Annotation of src/usr.bin/make/job.c, Revision 1.63
1.40 espie 1: /* $OpenPackages$ */
1.63 ! espie 2: /* $OpenBSD: job.c,v 1.62 2007/06/12 16:33:27 cnst 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_ParseShell Given the line following a .SHELL target, parse
75: * the line as a shell specification. Returns
1.41 espie 76: * false if the spec was incorrect.
1.40 espie 77: *
78: * Job_Finish Perform any final processing which needs doing.
79: * This includes the execution of any commands
80: * which have been/were attached to the .END
81: * target. It should only be called when the
82: * job table is empty.
83: *
84: * Job_AbortAll Abort all currently running jobs. It doesn't
85: * handle output or do anything for the jobs,
86: * just kills them. It should only be called in
87: * an emergency, as it were.
1.1 deraadt 88: *
1.40 espie 89: * Job_CheckCommands Verify that the commands for a target are
90: * ok. Provide them if necessary and possible.
1.1 deraadt 91: *
1.40 espie 92: * Job_Touch Update a target without really updating it.
1.1 deraadt 93: *
1.40 espie 94: * Job_Wait Wait for all currently-running jobs to finish.
1.1 deraadt 95: */
96:
97: #include <sys/types.h>
98: #include <sys/wait.h>
1.41 espie 99: #include <ctype.h>
100: #include <errno.h>
1.1 deraadt 101: #include <fcntl.h>
1.41 espie 102: #include <signal.h>
1.36 espie 103: #include <stddef.h>
1.1 deraadt 104: #include <stdio.h>
1.42 espie 105: #include <stdlib.h>
1.1 deraadt 106: #include <string.h>
1.41 espie 107: #include <unistd.h>
108: #include "config.h"
109: #include "defines.h"
1.1 deraadt 110: #include "job.h"
1.63 ! espie 111: #include "engine.h"
1.1 deraadt 112: #include "pathnames.h"
1.41 espie 113: #include "var.h"
114: #include "targ.h"
115: #include "error.h"
116: #include "lst.h"
117: #include "extern.h"
118: #include "gnode.h"
119: #include "memory.h"
120: #include "make.h"
1.63 ! espie 121: #include "str.h"
1.41 espie 122:
1.50 espie 123: #define TMPPAT "/tmp/makeXXXXXXXXXX"
124:
125: /*
126: * The SEL_ constants determine the maximum amount of time spent in select
127: * before coming out to see if a child has finished. SEL_SEC is the number of
128: * seconds and SEL_USEC is the number of micro-seconds
129: */
130: #define SEL_SEC 0
131: #define SEL_USEC 500000
132:
133:
134: /*-
135: * Job Table definitions.
136: *
137: * Each job has several things associated with it:
138: * 1) The process id of the child shell
139: * 2) The graph node describing the target being made by this job
140: * 3) A LstNode for the first command to be saved after the job
141: * completes. This is NULL if there was no "..." in the job's
142: * commands.
143: * 4) An FILE* for writing out the commands. This is only
144: * used before the job is actually started.
145: * 5) A union of things used for handling the shell's output. Different
146: * parts of the union are used based on the value of the usePipes
147: * flag. If it is true, the output is being caught via a pipe and
148: * the descriptors of our pipe, an array in which output is line
149: * buffered and the current position in that buffer are all
150: * maintained for each job. If, on the other hand, usePipes is false,
151: * the output is routed to a temporary file and all that is kept
152: * is the name of the file and the descriptor open to the file.
153: * 6) An identifier provided by and for the exclusive use of the
154: * Rmt module.
155: * 7) A word of flags which determine how the module handles errors,
156: * echoing, etc. for the job
157: *
158: * The job "table" is kept as a linked Lst in 'jobs', with the number of
159: * active jobs maintained in the 'nJobs' variable. At no time will this
160: * exceed the value of 'maxJobs', initialized by the Job_Init function.
161: *
162: * When a job is finished, the Make_Update function is called on each of the
163: * parents of the node which was just remade. This takes care of the upward
164: * traversal of the dependency graph.
165: */
166: #define JOB_BUFSIZE 1024
167: typedef struct Job_ {
1.51 mpech 168: pid_t pid; /* The child's process ID */
1.50 espie 169: GNode *node; /* The target the child is making */
170: LstNode tailCmds; /* The node of the first command to be
171: * saved when the job has been run */
172: FILE *cmdFILE; /* When creating the shell script, this is
173: * where the commands go */
174: int rmtID; /* ID returned from Rmt module */
175: short flags; /* Flags to control treatment of job */
176: #define JOB_IGNERR 0x001 /* Ignore non-zero exits */
177: #define JOB_SILENT 0x002 /* no output */
178: #define JOB_SPECIAL 0x004 /* Target is a special one. i.e. run it locally
179: * if we can't export it and maxLocal is 0 */
180: #define JOB_IGNDOTS 0x008 /* Ignore "..." lines when processing
181: * commands */
182: #define JOB_FIRST 0x020 /* Job is first job for the node */
183: #define JOB_RESTART 0x080 /* Job needs to be completely restarted */
184: #define JOB_RESUME 0x100 /* Job needs to be resumed b/c it stopped,
185: * for some reason */
186: #define JOB_CONTINUING 0x200 /* We are in the process of resuming this job.
187: * Used to avoid infinite recursion between
188: * JobFinish and JobRestart */
189: union {
190: struct {
191: int op_inPipe; /* Input side of pipe associated
192: * with job's output channel */
193: int op_outPipe; /* Output side of pipe associated with
194: * job's output channel */
195: char op_outBuf[JOB_BUFSIZE + 1];
196: /* Buffer for storing the output of the
197: * job, line by line */
198: int op_curPos; /* Current position in op_outBuf */
199: } o_pipe; /* data used when catching the output via
200: * a pipe */
201: struct {
202: char of_outFile[sizeof(TMPPAT)];
203: /* Name of file to which shell output
204: * was rerouted */
205: int of_outFd; /* Stream open to the output
206: * file. Used to funnel all
207: * from a single job to one file
208: * while still allowing
209: * multiple shell invocations */
210: } o_file; /* Data used when catching the output in
211: * a temporary file */
212: } output; /* Data for tracking a shell's output */
213: } Job;
214:
215: #define outPipe output.o_pipe.op_outPipe
216: #define inPipe output.o_pipe.op_inPipe
217: #define outBuf output.o_pipe.op_outBuf
218: #define curPos output.o_pipe.op_curPos
219: #define outFile output.o_file.of_outFile
220: #define outFd output.o_file.of_outFd
221:
222:
223: /*-
224: * Shell Specifications:
225: * Each shell type has associated with it the following information:
226: * 1) The string which must match the last character of the shell name
227: * for the shell to be considered of this type. The longest match
228: * wins.
229: * 2) A command to issue to turn off echoing of command lines
230: * 3) A command to issue to turn echoing back on again
231: * 4) What the shell prints, and its length, when given the echo-off
232: * command. This line will not be printed when received from the shell
233: * 5) A boolean to tell if the shell has the ability to control
234: * error checking for individual commands.
235: * 6) The string to turn this checking on.
236: * 7) The string to turn it off.
237: * 8) The command-flag to give to cause the shell to start echoing
238: * commands right away.
239: * 9) The command-flag to cause the shell to Lib_Exit when an error is
240: * detected in one of the commands.
241: *
242: * Some special stuff goes on if a shell doesn't have error control. In such
243: * a case, errCheck becomes a printf template for echoing the command,
244: * should echoing be on and ignErr becomes another printf template for
245: * executing the command while ignoring the return status. If either of these
246: * strings is empty when hasErrCtl is false, the command will be executed
247: * anyway as is and if it causes an error, so be it.
248: */
249: typedef struct Shell_ {
250: char *name; /* the name of the shell. For Bourne and C
251: * shells, this is used only to find the
252: * shell description when used as the single
253: * source of a .SHELL target. For user-defined
254: * shells, this is the full path of the shell.
255: */
256: bool hasEchoCtl; /* True if both echoOff and echoOn defined */
257: char *echoOff; /* command to turn off echo */
258: char *echoOn; /* command to turn it back on again */
259: char *noPrint; /* command to skip when printing output from
260: * shell. This is usually the command which
261: * was executed to turn off echoing */
262: int noPLen; /* length of noPrint command */
263: bool hasErrCtl; /* set if can control error checking for
264: * individual commands */
265: char *errCheck; /* string to turn error checking on */
266: char *ignErr; /* string to turn off error checking */
267: /*
268: * command-line flags
269: */
270: char *echo; /* echo commands */
271: char *exit; /* exit on error */
272: } Shell;
273:
1.1 deraadt 274: /*
1.6 millert 275: * error handling variables
1.1 deraadt 276: */
1.40 espie 277: static int errors = 0; /* number of errors reported */
278: static int aborting = 0; /* why is the make aborting? */
279: #define ABORT_ERROR 1 /* Because of an error */
280: #define ABORT_INTERRUPT 2 /* Because it was interrupted */
281: #define ABORT_WAIT 3 /* Waiting for jobs to finish */
1.1 deraadt 282:
1.6 millert 283: /*
1.2 deraadt 284: * XXX: Avoid SunOS bug... FILENO() is fp->_file, and file
285: * is a char! So when we go above 127 we turn negative!
286: */
287: #define FILENO(a) ((unsigned) fileno(a))
1.1 deraadt 288:
289: /*
290: * post-make command processing. The node postCommands is really just the
291: * .END target but we keep it around to avoid having to search for it
292: * all the time.
293: */
1.40 espie 294: static GNode *postCommands; /* node containing commands to execute when
1.1 deraadt 295: * everything else is done */
1.40 espie 296: static int numCommands; /* The number of commands actually printed
1.1 deraadt 297: * for a target. Should this number be
298: * 0, no shell will be executed. */
299:
300: /*
301: * Return values from JobStart.
302: */
1.40 espie 303: #define JOB_RUNNING 0 /* Job is running */
304: #define JOB_ERROR 1 /* Error in starting the job */
305: #define JOB_FINISHED 2 /* The job is already finished */
306: #define JOB_STOPPED 3 /* The job is stopped */
1.1 deraadt 307:
308: /*
1.40 espie 309: * tfile is the name of a file into which all shell commands are put. It is
310: * used over by removing it before the child shell is executed. The XXXXXXXXXX
311: * in the string are replaced by mkstemp(3).
1.1 deraadt 312: */
1.40 espie 313: static char tfile[sizeof(TMPPAT)];
1.1 deraadt 314:
315:
316: /*
317: * Descriptions for various shells.
318: */
1.40 espie 319: static Shell shells[] = {
1.1 deraadt 320: /*
321: * CSH description. The csh can do echo control by playing
322: * with the setting of the 'echo' shell variable. Sadly,
323: * however, it is unable to do error control nicely.
324: */
325: {
326: "csh",
1.41 espie 327: true, "unset verbose", "set verbose", "unset verbose", 10,
328: false, "echo \"%s\"\n", "csh -c \"%s || exit 0\"",
1.1 deraadt 329: "v", "e",
330: },
331: /*
332: * SH description. Echo control is also possible and, under
333: * sun UNIX anyway, one can even control error checking.
334: */
335: {
336: "sh",
1.41 espie 337: true, "set -", "set -v", "set -", 5,
338: true, "set -e", "set +e",
1.2 deraadt 339: #ifdef OLDBOURNESHELL
1.41 espie 340: false, "echo \"%s\"\n", "sh -c '%s || exit 0'\n",
1.2 deraadt 341: #endif
1.1 deraadt 342: "v", "e",
343: },
344: /*
345: * UNKNOWN.
346: */
347: {
1.40 espie 348: (char *)0,
1.41 espie 349: false, (char *)0, (char *)0, (char *)0, 0,
350: false, (char *)0, (char *)0,
1.40 espie 351: (char *)0, (char *)0,
1.1 deraadt 352: }
353: };
1.40 espie 354: static Shell *commandShell = &shells[DEFSHELL];/* this is the shell to
1.1 deraadt 355: * which we pass all
356: * commands in the Makefile.
357: * It is set by the
358: * Job_ParseShell function */
1.40 espie 359: static char *shellPath = NULL, /* full pathname of
1.1 deraadt 360: * executable image */
1.40 espie 361: *shellName = NULL, /* last component of shell */
1.12 espie 362: *shellArgv = NULL; /* Custom shell args */
1.1 deraadt 363:
364:
1.40 espie 365: static int maxJobs; /* The most children we can run at once */
366: static int maxLocal; /* The most local ones we can have */
1.48 espie 367: static int nJobs = 0; /* The number of children currently running */
368: static int nLocal; /* The number of local children */
369: static LIST jobs; /* The structures that describe them */
370: static bool jobFull; /* Flag to tell when the job table is full. It
1.41 espie 371: * is set true when (1) the total number of
1.1 deraadt 372: * running jobs equals the maximum allowed or
373: * (2) a job can only be run locally, but
374: * nLocal equals maxLocal */
1.40 espie 375: static fd_set *outputsp; /* Set of descriptors of pipes connected to
1.1 deraadt 376: * the output channels of children */
1.8 deraadt 377: static int outputsn;
1.48 espie 378: static GNode *lastNode; /* The node for which output was most recently
1.1 deraadt 379: * produced. */
1.48 espie 380: static char *targFmt; /* Format string to use to head output from a
1.1 deraadt 381: * job when it's not the most-recent job heard
382: * from */
1.2 deraadt 383:
384: # define TARG_FMT "--- %s ---\n" /* Default format */
385: # define MESSAGE(fp, gn) \
1.40 espie 386: (void)fprintf(fp, targFmt, gn->name);
1.1 deraadt 387:
388: /*
1.50 espie 389: * When JobStart attempts to run a job but isn't allowed to,
390: * the job is placed on the stoppedJobs queue to be run
1.6 millert 391: * when the next job finishes.
