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source: trunk/tools/CmdQd/CmdQd.c@ 6631

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Last change on this file since 6631 was 6631, checked in by bird, 24 years ago
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1	/* $Id: CmdQd.c,v 1.6 2001-09-04 13:29:49 bird Exp $
2	*
3	* Command Queue Daemon / Client.
4	*
5	* Designed to execute commands asyncronus using multiple workers,
6	* and when all commands are submitted wait for them to complete.
7	*
8	* Copyright (c) 2001 knut st. osmundsen (kosmunds@csc.com)
9	*
10	* GPL
11	*
12	*/
13
14
15	/** @design Command Queue Daemon.
16	*
17	* This command daemon orginated as tool to exploit SMP and UNI systems better
18	* when building large programs, but also when building one specific component of
19	* that program. It is gonna work just like the gnu make -j option.
20	*
21	* @subsection Work flow
22	*
23	* 1. Init daemon process. Creates a daemon process with a given number of
24	* workers. This is a detached process.
25	* 2. Submit jobs to the daemon. The daemon will queue the jobs and the
26	* workers will start working at once there is a job for them.
27	* 3. The nmake script will issue a wait command. We will now wait for all
28	* jobs to finish and in the mean time we'll display output from the jobs.
29	* Failing jobs will be queued up and show when all jobs are finished.
30	* 4. Two options: kill the daemon or start at step 2 again.
31	*
32	*
33	* @subsection Client <-> Daemon communication
34	*
35	* Client and daemon is one and the same executable. This has some advantages
36	* like implicit preloading of the client, fewer source files and fewer programs
37	* to install.
38	*
39	* The communication between the client and the daemon will use shared memory
40	* with an mutex semaphore and two event sems to direct the conversation. The
41	* shared memory block is allocated by the daemon and will have a quite simple
42	* layout:
43	* Mutex Semaphore.
44	* Message Type.
45	* Message specific data:
46	* - Submit job:
47	* Returcode ignore. (4 bytes)
48	* Command to execute. (1 Kb)
49	* Current directory. (260 bytes)
50	* Environment block. (about 62KB)
51	* - Submit job response:
52	* Success/failure indicator.
53	*
54	* - Wait:
55	* Nothing.
56	* - Wait response:
57	* More output indicator.
58	* Success/failure indicator.
59	* Job output (about 63KB)
60	*
61	* - Kill:
62	* Nothing.
63	* - Kill response:
64	* Success/failure indicator.
65	*
66	* - Dies:
67	* Nothing. This is a message to the client saying that the
68	* daemon is dying or allready dead.
69	*
70	* The shared memory block is 64KB.
71	*
72	*
73	* @subsection The Workers
74	*
75	* The workers is individual threads which waits for a job to be submitted to
76	* execution. If the job only contains a single executable program to execute
77	* (no & or &&) it will be executed using DosExecPgm. If it's a multi program
78	* or command job it will be executed by CMD.EXE.
79	*
80	* Output will be read using unamed pipe and buffered. When the job is
81	* completed we'll put the output into either the success queue or the failure
82	* queue depending on the result.
83	*
84	* Note. Process startup needs to be serialized in order to be able to redirect
85	* stdout. We're using a mutex for this.
86	*
87	*/
88
89
90	/*******************************************************************************
91	* Header Files *
92	*******************************************************************************/
93	#include <stdio.h>
94	#include <string.h>
95	#include <stdlib.h>
96	#include <stdarg.h>
97	#include <assert.h>
98	#include <direct.h>
99	#include <signal.h>
100	#include <process.h>
101
102	#define INCL_BASE
103	#include <os2.h>
104
105
106	/*
107	* Memory debugging.
108	*/
109	#ifdef DEBUGMEMORY
110	void my_free(void *);
111	void *my_malloc(size_t);
112
113	#undef free
114	#undef malloc
115
116	#define free(pv) my_free(pv)
117	#define malloc(cb) my_malloc(cb)
118
119	#endif
120
121	/*******************************************************************************
122	* Defined Constants And Macros *
123	*******************************************************************************/
124	#define SHARED_MEM_NAME "\\SHAREMEM\\CmdQd"
125	#define SHARED_MEM_SIZE 65536
126	#define IDLE_TIMEOUT_MS -1 //(6010003)
127	#define OUTPUT_CHUNK (8192-8)
128
129	#define HF_STDIN 0
130	#define HF_STDOUT 1
131	#define HF_STDERR 2
132
133	/*******************************************************************************
134	* Structures and Typedefs *
135	*******************************************************************************/
136	typedef struct SharedMem
137	{
138	HEV hevClient; /* Client will wait on this. */
139	HEV hevDaemon; /* Daemon will wait on this. */
140	HMTX hmtx; /* Owner of the shared memory. */
141	HMTX hmtxClient; /* Take and release this for each */
142	/* client -> server -> client talk. */
143	enum
144	{
145	msgUnknown = 0,
146	msgSubmit = 1,
147	msgSubmitResponse = 2,
148	msgWait = 3,
149	msgWaitResponse = 4,
150	msgKill = 5,
151	msgKillResponse = 6,
152	msgDying = 0xff
153	} enmMsgType;
154
155	union
156	{
157	struct Submit
158	{
159	unsigned rcIgnore; /* max return code to accept as good. */
160	char szCommand[1024]; /* job command. */
161	char szCurrentDir[CCHMAXPATH]; /* current directory. */
162	int cchEnv; /* Size of the environment block */
163	char szzEnv[SHARED_MEM_SIZE - CCHMAXPATH - 1024 - 4 - 4 - 4 - 4 - 4 - 4];
164	/* Environment block. */
165	} Submit;
166
167	struct SubmitResponse
168	{
169	BOOL fRc; /* Success idicator. */
170	} SubmitResponse;
171
172
173	struct Wait
174	{
175	int iNothing; /* Dummy. */
176	} Wait;
177
178	struct WaitResponse
179	{
180	BOOL fMore; /* More data. */
181	int rc; /* return code of first failing job. */
182	/* only valid if fMore == FALSE. */
183	char szOutput[SHARED_MEM_SIZE- 4 - 4 - 4 - 4 - 4 - 4 - 4];
184	/* The output of one or more jobs. */
185	} WaitResponse;
186
187
188	struct Kill
189	{
190	int iNothing; /* dummy. */
191	} Kill;
192
193	struct KillResponse
194	{
195	BOOL fRc; /* Success idicator. */
196	} KillResponse;
197
198	} u1;
199
200	} SHAREDMEM, *PSHAREDMEM;
201
202
203	typedef struct JobOutput
204	{
205	struct JobOutput * pNext; /* Pointer to next output chunk. */
206	int cchOutput; /* Bytes used of the szOutput member. */
207	char szOutput[OUTPUT_CHUNK]; /* Output. */
208	} JOBOUTPUT, *PJOBOUTPUT;
209
210
211	typedef struct Job
212	{
213	struct Job * pNext; /* Pointer to next job. */
