mdadm/lib: Define a new helper function is_dev_alived

The function is used to check if one member disk is alive.

Signed-off-by: Xiao Ni <xni@redhat.com>
Acked-by: Mariusz Tkaczyk <mariusz.tkaczyk@linux.intel.com>
Signed-off-by: Jes Sorensen <jsorensen@fb.com>

1 files changed, 11 insertions, 0 deletions

diff --git a/lib.c b/lib.c
index 76d1fbb9..7e3e3d47 100644
--- a/lib.c
+++ b/lib.c
@@ -27,6 +27,17 @@
 #include	<ctype.h>
 #include	<limits.h>
 
+bool is_dev_alive(char *path)
+{
+	if (!path)
+		return false;
+
+	if (access(path, R_OK) == 0)
+		return true;
+
+	return false;
+}
+
 /* This fill contains various 'library' style function.  They
  * have no dependency on anything outside this file.
  */