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When 'w' finds an IP address in the ut_host field, it attempts to do

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a gethostbyname() on it.  That can take a long time...  (especially
if the reason the IP address is in there in the first place is because
login/rlogind/telnetd couldn't find it either....)
This patch reduces the gethostbyaddr lookup time to 2 seconds, the idea being
that if the local nameserver knows the answer, it'll answer within that time,
otherwise we dont care... :-)
This change doesn't do anything about whether or not w should do this in the
first place, but at least it will make the current behavior less painful.
Reviewed by:	David Greenman
This commit is contained in:
Peter Wemm 1995-07-18 05:07:02 +00:00
parent 7908b94389
commit 6367cd09b8
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=9573
1 changed files with 8 additions and 0 deletions
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8
usr.bin/w/w.c
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@ -77,6 +77,9 @@ static char sccsid[] = "@(#)w.c 8.4 (Berkeley) 4/16/94";
#include <utmp.h>
#include <vis.h>
#include <arpa/nameser.h>
#include <resolv.h>
#include "extern.h"
struct timeval boottime;
@ -169,6 +172,11 @@ main(argc, argv)
argc -= optind;
argv += optind;
if (!(_res.options & RES_INIT))
res_init();
_res.retrans = 2; /* resolver timeout to 2 seconds per try */
_res.retry = 1; /* only try once.. */
if ((kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf)) == NULL)
errx(1, "%s", errbuf);