From 6836f424c5ff95d0114a426010b22254804bc9a3 Mon Sep 17 00:00:00 2001
From: Tomoyuki Sahara <tsahara@iij.ad.jp>
Date: Fri, 19 May 2017 17:14:43 +0900
Subject: "open" error message should include pathname.  fixes #77.

---
 src/io.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/io.c b/src/io.c
index dd030b87a..51a659f0e 100644
--- a/src/io.c
+++ b/src/io.c
@@ -556,6 +556,7 @@ mrb_io_s_sysclose(mrb_state *mrb, mrb_value klass)
 int
 mrb_cloexec_open(mrb_state *mrb, const char *pathname, mrb_int flags, mrb_int mode)
 {
+  mrb_value emsg;
   int fd, retry = FALSE;
 
 #ifdef O_CLOEXEC
@@ -576,7 +577,10 @@ reopen:
         goto reopen;
       }
     }
-    mrb_sys_fail(mrb, "open");
+
+    emsg = mrb_format(mrb, "open %S", mrb_str_new_cstr(mrb, pathname));
+    mrb_str_modify(mrb, mrb_str_ptr(emsg));
+    mrb_sys_fail(mrb, RSTRING_PTR(emsg));
   }
 
   if (fd <= 2) {
-- 
cgit v1.2.3