Annotation of src/usr.bin/make/job.c, Revision 1.72
1.40 espie 1: /* $OpenPackages$ */
1.72 ! espie 2: /* $OpenBSD: job.c,v 1.71 2007/09/17 10:28:48 espie Exp $ */
1.6 millert 3: /* $NetBSD: job.c,v 1.16 1996/11/06 17:59:08 christos Exp $ */
1.1 deraadt 4:
5: /*
6: * Copyright (c) 1988, 1989, 1990 The Regents of the University of California.
7: * Copyright (c) 1988, 1989 by Adam de Boor
8: * Copyright (c) 1989 by Berkeley Softworks
9: * All rights reserved.
10: *
11: * This code is derived from software contributed to Berkeley by
12: * Adam de Boor.
13: *
14: * Redistribution and use in source and binary forms, with or without
15: * modification, are permitted provided that the following conditions
16: * are met:
17: * 1. Redistributions of source code must retain the above copyright
18: * notice, this list of conditions and the following disclaimer.
19: * 2. Redistributions in binary form must reproduce the above copyright
20: * notice, this list of conditions and the following disclaimer in the
21: * documentation and/or other materials provided with the distribution.
1.55 millert 22: * 3. Neither the name of the University nor the names of its contributors
1.1 deraadt 23: * may be used to endorse or promote products derived from this software
24: * without specific prior written permission.
25: *
26: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36: * SUCH DAMAGE.
37: */
38:
39: /*-
40: * job.c --
41: * handle the creation etc. of our child processes.
42: *
43: * Interface:
1.40 espie 44: * Job_Make Start the creation of the given target.
1.1 deraadt 45: *
1.40 espie 46: * Job_CatchChildren Check for and handle the termination of any
47: * children. This must be called reasonably
48: * frequently to keep the whole make going at
49: * a decent clip, since job table entries aren't
50: * removed until their process is caught this way.
1.41 espie 51: * Its single argument is true if the function
1.40 espie 52: * should block waiting for a child to terminate.
53: *
54: * Job_CatchOutput Print any output our children have produced.
55: * Should also be called fairly frequently to
56: * keep the user informed of what's going on.
57: * If no output is waiting, it will block for
58: * a time given by the SEL_* constants, below,
59: * or until output is ready.
60: *
1.53 jmc 61: * Job_Init Called to initialize this module. in addition,
1.40 espie 62: * any commands attached to the .BEGIN target
63: * are executed before this function returns.
64: * Hence, the makefile must have been parsed
65: * before this function is called.
66: *
67: * Job_End Cleanup any memory used.
68: *
1.41 espie 69: * Job_Full Return true if the job table is filled.
1.40 espie 70: *
1.41 espie 71: * Job_Empty Return true if the job table is completely
1.40 espie 72: * empty.
73: *
74: * Job_Finish Perform any final processing which needs doing.
75: * This includes the execution of any commands
76: * which have been/were attached to the .END
77: * target. It should only be called when the
78: * job table is empty.
79: *
80: * Job_AbortAll Abort all currently running jobs. It doesn't
81: * handle output or do anything for the jobs,
82: * just kills them. It should only be called in
83: * an emergency, as it were.
1.1 deraadt 84: *
1.40 espie 85: * Job_Wait Wait for all currently-running jobs to finish.
1.1 deraadt 86: */
87:
88: #include <sys/types.h>
89: #include <sys/wait.h>
1.41 espie 90: #include <ctype.h>
91: #include <errno.h>
1.1 deraadt 92: #include <fcntl.h>
1.41 espie 93: #include <signal.h>
1.69 espie 94: #include <stdarg.h>
1.1 deraadt 95: #include <stdio.h>
1.42 espie 96: #include <stdlib.h>
1.1 deraadt 97: #include <string.h>
1.41 espie 98: #include <unistd.h>
99: #include "config.h"
100: #include "defines.h"
1.1 deraadt 101: #include "job.h"
1.63 espie 102: #include "engine.h"
1.1 deraadt 103: #include "pathnames.h"
1.41 espie 104: #include "var.h"
105: #include "targ.h"
106: #include "error.h"
107: #include "lst.h"
108: #include "extern.h"
109: #include "gnode.h"
110: #include "memory.h"
111: #include "make.h"
112:
1.50 espie 113: #define TMPPAT "/tmp/makeXXXXXXXXXX"
114:
115: /*
116: * The SEL_ constants determine the maximum amount of time spent in select
117: * before coming out to see if a child has finished. SEL_SEC is the number of
118: * seconds and SEL_USEC is the number of micro-seconds
119: */
120: #define SEL_SEC 0
121: #define SEL_USEC 500000
122:
123:
124: /*-
125: * Job Table definitions.
126: *
127: * Each job has several things associated with it:
128: * 1) The process id of the child shell
129: * 2) The graph node describing the target being made by this job
130: * 3) A LstNode for the first command to be saved after the job
131: * completes. This is NULL if there was no "..." in the job's
132: * commands.
133: * 4) An FILE* for writing out the commands. This is only
134: * used before the job is actually started.
135: * 5) A union of things used for handling the shell's output. Different
136: * parts of the union are used based on the value of the usePipes
137: * flag. If it is true, the output is being caught via a pipe and
138: * the descriptors of our pipe, an array in which output is line
139: * buffered and the current position in that buffer are all
140: * maintained for each job. If, on the other hand, usePipes is false,
141: * the output is routed to a temporary file and all that is kept
142: * is the name of the file and the descriptor open to the file.
143: * 6) An identifier provided by and for the exclusive use of the
144: * Rmt module.
145: * 7) A word of flags which determine how the module handles errors,
146: * echoing, etc. for the job
147: *
148: * The job "table" is kept as a linked Lst in 'jobs', with the number of
149: * active jobs maintained in the 'nJobs' variable. At no time will this
150: * exceed the value of 'maxJobs', initialized by the Job_Init function.
151: *
152: * When a job is finished, the Make_Update function is called on each of the
153: * parents of the node which was just remade. This takes care of the upward
154: * traversal of the dependency graph.
155: */
156: #define JOB_BUFSIZE 1024
157: typedef struct Job_ {
1.51 mpech 158: pid_t pid; /* The child's process ID */
1.50 espie 159: GNode *node; /* The target the child is making */
160: LstNode tailCmds; /* The node of the first command to be
161: * saved when the job has been run */
162: FILE *cmdFILE; /* When creating the shell script, this is
163: * where the commands go */
164: int rmtID; /* ID returned from Rmt module */
165: short flags; /* Flags to control treatment of job */
166: #define JOB_IGNERR 0x001 /* Ignore non-zero exits */
167: #define JOB_SILENT 0x002 /* no output */
168: #define JOB_SPECIAL 0x004 /* Target is a special one. i.e. run it locally
169: * if we can't export it and maxLocal is 0 */
170: #define JOB_IGNDOTS 0x008 /* Ignore "..." lines when processing
171: * commands */
172: #define JOB_FIRST 0x020 /* Job is first job for the node */
173: #define JOB_RESTART 0x080 /* Job needs to be completely restarted */
174: #define JOB_RESUME 0x100 /* Job needs to be resumed b/c it stopped,
175: * for some reason */
176: #define JOB_CONTINUING 0x200 /* We are in the process of resuming this job.
177: * Used to avoid infinite recursion between
178: * JobFinish and JobRestart */
179: union {
180: struct {
181: int op_inPipe; /* Input side of pipe associated
182: * with job's output channel */
183: int op_outPipe; /* Output side of pipe associated with
184: * job's output channel */
185: char op_outBuf[JOB_BUFSIZE + 1];
186: /* Buffer for storing the output of the
187: * job, line by line */
188: int op_curPos; /* Current position in op_outBuf */
189: } o_pipe; /* data used when catching the output via
190: * a pipe */
191: struct {
192: char of_outFile[sizeof(TMPPAT)];
193: /* Name of file to which shell output
194: * was rerouted */
195: int of_outFd; /* Stream open to the output
196: * file. Used to funnel all
197: * from a single job to one file
198: * while still allowing
199: * multiple shell invocations */
200: } o_file; /* Data used when catching the output in
201: * a temporary file */
202: } output; /* Data for tracking a shell's output */
203: } Job;
204:
205: #define outPipe output.o_pipe.op_outPipe
206: #define inPipe output.o_pipe.op_inPipe
207: #define outBuf output.o_pipe.op_outBuf
208: #define curPos output.o_pipe.op_curPos
209: #define outFile output.o_file.of_outFile
210: #define outFd output.o_file.of_outFd
211:
212:
213: /*-
214: * Shell Specifications:
215: * Each shell type has associated with it the following information:
216: * 1) The string which must match the last character of the shell name
217: * for the shell to be considered of this type. The longest match
218: * wins.
219: * 2) A command to issue to turn off echoing of command lines
220: * 3) A command to issue to turn echoing back on again
221: * 4) What the shell prints, and its length, when given the echo-off
222: * command. This line will not be printed when received from the shell
223: * 5) A boolean to tell if the shell has the ability to control
224: * error checking for individual commands.
225: * 6) The string to turn this checking on.
226: * 7) The string to turn it off.
227: * 8) The command-flag to give to cause the shell to start echoing
228: * commands right away.
229: * 9) The command-flag to cause the shell to Lib_Exit when an error is
230: * detected in one of the commands.
231: *
232: * Some special stuff goes on if a shell doesn't have error control. In such
233: * a case, errCheck becomes a printf template for echoing the command,
234: * should echoing be on and ignErr becomes another printf template for
235: * executing the command while ignoring the return status. If either of these
236: * strings is empty when hasErrCtl is false, the command will be executed
237: * anyway as is and if it causes an error, so be it.
238: */
239: typedef struct Shell_ {
240: char *name; /* the name of the shell. For Bourne and C
241: * shells, this is used only to find the
242: * shell description when used as the single
243: * source of a .SHELL target. For user-defined
244: * shells, this is the full path of the shell.
245: */
246: bool hasEchoCtl; /* True if both echoOff and echoOn defined */
247: char *echoOff; /* command to turn off echo */
248: char *echoOn; /* command to turn it back on again */
249: char *noPrint; /* command to skip when printing output from
250: * shell. This is usually the command which
251: * was executed to turn off echoing */
252: int noPLen; /* length of noPrint command */
253: bool hasErrCtl; /* set if can control error checking for
254: * individual commands */
255: char *errCheck; /* string to turn error checking on */
256: char *ignErr; /* string to turn off error checking */
257: /*
258: * command-line flags
259: */
260: char *echo; /* echo commands */
261: char *exit; /* exit on error */
262: } Shell;
263:
1.1 deraadt 264: /*
1.6 millert 265: * error handling variables
1.1 deraadt 266: */
1.40 espie 267: static int errors = 0; /* number of errors reported */
268: static int aborting = 0; /* why is the make aborting? */
269: #define ABORT_ERROR 1 /* Because of an error */
270: #define ABORT_INTERRUPT 2 /* Because it was interrupted */
271: #define ABORT_WAIT 3 /* Waiting for jobs to finish */
1.1 deraadt 272:
1.6 millert 273: /*
1.2 deraadt 274: * XXX: Avoid SunOS bug... FILENO() is fp->_file, and file
275: * is a char! So when we go above 127 we turn negative!
276: */
277: #define FILENO(a) ((unsigned) fileno(a))
1.1 deraadt 278:
279: /*
280: * post-make command processing. The node postCommands is really just the
281: * .END target but we keep it around to avoid having to search for it
282: * all the time.
283: */
1.40 espie 284: static GNode *postCommands; /* node containing commands to execute when
1.1 deraadt 285: * everything else is done */
1.40 espie 286: static int numCommands; /* The number of commands actually printed
1.1 deraadt 287: * for a target. Should this number be
288: * 0, no shell will be executed. */
289:
290: /*
291: * Return values from JobStart.
