From 0b7bf0e0a486da6be7c5dde742a80c1138f9cc89 Mon Sep 17 00:00:00 2001
From: abushwang <abushwangs@gmail.com>
Date: Tue, 7 Mar 2023 20:16:20 +0800
Subject: rt: fix shm_open not set ENAMETOOLONG when name exceeds
 {_POSIX_PATH_MAX}

according to man-pages-posix-2017, shm_open() function may fail if the length
of the name argument exceeds {_POSIX_PATH_MAX} and set ENAMETOOLONG

Signed-off-by: abushwang <abushwangs@gmail.com>
Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
---
 rt/shm_open.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

(limited to 'rt')

diff --git a/rt/shm_open.c b/rt/shm_open.c
index 6c1f4d604f..fc1dc96bb4 100644
--- a/rt/shm_open.c
+++ b/rt/shm_open.c
@@ -30,9 +30,10 @@ int
 __shm_open (const char *name, int oflag, mode_t mode)
 {
   struct shmdir_name dirname;
-  if (__shm_get_name (&dirname, name, false) != 0)
+  int ret =__shm_get_name (&dirname, name, false);
+  if (ret != 0)
     {
-      __set_errno (EINVAL);
+      __set_errno (ret);
       return -1;
     }
 
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