From ed511efbea44b627752d044cc65256b0591c0ae7 Mon Sep 17 00:00:00 2001
From: Jakob Kaivo <jkk@ung.org>
Date: Mon, 15 Jul 2019 11:49:12 -0400
Subject: add symbolic error name to output

---
 strerror.c | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/strerror.c b/strerror.c
index e7b1695..0e0359b 100644
--- a/strerror.c
+++ b/strerror.c
@@ -1,7 +1,18 @@
+#define _XOPEN_SOURCE 700
 #include <string.h>
 #include <stdio.h>
 #include <stdlib.h>
 
+#include "strerror.h"
+
+const char *errname(int err)
+{
+	if (err < sizeof(errlist) / sizeof(errlist[0]) && errlist[err]) {
+		return errlist[err];
+	}
+	return "-";
+}
+
 int main(int argc, char *argv[])
 {
 	int n = 1;
@@ -13,7 +24,7 @@ int main(int argc, char *argv[])
 
 	do {
 		int err = atoi(argv[n]);
-		printf("%d: %s\n", err, strerror(err));
+		printf("%d: %s [%s]\n", err, strerror(err), errname(err));
 	} while (argv[++n]);
 
 	return 0;
-- 
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