-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 3/13/11 03:16 , briand@aracnet.com wrote:
ghc: fdWriteBuf: resource vanished (Broken pipe)
which make sense, sort of. I write a value, let's say 10, and the reader reads it. It's the last value so it "closes" the fifo.
Now there's nothing reading, so when I get to threadWaitWrite, I would expect the program to wait, just as it does when it starts up and there is no reader.
FIFOs don't work that way; like a regular pipe, once all readers go away it doesn't work any more. You need to open it read-write initially to keep a reader around. Haskell has no control over this: it's how they're defined to work. In general, trying to use a FIFO like an AF_UNIX socket is a mistake. - -- brandon s. allbery [linux,solaris,freebsd,perl] allbery.b@gmail.com system administrator [openafs,heimdal,too many hats] kf8nh -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (Darwin) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAk19tqkACgkQIn7hlCsL25VxGwCgsInAy4YJhOA2Ca/tQTRd0Cjs NmAAn2hjqtQm0/eZXVoLM8GMCMv+yxR4 =SDd8 -----END PGP SIGNATURE-----