Ensure that kernel error code is included in smgr-level error reports.

Tweak mdcreate a little bit so that it returns the right errno.

src/backend/storage/smgr/md.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/storage/smgr/md.c,v 1.70 2000/06/02 15:57:26 momjian Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/storage/smgr/md.c,v 1.71 2000/06/19 23:37:08 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -130,34 +130,41 @@ mdcreate(Relation reln)
 	char	   *path;
 
 	Assert(reln->rd_unlinked && reln->rd_fd < 0);
+
 	path = relpath(RelationGetPhysicalRelationName(reln));
 	fd = FileNameOpenFile(path, O_RDWR | O_CREAT | O_EXCL | PG_BINARY, 0600);
 
 	/*
-	 * During bootstrap processing, we skip that check, because pg_time,
-	 * pg_variable, and pg_log get created before their .bki file entries
-	 * are processed.
-	 *
-	 * For cataloged relations,pg_class is guaranteed to have an unique
+	 * For cataloged relations, pg_class is guaranteed to have a unique
 	 * record with the same relname by the unique index. So we are able to
-	 * reuse existent files for new catloged relations. Currently we reuse
+	 * reuse existent files for new cataloged relations. Currently we reuse
 	 * them in the following cases. 1. they are empty. 2. they are used
 	 * for Index relations and their size == BLCKSZ * 2.
+	 *
+	 * During bootstrap processing, we skip that check, because pg_time,
+	 * pg_variable, and pg_log get created before their .bki file entries
+	 * are processed.
 	 */
 
 	if (fd < 0)
 	{
+		int		save_errno = errno;
+
 		if (!IsBootstrapProcessingMode() &&
 			reln->rd_rel->relkind == RELKIND_UNCATALOGED)
 			return -1;
 
 		fd = FileNameOpenFile(path, O_RDWR | PG_BINARY, 0600);
 		if (fd < 0)
+		{
+			/* be sure to return the error reported by create, not open */
+			errno = save_errno;
 			return -1;
+		}
 		if (!IsBootstrapProcessingMode())
 		{
 			bool		reuse = false;
-			int			len = FileSeek(fd, 0L, SEEK_END);
+			long		len = FileSeek(fd, 0L, SEEK_END);
 
 			if (len == 0)
 				reuse = true;
@@ -167,9 +174,12 @@ mdcreate(Relation reln)
 			if (!reuse)
 			{
 				FileClose(fd);
+				/* be sure to return the error reported by create */
+				errno = save_errno;
 				return -1;
 			}
 		}
+		errno = 0;
 	}
 	reln->rd_unlinked = false;
 

src/backend/storage/smgr/smgr.c

@@ -11,7 +11,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/storage/smgr/smgr.c,v 1.36 2000/06/05 07:28:47 tgl Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/storage/smgr/smgr.c,v 1.37 2000/06/19 23:37:08 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -105,7 +105,7 @@ smgrinit()
 		if (smgrsw[i].smgr_init)
 		{
 			if ((*(smgrsw[i].smgr_init)) () == SM_FAIL)
-				elog(FATAL, "initialization failed on %s",
+				elog(FATAL, "initialization failed on %s: %m",
 					 DatumGetCString(DirectFunctionCall1(smgrout,
 														 Int16GetDatum(i))));
 		}
@@ -127,7 +127,7 @@ smgrshutdown(int dummy)
 		if (smgrsw[i].smgr_shutdown)
 		{
 			if ((*(smgrsw[i].smgr_shutdown)) () == SM_FAIL)
-				elog(FATAL, "shutdown failed on %s",
+				elog(FATAL, "shutdown failed on %s: %m",
 					 DatumGetCString(DirectFunctionCall1(smgrout,
 														 Int16GetDatum(i))));
 		}
@@ -146,7 +146,7 @@ smgrcreate(int16 which, Relation reln)
 	int			fd;
 
 	if ((fd = (*(smgrsw[which].smgr_create)) (reln)) < 0)
-		elog(ERROR, "cannot create %s", RelationGetRelationName(reln));
+		elog(ERROR, "cannot create %s: %m", RelationGetRelationName(reln));
 
 	return fd;
 }
@@ -162,7 +162,7 @@ smgrunlink(int16 which, Relation reln)
 	int			status;
 
 	if ((status = (*(smgrsw[which].smgr_unlink)) (reln)) == SM_FAIL)
-		elog(ERROR, "cannot unlink %s", RelationGetRelationName(reln));
+		elog(ERROR, "cannot unlink %s: %m", RelationGetRelationName(reln));
 
 	return status;
 }
@@ -181,7 +181,7 @@ smgrextend(int16 which, Relation reln, char *buffer)
 	status = (*(smgrsw[which].smgr_extend)) (reln, buffer);
 
 	if (status == SM_FAIL)
-		elog(ERROR, "%s: cannot extend.  Check free disk space.",
+		elog(ERROR, "cannot extend %s: %m.\n\tCheck free disk space.",
 			 RelationGetRelationName(reln));
 
 	return status;
@@ -200,7 +200,7 @@ smgropen(int16 which, Relation reln)
 
