Added the group enum code from 2.2

Jeremy.
(This used to be commit 59e01a22c5cb1046758c8cd6b09333c19d6cd26e)

5 files changed, 118 insertions, 23 deletions

diff --git a/source3/Makefile.in b/source3/Makefile.in
index a2f92180cc..d345cdf8a6 100644
--- a/source3/Makefile.in
+++ b/source3/Makefile.in
@@ -114,7 +114,7 @@ LIB_OBJ = lib/charcnv.o lib/debug.o lib/fault.o \
           lib/getsmbpass.o lib/interface.o lib/md4.o \
           lib/interfaces.o lib/pidfile.o lib/replace.o \
           lib/signal.o lib/system.o lib/time.o \
-	  lib/ufc.o lib/genrand.o lib/username.o lib/access.o lib/smbrun.o \
+	  lib/ufc.o lib/genrand.o lib/username.o lib/util_getent.o lib/access.o lib/smbrun.o \
 	  lib/bitmap.o lib/crc32.o lib/snprintf.o lib/dprintf.o lib/xfile.o lib/wins_srv.o \
 	  lib/util_str.o lib/util_sid.o \
 	  lib/util_unistr.o lib/util_file.o lib/sysacls.o \
@@ -160,8 +160,7 @@ RPC_SERVER_OBJ = rpc_server/srv_lsa.o rpc_server/srv_lsa_nt.o \
                  rpc_server/srv_samr.o rpc_server/srv_samr_nt.o rpc_server/srv_srvsvc.o rpc_server/srv_srvsvc_nt.o \
                  rpc_server/srv_util.o rpc_server/srv_wkssvc.o rpc_server/srv_wkssvc_nt.o \
                  rpc_server/srv_pipe.o rpc_server/srv_dfs.o rpc_server/srv_dfs_nt.o \
-                 rpc_server/srv_spoolss.o rpc_server/srv_spoolss_nt.o \
-		 lib/util_getent.o
+                 rpc_server/srv_spoolss.o rpc_server/srv_spoolss_nt.o
 
 # this includes only the low level parse code, not stuff
 # that requires knowledge of security contexts
@@ -403,7 +402,7 @@ PAM_SMBPASS_OBJ_0 = pam_smbpass/pam_smb_auth.o pam_smbpass/pam_smb_passwd.o \
                lib/wins_srv.o lib/substitute.o lib/select.o lib/util.o \
                nsswitch/wb_client.o nsswitch/wb_common.o \
                lib/system.o lib/util_file.o \
-               lib/genrand.o lib/username.o lib/charcnv.o lib/time.o \
+               lib/genrand.o lib/username.o lib/util_getent.o lib/charcnv.o lib/time.o \
                lib/md4.o lib/util_unistr.o lib/signal.o lib/talloc.o \
                lib/ms_fnmatch.o lib/util_sock.o lib/smbrun.o \
                lib/util_sec.o \
diff --git a/source3/include/util_getent.h b/source3/include/util_getent.h
index 877d272ceb..5d4674ddef 100644
--- a/source3/include/util_getent.h
+++ b/source3/include/util_getent.h
@@ -22,9 +22,10 @@
 #ifndef _UTIL_GETENT_H
 #define _UTIL_GETENT_H
 
-/* element for a single linked list of group entries */
-/* replace the use of struct group in some cases */
-/* used by getgrent_list() */
+/* Element for a single linked list of group entries */
+/* Replace the use of struct group in some cases */
+/* Used by getgrent_list() */
+
 struct sys_grent {
 	char *gr_name;
 	char *gr_passwd;
@@ -33,9 +34,10 @@ struct sys_grent {
 	struct sys_grent *next;
 };
 
-/* element for a single linked list of passwd entries */
-/* replace the use of struct passwd in some cases */
-/* used by getpwent_list() */
+/* Element for a single linked list of passwd entries */
+/* Replace the use of struct passwd in some cases */
+/* Used by getpwent_list() */
+
 struct sys_pwent {
 	char *pw_name;
 	char *pw_passwd;
@@ -47,4 +49,14 @@ struct sys_pwent {
 	struct sys_pwent *next;
 };
 
+/* Element for a single linked list of user names in a group. */
+/* Used to return group lists that may span multiple lines in 
+   /etc/group file. */
+/* Used by get_users_in_group() */
+
+struct sys_userlist {
+	struct sys_userlist *next, *prev;
+	char *unix_name;
+};
+
 #endif /* _UTIL_GETENT_H */
diff --git a/source3/lib/username.c b/source3/lib/username.c
index 3562ab3b95..e65f133812 100644
--- a/source3/lib/username.c
+++ b/source3/lib/username.c
@@ -344,10 +344,10 @@ failed with error %s\n", strerror(errno) ));
  		goto err;
 	}
  
- 	/*
- 	 * Now we have the gid list for this user - convert the gname
- 	 * to a gid_t via either winbind or the local UNIX lookup and do the comparison.
- 	 */
+	/*
+	 * Now we have the gid list for this user - convert the gname
+	 * to a gid_t via either winbind or the local UNIX lookup and do the comparison.
+	 */
  
 	if ((gid = nametogid(gname)) == (gid_t)-1) {
  		DEBUG(0,("user_in_winbind_group_list: winbind_lookup_name for group %s failed.\n",
@@ -379,9 +379,9 @@ failed with error %s\n", strerror(errno) ));
 
 static BOOL user_in_unix_group_list(const char *user,const char *gname)
 {
-	struct group *gptr;
-	char **member;  
 	struct passwd *pass = Get_Pwnam(user);
+	struct sys_userlist *user_list;
+	struct sys_userlist *member;
 
