freebsd-dev/lib/libc/net/nslexer.l
Jacques Vidrine 46d9306383 = Implement name service switch modules (NSS modules). NSS modules
may be built into libc (`static NSS modules') or dynamically loaded
  via dlopen (`dynamic NSS modules').  Modules are loaded/initialized
  at configuration time (i.e.  when nsdispatch is called and nsswitch.conf
  is read or re-read).

= Make the nsdispatch(3) core thread-safe.

= New status code for nsdispatch(3) `NS_RETURN', currently used to
  signal ERANGE-type issues.

= syslog(3) problems, don't warn/err/abort.

= Try harder to avoid namespace pollution.

= Implement some shims to assist in porting NSS modules written for
  the GNU C Library nsswitch interface.

Sponsored by:	DARPA, Network Associates Laboratories
2003-04-17 14:14:22 +00:00

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%{
/* $NetBSD: nslexer.l,v 1.3 1999/01/25 00:16:17 lukem Exp $ */
/*-
* Copyright (c) 1997, 1998, 1999 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Luke Mewburn.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
#if defined(LIBC_SCCS) && !defined(lint)
static char *rcsid =
"$FreeBSD$";
#endif /* LIBC_SCCS and not lint */
#include "namespace.h"
#include <ctype.h>
#define _NS_PRIVATE
#include <nsswitch.h>
#include <string.h>
#include <syslog.h>
#include "un-namespace.h"
#include "nsparser.h"
#define YY_NO_UNPUT
%}
%option yylineno
BLANK [ \t]
CR \n
STRING [a-zA-Z][a-zA-Z0-9_]*
%%
{BLANK}+ ; /* skip whitespace */
#.* ; /* skip comments */
\\{CR} ; /* allow continuation */
{CR} return NL;
[sS][uU][cC][cC][eE][sS][sS] return SUCCESS;
[uU][nN][aA][vV][aA][iI][lL] return UNAVAIL;
[nN][oO][tT][fF][oO][uU][nN][dD] return NOTFOUND;
[tT][rR][yY][aA][gG][aA][iI][nN] return TRYAGAIN;
[rR][eE][tT][uU][rR][nN] return RETURN;
[cC][oO][nN][tT][iI][nN][uU][eE] return CONTINUE;
{STRING} {
char *p;
int i;
if ((p = strdup(yytext)) == NULL) {
syslog(LOG_ERR,
"NSSWITCH(nslexer): memory allocation failure");
return ERRORTOKEN;
}
for (i = 0; i < strlen(p); i++) {
if (isupper((unsigned char)p[i]))
p[i] = tolower((unsigned char)p[i]);
}
_nsyylval.str = p;
return STRING;
}
. return yytext[0];
%%
#undef _nsyywrap
int
_nsyywrap()
{
return 1;
} /* _nsyywrap */
void
_nsyyerror(msg)
const char *msg;
{
syslog(LOG_ERR, "NSSWITCH(nslexer): %s line %d: %s at '%s'",
_PATH_NS_CONF, yylineno, msg, yytext);
} /* _nsyyerror */