Commit Graph

5 Commits

Author SHA1 Message Date
Zachary Loafman
7014ae09f9 Revert unnecessary memset after calloc.
Suggested by:       jhb
Approved by:        dfr (mentor)
2009-05-28 15:02:21 +00:00
Zachary Loafman
6d72217368 Fix an issue when nss fallback routines are used in a multithreaded application.
Reviewed by:        bushman
Approved by:        dfr (mentor)
2009-05-27 17:01:59 +00:00
Jacques Vidrine
a03fd3b656 When a dynamic NSS module is built and linked against a thread
library, it may pull in that thread library at run time.  If the
process started out single-threaded, this could cause attempts to
release locks that do not exist.  Guard against this possibility by
checking __isthreaded before invoking thread primitives.

A similar problem remains if the process is linked against one thread
library, but the NSS module is linked against another.  This can only
be avoided by careful design of the NSS module.

Submitted by:	Sean McNeil <sean@mcneil.com> (mostly; bugs are mine)
2004-03-30 15:56:15 +00:00
Jacques Vidrine
905ec0db3b Correct a bug that was somehow both obvious and hard-to-see. :-)
An incorrectly-sized allocation was being made due to an incorrect
argument to the `sizeof' operator.  Obvious, because it violated the
`foo = malloc(sizeof(*foo))' idiom.  Hard-to-see, because it was a
missing `*' (`*p' versus `**p').

Resulting failure was
Reported by:	ache

Sponsored by:	DARPA, Network Associates Laboratories
2003-04-21 15:44:25 +00:00
Jacques Vidrine
46d9306383 = Implement name service switch modules (NSS modules). NSS modules
may be built into libc (`static NSS modules') or dynamically loaded
  via dlopen (`dynamic NSS modules').  Modules are loaded/initialized
  at configuration time (i.e.  when nsdispatch is called and nsswitch.conf
  is read or re-read).

= Make the nsdispatch(3) core thread-safe.

= New status code for nsdispatch(3) `NS_RETURN', currently used to
  signal ERANGE-type issues.

= syslog(3) problems, don't warn/err/abort.

= Try harder to avoid namespace pollution.

= Implement some shims to assist in porting NSS modules written for
  the GNU C Library nsswitch interface.

Sponsored by:	DARPA, Network Associates Laboratories
2003-04-17 14:14:22 +00:00