1.1 deraadt 392: */
1.48 espie 393: static LIST stoppedJobs; /* Lst of Job structures describing
1.1 deraadt 394: * jobs that were stopped due to concurrency
395: * limits or migration home */
396:
397:
398: #if defined(USE_PGRP) && defined(SYSV)
1.40 espie 399: # define KILL(pid, sig) killpg(-(pid), (sig))
1.1 deraadt 400: #else
401: # if defined(USE_PGRP)
1.2 deraadt 402: # define KILL(pid, sig) killpg((pid), (sig))
1.1 deraadt 403: # else
1.2 deraadt 404: # define KILL(pid, sig) kill((pid), (sig))
1.1 deraadt 405: # endif
406: #endif
407:
1.6 millert 408: /*
1.2 deraadt 409: * Grmpf... There is no way to set bits of the wait structure
410: * anymore with the stupid W*() macros. I liked the union wait
411: * stuff much more. So, we devise our own macros... This is
412: * really ugly, use dramamine sparingly. You have been warned.
413: */
414: #define W_SETMASKED(st, val, fun) \
415: { \
416: int sh = (int) ~0; \
417: int mask = fun(sh); \
418: \
419: for (sh = 0; ((mask >> sh) & 1) == 0; sh++) \
420: continue; \
421: *(st) = (*(st) & ~mask) | ((val) << sh); \
422: }
423:
424: #define W_SETTERMSIG(st, val) W_SETMASKED(st, val, WTERMSIG)
425: #define W_SETEXITSTATUS(st, val) W_SETMASKED(st, val, WEXITSTATUS)
426:
427:
1.40 espie 428: static void JobCondPassSig(void *, void *);
1.57 espie 429: static void SigHandler(int);
430: static void HandleSigs(void);
1.40 espie 431: static void JobPassSig(int);
432: static int JobCmpPid(void *, void *);
1.60 espie 433: static int JobPrintCommand(LstNode, void *);
1.40 espie 434: static void JobSaveCommand(void *, void *);
435: static void JobClose(Job *);
436: static void JobFinish(Job *, int *);
437: static void JobExec(Job *, char **);
438: static void JobMakeArgv(Job *, char **);
439: static void JobRestart(Job *);
440: static int JobStart(GNode *, int, Job *);
441: static char *JobOutput(Job *, char *, char *, int);
1.41 espie 442: static void JobDoOutput(Job *, bool);
1.40 espie 443: static Shell *JobMatchShell(char *);
444: static void JobInterrupt(int, int);
445: static void JobRestartJobs(void);
1.1 deraadt 446:
1.57 espie 447: static volatile sig_atomic_t got_SIGINT, got_SIGHUP, got_SIGQUIT,
448: got_SIGTERM;
449: #if defined(USE_PGRP)
450: static volatile sig_atomic_t got_SIGTSTP, got_SIGTTOU, got_SIGTTIN,
451: got_SIGWINCH;
452: #endif
453:
454: static void
455: SigHandler(int sig)
456: {
457: switch(sig) {
458: case SIGINT:
459: got_SIGINT++;
460: break;
461: case SIGHUP:
462: got_SIGHUP++;
463: break;
464: case SIGQUIT:
465: got_SIGQUIT++;
466: break;
467: case SIGTERM:
468: got_SIGTERM++;
469: break;
470: #if defined(USE_PGRGP)
471: case SIGTSTP:
472: got_SIGTSTP++;
473: break;
474: case SIGTTOU:
475: got_SIGTTOU++;
476: break;
477: case SIGTTIN:
478: got_SIGTTIN++;
479: break;
480: case SIGWINCH:
481: got_SIGWINCH++;
482: break;
483: #endif
484: }
485: }
486:
487: static void
488: HandleSigs()
489: {
490: if (got_SIGINT) {
491: got_SIGINT=0;
492: JobPassSig(SIGINT);
493: }
494: if (got_SIGHUP) {
495: got_SIGHUP=0;
496: JobPassSig(SIGHUP);
497: }
498: if (got_SIGQUIT) {
499: got_SIGQUIT=0;
500: JobPassSig(SIGQUIT);
501: }
502: if (got_SIGTERM) {
503: got_SIGTERM=0;
504: JobPassSig(SIGTERM);
505: }
506: #if defined(USE_PGRP)
507: if (got_SIGTSTP) {
508: got_SIGTSTP=0;
509: JobPassSig(SIGTSTP);
510: }
511: if (got_SIGTTOU) {
512: got_SIGTTOU=0;
513: JobPassSig(SIGTTOU);
514: }
515: if (got_SIGTTIN) {
516: got_SIGTTIN=0;
517: JobPassSig(SIGTTIN);
518: }
519: if (got_SIGWINCH) {
520: got_SIGWINCH=0;
521: JobPassSig(SIGWINCH);
522: }
523: #endif
524: }
525:
1.1 deraadt 526: /*-
527: *-----------------------------------------------------------------------
528: * JobCondPassSig --
1.50 espie 529: * Pass a signal to a job if USE_PGRP
1.1 deraadt 530: * is defined.
531: *
532: * Side Effects:
533: * None, except the job may bite it.
534: *-----------------------------------------------------------------------
535: */
1.27 espie 536: static void
1.56 espie 537: JobCondPassSig(void *jobp, /* Job to biff */
538: void *signop) /* Signal to send it */
1.1 deraadt 539: {
1.40 espie 540: Job *job = (Job *)jobp;
541: int signo = *(int *)signop;
1.2 deraadt 542: if (DEBUG(JOB)) {
1.40 espie 543: (void)fprintf(stdout,
1.51 mpech 544: "JobCondPassSig passing signal %d to child %ld.\n",
545: signo, (long)job->pid);
1.40 espie 546: (void)fflush(stdout);
1.2 deraadt 547: }
1.1 deraadt 548: KILL(job->pid, signo);
549: }
550:
551: /*-
552: *-----------------------------------------------------------------------
553: * JobPassSig --
1.50 espie 554: * Pass a signal to all local jobs if USE_PGRP is defined,
555: * then die ourselves.
1.1 deraadt 556: *
557: * Side Effects:
558: * We die by the same signal.
559: *-----------------------------------------------------------------------
560: */
561: static void
1.56 espie 562: JobPassSig(int signo) /* The signal number we've received */
1.1 deraadt 563: {
1.2 deraadt 564: sigset_t nmask, omask;
1.3 niklas 565: struct sigaction act;
1.6 millert 566:
1.2 deraadt 567: if (DEBUG(JOB)) {
1.40 espie 568: (void)fprintf(stdout, "JobPassSig(%d) called.\n", signo);
569: (void)fflush(stdout);
1.2 deraadt 570: }
1.29 espie 571: Lst_ForEach(&jobs, JobCondPassSig, &signo);
1.1 deraadt 572:
573: /*
574: * Deal with proper cleanup based on the signal received. We only run
575: * the .INTERRUPT target if the signal was in fact an interrupt. The other
576: * three termination signals are more of a "get out *now*" command.
577: */
578: if (signo == SIGINT) {
1.41 espie 579: JobInterrupt(true, signo);
1.40 espie 580: } else if (signo == SIGHUP || signo == SIGTERM || signo == SIGQUIT) {
1.41 espie 581: JobInterrupt(false, signo);
1.1 deraadt 582: }
1.6 millert 583:
1.1 deraadt 584: /*
585: * Leave gracefully if SIGQUIT, rather than core dumping.
586: */
587: if (signo == SIGQUIT) {
588: Finish(0);
589: }
1.6 millert 590:
1.1 deraadt 591: /*
592: * Send ourselves the signal now we've given the message to everyone else.
593: * Note we block everything else possible while we're getting the signal.
594: * This ensures that all our jobs get continued when we wake up before
595: * we take any other signal.
596: */
1.3 niklas 597: sigemptyset(&nmask);
598: sigaddset(&nmask, signo);
599: sigprocmask(SIG_SETMASK, &nmask, &omask);
1.10 deraadt 600: memset(&act, 0, sizeof act);
1.3 niklas 601: act.sa_handler = SIG_DFL;
602: sigemptyset(&act.sa_mask);
603: act.sa_flags = 0;
604: sigaction(signo, &act, NULL);
1.2 deraadt 605:
606: if (DEBUG(JOB)) {
1.40 espie 607: (void)fprintf(stdout,
1.2 deraadt 608: "JobPassSig passing signal to self, mask = %x.\n",
609: ~0 & ~(1 << (signo-1)));
1.40 espie 610: (void)fflush(stdout);
1.2 deraadt 611: }
1.40 espie 612: (void)signal(signo, SIG_DFL);
1.1 deraadt 613:
1.40 espie 614: (void)KILL(getpid(), signo);
1.1 deraadt 615:
616: signo = SIGCONT;
1.29 espie 617: Lst_ForEach(&jobs, JobCondPassSig, &signo);
1.1 deraadt 618:
1.40 espie 619: (void)sigprocmask(SIG_SETMASK, &omask, NULL);
1.3 niklas 620: sigprocmask(SIG_SETMASK, &omask, NULL);
1.57 espie 621: act.sa_handler = SigHandler;
1.3 niklas 622: sigaction(signo, &act, NULL);
1.1 deraadt 623: }
624:
625: /*-
626: *-----------------------------------------------------------------------
627: * JobCmpPid --
628: * Compare the pid of the job with the given pid and return 0 if they
629: * are equal. This function is called from Job_CatchChildren via
630: * Lst_Find to find the job descriptor of the finished job.
631: *
632: * Results:
633: * 0 if the pid's match
634: *-----------------------------------------------------------------------
635: */
636: static int
1.56 espie 637: JobCmpPid(void *job, /* job to examine */
638: void *pid) /* process id desired */
1.1 deraadt 639: {
1.51 mpech 640: return *(pid_t *)pid - ((Job *)job)->pid;
1.1 deraadt 641: }
642:
643: /*-
644: *-----------------------------------------------------------------------
645: * JobPrintCommand --
646: * Put out another command for the given job. If the command starts
647: * with an @ or a - we process it specially. In the former case,
648: * so long as the -s and -n flags weren't given to make, we stick
649: * a shell-specific echoOff command in the script. In the latter,
650: * we ignore errors for the entire job, unless the shell has error
651: * control.
652: * If the command is just "..." we take all future commands for this
653: * job to be commands to be executed once the entire graph has been
654: * made and return non-zero to signal that the end of the commands
655: * was reached. These commands are later attached to the postCommands
656: * node and executed by Job_End when all things are done.
1.40 espie 657: * This function is called from JobStart via Lst_Find
1.1 deraadt 658: *
659: * Results:
1.26 espie 660: * Always 1, unless the command was "..."
1.1 deraadt 661: *
662: * Side Effects:
663: * If the command begins with a '-' and the shell has no error control,
664: * the JOB_IGNERR flag is set in the job descriptor.
665: * If the command is "..." and we're not ignoring such things,
666: * tailCmds is set to the successor node of the cmd.
667: * numCommands is incremented if the command is actually printed.
668: *-----------------------------------------------------------------------
669: */
670: static int
1.60 espie 671: JobPrintCommand(LstNode cmdNode, /* command string to print */
1.56 espie 672: void *jobp) /* job for which to print it */
1.1 deraadt 673: {
1.41 espie 674: bool noSpecials; /* true if we shouldn't worry about
1.1 deraadt 675: * inserting special commands into
676: * the input stream. */
1.41 espie 677: bool shutUp = false; /* true if we put a no echo command
1.1 deraadt 678: * into the command file */
1.41 espie 679: bool errOff = false; /* true if we turned error checking
1.1 deraadt 680: * off before printing the command
681: * and need to turn it back on */
1.40 espie 682: char *cmdTemplate; /* Template to use when printing the
1.1 deraadt 683: * command */
1.40 espie 684: char *cmdStart; /* Start of expanded command */
1.60 espie 685: char *cmd = (char *)Lst_Datum(cmdNode);
1.40 espie 686: Job *job = (Job *)jobp;
1.1 deraadt 687:
1.2 deraadt 688: noSpecials = (noExecute && !(job->node->type & OP_MAKE));
1.1 deraadt 689:
1.2 deraadt 690: if (strcmp(cmd, "...") == 0) {
1.6 millert 691: job->node->type |= OP_SAVE_CMDS;
1.1 deraadt 692: if ((job->flags & JOB_IGNDOTS) == 0) {
1.60 espie 693: job->tailCmds = Lst_Succ(cmdNode);
1.26 espie 694: return 0;
1.2 deraadt 695: }
1.26 espie 696: return 1;
1.1 deraadt 697: }
698:
1.2 deraadt 699: #define DBPRINTF(fmt, arg) if (DEBUG(JOB)) { \
1.40 espie 700: (void)fprintf(stdout, fmt, arg); \
701: (void)fflush(stdout); \
1.2 deraadt 702: } \
1.40 espie 703: (void)fprintf(job->cmdFILE, fmt, arg); \
704: (void)fflush(job->cmdFILE);
1.1 deraadt 705:
706: numCommands += 1;
707:
1.40 espie 708: /* For debugging, we replace each command with the result of expanding
709: * the variables in the command. */
1.41 espie 710: cmdStart = cmd = Var_Subst(cmd, &job->node->context, false);
1.25 espie 711: Lst_Replace(cmdNode, cmdStart);
1.1 deraadt 712:
713: cmdTemplate = "%s\n";
714:
715: /*
716: * Check for leading @' and -'s to control echoing and error checking.
717: */
1.34 espie 718: for (;; cmd++) {
1.40 espie 719: if (*cmd == '@')
1.41 espie 720: shutUp = DEBUG(LOUD) ? false : true;
1.34 espie 721: else if (*cmd == '-')
1.41 espie 722: errOff = true;
1.34 espie 723: else if (*cmd != '+')
724: break;
1.1 deraadt 725: }
726:
1.40 espie 727: while (isspace(*cmd))
1.1 deraadt 728: cmd++;
729:
730: if (shutUp) {
1.2 deraadt 731: if (!(job->flags & JOB_SILENT) && !noSpecials &&
1.1 deraadt 732: commandShell->hasEchoCtl) {
1.2 deraadt 733: DBPRINTF("%s\n", commandShell->echoOff);
1.1 deraadt 734: } else {
1.41 espie 735: shutUp = false;
1.1 deraadt 736: }
737: }
738:
739: if (errOff) {
1.2 deraadt 740: if ( !(job->flags & JOB_IGNERR) && !noSpecials) {
1.1 deraadt 741: if (commandShell->hasErrCtl) {
742: /*
743: * we don't want the error-control commands showing
744: * up either, so we turn off echoing while executing
745: * them. We could put another field in the shell
746: * structure to tell JobDoOutput to look for this
747: * string too, but why make it any more complex than
748: * it already is?
