECIAL | JOB_IGNDOTS, NULL);
2936 Job_CatchChildren(!usePipes);
2951 * Waits for all running jobs to finish and returns. Sets 'aborting'
2952 * to ABORT_WAIT to prevent other jobs from starting.
2955 * Currently running jobs finish.
2961 aborting = ABORT_WAIT;
2962 while (nJobs != 0) {
2964 Job_CatchChildren(!usePipes);
2971 * Abort all currently running jobs without handling output or anything.
2972 * This function is to be called only in the event of a major
2973 * error. Most definitely NOT to be called from JobInterrupt.
2976 * All children are killed, not just the firstborn
2981 Job *job; /* the job descriptor in that element */
2984 aborting = ABORT_ERROR;
2987 TAILQ_FOREACH(job, &jobs, link) {
2989 * kill the child process with increasingly drastic
2990 * signals to make darn sure it's dead.
2992 KILL(job->pid, SIGINT);
2993 KILL(job->pid, SIGKILL);
2998 * Catch as many children as want to report in at first, then give up
3000 while (waitpid((pid_t)-1, &foo, WNOHANG) > 0)
3006 * Tries to restart stopped jobs if there are slots available.
3007 * Note that this tries to restart them regardless of pending errors.
3008 * It's not good to leave stopped jobs lying around!
3011 * Resumes(and possibly migrates) jobs.
3014 JobRestartJobs(void)
3018 while (!jobFull && (job = TAILQ_FIRST(&stoppedJobs)) != NULL) {
3019 DEBUGF(JOB, ("Job queue is not full. "
3020 "Restarting a stopped job.\n"));
3021 TAILQ_REMOVE(&stoppedJobs, job, link);
3028 * Execute the command in cmd, and return the output of that command
3032 * A string containing the output of the command, or the empty string
3033 * If error is not NULL, it contains the reason for the command failure
3034 * Any output sent to stderr in the child process is passed to stderr,
3035 * and not captured in the string.
3038 * The string must be freed by the caller.
3041 Cmd_Exec(const char *cmd, const char **error)
3043 int fds[2]; /* Pipe streams */
3044 int status; /* command exit status */
3045 Buffer *buf; /* buffer to store the result */
3052 if (shellPath == NULL)
3055 * Open a pipe for fetching its output
3057 if (pipe(fds) == -1) {
3058 *error = "Couldn't create pipe for \"%s\"";
3062 /* Set close-on-exec on read side of pipe. */
3063 fcntl(fds[0], F_SETFD, fcntl(fds[0], F_GETFD) | FD_CLOEXEC);
3065 ps.in = STDIN_FILENO;
3067 ps.err = STDERR_FILENO;
3069 ps.merge_errors = 0;
3073 /* Set up arguments for shell */
3074 ps.argv = emalloc(4 * sizeof(char *));
3075 ps.argv[0] = strdup(shellName);
3076 ps.argv[1] = strdup("-c");
3077 ps.argv[2] = strdup(cmd);
3081 * Fork. Warning since we are doing vfork() instead of fork(),
3082 * do not allocate memory in the child process!
3084 if ((ps.child_pid = vfork()) == -1) {
3085 *error = "Couldn't exec \"%s\"";
3087 } else if (ps.child_pid == 0) {
3100 close(fds[1]); /* No need for the writing half of the pipe. */
3103 char result[BUFSIZ];
3105 rcnt = read(fds[0], result, sizeof(result));
3107 Buf_AddBytes(buf, (size_t)rcnt, (Byte *)result);
3108 } while (rcnt > 0 || (rcnt == -1 && errno == EINTR));
3111 *error = "Error reading shell's output for \"%s\"";
3114 * Close the input side of the pipe.
3118 status = ProcWait(&ps);
3120 *error = "\"%s\" returned non-zero status";
3122 Buf_StripNewlines(buf);
3131 const char *cp; /* Pointer to string of shell meta-characters */
3133 for (cp = "#=|^(){};&<>*?[]:$`\\\n"; *cp != '\0'; cp++) {
3134 meta[(unsigned char)*cp] = 1;
3137 * The null character serves as a sentinel in the string.
3143 * Interrupt handler - set flag and defer handling to the main code
3146 CompatCatchSig(int signo)
3149 interrupted = signo;
3153 *-----------------------------------------------------------------------
3154 * CompatInterrupt --
3155 * Interrupt the creation of the current target and remove it if
3156 * it ain't precious.
3162 * The target is removed and the process exits. If .INTERRUPT exists,
3163 * its commands are run first WITH INTERRUPTS IGNORED..
