Remove prototype for usage(), and move the definition above its use.
[dragonfly.git] / usr.bin / make / job.c
CommitLineData
edf6dd37 1/*-
9a309bcc
MD
2 * Copyright (c) 1988, 1989, 1990, 1993
3 * The Regents of the University of California. All rights reserved.
984263bc
MD
4 * Copyright (c) 1988, 1989 by Adam de Boor
5 * Copyright (c) 1989 by Berkeley Softworks
6 * All rights reserved.
7 *
8 * This code is derived from software contributed to Berkeley by
9 * Adam de Boor.
10 *
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.
26 *
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.
1de703da
MD
38 *
39 * @(#)job.c 8.2 (Berkeley) 3/19/94
1901cbd2 40 * $FreeBSD: src/usr.bin/make/job.c,v 1.75 2005/02/10 14:32:14 harti Exp $
53e478a3 41 * $DragonFly: src/usr.bin/make/job.c,v 1.84 2005/04/28 18:48:31 okumoto Exp $
984263bc
MD
42 */
43
984263bc 44#ifndef OLD_JOKE
b83dbac0 45#define OLD_JOKE 0
984263bc
MD
46#endif /* OLD_JOKE */
47
48/*-
49 * job.c --
50 * handle the creation etc. of our child processes.
51 *
52 * Interface:
df64c352 53 * Job_Make Start the creation of the given target.
984263bc 54 *
df64c352
MO
55 * Job_CatchChildren
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.
984263bc 62 *
df64c352
MO
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.
984263bc 68 *
df64c352
MO
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.
984263bc 73 *
df64c352 74 * Job_Full Return TRUE if the job table is filled.
984263bc 75 *
df64c352 76 * Job_Empty Return TRUE if the job table is completely empty.
984263bc 77 *
df64c352
MO
78 * Job_ParseShell Given the line following a .SHELL target, parse the
79 * line as a shell specification. Returns FAILURE if the
80 * spec was incorrect.
984263bc 81 *
df64c352
MO
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.
984263bc 86 *
df64c352
MO
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.
984263bc 90 *
df64c352
MO
91 * Job_CheckCommands
92 * Verify that the commands for a target are ok. Provide
93 * them if necessary and possible.
984263bc 94 *
df64c352 95 * Job_Touch Update a target without really updating it.
984263bc 96 *
df64c352 97 * Job_Wait Wait for all currently-running jobs to finish.
29004ef5
MO
98 *
99 * compat.c --
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.
105 *
106 * Interface:
107 * Compat_Run Initialize things for this module and recreate
108 * thems as need creatin'
984263bc
MD
109 */
110
9de1d47a 111#include <sys/queue.h>
984263bc 112#include <sys/types.h>
9863ce62 113#include <sys/select.h>
984263bc 114#include <sys/stat.h>
edf6dd37
MO
115#ifdef USE_KQUEUE
116#include <sys/event.h>
117#endif
984263bc 118#include <sys/wait.h>
9863ce62 119#include <ctype.h>
984263bc 120#include <errno.h>
ef1537e7 121#include <fcntl.h>
9de1d47a 122#include <inttypes.h>
edf6dd37 123#include <string.h>
984263bc 124#include <signal.h>
9863ce62 125#include <stdlib.h>
d0f0ba15 126#include <unistd.h>
ef1537e7 127#include <utime.h>
9863ce62 128
9863ce62 129#include "arch.h"
b0ef9278 130#include "buf.h"
5f530f85 131#include "config.h"
984263bc 132#include "dir.h"
9863ce62
MO
133#include "globals.h"
134#include "GNode.h"
984263bc 135#include "job.h"
9863ce62
MO
136#include "make.h"
137#include "parse.h"
984263bc 138#include "pathnames.h"
9863ce62 139#include "str.h"
5f530f85 140#include "suff.h"
9863ce62
MO
141#include "targ.h"
142#include "util.h"
143#include "var.h"
a34ec481 144
6999645d
MO
145#define TMPPAT "/tmp/makeXXXXXXXXXX"
146
147#ifndef USE_KQUEUE
148/*
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
152 */
153#define SEL_SEC 2
154#define SEL_USEC 0
155#endif /* !USE_KQUEUE */
156
7051be4f
MO
157/*
158 * Job Table definitions.
159 *
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.
163 *
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.
167 */
168#define JOB_BUFSIZE 1024
169typedef struct Job {
9de1d47a 170 pid_t pid; /* The child's process ID */
7051be4f
MO
171
172 struct GNode *node; /* The target the child is making */
173
174 /*
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.
177 */
178 LstNode *tailCmds;
179
180 /*
181 * An FILE* for writing out the commands. This is only
182 * used before the job is actually started.
183 */
184 FILE *cmdFILE;
185
186 /*
187 * A word of flags which determine how the module handles errors,
188 * echoing, etc. for the job
189 */
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 */
b04c4147 195#define JOB_IGNDOTS 0x008 /* Ignore "..." lines when processing
7051be4f
MO
196 * commands */
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,
200 * for some reason */
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 */
204
205 /* union for handling shell's output */
206 union {
207 /*
208 * This part is used when usePipes is true.
b04c4147 209 * The output is being caught via a pipe and the descriptors
7051be4f
MO
210 * of our pipe, an array in which output is line buffered and
211 * the current position in that buffer are all maintained for
212 * each job.
213 */
214 struct {
215 /*
216 * Input side of pipe associated with
217 * job's output channel
218 */
219 int op_inPipe;
220
221 /*
222 * Output side of pipe associated with job's
223 * output channel
224 */
225 int op_outPipe;
226
227 /*
228 * Buffer for storing the output of the
229 * job, line by line
230 */
231 char op_outBuf[JOB_BUFSIZE + 1];
232
233 /* Current position in op_outBuf */
234 int op_curPos;
235 } o_pipe;
236
237 /*
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.
241 */
242 struct {
243 /* Name of file to which shell output was rerouted */
244 char of_outFile[sizeof(TMPPAT)];
245
246 /*
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
250 */
251 int of_outFd;
252 } o_file;
253
254 } output; /* Data for tracking a shell's output */
9de1d47a
MO
255
256 TAILQ_ENTRY(Job) link; /* list link */
7051be4f
MO
257} Job;
258
b04c4147
MO
259#define outPipe output.o_pipe.op_outPipe
260#define inPipe output.o_pipe.op_inPipe
7051be4f
MO
261#define outBuf output.o_pipe.op_outBuf
262#define curPos output.o_pipe.op_curPos
263#define outFile output.o_file.of_outFile
b04c4147 264#define outFd output.o_file.of_outFd
7051be4f 265
9de1d47a
MO
266TAILQ_HEAD(JobList, Job);
267
7051be4f
MO
268/*
269 * Shell Specifications:
270 *
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.
277 */
278#define DEF_SHELL_STRUCT(TAG, CONST) \
279struct TAG { \
280 /* \
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. \
285 */ \
286 CONST char *name; \
287 \
288 /* True if both echoOff and echoOn defined */ \
289 Boolean hasEchoCtl; \
290 \
291 CONST char *echoOff; /* command to turn off echo */ \
292 CONST char *echoOn; /* command to turn it back on */\
293 \
294 /* \
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 \
299 */ \
300 CONST char *noPrint; \
7051be4f
MO
301 \
302 /* set if can control error checking for individual commands */ \
303 Boolean hasErrCtl; \
304 \
305 /* string to turn error checking on */ \
306 CONST char *errCheck; \
307 \
308 /* string to turn off error checking */ \
309 CONST char *ignErr; \
310 \
311 CONST char *echo; /* command line flag: echo commands */ \
312 CONST char *exit; /* command line flag: exit on error */ \
313}
314
315DEF_SHELL_STRUCT(Shell,);
316DEF_SHELL_STRUCT(CShell, const);
317
984263bc
MD
318/*
319 * error handling variables
320 */
df64c352
MO
321static int errors = 0; /* number of errors reported */
322static 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 */
984263bc
MD
326
327/*
328 * XXX: Avoid SunOS bug... FILENO() is fp->_file, and file
329 * is a char! So when we go above 127 we turn negative!
330 */
fbfaa208 331#define FILENO(a) ((unsigned)fileno(a))
984263bc
MD
332
333/*
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
336 * all the time.
337 */
df64c352
MO
338static GNode *postCommands;
339
340/*
341 * The number of commands actually printed for a target. Should this
342 * number be 0, no shell will be executed.
343 */
344static int numCommands;
984263bc
MD
345
346/*
347 * Return values from JobStart.
348 */
df64c352 349#define JOB_RUNNING 0 /* Job is running */
b04c4147 350#define JOB_ERROR 1 /* Error in starting the job */
df64c352
MO
351#define JOB_FINISHED 2 /* The job is already finished */
352#define JOB_STOPPED 3 /* The job is stopped */
984263bc 353
984263bc
MD
354/*
355 * Descriptions for various shells.
356 */
7051be4f 357static const struct CShell shells[] = {
df64c352
MO
358 /*
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.
362 */
363 {
364 "csh",
3120aaed 365 TRUE, "unset verbose", "set verbose", "unset verbose",
df64c352
MO
366 FALSE, "echo \"%s\"\n", "csh -c \"%s || exit 0\"",
367 "v", "e",
368 },
369 /*
370 * SH description. Echo control is also possible and, under
371 * sun UNIX anyway, one can even control error checking.
372 */
373 {
374 "sh",
3120aaed 375 TRUE, "set -", "set -v", "set -",
df64c352 376 TRUE, "set -e", "set +e",
984263bc 377#ifdef OLDBOURNESHELL
df64c352 378 FALSE, "echo \"%s\"\n", "sh -c '%s || exit 0'\n",
984263bc 379#endif
df64c352
MO
380 "v", "e",
381 },
382 /*
383 * KSH description. The Korn shell has a superset of
384 * the Bourne shell's functionality.
385 */
386 {
387 "ksh",
3120aaed 388 TRUE, "set -", "set -v", "set -",
df64c352
MO
389 TRUE, "set -e", "set +e",
390 "v", "e",
391 },
984263bc 392};
984263bc 393
df64c352
MO
394/*
395 * This is the shell to which we pass all commands in the Makefile.
396 * It is set by the Job_ParseShell function.
397 */
7051be4f 398static struct Shell *commandShell = NULL;
4ae6896a
MO
399static char *shellPath = NULL; /* full pathname of executable image */
400static char *shellName = NULL; /* last component of shell */
984263bc 401
df64c352 402int maxJobs; /* The most children we can run at once */
9de1d47a 403static int nJobs; /* The number of children currently running */
0a7e0b85
MO
404
405/* The structures that describe them */
9de1d47a 406static struct JobList jobs = TAILQ_HEAD_INITIALIZER(jobs);
0a7e0b85 407
b04c4147 408static Boolean jobFull; /* Flag to tell when the job table is full. It
984263bc 409 * is set TRUE when (1) the total number of
a34ec481 410 * running jobs equals the maximum allowed */
218b5aa1
MD
411#ifdef USE_KQUEUE
412static int kqfd; /* File descriptor obtained by kqueue() */
413#else
b04c4147 414static fd_set outputs; /* Set of descriptors of pipes connected to
984263bc
MD
415 * the output channels of children */
416#endif
417
b04c4147 418static GNode *lastNode; /* The node for which output was most recently
984263bc 419 * produced. */
b04c4147 420static const char *targFmt; /* Format string to use to head output from a
984263bc
MD
421 * job when it's not the most-recent job heard
422 * from */
423
a34ec481
JS
424#define TARG_FMT "--- %s ---\n" /* Default format */
425#define MESSAGE(fp, gn) \
fbfaa208 426 fprintf(fp, targFmt, gn->name);
984263bc
MD
427
428/*
a34ec481
JS
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
984263bc 432 * when the next job finishes.
0a7e0b85
MO
433 *
434 * Lst of Job structures describing jobs that were stopped due to
435 * concurrency limits or externally
984263bc 436 */
9de1d47a 437static struct JobList stoppedJobs = TAILQ_HEAD_INITIALIZER(stoppedJobs);
984263bc 438
9de1d47a
MO
439static int fifoFd; /* Fd of our job fifo */
440static char fifoName[] = "/tmp/make_fifo_XXXXXXXXX";
441static int fifoMaster;
984263bc 442
89a1b397
JS
443static sig_atomic_t interrupted;
444
445
984263bc
MD
446#if defined(USE_PGRP) && defined(SYSV)
447# define KILL(pid, sig) killpg(-(pid), (sig))
448#else
449# if defined(USE_PGRP)
450# define KILL(pid, sig) killpg((pid), (sig))
451# else
452# define KILL(pid, sig) kill((pid), (sig))
453# endif
454#endif
455
456/*
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.
461 */
913800f5 462#define W_SETMASKED(st, val, fun) \
984263bc 463 { \
fbfaa208 464 int sh = (int)~0; \
984263bc
MD
465 int mask = fun(sh); \
466 \
467 for (sh = 0; ((mask >> sh) & 1) == 0; sh++) \
468 continue; \
469 *(st) = (*(st) & ~mask) | ((val) << sh); \
470 }
471
913800f5
MD
472#define W_SETTERMSIG(st, val) W_SETMASKED(st, val, WTERMSIG)
473#define W_SETEXITSTATUS(st, val) W_SETMASKED(st, val, WEXITSTATUS)
984263bc 474
56e5ee18
MO
475/**
476 * Information used to create a new process.
477 */
30bb92cf 478typedef struct ProcStuff {
56e5ee18
MO
479 int in; /* stdin for new process */
480 int out; /* stdout for new process */
481 int err; /* stderr for new process */
482
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 */
8a538fd1
MO
486
487 char **argv;
ebf8e7fe
MO
488
489 pid_t child_pid;
30bb92cf
MO
490} ProcStuff;
491
2d8a3be7
EN
492static void JobRestart(Job *);
493static int JobStart(GNode *, int, Job *);
2d8a3be7 494static void JobDoOutput(Job *, Boolean);
7051be4f 495static struct Shell *JobMatchShell(const char *);
2d8a3be7
EN
496static void JobInterrupt(int, int);
497static void JobRestartJobs(void);
8a538fd1 498static void ProcExec(ProcStuff *) __dead2;
53e478a3
MO
499static int Compat_RunCommand(char *, struct GNode *);
500
984263bc 501
29004ef5
MO
502/*
503 * The following array is used to make a fast determination of which
504 * characters are interpreted specially by the shell. If a command
505 * contains any of these characters, it is executed by the shell, not
506 * directly by us.
507 */
508static char meta[256];
509
510static GNode *curTarg = NULL;
511static GNode *ENDNode;
512
30bb92cf
MO
513/**
514 * Replace the current process.
515 */
516static void
8a538fd1 517ProcExec(ProcStuff *ps)
30bb92cf 518{
92ba64bf
MO
519 if (ps->in != STDIN_FILENO) {
520 /*
521 * Redirect the child's stdin to the input fd
522 * and reset it to the beginning (again).
523 */
524 if (dup2(ps->in, STDIN_FILENO) == -1)
525 Punt("Cannot dup2: %s", strerror(errno));
526 lseek(STDIN_FILENO, (off_t)0, SEEK_SET);
527 }
528
8f019ad2
MO
529 if (ps->out != STDOUT_FILENO) {
530 /*
92ba64bf 531 * Redirect the child's stdout to the output fd.
8f019ad2
MO
532 */
533 if (dup2(ps->out, STDOUT_FILENO) == -1)
534 Punt("Cannot dup2: %s", strerror(errno));
535 close(ps->out);
536 }
537
b582d309
MO
538 if (ps->err != STDERR_FILENO) {
539 /*
540 * Redirect the child's stderr to the err fd.
541 */
542 if (dup2(ps->err, STDERR_FILENO) == -1)
543 Punt("Cannot dup2: %s", strerror(errno));
544 close(ps->err);
545 }
546
327b38ef
MO
547 if (ps->merge_errors) {
548 /*
549 * Send stderr to parent process too.
550 */
551 if (dup2(STDOUT_FILENO, STDERR_FILENO) == -1)
552 Punt("Cannot dup2: %s", strerror(errno));
553 }
554
0f3f80a6
MO
555 /*
556 * The file descriptors for stdin, stdout, or stderr might
557 * have been marked close-on-exec. Clear the flag on all
558 * of them.
559 */
560 fcntl(STDIN_FILENO, F_SETFD,
561 fcntl(STDIN_FILENO, F_GETFD) & (~FD_CLOEXEC));
562 fcntl(STDOUT_FILENO, F_SETFD,
563 fcntl(STDOUT_FILENO, F_GETFD) & (~FD_CLOEXEC));
564 fcntl(STDERR_FILENO, F_SETFD,
565 fcntl(STDERR_FILENO, F_GETFD) & (~FD_CLOEXEC));
566
30bb92cf
MO
567 if (ps->pgroup) {
568#ifdef USE_PGRP
569 /*
327b38ef
MO
570 * Become a process group leader, so we can kill it and all
571 * its descendants in one fell swoop, by killing its process
572 * family, but not commit suicide.
