1 files changed, 55 insertions, 0 deletions
diff --git a/src/rc/_usage.c b/src/rc/_usage.c
new file mode 100644
index 0000000..b079e32
--- /dev/null
+++ b/src/rc/_usage.c
@@ -0,0 +1,55 @@
+/* 
+ * Copyright 2007 Roy Marples
+ * All rights reserved
+
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+__attribute__ ((__noreturn__))
+static void usage (int exit_status)
+{
+	const char * const has_arg[] = { "", "<arg>", "[arg]" };
+	int i;
+
+	printf ("Usage: %s [options] ", applet);
+#ifdef extraopts
+	printf (extraopts);
+#endif
+	printf ("\n\nOptions: [" getoptstring "]\n");
+	for (i = 0; longopts[i].name; ++i) {
+		int len = printf ("  -%c, --%s %s", longopts[i].val, longopts[i].name,
+		                  has_arg[longopts[i].has_arg]);
+
+		char *lo = xstrdup (longopts_help[i]);
+		char *p = lo;
+		char *token;
+
+		while ((token = strsep (&p, "\n"))) {
+			while (++len < 37)
+				printf (" ");
+			puts (token);
+			len = 0;
+		}
+		free (lo);
+	}
+	exit (exit_status);
+}