3165 *-----------------------------------------------------------------------
3168 CompatInterrupt(int signo)
3171 sigset_t nmask, omask;
3174 sigemptyset(&nmask);
3175 sigaddset(&nmask, SIGINT);
3176 sigaddset(&nmask, SIGTERM);
3177 sigaddset(&nmask, SIGHUP);
3178 sigaddset(&nmask, SIGQUIT);
3179 sigprocmask(SIG_SETMASK, &nmask, &omask);
3181 /* prevent recursion in evaluation of .INTERRUPT */
3184 if (curTarg != NULL && !Targ_Precious(curTarg)) {
3186 char *file = Var_Value(TARGET, curTarg, &p1);
3188 if (!noExecute && eunlink(file) != -1) {
3189 printf("*** %s removed\n", file);
3195 * Run .INTERRUPT only if hit with interrupt signal
3197 if (signo == SIGINT) {
3198 gn = Targ_FindNode(".INTERRUPT", TARG_NOCREATE);
3200 LST_FOREACH(ln, &gn->commands) {
3201 if (Compat_RunCommand(Lst_Datum(ln), gn))
3207 sigprocmask(SIG_SETMASK, &omask, NULL);
3209 if (signo == SIGQUIT)
3211 signal(signo, SIG_DFL);
3212 kill(getpid(), signo);
3216 *-----------------------------------------------------------------------
3217 * Compat_RunCommand --
3218 * Execute the next command for a target. If the command returns an
3219 * error, the node's made field is set to ERROR and creation stops.
3220 * The node from which the command came is also given.
3223 * 0 if the command succeeded, 1 if an error occurred.
3226 * The node's 'made' field may be set to ERROR.
3228 *-----------------------------------------------------------------------
3231 Compat_RunCommand(char *cmd, GNode *gn)
3233 char *cmdStart; /* Start of expanded command */
3235 Boolean silent; /* Don't print command */
3236 Boolean doit; /* Execute even in -n */
3237 Boolean errCheck; /* Check errors */
3238 int reason; /* Reason for child's death */
3239 int status; /* Description of child's death */
3240 LstNode *cmdNode; /* Node where current command is located */
3241 char **av; /* Argument vector for thing to exec */
3242 char *cmd_save; /* saved cmd */
3245 silent = gn->type & OP_SILENT;
3246 errCheck = !(gn->type & OP_IGNORE);
3249 cmdNode = Lst_Member(&gn->commands, cmd);
3250 cmdStart = Buf_Peel(Var_Subst(cmd, gn, FALSE));
3253 * brk_string will return an argv with a NULL in av[0], thus causing
3254 * execvp() to choke and die horribly. Besides, how can we execute a
3255 * null command? In any case, we warn the user that the command
3256 * expanded to nothing (is this the right thing to do?).
3258 if (*cmdStart == '\0') {
3260 Error("%s expands to empty string", cmd);
3265 Lst_Replace(cmdNode, cmdStart);
3267 if ((gn->type & OP_SAVE_CMDS) && (gn != ENDNode)) {
3268 Lst_AtEnd(&ENDNode->commands, cmdStart);
3270 } else if (strcmp(cmdStart, "...") == 0) {
3271 gn->type |= OP_SAVE_CMDS;
3275 while (*cmd == '@' || *cmd == '-' || *cmd == '+') {
3279 silent = DEBUG(LOUD) ? FALSE : TRUE;
3288 if (!meta[0]) /* we came here from jobs */
3295 while (isspace((unsigned char)*cmd))
3299 * Print the command before echoing if we're not supposed to be quiet
3300 * for this one. We also print the command if -n given, but not if '+'.
3302 if (!silent || (noExecute && !doit)) {
3303 printf("%s\n", cmd);
3308 * If we're not supposed to execute any commands, this is as far as
3311 if (!doit && noExecute) {
3316 * Search for meta characters in the command. If there are no meta
3317 * characters, there's no need to execute a shell to execute the
3320 for (cp = cmd; !meta[(unsigned char)*cp]; cp++)
3325 * If *cp isn't the null character, we hit a "meta" character
3326 * and need to pass the command off to the shell.
3332 const char *sh_builtin[] = {
3333 "alias", "cd", "eval", "exec",
3334 "exit", "read", "set", "ulimit",
3335 "unalias", "umask", "unset", "wait",
3340 * Break the command into words to form an argument
3341 * vector we can execute. brk_string sticks our name
3342 * in av[0], so we have to skip over it...
3344 av = brk_string(cmd, NULL, TRUE);
3347 for (p = sh_builtin; *p != 0; p++) {
3348 if (strcmp(av[0], *p) == 0) {
3350 * This command must be passed by the shell
3351 * for other reasons.. or.. possibly not at
3360 ps.in = STDIN_FILENO;
3361 ps.out = STDOUT_FILENO;
3362 ps.err = STDERR_FILENO;
3364 ps.merge_errors = 0;
3370 * We give the shell the -e flag as well as -c if it's
3371 * supposed to exit when it hits an error.
