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"standby clone": cowardly refuse to clone into an active data directory

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By checking the PID file in the same way pg_ctl does, we can be pretty
much certain whether the target data directory contains an active
PostgreSQL instance.
This commit is contained in:
Ian Barwick
2018-02-07 23:27:45 +09:00
committed by Ian Barwick
parent 76cc11b786
commit 571e6b2783
3 changed files with 167 additions and 59 deletions
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19
dirutil.h
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@@ -19,12 +19,29 @@
#ifndef _DIRUTIL_H_
#define _DIRUTIL_H_
typedef enum
{
DIR_ERROR = -1,
DIR_NOENT,
DIR_EMPTY,
DIR_NOT_EMPTY
} DataDirState;
typedef enum
{
PG_DIR_ERROR = -1,
PG_DIR_NOT_RUNNING,
PG_DIR_RUNNING
} PgDirState;
extern int mkdir_p(char *path, mode_t omode);
extern bool set_dir_permissions(char *path);
extern int check_dir(char *path);
extern DataDirState check_dir(char *path);
extern bool create_dir(char *path);
extern bool is_pg_dir(char *path);
extern PgDirState is_pg_running(char *path);
extern bool create_pg_dir(char *path, bool force);
extern int rmdir_recursive(char *path);
#endif