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pg_upgrade: conditionally create cluster delete script

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If users create tablespaces inside the old cluster directory, it is
impossible for the delete script to delete _only_ the old cluster files,
so don't create a script in that case, and issue a message to the user.
This commit is contained in:
Bruce Momjian 2013-02-14 10:53:03 -05:00
parent 74205266d4
commit 4765dd7921
1 changed files with 37 additions and 6 deletions
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43
contrib/pg_upgrade/check.c
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@ -246,10 +246,17 @@ output_completion_banner(char *analyze_script_file_name,
"by pg_upgrade so, once you start the new server, consider running:\n"
" %s\n\n", analyze_script_file_name);
pg_log(PG_REPORT,
"Running this script will delete the old cluster's data files:\n"
" %s\n",
deletion_script_file_name);
if (deletion_script_file_name)
pg_log(PG_REPORT,
"Running this script will delete the old cluster's data files:\n"
" %s\n",
deletion_script_file_name);
else
pg_log(PG_REPORT,
"Could not create a script to delete the old cluster's data\n"
"files because user-defined tablespaces exist in the old cluster\n"
"directory. The old cluster's contents must be deleted manually.\n");
}
@ -584,14 +591,38 @@ create_script_for_old_cluster_deletion(char **deletion_script_file_name)
{
FILE *script = NULL;
int tblnum;
char old_cluster_pgdata[MAXPGPATH];
*deletion_script_file_name = pg_malloc(MAXPGPATH);
prep_status("Creating script to delete old cluster");
snprintf(*deletion_script_file_name, MAXPGPATH, "delete_old_cluster.%s",
SCRIPT_EXT);
/*
* Some users (oddly) create tablespaces inside the cluster data
* directory. We can't create a proper old cluster delete script
* in that case.
*/
strlcpy(old_cluster_pgdata, old_cluster.pgdata, MAXPGPATH);
canonicalize_path(old_cluster_pgdata);
for (tblnum = 0; tblnum < os_info.num_old_tablespaces; tblnum++)
{
char old_tablespace_dir[MAXPGPATH];
strlcpy(old_tablespace_dir, os_info.old_tablespaces[tblnum], MAXPGPATH);
canonicalize_path(old_tablespace_dir);
if (path_is_prefix_of_path(old_cluster_pgdata, old_tablespace_dir))
{
/* Unlink file in case it is left over from a previous run. */
unlink(*deletion_script_file_name);
pg_free(*deletion_script_file_name);
*deletion_script_file_name = NULL;
return;
}
}
prep_status("Creating script to delete old cluster");
if ((script = fopen_priv(*deletion_script_file_name, "w")) == NULL)
pg_log(PG_FATAL, "Could not open file \"%s\": %s\n",
*deletion_script_file_name, getErrorText(errno));