Annotation of src/usr.bin/make/job.c, Revision 1.78
1.40 espie 1: /* $OpenPackages$ */
1.78 ! espie 2: /* $OpenBSD: job.c,v 1.74 2007/09/17 10:37:08 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.
51: *
52: * Job_CatchOutput Print any output our children have produced.
53: * Should also be called fairly frequently to
54: * keep the user informed of what's going on.
55: * If no output is waiting, it will block for
56: * a time given by the SEL_* constants, below,
57: * or until output is ready.
58: *
1.53 jmc 59: * Job_Init Called to initialize this module. in addition,
1.40 espie 60: * any commands attached to the .BEGIN target
61: * are executed before this function returns.
62: * Hence, the makefile must have been parsed
63: * before this function is called.
64: *
65: * Job_End Cleanup any memory used.
66: *
1.41 espie 67: * Job_Full Return true if the job table is filled.
1.40 espie 68: *
1.41 espie 69: * Job_Empty Return true if the job table is completely
1.40 espie 70: * empty.
71: *
72: * Job_Finish Perform any final processing which needs doing.
73: * This includes the execution of any commands
74: * which have been/were attached to the .END
75: * target. It should only be called when the
76: * job table is empty.
77: *
78: * Job_AbortAll Abort all currently running jobs. It doesn't
79: * handle output or do anything for the jobs,
80: * just kills them. It should only be called in
81: * an emergency, as it were.
1.1 deraadt 82: *
1.40 espie 83: * Job_Wait Wait for all currently-running jobs to finish.
1.1 deraadt 84: */
85:
86: #include <sys/types.h>
87: #include <sys/wait.h>
1.41 espie 88: #include <ctype.h>
89: #include <errno.h>
1.1 deraadt 90: #include <fcntl.h>
1.41 espie 91: #include <signal.h>
1.69 espie 92: #include <stdarg.h>
1.1 deraadt 93: #include <stdio.h>
1.42 espie 94: #include <stdlib.h>
1.1 deraadt 95: #include <string.h>
1.41 espie 96: #include <unistd.h>
97: #include "config.h"
98: #include "defines.h"
1.1 deraadt 99: #include "job.h"
1.63 espie 100: #include "engine.h"
1.1 deraadt 101: #include "pathnames.h"
1.41 espie 102: #include "var.h"
103: #include "targ.h"
104: #include "error.h"
105: #include "lst.h"
106: #include "extern.h"
107: #include "gnode.h"
108: #include "memory.h"
109: #include "make.h"
110:
1.50 espie 111: #define TMPPAT "/tmp/makeXXXXXXXXXX"
112:
113: /*
114: * The SEL_ constants determine the maximum amount of time spent in select
115: * before coming out to see if a child has finished. SEL_SEC is the number of
116: * seconds and SEL_USEC is the number of micro-seconds
117: */
118: #define SEL_SEC 0
119: #define SEL_USEC 500000
120:
121:
122: /*-
123: * Job Table definitions.
124: *
125: * Each job has several things associated with it:
126: * 1) The process id of the child shell
127: * 2) The graph node describing the target being made by this job
128: * 3) A LstNode for the first command to be saved after the job
129: * completes. This is NULL if there was no "..." in the job's
130: * commands.
131: * 4) An FILE* for writing out the commands. This is only
132: * used before the job is actually started.
1.78 ! espie 133: * 5) Things used for handling the shell's output.
1.76 espie 134: * the output is being caught via a pipe and
1.50 espie 135: * the descriptors of our pipe, an array in which output is line
136: * buffered and the current position in that buffer are all
1.78 ! espie 137: * maintained for each job.
1.50 espie 138: * 6) An identifier provided by and for the exclusive use of the
139: * Rmt module.
140: * 7) A word of flags which determine how the module handles errors,
141: * echoing, etc. for the job
142: *
143: * The job "table" is kept as a linked Lst in 'jobs', with the number of
144: * active jobs maintained in the 'nJobs' variable. At no time will this
145: * exceed the value of 'maxJobs', initialized by the Job_Init function.
146: *
147: * When a job is finished, the Make_Update function is called on each of the
148: * parents of the node which was just remade. This takes care of the upward
149: * traversal of the dependency graph.
150: */
151: #define JOB_BUFSIZE 1024
152: typedef struct Job_ {
1.51 mpech 153: pid_t pid; /* The child's process ID */
1.50 espie 154: GNode *node; /* The target the child is making */
155: LstNode tailCmds; /* The node of the first command to be
156: * saved when the job has been run */
157: FILE *cmdFILE; /* When creating the shell script, this is
158: * where the commands go */
159: int rmtID; /* ID returned from Rmt module */
160: short flags; /* Flags to control treatment of job */
161: #define JOB_IGNERR 0x001 /* Ignore non-zero exits */
162: #define JOB_SILENT 0x002 /* no output */
1.78 ! espie 163: #define JOB_SPECIAL 0x004 /* Target is a special one. i.e., always run */
! 164: /* it even when the table is full */
! 165: #define JOB_IGNDOTS 0x008 /* Ignore "..." lines when processing */
! 166: /* commands */
1.50 espie 167: #define JOB_FIRST 0x020 /* Job is first job for the node */
168: #define JOB_RESTART 0x080 /* Job needs to be completely restarted */
1.78 ! espie 169: #define JOB_RESUME 0x100 /* Job needs to be resumed b/c it stopped, */
! 170: /* for some reason */
! 171: #define JOB_CONTINUING 0x200 /* We are in the process of resuming this job */
! 172: /* Used to avoid infinite recursion between */
! 173: /* JobFinish and JobRestart */
1.76 espie 174: int inPipe; /* Input side of pipe associated
175: * with job's output channel */
176: int outPipe; /* Output side of pipe associated with
177: * job's output channel */
178: char outBuf[JOB_BUFSIZE + 1];
179: /* Buffer for storing the output of the
180: * job, line by line */
181: int curPos; /* Current position in op_outBuf */
1.50 espie 182: } Job;
183:
1.78 ! espie 184:
1.1 deraadt 185: /*
1.6 millert 186: * error handling variables
1.1 deraadt 187: */
1.40 espie 188: static int errors = 0; /* number of errors reported */
189: static int aborting = 0; /* why is the make aborting? */
190: #define ABORT_ERROR 1 /* Because of an error */
191: #define ABORT_INTERRUPT 2 /* Because it was interrupted */
192: #define ABORT_WAIT 3 /* Waiting for jobs to finish */
1.1 deraadt 193:
1.6 millert 194: /*
1.2 deraadt 195: * XXX: Avoid SunOS bug... FILENO() is fp->_file, and file
196: * is a char! So when we go above 127 we turn negative!
197: */
198: #define FILENO(a) ((unsigned) fileno(a))
1.1 deraadt 199:
1.40 espie 200: static int numCommands; /* The number of commands actually printed
1.1 deraadt 201: * for a target. Should this number be
202: * 0, no shell will be executed. */
203:
204: /*
205: * Return values from JobStart.
206: */
1.40 espie 207: #define JOB_RUNNING 0 /* Job is running */
208: #define JOB_ERROR 1 /* Error in starting the job */
209: #define JOB_FINISHED 2 /* The job is already finished */
210: #define JOB_STOPPED 3 /* The job is stopped */
1.1 deraadt 211:
212: /*
1.40 espie 213: * tfile is the name of a file into which all shell commands are put. It is
214: * used over by removing it before the child shell is executed. The XXXXXXXXXX
215: * in the string are replaced by mkstemp(3).
1.1 deraadt 216: */
1.40 espie 217: static char tfile[sizeof(TMPPAT)];
1.1 deraadt 218:
219:
1.70 espie 220: #define SHELL_ECHO_OFF "set -"
221: #define SHELL_ECHO_ON "set -v"
222: #define SHELL_ERROR_ON "set -e"
223: #define SHELL_ERROR_OFF "set +e"
224: #define SHELL_ECHO_FLAG "v"
225: #define SHELL_ERROR_FLAG "e"
1.1 deraadt 226:
1.70 espie 227: static const char *shellPath = _PATH_BSHELL;
228: static const char *shellName = "sh";
1.1 deraadt 229:
1.78 ! espie 230:
1.40 espie 231: static int maxJobs; /* The most children we can run at once */
1.48 espie 232: static int nJobs = 0; /* The number of children currently running */
233: static LIST jobs; /* The structures that describe them */
1.78 ! espie 234: static bool jobFull; /* Flag to tell when the job table is full. */
1.40 espie 235: static fd_set *outputsp; /* Set of descriptors of pipes connected to
1.1 deraadt 236: * the output channels of children */
1.8 deraadt 237: static int outputsn;
1.48 espie 238: static GNode *lastNode; /* The node for which output was most recently
1.1 deraadt 239: * produced. */
1.48 espie 240: static char *targFmt; /* Format string to use to head output from a
1.1 deraadt 241: * job when it's not the most-recent job heard
242: * from */
1.2 deraadt 243:
244: # define TARG_FMT "--- %s ---\n" /* Default format */
245: # define MESSAGE(fp, gn) \
1.40 espie 246: (void)fprintf(fp, targFmt, gn->name);
1.1 deraadt 247:
248: /*
1.50 espie 249: * When JobStart attempts to run a job but isn't allowed to,
250: * the job is placed on the stoppedJobs queue to be run
1.6 millert 251: * when the next job finishes.
1.1 deraadt 252: */
1.48 espie 253: static LIST stoppedJobs; /* Lst of Job structures describing
1.1 deraadt 254: * jobs that were stopped due to concurrency
255: * limits or migration home */
256:
257:
258: #if defined(USE_PGRP) && defined(SYSV)
1.40 espie 259: # define KILL(pid, sig) killpg(-(pid), (sig))
1.1 deraadt 260: #else
261: # if defined(USE_PGRP)
1.2 deraadt 262: # define KILL(pid, sig) killpg((pid), (sig))
1.1 deraadt 263: # else
1.2 deraadt 264: # define KILL(pid, sig) kill((pid), (sig))
1.1 deraadt 265: # endif
266: #endif
267:
1.6 millert 268: /*
1.2 deraadt 269: * Grmpf... There is no way to set bits of the wait structure
270: * anymore with the stupid W*() macros. I liked the union wait
271: * stuff much more. So, we devise our own macros... This is
272: * really ugly, use dramamine sparingly. You have been warned.