214	int rc; /* Result. */
215	PJOBOUTPUT pJobOutput; /* Output. */
216	struct Submit JobInfo; /* Job. */
217	} JOB, *PJOB;
218
219
220	typedef struct PathCache
221	{
222	char szPath[4096 - CCHMAXPATH * 3]; /* The path which this is valid for. */
223	char szCurDir[CCHMAXPATH]; /* The current dir this is valid for. */
224	char szProgram[CCHMAXPATH]; /* The program. */
225	char szResult[CCHMAXPATH]; /* The result. */
226	} PATHCACHE, *PPATHCACHE;
227
228
229	/*******************************************************************************
230	* Global Variables *
231	*******************************************************************************/
232	PSHAREDMEM pShrMem; /* Pointer to the shared memory. */
233
234	PJOB pJobQueue; /* Linked list of jobs. */
235	PJOB pJobQueueEnd; /* Last job entry. */
236	HMTX hmtxJobQueue; /* Read/Write mutex. */
237	HEV hevJobQueue; /* Incomming job event sem. */
238	ULONG cJobs; /* Count of jobs submitted. */
239
240	HMTX hmtxJobQueueFine; /* Read/Write mutex for the next two queues. */
241	HEV hevJobQueueFine; /* Posted when there is more output. */
242	PJOB pJobCompleted; /* Linked list of successful jobs. */
243	PJOB pJobCompletedLast; /* Last successful job entry. */
244	PJOB pJobFailed; /* Linked list of failed jobs. */
245	PJOB pJobFailedLast; /* Last failed job entry. */
246	ULONG cJobsFinished; /* Count of jobs finished (failed or completed). */
247
248	HMTX hmtxExec; /* Execute childs mutex sem. Required */
249	/* since we redirect standard files handles */
250	/* and changes the currentdirectory. */
251
252	/*******************************************************************************
253	* Internal Functions *
254	*******************************************************************************/
255	void syntax(void);
256
257	/* operations */
258	int Init(const char *arg0, int cWorkers);
259	int Daemon(int cWorkers);
260	int DaemonInit(int cWorkers);
261	void signalhandlerDaemon(int sig);
262	void signalhandlerClient(int sig);
263	void Worker(void * iWorkerId);
264	charWorkerArguments(char pszArg, const char pszzEnv, const char pszCommand, char *pszCurDir, PPATHCACHE pPathCache);
265	charfileNormalize(char pszFilename, char *pszCurDir);
266	APIRET fileExist(const char *pszFilename);
267	int Submit(int rcIgnore);
268	int Wait(void);
269	int Kill(void);
270
271	/* shared memory helpers */
272	int shrmemCreate(void);
273	int shrmemOpen(void);
274	void shrmemFree(void);
275	int shrmemSendDaemon(BOOL fWait);
276	int shrmemSendClient(int enmMsgTypeResponse);
277
278	/* error handling */
279	void _Optlink Error(const char *pszFormat, ...);
280
281
282	int main(int argc, char **argv)
283	{
284
285	/*
286	* Display help.
287	*/
288	if (argc < 2 \|\| (argv[1][0] == '-'))
289	{
290	syntax();
291	if (argc < 2)
292	{
293	printf("\n!syntax error!");
294	return -1;
295	}
296	return 0;
297	}
298
299	/*
300	* String switch on command.
301	*/
302	if (!stricmp(argv[1], "submit"))
303	{
304	int rcIgnore = 0;
305	if (argc == 2)
306	{
307	printf("fatal error: There is no job to submit...\n");
308	return -1;
309	}
310	if (argv[2][0] == '-' && (rcIgnore = atoi(argv[2]+1)) <= 0)
311	{
312	printf("syntax error: Invalid ignore return code number...\n");
313	return -1;
314	}
315	return Submit(rcIgnore);
316	}
317	else if (!stricmp(argv[1], "wait"))
318	{
319	return Wait();
320	}
321	else if (!strcmp(argv[1], "kill"))
322	{
323	return Kill();
324	}
325	else if (!strcmp(argv[1], "init"))
326	{
327	if (argc != 3 \|\| atoi(argv[2]) <= 0 \|\| atoi(argv[2]) >= 256)
328	{
329	printf("fatal error: invalid/missing number of workers.\n");
330	return -1;
331	}
332	return Init(argv[0], atoi(argv[2]));
333	}
334	else if (!strcmp(argv[1], "!Daemon!"))
335	{
336	if (argc != 3 \|\| atoi(argv[2]) <= 0)
337	{
338	printf("fatal error: no worker count specified or to many parameters.\n");
339	return -2;
340	}
341
342	return Daemon(atoi(argv[2]));
343	}
344	else
345	{
346	syntax();
347	printf("\n!invalid command '%s'.\n", argv[1]);
348	return -1;
349	}
350
351	//return 0;
352	}
353
354
355	/**
356	* Display syntax.
357	*/
358	void syntax(void)
359	{
360	printf(
361	"Command Queue Daemon v0.0.1\n"
362	"---------------------------\n"
363	"syntax: CmdQd.exe <command> [args]\n"
364	"\n"
365	"commands:\n"
366	" init <workers>\n"
367	" Initiates the command queue daemon with the given number of workers.\n"
368	"\n"
369	" submit [-<n>] <command> [args]\n"
370	" Submits a command to the daemon.\n"
371	" Use '-<n>' to tell use to ignore return code 0-n.\n"
372	" \n"
373	" wait\n"
374	" Wait for all commands which are queued up to complete.\n"
375	" rc = count of failing commands.\n"
376	" \n"
377	" kill\n"
378	" Kills the daemon. Daemon will automatically die after\n"
379	" idling for some time.\n"
380	"\n"
381	"Copyright (c) 2001 knut st. osmundsen (kosmunds@csc.com)\n"
382	);
383	}
384
385
386	/**
387	* Starts a daemon process.
388	* @returns 0 on success.
389	* -4 on error.
390	* @param arg0 Executable filename.
391	* @param cWorkers Number of workers to start.
392	*/
393	int Init(const char *arg0, int cWorkers)
394	{
395	int rc;
396	RESULTCODES Res; /* dummy, unused */
397	char szArg[CCHMAXPATH + 32];
398
399	sprintf(&szArg[0], "%s\t!Daemon! %d", arg0, cWorkers);
400	szArg[strlen(arg0)] = '\0';
401	rc = DosExecPgm(NULL, 0, EXEC_BACKGROUND, &szArg[0], NULL, &Res, &szArg[0]);
402	if (rc)
403	Error("Fatal error: Failed to start daemon. rc=%d\n");
404	return rc;
405	}
406
407
408	/**
409	* This process is to be a daemon with a given number of works.
410	* @returns 0 on success.
411	* -4 on error.
412	* @param cWorkers Number of workers to start.
413	* @sketch
414	*/
415	int Daemon(int cWorkers)
416	{
417	int rc;
418
419	/*
420	* Init Shared memory
421	*/
422	rc = shrmemCreate();
423	if (rc)
424	return rc;
425
426	/*
427	* Init queues and semaphores.
428	*/
429	rc = DaemonInit(cWorkers);
430	if (rc)
431	{
432	shrmemFree();
433	return rc;
434	}
435
436	/*
437	* Do work!
438	*/
439	rc = shrmemSendDaemon(TRUE);
440	while (!rc)
441	{
442	switch (pShrMem->enmMsgType)
443	{
444	case msgSubmit:
445	{
446	PJOB pJob;
447
448	/*
449	* Make job entry.
450	*/
451	_heap_check();
452	pJob = malloc((int)&((PJOB)0)->JobInfo.szzEnv[pShrMem->u1.Submit.cchEnv]);
453	if (pJob)
454	{
455	_heap_check();
456	memcpy(&pJob->JobInfo, &pShrMem->u1.Submit,
457	(int)&((struct Submit *)0)->szzEnv[pShrMem->u1.Submit.cchEnv]);
458	_heap_check();
459	pJob->rc = -1;
460	pJob->pNext = NULL;
461	pJob->pJobOutput = NULL;
462
463	/*
464	* Insert the entry.
