inetd loses track of waiting servers when reconfiguring

[John T Kohl]

Index:	etc/inetd.c 4.3BSD

Description:
	If inetd is waiting for a datagram-server to exit when it is
	reconfigured via SIGHUP, it will lose the pid of the datagram
	server and eventually becomes deaf to that service when the
	server exits.

Repeat-By:
	Set up inetd to listen on behalf of a long-lived udp-based
	service.  While the server is active, reconfigure inetd with
	SIGHUP. Let the udp-based server exit.  inetd will be deaf to
	that service, and packets will accumulate on the listening
	socket (use netstat -a to take a look). 

Fix:
	Install this patch: (your line numbers probably differ)

*** inetd.c.old	Fri Jun  3 11:29:26 1988
--- inetd.c	Fri Jun  3 11:28:56 1988
***************
*** 383,390 ****
  			int i;
  
  			omask = sigblock(SIGBLOCK);
! 			if (cp->se_bi == 0)
! 				sep->se_wait = cp->se_wait;
  #define SWAP(a, b) { char *c = a; a = b; b = c; }
  			if (cp->se_user)
  				SWAP(sep->se_user, cp->se_user);
--- 383,401 ----
  			int i;
  
  			omask = sigblock(SIGBLOCK);
! 			if (cp->se_bi == 0) {
! 			    /* sep->se_wait may be holding a
! 			       process ID of a running daemon we are
! 			       waiting for.  If so, don't nuke it unless
! 			       we are instructed now not to wait.
! 			       sep->se_wait == 1 if we should wait and
! 			       there is no process.
! 			       == 0 if we don't wait
! 			       == pid if we are currently waiting.
! 			       */
! 			    if ((sep->se_wait == 1) || (cp->se_wait == 0))
! 				    sep->se_wait = cp->se_wait;
! 			}
  #define SWAP(a, b) { char *c = a; a = b; b = c; }
  			if (cp->se_user)
  				SWAP(sep->se_user, cp->se_user);
----
John Kohl
MIT/Project Athena