292: */
1.40 espie 293: #define JOB_RUNNING 0 /* Job is running */
294: #define JOB_ERROR 1 /* Error in starting the job */
295: #define JOB_FINISHED 2 /* The job is already finished */
296: #define JOB_STOPPED 3 /* The job is stopped */
1.1 deraadt 297:
298: /*
1.40 espie 299: * tfile is the name of a file into which all shell commands are put. It is
300: * used over by removing it before the child shell is executed. The XXXXXXXXXX
301: * in the string are replaced by mkstemp(3).
1.1 deraadt 302: */
1.40 espie 303: static char tfile[sizeof(TMPPAT)];
1.1 deraadt 304:
305:
306: /*
307: * Descriptions for various shells.
308: */
1.40 espie 309: static Shell shells[] = {
1.1 deraadt 310: /*
311: * CSH description. The csh can do echo control by playing
312: * with the setting of the 'echo' shell variable. Sadly,
313: * however, it is unable to do error control nicely.
314: */
315: {
316: "csh",
1.41 espie 317: true, "unset verbose", "set verbose", "unset verbose", 10,
318: false, "echo \"%s\"\n", "csh -c \"%s || exit 0\"",
1.1 deraadt 319: "v", "e",
320: },
321: /*
322: * SH description. Echo control is also possible and, under
323: * sun UNIX anyway, one can even control error checking.
324: */
325: {
326: "sh",
1.41 espie 327: true, "set -", "set -v", "set -", 5,
328: true, "set -e", "set +e",
1.2 deraadt 329: #ifdef OLDBOURNESHELL
1.41 espie 330: false, "echo \"%s\"\n", "sh -c '%s || exit 0'\n",
1.2 deraadt 331: #endif
1.1 deraadt 332: "v", "e",
333: },
334: /*
335: * UNKNOWN.
336: */
337: {
1.40 espie 338: (char *)0,
1.41 espie 339: false, (char *)0, (char *)0, (char *)0, 0,
340: false, (char *)0, (char *)0,
1.40 espie 341: (char *)0, (char *)0,
1.1 deraadt 342: }
343: };
1.40 espie 344: static Shell *commandShell = &shells[DEFSHELL];/* this is the shell to
1.1 deraadt 345: * which we pass all
1.64 espie 346: * commands in the Makefile*/
1.70 espie 347: #define SHELL_ECHO_OFF "set -"
348: #define SHELL_ECHO_ON "set -v"
349: #define SHELL_ERROR_ON "set -e"
350: #define SHELL_ERROR_OFF "set +e"
351: #define SHELL_ECHO_FLAG "v"
352: #define SHELL_ERROR_FLAG "e"
1.1 deraadt 353:
1.70 espie 354: static const char *shellPath = _PATH_BSHELL;
355: static const char *shellName = "sh";
1.1 deraadt 356:
1.40 espie 357: static int maxJobs; /* The most children we can run at once */
358: static int maxLocal; /* The most local ones we can have */
1.48 espie 359: static int nJobs = 0; /* The number of children currently running */
360: static int nLocal; /* The number of local children */
361: static LIST jobs; /* The structures that describe them */
362: static bool jobFull; /* Flag to tell when the job table is full. It
1.41 espie 363: * is set true when (1) the total number of
1.1 deraadt 364: * running jobs equals the maximum allowed or
365: * (2) a job can only be run locally, but
366: * nLocal equals maxLocal */
1.40 espie 367: static fd_set *outputsp; /* Set of descriptors of pipes connected to
1.1 deraadt 368: * the output channels of children */
1.8 deraadt 369: static int outputsn;
1.48 espie 370: static GNode *lastNode; /* The node for which output was most recently
1.1 deraadt 371: * produced. */
1.48 espie 372: static char *targFmt; /* Format string to use to head output from a
1.1 deraadt 373: * job when it's not the most-recent job heard
374: * from */
1.2 deraadt 375:
376: # define TARG_FMT "--- %s ---\n" /* Default format */
377: # define MESSAGE(fp, gn) \
1.40 espie 378: (void)fprintf(fp, targFmt, gn->name);
1.1 deraadt 379:
380: /*
1.50 espie 381: * When JobStart attempts to run a job but isn't allowed to,
382: * the job is placed on the stoppedJobs queue to be run
1.6 millert 383: * when the next job finishes.
1.1 deraadt 384: */
1.48 espie 385: static LIST stoppedJobs; /* Lst of Job structures describing
1.1 deraadt 386: * jobs that were stopped due to concurrency
387: * limits or migration home */
388:
389:
390: #if defined(USE_PGRP) && defined(SYSV)
1.40 espie 391: # define KILL(pid, sig) killpg(-(pid), (sig))
1.1 deraadt 392: #else
393: # if defined(USE_PGRP)
1.2 deraadt 394: # define KILL(pid, sig) killpg((pid), (sig))
1.1 deraadt 395: # else
1.2 deraadt 396: # define KILL(pid, sig) kill((pid), (sig))
1.1 deraadt 397: # endif
398: #endif
399:
1.6 millert 400: /*
1.2 deraadt 401: * Grmpf... There is no way to set bits of the wait structure
402: * anymore with the stupid W*() macros. I liked the union wait
403: * stuff much more. So, we devise our own macros... This is
404: * really ugly, use dramamine sparingly. You have been warned.
405: */
406: #define W_SETMASKED(st, val, fun) \
407: { \
408: int sh = (int) ~0; \
409: int mask = fun(sh); \
410: \
411: for (sh = 0; ((mask >> sh) & 1) == 0; sh++) \
412: continue; \
413: *(st) = (*(st) & ~mask) | ((val) << sh); \
414: }
415:
416: #define W_SETTERMSIG(st, val) W_SETMASKED(st, val, WTERMSIG)
417: #define W_SETEXITSTATUS(st, val) W_SETMASKED(st, val, WEXITSTATUS)
418:
419:
1.40 espie 420: static void JobCondPassSig(void *, void *);
1.57 espie 421: static void SigHandler(int);
422: static void HandleSigs(void);
1.40 espie 423: static void JobPassSig(int);
424: static int JobCmpPid(void *, void *);
1.60 espie 425: static int JobPrintCommand(LstNode, void *);
1.40 espie 426: static void JobSaveCommand(void *, void *);
427: static void JobClose(Job *);
428: static void JobFinish(Job *, int *);
429: static void JobExec(Job *, char **);
430: static void JobMakeArgv(Job *, char **);
431: static void JobRestart(Job *);
432: static int JobStart(GNode *, int, Job *);
433: static char *JobOutput(Job *, char *, char *, int);
1.41 espie 434: static void JobDoOutput(Job *, bool);
1.40 espie 435: static void JobInterrupt(int, int);
436: static void JobRestartJobs(void);
1.69 espie 437: static void DBPRINTF(Job *, const char *, ...);
1.1 deraadt 438:
1.57 espie 439: static volatile sig_atomic_t got_SIGINT, got_SIGHUP, got_SIGQUIT,
440: got_SIGTERM;
441: #if defined(USE_PGRP)
442: static volatile sig_atomic_t got_SIGTSTP, got_SIGTTOU, got_SIGTTIN,
443: got_SIGWINCH;
444: #endif
445:
446: static void
447: SigHandler(int sig)
448: {
449: switch(sig) {
450: case SIGINT:
451: got_SIGINT++;
452: break;
453: case SIGHUP:
454: got_SIGHUP++;
455: break;
456: case SIGQUIT:
457: got_SIGQUIT++;
458: break;
459: case SIGTERM:
460: got_SIGTERM++;
461: break;
462: #if defined(USE_PGRGP)
463: case SIGTSTP:
464: got_SIGTSTP++;
465: break;
466: case SIGTTOU:
467: got_SIGTTOU++;
468: break;
469: case SIGTTIN:
470: got_SIGTTIN++;
471: break;
472: case SIGWINCH:
473: got_SIGWINCH++;
474: break;
475: #endif
476: }
477: }
478:
479: static void
480: HandleSigs()
481: {
482: if (got_SIGINT) {
483: got_SIGINT=0;
484: JobPassSig(SIGINT);
485: }
486: if (got_SIGHUP) {
487: got_SIGHUP=0;
488: JobPassSig(SIGHUP);
489: }
490: if (got_SIGQUIT) {
491: got_SIGQUIT=0;
492: JobPassSig(SIGQUIT);
493: }
494: if (got_SIGTERM) {
495: got_SIGTERM=0;
496: JobPassSig(SIGTERM);
497: }
498: #if defined(USE_PGRP)
499: if (got_SIGTSTP) {
500: got_SIGTSTP=0;
501: JobPassSig(SIGTSTP);
502: }
503: if (got_SIGTTOU) {
504: got_SIGTTOU=0;
505: JobPassSig(SIGTTOU);
506: }
507: if (got_SIGTTIN) {
508: got_SIGTTIN=0;
509: JobPassSig(SIGTTIN);
510: }
511: if (got_SIGWINCH) {
512: got_SIGWINCH=0;
513: JobPassSig(SIGWINCH);
514: }
515: #endif
516: }
517:
1.1 deraadt 518: /*-
519: *-----------------------------------------------------------------------
520: * JobCondPassSig --
1.50 espie 521: * Pass a signal to a job if USE_PGRP
1.1 deraadt 522: * is defined.
523: *
524: * Side Effects:
525: * None, except the job may bite it.
526: *-----------------------------------------------------------------------
527: */
1.27 espie 528: static void
1.56 espie 529: JobCondPassSig(void *jobp, /* Job to biff */
530: void *signop) /* Signal to send it */
1.1 deraadt 531: {
1.66 espie 532: Job *job = (Job *)jobp;
533: int signo = *(int *)signop;
534: if (DEBUG(JOB)) {
535: (void)fprintf(stdout,
536: "JobCondPassSig passing signal %d to child %ld.\n",
537: signo, (long)job->pid);
538: (void)fflush(stdout);
539: }
540: KILL(job->pid, signo);
1.1 deraadt 541: }
542:
543: /*-
544: *-----------------------------------------------------------------------
545: * JobPassSig --
1.68 espie 546: * Pass a signal to all local jobs if USE_PGRP is defined,
1.50 espie 547: * then die ourselves.
1.1 deraadt 548: *
549: * Side Effects:
550: * We die by the same signal.
551: *-----------------------------------------------------------------------
552: */
553: static void
1.56 espie 554: JobPassSig(int signo) /* The signal number we've received */
1.1 deraadt 555: {
1.66 espie 556: sigset_t nmask, omask;
557: struct sigaction act;
1.6 millert 558:
1.66 espie 559: if (DEBUG(JOB)) {
560: (void)fprintf(stdout, "JobPassSig(%d) called.\n", signo);
561: (void)fflush(stdout);
562: }
563: Lst_ForEach(&jobs, JobCondPassSig, &signo);
564:
565: /*
566: * Deal with proper cleanup based on the signal received. We only run
567: * the .INTERRUPT target if the signal was in fact an interrupt. The
568: * other three termination signals are more of a "get out *now*"
569: * command.
570: */
571: if (signo == SIGINT) {
572: JobInterrupt(true, signo);
573: } else if (signo == SIGHUP || signo == SIGTERM || signo == SIGQUIT) {
574: JobInterrupt(false, signo);
575: }
1.1 deraadt 576:
1.66 espie 577: /*
578: * Leave gracefully if SIGQUIT, rather than core dumping.
579: */
580: if (signo == SIGQUIT) {
581: Finish(0);
582: }
1.6 millert 583:
1.66 espie 584: /*
585: * Send ourselves the signal now we've given the message to everyone
586: * else. Note we block everything else possible while we're getting
587: * the signal. This ensures that all our jobs get continued when we
588: * wake up before we take any other signal.
