From b4273f9569cea2f23e82ba1db15c766d82757128 Mon Sep 17 00:00:00 2001
From: TuxSH <1922548+TuxSH@users.noreply.github.com>
Date: Mon, 10 Mar 2025 19:37:27 +0100
Subject: [PATCH] Fix regression introduced by latest release

As it turns out, neither f_mkdir nor fs.c function create directories recursively, only the last one
---
 arm9/source/fs.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/arm9/source/fs.c b/arm9/source/fs.c
index e693b7d2..2e248106 100644
--- a/arm9/source/fs.c
+++ b/arm9/source/fs.c
@@ -137,6 +137,7 @@ bool fileWrite(const void *buffer, const char *path, u32 size)
             return result == FR_OK && (u32)written == size;
         }
         case FR_NO_PATH:
+            // Only create the last dir in the hierarchy
             for(u32 i = 1; path[i] != 0; i++)
                 if(path[i] == '/')
                 {
@@ -178,6 +179,7 @@ bool fileCopy(const char *pathSrc, const char *pathDst, bool replace, void *tmpB
     }
     else if (res == FR_NO_PATH)
     {
+        // Only create the last dir in the hierarchy
         const char *c;
         for (c = pathDst + strlen(pathDst); *c != '/' && c >= pathDst; --c);
         if (c >= pathDst && c - pathDst <= FF_MAX_LFN && *c != '\0')
@@ -446,6 +448,11 @@ static bool backupEssentialFiles(void)
     sprintf(pathStart, "backups/%08lX/", deviceID);
     char fullPath[0x80];
 
+    // Since the other funcs in this file don't create directories recursively (only the last one),
+    // and nor does f_mkdir, create the directories anyway and ignore the result
+    f_mkdir("backups");
+    f_mkdir(pathStart);
+
     bool ok = true;
     sprintf(fullPath, "%sHWCAL0.dat", pathStart);
     ok = ok && fileCopy("nand:/ro/sys/HWCAL0.dat", fullPath, false, fileCopyBuffer, sz);