From 298665593093130d025e5c226c4647246712f7f0 Mon Sep 17 00:00:00 2001
From: Dmytro Bogovych <dmytro.bogovych@gmail.com>
Date: Wed, 3 Jun 2020 12:33:48 +0300
Subject: [PATCH] - check disk free space on Linuxes

---
 src/engine/helper/HL_File.cpp | 17 +++++++++++++++++
 src/engine/helper/HL_File.h   |  4 ++++
 2 files changed, 21 insertions(+)

diff --git a/src/engine/helper/HL_File.cpp b/src/engine/helper/HL_File.cpp
index 64f982ed..c042a93d 100644
--- a/src/engine/helper/HL_File.cpp
+++ b/src/engine/helper/HL_File.cpp
@@ -3,6 +3,8 @@
 
 #if defined(TARGET_LINUX) || defined(TARGET_OSX)
 # include <unistd.h>
+# include <sys/statvfs.h>
+# include <memory.h>
 #endif
 
 bool FileHelper::exists(const std::string& s)
@@ -88,3 +90,18 @@ std::string FileHelper::mergePathes(const std::string& s1, const std::string& s2
 
     return result;
 }
+
+// Returns free space on volume for path
+size_t FileHelper::getFreespace(const std::string& path)
+{
+    size_t r = static_cast<size_t>(-1);
+
+#if defined(TARGET_LINUX)
+    struct statvfs stats; memset(&stats, 0, sizeof stats);
+
+    int retcode = statvfs(path.c_str(), &stats);
+    if (retcode == 0)
+        r = stats.f_bfree * stats.f_bsize;
+#endif
+    return r;
+}
diff --git a/src/engine/helper/HL_File.h b/src/engine/helper/HL_File.h
index 0911ac82..4616d8dd 100644
--- a/src/engine/helper/HL_File.h
+++ b/src/engine/helper/HL_File.h
@@ -19,6 +19,10 @@ public:
 
     static std::string addTrailingSlash(const std::string& s);
     static std::string mergePathes(const std::string& s1, const std::string& s2);
+
+    // Returns free space on volume for path
+    // Works for Linux only. For other systems (size_t)-1 is returned (for errors too)
+    static size_t getFreespace(const std::string& path);
 };
 
 #endif