start unifying help handling

1 files changed, 26 insertions, 0 deletions

diff --git a/src/_usage.c b/src/_usage.c
new file mode 100644
index 00000000..89258185
--- /dev/null
+++ b/src/_usage.c
@@ -0,0 +1,26 @@
+/*
+ * @file _usage.c
+ * @brief standardize help/usage output across all our programs
+ * @internal
+ *
+ * Copyright 2007 Gentoo Foundation
+ * Released under the GPLv2
+ */
+
+#ifndef APPLET
+# error you forgot to define APPLET
+#endif
+
+static void usage (int exit_status)
+{
+	int i;
+	printf ("Usage: " APPLET " [options]\n\n");
+	printf ("Options: [" getoptstring "]\n");
+	for (i = 0; longopts[i].name; ++i)
+		printf ("  -%c, --%s\n", longopts[i].val, longopts[i].name);
+	exit (exit_status);
+}
+
+#define case_RC_COMMON_GETOPT \
+	case 'h': usage (EXIT_SUCCESS); \
+	default:  usage (EXIT_FAILURE);