1 files changed, 9 insertions, 0 deletions
diff --git a/Godeps/_workspace/src/github.com/ethereum/ethash/src/libethash/io_posix.c b/Godeps/_workspace/src/github.com/ethereum/ethash/src/libethash/io_posix.c
index 7f03d5482..c9a17d845 100644
--- a/Godeps/_workspace/src/github.com/ethereum/ethash/src/libethash/io_posix.c
+++ b/Godeps/_workspace/src/github.com/ethereum/ethash/src/libethash/io_posix.c
@@ -26,6 +26,8 @@
 #include <libgen.h>
 #include <stdio.h>
 #include <unistd.h>
+#include <stdlib.h>
+#include <pwd.h>
 
 FILE* ethash_fopen(char const* file_name, char const* mode)
 {
@@ -89,6 +91,13 @@ bool ethash_get_default_dirname(char* strbuf, size_t buffsize)
 	static const char dir_suffix[] = ".ethash/";
 	strbuf[0] = '\0';
 	char* home_dir = getenv("HOME");
+	if (!home_dir || strlen(home_dir) == 0)
+	{
+		struct passwd* pwd = getpwuid(getuid());
+		if (pwd)
+			home_dir = pwd->pw_dir;
+	}
+	
 	size_t len = strlen(home_dir);
 	if (!ethash_strncat(strbuf, buffsize, home_dir, len)) {
 		return false;