273: */
274: #define W_SETMASKED(st, val, fun) \
275: { \
276: int sh = (int) ~0; \
277: int mask = fun(sh); \
278: \
279: for (sh = 0; ((mask >> sh) & 1) == 0; sh++) \
280: continue; \
281: *(st) = (*(st) & ~mask) | ((val) << sh); \
282: }
283:
284: #define W_SETTERMSIG(st, val) W_SETMASKED(st, val, WTERMSIG)
285: #define W_SETEXITSTATUS(st, val) W_SETMASKED(st, val, WEXITSTATUS)
286:
287:
1.40 espie 288: static void JobCondPassSig(void *, void *);
1.57 espie 289: static void SigHandler(int);
290: static void HandleSigs(void);
1.40 espie 291: static void JobPassSig(int);
292: static int JobCmpPid(void *, void *);
1.60 espie 293: static int JobPrintCommand(LstNode, void *);
1.40 espie 294: static void JobSaveCommand(void *, void *);
295: static void JobClose(Job *);
296: static void JobFinish(Job *, int *);
297: static void JobExec(Job *, char **);
298: static void JobMakeArgv(Job *, char **);
299: static void JobRestart(Job *);
300: static int JobStart(GNode *, int, Job *);
301: static char *JobOutput(Job *, char *, char *, int);
1.41 espie 302: static void JobDoOutput(Job *, bool);
1.40 espie 303: static void JobInterrupt(int, int);
304: static void JobRestartJobs(void);
1.69 espie 305: static void DBPRINTF(Job *, const char *, ...);
1.1 deraadt 306:
1.57 espie 307: static volatile sig_atomic_t got_SIGINT, got_SIGHUP, got_SIGQUIT,
308: got_SIGTERM;
309: #if defined(USE_PGRP)
310: static volatile sig_atomic_t got_SIGTSTP, got_SIGTTOU, got_SIGTTIN,
311: got_SIGWINCH;
312: #endif
313:
314: static void
315: SigHandler(int sig)
316: {
317: switch(sig) {
318: case SIGINT:
319: got_SIGINT++;
320: break;
321: case SIGHUP:
322: got_SIGHUP++;
323: break;
324: case SIGQUIT:
325: got_SIGQUIT++;
326: break;
327: case SIGTERM:
328: got_SIGTERM++;
329: break;
330: #if defined(USE_PGRGP)
331: case SIGTSTP:
332: got_SIGTSTP++;
333: break;
334: case SIGTTOU:
335: got_SIGTTOU++;
336: break;
337: case SIGTTIN:
338: got_SIGTTIN++;
339: break;
340: case SIGWINCH:
341: got_SIGWINCH++;
342: break;
343: #endif
344: }
345: }
346:
347: static void
348: HandleSigs()
349: {
350: if (got_SIGINT) {
351: got_SIGINT=0;
352: JobPassSig(SIGINT);
353: }
354: if (got_SIGHUP) {
355: got_SIGHUP=0;
356: JobPassSig(SIGHUP);
357: }
358: if (got_SIGQUIT) {
359: got_SIGQUIT=0;
360: JobPassSig(SIGQUIT);
361: }
362: if (got_SIGTERM) {
363: got_SIGTERM=0;
364: JobPassSig(SIGTERM);
365: }
366: #if defined(USE_PGRP)
367: if (got_SIGTSTP) {
368: got_SIGTSTP=0;
369: JobPassSig(SIGTSTP);
370: }
371: if (got_SIGTTOU) {
372: got_SIGTTOU=0;
373: JobPassSig(SIGTTOU);
374: }
375: if (got_SIGTTIN) {
376: got_SIGTTIN=0;
377: JobPassSig(SIGTTIN);
378: }
379: if (got_SIGWINCH) {
380: got_SIGWINCH=0;
381: JobPassSig(SIGWINCH);
382: }
383: #endif
384: }
385:
1.1 deraadt 386: /*-
387: *-----------------------------------------------------------------------
388: * JobCondPassSig --
1.50 espie 389: * Pass a signal to a job if USE_PGRP
1.1 deraadt 390: * is defined.
391: *
392: * Side Effects:
393: * None, except the job may bite it.
394: *-----------------------------------------------------------------------
395: */
1.27 espie 396: static void
1.56 espie 397: JobCondPassSig(void *jobp, /* Job to biff */
398: void *signop) /* Signal to send it */
1.1 deraadt 399: {
1.66 espie 400: Job *job = (Job *)jobp;
401: int signo = *(int *)signop;
402: if (DEBUG(JOB)) {
403: (void)fprintf(stdout,
404: "JobCondPassSig passing signal %d to child %ld.\n",
405: signo, (long)job->pid);
406: (void)fflush(stdout);
407: }
408: KILL(job->pid, signo);
1.1 deraadt 409: }
410:
411: /*-
412: *-----------------------------------------------------------------------
413: * JobPassSig --
1.68 espie 414: * Pass a signal to all local jobs if USE_PGRP is defined,
1.50 espie 415: * then die ourselves.
1.1 deraadt 416: *
417: * Side Effects:
418: * We die by the same signal.
419: *-----------------------------------------------------------------------
420: */
421: static void
1.56 espie 422: JobPassSig(int signo) /* The signal number we've received */
1.1 deraadt 423: {
1.66 espie 424: sigset_t nmask, omask;
425: struct sigaction act;
1.6 millert 426:
1.66 espie 427: if (DEBUG(JOB)) {
428: (void)fprintf(stdout, "JobPassSig(%d) called.\n", signo);
429: (void)fflush(stdout);
430: }
431: Lst_ForEach(&jobs, JobCondPassSig, &signo);
432:
433: /*
434: * Deal with proper cleanup based on the signal received. We only run
435: * the .INTERRUPT target if the signal was in fact an interrupt. The
436: * other three termination signals are more of a "get out *now*"
437: * command.
438: */
439: if (signo == SIGINT) {
440: JobInterrupt(true, signo);
441: } else if (signo == SIGHUP || signo == SIGTERM || signo == SIGQUIT) {
442: JobInterrupt(false, signo);
443: }
1.1 deraadt 444:
1.66 espie 445: /*
446: * Leave gracefully if SIGQUIT, rather than core dumping.
447: */
448: if (signo == SIGQUIT) {
449: Finish(0);
450: }
1.6 millert 451:
1.66 espie 452: /*
453: * Send ourselves the signal now we've given the message to everyone
454: * else. Note we block everything else possible while we're getting
455: * the signal. This ensures that all our jobs get continued when we
456: * wake up before we take any other signal.
457: */
458: sigemptyset(&nmask);
459: sigaddset(&nmask, signo);
460: sigprocmask(SIG_SETMASK, &nmask, &omask);
461: memset(&act, 0, sizeof act);
462: act.sa_handler = SIG_DFL;
463: sigemptyset(&act.sa_mask);
464: act.sa_flags = 0;
465: sigaction(signo, &act, NULL);
1.6 millert 466:
1.66 espie 467: if (DEBUG(JOB)) {
468: (void)fprintf(stdout,
469: "JobPassSig passing signal to self, mask = %x.\n",
470: ~0 & ~(1 << (signo-1)));
471: (void)fflush(stdout);
472: }
473: (void)signal(signo, SIG_DFL);
1.1 deraadt 474:
1.66 espie 475: (void)KILL(getpid(), signo);
1.1 deraadt 476:
1.66 espie 477: signo = SIGCONT;
478: Lst_ForEach(&jobs, JobCondPassSig, &signo);
1.1 deraadt 479:
1.66 espie 480: (void)sigprocmask(SIG_SETMASK, &omask, NULL);
481: sigprocmask(SIG_SETMASK, &omask, NULL);
482: act.sa_handler = SigHandler;
483: sigaction(signo, &act, NULL);
1.1 deraadt 484: }
485:
486: /*-
487: *-----------------------------------------------------------------------
488: * JobCmpPid --
489: * Compare the pid of the job with the given pid and return 0 if they
490: * are equal. This function is called from Job_CatchChildren via
491: * Lst_Find to find the job descriptor of the finished job.
492: *
493: * Results:
494: * 0 if the pid's match
495: *-----------------------------------------------------------------------
496: */
497: static int
1.56 espie 498: JobCmpPid(void *job, /* job to examine */
499: void *pid) /* process id desired */
1.1 deraadt 500: {
1.66 espie 501: return *(pid_t *)pid - ((Job *)job)->pid;
1.1 deraadt 502: }
503:
1.69 espie 504: static void
505: DBPRINTF(Job *job, const char *fmt, ...)
506: {
507: va_list va;
508: va_start(va, fmt);
509: if (DEBUG(JOB)) {
510: (void)vfprintf(stdout, fmt, va);
511: fflush(stdout);
512: }
513: vfprintf(job->cmdFILE, fmt, va);
514: va_end(va);
515: }
516:
1.1 deraadt 517: /*-
518: *-----------------------------------------------------------------------
519: * JobPrintCommand --
520: * Put out another command for the given job. If the command starts
521: * with an @ or a - we process it specially. In the former case,
522: * so long as the -s and -n flags weren't given to make, we stick
523: * a shell-specific echoOff command in the script. In the latter,
524: * we ignore errors for the entire job, unless the shell has error
525: * control.
526: * If the command is just "..." we take all future commands for this
527: * job to be commands to be executed once the entire graph has been
528: * made and return non-zero to signal that the end of the commands
1.78 ! espie 529: * was reached. These commands are later attached to the end_node
1.1 deraadt 530: * node and executed by Job_End when all things are done.
1.40 espie 531: * This function is called from JobStart via Lst_Find
1.1 deraadt 532: *
533: * Results:
1.26 espie 534: * Always 1, unless the command was "..."
1.1 deraadt 535: *
536: * Side Effects:
537: * If the command begins with a '-' and the shell has no error control,
538: * the JOB_IGNERR flag is set in the job descriptor.
539: * If the command is "..." and we're not ignoring such things,
540: * tailCmds is set to the successor node of the cmd.
541: * numCommands is incremented if the command is actually printed.
