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-rw-r--r--nis/nss_nis/nis-grp.c179
1 files changed, 143 insertions, 36 deletions
diff --git a/nis/nss_nis/nis-grp.c b/nis/nss_nis/nis-grp.c
index 68f3ced992..ce642c484f 100644
--- a/nis/nss_nis/nis-grp.c
+++ b/nis/nss_nis/nis-grp.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1996-1999, 2001-2003, 2004, 2006 Free Software Foundation, Inc.
+/* Copyright (C) 1996-1999, 2001-2004, 2006 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Thorsten Kukuk <kukuk@suse.de>, 1996.
@@ -17,20 +17,17 @@
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
-#include <nss.h>
-/* The following is an ugly trick to avoid a prototype declaration for
- _nss_nis_endgrent. */
-#define _nss_nis_endgrent _nss_nis_endgrent_XXX
-#include <grp.h>
-#undef _nss_nis_endgrent
#include <ctype.h>
#include <errno.h>
+#include <grp.h>
+#include <nss.h>
#include <string.h>
#include <bits/libc-lock.h>
#include <rpcsvc/yp.h>
#include <rpcsvc/ypclnt.h>
#include "nss-nis.h"
+#include <libnsl.h>
/* Get the declaration of the parser function. */
#define ENTNAME grent
@@ -44,12 +41,12 @@ __libc_lock_define_initialized (static, lock)
static bool_t new_start = 1;
static char *oldkey;
static int oldkeylen;
+static intern_t intern;
-enum nss_status
-_nss_nis_setgrent (int stayopen)
-{
- __libc_lock_lock (lock);
+static void
+internal_nis_endgrent (void)
+{
new_start = 1;
if (oldkey != NULL)
{
@@ -58,21 +55,86 @@ _nss_nis_setgrent (int stayopen)
oldkeylen = 0;
}
+ struct response_t *curr = intern.next;
+
+ while (curr != NULL)
+ {
+ struct response_t *last = curr;
+ curr = curr->next;
+ free (last);
+ }
+
+ intern.next = intern.start = NULL;
+}
+
+
+enum nss_status
+_nss_nis_endgrent (void)
+{
+ __libc_lock_lock (lock);
+
+ internal_nis_endgrent ();
+
__libc_lock_unlock (lock);
return NSS_STATUS_SUCCESS;
}
-/* Make _nss_nis_endgrent an alias of _nss_nis_setgrent. We do this
- even though the prototypes don't match. The argument of setgrent
- is not used so this makes no difference. */
-strong_alias (_nss_nis_setgrent, _nss_nis_endgrent)
+
+
+enum nss_status
+internal_nis_setgrent (void)
+{
+ /* We have to read all the data now. */
+ char *domain;
+ if (__builtin_expect (yp_get_default_domain (&domain), 0))
+ return NSS_STATUS_UNAVAIL;
+
+ struct ypall_callback ypcb;
+
+ ypcb.foreach = _nis_saveit;
+ ypcb.data = (char *) &intern;
+ enum nss_status status = yperr2nss (yp_all (domain, "group.byname", &ypcb));
+
+
+ /* Mark the last buffer as full. */
+ if (intern.next != NULL)
+ intern.next->size = intern.offset;
+
+ intern.next = intern.start;
+ intern.offset = 0;
+
+ return status;
+}
+
+
+enum nss_status
+_nss_nis_setgrent (int stayopen)
+{
+ enum nss_status result = NSS_STATUS_SUCCESS;
+
+ __libc_lock_lock (lock);
+
+ internal_nis_endgrent ();
+
+ if (_nsl_default_nss () & NSS_FLAG_SETENT_BATCH_READ)
+ result = internal_nis_setgrent ();
+
+ __libc_lock_unlock (lock);
+
+ return result;
+}
+
static enum nss_status
internal_nis_getgrent_r (struct group *grp, char *buffer, size_t buflen,
int *errnop)
{
- char *domain;
- if (__builtin_expect (yp_get_default_domain (&domain), 0))
+ /* If we read the entire database at setpwent time we just iterate
+ over the data we have in memory. */
+ bool batch_read = intern.start != NULL;
+
+ char *domain = NULL;
+ if (!batch_read && __builtin_expect (yp_get_default_domain (&domain), 0))
return NSS_STATUS_UNAVAIL;
/* Get the next entry until we found a correct one. */
@@ -83,23 +145,62 @@ internal_nis_getgrent_r (struct group *grp, char *buffer, size_t buflen,
char *outkey;
int len;
int keylen;
- int yperr;
- if (new_start)
- yperr = yp_first (domain, "group.byname", &outkey, &keylen, &result,
- &len);
- else
- yperr = yp_next (domain, "group.byname", oldkey, oldkeylen, &outkey,
- &keylen, &result, &len);
+ if (batch_read)
+ {
+ struct response_t *bucket;
- if (__builtin_expect (yperr != YPERR_SUCCESS, 0))
- {
- enum nss_status retval = yperr2nss (yperr);
+ handle_batch_read:
+ bucket = intern.next;
- if (retval == NSS_STATUS_TRYAGAIN)
- *errnop = errno;
- return retval;
- }
+ if (__builtin_expect (intern.offset >= bucket->size, 0))
+ {
+ if (bucket->next == NULL)
+ return NSS_STATUS_NOTFOUND;
+
+ /* We look at all the content in the current bucket. Go on
+ to the next. */
+ bucket = intern.next = bucket->next;
+ intern.offset = 0;
+ }
+
+ for (result = &bucket->mem[intern.offset]; isspace (*result);
+ ++result)
+ ++intern.offset;
+
+ len = strlen (result);
+ }
+ else
+ {
+ int yperr;
+
+ if (new_start)
+ {
+ /* Maybe we should read the database in one piece. */
+ if ((_nsl_default_nss () & NSS_FLAG_SETENT_BATCH_READ)
+ && internal_nis_setgrent () == NSS_STATUS_SUCCESS
+ && intern.start != NULL)
+ {
+ batch_read = true;
+ goto handle_batch_read;
+ }
+
+ yperr = yp_first (domain, "group.byname", &outkey, &keylen,
+ &result, &len);
+ }
+ else
+ yperr = yp_next (domain, "group.byname", oldkey, oldkeylen,
+ &outkey, &keylen, &result, &len);
+
+ if (__builtin_expect (yperr != YPERR_SUCCESS, 0))
+ {
+ enum nss_status retval = yperr2nss (yperr);
+
+ if (retval == NSS_STATUS_TRYAGAIN)
+ *errnop = errno;
+ return retval;
+ }
+ }
if (__builtin_expect ((size_t) (len + 1) > buflen, 0))
{
@@ -112,7 +213,8 @@ internal_nis_getgrent_r (struct group *grp, char *buffer, size_t buflen,
buffer[len] = '\0';
while (isspace (*p))
++p;
- free (result);
+ if (!batch_read)
+ free (result);
parse_res = _nss_files_parse_grent (p, grp, (void *) buffer, buflen,
errnop);
@@ -123,10 +225,15 @@ internal_nis_getgrent_r (struct group *grp, char *buffer, size_t buflen,
return NSS_STATUS_TRYAGAIN;
}
- free (oldkey);
- oldkey = outkey;
- oldkeylen = keylen;
- new_start = 0;
+ if (batch_read)
+ intern.offset += len + 1;
+ else
+ {
+ free (oldkey);
+ oldkey = outkey;
+ oldkeylen = keylen;
+ new_start = 0;
+ }
}
while (parse_res < 1);