SSH会中断在bash while循环的 [英] ssh breaks out of while-loop in bash

问题描述

我用这个bash- code将文件上传到远程服务器，对于正常的文件，这工作得很好：

I use this bash-code to upload files to a remote server, for normal files this works fine:

for i in `find devel/ -newer $UPLOAD_FILE`
do
    echo "Upload:" $i
    if [ -d $i ]
    then
        echo "Creating directory" $i
        ssh $USER@$SERVER "cd ${REMOTE_PATH}; mkdir -p $i"
        continue
    fi
    if scp -Cp $i $USER@$SERVER:$REMOTE_PATH/$i
    then
        echo "$i OK"
    else
        echo "$i NOK"
        rm ${UPLOAD_FILE}_tmp
    fi
done

唯一的问题是，在名称中有空格的文件，for循环失败，所以我取代了第一行是这样的：

The only problem is that for files with a space in the name, the for-loop fails, so I replaced the first line like this:

find devel/ -newer $UPLOAD_FILE | while read i
do
    echo "Upload:" $i
    if [ -d $i ]
    then
        echo "Creating directory" $i
        ssh $USER@$SERVER "cd ${REMOTE_PATH}; mkdir -p $i"
        continue
    fi
    if scp -Cp $i $USER@$SERVER:$REMOTE_PATH/$i
    then
        echo "$i OK"
    else
        echo "$i NOK"
        rm ${UPLOAD_FILE}_tmp
    fi
done

有关一些奇怪的原因，SSH命令就会中断while循环，因此第一个丢失目录中创建罚款，但随后的所有丢失的文件/目录将被忽略。的

For some strange reason, the ssh-command breaks out of the while-loop, therefore the first missing directory is created fine, but all subsequent missing files/directories are ignored.

我想这牵扯到使用ssh写的东西到stdout其迷惑读命令。注释掉SSH命令，使循环的工作，因为它应该。

I guess this has something to do with ssh writing something to stdout which confuses the "read" command. Commenting out the ssh-command makes the loop work as it should.

是否有人知道为什么会这样，一个如何从打破while循环prevent SSH？

Does anybody know why this happens and how one can prevent ssh from breaking the while-loop?

推荐答案

的问题是， SSH 从标准输入读取，因此，吃你的全部剩余线路。您可以从标准输入设备只要连接到无处：

The problem is that ssh reads from standard input, therefore it eats all your remaining lines. You can just connect its standard input to nowhere:

ssh $USER@$SERVER "cd ${REMOTE_PATH}; mkdir -p $i" < /dev/null

您也可以使用 SSH -n 而不是重定向。

You can also use ssh -n instead of the redirection.

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