From 69ee9b2cb169ee843ac9e209f919d088499152f7 Mon Sep 17 00:00:00 2001
From: Rich Felker <dalias@aerifal.cx>
Date: Sat, 18 May 2013 10:20:42 -0400
Subject: [PATCH] make err.h functions print __progname

patch by Strake. previously is was not feasible to duplicate this
functionality of the functions these were modeled on, since argv[0]
was not saved at program startup, but now that it's available it's
easy to use.
---
 src/legacy/err.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/legacy/err.c b/src/legacy/err.c
index 0f748538..7b167b36 100644
--- a/src/legacy/err.c
+++ b/src/legacy/err.c
@@ -3,14 +3,18 @@
 #include <stdarg.h>
 #include <stdlib.h>
 
+extern char *__progname;
+
 void vwarn(const char *fmt, va_list ap)
 {
+	fprintf (stderr, "%s: ", __progname);
 	if (fmt) vfprintf(stderr, fmt, ap);
 	perror("");
 }
 
 void vwarnx(const char *fmt, va_list ap)
 {
+	fprintf (stderr, "%s: ", __progname);
 	if (fmt) vfprintf(stderr, fmt, ap);
 	putc('\n', stderr);
 }
-- 
2.25.1