fix for bug #5920 (embedded-server mysql doesn't handle --defaults-file)

client/mysql.cc:
  bug #5920 (embedded-server mysql doesn't handle --defaults-file)
  defaults files handled
include/my_sys.h:
  bug #5920 (embedded-server mysql doesn't handle --defaults-file)
  get_defaults_file interface added
libmysqld/libmysqld.c:
  just small fix, not related to the bug.
mysys/default.c:
  bug #5920 (embedded-server mysql doesn't handle --defaults-file)
  get_defaults_files implementation

1 files changed, 39 insertions, 16 deletions

diff --git a/mysys/default.c b/mysys/default.c
index ea23bbb6693..5f554ac36f6 100644
--- a/mysys/default.c
+++ b/mysys/default.c
@@ -79,6 +79,36 @@ static char *remove_end_comment(char *ptr);
 
 
 /*
+  Gets --defaults-file and --defaults-extra-file options from command line.
+
+  SYNOPSIS
+    get_defaults_files()
+    argc			Pointer to argc of original program
+    argv			Pointer to argv of original program
+    defaults                    --defaults-file option
+    extra_defaults              --defaults-extra-file option
+
+  RETURN
+    defaults and extra_defaults will be set to appropriate items
+    of argv array, or to NULL if there are no such options
+*/
+
+void get_defaults_files(int argc, char **argv,
+                        char **defaults, char **extra_defaults)
+{
+  *defaults=0;
+  *extra_defaults=0;
+  if (argc >= 2)
+  {
+    if (is_prefix(argv[1],"--defaults-file="))
+      *defaults= argv[1];
+    else if (is_prefix(argv[1],"--defaults-extra-file="))
+      *extra_defaults= argv[1];
+  }
+}
+
+
+/*
   Read options from configurations files
 
   SYNOPSIS
@@ -111,7 +141,7 @@ static char *remove_end_comment(char *ptr);
 
 
 int load_defaults(const char *conf_file, const char **groups,
-		   int *argc, char ***argv)
+                  int *argc, char ***argv)
 {
   DYNAMIC_ARRAY args;
   const char **dirs, *forced_default_file;
@@ -143,21 +173,14 @@ int load_defaults(const char *conf_file, const char **groups,
     DBUG_RETURN(0);
   }
 
-  /* Check if we want to force the use a specific default file */
-  forced_default_file=0;
-  if (*argc >= 2)
-  {
-    if (is_prefix(argv[0][1],"--defaults-file="))
-    {
-      forced_default_file=strchr(argv[0][1],'=')+1;
-      args_used++;
-    }
-    else if (is_prefix(argv[0][1],"--defaults-extra-file="))
-    {
-      defaults_extra_file=strchr(argv[0][1],'=')+1;
-      args_used++;
-    }
-  }
+  get_defaults_files(*argc, *argv,
+                      (char **)&forced_default_file, &defaults_extra_file);
+  if (forced_default_file)
+    forced_default_file= strchr(forced_default_file,'=')+1;
+  if (defaults_extra_file)
+    defaults_extra_file= strchr(defaults_extra_file,'=')+1;
+
+  args_used+= (forced_default_file ? 1 : 0) + (defaults_extra_file ? 1 : 0);
 
   group.count=0;
   group.name= "defaults";