database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-07-28 23:42:10 +03:00
Code Activity

In pg_upgrade, use the new postmaster -C option to get the real data

Browse Source 
directory, for config-only directory installs.  Only works for PG 9.2+
servers.
This commit is contained in:
Bruce Momjian
2011-10-07 14:40:23 -04:00
parent a3996754cc
commit caa1054df8
4 changed files with 70 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files

60
contrib/pg_upgrade/option.c
View File

@ -112,10 +112,12 @@ parseCommandLine(int argc, char *argv[])
case 'd':
old_cluster.pgdata = pg_strdup(optarg);
old_cluster.pgconfig = pg_strdup(optarg);
break;
case 'D':
new_cluster.pgdata = pg_strdup(optarg);
new_cluster.pgconfig = pg_strdup(optarg);
break;
case 'g':
@ -319,3 +321,61 @@ check_required_directory(char **dirpath, char *envVarName,
#endif
(*dirpath)[strlen(*dirpath) - 1] = 0;
}
/*
* adjust_data_dir
*
* If a configuration-only directory was specified, find the real data dir
* by quering the running server. This has limited checking because we
* can't check for a running server because we can't find postmaster.pid.
*/
void
adjust_data_dir(ClusterInfo *cluster)
{
char filename[MAXPGPATH];
char cmd[MAXPGPATH], cmd_output[MAX_STRING];
FILE *fd, *output;
/* If there is no postgresql.conf, it can't be a config-only dir */
snprintf(filename, sizeof(filename), "%s/postgresql.conf", cluster->pgconfig);
if ((fd = fopen(filename, "r")) == NULL)
return;
fclose(fd);
/* If PG_VERSION exists, it can't be a config-only dir */
snprintf(filename, sizeof(filename), "%s/PG_VERSION", cluster->pgconfig);
if ((fd = fopen(filename, "r")) != NULL)
{
fclose(fd);
return;
}
/* Must be a configuration directory, so find the real data directory. */
prep_status("Finding the real data directory for the %s cluster",
CLUSTER_NAME(cluster));
/*
* We don't have a data directory yet, so we can't check the PG
* version, so this might fail --- only works for PG 9.2+. If this
* fails, pg_upgrade will fail anyway because the data files will not
* be found.
*/
snprintf(cmd, sizeof(cmd), "\"%s/postmaster\" -D \"%s\" -C data_directory",
cluster->bindir, cluster->pgconfig);
if ((output = popen(cmd, "r")) == NULL ||
fgets(cmd_output, sizeof(cmd_output), output) == NULL)
pg_log(PG_FATAL, "Could not get data directory using %s: %s\n",
cmd, getErrorText(errno));
pclose(output);
/* Remove trailing newline */
if (strchr(cmd_output, '\n') != NULL)
*strchr(cmd_output, '\n') = '\0';
cluster->pgdata = pg_strdup(cmd_output);
check_ok();
}