HelenOS sources

vfs_op_write      226 uspace/srv/vfs/vfs.h extern errno_t vfs_op_write(int fd, aoff64_t, size_t *out_bytes);
vfs_op_write      314 uspace/srv/vfs/vfs_ipc.c 	errno_t rc = vfs_op_write(fd, pos, &bytes);