init: modify fixed misc file about issue

Signed-off-by: Nxionglei6 <xionglei6@huawei.com>
Change-Id: I07a14bb637e1c09022e0c79fb6de839297048987

interfaces/innerkits/fs_manager/fstab.c

@@ -288,6 +288,23 @@ FstabItem *FindFstabItemForPath(Fstab fstab, const char *path)
     return item;
 }
 
+int GetPartitionFilePath(const char *filePath, const char *partitionName, char *partitionPath, size_t pathSize)
+{
+    Fstab *fstab = NULL;
+    FstabItem *miscItem = NULL;
+    if ((fstab = ReadFstabFromFile(filePath, false)) != NULL) {
+        miscItem = FindFstabItemForMountPoint(*fstab, partitionName);
+        INIT_ERROR_CHECK(miscItem != NULL, ReleaseFstab(fstab); return -1, "Failed to find misc partition");
+    } else {
+        FSMGR_LOGE("Failed to ReadFstabFromFile");
+        return -1;
+    }
+    int ret = strcpy_s(partitionPath, pathSize, miscItem->deviceName);
+    INIT_ERROR_CHECK(ret == EOK, ReleaseFstab(fstab); return -1, "Failed to copy misc device name");
+    ReleaseFstab(fstab);
+    return 0;
+}
+
 static const struct MountFlags mountFlags[] = {
     { "noatime", MS_NOATIME },
     { "noexec", MS_NOEXEC },
@@ -382,4 +399,4 @@ unsigned long GetMountFlags(char *mountFlag, char *fsSpecificData, size_t fsSpec
 #if __cplusplus
 }
 #endif
-#endif
\ No newline at end of file
+#endif