实际收益code为SCP [英] Actual return code for SCP

问题描述

我写一个bash脚本，通过文件名的例子不胜枚举，并尝试使用 SCP 每个文件从两个服务器复制到本地文件夹。然后，该脚本本地文件相互比较。然而有时，该文件将不会在一台服务器或另一个或两个上存在。

I am writing a bash script that goes through a list of filenames and attempts to copy each file using scp from two servers into a local folder. The script then compares the local files to each other. Sometimes however, the file will not exist on one server or the other or both.

起初，我就是用这个code：

At first, I was using this code:

scp $user@$host:/etc/$file ./$host/conf/ 2>/tmp/Error 1>/dev/null
error=$(</tmp/Error) # error catching
if [[ -n "$error" ]]; then echo -e "$file not found on $host"; fi

但我发现，一些（企业）服务器输出（法律术语）消息（到stderr我猜）的每一个用户通过 SCP 连接时或 SSH 。于是我开始寻找到利用<一个href=\"http://stackoverflow.com/questions/921210/can-i-know-abt-the-exit-status-of-the-scp-command-in-unix\">exit codeS 。

But I found that some (corporate) servers output a (legalese) message (to stderr I guess) every time a user connects via scp or ssh. So I started looking into utilizing exit codes.

我可以简单地用

scp $user@$host:/etc/$file ./$host/conf/ 2>/tmp/Error 1>/dev/null
if [[ $? -ne 0 ]]; then echo -e "$file not found on $host"; fi

但由于退出code表示文件不存在应该是6 ，我宁愿有一个更precise

but since the exit code for "file does not exist" is supposed to be 6, I would rather have a more precise

scp $user@$host:/etc/$file ./$host/conf/ 2>/tmp/Error 1>/dev/null
if [[ $? -eq 6 ]]; then echo -e "$file not found on $host"; fi

问题是，我似乎得到1退出code不管是什么地方出了错。这个问题类似于这一个，但这个问题的答案并不能帮助我击。

The problem is that I seem to be getting an exit code of 1 no matter what went wrong. This question is similar to this one, but that answer does not help me in Bash.

我正在考虑另一种方案是

Another solution I am considering is

scp $user@$host:/etc/$file ./$host/conf/ 2>/tmp/Error 1>/dev/null
error=$(</tmp/Error) # error catching
if [[ ${error: -25} = "No such file or directory" ]]; then echo -e "$file not found on $host"; fi

但我关注的是不同版本的 SCP 的可能对相同的错误不同的错误消息。

But I am concerned that different versions of scp could have different error messages for the same error.

有没有办法让 SCP 的实际退出code在Bash脚本？

Is there a way to get the actual exit code of scp in a Bash script?

推荐答案

每评论（ @gniourf_gniourf ， @shelter ， @Wintermute ），我决定简单地切换工具的rsync 。值得庆幸的语法不需要在所有被改变。

Per the comments (@gniourf_gniourf, @shelter, @Wintermute) I decided to simply switch tools to rsync. Thankfully the syntax doesn't need to be changed at all.

23 是错误code时，不存在这样的文件在这里我得到的是code我结束了

23 was the error code I was getting when files didn't exist so here is the code I ended up with

rsync -q $user@$host:/etc/$file ./$host/conf/ 2>/tmp/Error 1>/dev/null
if [[ $? -eq 23 ]]; then echo -e "$file not found on $host"; continue; fi

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