我正在搜索一个文件,比如“file1.txt”,并且find命令的输出如下所示.
/home/nicool/Desktop/file1.txt
/home/nicool/Desktop/dir1/file1.txt
/home/nicool/Desktop/dir1/dir2/file1.txt
在上面的例子中我只想要共同的父目录,在上面的例子中是“/ home / nicool / Desktop”.如何使用bash实现？请帮助找到这种问题的一般解决方案.
最佳答案
此脚本读取行并在每次迭代中存储公共前缀：
原文链接：https://www.f2er.com/linux/440020.html# read a line into the variable "prefix",split at slashes
IFS=/ read -a prefix
# while there are more lines,one after another read them into "next",# also split at slashes
while IFS=/ read -a next; do
new_prefix=()
# for all indexes in prefix
for ((i=0; i < "${#prefix[@]}"; ++i)); do
# if the word in the new line matches the old one
if [[ "${prefix[i]}" == "${next[i]}" ]]; then
# then append to the new prefix
new_prefix+=("${prefix[i]}")
else
# otherwise break out of the loop
break
fi
done
prefix=("${new_prefix[@]}")
done
# join an array
function join {
# copied from: https://stackoverflow.com/a/17841619/416224
local IFS="$1"
shift
echo "$*"
}
# join the common prefix array using slashes
join / "${prefix[@]}"
例：
$./x.sh <