Bash 脚本 - 使用 Basename 输出到文件
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Bash Script - Using Basename to Output to File
提问by muttley91
I've created a small script to test out getting the basename of all files in the current directory. I want to output them all to a file output.txtbut using a for loop, of course the file is just overwritten each time. Using the following code, how could I modify it to simply append each one to the end of the file (simply)?
我创建了一个小脚本来测试获取当前目录中所有文件的基本名称。我想将它们全部输出到一个文件中，output.txt但使用 for 循环，当然该文件每次都会被覆盖。使用以下代码，我如何修改它以简单地将每个附加到文件的末尾（简单地）？
#!/bin/bash
files=$(find -size +100)
for f in $files; do
basename "$f" > output.txt
done
exit
回答by Glen Solsberry
Or the oneliner:
或者单线：
find -size +100 -exec basename "{}" \; >> output
回答by Paused until further notice.
Use MrAfs' suggestion and move the redirection to the end of the loop. By using >instead of >>you don't have to truncate the file explicitly.
使用 MrAfs 的建议并将重定向移动到循环的末尾。通过使用>而不是>>您不必显式截断文件。
Also, use a while readloop so it works in case there are spaces in filenames. The exitat the end is redundant.
此外，使用while read循环，以便在文件名中有空格的情况下工作。所述exit在端部是多余的。
#!/bin/bash
find -size +100 | while read -r f
do
basename "$f"
done > output.txt
In some cases, you will want to avoid creating a subshell. You can use process substitution:
在某些情况下，您会希望避免创建子 shell。您可以使用进程替换：
#!/bin/bash
while read -r f
do
basename "$f"
done < <(find -size +100) > output.txt
or in the upcoming Bash 4.2:
或者在即将发布的 Bash 4.2 中：
#!/bin/bash
shopt -s lastpipe
find -size +100 | while read -r f
do
basename "$f"
done > output.txt
回答by Mark Loeser
You should be using >>to append to the file instead of >.
您应该使用>>附加到文件而不是>.
回答by MrAfs
You can redirect bash constructs
您可以重定向 bash 结构
#!/bin/bash
files=$(find -size +100)
for f in $files; do
basename "$f"
done > output.txt
exit
回答by Alex Howansky
You can do this:
你可以这样做：
rm -f output.txt
for f in $files; do
basename "$f" >> output.txt
done
Or this:
或这个：
for f in $files; do
basename "$f"
done > output.txt
回答by hipe
Without calling basename:
不调用基名：
find -size +100 -printf "%f\n" > output.txt
