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-rw-r--r--sysdeps/unix/sysv/linux/s390/bits/fcntl.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/s390/bits/fcntl.h b/sysdeps/unix/sysv/linux/s390/bits/fcntl.h
index e951b631cd..ad3ef420a1 100644
--- a/sysdeps/unix/sysv/linux/s390/bits/fcntl.h
+++ b/sysdeps/unix/sysv/linux/s390/bits/fcntl.h
@@ -230,6 +230,10 @@ extern int sync_file_range (int __fd, __off64_t __from, __off64_t __to,
 extern int splice (int __fdin, int __fdout, size_t __len, unsigned int __flags)
     __THROW;
 
+/* In-kernel implementation of tee for pipe buffers.  */
+extern int tee (int __fdin, int __fdout, size_t __len, unsigned int __flags)
+    __THROW;
+
 #endif
 
 __END_DECLS