How does a child process work on its own directory?
php小编柚子在这篇文章中将为大家介绍子进程如何在自己的目录上工作。子进程是由父进程创建的,它们共享父进程的资源。在某些情况下,我们希望子进程能够在自己的目录上独立工作,而不是与父进程共享目录。这样可以提高程序的安全性和可靠性。在接下来的内容中,我们将探讨如何让子进程在自己的目录上工作,并提供一些实际的示例和技巧。让我们一起来看看吧!
问题内容
考虑一个运行另一个 exe 文件的 Go 程序:
command := exec.Command("C:\\myapplication.exe") if err := command.Run(); err != nil { }
并考虑 myapplication.exe 包含以下代码段:
os.Create("generatedfile.txt")
问题是 generatedfile.txt 是在父进程的目录中创建的,而不是在子进程的目录(C:\)中创建的。 应该怎样做才能将控制权转移到子进程,以便在子进程的目录中创建文件而不更改 os.Create 中的字符串(即 generatedfile.txt)?
解决方法
exec Cmd.Dir 文档说:
应用程序未设置 command.Dir
,因此子进程在调用进程的当前目录中运行。
要解决此问题,请将 command.Dir
设置为要运行子进程的目录。
command := exec.Command("C:\\myapplication.exe") command.Dir = "C:\\some\\directory" if err := command.Run(); err != nil { } f, err := os.Create("generatedfile.txt") // file is created in C:\some\directory\generatedfile.txt
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