465	*/
466	rc = DosRequestMutexSem(hmtxJobQueue, SEM_INDEFINITE_WAIT);
467	if (rc)
468	break;
469	if (!pJobQueue)
470	pJobQueueEnd = pJobQueue = pJob;
471	else
472	{
473	pJobQueueEnd->pNext = pJob;
474	pJobQueueEnd = pJob;
475	}
476	cJobs++;
477	DosReleaseMutexSem(hmtxJobQueue);
478
479	/*
480	* Post the queue to wake up workers.
481	*/
482	DosPostEventSem(hevJobQueue);
483	pShrMem->u1.SubmitResponse.fRc = TRUE;
484	}
485	else
486	{
487	Error("Internal Error: Out of memory (line=%d)\n", __LINE__);
488	pShrMem->u1.SubmitResponse.fRc = FALSE;
489	}
490	pShrMem->enmMsgType = msgSubmitResponse;
491	rc = shrmemSendDaemon(TRUE);
492	break;
493	}
494
495
496	case msgWait:
497	{
498	PJOB pJob = NULL;
499	PJOBOUTPUT pJobOutput = NULL;
500	char * psz;
501	int cch = 0;
502	char * pszOutput;
503	int cchOutput;
504	int rcFailure = 0;
505	BOOL fMore = TRUE;
506	ULONG ulIgnore;
507	void * pv;
508
509	DosPostEventSem(hevJobQueueFine); /* just so we don't get stuck in the loop... */
510	do
511	{
512	/* init response message */
513	pShrMem->enmMsgType = msgWaitResponse;
514	pShrMem->u1.WaitResponse.szOutput[0] = '\0';
515	pszOutput = &pShrMem->u1.WaitResponse.szOutput[0];
516	cchOutput = sizeof(pShrMem->u1.WaitResponse.szOutput) - 1;
517
518	/*
519	* Wait for output.
520	*/
521	/rc = DosWaitEventSem(hevJobQueueFine, SEM_INDEFINITE_WAIT); - there is some timing problem here, /
522	rc = DosWaitEventSem(hevJobQueueFine, 1000); /* timeout after 1 second. */
523	if (rc && rc != ERROR_TIMEOUT)
524	break;
525	rc = NO_ERROR; /* in case of TIMEOUT */
526
527	/*
528	* Copy output - Optimized so we don't cause to many context switches.
529	*/
530	do
531	{
532	/*
533	* Next job.
534	*/
535	if (!pJobOutput)
536	{
537	rc = DosRequestMutexSem(hmtxJobQueueFine, SEM_INDEFINITE_WAIT);
538	if (rc)
539	break;
540	pv = pJob;
541	pJob = pJobCompleted;
542	if (pJob)
543	{
544	pJobCompleted = pJob->pNext;
545	if (!pJobCompleted)
546	pJobCompletedLast = NULL;
547	}
548
549	if (!pJob && cJobs == cJobsFinished)
550	{ /* all jobs finished, we may start output failures. */
551	pJob = pJobFailed;
552	if (pJob)
553	{
554	if (rcFailure == 0)
555	rcFailure = pJob->rc;
556
557	pJobFailed = pJob->pNext;
558	if (!pJobFailed)
559	pJobFailedLast = NULL;
560	}
561	else
562	fMore = FALSE;
563	}
564	else
565	DosResetEventSem(hevJobQueueFine, &ulIgnore); /* No more output, prepare wait. */
566	DosReleaseMutexSem(hmtxJobQueueFine);
567
568	if (pJob && pJob->pJobOutput)
569	{
570	pJobOutput = pJob->pJobOutput;
571	psz = pJobOutput->szOutput;
572	cch = pJobOutput->cchOutput;
573	}
574	if (pv)
575	free(pv);
576	}
577
578	/*
579	* Anything to output?
580	*/
581	if (pJobOutput)
582	{
583	/*
584	* Copy output.
585	*/
586	do
587	{
588	if (cch)
589	{ /* copy */
590	int cchCopy = min(cch, cchOutput);
591	memcpy(pszOutput, psz, cchCopy);
592	psz += cchCopy; cch -= cchCopy;
593	pszOutput += cchCopy; cchOutput -= cchCopy;
594	}
595	if (!cch)
596	{ /* next chunk */
597	pv = pJobOutput;
598	pJobOutput = pJobOutput->pNext;
599	if (pJobOutput)
600	{
601	psz = &pJobOutput->szOutput[0];
602	cch = pJobOutput->cchOutput;
603	}
604	free(pv);
605	}
606	} while (cch && cchOutput);
607	}
608	else
609	break; /* no more output, let's send what we got. */
610
611	} while (!rc && fMore && cchOutput);
612
613	/*
614	* We've got a message to send.
615	*/
616	if (rc)
617	break;
618	*pszOutput = '\0';
619	pShrMem->u1.WaitResponse.rc = rcFailure;
620	pShrMem->u1.WaitResponse.fMore = fMore;
621	rc = shrmemSendDaemon(TRUE);
622	} while (!rc && fMore);
623	break;
624	}
625
626
627	case msgKill:
628	{
629	pShrMem->enmMsgType = msgKillResponse;
630	pShrMem->u1.KillResponse.fRc = TRUE;
631	shrmemSendDaemon(FALSE);
632	rc = -1;
633	break;
634	}
635
636	default:
637	Error("Internal error: Invalid message id %d\n", pShrMem->enmMsgType);
638	pShrMem->enmMsgType = msgUnknown;
639	rc = shrmemSendDaemon(TRUE);
640	}
641	}
642
643	/*
644	* Set dying msg type. shrmemFree posts the hevClient so clients
645	* waiting for the daemon to respond will quit.
646	*/
647	pShrMem->enmMsgType = msgDying;
648
649	/*
650	* Cleanup.
651	*/
652	shrmemFree();
653	DosCloseMutexSem(hmtxJobQueue);
654	DosCloseMutexSem(hmtxJobQueueFine);
655	DosCloseEventSem(hevJobQueueFine);
656	DosCloseMutexSem(hmtxExec);
657	DosCloseEventSem(hevJobQueue);
658
659	_dump_allocated(16);
660
661	return 0;
662	}
663
664
665	/**
666	* Help which does most of the daemon init stuff.
667	* @returns 0 on success.
668	* @param cWorkers Number of worker threads to start.
669	*/
670	int DaemonInit(int cWorkers)
671	{
672	int rc;
673	int i;
674
675	/*
676	* Init queues and semaphores.
677	*/
678	rc = DosCreateEventSem(NULL, &hevJobQueue, 0, FALSE);
679	if (!rc)
680	{
681	rc = DosCreateMutexSem(NULL, &hmtxJobQueue, 0, FALSE);
682	if (!rc)
683	{
684	rc = DosCreateMutexSem(NULL, &hmtxJobQueueFine, 0, FALSE);
685	if (!rc)
686	{
687	rc = DosCreateEventSem(NULL, &hevJobQueueFine, 0, FALSE);
688	if (!rc)
689	{
690	rc = DosCreateMutexSem(NULL, &hmtxExec, 0, FALSE);
691	if (!rc)
692	{
693	/*
694	* Start workers.
