This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/*
*/
#include "includes.h"
+#include "system/passwd.h"
+#include "nsswitch/winbind_client.h"
+#include "../lib/util/setid.h"
#ifndef HAVE_GETGROUPLIST
+
+#ifdef HAVE_GETGRSET
+static int getgrouplist_getgrset(const char *user, gid_t gid, gid_t *groups,
+ int *grpcnt)
+{
+ char *grplist;
+ char *grp;
+ gid_t temp_gid;
+ int num_gids = 1;
+ int ret = 0;
+ long l;
+
+ grplist = getgrset(user);
+
+ DEBUG(10, ("getgrset returned %s\n", grplist));
+
+ if (grplist == NULL) {
+ return -1;
+ }
+
+ if (*grpcnt > 0) {
+ groups[0] = gid;
+ }
+
+ while ((grp = strsep(&grplist, ",")) != NULL) {
+ l = strtol(grp, NULL, 10);
+ temp_gid = (gid_t) l;
+ if (temp_gid == gid) {
+ continue;
+ }
+
+ if (num_gids + 1 > *grpcnt) {
+ num_gids++;
+ continue;
+ }
+ groups[num_gids++] = temp_gid;
+ }
+ free(grplist);
+
+ if (num_gids > *grpcnt) {
+ ret = -1;
+ }
+ *grpcnt = num_gids;
+
+ DEBUG(10, ("Found %d groups for user %s\n", *grpcnt, user));
+
+ return ret;
+}
+
+#else /* HAVE_GETGRSET */
+
/*
This is a *much* faster way of getting the list of groups for a user
- without changing the current supplemenrary group list. The old
+ without changing the current supplementary group list. The old
method used getgrent() which could take 20 minutes on a really big
network with hundeds of thousands of groups and users. The new method
takes a couple of seconds.
NOTE!! this function only works if it is called as root!
*/
-static int getgrouplist_internals(const char *user, gid_t gid, gid_t *groups, int *grpcnt)
+
+static int getgrouplist_internals(const char *user, gid_t gid, gid_t *groups,
+ int *grpcnt)
{
gid_t *gids_saved;
- int ret, ngrp_saved;
+ int ret, ngrp_saved, num_gids;
+
+ if (non_root_mode()) {
+ *grpcnt = 0;
+ return 0;
+ }
/* work out how many groups we need to save */
ngrp_saved = getgroups(0, NULL);
/* this shouldn't happen */
return -1;
}
-
- gids_saved = (gid_t *)malloc(sizeof(gid_t) * (ngrp_saved+1));
+
+ gids_saved = SMB_MALLOC_ARRAY(gid_t, ngrp_saved+1);
if (!gids_saved) {
errno = ENOMEM;
return -1;
ngrp_saved = getgroups(ngrp_saved, gids_saved);
if (ngrp_saved == -1) {
- free(gids_saved);
+ SAFE_FREE(gids_saved);
/* very strange! */
return -1;
}
- if (initgroups(user, gid) != 0) {
- free(gids_saved);
+ if (initgroups(user, gid) == -1) {
+ DEBUG(0, ("getgrouplist_internals: initgroups() failed!\n"));
+ SAFE_FREE(gids_saved);
return -1;
}
return from getgroups() */
save_re_gid();
set_effective_gid(gid);
- setgid(gid);
+ samba_setgid(gid);
+
+ num_gids = getgroups(0, NULL);
+ if (num_gids == -1) {
+ SAFE_FREE(gids_saved);
+ /* very strange! */
+ return -1;
+ }
- ret = getgroups(*grpcnt, groups);
- if (ret >= 0) {
- *grpcnt = ret;
+ if (num_gids + 1 > *grpcnt) {
+ *grpcnt = num_gids + 1;
+ ret = -1;
+ } else {