589: */
590: sigemptyset(&nmask);
591: sigaddset(&nmask, signo);
592: sigprocmask(SIG_SETMASK, &nmask, &omask);
593: memset(&act, 0, sizeof act);
594: act.sa_handler = SIG_DFL;
595: sigemptyset(&act.sa_mask);
596: act.sa_flags = 0;
597: sigaction(signo, &act, NULL);
1.6 millert 598:
1.66 espie 599: if (DEBUG(JOB)) {
600: (void)fprintf(stdout,
601: "JobPassSig passing signal to self, mask = %x.\n",
602: ~0 & ~(1 << (signo-1)));
603: (void)fflush(stdout);
604: }
605: (void)signal(signo, SIG_DFL);
1.1 deraadt 606:
1.66 espie 607: (void)KILL(getpid(), signo);
1.1 deraadt 608:
1.66 espie 609: signo = SIGCONT;
610: Lst_ForEach(&jobs, JobCondPassSig, &signo);
1.1 deraadt 611:
1.66 espie 612: (void)sigprocmask(SIG_SETMASK, &omask, NULL);
613: sigprocmask(SIG_SETMASK, &omask, NULL);
614: act.sa_handler = SigHandler;
615: sigaction(signo, &act, NULL);
1.1 deraadt 616: }
617:
618: /*-
619: *-----------------------------------------------------------------------
620: * JobCmpPid --
621: * Compare the pid of the job with the given pid and return 0 if they
622: * are equal. This function is called from Job_CatchChildren via
623: * Lst_Find to find the job descriptor of the finished job.
624: *
625: * Results:
626: * 0 if the pid's match
627: *-----------------------------------------------------------------------
628: */
629: static int
1.56 espie 630: JobCmpPid(void *job, /* job to examine */
631: void *pid) /* process id desired */
1.1 deraadt 632: {
1.66 espie 633: return *(pid_t *)pid - ((Job *)job)->pid;
1.1 deraadt 634: }
635:
1.69 espie 636: static void
637: DBPRINTF(Job *job, const char *fmt, ...)
638: {
639: va_list va;
640: va_start(va, fmt);
641: if (DEBUG(JOB)) {
642: (void)vfprintf(stdout, fmt, va);
643: fflush(stdout);
644: }
645: vfprintf(job->cmdFILE, fmt, va);
646: va_end(va);
647: }
648:
1.1 deraadt 649: /*-
650: *-----------------------------------------------------------------------
651: * JobPrintCommand --
652: * Put out another command for the given job. If the command starts
653: * with an @ or a - we process it specially. In the former case,
654: * so long as the -s and -n flags weren't given to make, we stick
655: * a shell-specific echoOff command in the script. In the latter,
656: * we ignore errors for the entire job, unless the shell has error
657: * control.
658: * If the command is just "..." we take all future commands for this
659: * job to be commands to be executed once the entire graph has been
660: * made and return non-zero to signal that the end of the commands
661: * was reached. These commands are later attached to the postCommands
662: * node and executed by Job_End when all things are done.
1.40 espie 663: * This function is called from JobStart via Lst_Find
1.1 deraadt 664: *
665: * Results:
1.26 espie 666: * Always 1, unless the command was "..."
1.1 deraadt 667: *
668: * Side Effects:
669: * If the command begins with a '-' and the shell has no error control,
670: * the JOB_IGNERR flag is set in the job descriptor.
671: * If the command is "..." and we're not ignoring such things,
672: * tailCmds is set to the successor node of the cmd.
673: * numCommands is incremented if the command is actually printed.
674: *-----------------------------------------------------------------------
675: */
676: static int
1.60 espie 677: JobPrintCommand(LstNode cmdNode, /* command string to print */
1.56 espie 678: void *jobp) /* job for which to print it */
1.1 deraadt 679: {
1.66 espie 680: bool noSpecials; /* true if we shouldn't worry about
681: * inserting special commands into
682: * the input stream. */
683: bool shutUp = false; /* true if we put a no echo command
684: * into the command file */
685: bool errOff = false; /* true if we turned error checking
686: * off before printing the command
687: * and need to turn it back on */
688: char *cmdTemplate; /* Template to use when printing the
689: * command */
690: char *cmdStart; /* Start of expanded command */
691: char *cmd = (char *)Lst_Datum(cmdNode);
692: Job *job = (Job *)jobp;
693:
694: noSpecials = (noExecute && !(job->node->type & OP_MAKE));
695:
696: if (strcmp(cmd, "...") == 0) {
697: job->node->type |= OP_SAVE_CMDS;
698: if ((job->flags & JOB_IGNDOTS) == 0) {
699: job->tailCmds = Lst_Succ(cmdNode);
700: return 0;
701: }
702: return 1;
1.2 deraadt 703: }
1.1 deraadt 704:
1.67 espie 705: numCommands++;
1.1 deraadt 706:
1.66 espie 707: /* For debugging, we replace each command with the result of expanding
708: * the variables in the command. */
709: cmdStart = cmd = Var_Subst(cmd, &job->node->context, false);
710: Lst_Replace(cmdNode, cmdStart);
1.1 deraadt 711:
1.66 espie 712: cmdTemplate = "%s\n";
1.1 deraadt 713:
1.66 espie 714: /*
715: * Check for leading @' and -'s to control echoing and error checking.
716: */
717: for (;; cmd++) {
718: if (*cmd == '@')
719: shutUp = DEBUG(LOUD) ? false : true;
720: else if (*cmd == '-')
721: errOff = true;
722: else if (*cmd != '+')
723: break;
1.1 deraadt 724: }
725:
1.66 espie 726: while (isspace(*cmd))
727: cmd++;
728:
729: if (shutUp) {
1.72 ! espie 730: if (!(job->flags & JOB_SILENT) && !noSpecials) {
1.71 espie 731: DBPRINTF(job, "%s\n", SHELL_ECHO_OFF);
1.1 deraadt 732: } else {
1.66 espie 733: shutUp = false;
734: }
735: }
736:
737: if (errOff) {
738: if ( !(job->flags & JOB_IGNERR) && !noSpecials) {
1.72 ! espie 739: /*
! 740: * we don't want the error-control commands
! 741: * showing up either, so we turn off echoing
! 742: * while executing them. We could put another
! 743: * field in the shell structure to tell
! 744: * JobDoOutput to look for this string too, but
! 745: * why make it any more complex than it already
! 746: * is?
! 747: */
! 748: if (!(job->flags & JOB_SILENT) && !shutUp) {
! 749: DBPRINTF(job, "%s\n", SHELL_ECHO_OFF);
! 750: DBPRINTF(job, "%s\n", SHELL_ERROR_OFF);
! 751: DBPRINTF(job, "%s\n", SHELL_ECHO_ON);
1.66 espie 752: } else {
1.72 ! espie 753: DBPRINTF(job, "%s\n", SHELL_ERROR_OFF);
1.66 espie 754: }
755: } else {
756: errOff = false;
1.1 deraadt 757: }
1.66 espie 758: }
759:
1.69 espie 760: DBPRINTF(job, cmdTemplate, cmd);
1.66 espie 761:
762: if (errOff) {
763: /*
764: * If echoing is already off, there's no point in issuing the
765: * echoOff command. Otherwise we issue it and pretend it was on
766: * for the whole command...
1.1 deraadt 767: */
1.72 ! espie 768: if (!shutUp && !(job->flags & JOB_SILENT)) {
1.71 espie 769: DBPRINTF(job, "%s\n", SHELL_ECHO_OFF);
1.41 espie 770: shutUp = true;
1.1 deraadt 771: }
1.71 espie 772: DBPRINTF(job, "%s\n", SHELL_ERROR_ON);
1.66 espie 773: }
774: if (shutUp) {
1.71 espie 775: DBPRINTF(job, "%s\n", SHELL_ECHO_ON);
1.1 deraadt 776: }
1.66 espie 777: return 1;
1.1 deraadt 778: }
779:
780: /*-
781: *-----------------------------------------------------------------------
782: * JobSaveCommand --
783: * Save a command to be executed when everything else is done.
784: * Callback function for JobFinish...
785: *
786: * Side Effects:
787: * The command is tacked onto the end of postCommands's commands list.
788: *-----------------------------------------------------------------------
789: */
1.27 espie 790: static void
1.56 espie 791: JobSaveCommand(void *cmd, void *gn)
1.1 deraadt 792: {
1.66 espie 793: GNode *g = (GNode *)gn;
794: char *result;
1.28 espie 795:
1.66 espie 796: result = Var_Subst((char *)cmd, &g->context, false);
797: Lst_AtEnd(&postCommands->commands, result);
1.2 deraadt 798: }
799:
800:
801: /*-
802: *-----------------------------------------------------------------------
803: * JobClose --
804: * Called to close both input and output pipes when a job is finished.
805: *
806: * Side Effects:
807: * The file descriptors associated with the job are closed.
808: *-----------------------------------------------------------------------
809: */
810: static void
1.56 espie 811: JobClose(Job *job)
1.2 deraadt 812: {
1.66 espie 813: if (usePipes) {
814: FD_CLR(job->inPipe, outputsp);
815: if (job->outPipe != job->inPipe) {
816: (void)close(job->outPipe);
817: }
818: JobDoOutput(job, true);
819: (void)close(job->inPipe);
820: } else {
821: (void)close(job->outFd);
822: JobDoOutput(job, true);
823: }
1.1 deraadt 824: }
825:
826: /*-
827: *-----------------------------------------------------------------------
828: * JobFinish --
829: * Do final processing for the given job including updating
830: * parents and starting new jobs as available/necessary. Note
831: * that we pay no attention to the JOB_IGNERR flag here.
832: * This is because when we're called because of a noexecute flag
833: * or something, jstat.w_status is 0 and when called from
834: * Job_CatchChildren, the status is zeroed if it s/b ignored.
835: *
836: * Side Effects:
837: * Some nodes may be put on the toBeMade queue.
838: * Final commands for the job are placed on postCommands.
839: *
1.6 millert 840: * If we got an error and are aborting (aborting == ABORT_ERROR) and
1.1 deraadt 841: * the job list is now empty, we are done for the day.
1.6 millert 842: * If we recognized an error (errors !=0), we set the aborting flag
1.1 deraadt 843: * to ABORT_ERROR so no more jobs will be started.
844: *-----------------------------------------------------------------------
845: */
846: /*ARGSUSED*/
847: static void
1.56 espie 848: JobFinish(Job *job, /* job to finish */
849: int *status) /* sub-why job went away */
1.2 deraadt 850: {
1.66 espie 851: bool done;
1.2 deraadt 852:
1.66 espie 853: if ((WIFEXITED(*status) &&
854: WEXITSTATUS(*status) != 0 && !(job->flags & JOB_IGNERR)) ||
855: (WIFSIGNALED(*status) && WTERMSIG(*status) != SIGCONT)) {
856: /*
857: * If it exited non-zero and either we're doing things our
858: * way or we're not ignoring errors, the job is finished.
859: * Similarly, if the shell died because of a signal
860: * the job is also finished. In these
861: * cases, finish out the job's output before printing the exit
862: * status...
863: */
864: JobClose(job);
865: if (job->cmdFILE != NULL && job->cmdFILE != stdout) {
866: (void)fclose(job->cmdFILE);
867: }
868: done = true;
869: } else if (WIFEXITED(*status)) {
870: /*
871: * Deal with ignored errors in -B mode. We need to print a
872: * message telling of the ignored error as well as setting
873: * status.w_status to 0 so the next command gets run. To do
874: * this, we set done to be true if in -B mode and the job
875: * exited non-zero.
876: */
877: done = WEXITSTATUS(*status) != 0;
878: /*
879: * Old comment said: "Note we don't want to close down any of
880: * the streams until we know we're at the end." But we do.
881: * Otherwise when are we going to print the rest of the stuff?
882: */
883: JobClose(job);
884: } else {
885: /*
886: * No need to close things down or anything.
887: */
888: done = false;
1.1 deraadt 889: }
1.6 millert 890:
1.66 espie 891: if (done ||
892: WIFSTOPPED(*status) ||
893: (WIFSIGNALED(*status) && WTERMSIG(*status) == SIGCONT) ||
894: DEBUG(JOB)) {
895: FILE *out;
896:
897: if (compatMake && !usePipes && (job->flags & JOB_IGNERR)) {
898: /*
899: * If output is going to a file and this job is ignoring
900: * errors, arrange to have the exit status sent to the
901: * output file as well.