695	*/
696	rc = 0;
697	for (i = 0; i < cWorkers; i++)
698	if (_beginthread(Worker, NULL, 641024, (void)i) == -1)
699	{
700	Error("Fatal error: failed to create worker thread no. %d\n", i);
701	rc = -1;
702	break;
703	}
704	if (!rc)
705	{
706	DosSetMaxFH(cWorkers * 6 + 20);
707	return 0; /* success! */
708	}
709
710	/* failure */
711	DosCloseMutexSem(hmtxExec);
712	}
713	else
714	Error("Fatal error: failed to create exec mutex. rc=%d", rc);
715	DosCloseEventSem(hevJobQueueFine);
716	}
717	else
718	Error("Fatal error: failed to create job queue fine event sem. rc=%d", rc);
719	DosCloseMutexSem(hmtxJobQueueFine);
720	}
721	else
722	Error("Fatal error: failed to create job queue fine mutex. rc=%d", rc);
723	DosCloseMutexSem(hmtxJobQueue);
724	}
725	else
726	Error("Fatal error: failed to create job queue mutex. rc=%d", rc);
727	DosCloseEventSem(hevJobQueue);
728	}
729	else
730	Error("Fatal error: failed to create job queue event sem. rc=%d", rc);
731
732	return rc;
733	}
734
735
736	/**
737	* Daemon signal handler.
738	*/
739	void signalhandlerDaemon(int sig)
740	{
741	/*
742	* Set dying msg type. shrmemFree posts the hevClient so clients
743	* waiting for the daemon to respond will quit.
744	*/
745	pShrMem->enmMsgType = msgDying;
746
747	/*
748	* Free and exit.
749	*/
750	shrmemFree();
751	exit(-42);
752	sig = sig;
753	}
754
755
756	/**
757	* Client signal handler.
758	*/
759	void signalhandlerClient(int sig)
760	{
761	shrmemFree();
762	exit(-42);
763	sig = sig;
764	}
765
766
767
768	/**
769	* Worker thread.
770	* @param iWorkerId The worker process id.
771	* @sketch
772	*/
773	void Worker(void * iWorkerId)
774	{
775	PATHCACHE PathCache;
776	memset(&PathCache, 0, sizeof(PathCache));
777
778	while (!DosWaitEventSem(hevJobQueue, SEM_INDEFINITE_WAIT))
779	{
780	PJOB pJob;
781
782	/*
783	* Get job.
784	*/
785	if (DosRequestMutexSem(hmtxJobQueue, SEM_INDEFINITE_WAIT))
786	return;
787	pJob = pJobQueue;
788	if (pJob)
789	{
790	if (pJob != pJobQueueEnd)
791	pJobQueue = pJob->pNext;
792	else
793	{
794	ULONG ulIgnore;
795	pJobQueue = pJobQueueEnd = NULL;
796	DosResetEventSem(hevJobQueue, &ulIgnore);
797	}
798	}
799	DosReleaseMutexSem(hmtxJobQueue);
800
801	/*
802	* Execute job.
803	*/
804	if (pJob)
805	{
806	int rc;
807	char szArg[4096];
808	char szObj[256];
809	PJOBOUTPUT pJobOutput = NULL;
810	PJOBOUTPUT pJobOutputLast = NULL;
811	RESULTCODES Res;
812	PID pid;
813	HFILE hStdOut = HF_STDOUT;
814	HFILE hStdErr = HF_STDERR;
815	HFILE hStdOutSave = -1;
816	HFILE hStdErrSave = -1;
817	HPIPE hPipeR = NULLHANDLE;
818	HPIPE hPipeW = NULLHANDLE;
819
820	//printf("debug-%d: start %s\n", iWorkerId, pJob->JobInfo.szCommand);
821
822	/*
823	* Redirect output and start process.
824	*/
825	WorkerArguments(&szArg[0], &pJob->JobInfo.szzEnv[0], &pJob->JobInfo.szCommand[0],
826	&pJob->JobInfo.szCurrentDir[0], &PathCache);
827	rc = DosCreatePipe(&hPipeR, &hPipeW, sizeof(pJobOutput->szOutput) - 1);
828	if (rc)
829	{
830	Error("Internal Error: Failed to create pipe! rc=%d\n", rc);
831	return;
832	}
833
834	if (DosRequestMutexSem(hmtxExec, SEM_INDEFINITE_WAIT))
835	{
836	DosClose(hPipeR);
837	DosClose(hPipeW);
838	return;
839	}
840
841	pJob->pJobOutput = pJobOutput = pJobOutputLast = malloc(sizeof(JOBOUTPUT));
842	pJobOutput->pNext = NULL;
843	pJobOutput->cchOutput = sprintf(pJobOutput->szOutput, "Job: %s\n", pJob->JobInfo.szCommand);
844
845	rc = DosSetDefaultDisk( pJob->JobInfo.szCurrentDir[0] >= 'a'
846	? pJob->JobInfo.szCurrentDir[0] - 'a' + 1
847	: pJob->JobInfo.szCurrentDir[0] - 'A' + 1);
848	rc += DosSetCurrentDir(pJob->JobInfo.szCurrentDir);
849	if (!rc)
850	{
851	assert( pJob->JobInfo.szzEnv[pJob->JobInfo.cchEnv-1] == '\0'
852	&& pJob->JobInfo.szzEnv[pJob->JobInfo.cchEnv-2] == '\0');
853	DosDupHandle(HF_STDOUT, &hStdOutSave);
854	DosDupHandle(HF_STDERR, &hStdErrSave);
855	DosDupHandle(hPipeW, &hStdOut);
856	DosDupHandle(hPipeW, &hStdErr);
857	rc = DosExecPgm(szObj, sizeof(szObj), EXEC_ASYNCRESULT,
858	szArg, pJob->JobInfo.szzEnv, &Res, szArg);
859	DosClose(hStdOut); hStdOut = HF_STDOUT;
860	DosClose(hStdErr); hStdErr = HF_STDERR;
861	DosDupHandle(hStdOutSave, &hStdOut);
862	DosDupHandle(hStdErrSave, &hStdErr);
863	DosClose(hStdOutSave);
864	DosClose(hStdErrSave);
865	DosReleaseMutexSem(hmtxExec);
866	DosClose(hPipeW);
867
868
869	/*
870	* Read Output.
871	*/
872	if (!rc)
873	{
874	ULONG cchRead;
875	ULONG cchRead2 = 0;
876
877	cchRead = sizeof(pJobOutput->szOutput) - pJobOutput->cchOutput - 1;
878	while (((rc = DosRead(hPipeR,
879	&pJobOutput->szOutput[pJobOutput->cchOutput],
880	cchRead, &cchRead2)) == NO_ERROR
881	\|\| rc == ERROR_MORE_DATA)
882	&& cchRead2 != 0)
883	{
884	pJobOutput->cchOutput += cchRead2;
885	pJobOutput->szOutput[pJobOutput->cchOutput] = '\0';
886
887	/* prepare next read */
888	cchRead = sizeof(pJobOutput->szOutput) - pJobOutput->cchOutput - 1;
889	if (cchRead < 16)
890	{
891	pJobOutput = pJobOutput->pNext = malloc(sizeof(JOBOUTPUT));
892	pJobOutput->pNext = NULL;
893	pJobOutput->cchOutput = 0;
894	cchRead = sizeof(pJobOutput->szOutput) - 1;
895	}
896	cchRead2 = 0;
897	}
898	rc = 0;
899	}
900
901	/* finished reading */
902	DosClose(hPipeR);
903
904	/*
905	* Get result.
