Groupname mapping code now lives here.

Jeremy.

1 files changed, 204 insertions, 0 deletions

diff --git a/source/smbd/groupname.c b/source/smbd/groupname.c
new file mode 100644
index 00000000000..4cfd3e98f52
--- /dev/null
+++ b/source/smbd/groupname.c
@@ -0,0 +1,204 @@
+/* 
+   Unix SMB/Netbios implementation.
+   Version 1.9.
+   Groupname handling
+   Copyright (C) Jeremy Allison 1998.
+   
+   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
+   (at your option) any later version.
+   
+   This program 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 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.
+*/
+
+#include "includes.h"
+extern int DEBUGLEVEL;
+extern DOM_SID global_machine_sid;
+
+
+/**************************************************************************
+ Groupname map functionality. The code loads a groupname map file and
+ (currently) loads it into a linked list. This is slow and memory
+ hungry, but can be changed into a more efficient storage format
+ if the demands on it become excessive.
+***************************************************************************/
+
+typedef struct groupname_map {
+   ubi_slNode next;
+
+   char *windows_name;
+   DOM_SID windows_sid;
+   char *unix_name;
+   gid_t unix_gid;
+} groupname_map_entry;
+
+static ubi_slList groupname_map_list;
+
+/**************************************************************************
+ Delete all the entries in the groupname map list.
+***************************************************************************/
+
+static void delete_groupname_map_list(void)
+{
+  groupname_map_entry *gmep;
+
+  while((gmep = (groupname_map_entry *)ubi_slRemHead( &groupname_map_list )) != NULL) {
+    if(gmep->windows_name)
+      free(gmep->windows_name);
+    if(gmep->unix_name)
+      free(gmep->unix_name);
+    free((char *)gmep);
+  }
+}
+
+/**************************************************************************
+ Load a groupname map file. Sets last accessed timestamp.
+***************************************************************************/
+
+void load_groupname_map(void)
+{
+  static time_t groupmap_file_last_modified = (time_t)0;
+  static BOOL initialized = False;
+  char *groupname_map_file = lp_groupname_map();
+  struct stat st;
+  FILE *fp;
+  char *s;
+  pstring buf;
+  groupname_map_entry *new_ep;
+
+  if(!initialized) {
+    ubi_slInitList( &groupname_map_list );
+    initialized = True;
+  }
+
+  if (!*groupname_map_file)
+    return;
+
+  if(stat(groupname_map_file, &st) != 0) {
+    DEBUG(0, ("load_groupname_map: Unable to stat file %s. Error was %s\n",
+               groupname_map_file, strerror(errno) ));
+    return;
+  }
+
+  /*
+   * Check if file has changed.
+   */
+  if( st.st_mtime <= groupmap_file_last_modified)
+    return;
+
+  groupmap_file_last_modified = st.st_mtime;
+
+  /*
+   * Load the file.
+   */
+
+  fp = fopen(groupname_map_file,"r");
+  if (!fp) {
+    DEBUG(0,("load_groupname_map: can't open groupname map %s. Error was %s\n",
+          groupname_map_file, strerror(errno)));
+    return;
+  }
+
+  /*
+   * Throw away any previous list.
+   */
+  delete_groupname_map_list();
+
+  DEBUG(4,("load_groupname_map: Scanning groupname map %s\n",groupname_map_file));
+
+  while((s=fgets_slash(buf,sizeof(buf),fp))!=NULL) {
+    pstring unixname;
+    pstring windows_name;
+    struct group *gptr;
+    DOM_SID tmp_sid;
+
+    DEBUG(10,("load_groupname_map: Read line |%s|\n", s));
+
+    if (!*s || strchr("#;",*s))
+      continue;
+
+    if(!next_token(&s,unixname, "\t\n\r="))
+      continue;
+
+    if(!next_token(&s,windows_name, "\t\n\r="))
+      continue;
+
+    trim_string(unixname, " ", " ");
+    trim_string(windows_name, " ", " ");
+
+    if (!*windows_name)
+      continue;
+
+    if(!*unixname)
+      continue;
+
+    DEBUG(5,("load_groupname_map: unixname = %s, windowsname = %s.\n",
+             unixname, windows_name));
+
+    /*
+     * Attempt to get the unix gid_t for this name.
+     */
+
+    if((gptr = (struct group *)getgrnam(unixname)) == NULL) {
+      DEBUG(0,("load_groupname_map: getgrnam for group %s failed.\
+Error was %s.\n", unixname, strerror(errno) ));
+      continue;
+    }
+
+    /*
+     * Now map to an NT SID.
+     */
+
+    if(!lookup_wellknown_sid_from_name(windows_name, &tmp_sid)) {
+      /*
+       * It's not a well known name, convert the UNIX gid_t
+       * to a rid within this domain SID.
+       */
+      tmp_sid = global_machine_sid;
+      tmp_sid.sub_auths[tmp_sid.num_auths++] = 
+                    pdb_gid_to_group_rid((gid_t)gptr->gr_gid);
+    }
+
+    /*
+     * Create the list entry and add it onto the list.
+     */
+
+    if((new_ep = (groupname_map_entry *)malloc( sizeof(groupname_map_entry) ))== NULL) {
+      DEBUG(0,("load_groupname_map: malloc fail for groupname_map_entry.\n"));
+      fclose(fp);
+      return;
+    } 
+
+    new_ep->unix_gid = gptr->gr_gid;
+    new_ep->windows_sid = tmp_sid;
+    new_ep->windows_name = strdup( windows_name );
+    new_ep->unix_name = strdup( unixname );
+
+    if(new_ep->windows_name == NULL || new_ep->unix_name == NULL) {
+      DEBUG(0,("load_groupname_map: malloc fail for names in groupname_map_entry.\n"));
+      fclose(fp);
+      if(new_ep->windows_name != NULL)
+        free(new_ep->windows_name);
+      if(new_ep->unix_name != NULL)
+        free(new_ep->unix_name);
+      free((char *)new_ep);
+      return;
+    }
+    memset((char *)&new_ep->next, '\0', sizeof(new_ep->next) );
+
+    ubi_slAddHead( &groupname_map_list, (ubi_slNode *)new_ep);
+  }
+
+  DEBUG(10,("load_groupname_map: Added %d entries to groupname map.\n",
+        ubi_slCount( &groupname_map_list ) ));
+           
+  fclose(fp);
+}