902: */
903: out = fdopen(job->outFd, "w");
904: } else {
905: out = stdout;
906: }
1.1 deraadt 907:
1.66 espie 908: if (WIFEXITED(*status)) {
909: if (DEBUG(JOB)) {
1.68 espie 910: (void)fprintf(stdout, "Process %ld exited.\n",
1.66 espie 911: (long)job->pid);
912: (void)fflush(stdout);
913: }
914: if (WEXITSTATUS(*status) != 0) {
915: if (usePipes && job->node != lastNode) {
916: MESSAGE(out, job->node);
917: lastNode = job->node;
918: }
919: (void)fprintf(out, "*** Error code %d%s\n",
920: WEXITSTATUS(*status),
1.68 espie 921: (job->flags & JOB_IGNERR) ? "(ignored)" :
1.66 espie 922: "");
923:
924: if (job->flags & JOB_IGNERR) {
925: *status = 0;
926: }
927: } else if (DEBUG(JOB)) {
928: if (usePipes && job->node != lastNode) {
929: MESSAGE(out, job->node);
930: lastNode = job->node;
931: }
1.68 espie 932: (void)fprintf(out,
1.66 espie 933: "*** Completed successfully\n");
934: }
935: } else if (WIFSTOPPED(*status)) {
936: if (DEBUG(JOB)) {
1.68 espie 937: (void)fprintf(stdout, "Process %ld stopped.\n",
1.66 espie 938: (long)job->pid);
939: (void)fflush(stdout);
940: }
941: if (usePipes && job->node != lastNode) {
942: MESSAGE(out, job->node);
943: lastNode = job->node;
944: }
945: (void)fprintf(out, "*** Stopped -- signal %d\n",
946: WSTOPSIG(*status));
947: job->flags |= JOB_RESUME;
948: Lst_AtEnd(&stoppedJobs, job);
949: (void)fflush(out);
950: return;
951: } else if (WTERMSIG(*status) == SIGCONT) {
952: /*
953: * If the beastie has continued, shift the Job from the
954: * stopped list to the running one (or re-stop it if
955: * concurrency is exceeded) and go and get another
956: * child.
957: */
958: if (job->flags & (JOB_RESUME|JOB_RESTART)) {
959: if (usePipes && job->node != lastNode) {
960: MESSAGE(out, job->node);
961: lastNode = job->node;
962: }
963: (void)fprintf(out, "*** Continued\n");
964: }
965: if (!(job->flags & JOB_CONTINUING)) {
966: if (DEBUG(JOB)) {
967: (void)fprintf(stdout,
968: "Warning: process %ld was not continuing.\n",
969: (long)job->pid);
970: (void)fflush(stdout);
971: }
972: #if 0
973: /*
974: * We don't really want to restart a job from
975: * scratch just because it continued,
976: * especially not without killing the
977: * continuing process! That's why this is
978: * ifdef'ed out. FD - 9/17/90
979: */
980: JobRestart(job);
1.2 deraadt 981: #endif
1.66 espie 982: }
983: job->flags &= ~JOB_CONTINUING;
984: Lst_AtEnd(&jobs, job);
1.67 espie 985: nJobs++;
1.66 espie 986: if (DEBUG(JOB)) {
987: (void)fprintf(stdout,
988: "Process %ld is continuing locally.\n",
989: (long)job->pid);
990: (void)fflush(stdout);
991: }
1.67 espie 992: nLocal++;
1.66 espie 993: if (nJobs == maxJobs) {
994: jobFull = true;
995: if (DEBUG(JOB)) {
1.68 espie 996: (void)fprintf(stdout,
1.66 espie 997: "Job queue is full.\n");
998: (void)fflush(stdout);
999: }
1000: }
1001: (void)fflush(out);
1002: return;
1003: } else {
1004: if (usePipes && job->node != lastNode) {
1005: MESSAGE(out, job->node);
1006: lastNode = job->node;
1007: }
1.68 espie 1008: (void)fprintf(out, "*** Signal %d\n",
1.66 espie 1009: WTERMSIG(*status));
1.40 espie 1010: }
1.66 espie 1011:
1012: (void)fflush(out);
1.1 deraadt 1013: }
1014:
1.66 espie 1015: /*
1016: * Now handle the -B-mode stuff. If the beast still isn't finished,
1017: * try and restart the job on the next command. If JobStart says it's
1018: * ok, it's ok. If there's an error, this puppy is done.
1019: */
1020: if (compatMake && WIFEXITED(*status) && job->node->current != NULL) {
1021: switch (JobStart(job->node, job->flags & JOB_IGNDOTS, job)) {
1022: case JOB_RUNNING:
1023: done = false;
1024: break;
1025: case JOB_ERROR:
1026: done = true;
1027: W_SETEXITSTATUS(status, 1);
1028: break;
1029: case JOB_FINISHED:
1030: /*
1031: * If we got back a JOB_FINISHED code, JobStart has
1032: * already called Make_Update and freed the job
1033: * descriptor. We set done to false here to avoid fake
1034: * cycles and double frees. JobStart needs to do the
1035: * update so we can proceed up the graph when given the
1036: * -n flag..
1037: */
1038: done = false;
1039: break;
1040: }
1041: } else
1042: done = true;
1.1 deraadt 1043:
1.66 espie 1044: if (done &&
1045: aborting != ABORT_ERROR &&
1046: aborting != ABORT_INTERRUPT &&
1047: *status == 0) {
1048: /* As long as we aren't aborting and the job didn't return a
1049: * non-zero status that we shouldn't ignore, we call
1050: * Make_Update to update the parents. In addition, any saved
1051: * commands for the node are placed on the .END target. */
1052: Lst_ForEachFrom(job->tailCmds, JobSaveCommand, job->node);
1053: job->node->made = MADE;
1054: Make_Update(job->node);
1055: free(job);
1056: } else if (*status != 0) {
1.67 espie 1057: errors++;
1.66 espie 1058: free(job);
1059: }
1.1 deraadt 1060:
1.66 espie 1061: JobRestartJobs();
1.1 deraadt 1062:
1063: /*
1.66 espie 1064: * Set aborting if any error.
1.1 deraadt 1065: */
1.66 espie 1066: if (errors && !keepgoing && aborting != ABORT_INTERRUPT) {
1067: /*
1068: * If we found any errors in this batch of children and the -k
1069: * flag wasn't given, we set the aborting flag so no more jobs
1070: * get started.
1071: */
1072: aborting = ABORT_ERROR;
1073: }
1.6 millert 1074:
1.66 espie 1075: if (aborting == ABORT_ERROR && Job_Empty()) {
1076: /*
1077: * If we are aborting and the job table is now empty, we finish.
1078: */
1079: (void)eunlink(tfile);
1080: Finish(errors);
1081: }
1.1 deraadt 1082: }
1083:
1084: /*-
1085: *-----------------------------------------------------------------------
1086: * JobExec --
1087: * Execute the shell for the given job. Called from JobStart and
1088: * JobRestart.
1089: *
1090: * Side Effects:
1091: * A shell is executed, outputs is altered and the Job structure added
1092: * to the job table.
1093: *-----------------------------------------------------------------------
1094: */
1095: static void
1.56 espie 1096: JobExec(Job *job, char **argv)
1.1 deraadt 1097: {
1.66 espie 1098: pid_t cpid; /* ID of new child */
1.6 millert 1099:
1.66 espie 1100: if (DEBUG(JOB)) {
1101: int i;
1.6 millert 1102:
1.66 espie 1103: (void)fprintf(stdout, "Running %s\n", job->node->name);
1104: (void)fprintf(stdout, "\tCommand: ");
1105: for (i = 0; argv[i] != NULL; i++) {
1106: (void)fprintf(stdout, "%s ", argv[i]);
1107: }
1108: (void)fprintf(stdout, "\n");
1109: (void)fflush(stdout);
1.1 deraadt 1110: }
1.6 millert 1111:
1.66 espie 1112: /*
1113: * Some jobs produce no output and it's disconcerting to have
1114: * no feedback of their running (since they produce no output, the
1115: * banner with their name in it never appears). This is an attempt to
1116: * provide that feedback, even if nothing follows it.
1117: */
1118: if (lastNode != job->node && (job->flags & JOB_FIRST) &&
1119: !(job->flags & JOB_SILENT)) {
1120: MESSAGE(stdout, job->node);
1121: lastNode = job->node;
1122: }
1.1 deraadt 1123:
1.66 espie 1124: if ((cpid = fork()) == -1) {
1125: Punt("Cannot fork");
1126: } else if (cpid == 0) {
1.6 millert 1127:
1.66 espie 1128: /*
1129: * Must duplicate the input stream down to the child's input
1130: * and reset it to the beginning (again). Since the stream was
1131: * marked close-on-exec, we must clear that bit in the new
1132: * input.
1133: */
1134: if (dup2(FILENO(job->cmdFILE), 0) == -1)
1135: Punt("Cannot dup2: %s", strerror(errno));
1136: (void)fcntl(0, F_SETFD, 0);
1137: (void)lseek(0, 0, SEEK_SET);
1138:
1139: if (usePipes) {
1140: /*
1141: * Set up the child's output to be routed through the
1142: * pipe we've created for it.
1143: */
1144: if (dup2(job->outPipe, 1) == -1)
1145: Punt("Cannot dup2: %s", strerror(errno));
1146: } else {
1147: /*
1148: * We're capturing output in a file, so we duplicate the
1149: * descriptor to the temporary file into the standard
1150: * output.
1151: */
1152: if (dup2(job->outFd, 1) == -1)
1153: Punt("Cannot dup2: %s", strerror(errno));
1154: }
1155: /*
1156: * The output channels are marked close on exec. This bit was
1157: * duplicated by the dup2 (on some systems), so we have to
1158: * clear it before routing the shell's error output to the same
1159: * place as its standard output.
1160: */
1161: (void)fcntl(1, F_SETFD, 0);
1162: if (dup2(1, 2) == -1)
1163: Punt("Cannot dup2: %s", strerror(errno));
1.1 deraadt 1164:
1165: #ifdef USE_PGRP
1.66 espie 1166: /*
1167: * We want to switch the child into a different process family
1168: * so we can kill it and all its descendants in one fell swoop,
1169: * by killing its process family, but not commit suicide.
1170: */
1.2 deraadt 1171: # if defined(SYSV)
1.66 espie 1172: (void)setsid();
1.2 deraadt 1173: # else
1.66 espie 1174: (void)setpgid(0, getpid());
1.2 deraadt 1175: # endif
1176: #endif /* USE_PGRP */
1.1 deraadt 1177:
1.66 espie 1178: (void)execv(shellPath, argv);
1179:
1180: (void)write(STDERR_FILENO, "Could not execute shell\n",
1181: sizeof("Could not execute shell"));
1182: _exit(1);
1183: } else {
1184: job->pid = cpid;
1185:
1186: if (usePipes && (job->flags & JOB_FIRST) ) {
1187: /*
1188: * The first time a job is run for a node, we set the
1189: * current position in the buffer to the beginning and
1190: * mark another stream to watch in the outputs mask
1191: */
1192: job->curPos = 0;
1193:
1194: if (outputsp == NULL || job->inPipe > outputsn) {
1195: int bytes, obytes;
1196: char *tmp;
1197:
1.68 espie 1198: bytes = howmany(job->inPipe+1, NFDBITS) *
1.66 espie 1199: sizeof(fd_mask);
1.68 espie 1200: obytes = outputsn ?
1201: howmany(outputsn+1, NFDBITS) *
1.66 espie 1202: sizeof(fd_mask) : 0;
1203:
1204: if (bytes != obytes) {
1205: tmp = realloc(outputsp, bytes);
1206: if (tmp == NULL)
1207: return;
1208: memset(tmp + obytes, 0, bytes - obytes);
1209: outputsp = (fd_set *)tmp;
1210: }
1211: outputsn = job->inPipe;
1212: }
1213: FD_SET(job->inPipe, outputsp);
1214: }
1.2 deraadt 1215:
1.67 espie 1216: nLocal++;
1.66 espie 1217: /*
1218: * XXX: Used to not happen if REMOTE. Why?
