File Permissions
Explore how to work with file permissions in C++17 using the std::filesystem library. Understand how to retrieve permissions, modify them with functions like status and permissions, and handle platform-specific considerations such as Windows' limited permission support.
We'll cover the following...
We'll cover the following...
Permission Functions
We have two major functions related to file permissions:
std::filesystem::status()andstd::filesystem::permissions()
The first one returns file_status which contains information about the file type and also its permissions.
And you can use the second function to modify the file permissions. For example, to change a file to be read-only.
std::filesystem::perms
File permissions - std::filesystem::perms - it’s an enum class that represents the following values:
| Name | Value (octal) | POSIX macro | Notes |
|---|---|---|---|
| none | 0000 | There are no permissions set for the file | |
| owner_read | 0400 | S_IRUSR |
Read permission, owner |
| owner_write | 0200 | S_IWUSR |
Write permission, owner |