542: *-----------------------------------------------------------------------
543: */
544: static int
1.78 ! espie 545: JobPrintCommand(LstNode cmdNode, /* command string to print */
! 546: void *jobp) /* job for which to print it */
1.1 deraadt 547: {
1.78 ! espie 548: bool noSpecials; /* true if we shouldn't worry about
! 549: * inserting special commands into
! 550: * the input stream. */
! 551: bool shutUp = false; /* true if we put a no echo command
! 552: * into the command file */
! 553: bool errOff = false; /* true if we turned error checking
! 554: * off before printing the command
! 555: * and need to turn it back on */
! 556: char *cmdTemplate; /* Template to use when printing the
! 557: * command */
! 558: char *cmdStart; /* Start of expanded command */
1.66 espie 559: char *cmd = (char *)Lst_Datum(cmdNode);
560: Job *job = (Job *)jobp;
561:
562: noSpecials = (noExecute && !(job->node->type & OP_MAKE));
563:
564: if (strcmp(cmd, "...") == 0) {
565: job->node->type |= OP_SAVE_CMDS;
566: if ((job->flags & JOB_IGNDOTS) == 0) {
567: job->tailCmds = Lst_Succ(cmdNode);
568: return 0;
569: }
570: return 1;
1.2 deraadt 571: }
1.1 deraadt 572:
1.78 ! espie 573:
1.67 espie 574: numCommands++;
1.1 deraadt 575:
1.66 espie 576: /* For debugging, we replace each command with the result of expanding
577: * the variables in the command. */
578: cmdStart = cmd = Var_Subst(cmd, &job->node->context, false);
579: Lst_Replace(cmdNode, cmdStart);
1.1 deraadt 580:
1.66 espie 581: cmdTemplate = "%s\n";
1.1 deraadt 582:
1.66 espie 583: /*
584: * Check for leading @' and -'s to control echoing and error checking.
585: */
586: for (;; cmd++) {
587: if (*cmd == '@')
588: shutUp = DEBUG(LOUD) ? false : true;
589: else if (*cmd == '-')
590: errOff = true;
591: else if (*cmd != '+')
592: break;
1.1 deraadt 593: }
594:
1.66 espie 595: while (isspace(*cmd))
596: cmd++;
597:
598: if (shutUp) {
1.72 espie 599: if (!(job->flags & JOB_SILENT) && !noSpecials) {
1.71 espie 600: DBPRINTF(job, "%s\n", SHELL_ECHO_OFF);
1.1 deraadt 601: } else {
1.66 espie 602: shutUp = false;
603: }
604: }
605:
606: if (errOff) {
607: if ( !(job->flags & JOB_IGNERR) && !noSpecials) {
1.72 espie 608: /*
1.78 ! espie 609: * we don't want the error-control commands showing
! 610: * up either, so we turn off echoing while executing
! 611: * them. We could put another field in the shell
! 612: * structure to tell JobDoOutput to look for this
! 613: * string too, but why make it any more complex than
! 614: * it already is?
1.72 espie 615: */
616: if (!(job->flags & JOB_SILENT) && !shutUp) {
1.75 espie 617: DBPRINTF(job, "%s; %s; %s\n", SHELL_ECHO_OFF,
618: SHELL_ERROR_OFF, SHELL_ECHO_ON);
1.66 espie 619: } else {
1.72 espie 620: DBPRINTF(job, "%s\n", SHELL_ERROR_OFF);
1.66 espie 621: }
622: } else {
623: errOff = false;
1.1 deraadt 624: }
1.66 espie 625: }
626:
1.69 espie 627: DBPRINTF(job, cmdTemplate, cmd);
1.66 espie 628:
629: if (errOff) {
630: /*
631: * If echoing is already off, there's no point in issuing the
632: * echoOff command. Otherwise we issue it and pretend it was on
633: * for the whole command...
1.1 deraadt 634: */
1.72 espie 635: if (!shutUp && !(job->flags & JOB_SILENT)) {
1.71 espie 636: DBPRINTF(job, "%s\n", SHELL_ECHO_OFF);
1.41 espie 637: shutUp = true;
1.1 deraadt 638: }
1.71 espie 639: DBPRINTF(job, "%s\n", SHELL_ERROR_ON);
1.66 espie 640: }
641: if (shutUp) {
1.71 espie 642: DBPRINTF(job, "%s\n", SHELL_ECHO_ON);
1.1 deraadt 643: }
1.66 espie 644: return 1;
1.1 deraadt 645: }
646:
647: /*-
648: *-----------------------------------------------------------------------
649: * JobSaveCommand --
650: * Save a command to be executed when everything else is done.
651: * Callback function for JobFinish...
652: *
653: * Side Effects:
1.78 ! espie 654: * The command is tacked onto the end of end_node's commands list.
1.1 deraadt 655: *-----------------------------------------------------------------------
656: */
1.27 espie 657: static void
1.56 espie 658: JobSaveCommand(void *cmd, void *gn)
1.1 deraadt 659: {
1.66 espie 660: GNode *g = (GNode *)gn;
661: char *result;
1.28 espie 662:
1.66 espie 663: result = Var_Subst((char *)cmd, &g->context, false);
1.78 ! espie 664: Lst_AtEnd(&end_node->commands, result);
1.2 deraadt 665: }
666:
667:
668: /*-
669: *-----------------------------------------------------------------------
670: * JobClose --
671: * Called to close both input and output pipes when a job is finished.
672: *
673: * Side Effects:
674: * The file descriptors associated with the job are closed.
675: *-----------------------------------------------------------------------
676: */
677: static void
1.56 espie 678: JobClose(Job *job)
1.2 deraadt 679: {
1.76 espie 680: FD_CLR(job->inPipe, outputsp);
681: if (job->outPipe != job->inPipe) {
682: (void)close(job->outPipe);
1.66 espie 683: }
1.76 espie 684: JobDoOutput(job, true);
685: (void)close(job->inPipe);
1.1 deraadt 686: }
687:
688: /*-
689: *-----------------------------------------------------------------------
690: * JobFinish --
691: * Do final processing for the given job including updating
692: * parents and starting new jobs as available/necessary. Note
693: * that we pay no attention to the JOB_IGNERR flag here.
694: * This is because when we're called because of a noexecute flag
695: * or something, jstat.w_status is 0 and when called from
696: * Job_CatchChildren, the status is zeroed if it s/b ignored.
697: *
698: * Side Effects:
699: * Some nodes may be put on the toBeMade queue.
1.78 ! espie 700: * Final commands for the job are placed on end_node.
1.1 deraadt 701: *
1.6 millert 702: * If we got an error and are aborting (aborting == ABORT_ERROR) and
1.1 deraadt 703: * the job list is now empty, we are done for the day.
1.6 millert 704: * If we recognized an error (errors !=0), we set the aborting flag
1.1 deraadt 705: * to ABORT_ERROR so no more jobs will be started.
706: *-----------------------------------------------------------------------
707: */
708: /*ARGSUSED*/
709: static void
1.56 espie 710: JobFinish(Job *job, /* job to finish */
711: int *status) /* sub-why job went away */
1.2 deraadt 712: {
1.78 ! espie 713: bool done;
1.2 deraadt 714:
1.66 espie 715: if ((WIFEXITED(*status) &&
716: WEXITSTATUS(*status) != 0 && !(job->flags & JOB_IGNERR)) ||
717: (WIFSIGNALED(*status) && WTERMSIG(*status) != SIGCONT)) {
718: /*
719: * If it exited non-zero and either we're doing things our
720: * way or we're not ignoring errors, the job is finished.
721: * Similarly, if the shell died because of a signal
722: * the job is also finished. In these
723: * cases, finish out the job's output before printing the exit
724: * status...
725: */
726: JobClose(job);
727: if (job->cmdFILE != NULL && job->cmdFILE != stdout) {
728: (void)fclose(job->cmdFILE);
729: }
730: done = true;
731: } else if (WIFEXITED(*status)) {
732: /*
733: * Deal with ignored errors in -B mode. We need to print a
734: * message telling of the ignored error as well as setting
735: * status.w_status to 0 so the next command gets run. To do
736: * this, we set done to be true if in -B mode and the job
737: * exited non-zero.
738: */
739: done = WEXITSTATUS(*status) != 0;
740: /*
741: * Old comment said: "Note we don't want to close down any of
742: * the streams until we know we're at the end." But we do.
743: * Otherwise when are we going to print the rest of the stuff?
744: */
745: JobClose(job);
746: } else {
747: /*
748: * No need to close things down or anything.
749: */
750: done = false;
1.1 deraadt 751: }
1.6 millert 752:
1.66 espie 753: if (done ||
754: WIFSTOPPED(*status) ||
755: (WIFSIGNALED(*status) && WTERMSIG(*status) == SIGCONT) ||
756: DEBUG(JOB)) {
757: FILE *out;
758:
1.76 espie 759: out = stdout;
1.1 deraadt 760:
1.66 espie 761: if (WIFEXITED(*status)) {
762: if (DEBUG(JOB)) {
1.78 ! espie 763: (void)fprintf(stdout,
! 764: "Process %ld exited.\n", (long)job->pid);
1.66 espie 765: (void)fflush(stdout);
766: }
767: if (WEXITSTATUS(*status) != 0) {
1.76 espie 768: if (job->node != lastNode) {
1.66 espie 769: MESSAGE(out, job->node);
770: lastNode = job->node;
771: }
772: (void)fprintf(out, "*** Error code %d%s\n",
773: WEXITSTATUS(*status),
1.68 espie 774: (job->flags & JOB_IGNERR) ? "(ignored)" :
1.66 espie 775: "");
776:
777: if (job->flags & JOB_IGNERR) {
778: *status = 0;
779: }
780: } else if (DEBUG(JOB)) {
1.76 espie 781: if (job->node != lastNode) {
1.66 espie 782: MESSAGE(out, job->node);
783: lastNode = job->node;
784: }
1.68 espie 785: (void)fprintf(out,
1.66 espie 786: "*** Completed successfully\n");
787: }
788: } else if (WIFSTOPPED(*status)) {
789: if (DEBUG(JOB)) {
1.78 ! espie 790: (void)fprintf(stdout,
! 791: "Process %ld stopped.\n", (long)job->pid);
1.66 espie 792: (void)fflush(stdout);
793: }
1.76 espie 794: if (job->node != lastNode) {
1.66 espie 795: MESSAGE(out, job->node);
796: lastNode = job->node;
797: }
798: (void)fprintf(out, "*** Stopped -- signal %d\n",
799: WSTOPSIG(*status));
800: job->flags |= JOB_RESUME;
801: Lst_AtEnd(&stoppedJobs, job);
802: (void)fflush(out);
803: return;
804: } else if (WTERMSIG(*status) == SIGCONT) {
805: /*
806: * If the beastie has continued, shift the Job from the
807: * stopped list to the running one (or re-stop it if
808: * concurrency is exceeded) and go and get another
809: * child.
