When 'w' finds an IP address in the ut_host field, it attempts to do
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
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svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=9573
@ -77,6 +77,9 @@ static char sccsid[] = "@(#)w.c 8.4 (Berkeley) 4/16/94";
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#include <utmp.h>
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#include <vis.h>
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#include <arpa/nameser.h>
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#include <resolv.h>
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#include "extern.h"
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struct timeval boottime;
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@ -169,6 +172,11 @@ main(argc, argv)
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argc -= optind;
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argv += optind;
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if (!(_res.options & RES_INIT))
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res_init();
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_res.retrans = 2; /* resolver timeout to 2 seconds per try */
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_res.retry = 1; /* only try once.. */
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if ((kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf)) == NULL)
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errx(1, "%s", errbuf);
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