during authentication. Thus we need to call getpwnam *after* the user
has been authenticated. Colin mentioned that we should also move the
check for root in that case.
are initialised to zero. When freeing TLS, don't attempt to free DTV
slots which were not used.
Pointed out by: Joerg Sonnenberger
X-MFC-After: After the branch, probably
5.0-RELEASE), a visually elusive bug was introduced. A comparison
operator was changed to assignment. As a result, rexecd behaved
always as if the `-i' option had been specified. It would allow root
logins. This commit corrects the situation in the obvious way.
A separate bug was introduced at the same time. The PAM library
functions are called between the invocation of getpwnam(3) and the use
of the returned static object. Since many PAM library functions
result in additional getpwnam(3) calls, the contents of the returned
static object could be changed from under rexecd. With this commit,
getpwnam_r(3) is used instead.
Other PAM-using applications should be reviewed for similar errors in
getpw* usage.
Security: rexecd's documented default policy of disallowing root
logins was not enforced.
Reviewed by: cperciva
LD_LIBMAP_DISABLE, LD_LIBRARY_PATH) are used, then make sure the
libraries being loaded aren't on a noexec-mounted filesystem.
This is a compromise position: I'm assuming that nobody will be silly
enough to set the noexec mount flag on part of the default library
path, in order to avoid adding extra overhead into the common case
(where those environment variables aren't used).
Discussed with: csjp, secteam
MFC after: 1 week
Another handy libmap patch. Lets you do stuff like this:
LD_LIBMAP="libpthread.so.1=libthr.so.1" mythreadedapp
If you already have a program-specific override in libmap.conf, note
that you must use a program-specific override in LD_LIBMAP:
LD_LIBMAP="[mythreadedapp],libpthread.so.1=libthr.so.1" mythreadedapp
PR: bin/74471
Submitted by: Dan Nelson <dnelson AT allantgroup.com>
MFC after: 2 weeks
The major change is to process STAT sent as an OOB command w/o
breaking the current data transfer. As a side effect, this gives
better error checking in the code performing data transfers.
A lesser, but in no way cosmetic, change is using the flag `recvurg'
in the only signal-safe way that has been blessed by SUSv3. The
other flag, `transflag,' becomes private to the SIGURG machinery,
serves debugging purposes only, and may be dropped in the future.
The `byte_count' global variable is now accounting bytes actually
transferred over the network. This can give status messages looking
strange, like "X of Y bytes transferred," where X > Y, but that has
more sense than trying to compensate for combinations of data formats
on the server and client when transferring ASCII type data. BTW,
getting the size of a file in advance is unreliable for a number of
reasons in the first place. See question 18.8 of the Infrequently
Asked Questions in comp.lang.c for details.
PR: bin/52072
Tested by: Nick Leuta (earlier versions), a stress-testing tool (final)
MFC after: 1 month
- Convert the (char *) cast+cast backs magic to
memcpy(3). Without this, the resulting code
is potentially risky with higher optimization
levels.
- Avoid same name when calling local variables,
as well as global symbols. This reduces
confusion for both human and compiler.
- Add necessary casts, consts
- Use new style function defination.
- Minor style.Makefile(5) tweak
- Bump WARNS?= from 0 to 6
** for the aout code: changes are intentionally limited
to ease maintaince.
build over two years ago by peter.
The binary a.out version of ld.so can be obtained from misc/compat22 or
src/lib/compat/compat22.
Discussed on: -arch
Voted yes: jhb, ru, linimon, delphij
When in inetd mode, this prevents bogus messages from
appearing on the control channel. When running as a
daemon, we shouldn't write to the terminal we used to
have at all.
PR: bin/74823
MFC after: 1 week
Log it once at the beginning of the session instead. OTOH, log wd each
time for the sake of better auditing and consistent log format.
Proposed by: Nick Leuta <skynick -at- mail.sc.ru>
add the working directory pathname to the log message if any of
such arguments isn't absolute. This has advantage over the old
way of logging that an admin can see what users are actually trying
to do, and where. The old code was also not too robust when it
came to a chrooted session and an absolute pathname.
Pointed out by: Nick Leuta
MFC after: 2 weeks
In the old world (as the surrounding comment in makefile says), there
was the /usr/libexec/ld-elf.so.1 binary which is now a symlink to
/libexec/ld-elf.so.1. To symlink, we need to make sure that the
_target_ (and the target is /usr/libexec/ld-elf.so.1) doesn't have
"schg" flag set. A real solution is to protect the chflags call only if
target exists, like we do in usr.bin/tip/tip/Makefile.
Requested by: ru
If turned on no NIS support and related programs will be built.
Lost parts rediscovered by: Danny Braniss <danny at cs.huji.ac.il>
PR: bin/68303
No objections: des, gshapiro, nectar
Reviewed by: ru
Approved by: rwatson (mentor)
MFC after: 2 weeks
The size_t type is better suited for that, particularly because
the "blksize" argument is to be passed to malloc() and read().
On 64-bit archs it's more to a style issue, but the good style
of coding in C is also important.
to PRECIOUSLIB from bsd.lib.mk. The side effect of this
is making installing the world under jail(8) possible by
using another knob, NOFSCHG.
Reviewed by: oliver
Previously logxfer() used to record bogus pathnames to the log
in some cases, namely, when cwd was / or "name" was absolute.
Noticed by: Nick Leuta
MFC after: 2 weeks
that the creation of a PAM context has failed.
N.B. This does not apply to pam_strerror() in RELENG_4, it
will mishandle a NULL "pamh".
Discussed with: des
instead of the disk size of the file sent. Since the log file
is intended to provide data for anonymous ftp traffic accounting,
the disk size of the file isn't really informative in this case.
PR: bin/72687
Submitted by: Oleg Koreshkov
MFC after: 1 week
if sendfile() transferred some data before throwing
a error condition because sendfile() won't move the
file offset for read() to start from.
MFC after: 2 weeks
Do not unconditionally fork() after accept(). accept() can
return -1 due to an interrupted system call (i.e. SIGCHLD).
If we fork in that case ftpd can get into an
accept()/SIGCHLD/fork/[fail]/repeat loop.
Reported-by: fabian <fabian.duelli@bluewin.ch>
Obtained from: DragonflyBSD
MFC after: 1 month
