The file is groups.c from the Linux Kernel, circa sometime before 2015: https://github.com/torvalds/linux/blob/8f6c5ffc8987f4f5b5a3e9d557d94bbf3a9bf216/kernel/g

The file is groups.c from the Linux Kernel, circa sometime before 2015: https://github.com/torvalds/linux/blob/8f6c5ffc8987f4f5b5a3e9d557d94bbf3a9bf216/kernel/groups.c https://github.com/torvalds/linux/blob/8f6c5ffc8987f4f5b5a3e...