search for: select_write

...040 select_stuff::poll: returning 0 14:05:17 [main] rsync 4040 select_stuff::cleanup: calling cleanup routines 14:05:17 [main] rsync 4040 select_stuff::~select_stuff: deleting select records 14:05:17 [main] rsync 4040 cygwin_select: 2, 0x0, 0x22D9A0, 0x0, 0x22D990 14:05:17 [main] rsync 4040 dtable::select_write: fd 1 14:05:17 [main] rsync 4040 cygwin_select: to->tv_sec 60, to->tv_usec 0, ms 60000 14:05:17 [main] rsync 4040 cygwin_select: sel.always_ready 0 14:05:17 [main] rsync 4040 select_stuff::wait: m 2, ms 60000 14:06:17 [main] rsync 4040 select_stuff::wait: timed out 14:06:17 [main] rsync 404...

...tuff: deleting select records 51 8512898 [main] rsync 5052 writev: writev (4, 0x228064, 1) 32 8512930 [main] rsync 5052 writev: 4 = write (4, 0x228064, 1), errno 0 30 8512960 [main] rsync 5052 cygwin_select: 5, 0x0, 0x2284D4, 0x2284C4, 0x2284BC 53 8513013 [main] rsync 5052 dtable::select_write: fd 4 27 8513040 [main] rsync 5052 dtable::select_except: fd 4 28 8513068 [main] rsync 5052 cygwin_select: to->tv_sec 60, to->tv_usec 0, ms 60000 27 8513095 [main] rsync 5052 cygwin_select: sel.always_ready 0 52 8513147 [main] rsync 5052 start_thread_socket: stuff_start 0x2...

...13215 [main] rsync 2036 fhandler_base::set_flags: O_TEXT/O_BINARY set in ...skipping... 096) 193 29378730 [main] rsync 2036 writev: 4096 = write (1, 0x226AC0, 1), errno 0 223 29378953 [main] rsync 2036 cygwin_select: 2, 0x0, 0x226B00, 0x0, 0x226AF0 382 29379335 [main] rsync 2036 dtable::select_write: /dev/pipew fd 1 182 29379517 [main] rsync 2036 cygwin_select: to->tv_sec 60, to->tv_usec 0, ms 60000 238 29379755 [main] rsync 2036 cygwin_select: sel.always_ready 1 1457 29381212 [main] rsync 2036 select_stuff::cleanup: calling cleanup routines 214 29381426 [main] rsync 2036...

Hi, I got a new Cyberpower 1500AVR UPS and nut wouldn't work. It failed to detect the UPS and a strace showed that all writes to the serial port were failing with -EAGAIN. The attached patch disabled nonblocking mode on the serial port and now it works fine. Is there a reason the port was put in non-blocking mode? There's no code I could find to deal with the inevitable -EAGAIN that