810: */
811: if (job->flags & (JOB_RESUME|JOB_RESTART)) {
1.76 espie 812: if (job->node != lastNode) {
1.66 espie 813: MESSAGE(out, job->node);
814: lastNode = job->node;
815: }
816: (void)fprintf(out, "*** Continued\n");
817: }
818: if (!(job->flags & JOB_CONTINUING)) {
819: if (DEBUG(JOB)) {
820: (void)fprintf(stdout,
1.78 ! espie 821: "Warning: process %ld was not continuing.\n",
1.66 espie 822: (long)job->pid);
823: (void)fflush(stdout);
824: }
825: #if 0
826: /*
827: * We don't really want to restart a job from
828: * scratch just because it continued,
829: * especially not without killing the
830: * continuing process! That's why this is
831: * ifdef'ed out. FD - 9/17/90
832: */
833: JobRestart(job);
1.2 deraadt 834: #endif
1.66 espie 835: }
836: job->flags &= ~JOB_CONTINUING;
837: Lst_AtEnd(&jobs, job);
1.67 espie 838: nJobs++;
1.66 espie 839: if (DEBUG(JOB)) {
840: (void)fprintf(stdout,
841: "Process %ld is continuing locally.\n",
842: (long)job->pid);
843: (void)fflush(stdout);
844: }
845: if (nJobs == maxJobs) {
846: jobFull = true;
847: if (DEBUG(JOB)) {
1.68 espie 848: (void)fprintf(stdout,
1.66 espie 849: "Job queue is full.\n");
850: (void)fflush(stdout);
851: }
852: }
853: (void)fflush(out);
854: return;
855: } else {
1.76 espie 856: if (job->node != lastNode) {
1.66 espie 857: MESSAGE(out, job->node);
858: lastNode = job->node;
859: }
1.68 espie 860: (void)fprintf(out, "*** Signal %d\n",
1.66 espie 861: WTERMSIG(*status));
1.40 espie 862: }
1.66 espie 863:
864: (void)fflush(out);
1.1 deraadt 865: }
866:
1.66 espie 867: /*
868: * Now handle the -B-mode stuff. If the beast still isn't finished,
869: * try and restart the job on the next command. If JobStart says it's
870: * ok, it's ok. If there's an error, this puppy is done.
871: */
872: if (compatMake && WIFEXITED(*status) && job->node->current != NULL) {
873: switch (JobStart(job->node, job->flags & JOB_IGNDOTS, job)) {
874: case JOB_RUNNING:
875: done = false;
876: break;
877: case JOB_ERROR:
878: done = true;
879: W_SETEXITSTATUS(status, 1);
880: break;
881: case JOB_FINISHED:
882: /*
883: * If we got back a JOB_FINISHED code, JobStart has
884: * already called Make_Update and freed the job
885: * descriptor. We set done to false here to avoid fake
886: * cycles and double frees. JobStart needs to do the
887: * update so we can proceed up the graph when given the
888: * -n flag..
889: */
890: done = false;
891: break;
892: }
893: } else
894: done = true;
1.1 deraadt 895:
1.66 espie 896: if (done &&
897: aborting != ABORT_ERROR &&
898: aborting != ABORT_INTERRUPT &&
899: *status == 0) {
900: /* As long as we aren't aborting and the job didn't return a
901: * non-zero status that we shouldn't ignore, we call
902: * Make_Update to update the parents. In addition, any saved
903: * commands for the node are placed on the .END target. */
904: Lst_ForEachFrom(job->tailCmds, JobSaveCommand, job->node);
905: job->node->made = MADE;
906: Make_Update(job->node);
907: free(job);
908: } else if (*status != 0) {
1.67 espie 909: errors++;
1.66 espie 910: free(job);
911: }
1.1 deraadt 912:
1.66 espie 913: JobRestartJobs();
1.1 deraadt 914:
915: /*
1.66 espie 916: * Set aborting if any error.
1.1 deraadt 917: */
1.66 espie 918: if (errors && !keepgoing && aborting != ABORT_INTERRUPT) {
919: /*
920: * If we found any errors in this batch of children and the -k
921: * flag wasn't given, we set the aborting flag so no more jobs
922: * get started.
923: */
924: aborting = ABORT_ERROR;
925: }
1.6 millert 926:
1.66 espie 927: if (aborting == ABORT_ERROR && Job_Empty()) {
928: /*
929: * If we are aborting and the job table is now empty, we finish.
930: */
931: (void)eunlink(tfile);
932: Finish(errors);
933: }
1.1 deraadt 934: }
935:
936: /*-
937: *-----------------------------------------------------------------------
938: * JobExec --
939: * Execute the shell for the given job. Called from JobStart and
940: * JobRestart.
941: *
942: * Side Effects:
943: * A shell is executed, outputs is altered and the Job structure added
944: * to the job table.
945: *-----------------------------------------------------------------------
946: */
947: static void
1.56 espie 948: JobExec(Job *job, char **argv)
1.1 deraadt 949: {
1.66 espie 950: pid_t cpid; /* ID of new child */
1.6 millert 951:
1.66 espie 952: if (DEBUG(JOB)) {
1.78 ! espie 953: int i;
1.6 millert 954:
1.66 espie 955: (void)fprintf(stdout, "Running %s\n", job->node->name);
956: (void)fprintf(stdout, "\tCommand: ");
957: for (i = 0; argv[i] != NULL; i++) {
958: (void)fprintf(stdout, "%s ", argv[i]);
959: }
960: (void)fprintf(stdout, "\n");
961: (void)fflush(stdout);
1.1 deraadt 962: }
1.6 millert 963:
1.66 espie 964: /*
965: * Some jobs produce no output and it's disconcerting to have
966: * no feedback of their running (since they produce no output, the
967: * banner with their name in it never appears). This is an attempt to
968: * provide that feedback, even if nothing follows it.
969: */
970: if (lastNode != job->node && (job->flags & JOB_FIRST) &&
971: !(job->flags & JOB_SILENT)) {
972: MESSAGE(stdout, job->node);
973: lastNode = job->node;
974: }
1.1 deraadt 975:
1.66 espie 976: if ((cpid = fork()) == -1) {
977: Punt("Cannot fork");
978: } else if (cpid == 0) {
1.6 millert 979:
1.66 espie 980: /*
981: * Must duplicate the input stream down to the child's input
982: * and reset it to the beginning (again). Since the stream was
983: * marked close-on-exec, we must clear that bit in the new
984: * input.
985: */
986: if (dup2(FILENO(job->cmdFILE), 0) == -1)
987: Punt("Cannot dup2: %s", strerror(errno));
988: (void)fcntl(0, F_SETFD, 0);
989: (void)lseek(0, 0, SEEK_SET);
990:
1.76 espie 991: /*
1.78 ! espie 992: * Set up the child's output to be routed through the pipe
! 993: * we've created for it.
1.76 espie 994: */
995: if (dup2(job->outPipe, 1) == -1)
996: Punt("Cannot dup2: %s", strerror(errno));
1.66 espie 997: /*
998: * The output channels are marked close on exec. This bit was
999: * duplicated by the dup2 (on some systems), so we have to
1000: * clear it before routing the shell's error output to the same
1001: * place as its standard output.
1002: */
1003: (void)fcntl(1, F_SETFD, 0);
1004: if (dup2(1, 2) == -1)
1005: Punt("Cannot dup2: %s", strerror(errno));
1.1 deraadt 1006:
1007: #ifdef USE_PGRP
1.66 espie 1008: /*
1009: * We want to switch the child into a different process family
1010: * so we can kill it and all its descendants in one fell swoop,
1011: * by killing its process family, but not commit suicide.
1012: */
1.2 deraadt 1013: # if defined(SYSV)
1.66 espie 1014: (void)setsid();
1.2 deraadt 1015: # else
1.66 espie 1016: (void)setpgid(0, getpid());
1.2 deraadt 1017: # endif
1018: #endif /* USE_PGRP */
1.1 deraadt 1019:
1.66 espie 1020: (void)execv(shellPath, argv);
1021:
1022: (void)write(STDERR_FILENO, "Could not execute shell\n",
1023: sizeof("Could not execute shell"));
1024: _exit(1);
1025: } else {
1026: job->pid = cpid;
1027:
1.76 espie 1028: if (job->flags & JOB_FIRST) {
1.66 espie 1029: /*
1030: * The first time a job is run for a node, we set the
1031: * current position in the buffer to the beginning and
1032: * mark another stream to watch in the outputs mask
1033: */
1034: job->curPos = 0;
1035:
1036: if (outputsp == NULL || job->inPipe > outputsn) {
1037: int bytes, obytes;
1038: char *tmp;
1039:
1.68 espie 1040: bytes = howmany(job->inPipe+1, NFDBITS) *
1.66 espie 1041: sizeof(fd_mask);
1.68 espie 1042: obytes = outputsn ?
1043: howmany(outputsn+1, NFDBITS) *
1.66 espie 1044: sizeof(fd_mask) : 0;
1045:
1046: if (bytes != obytes) {
1047: tmp = realloc(outputsp, bytes);
1048: if (tmp == NULL)
1049: return;
1050: memset(tmp + obytes, 0, bytes - obytes);
1051: outputsp = (fd_set *)tmp;
1052: }
1053: outputsn = job->inPipe;
1054: }
1055: FD_SET(job->inPipe, outputsp);
1056: }
1.2 deraadt 1057:
1.66 espie 1058: /*
1059: * XXX: Used to not happen if REMOTE. Why?
1060: */
1061: if (job->cmdFILE != NULL && job->cmdFILE != stdout) {
1062: (void)fclose(job->cmdFILE);
1063: job->cmdFILE = NULL;
1064: }
1.1 deraadt 1065: }
1066:
1.48 espie 1067: /*
1.66 espie 1068: * Now the job is actually running, add it to the table.
1.48 espie 1069: */
1.67 espie 1070: nJobs++;
1.66 espie 1071: Lst_AtEnd(&jobs, job);
1072: if (nJobs == maxJobs) {
1073: jobFull = true;
1.1 deraadt 1074: }
1075: }
1076:
1077: /*-
1078: *-----------------------------------------------------------------------
1079: * JobMakeArgv --
1080: * Create the argv needed to execute the shell for a given job.