3373 ps.argv = emalloc(4 * sizeof(char *));
3374 ps.argv[0] = strdup(shellName);
3375 ps.argv[1] = strdup(errCheck ? "-ec" : "-c");
3376 ps.argv[2] = strdup(cmd);
3383 * Fork and execute the single command. If the fork fails, we abort.
3384 * Warning since we are doing vfork() instead of fork(),
3385 * do not allocate memory in the child process!
3387 if ((ps.child_pid = vfork()) == -1) {
3388 Fatal("Could not fork");
3390 } else if (ps.child_pid == 0) {
3406 * we need to print out the command associated with this
3407 * Gnode in Targ_PrintCmd from Targ_PrintGraph when debugging
3408 * at level g2, in main(), Fatal() and DieHorribly(),
3409 * therefore do not free it when debugging.
3411 if (!DEBUG(GRAPH2)) {
3413 Lst_Replace(cmdNode, cmd_save);
3417 * The child is off and running. Now all we can do is wait...
3419 reason = ProcWait(&ps);
3422 CompatInterrupt(interrupted);
3425 * Deocde and report the reason child exited, then
3426 * indicate how we handled it.
3428 if (WIFEXITED(reason)) {
3429 status = WEXITSTATUS(reason);
3433 printf("*** Error code %d", status);
3435 } else if (WIFSTOPPED(reason)) {
3436 status = WSTOPSIG(reason);
3438 status = WTERMSIG(reason);
3439 printf("*** Signal %d", status);
3450 printf(" (continuing)\n");
3455 * Continue executing
3456 * commands for this target.
3457 * If we return 0, this will
3460 printf(" (ignored)\n");
3467 *-----------------------------------------------------------------------
3469 * Make a target, given the parent, to abort if necessary.
3472 * If an error is detected and not being ignored, the process exits.
3474 *-----------------------------------------------------------------------
3477 CompatMake(GNode *gn, GNode *pgn)
3481 if (gn->type & OP_USE) {
3482 Make_HandleUse(gn, pgn);
3484 } else if (gn->made == UNMADE) {
3486 * First mark ourselves to be made, then apply whatever
3487 * transformations the suffix module thinks are necessary.
3488 * Once that's done, we can descend and make all our children.
3489 * If any of them has an error but the -k flag was given, our
3490 * 'make' field will be set FALSE again. This is our signal to
3491 * not attempt to do anything but abort our parent as well.
3494 gn->made = BEINGMADE;
3496 LST_FOREACH(ln, &gn->children)
3497 CompatMake(Lst_Datum(ln), gn);
3504 if (Lst_Member(&gn->iParents, pgn) != NULL) {
3506 Var_Set(IMPSRC, Var_Value(TARGET, gn, &p1), pgn);
3511 * All the children were made ok. Now cmtime contains the
3512 * modification time of the newest child, we need to find out
3513 * if we exist and when we were modified last. The criteria for
3514 * datedness are defined by the Make_OODate function.
3516 DEBUGF(MAKE, ("Examining %s...", gn->name));
3517 if (!Make_OODate(gn)) {
3518 gn->made = UPTODATE;
3519 DEBUGF(MAKE, ("up-to-date.\n"));
3522 DEBUGF(MAKE, ("out-of-date.\n"));
3526 * If the user is just seeing if something is out-of-date,
3527 * exit now to tell him/her "yes".
3534 * We need to be re-made. We also have to make sure we've got
3535 * a $? variable. To be nice, we also define the $> variable
3536 * using Make_DoAllVar().
3541 * Alter our type to tell if errors should be ignored or things
3542 * should not be printed so Compat_RunCommand knows what to do.
3544 if (Targ_Ignore(gn)) {
3545 gn->type |= OP_IGNORE;
3547 if (Targ_Silent(gn)) {
3548 gn->type |= OP_SILENT;
3551 if (Job_CheckCommands(gn, Fatal)) {
3553 * Our commands are ok, but we still have to worry
3554 * about the -t flag...
3558 LST_FOREACH(ln, &gn->commands) {
3559 if (Compat_RunCommand(Lst_Datum(ln),
3565 Job_Touch(gn, gn->type & OP_SILENT);
3571 if (gn->made != ERROR) {
3573 * If the node was made successfully, mark it so, update
3574 * its modification time and timestamp all its parents.
3575 * Note that for .ZEROTIME targets, the timestamping
3576 * isn't done. This is to keep its state from affecting
3577 * that of its parent.
