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Block SIGHUP during call to gethostbyaddr().

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PR: 5548
Reviewed by: Matthew Dillon <dillon@apollo.backplane.com>
Obtained from: OpenBSD
This commit is contained in:
Chris Timmons 1998-12-28 00:39:14 +00:00
parent 240d6d79b1
commit 65f14c0055
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=42114
1 changed files with 6 additions and 1 deletions
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7
usr.sbin/syslogd/syslogd.c
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@ -42,7 +42,7 @@ static const char copyright[] =
static char sccsid[] = "@(#)syslogd.c 8.3 (Berkeley) 4/4/94";
#endif
static const char rcsid[] =
"$Id: syslogd.c,v 1.42 1998/11/05 10:51:21 dg Exp $";
"$Id: syslogd.c,v 1.43 1998/12/04 06:49:20 jkh Exp $";
#endif /* not lint */
/*
@ -1066,6 +1066,7 @@ cvthname(f)
struct sockaddr_in *f;
{
struct hostent *hp;
sigset_t omask, nmask;
char *p;
dprintf("cvthname(%s)\n", inet_ntoa(f->sin_addr));
@ -1074,8 +1075,12 @@ cvthname(f)
dprintf("Malformed from address\n");
return ("???");
}
sigemptyset(&nmask);
sigaddset(&nmask, SIGHUP);
sigprocmask(SIG_BLOCK, &nmask, &omask);
hp = gethostbyaddr((char *)&f->sin_addr,
sizeof(struct in_addr), f->sin_family);
sigprocmask(SIG_SETMASK, &omask, NULL);
if (hp == 0) {
dprintf("Host name for your address (%s) unknown\n",
inet_ntoa(f->sin_addr));