☰

如何在 SSH 命令中使用命令行变量？

tag-icon • tag-icon command-line bash scripts ssh
如何在 SSH 命令中使用命令行变量？

编辑：我想循环遍历名称中包含变量 c 的所有文件，但由于某种原因，此脚本循环遍历目录中的所有文件......不应该是“$c“仅匹配包含 c 的文件名？

我还想解析 $b 和 $e 破折号之间的数字

我认为这仍然是对三个变量访问不当的问题

while getopts ":a:b:c:" arg; do
  case "${arg}" in
    a) a="$OPTARG";;
    b) b="$OPTARG";;
    c) c="$OPTARG";;
  esac
done

echo "Locally using begin: $a , end: $b, and customer: $c"

cd "/opt/data"

a="$(echo "$a" | sed -e 's/[-]/\\&/g')"
b="$(echo "$b" | sed -e 's/[-]/\\&/g')"

ssh -o ... -i $Host <<EOF


echo "Remotely using begin: $a , end: $b, and customer: $c"

find . -type f -name "*$c*" -print0 | while IFS= read -r -d $'\0' file; 
do
  echo $file
done

答案1

您的脚本存在几个问题。

首先是getopts 在遇到第一个非选项参数时停止处理。由于您尚未将其声明-e为选项参数，因此它将未经处理，并且不会为 分配任何值c。考虑：

$ cat myscript
#!/bin/bash

printf  'Processing option arguments:\n'
while getopts ":a:b:c:" arg; do
  case "${arg}" in
    a) a="$OPTARG"; echo "\$a is $a";;
    b) b="$OPTARG"; echo "\$b is $b";;
    c) c="$OPTARG"; echo "\$c is $c";;
  esac
done
printf 'Done.\n\n'

shift $((OPTIND - 1))

printf 'Remaining (non-option) arguments:\n'
printf '%s\n' "$@"

按照建议运行你上面的评论：

$ ./myscript -b 06-30-20-18-10 -e 06-30-20-23-59 -c name otherarg whatever
Processing option arguments:
$b is 06-30-20-18-10
Done.

Remaining (non-option) arguments:
06-30-20-23-59
-c
name
otherarg
whatever

第二，即使在本地 shell 中为变量 c 赋值，引用 heredoc 的结束标记 'EOF' 阻止本地 shell 扩展它. 因此远程 shell 接收$c，并将其扩展为其（几乎肯定是空的）值。

纠正两个问题：

$ cat myscript
#!/bin/bash

printf  'Processing option arguments:\n'
while getopts ":a:b:c:e:" arg; do
  case "${arg}" in
    a) a="$OPTARG"; echo "\$a is $a";;
    b) b="$OPTARG"; echo "\$b is $b";;
    c) c="$OPTARG"; echo "\$c is $c";;
    e) e="$OPTARG"; echo "\$e is $e";;
  esac
done
printf 'Done.\n\n'

shift $((OPTIND - 1))

printf 'Remaining (non-option) arguments:\n'
printf '%s\n' "$@"

ssh localhost << EOF

printf '%s\n' "$a" "$b" "$c" "$e"

EOF

然后

$ ./myscript -b 06-30-20-18-10 -e 06-30-20-23-59 -c name
Processing option arguments:
$b is 06-30-20-18-10
$e is 06-30-20-23-59
$c is name
Done.

Remaining (non-option) arguments:

Pseudo-terminal will not be allocated because stdin is not a terminal.
Enter passphrase for key '/home/steeldriver/.ssh/id_rsa':
Welcome to Ubuntu 18.04.5 LTS (GNU/Linux 4.15.0-143-generic x86_64)

You have mail.


06-30-20-18-10
name
06-30-20-23-59

相关内容