从Perl中的命令获取返回代码和输出

发布时间：2020-12-15 21:53:56 所属栏目：大数据来源：网络整理

我正在尝试编写一个实用程序,它将通过一个看起来像这样的文件：

# Directory | file name | action | # of days without modification to the file for the command to take action
/work/test/|a*|delete|1
/work/test/|b*|compress|0
/work/test/|c*|compress|1

我的脚本将通过文件决定是否,例如,/ work / test /下的文件以’a’开头,在过去1天内没有被修改过,如果有,它会删除它们.

为此,我使用find命令.例：

my $command = "find " . $values[0] . $values[1] . " -mtime +" . $values[3] . " -delete ;n";
system ($command);

但是,我被要求检索每个步骤的返回码,以验证每个步骤是否正常.

现在,我知道system()返回返回代码,反引号返回输出.但是,我怎样才能得到两者？

解决方法

运行反引号后,返回代码在 $?中可用.

$?

The status returned by the last pipe close,backtick (“) command,successful call to wait() or waitpid(),or from the system() operator. This is just the 16-bit status word returned by the traditional Unix wait() system call (or else is made up to look like it).

$output = `$some_command`;
print "Output of $some_command was '$output'.n";
print "Exit code of $some_command was $?n";

（编辑：李大同）

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