906	*/
907	if (!rc)
908	{
909	DosWaitChild(DCWA_PROCESS, DCWW_WAIT, &Res, &pid, Res.codeTerminate);
910	if ( Res.codeResult <= pJob->JobInfo.rcIgnore
911	&& Res.codeTerminate == TC_EXIT)
912	pJob->rc = 0;
913	else
914	{
915	pJob->rc = -1;
916	rc = sprintf(szArg, "failed with rc=%d term=%d\n", Res.codeResult, Res.codeTerminate);
917	if (rc + pJobOutput->cchOutput + 1 >= sizeof(pJobOutput->szOutput))
918	{
919	pJobOutput = pJobOutput->pNext = malloc(sizeof(JOBOUTPUT));
920	pJobOutput->pNext = NULL;
921	pJobOutput->cchOutput = 0;
922	}
923	strcpy(&pJobOutput->szOutput[pJobOutput->cchOutput], szArg);
924	pJobOutput->cchOutput += rc;
925	}
926	}
927	else
928	{
929	pJobOutput->cchOutput += sprintf(&pJobOutput->szOutput[pJobOutput->cchOutput],
930	"DosExecPgm failed with rc=%d for command %s %s\n"
931	" obj=%s\n",
932	rc, szArg, pJob->JobInfo.szCommand, szObj);
933	pJob->rc = -1;
934	}
935	}
936	else
937	{
938	/*
939	* ChDir failed.
940	*/
941	DosReleaseMutexSem(hmtxExec);
942	pJobOutput->cchOutput += sprintf(&pJobOutput->szOutput[pJobOutput->cchOutput ],
943	"Failed to set current directory to: %s\n",
944	pJob->JobInfo.szCurrentDir);
945	pJob->rc = -1;
946	DosClose(hPipeR);
947	}
948
949
950	/*
951	* Insert result in result queue.
952	*/
953	if (DosRequestMutexSem(hmtxJobQueueFine, SEM_INDEFINITE_WAIT))
954	return;
955	pJob->pNext = NULL;
956	if (!pJob->rc) /* 0 on success. */
957	{
958	if (pJobCompletedLast)
959	pJobCompletedLast->pNext = pJob;
960	else
961	pJobCompleted = pJob;
962	pJobCompletedLast = pJob;
963	}
964	else
965	{
966	if (pJobFailedLast)
967	pJobFailedLast->pNext = pJob;
968	else
969	pJobFailed = pJob;
970	pJobFailedLast = pJob;
971	}
972	cJobsFinished++;
973	DosReleaseMutexSem(hmtxJobQueueFine);
974	/* wake up Wait. */
975	DosPostEventSem(hevJobQueueFine);
976	//printf("debug-%d: fine\n", iWorkerId);
977	}
978	}
979	iWorkerId = iWorkerId;
980	}
981
982
983	/**
984	* Builds the input to DosExecPgm.
985	* Will execute programs directly and command thru the shell.
986	*
987	* @returns pszArg.
988	* @param pszArg Arguments to DosExecPgm.(output)
989	* Assumes that the buffer is large enought.
990	* @param pszzEnv Pointer to environment block.
991	* @param pszCommand Command to execute.
992	* @param pszCurDir From where the command is to executed.
993	* @param pPathCache Used to cache the last path, executable, and the search result.
994	*/
995	char WorkerArguments(char pszArg, const char pszzEnv, const char pszCommand, char *pszCurDir, PPATHCACHE pPathCache)
996	{
997	BOOL fCMD = FALSE;
998	const char *psz;
999	const char *psz2;
1000	char * pszW;
1001	char ch;
1002	int cch;
1003	APIRET rc;
1004
1005	/*
1006	* Check if this is multiple command separated by either &, && or \|.
1007	* Currently ignoring quotes for this test.
1008	*/
1009	if ( strchr(pszCommand, '&')
1010	\|\| strchr(pszCommand, '\|'))
1011	{
1012	strcpy(pszArg, "cmd.exe"); /* doesn't use comspec, just defaults to cmd.exe in all cases. */
1013	fCMD = TRUE;
1014	psz2 = pszCommand; /* start of arguments. */
1015	}
1016	else
1017	{
1018	char chEnd = ' ';
1019
1020	/*
1021	* Parse out the first name.
1022	*/
1023	for (psz = pszCommand; psz == '\t' \|\| psz == ' ';) //strip(,'L');
1024	psz++;
1025	if (psz == '"' \|\| psz == '\'')
1026	chEnd = *psz++;
1027	psz2 = psz;
1028	if (chEnd == ' ')
1029	{
1030	while ((ch = *psz) != '\0' && ch != ' ' && ch != '\t')
1031	psz++;
1032	}
1033	else
1034	{
1035	while ((ch = *psz) != '\0' && ch != chEnd)
1036	psz++;
1037	}
1038	*pszArg = '\0';
1039	strncat(pszArg, psz2, psz - psz2);
1040	psz2 = psz+1; /* start of arguments. */
1041	}
1042
1043
1044	/*
1045	* Resolve the executable name if not qualified.
1046	* NB! We doesn't fully support references to other driveletters yet. (TODO/BUGBUG)
1047	*/
1048	/* correct slashes */
1049	pszW = pszArg;
1050	while ((pszW = strchr(pszW, '//')) != NULL)
1051	*pszW++ = '\\';
1052
1053	/* make sure it ends with .exe */
1054	pszW = pszArg + strlen(pszArg) - 1;
1055	while (pszW > pszArg && pszW != '.' && pszW != '\\')
1056	pszW--;
1057	if (*pszW != '.')
1058	strcat(pszArg, ".exe");
1059
1060	if (pszArg[1] != ':' \|\| pszArg == pszCurDir)
1061	{
1062	rc = -1; /* indicate that we've not found the file. */
1063
1064	/* relative path? - expand it */
1065	if (strchr(pszArg, '\\') \|\| pszArg[1] == ':')
1066	{ /* relative path - expand it and check for file existence */
1067	fileNormalize(pszArg, pszCurDir);
1068	rc = fileExist(pszArg);
1069	}
1070	else
1071	{ /* Search path. */
1072	const char *pszPath = pszzEnv;
1073	while (*pszPath != '\0' && strncmp(pszPath, "PATH=", 5))
1074	pszPath += strlen(pszPath) + 1;
1075
1076	if (pszPath && *pszPath != '\0')
1077	{
1078	/* check cache */
1079	if ( !strcmp(pPathCache->szProgram, pszArg)
1080	&& !strcmp(pPathCache->szPath, pszPath)
1081	&& !strcmp(pPathCache->szCurDir, pszCurDir)
1082	)
1083	{
1084	strcpy(pszArg, pPathCache->szResult);
1085	rc = fileExist(pszArg);
1086	}
1087
1088	if (rc)
1089	{ /* search path */
1090	char szResult[CCHMAXPATH];
1091	rc = DosSearchPath(SEARCH_IGNORENETERRS, pszPath, pszArg, &szResult[0] , sizeof(szResult));
1092	if (!rc)
1093	{
1094	strcpy(pszArg, szResult);
1095
1096	/* update cache */
1097	strcpy(pPathCache->szProgram, pszArg);
1098	strcpy(pPathCache->szPath, pszPath);
1099	strcpy(pPathCache->szCurDir, pszCurDir);
1100	strcpy(pPathCache->szResult, szResult);
1101	}
1102	}
1103	}
1104	}
1105	}
1106	/* else nothing to do - assume full path (btw. we don't have the current dir for other drives anyway :-) */
1107	else
1108	rc = !fCMD ? fileExist(pszArg) : NO_ERROR;
1109
1110	/* In case of error use CMD */
1111	if (rc && !fCMD)
1112	{
1113	strcpy(pszArg, "cmd.exe"); /* doesn't use comspec, just defaults to cmd.exe in all cases. */
1114	fCMD = TRUE;
1115	psz2 = pszCommand; /* start of arguments. */
1116	}
1117
1118
1119	/*
1120	* Complete the argument string.
