fdop.h\process\src - musl - musl - an implementation of the standard library for Linux-based systems

#define FDOP_CLOSE 1
#define FDOP_DUP2 2
#define FDOP_OPEN 3
struct fdop {
	struct fdop *next, *prev;
	int cmd, fd, srcfd, oflag;
	mode_t mode;
	char path[];
};