Introduce debug hooks.

* configure.ac: New option --enable-debug
Print feature summary at the end of the run.

* src/debug.c: New file.
* src/Makefile.am [GDBM_COND_DEBUG_ENABLE]: Build debug.o
Define GDBM_DEBUG_ENABLE.
* src/gdbmdefs.h [GDBM_DEBUG_ENABLE] (_gdbm_debug_hook_install)
(_gdbm_debug_hook_remove,_gdbm_debug_hook_check)
(_gdbm_debug_hook_val): New protos.
(GDBM_DEBUG_HOOK, GDBM_DEBUG_OVERRIDE)
(GDBM_DEBUG_ALLOC): New defines.
* src/gdbm.h.in (GDBM_RCVR_FORCE): New flag.
* src/recover.c (gdbm_recover): Check database before attempting
recovery, unless GDBM_RCVR_FORCE flag is set.
* doc/gdbm.texi: Document GDBM_RCVR_FORCE
* src/gdbmreorg.c (gdbm_reorganize): Use GDBM_RCVR_FORCE.

* src/gdbmtool.c (main): Always allocate file_name.

* src/bucket.c: Put GDBM_DEBUG_OVERRIDE and GDBM_DEBUG_ALLOC
in critical places.
* src/falloc.c: Likewise.
* src/findkey.c: Likewise.
* src/gdbmopen.c: Likewise.
* src/gdbmstore.c: Likewise.
* src/update.c: Likewise.

* tests/Makefile.am [GDBM_COND_DEBUG_ENABLE]: Define GDBM_DEBUG_ENABLE.
* tests/gtload.c: New options -hook, -recover, -verbose,
-backup, -max-failures, -max-failed-keys,
and -max-failed-buckets.
Attempt recovery after errors.

1 files changed, 7 insertions, 0 deletions

diff --git a/doc/gdbm.texi b/doc/gdbm.texi
index 866a672..7f93046 100644
--- a/doc/gdbm.texi
+++ b/doc/gdbm.texi
@@ -1135,6 +1135,13 @@ The caller is responsible for freeing that memory when no longer needed.
 @end deftypecv
 @end deftypefn
 
+@kwindex GDBM_RCVR_FORCE
+By default, @code{gdbm_recovery} first checks the database fo
+inconsistencies and attempts recovery only if some were found.
+The special flag bit @code{GDBM_RCVR_FORCE} instructs
+@code{gdbm_recovery} to omit this check and to force recovery
+unconditionally.
+
 @node Options
 @chapter Setting options
 @cindex database options