1081: *-----------------------------------------------------------------------
1082: */
1083: static void
1.56 espie 1084: JobMakeArgv(Job *job, char **argv)
1.1 deraadt 1085: {
1.66 espie 1086: int argc;
1087: static char args[10]; /* For merged arguments */
1.6 millert 1088:
1.70 espie 1089: argv[0] = (char *)shellName;
1.66 espie 1090: argc = 1;
1.1 deraadt 1091:
1.73 espie 1092: (void)snprintf(args, sizeof(args), "-%s%s",
1093: (job->flags & JOB_IGNERR) ? "" : SHELL_ERROR_FLAG,
1094: (job->flags & JOB_SILENT) ? "" : SHELL_ECHO_FLAG);
1095:
1096: if (args[1]) {
1097: argv[argc] = args;
1098: argc++;
1.78 ! espie 1099: }
1.66 espie 1100: argv[argc] = NULL;
1.1 deraadt 1101: }
1102:
1103: /*-
1104: *-----------------------------------------------------------------------
1105: * JobRestart --
1.6 millert 1106: * Restart a job that stopped for some reason.
1.1 deraadt 1107: *
1108: * Side Effects:
1109: * jobFull will be set if the job couldn't be run.
1110: *-----------------------------------------------------------------------
1111: */
1112: static void
1.56 espie 1113: JobRestart(Job *job)
1.1 deraadt 1114: {
1.66 espie 1115: if (job->flags & JOB_RESTART) {
1116: /*
1117: * Set up the control arguments to the shell. This is based on
1118: * the flags set earlier for this job. If the JOB_IGNERR flag
1119: * is clear, the 'exit' flag of the commandShell is used to
1120: * cause it to exit upon receiving an error. If the JOB_SILENT
1121: * flag is clear, the 'echo' flag of the commandShell is used
1122: * to get it to start echoing as soon as it starts processing
1123: * commands.
1124: */
1125: char *argv[4];
1.6 millert 1126:
1.66 espie 1127: JobMakeArgv(job, argv);
1.2 deraadt 1128:
1.1 deraadt 1129: if (DEBUG(JOB)) {
1.68 espie 1130: (void)fprintf(stdout, "Restarting %s...",
1.66 espie 1131: job->node->name);
1132: (void)fflush(stdout);
1.1 deraadt 1133: }
1.78 ! espie 1134: if (nJobs >= maxJobs && !(job->flags & JOB_SPECIAL)) {
1.66 espie 1135: /*
1136: * Can't be exported and not allowed to run locally --
1137: * put it back on the hold queue and mark the table
1138: * full
1139: */
1140: if (DEBUG(JOB)) {
1141: (void)fprintf(stdout, "holding\n");
1142: (void)fflush(stdout);
1143: }
1144: Lst_AtFront(&stoppedJobs, job);
1145: jobFull = true;
1146: if (DEBUG(JOB)) {
1147: (void)fprintf(stdout, "Job queue is full.\n");
1148: (void)fflush(stdout);
1149: }
1150: return;
1151: } else {
1152: /*
1153: * Job may be run locally.
1154: */
1155: if (DEBUG(JOB)) {
1156: (void)fprintf(stdout, "running locally\n");
1157: (void)fflush(stdout);
1158: }
1.1 deraadt 1159: }
1.66 espie 1160: JobExec(job, argv);
1161: } else {
1.1 deraadt 1162: /*
1.66 espie 1163: * The job has stopped and needs to be restarted. Why it
1164: * stopped, we don't know...
1.1 deraadt 1165: */
1166: if (DEBUG(JOB)) {
1.66 espie 1167: (void)fprintf(stdout, "Resuming %s...", job->node->name);
1168: (void)fflush(stdout);
1.1 deraadt 1169: }
1.78 ! espie 1170: if (nJobs != maxJobs || (job->flags & JOB_SPECIAL)) {
1.66 espie 1171: /*
1.78 ! espie 1172: * If we haven't reached the concurrency limit already,
! 1173: * it's ok to resume the job.
1.66 espie 1174: */
1175: bool error;
1176: int status;
1177:
1178: error = KILL(job->pid, SIGCONT) != 0;
1179:
1180: if (!error) {
1181: /*
1182: * Make sure the user knows we've continued the
1183: * beast and actually put the thing in the job
1184: * table.
1185: */
1186: job->flags |= JOB_CONTINUING;
1187: W_SETTERMSIG(&status, SIGCONT);
1188: JobFinish(job, &status);
1189:
1190: job->flags &= ~(JOB_RESUME|JOB_CONTINUING);
1191: if (DEBUG(JOB)) {
1192: (void)fprintf(stdout, "done\n");
1193: (void)fflush(stdout);
1194: }
1195: } else {
1196: Error("couldn't resume %s: %s",
1197: job->node->name, strerror(errno));
1198: status = 0;
1199: W_SETEXITSTATUS(&status, 1);
1200: JobFinish(job, &status);
1201: }
1202: } else {
1203: /*
1204: * Job cannot be restarted. Mark the table as full and
1205: * place the job back on the list of stopped jobs.
1206: */
1207: if (DEBUG(JOB)) {
1208: (void)fprintf(stdout, "table full\n");
1209: (void)fflush(stdout);
1210: }
1211: Lst_AtFront(&stoppedJobs, job);
1212: jobFull = true;
1213: if (DEBUG(JOB)) {
1214: (void)fprintf(stdout, "Job queue is full.\n");
1215: (void)fflush(stdout);
1216: }
1.1 deraadt 1217: }
1218: }
1219: }
1220:
1221: /*-
1222: *-----------------------------------------------------------------------
1223: * JobStart --
1224: * Start a target-creation process going for the target described
1.6 millert 1225: * by the graph node gn.
1.1 deraadt 1226: *
1227: * Results:
1228: * JOB_ERROR if there was an error in the commands, JOB_FINISHED
1229: * if there isn't actually anything left to do for the job and
1230: * JOB_RUNNING if the job has been started.
1231: *
1232: * Side Effects:
1233: * A new Job node is created and added to the list of running
1234: * jobs. PMake is forked and a child shell created.
1235: *-----------------------------------------------------------------------
1236: */
1237: static int
1.78 ! espie 1238: JobStart(GNode *gn, /* target to create */
! 1239: int flags, /* flags for the job to override normal ones.
! 1240: * e.g. JOB_SPECIAL or JOB_IGNDOTS */
! 1241: Job *previous) /* The previous Job structure for this node,
! 1242: * if any. */
! 1243: {
! 1244: Job *job; /* new job descriptor */
! 1245: char *argv[4]; /* Argument vector to shell */
! 1246: bool cmdsOK; /* true if the nodes commands were all right */
! 1247: bool local; /* Set true if the job was run locally */
! 1248: bool noExec; /* Set true if we decide not to run the job */
1.66 espie 1249:
1250: if (previous != NULL) {
1251: previous->flags &= ~(JOB_FIRST|JOB_IGNERR|JOB_SILENT);
1252: job = previous;
1253: } else {
1254: job = emalloc(sizeof(Job));
1255: if (job == NULL) {
1256: Punt("JobStart out of memory");
1257: }
1258: flags |= JOB_FIRST;
1.1 deraadt 1259: }
1260:
1.66 espie 1261: job->node = gn;
1262: job->tailCmds = NULL;
1.1 deraadt 1263:
1264: /*
1.66 espie 1265: * Set the initial value of the flags for this job based on the global
1266: * ones and the node's attributes... Any flags supplied by the caller
1267: * are also added to the field.
1.1 deraadt 1268: */
1.66 espie 1269: job->flags = 0;
1270: if (Targ_Ignore(gn)) {
1271: job->flags |= JOB_IGNERR;
1272: }
1273: if (Targ_Silent(gn)) {
1274: job->flags |= JOB_SILENT;
1.1 deraadt 1275: }
1.66 espie 1276: job->flags |= flags;
1.6 millert 1277:
1.1 deraadt 1278: /*
1.66 espie 1279: * Check the commands now so any attributes from .DEFAULT have a chance
1280: * to migrate to the node
1.1 deraadt 1281: */
1.66 espie 1282: if (!compatMake && job->flags & JOB_FIRST) {
1283: cmdsOK = Job_CheckCommands(gn, Error);
1284: } else {
1285: cmdsOK = true;
1286: }
1.1 deraadt 1287:
1288: /*
1.66 espie 1289: * If the -n flag wasn't given, we open up OUR (not the child's)
1290: * temporary file to stuff commands in it. The thing is rd/wr so we
1291: * don't need to reopen it to feed it to the shell. If the -n flag
1292: * *was* given, we just set the file to be stdout. Cute, huh?
1.1 deraadt 1293: */
1.66 espie 1294: if ((gn->type & OP_MAKE) || (!noExecute && !touchFlag)) {
1295: /*
1296: * We're serious here, but if the commands were bogus, we're
1297: * also dead...
1298: */
1299: if (!cmdsOK) {
1300: DieHorribly();
1301: }
1.6 millert 1302:
1.66 espie 1303: job->cmdFILE = fopen(tfile, "w+");
1304: if (job->cmdFILE == NULL) {
1305: Punt("Could not open %s", tfile);
1306: }
1307: (void)fcntl(FILENO(job->cmdFILE), F_SETFD, 1);
1308: /*
1309: * Send the commands to the command file, flush all its buffers
1310: * then rewind and remove the thing.
1311: */
1312: noExec = false;
1313:
1314: /*
1315: * used to be backwards; replace when start doing multiple
1316: * commands per shell.
1317: */
1318: if (compatMake) {
1319: /*
1320: * Be compatible: If this is the first time for this
1321: * node, verify its commands are ok and open the
1322: * commands list for sequential access by later
1323: * invocations of JobStart. Once that is done, we take
1324: * the next command off the list and print it to the
1325: * command file. If the command was an ellipsis, note
1326: * that there's nothing more to execute.
1327: */
1328: if ((job->flags&JOB_FIRST))
1329: gn->current = Lst_First(&gn->commands);
1330: else
1331: gn->current = Lst_Succ(gn->current);
1332:
1333: if (gn->current == NULL ||
1334: !JobPrintCommand(gn->current, job)) {
1335: noExec = true;
1336: gn->current = NULL;
1337: }
1338: if (noExec && !(job->flags & JOB_FIRST)) {
1339: /*
1340: * If we're not going to execute anything, the
1341: * job is done and we need to close down the
1342: * various file descriptors we've opened for
1343: * output, then call JobDoOutput to catch the
1344: * final characters or send the file to the
1345: * screen... Note that the i/o streams are only
1346: * open if this isn't the first job. Note also
1347: * that this could not be done in
1348: * Job_CatchChildren b/c it wasn't clear if
1349: * there were more commands to execute or
1350: * not...
