用于搜索 LDAP 条目的 Bash 脚本
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Bash script to search for LDAP entries
提问by rahuL
I have a bash script which is to be used to delete a particular user if it exists in a group.
我有一个 bash 脚本，用于删除组中存在的特定用户。
First I extracted all the group names and saved it to a file. As the next step, I thought I should parse through the file, and use the ldapsearch command on all the entries and grep the user, and if it exists, use ldapmodify to delete it.
首先，我提取了所有组名并将其保存到一个文件中。下一步，我想我应该解析文件，并对所有条目使用ldapsearch命令并grep用户，如果存在，使用ldapmodify将其删除。
My question is how to write the if condition, i.e if [ *ldapsearch query* == True];then
我的问题是如何写if条件，即 if [ *ldapsearch query* == True];then
This is what my ldapsearch looks like, and the first line inside the while loop is to be the ifstatement.
这就是我的 ldapsearch 的样子，while 循环中的第一行就是if语句。
while read grp;do
ldapsearch -w 'ldappass' -D "cn=adminuser,dc=some-domain,dc=com" -b "cn=$grp,ou=group,dc=some-domain,dc=com" | grep $someuser
done</home/someuser/tempfile.txt
On the CLI, this ldapsearch query returns the following output;
在 CLI 上，此 ldapsearch 查询返回以下输出；
memberUid: testuser
memberUid: testuser
So essentially, if the ifstatement returns some value (i.e. the user exists), then I have to delete the user. How do I get a correct ifstatement to get a True or False result for the ldapsearch query?
所以本质上，如果if语句返回一些值（即用户存在），那么我必须删除用户。如何获得正确的if语句以获取 ldapsearch 查询的 True 或 False 结果？
采纳答案by fedorqui 'SO stop harming'
You can use the -zoption, that checks if the string is empty or not. [ -z "$string" ]is true if the string is empty. Then, this can make it:
您可以使用该-z选项来检查字符串是否为空。[ -z "$string" ]如果字符串为空，则为真。然后，这可以做到：
if [ ! -z "$(yourcommand)" ]; then
do_things
fi
For example say we want to check if a directory is empty:
例如，假设我们要检查目录是否为空：
if [ ! -z "$(ls)" ]; then
echo "there is something"
else
echo "this dir is empty"
fi
All together:
全部一起：
while IFS= read -r grp;do
if [ ! -z "$(ldapsearch -w 'ldappass' -D "cn=adminuser,dc=some-domain,dc=com" -b "cn=$grp,ou=group,dc=some-domain,dc=com" | grep $someuser)" ]; then
remove $someuser
fi
done < /home/someuser/tempfile.txt
