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pg_probackup/init.c

75 lines
1.8 KiB
C

/*-------------------------------------------------------------------------
*
* init.c: - initialize backup catalog.
*
* Portions Copyright (c) 2009-2011, NIPPON TELEGRAPH AND TELEPHONE CORPORATION
* Portions Copyright (c) 2015-2017, Postgres Professional
*
*-------------------------------------------------------------------------
*/
#include "pg_probackup.h"
#include <unistd.h>
#include <dirent.h>
/*
* selects function for scandir.
* Select all files except hidden.
*/
static int selects(const struct dirent *dir)
{
return dir->d_name[0] != '.';
}
/*
* Initialize backup catalog.
*/
int
do_init(void)
{
char path[MAXPGPATH];
char arclog_path_dir[MAXPGPATH];
struct dirent **dp;
int results;
pgBackupConfig *config = pgut_new(pgBackupConfig);
/* PGDATA is always required */
if (pgdata == NULL)
elog(ERROR, "Required parameter not specified: PGDATA "
"(-D, --pgdata)");
if (access(backup_path, F_OK) == 0)
{
results = scandir(backup_path, &dp, selects, NULL);
if (results != 0)
elog(ERROR, "backup catalog already exist and it's not empty");
}
/* Read system_identifier from PGDATA */
system_identifier = get_system_identifier();
/* create backup catalog root directory */
dir_create_dir(backup_path, DIR_PERMISSION);
/* create directories for backup of online files */
join_path_components(path, backup_path, BACKUPS_DIR);
dir_create_dir(path, DIR_PERMISSION);
/* Create "wal" directory */
join_path_components(arclog_path_dir, backup_path, "wal");
dir_create_dir(arclog_path_dir, DIR_PERMISSION);
/*
* Wite initial config. system-identifier and pgdata are set in
* init subcommand and will never be updated.
*/
pgBackupConfigInit(config);
config->system_identifier = system_identifier;
config->pgdata = pgdata;
writeBackupCatalogConfigFile(config);
return 0;
}