--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/c/setprogname/setprogname.c	Mon Jul 15 21:05:00 2019 +0200
@@ -0,0 +1,45 @@
+/*
+ * setprogname.c -- get or set the program name
+ *
+ * Copyright (c) 2011-2019 David Demelier <markand@malikania.fr>
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+/*
+ * Do not return NULL if the developer didn't call setprogname to
+ * prevent useless segfault.
+ */
+static const char *g_pname = "";
+
+void
+setprogname(const char *progname)
+{
+	const char *p;
+
+	/* Seek last / or \ on windows */
+	if ((p = strrchr(progname, '/')) || (p = strrchr(progname, '\\')))
+		g_pname = &p[1];
+	else
+		g_pname = progname;
+}
+
+const char *
+getprogname(void)
+{
+	return g_pname;
+}