github.com/demonoid81/moby@v0.0.0-20200517203328-62dd8e17c460/daemon/graphdriver/copy/copy_cgo.go (about) 1 // +build linux,cgo 2 3 package copy // import "github.com/demonoid81/moby/daemon/graphdriver/copy" 4 5 /* 6 #include <linux/fs.h> 7 8 #ifndef FICLONE 9 #define FICLONE _IOW(0x94, 9, int) 10 #endif 11 */ 12 import "C" 13 import ( 14 "os" 15 16 "golang.org/x/sys/unix" 17 ) 18 19 func fiClone(srcFile, dstFile *os.File) error { 20 _, _, err := unix.Syscall(unix.SYS_IOCTL, dstFile.Fd(), C.FICLONE, srcFile.Fd()) 21 return err 22 }