Path: utzoo!utgpu!water!watmath!clyde!rutgers!mcnc!ncsuvx!lll-winken!lll-crg.llnl.gov!casey
From: casey@lll-crg.llnl.gov (Casey Leedom)
Newsgroups: comp.bugs.2bsd
Subject: Re: select() problems with 2.10 BSD
Keywords: inetd, select, socket, accept, hang, help!
Message-ID: <2722@lll-winken.llnl.gov>
Date: 11 Jan 88 17:54:54 GMT
References: <1756@rayssd.RAY.COM>
Sender: usenet@lll-winken.llnl.gov
Reply-To: casey@lll-crg.llnl.gov.UUCP (Casey Leedom)
Organization: Lawrence Livermore National Laboratory
Lines: 63

In article <1756@rayssd.RAY.COM> gmp@rayssd.RAY.COM (Gregory M. Paris) writes:
> Is anybody else having problems with select on 2.10 BSD? ... Select
> reports [in inetd] that all are ready for reading, yet none are.  This
> causes inetd to hang in accept forever.

  Keith posted a fix to selscan which may be causing your problem.  Since
the fix was so short I'll repeat it here.  (Keith, Do we have an archive site
for 2.10BSD bug postings that people can get to anonymously?)

Casey

This is 2.10BSD bug posting V1/8:
-----
Subject: selscan routine is wrong
Index: sys/sys_generic.c 2.10BSD

Description:
	The selscan routine works erratically, at best, if UCB_NET
	is defined.
Repeat-By:
	Use the select(2) call.
Fix:
	Apply the following patch to sys_generic.c.

*** sys_generic.c.old	Sat Oct 17 15:56:15 1987
--- sys_generic.c	Sat Oct 17 16:14:29 1987
***************
*** 326,338 ****
  	int flag;
  	struct file *fp;
  	int n = 0;
! 	int (*selroutine)();
! 
  #ifdef UCB_NET
! 	int soo_select(), ino_select();
! 	selroutine = (fp->f_type == DTYPE_SOCKET) ? soo_select : ino_select;
  #else
- 	int ino_select();
  	selroutine = ino_select;
  #endif
  	for (which = 0; which < 3; which++) {
--- 326,335 ----
  	int flag;
  	struct file *fp;
  	int n = 0;
! 	int (*selroutine)(), ino_select();
  #ifdef UCB_NET
! 	int soo_select();
  #else
  	selroutine = ino_select;
  #endif
  	for (which = 0; which < 3; which++) {
***************
*** 356,361 ****
--- 353,361 ----
  					u.u_error = EBADF;
  					break;
  				}
+ #ifdef UCB_NET
+ 				selroutine = (fp->f_type == DTYPE_SOCKET) ? soo_select : ino_select;
+ #endif
  				if ((*selroutine)(fp, flag)) {
  					FD_SET(i + j, &obits[which]);
  					n++;