30bb92cf
MO
573 */
574#if defined(SYSV)
575 setsid();
576#else
577 setpgid(0, getpid());
578#endif
579#endif /* USE_PGRP */
580 }
581
257e9734 582 if (ps->searchpath) {
8a538fd1 583 execvp(ps->argv[0], ps->argv);
30bb92cf 584
8a538fd1 585 write(STDERR_FILENO, ps->argv[0], strlen(ps->argv[0]));
257e9734
MO
586 write(STDERR_FILENO, ":", 1);
587 write(STDERR_FILENO, strerror(errno), strlen(strerror(errno)));
588 write(STDERR_FILENO, "\n", 1);
589 } else {
8a538fd1 590 execv(shellPath, ps->argv);
257e9734
MO
591
592 write(STDERR_FILENO,
593 "Could not execute shell\n",
594 sizeof("Could not execute shell"));
595 }
30bb92cf
MO
596
597 /*
598 * Since we are the child process, exit without flushing buffers.
599 */
600 _exit(1);
30bb92cf
MO
601}
602
ebf8e7fe 603/**
6319dcf0 604 * Wait for child process to terminate.
ebf8e7fe
MO
605 */
606static int
607ProcWait(ProcStuff *ps)
608{
609 pid_t pid;
610 int status;
611
612 /*
613 * Wait for the process to exit.
614 */
6319dcf0
MO
615 for (;;) {
616 pid = wait(&status);
617 if (pid == -1 && errno != EINTR) {
618 Fatal("error in wait: %d", pid);
619 /* NOTREACHED */
620 }
621 if (pid == ps->child_pid) {
622 break;
623 }
624 if (interrupted) {
625 break;
626 }
ebf8e7fe
MO
627 }
628
629 return (status);
630}
631
df64c352 632/**
89a1b397 633 * JobCatchSignal
df64c352
MO
634 * Got a signal. Set global variables and hope that someone will
635 * handle it.
89a1b397
JS
636 */
637static void
638JobCatchSig(int signo)
639{
640
641 interrupted = signo;
642}
643
df64c352 644/**
984263bc 645 * JobPassSig --
a34ec481 646 * Pass a signal on to all local jobs if
984263bc
MD
647 * USE_PGRP is defined, then die ourselves.
648 *
984263bc
MD
649 * Side Effects:
650 * We die by the same signal.
984263bc
MD
651 */
652static void
84de9e23 653JobPassSig(int signo)
984263bc 654{
3120aaed 655 Job *job;
df64c352
MO
656 sigset_t nmask, omask;
657 struct sigaction act;
658
659 sigemptyset(&nmask);
660 sigaddset(&nmask, signo);
661 sigprocmask(SIG_SETMASK, &nmask, &omask);
662
663 DEBUGF(JOB, ("JobPassSig(%d) called.\n", signo));
3120aaed
MO
664 TAILQ_FOREACH(job, &jobs, link) {
665 DEBUGF(JOB, ("JobPassSig passing signal %d to child %jd.\n",
666 signo, (intmax_t)job->pid));
667 KILL(job->pid, signo);
668 }
df64c352
MO
669
670 /*
671 * Deal with proper cleanup based on the signal received. We only run
672 * the .INTERRUPT target if the signal was in fact an interrupt.
673 * The other three termination signals are more of a "get out *now*"
674 * command.
675 */
676 if (signo == SIGINT) {
677 JobInterrupt(TRUE, signo);
9de1d47a 678 } else if (signo == SIGHUP || signo == SIGTERM || signo == SIGQUIT) {
df64c352
MO
679 JobInterrupt(FALSE, signo);
680 }
681
682 /*
683 * Leave gracefully if SIGQUIT, rather than core dumping.
684 */
685 if (signo == SIGQUIT) {
686 signo = SIGINT;
687 }
688
689 /*
690 * Send ourselves the signal now we've given the message to everyone
691 * else. Note we block everything else possible while we're getting
692 * the signal. This ensures that all our jobs get continued when we
693 * wake up before we take any other signal.
694 * XXX this comment seems wrong.
695 */
696 act.sa_handler = SIG_DFL;
697 sigemptyset(&act.sa_mask);
698 act.sa_flags = 0;
699 sigaction(signo, &act, NULL);
700
701 DEBUGF(JOB, ("JobPassSig passing signal to self, mask = %x.\n",
702 ~0 & ~(1 << (signo - 1))));
703 signal(signo, SIG_DFL);
704
705 KILL(getpid(), signo);
706
707 signo = SIGCONT;
3120aaed
MO
708 TAILQ_FOREACH(job, &jobs, link) {
709 DEBUGF(JOB, ("JobPassSig passing signal %d to child %jd.\n",
710 signo, (intmax_t)job->pid));
711 KILL(job->pid, signo);
712 }
df64c352
MO
713
714 sigprocmask(SIG_SETMASK, &omask, NULL);
715 sigprocmask(SIG_SETMASK, &omask, NULL);
716 act.sa_handler = JobPassSig;
717 sigaction(signo, &act, NULL);
984263bc
MD
718}
719
df64c352 720/**
984263bc
MD
721 * JobPrintCommand --
722 * Put out another command for the given job. If the command starts
723 * with an @ or a - we process it specially. In the former case,
724 * so long as the -s and -n flags weren't given to make, we stick
725 * a shell-specific echoOff command in the script. In the latter,
726 * we ignore errors for the entire job, unless the shell has error
727 * control.
728 * If the command is just "..." we take all future commands for this
729 * job to be commands to be executed once the entire graph has been
730 * made and return non-zero to signal that the end of the commands
731 * was reached. These commands are later attached to the postCommands
9a309bcc 732 * node and executed by Job_Finish when all things are done.
3637a988 733 * This function is called from JobStart via LST_FOREACH.
984263bc
MD
734 *
735 * Results:
736 * Always 0, unless the command was "..."
737 *
738 * Side Effects:
739 * If the command begins with a '-' and the shell has no error control,
740 * the JOB_IGNERR flag is set in the job descriptor.
741 * If the command is "..." and we're not ignoring such things,
742 * tailCmds is set to the successor node of the cmd.
743 * numCommands is incremented if the command is actually printed.
984263bc
MD
744 */
745static int
3120aaed 746JobPrintCommand(char *cmd, Job *job)
984263bc 747{
df64c352 748 Boolean noSpecials; /* true if we shouldn't worry about
271e747f
MO
749 * inserting special commands into
750 * the input stream. */
df64c352 751 Boolean shutUp = FALSE; /* true if we put a no echo command
271e747f 752 * into the command file */
df64c352 753 Boolean errOff = FALSE; /* true if we turned error checking
271e747f
MO
754 * off before printing the command
755 * and need to turn it back on */
df64c352
MO
756 const char *cmdTemplate;/* Template to use when printing the command */
757 char *cmdStart; /* Start of expanded command */
758 LstNode *cmdNode; /* Node for replacing the command */
df64c352
MO
759
760 noSpecials = (noExecute && !(job->node->type & OP_MAKE));
761
762 if (strcmp(cmd, "...") == 0) {
763 job->node->type |= OP_SAVE_CMDS;
764 if ((job->flags & JOB_IGNDOTS) == 0) {
765 job->tailCmds =
766 Lst_Succ(Lst_Member(&job->node->commands, cmd));
767 return (1);
768 }
769 return (0);
984263bc 770 }
984263bc 771
df64c352
MO
772#define DBPRINTF(fmt, arg) \
773 DEBUGF(JOB, (fmt, arg)); \
774 fprintf(job->cmdFILE, fmt, arg); \
775 fflush(job->cmdFILE);
984263bc 776
df64c352 777 numCommands += 1;
984263bc 778
df64c352
MO
779 /*
780 * For debugging, we replace each command with the result of expanding
781 * the variables in the command.
782 */
783 cmdNode = Lst_Member(&job->node->commands, cmd);
68061244 784
e576a084 785 cmd = Buf_Peel(Var_Subst(cmd, job->node, FALSE));
df64c352 786 cmdStart = cmd;
68061244 787
df64c352 788 Lst_Replace(cmdNode, cmdStart);
984263bc 789
df64c352 790 cmdTemplate = "%s\n";
984263bc 791
df64c352
MO
792 /*
793 * Check for leading @', -' or +'s to control echoing, error checking,
794 * and execution on -n.
795 */
796 while (*cmd == '@' || *cmd == '-' || *cmd == '+') {
797 switch (*cmd) {
40763d81 798
df64c352
MO
799 case '@':
800 shutUp = DEBUG(LOUD) ? FALSE : TRUE;
801 break;
40763d81 802
df64c352
MO
803 case '-':
804 errOff = TRUE;
805 break;
40763d81 806
df64c352
MO
807 case '+':
808 if (noSpecials) {
809 /*
810 * We're not actually exececuting anything...
811 * but this one needs to be - use compat mode
812 * just for it.
813 */
3120aaed 814 Compat_RunCommand(cmd, job->node);
df64c352
MO
815 return (0);
816 }
817 break;
818 }
819 cmd++;
984263bc 820 }
984263bc 821
df64c352
MO
822 while (isspace((unsigned char)*cmd))
823 cmd++;
984263bc 824
df64c352
MO
825 if (shutUp) {
826 if (!(job->flags & JOB_SILENT) && !noSpecials &&
984263bc
MD
827 commandShell->hasEchoCtl) {
828 DBPRINTF("%s\n", commandShell->echoOff);
984263bc 829 } else {
df64c352 830 shutUp = FALSE;
984263bc 831 }
df64c352
MO
832 }
833
834 if (errOff) {
835 if (!(job->flags & JOB_IGNERR) && !noSpecials) {
836 if (commandShell->hasErrCtl) {
837 /*
838 * We don't want the error-control commands
839 * showing up either, so we turn off echoing
840 * while executing them. We could put another
841 * field in the shell structure to tell
842 * JobDoOutput to look for this string too,
843 * but why make it any more complex than
844 * it already is?
845 */
846 if (!(job->flags & JOB_SILENT) && !shutUp &&
847 commandShell->hasEchoCtl) {
848 DBPRINTF("%s\n", commandShell->echoOff);
849 DBPRINTF("%s\n", commandShell->ignErr);
850 DBPRINTF("%s\n", commandShell->echoOn);
851 } else {
852 DBPRINTF("%s\n", commandShell->ignErr);
853 }
854 } else if (commandShell->ignErr &&
9de1d47a 855 *commandShell->ignErr != '\0') {
df64c352
MO
856 /*
857 * The shell has no error control, so we need to
858 * be weird to get it to ignore any errors from
859 * the command. If echoing is turned on, we turn
860 * it off and use the errCheck template to echo
861 * the command. Leave echoing off so the user
862 * doesn't see the weirdness we go through to
863 * ignore errors. Set cmdTemplate to use the
864 * weirdness instead of the simple "%s\n"
865 * template.
866 */
867 if (!(job->flags & JOB_SILENT) && !shutUp &&
868 commandShell->hasEchoCtl) {
869 DBPRINTF("%s\n", commandShell->echoOff);
870 DBPRINTF(commandShell->errCheck, cmd);
871 shutUp = TRUE;
872 }
873 cmdTemplate = commandShell->ignErr;
874 /*
875 * The error ignoration (hee hee) is already
876 * taken care of by the ignErr template, so
877 * pretend error checking is still on.
878 */
879 errOff = FALSE;
880 } else {
881 errOff = FALSE;
882 }
883 } else {
884 errOff = FALSE;
885 }
886 }
887
888 DBPRINTF(cmdTemplate, cmd);
889
890 if (errOff) {
984263bc 891 /*
df64c352
MO
892 * If echoing is already off, there's no point in issuing the
893 * echoOff command. Otherwise we issue it and pretend it was on
894 * for the whole command...
984263bc 895 */
df64c352 896 if (!shutUp && !(job->flags & JOB_SILENT) &&
984263bc
MD
897 commandShell->hasEchoCtl) {
898 DBPRINTF("%s\n", commandShell->echoOff);
984263bc
MD
899 shutUp = TRUE;
900 }
df64c352 901 DBPRINTF("%s\n", commandShell->errCheck);
984263bc 902 }
df64c352
MO
903 if (shutUp) {
904 DBPRINTF("%s\n", commandShell->echoOn);
905 }
906 return (0);
984263bc
MD
907}
908
df64c352 909/**
984263bc
MD
910 * JobClose --
911 * Called to close both input and output pipes when a job is finished.
912 *
984263bc
MD
913 * Side Effects:
914 * The file descriptors associated with the job are closed.
984263bc
MD
915 */
916static void
84de9e23 917JobClose(Job *job)
984263bc 918{
fbfaa208 919
df64c352 920 if (usePipes) {
a34ec481 921#if !defined(USE_KQUEUE)
df64c352 922 FD_CLR(job->inPipe, &outputs);
984263bc 923#endif
df64c352
MO
924 if (job->outPipe != job->inPipe) {
925 close(job->outPipe);
926 }
927 JobDoOutput(job, TRUE);
928 close(job->inPipe);
929 } else {
930 close(job->outFd);
931 JobDoOutput(job, TRUE);
932 }
984263bc
MD
933}
934
df64c352 935/**
984263bc
MD
936 * JobFinish --
937 * Do final processing for the given job including updating
938 * parents and starting new jobs as available/necessary. Note
939 * that we pay no attention to the JOB_IGNERR flag here.
940 * This is because when we're called because of a noexecute flag
941 * or something, jstat.w_status is 0 and when called from
942 * Job_CatchChildren, the status is zeroed if it s/b ignored.
943 *
984263bc
MD
944 * Side Effects:
945 * Some nodes may be put on the toBeMade queue.
946 * Final commands for the job are placed on postCommands.
947 *
948 * If we got an error and are aborting (aborting == ABORT_ERROR) and
949 * the job list is now empty, we are done for the day.
950 * If we recognized an error (errors !=0), we set the aborting flag
951 * to ABORT_ERROR so no more jobs will be started.
984263bc 952 */
984263bc 953static void
84de9e23 954JobFinish(Job *job, int *status)
984263bc 955{
df64c352
MO
956 Boolean done;
957 LstNode *ln;
984263bc 958
afdaaa9e
MO
959 if (WIFEXITED(*status)) {
960 int job_status = WEXITSTATUS(*status);
df64c352 961
afdaaa9e 962 JobClose(job);
df64c352 963 /*
afdaaa9e
MO
964 * Deal with ignored errors in -B mode. We need to
965 * print a message telling of the ignored error as
966 * well as setting status.w_status to 0 so the next
967 * command gets run. To do this, we set done to be
968 * TRUE if in -B mode and the job exited non-zero.
df64c352 969 */
afdaaa9e
MO
970 if (job_status == 0) {
971 done = FALSE;
972 } else {
973 if (job->flags & JOB_IGNERR) {
974 done = TRUE;
975 } else {
976 /*
977 * If it exited non-zero and either we're
978 * doing things our way or we're not ignoring
979 * errors, the job is finished. Similarly, if
980 * the shell died because of a signal the job
981 * is also finished. In these cases, finish
982 * out the job's output before printing the
983 * exit status...
984 */
985 done = TRUE;
986 if (job->cmdFILE != NULL &&
987 job->cmdFILE != stdout) {
988 fclose(job->cmdFILE);
989 }
df64c352 990
afdaaa9e
MO
991 }
992 }
993 } else if (WIFSIGNALED(*status)) {
994 if (WTERMSIG(*status) == SIGCONT) {
995 /*
996 * No need to close things down or anything.
997 */
998 done = FALSE;
999 } else {
1000 /*
1001 * If it exited non-zero and either we're
1002 * doing things our way or we're not ignoring
1003 * errors, the job is finished. Similarly, if
1004 * the shell died because of a signal the job
1005 * is also finished. In these cases, finish
1006 * out the job's output before printing the
1007 * exit status...
1008 */
1009 JobClose(job);
1010 if (job->cmdFILE != NULL &&
1011 job->cmdFILE != stdout) {
1012 fclose(job->cmdFILE);
1013 }
1014 done = TRUE;
1015 }
984263bc 1016 } else {
df64c352
MO
1017 /*
1018 * No need to close things down or anything.
1019 */
1020 done = FALSE;
984263bc
MD
1021 }
1022
6c8f235e
MO
1023 if (WIFEXITED(*status)) {
1024 if (done || DEBUG(JOB)) {
1025 FILE *out;
df64c352 1026
6c8f235e
MO
1027 if (compatMake &&
1028 !usePipes &&
1029 (job->flags & JOB_IGNERR)) {
1030 /*
1031 * If output is going to a file and this job
1032 * is ignoring errors, arrange to have the
1033 * exit status sent to the output file as
1034 * well.
