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Commitcaa1054

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In pg_upgrade, use the new postmaster -C option to get the real data
directory, for config-only directory installs. Only works for PG 9.2+servers.
1 parenta399675 commitcaa1054

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4 files changed

+70
-5
lines changed

4 files changed

+70
-5
lines changed

‎contrib/pg_upgrade/option.c‎

Lines changed: 60 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -112,10 +112,12 @@ parseCommandLine(int argc, char *argv[])
112112

113113
case'd':
114114
old_cluster.pgdata=pg_strdup(optarg);
115+
old_cluster.pgconfig=pg_strdup(optarg);
115116
break;
116117

117118
case'D':
118119
new_cluster.pgdata=pg_strdup(optarg);
120+
new_cluster.pgconfig=pg_strdup(optarg);
119121
break;
120122

121123
case'g':
@@ -319,3 +321,61 @@ check_required_directory(char **dirpath, char *envVarName,
319321
#endif
320322
(*dirpath)[strlen(*dirpath)-1]=0;
321323
}
324+
325+
/*
326+
* adjust_data_dir
327+
*
328+
* If a configuration-only directory was specified, find the real data dir
329+
* by quering the running server. This has limited checking because we
330+
* can't check for a running server because we can't find postmaster.pid.
331+
*/
332+
void
333+
adjust_data_dir(ClusterInfo*cluster)
334+
{
335+
charfilename[MAXPGPATH];
336+
charcmd[MAXPGPATH],cmd_output[MAX_STRING];
337+
FILE*fd,*output;
338+
339+
/* If there is no postgresql.conf, it can't be a config-only dir */
340+
snprintf(filename,sizeof(filename),"%s/postgresql.conf",cluster->pgconfig);
341+
if ((fd=fopen(filename,"r"))==NULL)
342+
return;
343+
fclose(fd);
344+
345+
/* If PG_VERSION exists, it can't be a config-only dir */
346+
snprintf(filename,sizeof(filename),"%s/PG_VERSION",cluster->pgconfig);
347+
if ((fd=fopen(filename,"r"))!=NULL)
348+
{
349+
fclose(fd);
350+
return;
351+
}
352+
353+
/* Must be a configuration directory, so find the real data directory. */
354+
355+
prep_status("Finding the real data directory for the %s cluster",
356+
CLUSTER_NAME(cluster));
357+
358+
/*
359+
* We don't have a data directory yet, so we can't check the PG
360+
* version, so this might fail --- only works for PG 9.2+. If this
361+
* fails, pg_upgrade will fail anyway because the data files will not
362+
* be found.
363+
*/
364+
snprintf(cmd,sizeof(cmd),"\"%s/postmaster\" -D \"%s\" -C data_directory",
365+
cluster->bindir,cluster->pgconfig);
366+
367+
if ((output=popen(cmd,"r"))==NULL||
368+
fgets(cmd_output,sizeof(cmd_output),output)==NULL)
369+
pg_log(PG_FATAL,"Could not get data directory using %s: %s\n",
370+
cmd,getErrorText(errno));
371+
372+
pclose(output);
373+
374+
/* Remove trailing newline */
375+
if (strchr(cmd_output,'\n')!=NULL)
376+
*strchr(cmd_output,'\n')='\0';
377+
378+
cluster->pgdata=pg_strdup(cmd_output);
379+
380+
check_ok();
381+
}

‎contrib/pg_upgrade/pg_upgrade.c‎

Lines changed: 3 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -68,6 +68,9 @@ main(int argc, char **argv)
6868

6969
parseCommandLine(argc,argv);
7070

71+
adjust_data_dir(&old_cluster);
72+
adjust_data_dir(&new_cluster);
73+
7174
output_check_banner(&live_check);
7275

7376
setup(argv[0],live_check);

‎contrib/pg_upgrade/pg_upgrade.h‎

Lines changed: 2 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -187,6 +187,7 @@ typedef struct
187187
ControlDatacontroldata;/* pg_control information */
188188
DbInfoArrdbarr;/* dbinfos array */
189189
char*pgdata;/* pathname for cluster's $PGDATA directory */
190+
char*pgconfig;/* pathname for cluster's config file directory */
190191
char*bindir;/* pathname for cluster's executable directory */
191192
unsigned shortport;/* port number where postmaster is waiting */
192193
uint32major_version;/* PG_VERSION of cluster */
@@ -361,6 +362,7 @@ void print_maps(FileNameMap *maps, int n,
361362
/* option.c */
362363

363364
voidparseCommandLine(intargc,char*argv[]);
365+
voidadjust_data_dir(ClusterInfo*cluster);
364366

365367
/* relfilenode.c */
366368

‎contrib/pg_upgrade/server.c‎

Lines changed: 5 additions & 5 deletions
Original file line numberDiff line numberDiff line change
@@ -169,7 +169,7 @@ start_postmaster(ClusterInfo *cluster)
169169
snprintf(cmd,sizeof(cmd),
170170
SYSTEMQUOTE"\"%s/pg_ctl\" -w -l \"%s\" -D \"%s\" "
171171
"-o \"-p %d %s\" start >> \"%s\" 2>&1"SYSTEMQUOTE,
172-
cluster->bindir,log_opts.filename2,cluster->pgdata,cluster->port,
172+
cluster->bindir,log_opts.filename2,cluster->pgconfig,cluster->port,
173173
(cluster->controldata.cat_ver >=
174174
BINARY_UPGRADE_SERVER_FLAG_CAT_VER) ?"-b" :
175175
"-c autovacuum=off -c autovacuum_freeze_max_age=2000000000",
@@ -208,25 +208,25 @@ stop_postmaster(bool fast)
208208
{
209209
charcmd[MAXPGPATH];
210210
constchar*bindir;
211-
constchar*datadir;
211+
constchar*configdir;
212212

213213
if (os_info.running_cluster==&old_cluster)
214214
{
215215
bindir=old_cluster.bindir;
216-
datadir=old_cluster.pgdata;
216+
configdir=old_cluster.pgconfig;
217217
}
218218
elseif (os_info.running_cluster==&new_cluster)
219219
{
220220
bindir=new_cluster.bindir;
221-
datadir=new_cluster.pgdata;
221+
configdir=new_cluster.pgconfig;
222222
}
223223
else
224224
return;/* no cluster running */
225225

226226
snprintf(cmd,sizeof(cmd),
227227
SYSTEMQUOTE"\"%s/pg_ctl\" -w -l \"%s\" -D \"%s\" %s stop >> "
228228
"\"%s\" 2>&1"SYSTEMQUOTE,
229-
bindir,log_opts.filename2,datadir,fast ?"-m fast" :"",
229+
bindir,log_opts.filename2,configdir,fast ?"-m fast" :"",
230230
log_opts.filename2);
231231

232232
exec_prog(fast ? false : true,"%s",cmd);

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