749: */
1.2 deraadt 750: if (!(job->flags & JOB_SILENT) && !shutUp &&
1.1 deraadt 751: commandShell->hasEchoCtl) {
1.2 deraadt 752: DBPRINTF("%s\n", commandShell->echoOff);
753: DBPRINTF("%s\n", commandShell->ignErr);
754: DBPRINTF("%s\n", commandShell->echoOn);
1.1 deraadt 755: } else {
1.2 deraadt 756: DBPRINTF("%s\n", commandShell->ignErr);
1.1 deraadt 757: }
758: } else if (commandShell->ignErr &&
1.2 deraadt 759: (*commandShell->ignErr != '\0'))
1.1 deraadt 760: {
761: /*
762: * The shell has no error control, so we need to be
763: * weird to get it to ignore any errors from the command.
764: * If echoing is turned on, we turn it off and use the
765: * errCheck template to echo the command. Leave echoing
766: * off so the user doesn't see the weirdness we go through
767: * to ignore errors. Set cmdTemplate to use the weirdness
768: * instead of the simple "%s\n" template.
769: */
1.2 deraadt 770: if (!(job->flags & JOB_SILENT) && !shutUp &&
1.1 deraadt 771: commandShell->hasEchoCtl) {
1.2 deraadt 772: DBPRINTF("%s\n", commandShell->echoOff);
773: DBPRINTF(commandShell->errCheck, cmd);
1.41 espie 774: shutUp = true;
1.1 deraadt 775: }
776: cmdTemplate = commandShell->ignErr;
777: /*
1.6 millert 778: * The error ignoration (hee hee) is already taken care
1.1 deraadt 779: * of by the ignErr template, so pretend error checking
780: * is still on.
781: */
1.41 espie 782: errOff = false;
1.1 deraadt 783: } else {
1.41 espie 784: errOff = false;
1.1 deraadt 785: }
786: } else {
1.41 espie 787: errOff = false;
1.1 deraadt 788: }
789: }
1.6 millert 790:
1.2 deraadt 791: DBPRINTF(cmdTemplate, cmd);
1.6 millert 792:
1.1 deraadt 793: if (errOff) {
794: /*
795: * If echoing is already off, there's no point in issuing the
796: * echoOff command. Otherwise we issue it and pretend it was on
797: * for the whole command...
798: */
799: if (!shutUp && !(job->flags & JOB_SILENT) && commandShell->hasEchoCtl){
1.2 deraadt 800: DBPRINTF("%s\n", commandShell->echoOff);
1.41 espie 801: shutUp = true;
1.1 deraadt 802: }
1.2 deraadt 803: DBPRINTF("%s\n", commandShell->errCheck);
1.1 deraadt 804: }
805: if (shutUp) {
1.2 deraadt 806: DBPRINTF("%s\n", commandShell->echoOn);
1.1 deraadt 807: }
1.26 espie 808: return 1;
1.1 deraadt 809: }
810:
811: /*-
812: *-----------------------------------------------------------------------
813: * JobSaveCommand --
814: * Save a command to be executed when everything else is done.
815: * Callback function for JobFinish...
816: *
817: * Side Effects:
818: * The command is tacked onto the end of postCommands's commands list.
819: *-----------------------------------------------------------------------
820: */
1.27 espie 821: static void
1.56 espie 822: JobSaveCommand(void *cmd, void *gn)
1.1 deraadt 823: {
1.40 espie 824: GNode *g = (GNode *)gn;
825: char *result;
1.28 espie 826:
1.41 espie 827: result = Var_Subst((char *)cmd, &g->context, false);
1.29 espie 828: Lst_AtEnd(&postCommands->commands, result);
1.2 deraadt 829: }
830:
831:
832: /*-
833: *-----------------------------------------------------------------------
834: * JobClose --
835: * Called to close both input and output pipes when a job is finished.
836: *
837: * Side Effects:
838: * The file descriptors associated with the job are closed.
839: *-----------------------------------------------------------------------
840: */
841: static void
1.56 espie 842: JobClose(Job *job)
1.2 deraadt 843: {
844: if (usePipes) {
1.8 deraadt 845: FD_CLR(job->inPipe, outputsp);
1.2 deraadt 846: if (job->outPipe != job->inPipe) {
1.40 espie 847: (void)close(job->outPipe);
1.2 deraadt 848: }
1.41 espie 849: JobDoOutput(job, true);
1.40 espie 850: (void)close(job->inPipe);
1.2 deraadt 851: } else {
1.40 espie 852: (void)close(job->outFd);
1.41 espie 853: JobDoOutput(job, true);
1.2 deraadt 854: }
1.1 deraadt 855: }
856:
857: /*-
858: *-----------------------------------------------------------------------
859: * JobFinish --
860: * Do final processing for the given job including updating
861: * parents and starting new jobs as available/necessary. Note
862: * that we pay no attention to the JOB_IGNERR flag here.
863: * This is because when we're called because of a noexecute flag
864: * or something, jstat.w_status is 0 and when called from
865: * Job_CatchChildren, the status is zeroed if it s/b ignored.
866: *
867: * Side Effects:
868: * Some nodes may be put on the toBeMade queue.
869: * Final commands for the job are placed on postCommands.
870: *
1.6 millert 871: * If we got an error and are aborting (aborting == ABORT_ERROR) and
1.1 deraadt 872: * the job list is now empty, we are done for the day.
1.6 millert 873: * If we recognized an error (errors !=0), we set the aborting flag
1.1 deraadt 874: * to ABORT_ERROR so no more jobs will be started.
875: *-----------------------------------------------------------------------
876: */
877: /*ARGSUSED*/
878: static void
1.56 espie 879: JobFinish(Job *job, /* job to finish */
880: int *status) /* sub-why job went away */
1.2 deraadt 881: {
1.41 espie 882: bool done;
1.2 deraadt 883:
884: if ((WIFEXITED(*status) &&
1.40 espie 885: WEXITSTATUS(*status) != 0 && !(job->flags & JOB_IGNERR)) ||
886: (WIFSIGNALED(*status) && WTERMSIG(*status) != SIGCONT))
1.1 deraadt 887: {
888: /*
889: * If it exited non-zero and either we're doing things our
890: * way or we're not ignoring errors, the job is finished.
891: * Similarly, if the shell died because of a signal
892: * the job is also finished. In these
893: * cases, finish out the job's output before printing the exit
894: * status...
895: */
1.2 deraadt 896: JobClose(job);
1.1 deraadt 897: if (job->cmdFILE != NULL && job->cmdFILE != stdout) {
1.40 espie 898: (void)fclose(job->cmdFILE);
1.1 deraadt 899: }
1.41 espie 900: done = true;
1.2 deraadt 901: } else if (WIFEXITED(*status)) {
1.1 deraadt 902: /*
903: * Deal with ignored errors in -B mode. We need to print a message
904: * telling of the ignored error as well as setting status.w_status
905: * to 0 so the next command gets run. To do this, we set done to be
1.41 espie 906: * true if in -B mode and the job exited non-zero.
1.2 deraadt 907: */
908: done = WEXITSTATUS(*status) != 0;
1.6 millert 909: /*
1.2 deraadt 910: * Old comment said: "Note we don't
1.1 deraadt 911: * want to close down any of the streams until we know we're at the
1.2 deraadt 912: * end."
913: * But we do. Otherwise when are we going to print the rest of the
914: * stuff?
915: */
916: JobClose(job);
1.1 deraadt 917: } else {
918: /*
919: * No need to close things down or anything.
920: */
1.41 espie 921: done = false;
1.1 deraadt 922: }
1.6 millert 923:
1.1 deraadt 924: if (done ||
1.2 deraadt 925: WIFSTOPPED(*status) ||
1.40 espie 926: (WIFSIGNALED(*status) && WTERMSIG(*status) == SIGCONT) ||
1.1 deraadt 927: DEBUG(JOB))
928: {
929: FILE *out;
1.6 millert 930:
1.2 deraadt 931: if (compatMake && !usePipes && (job->flags & JOB_IGNERR)) {
1.1 deraadt 932: /*
933: * If output is going to a file and this job is ignoring
934: * errors, arrange to have the exit status sent to the
935: * output file as well.
936: */
1.2 deraadt 937: out = fdopen(job->outFd, "w");
1.1 deraadt 938: } else {
939: out = stdout;
940: }
941:
1.2 deraadt 942: if (WIFEXITED(*status)) {
943: if (DEBUG(JOB)) {
1.51 mpech 944: (void)fprintf(stdout, "Process %ld exited.\n", (long)job->pid);
1.40 espie 945: (void)fflush(stdout);
1.2 deraadt 946: }
947: if (WEXITSTATUS(*status) != 0) {
1.1 deraadt 948: if (usePipes && job->node != lastNode) {
1.2 deraadt 949: MESSAGE(out, job->node);
1.1 deraadt 950: lastNode = job->node;
951: }
1.40 espie 952: (void)fprintf(out, "*** Error code %d%s\n",
1.2 deraadt 953: WEXITSTATUS(*status),
954: (job->flags & JOB_IGNERR) ? "(ignored)" : "");
1.1 deraadt 955:
956: if (job->flags & JOB_IGNERR) {
1.2 deraadt 957: *status = 0;
1.1 deraadt 958: }
959: } else if (DEBUG(JOB)) {
960: if (usePipes && job->node != lastNode) {
1.2 deraadt 961: MESSAGE(out, job->node);
1.1 deraadt 962: lastNode = job->node;
963: }
1.40 espie 964: (void)fprintf(out, "*** Completed successfully\n");
1.2 deraadt 965: }
966: } else if (WIFSTOPPED(*status)) {
967: if (DEBUG(JOB)) {
1.51 mpech 968: (void)fprintf(stdout, "Process %ld stopped.\n", (long)job->pid);
1.40 espie 969: (void)fflush(stdout);
1.1 deraadt 970: }
971: if (usePipes && job->node != lastNode) {
1.2 deraadt 972: MESSAGE(out, job->node);
1.1 deraadt 973: lastNode = job->node;
974: }
1.49 espie 975: (void)fprintf(out, "*** Stopped -- signal %d\n",
976: WSTOPSIG(*status));
1.1 deraadt 977: job->flags |= JOB_RESUME;
1.29 espie 978: Lst_AtEnd(&stoppedJobs, job);
1.40 espie 979: (void)fflush(out);
1.1 deraadt 980: return;
1.2 deraadt 981: } else if (WTERMSIG(*status) == SIGCONT) {
1.1 deraadt 982: /*
983: * If the beastie has continued, shift the Job from the stopped
1.6 millert 984: * list to the running one (or re-stop it if concurrency is
1.1 deraadt 985: * exceeded) and go and get another child.
986: */
1.49 espie 987: if (job->flags & (JOB_RESUME|JOB_RESTART)) {
1.1 deraadt 988: if (usePipes && job->node != lastNode) {
1.2 deraadt 989: MESSAGE(out, job->node);
1.1 deraadt 990: lastNode = job->node;
991: }
1.40 espie 992: (void)fprintf(out, "*** Continued\n");
1.1 deraadt 993: }
1.2 deraadt 994: if (!(job->flags & JOB_CONTINUING)) {
995: if (DEBUG(JOB)) {
1.40 espie 996: (void)fprintf(stdout,
1.51 mpech 997: "Warning: process %ld was not continuing.\n",
998: (long)job->pid);
1.40 espie 999: (void)fflush(stdout);
1.2 deraadt 1000: }
1001: #ifdef notdef
1002: /*
1003: * We don't really want to restart a job from scratch just
1004: * because it continued, especially not without killing the
1.40 espie 1005: * continuing process! That's why this is ifdef'ed out.
1.2 deraadt 1006: * FD - 9/17/90
1007: */
1.1 deraadt 1008: JobRestart(job);
1.2 deraadt 1009: #endif
1010: }
1011: job->flags &= ~JOB_CONTINUING;
1.40 espie 1012: Lst_AtEnd(&jobs, job);
1.2 deraadt 1013: nJobs += 1;
1.48 espie 1014: if (DEBUG(JOB)) {
1015: (void)fprintf(stdout,
1.51 mpech 1016: "Process %ld is continuing locally.\n",
1017: (long)job->pid);
1.48 espie 1018: (void)fflush(stdout);
1.1 deraadt 1019: }
1.48 espie 1020: nLocal += 1;
1.2 deraadt 1021: if (nJobs == maxJobs) {
1.41 espie 1022: jobFull = true;
1.2 deraadt 1023: if (DEBUG(JOB)) {
1.40 espie 1024: (void)fprintf(stdout, "Job queue is full.\n");
1025: (void)fflush(stdout);
1026: }
1027: }
1028: (void)fflush(out);
1029: return;
1.1 deraadt 1030: } else {
1031: if (usePipes && job->node != lastNode) {
1.2 deraadt 1032: MESSAGE(out, job->node);
1.1 deraadt 1033: lastNode = job->node;
1034: }
1.40 espie 1035: (void)fprintf(out, "*** Signal %d\n", WTERMSIG(*status));
1.1 deraadt 1036: }
1037:
1.40 espie 1038: (void)fflush(out);
1.1 deraadt 1039: }
1040:
1041: /*
1042: * Now handle the -B-mode stuff. If the beast still isn't finished,
1043: * try and restart the job on the next command. If JobStart says it's
1044: * ok, it's ok. If there's an error, this puppy is done.
