From 2c6143fdb0cc12997a2a09268f4797931f73947d Mon Sep 17 00:00:00 2001
From: midipix <writeonce@midipix.org>
Date: Wed, 26 Oct 2016 21:04:18 -0400
Subject: amgc_map_input(): improved error trace support.

---
 src/logic/amgc_map_input.c | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'src')

diff --git a/src/logic/amgc_map_input.c b/src/logic/amgc_map_input.c
index b4e07ea..c0d4a2b 100644
--- a/src/logic/amgc_map_input.c
+++ b/src/logic/amgc_map_input.c
@@ -35,9 +35,16 @@ int amgc_map_input(
 	if ((ret = fstat(fd,&st) < 0) && fnew)
 		close(fd);
 
+	else if ((st.st_size == 0) && fnew)
+		close(fd);
+
 	if (ret < 0)
 		return AMGC_SYSTEM_ERROR(dctx);
 
+	else if (st.st_size == 0)
+		return AMGC_CUSTOM_ERROR(
+			dctx,AMGC_ERR_SOURCE_SIZE_ZERO);
+
 	map->size = st.st_size;
 	map->addr = mmap(0,map->size,prot,MAP_PRIVATE,fd,0);
 
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