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Be more conservative about removing tablespace "symlinks".

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Don't apply rmtree(), which will gleefully remove an entire subtree,
and don't even apply unlink() unless it's symlink or a directory,
the only things that we expect to find.

Amit Kapila, with minor tweaks by me, per extensive discussions
involving Andrew Dunstan, Fujii Masao, and Heikki Linnakangas,
at least some of whom also reviewed the code.
This commit is contained in:
Robert Haas
2015-06-26 15:53:13 -04:00
parent c66bc72e8a
commit 8f15f74a44
3 changed files with 69 additions and 45 deletions
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src/include/commands/tablespace.h
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@@ -56,6 +56,7 @@ extern Oid get_tablespace_oid(const char *tablespacename, bool missing_ok);
extern char *get_tablespace_name(Oid spc_oid);
extern bool directory_is_empty(const char *path);
extern void remove_tablespace_symlink(const char *linkloc);
extern void tblspc_redo(XLogReaderState *rptr);
extern void tblspc_desc(StringInfo buf, XLogReaderState *rptr);