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-rw-r--r--include/unistd.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/include/unistd.h b/include/unistd.h
index 017563c1ac..cc5cfcc518 100644
--- a/include/unistd.h
+++ b/include/unistd.h
@@ -144,4 +144,8 @@ extern void __exit_thread (int val) __attribute__ ((noreturn));
 /* Internal name for fork function.  */
 extern __pid_t __libc_fork (void);
 
+/* Suspend the process until a signal arrives.
+   This always returns -1 and sets `errno' to EINTR.  */
+extern int __libc_pause (void);
+
 #endif