1035 */
1036 out = fdopen(job->outFd, "w");
1037 if (out == NULL)
1038 Punt("Cannot fdopen");
1039 } else {
1040 out = stdout;
1041 }
984263bc 1042
9de1d47a
MO
1043 DEBUGF(JOB, ("Process %jd exited.\n",
1044 (intmax_t)job->pid));
6c8f235e
MO
1045
1046 if (WEXITSTATUS(*status) == 0) {
1047 if (DEBUG(JOB)) {
1048 if (usePipes && job->node != lastNode) {
1049 MESSAGE(out, job->node);
1050 lastNode = job->node;
1051 }
1052 fprintf(out,
1053 "*** Completed successfully\n");
1054 }
1055 } else {
df64c352
MO
1056 if (usePipes && job->node != lastNode) {
1057 MESSAGE(out, job->node);
1058 lastNode = job->node;
1059 }
1060 fprintf(out, "*** Error code %d%s\n",
6c8f235e
MO
1061 WEXITSTATUS(*status),
1062 (job->flags & JOB_IGNERR) ?
1063 "(ignored)" : "");
df64c352
MO
1064
1065 if (job->flags & JOB_IGNERR) {
1066 *status = 0;
1067 }
df64c352
MO
1068 }
1069
df64c352 1070 fflush(out);
6c8f235e
MO
1071 }
1072 } else if (WIFSIGNALED(*status)) {
1073 if (done || DEBUG(JOB) || (WTERMSIG(*status) == SIGCONT)) {
1074 FILE *out;
df64c352 1075
6c8f235e
MO
1076 if (compatMake &&
1077 !usePipes &&
1078 (job->flags & JOB_IGNERR)) {
1079 /*
1080 * If output is going to a file and this job
1081 * is ignoring errors, arrange to have the
1082 * exit status sent to the output file as
1083 * well.
1084 */
1085 out = fdopen(job->outFd, "w");
1086 if (out == NULL)
1087 Punt("Cannot fdopen");
1088 } else {
1089 out = stdout;
df64c352 1090 }
6c8f235e
MO
1091
1092 if (WTERMSIG(*status) == SIGCONT) {
df64c352 1093 /*
6c8f235e
MO
1094 * If the beastie has continued, shift the
1095 * Job from the stopped list to the running
1096 * one (or re-stop it if concurrency is
1097 * exceeded) and go and get another child.
df64c352 1098 */
6c8f235e
MO
1099 if (job->flags & (JOB_RESUME | JOB_RESTART)) {
1100 if (usePipes && job->node != lastNode) {
1101 MESSAGE(out, job->node);
1102 lastNode = job->node;
1103 }
1104 fprintf(out, "*** Continued\n");
1105 }
1106 if (!(job->flags & JOB_CONTINUING)) {
1107 DEBUGF(JOB, ("Warning: process %jd was not "
1108 "continuing.\n", (intmax_t) job->pid));
1109#ifdef notdef
1110 /*
1111 * We don't really want to restart a
1112 * job from scratch just because it
1113 * continued, especially not without
1114 * killing the continuing process!
1115 * That's why this is ifdef'ed out.
1116 * FD - 9/17/90
1117 */
1118 JobRestart(job);
984263bc 1119#endif
6c8f235e
MO
1120 }
1121 job->flags &= ~JOB_CONTINUING;
1122 TAILQ_INSERT_TAIL(&jobs, job, link);
1123 nJobs += 1;
1124 DEBUGF(JOB, ("Process %jd is continuing locally.\n",
1125 (intmax_t) job->pid));
1126 if (nJobs == maxJobs) {
1127 jobFull = TRUE;
1128 DEBUGF(JOB, ("Job queue is full.\n"));
1129 }
1130 fflush(out);
1131 return;
1132
1133 } else {
1134 if (usePipes && job->node != lastNode) {
1135 MESSAGE(out, job->node);
1136 lastNode = job->node;
1137 }
1138 fprintf(out,
1139 "*** Signal %d\n", WTERMSIG(*status));
1140 fflush(out);
df64c352 1141 }
6c8f235e
MO
1142 }
1143 } else {
1144 /* STOPPED */
1145 FILE *out;
df64c352 1146
6c8f235e
MO
1147 if (compatMake && !usePipes && (job->flags & JOB_IGNERR)) {
1148 /*
1149 * If output is going to a file and this job
1150 * is ignoring errors, arrange to have the
1151 * exit status sent to the output file as
1152 * well.
1153 */
1154 out = fdopen(job->outFd, "w");
1155 if (out == NULL)
1156 Punt("Cannot fdopen");
df64c352 1157 } else {
6c8f235e 1158 out = stdout;
df64c352
MO
1159 }
1160
6c8f235e
MO
1161 DEBUGF(JOB, ("Process %jd stopped.\n", (intmax_t) job->pid));
1162 if (usePipes && job->node != lastNode) {
1163 MESSAGE(out, job->node);
1164 lastNode = job->node;
1165 }
1166 fprintf(out, "*** Stopped -- signal %d\n", WSTOPSIG(*status));
1167 job->flags |= JOB_RESUME;
1168 TAILQ_INSERT_TAIL(&stoppedJobs, job, link);
df64c352 1169 fflush(out);
6c8f235e 1170 return;
df64c352
MO
1171 }
1172
984263bc 1173 /*
df64c352
MO
1174 * Now handle the -B-mode stuff. If the beast still isn't finished,
1175 * try and restart the job on the next command. If JobStart says it's
1176 * ok, it's ok. If there's an error, this puppy is done.
984263bc 1177 */
df64c352
MO
1178 if (compatMake && WIFEXITED(*status) &&
1179 Lst_Succ(job->node->compat_command) != NULL) {
1180 switch (JobStart(job->node, job->flags & JOB_IGNDOTS, job)) {
1181 case JOB_RUNNING:
1182 done = FALSE;
1183 break;
1184 case JOB_ERROR:
1185 done = TRUE;
1186 W_SETEXITSTATUS(status, 1);
1187 break;
1188 case JOB_FINISHED:
1189 /*
1190 * If we got back a JOB_FINISHED code, JobStart has
1191 * already called Make_Update and freed the job
1192 * descriptor. We set done to false here to avoid fake
1193 * cycles and double frees. JobStart needs to do the
1194 * update so we can proceed up the graph when given
1195 * the -n flag..
1196 */
1197 done = FALSE;
1198 break;
1199 default:
1200 break;
1201 }
1202 } else {
1203 done = TRUE;
984263bc 1204 }
14ba7c54 1205
9de1d47a
MO
1206 if (done && aborting != ABORT_ERROR &&
1207 aborting != ABORT_INTERRUPT && *status == 0) {
df64c352
MO
1208 /*
1209 * As long as we aren't aborting and the job didn't return a
1210 * non-zero status that we shouldn't ignore, we call
1211 * Make_Update to update the parents. In addition, any saved
1212 * commands for the node are placed on the .END target.
1213 */
1214 for (ln = job->tailCmds; ln != NULL; ln = LST_NEXT(ln)) {
1215 Lst_AtEnd(&postCommands->commands,
e576a084
MO
1216 Buf_Peel(
1217 Var_Subst(Lst_Datum(ln), job->node, FALSE)));
df64c352 1218 }
984263bc 1219
df64c352
MO
1220 job->node->made = MADE;
1221 Make_Update(job->node);
1222 free(job);
984263bc 1223
df64c352
MO
1224 } else if (*status != 0) {
1225 errors += 1;
1226 free(job);
1227 }
1228
1229 JobRestartJobs();
984263bc 1230
984263bc 1231 /*
df64c352 1232 * Set aborting if any error.
984263bc 1233 */
9de1d47a 1234 if (errors && !keepgoing && aborting != ABORT_INTERRUPT) {
df64c352
MO
1235 /*
1236 * If we found any errors in this batch of children and the -k
1237 * flag wasn't given, we set the aborting flag so no more jobs
1238 * get started.
1239 */
1240 aborting = ABORT_ERROR;
1241 }
1242
9de1d47a 1243 if (aborting == ABORT_ERROR && Job_Empty()) {
df64c352
MO
1244 /*
1245 * If we are aborting and the job table is now empty, we finish.
1246 */
1247 Finish(errors);
1248 }
984263bc
MD
1249}
1250
df64c352
MO
1251/**
1252 * Job_Touch
984263bc 1253 * Touch the given target. Called by JobStart when the -t flag was
84de9e23 1254 * given. Prints messages unless told to be silent.
984263bc 1255 *
984263bc
MD
1256 * Side Effects:
1257 * The data modification of the file is changed. In addition, if the
1258 * file did not exist, it is created.
984263bc
MD
1259 */
1260void
84de9e23 1261Job_Touch(GNode *gn, Boolean silent)
984263bc 1262{
df64c352
MO
1263 int streamID; /* ID of stream opened to do the touch */
1264 struct utimbuf times; /* Times for utime() call */
984263bc 1265
df64c352
MO
1266 if (gn->type & (OP_JOIN | OP_USE | OP_EXEC | OP_OPTIONAL)) {
1267 /*
1268 * .JOIN, .USE, .ZEROTIME and .OPTIONAL targets are "virtual"
1269 * targets and, as such, shouldn't really be created.
1270 */
1271 return;
1272 }
984263bc 1273
df64c352
MO
1274 if (!silent) {
1275 fprintf(stdout, "touch %s\n", gn->name);
1276 fflush(stdout);
1277 }
984263bc 1278
df64c352
MO
1279 if (noExecute) {
1280 return;
1281 }
984263bc 1282
df64c352
MO
1283 if (gn->type & OP_ARCHV) {
1284 Arch_Touch(gn);
1285 } else if (gn->type & OP_LIB) {
1286 Arch_TouchLib(gn);
1287 } else {
1288 char *file = gn->path ? gn->path : gn->name;
1289
1290 times.actime = times.modtime = now;
1291 if (utime(file, &times) < 0) {
1292 streamID = open(file, O_RDWR | O_CREAT, 0666);
1293
1294 if (streamID >= 0) {
1295 char c;
1296
1297 /*
1298 * Read and write a byte to the file to change
1299 * the modification time, then close the file.
1300 */
1301 if (read(streamID, &c, 1) == 1) {
1302 lseek(streamID, (off_t)0, SEEK_SET);
1303 write(streamID, &c, 1);
1304 }
1305
1306 close(streamID);
1307 } else {
1308 fprintf(stdout, "*** couldn't touch %s: %s",
1309 file, strerror(errno));
1310 fflush(stdout);
1311 }
984263bc 1312 }
984263bc 1313 }
984263bc
MD
1314}
1315
df64c352
MO
1316/**
1317 * Job_CheckCommands
984263bc
MD
1318 * Make sure the given node has all the commands it needs.
1319 *
1320 * Results:
1321 * TRUE if the commands list is/was ok.
1322 *
1323 * Side Effects:
1324 * The node will have commands from the .DEFAULT rule added to it
1325 * if it needs them.
984263bc
MD
1326 */
1327Boolean
84de9e23 1328Job_CheckCommands(GNode *gn, void (*abortProc)(const char *, ...))
984263bc 1329{
fbfaa208 1330
df64c352
MO
1331 if (OP_NOP(gn->type) && Lst_IsEmpty(&gn->commands) &&
1332 (gn->type & OP_LIB) == 0) {
1333 /*
1334 * No commands. Look for .DEFAULT rule from which we might infer
1335 * commands.
1336 */
9de1d47a 1337 if (DEFAULT != NULL && !Lst_IsEmpty(&DEFAULT->commands)) {
df64c352
MO
1338 char *p1;
1339 /*
1340 * Make only looks for a .DEFAULT if the node was
1341 * never the target of an operator, so that's what we
1342 * do too. If a .DEFAULT was given, we substitute its
1343 * commands for gn's commands and set the IMPSRC
1344 * variable to be the target's name The DEFAULT node
1345 * acts like a transformation rule, in that gn also
1346 * inherits any attributes or sources attached to
1347 * .DEFAULT itself.
1348 */
1349 Make_HandleUse(DEFAULT, gn);
1350 Var_Set(IMPSRC, Var_Value(TARGET, gn, &p1), gn);
1351 free(p1);
1352
1353 } else if (Dir_MTime(gn) == 0) {
1354 /*
1355 * The node wasn't the target of an operator we have
1356 * no .DEFAULT rule to go on and the target doesn't
1357 * already exist. There's nothing more we can do for
1358 * this branch. If the -k flag wasn't given, we stop
1359 * in our tracks, otherwise we just don't update
1360 * this node's parents so they never get examined.
1361 */
1362 static const char msg[] =
1363 "make: don't know how to make";
1364
1365 if (gn->type & OP_OPTIONAL) {
1366 fprintf(stdout, "%s %s(ignored)\n",
1367 msg, gn->name);
1368 fflush(stdout);
1369 } else if (keepgoing) {
1370 fprintf(stdout, "%s %s(continuing)\n",
1371 msg, gn->name);
1372 fflush(stdout);
1373 return (FALSE);
1374 } else {
984263bc 1375#if OLD_JOKE
df64c352
MO
1376 if (strcmp(gn->name,"love") == 0)
1377 (*abortProc)("Not war.");
1378 else
984263bc 1379#endif
df64c352
MO
1380 (*abortProc)("%s %s. Stop",
1381 msg, gn->name);
1382 return (FALSE);
1383 }
1384 }
984263bc 1385 }
df64c352 1386 return (TRUE);
984263bc 1387}
984263bc 1388
df64c352
MO
1389/**
1390 * JobExec
984263bc
MD
1391 * Execute the shell for the given job. Called from JobStart and
1392 * JobRestart.
1393 *
984263bc
MD
1394 * Side Effects:
1395 * A shell is executed, outputs is altered and the Job structure added
1396 * to the job table.
984263bc
MD
1397 */
1398static void
84de9e23 1399JobExec(Job *job, char **argv)
984263bc 1400{
8a538fd1 1401 ProcStuff ps;
984263bc 1402
df64c352 1403 if (DEBUG(JOB)) {
b04c4147 1404 int i;
df64c352
MO
1405
1406 DEBUGF(JOB, ("Running %s\n", job->node->name));
1407 DEBUGF(JOB, ("\tCommand: "));
1408 for (i = 0; argv[i] != NULL; i++) {
1409 DEBUGF(JOB, ("%s ", argv[i]));
1410 }
1411 DEBUGF(JOB, ("\n"));
984263bc 1412 }
df64c352 1413
984263bc 1414 /*
df64c352
MO
1415 * Some jobs produce no output and it's disconcerting to have
1416 * no feedback of their running (since they produce no output, the
1417 * banner with their name in it never appears). This is an attempt to
1418 * provide that feedback, even if nothing follows it.
984263bc 1419 */
9de1d47a 1420 if (lastNode != job->node && (job->flags & JOB_FIRST) &&
df64c352
MO
1421 !(job->flags & JOB_SILENT)) {
1422 MESSAGE(stdout, job->node);
1423 lastNode = job->node;
1424 }
1425
3e10c271
MO
1426 ps.in = FILENO(job->cmdFILE);
1427 if (usePipes) {
1428 /*
1429 * Set up the child's output to be routed through the
1430 * pipe we've created for it.
1431 */
1432 ps.out = job->outPipe;
1433 } else {
1434 /*
1435 * We're capturing output in a file, so we duplicate
1436 * the descriptor to the temporary file into the
1437 * standard output.
1438 */
1439 ps.out = job->outFd;
1440 }
1441 ps.err = STDERR_FILENO;
1442
1443 ps.merge_errors = 1;
1444 ps.pgroup = 1;
1445 ps.searchpath = 0;
1446
1447 ps.argv = argv;
1448
1449 /*
7c2a9959
MO
1450 * Fork. Warning since we are doing vfork() instead of fork(),
1451 * do not allocate memory in the child process!
3e10c271 1452 */
ebf8e7fe 1453 if ((ps.child_pid = vfork()) == -1) {
df64c352
MO
1454 Punt("Cannot fork");
1455
ebf8e7fe 1456 } else if (ps.child_pid == 0) {
9de1d47a
MO
1457 /*
1458 * Child
1459 */
df64c352
MO
1460 if (fifoFd >= 0)
1461 close(fifoFd);
1462
8a538fd1 1463 ProcExec(&ps);
257e9734 1464 /* NOTREACHED */
984263bc 1465
53a3ba77 1466 } else {
9de1d47a 1467 /*
53a3ba77 1468 * Parent
9de1d47a 1469 */
ebf8e7fe 1470 job->pid = ps.child_pid;
53a3ba77
MO
1471
1472 if (usePipes && (job->flags & JOB_FIRST)) {
1473 /*
1474 * The first time a job is run for a node, we set the
1475 * current position in the buffer to the beginning and
1476 * mark another stream to watch in the outputs mask.
