dont mount rootfs

stepmania/stepmania#2184

Author: poco0317

src/Etterna/Globals/StepMania.cpp

@@ -992,13 +992,6 @@ sm_main(int argc, char* argv[])
 	FILEMAN = new RageFileManager(argv[0]);
 	FILEMAN->Mount("dir", Core::Platform::getAppDirectory(), "/");
 
-#ifdef __unix__
-	/* Mount the root filesystem, so we can read files in /proc, /etc, and so
-	 * on. This is /rootfs, not /root, to avoid confusion with root's home
-	 * directory. */
-	FILEMAN->Mount("dir", "/", "/rootfs");
-#endif
-
 	// load preferences and mount any alternative trees.
 	PREFSMAN = new PrefsManager;
 

src/arch/Sound/ALSA9Dynamic.cpp

@@ -1,6 +1,7 @@
 #include "Etterna/Globals/global.h"
 
 #include <dlfcn.h>
+#include <sys/stat.h>
 
 #define ALSA_PCM_NEW_HW_PARAMS_API
 #define ALSA_PCM_NEW_SW_PARAMS_API
@@ -31,7 +32,8 @@ LoadALSA()
 	 * know if anyone actually does that, though: they're often configured to
 	 * load snd (the core module) if ALSA devices are accessed, but hardware
 	 * drivers are typically loaded on boot. */
-	if (!IsADirectory("/rootfs/proc/asound/"))
+	struct stat st;
+	if (stat("/proc/asound/", &st) == -1 || !(st.st_mode & S_IFDIR))
 		return "/proc/asound/ does not exist";
 
 	ASSERT(Handle == NULL);

src/arch/Sound/ALSA9Helpers.cpp

@@ -5,6 +5,8 @@
 #include "ALSA9Dynamic.h"
 #include "Etterna/Singletons/PrefsManager.h"
 
+#include <fstream>
+#include <string>
 #include <algorithm>
 
 /* int err; must be defined before using this macro */
@@ -160,10 +162,11 @@ Alsa9Buf::GetSoundCardDebugInfo()
 		return;
 	done = true;
 
-	if (DoesFileExist("/rootfs/proc/asound/version")) {
-		std::string sVersion;
-		GetFileContents("/rootfs/proc/asound/version", sVersion, true);
-		Locator::getLogger()->info("ALSA: {}", sVersion.c_str());
+	std::ifstream f("/proc/asound/version");
+	if (f.good()) {
+		std::string version;
+		std::getline(f, version);
+		Locator::getLogger()->info("ALSA: {}", version.c_str());
 	}
 
 	InitializeErrorHandler();

src/arch/Sound/RageSoundDriver_OSS.cpp

@@ -17,6 +17,7 @@
 #include <sys/ioctl.h>
 #include <sys/soundcard.h>
 #include <sys/select.h>
+#include <sys/stat.h>
 
 REGISTER_SOUND_DRIVER_CLASS(OSS);
 
@@ -145,8 +146,8 @@ RageSoundDriver_OSS::CheckOSSVersion(int fd)
 	 */
 #ifndef FORCE_OSS
 #define ALSA_SNDRV_OSS_VERSION ((3 << 16) | (8 << 8) | (1 << 4) | (0))
-	if (version == ALSA_SNDRV_OSS_VERSION &&
-		IsADirectory("/rootfs/proc/asound"))
+	struct stat st;
+	if( version == ALSA_SNDRV_OSS_VERSION && stat("/proc/asound", &st) && (st.st_mode & S_IFDIR) )
 		return "RageSoundDriver_OSS: ALSA detected.  ALSA OSS emulation is "
 			   "buggy; use ALSA natively.";
 #endif