1121	* ---
1122	* szArg current holds the command.
1123	* psz2 points to the first parameter. (needs strip(,'L'))
1124	*/
1125	while ((ch = *psz2) != '\0' && (ch == '\t' \|\| ch == ' '))
1126	psz2++;
1127
1128	pszW = pszArg + strlen(pszArg) + 1;
1129	cch = strlen(psz2);
1130	if (!fCMD)
1131	{
1132	memcpy(pszW, psz2, ++cch);
1133	pszW[cch] = '\0';
1134	}
1135	else
1136	{
1137	strcpy(pszW, "/C \"");
1138	pszW += strlen(pszW);
1139	memcpy(pszW, psz2, cch);
1140	memcpy(pszW + cch, "\"\0", 3);
1141	}
1142
1143	return pszArg;
1144	}
1145
1146
1147
1148	/**
1149	* Normalizes the path slashes for the filename. It will partially expand paths too.
1150	* @returns pszFilename
1151	* @param pszFilename Pointer to filename string. Not empty string!
1152	* Much space to play with.
1153	* @remark (From fastdep.)
1154	*/
1155	char fileNormalize(char pszFilename, char *pszCurDir)
1156	{
1157	char * psz;
1158	int aiSlashes[CCHMAXPATH/2];
1159	int cSlashes;
1160	int i;
1161
1162	/*
1163	* Init stuff.
1164	*/
1165	for (i = 1, cSlashes; pszCurDir[i] != '\0'; i++)
1166	{
1167	if (pszCurDir[i] == '/')
1168	pszCurDir[i] = '\\';
1169	if (pszCurDir[i] == '\\')
1170	aiSlashes[cSlashes++] = i;
1171	}
1172	if (pszCurDir[i-1] != '\\')
1173	{
1174	aiSlashes[cSlashes] = i;
1175	pszCurDir[i++] = '\\';
1176	pszCurDir[i] = '\0';
1177	}
1178
1179
1180	/* expand path? */
1181	pszFilename = psz;
1182	if (pszFilename[1] != ':')
1183	{ /* relative path */
1184	int iSlash;
1185	char szFile[CCHMAXPATH];
1186	char * psz = szFile;
1187
1188	strcpy(szFile, pszFilename);
1189	iSlash = *psz == '\\' ? 1 : cSlashes;
1190	while (*psz != '\0')
1191	{
1192	if (*psz == '.' && psz[1] == '.' && psz[2] == '\\')
1193	{ /* up one directory */
1194	if (iSlash > 0)
1195	iSlash--;
1196	psz += 3;
1197	}
1198	else if (*psz == '.' && psz[1] == '\\')
1199	{ /* no change */
1200	psz += 2;
1201	}
1202	else
1203	{ /* completed expantion! */
1204	strncpy(pszFilename, pszCurDir, aiSlashes[iSlash]+1);
1205	strcpy(pszFilename + aiSlashes[iSlash]+1, psz);
1206	break;
1207	}
1208	}
1209	}
1210	/* else: assume full path */
1211
1212	return psz;
1213	}
1214
1215	/**
1216	* Checks if a given file exist.
1217	* @returns 0 if the file exists. (NO_ERROR)
1218	* 2 if the file doesn't exist. (ERROR_FILE_NOT_FOUND)
1219	* @param pszFilename Name of the file to check existance for.
1220	*/
1221	APIRET fileExist(const char *pszFilename)
1222	{
1223	FILESTATUS3 fsts3;
1224	return DosQueryPathInfo(pszFilename, FIL_STANDARD, &fsts3, sizeof(fsts3));
1225	}
1226
1227
1228	/**
1229	* Submits a command to the daemon.
1230	* @returns 0 on success.
1231	* -3 on failure.
1232	* @param rcIgnore Ignores returcodes ranging from 0 to rcIgnore.
1233	*/
1234	int Submit(int rcIgnore)
1235	{
1236	int cch;
1237	int rc;
1238	char * psz;
1239	PPIB ppib;
1240	PTIB ptib;
1241
1242	DosGetInfoBlocks(&ptib, &ppib);
1243	rc = shrmemOpen();
1244	if (rc)
1245	return rc;
1246
1247	/*
1248	* Build message.
1249	*/
1250	pShrMem->enmMsgType = msgSubmit;
1251	pShrMem->u1.Submit.rcIgnore = rcIgnore;
1252	_getcwd(pShrMem->u1.Submit.szCurrentDir, sizeof(pShrMem->u1.Submit.szCurrentDir));
1253
1254	/* command */
1255	psz = ppib->pib_pchcmd;
1256	psz += strlen(psz) + 1 + 7; /* 7 = strlen("submit ")*/
1257	while (psz == ' ' \|\| psz == '\t')
1258	psz++;
1259	if (*psz == '-')
1260	{
1261	while (psz != ' ' && psz != '\t')
1262	psz++;
1263	while (psz == ' ' \|\| psz == '\t')
1264	psz++;
1265	}
1266	cch = strlen(psz) + 1;
1267	if (cch > sizeof(pShrMem->u1.Submit.szCommand))
1268	{
1269	Error("Fatal error: Command too long.\n");
1270	shrmemFree();
1271	return -1;
1272	}
1273	if (psz == '"' && psz[cch-2] == '"') / remove start & end quotes if any */
1274	{
1275	cch--;
1276	psz++;
1277	}
1278	memcpy(&pShrMem->u1.Submit.szCommand[0], psz, cch);
1279
1280	/* environment */
1281	for (cch = 1, psz = ppib->pib_pchenv; *psz != '\0';)
1282	{
1283	int cchVar = strlen(psz) + 1;
1284	cch += cchVar;
1285	psz += cchVar;
1286	}
1287	if ( ppib->pib_pchenv[cch-2] != '\0'
1288	\|\| ppib->pib_pchenv[cch-1] != '\0')
1289	{
1290	Error("internal error\n");
1291	return -1;
1292	}
1293	if (cch > sizeof(pShrMem->u1.Submit.szzEnv))
1294	{
1295	Error("Fatal error: environment is to bit, cchEnv=%d\n", cch);
1296	shrmemFree();
1297	return -ERROR_BAD_ENVIRONMENT;
1298	}
1299	pShrMem->u1.Submit.cchEnv = cch;
1300	memcpy(&pShrMem->u1.Submit.szzEnv[0], ppib->pib_pchenv, cch);
1301
1302
1303	/*
1304	* Send message and get respons.
1305	*/
1306	rc = shrmemSendClient(msgSubmitResponse);
1307	if (rc)
1308	{
1309	shrmemFree();
1310	return rc;
1311	}
1312
1313	rc = !pShrMem->u1.SubmitResponse.fRc;
1314	shrmemFree();
1315	return rc;
1316	}
1317
1318
1319	/**
1320	* Waits for the commands to complete.