1045: */
1.40 espie 1046: if (compatMake && WIFEXITED(*status) && job->node->current != NULL) {
1.2 deraadt 1047: switch (JobStart(job->node, job->flags & JOB_IGNDOTS, job)) {
1048: case JOB_RUNNING:
1.41 espie 1049: done = false;
1.2 deraadt 1050: break;
1051: case JOB_ERROR:
1.41 espie 1052: done = true;
1.2 deraadt 1053: W_SETEXITSTATUS(status, 1);
1054: break;
1055: case JOB_FINISHED:
1056: /*
1057: * If we got back a JOB_FINISHED code, JobStart has already
1058: * called Make_Update and freed the job descriptor. We set
1059: * done to false here to avoid fake cycles and double frees.
1060: * JobStart needs to do the update so we can proceed up the
1061: * graph when given the -n flag..
1062: */
1.41 espie 1063: done = false;
1.2 deraadt 1064: break;
1.1 deraadt 1065: }
1.40 espie 1066: } else
1.41 espie 1067: done = true;
1.1 deraadt 1068:
1069: if (done &&
1.40 espie 1070: aborting != ABORT_ERROR &&
1071: aborting != ABORT_INTERRUPT &&
1072: *status == 0) {
1073: /* As long as we aren't aborting and the job didn't return a non-zero
1.1 deraadt 1074: * status that we shouldn't ignore, we call Make_Update to update
1075: * the parents. In addition, any saved commands for the node are placed
1.40 espie 1076: * on the .END target. */
1.27 espie 1077: Lst_ForEachFrom(job->tailCmds, JobSaveCommand, job->node);
1.1 deraadt 1078: job->node->made = MADE;
1.2 deraadt 1079: Make_Update(job->node);
1.28 espie 1080: free(job);
1.5 briggs 1081: } else if (*status != 0) {
1.1 deraadt 1082: errors += 1;
1.28 espie 1083: free(job);
1.1 deraadt 1084: }
1085:
1.2 deraadt 1086: JobRestartJobs();
1.1 deraadt 1087:
1088: /*
1089: * Set aborting if any error.
1090: */
1.40 espie 1091: if (errors && !keepgoing && aborting != ABORT_INTERRUPT) {
1.1 deraadt 1092: /*
1093: * If we found any errors in this batch of children and the -k flag
1094: * wasn't given, we set the aborting flag so no more jobs get
1095: * started.
1096: */
1097: aborting = ABORT_ERROR;
1098: }
1.6 millert 1099:
1.40 espie 1100: if (aborting == ABORT_ERROR && Job_Empty()) {
1.1 deraadt 1101: /*
1102: * If we are aborting and the job table is now empty, we finish.
1103: */
1.40 espie 1104: (void)eunlink(tfile);
1.2 deraadt 1105: Finish(errors);
1.40 espie 1106: }
1.1 deraadt 1107: }
1108:
1109: /*-
1110: *-----------------------------------------------------------------------
1111: * JobExec --
1112: * Execute the shell for the given job. Called from JobStart and
1113: * JobRestart.
1114: *
1115: * Side Effects:
1116: * A shell is executed, outputs is altered and the Job structure added
1117: * to the job table.
1118: *-----------------------------------------------------------------------
1119: */
1120: static void
1.56 espie 1121: JobExec(Job *job, char **argv)
1.1 deraadt 1122: {
1.51 mpech 1123: pid_t cpid; /* ID of new child */
1.6 millert 1124:
1.1 deraadt 1125: if (DEBUG(JOB)) {
1.40 espie 1126: int i;
1.6 millert 1127:
1.48 espie 1128: (void)fprintf(stdout, "Running %s\n", job->node->name);
1.40 espie 1129: (void)fprintf(stdout, "\tCommand: ");
1.2 deraadt 1130: for (i = 0; argv[i] != NULL; i++) {
1.40 espie 1131: (void)fprintf(stdout, "%s ", argv[i]);
1.1 deraadt 1132: }
1.40 espie 1133: (void)fprintf(stdout, "\n");
1134: (void)fflush(stdout);
1.1 deraadt 1135: }
1.6 millert 1136:
1.1 deraadt 1137: /*
1138: * Some jobs produce no output and it's disconcerting to have
1.6 millert 1139: * no feedback of their running (since they produce no output, the
1.1 deraadt 1140: * banner with their name in it never appears). This is an attempt to
1141: * provide that feedback, even if nothing follows it.
1142: */
1.40 espie 1143: if (lastNode != job->node && (job->flags & JOB_FIRST) &&
1.2 deraadt 1144: !(job->flags & JOB_SILENT)) {
1145: MESSAGE(stdout, job->node);
1.1 deraadt 1146: lastNode = job->node;
1147: }
1.6 millert 1148:
1.52 mickey 1149: if ((cpid = fork()) == -1) {
1.2 deraadt 1150: Punt("Cannot fork");
1.1 deraadt 1151: } else if (cpid == 0) {
1152:
1153: /*
1154: * Must duplicate the input stream down to the child's input and
1.6 millert 1155: * reset it to the beginning (again). Since the stream was marked
1.1 deraadt 1156: * close-on-exec, we must clear that bit in the new input.
1157: */
1.2 deraadt 1158: if (dup2(FILENO(job->cmdFILE), 0) == -1)
1159: Punt("Cannot dup2: %s", strerror(errno));
1.40 espie 1160: (void)fcntl(0, F_SETFD, 0);
1161: (void)lseek(0, 0, SEEK_SET);
1.6 millert 1162:
1.1 deraadt 1163: if (usePipes) {
1164: /*
1165: * Set up the child's output to be routed through the pipe
1166: * we've created for it.
1167: */
1.2 deraadt 1168: if (dup2(job->outPipe, 1) == -1)
1169: Punt("Cannot dup2: %s", strerror(errno));
1.1 deraadt 1170: } else {
1171: /*
1172: * We're capturing output in a file, so we duplicate the
1173: * descriptor to the temporary file into the standard
1174: * output.
1175: */
1.2 deraadt 1176: if (dup2(job->outFd, 1) == -1)
1177: Punt("Cannot dup2: %s", strerror(errno));
1.1 deraadt 1178: }
1179: /*
1180: * The output channels are marked close on exec. This bit was
1.6 millert 1181: * duplicated by the dup2 (on some systems), so we have to clear
1.1 deraadt 1182: * it before routing the shell's error output to the same place as
1183: * its standard output.
1184: */
1.40 espie 1185: (void)fcntl(1, F_SETFD, 0);
1.2 deraadt 1186: if (dup2(1, 2) == -1)
1187: Punt("Cannot dup2: %s", strerror(errno));
1.1 deraadt 1188:
1189: #ifdef USE_PGRP
1190: /*
1191: * We want to switch the child into a different process family so
1192: * we can kill it and all its descendants in one fell swoop,
1193: * by killing its process family, but not commit suicide.
1194: */
1.2 deraadt 1195: # if defined(SYSV)
1.40 espie 1196: (void)setsid();
1.2 deraadt 1197: # else
1.40 espie 1198: (void)setpgid(0, getpid());
1.2 deraadt 1199: # endif
1200: #endif /* USE_PGRP */
1.1 deraadt 1201:
1.40 espie 1202: (void)execv(shellPath, argv);
1.2 deraadt 1203:
1.59 deraadt 1204: (void)write(STDERR_FILENO, "Could not execute shell\n",
1.2 deraadt 1205: sizeof("Could not execute shell"));
1206: _exit(1);
1.1 deraadt 1207: } else {
1208: job->pid = cpid;
1209:
1210: if (usePipes && (job->flags & JOB_FIRST) ) {
1211: /*
1212: * The first time a job is run for a node, we set the current
1213: * position in the buffer to the beginning and mark another
1214: * stream to watch in the outputs mask
1215: */
1216: job->curPos = 0;
1.6 millert 1217:
1.8 deraadt 1218: if (outputsp == NULL || job->inPipe > outputsn) {
1.62 cnst 1219: int bytes, obytes;
1220: char *tmp;
1.8 deraadt 1221:
1.62 cnst 1222: bytes = howmany(job->inPipe+1, NFDBITS) * sizeof(fd_mask);
1223: obytes = outputsn ?
1224: howmany(outputsn+1, NFDBITS) * sizeof(fd_mask) : 0;
1225:
1226: if (bytes != obytes) {
1227: tmp = realloc(outputsp, bytes);
1228: if (tmp == NULL)
1.8 deraadt 1229: return;
1.62 cnst 1230: memset(tmp + obytes, 0, bytes - obytes);
1231: outputsp = (fd_set *)tmp;
1.8 deraadt 1232: }
1233: outputsn = job->inPipe;
1234: }
1235: FD_SET(job->inPipe, outputsp);
1.1 deraadt 1236: }
1237:
1.48 espie 1238: nLocal += 1;
1239: /*
1240: * XXX: Used to not happen if REMOTE. Why?
1241: */
1242: if (job->cmdFILE != NULL && job->cmdFILE != stdout) {
1243: (void)fclose(job->cmdFILE);
1244: job->cmdFILE = NULL;
1.1 deraadt 1245: }
1246: }
1247:
1248: /*
1249: * Now the job is actually running, add it to the table.
1250: */
1251: nJobs += 1;
1.29 espie 1252: Lst_AtEnd(&jobs, job);
1.1 deraadt 1253: if (nJobs == maxJobs) {
1.41 espie 1254: jobFull = true;
1.1 deraadt 1255: }
1256: }
1257:
1258: /*-
1259: *-----------------------------------------------------------------------
1260: * JobMakeArgv --
1261: * Create the argv needed to execute the shell for a given job.
1262: *-----------------------------------------------------------------------
1263: */
1264: static void
1.56 espie 1265: JobMakeArgv(Job *job, char **argv)
1.1 deraadt 1266: {
1.40 espie 1267: int argc;
1268: static char args[10]; /* For merged arguments */
1.6 millert 1269:
1.1 deraadt 1270: argv[0] = shellName;
1271: argc = 1;
1272:
1.40 espie 1273: if ((commandShell->exit && *commandShell->exit != '-') ||
1274: (commandShell->echo && *commandShell->echo != '-'))
1.1 deraadt 1275: {
1276: /*
1277: * At least one of the flags doesn't have a minus before it, so
1278: * merge them together. Have to do this because the *(&(@*#*&#$#
1279: * Bourne shell thinks its second argument is a file to source.
1280: * Grrrr. Note the ten-character limitation on the combined arguments.
1281: */
1.54 espie 1282: (void)snprintf(args, sizeof(args), "-%s%s",
1.1 deraadt 1283: ((job->flags & JOB_IGNERR) ? "" :
1284: (commandShell->exit ? commandShell->exit : "")),
1285: ((job->flags & JOB_SILENT) ? "" :
1286: (commandShell->echo ? commandShell->echo : "")));
1287:
1288: if (args[1]) {
1289: argv[argc] = args;
1290: argc++;
1291: }
1292: } else {
1293: if (!(job->flags & JOB_IGNERR) && commandShell->exit) {
1294: argv[argc] = commandShell->exit;
1295: argc++;
1296: }
1297: if (!(job->flags & JOB_SILENT) && commandShell->echo) {
1298: argv[argc] = commandShell->echo;
1299: argc++;
1300: }
1301: }
1.2 deraadt 1302: argv[argc] = NULL;
1.1 deraadt 1303: }
1304:
1305: /*-
1306: *-----------------------------------------------------------------------
1307: * JobRestart --
1.6 millert 1308: * Restart a job that stopped for some reason.
1.1 deraadt 1309: *
1310: * Side Effects:
1311: * jobFull will be set if the job couldn't be run.
1312: *-----------------------------------------------------------------------
1313: */
1314: static void
1.56 espie 1315: JobRestart(Job *job)
1.1 deraadt 1316: {
1.49 espie 1317: if (job->flags & JOB_RESTART) {
1.1 deraadt 1318: /*
1319: * Set up the control arguments to the shell. This is based on the
1320: * flags set earlier for this job. If the JOB_IGNERR flag is clear,
1321: * the 'exit' flag of the commandShell is used to cause it to exit
1322: * upon receiving an error. If the JOB_SILENT flag is clear, the
1323: * 'echo' flag of the commandShell is used to get it to start echoing
1.6 millert 1324: * as soon as it starts processing commands.
1.1 deraadt 1325: */
1326: char *argv[4];
1.6 millert 1327:
1.1 deraadt 1328: JobMakeArgv(job, argv);
1.2 deraadt 1329:
1.1 deraadt 1330: if (DEBUG(JOB)) {
1.40 espie 1331: (void)fprintf(stdout, "Restarting %s...", job->node->name);
1332: (void)fflush(stdout);
1.1 deraadt 1333: }
1.2 deraadt 1334: {
1.40 espie 1335: if (nLocal >= maxLocal && !(job->flags & JOB_SPECIAL)) {
1.1 deraadt 1336: /*
1337: * Can't be exported and not allowed to run locally -- put it
1338: * back on the hold queue and mark the table full
1339: */
1340: if (DEBUG(JOB)) {
1.40 espie 1341: (void)fprintf(stdout, "holding\n");
1342: (void)fflush(stdout);
1.1 deraadt 1343: }
1.29 espie 1344: Lst_AtFront(&stoppedJobs, job);
1.41 espie 1345: jobFull = true;
1.1 deraadt 1346: if (DEBUG(JOB)) {
1.40 espie 1347: (void)fprintf(stdout, "Job queue is full.\n");
1348: (void)fflush(stdout);
1.1 deraadt 1349: }
1350: return;
1.2 deraadt 1351: } else {
1.1 deraadt 1352: /*
1353: * Job may be run locally.
1354: */
1355: if (DEBUG(JOB)) {
1.40 espie 1356: (void)fprintf(stdout, "running locally\n");
1357: (void)fflush(stdout);
1.1 deraadt 1358: }
1.2 deraadt 1359: }
1.1 deraadt 1360: }
1361: JobExec(job, argv);
1362: } else {
1363: /*
1364: * The job has stopped and needs to be restarted. Why it stopped,
1365: * we don't know...