1477 */
218b5aa1 1478#ifdef USE_KQUEUE
53a3ba77 1479 struct kevent kev[2];
218b5aa1 1480#endif
53a3ba77 1481 job->curPos = 0;
984263bc 1482
a34ec481 1483#if defined(USE_KQUEUE)
53a3ba77
MO
1484 EV_SET(&kev[0], job->inPipe, EVFILT_READ, EV_ADD, 0, 0, job);
1485 EV_SET(&kev[1], job->pid, EVFILT_PROC,
1486 EV_ADD | EV_ONESHOT, NOTE_EXIT, 0, NULL);
1487 if (kevent(kqfd, kev, 2, NULL, 0, NULL) != 0) {
1488 /*
1489 * kevent() will fail if the job is already
1490 * finished
1491 */
1492 if (errno != EINTR && errno != EBADF && errno != ESRCH)
1493 Punt("kevent: %s", strerror(errno));
1494 }
984263bc 1495#else
53a3ba77 1496 FD_SET(job->inPipe, &outputs);
a34ec481 1497#endif /* USE_KQUEUE */
53a3ba77 1498 }
984263bc 1499
53a3ba77
MO
1500 if (job->cmdFILE != NULL && job->cmdFILE != stdout) {
1501 fclose(job->cmdFILE);
1502 job->cmdFILE = NULL;
1503 }
984263bc 1504
53a3ba77
MO
1505 /*
1506 * Now the job is actually running, add it to the table.
1507 */
1508 nJobs += 1;
1509 TAILQ_INSERT_TAIL(&jobs, job, link);
1510 if (nJobs == maxJobs) {
1511 jobFull = TRUE;
1512 }
df64c352 1513 }
984263bc
MD
1514}
1515
df64c352
MO
1516/**
1517 * JobMakeArgv
984263bc 1518 * Create the argv needed to execute the shell for a given job.
984263bc
MD
1519 */
1520static void
84de9e23 1521JobMakeArgv(Job *job, char **argv)
984263bc 1522{
df64c352
MO
1523 int argc;
1524 static char args[10]; /* For merged arguments */
984263bc 1525
df64c352
MO
1526 argv[0] = shellName;
1527 argc = 1;
984263bc 1528
9de1d47a
MO
1529 if ((commandShell->exit && *commandShell->exit != '-') ||
1530 (commandShell->echo && *commandShell->echo != '-')) {
df64c352
MO
1531 /*
1532 * At least one of the flags doesn't have a minus before it, so
1533 * merge them together. Have to do this because the *(&(@*#*&#$#
1534 * Bourne shell thinks its second argument is a file to source.
1535 * Grrrr. Note the ten-character limitation on the combined
1536 * arguments.
1537 */
9de1d47a
MO
1538 sprintf(args, "-%s%s", (job->flags & JOB_IGNERR) ? "" :
1539 commandShell->exit ? commandShell->exit : "",
1540 (job->flags & JOB_SILENT) ? "" :
1541 commandShell->echo ? commandShell->echo : "");
df64c352
MO
1542
1543 if (args[1]) {
1544 argv[argc] = args;
1545 argc++;
1546 }
1547 } else {
1548 if (!(job->flags & JOB_IGNERR) && commandShell->exit) {
1549 argv[argc] = commandShell->exit;
1550 argc++;
1551 }
1552 if (!(job->flags & JOB_SILENT) && commandShell->echo) {
1553 argv[argc] = commandShell->echo;
1554 argc++;
1555 }
1556 }
1557 argv[argc] = NULL;
984263bc
MD
1558}
1559
df64c352
MO
1560/**
1561 * JobRestart
9de1d47a
MO
1562 * Restart a job that stopped for some reason. The job must be neither
1563 * on the jobs nor on the stoppedJobs list.
984263bc 1564 *
984263bc
MD
1565 * Side Effects:
1566 * jobFull will be set if the job couldn't be run.
984263bc
MD
1567 */
1568static void
84de9e23 1569JobRestart(Job *job)
984263bc 1570{
984263bc 1571
df64c352 1572 if (job->flags & JOB_RESTART) {
984263bc 1573 /*
df64c352
MO
1574 * Set up the control arguments to the shell. This is based on
1575 * the flags set earlier for this job. If the JOB_IGNERR flag
1576 * is clear, the 'exit' flag of the commandShell is used to
1577 * cause it to exit upon receiving an error. If the JOB_SILENT
1578 * flag is clear, the 'echo' flag of the commandShell is used
1579 * to get it to start echoing as soon as it starts
1580 * processing commands.
984263bc 1581 */
df64c352
MO
1582 char *argv[4];
1583
1584 JobMakeArgv(job, argv);
1585
1586 DEBUGF(JOB, ("Restarting %s...", job->node->name));
9de1d47a 1587 if (nJobs >= maxJobs && !(job->flags & JOB_SPECIAL)) {
df64c352 1588 /*
9de1d47a
MO
1589 * Not allowed to run -- put it back on the hold
1590 * queue and mark the table full
df64c352
MO
1591 */
1592 DEBUGF(JOB, ("holding\n"));
9de1d47a 1593 TAILQ_INSERT_HEAD(&stoppedJobs, job, link);
df64c352
MO
1594 jobFull = TRUE;
1595 DEBUGF(JOB, ("Job queue is full.\n"));
1596 return;
1597 } else {
1598 /*
1599 * Job may be run locally.
1600 */
1601 DEBUGF(JOB, ("running locally\n"));
1602 }
1603 JobExec(job, argv);
984263bc 1604
984263bc 1605 } else {
df64c352
MO
1606 /*
1607 * The job has stopped and needs to be restarted.
1608 * Why it stopped, we don't know...
1609 */
1610 DEBUGF(JOB, ("Resuming %s...", job->node->name));
9de1d47a
MO
1611 if ((nJobs < maxJobs || ((job->flags & JOB_SPECIAL) &&
1612 maxJobs == 0)) && nJobs != maxJobs) {
df64c352
MO
1613 /*
1614 * If we haven't reached the concurrency limit already
1615 * (or the job must be run and maxJobs is 0), it's ok
1616 * to resume it.
1617 */
1618 Boolean error;
1619 int status;
1620
1621 error = (KILL(job->pid, SIGCONT) != 0);
1622
1623 if (!error) {
1624 /*
1625 * Make sure the user knows we've continued
1626 * the beast and actually put the thing in the
1627 * job table.
1628 */
1629 job->flags |= JOB_CONTINUING;
1630 status = 0;
1631 W_SETTERMSIG(&status, SIGCONT);
1632 JobFinish(job, &status);
1633
1634 job->flags &= ~(JOB_RESUME|JOB_CONTINUING);
1635 DEBUGF(JOB, ("done\n"));
1636 } else {
1637 Error("couldn't resume %s: %s",
1638 job->node->name, strerror(errno));
1639 status = 0;
1640 W_SETEXITSTATUS(&status, 1);
1641 JobFinish(job, &status);
1642 }
1643 } else {
1644 /*
1645 * Job cannot be restarted. Mark the table as full and
1646 * place the job back on the list of stopped jobs.
1647 */
1648 DEBUGF(JOB, ("table full\n"));
9de1d47a 1649 TAILQ_INSERT_HEAD(&stoppedJobs, job, link);
df64c352
MO
1650 jobFull = TRUE;
1651 DEBUGF(JOB, ("Job queue is full.\n"));
1652 }
1653 }
984263bc
MD
1654}
1655
df64c352
MO
1656/**
1657 * JobStart
984263bc
MD
1658 * Start a target-creation process going for the target described
1659 * by the graph node gn.
1660 *
1661 * Results:
1662 * JOB_ERROR if there was an error in the commands, JOB_FINISHED
1663 * if there isn't actually anything left to do for the job and
1664 * JOB_RUNNING if the job has been started.
1665 *
1666 * Side Effects:
1667 * A new Job node is created and added to the list of running
1668 * jobs. PMake is forked and a child shell created.
984263bc
MD
1669 */
1670static int
84de9e23 1671JobStart(GNode *gn, int flags, Job *previous)
984263bc 1672{
df64c352
MO
1673 Job *job; /* new job descriptor */
1674 char *argv[4]; /* Argument vector to shell */
1675 Boolean cmdsOK; /* true if the nodes commands were all right */
1676 Boolean noExec; /* Set true if we decide not to run the job */
1677 int tfd; /* File descriptor for temp file */
1678 LstNode *ln;
9de1d47a 1679 char tfile[sizeof(TMPPAT)];
df64c352
MO
1680
1681 if (interrupted) {
1682 JobPassSig(interrupted);
1683 return (JOB_ERROR);
1684 }
1685 if (previous != NULL) {
1686 previous->flags &= ~(JOB_FIRST | JOB_IGNERR | JOB_SILENT);
1687 job = previous;
1688 } else {
1689 job = emalloc(sizeof(Job));
1690 flags |= JOB_FIRST;
1691 }
1692
1693 job->node = gn;
1694 job->tailCmds = NULL;
1695
984263bc 1696 /*
df64c352
MO
1697 * Set the initial value of the flags for this job based on the global
1698 * ones and the node's attributes... Any flags supplied by the caller
1699 * are also added to the field.
984263bc 1700 */
df64c352
MO
1701 job->flags = 0;
1702 if (Targ_Ignore(gn)) {
1703 job->flags |= JOB_IGNERR;
984263bc 1704 }
df64c352
MO
1705 if (Targ_Silent(gn)) {
1706 job->flags |= JOB_SILENT;
984263bc 1707 }
df64c352
MO
1708 job->flags |= flags;
1709
984263bc 1710 /*
df64c352
MO
1711 * Check the commands now so any attributes from .DEFAULT have a chance
1712 * to migrate to the node.
984263bc 1713 */
9de1d47a 1714 if (!compatMake && (job->flags & JOB_FIRST)) {
df64c352
MO
1715 cmdsOK = Job_CheckCommands(gn, Error);
1716 } else {
1717 cmdsOK = TRUE;
1718 }
984263bc
MD
1719
1720 /*
df64c352
MO
1721 * If the -n flag wasn't given, we open up OUR (not the child's)
1722 * temporary file to stuff commands in it. The thing is rd/wr so we
1723 * don't need to reopen it to feed it to the shell. If the -n flag
1724 * *was* given, we just set the file to be stdout. Cute, huh?
984263bc 1725 */
df64c352
MO
1726 if ((gn->type & OP_MAKE) || (!noExecute && !touchFlag)) {
1727 /*
1728 * We're serious here, but if the commands were bogus, we're
1729 * also dead...
1730 */
1731 if (!cmdsOK) {
1732 DieHorribly();
1733 }
513bf0db 1734
df64c352
MO
1735 strcpy(tfile, TMPPAT);
1736 if ((tfd = mkstemp(tfile)) == -1)
1737 Punt("Cannot create temp file: %s", strerror(errno));
1738 job->cmdFILE = fdopen(tfd, "w+");
1739 eunlink(tfile);
1740 if (job->cmdFILE == NULL) {
1741 close(tfd);
1742 Punt("Could not open %s", tfile);
1743 }
1744 fcntl(FILENO(job->cmdFILE), F_SETFD, 1);
513bf0db 1745 /*
df64c352
MO
1746 * Send the commands to the command file, flush all its
1747 * buffers then rewind and remove the thing.
513bf0db 1748 */
df64c352
MO
1749 noExec = FALSE;
1750
1751 /*
1752 * Used to be backwards; replace when start doing multiple
1753 * commands per shell.
1754 */
1755 if (compatMake) {
1756 /*
1757 * Be compatible: If this is the first time for this
1758 * node, verify its commands are ok and open the
1759 * commands list for sequential access by later
1760 * invocations of JobStart. Once that is done, we take
1761 * the next command off the list and print it to the
1762 * command file. If the command was an ellipsis, note
1763 * that there's nothing more to execute.
1764 */
1765 if (job->flags & JOB_FIRST)
1766 gn->compat_command = Lst_First(&gn->commands);
1767 else
1768 gn->compat_command =
1769 Lst_Succ(gn->compat_command);
1770
1771 if (gn->compat_command == NULL ||
1772 JobPrintCommand(Lst_Datum(gn->compat_command), job))
1773 noExec = TRUE;
1774
1775 if (noExec && !(job->flags & JOB_FIRST)) {
1776 /*
1777 * If we're not going to execute anything, the
1778 * job is done and we need to close down the
1779 * various file descriptors we've opened for
1780 * output, then call JobDoOutput to catch the
1781 * final characters or send the file to the
1782 * screen... Note that the i/o streams are only
1783 * open if this isn't the first job. Note also
1784 * that this could not be done in
1785 * Job_CatchChildren b/c it wasn't clear if
1786 * there were more commands to execute or not...
1787 */
1788 JobClose(job);
1789 }
1790 } else {
1791 /*
1792 * We can do all the commands at once. hooray for sanity
1793 */
1794 numCommands = 0;
1795 LST_FOREACH(ln, &gn->commands) {
1796 if (JobPrintCommand(Lst_Datum(ln), job))
1797 break;
1798 }
1799
1800 /*
1801 * If we didn't print out any commands to the shell
1802 * script, there's not much point in executing the
1803 * shell, is there?
1804 */
1805 if (numCommands == 0) {
1806 noExec = TRUE;
1807 }
1808 }
1809
1810 } else if (noExecute) {
1811 /*
1812 * Not executing anything -- just print all the commands to
1813 * stdout in one fell swoop. This will still set up
1814 * job->tailCmds correctly.
1815 */
1816 if (lastNode != gn) {
1817 MESSAGE(stdout, gn);
1818 lastNode = gn;
1819 }
1820 job->cmdFILE = stdout;
1821
1822 /*
1823 * Only print the commands if they're ok, but don't die if
1824 * they're not -- just let the user know they're bad and keep
1825 * going. It doesn't do any harm in this case and may do
1826 * some good.
1827 */
1828 if (cmdsOK) {
1829 LST_FOREACH(ln, &gn->commands) {
1830 if (JobPrintCommand(Lst_Datum(ln), job))
1831 break;
1832 }
1833 }
1834 /*
1835 * Don't execute the shell, thank you.
1836 */
984263bc 1837 noExec = TRUE;
df64c352 1838
984263bc 1839 } else {
df64c352
MO
1840 /*
1841 * Just touch the target and note that no shell should be
1842 * executed. Set cmdFILE to stdout to make life easier. Check
1843 * the commands, too, but don't die if they're no good -- it
1844 * does no harm to keep working up the graph.
1845 */
1846 job->cmdFILE = stdout;
1847 Job_Touch(gn, job->flags & JOB_SILENT);
1848 noExec = TRUE;
984263bc
MD
1849 }
1850
1851 /*
df64c352 1852 * If we're not supposed to execute a shell, don't.
984263bc 1853 */
df64c352
MO
1854 if (noExec) {
1855 /*
1856 * Unlink and close the command file if we opened one
1857 */
1858 if (job->cmdFILE != stdout) {
1859 if (job->cmdFILE != NULL)
1860 fclose(job->cmdFILE);
1861 } else {
1862 fflush(stdout);
1863 }
1864
1865 /*
1866 * We only want to work our way up the graph if we aren't here
1867 * because the commands for the job were no good.
1868 */
1869 if (cmdsOK) {
1870 if (aborting == 0) {
1871 for (ln = job->tailCmds; ln != NULL;
1872 ln = LST_NEXT(ln)) {
1873 Lst_AtEnd(&postCommands->commands,
e576a084
MO
1874 Buf_Peel(Var_Subst(Lst_Datum(ln),
1875 job->node, FALSE)));
df64c352
MO
1876 }
1877 job->node->made = MADE;
1878 Make_Update(job->node);
1879 }
1880 free(job);
1881 return(JOB_FINISHED);
1882 } else {
1883 free(job);
1884 return(JOB_ERROR);
984263bc 1885 }
984263bc 1886 } else {
df64c352 1887 fflush(job->cmdFILE);
984263bc 1888 }
984263bc 1889
984263bc 1890 /*
df64c352
MO
1891 * Set up the control arguments to the shell. This is based on the flags
1892 * set earlier for this job.
984263bc 1893 */
df64c352 1894 JobMakeArgv(job, argv);
984263bc 1895
df64c352
MO
1896 /*
1897 * If we're using pipes to catch output, create the pipe by which we'll
1898 * get the shell's output. If we're using files, print out that we're
1899 * starting a job and then set up its temporary-file name.
1900 */
1901 if (!compatMake || (job->flags & JOB_FIRST)) {
1902 if (usePipes) {
1903 int fd[2];
1904
1905 if (pipe(fd) == -1)
1906 Punt("Cannot create pipe: %s", strerror(errno));
1907 job->inPipe = fd[0];
1908 job->outPipe = fd[1];
1909 fcntl(job->inPipe, F_SETFD, 1);
1910 fcntl(job->outPipe, F_SETFD, 1);
1911 } else {
1912 fprintf(stdout, "Remaking `%s'\n", gn->name);
1913 fflush(stdout);
1914 strcpy(job->outFile, TMPPAT);
1915 if ((job->outFd = mkstemp(job->outFile)) == -1)
1916 Punt("cannot create temp file: %s",
1917 strerror(errno));
1918 fcntl(job->outFd, F_SETFD, 1);
984263bc 1919 }
df64c352
MO
1920 }
1921
9de1d47a 1922 if (nJobs >= maxJobs && !(job->flags & JOB_SPECIAL) && maxJobs != 0) {
984263bc 1923 /*
df64c352
MO
1924 * We've hit the limit of concurrency, so put the job on hold
1925 * until some other job finishes. Note that the special jobs
1926 * (.BEGIN, .INTERRUPT and .END) may be run even when the
1927 * limit has been reached (e.g. when maxJobs == 0).