1219: */
1220: if (job->cmdFILE != NULL && job->cmdFILE != stdout) {
1221: (void)fclose(job->cmdFILE);
1222: job->cmdFILE = NULL;
1223: }
1.1 deraadt 1224: }
1225:
1.48 espie 1226: /*
1.66 espie 1227: * Now the job is actually running, add it to the table.
1.48 espie 1228: */
1.67 espie 1229: nJobs++;
1.66 espie 1230: Lst_AtEnd(&jobs, job);
1231: if (nJobs == maxJobs) {
1232: jobFull = true;
1.1 deraadt 1233: }
1234: }
1235:
1236: /*-
1237: *-----------------------------------------------------------------------
1238: * JobMakeArgv --
1239: * Create the argv needed to execute the shell for a given job.
1240: *-----------------------------------------------------------------------
1241: */
1242: static void
1.56 espie 1243: JobMakeArgv(Job *job, char **argv)
1.1 deraadt 1244: {
1.66 espie 1245: int argc;
1246: static char args[10]; /* For merged arguments */
1.6 millert 1247:
1.70 espie 1248: argv[0] = (char *)shellName;
1.66 espie 1249: argc = 1;
1.1 deraadt 1250:
1.66 espie 1251: if ((commandShell->exit && *commandShell->exit != '-') ||
1252: (commandShell->echo && *commandShell->echo != '-')) {
1253: /*
1254: * At least one of the flags doesn't have a minus before it, so
1255: * merge them together. Have to do this because the
1256: * *(&(@*#*&#$# Bourne shell thinks its second argument is a
1257: * file to source. Grrrr. Note the ten-character limitation on
1258: * the combined arguments.
1259: */
1260: (void)snprintf(args, sizeof(args), "-%s%s",
1261: ((job->flags & JOB_IGNERR) ? "" :
1262: (commandShell->exit ? commandShell->exit : "")),
1263: ((job->flags & JOB_SILENT) ? "" :
1264: (commandShell->echo ? commandShell->echo : "")));
1265:
1266: if (args[1]) {
1267: argv[argc] = args;
1268: argc++;
1269: }
1270: } else {
1271: if (!(job->flags & JOB_IGNERR) && commandShell->exit) {
1272: argv[argc] = commandShell->exit;
1273: argc++;
1274: }
1275: if (!(job->flags & JOB_SILENT) && commandShell->echo) {
1276: argv[argc] = commandShell->echo;
1277: argc++;
1278: }
1.1 deraadt 1279: }
1.66 espie 1280: argv[argc] = NULL;
1.1 deraadt 1281: }
1282:
1283: /*-
1284: *-----------------------------------------------------------------------
1285: * JobRestart --
1.6 millert 1286: * Restart a job that stopped for some reason.
1.1 deraadt 1287: *
1288: * Side Effects:
1289: * jobFull will be set if the job couldn't be run.
1290: *-----------------------------------------------------------------------
1291: */
1292: static void
1.56 espie 1293: JobRestart(Job *job)
1.1 deraadt 1294: {
1.66 espie 1295: if (job->flags & JOB_RESTART) {
1296: /*
1297: * Set up the control arguments to the shell. This is based on
1298: * the flags set earlier for this job. If the JOB_IGNERR flag
1299: * is clear, the 'exit' flag of the commandShell is used to
1300: * cause it to exit upon receiving an error. If the JOB_SILENT
1301: * flag is clear, the 'echo' flag of the commandShell is used
1302: * to get it to start echoing as soon as it starts processing
1303: * commands.
1304: */
1305: char *argv[4];
1.6 millert 1306:
1.66 espie 1307: JobMakeArgv(job, argv);
1.2 deraadt 1308:
1.1 deraadt 1309: if (DEBUG(JOB)) {
1.68 espie 1310: (void)fprintf(stdout, "Restarting %s...",
1.66 espie 1311: job->node->name);
1312: (void)fflush(stdout);
1.1 deraadt 1313: }
1.66 espie 1314: if (nLocal >= maxLocal && !(job->flags & JOB_SPECIAL)) {
1315: /*
1316: * Can't be exported and not allowed to run locally --
1317: * put it back on the hold queue and mark the table
1318: * full
1319: */
1320: if (DEBUG(JOB)) {
1321: (void)fprintf(stdout, "holding\n");
1322: (void)fflush(stdout);
1323: }
1324: Lst_AtFront(&stoppedJobs, job);
1325: jobFull = true;
1326: if (DEBUG(JOB)) {
1327: (void)fprintf(stdout, "Job queue is full.\n");
1328: (void)fflush(stdout);
1329: }
1330: return;
1331: } else {
1332: /*
1333: * Job may be run locally.
1334: */
1335: if (DEBUG(JOB)) {
1336: (void)fprintf(stdout, "running locally\n");
1337: (void)fflush(stdout);
1338: }
1.1 deraadt 1339: }
1.66 espie 1340: JobExec(job, argv);
1341: } else {
1.1 deraadt 1342: /*
1.66 espie 1343: * The job has stopped and needs to be restarted. Why it
1344: * stopped, we don't know...
1.1 deraadt 1345: */
1346: if (DEBUG(JOB)) {
1.66 espie 1347: (void)fprintf(stdout, "Resuming %s...", job->node->name);
1348: (void)fflush(stdout);
1.1 deraadt 1349: }
1.66 espie 1350: if ((nLocal < maxLocal ||
1351: ((job->flags & JOB_SPECIAL) &&
1352: maxLocal == 0)
1353: ) && nJobs != maxJobs) {
1354: /*
1355: * If we haven't reached the concurrency limit already
1356: * (or maxLocal is 0), it's ok to resume the job.
1357: */
1358: bool error;
1359: int status;
1360:
1361: error = KILL(job->pid, SIGCONT) != 0;
1362:
1363: if (!error) {
1364: /*
1365: * Make sure the user knows we've continued the
1366: * beast and actually put the thing in the job
1367: * table.
1368: */
1369: job->flags |= JOB_CONTINUING;
1370: W_SETTERMSIG(&status, SIGCONT);
1371: JobFinish(job, &status);
1372:
1373: job->flags &= ~(JOB_RESUME|JOB_CONTINUING);
1374: if (DEBUG(JOB)) {
1375: (void)fprintf(stdout, "done\n");
1376: (void)fflush(stdout);
1377: }
1378: } else {
1379: Error("couldn't resume %s: %s",
1380: job->node->name, strerror(errno));
1381: status = 0;
1382: W_SETEXITSTATUS(&status, 1);
1383: JobFinish(job, &status);
1384: }
1385: } else {
1386: /*
1387: * Job cannot be restarted. Mark the table as full and
1388: * place the job back on the list of stopped jobs.
1389: */
1390: if (DEBUG(JOB)) {
1391: (void)fprintf(stdout, "table full\n");
1392: (void)fflush(stdout);
1393: }
1394: Lst_AtFront(&stoppedJobs, job);
1395: jobFull = true;
1396: if (DEBUG(JOB)) {
1397: (void)fprintf(stdout, "Job queue is full.\n");
1398: (void)fflush(stdout);
1399: }
1.1 deraadt 1400: }
1401: }
1402: }
1403:
1404: /*-
1405: *-----------------------------------------------------------------------
1406: * JobStart --
1407: * Start a target-creation process going for the target described
1.6 millert 1408: * by the graph node gn.
1.1 deraadt 1409: *
1410: * Results:
1411: * JOB_ERROR if there was an error in the commands, JOB_FINISHED
1412: * if there isn't actually anything left to do for the job and
1413: * JOB_RUNNING if the job has been started.
1414: *
1415: * Side Effects:
1416: * A new Job node is created and added to the list of running
1417: * jobs. PMake is forked and a child shell created.
1418: *-----------------------------------------------------------------------
1419: */
1420: static int
1.56 espie 1421: JobStart(GNode *gn, /* target to create */
1422: int flags, /* flags for the job to override normal ones.
1.1 deraadt 1423: * e.g. JOB_SPECIAL or JOB_IGNDOTS */
1.56 espie 1424: Job *previous) /* The previous Job structure for this node,
1.1 deraadt 1425: * if any. */
1426: {
1.66 espie 1427: Job *job; /* new job descriptor */
1428: char *argv[4]; /* Argument vector to shell */
1429: bool cmdsOK; /* true if the nodes commands were all right */
1430: bool local; /* Set true if the job was run locally */
1431: bool noExec; /* Set true if we decide not to run the job */
1432:
1433: if (previous != NULL) {
1434: previous->flags &= ~(JOB_FIRST|JOB_IGNERR|JOB_SILENT);
1435: job = previous;
1436: } else {
1437: job = emalloc(sizeof(Job));
1438: if (job == NULL) {
1439: Punt("JobStart out of memory");
1440: }
1441: flags |= JOB_FIRST;
1.1 deraadt 1442: }
1443:
1.66 espie 1444: job->node = gn;
1445: job->tailCmds = NULL;
1.1 deraadt 1446:
1447: /*
1.66 espie 1448: * Set the initial value of the flags for this job based on the global
1449: * ones and the node's attributes... Any flags supplied by the caller
1450: * are also added to the field.
1.1 deraadt 1451: */
1.66 espie 1452: job->flags = 0;
1453: if (Targ_Ignore(gn)) {
1454: job->flags |= JOB_IGNERR;
1455: }
1456: if (Targ_Silent(gn)) {
1457: job->flags |= JOB_SILENT;
1.1 deraadt 1458: }
1.66 espie 1459: job->flags |= flags;
1.6 millert 1460:
1.1 deraadt 1461: /*
1.66 espie 1462: * Check the commands now so any attributes from .DEFAULT have a chance
1463: * to migrate to the node
1.1 deraadt 1464: */
1.66 espie 1465: if (!compatMake && job->flags & JOB_FIRST) {
1466: cmdsOK = Job_CheckCommands(gn, Error);
1467: } else {
1468: cmdsOK = true;
1469: }
1.1 deraadt 1470:
1471: /*
1.66 espie 1472: * If the -n flag wasn't given, we open up OUR (not the child's)
1473: * temporary file to stuff commands in it. The thing is rd/wr so we
1474: * don't need to reopen it to feed it to the shell. If the -n flag
1475: * *was* given, we just set the file to be stdout. Cute, huh?
1.1 deraadt 1476: */
1.66 espie 1477: if ((gn->type & OP_MAKE) || (!noExecute && !touchFlag)) {
1478: /*
1479: * We're serious here, but if the commands were bogus, we're
1480: * also dead...
1481: */
1482: if (!cmdsOK) {
1483: DieHorribly();
1484: }
1.6 millert 1485:
1.66 espie 1486: job->cmdFILE = fopen(tfile, "w+");
1487: if (job->cmdFILE == NULL) {
1488: Punt("Could not open %s", tfile);
1489: }
1490: (void)fcntl(FILENO(job->cmdFILE), F_SETFD, 1);
1491: /*
1492: * Send the commands to the command file, flush all its buffers
1493: * then rewind and remove the thing.
1494: */
1495: noExec = false;
1496:
1497: /*
1498: * used to be backwards; replace when start doing multiple
1499: * commands per shell.
1500: */
1501: if (compatMake) {
1502: /*
1503: * Be compatible: If this is the first time for this
1504: * node, verify its commands are ok and open the
1505: * commands list for sequential access by later
1506: * invocations of JobStart. Once that is done, we take
1507: * the next command off the list and print it to the
1508: * command file. If the command was an ellipsis, note
1509: * that there's nothing more to execute.