 	DEBUG(10,("user_in_unix_group_list: checking user %s in group %s\n", user, gname));
 
@@ -397,20 +397,22 @@ static BOOL user_in_unix_group_list(const char *user,const char *gname)
  		}
  	}
  
- 	if ((gptr = (struct group *)getgrnam(gname)) == NULL) {
+	user_list = get_users_in_group(gname);
+ 	if (user_list == NULL) {
  		DEBUG(10,("user_in_unix_group_list: no such group %s\n", gname ));
  		return False;
  	}
- 
- 	member = gptr->gr_mem;
-  	while (member && *member) {
- 		DEBUG(10,("user_in_unix_group_list: checking user %s against member %s\n", user, *member ));
-  		if (strequal(*member,user)) {
+
+	for (member = user_list; member; member = member->next) {
+ 		DEBUG(10,("user_in_unix_group_list: checking user %s against member %s\n",
+			user, member->unix_name ));
+  		if (strequal(member->unix_name,user)) {
+			free_userlist(user_list);
   			return(True);
   		}
-		member++;
 	}
 
+	free_userlist(user_list);
 	return False;
 }	      
 
diff --git a/source3/lib/util_getent.c b/source3/lib/util_getent.c
index 4393debaba..81b36effcb 100644
--- a/source3/lib/util_getent.c
+++ b/source3/lib/util_getent.c
@@ -3,6 +3,7 @@
    Version 3.0
    Samba utility functions
    Copyright (C) Simo Sorce 2001
+   Copyright (C) Jeremy Allison 2001
 
    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
@@ -230,3 +231,83 @@ void pwent_free (struct sys_pwent *plist)
 		SAFE_FREE(prev);
 	}
 }
+
+/****************************************************************
+ Add the individual group users onto the list.
+****************************************************************/
+
+static struct sys_userlist *add_members_to_userlist(struct sys_userlist *list_head, const struct group *grp)
+{
+	size_t num_users, i;
+
+	/* Count the number of users. */
+	for (num_users = 0; grp->gr_mem[num_users]; num_users++)
+		;
+
+	for (i = 0; i < num_users; i++) {
+		struct sys_userlist *entry = (struct sys_userlist *)malloc(sizeof(*entry));
+		size_t len = strlen(grp->gr_mem[i])+1;
+		if (entry == NULL) {
+			free_userlist(list_head);
+			return NULL;
+		}
+		entry->unix_name = (char *)malloc(len);
+		if (entry->unix_name == NULL) {
+			SAFE_FREE(entry);
+			free_userlist(list_head);
+			return NULL;
+		}
+		safe_strcpy(entry->unix_name, grp->gr_mem[i],len);
+		DLIST_ADD(list_head, entry);
+	}
+	return list_head;
+}
+
+/****************************************************************
+ Get the list of UNIX users in a group.
+ We have to enumerate the /etc/group file as some UNIX getgrnam()
+ calls won't do that for us (notably Tru64 UNIX).
+****************************************************************/
+
+struct sys_userlist *get_users_in_group(const char *gname)
+{
+	struct sys_userlist *list_head = NULL;
+	struct group *gptr;
+
+	/*
+	 * If we're doing this via winbindd, don't do the
+	 * entire group list enumeration as we know this is
+	 * pointless (and slow).
+	 */
+
+	if (strchr(gname,*lp_winbind_separator())) {
+		if ((gptr = (struct group *)getgrnam(gname)) == NULL)
+			return NULL;
+		return add_members_to_userlist(list_head, gptr);
+	}
+
+	setgrent();
+	while((gptr = getgrent()) != NULL) {
+		if (strequal(gname, gptr->gr_name)) {
+			list_head = add_members_to_userlist(list_head, gptr);
+			if (list_head == NULL)
+				return NULL;
+		}
+	}
+	endgrent();
+	return list_head;
+}
+
+/****************************************************************
+ Free list allocated above.
+****************************************************************/
+
+void free_userlist(struct sys_userlist *list_head)
+{
+	while (list_head) {
+		struct sys_userlist *old_head = list_head;
+		DLIST_REMOVE(list_head, list_head);
+		SAFE_FREE(old_head->unix_name);
+		SAFE_FREE(old_head);
+	}
+}
diff --git a/source3/nsswitch/winbindd_proto.h b/source3/nsswitch/winbindd_proto.h
index 9de38a3543..d50469d978 100644
--- a/source3/nsswitch/winbindd_proto.h
+++ b/source3/nsswitch/winbindd_proto.h
@@ -26,6 +26,7 @@ struct cache_entry *centry_start(struct winbindd_domain *domain, NTSTATUS status
 
 /* The following definitions come from nsswitch/winbindd_cm.c  */
 
+void cm_init_creds(struct ntuser_creds *creds);
 CLI_POLICY_HND *cm_get_lsa_handle(char *domain);
 CLI_POLICY_HND *cm_get_sam_handle(char *domain);
 CLI_POLICY_HND *cm_get_sam_dom_handle(char *domain, DOM_SID *domain_sid);