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Arrange for the postmaster (and standalone backends, initdb, etc) to

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chdir into PGDATA and subsequently use relative paths instead of absolute
paths to access all files under PGDATA.  This seems to give a small
performance improvement, and it should make the system more robust
against naive DBAs doing things like moving a database directory that
has a live postmaster in it.  Per recent discussion.
This commit is contained in:
Tom Lane
2005-07-04 04:51:52 +00:00
parent 7504f0bae8
commit eb5949d190
27 changed files with 364 additions and 474 deletions
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14
src/backend/commands/tablespace.c
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@ -37,7 +37,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/commands/tablespace.c,v 1.23 2005/06/28 05:08:54 tgl Exp $
* $PostgreSQL: pgsql/src/backend/commands/tablespace.c,v 1.24 2005/07/04 04:51:46 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -338,8 +338,8 @@ CreateTableSpace(CreateTableSpaceStmt *stmt)
/*
* All seems well, create the symlink
*/
linkloc = (char *) palloc(strlen(DataDir) + 11 + 10 + 1);
sprintf(linkloc, "%s/pg_tblspc/%u", DataDir, tablespaceoid);
linkloc = (char *) palloc(10 + 10 + 1);
sprintf(linkloc, "pg_tblspc/%u", tablespaceoid);
if (symlink(location, linkloc) < 0)
ereport(ERROR,
@ -491,8 +491,8 @@ remove_tablespace_directories(Oid tablespaceoid, bool redo)
char *subfile;
struct stat st;
location = (char *) palloc(strlen(DataDir) + 11 + 10 + 1);
sprintf(location, "%s/pg_tblspc/%u", DataDir, tablespaceoid);
location = (char *) palloc(10 + 10 + 1);
sprintf(location, "pg_tblspc/%u", tablespaceoid);
/*
* Check if the tablespace still contains any files. We try to rmdir
@ -989,8 +989,8 @@ tblspc_redo(XLogRecPtr lsn, XLogRecord *record)
set_short_version(location);
/* Create the symlink if not already present */
linkloc = (char *) palloc(strlen(DataDir) + 11 + 10 + 1);
sprintf(linkloc, "%s/pg_tblspc/%u", DataDir, xlrec->ts_id);
linkloc = (char *) palloc(10 + 10 + 1);
sprintf(linkloc, "pg_tblspc/%u", xlrec->ts_id);
if (symlink(location, linkloc) < 0)
{