fs fixes and clean

src/Core/PS4/HLE/ErrorCodes.h

@@ -6,6 +6,7 @@ constexpr int SCE_KERNEL_ERROR_ENOMEM = 0x8002000c;        // Insufficient memor
 constexpr int SCE_KERNEL_ERROR_EFAULT = 0x8002000e;  // Invalid address pointer
 constexpr int SCE_KERNEL_ERROR_ENOTDIR = 0x80020014;
 constexpr int SCE_KERNEL_ERROR_EINVAL = 0x80020016;        // null or invalid states
+constexpr int SCE_KERNEL_ERROR_EMFILE = 0x80020018;        // Limit on the number of file descriptors that can be open has been reached
 constexpr int SCE_KERNEL_ERROR_EAGAIN = 0x80020023;        // Memory cannot be allocated
 constexpr int SCE_KERNEL_ERROR_ENAMETOOLONG = 0x8002003f;  // character strings exceeds valid size
 

src/Emulator/HLE/Libraries/LibKernel/FileSystem/file_system.cpp

@@ -1,10 +1,11 @@
 #include "file_system.h"
-#include <debug.h>
-#include <Util/log.h>
-#include <Emulator/Util/singleton.h>
-#include "Emulator/Host/fs.h"
-#include <Core/PS4/HLE/ErrorCodes.h>
 
+#include <Core/PS4/HLE/ErrorCodes.h>
+#include <Emulator/Util/singleton.h>
+#include <Util/log.h>
+#include <debug.h>
+
+#include "Emulator/Host/fs.h"
 
 namespace Emulator::HLE::Libraries::LibKernel::FileSystem {
 constexpr bool log_file_fs = true;  // disable it to disable logging
@@ -13,21 +14,24 @@ int PS4_SYSV_ABI sceKernelOpen(const char* path, int flags, u16 mode) {
     LOG_INFO_IF(log_file_fs, "sceKernelOpen path = {} flags = {} mode = {}\n", path, log_hex_full(flags), log_hex_full(mode));
 
     bool isDirectory = (flags & SCE_KERNEL_O_DIRECTORY) != 0;
-    bool createFileOrDir = (flags & SCE_KERNEL_O_CREAT) != 0;
+    bool create = (flags & SCE_KERNEL_O_CREAT) != 0;
 
     auto* h = singleton<Emulator::Host::Fs::HandleTable>::instance();
     auto* mnt = singleton<Emulator::Host::Fs::MntPoints>::instance();
+    u32 handle = 0;
+    if (h->createHandle().has_value()) {
+        handle = h->createHandle().value();
+    } else {
+        return SCE_KERNEL_ERROR_EMFILE;  // file descriptors is full error(?)
+    }
+    Emulator::Host::Fs::File* file = h->getFile(handle);
 
-    u32 handle = h->createHandle().value();//TODO check if overflows
-	
-	Emulator::Host::Fs::File file = h->getFile(handle);
-
-	file.guest_path = path;
+    file->guest_path = path;
     if (isDirectory) {
-        file.host_path = mnt->getHostDirectory(path);
-        if (!std::filesystem::exists(file.host_path)) { //directory doesn't exist 
-			if (createFileOrDir) { //if we have a create flag create it               
-                if (std::filesystem::create_directories(file.host_path)) {
+        file->host_path = mnt->getHostDirectory(path);
+        if (!std::filesystem::is_directory(file->host_path)) {  // directory doesn't exist
+            if (create) {                                      // if we have a create flag create it
+                if (std::filesystem::create_directories(file->host_path)) {
                     return handle;
                 } else {
                     return SCE_KERNEL_ERROR_ENOTDIR;
@@ -40,12 +44,12 @@ int PS4_SYSV_ABI sceKernelOpen(const char* path, int flags, u16 mode) {
     return handle;
 }
 
-int PS4_SYSV_ABI sceKernelClose(int d) {
-    LOG_INFO_IF(log_file_fs, "sceKernelClose descriptor = {}\n", d);
+int PS4_SYSV_ABI sceKernelClose(int handle) {
+    LOG_INFO_IF(log_file_fs, "sceKernelClose descriptor = {}\n", handle);
     auto* h = singleton<Emulator::Host::Fs::HandleTable>::instance();
-    Emulator::Host::Fs::File file = h->getFile(d);
-    file.valid = false;
-    h->freeHandle(d);
+    Emulator::Host::Fs::File* file = h->getFile(handle);
+    file->valid = false;
+    h->freeHandle(handle);
     return SCE_OK;
 }
 }  // namespace Emulator::HLE::Libraries::LibKernel::FileSystem

src/Emulator/HLE/Libraries/LibKernel/FileSystem/file_system.h

@@ -7,6 +7,6 @@ constexpr u32 SCE_KERNEL_O_CREAT = 0x0200;
 constexpr u32 SCE_KERNEL_O_DIRECTORY = 0x00020000;
 
 int PS4_SYSV_ABI sceKernelOpen(const char *path, int flags, /* SceKernelMode*/ u16 mode);
-int PS4_SYSV_ABI sceKernelClose(int d);
+int PS4_SYSV_ABI sceKernelClose(int handle);
 
 }  // namespace Emulator::HLE::Libraries::LibKernel::FileSystem

src/Emulator/Host/fs.cpp

@@ -1,4 +1,5 @@
 #include "fs.h"
+
 #include <algorithm>
 
 namespace Emulator::Host::Fs {
@@ -12,22 +13,21 @@ void MntPoints::mount(const std::string& host_folder, const std::string& guest_f
     m_mnt_pairs.push_back(pair);
 }
 void MntPoints::unMount(const std::string& path) {}
-void MntPoints::unMountAll() {}
+void MntPoints::unmountAll() {}
 std::string MntPoints::getHostDirectory(const std::string& guest_directory) {
     Lib::LockMutexGuard lock(m_mutex);
-    for (auto& pair : m_mnt_pairs)
-    {
+    for (auto& pair : m_mnt_pairs) {
         if (pair.guest_path.starts_with(guest_directory)) {
             return pair.host_path + guest_directory;
         }
     }
-    //hack for relative path , get app0 and assuming it goes from there
+    // hack for relative path , get app0 and assuming it goes from there
     for (auto& pair : m_mnt_pairs) {
         if (pair.guest_path.starts_with("/app0")) {
             std::replace(pair.host_path.begin(), pair.host_path.end(), '\\', '/');
             return pair.host_path + guest_directory;
         }
     }
-	return std::string(); 
+    return "";
 }
 }  // namespace Emulator::Host::Fs

src/Emulator/Host/fs.h

@@ -23,7 +23,7 @@ class MntPoints {
     virtual ~MntPoints() {}
     void mount(const std::string& host_folder, const std::string& guest_folder);
     void unMount(const std::string& path);
-    void unMountAll();
+    void unmountAll();
     std::string getHostDirectory(const std::string& guest_directory);
 
   private:
@@ -88,7 +88,7 @@ class HandleTable {
         return handle;
     }
 
-    File getFile(u32 handle) { return files[handle]; }
+    File* getFile(u32 handle) { return &files[handle]; }
 
     void freeHandle(u32 handle) {
         if (handle >= files.size()) {