#endif
/* Write LEN bytes at PTR to descriptor DESC, retrying if interrupted.
- Return LEN upon success, write's (negative) error code otherwise. */
+ Return LEN upon success, write's (negative) error code otherwise.
+ As the name implies, this function writes all LEN bytes and returns
+ LEN or it fails and returns the negative value returned by the (final)
+ failing write. */
int
full_write (desc, ptr, len)