引号问题求助，头疼呀

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要实现的功能：能使用函数SafeExec正确执行传入的命令

这个测试脚本要实现的功能是通过su切换用户用，能通过echo 命令将hello打印出来

现在怎么也无法实现，请各位TX帮忙，谢谢

#!/bin/bash
function SafeExec()
{
local cmd=$*

echo "cmd=${cmd}"
    `${cmd}`
if [ $? -ne 0 ]; then
  echo "Exec ${cmd} FAILED."
    else
        echo "Exec ${cmd} SUCCESS."
fi
}

SafeExec "su - root -c \"echo hello\""

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这样执行的话是报这个错

cmd=su - root -c "echo hello"
hello": -c: line 0: unexpected EOF while looking for matching `"'
hello": -c: line 1: syntax error: unexpected end of file
Exec su - root -c "echo hello" FAILED.

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改成这样又报这个错误
SafeExec "su - root -c '"'echo hello'"'"

cmd=su - root -c 'echo hello'
hello': -c: line 0: unexpected EOF while looking for matching `''
hello': -c: line 1: syntax error: unexpected end of file
Exec su - root -c 'echo hello' FAILED.

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尝试的各种方法和报错如下：
SafeExec "su - root -c 'echo hello'"

cmd=su - root -c 'echo hello'
hello': -c: line 0: unexpected EOF while looking for matching `''
hello': -c: line 1: syntax error: unexpected end of file


SafeExec 'su - root -c "echo hello"'

cmd=su - root -c "echo hello"
hello": -c: line 0: unexpected EOF while looking for matching `"'
hello": -c: line 1: syntax error: unexpected end of file

SafeExec "su - root -c '"'echo hello'"'"
cmd=su - root -c 'echo hello'
hello': -c: line 0: unexpected EOF while looking for matching `''
hello': -c: line 1: syntax error: unexpected end of file

liaosnet

除了root用户su - root都需要密码验证~

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脚本就是在root下运行，问题的关键是都无法正确的将参数传入

liaosnet

1. 
   
2. #!/bin/bash
   
3. function SafeExec()
   
4. {
   
5. local cmd=$*
   
6. 
   
7. echo "cmd=${cmd}"
   
8.     ${cmd}
   
9. if [ $? -ne 0 ]; then
   
10.   echo "Exec ${cmd} FAILED."
    
11. else
    
12.   echo "Exec ${cmd} SUCCESS."
    
13. fi
    
14. }
    
15. 
    
16. SafeExec su - root -c 'echo hello'
    

复制代码

不要把引号带去去..

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原帖由 liaosnet 于 2009-12-3 13:01 发表

#!/bin/bash
function SafeExec()
{
local cmd=$*

echo "cmd=${cmd}"
    ${cmd}
if [ $? -ne 0 ]; then
  echo "Exec ${cmd} FAILED."
else
  echo "Exec ${cmd} SUCCESS."
fi
}

SafeExec s ...

不带引号是是什么意思?

如果直接这样调用 SafeExec su - root -c echo hello 的话，可以执行echo命令，但是hello这个参数是没有传进去的

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自己顶一下

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不要沉了呀，问题还没有解决，各位老大出手呀