问题
I'm new to Go, have a bit of a problem with reading default file permissions / system mask. Of course I can specify fixed permissions:
f, err := os.OpenFile(fpath, os.O_CREATE|os.O_WRONLY, 0600)
But I would like the program to behave nicely and open a file with user's account set umask. How can I do that?
回答1:
It already works like you want it.
Just use "0666" and the umask will be applied.
f, err := os.OpenFile(fpath, os.O_CREATE|os.O_WRONLY, 0666)
For me with umask 0022 I get:
$ go run x.go ; ls -l filename
-rw-r--r-- 1 ask wheel 0 May 24 00:18 filename
Use 0660 (for example) if you always want the file to be unreadable by "other", no matter the umask.
来源：https://stackoverflow.com/questions/23842247/reading-default-filemode-when-using-os-o-create