1366: */
1367: if (DEBUG(JOB)) {
1.40 espie 1368: (void)fprintf(stdout, "Resuming %s...", job->node->name);
1369: (void)fflush(stdout);
1.1 deraadt 1370: }
1.48 espie 1371: if ((nLocal < maxLocal ||
1.40 espie 1372: ((job->flags & JOB_SPECIAL) &&
1373: maxLocal == 0)
1374: ) && nJobs != maxJobs)
1.1 deraadt 1375: {
1376: /*
1.50 espie 1377: * If we haven't reached the concurrency limit already (or
1378: * maxLocal is 0), it's ok to resume the job.
1.1 deraadt 1379: */
1.41 espie 1380: bool error;
1.2 deraadt 1381: int status;
1.6 millert 1382:
1.40 espie 1383: error = KILL(job->pid, SIGCONT) != 0;
1.1 deraadt 1384:
1385: if (!error) {
1386: /*
1387: * Make sure the user knows we've continued the beast and
1388: * actually put the thing in the job table.
1389: */
1390: job->flags |= JOB_CONTINUING;
1.2 deraadt 1391: W_SETTERMSIG(&status, SIGCONT);
1392: JobFinish(job, &status);
1.6 millert 1393:
1.1 deraadt 1394: job->flags &= ~(JOB_RESUME|JOB_CONTINUING);
1395: if (DEBUG(JOB)) {
1.40 espie 1396: (void)fprintf(stdout, "done\n");
1397: (void)fflush(stdout);
1.1 deraadt 1398: }
1399: } else {
1400: Error("couldn't resume %s: %s",
1401: job->node->name, strerror(errno));
1.2 deraadt 1402: status = 0;
1403: W_SETEXITSTATUS(&status, 1);
1404: JobFinish(job, &status);
1.1 deraadt 1405: }
1406: } else {
1407: /*
1408: * Job cannot be restarted. Mark the table as full and
1409: * place the job back on the list of stopped jobs.
1410: */
1411: if (DEBUG(JOB)) {
1.40 espie 1412: (void)fprintf(stdout, "table full\n");
1413: (void)fflush(stdout);
1.1 deraadt 1414: }
1.29 espie 1415: Lst_AtFront(&stoppedJobs, job);
1.41 espie 1416: jobFull = true;
1.1 deraadt 1417: if (DEBUG(JOB)) {
1.40 espie 1418: (void)fprintf(stdout, "Job queue is full.\n");
1419: (void)fflush(stdout);
1.1 deraadt 1420: }
1421: }
1422: }
1423: }
1424:
1425: /*-
1426: *-----------------------------------------------------------------------
1427: * JobStart --
1428: * Start a target-creation process going for the target described
1.6 millert 1429: * by the graph node gn.
1.1 deraadt 1430: *
1431: * Results:
1432: * JOB_ERROR if there was an error in the commands, JOB_FINISHED
1433: * if there isn't actually anything left to do for the job and
1434: * JOB_RUNNING if the job has been started.
1435: *
1436: * Side Effects:
1437: * A new Job node is created and added to the list of running
1438: * jobs. PMake is forked and a child shell created.
1439: *-----------------------------------------------------------------------
1440: */
1441: static int
1.56 espie 1442: JobStart(GNode *gn, /* target to create */
1443: int flags, /* flags for the job to override normal ones.
1.1 deraadt 1444: * e.g. JOB_SPECIAL or JOB_IGNDOTS */
1.56 espie 1445: Job *previous) /* The previous Job structure for this node,
1.1 deraadt 1446: * if any. */
1447: {
1.40 espie 1448: Job *job; /* new job descriptor */
1.1 deraadt 1449: char *argv[4]; /* Argument vector to shell */
1.41 espie 1450: bool cmdsOK; /* true if the nodes commands were all right */
1451: bool local; /* Set true if the job was run locally */
1452: bool noExec; /* Set true if we decide not to run the job */
1.1 deraadt 1453:
1.2 deraadt 1454: if (previous != NULL) {
1.48 espie 1455: previous->flags &= ~(JOB_FIRST|JOB_IGNERR|JOB_SILENT);
1.1 deraadt 1456: job = previous;
1457: } else {
1.40 espie 1458: job = emalloc(sizeof(Job));
1.2 deraadt 1459: if (job == NULL) {
1.1 deraadt 1460: Punt("JobStart out of memory");
1461: }
1462: flags |= JOB_FIRST;
1463: }
1464:
1465: job->node = gn;
1.18 espie 1466: job->tailCmds = NULL;
1.1 deraadt 1467:
1468: /*
1469: * Set the initial value of the flags for this job based on the global
1470: * ones and the node's attributes... Any flags supplied by the caller
1471: * are also added to the field.
1472: */
1473: job->flags = 0;
1.2 deraadt 1474: if (Targ_Ignore(gn)) {
1.1 deraadt 1475: job->flags |= JOB_IGNERR;
1476: }
1.2 deraadt 1477: if (Targ_Silent(gn)) {
1.1 deraadt 1478: job->flags |= JOB_SILENT;
1479: }
1480: job->flags |= flags;
1481:
1482: /*
1483: * Check the commands now so any attributes from .DEFAULT have a chance
1484: * to migrate to the node
1485: */
1.2 deraadt 1486: if (!compatMake && job->flags & JOB_FIRST) {
1.1 deraadt 1487: cmdsOK = Job_CheckCommands(gn, Error);
1488: } else {
1.41 espie 1489: cmdsOK = true;
1.1 deraadt 1490: }
1.6 millert 1491:
1.1 deraadt 1492: /*
1.6 millert 1493: * If the -n flag wasn't given, we open up OUR (not the child's)
1.1 deraadt 1494: * temporary file to stuff commands in it. The thing is rd/wr so we don't
1495: * need to reopen it to feed it to the shell. If the -n flag *was* given,
1496: * we just set the file to be stdout. Cute, huh?
1497: */
1498: if ((gn->type & OP_MAKE) || (!noExecute && !touchFlag)) {
1499: /*
1500: * We're serious here, but if the commands were bogus, we're
1501: * also dead...
1502: */
1503: if (!cmdsOK) {
1504: DieHorribly();
1505: }
1.6 millert 1506:
1.40 espie 1507: job->cmdFILE = fopen(tfile, "w+");
1.2 deraadt 1508: if (job->cmdFILE == NULL) {
1509: Punt("Could not open %s", tfile);
1.1 deraadt 1510: }
1.40 espie 1511: (void)fcntl(FILENO(job->cmdFILE), F_SETFD, 1);
1.1 deraadt 1512: /*
1513: * Send the commands to the command file, flush all its buffers then
1514: * rewind and remove the thing.
1515: */
1.41 espie 1516: noExec = false;
1.1 deraadt 1517:
1518: /*
1519: * used to be backwards; replace when start doing multiple commands
1520: * per shell.
1521: */
1522: if (compatMake) {
1523: /*
1524: * Be compatible: If this is the first time for this node,
1525: * verify its commands are ok and open the commands list for
1526: * sequential access by later invocations of JobStart.
1527: * Once that is done, we take the next command off the list
1528: * and print it to the command file. If the command was an
1529: * ellipsis, note that there's nothing more to execute.
1530: */
1.30 espie 1531: if ((job->flags&JOB_FIRST))
1.40 espie 1532: gn->current = Lst_First(&gn->commands);
1533: else
1534: gn->current = Lst_Succ(gn->current);
1.6 millert 1535:
1.40 espie 1536: if (gn->current == NULL ||
1.60 espie 1537: !JobPrintCommand(gn->current, job)) {
1.41 espie 1538: noExec = true;
1.40 espie 1539: gn->current = NULL;
1.30 espie 1540: }
1541: if (noExec && !(job->flags & JOB_FIRST)) {
1542: /*
1543: * If we're not going to execute anything, the job
1544: * is done and we need to close down the various
1545: * file descriptors we've opened for output, then
1546: * call JobDoOutput to catch the final characters or
1547: * send the file to the screen... Note that the i/o streams
1548: * are only open if this isn't the first job.
1549: * Note also that this could not be done in
1550: * Job_CatchChildren b/c it wasn't clear if there were
1551: * more commands to execute or not...
1552: */
1553: JobClose(job);
1.1 deraadt 1554: }
1555: } else {
1556: /*
1557: * We can do all the commands at once. hooray for sanity
1558: */
1559: numCommands = 0;
1.60 espie 1560: Lst_ForEachNodeWhile(&gn->commands, JobPrintCommand, job);
1.6 millert 1561:
1.1 deraadt 1562: /*
1563: * If we didn't print out any commands to the shell script,
1564: * there's not much point in executing the shell, is there?
1565: */
1566: if (numCommands == 0) {
1.41 espie 1567: noExec = true;
1.1 deraadt 1568: }
1569: }
1570: } else if (noExecute) {
1571: /*
1572: * Not executing anything -- just print all the commands to stdout
1573: * in one fell swoop. This will still set up job->tailCmds correctly.
1574: */
1575: if (lastNode != gn) {
1.2 deraadt 1576: MESSAGE(stdout, gn);
1.1 deraadt 1577: lastNode = gn;
1578: }
1579: job->cmdFILE = stdout;
1580: /*
1581: * Only print the commands if they're ok, but don't die if they're
1582: * not -- just let the user know they're bad and keep going. It
1583: * doesn't do any harm in this case and may do some good.
1584: */
1.40 espie 1585: if (cmdsOK) {
1.60 espie 1586: Lst_ForEachNodeWhile(&gn->commands, JobPrintCommand, job);
1.40 espie 1587: }
1.1 deraadt 1588: /*
1589: * Don't execute the shell, thank you.
1590: */
1.41 espie 1591: noExec = true;
1.1 deraadt 1592: } else {
1593: /*
1594: * Just touch the target and note that no shell should be executed.
1595: * Set cmdFILE to stdout to make life easier. Check the commands, too,
1596: * but don't die if they're no good -- it does no harm to keep working
1597: * up the graph.
1598: */
1599: job->cmdFILE = stdout;
1.40 espie 1600: Job_Touch(gn, job->flags&JOB_SILENT);
1.41 espie 1601: noExec = true;
1.1 deraadt 1602: }
1603:
1604: /*
1.6 millert 1605: * If we're not supposed to execute a shell, don't.
1.1 deraadt 1606: */
1607: if (noExec) {
1608: /*
1609: * Unlink and close the command file if we opened one
1610: */
1611: if (job->cmdFILE != stdout) {
1.40 espie 1612: (void)eunlink(tfile);
1.2 deraadt 1613: if (job->cmdFILE != NULL)
1.40 espie 1614: (void)fclose(job->cmdFILE);
1.1 deraadt 1615: } else {
1.40 espie 1616: (void)fflush(stdout);
1.1 deraadt 1617: }
1618:
1619: /*
1620: * We only want to work our way up the graph if we aren't here because
1621: * the commands for the job were no good.
1622: */
1623: if (cmdsOK) {
1624: if (aborting == 0) {
1.40 espie 1625: Lst_ForEachFrom(job->tailCmds, JobSaveCommand, job->node);
1.1 deraadt 1626: Make_Update(job->node);
1627: }
1.28 espie 1628: free(job);
1629: return JOB_FINISHED;
1.1 deraadt 1630: } else {
1.28 espie 1631: free(job);
1632: return JOB_ERROR;
1.1 deraadt 1633: }
1634: } else {
1.40 espie 1635: (void)fflush(job->cmdFILE);
1636: (void)eunlink(tfile);
1.1 deraadt 1637: }
1638:
1639: /*
1640: * Set up the control arguments to the shell. This is based on the flags
1641: * set earlier for this job.
1642: */
1643: JobMakeArgv(job, argv);
1644:
1645: /*
1646: * If we're using pipes to catch output, create the pipe by which we'll
1647: * get the shell's output. If we're using files, print out that we're
1.7 millert 1648: * starting a job and then set up its temporary-file name.
1.1 deraadt 1649: */
1.2 deraadt 1650: if (!compatMake || (job->flags & JOB_FIRST)) {
1.1 deraadt 1651: if (usePipes) {
1652: int fd[2];
1.2 deraadt 1653: if (pipe(fd) == -1)
1654: Punt("Cannot create pipe: %s", strerror(errno));
1.1 deraadt 1655: job->inPipe = fd[0];
1656: job->outPipe = fd[1];
1.40 espie 1657: (void)fcntl(job->inPipe, F_SETFD, 1);
1658: (void)fcntl(job->outPipe, F_SETFD, 1);
1.1 deraadt 1659: } else {
1.40 espie 1660: (void)fprintf(stdout, "Remaking `%s'\n", gn->name);
1661: (void)fflush(stdout);
1.54 espie 1662: (void)strlcpy(job->outFile, TMPPAT, sizeof(job->outFile));
1.7 millert 1663: if ((job->outFd = mkstemp(job->outFile)) == -1)
1664: Punt("Cannot create temp file: %s", strerror(errno));
1.40 espie 1665: (void)fcntl(job->outFd, F_SETFD, 1);
1.1 deraadt 1666: }
1667: }
1668:
1.41 espie 1669: local = true;
1.1 deraadt 1670:
1.40 espie 1671: if (local && nLocal >= maxLocal &&
1.2 deraadt 1672: !(job->flags & JOB_SPECIAL) &&
1.40 espie 1673: maxLocal != 0
1674: )
1.1 deraadt 1675: {
1676: /*
1677: * The job can only be run locally, but we've hit the limit of
1678: * local concurrency, so put the job on hold until some other job
1.6 millert 1679: * finishes. Note that the special jobs (.BEGIN, .INTERRUPT and .END)
1.1 deraadt 1680: * may be run locally even when the local limit has been reached
1.6 millert 1681: * (e.g. when maxLocal == 0), though they will be exported if at
1.2 deraadt 1682: * all possible. In addition, any target marked with .NOEXPORT will
1683: * be run locally if maxLocal is 0.
1.1 deraadt 1684: */
1.41 espie 1685: jobFull = true;
1.6 millert 1686:
1.1 deraadt 1687: if (DEBUG(JOB)) {
1.40 espie 1688: (void)fprintf(stdout, "Can only run job locally.\n");
1689: (void)fflush(stdout);
1.1 deraadt 1690: }
1691: job->flags |= JOB_RESTART;
1.29 espie 1692: Lst_AtEnd(&stoppedJobs, job);
1.1 deraadt 1693: } else {
1.40 espie 1694: if (nLocal >= maxLocal && local) {
1.1 deraadt 1695: /*
1.6 millert 1696: * If we're running this job locally as a special case (see above),
1.1 deraadt 1697: * at least say the table is full.
