glibc/nss/nss_files/files-service.c

/* Services file parser in nss_files module.
   Copyright (C) 1996-2019 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library 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
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   <http://www.gnu.org/licenses/>.  */

#include <netinet/in.h>
#include <netdb.h>


#define ENTNAME		servent
#define DATABASE	"services"

struct servent_data {};

#define TRAILING_LIST_MEMBER		s_aliases
#define TRAILING_LIST_SEPARATOR_P	isspace
#include "files-parse.c"
#define ISSLASH(c) ((c) == '/')
LINE_PARSER
("#",
 STRING_FIELD (result->s_name, isspace, 1);
 INT_FIELD (result->s_port, ISSLASH, 10, 0, htons);
 STRING_FIELD (result->s_proto, isspace, 1);
 )

#include GENERIC

DB_LOOKUP (servbyname, ':',
	   strlen (name) + 2 + (proto == NULL ? 0 : strlen (proto)),
	   ("%s/%s", name, proto ?: ""),
	   {
	     /* Must match both protocol (if specified) and name.  */
	     if (proto != NULL && strcmp (result->s_proto, proto))
	       /* A continue statement here breaks nss_db, because it
		bypasses advancing to the next db entry, and it
		doesn't make nss_files any more efficient.  */;
	     else
	       LOOKUP_NAME (s_name, s_aliases)
	   },
	   const char *name, const char *proto)

DB_LOOKUP (servbyport, '=', 21 + (proto ? strlen (proto) : 0),
	   ("%zd/%s", (ssize_t) ntohs (port), proto ?: ""),
	   {
	     /* Must match both port and protocol.  */
	     if (result->s_port == port
		 && (proto == NULL
		     || strcmp (result->s_proto, proto) == 0))
	       break;
	   }, int port, const char *proto)