1321	* Will write all output from completed command to stdout.
1322	* Will write failing commands last.
1323	* @returns Count of failing commands.
1324	*/
1325	int Wait(void)
1326	{
1327	int rc;
1328
1329	rc = shrmemOpen();
1330	if (rc)
1331	return rc;
1332	do
1333	{
1334	pShrMem->enmMsgType = msgWait;
1335	pShrMem->u1.Wait.iNothing = 0;
1336	rc = shrmemSendClient(msgWaitResponse);
1337	if (rc)
1338	{
1339	shrmemFree();
1340	return -1;
1341	}
1342	printf("%s", pShrMem->u1.WaitResponse.szOutput);
1343	/*
1344	* Release the client mutex if more data and yield the CPU.
1345	* So we can submit more work. (Odin nmake lib...)
1346	*/
1347	if (pShrMem->u1.WaitResponse.fMore)
1348	{
1349	DosReleaseMutexSem(pShrMem->hmtxClient);
1350	DosSleep(0);
1351	rc = DosRequestMutexSem(pShrMem->hmtxClient, SEM_INDEFINITE_WAIT);
1352	if (rc)
1353	{
1354	Error("Fatal error: failed to get client mutex. rc=%d\n", rc);
1355	shrmemFree();
1356	return -1;
1357	}
1358	}
1359	} while (pShrMem->u1.WaitResponse.fMore);
1360
1361	rc = pShrMem->u1.WaitResponse.rc;
1362	shrmemFree();
1363	return rc;
1364	}
1365
1366
1367	/**
1368	* Sends a kill command to the daemon to kill it and its workers.
1369	* @returns 0.
1370	*/
1371	int Kill(void)
1372	{
1373	int rc;
1374
1375	rc = shrmemOpen();
1376	if (rc)
1377	return rc;
1378
1379	pShrMem->enmMsgType = msgKill;
1380	pShrMem->u1.Kill.iNothing = 0;
1381	rc = shrmemSendClient(msgKillResponse);
1382	if (!rc)
1383	rc = !pShrMem->u1.KillResponse.fRc;
1384
1385	shrmemFree();
1386	return rc;
1387	}
1388
1389
1390	/**
1391	* Creates the shared memory area.
1392	* The creator owns the memory when created.
1393	* @returns 0 on success. Error code on error.
1394	*/
1395	int shrmemCreate(void)
1396	{
1397	int rc;
1398	rc = DosAllocSharedMem((PPVOID)(PVOID)&pShrMem,
1399	SHARED_MEM_NAME,
1400	SHARED_MEM_SIZE,
1401	PAG_COMMIT \| PAG_READ \| PAG_WRITE);
1402	if (rc)
1403	{
1404	Error("Fatal error: Failed to create shared memory object. rc=%d\n", rc);
1405	return rc;
1406	}
1407
1408	rc = DosCreateEventSem(NULL, &pShrMem->hevDaemon, DC_SEM_SHARED, FALSE);
1409	if (rc)
1410	{
1411	Error("Fatal error: Failed to create daemon event semaphore. rc=%d\n", rc);
1412	DosFreeMem(pShrMem);
1413	return rc;
1414	}
1415
1416	rc = DosCreateEventSem(NULL, &pShrMem->hevClient, DC_SEM_SHARED, FALSE);
1417	if (rc)
1418	{
1419	Error("Fatal error: Failed to create client event semaphore. rc=%d\n", rc);
1420	DosCloseEventSem(pShrMem->hevDaemon);
1421	DosFreeMem(pShrMem);
1422	return rc;
1423	}
1424
1425	rc = DosCreateMutexSem(NULL, &pShrMem->hmtx, DC_SEM_SHARED, TRUE);
1426	if (rc)
1427	{
1428	Error("Fatal error: Failed to create mutex semaphore. rc=%d\n", rc);
1429	DosCloseEventSem(pShrMem->hevClient);
1430	DosCloseEventSem(pShrMem->hevDaemon);
1431	DosFreeMem(pShrMem);
1432	return rc;
1433	}
1434
1435	rc = DosCreateMutexSem(NULL, &pShrMem->hmtxClient, DC_SEM_SHARED, FALSE);
1436	if (rc)
1437	{
1438	Error("Fatal error: Failed to create client mutex semaphore. rc=%d\n", rc);
1439	DosCloseEventSem(pShrMem->hevClient);
1440	DosCloseEventSem(pShrMem->hevClient);
1441	DosCloseEventSem(pShrMem->hevDaemon);
1442	DosFreeMem(pShrMem);
1443	return rc;
1444	}
1445
1446
1447	/*
1448	* Install signal handlers.
1449	*/
1450	signal(SIGSEGV, signalhandlerDaemon);
1451	signal(SIGTERM, signalhandlerDaemon);
1452	signal(SIGABRT, signalhandlerDaemon);
1453	signal(SIGINT, signalhandlerDaemon);
1454	signal(SIGBREAK,signalhandlerDaemon);
1455
1456	return rc;
1457	}
1458
1459
1460	/**
1461	* Opens the shared memory and the semaphores.
1462	* The caller is owner of the memory upon successful return.
1463	* @returns 0 on success. Error code on error.
1464	*/
1465	int shrmemOpen(void)
1466	{
1467	int rc;
1468
1469	rc = DosGetNamedSharedMem((PPVOID)(PVOID)&pShrMem,
1470	SHARED_MEM_NAME,
1471	PAG_READ \| PAG_WRITE);
1472	if (rc)
1473	{
1474	Error("Fatal error: Failed to open shared memory. rc=%d\n");
1475	return rc;
1476	}
1477
1478	rc = DosOpenEventSem(NULL, &pShrMem->hevClient);
1479	if (rc)
1480	{
1481	Error("Fatal error: Failed to open client event semaphore. rc=%d\n");
1482	DosFreeMem(pShrMem);
1483	return rc;
1484	}
1485
1486	rc = DosOpenEventSem(NULL, &pShrMem->hevDaemon);
1487	if (rc)
1488	{
1489	Error("Fatal error: Failed to open daemon event semaphore. rc=%d\n");
1490	DosCloseEventSem(pShrMem->hevClient);
1491	DosFreeMem(pShrMem);
1492	return rc;
1493	}
1494
1495	rc = DosOpenMutexSem(NULL, &pShrMem->hmtx);
1496	if (rc)
1497	{
1498	Error("Fatal error: Failed to open mutex semaphore. rc=%d\n");
1499	DosCloseEventSem(pShrMem->hevClient);
1500	DosCloseEventSem(pShrMem->hevDaemon);
1501	DosFreeMem(pShrMem);
1502	return rc;
1503	}
1504
1505	rc = DosOpenMutexSem(NULL, &pShrMem->hmtxClient);
1506	if (rc)
1507	{
1508	Error("Fatal error: Failed to open client mutex semaphore. rc=%d\n");
1509	DosCloseEventSem(pShrMem->hevClient);
1510	DosCloseEventSem(pShrMem->hevDaemon);
1511	DosCloseMutexSem(pShrMem->hmtx);
1512	DosFreeMem(pShrMem);
1513	return rc;
1514	}
1515
1516	rc = DosRequestMutexSem(pShrMem->hmtxClient, SEM_INDEFINITE_WAIT);
1517	if (rc)
1518	{
1519	Error("Fatal error: Failed to open take ownership of client mutex semaphore. rc=%d\n");
1520	shrmemFree();
1521	return rc;
1522	}
1523
1524	rc = DosRequestMutexSem(pShrMem->hmtx, SEM_INDEFINITE_WAIT);
1525	if (rc)
1526	{
1527	Error("Fatal error: Failed to open take ownership of mutex semaphore. rc=%d\n");
1528	shrmemFree();
1529	return rc;
1530	}
1531
1532
1533	/*
1534	* Install signal handlers.