1698: */
1.41 espie 1699: jobFull = true;
1.1 deraadt 1700: if (DEBUG(JOB)) {
1.40 espie 1701: (void)fprintf(stdout, "Local job queue is full.\n");
1702: (void)fflush(stdout);
1.1 deraadt 1703: }
1704: }
1705: JobExec(job, argv);
1706: }
1.40 espie 1707: return JOB_RUNNING;
1.1 deraadt 1708: }
1709:
1.6 millert 1710: static char *
1.56 espie 1711: JobOutput(Job *job, char *cp, char *endp, int msg)
1.2 deraadt 1712: {
1.40 espie 1713: char *ecp;
1.2 deraadt 1714:
1715: if (commandShell->noPrint) {
1.14 espie 1716: ecp = strstr(cp, commandShell->noPrint);
1.2 deraadt 1717: while (ecp != NULL) {
1718: if (cp != ecp) {
1719: *ecp = '\0';
1720: if (msg && job->node != lastNode) {
1721: MESSAGE(stdout, job->node);
1722: lastNode = job->node;
1723: }
1724: /*
1725: * The only way there wouldn't be a newline after
1726: * this line is if it were the last in the buffer.
1727: * however, since the non-printable comes after it,
1728: * there must be a newline, so we don't print one.
1729: */
1.40 espie 1730: (void)fprintf(stdout, "%s", cp);
1731: (void)fflush(stdout);
1.2 deraadt 1732: }
1733: cp = ecp + commandShell->noPLen;
1734: if (cp != endp) {
1735: /*
1736: * Still more to print, look again after skipping
1737: * the whitespace following the non-printable
1738: * command....
1739: */
1740: cp++;
1741: while (*cp == ' ' || *cp == '\t' || *cp == '\n') {
1742: cp++;
1743: }
1.14 espie 1744: ecp = strstr(cp, commandShell->noPrint);
1.2 deraadt 1745: } else {
1746: return cp;
1747: }
1748: }
1749: }
1750: return cp;
1751: }
1752:
1.1 deraadt 1753: /*-
1754: *-----------------------------------------------------------------------
1.40 espie 1755: * JobDoOutput --
1.1 deraadt 1756: * This function is called at different times depending on
1757: * whether the user has specified that output is to be collected
1758: * via pipes or temporary files. In the former case, we are called
1759: * whenever there is something to read on the pipe. We collect more
1760: * output from the given job and store it in the job's outBuf. If
1761: * this makes up a line, we print it tagged by the job's identifier,
1762: * as necessary.
1763: * If output has been collected in a temporary file, we open the
1764: * file and read it line by line, transfering it to our own
1765: * output channel until the file is empty. At which point we
1766: * remove the temporary file.
1767: * In both cases, however, we keep our figurative eye out for the
1768: * 'noPrint' line for the shell from which the output came. If
1769: * we recognize a line, we don't print it. If the command is not
1.6 millert 1770: * alone on the line (the character after it is not \0 or \n), we
1.1 deraadt 1771: * do print whatever follows it.
1772: *
1773: * Side Effects:
1774: * curPos may be shifted as may the contents of outBuf.
1775: *-----------------------------------------------------------------------
1776: */
1.48 espie 1777: static void
1.56 espie 1778: JobDoOutput(Job *job, /* the job whose output needs printing */
1779: bool finish) /* true if this is the last time we'll be
1.1 deraadt 1780: * called for this job */
1781: {
1.41 espie 1782: bool gotNL = false; /* true if got a newline */
1783: bool fbuf; /* true if our buffer filled up */
1.40 espie 1784: int nr; /* number of bytes read */
1785: int i; /* auxiliary index into outBuf */
1786: int max; /* limit for i (end of current data) */
1787: int nRead; /* (Temporary) number of bytes read */
1.1 deraadt 1788:
1.40 espie 1789: FILE *oFILE; /* Stream pointer to shell's output file */
1790: char inLine[132];
1.1 deraadt 1791:
1.6 millert 1792:
1.1 deraadt 1793: if (usePipes) {
1794: /*
1795: * Read as many bytes as will fit in the buffer.
1796: */
1797: end_loop:
1.41 espie 1798: gotNL = false;
1799: fbuf = false;
1.6 millert 1800:
1.2 deraadt 1801: nRead = read(job->inPipe, &job->outBuf[job->curPos],
1.1 deraadt 1802: JOB_BUFSIZE - job->curPos);
1.40 espie 1803: if (nRead == -1) {
1.1 deraadt 1804: if (DEBUG(JOB)) {
1805: perror("JobDoOutput(piperead)");
1806: }
1807: nr = 0;
1808: } else {
1809: nr = nRead;
1810: }
1811:
1812: /*
1.6 millert 1813: * If we hit the end-of-file (the job is dead), we must flush its
1.1 deraadt 1814: * remaining output, so pretend we read a newline if there's any
1815: * output remaining in the buffer.
1816: * Also clear the 'finish' flag so we stop looping.
1817: */
1.40 espie 1818: if (nr == 0 && job->curPos != 0) {
1.1 deraadt 1819: job->outBuf[job->curPos] = '\n';
1820: nr = 1;
1.41 espie 1821: finish = false;
1.1 deraadt 1822: } else if (nr == 0) {
1.41 espie 1823: finish = false;
1.1 deraadt 1824: }
1.6 millert 1825:
1.1 deraadt 1826: /*
1827: * Look for the last newline in the bytes we just got. If there is
1828: * one, break out of the loop with 'i' as its index and gotNL set
1.41 espie 1829: * true.
1.1 deraadt 1830: */
1831: max = job->curPos + nr;
1832: for (i = job->curPos + nr - 1; i >= job->curPos; i--) {
1833: if (job->outBuf[i] == '\n') {
1.41 espie 1834: gotNL = true;
1.1 deraadt 1835: break;
1836: } else if (job->outBuf[i] == '\0') {
1837: /*
1838: * Why?
1839: */
1840: job->outBuf[i] = ' ';
1841: }
1842: }
1.6 millert 1843:
1.1 deraadt 1844: if (!gotNL) {
1845: job->curPos += nr;
1846: if (job->curPos == JOB_BUFSIZE) {
1847: /*
1848: * If we've run out of buffer space, we have no choice
1.6 millert 1849: * but to print the stuff. sigh.
1.1 deraadt 1850: */
1.41 espie 1851: fbuf = true;
1.1 deraadt 1852: i = job->curPos;
1853: }
1854: }
1.2 deraadt 1855: if (gotNL || fbuf) {
1.1 deraadt 1856: /*
1857: * Need to send the output to the screen. Null terminate it
1858: * first, overwriting the newline character if there was one.
1.6 millert 1859: * So long as the line isn't one we should filter (according
1.58 jsg 1860: * to the shell description), we print the line, preceded
1.1 deraadt 1861: * by a target banner if this target isn't the same as the
1862: * one for which we last printed something.
1863: * The rest of the data in the buffer are then shifted down
1.6 millert 1864: * to the start of the buffer and curPos is set accordingly.
1.1 deraadt 1865: */
1866: job->outBuf[i] = '\0';
1867: if (i >= job->curPos) {
1.2 deraadt 1868: char *cp;
1.6 millert 1869:
1.41 espie 1870: cp = JobOutput(job, job->outBuf, &job->outBuf[i], false);
1.1 deraadt 1871:
1872: /*
1873: * There's still more in that thar buffer. This time, though,
1874: * we know there's no newline at the end, so we add one of
1875: * our own free will.
1876: */
1877: if (*cp != '\0') {
1878: if (job->node != lastNode) {
1.2 deraadt 1879: MESSAGE(stdout, job->node);
1.1 deraadt 1880: lastNode = job->node;
1881: }
1.40 espie 1882: (void)fprintf(stdout, "%s%s", cp, gotNL ? "\n" : "");
1883: (void)fflush(stdout);
1.1 deraadt 1884: }
1885: }
1886: if (i < max - 1) {
1887: /* shift the remaining characters down */
1.40 espie 1888: (void)memcpy(job->outBuf, &job->outBuf[i + 1], max - (i + 1));
1.6 millert 1889: job->curPos = max - (i + 1);
1890:
1.1 deraadt 1891: } else {
1892: /*
1893: * We have written everything out, so we just start over
1894: * from the start of the buffer. No copying. No nothing.
1895: */
1896: job->curPos = 0;
1897: }
1898: }
1899: if (finish) {
1900: /*
1901: * If the finish flag is true, we must loop until we hit
1.6 millert 1902: * end-of-file on the pipe. This is guaranteed to happen
1903: * eventually since the other end of the pipe is now closed
1904: * (we closed it explicitly and the child has exited). When
1.41 espie 1905: * we do get an EOF, finish will be set false and we'll fall
1.6 millert 1906: * through and out.
1.1 deraadt 1907: */
1908: goto end_loop;
1909: }
1910: } else {
1911: /*
1912: * We've been called to retrieve the output of the job from the
1913: * temporary file where it's been squirreled away. This consists of
1914: * opening the file, reading the output line by line, being sure not
1915: * to print the noPrint line for the shell we used, then close and
1916: * remove the temporary file. Very simple.
1917: *
1918: * Change to read in blocks and do FindSubString type things as for
1919: * pipes? That would allow for "@echo -n..."
1920: */
1.2 deraadt 1921: oFILE = fopen(job->outFile, "r");
1922: if (oFILE != NULL) {
1.40 espie 1923: (void)fprintf(stdout, "Results of making %s:\n", job->node->name);
1924: (void)fflush(stdout);
1.2 deraadt 1925: while (fgets(inLine, sizeof(inLine), oFILE) != NULL) {
1.40 espie 1926: char *cp, *endp, *oendp;
1.1 deraadt 1927:
1928: cp = inLine;
1.2 deraadt 1929: oendp = endp = inLine + strlen(inLine);
1.61 ray 1930: if (endp != inLine && endp[-1] == '\n') {
1.1 deraadt 1931: *--endp = '\0';
1932: }
1.41 espie 1933: cp = JobOutput(job, inLine, endp, false);
1.1 deraadt 1934:
1935: /*
1936: * There's still more in that thar buffer. This time, though,
1937: * we know there's no newline at the end, so we add one of
1938: * our own free will.
1939: */
1.40 espie 1940: (void)fprintf(stdout, "%s", cp);
1941: (void)fflush(stdout);
1.2 deraadt 1942: if (endp != oendp) {
1.40 espie 1943: (void)fprintf(stdout, "\n");
1944: (void)fflush(stdout);
1.1 deraadt 1945: }
1946: }
1.40 espie 1947: (void)fclose(oFILE);
1948: (void)eunlink(job->outFile);
1.1 deraadt 1949: }
1950: }
1951: }
1952:
1953: /*-
1954: *-----------------------------------------------------------------------
1955: * Job_CatchChildren --
1956: * Handle the exit of a child. Called from Make_Make.
1957: *
1958: * Side Effects:
1959: * The job descriptor is removed from the list of children.
1960: *
1961: * Notes:
1962: * We do waits, blocking or not, according to the wisdom of our
1963: * caller, until there are no more children to report. For each
1964: * job, call JobFinish to finish things off. This will take care of
1965: * putting jobs on the stoppedJobs queue.
1966: *-----------------------------------------------------------------------
1967: */
1968: void
1.56 espie 1969: Job_CatchChildren(bool block) /* true if should block on the wait. */
1.1 deraadt 1970: {
1.51 mpech 1971: pid_t pid; /* pid of dead child */
1.40 espie 1972: Job *job; /* job descriptor for dead child */
1973: LstNode jnode; /* list element for finding job */
1974: int status; /* Exit/termination status */
1.1 deraadt 1975:
1976: /*
1977: * Don't even bother if we know there's no one around.
1978: */
1979: if (nLocal == 0) {
1980: return;
1981: }
1.6 millert 1982:
1.2 deraadt 1983: while ((pid = waitpid((pid_t) -1, &status,
1984: (block?0:WNOHANG)|WUNTRACED)) > 0)
1.1 deraadt 1985: {
1.57 espie 1986: HandleSigs();
1.2 deraadt 1987: if (DEBUG(JOB)) {
1.51 mpech 1988: (void)fprintf(stdout, "Process %ld exited or stopped.\n", (long)pid);
1.40 espie 1989: (void)fflush(stdout);
1.2 deraadt 1990: }
1.6 millert 1991:
1.1 deraadt 1992:
1.29 espie 1993: jnode = Lst_Find(&jobs, JobCmpPid, &pid);
1.1 deraadt 1994:
1.18 espie 1995: if (jnode == NULL) {
1.2 deraadt 1996: if (WIFSIGNALED(status) && (WTERMSIG(status) == SIGCONT)) {
1.29 espie 1997: jnode = Lst_Find(&stoppedJobs, JobCmpPid, &pid);
1.18 espie 1998: if (jnode == NULL) {
1.51 mpech 1999: Error("Resumed child (%ld) not in table", (long)pid);
1.1 deraadt 2000: continue;
2001: }
2002: job = (Job *)Lst_Datum(jnode);
1.29 espie 2003: Lst_Remove(&stoppedJobs, jnode);
1.1 deraadt 2004: } else {
1.51 mpech 2005: Error("Child (%ld) not in table?", (long)pid);
1.1 deraadt 2006: continue;
2007: }
2008: } else {
1.30 espie 2009: job = (Job *)Lst_Datum(jnode);
1.29 espie 2010: Lst_Remove(&jobs, jnode);
1.1 deraadt 2011: nJobs -= 1;
2012: if (jobFull && DEBUG(JOB)) {
1.40 espie 2013: (void)fprintf(stdout, "Job queue is no longer full.\n");
2014: (void)fflush(stdout);
1.1 deraadt 2015: }
1.41 espie 2016: jobFull = false;
1.1 deraadt 2017: nLocal -= 1;
2018: }
2019:
1.2 deraadt 2020: JobFinish(job, &status);
1.1 deraadt 2021: }
2022: }
2023:
2024: /*-
2025: *-----------------------------------------------------------------------
2026: * Job_CatchOutput --
2027: * Catch the output from our children, if we're using
2028: * pipes do so. Otherwise just block time until we get a
1.6 millert 2029: * signal (most likely a SIGCHLD) since there's no point in
1.1 deraadt 2030: * just spinning when there's nothing to do and the reaping
1.6 millert 2031: * of a child can wait for a while.
