From 1a2cdf20c9c47ddacb6370431f676fd55bfbfebb Mon Sep 17 00:00:00 2001
From: Christophe Lyon <christophe.lyon@st.com>
Date: Wed, 4 Jul 2018 18:09:20 +0200
Subject: Fix shm_open posix compliance error code
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Handle EISDIR in shm_open like glibc does, and set EINVAL.

	* librt/shm.c (shm_open): Handle EISDIR error.

Signed-off-by: Mickaël Guêné <mickael.guene@st.com>
Signed-off-by: Christophe Lyon <christophe.lyon@st.com>
---
 librt/shm.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/librt/shm.c b/librt/shm.c
index 40e69fa2e..79c98a35b 100644
--- a/librt/shm.c
+++ b/librt/shm.c
@@ -84,6 +84,9 @@ int shm_open(const char *name, int oflag, mode_t mode)
 		 */
 	}
 #endif
+    if (fd < 0 && errno == EISDIR)
+        /* EISDIR is not valid for shm_open, replace it with EINVAL as glibc.  */
+        __set_errno (EINVAL);
 	free(shm_name); /* doesn't affect errno */
 	return fd;
 }
-- 
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