1510: */
1511: if ((job->flags&JOB_FIRST))
1512: gn->current = Lst_First(&gn->commands);
1513: else
1514: gn->current = Lst_Succ(gn->current);
1515:
1516: if (gn->current == NULL ||
1517: !JobPrintCommand(gn->current, job)) {
1518: noExec = true;
1519: gn->current = NULL;
1520: }
1521: if (noExec && !(job->flags & JOB_FIRST)) {
1522: /*
1523: * If we're not going to execute anything, the
1524: * job is done and we need to close down the
1525: * various file descriptors we've opened for
1526: * output, then call JobDoOutput to catch the
1527: * final characters or send the file to the
1528: * screen... Note that the i/o streams are only
1529: * open if this isn't the first job. Note also
1530: * that this could not be done in
1531: * Job_CatchChildren b/c it wasn't clear if
1532: * there were more commands to execute or
1533: * not...
1534: */
1535: JobClose(job);
1536: }
1537: } else {
1538: /*
1539: * We can do all the commands at once. hooray for
1540: * sanity
1541: */
1542: numCommands = 0;
1.68 espie 1543: Lst_ForEachNodeWhile(&gn->commands, JobPrintCommand,
1.66 espie 1544: job);
1545:
1546: /*
1547: * If we didn't print out any commands to the shell
1548: * script, there's not much point in executing the
1549: * shell, is there?
1550: */
1551: if (numCommands == 0) {
1552: noExec = true;
1553: }
1554: }
1555: } else if (noExecute) {
1556: /*
1557: * Not executing anything -- just print all the commands to
1558: * stdout in one fell swoop. This will still set up
1559: * job->tailCmds correctly.
1560: */
1561: if (lastNode != gn) {
1562: MESSAGE(stdout, gn);
1563: lastNode = gn;
1564: }
1565: job->cmdFILE = stdout;
1566: /*
1567: * Only print the commands if they're ok, but don't die if
1568: * they're not -- just let the user know they're bad and keep
1569: * going. It doesn't do any harm in this case and may do some
1570: * good.
1571: */
1572: if (cmdsOK) {
1.68 espie 1573: Lst_ForEachNodeWhile(&gn->commands, JobPrintCommand,
1.66 espie 1574: job);
1575: }
1576: /*
1577: * Don't execute the shell, thank you.
1578: */
1.41 espie 1579: noExec = true;
1.66 espie 1580: } else {
1581: /*
1582: * Just touch the target and note that no shell should be
1583: * executed. Set cmdFILE to stdout to make life easier. Check
1584: * the commands, too, but don't die if they're no good -- it
1585: * does no harm to keep working up the graph.
1.30 espie 1586: */
1.66 espie 1587: job->cmdFILE = stdout;
1588: Job_Touch(gn, job->flags&JOB_SILENT);
1.41 espie 1589: noExec = true;
1.1 deraadt 1590: }
1.66 espie 1591:
1.1 deraadt 1592: /*
1.66 espie 1593: * If we're not supposed to execute a shell, don't.
1.1 deraadt 1594: */
1.66 espie 1595: if (noExec) {
1596: /*
1597: * Unlink and close the command file if we opened one
1598: */
1599: if (job->cmdFILE != stdout) {
1600: (void)eunlink(tfile);
1601: if (job->cmdFILE != NULL)
1602: (void)fclose(job->cmdFILE);
1603: } else {
1604: (void)fflush(stdout);
1605: }
1.1 deraadt 1606:
1.66 espie 1607: /*
1608: * We only want to work our way up the graph if we aren't here
1609: * because the commands for the job were no good.
1610: */
1611: if (cmdsOK) {
1612: if (aborting == 0) {
1.68 espie 1613: Lst_ForEachFrom(job->tailCmds, JobSaveCommand,
1.66 espie 1614: job->node);
1615: Make_Update(job->node);
1616: }
1617: free(job);
1618: return JOB_FINISHED;
1619: } else {
1620: free(job);
1621: return JOB_ERROR;
1622: }
1.1 deraadt 1623: } else {
1.66 espie 1624: (void)fflush(job->cmdFILE);
1625: (void)eunlink(tfile);
1.1 deraadt 1626: }
1627:
1628: /*
1.66 espie 1629: * Set up the control arguments to the shell. This is based on the flags
1630: * set earlier for this job.
1.1 deraadt 1631: */
1.66 espie 1632: JobMakeArgv(job, argv);
1.1 deraadt 1633:
1.66 espie 1634: /*
1635: * If we're using pipes to catch output, create the pipe by which we'll
1636: * get the shell's output. If we're using files, print out that we're
1637: * starting a job and then set up its temporary-file name.
1638: */
1639: if (!compatMake || (job->flags & JOB_FIRST)) {
1640: if (usePipes) {
1641: int fd[2];
1642: if (pipe(fd) == -1)
1643: Punt("Cannot create pipe: %s", strerror(errno));
1644: job->inPipe = fd[0];
1645: job->outPipe = fd[1];
1646: (void)fcntl(job->inPipe, F_SETFD, 1);
1647: (void)fcntl(job->outPipe, F_SETFD, 1);
1648: } else {
1649: (void)fprintf(stdout, "Remaking `%s'\n", gn->name);
1650: (void)fflush(stdout);
1.68 espie 1651: (void)strlcpy(job->outFile, TMPPAT,
1.66 espie 1652: sizeof(job->outFile));
1653: if ((job->outFd = mkstemp(job->outFile)) == -1)
1.68 espie 1654: Punt("Cannot create temp file: %s",
1.66 espie 1655: strerror(errno));
1656: (void)fcntl(job->outFd, F_SETFD, 1);
1657: }
1.1 deraadt 1658: }
1659:
1.41 espie 1660: local = true;
1.1 deraadt 1661:
1.66 espie 1662: if (local && nLocal >= maxLocal &&
1663: !(job->flags & JOB_SPECIAL) &&
1664: maxLocal != 0
1665: ) {
1666: /*
1667: * The job can only be run locally, but we've hit the limit of
1668: * local concurrency, so put the job on hold until some other
1669: * job finishes. Note that the special jobs (.BEGIN, .INTERRUPT
1670: * and .END) may be run locally even when the local limit has
1671: * been reached (e.g. when maxLocal == 0), though they will be
1672: * exported if at all possible. In addition, any target marked
1673: * with .NOEXPORT will be run locally if maxLocal is 0.
1674: */
1675: jobFull = true;
1.6 millert 1676:
1.66 espie 1677: if (DEBUG(JOB)) {
1678: (void)fprintf(stdout, "Can only run job locally.\n");
1679: (void)fflush(stdout);
1680: }
1681: job->flags |= JOB_RESTART;
1682: Lst_AtEnd(&stoppedJobs, job);
1683: } else {
1684: if (nLocal >= maxLocal && local) {
1685: /*
1686: * If we're running this job locally as a special case
1687: * (see above), at least say the table is full.
1688: */
1689: jobFull = true;
1690: if (DEBUG(JOB)) {
1.68 espie 1691: (void)fprintf(stdout,
1.66 espie 1692: "Local job queue is full.\n");
1693: (void)fflush(stdout);
1694: }
1695: }
1696: JobExec(job, argv);
1.1 deraadt 1697: }
1.66 espie 1698: return JOB_RUNNING;
1.1 deraadt 1699: }
1700:
1.6 millert 1701: static char *
1.56 espie 1702: JobOutput(Job *job, char *cp, char *endp, int msg)
1.2 deraadt 1703: {
1.66 espie 1704: char *ecp;
1.2 deraadt 1705:
1.66 espie 1706: if (commandShell->noPrint) {
1707: ecp = strstr(cp, commandShell->noPrint);
1708: while (ecp != NULL) {
1709: if (cp != ecp) {
1710: *ecp = '\0';
1711: if (msg && job->node != lastNode) {
1712: MESSAGE(stdout, job->node);
1713: lastNode = job->node;
1714: }
1715: /*
1716: * The only way there wouldn't be a newline
1717: * after this line is if it were the last in
1718: * the buffer. however, since the
1719: * non-printable comes after it, there must be
1720: * a newline, so we don't print one.
1721: */
1722: (void)fprintf(stdout, "%s", cp);
1723: (void)fflush(stdout);
1724: }
1725: cp = ecp + commandShell->noPLen;
1726: if (cp != endp) {
1727: /*
1728: * Still more to print, look again after
1729: * skipping the whitespace following the
1730: * non-printable command....
1731: */
1732: cp++;
1.68 espie 1733: while (*cp == ' ' || *cp == '\t' ||
1.66 espie 1734: *cp == '\n') {
1735: cp++;
1736: }
1737: ecp = strstr(cp, commandShell->noPrint);
1738: } else {
1739: return cp;
1740: }
1.2 deraadt 1741: }
1742: }
1.66 espie 1743: return cp;
1.2 deraadt 1744: }
1745:
1.1 deraadt 1746: /*-
1747: *-----------------------------------------------------------------------
1.40 espie 1748: * JobDoOutput --
1.1 deraadt 1749: * This function is called at different times depending on
1750: * whether the user has specified that output is to be collected
1751: * via pipes or temporary files. In the former case, we are called
1752: * whenever there is something to read on the pipe. We collect more
1753: * output from the given job and store it in the job's outBuf. If
1754: * this makes up a line, we print it tagged by the job's identifier,
1755: * as necessary.
1756: * If output has been collected in a temporary file, we open the
1757: * file and read it line by line, transfering it to our own
1758: * output channel until the file is empty. At which point we
1759: * remove the temporary file.
1760: * In both cases, however, we keep our figurative eye out for the
1761: * 'noPrint' line for the shell from which the output came. If
1762: * we recognize a line, we don't print it. If the command is not
1.6 millert 1763: * alone on the line (the character after it is not \0 or \n), we
1.1 deraadt 1764: * do print whatever follows it.
1765: *
1766: * Side Effects:
1767: * curPos may be shifted as may the contents of outBuf.
1768: *-----------------------------------------------------------------------
1769: */
1.48 espie 1770: static void
1.66 espie 1771: JobDoOutput(Job *job, /* the job whose output needs printing */
1772: bool finish) /* true if this is the last time we'll be
1773: * called for this job */
1774: {
1775: bool gotNL = false; /* true if got a newline */
1776: bool fbuf; /* true if our buffer filled up */
1777: int nr; /* number of bytes read */
1778: int i; /* auxiliary index into outBuf */
1779: int max; /* limit for i (end of current data) */
1780: int nRead; /* (Temporary) number of bytes read */
1.1 deraadt 1781:
1.66 espie 1782: FILE *oFILE; /* Stream pointer to shell's output file */
1783: char inLine[132];
1.1 deraadt 1784:
1.6 millert 1785:
1.66 espie 1786: if (usePipes) {
1787: /*
1788: * Read as many bytes as will fit in the buffer.
1789: */
1.1 deraadt 1790: end_loop:
1.66 espie 1791: gotNL = false;
1792: fbuf = false;
1.6 millert 1793:
1.66 espie 1794: nRead = read(job->inPipe, &job->outBuf[job->curPos],
1795: JOB_BUFSIZE - job->curPos);
1796: if (nRead == -1) {
1797: if (DEBUG(JOB)) {
1798: perror("JobDoOutput(piperead)");
1799: }
1800: nr = 0;
1801: } else {
1802: nr = nRead;
1803: }
1.1 deraadt 1804:
1.66 espie 1805: /*
1806: * If we hit the end-of-file (the job is dead), we must flush
1807: * its remaining output, so pretend we read a newline if
1808: * there's any output remaining in the buffer. Also clear the
1809: * 'finish' flag so we stop looping.
1810: */
1811: if (nr == 0 && job->curPos != 0) {
1812: job->outBuf[job->curPos] = '\n';
1813: nr = 1;
1814: finish = false;
1815: } else if (nr == 0) {
1816: finish = false;
1817: }
1.6 millert 1818:
1.1 deraadt 1819: /*
1.66 espie 1820: * Look for the last newline in the bytes we just got. If there
1821: * is one, break out of the loop with 'i' as its index and
1822: * gotNL set true.
