fusego/writev.go

30 lines
512 B
Go

package fuse
import (
"syscall"
"unsafe"
)
func writev(fd int, packet [][]byte) (n int, err error) {
iovecs := make([]syscall.Iovec, 0, len(packet))
for _, v := range packet {
if len(v) == 0 {
continue
}
vec := syscall.Iovec{
Base: &v[0],
}
vec.SetLen(len(v))
iovecs = append(iovecs, vec)
}
n1, _, e1 := syscall.Syscall(
syscall.SYS_WRITEV,
uintptr(fd), uintptr(unsafe.Pointer(&iovecs[0])), uintptr(len(iovecs)),
)
n = int(n1)
if e1 != 0 {
err = syscall.Errno(e1)
}
return
}