This fixes an apparent bug in fingerd w/the NetKit-B 0.5 distribution and
below. The bug shows up when a finger like "finger @@@@@@@@@@" is done.
fingerd will spawn a new finger process for every consecutive @. This is
because the user name is parsed out by taking everything from the last @ on
and passing it to fingerd. This also allows finger redirection in the form
of finger
[email protected]@tsx-11.mit.edu. That will finger
root@sunsite through tsx-11 as long as each of the involved systems is
affected by the bug. (They are). This seems to stem from the BSD net kit
from which the linux one is based. I don't know how far this goes as far as
commercial unixes go, but everything we tried except Ultrix 4.3 has this
problem. Unixes tried: Solaris, SunOs, IRIX, AIX, FreeBSD, Linux
(Slackware), and Ultrix 4.2A.
Clayton O'Neill
[email protected]
[email protected]
--- finger.old/net.c Tue Aug 23 03:46:19 1994
+++ net.c Fri Nov 18 17:07:38 1994
@@ -57,12 +57,16 @@
struct servent *sp;
struct sockaddr_in sin;
int s;
- char *alist[1], *host, *rindex();
+ char *alist[1], *at, *host, *rindex();
u_long inet_addr();
- if (!(host = rindex(name, '@')))
+ if (!(at = index(name, '@')))
return;
- *host++ = '\0';
+ *at++ = '\0';
+ if (!(host = rindex(at, '@')))
+ host=at;
+ else
+ host++;
if (!(hp = gethostbyname(host))) {
defaddr.s_addr = inet_addr(host);
if (defaddr.s_addr == -1) {
