1 files changed, 0 insertions, 276 deletions
diff --git a/src/backend/utils/misc/database.c b/src/backend/utils/misc/database.c
deleted file mode 100644
index 9b2cb49022f..00000000000
--- a/src/backend/utils/misc/database.c
+++ /dev/null
@@ -1,276 +0,0 @@
-/*-------------------------------------------------------------------------
- *
- * database.c
- *	  miscellaneous initialization support stuff
- *
- * Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
- * Portions Copyright (c) 1994, Regents of the University of California
- *
- *
- * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/utils/misc/Attic/database.c,v 1.51 2002/06/20 20:29:40 momjian Exp $
- *
- *-------------------------------------------------------------------------
- */
-#include "postgres.h"
-
-#include <fcntl.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-
-#include "access/xact.h"
-#include "catalog/catname.h"
-#include "catalog/catalog.h"
-#include "catalog/pg_database.h"
-#include "miscadmin.h"
-#include "utils/syscache.h"
-
-
-static bool PhonyHeapTupleSatisfiesNow(HeapTupleHeader tuple);
-
-
-/*
- * ExpandDatabasePath resolves a proposed database path (obtained from
- * pg_database.datpath) to a full absolute path for further consumption.
- * NULL means an error, which the caller should process. One reason for
- * such an error would be an absolute alternative path when no absolute
- * paths are alllowed.
- */
-
-char *
-ExpandDatabasePath(const char *dbpath)
-{
-	char		buf[MAXPGPATH];
-	const char *cp;
-	int			len;
-
-	AssertArg(dbpath);
-	Assert(DataDir);
-
-	if (strlen(dbpath) >= MAXPGPATH)
-		return NULL;			/* ain't gonna fit nohow */
-
-	/* leading path delimiter? then already absolute path */
-	if (*dbpath == '/')
-	{
-#ifdef ALLOW_ABSOLUTE_DBPATHS
-		cp = strrchr(dbpath, '/');
-		len = cp - dbpath;
-		strncpy(buf, dbpath, len);
-		snprintf(&buf[len], MAXPGPATH - len, "/base/%s", (cp + 1));
-#else
-		return NULL;
-#endif
-	}
-	/* path delimiter somewhere? then has leading environment variable */
-	else if ((cp = strchr(dbpath, '/')) != NULL)
-	{
-		const char *envvar;
-
-		len = cp - dbpath;
-		strncpy(buf, dbpath, len);
-		buf[len] = '\0';
-		envvar = getenv(buf);
-		if (envvar == NULL)
-			return NULL;
-
-		snprintf(buf, sizeof(buf), "%s/base/%s", envvar, (cp + 1));
-	}
-	else
-	{
-		/* no path delimiter? then add the default path prefix */
-		snprintf(buf, sizeof(buf), "%s/base/%s", DataDir, dbpath);
-	}
-
-	/*
-	 * check for illegal characters in dbpath these should really throw an
-	 * error, shouldn't they? or else all callers need to test for NULL
-	 */
-	for (cp = buf; *cp; cp++)
-	{
-		/*
-		 * The following characters will not be allowed anywhere in the
-		 * database path. (Do not include the slash  or '.' here.)
-		 */
-		char		illegal_dbpath_chars[] =
-		"\001\002\003\004\005\006\007\010"
-		"\011\012\013\014\015\016\017\020"
-		"\021\022\023\024\025\026\027\030"
-		"\031\032\033\034\035\036\037"
-		"'`";
-
-		const char *cx;
-
-		for (cx = illegal_dbpath_chars; *cx; cx++)
-			if (*cp == *cx)
-				return NULL;
-		/* don't allow access to parent dirs */
-		if (strncmp(cp, "/../", 4) == 0)
-			return NULL;
-	}
-
-	return pstrdup(buf);
-}	/* ExpandDatabasePath() */
-
-
-
-/* --------------------------------
- *	GetRawDatabaseInfo() -- Find the OID and path of the database.
- *
- *		The database's oid forms half of the unique key for the system
- *		caches and lock tables.  We therefore want it initialized before
- *		we open any relations, since opening relations puts things in the
- *		cache.	To get around this problem, this code opens and scans the
- *		pg_database relation by hand.
- *
- *		This code knows way more than it should about the layout of
- *		tuples on disk, but there seems to be no help for that.
- *		We're pulling ourselves up by the bootstraps here...
- * --------------------------------
- */
-void
-GetRawDatabaseInfo(const char *name, Oid *db_id, char *path)
-{
-	int			dbfd;
-	int			nbytes;
-	int			pathlen;
-	HeapTupleData tup;
-	Page		pg;
-	char	   *dbfname;
-	Form_pg_database tup_db;
-	RelFileNode rnode;
-
-	rnode.tblNode = 0;
-	rnode.relNode = RelOid_pg_database;
-	dbfname = relpath(rnode);
-
-	if ((dbfd = open(dbfname, O_RDONLY | PG_BINARY, 0)) < 0)
-		elog(FATAL, "cannot open %s: %m", dbfname);
-
-	pfree(dbfname);
-
-	/*
-	 * read and examine every page in pg_database
-	 *
-	 * Raw I/O! Read those tuples the hard way! Yow!
