gethostbyname_r(3) may fail to lookup hostname alias over MAXALIASES(>35)

[Takehiko NOZAKI]

recent MFC of gethostent_r(3) <<cset:ff9a0f5>> eliminate limitation of MAXALIASES in /etc/hosts. but gethostbyname_r(3) is still restricted.

$ grep host /etc/hosts
192.0.2.1       host00 host01 host02 host03 host04 host05 host06 host07 host08 host09 \
                host10 host11 host12 host13 host14 host15 host16 host17 host18 host19 \
                host20 host21 host22 host23 host24 host25 host26 host27 host28 host29 \
                host30 host31 host32 host33 host34 host35 host36
$ ping host36
ping: Cannot resolve "host36" (Unknown host)

[Takehiko NOZAKI]

gethostbyname_r(3) still uses static allocated buffer by MAXALIASES.

153 struct hostent *
154 _hf_gethtbyname2(const char *name, int af, struct getnamaddr *info)
155 {
...
160     char *aliases[MAXALIASES];
...
187         hp = gethostent_r(hf, info->hp, info->buf, info->buflen,
188             info->he);
...
205             for (anum = 0; hp->h_aliases[anum]; anum++) {
206                 if (anum >= __arraycount(aliases))
207                     goto nospc;
208                 HENT_SCOPY(aliases[anum], hp->h_aliases[anum],
209                     ptr, len);
210             }
...

[Takehiko NOZAKI]

BUGFIX: Issue #89 - gethostbyname_r(3) may fail to lookup hostname alias over MAXALIASES(>35).

→ <<cset f2109446e7a6>>