984263bc 1928 */
df64c352
MO
1929 jobFull = TRUE;
1930
1931 DEBUGF(JOB, ("Can only run job locally.\n"));
1932 job->flags |= JOB_RESTART;
9de1d47a 1933 TAILQ_INSERT_TAIL(&stoppedJobs, job, link);
df64c352
MO
1934 } else {
1935 if (nJobs >= maxJobs) {
1936 /*
9de1d47a 1937 * If we're running this job as a special case
df64c352
MO
1938 * (see above), at least say the table is full.
1939 */
1940 jobFull = TRUE;
1941 DEBUGF(JOB, ("Local job queue is full.\n"));
984263bc 1942 }
df64c352
MO
1943 JobExec(job, argv);
1944 }
1945 return (JOB_RUNNING);
1946}
1947
1948static char *
1949JobOutput(Job *job, char *cp, char *endp, int msg)
1950{
1951 char *ecp;
1952
1953 if (commandShell->noPrint) {
4faecc47 1954 ecp = strstr(cp, commandShell->noPrint);
df64c352
MO
1955 while (ecp != NULL) {
1956 if (cp != ecp) {
1957 *ecp = '\0';
1958 if (msg && job->node != lastNode) {
1959 MESSAGE(stdout, job->node);
1960 lastNode = job->node;
1961 }
1962 /*
1963 * The only way there wouldn't be a newline
1964 * after this line is if it were the last in
1965 * the buffer. However, since the non-printable
1966 * comes after it, there must be a newline, so
1967 * we don't print one.
1968 */
1969 fprintf(stdout, "%s", cp);
1970 fflush(stdout);
1971 }
3120aaed 1972 cp = ecp + strlen(commandShell->noPrint);
df64c352
MO
1973 if (cp != endp) {
1974 /*
1975 * Still more to print, look again after
1976 * skipping the whitespace following the
1977 * non-printable command....
1978 */
1979 cp++;
1980 while (*cp == ' ' || *cp == '\t' ||
1981 *cp == '\n') {
1982 cp++;
1983 }
1984 ecp = strstr(cp, commandShell->noPrint);
1985 } else {
1986 return (cp);
1987 }
1988 }
984263bc 1989 }
df64c352 1990 return (cp);
984263bc
MD
1991}
1992
df64c352
MO
1993/**
1994 * JobDoOutput
984263bc
MD
1995 * This function is called at different times depending on
1996 * whether the user has specified that output is to be collected
1997 * via pipes or temporary files. In the former case, we are called
1998 * whenever there is something to read on the pipe. We collect more
1999 * output from the given job and store it in the job's outBuf. If
2000 * this makes up a line, we print it tagged by the job's identifier,
2001 * as necessary.
2002 * If output has been collected in a temporary file, we open the
2003 * file and read it line by line, transfering it to our own
2004 * output channel until the file is empty. At which point we
2005 * remove the temporary file.
2006 * In both cases, however, we keep our figurative eye out for the
2007 * 'noPrint' line for the shell from which the output came. If
2008 * we recognize a line, we don't print it. If the command is not
2009 * alone on the line (the character after it is not \0 or \n), we
2010 * do print whatever follows it.
2011 *
984263bc
MD
2012 * Side Effects:
2013 * curPos may be shifted as may the contents of outBuf.
984263bc 2014 */
9de1d47a 2015static void
84de9e23 2016JobDoOutput(Job *job, Boolean finish)
984263bc 2017{
df64c352
MO
2018 Boolean gotNL = FALSE; /* true if got a newline */
2019 Boolean fbuf; /* true if our buffer filled up */
2020 int nr; /* number of bytes read */
2021 int i; /* auxiliary index into outBuf */
2022 int max; /* limit for i (end of current data) */
2023 int nRead; /* (Temporary) number of bytes read */
2024 FILE *oFILE; /* Stream pointer to shell's output file */
2025 char inLine[132];
984263bc 2026
df64c352 2027 if (usePipes) {
984263bc 2028 /*
df64c352 2029 * Read as many bytes as will fit in the buffer.
984263bc 2030 */
df64c352
MO
2031 end_loop:
2032 gotNL = FALSE;
2033 fbuf = FALSE;
984263bc 2034
df64c352
MO
2035 nRead = read(job->inPipe, &job->outBuf[job->curPos],
2036 JOB_BUFSIZE - job->curPos);
984263bc 2037 /*
df64c352
MO
2038 * Check for interrupt here too, because the above read may
2039 * block when the child process is stopped. In this case the
2040 * interrupt will unblock it (we don't use SA_RESTART).
984263bc 2041 */
df64c352
MO
2042 if (interrupted)
2043 JobPassSig(interrupted);
2044
2045 if (nRead < 0) {
2046 DEBUGF(JOB, ("JobDoOutput(piperead)"));
2047 nr = 0;
2048 } else {
2049 nr = nRead;
2050 }
984263bc
MD
2051
2052 /*
df64c352
MO
2053 * If we hit the end-of-file (the job is dead), we must flush
2054 * its remaining output, so pretend we read a newline if
2055 * there's any output remaining in the buffer.
2056 * Also clear the 'finish' flag so we stop looping.
984263bc 2057 */
9de1d47a 2058 if (nr == 0 && job->curPos != 0) {
df64c352
MO
2059 job->outBuf[job->curPos] = '\n';
2060 nr = 1;
2061 finish = FALSE;
2062 } else if (nr == 0) {
2063 finish = FALSE;
984263bc 2064 }
984263bc 2065
984263bc 2066 /*
df64c352
MO
2067 * Look for the last newline in the bytes we just got. If there
2068 * is one, break out of the loop with 'i' as its index and
2069 * gotNL set TRUE.
2070 */
2071 max = job->curPos + nr;
2072 for (i = job->curPos + nr - 1; i >= job->curPos; i--) {
2073 if (job->outBuf[i] == '\n') {
2074 gotNL = TRUE;
2075 break;
2076 } else if (job->outBuf[i] == '\0') {
2077 /*
2078 * Why?
2079 */
2080 job->outBuf[i] = ' ';
2081 }
2082 }
2083
2084 if (!gotNL) {
2085 job->curPos += nr;
2086 if (job->curPos == JOB_BUFSIZE) {
2087 /*
2088 * If we've run out of buffer space, we have
2089 * no choice but to print the stuff. sigh.
2090 */
2091 fbuf = TRUE;
2092 i = job->curPos;
2093 }
2094 }
2095 if (gotNL || fbuf) {
2096 /*
2097 * Need to send the output to the screen. Null terminate
2098 * it first, overwriting the newline character if there
2099 * was one. So long as the line isn't one we should
2100 * filter (according to the shell description), we print
2101 * the line, preceded by a target banner if this target
2102 * isn't the same as the one for which we last printed
2103 * something. The rest of the data in the buffer are
2104 * then shifted down to the start of the buffer and
2105 * curPos is set accordingly.
2106 */
2107 job->outBuf[i] = '\0';
2108 if (i >= job->curPos) {
2109 char *cp;
2110
2111 cp = JobOutput(job, job->outBuf,
2112 &job->outBuf[i], FALSE);
2113
2114 /*
2115 * There's still more in that buffer. This time,
2116 * though, we know there's no newline at the
2117 * end, so we add one of our own free will.
2118 */
2119 if (*cp != '\0') {
2120 if (job->node != lastNode) {
2121 MESSAGE(stdout, job->node);
2122 lastNode = job->node;
2123 }
2124 fprintf(stdout, "%s%s", cp,
2125 gotNL ? "\n" : "");
2126 fflush(stdout);
2127 }
2128 }
2129 if (i < max - 1) {
2130 /* shift the remaining characters down */
2131 memcpy(job->outBuf, &job->outBuf[i + 1],
2132 max - (i + 1));
2133 job->curPos = max - (i + 1);
2134
2135 } else {
2136 /*
2137 * We have written everything out, so we just
2138 * start over from the start of the buffer.
2139 * No copying. No nothing.
2140 */
2141 job->curPos = 0;
2142 }
2143 }
2144 if (finish) {
2145 /*
2146 * If the finish flag is true, we must loop until we hit
2147 * end-of-file on the pipe. This is guaranteed to happen
2148 * eventually since the other end of the pipe is now
2149 * closed (we closed it explicitly and the child has
2150 * exited). When we do get an EOF, finish will be set
2151 * FALSE and we'll fall through and out.
2152 */
2153 goto end_loop;
984263bc 2154 }
984263bc 2155
df64c352 2156 } else {
984263bc 2157 /*
df64c352
MO
2158 * We've been called to retrieve the output of the job from the
2159 * temporary file where it's been squirreled away. This consists
2160 * of opening the file, reading the output line by line, being
2161 * sure not to print the noPrint line for the shell we used,
2162 * then close and remove the temporary file. Very simple.
2163 *
2164 * Change to read in blocks and do FindSubString type things
2165 * as for pipes? That would allow for "@echo -n..."
984263bc 2166 */
df64c352
MO
2167 oFILE = fopen(job->outFile, "r");
2168 if (oFILE != NULL) {
2169 fprintf(stdout, "Results of making %s:\n",
2170 job->node->name);
2171 fflush(stdout);
2172
2173 while (fgets(inLine, sizeof(inLine), oFILE) != NULL) {
2174 char *cp, *endp, *oendp;
2175
2176 cp = inLine;
2177 oendp = endp = inLine + strlen(inLine);
2178 if (endp[-1] == '\n') {
2179 *--endp = '\0';
2180 }
2181 cp = JobOutput(job, inLine, endp, FALSE);
2182
2183 /*
2184 * There's still more in that buffer. This time,
2185 * though, we know there's no newline at the
2186 * end, so we add one of our own free will.
2187 */
2188 fprintf(stdout, "%s", cp);
2189 fflush(stdout);
2190 if (endp != oendp) {
2191 fprintf(stdout, "\n");
2192 fflush(stdout);
2193 }
2194 }
2195 fclose(oFILE);
2196 eunlink(job->outFile);
984263bc 2197 }
984263bc 2198 }
984263bc
MD
2199}
2200
df64c352
MO
2201/**
2202 * Job_CatchChildren
984263bc
MD
2203 * Handle the exit of a child. Called from Make_Make.
2204 *
984263bc
MD
2205 * Side Effects:
2206 * The job descriptor is removed from the list of children.
2207 *
2208 * Notes:
2209 * We do waits, blocking or not, according to the wisdom of our
2210 * caller, until there are no more children to report. For each
2211 * job, call JobFinish to finish things off. This will take care of
2212 * putting jobs on the stoppedJobs queue.
984263bc
MD
2213 */
2214void
84de9e23 2215Job_CatchChildren(Boolean block)
984263bc 2216{
9de1d47a 2217 pid_t pid; /* pid of dead child */
df64c352 2218 Job *job; /* job descriptor for dead child */
df64c352
MO
2219 int status; /* Exit/termination status */
2220
2221 /*
2222 * Don't even bother if we know there's no one around.
2223 */
2224 if (nJobs == 0) {
2225 return;
2226 }
2227
2228 for (;;) {
2229 pid = waitpid((pid_t)-1, &status,
2230 (block ? 0 : WNOHANG) | WUNTRACED);
2231 if (pid <= 0)
0515f7ac 2232 break;
df64c352 2233
9de1d47a
MO
2234 DEBUGF(JOB, ("Process %jd exited or stopped.\n",
2235 (intmax_t)pid));
df64c352 2236
9de1d47a
MO
2237 TAILQ_FOREACH(job, &jobs, link) {
2238 if (job->pid == pid)
df64c352 2239 break;
0515f7ac 2240 }
df64c352 2241
9de1d47a 2242 if (job == NULL) {
df64c352
MO
2243 if (WIFSIGNALED(status) &&
2244 (WTERMSIG(status) == SIGCONT)) {
9de1d47a
MO
2245 TAILQ_FOREACH(job, &jobs, link) {
2246 if (job->pid == pid)
df64c352
MO
2247 break;
2248 }
9de1d47a
MO
2249 if (job == NULL) {
2250 Error("Resumed child (%jd) "
2251 "not in table", (intmax_t)pid);
df64c352
MO
2252 continue;
2253 }
9de1d47a 2254 TAILQ_REMOVE(&stoppedJobs, job, link);
df64c352 2255 } else {
9de1d47a
MO
2256 Error("Child (%jd) not in table?",
2257 (intmax_t)pid);
df64c352
MO
2258 continue;
2259 }
2260 } else {
9de1d47a 2261 TAILQ_REMOVE(&jobs, job, link);
df64c352
MO
2262 nJobs -= 1;
2263 if (fifoFd >= 0 && maxJobs > 1) {
2264 write(fifoFd, "+", 1);
2265 maxJobs--;
2266 if (nJobs >= maxJobs)
2267 jobFull = TRUE;
2268 else
2269 jobFull = FALSE;
2270 } else {
2271 DEBUGF(JOB, ("Job queue is no longer full.\n"));
2272 jobFull = FALSE;
2273 }
984263bc 2274 }
df64c352
MO
2275
2276 JobFinish(job, &status);
2277 }
2278 if (interrupted)
2279 JobPassSig(interrupted);
984263bc
MD
2280}
2281
df64c352
MO
2282/**
2283 * Job_CatchOutput
984263bc
MD
2284 * Catch the output from our children, if we're using
2285 * pipes do so. Otherwise just block time until we get a
fbfaa208 2286 * signal(most likely a SIGCHLD) since there's no point in
984263bc
MD
2287 * just spinning when there's nothing to do and the reaping
2288 * of a child can wait for a while.
2289 *
984263bc
MD
2290 * Side Effects:
2291 * Output is read from pipes if we're piping.
2292 * -----------------------------------------------------------------------
2293 */
2294void
b24361c9
MO
2295#ifdef USE_KQUEUE
2296Job_CatchOutput(int flag __unused)
2297#else
aa582f64 2298Job_CatchOutput(int flag)
b24361c9 2299#endif
984263bc 2300{
df64c352 2301 int nfds;
218b5aa1
MD
2302#ifdef USE_KQUEUE
2303#define KEV_SIZE 4
df64c352
MO
2304 struct kevent kev[KEV_SIZE];
2305 int i;
218b5aa1 2306#else
df64c352
MO
2307 struct timeval timeout;
2308 fd_set readfds;
df64c352 2309 Job *job;
218b5aa1 2310#endif
984263bc 2311
df64c352 2312 fflush(stdout);
984263bc 2313
df64c352 2314 if (usePipes) {
218b5aa1 2315#ifdef USE_KQUEUE
df64c352
MO
2316 if ((nfds = kevent(kqfd, NULL, 0, kev, KEV_SIZE, NULL)) == -1) {
2317 if (errno != EINTR)
2318 Punt("kevent: %s", strerror(errno));
2319 if (interrupted)
2320 JobPassSig(interrupted);
2321 } else {
2322 for (i = 0; i < nfds; i++) {
2323 if (kev[i].flags & EV_ERROR) {
2324 warnc(kev[i].data, "kevent");
2325 continue;
2326 }
2327 switch (kev[i].filter) {
2328 case EVFILT_READ:
2329 JobDoOutput(kev[i].udata, FALSE);
2330 break;
2331 case EVFILT_PROC:
2332 /*
2333 * Just wake up and let
2334 * Job_CatchChildren() collect the
2335 * terminated job.
2336 */
2337 break;
2338 }
2339 }
218b5aa1 2340 }
218b5aa1 2341#else
df64c352
MO
2342 readfds = outputs;
2343 timeout.tv_sec = SEL_SEC;
2344 timeout.tv_usec = SEL_USEC;
2345 if (flag && jobFull && fifoFd >= 0)
2346 FD_SET(fifoFd, &readfds);
2347
2348 nfds = select(FD_SETSIZE, &readfds, (fd_set *)NULL,
2349 (fd_set *)NULL, &timeout);
2350 if (nfds <= 0) {
2351 if (interrupted)
2352 JobPassSig(interrupted);
2353 return;
2354 }
2355 if (fifoFd >= 0 && FD_ISSET(fifoFd, &readfds)) {
2356 if (--nfds <= 0)
2357 return;
2358 }
9de1d47a
MO
2359 job = TAILQ_FIRST(&jobs);
2360 while (nfds != 0 && job != NULL) {
df64c352
MO
2361 if (FD_ISSET(job->inPipe, &readfds)) {
2362 JobDoOutput(job, FALSE);
9de1d47a 2363 nfds--;
df64c352 2364 }
9de1d47a 2365 job = TAILQ_NEXT(job, link);
df64c352 2366 }
218b5aa1 2367#endif /* !USE_KQUEUE */
df64c352 2368 }
984263bc
MD
2369}
2370
df64c352
MO
2371/**
2372 * Job_Make
984263bc
MD
2373 * Start the creation of a target. Basically a front-end for
2374 * JobStart used by the Make module.
