COPKGManager: add possibilty to check required size before install package

data/locale/deutsch.locale

@@ -1867,6 +1867,7 @@ opkg.failure.upgrade Upgrade fehlgeschlagen
 opkg.install.local.package Installiere lokales Paket
 opkg.messagebox.reinstall %s erneut installieren?
 opkg.messagebox.remove %s entfernen?
+opkg.messagebox.size.error Nicht genügend freier Speicher für Paketinstallation verfügbar!
 opkg.messagebox.updates.available Aktualisierungen verfügbar!
 opkg.success.install Installation erfolgreich, Neustart von Neutrino kann erforderlich sein.
 opkg.title Paketverwaltung

data/locale/english.locale

@@ -1867,6 +1867,7 @@ opkg.failure.upgrade Upgrade failed
 opkg.install.local.package Install local package
 opkg.messagebox.reinstall Re-install %s?
 opkg.messagebox.remove Remove %s?
+opkg.messagebox.size.error Not enough free memory available for this package!
 opkg.messagebox.updates.available Updates available!
 opkg.success.install Install successful, restart of Neutrino might be required.
 opkg.title Package Management

data/locale/nederlands.locale

@@ -1758,6 +1758,7 @@ opkg.failure.upgrade Upgrade mislukt
 opkg.install.local.package Installeer lokale pakket
 opkg.messagebox.reinstall Herinstalleer %s?
 opkg.messagebox.remove Wissen%s?
+opkg.messagebox.size.error Onvoldoende geheugen beschikbaar voor dit pakket!
 opkg.messagebox.updates.available Updates beschikbare!
 opkg.success.install installatie succesvol, herstart van Neutrino mogelijk vereist.
 opkg.title Pakket management

data/locale/slovak.locale

@@ -1848,6 +1848,7 @@ opkg.failure.upgrade Upgrade zlyhalo
 opkg.install.local.package Nainštalujte miestne balíček
 opkg.messagebox.reinstall Preinštalovať %s?
 opkg.messagebox.remove Odstrániť %s?
+opkg.messagebox.size.error Nie je dostatok voľnej pamäte pre tento balík!
 opkg.messagebox.updates.available Aktualizácia k dispozícii!
 opkg.success.install Inštalácia v poriadku, reštart Neutrina bude žiadúci.
 opkg.title Správa balíčkov

src/gui/opkg_manager.cpp

@@ -48,7 +48,7 @@
 #include <system/debug.h>
 #include <system/helpers.h>
 #include <unistd.h>
-
+#include <sys/vfs.h>
 #include <poll.h>
 #include <fcntl.h>
 #include <alloca.h>
@@ -190,12 +190,38 @@ int COPKGManager::exec(CMenuTarget* parent, const string &actionKey)
 				return res;
 			force = "--force-reinstall ";
 		}
-		int r = execCmd(pkg_types[OM_INSTALL] + force + actionKey, true, true);
 
-		if (r) {
-			showError(g_Locale->getText(LOCALE_OPKG_FAILURE_INSTALL), strerror(errno), pkg_types[OM_INSTALL] + force + actionKey);
-		} else
-			installed = true;
+		//get package size
+		string s_pkgsize = getPkgInfo(actionKey, "Size");
+		std::istringstream s(s_pkgsize);
+		u_int64_t pkg_size;
+		s >> pkg_size;
+
+		//get available size
+		//TODO: Check writability!
+		struct statfs root_fs;
+		statfs("/",&root_fs);
+		u_int64_t free_size = root_fs.f_bfree*root_fs.f_bsize;
+		dprintf(DEBUG_INFO,  "[COPKGManager] [%s - %d] Package: %s [package size=%lld (free size: %lld)]\n", __func__, __LINE__, actionKey.c_str(), pkg_size, free_size);
+
+		//only for sure, it's more secure for users to abort installation if is available size too small
+		//TODO: Package size is not really the same like required/recommended size, because of unknown compression factor, some possible options like cache, different tmp-dir size eg. are still not considered.
+		u_int64_t rec_size = pkg_size/2*3;
+		if (free_size < rec_size){
+			dprintf(DEBUG_NORMAL,  "[COPKGManager] [%s - %d]  WARNING: size check freesize=%lld required size=%lld (recommended: %lld)\n", __func__, __LINE__, free_size, pkg_size, rec_size);
+			DisplayErrorMessage(g_Locale->getText(LOCALE_OPKG_MESSAGEBOX_SIZE_ERROR));
+		}else{
+			string cmd = pkg_types[OM_INSTALL] + force + actionKey;
+			int r = execCmd(cmd, true, true);
+			string cur_version = getPkgInfo(actionKey, "Version");
+			dprintf(DEBUG_NORMAL, "[COPKGManager] [%s - %d]  %s: current version = %s\n", __func__, __LINE__, actionKey.c_str(), cur_version.c_str());
+			if (r){
+				showError(g_Locale->getText(LOCALE_OPKG_FAILURE_INSTALL), strerror(errno), cmd);
+			}else{
+				installed = true;
+			}
+		}
+
 		refreshMenu();
 	}
 	return res;

src/system/locals.h

@@ -1894,6 +1894,7 @@ typedef enum
 	LOCALE_OPKG_INSTALL_LOCAL_PACKAGE,
 	LOCALE_OPKG_MESSAGEBOX_REINSTALL,
 	LOCALE_OPKG_MESSAGEBOX_REMOVE,
+	LOCALE_OPKG_MESSAGEBOX_SIZE_ERROR,
 	LOCALE_OPKG_MESSAGEBOX_UPDATES_AVAILABLE,
 	LOCALE_OPKG_SUCCESS_INSTALL,
 	LOCALE_OPKG_TITLE,

src/system/locals_intern.h

@@ -1894,6 +1894,7 @@ const char * locale_real_names[] =
 	"opkg.install.local.package",
 	"opkg.messagebox.reinstall",
 	"opkg.messagebox.remove",
+	"opkg.messagebox.size.error",
 	"opkg.messagebox.updates.available",
 	"opkg.success.install",
 	"opkg.title",