1.1 deraadt 1823: */
1.66 espie 1824: max = job->curPos + nr;
1825: for (i = job->curPos + nr - 1; i >= job->curPos; i--) {
1826: if (job->outBuf[i] == '\n') {
1827: gotNL = true;
1828: break;
1829: } else if (job->outBuf[i] == '\0') {
1830: /*
1831: * Why?
1832: */
1833: job->outBuf[i] = ' ';
1834: }
1835: }
1.6 millert 1836:
1.66 espie 1837: if (!gotNL) {
1838: job->curPos += nr;
1839: if (job->curPos == JOB_BUFSIZE) {
1840: /*
1841: * If we've run out of buffer space, we have no
1842: * choice but to print the stuff. sigh.
1843: */
1844: fbuf = true;
1845: i = job->curPos;
1846: }
1847: }
1848: if (gotNL || fbuf) {
1849: /*
1850: * Need to send the output to the screen. Null
1851: * terminate it first, overwriting the newline
1852: * character if there was one. So long as the line
1853: * isn't one we should filter (according to the shell
1854: * description), we print the line, preceded by a
1855: * target banner if this target isn't the same as the
1856: * one for which we last printed something. The rest
1857: * of the data in the buffer are then shifted down to
1858: * the start of the buffer and curPos is set
1859: * accordingly.
1860: */
1861: job->outBuf[i] = '\0';
1862: if (i >= job->curPos) {
1863: char *cp;
1864:
1.68 espie 1865: cp = JobOutput(job, job->outBuf,
1.66 espie 1866: &job->outBuf[i], false);
1867:
1868: /*
1869: * There's still more in that thar buffer. This
1870: * time, though, we know there's no newline at
1871: * the end, so we add one of our own free will.
1872: */
1873: if (*cp != '\0') {
1874: if (job->node != lastNode) {
1875: MESSAGE(stdout, job->node);
1876: lastNode = job->node;
1877: }
1.68 espie 1878: (void)fprintf(stdout, "%s%s", cp,
1.66 espie 1879: gotNL ? "\n" : "");
1880: (void)fflush(stdout);
1881: }
1882: }
1883: if (i < max - 1) {
1884: /* shift the remaining characters down */
1.68 espie 1885: (void)memcpy(job->outBuf, &job->outBuf[i + 1],
1.66 espie 1886: max - (i + 1));
1887: job->curPos = max - (i + 1);
1888:
1889: } else {
1890: /*
1891: * We have written everything out, so we just
1892: * start over from the start of the buffer. No
1893: * copying. No nothing.
1894: */
1895: job->curPos = 0;
1896: }
1897: }
1898: if (finish) {
1899: /*
1900: * If the finish flag is true, we must loop until we
1901: * hit end-of-file on the pipe. This is guaranteed to
1902: * happen eventually since the other end of the pipe is
1903: * now closed (we closed it explicitly and the child
1904: * has exited). When we do get an EOF, finish will be
1905: * set false and we'll fall through and out.
1906: */
1907: goto end_loop;
1908: }
1909: } else {
1910: /*
1911: * We've been called to retrieve the output of the job from the
1912: * temporary file where it's been squirreled away. This
1913: * consists of opening the file, reading the output line by
1914: * line, being sure not to print the noPrint line for the shell
1915: * we used, then close and remove the temporary file. Very
1916: * simple.
1917: *
1918: * Change to read in blocks and do FindSubString type things as
1919: * for pipes? That would allow for "@echo -n..."
1.1 deraadt 1920: */
1.66 espie 1921: oFILE = fopen(job->outFile, "r");
1922: if (oFILE != NULL) {
1.68 espie 1923: (void)fprintf(stdout, "Results of making %s:\n",
1.66 espie 1924: job->node->name);
1925: (void)fflush(stdout);
1926: while (fgets(inLine, sizeof(inLine), oFILE) != NULL) {
1927: char *cp, *endp, *oendp;
1928:
1929: cp = inLine;
1930: oendp = endp = inLine + strlen(inLine);
1931: if (endp != inLine && endp[-1] == '\n') {
1932: *--endp = '\0';
1933: }
1934: cp = JobOutput(job, inLine, endp, false);
1935:
1936: /*
1937: * There's still more in that thar buffer. This
1938: * time, though, we know there's no newline at
1939: * the end, so we add one of our own free will.
1940: */
1941: (void)fprintf(stdout, "%s", cp);
1942: (void)fflush(stdout);
1943: if (endp != oendp) {
1944: (void)fprintf(stdout, "\n");
1945: (void)fflush(stdout);
1946: }
1947: }
1948: (void)fclose(oFILE);
1949: (void)eunlink(job->outFile);
1950: }
1.1 deraadt 1951: }
1952: }
1953:
1954: /*-
1955: *-----------------------------------------------------------------------
1956: * Job_CatchChildren --
1957: * Handle the exit of a child. Called from Make_Make.
1958: *
1959: * Side Effects:
1960: * The job descriptor is removed from the list of children.
1961: *
1962: * Notes:
1963: * We do waits, blocking or not, according to the wisdom of our
1964: * caller, until there are no more children to report. For each
1965: * job, call JobFinish to finish things off. This will take care of
1966: * putting jobs on the stoppedJobs queue.
1967: *-----------------------------------------------------------------------
1968: */
1969: void
1.56 espie 1970: Job_CatchChildren(bool block) /* true if should block on the wait. */
1.1 deraadt 1971: {
1.66 espie 1972: pid_t pid; /* pid of dead child */
1973: Job *job; /* job descriptor for dead child */
1974: LstNode jnode; /* list element for finding job */
1975: int status; /* Exit/termination status */
1.1 deraadt 1976:
1.66 espie 1977: /*
1978: * Don't even bother if we know there's no one around.
1979: */
1980: if (nLocal == 0) {
1981: return;
1.2 deraadt 1982: }
1.6 millert 1983:
1.66 espie 1984: while ((pid = waitpid((pid_t) -1, &status,
1985: (block?0:WNOHANG)|WUNTRACED)) > 0) {
1986: HandleSigs();
1987: if (DEBUG(JOB)) {
1.68 espie 1988: (void)fprintf(stdout,
1.66 espie 1989: "Process %ld exited or stopped.\n", (long)pid);
1990: (void)fflush(stdout);
1991: }
1992:
1.1 deraadt 1993:
1.66 espie 1994: jnode = Lst_Find(&jobs, JobCmpPid, &pid);
1.1 deraadt 1995:
1.18 espie 1996: if (jnode == NULL) {
1.68 espie 1997: if (WIFSIGNALED(status) &&
1.66 espie 1998: (WTERMSIG(status) == SIGCONT)) {
1999: jnode = Lst_Find(&stoppedJobs, JobCmpPid, &pid);
2000: if (jnode == NULL) {
2001: Error("Resumed child (%ld) not in table", (long)pid);
2002: continue;
2003: }
2004: job = (Job *)Lst_Datum(jnode);
2005: Lst_Remove(&stoppedJobs, jnode);
2006: } else {
2007: Error("Child (%ld) not in table?", (long)pid);
2008: continue;
2009: }
2010: } else {
2011: job = (Job *)Lst_Datum(jnode);
2012: Lst_Remove(&jobs, jnode);
1.67 espie 2013: nJobs--;
1.66 espie 2014: if (jobFull && DEBUG(JOB)) {
1.68 espie 2015: (void)fprintf(stdout,
1.66 espie 2016: "Job queue is no longer full.\n");
2017: (void)fflush(stdout);
2018: }
2019: jobFull = false;
1.67 espie 2020: nLocal--;
1.1 deraadt 2021: }
1.66 espie 2022:
2023: JobFinish(job, &status);
1.1 deraadt 2024: }
2025: }
2026:
2027: /*-
2028: *-----------------------------------------------------------------------
2029: * Job_CatchOutput --
2030: * Catch the output from our children, if we're using
2031: * pipes do so. Otherwise just block time until we get a
1.6 millert 2032: * signal (most likely a SIGCHLD) since there's no point in
1.1 deraadt 2033: * just spinning when there's nothing to do and the reaping
1.6 millert 2034: * of a child can wait for a while.
1.1 deraadt 2035: *
2036: * Side Effects:
2037: * Output is read from pipes if we're piping.
2038: * -----------------------------------------------------------------------
2039: */
2040: void
1.56 espie 2041: Job_CatchOutput(void)
1.1 deraadt 2042: {
1.66 espie 2043: int nfds;
2044: struct timeval timeout;
2045: LstNode ln;
2046: Job *job;
2047:
2048: (void)fflush(stdout);
2049: if (usePipes) {
2050: int count = howmany(outputsn+1, NFDBITS) * sizeof(fd_mask);
2051: fd_set *readfdsp = malloc(count);
2052: if (readfdsp == NULL)
2053: return;
2054:
2055: memcpy(readfdsp, outputsp, count);
2056: timeout.tv_sec = SEL_SEC;
2057: timeout.tv_usec = SEL_USEC;
2058:
2059: if ((nfds = select(outputsn+1, readfdsp, (fd_set *) 0,
2060: (fd_set *) 0, &timeout)) <= 0) {
2061: HandleSigs();
2062: free(readfdsp);
2063: return;
2064: } else {
2065: HandleSigs();
1.68 espie 2066: for (ln = Lst_First(&jobs); nfds && ln != NULL;
1.66 espie 2067: ln = Lst_Adv(ln)) {
2068: job = (Job *)Lst_Datum(ln);
2069: if (FD_ISSET(job->inPipe, readfdsp)) {
2070: JobDoOutput(job, false);
1.67 espie 2071: nfds--;
1.66 espie 2072: }
2073: }
1.1 deraadt 2074: }
1.66 espie 2075: free(readfdsp);
1.1 deraadt 2076: }
2077: }
2078:
2079: /*-
2080: *-----------------------------------------------------------------------
2081: * Job_Make --
2082: * Start the creation of a target. Basically a front-end for
2083: * JobStart used by the Make module.
2084: *
2085: * Side Effects:
2086: * Another job is started.
2087: *-----------------------------------------------------------------------
2088: */
2089: void
1.56 espie 2090: Job_Make(GNode *gn)
1.1 deraadt 2091: {
1.66 espie 2092: (void)JobStart(gn, 0, NULL);
1.1 deraadt 2093: }
2094:
2095: /*-
2096: *-----------------------------------------------------------------------
2097: * Job_Init --
2098: * Initialize the process module
2099: *
2100: * Side Effects:
2101: * lists and counters are initialized
2102: *-----------------------------------------------------------------------
2103: */
2104: void
1.56 espie 2105: Job_Init(int maxproc, /* the greatest number of jobs which may be
1.1 deraadt 2106: * running at one time */
1.56 espie 2107: int maxlocal) /* the greatest number of local jobs which may
1.1 deraadt 2108: * be running at once. */
2109: {
1.66 espie 2110: GNode *begin; /* node for commands to do at the very start */
2111: int tfd;
2112:
2113: (void)strlcpy(tfile, TMPPAT, sizeof(tfile));
2114: if ((tfd = mkstemp(tfile)) == -1)
2115: Punt("Cannot create temp file: %s", strerror(errno));
2116: else
2117: (void)close(tfd);
2118:
2119: Static_Lst_Init(&jobs);
2120: Static_Lst_Init(&stoppedJobs);
2121: maxJobs = maxproc;
2122: maxLocal = maxlocal;
2123: nJobs = 0;
2124: nLocal = 0;
2125: jobFull = false;
2126:
2127: aborting = 0;
2128: errors = 0;
1.40 espie 2129:
1.66 espie 2130: lastNode = NULL;
1.1 deraadt 2131:
1.66 espie 2132: if (maxJobs == 1) {
2133: /*
2134: * If only one job can run at a time, there's no need for a
2135: * banner, no is there?
