如何获得衍生进程的退出code在期望的shell脚本？ [英] How to get the exit code of spawned process in expect shell script?

问题描述

我试图执行一个执行的expect脚本以及衍生的进程有退出code在它的脚本。但我无法得到衍生进程主脚本的退出code。我总是得到零成功。

I am trying to execute a script that executes an EXPECT script and a spawned process which has exit code in it. But I'm unable to get the exit code of the spawned process to main script. I'm always getting zero as success.

期望脚本是：

 [Linux Dev:anr ]$ cat testexit.sh
 #!/bin/bash
 export tmp_script_file="/home/anr/tmp_script_temp.sh"
 cp /home/anr/tmp_script $tmp_script_file
 chmod a+x $tmp_script_file
 cat $tmp_script_file
 expect << 'EOF'
 set timeout -1
 spawn  $env(tmp_script_file)
 expect {
 "INVALID "  { exit 4 }
 timeout     { exit 4 }
 }
 EOF
 echo "spawned process status" $?
 rm -f $tmp_script_file
 echo "done"

衍生的脚本：

 [Linux Dev:anr ]$ cat tmp_script
 exit 3

Expect脚本的执行：

Execution of Expect script:

 [Linux Dev:anr ]$ ./testexit.sh
 exit 3
 spawn /home/anr/tmp_script_temp.sh
 spawned process status 0
 done

但问题是我无法获得出口产生了回报code期望脚本。我想催生脚本的退出code 3到主脚本和主脚本应该与退出code 3退出。

Problem is I am unable to get the spawned exit return code to expect script. I want the exit code 3 of spawned script to main script and main script should be exit with exit code 3.

请帮我拿到催生出code到主脚本。

Please help me to get the spawned exit code to main script.

推荐答案

随着格伦的帮助下，我得到的解决方案..和我最后的脚本是：

With the help of glenn, I got solution.. and my final script is::

预计脚本

 [Linux Dev:anr ]$ cat testexit.sh
 #!/bin/bash
 export tmp_script_file="/home/anr/tmp_script_temp.sh"
 cp /home/anr/tmp_script $tmp_script_file
 chmod a+x $tmp_script_file
 cat $tmp_script_file
 expect << 'EOF'
 set timeout -1
 spawn  $env(tmp_script_file)
 expect {
 "INVALID "  { exit 4 }
 timeout     { exit 4 }
 eof
 }

 foreach {pid spawnid os_error_flag value} [wait] break

 if {$os_error_flag == 0} {
     puts "exit status: $value"
     exit $value
 } else {
     puts "errno: $value"
     exit $value
 }
 EOF
 echo "spawned process status" $?
 rm -f $tmp_script_file
 echo "done"

衍生的脚本：

 [Linux Dev:anr ]$ cat tmp_script
 exit 3

Expect脚本的执行：

Execution of Expect script:

 [Linux Dev:anr ]$ ./testexit.sh
 exit 3
 spawn /home/anr/tmp_script_temp.sh
 exit status: 3
 spawned process status 3
 done

感谢格伦再次..

Thanks Glenn once again..

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