1351: */
1352: JobClose(job);
1353: }
1354: } else {
1355: /*
1356: * We can do all the commands at once. hooray for
1357: * sanity
1358: */
1359: numCommands = 0;
1.68 espie 1360: Lst_ForEachNodeWhile(&gn->commands, JobPrintCommand,
1.66 espie 1361: job);
1362:
1363: /*
1364: * If we didn't print out any commands to the shell
1365: * script, there's not much point in executing the
1366: * shell, is there?
1367: */
1368: if (numCommands == 0) {
1369: noExec = true;
1370: }
1371: }
1372: } else if (noExecute) {
1373: /*
1374: * Not executing anything -- just print all the commands to
1375: * stdout in one fell swoop. This will still set up
1376: * job->tailCmds correctly.
1377: */
1378: if (lastNode != gn) {
1379: MESSAGE(stdout, gn);
1380: lastNode = gn;
1381: }
1382: job->cmdFILE = stdout;
1383: /*
1384: * Only print the commands if they're ok, but don't die if
1385: * they're not -- just let the user know they're bad and keep
1386: * going. It doesn't do any harm in this case and may do some
1387: * good.
1388: */
1389: if (cmdsOK) {
1.68 espie 1390: Lst_ForEachNodeWhile(&gn->commands, JobPrintCommand,
1.66 espie 1391: job);
1392: }
1393: /*
1394: * Don't execute the shell, thank you.
1395: */
1.41 espie 1396: noExec = true;
1.66 espie 1397: } else {
1398: /*
1399: * Just touch the target and note that no shell should be
1400: * executed. Set cmdFILE to stdout to make life easier. Check
1401: * the commands, too, but don't die if they're no good -- it
1402: * does no harm to keep working up the graph.
1.30 espie 1403: */
1.66 espie 1404: job->cmdFILE = stdout;
1405: Job_Touch(gn, job->flags&JOB_SILENT);
1.41 espie 1406: noExec = true;
1.1 deraadt 1407: }
1.66 espie 1408:
1.1 deraadt 1409: /*
1.66 espie 1410: * If we're not supposed to execute a shell, don't.
1.1 deraadt 1411: */
1.66 espie 1412: if (noExec) {
1413: /*
1414: * Unlink and close the command file if we opened one
1415: */
1416: if (job->cmdFILE != stdout) {
1417: (void)eunlink(tfile);
1418: if (job->cmdFILE != NULL)
1419: (void)fclose(job->cmdFILE);
1420: } else {
1421: (void)fflush(stdout);
1422: }
1.1 deraadt 1423:
1.66 espie 1424: /*
1425: * We only want to work our way up the graph if we aren't here
1426: * because the commands for the job were no good.
1427: */
1428: if (cmdsOK) {
1429: if (aborting == 0) {
1.68 espie 1430: Lst_ForEachFrom(job->tailCmds, JobSaveCommand,
1.66 espie 1431: job->node);
1432: Make_Update(job->node);
1433: }
1434: free(job);
1435: return JOB_FINISHED;
1436: } else {
1437: free(job);
1438: return JOB_ERROR;
1439: }
1.1 deraadt 1440: } else {
1.66 espie 1441: (void)fflush(job->cmdFILE);
1442: (void)eunlink(tfile);
1.1 deraadt 1443: }
1444:
1445: /*
1.66 espie 1446: * Set up the control arguments to the shell. This is based on the flags
1447: * set earlier for this job.
1.1 deraadt 1448: */
1.66 espie 1449: JobMakeArgv(job, argv);
1.1 deraadt 1450:
1.66 espie 1451: /*
1452: * If we're using pipes to catch output, create the pipe by which we'll
1453: * get the shell's output. If we're using files, print out that we're
1454: * starting a job and then set up its temporary-file name.
1455: */
1456: if (!compatMake || (job->flags & JOB_FIRST)) {
1.76 espie 1457: int fd[2];
1458: if (pipe(fd) == -1)
1459: Punt("Cannot create pipe: %s", strerror(errno));
1460: job->inPipe = fd[0];
1461: job->outPipe = fd[1];
1462: (void)fcntl(job->inPipe, F_SETFD, 1);
1463: (void)fcntl(job->outPipe, F_SETFD, 1);
1.1 deraadt 1464: }
1465:
1.41 espie 1466: local = true;
1.1 deraadt 1467:
1.78 ! espie 1468: if (nJobs >= maxJobs && !(job->flags & JOB_SPECIAL)) {
! 1469: /* we've hit the limit of concurrency, so put the job on hold
! 1470: * until some other job finishes.
1.66 espie 1471: */
1472: jobFull = true;
1.6 millert 1473:
1.66 espie 1474: if (DEBUG(JOB)) {
1475: (void)fprintf(stdout, "Can only run job locally.\n");
1476: (void)fflush(stdout);
1477: }
1478: job->flags |= JOB_RESTART;
1479: Lst_AtEnd(&stoppedJobs, job);
1.1 deraadt 1480: }
1.66 espie 1481: return JOB_RUNNING;
1.1 deraadt 1482: }
1483:
1.6 millert 1484: static char *
1.56 espie 1485: JobOutput(Job *job, char *cp, char *endp, int msg)
1.2 deraadt 1486: {
1.66 espie 1487: char *ecp;
1.2 deraadt 1488:
1.74 espie 1489: ecp = strstr(cp, SHELL_ECHO_OFF);
1490: while (ecp != NULL) {
1491: if (cp != ecp) {
1492: *ecp = '\0';
1493: if (msg && job->node != lastNode) {
1494: MESSAGE(stdout, job->node);
1495: lastNode = job->node;
1.66 espie 1496: }
1.74 espie 1497: /*
1.78 ! espie 1498: * The only way there wouldn't be a newline after
! 1499: * this line is if it were the last in the buffer.
! 1500: * however, since the non-printable comes after it,
! 1501: * there must be a newline, so we don't print one.
1.74 espie 1502: */
1503: (void)fprintf(stdout, "%s", cp);
1504: (void)fflush(stdout);
1505: }
1506: cp = ecp + strlen(SHELL_ECHO_OFF);
1507: if (cp != endp) {
1508: /*
1.78 ! espie 1509: * Still more to print, look again after skipping
! 1510: * the whitespace following the non-printable
! 1511: * command....
1.74 espie 1512: */
1513: cp++;
1.78 ! espie 1514: while (*cp == ' ' || *cp == '\t' || *cp == '\n') {
1.66 espie 1515: cp++;
1516: }
1.74 espie 1517: ecp = strstr(cp, SHELL_ECHO_OFF);
1518: } else {
1519: return cp;
1.2 deraadt 1520: }
1521: }
1.66 espie 1522: return cp;
1.2 deraadt 1523: }
1524:
1.1 deraadt 1525: /*-
1526: *-----------------------------------------------------------------------
1.40 espie 1527: * JobDoOutput --
1.1 deraadt 1528: * This function is called at different times depending on
1529: * whether the user has specified that output is to be collected
1530: * via pipes or temporary files. In the former case, we are called
1531: * whenever there is something to read on the pipe. We collect more
1532: * output from the given job and store it in the job's outBuf. If
1533: * this makes up a line, we print it tagged by the job's identifier,
1534: * as necessary.
1535: * If output has been collected in a temporary file, we open the
1536: * file and read it line by line, transfering it to our own
1537: * output channel until the file is empty. At which point we
1538: * remove the temporary file.
1539: * In both cases, however, we keep our figurative eye out for the
1540: * 'noPrint' line for the shell from which the output came. If
1541: * we recognize a line, we don't print it. If the command is not
1.6 millert 1542: * alone on the line (the character after it is not \0 or \n), we
1.1 deraadt 1543: * do print whatever follows it.
1544: *
1545: * Side Effects:
1546: * curPos may be shifted as may the contents of outBuf.
1547: *-----------------------------------------------------------------------
1548: */
1.48 espie 1549: static void
1.66 espie 1550: JobDoOutput(Job *job, /* the job whose output needs printing */
1551: bool finish) /* true if this is the last time we'll be
1552: * called for this job */
1553: {
1.78 ! espie 1554: bool gotNL = false; /* true if got a newline */
1.66 espie 1555: bool fbuf; /* true if our buffer filled up */
1556: int nr; /* number of bytes read */
1557: int i; /* auxiliary index into outBuf */
1.78 ! espie 1558: int max; /* limit for i (end of current data) */
! 1559: int nRead; /* (Temporary) number of bytes read */
1.1 deraadt 1560:
1.76 espie 1561: /*
1562: * Read as many bytes as will fit in the buffer.
1563: */
1.1 deraadt 1564: end_loop:
1.76 espie 1565: gotNL = false;
1566: fbuf = false;
1.6 millert 1567:
1.76 espie 1568: nRead = read(job->inPipe, &job->outBuf[job->curPos],
1569: JOB_BUFSIZE - job->curPos);
1570: if (nRead == -1) {
1571: if (DEBUG(JOB)) {
1572: perror("JobDoOutput(piperead)");
1.66 espie 1573: }
1.76 espie 1574: nr = 0;
1575: } else {
1576: nr = nRead;
1577: }
1.1 deraadt 1578:
1.76 espie 1579: /*
1.78 ! espie 1580: * If we hit the end-of-file (the job is dead), we must flush its
! 1581: * remaining output, so pretend we read a newline if there's any
! 1582: * output remaining in the buffer.
! 1583: * Also clear the 'finish' flag so we stop looping.
1.76 espie 1584: */
1585: if (nr == 0 && job->curPos != 0) {
1586: job->outBuf[job->curPos] = '\n';
1587: nr = 1;
1588: finish = false;
1589: } else if (nr == 0) {
1590: finish = false;
1591: }
1.6 millert 1592:
1.76 espie 1593: /*
1.78 ! espie 1594: * Look for the last newline in the bytes we just got. If there is
! 1595: * one, break out of the loop with 'i' as its index and gotNL set
! 1596: * true.
1.76 espie 1597: */
1598: max = job->curPos + nr;
1599: for (i = job->curPos + nr - 1; i >= job->curPos; i--) {
1600: if (job->outBuf[i] == '\n') {
1601: gotNL = true;
1602: break;
1603: } else if (job->outBuf[i] == '\0') {
1604: /*
1605: * Why?
1606: */
1607: job->outBuf[i] = ' ';
1.66 espie 1608: }
1.76 espie 1609: }
1.6 millert 1610:
1.76 espie 1611: if (!gotNL) {
1612: job->curPos += nr;
1613: if (job->curPos == JOB_BUFSIZE) {
1.66 espie 1614: /*
1.78 ! espie 1615: * If we've run out of buffer space, we have no choice
! 1616: * but to print the stuff. sigh.
