re #11201 nss: need local netgroup implementation

*** 17,26 ****
--- 17,27 ----
   * information: Portions Copyright [yyyy] [name of copyright owner]
   *
   * CDDL HEADER END
   */
  /*
+  * Copyright 2012 Nexenta Systems, Inc.  All rights reserved.
   * Copyright 2014 Garrett D'Amore <garrett@damore.org>
   *
   * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   *
*** 146,155 ****
--- 147,157 ----
  #define NSS_BUFSIZ              1024
  
  #define NSS_LINELEN_GROUP       ((NSS_BUFSIZ) * 8)
  #define NSS_LINELEN_HOSTS       ((NSS_BUFSIZ) * 8)
  #define NSS_LINELEN_IPNODES     ((NSS_BUFSIZ) * 8)
+ #define NSS_LINELEN_NETGROUP    ((NSS_BUFSIZ) * 32)
  #define NSS_LINELEN_NETMASKS    NSS_BUFSIZ
  #define NSS_LINELEN_NETWORKS    NSS_BUFSIZ
  #define NSS_LINELEN_PASSWD      NSS_BUFSIZ
  #define NSS_LINELEN_PRINTERS    NSS_BUFSIZ
  #define NSS_LINELEN_PROJECT     ((NSS_BUFSIZ) * 4)
*** 356,365 ****
--- 358,373 ----
          struct nss_innetgr_1arg groups;
  /* out: */
          enum nss_netgr_status   status;
  };
  
+ /* For NSS_DBOP_NETGROUP_BYNAME */
+ struct nss_netgrent {
+         char    *netgr_name;
+         char    *netgr_members;
+ };
+ 
  /*
   * nss_XbyY_buf_t -- structure containing the generic arguments passwd to
   *   getXXXbyYYY_r() and getXXXent_r() routines.  The (void *) value points to
   *   a struct of the appropriate type, e.g. struct passwd or struct hostent.
   *
*** 777,789 ****
--- 785,799 ----
  
  #define NSS_DBOP_PRINTERS_BYNAME        (NSS_DBOP_next_iter)
  
  /*
   * The "real" backend for netgroup (__multi_innetgr, setnetgrent)
+  * Note: _BYNAME is implemented only in "files" (for now).
   */
  #define NSS_DBOP_NETGROUP_IN            (NSS_DBOP_next_iter)
  #define NSS_DBOP_NETGROUP_SET           (NSS_DBOP_NETGROUP_IN  + 1)
+ #define NSS_DBOP_NETGROUP_BYNAME        (NSS_DBOP_NETGROUP_SET + 1)
  
  /*
   * The backend for getpublickey and getsecretkey (getkeys)
   */
  #define NSS_DBOP_KEYS_BYNAME            (NSS_DBOP_next_iter)