2375 *
984263bc
MD
2376 * Side Effects:
2377 * Another job is started.
984263bc
MD
2378 */
2379void
84de9e23 2380Job_Make(GNode *gn)
984263bc 2381{
fbfaa208 2382
df64c352 2383 JobStart(gn, 0, NULL);
984263bc
MD
2384}
2385
df64c352
MO
2386/**
2387 * JobCopyShell
2388 * Make a new copy of the shell structure including a copy of the strings
2389 * in it. This also defaults some fields in case they are NULL.
899365c2 2390 *
df64c352
MO
2391 * Returns:
2392 * The function returns a pointer to the new shell structure.
899365c2 2393 */
7051be4f
MO
2394static struct Shell *
2395JobCopyShell(const struct Shell *osh)
899365c2 2396{
7051be4f 2397 struct Shell *nsh;
899365c2
MO
2398
2399 nsh = emalloc(sizeof(*nsh));
2400 nsh->name = estrdup(osh->name);
2401
2402 if (osh->echoOff != NULL)
2403 nsh->echoOff = estrdup(osh->echoOff);
2404 else
2405 nsh->echoOff = NULL;
2406 if (osh->echoOn != NULL)
2407 nsh->echoOn = estrdup(osh->echoOn);
2408 else
2409 nsh->echoOn = NULL;
2410 nsh->hasEchoCtl = osh->hasEchoCtl;
2411
2412 if (osh->noPrint != NULL)
2413 nsh->noPrint = estrdup(osh->noPrint);
2414 else
2415 nsh->noPrint = NULL;
899365c2
MO
2416
2417 nsh->hasErrCtl = osh->hasErrCtl;
2418 if (osh->errCheck == NULL)
2419 nsh->errCheck = estrdup("");
2420 else
2421 nsh->errCheck = estrdup(osh->errCheck);
2422 if (osh->ignErr == NULL)
2423 nsh->ignErr = estrdup("%s");
2424 else
2425 nsh->ignErr = estrdup(osh->ignErr);
2426
2427 if (osh->echo == NULL)
2428 nsh->echo = estrdup("");
2429 else
2430 nsh->echo = estrdup(osh->echo);
2431
2432 if (osh->exit == NULL)
2433 nsh->exit = estrdup("");
2434 else
2435 nsh->exit = estrdup(osh->exit);
2436
2437 return (nsh);
2438}
2439
df64c352
MO
2440/**
2441 * JobFreeShell
2442 * Free a shell structure and all associated strings.
899365c2
MO
2443 */
2444static void
7051be4f 2445JobFreeShell(struct Shell *sh)
899365c2
MO
2446{
2447
2448 if (sh != NULL) {
2449 free(sh->name);
2450 free(sh->echoOff);
2451 free(sh->echoOn);
2452 free(sh->noPrint);
2453 free(sh->errCheck);
2454 free(sh->ignErr);
2455 free(sh->echo);
2456 free(sh->exit);
2457 free(sh);
2458 }
2459}
2460
2461void
2462Shell_Init(void)
2463{
2464
df64c352
MO
2465 if (commandShell == NULL)
2466 commandShell = JobMatchShell(shells[DEFSHELL].name);
899365c2 2467
df64c352
MO
2468 if (shellPath == NULL) {
2469 /*
2470 * The user didn't specify a shell to use, so we are using the
2471 * default one... Both the absolute path and the last component
2472 * must be set. The last component is taken from the 'name'
2473 * field of the default shell description pointed-to by
2474 * commandShell. All default shells are located in
2475 * PATH_DEFSHELLDIR.
2476 */
2477 shellName = commandShell->name;
2478 shellPath = str_concat(PATH_DEFSHELLDIR, shellName,
2479 STR_ADDSLASH);
2480 }
899365c2
MO
2481}
2482
df64c352
MO
2483/**
2484 * Job_Init
a34ec481 2485 * Initialize the process module, given a maximum number of jobs.
984263bc 2486 *
984263bc
MD
2487 * Side Effects:
2488 * lists and counters are initialized
984263bc
MD
2489 */
2490void
a34ec481 2491Job_Init(int maxproc)
984263bc 2492{
df64c352
MO
2493 GNode *begin; /* node for commands to do at the very start */
2494 const char *env;
2495 struct sigaction sa;
984263bc 2496
df64c352
MO
2497 fifoFd = -1;
2498 env = getenv("MAKE_JOBS_FIFO");
aa582f64 2499
df64c352
MO
2500 if (env == NULL && maxproc > 1) {
2501 /*
2502 * We did not find the environment variable so we are the
2503 * leader. Create the fifo, open it, write one char per
2504 * allowed job into the pipe.
2505 */
2506 mktemp(fifoName);
2507 if (!mkfifo(fifoName, 0600)) {
2508 fifoFd = open(fifoName, O_RDWR | O_NONBLOCK, 0);
2509 if (fifoFd >= 0) {
2510 fifoMaster = 1;
2511 fcntl(fifoFd, F_SETFL, O_NONBLOCK);
2512 env = fifoName;
2513 setenv("MAKE_JOBS_FIFO", env, 1);
2514 while (maxproc-- > 0) {
2515 write(fifoFd, "+", 1);
2516 }
2517 /* The master make does not get a magic token */
2518 jobFull = TRUE;
2519 maxJobs = 0;
2520 } else {
2521 unlink(fifoName);
2522 env = NULL;
2523 }
aa582f64 2524 }
df64c352
MO
2525
2526 } else if (env != NULL) {
2527 /*
2528 * We had the environment variable so we are a slave.
2529 * Open fifo and give ourselves a magic token which represents
2530 * the token our parent make has grabbed to start his make
2531 * process. Otherwise the sub-makes would gobble up tokens and
2532 * the proper number of tokens to specify to -j would depend
2533 * on the depth of the tree and the order of execution.
2534 */
2535 fifoFd = open(env, O_RDWR, 0);
2536 if (fifoFd >= 0) {
2537 fcntl(fifoFd, F_SETFL, O_NONBLOCK);
2538 maxJobs = 1;
2539 jobFull = FALSE;
2540 }
2541 }
2542 if (fifoFd <= 0) {
2543 maxJobs = maxproc;
2544 jobFull = FALSE;
2545 } else {
2546 }
2547 nJobs = 0;
2548
2549 aborting = 0;
2550 errors = 0;
2551
2552 lastNode = NULL;
2553
2554 if ((maxJobs == 1 && fifoFd < 0) || beVerbose == 0) {
2555 /*
2556 * If only one job can run at a time, there's no need for a
2557 * banner, no is there?
2558 */
2559 targFmt = "";
2560 } else {
2561 targFmt = TARG_FMT;
aa582f64 2562 }
984263bc 2563
df64c352 2564 Shell_Init();
984263bc 2565
df64c352
MO
2566 /*
2567 * Catch the four signals that POSIX specifies if they aren't ignored.
2568 * JobCatchSignal will just set global variables and hope someone
2569 * else is going to handle the interrupt.
2570 */
2571 sa.sa_handler = JobCatchSig;
2572 sigemptyset(&sa.sa_mask);
2573 sa.sa_flags = 0;
984263bc 2574
df64c352
MO
2575 if (signal(SIGINT, SIG_IGN) != SIG_IGN) {
2576 sigaction(SIGINT, &sa, NULL);
2577 }
2578 if (signal(SIGHUP, SIG_IGN) != SIG_IGN) {
2579 sigaction(SIGHUP, &sa, NULL);
2580 }
2581 if (signal(SIGQUIT, SIG_IGN) != SIG_IGN) {
2582 sigaction(SIGQUIT, &sa, NULL);
2583 }
2584 if (signal(SIGTERM, SIG_IGN) != SIG_IGN) {
2585 sigaction(SIGTERM, &sa, NULL);
2586 }
984263bc 2587 /*
df64c352
MO
2588 * There are additional signals that need to be caught and passed if
2589 * either the export system wants to be told directly of signals or if
2590 * we're giving each job its own process group (since then it won't get
2591 * signals from the terminal driver as we own the terminal)
984263bc 2592 */
a34ec481 2593#if defined(USE_PGRP)
df64c352
MO
2594 if (signal(SIGTSTP, SIG_IGN) != SIG_IGN) {
2595 sigaction(SIGTSTP, &sa, NULL);
2596 }
2597 if (signal(SIGTTOU, SIG_IGN) != SIG_IGN) {
2598 sigaction(SIGTTOU, &sa, NULL);
2599 }
2600 if (signal(SIGTTIN, SIG_IGN) != SIG_IGN) {
2601 sigaction(SIGTTIN, &sa, NULL);
2602 }
2603 if (signal(SIGWINCH, SIG_IGN) != SIG_IGN) {
2604 sigaction(SIGWINCH, &sa, NULL);
2605 }
984263bc
MD
2606#endif
2607
218b5aa1 2608#ifdef USE_KQUEUE
df64c352
MO
2609 if ((kqfd = kqueue()) == -1) {
2610 Punt("kqueue: %s", strerror(errno));
2611 }
218b5aa1
MD
2612#endif
2613
df64c352 2614 begin = Targ_FindNode(".BEGIN", TARG_NOCREATE);
984263bc 2615
df64c352
MO
2616 if (begin != NULL) {
2617 JobStart(begin, JOB_SPECIAL, (Job *)NULL);
2618 while (nJobs) {
2619 Job_CatchOutput(0);
2620 Job_CatchChildren(!usePipes);
2621 }
984263bc 2622 }
df64c352 2623 postCommands = Targ_FindNode(".END", TARG_CREATE);
984263bc
MD
2624}
2625
df64c352
MO
2626/**
2627 * Job_Full
984263bc
MD
2628 * See if the job table is full. It is considered full if it is OR
2629 * if we are in the process of aborting OR if we have
2630 * reached/exceeded our local quota. This prevents any more jobs
2631 * from starting up.
2632 *
2633 * Results:
2634 * TRUE if the job table is full, FALSE otherwise
984263bc
MD
2635 */
2636Boolean
84de9e23 2637Job_Full(void)
984263bc 2638{
df64c352
MO
2639 char c;
2640 int i;
2641
2642 if (aborting)
2643 return (aborting);
2644 if (fifoFd >= 0 && jobFull) {
2645 i = read(fifoFd, &c, 1);
2646 if (i > 0) {
2647 maxJobs++;
2648 jobFull = FALSE;
2649 }
2650 }
2651 return (jobFull);
984263bc
MD
2652}
2653
df64c352
MO
2654/**
2655 * Job_Empty
984263bc
MD
2656 * See if the job table is empty. Because the local concurrency may
2657 * be set to 0, it is possible for the job table to become empty,
2658 * while the list of stoppedJobs remains non-empty. In such a case,
2659 * we want to restart as many jobs as we can.
2660 *
2661 * Results:
2662 * TRUE if it is. FALSE if it ain't.
984263bc
MD
2663 */
2664Boolean
84de9e23 2665Job_Empty(void)
984263bc 2666{
df64c352 2667 if (nJobs == 0) {
9de1d47a 2668 if (!TAILQ_EMPTY(&stoppedJobs) && !aborting) {
df64c352
MO
2669 /*
2670 * The job table is obviously not full if it has no
2671 * jobs in it...Try and restart the stopped jobs.
2672 */
2673 jobFull = FALSE;
2674 JobRestartJobs();
2675 return (FALSE);
2676 } else {
2677 return (TRUE);
2678 }
984263bc 2679 } else {
df64c352 2680 return (FALSE);
984263bc 2681 }
984263bc
MD
2682}
2683
df64c352
MO
2684/**
2685 * JobMatchShell
984263bc
MD
2686 * Find a matching shell in 'shells' given its final component.
2687 *
2688 * Results:
a4063c43 2689 * A pointer to a freshly allocated Shell structure with a copy
899365c2
MO
2690 * of the static structure or NULL if no shell with the given name
2691 * is found.
984263bc 2692 */
7051be4f 2693static struct Shell *
899365c2 2694JobMatchShell(const char *name)
984263bc 2695{
df64c352 2696 const struct CShell *sh; /* Pointer into shells table */
7051be4f 2697 struct Shell *nsh;
df64c352
MO
2698
2699 for (sh = shells; sh < shells + __arysize(shells); sh++)
2700 if (strcmp(sh->name, name) == 0)
2701 break;
2702
2703 if (sh == shells + __arysize(shells))
2704 return (NULL);
2705
2706 /* make a copy */
2707 nsh = emalloc(sizeof(*nsh));
2708
2709 nsh->name = estrdup(sh->name);
2710 nsh->echoOff = estrdup(sh->echoOff);
2711 nsh->echoOn = estrdup(sh->echoOn);
2712 nsh->hasEchoCtl = sh->hasEchoCtl;
2713 nsh->noPrint = estrdup(sh->noPrint);
df64c352
MO
2714 nsh->hasErrCtl = sh->hasErrCtl;
2715 nsh->errCheck = estrdup(sh->errCheck);
2716 nsh->ignErr = estrdup(sh->ignErr);
2717 nsh->echo = estrdup(sh->echo);
2718 nsh->exit = estrdup(sh->exit);
2719
2720 return (nsh);
984263bc
MD
2721}
2722
df64c352
MO
2723/**
2724 * Job_ParseShell
984263bc
MD
2725 * Parse a shell specification and set up commandShell, shellPath
2726 * and shellName appropriately.
2727 *
2728 * Results:
2729 * FAILURE if the specification was incorrect.
2730 *
2731 * Side Effects:
2732 * commandShell points to a Shell structure (either predefined or
2733 * created from the shell spec), shellPath is the full path of the
2734 * shell described by commandShell, while shellName is just the
2735 * final component of shellPath.
2736 *
2737 * Notes:
2738 * A shell specification consists of a .SHELL target, with dependency
2739 * operator, followed by a series of blank-separated words. Double
2740 * quotes can be used to use blanks in words. A backslash escapes
2741 * anything (most notably a double-quote and a space) and
2742 * provides the functionality it does in C. Each word consists of
2743 * keyword and value separated by an equal sign. There should be no
2744 * unnecessary spaces in the word. The keywords are as follows:
b04c4147
MO
2745 * name Name of shell.
2746 * path Location of shell. Overrides "name" if given
2747 * quiet Command to turn off echoing.
2748 * echo Command to turn echoing on
984263bc 2749 * filter Result of turning off echoing that shouldn't be
b04c4147 2750 * printed.
984263bc
MD
2751 * echoFlag Flag to turn echoing on at the start
2752 * errFlag Flag to turn error checking on at the start
2753 * hasErrCtl True if shell has error checking control
b04c4147
MO
2754 * check Command to turn on error checking if hasErrCtl
2755 * is TRUE or template of command to echo a command
2756 * for which error checking is off if hasErrCtl is
2757 * FALSE.
984263bc 2758 * ignore Command to turn off error checking if hasErrCtl
b04c4147
MO
2759 * is TRUE or template of command to execute a
2760 * command so as to ignore any errors it returns if
2761 * hasErrCtl is FALSE.
984263bc
MD
2762 */
2763ReturnStatus
84de9e23 2764Job_ParseShell(char *line)
984263bc 2765{
df64c352
MO
2766 char **words;
2767 int wordCount;
2768 char **argv;
2769 int argc;
2770 char *path;
3120aaed 2771 char *eq;
df64c352 2772 Boolean fullSpec = FALSE;
7051be4f
MO
2773 struct Shell newShell;
2774 struct Shell *sh;
df64c352
MO
2775
2776 while (isspace((unsigned char)*line)) {
2777 line++;
2778 }
2779 words = brk_string(line, &wordCount, TRUE);
2780
2781 memset(&newShell, 0, sizeof(newShell));
3120aaed 2782 path = NULL;
df64c352 2783
984263bc 2784 /*
3120aaed
MO
2785 * Parse the specification by keyword but skip the first word - it
2786 * is not set by brk_string.
