v4-0009-cleanup-avoid-local-variables-shadowed-by-globals.patch

From 1a8ebf5384398a32ee3c7a67f48ffc2fa21454e8 Mon Sep 17 00:00:00 2001
From: "Chao Li (Evan)" <lic@highgo.com>
Date: Tue, 2 Dec 2025 15:05:05 +0800
Subject: [PATCH v4 09/13] cleanup: avoid local variables shadowed by globals
 across several files

This commit fixes multiple instances where local variables used the same
names as global identifiers in various modules. The affected locals are
renamed so they are no longer shadowed by the globals and remain clear
within their respective scopes.

Author: Chao Li <lic@highgo.com>
Discussion: https://postgr.es/m/CAEoWx2kQ2x5gMaj8tHLJ3=jfC+p5YXHkJyHrDTiQw2nn2FJTmQ@mail.gmail.com
---
 src/backend/libpq/be-secure-common.c     | 12 ++++-----
 src/common/controldata_utils.c           |  8 +++---
 src/interfaces/ecpg/preproc/descriptor.c | 34 ++++++++++++------------
 3 files changed, 27 insertions(+), 27 deletions(-)

diff --git a/src/backend/libpq/be-secure-common.c b/src/backend/libpq/be-secure-common.c
index e8b837d1fa7..8b674435bd2 100644
--- a/src/backend/libpq/be-secure-common.c
+++ b/src/backend/libpq/be-secure-common.c
@@ -111,17 +111,17 @@ error:
  * Check permissions for SSL key files.
  */
 bool
-check_ssl_key_file_permissions(const char *ssl_key_file, bool isServerStart)
+check_ssl_key_file_permissions(const char *sslKeyFile, bool isServerStart)
 {
 	int			loglevel = isServerStart ? FATAL : LOG;
 	struct stat buf;
 
-	if (stat(ssl_key_file, &buf) != 0)
+	if (stat(sslKeyFile, &buf) != 0)
 	{
 		ereport(loglevel,
 				(errcode_for_file_access(),
 				 errmsg("could not access private key file \"%s\": %m",
-						ssl_key_file)));
+						sslKeyFile)));
 		return false;
 	}
 
@@ -131,7 +131,7 @@ check_ssl_key_file_permissions(const char *ssl_key_file, bool isServerStart)
 		ereport(loglevel,
 				(errcode(ERRCODE_CONFIG_FILE_ERROR),
 				 errmsg("private key file \"%s\" is not a regular file",
-						ssl_key_file)));
+						sslKeyFile)));
 		return false;
 	}
 
@@ -157,7 +157,7 @@ check_ssl_key_file_permissions(const char *ssl_key_file, bool isServerStart)
 		ereport(loglevel,
 				(errcode(ERRCODE_CONFIG_FILE_ERROR),
 				 errmsg("private key file \"%s\" must be owned by the database user or root",
-						ssl_key_file)));
+						sslKeyFile)));
 		return false;
 	}
 
@@ -167,7 +167,7 @@ check_ssl_key_file_permissions(const char *ssl_key_file, bool isServerStart)
 		ereport(loglevel,
 				(errcode(ERRCODE_CONFIG_FILE_ERROR),
 				 errmsg("private key file \"%s\" has group or world access",
-						ssl_key_file),
+						sslKeyFile),
 				 errdetail("File must have permissions u=rw (0600) or less if owned by the database user, or permissions u=rw,g=r (0640) or less if owned by root.")));
 		return false;
 	}
diff --git a/src/common/controldata_utils.c b/src/common/controldata_utils.c
index fa375dc9129..78464e8237f 100644
--- a/src/common/controldata_utils.c
+++ b/src/common/controldata_utils.c
@@ -49,11 +49,11 @@
  * file data is correct.
  */
 ControlFileData *
-get_controlfile(const char *DataDir, bool *crc_ok_p)
+get_controlfile(const char *data_dir, bool *crc_ok_p)
 {
 	char		ControlFilePath[MAXPGPATH];
 
-	snprintf(ControlFilePath, MAXPGPATH, "%s/%s", DataDir, XLOG_CONTROL_FILE);
+	snprintf(ControlFilePath, MAXPGPATH, "%s/%s", data_dir, XLOG_CONTROL_FILE);
 
 	return get_controlfile_by_exact_path(ControlFilePath, crc_ok_p);
 }
@@ -186,7 +186,7 @@ retry:
  * routine in the backend.
  */
 void
-update_controlfile(const char *DataDir,
+update_controlfile(const char *data_dir,
 				   ControlFileData *ControlFile, bool do_sync)
 {
 	int			fd;
@@ -211,7 +211,7 @@ update_controlfile(const char *DataDir,
 	memset(buffer, 0, PG_CONTROL_FILE_SIZE);
 	memcpy(buffer, ControlFile, sizeof(ControlFileData));
 
