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nsdispatch.c (127012) nsdispatch.c (127625)
1/* $NetBSD: nsdispatch.c,v 1.9 1999/01/25 00:16:17 lukem Exp $ */
2
3/*-
4 * Copyright (c) 1997, 1998, 1999 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Luke Mewburn.

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63 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
64 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
65 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
66 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
67 * SUCH DAMAGE.
68 *
69 */
70#include <sys/cdefs.h>
1/* $NetBSD: nsdispatch.c,v 1.9 1999/01/25 00:16:17 lukem Exp $ */
2
3/*-
4 * Copyright (c) 1997, 1998, 1999 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Luke Mewburn.

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63 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
64 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
65 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
66 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
67 * SUCH DAMAGE.
68 *
69 */
70#include <sys/cdefs.h>
71__FBSDID("$FreeBSD: head/lib/libc/net/nsdispatch.c 127012 2004-03-15 08:14:35Z des $");
71__FBSDID("$FreeBSD: head/lib/libc/net/nsdispatch.c 127625 2004-03-30 15:56:15Z nectar $");
72
73#include "namespace.h"
74#include <sys/param.h>
75#include <sys/stat.h>
76
77#include <dlfcn.h>
78#include <errno.h>
79#include <fcntl.h>

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311 * prepare global data needed by NSS.
312 */
313static int
314nss_configure(void)
315{
316 static pthread_mutex_t conf_lock = PTHREAD_MUTEX_INITIALIZER;
317 static time_t confmod;
318 struct stat statbuf;
72
73#include "namespace.h"
74#include <sys/param.h>
75#include <sys/stat.h>
76
77#include <dlfcn.h>
78#include <errno.h>
79#include <fcntl.h>

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311 * prepare global data needed by NSS.
312 */
313static int
314nss_configure(void)
315{
316 static pthread_mutex_t conf_lock = PTHREAD_MUTEX_INITIALIZER;
317 static time_t confmod;
318 struct stat statbuf;
319 int result;
319 int result, isthreaded;
320 const char *path;
321
320 const char *path;
321
322 result = 0;
323 isthreaded = __isthreaded;
322#if defined(_NSS_DEBUG) && defined(_NSS_SHOOT_FOOT)
323 /* NOTE WELL: THIS IS A SECURITY HOLE. This must only be built
324 * for debugging purposes and MUST NEVER be used in production.
325 */
326 path = getenv("NSSWITCH_CONF");
327 if (path == NULL)
328#endif
329 path = _PATH_NS_CONF;
330 if (stat(path, &statbuf) != 0)
331 return (0);
332 if (statbuf.st_mtime <= confmod)
333 return (0);
324#if defined(_NSS_DEBUG) && defined(_NSS_SHOOT_FOOT)
325 /* NOTE WELL: THIS IS A SECURITY HOLE. This must only be built
326 * for debugging purposes and MUST NEVER be used in production.
327 */
328 path = getenv("NSSWITCH_CONF");
329 if (path == NULL)
330#endif
331 path = _PATH_NS_CONF;
332 if (stat(path, &statbuf) != 0)
333 return (0);
334 if (statbuf.st_mtime <= confmod)
335 return (0);
334 result = _pthread_mutex_trylock(&conf_lock);
335 if (result != 0)
336 return (0);
337 (void)_pthread_rwlock_unlock(&nss_lock);
338 result = _pthread_rwlock_wrlock(&nss_lock);
339 if (result != 0)
340 goto fin2;
336 if (isthreaded) {
337 result = _pthread_mutex_trylock(&conf_lock);
338 if (result != 0)
339 return (0);
340 (void)_pthread_rwlock_unlock(&nss_lock);
341 result = _pthread_rwlock_wrlock(&nss_lock);
342 if (result != 0)
343 goto fin2;
344 }
341 _nsyyin = fopen(path, "r");
345 _nsyyin = fopen(path, "r");
342 if (_nsyyin == NULL)
346 if (_nsyyin == NULL) {
347 result = errno;
343 goto fin;
348 goto fin;
349 }
344 VECTOR_FREE(_nsmap, &_nsmapsize, sizeof(*_nsmap),
345 (vector_free_elem)ns_dbt_free);
346 VECTOR_FREE(_nsmod, &_nsmodsize, sizeof(*_nsmod),
347 (vector_free_elem)ns_mod_free);
348 nss_load_builtin_modules();
349 _nsyyparse();
350 (void)fclose(_nsyyin);
351 vector_sort(_nsmap, _nsmapsize, sizeof(*_nsmap), string_compare);
352 if (confmod == 0)
353 (void)atexit(nss_atexit);
354 confmod = statbuf.st_mtime;
355fin:
350 VECTOR_FREE(_nsmap, &_nsmapsize, sizeof(*_nsmap),
351 (vector_free_elem)ns_dbt_free);
352 VECTOR_FREE(_nsmod, &_nsmodsize, sizeof(*_nsmod),
353 (vector_free_elem)ns_mod_free);
354 nss_load_builtin_modules();
355 _nsyyparse();
356 (void)fclose(_nsyyin);
357 vector_sort(_nsmap, _nsmapsize, sizeof(*_nsmap), string_compare);
358 if (confmod == 0)
359 (void)atexit(nss_atexit);
360 confmod = statbuf.st_mtime;
361fin:
356 (void)_pthread_rwlock_unlock(&nss_lock);
357 result = _pthread_rwlock_rdlock(&nss_lock);
362 if (isthreaded) {
363 (void)_pthread_rwlock_unlock(&nss_lock);
364 if (result == 0)
365 result = _pthread_rwlock_rdlock(&nss_lock);
366 }
358fin2:
367fin2:
359 (void)_pthread_mutex_unlock(&conf_lock);
368 if (isthreaded)
369 (void)_pthread_mutex_unlock(&conf_lock);
360 return (result);
361}
362
363
364void
365_nsdbtput(const ns_dbt *dbt)
366{
367 unsigned int i;

