1 files changed, 104 insertions, 0 deletions
diff --git a/contrib/bmake/sigact.h b/contrib/bmake/sigact.h
new file mode 100644
index 000000000000..1dc04ba2dbdd
--- /dev/null
+++ b/contrib/bmake/sigact.h
@@ -0,0 +1,104 @@
+/* NAME:
+ *      sigact.h - sigaction et al
+ *
+ * SYNOPSIS:
+ *      #include "sigact.h"
+ *
+ * DESCRIPTION:
+ *      This header is the interface to a fake sigaction(2) 
+ *      implementation. It provides a POSIX compliant interface 
+ *      to whatever signal handling mechanisms are available.
+ *      It also provides a Signal() function that is implemented 
+ *      in terms of sigaction().
+ *      If not using signal(2) as part of the underlying 
+ *      implementation (USE_SIGNAL or USE_SIGMASK), and 
+ *      NO_SIGNAL is not defined, it also provides a signal() 
+ *      function that calls Signal(). 
+ *      
+ * SEE ALSO:
+ *      sigact.c
+ */
+/*
+ * RCSid:
+ *      $Id: sigact.h,v 1.4 2021/10/14 19:39:17 sjg Exp $
+ */
+#ifndef _SIGACT_H
+#define _SIGACT_H
+
+#include <sys/cdefs.h>
+
+/*
+ * most modern systems use void for signal handlers but
+ * not all.
+ */
+#ifndef SIG_HDLR
+# define SIG_HDLR void
+#endif
+
+/*
+ * if you want to install this header as signal.h,
+ * modify this to pick up the original signal.h
+ */
+#ifndef SIGKILL
+# include <signal.h>
+#endif
+#ifndef SIGKILL
+# include <sys/signal.h>
+#endif
+  
+#ifndef SIG_ERR
+# define SIG_ERR  (SIG_HDLR (*)())-1
+#endif
+#ifndef BADSIG
+# define BADSIG  SIG_ERR
+#endif
+    
+#ifndef SA_NOCLDSTOP
+/* we assume we need the fake sigaction */
+/* sa_flags */
+#define	SA_NOCLDSTOP	1		/* don't send SIGCHLD on child stop */
+#define SA_RESTART	2		/* re-start I/O */
+
+/* sigprocmask flags */
+#define	SIG_BLOCK	1
+#define	SIG_UNBLOCK	2
+#define	SIG_SETMASK	4
+
+/*
+ * this is a bit untidy
+ */
+#ifdef _SIGSET_T_
+typedef _SIGSET_T_ sigset_t;
+#endif
+  
+/*
+ * POSIX sa_handler should return void, but since we are
+ * implementing in terms of something else, it may
+ * be appropriate to use the normal SIG_HDLR return type
+ */
+struct sigaction
+{
+  SIG_HDLR	(*sa_handler)();
+  sigset_t	sa_mask;
+  int		sa_flags;
+};
+
+
+int	sigaction	( int /*sig*/, const struct sigaction */*act*/, struct sigaction */*oact*/ );
+int	sigaddset	( sigset_t */*mask*/, int /*sig*/ );
+int	sigdelset	( sigset_t */*mask*/, int /*sig*/ );
+int	sigemptyset	( sigset_t */*mask*/ );
+int	sigfillset	( sigset_t */*mask*/ );
+int	sigismember	( const sigset_t */*mask*/, int /*sig*/ );
+int	sigpending	( sigset_t */*set*/ );
+int	sigprocmask	( int how, const sigset_t */*set*/, sigset_t */*oset*/ );
+int	sigsuspend	( sigset_t */*mask*/ );
+	
+#ifndef sigmask
+# define sigmask(s)	(1<<((s)-1) & (32 - 1))	/* convert SIGnum to mask */
+#endif
+#if !defined(NSIG) && defined(_NSIG)
+# define NSIG _NSIG
+#endif
+#endif /* ! SA_NOCLDSTOP */
+#endif /* _SIGACT_H */