-	snprintf(ControlFilePath, sizeof(ControlFilePath), "%s/%s", DataDir, XLOG_CONTROL_FILE);
+	snprintf(ControlFilePath, sizeof(ControlFilePath), "%s/%s", data_dir, XLOG_CONTROL_FILE);
 
 #ifndef FRONTEND
 
diff --git a/src/interfaces/ecpg/preproc/descriptor.c b/src/interfaces/ecpg/preproc/descriptor.c
index e8c7016bdc1..9dac761e393 100644
--- a/src/interfaces/ecpg/preproc/descriptor.c
+++ b/src/interfaces/ecpg/preproc/descriptor.c
@@ -72,7 +72,7 @@ ECPGnumeric_lvalue(char *name)
 static struct descriptor *descriptors;
 
 void
-add_descriptor(const char *name, const char *connection)
+add_descriptor(const char *name, const char *conn_str)
 {
 	struct descriptor *new;
 
@@ -83,15 +83,15 @@ add_descriptor(const char *name, const char *connection)
 
 	new->next = descriptors;
 	new->name = mm_strdup(name);
-	if (connection)
-		new->connection = mm_strdup(connection);
+	if (conn_str)
+		new->connection = mm_strdup(conn_str);
 	else
 		new->connection = NULL;
 	descriptors = new;
 }
 
 void
-drop_descriptor(const char *name, const char *connection)
+drop_descriptor(const char *name, const char *conn_str)
 {
 	struct descriptor *i;
 	struct descriptor **lastptr = &descriptors;
@@ -103,9 +103,9 @@ drop_descriptor(const char *name, const char *connection)
 	{
 		if (strcmp(name, i->name) == 0)
 		{
-			if ((!connection && !i->connection)
-				|| (connection && i->connection
-					&& strcmp(connection, i->connection) == 0))
+			if ((!conn_str && !i->connection)
+				|| (conn_str && i->connection
+					&& strcmp(conn_str, i->connection) == 0))
 			{
 				*lastptr = i->next;
 				free(i->connection);
@@ -115,14 +115,14 @@ drop_descriptor(const char *name, const char *connection)
 			}
 		}
 	}
-	if (connection)
-		mmerror(PARSE_ERROR, ET_WARNING, "descriptor %s bound to connection %s does not exist", name, connection);
+	if (conn_str)
+		mmerror(PARSE_ERROR, ET_WARNING, "descriptor %s bound to connection %s does not exist", name, conn_str);
 	else
 		mmerror(PARSE_ERROR, ET_WARNING, "descriptor %s bound to the default connection does not exist", name);
 }
 
 struct descriptor *
-lookup_descriptor(const char *name, const char *connection)
+lookup_descriptor(const char *name, const char *conn_str)
 {
 	struct descriptor *i;
 
@@ -133,20 +133,20 @@ lookup_descriptor(const char *name, const char *connection)
 	{
 		if (strcmp(name, i->name) == 0)
 		{
-			if ((!connection && !i->connection)
-				|| (connection && i->connection
-					&& strcmp(connection, i->connection) == 0))
+			if ((!conn_str && !i->connection)
+				|| (conn_str && i->connection
+					&& strcmp(conn_str, i->connection) == 0))
 				return i;
-			if (connection && !i->connection)
+			if (conn_str && !i->connection)
 			{
 				/* overwrite descriptor's connection */
-				i->connection = mm_strdup(connection);
+				i->connection = mm_strdup(conn_str);
 				return i;
 			}
 		}
 	}
-	if (connection)
-		mmerror(PARSE_ERROR, ET_WARNING, "descriptor %s bound to connection %s does not exist", name, connection);
+	if (conn_str)
+		mmerror(PARSE_ERROR, ET_WARNING, "descriptor %s bound to connection %s does not exist", name, conn_str);
 	else
 		mmerror(PARSE_ERROR, ET_WARNING, "descriptor %s bound to the default connection does not exist", name);
 	return NULL;
-- 
2.39.5 (Apple Git-154)