3582 * We can't re-stat the thing, but we can at least take
3583 * care of rules where a target depends on a source that
3584 * actually creates the target, but only if it has
3592 * mv y.tab.o parse.o
3593 * cmp -s y.tab.h parse.h || mv y.tab.h parse.h
3595 * In this case, if the definitions produced by yacc
3596 * haven't changed from before, parse.h won't have been
3597 * updated and gn->mtime will reflect the current
3598 * modification time for parse.h. This is something of a
3599 * kludge, I admit, but it's a useful one..
3601 * XXX: People like to use a rule like
3605 * To force things that depend on FRC to be made, so we
3606 * have to check for gn->children being empty as well...
3608 if (!Lst_IsEmpty(&gn->commands) ||
3609 Lst_IsEmpty(&gn->children)) {
3614 * This is what Make does and it's actually a good
3615 * thing, as it allows rules like
3617 * cmp -s y.tab.h parse.h || cp y.tab.h parse.h
3619 * to function as intended. Unfortunately, thanks to
3620 * the stateless nature of NFS (and the speed of this
3621 * program), there are times when the modification time
3622 * of a file created on a remote machine will not be
3623 * modified before the stat() implied by the Dir_MTime
3624 * occurs, thus leading us to believe that the file
3625 * is unchanged, wreaking havoc with files that depend
3628 * I have decided it is better to make too much than to
3629 * make too little, so this stuff is commented out
3630 * unless you're sure it's ok.
3633 if (noExecute || Dir_MTime(gn) == 0) {
3636 if (gn->cmtime > gn->mtime)
3637 gn->mtime = gn->cmtime;
3638 DEBUGF(MAKE, ("update time: %s\n",
3639 Targ_FmtTime(gn->mtime)));
3641 if (!(gn->type & OP_EXEC)) {
3642 pgn->childMade = TRUE;
3643 Make_TimeStamp(pgn, gn);
3646 } else if (keepgoing) {
3652 printf("\n\nStop in %s.\n",
3653 Var_Value(".CURDIR", gn, &p1));
3657 } else if (gn->made == ERROR) {
3659 * Already had an error when making this beastie. Tell the
3664 if (Lst_Member(&gn->iParents, pgn) != NULL) {
3666 Var_Set(IMPSRC, Var_Value(TARGET, gn, &p1), pgn);
3671 Error("Graph cycles through %s\n", gn->name);
3676 if ((gn->type & OP_EXEC) == 0) {
3677 pgn->childMade = TRUE;
3678 Make_TimeStamp(pgn, gn);
3682 if ((gn->type & OP_EXEC) == 0) {
3683 Make_TimeStamp(pgn, gn);
3695 *-----------------------------------------------------------------------
3697 * Start making again, given a list of target nodes.
3705 *-----------------------------------------------------------------------
3708 Compat_Run(Lst *targs)
3710 GNode *gn = NULL; /* Current root target */
3711 int error_cnt; /* Number of targets not remade due to errors */
3715 Shell_Init(); /* Set up shell. */
3717 if (signal(SIGINT, SIG_IGN) != SIG_IGN) {
3718 signal(SIGINT, CompatCatchSig);
3720 if (signal(SIGTERM, SIG_IGN) != SIG_IGN) {
3721 signal(SIGTERM, CompatCatchSig);
3723 if (signal(SIGHUP, SIG_IGN) != SIG_IGN) {
3724 signal(SIGHUP, CompatCatchSig);
3726 if (signal(SIGQUIT, SIG_IGN) != SIG_IGN) {
3727 signal(SIGQUIT, CompatCatchSig);
3730 ENDNode = Targ_FindNode(".END", TARG_CREATE);
3732 * If the user has defined a .BEGIN target, execute the commands
3736 gn = Targ_FindNode(".BEGIN", TARG_NOCREATE);
3738 LST_FOREACH(ln, &gn->commands) {
3739 if (Compat_RunCommand(Lst_Datum(ln), gn))
3742 if (gn->made == ERROR) {
3743 printf("\n\nStop.\n");
3750 * For each entry in the list of targets to create, call CompatMake on
3751 * it to create the thing. CompatMake will leave the 'made' field of gn
3752 * in one of several states:
3753 * UPTODATE gn was already up-to-date
3754 * MADE gn was recreated successfully
3755 * ERROR An error occurred while gn was being created
3756 * ABORTED gn was not remade because one of its inferiors
3757 * could not be made due to errors.
3760 while (!Lst_IsEmpty(targs)) {
3761 gn = Lst_DeQueue(targs);
3764 if (gn->made == UPTODATE) {
3765 printf("`%s' is up to date.\n", gn->name);
3766 } else if (gn->made == ABORTED) {
3767 printf("`%s' not remade because of errors.\n",
3774 * If the user has defined a .END target, run its commands.
3776 if (error_cnt == 0) {
3777 LST_FOREACH(ln, &ENDNode->commands) {
3778 if (Compat_RunCommand(Lst_Datum(ln), gn))
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