1  /* Services file parser in nss_files module.
       2     Copyright (C) 1996-2023 Free Software Foundation, Inc.
       3     This file is part of the GNU C Library.
       4  
       5     The GNU C Library is free software; you can redistribute it and/or
       6     modify it under the terms of the GNU Lesser General Public
       7     License as published by the Free Software Foundation; either
       8     version 2.1 of the License, or (at your option) any later version.
       9  
      10     The GNU C Library is distributed in the hope that it will be useful,
      11     but WITHOUT ANY WARRANTY; without even the implied warranty of
      12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      13     Lesser General Public License for more details.
      14  
      15     You should have received a copy of the GNU Lesser General Public
      16     License along with the GNU C Library; if not, see
      17     <https://www.gnu.org/licenses/>.  */
      18  
      19  #include <netinet/in.h>
      20  #include <netdb.h>
      21  #include <nss.h>
      22  
      23  #define ENTNAME		servent
      24  #define DATABASE	"services"
      25  
      26  struct servent_data {};
      27  
      28  #define TRAILING_LIST_MEMBER		s_aliases
      29  #define TRAILING_LIST_SEPARATOR_P	isspace
      30  #include "files-parse.c"
      31  #define ISSLASH(c) ((c) == '/')
      32  LINE_PARSER
      33  ("#",
      34   STRING_FIELD (result->s_name, isspace, 1);
      35   INT_FIELD (result->s_port, ISSLASH, 10, 0, htons);
      36   STRING_FIELD (result->s_proto, isspace, 1);
      37   )
      38  
      39  #include GENERIC
      40  
      41  DB_LOOKUP (servbyname, ':',
      42  	   strlen (name) + 2 + (proto == NULL ? 0 : strlen (proto)),
      43  	   ("%s/%s", name, proto ?: ""),
      44  	   {
      45  	     /* Must match both protocol (if specified) and name.  */
      46  	     if (proto != NULL && strcmp (result->s_proto, proto))
      47  	       /* A continue statement here breaks nss_db, because it
      48  		bypasses advancing to the next db entry, and it
      49  		doesn't make nss_files any more efficient.  */;
      50  	     else
      51  	       LOOKUP_NAME (s_name, s_aliases)
      52  	   },
      53  	   const char *name, const char *proto)
      54  
      55  DB_LOOKUP (servbyport, '=', 21 + (proto ? strlen (proto) : 0),
      56  	   ("%zd/%s", (ssize_t) ntohs (port), proto ?: ""),
      57  	   {
      58  	     /* Must match both port and protocol.  */
      59  	     if (result->s_port == port
      60  		 && (proto == NULL
      61  		     || strcmp (result->s_proto, proto) == 0))
      62  	       break;
      63  	   }, int port, const char *proto)