Code cleanup. Start removing global variables in pg_probackup.c

Author: alubennikova

src/init.c

@@ -17,34 +17,34 @@
  * Initialize backup catalog.
  */
 int
-do_init(void)
+do_init(char *backup_catalog_path)
 {
 	char		path[MAXPGPATH];
 	char		arclog_path_dir[MAXPGPATH];
 	int			results;
 
-	results = pg_check_dir(backup_path);
+	results = pg_check_dir(backup_catalog_path);
 	if (results == 4)	/* exists and not empty*/
 		elog(ERROR, "backup catalog already exist and it's not empty");
 	else if (results == -1) /*trouble accessing directory*/
 	{
 		int errno_tmp = errno;
 		elog(ERROR, "cannot open backup catalog directory \"%s\": %s",
-			backup_path, strerror(errno_tmp));
+			backup_catalog_path, strerror(errno_tmp));
 	}
 
 	/* create backup catalog root directory */
-	dir_create_dir(backup_path, DIR_PERMISSION, false);
+	dir_create_dir(backup_catalog_path, DIR_PERMISSION, false);
 
 	/* create backup catalog data directory */
-	join_path_components(path, backup_path, BACKUPS_DIR);
+	join_path_components(path, backup_catalog_path, BACKUPS_DIR);
 	dir_create_dir(path, DIR_PERMISSION, false);
 
 	/* create backup catalog wal directory */
-	join_path_components(arclog_path_dir, backup_path, "wal");
+	join_path_components(arclog_path_dir, backup_catalog_path, "wal");
 	dir_create_dir(arclog_path_dir, DIR_PERMISSION, false);
 
-	elog(INFO, "Backup catalog '%s' successfully inited", backup_path);
+	elog(INFO, "Backup catalog '%s' successfully inited", backup_catalog_path);
 	return 0;
 }
 

src/pg_probackup.c

@@ -2,6 +2,13 @@
  *
  * pg_probackup.c: Backup/Recovery manager for PostgreSQL.
  *
+ * This is an entry point for the program.
+ * Parse command name and it's options, verify them and call a
+ * do_***() function that implements the command.
+ *
+ * Avoid using global variables in the code.
+ * Pass all needed information as funciton arguments.
+ *
  * Portions Copyright (c) 2009-2013, NIPPON TELEGRAPH AND TELEPHONE CORPORATION
  * Portions Copyright (c) 2015-2019, Postgres Professional
  *
@@ -28,6 +35,7 @@ const char  *PROGRAM_URL = "https://github.com/postgrespro/pg_probackup";
 const char  *PROGRAM_EMAIL = "https://github.com/postgrespro/pg_probackup/issues";
 
 /* directory options */
+/* TODO make it local variable, pass as an argument to all commands that need it.  */
 char	   *backup_path = NULL;
 /*
  * path or to the data files in the backup catalog
@@ -739,7 +747,7 @@ main(int argc, char *argv[])
 		case DELETE_INSTANCE_CMD:
 			return do_delete_instance();
 		case INIT_CMD:
-			return do_init();
+			return do_init(backup_path);
 		case BACKUP_CMD:
 			{
 				current.stream = stream_wal;

src/pg_probackup.h

@@ -839,7 +839,7 @@ extern void merge_chain(parray *parent_chain,
 extern parray *read_database_map(pgBackup *backup);
 
 /* in init.c */
-extern int do_init(void);
+extern int do_init(char *backup_catalog_path);
 extern int do_add_instance(InstanceConfig *instance);
 
 /* in archive.c */