1.66 espie 1617: */
1.76 espie 1618: fbuf = true;
1619: i = job->curPos;
1620: }
1621: }
1622: if (gotNL || fbuf) {
1623: /*
1.78 ! espie 1624: * Need to send the output to the screen. Null terminate it
! 1625: * first, overwriting the newline character if there was one.
! 1626: * So long as the line isn't one we should filter (according
! 1627: * to the shell description), we print the line, preceded
! 1628: * by a target banner if this target isn't the same as the
! 1629: * one for which we last printed something.
! 1630: * The rest of the data in the buffer are then shifted down
! 1631: * to the start of the buffer and curPos is set accordingly.
1.76 espie 1632: */
1633: job->outBuf[i] = '\0';
1634: if (i >= job->curPos) {
1635: char *cp;
1.66 espie 1636:
1.78 ! espie 1637: cp = JobOutput(job, job->outBuf, &job->outBuf[i],
! 1638: false);
1.66 espie 1639:
1.76 espie 1640: /*
1.78 ! espie 1641: * There's still more in that thar buffer. This time,
! 1642: * though, we know there's no newline at the end, so we
! 1643: * add one of our own free will.
1.76 espie 1644: */
1645: if (*cp != '\0') {
1646: if (job->node != lastNode) {
1647: MESSAGE(stdout, job->node);
1648: lastNode = job->node;
1.66 espie 1649: }
1.76 espie 1650: (void)fprintf(stdout, "%s%s", cp,
1651: gotNL ? "\n" : "");
1652: (void)fflush(stdout);
1.66 espie 1653: }
1.76 espie 1654: }
1655: if (i < max - 1) {
1656: /* shift the remaining characters down */
1657: (void)memcpy(job->outBuf, &job->outBuf[i + 1],
1658: max - (i + 1));
1659: job->curPos = max - (i + 1);
1.66 espie 1660:
1.76 espie 1661: } else {
1.66 espie 1662: /*
1.78 ! espie 1663: * We have written everything out, so we just start over
! 1664: * from the start of the buffer. No copying. No nothing.
1.66 espie 1665: */
1.76 espie 1666: job->curPos = 0;
1.66 espie 1667: }
1.76 espie 1668: }
1669: if (finish) {
1.66 espie 1670: /*
1.78 ! espie 1671: * If the finish flag is true, we must loop until we hit
! 1672: * end-of-file on the pipe. This is guaranteed to happen
! 1673: * eventually since the other end of the pipe is now closed
! 1674: * (we closed it explicitly and the child has exited). When
! 1675: * we do get an EOF, finish will be set false and we'll fall
! 1676: * through and out.
1.76 espie 1677: */
1678: goto end_loop;
1.1 deraadt 1679: }
1680: }
1681:
1682: /*-
1683: *-----------------------------------------------------------------------
1684: * Job_CatchChildren --
1685: * Handle the exit of a child. Called from Make_Make.
1686: *
1687: * Side Effects:
1688: * The job descriptor is removed from the list of children.
1689: *
1690: * Notes:
1691: * We do waits, blocking or not, according to the wisdom of our
1692: * caller, until there are no more children to report. For each
1693: * job, call JobFinish to finish things off. This will take care of
1694: * putting jobs on the stoppedJobs queue.
1695: *-----------------------------------------------------------------------
1696: */
1697: void
1.76 espie 1698: Job_CatchChildren()
1.1 deraadt 1699: {
1.78 ! espie 1700: pid_t pid; /* pid of dead child */
! 1701: Job *job; /* job descriptor for dead child */
! 1702: LstNode jnode; /* list element for finding job */
! 1703: int status; /* Exit/termination status */
1.1 deraadt 1704:
1.66 espie 1705: /*
1706: * Don't even bother if we know there's no one around.
1707: */
1.78 ! espie 1708: if (nJobs == 0) {
1.66 espie 1709: return;
1.2 deraadt 1710: }
1.6 millert 1711:
1.76 espie 1712: while ((pid = waitpid((pid_t) -1, &status, WNOHANG|WUNTRACED)) > 0) {
1.66 espie 1713: HandleSigs();
1714: if (DEBUG(JOB)) {
1.68 espie 1715: (void)fprintf(stdout,
1.66 espie 1716: "Process %ld exited or stopped.\n", (long)pid);
1717: (void)fflush(stdout);
1718: }
1719:
1.1 deraadt 1720:
1.66 espie 1721: jnode = Lst_Find(&jobs, JobCmpPid, &pid);
1.1 deraadt 1722:
1.18 espie 1723: if (jnode == NULL) {
1.68 espie 1724: if (WIFSIGNALED(status) &&
1.66 espie 1725: (WTERMSIG(status) == SIGCONT)) {
1726: jnode = Lst_Find(&stoppedJobs, JobCmpPid, &pid);
1727: if (jnode == NULL) {
1728: Error("Resumed child (%ld) not in table", (long)pid);
1729: continue;
1730: }
1731: job = (Job *)Lst_Datum(jnode);
1732: Lst_Remove(&stoppedJobs, jnode);
1733: } else {
1734: Error("Child (%ld) not in table?", (long)pid);
1735: continue;
1736: }
1737: } else {
1738: job = (Job *)Lst_Datum(jnode);
1739: Lst_Remove(&jobs, jnode);
1.67 espie 1740: nJobs--;
1.66 espie 1741: if (jobFull && DEBUG(JOB)) {
1.68 espie 1742: (void)fprintf(stdout,
1.66 espie 1743: "Job queue is no longer full.\n");
1744: (void)fflush(stdout);
1745: }
1746: jobFull = false;
1.1 deraadt 1747: }
1.66 espie 1748:
1749: JobFinish(job, &status);
1.1 deraadt 1750: }
1751: }
1752:
1753: /*-
1754: *-----------------------------------------------------------------------
1755: * Job_CatchOutput --
1756: * Catch the output from our children, if we're using
1757: * pipes do so. Otherwise just block time until we get a
1.6 millert 1758: * signal (most likely a SIGCHLD) since there's no point in
1.1 deraadt 1759: * just spinning when there's nothing to do and the reaping
1.6 millert 1760: * of a child can wait for a while.
1.1 deraadt 1761: *
1762: * Side Effects:
1763: * Output is read from pipes if we're piping.
1764: * -----------------------------------------------------------------------
1765: */
1766: void
1.56 espie 1767: Job_CatchOutput(void)
1.1 deraadt 1768: {
1.66 espie 1769: int nfds;
1770: struct timeval timeout;
1771: LstNode ln;
1772: Job *job;
1773:
1.76 espie 1774: int count = howmany(outputsn+1, NFDBITS) * sizeof(fd_mask);
1775: fd_set *readfdsp = malloc(count);
1.77 espie 1776: (void)fflush(stdout);
1.76 espie 1777: if (readfdsp == NULL)
1778: return;
1779:
1780: memcpy(readfdsp, outputsp, count);
1781: timeout.tv_sec = SEL_SEC;
1782: timeout.tv_usec = SEL_USEC;
1.66 espie 1783:
1.76 espie 1784: if ((nfds = select(outputsn+1, readfdsp, (fd_set *) 0,
1785: (fd_set *) 0, &timeout)) <= 0) {
1786: HandleSigs();
1787: free(readfdsp);
1788: return;
1789: } else {
1790: HandleSigs();
1791: for (ln = Lst_First(&jobs); nfds && ln != NULL;
1792: ln = Lst_Adv(ln)) {
1793: job = (Job *)Lst_Datum(ln);
1794: if (FD_ISSET(job->inPipe, readfdsp)) {
1795: JobDoOutput(job, false);
1796: nfds--;
1.66 espie 1797: }
1.1 deraadt 1798: }
1799: }
1.76 espie 1800: free(readfdsp);
1.1 deraadt 1801: }
1802:
1803: /*-
1804: *-----------------------------------------------------------------------
1805: * Job_Make --
1806: * Start the creation of a target. Basically a front-end for
1807: * JobStart used by the Make module.
1808: *
1809: * Side Effects:
1810: * Another job is started.
1811: *-----------------------------------------------------------------------
1812: */
1813: void
1.56 espie 1814: Job_Make(GNode *gn)
1.1 deraadt 1815: {
1.66 espie 1816: (void)JobStart(gn, 0, NULL);
1.1 deraadt 1817: }
1818:
1819: /*-
1820: *-----------------------------------------------------------------------
1821: * Job_Init --
1822: * Initialize the process module
1823: *
1824: * Side Effects:
1825: * lists and counters are initialized
1826: *-----------------------------------------------------------------------
1827: */
1828: void
1.78 ! espie 1829: Job_Init(int maxproc)
1.1 deraadt 1830: {
1.66 espie 1831: int tfd;
1832:
1833: (void)strlcpy(tfile, TMPPAT, sizeof(tfile));
1834: if ((tfd = mkstemp(tfile)) == -1)
1835: Punt("Cannot create temp file: %s", strerror(errno));
1836: else
1837: (void)close(tfd);
1838:
1839: Static_Lst_Init(&jobs);
1840: Static_Lst_Init(&stoppedJobs);
1841: maxJobs = maxproc;
1842: jobFull = false;
1843:
1844: aborting = 0;
1845: errors = 0;
1.40 espie 1846:
1.66 espie 1847: lastNode = NULL;
1.1 deraadt 1848:
1.66 espie 1849: if (maxJobs == 1) {
1850: /*
1851: * If only one job can run at a time, there's no need for a
1852: * banner, no is there?
1853: */
1854: targFmt = "";
1855: } else {
1856: targFmt = TARG_FMT;
1857: }
1.1 deraadt 1858:
1859: /*
1.66 espie 1860: * Catch the four signals that POSIX specifies if they aren't ignored.
1861: * JobPassSig will take care of calling JobInterrupt if appropriate.
