Fix for BUG#3248 "Doc says MyISAM warns if disk full but it does not":

we force the message to the error log, and we make it more informative;
we treat EDQUOT like ENOSPC.


mysys/errors.c:
  more informative message
mysys/my_fstream.c:
  Treat EDQUOT like ENOSPC.
mysys/my_pread.c:
  Treat EDQUOT like ENOSPC.
mysys/my_write.c:
  Treat EDQUOT like ENOSPC.
mysys/mysys_priv.h:
  Define EDQUOT when it does not exist. Finally decided to put it here after discussion with Monty:
  as this constant is used only in 3 files only in mysys/, I don't make it visible everywhere
  (there currently is no file of choice for such defines; my_base.h does not contain any).
  Using a value which never happens avoids collisions.
sql/mysqld.cc:
  If ME_NOREFRESH, we write message to error log, even if it has been saved for client (because if operation
  is hanging, the message does not get to client now; example is MyISAM waiting for free disk space).

1 files changed, 2 insertions, 3 deletions

diff --git a/sql/mysqld.cc b/sql/mysqld.cc
index 06599cf0ea7..834cff0d869 100644
--- a/sql/mysqld.cc
+++ b/sql/mysqld.cc
@@ -2080,8 +2080,7 @@ static void check_data_home(const char *path)
 
 
 /* ARGSUSED */
-extern "C" int my_message_sql(uint error, const char *str,
-			      myf MyFlags __attribute__((unused)))
+extern "C" int my_message_sql(uint error, const char *str, myf MyFlags)
 {
   NET *net;
   DBUG_ENTER("my_message_sql");
@@ -2094,7 +2093,7 @@ extern "C" int my_message_sql(uint error, const char *str,
       net->last_errno=error ? error : ER_UNKNOWN_ERROR;
     }
   }
-  else
+  if (!net || MyFlags & ME_NOREFRESH)
     sql_print_error("%s: %s",my_progname,str); /* purecov: inspected */
   DBUG_RETURN(0);
 }