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pg_upgrade: Use new routine to retrieve data of PG_VERSION

Browse Source 
Unsurprisingly, this shaves code.  get_major_server_version() can be
replaced by the new routine added by cd0be131ba, with the contents of
PG_VERSION stored in an allocated buffer instead of a fixed-sized one.

Author: Michael Paquier <michael@paquier.xyz>
Reviewed-by: Masahiko Sawada <sawada.mshk@gmail.com>
Discussion: https://postgr.es/m/aOiirvWJzwdVCXph@paquier.xyz
This commit is contained in:
Michael Paquier
2025-10-14 16:27:13 +09:00
parent cd0be131ba
commit a7d8052910
3 changed files with 4 additions and 43 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
src/bin/pg_upgrade/exec.c
View File

@@ -12,6 +12,7 @@
#include <fcntl.h>
#include "common/string.h"
#include "fe_utils/version.h"
#include "pg_upgrade.h"
static void check_data_dir(ClusterInfo *cluster);
@@ -343,8 +344,8 @@ check_data_dir(ClusterInfo *cluster)
const char *pg_data = cluster->pgdata;
/* get the cluster version */
cluster->major_version = get_major_server_version(cluster);
cluster->major_version = get_pg_version(cluster->pgdata,
&cluster->major_version_str);
check_single_dir(pg_data, "");
check_single_dir(pg_data, "base");
check_single_dir(pg_data, "global");

3
src/bin/pg_upgrade/pg_upgrade.h
View File

@@ -298,7 +298,7 @@ typedef struct
char *sockdir; /* directory for Unix Domain socket, if any */
unsigned short port; /* port number where postmaster is waiting */
uint32 major_version; /* PG_VERSION of cluster */
char major_version_str[64]; /* string PG_VERSION of cluster */
char *major_version_str; /* string PG_VERSION of cluster */
uint32 bin_version; /* version returned from pg_ctl */
char **tablespaces; /* tablespace directories */
int num_tablespaces;
@@ -473,7 +473,6 @@ char *cluster_conn_opts(ClusterInfo *cluster);
bool start_postmaster(ClusterInfo *cluster, bool report_and_exit_on_error);
void stop_postmaster(bool in_atexit);
uint32 get_major_server_version(ClusterInfo *cluster);
void check_pghost_envvar(void);

39
src/bin/pg_upgrade/server.c
View File

@@ -148,45 +148,6 @@ executeQueryOrDie(PGconn *conn, const char *fmt,...)
}
/*
* get_major_server_version()
*
* gets the version (in unsigned int form) for the given datadir. Assumes
* that datadir is an absolute path to a valid pgdata directory. The version
* is retrieved by reading the PG_VERSION file.
*/
uint32
get_major_server_version(ClusterInfo *cluster)
{
FILE *version_fd;
char ver_filename[MAXPGPATH];
int v1 = 0,
v2 = 0;
snprintf(ver_filename, sizeof(ver_filename), "%s/PG_VERSION",
cluster->pgdata);
if ((version_fd = fopen(ver_filename, "r")) == NULL)
pg_fatal("could not open version file \"%s\": %m", ver_filename);
if (fscanf(version_fd, "%63s", cluster->major_version_str) == 0 ||
sscanf(cluster->major_version_str, "%d.%d", &v1, &v2) < 1)
pg_fatal("could not parse version file \"%s\"", ver_filename);
fclose(version_fd);
if (v1 < 10)
{
/* old style, e.g. 9.6.1 */
return v1 * 10000 + v2 * 100;
}
else
{
/* new style, e.g. 10.1 */
return v1 * 10000;
}
}
static void
stop_postmaster_atexit(void)
{