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Commitaeddc2a

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committed
Continued rearrangement to permit pgstat + BootstrapMain processes to be
fork/exec'd, in the same mode as the previous patch for backends.Claudio Natoli
1 parent3e32e94 commitaeddc2a

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7 files changed

+345
-159
lines changed

7 files changed

+345
-159
lines changed

‎src/backend/bootstrap/bootstrap.c‎

Lines changed: 18 additions & 24 deletions
Original file line numberDiff line numberDiff line change
@@ -8,7 +8,7 @@
88
* Portions Copyright (c) 1994, Regents of the University of California
99
*
1010
* IDENTIFICATION
11-
* $PostgreSQL: pgsql/src/backend/bootstrap/bootstrap.c,v 1.171 2003/12/20 17:31:21 momjian Exp $
11+
* $PostgreSQL: pgsql/src/backend/bootstrap/bootstrap.c,v 1.172 2003/12/25 03:52:50 momjian Exp $
1212
*
1313
*-------------------------------------------------------------------------
1414
*/
@@ -48,6 +48,11 @@
4848

4949
#defineALLOC(t,c)((t *) calloc((unsigned)(c), sizeof(t)))
5050

51+
#ifdefEXEC_BACKEND
52+
typedefstructPortPort;
53+
externvoidSSDataBaseInit(int);
54+
externvoidread_backend_variables(pid_t,Port*);
55+
#endif
5156

5257
externintInt_yyparse(void);
5358
statichashnode*AddStr(char*str,intstrlength,intmderef);
@@ -238,7 +243,7 @@ BootstrapMain(int argc, char *argv[])
238243
*
239244
* If we are running under the postmaster, this is done already.
240245
*/
241-
if (!IsUnderPostmaster/* when exec|| ExecBackend */)
246+
if (!IsUnderPostmaster||ExecBackend)
242247
MemoryContextInit();
243248

244249
/*
@@ -247,7 +252,7 @@ BootstrapMain(int argc, char *argv[])
247252

248253
/* Set defaults, to be overriden by explicit options below */
249254
dbname=NULL;
250-
if (!IsUnderPostmaster/* when exec || ExecBackend */)
255+
if (!IsUnderPostmaster)
251256
{
252257
InitializeGUCOptions();
253258
potential_DataDir=getenv("PGDATA");/* Null if no PGDATA
@@ -285,24 +290,11 @@ BootstrapMain(int argc, char *argv[])
285290
xlogop=atoi(optarg);
286291
break;
287292
case'p':
288-
{
289-
/* indicates fork from postmaster */
290293
#ifdefEXEC_BACKEND
291-
char*p;
292-
293-
sscanf(optarg,"%lu,%p,",
294-
&UsedShmemSegID,
295-
&UsedShmemSegAddr);
296-
p=strchr(optarg,',');
297-
if (p)
298-
p=strchr(p+1,',');
299-
if (p)
300-
dbname=strdup(p+1);
301-
#else
302-
dbname=strdup(optarg);
294+
IsUnderPostmaster= true;
303295
#endif
296+
dbname=strdup(optarg);
304297
break;
305-
}
306298
case'B':
307299
SetConfigOption("shared_buffers",optarg,PGC_POSTMASTER,PGC_S_ARGV);
308300
break;
@@ -347,12 +339,7 @@ BootstrapMain(int argc, char *argv[])
347339
if (!dbname||argc!=optind)
348340
usage();
349341

350-
#ifdefEXEC_BACKEND
351-
if (IsUnderPostmaster&&MyProc/* ordinary backend */ )
352-
AttachSharedMemoryAndSemaphores();
353-
#endif
354-
355-
if (!IsUnderPostmaster/* when exec || ExecBackend */ )
342+
if (!IsUnderPostmaster||ExecBackend)
356343
{
357344
if (!potential_DataDir)
358345
{
@@ -376,6 +363,9 @@ BootstrapMain(int argc, char *argv[])
376363
{
377364
#ifdefEXEC_BACKEND
378365
read_nondefault_variables();
366+
read_backend_variables(getpid(),NULL);
367+
368+
SSDataBaseInit(xlogop);
379369
#endif
380370
}
381371
else
@@ -427,6 +417,10 @@ BootstrapMain(int argc, char *argv[])
427417
SetProcessingMode(BootstrapProcessing);
428418
IgnoreSystemIndexes(true);
429419

420+
#ifdefEXEC_BACKEND
421+
if (IsUnderPostmaster)
422+
AttachSharedMemoryAndSemaphores();
423+
#endif
430424
XLOGPathInit();
431425

432426
BaseInit();

‎src/backend/main/main.c‎

Lines changed: 27 additions & 4 deletions
Original file line numberDiff line numberDiff line change
@@ -13,7 +13,7 @@
1313
*
1414
*
1515
* IDENTIFICATION
16-
* $PostgreSQL: pgsql/src/backend/main/main.c,v 1.68 2003/12/23 00:34:04 momjian Exp $
16+
* $PostgreSQL: pgsql/src/backend/main/main.c,v 1.69 2003/12/25 03:52:50 momjian Exp $
1717
*
1818
*-------------------------------------------------------------------------
1919
*/
@@ -39,6 +39,7 @@
3939
#include"tcop/tcopprot.h"
4040
#include"utils/help_config.h"
4141
#include"utils/ps_status.h"
42+
#include"pgstat.h"
4243

4344

4445

@@ -202,9 +203,9 @@ main(int argc, char *argv[])
202203

203204
/*
204205
* Now dispatch to one of PostmasterMain, PostgresMain, GucInfoMain,
205-
* or BootstrapMain depending on the program name (and possibly first
206-
* argument) we were called with. The lack of consistency here is
207-
* historical.
206+
*pgstat_main, pgstat_mainChildor BootstrapMain depending on the
207+
*program name (and possibly firstargument) we were called with.
208+
*The lack of consistency here ishistorical.
208209
*/
209210
len=strlen(new_argv[0]);
210211

@@ -221,6 +222,28 @@ main(int argc, char *argv[])
221222
if (argc>1&&strcmp(new_argv[1],"-boot")==0)
222223
exit(BootstrapMain(argc-1,new_argv+1));
223224

225+
#ifdefEXEC_BACKEND
226+
/*
227+
* If the first argument is "-statBuf", then invoke pgstat_main. Note
228+
* we remove "-statBuf" from the arguments passed on to pgstat_main.
229+
*/
230+
if (argc>1&&strcmp(new_argv[1],"-statBuf")==0)
231+
{
232+
pgstat_main(argc-2,new_argv+2);
233+
exit(0);
234+
}
235+
236+
/*
237+
* If the first argument is "-statCol", then invoke pgstat_mainChild. Note
238+
* we remove "-statCol" from the arguments passed on to pgstat_mainChild.
239+
*/
240+
if (argc>1&&strcmp(new_argv[1],"-statCol")==0)
241+
{
242+
pgstat_mainChild(argc-2,new_argv+2);
243+
exit(0);
244+
}
245+
#endif
246+
224247
/*
225248
* If the first argument is "--describe-config", then invoke runtime
226249
* configuration option display mode.

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