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Commitdde36bf

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Create postmaster.pid and postmaster.opts under $PGDATA
1 parent9de156f commitdde36bf

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1 file changed

+172
-3
lines changed

1 file changed

+172
-3
lines changed

‎src/backend/postmaster/postmaster.c‎

Lines changed: 172 additions & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -10,7 +10,7 @@
1010
*
1111
*
1212
* IDENTIFICATION
13-
* $Header: /cvsroot/pgsql/src/backend/postmaster/postmaster.c,v 1.127 1999/10/25 03:07:45 tgl Exp $
13+
* $Header: /cvsroot/pgsql/src/backend/postmaster/postmaster.c,v 1.128 1999/12/03 06:26:34 ishii Exp $
1414
*
1515
* NOTES
1616
*
@@ -92,6 +92,23 @@
9292
#include"utils/trace.h"
9393
#include"version.h"
9494

95+
/*
96+
* "postmaster.pid" is a file containing postmaster's pid, being
97+
* created uder $PGDATA upon postmaster's starting up. When postmaster
98+
* shuts down, it will be unlinked. The purpose of the file includes:
99+
*
100+
* (1) supplying neccessary information to stop/restart postmaster
101+
* (2) preventing another postmaster process starting while it has
102+
* already started
103+
*/
104+
#definePIDFNAME"postmaster.pid"
105+
106+
/*
107+
* "postmaster.opts" is a file containing options for postmaser.
108+
* pg_ctl will use it to restart postmaster.
109+
*/
110+
#defineOPTSFNAME"postmaster.opts"
111+
95112
#if !defined(MAXINT)
96113
#defineMAXINT INT_MAX
97114
#endif
@@ -261,6 +278,15 @@ static void RandomSalt(char *salt);
261278
staticvoidSignalChildren(SIGNAL_ARGS);
262279
staticintCountChildren(void);
263280

281+
staticintSetPidFile(pid_tpid,char*progname,intport,char*datadir,
282+
intassert,intnbuf,char*execfile,
283+
intdebuglvl,intnetserver,
284+
#ifdefUSE_SSL
285+
intsecurenetserver,
286+
#endif
287+
intmaxbackends,intreinit,
288+
intsilent,intsendstop,char*extraoptions);
289+
264290
externintBootstrapMain(intargc,char*argv[]);
265291
staticpid_tSSDataBase(boolstartup);
266292
#defineStartupDataBase()SSDataBase(true)
@@ -272,11 +298,11 @@ static void InitSSL(void);
272298

273299
#ifdefCYR_RECODE
274300
voidGetCharSetByHost(char*,int,char*);
275-
276301
#endif
277302

278303
#ifdefUSE_ASSERT_CHECKING
279-
intassert_enabled=1;
304+
305+
intassert_enabled=1;
280306

281307
#endif
282308

@@ -351,6 +377,9 @@ PostmasterMain(int argc, char *argv[])
351377
boolDataDirOK;/* We have a usable PGDATA value */
352378
charhostbuf[MAXHOSTNAMELEN];
353379
intnonblank_argc;
380+
charoriginal_extraoptions[MAXPGPATH];
381+
382+
*original_extraoptions='\0';
354383

355384
/*
356385
* We need three params so we can display status. If we don't get
@@ -509,6 +538,7 @@ PostmasterMain(int argc, char *argv[])
509538
*/
510539
strcat(ExtraOptions," ");
511540
strcat(ExtraOptions,optarg);
541+
strcpy(original_extraoptions,optarg);
512542
break;
513543
case'p':
514544
/* Set PGPORT by hand. */
@@ -618,6 +648,33 @@ PostmasterMain(int argc, char *argv[])
618648
if (silentflag)
619649
pmdaemonize();
620650

651+
/*
652+
* create pid file. if the file has already existed, exits.
653+
*/
654+
if (SetPidFile(
655+
getpid(),/* postmaster process id */
656+
progname,/* postmaster executable file */
657+
PostPortName,/* port number */
658+
DataDir,/* PGDATA */
659+
assert_enabled,/* whether -A is specified or not */
660+
NBuffers,/* -B: number of shared buffers */
661+
Execfile,/* -b: postgres executable file */
662+
DebugLvl,/* -d: debug level */
663+
NetServer,/* -i: accept connection from INET */
664+
#ifdefUSE_SSL
665+
SecureNetServer,/* -l: use SSL */
666+
#endif
667+
MaxBackends,/* -N: max number of backends */
668+
Reinit,/* -n: reinit shared mem after failure */
669+
silentflag,/* -S: detach tty */
670+
SendStop,/* -s: send SIGSTOP */
671+
original_extraoptions/* options for backend */
672+
)
673+
) {
674+
ExitPostmaster(1);
675+
return0;
676+
}
677+
621678
/*
622679
* Set up signal handlers for the postmaster process.
623680
*/
@@ -2068,3 +2125,115 @@ SSDataBase(bool startup)
20682125