984263bc 2787 */
3120aaed
MO
2788 wordCount--;
2789 words++;
2790
2791 for (argc = wordCount, argv = words; argc != 0; argc--, argv++) {
2792 /*
2793 * Split keyword and value
2794 */
2795 if ((eq = strchr(*argv, '=')) == NULL) {
2796 Parse_Error(PARSE_FATAL, "missing '=' in shell "
2797 "specification keyword '%s'", *argv);
2798 return (FAILURE);
2799 }
2800 *eq++ = '\0';
2801
2802 if (strcmp(*argv, "path") == 0) {
2803 path = eq;
2804 } else if (strcmp(*argv, "name") == 0) {
2805 newShell.name = eq;
2806 } else if (strcmp(*argv, "quiet") == 0) {
2807 newShell.echoOff = eq;
2808 fullSpec = TRUE;
2809 } else if (strcmp(*argv, "echo") == 0) {
2810 newShell.echoOn = eq;
2811 fullSpec = TRUE;
2812 } else if (strcmp(*argv, "filter") == 0) {
2813 newShell.noPrint = eq;
2814 fullSpec = TRUE;
2815 } else if (strcmp(*argv, "echoFlag") == 0) {
2816 newShell.echo = eq;
2817 fullSpec = TRUE;
2818 } else if (strcmp(*argv, "errFlag") == 0) {
2819 newShell.exit = eq;
df64c352 2820 fullSpec = TRUE;
3120aaed
MO
2821 } else if (strcmp(*argv, "hasErrCtl") == 0) {
2822 newShell.hasErrCtl = (*eq == 'Y' || *eq == 'y' ||
2823 *eq == 'T' || *eq == 't');
2824 fullSpec = TRUE;
2825 } else if (strcmp(*argv, "check") == 0) {
2826 newShell.errCheck = eq;
2827 fullSpec = TRUE;
2828 } else if (strcmp(*argv, "ignore") == 0) {
2829 newShell.ignErr = eq;
2830 fullSpec = TRUE;
2831 } else {
2832 Parse_Error(PARSE_FATAL, "unknown keyword in shell "
2833 "specification '%s'", *argv);
2834 return (FAILURE);
df64c352 2835 }
899365c2
MO
2836 }
2837
984263bc 2838 /*
df64c352 2839 * Some checks (could be more)
984263bc 2840 */
df64c352
MO
2841 if (fullSpec) {
2842 if ((newShell.echoOn != NULL) ^ (newShell.echoOff != NULL))
2843 Parse_Error(PARSE_FATAL, "Shell must have either both "
2844 "echoOff and echoOn or none of them");
2845
2846 if (newShell.echoOn != NULL && newShell.echoOff)
2847 newShell.hasEchoCtl = TRUE;
2848 }
2849
2850 if (path == NULL) {
2851 /*
2852 * If no path was given, the user wants one of the pre-defined
2853 * shells, yes? So we find the one s/he wants with the help of
2854 * JobMatchShell and set things up the right way. shellPath
2855 * will be set up by Job_Init.
2856 */
2857 if (newShell.name == NULL) {
2858 Parse_Error(PARSE_FATAL,
2859 "Neither path nor name specified");
2860 return (FAILURE);
2861 }
2862 if ((sh = JobMatchShell(newShell.name)) == NULL) {
2863 Parse_Error(PARSE_FATAL, "%s: no matching shell",
2864 newShell.name);
2865 return (FAILURE);
2866 }
2867
984263bc 2868 } else {
df64c352
MO
2869 /*
2870 * The user provided a path. If s/he gave nothing else
2871 * (fullSpec is FALSE), try and find a matching shell in the
2872 * ones we know of. Else we just take the specification at its
2873 * word and copy it to a new location. In either case, we need
2874 * to record the path the user gave for the shell.
2875 */
2876 free(shellPath);
2877 shellPath = estrdup(path);
2878 if (newShell.name == NULL) {
2879 /* get the base name as the name */
2880 path = strrchr(path, '/');
2881 if (path == NULL) {
2882 path = shellPath;
2883 } else {
2884 path += 1;
2885 }
2886 newShell.name = path;
2887 }
2888
2889 if (!fullSpec) {
2890 if ((sh = JobMatchShell(newShell.name)) == NULL) {
2891 Parse_Error(PARSE_FATAL,
2892 "%s: no matching shell", newShell.name);
2893 return (FAILURE);
2894 }
2895 } else {
2896 sh = JobCopyShell(&newShell);
2897 }
984263bc 2898 }
984263bc 2899
df64c352
MO
2900 /* set the new shell */
2901 JobFreeShell(commandShell);
2902 commandShell = sh;
984263bc 2903
df64c352 2904 shellName = commandShell->name;
899365c2 2905
df64c352 2906 return (SUCCESS);
984263bc
MD
2907}
2908
df64c352
MO
2909/**
2910 * JobInterrupt
984263bc
MD
2911 * Handle the receipt of an interrupt.
2912 *
984263bc
MD
2913 * Side Effects:
2914 * All children are killed. Another job will be started if the
2915 * .INTERRUPT target was given.
984263bc
MD
2916 */
2917static void
84de9e23 2918JobInterrupt(int runINTERRUPT, int signo)
984263bc 2919{
df64c352
MO
2920 Job *job; /* job descriptor in that element */
2921 GNode *interrupt; /* the node describing the .INTERRUPT target */
984263bc 2922
df64c352 2923 aborting = ABORT_INTERRUPT;
984263bc 2924
9de1d47a 2925 TAILQ_FOREACH(job, &jobs, link) {
df64c352
MO
2926 if (!Targ_Precious(job->node)) {
2927 char *file = (job->node->path == NULL ?
2928 job->node->name : job->node->path);
2929
2930 if (!noExecute && eunlink(file) != -1) {
2931 Error("*** %s removed", file);
2932 }
2933 }
2934 if (job->pid) {
2935 DEBUGF(JOB, ("JobInterrupt passing signal to child "
9de1d47a 2936 "%jd.\n", (intmax_t)job->pid));
df64c352
MO
2937 KILL(job->pid, signo);
2938 }
984263bc 2939 }
984263bc 2940
df64c352
MO
2941 if (runINTERRUPT && !touchFlag) {
2942 /*
2943 * clear the interrupted flag because we would get an
2944 * infinite loop otherwise.
2945 */
2946 interrupted = 0;
89a1b397 2947
df64c352
MO
2948 interrupt = Targ_FindNode(".INTERRUPT", TARG_NOCREATE);
2949 if (interrupt != NULL) {
2950 ignoreErrors = FALSE;
984263bc 2951
df64c352
MO
2952 JobStart(interrupt, JOB_IGNDOTS, (Job *)NULL);
2953 while (nJobs) {
2954 Job_CatchOutput(0);
2955 Job_CatchChildren(!usePipes);
2956 }
2957 }
984263bc 2958 }
984263bc
MD
2959}
2960
df64c352
MO
2961/**
2962 * Job_Finish
984263bc
MD
2963 * Do final processing such as the running of the commands
2964 * attached to the .END target.
2965 *
2966 * Results:
2967 * Number of errors reported.
984263bc
MD
2968 */
2969int
84de9e23 2970Job_Finish(void)
984263bc 2971{
fbfaa208 2972
df64c352
MO
2973 if (postCommands != NULL && !Lst_IsEmpty(&postCommands->commands)) {
2974 if (errors) {
2975 Error("Errors reported so .END ignored");
2976 } else {
2977 JobStart(postCommands, JOB_SPECIAL | JOB_IGNDOTS, NULL);
984263bc 2978
df64c352
MO
2979 while (nJobs) {
2980 Job_CatchOutput(0);
2981 Job_CatchChildren(!usePipes);
2982 }
2983 }
984263bc 2984 }
df64c352
MO
2985 if (fifoFd >= 0) {
2986 close(fifoFd);
2987 fifoFd = -1;
2988 if (fifoMaster)
2989 unlink(fifoName);
2990 }
2991 return (errors);
984263bc
MD
2992}
2993
df64c352
MO
2994/**
2995 * Job_Wait
984263bc
MD
2996 * Waits for all running jobs to finish and returns. Sets 'aborting'
2997 * to ABORT_WAIT to prevent other jobs from starting.
2998 *
984263bc
MD
2999 * Side Effects:
3000 * Currently running jobs finish.
984263bc
MD
3001 */
3002void
84de9e23 3003Job_Wait(void)
984263bc 3004{
fbfaa208 3005
df64c352
MO
3006 aborting = ABORT_WAIT;
3007 while (nJobs != 0) {
3008 Job_CatchOutput(0);
3009 Job_CatchChildren(!usePipes);
3010 }
3011 aborting = 0;
984263bc
MD
3012}
3013
df64c352
MO
3014/**
3015 * Job_AbortAll
984263bc
MD
3016 * Abort all currently running jobs without handling output or anything.
3017 * This function is to be called only in the event of a major
3018 * error. Most definitely NOT to be called from JobInterrupt.
3019 *
984263bc
MD
3020 * Side Effects:
3021 * All children are killed, not just the firstborn
984263bc
MD
3022 */
3023void
84de9e23 3024Job_AbortAll(void)
984263bc 3025{
df64c352
MO
3026 Job *job; /* the job descriptor in that element */
3027 int foo;
984263bc 3028
df64c352 3029 aborting = ABORT_ERROR;
984263bc 3030
df64c352 3031 if (nJobs) {
9de1d47a 3032 TAILQ_FOREACH(job, &jobs, link) {
df64c352
MO
3033 /*
3034 * kill the child process with increasingly drastic
3035 * signals to make darn sure it's dead.
3036 */
3037 KILL(job->pid, SIGINT);
3038 KILL(job->pid, SIGKILL);
3039 }
3040 }
3041
3042 /*
3043 * Catch as many children as want to report in at first, then give up
3044 */
3045 while (waitpid((pid_t)-1, &foo, WNOHANG) > 0)
9de1d47a 3046 ;
984263bc
MD
3047}
3048
df64c352
MO
3049/**
3050 * JobRestartJobs
984263bc
MD
3051 * Tries to restart stopped jobs if there are slots available.
3052 * Note that this tries to restart them regardless of pending errors.
3053 * It's not good to leave stopped jobs lying around!
3054 *
984263bc
MD
3055 * Side Effects:
3056 * Resumes(and possibly migrates) jobs.
984263bc
MD
3057 */
3058static void
84de9e23 3059JobRestartJobs(void)
984263bc 3060{
9de1d47a
MO
3061 Job *job;
3062
3063 while (!jobFull && (job = TAILQ_FIRST(&stoppedJobs)) != NULL) {
df64c352
MO
3064 DEBUGF(JOB, ("Job queue is not full. "
3065 "Restarting a stopped job.\n"));
9de1d47a
MO
3066 TAILQ_REMOVE(&stoppedJobs, job, link);
3067 JobRestart(job);
df64c352 3068 }
984263bc 3069}
69572075
MO
3070
3071/**
3072 * Cmd_Exec
3073 * Execute the command in cmd, and return the output of that command
3074 * in a string.
3075 *
3076 * Results:
3077 * A string containing the output of the command, or the empty string
3078 * If error is not NULL, it contains the reason for the command failure
b582d309
MO
3079 * Any output sent to stderr in the child process is passed to stderr,
3080 * and not captured in the string.
69572075
MO
3081 *
3082 * Side Effects:
3083 * The string must be freed by the caller.
3084 */
3085Buffer *
3086Cmd_Exec(const char *cmd, const char **error)
3087{
3088 int fds[2]; /* Pipe streams */
69572075
MO
3089 int status; /* command exit status */
3090 Buffer *buf; /* buffer to store the result */
3091 ssize_t rcnt;
8a538fd1 3092 ProcStuff ps;
69572075
MO
3093
3094 *error = NULL;
3095 buf = Buf_Init(0);
3096
3097 if (shellPath == NULL)
3098 Shell_Init();
3099 /*
3100 * Open a pipe for fetching its output
3101 */
3102 if (pipe(fds) == -1) {
3103 *error = "Couldn't create pipe for \"%s\"";
3104 return (buf);
3105 }
3106
69e43d67
MO
3107 /* Set close-on-exec on read side of pipe. */
3108 fcntl(fds[0], F_SETFD, fcntl(fds[0], F_GETFD) | FD_CLOEXEC);
3109
3e10c271
MO
3110 ps.in = STDIN_FILENO;
3111 ps.out = fds[1];
3112 ps.err = STDERR_FILENO;
3113
3114 ps.merge_errors = 0;
3115 ps.pgroup = 0;
3116 ps.searchpath = 0;
3117
3118 /* Set up arguments for shell */
7c2a9959
MO
3119 ps.argv = emalloc(4 * sizeof(char *));
3120 ps.argv[0] = strdup(shellName);
3121 ps.argv[1] = strdup("-c");
3122 ps.argv[2] = strdup(cmd);
3123 ps.argv[3] = NULL;
3e10c271 3124
69572075 3125 /*
7c2a9959
MO
3126 * Fork. Warning since we are doing vfork() instead of fork(),
3127 * do not allocate memory in the child process!
69572075 3128 */
ebf8e7fe 3129 if ((ps.child_pid = vfork()) == -1) {
53a3ba77 3130 *error = "Couldn't exec \"%s\"";
53a3ba77 3131
ebf8e7fe 3132 } else if (ps.child_pid == 0) {
69572075 3133 /*
3e10c271 3134 * Child
69572075 3135 */
8a538fd1 3136 ProcExec(&ps);
257e9734 3137 /* NOTREACHED */
69572075 3138
53a3ba77 3139 } else {
7c2a9959
MO
3140 free(ps.argv[2]);
3141 free(ps.argv[1]);
3142 free(ps.argv[0]);
3143 free(ps.argv);
3144
69e43d67 3145 close(fds[1]); /* No need for the writing half of the pipe. */
69572075
MO
3146
3147 do {
3148 char result[BUFSIZ];
3149
3150 rcnt = read(fds[0], result, sizeof(result));
3151 if (rcnt != -1)
3152 Buf_AddBytes(buf, (size_t)rcnt, (Byte *)result);
3153 } while (rcnt > 0 || (rcnt == -1 && errno == EINTR));
3154
3155 if (rcnt == -1)
3156 *error = "Error reading shell's output for \"%s\"";
3157
3158 /*
3159 * Close the input side of the pipe.
3160 */
3161 close(fds[0]);
3162
ebf8e7fe 3163 status = ProcWait(&ps);
69572075
MO
3164 if (status)
3165 *error = "\"%s\" returned non-zero status";
3166
3167 Buf_StripNewlines(buf);
3168
69572075 3169 }
30bb92cf 3170 return (buf);
69572075
MO
3171}
3172
5f530f85
MO
3173static void
3174CompatInit(void)
3175{
3176 const char *cp; /* Pointer to string of shell meta-characters */
3177
3178 for (cp = "#=|^(){};&<>*?[]:$`\\\n"; *cp != '\0'; cp++) {
3179 meta[(unsigned char)*cp] = 1;
3180 }
3181 /*
3182 * The null character serves as a sentinel in the string.
3183 */
3184 meta[0] = 1;
3185}
3186
3187/*
3188 * Interrupt handler - set flag and defer handling to the main code
3189 */
3190static void
3191CompatCatchSig(int signo)
3192{
3193
3194 interrupted = signo;
3195}
3196
3197/*-
3198 *-----------------------------------------------------------------------
3199 * CompatInterrupt --
3200 * Interrupt the creation of the current target and remove it if
3201 * it ain't precious.
3202 *
3203 * Results:
3204 * None.
3205 *
3206 * Side Effects:
3207 * The target is removed and the process exits. If .INTERRUPT exists,
3208 * its commands are run first WITH INTERRUPTS IGNORED..
3209 *
3210 *-----------------------------------------------------------------------
3211 */
3212static void
3213CompatInterrupt(int signo)
3214{
3215 GNode *gn;
3216 sigset_t nmask, omask;
3217 LstNode *ln;
3218
3219 sigemptyset(&nmask);
3220 sigaddset(&nmask, SIGINT);
3221 sigaddset(&nmask, SIGTERM);
3222 sigaddset(&nmask, SIGHUP);
3223 sigaddset(&nmask, SIGQUIT);
3224 sigprocmask(SIG_SETMASK, &nmask, &omask);
3225
3226 /* prevent recursion in evaluation of .INTERRUPT */
3227 interrupted = 0;
3228
3229 if (curTarg != NULL && !Targ_Precious(curTarg)) {
3230 char *p1;
b04c4147 3231 char *file = Var_Value(TARGET, curTarg, &p1);
5f530f85
MO
3232
3233 if (!noExecute && eunlink(file) != -1) {
3234 printf("*** %s removed\n", file);
3235 }
3236 free(p1);
3237 }
3238
3239 /*
3240 * Run .INTERRUPT only if hit with interrupt signal
3241 */
3242 if (signo == SIGINT) {
3243 gn = Targ_FindNode(".INTERRUPT", TARG_NOCREATE);
3244 if (gn != NULL) {
3245 LST_FOREACH(ln, &gn->commands) {
3246 if (Compat_RunCommand(Lst_Datum(ln), gn))
3247 break;
3248 }
3249 }
3250 }
3251
3252 sigprocmask(SIG_SETMASK, &omask, NULL);
3253
3254 if (signo == SIGQUIT)
3255 exit(signo);
3256 signal(signo, SIG_DFL);
3257 kill(getpid(), signo);
3258}
3259
5f530f85
MO
3260/*-
3261 *-----------------------------------------------------------------------
3262 * Compat_RunCommand --
3263 * Execute the next command for a target. If the command returns an
3264 * error, the node's made field is set to ERROR and creation stops.
