从 bash 脚本获取 perl 脚本的输出并退出
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get output of perl script from bash script and exit
提问by user391986
From a bash script how can i execute a perl script get the output and exit if value is = 0? Also in the perl script how do i return the value, do i just return it or do i print it?
如果值 = 0，我如何从 bash 脚本执行 perl 脚本获取输出并退出？同样在 perl 脚本中，我如何返回值，我是直接返回它还是打印它？
回答by William Pursell
#!/bin/bash perl-script args && exit
If you want to continue running, the return value is in $?
如果要继续运行，返回值在$?
Note that there is a distinction between the value returned by the perl script and the output of the script. To get the output of the script, use the $() operator:
请注意，perl 脚本返回的值和脚本的输出之间存在区别。要获取脚本的输出，请使用 $() 运算符：
#!/bin/bash output=$(perl-script args) echo The perl script returned $? echo The output of the script was $output
回答by Rafe Kettler
To get a return code, use the exitfunction. Example:
要获取返回码，请使用该exit函数。例子：
Perl script:
Perl 脚本：
if ($success) {
$return_value = 0;
} else {
$return_value = 1;
}
exit($return_value);
Bash script:
bash脚本：
perl scriptname args > outfile && exit
That's assuming that you want to exit if the return value of the Perl script is 0 and you want so save the output of the Perl script in outfile. If the return value is not zero, it's stored in $?, you can save that value to a variable if you please.
这是假设您想在 Perl 脚本的返回值为 0 时退出，并且您希望将 Perl 脚本的输出保存在outfile. 如果返回值不为零，则将其存储在 中$?，如果愿意，您可以将该值保存到变量中。
回答by anubhava
Your perl script: foo.pl
你的 perl 脚本：foo.pl
#!/usr/bin/perl
# do something and then
exit 1;
And inside your bash script foo.sh:
在你的 bash 脚本 foo.sh 中：
#!/bin/bash
# do something and then call perl script
perl foo.pl
# check return value using $?
echo "perl script returned $?"
