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From: kjh@pollux.usc.edu (Kenneth J. Hendrickson)
Newsgroups: comp.unix.wizards
Subject: Re: sockets
Keywords: sockets, primer
Message-ID: <24957@usc.edu>
Date: 28 May 90 10:44:03 GMT
References: <24943@usc.edu> <102572@convex.convex.com>
Sender: news@usc.edu
Organization: EE-Systems, Univ. of So. Calif., Los Angeles
Lines: 19

After much debugging (about 12 hours or so), I have discovered that I am
pushing bytes through the sockets that I have created as expected, but
there is a small problem.

read(socket, buf, sizeof(buf)) is always returning sizeof(buf), even
though that many characters weren't necessarily read into buf.  The man
pages say something about ioctl(), and using "STREAMS message-nondiscard"
mode, but I can't figure out how to do this.  If I can get read() to
return the correct value (the number of bytes actually read from the
socket), then I feel I will be 98% done with the debugging of my
program.  Please help.  If you know how to make read() work correctly,
please let me know.  Thanks.

P.S.	The sockets are AF_UNIX and SOCK_STREAM.  They are created,
bind()ed with a path name, listen()ing for a connection, connect()ed to,
accept()ing a connection, and bytes go across both ways just like they
should.  However, read() doesn't work right as described above.

Ken Hendrickson N8DGN/6      kjh@usc.edu      ...!uunet!usc!pollux!kjh