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Diffstat (limited to 'nis/nss_nisplus/nisplus-initgroups.c')
-rw-r--r--nis/nss_nisplus/nisplus-initgroups.c150
1 files changed, 150 insertions, 0 deletions
diff --git a/nis/nss_nisplus/nisplus-initgroups.c b/nis/nss_nisplus/nisplus-initgroups.c
new file mode 100644
index 0000000000..6588ec2533
--- /dev/null
+++ b/nis/nss_nisplus/nisplus-initgroups.c
@@ -0,0 +1,150 @@
+/* Copyright (C) 1997, 2001, 2002, 2003, 2005, 2006
+ Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <atomic.h>
+#include <nss.h>
+#include <grp.h>
+#include <ctype.h>
+#include <errno.h>
+#include <string.h>
+#include <bits/libc-lock.h>
+#include <rpcsvc/nis.h>
+
+#include "nss-nisplus.h"
+#include "nisplus-parser.h"
+#include <libnsl.h>
+#include <nis_intern.h>
+#include <nis_xdr.h>
+
+#define NISOBJVAL(col, obj) \
+ ((obj)->EN_data.en_cols.en_cols_val[col].ec_value.ec_value_val)
+
+#define NISOBJLEN(col, obj) \
+ ((obj)->EN_data.en_cols.en_cols_val[col].ec_value.ec_value_len)
+
+extern nis_name grp_tablename_val attribute_hidden;
+extern size_t grp_tablename_len attribute_hidden;
+extern enum nss_status _nss_grp_create_tablename (int *errnop);
+
+
+enum nss_status
+_nss_nisplus_initgroups_dyn (const char *user, gid_t group, long int *start,
+ long int *size, gid_t **groupsp, long int limit,
+ int *errnop)
+{
+ if (grp_tablename_val == NULL)
+ {
+ enum nss_status status = _nss_grp_create_tablename (errnop);
+
+ if (status != NSS_STATUS_SUCCESS)
+ return status;
+ }
+
+ nis_result *result;
+ char buf[strlen (user) + 12 + grp_tablename_len];
+
+ snprintf (buf, sizeof (buf), "[members=%s],%s", user, grp_tablename_val);
+
+ result = nis_list (buf, FOLLOW_LINKS | FOLLOW_PATH | ALL_RESULTS, NULL, NULL);
+
+ if (result == NULL)
+ {
+ *errnop = ENOMEM;
+ return NSS_STATUS_TRYAGAIN;
+ }
+
+ if (__builtin_expect (niserr2nss (result->status) != NSS_STATUS_SUCCESS, 0))
+ {
+ enum nss_status status = niserr2nss (result->status);
+
+ nis_freeresult (result);
+ return status;
+ }
+
+ if (NIS_RES_NUMOBJ (result) == 0)
+ {
+ errout:
+ nis_freeresult (result);
+ return NSS_STATUS_NOTFOUND;
+ }
+
+ gid_t *groups = *groupsp;
+ nis_object *obj = NIS_RES_OBJECT (result);
+ for (unsigned int cnt = 0; cnt < NIS_RES_NUMOBJ (result); ++cnt, ++obj)
+ {
+ if (__type_of (obj) != NIS_ENTRY_OBJ
+ || strcmp (obj->EN_data.en_type, "group_tbl") != 0
+ || obj->EN_data.en_cols.en_cols_len < 4)
+ continue;
+
+ char *numstr = NISOBJVAL (2, obj);
+ size_t len = NISOBJLEN (2, obj);
+ if (len == 0 || numstr[0] == '\0')
+ continue;
+
+ gid_t gid;
+ char *endp;
+ if (__builtin_expect (numstr[len - 1] != '\0', 0))
+ {
+ char numstrbuf[len + 1];
+ memcpy (numstrbuf, numstr, len);
+ numstrbuf[len] = '\0';
+ gid = strtoul (numstrbuf, &endp, 10);
+ if (*endp)
+ continue;
+ }
+ else
+ {
+ gid = strtoul (numstr, &endp, 10);
+ if (*endp)
+ continue;
+ }
+
+ if (gid == group)
+ continue;
+
+ /* Insert this group. */
+ if (*start == *size)
+ {
+ /* Need a bigger buffer. */
+ long int newsize;
+
+ if (limit > 0 && *size == limit)
+ /* We reached the maximum. */
+ break;
+
+ if (limit <= 0)
+ newsize = 2 * *size;
+ else
+ newsize = MIN (limit, 2 * *size);
+
+ gid_t *newgroups = realloc (groups, newsize * sizeof (*groups));
+ if (newgroups == NULL)
+ goto errout;
+ *groupsp = groups = newgroups;
+ *size = newsize;
+ }
+
+ groups[*start] = gid;
+ *start += 1;
+ }
+
+ nis_freeresult (result);
+ return NSS_STATUS_SUCCESS;
+}