sed命令不接受带有'.'的子字符串在ksh中 [英] sed command not accepting sub-string with '.' in ksh

问题描述

我正在编写一个ksh脚本，该脚本将包含@sys子字符串的路径变量处理为其相应的OS名称:

I am writing a ksh script which processes a path variable containing @sys substring to its corresponding OS name:

如果build_type是64位版本，我们需要在osver的末尾附加.64.

If build_type is is of 64bit version we need to append .64 at the end of osver.

例如如果opsys=amd64_linux26_rh5(红帽企业版Linux 5)和build_type=dbg64，osver应该是amd64_linux26_rh5.64.

e.g. if opsys=amd64_linux26_rh5(Red Hat Enterprise Linux 5) and build_type=dbg64, osver should be amd64_linux26_rh5.64.

现在，我想将file_path变量中的@sys替换为其对应的OS版本，作为子字符串，即amd64_linux26_rh5.64.

Now, I want to replace @sys present in file_path variable with its corresponding OS version as a substring i.e. amd64_linux26_rh5.64.

但sed似乎正在忽略.不知何故，唯一的amd64_linux26_rh5是替换@sys，省略了.64部分.

But it looks like sed is ignoring . somehow and the only amd64_linux26_rh5 is replacing @sys omitting the .64 part.

#!/bin/ksh
file_path="/xxx/xxx/xxx/@sys/xxx"
sys="@sys"
bld_type="dbg64"
opsys="amd64_linux26_rh5"
bitver=".64"
if [[ ${bld_type} = @(*64) ]]
then
    osver="${opsys}${bitver}"
fi
echo "osver: $osver"
echo "old file_path is : $file_path"
file_path=$(echo "$file_path" | sed "s/$sys/${osver}/")
echo "new file_path is : $file_path"

对应的输出:

osver: amd64_linux26_rh5.64
old file_path is : /xxx/xxx/xxx/amd64_linux26_rh5/xxx
new file_path is : /xxx/xxx/xxx/amd64_linux26_rh5/xxx

我们正在尝试将file_path更改为/xxx/xxx/xxx/amd64_linux26_rh5.64/xxx.在这种情况下，请提出使用sed的适当方法.

We are trying to change file_path to /xxx/xxx/xxx/amd64_linux26_rh5.64/xxx. Please suggest an appropriate way use sed in this case.

推荐答案

输出显示时

old file_path is : /xxx/xxx/xxx/amd64_linux26_rh5/xxx

然后在复制粘贴代码时出了点问题.
在您的代码中，file_path设置为

then something went wrong in copy-pasting the code.
In your code the file_path is set to

file_path="/xxx/xxx/xxx/@sys/xxx"

，并且永远不会在echo之前更改.因此，您的代码似乎与您显示的代码不同. 当您在

and is never changed before the echo. So your code seems to be different from what you show. When you start after the

 echo "old file_path is : $file_path"

输出有意义.
在您的sed命令中

the output makes sense.
In your sed command

file_path=$(echo "$file_path" | sed "s/$sys/${osver}/")

sed在字符串/xxx/xxx/xxx/amd64_linux26_rh5/xxx中找不到@sys，并且old_string保持不变.

sed will not find @sys in the string /xxx/xxx/xxx/amd64_linux26_rh5/xxx, and the old_string remains unchanged.

这篇关于sed命令不接受带有'.'的子字符串在ksh中的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！