Change return value of gdbm_close and gdbm_sync

* src/gdbm.h.in (gdbm_close, gdbm_sync): Return int
(GDBM_FILE_CLOSE_ERROR, GDBM_FILE_SYNC_ERROR): New error codes.
* src/gdbmclose.c (gdbm_close): Return 0 on success, -1 on failure.
Set gdbm_errno and errno.
* src/gdbmsync.c (gdbm_sync): Likewise.
* src/gdbmerrno.c: Handle new error codes.
* src/mmap.c (_gdbm_mapped_sync): Set gdbm_errno.
* src/proto.h (gdbm_file_sync): Set gdbm_errno.

* doc/gdbm.3: Document changes.
* doc/gdbm.texi: Document changes.
* NEWS: Document changes.
* configure.ac: Set patchlevel.

* tests/Makefile.am: Add new test.
* tests/testsuite.at: Add new test.
* tests/closerr.at: New test case.
* tests/closerr.c: New test program.
* tests/gtdel.c: Check gdbm_close return.
* tests/gtdump.c: Likewise.
* tests/gtfetch.c: Likewise.
* tests/gtload.c: Likewise.
* tests/gtopt.c: Likewise.
* tests/gtrecover.c: Likewise.

1 files changed, 7 insertions, 1 deletions

diff --git a/tests/gtdel.c b/tests/gtdel.c
index 729086c..d0c711d 100644
--- a/tests/gtdel.c
+++ b/tests/gtdel.c
@@ -18,6 +18,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <errno.h>
 #include "gdbm.h"
 #include "progname.h"
 
@@ -93,6 +94,11 @@ main (int argc, char **argv)
 	  rc = 2;
 	}
     }
-  gdbm_close (dbf);
+  if (gdbm_close (dbf))
+    {
+      fprintf (stderr, "gdbm_close: %s; %s\n", gdbm_strerror (gdbm_errno),
+	       strerror (errno));
+      rc = 3;
+    }
   exit (rc);
 }