1.1 deraadt 2032: *
2033: * Side Effects:
2034: * Output is read from pipes if we're piping.
2035: * -----------------------------------------------------------------------
2036: */
2037: void
1.56 espie 2038: Job_CatchOutput(void)
1.1 deraadt 2039: {
1.40 espie 2040: int nfds;
1.1 deraadt 2041: struct timeval timeout;
1.40 espie 2042: LstNode ln;
2043: Job *job;
1.1 deraadt 2044:
1.40 espie 2045: (void)fflush(stdout);
1.1 deraadt 2046: if (usePipes) {
1.8 deraadt 2047: int count = howmany(outputsn+1, NFDBITS) * sizeof(fd_mask);
2048: fd_set *readfdsp = malloc(count);
2049: if (readfdsp == NULL)
2050: return;
2051:
2052: memcpy(readfdsp, outputsp, count);
1.1 deraadt 2053: timeout.tv_sec = SEL_SEC;
2054: timeout.tv_usec = SEL_USEC;
2055:
1.8 deraadt 2056: if ((nfds = select(outputsn+1, readfdsp, (fd_set *) 0,
2057: (fd_set *) 0, &timeout)) <= 0) {
1.57 espie 2058: HandleSigs();
1.8 deraadt 2059: free(readfdsp);
1.1 deraadt 2060: return;
1.8 deraadt 2061: } else {
1.57 espie 2062: HandleSigs();
1.40 espie 2063: for (ln = Lst_First(&jobs); nfds && ln != NULL; ln = Lst_Adv(ln)) {
1.30 espie 2064: job = (Job *)Lst_Datum(ln);
1.8 deraadt 2065: if (FD_ISSET(job->inPipe, readfdsp)) {
1.41 espie 2066: JobDoOutput(job, false);
1.1 deraadt 2067: nfds -= 1;
2068: }
2069: }
2070: }
1.8 deraadt 2071: free(readfdsp);
1.1 deraadt 2072: }
2073: }
2074:
2075: /*-
2076: *-----------------------------------------------------------------------
2077: * Job_Make --
2078: * Start the creation of a target. Basically a front-end for
2079: * JobStart used by the Make module.
2080: *
2081: * Side Effects:
2082: * Another job is started.
2083: *-----------------------------------------------------------------------
2084: */
2085: void
1.56 espie 2086: Job_Make(GNode *gn)
1.1 deraadt 2087: {
1.40 espie 2088: (void)JobStart(gn, 0, NULL);
1.1 deraadt 2089: }
2090:
2091: /*-
2092: *-----------------------------------------------------------------------
2093: * Job_Init --
2094: * Initialize the process module
2095: *
2096: * Side Effects:
2097: * lists and counters are initialized
2098: *-----------------------------------------------------------------------
2099: */
2100: void
1.56 espie 2101: Job_Init(int maxproc, /* the greatest number of jobs which may be
1.1 deraadt 2102: * running at one time */
1.56 espie 2103: int maxlocal) /* the greatest number of local jobs which may
1.1 deraadt 2104: * be running at once. */
2105: {
1.40 espie 2106: GNode *begin; /* node for commands to do at the very start */
2107: int tfd;
2108:
1.54 espie 2109: (void)strlcpy(tfile, TMPPAT, sizeof(tfile));
1.40 espie 2110: if ((tfd = mkstemp(tfile)) == -1)
2111: Punt("Cannot create temp file: %s", strerror(errno));
2112: else
2113: (void)close(tfd);
1.1 deraadt 2114:
1.46 espie 2115: Static_Lst_Init(&jobs);
2116: Static_Lst_Init(&stoppedJobs);
1.40 espie 2117: maxJobs = maxproc;
2118: maxLocal = maxlocal;
2119: nJobs = 0;
2120: nLocal = 0;
1.41 espie 2121: jobFull = false;
1.1 deraadt 2122:
1.40 espie 2123: aborting = 0;
2124: errors = 0;
1.1 deraadt 2125:
1.18 espie 2126: lastNode = NULL;
1.1 deraadt 2127:
1.48 espie 2128: if (maxJobs == 1) {
1.1 deraadt 2129: /*
2130: * If only one job can run at a time, there's no need for a banner,
2131: * no is there?
2132: */
2133: targFmt = "";
2134: } else {
2135: targFmt = TARG_FMT;
2136: }
1.6 millert 2137:
1.2 deraadt 2138: if (shellPath == NULL) {
1.1 deraadt 2139: /*
2140: * The user didn't specify a shell to use, so we are using the
2141: * default one... Both the absolute path and the last component
2142: * must be set. The last component is taken from the 'name' field
2143: * of the default shell description pointed-to by commandShell.
2144: * All default shells are located in _PATH_DEFSHELLDIR.
2145: */
2146: shellName = commandShell->name;
1.41 espie 2147: shellPath = Str_concat(_PATH_DEFSHELLDIR, shellName, '/');
1.1 deraadt 2148: }
2149:
1.2 deraadt 2150: if (commandShell->exit == NULL) {
1.1 deraadt 2151: commandShell->exit = "";
2152: }
1.2 deraadt 2153: if (commandShell->echo == NULL) {
1.1 deraadt 2154: commandShell->echo = "";
2155: }
2156:
2157: /*
2158: * Catch the four signals that POSIX specifies if they aren't ignored.
2159: * JobPassSig will take care of calling JobInterrupt if appropriate.
2160: */
1.2 deraadt 2161: if (signal(SIGINT, SIG_IGN) != SIG_IGN) {
1.57 espie 2162: (void)signal(SIGINT, SigHandler);
1.1 deraadt 2163: }
1.2 deraadt 2164: if (signal(SIGHUP, SIG_IGN) != SIG_IGN) {
1.57 espie 2165: (void)signal(SIGHUP, SigHandler);
1.1 deraadt 2166: }
1.2 deraadt 2167: if (signal(SIGQUIT, SIG_IGN) != SIG_IGN) {
1.57 espie 2168: (void)signal(SIGQUIT, SigHandler);
1.1 deraadt 2169: }
1.2 deraadt 2170: if (signal(SIGTERM, SIG_IGN) != SIG_IGN) {
1.57 espie 2171: (void)signal(SIGTERM, SigHandler);
1.1 deraadt 2172: }
2173: /*
2174: * There are additional signals that need to be caught and passed if
2175: * either the export system wants to be told directly of signals or if
1.6 millert 2176: * we're giving each job its own process group (since then it won't get
1.1 deraadt 2177: * signals from the terminal driver as we own the terminal)
2178: */
1.48 espie 2179: #if defined(USE_PGRP)
1.2 deraadt 2180: if (signal(SIGTSTP, SIG_IGN) != SIG_IGN) {
1.57 espie 2181: (void)signal(SIGTSTP, SigHandler);
1.1 deraadt 2182: }
1.2 deraadt 2183: if (signal(SIGTTOU, SIG_IGN) != SIG_IGN) {
1.57 espie 2184: (void)signal(SIGTTOU, SigHandler);
1.1 deraadt 2185: }
1.2 deraadt 2186: if (signal(SIGTTIN, SIG_IGN) != SIG_IGN) {
1.57 espie 2187: (void)signal(SIGTTIN, SigHandler);
1.1 deraadt 2188: }
1.2 deraadt 2189: if (signal(SIGWINCH, SIG_IGN) != SIG_IGN) {
1.57 espie 2190: (void)signal(SIGWINCH, SigHandler);
1.1 deraadt 2191: }
2192: #endif
1.6 millert 2193:
1.41 espie 2194: begin = Targ_FindNode(".BEGIN", TARG_NOCREATE);
1.1 deraadt 2195:
1.18 espie 2196: if (begin != NULL) {
1.2 deraadt 2197: JobStart(begin, JOB_SPECIAL, (Job *)0);
1.1 deraadt 2198: while (nJobs) {
2199: Job_CatchOutput();
1.2 deraadt 2200: Job_CatchChildren(!usePipes);
1.1 deraadt 2201: }
2202: }
1.41 espie 2203: postCommands = Targ_FindNode(".END", TARG_CREATE);
1.1 deraadt 2204: }
2205:
2206: /*-
2207: *-----------------------------------------------------------------------
2208: * Job_Full --
2209: * See if the job table is full. It is considered full if it is OR
2210: * if we are in the process of aborting OR if we have
2211: * reached/exceeded our local quota. This prevents any more jobs
2212: * from starting up.
2213: *
2214: * Results:
1.41 espie 2215: * true if the job table is full, false otherwise
1.1 deraadt 2216: *-----------------------------------------------------------------------
2217: */
1.41 espie 2218: bool
1.56 espie 2219: Job_Full(void)
1.1 deraadt 2220: {
1.40 espie 2221: return aborting || jobFull;
1.1 deraadt 2222: }
2223:
2224: /*-
2225: *-----------------------------------------------------------------------
2226: * Job_Empty --
1.40 espie 2227: * See if the job table is empty. Because the local concurrency may
1.1 deraadt 2228: * be set to 0, it is possible for the job table to become empty,
2229: * while the list of stoppedJobs remains non-empty. In such a case,
2230: * we want to restart as many jobs as we can.
2231: *
2232: * Results:
1.41 espie 2233: * true if it is. false if it ain't.
1.1 deraadt 2234: * -----------------------------------------------------------------------
2235: */
1.41 espie 2236: bool
1.56 espie 2237: Job_Empty(void)
1.1 deraadt 2238: {
2239: if (nJobs == 0) {
1.29 espie 2240: if (!Lst_IsEmpty(&stoppedJobs) && !aborting) {
1.1 deraadt 2241: /*
2242: * The job table is obviously not full if it has no jobs in
2243: * it...Try and restart the stopped jobs.
2244: */
1.41 espie 2245: jobFull = false;
1.2 deraadt 2246: JobRestartJobs();
1.41 espie 2247: return false;
1.1 deraadt 2248: } else {
1.41 espie 2249: return true;
1.1 deraadt 2250: }
2251: } else {
1.41 espie 2252: return false;
1.1 deraadt 2253: }
2254: }
2255:
2256: /*-
2257: *-----------------------------------------------------------------------
2258: * JobMatchShell --
2259: * Find a matching shell in 'shells' given its final component.
2260: *
2261: * Results:
2262: * A pointer to the Shell structure.
2263: *-----------------------------------------------------------------------
2264: */
2265: static Shell *
1.56 espie 2266: JobMatchShell(char *name) /* Final component of shell path */
1.1 deraadt 2267: {
1.40 espie 2268: Shell *sh; /* Pointer into shells table */
2269: Shell *match; /* Longest-matching shell */
2270: char *cp1,
1.1 deraadt 2271: *cp2;
2272: char *eoname;
2273:
1.2 deraadt 2274: eoname = name + strlen(name);
1.1 deraadt 2275:
1.2 deraadt 2276: match = NULL;
1.1 deraadt 2277:
2278: for (sh = shells; sh->name != NULL; sh++) {
1.2 deraadt 2279: for (cp1 = eoname - strlen(sh->name), cp2 = sh->name;
1.1 deraadt 2280: *cp1 != '\0' && *cp1 == *cp2;
2281: cp1++, cp2++) {
2282: continue;
2283: }
2284: if (*cp1 != *cp2) {
2285: continue;
1.2 deraadt 2286: } else if (match == NULL || strlen(match->name) < strlen(sh->name)) {
2287: match = sh;
1.1 deraadt 2288: }
2289: }
1.40 espie 2290: return match == NULL ? sh : match;
1.1 deraadt 2291: }
2292:
2293: /*-
2294: *-----------------------------------------------------------------------
2295: * Job_ParseShell --
2296: * Parse a shell specification and set up commandShell, shellPath
2297: * and shellName appropriately.
2298: *
2299: * Results:
1.41 espie 2300: * false if the specification was incorrect.
1.1 deraadt 2301: *
2302: * Side Effects:
2303: * commandShell points to a Shell structure (either predefined or
2304: * created from the shell spec), shellPath is the full path of the
2305: * shell described by commandShell, while shellName is just the
2306: * final component of shellPath.
2307: *
2308: * Notes:
2309: * A shell specification consists of a .SHELL target, with dependency
2310: * operator, followed by a series of blank-separated words. Double
2311: * quotes can be used to use blanks in words. A backslash escapes
2312: * anything (most notably a double-quote and a space) and
2313: * provides the functionality it does in C. Each word consists of
2314: * keyword and value separated by an equal sign. There should be no
2315: * unnecessary spaces in the word. The keywords are as follows:
1.40 espie 2316: * name Name of shell.
2317: * path Location of shell. Overrides "name" if given
2318: * quiet Command to turn off echoing.
2319: * echo Command to turn echoing on
1.1 deraadt 2320: * filter Result of turning off echoing that shouldn't be
1.40 espie 2321: * printed.
1.1 deraadt 2322: * echoFlag Flag to turn echoing on at the start
2323: * errFlag Flag to turn error checking on at the start
2324: * hasErrCtl True if shell has error checking control
1.40 espie 2325: * check Command to turn on error checking if hasErrCtl
1.41 espie 2326: * is true or template of command to echo a command
1.40 espie 2327: * for which error checking is off if hasErrCtl is
1.41 espie 2328: * false.
1.1 deraadt 2329: * ignore Command to turn off error checking if hasErrCtl
1.41 espie 2330: * is true or template of command to execute a
1.40 espie 2331: * command so as to ignore any errors it returns if
1.41 espie 2332: * hasErrCtl is false.