1535	*/
1536	signal(SIGSEGV, signalhandlerClient);
1537	signal(SIGTERM, signalhandlerClient);
1538	signal(SIGABRT, signalhandlerClient);
1539	signal(SIGINT, signalhandlerClient);
1540	signal(SIGBREAK,signalhandlerClient);
1541
1542	return rc;
1543	}
1544
1545
1546	/**
1547	* Frees the shared memory and the associated semaphores.
1548	*/
1549	void shrmemFree(void)
1550	{
1551	if (!pShrMem)
1552	return;
1553	/* wakeup any clients */
1554	DosPostEventSem(pShrMem->hevClient);
1555	/* free stuff */
1556	DosReleaseMutexSem(pShrMem->hmtxClient);
1557	DosReleaseMutexSem(pShrMem->hmtx);
1558	DosCloseMutexSem(pShrMem->hmtxClient);
1559	DosCloseMutexSem(pShrMem->hmtx);
1560	DosCloseEventSem(pShrMem->hevClient);
1561	DosCloseEventSem(pShrMem->hevDaemon);
1562	DosFreeMem(pShrMem);
1563	pShrMem = NULL;
1564	}
1565
1566
1567	/**
1568	* Daemon sends a message.
1569	* Upon we don't own the shared memory any longer.
1570	* @returns 0 on success. Error code on error.
1571	* -1 on timeout.
1572	* @param fWait Wait for new message.
1573	*/
1574	int shrmemSendDaemon(BOOL fWait)
1575	{
1576	ULONG ulDummy;
1577	int rc;
1578
1579	/* send message */
1580	DosResetEventSem(pShrMem->hevDaemon, &ulDummy);
1581	rc = DosReleaseMutexSem(pShrMem->hmtx);
1582	if (!rc)
1583	rc = DosPostEventSem(pShrMem->hevClient);
1584
1585	/* wait for next message */
1586	if (!rc && fWait)
1587	{
1588	do
1589	{
1590	rc = DosWaitEventSem(pShrMem->hevDaemon, IDLE_TIMEOUT_MS);
1591	} while (rc == ERROR_TIMEOUT && pJobQueue);
1592
1593	if (rc == ERROR_TIMEOUT)
1594	{
1595	DosRequestMutexSem(pShrMem->hmtx, SEM_INDEFINITE_WAIT);
1596	shrmemFree();
1597	return -1;
1598	}
1599
1600	if (!rc)
1601	{
1602	rc = DosRequestMutexSem(pShrMem->hmtx, SEM_INDEFINITE_WAIT);
1603	if (rc == ERROR_SEM_OWNER_DIED)
1604	{
1605	DosCloseMutexSem(pShrMem->hmtx);
1606	pShrMem->hmtx = NULLHANDLE;
1607	rc = DosCreateMutexSem(NULL, &pShrMem->hmtx, DC_SEM_SHARED, TRUE);
1608	}
1609	}
1610
1611	if (rc && rc != ERROR_INTERRUPT)
1612	Error("Internal error: failed to get next message from daemon, rc=%d\n", rc);
1613	}
1614	else
1615	Error("Internal error: failed to send message from daemon, rc=%d\n", rc);
1616	return rc;
1617	}
1618
1619
1620	/**
1621	* Client sends a message.
1622	* Upon we don't own the shared memory any longer.
1623	* @returns 0 on success. Error code on error.
1624	* @param enmMsgTypeResponse The expected response on this message.
1625	*/
1626	int shrmemSendClient(int enmMsgTypeResponse)
1627	{
1628	ULONG ulDummy;
1629	int rc;
1630
1631	/* send message */
1632	DosResetEventSem(pShrMem->hevClient, &ulDummy);
1633	rc = DosReleaseMutexSem(pShrMem->hmtx);
1634	if (!rc)
1635	rc = DosPostEventSem(pShrMem->hevDaemon);
1636
1637	/* wait for response */
1638	if (!rc)
1639	{
1640	rc = DosWaitEventSem(pShrMem->hevClient, SEM_INDEFINITE_WAIT);
1641	if (!rc)
1642	{
1643	rc = DosRequestMutexSem(pShrMem->hmtx, SEM_INDEFINITE_WAIT);
1644	if (rc == ERROR_SEM_OWNER_DIED)
1645	{
1646	Error("Internal error: shared mem mutex owner died.\n");
1647	return -1;
1648	}
1649
1650	if (!rc && pShrMem->enmMsgType != enmMsgTypeResponse)
1651	{
1652	if (pShrMem->enmMsgType != msgDying)
1653	Error("Internal error: Invalid response message. response=%d expected=%d\n",
1654	pShrMem->enmMsgType, enmMsgTypeResponse);
1655	else
1656	Error("Fatal error: daemon just died!\n");
1657	return -1;
1658	}
1659	}
1660	if (rc && rc != ERROR_INTERRUPT)
1661	Error("Internal error: failed to get response message from daemon, rc=%d\n", rc);
1662	}
1663	else
1664	Error("Internal error: failed to send message to daemon, rc=%d\n", rc);
1665
1666	return rc;
1667	}
1668
1669
1670	/**
1671	* printf lookalike used to print all run-tim errors.
1672	* @param pszFormat Format string.
1673	* @param ... Arguments (optional).
1674	*/
1675	void Error(const char *pszFormat, ...)
1676	{
1677	va_list arg;
1678
1679	va_start(arg, pszFormat);
1680	vfprintf(stdout, pszFormat, arg);
1681	va_end(arg);
1682	}
1683
1684
1685	#ifdef DEBUGMEMORY
1686	void my_free(void *pv)
1687	{
1688	DosFreeMem((PVOID)((unsigned)pv & 0xffff0000));
1689	}
1690
1691	void *my_malloc(size_t cb)
1692	{
1693	APIRET rc;
1694	PVOID pv;
1695	ULONG cbAlloc;
1696	char szMsg[200];
1697
1698	cbAlloc = (cb + 0x1fff) & (~0x0fff);
1699
1700	rc = DosAllocMem(&pv, cbAlloc, PAG_READ \| PAG_WRITE);
1701	if (!rc)
1702	{
1703	rc = DosSetMem(pv, cbAlloc - 0x1000, PAG_READ \| PAG_WRITE \| PAG_COMMIT);
1704	if (rc)
1705	__interrupt(3);
1706	if (cb & 0xfff)
1707	pv = (PVOID)((unsigned)pv + 0x1000 - (cb & 0x0fff));
1708	}
1709
1710	strcpy(szMsg, "malloc(");
1711	_itoa(cb, szMsg + strlen(szMsg), 16);
1712	strcat(szMsg, ") -> ");
1713	_itoa(pv, szMsg + strlen(szMsg), 16);
1714	strcat(szMsg, "\r\n");
1715
1716	DosPutMessage(1, strlen(szMsg), szMsg);
1717
1718	return rc ? NULL : pv;
1719	}
1720	#endif

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