2136: */
2137: targFmt = "";
2138: } else {
2139: targFmt = TARG_FMT;
2140: }
2141:
2142: if (commandShell->exit == NULL) {
2143: commandShell->exit = "";
2144: }
2145: if (commandShell->echo == NULL) {
2146: commandShell->echo = "";
2147: }
1.1 deraadt 2148:
2149: /*
1.66 espie 2150: * Catch the four signals that POSIX specifies if they aren't ignored.
2151: * JobPassSig will take care of calling JobInterrupt if appropriate.
1.1 deraadt 2152: */
1.66 espie 2153: if (signal(SIGINT, SIG_IGN) != SIG_IGN) {
2154: (void)signal(SIGINT, SigHandler);
2155: }
2156: if (signal(SIGHUP, SIG_IGN) != SIG_IGN) {
2157: (void)signal(SIGHUP, SigHandler);
2158: }
2159: if (signal(SIGQUIT, SIG_IGN) != SIG_IGN) {
2160: (void)signal(SIGQUIT, SigHandler);
2161: }
2162: if (signal(SIGTERM, SIG_IGN) != SIG_IGN) {
2163: (void)signal(SIGTERM, SigHandler);
2164: }
1.1 deraadt 2165: /*
1.66 espie 2166: * There are additional signals that need to be caught and passed if
2167: * either the export system wants to be told directly of signals or if
2168: * we're giving each job its own process group (since then it won't get
2169: * signals from the terminal driver as we own the terminal)
1.1 deraadt 2170: */
1.48 espie 2171: #if defined(USE_PGRP)
1.66 espie 2172: if (signal(SIGTSTP, SIG_IGN) != SIG_IGN) {
2173: (void)signal(SIGTSTP, SigHandler);
2174: }
2175: if (signal(SIGTTOU, SIG_IGN) != SIG_IGN) {
2176: (void)signal(SIGTTOU, SigHandler);
2177: }
2178: if (signal(SIGTTIN, SIG_IGN) != SIG_IGN) {
2179: (void)signal(SIGTTIN, SigHandler);
2180: }
2181: if (signal(SIGWINCH, SIG_IGN) != SIG_IGN) {
2182: (void)signal(SIGWINCH, SigHandler);
2183: }
1.1 deraadt 2184: #endif
1.6 millert 2185:
1.66 espie 2186: begin = Targ_FindNode(".BEGIN", TARG_NOCREATE);
1.1 deraadt 2187:
1.66 espie 2188: if (begin != NULL) {
2189: JobStart(begin, JOB_SPECIAL, (Job *)0);
2190: while (nJobs) {
2191: Job_CatchOutput();
2192: Job_CatchChildren(!usePipes);
2193: }
1.1 deraadt 2194: }
1.66 espie 2195: postCommands = Targ_FindNode(".END", TARG_CREATE);
1.1 deraadt 2196: }
2197:
2198: /*-
2199: *-----------------------------------------------------------------------
2200: * Job_Full --
2201: * See if the job table is full. It is considered full if it is OR
2202: * if we are in the process of aborting OR if we have
2203: * reached/exceeded our local quota. This prevents any more jobs
2204: * from starting up.
2205: *
2206: * Results:
1.41 espie 2207: * true if the job table is full, false otherwise
1.1 deraadt 2208: *-----------------------------------------------------------------------
2209: */
1.41 espie 2210: bool
1.56 espie 2211: Job_Full(void)
1.1 deraadt 2212: {
1.66 espie 2213: return aborting || jobFull;
1.1 deraadt 2214: }
2215:
2216: /*-
2217: *-----------------------------------------------------------------------
2218: * Job_Empty --
1.40 espie 2219: * See if the job table is empty. Because the local concurrency may
1.1 deraadt 2220: * be set to 0, it is possible for the job table to become empty,
2221: * while the list of stoppedJobs remains non-empty. In such a case,
2222: * we want to restart as many jobs as we can.
2223: *
2224: * Results:
1.41 espie 2225: * true if it is. false if it ain't.
1.1 deraadt 2226: * -----------------------------------------------------------------------
2227: */
1.41 espie 2228: bool
1.56 espie 2229: Job_Empty(void)
1.1 deraadt 2230: {
1.66 espie 2231: if (nJobs == 0) {
2232: if (!Lst_IsEmpty(&stoppedJobs) && !aborting) {
2233: /*
2234: * The job table is obviously not full if it has no
2235: * jobs in it...Try and restart the stopped jobs.
2236: */
2237: jobFull = false;
2238: JobRestartJobs();
2239: return false;
2240: } else {
2241: return true;
2242: }
1.1 deraadt 2243: } else {
1.66 espie 2244: return false;
1.1 deraadt 2245: }
2246: }
2247:
2248: /*-
2249: *-----------------------------------------------------------------------
2250: * JobInterrupt --
2251: * Handle the receipt of an interrupt.
2252: *
2253: * Side Effects:
2254: * All children are killed. Another job will be started if the
2255: * .INTERRUPT target was given.
2256: *-----------------------------------------------------------------------
2257: */
2258: static void
1.56 espie 2259: JobInterrupt(int runINTERRUPT, /* Non-zero if commands for the .INTERRUPT
1.1 deraadt 2260: * target should be executed */
1.66 espie 2261: int signo) /* signal received */
1.1 deraadt 2262: {
1.66 espie 2263: LstNode ln; /* element in job table */
2264: Job *job; /* job descriptor in that element */
2265: GNode *interrupt; /* the node describing the .INTERRUPT target */
2266:
2267: aborting = ABORT_INTERRUPT;
2268:
2269: for (ln = Lst_First(&jobs); ln != NULL; ln = Lst_Adv(ln)) {
2270: job = (Job *)Lst_Datum(ln);
2271:
2272: if (!Targ_Precious(job->node)) {
2273: const char *file = job->node->path == NULL ?
2274: job->node->name : job->node->path;
2275: if (!noExecute && eunlink(file) != -1) {
2276: Error("*** %s removed", file);
2277: }
2278: }
2279: if (job->pid) {
2280: if (DEBUG(JOB)) {
2281: (void)fprintf(stdout,
2282: "JobInterrupt passing signal to child %ld.\n",
2283: (long)job->pid);
2284: (void)fflush(stdout);
2285: }
2286: KILL(job->pid, signo);
2287: }
1.2 deraadt 2288: }
1.1 deraadt 2289:
1.66 espie 2290: if (runINTERRUPT && !touchFlag) {
2291: interrupt = Targ_FindNode(".INTERRUPT", TARG_NOCREATE);
2292: if (interrupt != NULL) {
2293: ignoreErrors = false;
2294:
2295: JobStart(interrupt, JOB_IGNDOTS, (Job *)0);
2296: while (nJobs) {
2297: Job_CatchOutput();
2298: Job_CatchChildren(!usePipes);
2299: }
2300: }
1.1 deraadt 2301: }
1.66 espie 2302: (void)eunlink(tfile);
2303: exit(signo);
1.1 deraadt 2304: }
2305:
2306: /*
2307: *-----------------------------------------------------------------------
1.12 espie 2308: * Job_Finish --
1.1 deraadt 2309: * Do final processing such as the running of the commands
1.6 millert 2310: * attached to the .END target.
1.1 deraadt 2311: *
2312: * Results:
2313: * Number of errors reported.
1.40 espie 2314: *
2315: * Side Effects:
2316: * The process' temporary file (tfile) is removed if it still
2317: * existed.
1.1 deraadt 2318: *-----------------------------------------------------------------------
2319: */
2320: int
1.56 espie 2321: Job_Finish(void)
1.1 deraadt 2322: {
1.66 espie 2323: if (postCommands != NULL && !Lst_IsEmpty(&postCommands->commands)) {
2324: if (errors) {
2325: Error("Errors reported so .END ignored");
2326: } else {
2327: JobStart(postCommands, JOB_SPECIAL | JOB_IGNDOTS, NULL);
1.1 deraadt 2328:
1.66 espie 2329: while (nJobs) {
2330: Job_CatchOutput();
2331: Job_CatchChildren(!usePipes);
2332: }
2333: }
1.1 deraadt 2334: }
1.66 espie 2335: (void)eunlink(tfile);
2336: return errors;
1.1 deraadt 2337: }
2338:
1.12 espie 2339: /*-
2340: *-----------------------------------------------------------------------
2341: * Job_End --
2342: * Cleanup any memory used by the jobs module
2343: *
2344: * Side Effects:
2345: * Memory is freed
2346: *-----------------------------------------------------------------------
2347: */
1.41 espie 2348: #ifdef CLEANUP
1.12 espie 2349: void
1.56 espie 2350: Job_End(void)
1.12 espie 2351: {
1.66 espie 2352: efree(shellArgv);
1.41 espie 2353: }
1.13 espie 2354: #endif
1.40 espie 2355:
1.1 deraadt 2356: /*-
2357: *-----------------------------------------------------------------------
2358: * Job_Wait --
2359: * Waits for all running jobs to finish and returns. Sets 'aborting'
2360: * to ABORT_WAIT to prevent other jobs from starting.
2361: *
2362: * Side Effects:
2363: * Currently running jobs finish.
2364: *
2365: *-----------------------------------------------------------------------
2366: */
2367: void
1.56 espie 2368: Job_Wait(void)
1.1 deraadt 2369: {
1.66 espie 2370: aborting = ABORT_WAIT;
2371: while (nJobs != 0) {
2372: Job_CatchOutput();
2373: Job_CatchChildren(!usePipes);
2374: }
2375: aborting = 0;
1.1 deraadt 2376: }
2377:
2378: /*-
2379: *-----------------------------------------------------------------------
2380: * Job_AbortAll --
2381: * Abort all currently running jobs without handling output or anything.
2382: * This function is to be called only in the event of a major
2383: * error. Most definitely NOT to be called from JobInterrupt.
2384: *
2385: * Side Effects:
2386: * All children are killed, not just the firstborn
2387: *-----------------------------------------------------------------------
2388: */
2389: void
1.56 espie 2390: Job_AbortAll(void)
1.1 deraadt 2391: {
1.66 espie 2392: LstNode ln; /* element in job table */
2393: Job *job; /* the job descriptor in that element */
2394: int foo;
1.6 millert 2395:
1.66 espie 2396: aborting = ABORT_ERROR;
1.6 millert 2397:
1.66 espie 2398: if (nJobs) {
2399: for (ln = Lst_First(&jobs); ln != NULL; ln = Lst_Adv(ln)) {
2400: job = (Job *)Lst_Datum(ln);
2401:
2402: /*
2403: * kill the child process with increasingly drastic
2404: * signals to make darn sure it's dead.
2405: */
2406: KILL(job->pid, SIGINT);
2407: KILL(job->pid, SIGKILL);
2408: }
1.1 deraadt 2409: }
1.6 millert 2410:
1.66 espie 2411: /*
2412: * Catch as many children as want to report in at first, then give up
2413: */
2414: while (waitpid(-1, &foo, WNOHANG) > 0)
2415: continue;
2416: (void)eunlink(tfile);
1.2 deraadt 2417: }
1.40 espie 2418:
1.2 deraadt 2419: /*-
2420: *-----------------------------------------------------------------------
2421: * JobRestartJobs --
2422: * Tries to restart stopped jobs if there are slots available.
2423: * Note that this tries to restart them regardless of pending errors.
2424: * It's not good to leave stopped jobs lying around!
2425: *
2426: * Side Effects:
2427: * Resumes(and possibly migrates) jobs.
2428: *-----------------------------------------------------------------------
2429: */
2430: static void
1.56 espie 2431: JobRestartJobs(void)
1.2 deraadt 2432: {
1.66 espie 2433: Job *job;
1.19 espie 2434:
1.66 espie 2435: while (!jobFull && (job = (Job *)Lst_DeQueue(&stoppedJobs)) != NULL) {
2436: if (DEBUG(JOB)) {
2437: (void)fprintf(stdout,
2438: "Job queue is not full. Restarting a stopped job.\n");
2439: (void)fflush(stdout);
2440: }
2441: JobRestart(job);
1.2 deraadt 2442: }
1.1 deraadt 2443: }
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