进行系统调用以将stdout输出作为字符串返回 [英] Making a system call that returns the stdout output as a string

问题描述

Perl和PHP使用反引号进行此操作.例如，

Perl and PHP do this with backticks. For example,

$output = `ls`;

返回目录列表.类似的函数system("foo")返回给定命令foo的操作系统返回码.我说的是一个变体，它将foo输出的所有内容返回到stdout.

Returns a directory listing. A similar function, system("foo"), returns the operating system return code for the given command foo. I'm talking about a variant that returns whatever foo prints to stdout.

其他语言如何做到这一点?此功能有规范名称吗? (我要使用反引号"；尽管也许我可以投币"syslurp".)

How do other languages do this? Is there a canonical name for this function? (I'm going with "backtick"; though maybe I could coin "syslurp".)

推荐答案

Perl:

$output = `foo`;

添加:这确实是一条多路领带.上面的代码也是有效的PHP，例如Ruby，也使用相同的反引号.

ADDED: This is really a multi-way tie. The above is also valid PHP, and Ruby, for example, uses the same backtick notation as well.

这篇关于进行系统调用以将stdout输出作为字符串返回的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！