多少个文件中查找发现了什么？ [英] how many files find found?

问题描述

我在写一个脚本，在这里我要报错了，如果我在寻找的文件在多个位置存在，并且告诉用户位置（查找结果）。所以我有一个发现像：

  file_location = $（$找到DIR -name $文件-print）
 

我想它应该是简单的，看文件是否在多个地方发现，但我一定不能匹配找到什么用途与分离的结果（好像空间有时和一个换行符等）。因此，而不是上匹配，我想看看是否有$ file_location $文件之后的任何字符。

我检查

 回声$ file_location| grep的-q$ {}文件。然后
 

这仍然无法正常工作。所以我想我不在乎我用的，除了我想捕捉$ file_location作为查找的结果，然后检查。您能否提供一个很好的方式？

解决方案

 找到= $（发现$目录-name$文件-ls）
数= $（WC -l＆LT;＆LT;＆LT;$找到了）
如果[$伯爵-gt 1]
然后
  回声我发现不止一个：
  回声$发现
科幻
 

有关零的比赛中，你仍然会收到一个1，因为不透明的方式外壳的条的使用 $（）运营商尾随的换行符，所以实际上，第一个线路输出和零线输出到底两者一行。参见 XXD＆LT;＆LT;＆LT; 为换行的自动追加示范输入再次使用时。一个简单的方法来规避这是在字符串的开头加上一个假的换行，所以没有空字符串可能发生：找到= $（回声;发现...），和然后减去一个来自行数

编辑：我改变了的使用-printf％P \\ N在回答 -ls 它执行正确的换行的报价。在其中会搞乱了计数，否则用换行文件名

I'm writing a script where I want to error out if the file I'm searching for exists in multiple locations, and tell the user the locations (the find results). So I've got a find like:

file_location=$(find $dir -name $file -print)

I'm thinking it should be simple to see if the file is found in multiple places, but I must not be matching what find uses to separate results with (seems like space sometimes, and a newline others). As such, rather than matching on that, I want to see if there are any characters after $file in $file_location.

I'm checking for

echo "$file_location" | grep -q "${file}."; then

and this still doesn't work. So I guess I don't care what I use, except I want to capture $file_location as a result of the find, and then check that. Can you suggest a good way?

解决方案

found=$(find "$dir" -name "$file" -ls)
count=$(wc -l <<< "$found")
if [ "$count" -gt 1 ]
then
  echo "I found more than one:"
  echo "$found"
fi

For zero matches found you will still receive a 1 because of the intransparent way the shell strips a trailing newline with the $() operator, so effectively one line output and zero lines output are both one line in the end. See xxd <<< "" for demonstration of the automatic appending of a newline when used as input again. A simple way to circumvent this is to add a fake newline in the beginning of the string, so no empty string can happen: found=$(echo; find …), and then subtract one from the number of lines.

EDIT: I changed the usage of -printf "%p\n" in my answer to -ls which performs a proper quoting of newlines. Otherwise file names with newlines in them would mess up the counting.

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