io.c: check socket on other than linux

* io.c (nogvl_copy_stream_sendfile): check socket on other than
  linux, as sendfile(2) on non-socket fd works only on linux.
  [Feature #9427]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@44750 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 4 insertions, 0 deletions

diff --git a/io.c b/io.c
index 00f9abc2c5..0020f4704a 100644
--- a/io.c
+++ b/io.c
@@ -10062,6 +10062,10 @@ nogvl_copy_stream_sendfile(struct copy_stream_struct *stp)
         stp->error_no = errno;
         return -1;
     }
+#ifndef __linux__
+    if ((dst_stat.st_mode & S_IFMT) != S_IFSOCK)
+	return 0;
+#endif
 
     src_offset = stp->src_offset;
     use_pread = src_offset != (off_t)-1;