configure FreeBSD so that various databases such as passwd and group can be
looked up using flat files, NIS, or Hesiod.
= Hesiod has been added to libc (see hesiod(3)).
= A library routine for parsing nsswitch.conf and invoking callback
functions as specified has been added to libc (see nsdispatch(3)).
= The following C library functions have been modified to use nsdispatch:
. getgrent, getgrnam, getgrgid
. getpwent, getpwnam, getpwuid
. getusershell
. getaddrinfo
. gethostbyname, gethostbyname2, gethostbyaddr
. getnetbyname, getnetbyaddr
. getipnodebyname, getipnodebyaddr, getnodebyname, getnodebyaddr
= host.conf has been removed from src/etc. rc.network has been modified
to warn that host.conf is no longer used at boot time. In addition, if
there is a host.conf but no nsswitch.conf, the latter is created at boot
time from the former.
Obtained from: NetBSD
in source input if the -f flag is used, and modify Makefile.yp to only
use -f for the passwd, master.passwd and group maps. These should be
the only ones for which the + and - characters have special meaning
that make it important for us to avoid letting them into any of the map
databases. In some cases (namely the automounter maps) we have to allow
at least the - character through in order to create the map properly.
This closes PR #8699.
- Sort xrefs.
- FreeBSD.ORG -> FreeBSD.org
- Be consistent with section names as outlined in mdoc(7).
- Other misc mdoc cleanup.
PR: doc/13144
Submitted by: Alexey M. Zelkin <phantom@cris.net>
This really fixes the condition where a child creates children of its own.
I'm leaving the previous sanity tests in though, since they shouldn't hurt,
and will give an indication if this ever happens again.
try to fork() a child of its own, which could result in several children
ypservs running at once. I'm still not sure exactly what leads to this
condition, but these fixes should stop it from causing trouble. A new
function, yp_fork() checks to see if the current process is already a
child of the parent ypserv, and returns failure (and logs an error message)
rather than spawning another child.
Under certain conditions (possibly associated with heavy load), ypserv will
fork() child processes that don't exit like they're supposed to. I think
this is because of some suspect logic in the ypproc_all procedure. I updated
it to use what I hope is a more bulletproof approach.
Also tweaked yp_svc_run() a little so that the 'are we a child?' test happens
at every pass through the for(;;) loop, not just immediately after returning
from svc_getreqset2().
to be clever by avoiding the 'check all domains in the search list'
cycle in certain cases, but this would lose if handed a name like
"foo.ctr" which refers to an FQDN of "foo.ctr.columbia.edu". If
"columbia.edu" is in the search list in /etc/resolv.conf then the
DNS lookup code should resolve it, but it didn't.
(a.k.a. /var/yp/Makefile.dist) refers to an obsoleted usage of the
-m option of rpc.yppasswdd. It is currently taken over by the -t
option. -m is used for a different purpose now.
PR: 7279
Reviewed by: phk
Submitted by: Amakawa Shuhei <amakawa@nebula.sf.t.u-tokyo.ac.jp>
a buffer overflow, but might negatively impact those hosts who have
enough aliases to fill MAXHOSTNAMELEN * 2 characters in them.
Good candidate for merging back into -stable. Lightly tested by me, but
it came from OpenBSD a while ago.
Obtained from: OpenBSD
I will not commit late at night. I will not commit late at night.
I swear it's been Monday all week for me.
Apply proper fix for services target submitted by Andre Albsmeier
<andre.albsmeier@mchp.siemens.de>. Sorry for botching this that last
time, Andre. (Could have been worse: t least I didn't break the build.)
/etc/services entries with any protocol instead of just udp and tcp.
Rather thani having the awk script explicitly search for 'udp' or 'tcp'
in the second field using index(), use split() to break up the field
at the '/' character if it exists, which extracts the protocol from
the field no matter what it is.
PR: 2206
underlying database code works. When dealing with first/next queries, you
have the notion of a database 'cursor,' which is essentially a file pointer
for the database. To select the first entry, you do a fetch with the
R_FIRST flag set, then you can use the R_NEXT flag to enumerate the other
entries in the database. Unfortunately, doing a direct fetch with no flag
does _not_ set the 'cursor,' so you can't do a direct fetch and then
enumerate the table from there.
The bug is that cached handles generated as the result of a YPPROC_MATCH
were being treated as though they were the same as handles generated by
a YPPROC_FIRST, which is not the case. The manifestation is that if you
do a 'ypmatch first-key-in-map map' followed by a yp_first()/yp_next()
pair, the yp_first() and yp_next() both return the first key in the
table, which makes the entry appear to be duplicated.
A couple smaller things since I'm here:
- yp_main.c and yp_error.c both have a global 'int debug' in them.
For some reason, our cc/ld doesn't flag this as a multiply defined
symbol even though it should. Removed the declaration from yp_main.c;
we want the one in yp_error.c.
- The Makefile wasn't installing ypinit in the right place.
/tmp/ypmake, thereby fixing problems with successive map updates
possibly reading stale copies of this file left behind by a previous
failed run.
PR: 5571
to work on FreeBSD, man page written by me.)
Also change Makefile.yp a little to be more tolerane in the face of
missing source files. Print a message if we can't find /var/yp/master.passwd
telling the user what to do to fix things.
at the end of gethostanswer()/getanswer()/whatever where it used to
return TRY_AGAIN. This breaks the domain list traversal in ypserv's
async DNS lookup module: it would only retry using the domain(s) from
the 'domain' or 'search' lines in /etc/resolv.conf if __dns_getanswer()
returned TRY_AGAIN.
Changed the test so that either TRY_AGAIN or NO_RECOVERY will work.
This seemed to me the best solution in the event somebody tries to
compile this code on an older system with a different version of BIND.
(You shouldn't do that of course, but then there's a lot of things
in the world that you shouldn't do and people do them anyway.)
is not sane: if the TTL on a pending but unanswered query hits 0 and the
circular queue entry is removed and free()d, the for() loop may still try
to use the entry pointer (which now points at no longer valid memory).
usually, deleting only the last entry off the end of the queue worked, but
if more than one was deleted, the server would crash. I changed things a
bit so this shouldn't happen anymore.
Also arranged to call the prune routine a bit more often.
we decide to do a DNS lookup, we NUL terminate the key string provided
by the client before passing it into the DNS lookup module. This is
actually wrong. Assume the key is 'foo.com'. In this case, key.keydat_val
will be "foo.com" and key.keydat_len will be 7 (seven characters; the
string is not NUL-terminated so it is not 8 as you might expect).
The string "foo.com" is actually allocated by the XDR routines when the
RPC request is decoded; exactly 7 bytes are allocated. By adding a NUL,
the string becomes "foo.com\0", but the '\0' goes into an 8th byte which
was never allocated for this string and which could be anywhere. The result
is that while the initial request may succeed, we could trash other
dynamically allocated structures (like, oh, I dunno, the circular map
cache queue?) and SEGV later. This is in fact what happens.
The fix is to copy the string into a larger local buffer and NUL-terminate
that buffer instead.
Crash first reported by: Ricky Chan <ricky@come.net.uk>
Bug finally located with: Electric Fence 2.0.5
in the transfer request actually exist. Technically ypxfr can do this too,
but why waste the cycles getting ypxfr off the ground for a transfer we
already know is going to fail.
Also apply stricter access control rules; ypproc_xfr_2_svc() is in a
different class than the normal map access procedures procedures.
