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-rw-r--r--support/xsignal.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/support/xsignal.h b/support/xsignal.h
index 3dc0d9d5ce..3087ed0082 100644
--- a/support/xsignal.h
+++ b/support/xsignal.h
@@ -24,6 +24,14 @@
 
 __BEGIN_DECLS
 
+/* The following functions call the corresponding libc functions and
+   terminate the process on error.  */
+
+void xraise (int sig);
+sighandler_t xsignal (int sig, sighandler_t handler);
+void xsigaction (int sig, const struct sigaction *newact,
+                 struct sigaction *oldact);
+
 /* The following functions call the corresponding libpthread functions
    and terminate the process on error.  */