20692126
return(pid);
20702127
}
2128+
2129+
staticcharPidFile[MAXPGPATH];
2130+
2131+
staticvoidUnlinkPidFile(void)
2132+
{
2133+
unlink(PidFile);
2134+
}
2135+
2136+
staticintSetPidFile(pid_tpid,char*progname,intport,char*datadir,
2137+
intassert,intnbuf,char*execfile,
2138+
intdebuglvl,intnetserver,
2139+
#ifdefUSE_SSL
2140+
intsecurenetserver,
2141+
#endif
2142+
intmaxbackends,intreinit,
2143+
intsilent,intsendstop,char*extraoptions)
2144+
{
2145+
intfd;
2146+
charoptsfile[MAXPGPATH];
2147+
charpidstr[32];
2148+
charopts[1024];
2149+
charbuf[1024];
2150+
2151+
/*
2152+
* Creating pid file
2153+
*/
2154+
sprintf(PidFile,"%s/%s",datadir,PIDFNAME);
2155+
fd=open(PidFile,O_RDWR |O_CREAT |O_EXCL,0600);
2156+
if (fd<0) {
2157+
fprintf(stderr,"Can't create pidfile: %s\n",PidFile);
2158+
fprintf(stderr,"Is another postmaser running?\n");
2159+
return(-1);
2160+
}
2161+
sprintf(pidstr,"%d",pid);
2162+
if (write(fd,pidstr,strlen(pidstr))!=strlen(pidstr)) {
2163+
fprintf(stderr,"Write to pid file failed\n");
2164+
close(fd);
2165+
unlink(PidFile);
2166+
return(-1);
2167+
}
2168+
close(fd);
2169+
2170+
/*
2171+
* Creating opts file
2172+
*/
2173+
sprintf(optsfile,"%s/%s",datadir,OPTSFNAME);
2174+
fd=open(optsfile,O_RDWR |O_TRUNC |O_CREAT,0600);
2175+
if (fd<0) {
2176+
fprintf(stderr,"Can't create optsfile:%s",optsfile);
2177+
unlink(PidFile);
2178+
return(-1);
2179+
}
2180+
sprintf(opts,"%s\n-p %d\n-D %s\n",progname,port,datadir);
2181+
if (assert) {
2182+
sprintf(buf,"-A %d\n",assert);
2183+
strcat(opts,buf);
2184+
}
2185+
2186+
sprintf(buf,"-B %d\n-b %s\n",nbuf,execfile);
2187+
strcat(opts,buf);
2188+
2189+
if (debuglvl) {
2190+
sprintf(buf,"-d %d\n",debuglvl);
2191+
strcat(opts,buf);
2192+
}
2193+
2194+
if (netserver) {
2195+
strcat(opts,"-i\n");
2196+
}
2197+
2198+
#ifdefUSE_SSL
2199+
if (securenetserver) {
2200+
strcat(opts,"-l\n");
2201+
}
2202+
#endif
2203+
2204+
sprintf(buf,"-N %d\n",maxbackends);
2205+
strcat(opts,buf);
2206+
2207+
if (!reinit) {
2208+
strcat(opts,"-n\n");
2209+
}
2210+
2211+
if (silent) {
2212+
strcat(opts,"-S\n");
2213+
}
2214+
2215+
if (sendstop) {
2216+
strcat(opts,"-s\n");
2217+
}
2218+
2219+
if (strlen(extraoptions)>0) {
2220+
strcat(opts,"-o '");
2221+
strcat(opts,extraoptions);
2222+
strcat(opts,"'");
2223+
}
2224+
2225+
if (write(fd,opts,strlen(opts))!=strlen(opts)) {
2226+
perror("Writing to opts file failed");
2227+
unlink(PidFile);
2228+
close(fd);
2229+
return(-1);
2230+
}
2231+
close(fd);
2232+
2233+
/*
2234+
* register clean up proc
2235+
*/
2236+
on_proc_exit(UnlinkPidFile,NULL);
2237+
2238+
return(0);
2239+
}

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