 	if ((fd = (*(smgrsw[which].smgr_open)) (reln)) < 0 &&
 		!reln->rd_unlinked)
-		elog(ERROR, "cannot open %s", RelationGetRelationName(reln));
+		elog(ERROR, "cannot open %s: %m", RelationGetRelationName(reln));
 
 	return fd;
 }
@@ -220,7 +220,7 @@ int
 smgrclose(int16 which, Relation reln)
 {
 	if ((*(smgrsw[which].smgr_close)) (reln) == SM_FAIL)
-		elog(ERROR, "cannot close %s", RelationGetRelationName(reln));
+		elog(ERROR, "cannot close %s: %m", RelationGetRelationName(reln));
 
 	return SM_SUCCESS;
 }
@@ -243,7 +243,7 @@ smgrread(int16 which, Relation reln, BlockNumber blocknum, char *buffer)
 	status = (*(smgrsw[which].smgr_read)) (reln, blocknum, buffer);
 
 	if (status == SM_FAIL)
-		elog(ERROR, "cannot read block %d of %s",
+		elog(ERROR, "cannot read block %d of %s: %m",
 			 blocknum, RelationGetRelationName(reln));
 
 	return status;
@@ -265,7 +265,7 @@ smgrwrite(int16 which, Relation reln, BlockNumber blocknum, char *buffer)
 	status = (*(smgrsw[which].smgr_write)) (reln, blocknum, buffer);
 
 	if (status == SM_FAIL)
-		elog(ERROR, "cannot write block %d of %s",
+		elog(ERROR, "cannot write block %d of %s: %m",
 			 blocknum, RelationGetRelationName(reln));
 
 	return status;
@@ -282,7 +282,7 @@ smgrflush(int16 which, Relation reln, BlockNumber blocknum, char *buffer)
 	status = (*(smgrsw[which].smgr_flush)) (reln, blocknum, buffer);
 
 	if (status == SM_FAIL)
-		elog(ERROR, "cannot flush block %d of %s to stable store",
+		elog(ERROR, "cannot flush block %d of %s to stable store: %m",
 			 blocknum, RelationGetRelationName(reln));
 
 	return status;
@@ -323,7 +323,7 @@ smgrblindwrt(int16 which,
 											   blkno, buffer, dofsync);
 
 	if (status == SM_FAIL)
-		elog(ERROR, "cannot write block %d of %s [%s] blind",
+		elog(ERROR, "cannot write block %d of %s [%s] blind: %m",
 			 blkno, relstr, dbstr);
 
 	pfree(dbstr);
@@ -352,7 +352,7 @@ smgrmarkdirty(int16 which,
 	status = (*(smgrsw[which].smgr_markdirty)) (reln, blkno);
 
 	if (status == SM_FAIL)
-		elog(ERROR, "cannot mark block %d of %s",
+		elog(ERROR, "cannot mark block %d of %s: %m",
 			 blkno, RelationGetRelationName(reln));
 
 	return status;
@@ -384,7 +384,7 @@ smgrblindmarkdirty(int16 which,
 													 blkno);
 
 	if (status == SM_FAIL)
-		elog(ERROR, "cannot mark block %d of %s [%s] blind",
+		elog(ERROR, "cannot mark block %d of %s [%s] blind: %m",
 			 blkno, relstr, dbstr);
 
 	pfree(dbstr);
@@ -406,7 +406,7 @@ smgrnblocks(int16 which, Relation reln)
 	int			nblocks;
 
 	if ((nblocks = (*(smgrsw[which].smgr_nblocks)) (reln)) < 0)
-		elog(ERROR, "cannot count blocks for %s",
+		elog(ERROR, "cannot count blocks for %s: %m",
 			 RelationGetRelationName(reln));
 
 	return nblocks;
@@ -428,7 +428,7 @@ smgrtruncate(int16 which, Relation reln, int nblocks)
 	if (smgrsw[which].smgr_truncate)
 	{
 		if ((newblks = (*(smgrsw[which].smgr_truncate)) (reln, nblocks)) < 0)
-			elog(ERROR, "cannot truncate %s to %d blocks",
+			elog(ERROR, "cannot truncate %s to %d blocks: %m",
 				 RelationGetRelationName(reln), nblocks);
 	}
 
@@ -449,7 +449,7 @@ smgrcommit()
 		if (smgrsw[i].smgr_commit)
 		{
 			if ((*(smgrsw[i].smgr_commit)) () == SM_FAIL)
-				elog(FATAL, "transaction commit failed on %s",
+				elog(FATAL, "transaction commit failed on %s: %m",
 					 DatumGetCString(DirectFunctionCall1(smgrout,
 														 Int16GetDatum(i))));
 		}
@@ -468,7 +468,7 @@ smgrabort()
 		if (smgrsw[i].smgr_abort)
 		{
 			if ((*(smgrsw[i].smgr_abort)) () == SM_FAIL)
-				elog(FATAL, "transaction abort failed on %s",
+				elog(FATAL, "transaction abort failed on %s: %m",
 					 DatumGetCString(DirectFunctionCall1(smgrout,
 														 Int16GetDatum(i))));
 		}