在“for”循环中使用“tee”进行管道传输

发布于 2024-11-26 16:17:12 字数 559 浏览 1 评论 0原文

这可能是新手逃避问题。我正在尝试在这样的 for 循环中运行命令

$ for SET in `ls ../../mybook/WS/wsc_production/`; do ~/sandbox/scripts/ftype-switch/typesort.pl /media/mybook/WS/wsc_production/$SET ./wsc_sorter/$SET | tee -a sorter.log; done;

，但最终 sorter.log 为空。（我确信有一些输出。）如果我转义管道符号 (\|)，我最终不会得到 sorter.log 完全没有。

我做错了什么？

$ bash --version
GNU bash, version 4.1.5(1)-release (i486-pc-linux-gnu)

编辑：糟糕，/media/mybook/睡着了，所以实际上没有输出。该代码首先是正确的。不过还是谢谢大家的评论。

原文

This is probably a newbie's escaping problem. I'm trying run command in a for loop like this

$ for SET in `ls ../../mybook/WS/wsc_production/`; do ~/sandbox/scripts/ftype-switch/typesort.pl /media/mybook/WS/wsc_production/$SET ./wsc_sorter/$SET | tee -a sorter.log; done;

but I end up with sorter.log being empty. (I'm sure there is some output.) If I escape the pipe symbol (\|), I end up with no sorter.log at all.

What am I doing wrong?

$ bash --version
GNU bash, version 4.1.5(1)-release (i486-pc-linux-gnu)

Edit: Oops, /media/mybook/ fell asleep, so there actually was no output. The code was correct in the first place. Thanks to all for comments, though.

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黯然#的苍凉 2024-12-03 16:17:12

格伦说得好。我想提供一个不同的角度：您可以将“tee”命令移到 for 循环之外。这种方法的优点是 tee 仅被调用一次：

dir1=$HOME/sandbox/scripts/ftype-switch
dir2=/media/mybook/WS/wsc_production
for SET in ../../mybook/WS/wsc_production/*; do 
  $dir1/typesort.pl $dir2/$SET ./wsc_sorter/$SET 2>&1 
done | tee -a sorter.log

Glenn said it well. I would like to offer a different angle: you can move the 'tee' command outside of the for loop. The advantage to this approach is tee is invoked only once:

dir1=$HOME/sandbox/scripts/ftype-switch
dir2=/media/mybook/WS/wsc_production
for SET in ../../mybook/WS/wsc_production/*; do 
  $dir1/typesort.pl $dir2/$SET ./wsc_sorter/$SET 2>&1 
done | tee -a sorter.log

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盗心人 2024-12-03 16:17:12

您正在使用 tee，因此如果有输出，您会在终端上看到它。你看到了什么？

如果您看到输出，则您看到的可能是 stderr，因此您可能需要重定向它：

dir1=$HOME/sandbox/scripts/ftype-switch
dir2=/media/mybook/WS/wsc_production
for SET in ../../mybook/WS/wsc_production/*; do 
  $dir1/typesort.pl $dir2/$SET ./wsc_sorter/$SET 2>&1 | tee -a sorter.log
done

You're using tee, so if there is output, you'd see it on your terminal. What do you see?

If you see output, it's probably stderr you're seeing, so you might want to redirect it:

dir1=$HOME/sandbox/scripts/ftype-switch
dir2=/media/mybook/WS/wsc_production
for SET in ../../mybook/WS/wsc_production/*; do 
  $dir1/typesort.pl $dir2/$SET ./wsc_sorter/$SET 2>&1 | tee -a sorter.log
done

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