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505
506
507/*
508 * Cleanup
509 */
510static void
511nss_atexit(void)
512{
370 return (result);
371}
372
373
374void
375_nsdbtput(const ns_dbt *dbt)
376{
377 unsigned int i;

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515
516
517/*
518 * Cleanup
519 */
520static void
521nss_atexit(void)
522{
513 (void)_pthread_rwlock_wrlock(&nss_lock);
523 int isthreaded;
524
525 isthreaded = __isthreaded;
526 if (isthreaded)
527 (void)_pthread_rwlock_wrlock(&nss_lock);
514 VECTOR_FREE(_nsmap, &_nsmapsize, sizeof(*_nsmap),
515 (vector_free_elem)ns_dbt_free);
516 VECTOR_FREE(_nsmod, &_nsmodsize, sizeof(*_nsmod),
517 (vector_free_elem)ns_mod_free);
528 VECTOR_FREE(_nsmap, &_nsmapsize, sizeof(*_nsmap),
529 (vector_free_elem)ns_dbt_free);
530 VECTOR_FREE(_nsmod, &_nsmodsize, sizeof(*_nsmod),
531 (vector_free_elem)ns_mod_free);
518 (void)_pthread_rwlock_unlock(&nss_lock);
532 if (isthreaded)
533 (void)_pthread_rwlock_unlock(&nss_lock);
519}
520
521
522
523/*
524 * Finally, the actual implementation.
525 */
526static nss_method

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563_nsdispatch(void *retval, const ns_dtab disp_tab[], const char *database,
564 const char *method_name, const ns_src defaults[], ...)
565{
566 va_list ap;
567 const ns_dbt *dbt;
568 const ns_src *srclist;
569 nss_method method;
570 void *mdata;
534}
535
536
537
538/*
539 * Finally, the actual implementation.
540 */
541static nss_method

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578_nsdispatch(void *retval, const ns_dtab disp_tab[], const char *database,
579 const char *method_name, const ns_src defaults[], ...)
580{
581 va_list ap;
582 const ns_dbt *dbt;
583 const ns_src *srclist;
584 nss_method method;
585 void *mdata;
571 int serrno, i, result, srclistsize;
586 int isthreaded, serrno, i, result, srclistsize;
572
587
588 isthreaded = __isthreaded;
573 serrno = errno;
589 serrno = errno;
574 result = _pthread_rwlock_rdlock(&nss_lock);
575 if (result != 0) {
576 result = NS_UNAVAIL;
577 goto fin;
590 if (isthreaded) {
591 result = _pthread_rwlock_rdlock(&nss_lock);
592 if (result != 0) {
593 result = NS_UNAVAIL;
594 goto fin;
595 }
578 }
579 result = nss_configure();
580 if (result != 0) {
581 result = NS_UNAVAIL;
582 goto fin;
583 }
584 dbt = vector_search(&database, _nsmap, _nsmapsize, sizeof(*_nsmap),
585 string_compare);

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599 if (method != NULL) {
600 va_start(ap, defaults);
601 result = method(retval, mdata, ap);
602 va_end(ap);
603 if (result & (srclist[i].flags))
604 break;
605 }
606 }
596 }
597 result = nss_configure();
598 if (result != 0) {
599 result = NS_UNAVAIL;
600 goto fin;
601 }
602 dbt = vector_search(&database, _nsmap, _nsmapsize, sizeof(*_nsmap),
603 string_compare);

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617 if (method != NULL) {
618 va_start(ap, defaults);
619 result = method(retval, mdata, ap);
620 va_end(ap);
621 if (result & (srclist[i].flags))
622 break;
623 }
624 }
607 (void)_pthread_rwlock_unlock(&nss_lock);
625 if (isthreaded)
626 (void)_pthread_rwlock_unlock(&nss_lock);
608fin:
609 errno = serrno;
610 return (result);
611}
627fin:
628 errno = serrno;
629 return (result);
630}