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From: j@uriah.heep.sax.de (J Wunsch)
Newsgroups: comp.unix.bsd.freebsd.misc
Subject: Re: socket client pgm read() fail!
Date: 21 Jan 1997 23:31:22 GMT
Organization: Private BSD site, Dresden
Lines: 27
Message-ID: <5c3jka$mtn@uriah.heep.sax.de>
References: <5c238o$4hb@ustsu10.ust.hk>
Reply-To: joerg_wunsch@uriah.heep.sax.de (Joerg Wunsch)
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Xref: euryale.cc.adfa.oz.au comp.unix.bsd.freebsd.misc:34409
eekhpang@uxmail.ust.hk (Pang Kin Hung) wrote:
> if ((n=recv(s, buf, n,0))<0){
> printf("read failed\n"); <--------- always fails
> printf("n=%d\n",n);
> exit(1);
> }
You should have used -Wall. :-)
``n'' has been used uninitialized. Replace it by `sizeof buf', and
you're going.
Btw, bzero and bcopy should not be used in favor of memset and memcpy
which are ANSI/ISO C. Also, your test program is missing some header
files (like unistd.h).
Final hint: in such an error message, at least print the value of the
global variable errno (#include <errno.h>). This might help you
tracking down the problem.
--
cheers, J"org
joerg_wunsch@uriah.heep.sax.de -- http://www.sax.de/~joerg/ -- NIC: JW11-RIPE
Never trust an operating system you don't have sources for. ;-)