Added routine to check signals.

util/led/error.c

@@ -0,0 +1,71 @@
+#ifndef lint
+static char rcsid[] = "$Header$";
+#endif
+
+#include <stdio.h>
+#include <signal.h>
+#include "out.h"
+#include "const.h"
+
+static short	nerrors = 0;
+
+static
+stop()
+{
+	extern char	*outputname;
+
+	if (nerrors)
+		unlink(outputname);
+
+	exit(nerrors);
+}
+
+trap_signals()
+{
+	static int	trap_them[] = { SIGHUP, SIGINT, SIGQUIT, SIGTERM, 0 };
+	register int	*ip;
+
+	for (ip = trap_them; *ip; ip++)
+		if (signal(*ip, stop) == SIG_IGN)
+			signal(*ip, SIG_IGN);	/* Oops, reset. */
+}
+
+/* VARARGS1 */
+fatal(format, a1, a2, a3, a4)
+	char	*format;
+{
+	nerrors++;
+	diag("fatal", format, a1, a2, a3, a4);
+	stop();
+}
+
+/* VARARGS1 */
+warning(format, a1, a2, a3, a4)
+	char	*format;
+{
+	diag("warning", format, a1, a2, a3, a4);
+}
+
+/* VARARGS1 */
+error(format, a1, a2, a3, a4)
+	char	*format;
+{
+	nerrors++;
+	diag("error", format, a1, a2, a3, a4);
+}
+
+static
+diag(tail, format, a1, a2, a3, a4)
+	char	*tail;
+	char	*format;
+{
+	extern char	*progname, *archname, *modulname; 
+
+	fprintf(stderr, "%s: ", progname);
+	if (archname)
+		fprintf(stderr, "%s: ", archname);
+	if (modulname)
+		fprintf(stderr, "%s: ", modulname);
+	fprintf(stderr, format, a1, a2, a3, a4);
+	fprintf(stderr, " (%s)\n", tail);
+}