vmo_write - write bytes to the VMO
#include <zircon/syscalls.h>
zx_status_t zx_vmo_write(zx_handle_t handle, const void* buffer,
uint64_t offset, size_t buffer_size);
vmo_write() attempts to write exactly buffer_size bytes to a VMO at offset.
buffer pointer to a user buffer to write bytes from.
buffer_size number of bytes to attempt to write.
zx_vmo_write() returns ZX_OK on success, and exactly buffer_size bytes will have been written from buffer. In the event of failure, a negative error value is returned, and the number of bytes written from buffer is undefined.
ZX_ERR_BAD_HANDLE handle is not a valid handle.
ZX_ERR_WRONG_TYPE handle is not a VMO handle.
ZX_ERR_ACCESS_DENIED handle does not have the ZX_RIGHT_WRITE right.
ZX_ERR_INVALID_ARGS buffer is an invalid pointer or NULL.
ZX_ERR_NO_MEMORY Failure to allocate system memory to complete write.
ZX_ERR_OUT_OF_RANGE offset starts at or beyond the end of the VMO, or VMO is shorter than buffer_size.
ZX_ERR_BAD_STATE VMO has been marked uncached and is not directly writable.
vmo_create, vmo_clone, vmo_read, vmo_get_size, vmo_set_size, vmo_op_range. vmo_set_cache_policy