-	 *
-	 * Why don't we use the access methods or move this code someplace else?
-	 * This is really pg_database schema dependent code.  Perhaps it
-	 * should go in lib/catalog/pg_database? -cim 10/3/90
-	 *
-	 * mao replies 4 apr 91:  yeah, maybe this should be moved to
-	 * lib/catalog.  however, we CANNOT use the access methods since those
-	 * use the buffer cache, which uses the relation cache, which requires
-	 * that the dbid be set, which is what we're trying to do here.
-	 *
-	 */
-	pg = (Page) palloc(BLCKSZ);
-
-	while ((nbytes = read(dbfd, pg, BLCKSZ)) == BLCKSZ)
-	{
-		OffsetNumber max = PageGetMaxOffsetNumber(pg);
-		OffsetNumber lineoff;
-
-		/* look at each tuple on the page */
-		for (lineoff = FirstOffsetNumber; lineoff <= max; lineoff++)
-		{
-			ItemId		lpp = PageGetItemId(pg, lineoff);
-
-			/* if it's a freed tuple, ignore it */
-			if (!ItemIdIsUsed(lpp))
-				continue;
-
-			/* get a pointer to the tuple itself */
-			tup.t_datamcxt = NULL;
-			tup.t_data = (HeapTupleHeader) PageGetItem(pg, lpp);
-
-			/*
-			 * Check to see if tuple is valid (committed).
-			 *
-			 * XXX warning, will robinson: violation of transaction semantics
-			 * happens right here.	We cannot really determine if the
-			 * tuple is valid without checking transaction commit status,
-			 * and the only way to do that at init time is to paw over
-			 * pg_clog by hand, too.  Instead of checking, we assume that
-			 * the inserting transaction committed, and that any deleting
-			 * transaction did also, unless shown otherwise by on-row
-			 * commit status bits.
-			 *
-			 * All in all, this code is pretty shaky.  We will cross-check
-			 * our result in ReverifyMyDatabase() in postinit.c.
-			 *
-			 * NOTE: if a bogus tuple in pg_database prevents connection to a
-			 * valid database, a fix is to connect to another database and
-			 * do "select * from pg_database".	That should cause
-			 * committed and dead tuples to be marked with correct states.
-			 *
-			 * XXX wouldn't it be better to let new backends read the
-			 * database OID from a flat file, handled the same way we
-			 * handle the password relation?
-			 */
-			if (!PhonyHeapTupleSatisfiesNow(tup.t_data))
-				continue;
-
-			/*
-			 * Okay, see if this is the one we want.
-			 */
-			tup_db = (Form_pg_database) GETSTRUCT(&tup);
-
-			if (strcmp(name, NameStr(tup_db->datname)) == 0)
-			{
-				/* Found it; extract the OID and the database path. */
-				*db_id = tup.t_data->t_oid;
-				pathlen = VARSIZE(&(tup_db->datpath)) - VARHDRSZ;
-				if (pathlen < 0)
-					pathlen = 0;				/* pure paranoia */
-				if (pathlen >= MAXPGPATH)
-					pathlen = MAXPGPATH - 1;	/* more paranoia */
-				strncpy(path, VARDATA(&(tup_db->datpath)), pathlen);
-				path[pathlen] = '\0';
-				goto done;
-			}
-		}
-	}
-
-	/* failed to find it... */
-	*db_id = InvalidOid;
-	*path = '\0';
-
-done:
-	close(dbfd);
-	pfree(pg);
-}
-
-/*
- * PhonyHeapTupleSatisfiesNow --- cut-down tuple time qual test
- *
- * This is a simplified version of HeapTupleSatisfiesNow() that does not
- * depend on having transaction commit info available.	Any transaction
- * that touched the tuple is assumed committed unless later marked invalid.
- * (While we could think about more complex rules, this seems appropriate
- * for examining pg_database, since both CREATE DATABASE and DROP DATABASE
- * are non-roll-back-able.)
- */
-static bool
-PhonyHeapTupleSatisfiesNow(HeapTupleHeader tuple)
-{
-	if (!(tuple->t_infomask & HEAP_XMIN_COMMITTED))
-	{
-		if (tuple->t_infomask & HEAP_XMIN_INVALID)
-			return false;
-
-		if (tuple->t_infomask & HEAP_MOVED_OFF)
-			return false;
-		/* else assume committed */
-	}
-
-	if (tuple->t_infomask & HEAP_XMAX_INVALID)	/* xid invalid or aborted */
-		return true;
-
-	/* assume xmax transaction committed */
-	if (tuple->t_infomask & HEAP_MARKED_FOR_UPDATE)
-		return true;
-
-	return false;
-}