gdbmshell: get rid of remaining globals

Use gdbmshell variables instead

* src/gdbmshell.c (file_name, file_descr)
(open_mode, open_format): Remove globals.
(opendb,checkdb)
(open_handler,import_handler)
(status_handler): Use variables instead of globals.
(command_tab): Mark the "open" parameter as optional.
* src/gdbmtool.c (gdbmtool_init): Use variables instead of globals.
* src/gdbmtool.h (file_name, file_descr)
(open_mode, open_format): Remove globals.
* src/lex.l: Use variables instead of globals.
* src/var.c (variable): Rename hook to sethook.
New field: typeconv.
(vartab): New variables: "filename", "fd".
(variable_get): Use typeconv if provided.
* tests/gdbmtool/base.exp: Fix expected output.
* tests/gdbmtool00.at: Likewise.
* tests/gdbmtool01.at: Likewise.

1 files changed, 3 insertions, 1 deletions

diff --git a/src/lex.l b/src/lex.l
index 1a57a3a..f35d2fc 100644
--- a/src/lex.l
+++ b/src/lex.l
@@ -503,7 +503,9 @@ lerror (struct locus *loc, const char *fmt, ...)
 static struct slist *
 pe_file_name (void)
 {
-  return file_name ? slist_new (file_name) : NULL;
+  char *name = NULL;
+  variable_get ("filename", VART_STRING, (void**) &name);
+  return name ? slist_new (name) : NULL;
 }
 
 static struct slist *