1.1 deraadt 1862: */
1.66 espie 1863: if (signal(SIGINT, SIG_IGN) != SIG_IGN) {
1864: (void)signal(SIGINT, SigHandler);
1865: }
1866: if (signal(SIGHUP, SIG_IGN) != SIG_IGN) {
1867: (void)signal(SIGHUP, SigHandler);
1868: }
1869: if (signal(SIGQUIT, SIG_IGN) != SIG_IGN) {
1870: (void)signal(SIGQUIT, SigHandler);
1871: }
1872: if (signal(SIGTERM, SIG_IGN) != SIG_IGN) {
1873: (void)signal(SIGTERM, SigHandler);
1874: }
1.1 deraadt 1875: /*
1.66 espie 1876: * There are additional signals that need to be caught and passed if
1877: * either the export system wants to be told directly of signals or if
1878: * we're giving each job its own process group (since then it won't get
1879: * signals from the terminal driver as we own the terminal)
1.1 deraadt 1880: */
1.48 espie 1881: #if defined(USE_PGRP)
1.66 espie 1882: if (signal(SIGTSTP, SIG_IGN) != SIG_IGN) {
1883: (void)signal(SIGTSTP, SigHandler);
1884: }
1885: if (signal(SIGTTOU, SIG_IGN) != SIG_IGN) {
1886: (void)signal(SIGTTOU, SigHandler);
1887: }
1888: if (signal(SIGTTIN, SIG_IGN) != SIG_IGN) {
1889: (void)signal(SIGTTIN, SigHandler);
1890: }
1891: if (signal(SIGWINCH, SIG_IGN) != SIG_IGN) {
1892: (void)signal(SIGWINCH, SigHandler);
1893: }
1.1 deraadt 1894: #endif
1.6 millert 1895:
1.78 ! espie 1896: if ((begin_node->type & OP_DUMMY) == 0) {
! 1897: JobStart(begin_node, JOB_SPECIAL, (Job *)0);
1.66 espie 1898: while (nJobs) {
1899: Job_CatchOutput();
1.76 espie 1900: Job_CatchChildren();
1.66 espie 1901: }
1.1 deraadt 1902: }
1903: }
1904:
1905: /*-
1906: *-----------------------------------------------------------------------
1907: * Job_Full --
1908: * See if the job table is full. It is considered full if it is OR
1909: * if we are in the process of aborting OR if we have
1910: * reached/exceeded our local quota. This prevents any more jobs
1911: * from starting up.
1912: *
1913: * Results:
1.41 espie 1914: * true if the job table is full, false otherwise
1.1 deraadt 1915: *-----------------------------------------------------------------------
1916: */
1.41 espie 1917: bool
1.56 espie 1918: Job_Full(void)
1.1 deraadt 1919: {
1.66 espie 1920: return aborting || jobFull;
1.1 deraadt 1921: }
1922:
1923: /*-
1924: *-----------------------------------------------------------------------
1925: * Job_Empty --
1.40 espie 1926: * See if the job table is empty. Because the local concurrency may
1.1 deraadt 1927: * be set to 0, it is possible for the job table to become empty,
1928: * while the list of stoppedJobs remains non-empty. In such a case,
1929: * we want to restart as many jobs as we can.
1930: *
1931: * Results:
1.41 espie 1932: * true if it is. false if it ain't.
1.1 deraadt 1933: * -----------------------------------------------------------------------
1934: */
1.41 espie 1935: bool
1.56 espie 1936: Job_Empty(void)
1.1 deraadt 1937: {
1.66 espie 1938: if (nJobs == 0) {
1939: if (!Lst_IsEmpty(&stoppedJobs) && !aborting) {
1940: /*
1941: * The job table is obviously not full if it has no
1942: * jobs in it...Try and restart the stopped jobs.
1943: */
1944: jobFull = false;
1945: JobRestartJobs();
1946: return false;
1947: } else {
1948: return true;
1949: }
1.1 deraadt 1950: } else {
1.66 espie 1951: return false;
1.1 deraadt 1952: }
1953: }
1954:
1955: /*-
1956: *-----------------------------------------------------------------------
1957: * JobInterrupt --
1958: * Handle the receipt of an interrupt.
1959: *
1960: * Side Effects:
1961: * All children are killed. Another job will be started if the
1962: * .INTERRUPT target was given.
1963: *-----------------------------------------------------------------------
1964: */
1965: static void
1.56 espie 1966: JobInterrupt(int runINTERRUPT, /* Non-zero if commands for the .INTERRUPT
1.1 deraadt 1967: * target should be executed */
1.66 espie 1968: int signo) /* signal received */
1.1 deraadt 1969: {
1.66 espie 1970: LstNode ln; /* element in job table */
1.78 ! espie 1971: Job *job; /* job descriptor in that element */
1.66 espie 1972:
1973: aborting = ABORT_INTERRUPT;
1974:
1975: for (ln = Lst_First(&jobs); ln != NULL; ln = Lst_Adv(ln)) {
1976: job = (Job *)Lst_Datum(ln);
1977:
1978: if (!Targ_Precious(job->node)) {
1979: const char *file = job->node->path == NULL ?
1980: job->node->name : job->node->path;
1981: if (!noExecute && eunlink(file) != -1) {
1982: Error("*** %s removed", file);
1983: }
1984: }
1985: if (job->pid) {
1986: if (DEBUG(JOB)) {
1987: (void)fprintf(stdout,
1988: "JobInterrupt passing signal to child %ld.\n",
1989: (long)job->pid);
1990: (void)fflush(stdout);
1991: }
1992: KILL(job->pid, signo);
1993: }
1.2 deraadt 1994: }
1.1 deraadt 1995:
1.66 espie 1996: if (runINTERRUPT && !touchFlag) {
1.78 ! espie 1997: if ((interrupt_node->type & OP_DUMMY) == 0) {
1.66 espie 1998: ignoreErrors = false;
1999:
1.78 ! espie 2000: JobStart(interrupt_node, JOB_IGNDOTS, (Job *)0);
1.66 espie 2001: while (nJobs) {
2002: Job_CatchOutput();
1.76 espie 2003: Job_CatchChildren();
1.66 espie 2004: }
2005: }
1.1 deraadt 2006: }
1.66 espie 2007: (void)eunlink(tfile);
2008: exit(signo);
1.1 deraadt 2009: }
2010:
2011: /*
2012: *-----------------------------------------------------------------------
1.12 espie 2013: * Job_Finish --
1.1 deraadt 2014: * Do final processing such as the running of the commands
1.6 millert 2015: * attached to the .END target.
1.1 deraadt 2016: *
2017: * Results:
2018: * Number of errors reported.
1.40 espie 2019: *
2020: * Side Effects:
2021: * The process' temporary file (tfile) is removed if it still
2022: * existed.
1.1 deraadt 2023: *-----------------------------------------------------------------------
2024: */
2025: int
1.56 espie 2026: Job_Finish(void)
1.1 deraadt 2027: {
1.78 ! espie 2028: if (end_node != NULL && !Lst_IsEmpty(&end_node->commands)) {
1.66 espie 2029: if (errors) {
2030: Error("Errors reported so .END ignored");
2031: } else {
1.78 ! espie 2032: JobStart(end_node, JOB_SPECIAL | JOB_IGNDOTS, NULL);
1.1 deraadt 2033:
1.66 espie 2034: while (nJobs) {
2035: Job_CatchOutput();
1.76 espie 2036: Job_CatchChildren();
1.66 espie 2037: }
2038: }
1.1 deraadt 2039: }
1.66 espie 2040: (void)eunlink(tfile);
2041: return errors;
1.1 deraadt 2042: }
2043:
1.41 espie 2044: #ifdef CLEANUP
1.12 espie 2045: void
1.56 espie 2046: Job_End(void)
1.12 espie 2047: {
1.41 espie 2048: }
1.13 espie 2049: #endif
1.40 espie 2050:
1.1 deraadt 2051: /*-
2052: *-----------------------------------------------------------------------
2053: * Job_Wait --
2054: * Waits for all running jobs to finish and returns. Sets 'aborting'
2055: * to ABORT_WAIT to prevent other jobs from starting.
2056: *
2057: * Side Effects:
2058: * Currently running jobs finish.
2059: *
2060: *-----------------------------------------------------------------------
2061: */
2062: void
1.56 espie 2063: Job_Wait(void)
1.1 deraadt 2064: {
1.66 espie 2065: aborting = ABORT_WAIT;
2066: while (nJobs != 0) {
2067: Job_CatchOutput();
1.76 espie 2068: Job_CatchChildren();
1.66 espie 2069: }
2070: aborting = 0;
1.1 deraadt 2071: }
2072:
2073: /*-
2074: *-----------------------------------------------------------------------
2075: * Job_AbortAll --
2076: * Abort all currently running jobs without handling output or anything.
2077: * This function is to be called only in the event of a major
2078: * error. Most definitely NOT to be called from JobInterrupt.
2079: *
2080: * Side Effects:
2081: * All children are killed, not just the firstborn
2082: *-----------------------------------------------------------------------
2083: */
2084: void
1.56 espie 2085: Job_AbortAll(void)
1.1 deraadt 2086: {
1.66 espie 2087: LstNode ln; /* element in job table */
2088: Job *job; /* the job descriptor in that element */
2089: int foo;
1.6 millert 2090:
1.66 espie 2091: aborting = ABORT_ERROR;
1.6 millert 2092:
1.66 espie 2093: if (nJobs) {
2094: for (ln = Lst_First(&jobs); ln != NULL; ln = Lst_Adv(ln)) {
2095: job = (Job *)Lst_Datum(ln);
2096:
2097: /*
2098: * kill the child process with increasingly drastic
2099: * signals to make darn sure it's dead.
2100: */
2101: KILL(job->pid, SIGINT);
2102: KILL(job->pid, SIGKILL);
2103: }
1.1 deraadt 2104: }
1.6 millert 2105:
1.66 espie 2106: /*
2107: * Catch as many children as want to report in at first, then give up
2108: */
2109: while (waitpid(-1, &foo, WNOHANG) > 0)
2110: continue;
2111: (void)eunlink(tfile);
1.2 deraadt 2112: }
1.40 espie 2113:
1.2 deraadt 2114: /*-
2115: *-----------------------------------------------------------------------
2116: * JobRestartJobs --
2117: * Tries to restart stopped jobs if there are slots available.
2118: * Note that this tries to restart them regardless of pending errors.
2119: * It's not good to leave stopped jobs lying around!
2120: *
2121: * Side Effects:
2122: * Resumes(and possibly migrates) jobs.
2123: *-----------------------------------------------------------------------
2124: */
2125: static void
1.56 espie 2126: JobRestartJobs(void)
1.2 deraadt 2127: {
1.66 espie 2128: Job *job;
1.19 espie 2129:
1.66 espie 2130: while (!jobFull && (job = (Job *)Lst_DeQueue(&stoppedJobs)) != NULL) {
2131: if (DEBUG(JOB)) {
2132: (void)fprintf(stdout,
2133: "Job queue is not full. Restarting a stopped job.\n");
2134: (void)fflush(stdout);
2135: }
2136: JobRestart(job);
1.2 deraadt 2137: }
1.1 deraadt 2138: }
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