linux - 将 header 添加到多个 .txt 文件中

Question

我需要一个批处理文件，它将在数百个 .txt 文件的内容开头的新行中添加文本“Write In”，而不删除任何现有文本。我在这里发现了一些对我不起作用的东西。有人有建议吗？

这是我正在使用的代码:

for /r %%a in (*.txt) do (
    echo ---- %%a before ----
    type "%%a"
    echo --------------------

    echo Write In > "%%a.tmp"
    type "%%a" >> "%%a.tmp"
    del "%%a"
    move "%%a.tmp" "%%a"

    echo ---- %%a after ----
    type "%%a"
    echo --------------------
)
pause

什么都没做

Answer 1

我很可能会这样做:

rem // Create temporary header file:
> "head.txt" echo Write In
rem // Iterate all text files in current directory:
for %%F in ("*.txt") do (
    rem /* Combine header and currently iterated text file into a temporary file;
    rem    there cannot arise any file name conflicts (like temporary files becoming
    rem    iterated also unintendedly, or temporary files overwriting files to handle),
    rem    because the extension of the temporary files differ from the text files: */
    copy /B "head.txt"+"%%~F" "%%~F.tmp"
    rem // Overwrite original text file by temporary file, erase the latter:
    move /Y "%%~F.tmp" "%%~F"
)
rem // Erase the temporary header file:
del "head.txt"