+/* CC0 (Public domain) - see LICENSE file for details */
#ifndef CCAN_ERR_H
#define CCAN_ERR_H
#include "config.h"
#if HAVE_ERR_H
#include <err.h>
+
+/* This is unnecessary with a real err.h. See below */
+#define err_set_progname(name) ((void)name)
+
#else
#include <ccan/compiler/compiler.h>
+/**
+ * err_set_progname - set the program name
+ * @name: the name to use for err, errx, warn and warnx
+ *
+ * The BSD err.h calls know the program name, unfortunately there's no
+ * portable way for the CCAN replacements to do that on other systems.
+ *
+ * If you don't call this with argv[0], it will be "unknown program".
+ *
+ * Example:
+ * err_set_progname(argv[0]);
+ */
+void err_set_progname(const char *name);
+
/**
* err - exit(eval) with message based on format and errno.
* @eval: the exit code