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bash从url.txt获取dirname

bash

-1

Alexandr Bortnik · 技术社区 · 7 年前

$ cat urls.txt
/var/www/example.com.com/upload/email/email-inliner.html
/var/www/example.com.com/upload/email/email.html
/var/www/example.com.com/upload/email/email2-inliner.html
/var/www/example.com.com/upload/email/email2.html
/var/www/example.com.com/upload/email/AquaTrainingBag.png
/var/www/example.com.com/upload/email/fitex/fitex-ecr7.jpg
/var/www/example.com.com/upload/email/fitex/fitex-ect7.jpg
/var/www/example.com.com/upload/email/fitex/fitex-ecu7.jpg
/var/www/example.com.com/upload/email/fitex/fitex.html
/var/www/example.com.com/upload/email/fitex/logo.png
/var/www/example.com.com/upload/email/fitex/form.html
/var/www/example.com.com/upload/email/fitex/fitex.txt
/var/www/example.com.com/upload/email/bigsale.html
/var/www/example.com.com/upload/email/logo.png
/var/www/example.com.com/upload/email/bigsale.png
/var/www/example.com.com/upload/email/bigsale-shop.html
/var/www/example.com.com/upload/email/bigsale.txt

有谁能帮我弄到 dirname 为了这个?

dirname /var/www/example.com.com/upload/email/sss.png 很好,但是url列表呢?

for 或 while ). 因为url的数量可以超过几千万。最好的方法是借助于重定向(tee)到文件

1 回复 | 直到 7 年前

1

3

kvantour 7 年前

像往常一样,当它归结为这样的事情,Awk来拯救:

awk 'BEGIN{FS=OFS="/"}{NF--}1' <file>

请注意,这是 dirname 目录名

awk 'BEGIN{FS=OFS="/"}{gsub("/+","/")}
     {s=$0~/^\//;NF-=$NF?1:2;$0=$0?$0:(s?"/":".")};1' <file>

下表显示了差异:

| path       | dirname | awk full | awk short |
|------------+---------+----------+-----------|
| .          | .       | .        |           |
| /          | /       | /        |           |
| foo        | .       | .        |           |
| foo/       | .       | .        | foo       |
| foo/bar    | foo     | foo      | foo       |
| foo/bar/   | foo     | foo      | foo/bar   |
| /foo       | /       | /        |           |
| /foo/      | /       | /        | /foo      |
| /foo/bar   | /foo    | /foo     | /foo      |
| /foo/bar/  | /foo    | /foo     | /foo/bar  |
| /foo///bar | /foo    | /foo     | /foo//    |

各种替代解决方案可在 Extracting directory name from an absolute path using sed or awk . 解决方案 Kent 一切都会好起来的 Solid Kim 只是需要一个小调整,以修复多个斜杠(并错过了upvots!)