英文:
How to create a directory that has specific permissions
问题
我正在尝试使用Go语言创建一个具有特定权限的目录。
我需要 drwxrwxr-x 权限，但我不知道如何在 os.Mkdir() 中实现。
我尝试过 os.ModeDir、os.ModePerm 和 os.ModeSticky。
我在Linux上工作，不在乎解决方案是否适用于Windows。它可以适用，但不一定要求。
我的问题是，我正在尝试创建一个在程序内部后续使用的目录（程序创建目录，并将文件写入其中）。
英文:
I'm trying to create a directory in Go with very specific permissions.
I need drwxrwxr-x but I don't know how to do it with os.Mkdir().
I've tried os.ModeDir, os.ModePerm and os.ModeSticky
I'm on linux and I do not care if the solution will work in windows. it can, but it doesn't have to.
My issue is that I'm trying to create a directory that is later used within the program itself (the program creates the directory and it uses it to write files to).
答案1
得分: 1
引用自 https://stackoverflow.com/a/59963154/1079543 的内容：
> 所有程序都在一个umask设置下运行...这是系统将自动从文件和目录创建请求中删除的权限集合。
在启动程序时将umask设置为0会产生您所期望的结果：
//go:build unix
package main
import (
"log"
"os"
"golang.org/x/sys/unix"
)
func main() {
unix.Umask(0)
if err := os.Mkdir("dirname", 0775); err != nil {
log.Fatalf("failed to create directory: %v", err)
}
}
根据 https://pkg.go.dev/cmd/go#hdr-Build_constraints ，//go:build unix 应为真，"如果GOOS是Unix或类Unix系统"。
以前的做法是使用 syscall.Umask(0)。根据 https://go.googlesource.com/proposal/+/refs/heads/master/design/freeze-syscall.md ，该包现在已被弃用。
英文:
To quote https://stackoverflow.com/a/59963154/1079543:
> all programs run with a umask setting...the set of permissions that the system will automatically remove from file and directory creation requests.
Setting the umask to 0 when you start the program produces the result you're looking for:
//go:build unix
package main
import (
"log"
"os"
"golang.org/x/sys/unix"
)
func main() {
unix.Umask(0)
if err := os.Mkdir("dirname", 0775); err != nil {
log.Fatalf("failed to create directory: %v", err)
}
}
//go:build unix should be true "if GOOS is a Unix or Unix-like system" per: https://pkg.go.dev/cmd/go#hdr-Build_constraints
The old way to do this was with syscall.Umask(0). This package is now deprecated per: https://go.googlesource.com/proposal/+/refs/heads/master/design/freeze-syscall.md
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