+ ret = getgroups(*grpcnt - 1, &groups[1]);
+ if (ret < 0) {
+ SAFE_FREE(gids_saved);
+ /* very strange! */
+ return -1;
+ }
+ groups[0] = gid;
+ *grpcnt = ret + 1;
}
restore_re_gid();
- if (setgroups(ngrp_saved, gids_saved) != 0) {
+ if (sys_setgroups(gid, ngrp_saved, gids_saved) != 0) {
/* yikes! */
DEBUG(0,("ERROR: getgrouplist: failed to reset group list!\n"));
- smb_panic("getgrouplist: failed to reset group list!\n");
- free(gids_saved);
- return -1;
+ smb_panic("getgrouplist: failed to reset group list!");
}
free(gids_saved);
return ret;
}
-#endif
+#endif /* HAVE_GETGRSET */
+#endif /* HAVE_GETGROUPLIST */
-int sys_getgrouplist(const char *user, gid_t gid, gid_t *groups, int *grpcnt)
+static int sys_getgrouplist(const char *user, gid_t gid, gid_t *groups, int *grpcnt)
{
+ int retval;
+ bool winbind_env;
+
+ DEBUG(10,("sys_getgrouplist: user [%s]\n", user));
+
+ /* This is only ever called for Unix users, remote memberships are
+ * always determined by the info3 coming back from auth3 or the
+ * PAC. */
+ winbind_env = winbind_env_set();
+ (void)winbind_off();
+
#ifdef HAVE_GETGROUPLIST
- return getgrouplist(user, gid, groups, grpcnt);
+ retval = getgrouplist(user, gid, groups, grpcnt);
+#else
+#ifdef HAVE_GETGRSET
+ retval = getgrouplist_getgrset(user, gid, groups, grpcnt);
#else
- int retval;
become_root();
retval = getgrouplist_internals(user, gid, groups, grpcnt);
unbecome_root();
-#endif
+#endif /* HAVE_GETGRSET */
+#endif /* HAVE_GETGROUPLIST */
+
+ /* allow winbindd lookups, but only if they were not already disabled */
+ if (!winbind_env) {
+ (void)winbind_on();
+ }
+
+ return retval;
+}
+
+bool getgroups_unix_user(TALLOC_CTX *mem_ctx, const char *user,
+ gid_t primary_gid,
+ gid_t **ret_groups, uint32_t *p_ngroups)
+{
+ uint32_t ngrp;
+ int max_grp;
+ gid_t *temp_groups;
+ gid_t *groups;
+ int i;
+
+ max_grp = MIN(128, groups_max());
+ temp_groups = SMB_MALLOC_ARRAY(gid_t, max_grp);
+ if (! temp_groups) {
+ return False;
+ }
+
+ if (sys_getgrouplist(user, primary_gid, temp_groups, &max_grp) == -1) {
+ temp_groups = SMB_REALLOC_ARRAY(temp_groups, gid_t, max_grp);
+ if (!temp_groups) {
+ return False;
+ }
+
+ if (sys_getgrouplist(user, primary_gid,
+ temp_groups, &max_grp) == -1) {
+ DEBUG(0, ("get_user_groups: failed to get the unix "
+ "group list\n"));
+ SAFE_FREE(temp_groups);
+ return False;
+ }
+ }
+
+ ngrp = 0;
+ groups = NULL;
+
+ /* Add in primary group first */
+ if (!add_gid_to_array_unique(mem_ctx, primary_gid, &groups, &ngrp)) {
+ SAFE_FREE(temp_groups);
+ return False;
+ }
+
+ for (i=0; i<max_grp; i++) {
+ if (!add_gid_to_array_unique(mem_ctx, temp_groups[i],
+ &groups, &ngrp)) {
+ SAFE_FREE(temp_groups);
+ return False;
+ }
+ }
+
+ *p_ngroups = ngrp;
+ *ret_groups = groups;
+ SAFE_FREE(temp_groups);
+ return True;
}
git.samba.org / kai / samba.git / blobdiff