执行malloc后将字符串传递给函数

这是我主要的C函数中的代码。

char *filename;            

filename = malloc(2001); //if I don't do this step it gives me an error

filename = ListDirectoryContents("test_data\\tmp");//this returns a string  for filename

printf("filename : %s ", filename);//value of filename is displayed which is an address and is NOT NULL OR EMPTY

copyObjectFileInINfolder(filename, logger);//here I am passing the filename to this function where I am getting the error

好的，现在我要尝试将字符串文件名传递到函数中（在函数中，文件名的变量是对象）

void copyObjectFileInINfolder(char *object, char* logger2);
{
        char source[500];
        char destination[500];
        char cmd[1000];
        printf("\nobject : 123%s123\n", object);//Here the out put I see is "object : 123123"
        printf("\nlogger : %s\n", logger2);

         if(flag ==2)//for windows
         {      
                  //object +=14;
                  printf("\nobject : %s\n", object););//Here the out put I see is "object : "

                  sprintf(source, "test_data\\tmp\\%s", object ); //full address of source file
                  sprintf(destination, "..\\in\\%s", object ); //full address of where the file is to be copied


                  sprintf(cmd,"IF EXIST %s del /Q %s", destination, destination);//to make sure to delete the file if it already exists in the safeXhonw\in folder
                  system(cmd);
                  memset(cmd,0,strlen(cmd));//deleting old values stored in cmd

                  sprintf(cmd, "copy %s %s", source, destination );
         }

        system(cmd);//using linux terminal or Windows command prompt to copy file from source folder into safeXhomedirectory in folder             

        memset(cmd,0,strlen(cmd));//deleting old values stored in cmd

        memset(source,0,strlen(source));//deleting old values stored in source
        memset(destination,0,strlen(destination));//deleting old values stored in destination

}

但是，当我通过它时，它始终为空，即文件名/对象不显示任何值，甚至不显示“（空）”。我知道这可能与此malloc命令有关。

这里是其他功能

char* ListDirectoryContents(const char *sDir)
{
WIN32_FIND_DATA fdFile;
HANDLE hFind = NULL;

char sPath[2000];

//Specify a file mask. *.* = We want everything!
sprintf(sPath, "%s\\*.*", sDir);

if((hFind = FindFirstFile(sPath, &fdFile)) == INVALID_HANDLE_VALUE)
{
    printf("Path not found: [%s]\n", sDir);
    return 1;
}

do
{
    //Find first file will always return "."
    //    and ".." as the first two directories.
    if(strcmp(fdFile.cFileName, ".") != 0
            && strcmp(fdFile.cFileName, "..") != 0)
    {
        //Build up our file path using the passed in
        //  [sDir] and the file/foldername we just found:
        sprintf(sPath, "%s\\%s", sDir, fdFile.cFileName);

        //Is the entity a File or Folder?
        if(fdFile.dwFileAttributes &FILE_ATTRIBUTE_DIRECTORY)
        {
            printf("Directory: %s\n", sPath);
            ListDirectoryContents(sPath); //Recursion, I love it!
        }
        else{
            printf("File: %s\n", sPath);
            FindClose(hFind);
            return sPath;
        }
    }
   }while(FindNextFile(hFind, &fdFile)); //Find the next file.

FindClose(hFind); //Always, Always, clean things up!

    return "";
}