3265 * The node from which the command came is also given.
3266 *
3267 * Results:
3268 * 0 if the command succeeded, 1 if an error occurred.
3269 *
3270 * Side Effects:
3271 * The node's 'made' field may be set to ERROR.
3272 *
3273 *-----------------------------------------------------------------------
3274 */
53e478a3 3275static int
5f530f85
MO
3276Compat_RunCommand(char *cmd, GNode *gn)
3277{
3278 char *cmdStart; /* Start of expanded command */
3279 char *cp;
3280 Boolean silent; /* Don't print command */
3281 Boolean doit; /* Execute even in -n */
3282 Boolean errCheck; /* Check errors */
3283 int reason; /* Reason for child's death */
3284 int status; /* Description of child's death */
5f530f85
MO
3285 LstNode *cmdNode; /* Node where current command is located */
3286 char **av; /* Argument vector for thing to exec */
3287 char *cmd_save; /* saved cmd */
8a538fd1 3288 ProcStuff ps;
5f530f85 3289
5f530f85
MO
3290 silent = gn->type & OP_SILENT;
3291 errCheck = !(gn->type & OP_IGNORE);
3292 doit = FALSE;
3293
3294 cmdNode = Lst_Member(&gn->commands, cmd);
3295 cmdStart = Buf_Peel(Var_Subst(cmd, gn, FALSE));
3296
3297 /*
3298 * brk_string will return an argv with a NULL in av[0], thus causing
30bb92cf
MO
3299 * execvp() to choke and die horribly. Besides, how can we execute a
3300 * null command? In any case, we warn the user that the command
3301 * expanded to nothing (is this the right thing to do?).
5f530f85
MO
3302 */
3303 if (*cmdStart == '\0') {
3304 free(cmdStart);
3305 Error("%s expands to empty string", cmd);
3306 return (0);
3307 } else {
3308 cmd = cmdStart;
3309 }
3310 Lst_Replace(cmdNode, cmdStart);
3311
3312 if ((gn->type & OP_SAVE_CMDS) && (gn != ENDNode)) {
3313 Lst_AtEnd(&ENDNode->commands, cmdStart);
3314 return (0);
3315 } else if (strcmp(cmdStart, "...") == 0) {
3316 gn->type |= OP_SAVE_CMDS;
3317 return (0);
3318 }
3319
3320 while (*cmd == '@' || *cmd == '-' || *cmd == '+') {
3321 switch (*cmd) {
3322
3323 case '@':
3324 silent = DEBUG(LOUD) ? FALSE : TRUE;
3325 break;
3326
3327 case '-':
3328 errCheck = FALSE;
3329 break;
3330
3331 case '+':
3332 doit = TRUE;
3333 if (!meta[0]) /* we came here from jobs */
3334 CompatInit();
3335 break;
3336 }
3337 cmd++;
3338 }
3339
3340 while (isspace((unsigned char)*cmd))
3341 cmd++;
3342
5f530f85
MO
3343 /*
3344 * Print the command before echoing if we're not supposed to be quiet
3345 * for this one. We also print the command if -n given, but not if '+'.
3346 */
3347 if (!silent || (noExecute && !doit)) {
3348 printf("%s\n", cmd);
3349 fflush(stdout);
3350 }
3351
3352 /*
3353 * If we're not supposed to execute any commands, this is as far as
3354 * we go...
3355 */
3356 if (!doit && noExecute) {
3357 return (0);
3358 }
3359
3e10c271
MO
3360 /*
3361 * Search for meta characters in the command. If there are no meta
3362 * characters, there's no need to execute a shell to execute the
3363 * command.
3364 */
3365 for (cp = cmd; !meta[(unsigned char)*cp]; cp++)
3366 continue;
3367
5f530f85
MO
3368 if (*cp != '\0') {
3369 /*
3370 * If *cp isn't the null character, we hit a "meta" character
47d26f55 3371 * and need to pass the command off to the shell.
5f530f85 3372 */
7c2a9959 3373 av = NULL;
5f530f85
MO
3374
3375 } else {
47d26f55
MO
3376 const char **p;
3377 const char *sh_builtin[] = {
3378 "alias", "cd", "eval", "exec",
3379 "exit", "read", "set", "ulimit",
3380 "unalias", "umask", "unset", "wait",
3381 ":", NULL
3382 };
3383
5f530f85 3384 /*
47d26f55
MO
3385 * Break the command into words to form an argument
3386 * vector we can execute. brk_string sticks our name
3387 * in av[0], so we have to skip over it...
5f530f85
MO
3388 */
3389 av = brk_string(cmd, NULL, TRUE);
3390 av += 1;
47d26f55
MO
3391
3392 for (p = sh_builtin; *p != 0; p++) {
3393 if (strcmp(av[0], *p) == 0) {
3394 /*
3395 * This command must be passed by the shell
3396 * for other reasons.. or.. possibly not at
3397 * all.
3398 */
3399 av = NULL;
3400 break;
3401 }
3402 }
5f530f85
MO
3403 }
3404
3e10c271
MO
3405 ps.in = STDIN_FILENO;
3406 ps.out = STDOUT_FILENO;
3407 ps.err = STDERR_FILENO;
3408
3409 ps.merge_errors = 0;
3410 ps.pgroup = 0;
3411 ps.searchpath = 1;
3412
7c2a9959 3413 if (av == NULL) {
47d26f55
MO
3414 /*
3415 * We give the shell the -e flag as well as -c if it's
3416 * supposed to exit when it hits an error.
3417 */
7c2a9959
MO
3418 ps.argv = emalloc(4 * sizeof(char *));
3419 ps.argv[0] = strdup(shellName);
3420 ps.argv[1] = strdup(errCheck ? "-ec" : "-c");
3421 ps.argv[2] = strdup(cmd);
3422 ps.argv[3] = NULL;
3423 } else {
3424 ps.argv = av;
3425 }
3e10c271 3426
5f530f85
MO
3427 /*
3428 * Fork and execute the single command. If the fork fails, we abort.
7c2a9959
MO
3429 * Warning since we are doing vfork() instead of fork(),
3430 * do not allocate memory in the child process!
5f530f85 3431 */
ebf8e7fe 3432 if ((ps.child_pid = vfork()) == -1) {
5f530f85 3433 Fatal("Could not fork");
53a3ba77 3434
ebf8e7fe 3435 } else if (ps.child_pid == 0) {
3e10c271
MO
3436 /*
3437 * Child
3438 */
8a538fd1 3439 ProcExec(&ps);
30bb92cf
MO
3440 /* NOTREACHED */
3441
53a3ba77 3442 } else {
7c2a9959
MO
3443 if (av == NULL) {
3444 free(ps.argv[2]);
3445 free(ps.argv[1]);
3446 free(ps.argv[0]);
3447 free(ps.argv);
3448 }
3449
53a3ba77
MO
3450 /*
3451 * we need to print out the command associated with this
3452 * Gnode in Targ_PrintCmd from Targ_PrintGraph when debugging
3453 * at level g2, in main(), Fatal() and DieHorribly(),
3454 * therefore do not free it when debugging.
3455 */
3456 if (!DEBUG(GRAPH2)) {
3457 free(cmdStart);
3458 Lst_Replace(cmdNode, cmd_save);
5f530f85 3459 }
69e43d67 3460
53a3ba77
MO
3461 /*
3462 * The child is off and running. Now all we can do is wait...
3463 */
6319dcf0 3464 reason = ProcWait(&ps);
29004ef5 3465
6319dcf0
MO
3466 if (interrupted)
3467 CompatInterrupt(interrupted);
5f530f85 3468
29004ef5
MO
3469 /*
3470 * Deocde and report the reason child exited, then
3471 * indicate how we handled it.
3472 */
6319dcf0 3473 if (WIFEXITED(reason)) {
6319dcf0
MO
3474 status = WEXITSTATUS(reason);
3475 if (status == 0) {
3476 return (0);
53a3ba77 3477 } else {
6319dcf0 3478 printf("*** Error code %d", status);
5f530f85 3479 }
6319dcf0
MO
3480 } else if (WIFSTOPPED(reason)) {
3481 status = WSTOPSIG(reason);
3482 } else {
3483 status = WTERMSIG(reason);
3484 printf("*** Signal %d", status);
5f530f85 3485 }
5f530f85 3486
6319dcf0
MO
3487 if (errCheck) {
3488 gn->made = ERROR;
3489 if (keepgoing) {
3490 /*
3491 * Abort the current
3492 * target, but let
3493 * others continue.
3494 */
3495 printf(" (continuing)\n");
3496 }
3497 return (status);
3498 } else {
3499 /*
3500 * Continue executing
3501 * commands for this target.
3502 * If we return 0, this will
3503 * happen...
3504 */
3505 printf(" (ignored)\n");
3506 return (0);
3507 }
53a3ba77 3508 }
5f530f85
MO
3509}
3510
3511/*-
3512 *-----------------------------------------------------------------------
3513 * CompatMake --
3514 * Make a target, given the parent, to abort if necessary.
3515 *
3516 * Side Effects:
3517 * If an error is detected and not being ignored, the process exits.
3518 *
3519 *-----------------------------------------------------------------------
3520 */
3521static int
3522CompatMake(GNode *gn, GNode *pgn)
3523{
3524 LstNode *ln;
3525
3526 if (gn->type & OP_USE) {
3527 Make_HandleUse(gn, pgn);
3528
3529 } else if (gn->made == UNMADE) {
3530 /*
3531 * First mark ourselves to be made, then apply whatever
3532 * transformations the suffix module thinks are necessary.
3533 * Once that's done, we can descend and make all our children.
3534 * If any of them has an error but the -k flag was given, our
3535 * 'make' field will be set FALSE again. This is our signal to
3536 * not attempt to do anything but abort our parent as well.
3537 */
3538 gn->make = TRUE;
3539 gn->made = BEINGMADE;
3540 Suff_FindDeps(gn);
3541 LST_FOREACH(ln, &gn->children)
3542 CompatMake(Lst_Datum(ln), gn);
3543 if (!gn->make) {
3544 gn->made = ABORTED;
3545 pgn->make = FALSE;
3546 return (0);
3547 }
3548
3549 if (Lst_Member(&gn->iParents, pgn) != NULL) {
3550 char *p1;
3551 Var_Set(IMPSRC, Var_Value(TARGET, gn, &p1), pgn);
3552 free(p1);
3553 }
3554
3555 /*
3556 * All the children were made ok. Now cmtime contains the
3557 * modification time of the newest child, we need to find out
3558 * if we exist and when we were modified last. The criteria for
3559 * datedness are defined by the Make_OODate function.
3560 */
3561 DEBUGF(MAKE, ("Examining %s...", gn->name));
3562 if (!Make_OODate(gn)) {
3563 gn->made = UPTODATE;
3564 DEBUGF(MAKE, ("up-to-date.\n"));
3565 return (0);
3566 } else {
3567 DEBUGF(MAKE, ("out-of-date.\n"));
3568 }
3569
3570 /*
3571 * If the user is just seeing if something is out-of-date,
3572 * exit now to tell him/her "yes".
3573 */
3574 if (queryFlag) {
3575 exit(1);
3576 }
3577
3578 /*
3579 * We need to be re-made. We also have to make sure we've got
3580 * a $? variable. To be nice, we also define the $> variable
3581 * using Make_DoAllVar().
3582 */
3583 Make_DoAllVar(gn);
3584
3585 /*
3586 * Alter our type to tell if errors should be ignored or things
3587 * should not be printed so Compat_RunCommand knows what to do.
3588 */
3589 if (Targ_Ignore(gn)) {
3590 gn->type |= OP_IGNORE;
3591 }
3592 if (Targ_Silent(gn)) {
3593 gn->type |= OP_SILENT;
3594 }
3595
3596 if (Job_CheckCommands(gn, Fatal)) {
3597 /*
3598 * Our commands are ok, but we still have to worry
3599 * about the -t flag...
3600 */
3601 if (!touchFlag) {
3602 curTarg = gn;
3603 LST_FOREACH(ln, &gn->commands) {
3604 if (Compat_RunCommand(Lst_Datum(ln),
3605 gn))
3606 break;
3607 }
3608 curTarg = NULL;
3609 } else {
3610 Job_Touch(gn, gn->type & OP_SILENT);
3611 }
3612 } else {
3613 gn->made = ERROR;
3614 }
3615
3616 if (gn->made != ERROR) {
3617 /*
3618 * If the node was made successfully, mark it so, update
3619 * its modification time and timestamp all its parents.
3620 * Note that for .ZEROTIME targets, the timestamping
3621 * isn't done. This is to keep its state from affecting
3622 * that of its parent.
3623 */
3624 gn->made = MADE;
3625#ifndef RECHECK
3626 /*
3627 * We can't re-stat the thing, but we can at least take
3628 * care of rules where a target depends on a source that
3629 * actually creates the target, but only if it has
3630 * changed, e.g.
3631 *
3632 * parse.h : parse.o
3633 *
3634 * parse.o : parse.y
b04c4147
MO
3635 * yacc -d parse.y
3636 * cc -c y.tab.c
3637 * mv y.tab.o parse.o
3638 * cmp -s y.tab.h parse.h || mv y.tab.h parse.h
5f530f85
MO
3639 *
3640 * In this case, if the definitions produced by yacc
3641 * haven't changed from before, parse.h won't have been
3642 * updated and gn->mtime will reflect the current
3643 * modification time for parse.h. This is something of a
3644 * kludge, I admit, but it's a useful one..
3645 *
3646 * XXX: People like to use a rule like
3647 *
3648 * FRC:
3649 *
3650 * To force things that depend on FRC to be made, so we
3651 * have to check for gn->children being empty as well...
3652 */
3653 if (!Lst_IsEmpty(&gn->commands) ||
3654 Lst_IsEmpty(&gn->children)) {
3655 gn->mtime = now;
3656 }
3657#else
3658 /*
3659 * This is what Make does and it's actually a good
3660 * thing, as it allows rules like
3661 *
3662 * cmp -s y.tab.h parse.h || cp y.tab.h parse.h
3663 *
3664 * to function as intended. Unfortunately, thanks to
3665 * the stateless nature of NFS (and the speed of this
3666 * program), there are times when the modification time
3667 * of a file created on a remote machine will not be
3668 * modified before the stat() implied by the Dir_MTime
3669 * occurs, thus leading us to believe that the file
3670 * is unchanged, wreaking havoc with files that depend
3671 * on this one.
3672 *
3673 * I have decided it is better to make too much than to
3674 * make too little, so this stuff is commented out
3675 * unless you're sure it's ok.
3676 * -- ardeb 1/12/88
3677 */
3678 if (noExecute || Dir_MTime(gn) == 0) {
3679 gn->mtime = now;
3680 }
3681 if (gn->cmtime > gn->mtime)
3682 gn->mtime = gn->cmtime;
3683 DEBUGF(MAKE, ("update time: %s\n",
3684 Targ_FmtTime(gn->mtime)));
3685#endif
3686 if (!(gn->type & OP_EXEC)) {
3687 pgn->childMade = TRUE;
3688 Make_TimeStamp(pgn, gn);
3689 }
3690
3691 } else if (keepgoing) {
3692 pgn->make = FALSE;
3693
3694 } else {
3695 char *p1;
3696
3697 printf("\n\nStop in %s.\n",
3698 Var_Value(".CURDIR", gn, &p1));
3699 free(p1);
3700 exit(1);
3701 }
3702 } else if (gn->made == ERROR) {
3703 /*
3704 * Already had an error when making this beastie. Tell the
3705 * parent to abort.
3706 */
3707 pgn->make = FALSE;
3708 } else {
3709 if (Lst_Member(&gn->iParents, pgn) != NULL) {
3710 char *p1;
3711 Var_Set(IMPSRC, Var_Value(TARGET, gn, &p1), pgn);
3712 free(p1);
3713 }
3714 switch(gn->made) {
3715 case BEINGMADE:
3716 Error("Graph cycles through %s\n", gn->name);
3717 gn->made = ERROR;
3718 pgn->make = FALSE;
3719 break;
3720 case MADE:
3721 if ((gn->type & OP_EXEC) == 0) {
3722 pgn->childMade = TRUE;
3723 Make_TimeStamp(pgn, gn);
3724 }
3725 break;
3726 case UPTODATE:
3727 if ((gn->type & OP_EXEC) == 0) {
3728 Make_TimeStamp(pgn, gn);
3729 }
3730 break;
3731 default:
3732 break;
3733 }
3734 }
3735
3736 return (0);
3737}
3738
3739/*-
3740 *------------------------------------------------------