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When -n is specified, don't make bogus DNS queries. Instead,

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when -n is specified more than once, hostnames stored in utmp
are attempted to resolve to display them as network addresses.

PR:		212272
This commit is contained in:
Hajimu UMEMOTO 2016-09-02 18:28:14 +00:00
parent fd50a70770
commit 2279a9a428
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=305289
2 changed files with 7 additions and 3 deletions
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4
usr.bin/w/w.1
View file

@ -85,6 +85,10 @@ default
Do not attempt to resolve network addresses (normally
.Nm
interprets addresses and attempts to display them as names).
When
.Fl n
is specified more than once, hostnames stored in utmp are attempted to
resolve to display them as network addresses.
.El
.Pp
If one or more

6
usr.bin/w/w.c
View file

@ -180,7 +180,7 @@ main(int argc, char *argv[])
nlistf = optarg;
break;
case 'n':
nflag = 1;
nflag += 1;
break;
case 'f': case 'l': case 's': case 'u': case 'w':
warnx("[-flsuw] no longer supported");
@ -378,12 +378,12 @@ main(int argc, char *argv[])
lsin->sin_family = AF_INET;
isaddr = 1;
}
if (!nflag) {
if (nflag == 0) {
/* Attempt to change an IP address into a name */
if (isaddr && realhostname_sa(fn, sizeof(fn), sa,
sa->sa_len) == HOSTNAME_FOUND)
p = fn;
} else if (!isaddr) {
} else if (!isaddr && nflag > 1) {
/*
* If a host has only one A/AAAA RR, change a
* name into an IP address