bash中的Expect脚本的文件名扩展

debugcn 发表于 Dev

德克里斯

我有以下带有嵌入式Expect脚本的bash脚本：

#!/bin/bash

if [ ! $# == 2 ]
  then
    echo "Usage: $0 os_base_version sn_version"
    exit
fi

if [ -e /some/file/path/$10AS_26x86_64_$2_*.bin ]
  then
    filename="/some/file/path/$10AS_26x86_64_$2_*.bin"
    echo ${filename}
else
  echo "install archive does not exist."
  exit
fi

{
  /usr/bin/expect << EOD
  set timeout 20
  spawn "${filename}"

  expect {
      "Press Enter to view the End User License Agreement" {
          send "\r"
          exp_continue
      }
      "More" {
          send " "
          exp_continue
      }
      "Do you accept the End User License Agreement?" {
          send "y\r"
      }
  }
  interact
  expect eof
EOD
}

文件夹中有几个文件，格式为 {x}0AS_26x86_64_{x.x.x}_{rev}.bin

运行脚本时，在第一个回显中获取正确的文件名。但是，当我尝试使用将它传递给期望脚本时${filename}，文件名扩展消失了。

样本输出：

# ./make.sh 2 1.2.3
/some/file/path/20AS_26x86_64_1.2.3_45678.bin
spawn /some/file/path/20AS_26x86_64_1.2.3_*.bin
couldn't execute "/some/file/path/20AS_26x86_64_1.2.3_*.bin": no such file or directory
    while executing
"spawn /some/file/path/20AS_26x86_64_1.2.3_*.bin"

正如您所看到的，$filename显示与回声是正确的，但在期望部分中却没有。

编辑：

只需使用-x运行脚本，看起来文件名变量就永远不会得到完整的文件名扩展，只有echo可以。

# ./make.sh 2 1.2.3
+ '[' '!' 2 == 2 ']'
+ '[' -e /some/file/path/20AS_26x86_64_1.2.3_45678.bin ']'
+ filename='/some/file/path/20AS_26x86_64_1.2.3_*.bin'
+ echo /some/file/path/20AS_26x86_64_1.2.3_45678.bin
/some/file/path/20AS_26x86_64_1.2.3_45678.bin
+ exit

芒登

您实际上从未为该变量分配特定的文件名。您正在做的是将变量设置为全局模式。然后，将变量传递给时echo，将扩展全局模式，因此您看到的文件名已被整理。但是，该变量从未设置为特定的文件名。

因此，您需要一种更好的获取文件名的方法。就像是：

#!/bin/bash

## Make globs that don't match anything expand to a null
## string instead of the glob itself
shopt -s nullglob
## Save the list of files in an array
files=( /some/file/path/$10AS_26x86_64_$2_*.bin )
## If the array is empty
if [ -z $files ]
then
    echo "install archive does not exist."
    exit
## If at least one file was found    
else
    ## Take the first file 
    filename="${files[0]}"
    echo "$filename"
fi

{
  /usr/bin/expect << EOD
  set timeout 20
  spawn "${filename}"

  expect {
      "Press Enter to view the End User License Agreement" {
          send "\r"
          exp_continue
      }
      "More" {
          send " "
          exp_continue
      }
      "Do you accept the End User License Agreement?" {
          send "y\r"
      }
  }
  interact
  expect eof
EOD
}

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