1.1 deraadt 2333: *-----------------------------------------------------------------------
2334: */
1.41 espie 2335: bool
1.56 espie 2336: Job_ParseShell(const char *line) /* The shell spec */
1.1 deraadt 2337: {
1.40 espie 2338: char **words;
2339: int wordCount;
2340: char **argv;
2341: int argc;
2342: char *path;
2343: Shell newShell;
1.41 espie 2344: bool fullSpec = false;
1.1 deraadt 2345:
1.2 deraadt 2346: while (isspace(*line)) {
1.1 deraadt 2347: line++;
2348: }
1.12 espie 2349:
2350: efree(shellArgv);
1.40 espie 2351:
2352: words = brk_string(line, &wordCount, &shellArgv);
1.1 deraadt 2353:
1.28 espie 2354: memset(&newShell, 0, sizeof(newShell));
1.6 millert 2355:
1.1 deraadt 2356: /*
2357: * Parse the specification by keyword
2358: */
1.12 espie 2359: for (path = NULL, argc = wordCount - 1, argv = words;
1.1 deraadt 2360: argc != 0;
2361: argc--, argv++) {
1.2 deraadt 2362: if (strncmp(*argv, "path=", 5) == 0) {
1.1 deraadt 2363: path = &argv[0][5];
1.2 deraadt 2364: } else if (strncmp(*argv, "name=", 5) == 0) {
1.1 deraadt 2365: newShell.name = &argv[0][5];
2366: } else {
1.2 deraadt 2367: if (strncmp(*argv, "quiet=", 6) == 0) {
1.1 deraadt 2368: newShell.echoOff = &argv[0][6];
1.2 deraadt 2369: } else if (strncmp(*argv, "echo=", 5) == 0) {
1.1 deraadt 2370: newShell.echoOn = &argv[0][5];
1.2 deraadt 2371: } else if (strncmp(*argv, "filter=", 7) == 0) {
1.1 deraadt 2372: newShell.noPrint = &argv[0][7];
2373: newShell.noPLen = strlen(newShell.noPrint);
1.2 deraadt 2374: } else if (strncmp(*argv, "echoFlag=", 9) == 0) {
1.1 deraadt 2375: newShell.echo = &argv[0][9];
1.2 deraadt 2376: } else if (strncmp(*argv, "errFlag=", 8) == 0) {
1.1 deraadt 2377: newShell.exit = &argv[0][8];
1.2 deraadt 2378: } else if (strncmp(*argv, "hasErrCtl=", 10) == 0) {
1.1 deraadt 2379: char c = argv[0][10];
1.40 espie 2380: newShell.hasErrCtl = !(c != 'Y' && c != 'y' &&
2381: c != 'T' && c != 't');
1.2 deraadt 2382: } else if (strncmp(*argv, "check=", 6) == 0) {
1.1 deraadt 2383: newShell.errCheck = &argv[0][6];
1.2 deraadt 2384: } else if (strncmp(*argv, "ignore=", 7) == 0) {
1.1 deraadt 2385: newShell.ignErr = &argv[0][7];
2386: } else {
1.2 deraadt 2387: Parse_Error(PARSE_FATAL, "Unknown keyword \"%s\"",
1.1 deraadt 2388: *argv);
1.12 espie 2389: free(words);
1.41 espie 2390: return false;
1.1 deraadt 2391: }
1.41 espie 2392: fullSpec = true;
1.1 deraadt 2393: }
2394: }
2395:
1.2 deraadt 2396: if (path == NULL) {
1.1 deraadt 2397: /*
2398: * If no path was given, the user wants one of the pre-defined shells,
2399: * yes? So we find the one s/he wants with the help of JobMatchShell
2400: * and set things up the right way. shellPath will be set up by
2401: * Job_Init.
2402: */
1.2 deraadt 2403: if (newShell.name == NULL) {
2404: Parse_Error(PARSE_FATAL, "Neither path nor name specified");
1.41 espie 2405: return false;
1.1 deraadt 2406: } else {
1.2 deraadt 2407: commandShell = JobMatchShell(newShell.name);
1.1 deraadt 2408: shellName = newShell.name;
2409: }
2410: } else {
2411: /*
1.6 millert 2412: * The user provided a path. If s/he gave nothing else (fullSpec is
1.41 espie 2413: * false), try and find a matching shell in the ones we know of.
1.1 deraadt 2414: * Else we just take the specification at its word and copy it
2415: * to a new location. In either case, we need to record the
2416: * path the user gave for the shell.
2417: */
2418: shellPath = path;
1.2 deraadt 2419: path = strrchr(path, '/');
2420: if (path == NULL) {
1.1 deraadt 2421: path = shellPath;
2422: } else {
2423: path += 1;
2424: }
1.2 deraadt 2425: if (newShell.name != NULL) {
1.1 deraadt 2426: shellName = newShell.name;
2427: } else {
2428: shellName = path;
2429: }
2430: if (!fullSpec) {
1.2 deraadt 2431: commandShell = JobMatchShell(shellName);
1.1 deraadt 2432: } else {
1.40 espie 2433: commandShell = emalloc(sizeof(Shell));
1.1 deraadt 2434: *commandShell = newShell;
2435: }
2436: }
2437:
2438: if (commandShell->echoOn && commandShell->echoOff) {
1.41 espie 2439: commandShell->hasEchoCtl = true;
1.1 deraadt 2440: }
1.6 millert 2441:
1.1 deraadt 2442: if (!commandShell->hasErrCtl) {
1.2 deraadt 2443: if (commandShell->errCheck == NULL) {
1.1 deraadt 2444: commandShell->errCheck = "";
2445: }
1.2 deraadt 2446: if (commandShell->ignErr == NULL) {
1.1 deraadt 2447: commandShell->ignErr = "%s\n";
2448: }
2449: }
1.6 millert 2450:
1.1 deraadt 2451: /*
2452: * Do not free up the words themselves, since they might be in use by the
2453: * shell specification...
2454: */
1.2 deraadt 2455: free(words);
1.41 espie 2456: return true;
1.1 deraadt 2457: }
2458:
2459: /*-
2460: *-----------------------------------------------------------------------
2461: * JobInterrupt --
2462: * Handle the receipt of an interrupt.
2463: *
2464: * Side Effects:
2465: * All children are killed. Another job will be started if the
2466: * .INTERRUPT target was given.
2467: *-----------------------------------------------------------------------
2468: */
2469: static void
1.56 espie 2470: JobInterrupt(int runINTERRUPT, /* Non-zero if commands for the .INTERRUPT
1.1 deraadt 2471: * target should be executed */
1.56 espie 2472: int signo) /* signal received */
1.1 deraadt 2473: {
1.40 espie 2474: LstNode ln; /* element in job table */
2475: Job *job; /* job descriptor in that element */
2476: GNode *interrupt; /* the node describing the .INTERRUPT target */
1.6 millert 2477:
1.1 deraadt 2478: aborting = ABORT_INTERRUPT;
2479:
1.40 espie 2480: for (ln = Lst_First(&jobs); ln != NULL; ln = Lst_Adv(ln)) {
1.30 espie 2481: job = (Job *)Lst_Datum(ln);
1.1 deraadt 2482:
1.2 deraadt 2483: if (!Targ_Precious(job->node)) {
1.40 espie 2484: const char *file = job->node->path == NULL ?
1.1 deraadt 2485: job->node->name :
1.40 espie 2486: job->node->path;
1.2 deraadt 2487: if (!noExecute && eunlink(file) != -1) {
2488: Error("*** %s removed", file);
1.1 deraadt 2489: }
2490: }
2491: if (job->pid) {
1.2 deraadt 2492: if (DEBUG(JOB)) {
1.40 espie 2493: (void)fprintf(stdout,
1.51 mpech 2494: "JobInterrupt passing signal to child %ld.\n",
2495: (long)job->pid);
1.40 espie 2496: (void)fflush(stdout);
1.2 deraadt 2497: }
2498: KILL(job->pid, signo);
2499: }
1.1 deraadt 2500: }
2501:
2502: if (runINTERRUPT && !touchFlag) {
1.41 espie 2503: interrupt = Targ_FindNode(".INTERRUPT", TARG_NOCREATE);
1.18 espie 2504: if (interrupt != NULL) {
1.41 espie 2505: ignoreErrors = false;
1.1 deraadt 2506:
1.2 deraadt 2507: JobStart(interrupt, JOB_IGNDOTS, (Job *)0);
1.1 deraadt 2508: while (nJobs) {
2509: Job_CatchOutput();
1.2 deraadt 2510: Job_CatchChildren(!usePipes);
1.1 deraadt 2511: }
2512: }
2513: }
1.40 espie 2514: (void)eunlink(tfile);
1.2 deraadt 2515: exit(signo);
1.1 deraadt 2516: }
2517:
2518: /*
2519: *-----------------------------------------------------------------------
1.12 espie 2520: * Job_Finish --
1.1 deraadt 2521: * Do final processing such as the running of the commands
1.6 millert 2522: * attached to the .END target.
1.1 deraadt 2523: *
2524: * Results:
2525: * Number of errors reported.
1.40 espie 2526: *
2527: * Side Effects:
2528: * The process' temporary file (tfile) is removed if it still
2529: * existed.
1.1 deraadt 2530: *-----------------------------------------------------------------------
2531: */
2532: int
1.56 espie 2533: Job_Finish(void)
1.1 deraadt 2534: {
1.29 espie 2535: if (postCommands != NULL && !Lst_IsEmpty(&postCommands->commands)) {
1.1 deraadt 2536: if (errors) {
1.2 deraadt 2537: Error("Errors reported so .END ignored");
1.1 deraadt 2538: } else {
1.2 deraadt 2539: JobStart(postCommands, JOB_SPECIAL | JOB_IGNDOTS, NULL);
1.1 deraadt 2540:
2541: while (nJobs) {
2542: Job_CatchOutput();
1.2 deraadt 2543: Job_CatchChildren(!usePipes);
1.1 deraadt 2544: }
2545: }
2546: }
1.40 espie 2547: (void)eunlink(tfile);
2548: return errors;
1.1 deraadt 2549: }
2550:
1.12 espie 2551: /*-
2552: *-----------------------------------------------------------------------
2553: * Job_End --
2554: * Cleanup any memory used by the jobs module
2555: *
2556: * Side Effects:
2557: * Memory is freed
2558: *-----------------------------------------------------------------------
2559: */
1.41 espie 2560: #ifdef CLEANUP
1.12 espie 2561: void
1.56 espie 2562: Job_End(void)
1.12 espie 2563: {
2564: efree(shellArgv);
1.41 espie 2565: }
1.13 espie 2566: #endif
1.40 espie 2567:
1.1 deraadt 2568: /*-
2569: *-----------------------------------------------------------------------
2570: * Job_Wait --
2571: * Waits for all running jobs to finish and returns. Sets 'aborting'
2572: * to ABORT_WAIT to prevent other jobs from starting.
2573: *
2574: * Side Effects:
2575: * Currently running jobs finish.
2576: *
2577: *-----------------------------------------------------------------------
2578: */
2579: void
1.56 espie 2580: Job_Wait(void)
1.1 deraadt 2581: {
2582: aborting = ABORT_WAIT;
2583: while (nJobs != 0) {
2584: Job_CatchOutput();
2585: Job_CatchChildren(!usePipes);
2586: }
2587: aborting = 0;
2588: }
2589:
2590: /*-
2591: *-----------------------------------------------------------------------
2592: * Job_AbortAll --
2593: * Abort all currently running jobs without handling output or anything.
2594: * This function is to be called only in the event of a major
2595: * error. Most definitely NOT to be called from JobInterrupt.
2596: *
2597: * Side Effects:
2598: * All children are killed, not just the firstborn
2599: *-----------------------------------------------------------------------
2600: */
2601: void
1.56 espie 2602: Job_AbortAll(void)
1.1 deraadt 2603: {
1.40 espie 2604: LstNode ln; /* element in job table */
2605: Job *job; /* the job descriptor in that element */
2606: int foo;
1.6 millert 2607:
1.1 deraadt 2608: aborting = ABORT_ERROR;
1.6 millert 2609:
1.1 deraadt 2610: if (nJobs) {
1.40 espie 2611: for (ln = Lst_First(&jobs); ln != NULL; ln = Lst_Adv(ln)) {
1.30 espie 2612: job = (Job *)Lst_Datum(ln);
1.1 deraadt 2613:
2614: /*
2615: * kill the child process with increasingly drastic signals to make
1.6 millert 2616: * darn sure it's dead.
1.1 deraadt 2617: */
2618: KILL(job->pid, SIGINT);
2619: KILL(job->pid, SIGKILL);
2620: }
2621: }
1.6 millert 2622:
1.1 deraadt 2623: /*
2624: * Catch as many children as want to report in at first, then give up
2625: */
1.51 mpech 2626: while (waitpid(-1, &foo, WNOHANG) > 0)
1.1 deraadt 2627: continue;
1.40 espie 2628: (void)eunlink(tfile);
1.2 deraadt 2629: }
1.40 espie 2630:
1.2 deraadt 2631: /*-
2632: *-----------------------------------------------------------------------
2633: * JobRestartJobs --
2634: * Tries to restart stopped jobs if there are slots available.
2635: * Note that this tries to restart them regardless of pending errors.
2636: * It's not good to leave stopped jobs lying around!
2637: *
2638: * Side Effects:
2639: * Resumes(and possibly migrates) jobs.
2640: *-----------------------------------------------------------------------
2641: */
2642: static void
1.56 espie 2643: JobRestartJobs(void)
1.2 deraadt 2644: {
1.19 espie 2645: Job *job;
2646:
1.40 espie 2647: while (!jobFull && (job = (Job *)Lst_DeQueue(&stoppedJobs)) != NULL) {
1.2 deraadt 2648: if (DEBUG(JOB)) {
1.40 espie 2649: (void)fprintf(stdout,
1.2 deraadt 2650: "Job queue is not full. Restarting a stopped job.\n");
1.40 espie 2651: (void)fflush(stdout);
1.2 deraadt 2652: }
1.19 espie 2653: JobRestart(job);
1.2 deraadt 2654: }
1.1 deraadt 2655: }
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