mdadm: add an environment variable to prevent auto-launching mdmon

Useful for attaching gdb to mdmon before any action is taken on the array.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/mdadm.h b/mdadm.h
index 72104da..3672bc9 100644
--- a/mdadm.h
+++ b/mdadm.h
@@ -773,6 +773,7 @@ extern int open_container(int fd);
 
 extern int mdmon_running(int devnum);
 extern int signal_mdmon(int devnum);
+extern int env_no_mdmon(void);
 
 extern char *devnum2devname(int num);
 extern int devname2devnum(char *name);