glass	2017-12-22 17:47:39 +0900 (Fri, 22 Dec 2017)

  New Revision: 61412

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=61412

  Log:
    io.c: ignore EPERM
    
    * io.c (nogvl_copy_file_range): ignore EPERM and fallback to
      sendfile(2) or read/write. copy_file_range(2) may not exist
      even if __NR_copy_file_range is defined in the build environment.
      [Bug #14207]

  Modified files:
    trunk/io.c
Index: io.c
===================================================================
--- io.c	(revision 61411)
+++ io.c	(revision 61412)
@@ -10783,6 +10783,8 @@ nogvl_copy_file_range(struct copy_stream https://github.com/ruby/ruby/blob/trunk/io.c#L10783
 	}
         switch (errno) {
 	  case EINVAL:
+	  case EPERM: /* copy_file_range(2) doesn't exist (may happen in
+			 docker container) */
 #ifdef ENOSYS
 	  case ENOSYS:
 #endif

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